U.S. patent application number 10/553313 was filed with the patent office on 2007-03-22 for prefabricating rack frame.
This patent application is currently assigned to TEKNOA INDUSTRIAL INC.. Invention is credited to Cheon Soon Choi.
Application Number | 20070062898 10/553313 |
Document ID | / |
Family ID | 33161620 |
Filed Date | 2007-03-22 |
United States Patent
Application |
20070062898 |
Kind Code |
A1 |
Choi; Cheon Soon |
March 22, 2007 |
Prefabricating rack frame
Abstract
The prefabricating rack frame are comprised of a column and a
cross member. The column have plural slots along a longitudinal
direction at an even interval, and the cross member have a pair of
hooks to be inserted into respective slot, and a location
restrictor is formed between the upper and the lower hook and bent
rectangular to the hook, and tightly contracted on the outer
surface of the column. The cross member further has a pit and a
reinforcement rib; the pit is formed at the outer corner where each
longitudinal end of the cross member meets the foot of the location
restrictor; and a reinforcement rib is provided at the inner corner
of the location restrictor and its configuration counterposes to
that of the pit.
Inventors: |
Choi; Cheon Soon;
(Chungcheongbuk-do, KR) |
Correspondence
Address: |
SHERIDAN ROSS PC
1560 BROADWAY
SUITE 1200
DENVER
CO
80202
US
|
Assignee: |
TEKNOA INDUSTRIAL INC.
Seoul
KR
138-861
|
Family ID: |
33161620 |
Appl. No.: |
10/553313 |
Filed: |
April 14, 2004 |
PCT Filed: |
April 14, 2004 |
PCT NO: |
PCT/KR04/00867 |
371 Date: |
June 15, 2006 |
Current U.S.
Class: |
211/192 ;
211/187 |
Current CPC
Class: |
A47B 57/408
20130101 |
Class at
Publication: |
211/192 ;
211/187 |
International
Class: |
A47B 43/00 20060101
A47B043/00 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 14, 2003 |
KR |
10-2003-0023502 |
Apr 13, 2004 |
KR |
10-2004-0025202 |
Claims
1. A prefabricating rack frame comprised of a column made of a
steel square tube, a cross member made of a bent steel plate, by
which a square is formed, and multiple shelf plates are placed, the
prefabricating rack frame comprising; the column having plural
slots along a longitudinal direction at an even interval; and the
cross member having a pair of hooks to be inserted into respective
slots, and a location restrictor formed between the upper and the
lower hook and bent rectangular to the hook, and tightly contracted
on the outer surface of the column.
2. The prefabricating rack frame as set forth in claim 1, wherein
the slot is comprised of an upper portion having enough room for
the hook to be inserted and having vertical sides which are
parallel to each other; a lower portion having narrower width than
that of the upper portion and which is force-fitted into the hook,
and having vertical sides which are parallel to each other; and a
slant portion formed between the upper portion and the lower
portion.
3. The prefabricating rack frame as set forth in claim 1, wherein
the slot has an inverse trapezoid shape in which a distance of an
upper area is longer than that of a lower area, and has respective
parallel portion that is measured from the bottom of each slot, and
the hook is force-fitted into the parallel portion.
4. The prefabricating rack frame as set forth in claim 1, wherein
the column has a pair of round openings formed at each right and
left of the slot in a parallel way, the location restrictor has a
hole at the center thereof and the hole overlaps any of the round
openings, in which a screw is inserted to any round opening through
the hole.
5. The prefabricating rack frame as set forth in claim 1, wherein a
pair of round openings is formed near the slot of the column, the
column further has a fixing pin that is comprised of a pin member
inserted into any one of the round openings, and a head formed at
an end of the pin member that is contacted at the location
restrictor of the cross member.
6. The prefabricating rack frame as set forth in claim 4, wherein a
thread portion is formed around the circumstance of the pin member,
and the pin member has a fastigiated point.
7. The prefabricating rack frame as set forth in claim 1, wherein
an inner vertical end of the hook is inclined outward along a
direction from top to bottom, and when each hook fits into each
slot, the inner vertical end of the hook contrapsoes the outer side
of the location restrictor against the wall of the column so as to
squash.
8. The prefabricating rack frame as set forth in claim 1, wherein
the cross member further has a pit and a reinforcement rib; the pit
is formed at the outer corner where each longitudinal end of the
cross member meets the foot of the location restrictor; and a
reinforcement rib is provided at the inner corner of the location
restrictor and its configuration counterposes to that of the
pit.
9. The prefabricating rack frame as set forth in claim 8, wherein
the pit and the reinforcement rib are formed perpendicular to the
border line of the location restrictor.
10. The prefabricating rack frame as set forth in claim 1, wherein
the cross member is comprised of a vertical web having a hook and
the location restrictor at each longitudinal end of the vertical
web, and an upper/lower horizontal flange formed at the upper/lower
vertical end of the vertical web and bent perpendicular to the
vertical web and opposite to the extending direction of the
location restrictor.
11. The prefabricating rack frame as set forth in claim 1, wherein
the cross member is comprised of a vertical web having a hook and
the location restrictor at each longitudinal end of the vertical
web; an upper horizontal flange formed at the upper vertical end of
the vertical web and bent perpendicular to the vertical web and
opposite to the extending direction of the location restrictor; and
a lower horizontal flange formed at the lower vertical end of the
vertical web and bent perpendicular to the vertical web and at the
same direction of the location restrictor.
12. The prefabricating rack frame as set forth in claim 10, wherein
a square pipe is used as the column, and the cross section of the
location restrictor and the upper/lower horizontal flange has a
rectangular shape that is fully contacted to the one surface of the
square pipe column.
13. The prefabricating rack frame as set forth in claim 10, wherein
a round pipe is used as the column, and the cross section of the
location restrictor and the upper/lower horizontal flange has an
arc that is fully contacted to the one surface of the round pipe
column.
Description
TECHNICAL FIELD
[0001] This invention relates to a prefabricating rack frame that
can be installed at a store, warehouse, or a library, and on which
different types of goods can be placed. The invention, specially,
relates to the prefabricating rack frame that is made of only a
column and a cross member without additional components, therefore,
shakes can be prevented and structural stability can be
attained.
BACKGROUND ART
[0002] Most shelves can be used for storing or displaying goods at
any types of mart or warehouse. The shelf has a structure in which
several plates are stacked at a predetermined interval, and was
prefabricated for facility of portage, assembly and
disassembly.
[0003] Generally, to establish a prefabricating rack, an angle
having plural slots can be cut at a predetermined length, and can
be fastened by bolts and nuts through the bracket attached to the
angle, thus making a shelf frame. A shelf, made of thin steel or
wood plate, is placed on the horizontal angle.
[0004] However, such a prefabricating shelf needs plural bolts and
nuts to lead troublesome in assembly and disassembly and needs lots
of work time. This brings cost increase.
[0005] Furthermore, angles can be distorted by load of goods placed
on the shelf after long-term usage. That causes plenty of problems
such as an ugly appearance and instability.
[0006] Considering the above problems, an example of the rack frame
enabling assembly without special fastening means is disclosed in
the Korean Utility Model Publication No. 20-1996-0009841.
[0007] The conventional art is comprised of a column having
parallel plural slots and a cross member being assembled with the
column. A hook formed at the cross member is inserted into the
slots of the column, and the cross member is pressed down, thus
completing the assembly between the column and the cross
member.
[0008] This technology has the advantage of easy assembly and
disassembly since no additional fastening means is required.
[0009] However, the conventional art needs to have a gap between
the hook and the slot when the hook is inserted into the slot,
because it would lead to a difficult assembly if there was no gap.
The gap causes a shaking of the cross member fitted into the
column, and it brings structural instability of the prefabricating
rack.
[0010] Considering the above problems, the inventor has proposed a
prefabricating rack frame in the Korean Open-laid Patent No.
2002-0089286(2002.11.29), in which a cross member is assembled in a
force fit with a column to prevent a shake of the rack frame. The
rack frame 3 is comprised of plural columns 1 and plural cross
members 2, by which rectangular frame is shaped as shown in FIG. 1.
A shelf supporter 4 is provided at the column at a predetermined
height, and a glass shelf 5 is placed on the shelf supporter 4,
thereby supporting plural glass shelves 5.
[0011] Furthermore, as shown in FIGS. 2 and 3, in each of the hooks
2a, 2b formed at the cross member 2, an inner end of the hook is
inclined outward along a direction from top to bottom of the hook.
Each hook 2a, 2b fits into each slot 1a, 1b so as to obtain the
rigid assembly force. The slot 1a, 1b has a trapezoid, in which the
lower side S.sub.2 is smaller than the upper side S.sub.1. The
assembly force of the side surface of each hook 2a, 2b can be
increased, which prevents the forward/backward and the right/left
shake.
[0012] However, in this structure, the hook 2a, 2b is
point-contacted on a very partial lower portion of the column 1,
which causes problems of low assembly force.
[0013] Moreover, in the case of the frequent assembly or
disassembly of the column 1 and the cross member 2, wear occurs
between the slot 1a, 1b and the hook 2a, 2b. That lessens the
assembly force, which brings concern about the forward/backward and
the right/left shake.
DISCLOSURE OF INVENTION
[0014] Accordingly, the present invention has been made keeping in
mind the above problems occurring in the prior art, and an object
of the present invention is to provide a prefabricating rack frame
in which the column is fixed with the cross member utilizing
minimum fastening means, thus attaining simple and fast assembly
and disassembly. The coupling portion of both column and cross
member has reinforcement, which causes more rigid assembly force
than any prior art and secures the isolation of a shaking of
forward/backward, right/left direction and the structural
stability, and also shows a satisfactory appearance.
[0015] In order to accomplish those and these objects, the present
invention has characteristic in which; a prefabricating rack frame
comprises a column made of a steel square tube, a cross member made
of a bent steel plate, by which a square is formed, and multiple
shelf plates are placed. The prefabricating rack frame is comprised
of; the column having plural slots along a longitudinal direction
at an even interval; and the cross member having a pair of hooks to
be inserted into respective slot, and a location restrictor formed
between the upper and the lower hook and bent rectangular to the
hook, and tightly contracted on the outer surface of the
column.
[0016] Further, it has another characteristic in that the slot is
comprised of an upper portion having enough room for the hook to be
inserted and having vertical side which is parallel to each other;
a lower portion having narrower width than that of the upper
portion and which is force-fitted into the hook, and having
vertical side which is parallel to each other; and a slant portion
formed between the upper portion and the lower portion.
[0017] Further, it has another characteristic in that the slot has
an inverse trapezoid shape in which a distance of the upper area is
longer than that of the lower area, and has respective parallel
portion that is measured from the bottom of each slot, and the hook
is force-fitted into the parallel portion.
[0018] Further, it has another characteristic in that the column
has a pair of round openings formed at each right and left of the
slot in a parallel way, the location restrictor has a hole at the
center thereof and the hole overlaps any of the round openings, in
which a screw is inserted to any round opening through the
hole.
[0019] Further, it has another characteristic in that a pair of
round openings is formed near the slot of the column, the column
further has a fixing pin that is comprised of a pin member inserted
into any one of the round openings, and a head formed at an end of
the pin member that is contacted at the location restrictor of the
cross member.
[0020] Further, it has another characteristic in that an inner
vertical end of the hook is inclined outward along a direction from
top to bottom, and when each hook fits into each slot, the inner
vertical end of the hook contrapsoes the outer side of the location
restrictor against the wall of the column so as to squash.
[0021] Further, it has another characteristic in that the cross
member is comprised of a vertical web having the hook and the
location restrictor at each longitudinal of the vertical web, and
an upper/lower horizontal flange formed at the upper/lower vertical
end of the vertical web and bent perpendicular to the vertical web
and opposite to the extending direction of the location
restrictor.
DESCRIPTION OF DRAWING
[0022] The above and other objects, features and other advantages
of the present invention will be more clearly understood from the
following detailed description taken in conjunction with the
accompanying drawings, in which:
[0023] FIG. 1 is schematic views illustrating a configuration of a
conventional prefabricating rack frame;
[0024] FIGS. 2 and 3 are views illustrating assembly process of a
column and a cross member of FIG. 1;
[0025] FIG. 4 is a perspective view showing an assembly of a column
and a cross member according to a first embodiment of the present
invention;
[0026] FIG. 5 is a perspective view showing an assembly of a
prefabricating rack frame, on which a shelf is placed;
[0027] FIG. 6 is a front view of a slot of the column according to
first/second embodiment;
[0028] FIGS. 7 and 8 are a perspective view and a side sectional
view of the cross member according to a first embodiment,
respectively,
[0029] FIG. 9 is a perspective view showing an assembly of a column
and a cross member according to a fourth embodiment;
[0030] FIGS. 10 and 11 are is a side sectional view and a top plan
view showing an assembly of a column and a cross member of FIG. 9,
respectively,
[0031] FIG. 12 is a perspective view showing an assembly of a
column and a cross member according to a second embodiment of the
present invention;
[0032] FIGS. 13 and 14 are a perspective view and a side sectional
view of the cross member according to a second embodiment,
respectively;
[0033] FIG. 15 is a perspective view showing an assembly of a
column and a cross member according to a second embodiment;
[0034] FIG. 16 is a perspective view showing an assembly of a
column and a cross member according to a third embodiment;
[0035] FIG. 17 is a front view of a slot of the column according to
a third embodiment;
[0036] FIGS. 18 and 19 are a side sectional view and a top plan
view showing an assembly of a column and a cross member of FIG. 16,
respectively;
[0037] FIGS. 20 and 21 are plan views showing the assembly of a
column and a cross member of FIG. 16; and
[0038] FIGS. 22 and 23 are plan views showing the assembly of a
column and a cross member according to a fourth embodiment;
BEST MODE
[0039] This invention will be described further by way of exemplary
embodiments with reference to the accompanying drawings.
[0040] FIGS. 4 to 11 illustrate a prefabricating rack frame and its
accompanying components according to a first embodiment of the
present invention, FIGS. 12 to 15 illustrate a prefabricating rack
frame and its accompanying components according to a second
embodiment of the present invention, FIGS. 16 to 21 illustrate a
prefabricating rack frame and its accompanying components according
to a third embodiment of the present invention, and FIGS. 22 to 23
illustrate a prefabricating rack frame and its accompanying
components according to a first embodiment of the present
invention. The same components of the embodiments designate the
same reference numbers.
[0041] First, the technology configuration of the first embodiment
(FIGS. 4 to 11) and the second embodiment (FIGS. 12 to 15) will be
described below.
[0042] The prefabricating rack frame of the present invention is
comprised of a column 10 having slot 11 along a longitudinal
direction at an even interval, and a cross member 20 in which a
pair of the hooks is formed at each end of the body of the cross
member 20. A shelf plate P is installed on each cross member 20 in
a multistage. A square pipe is used as the column 10 as shown in
the Figure, but a round pipe can be employed.
[0043] The slot 11 plays a role as a fitter for the cross member
20, but is used as a receiver of a shelf supporter S to support the
shelf plate P.
[0044] The slot 11 can be arranged along from top to bottom at a
predetermined interval, and can be formed at a matchable position
to the cross member or the shelf plate P.
[0045] The slot has an upper portion 11a, a lower portion 11b, and
a slant portion 11c as shown FIG. 6. The upper portion 11a has
enough room for the hook 21 of the cross member 20 to be inserted
and each vertical side is parallel to each other. The lower portion
11b has narrower width than that of the upper portion 11a into
which the hook 21 is force-fitted, and also each vertical side is
parallel to each other. The slant portion 11c is formed between the
upper portion 11a and the lower portion 11b.
[0046] In the configuration of the slot 11, the upper portion 11a
makes easy for the hook 21 to be inserted, the slant portion 1c
leads the hook 21 smoothly into the lower portion 11b, and the
lower portion 11b takes a firm hold of the neck of the hook 21,
thereby satisfying the assembly easiness and the structural
stability.
[0047] At each right and left side of the slot 11, a round opening
12 is symmetrically provided through which a screw 30 is passed in
order to connect the cross member 20 to the column 10. The
symmetric formation of the slot is for inserting the screw 30 into
the designated slot depending on the installation position of the
cross member 20 or the assembly place of the location restrictor
22.
[0048] The slot 11 and the round opening 12 are formed at the same
height of the opposite surface or the adjacent surface of the
square pipe. The cross member 20 is assembled continually in
forward/backward or left/right direction to make up a large shelf.
A pair of hooks 21 is bent at each longitudinal end of the cross
member 20 to be inserted into respective slot 11 of the column
10.
[0049] Furthermore, an inner vertical end of the hook 21 is
inclined outward along a direction from top to bottom of the hook,
which facilitates easy fit. More, when each hook fits into each
slot, the inner vertical end of the hook 21 contraposes the outer
side end of the location restrictor 22 and the upper/lower
horizontal flange 27,28 against the wall of the column 10 so as to
squash, which prevents the forward-backward free movement. The
location restrictor 22 is formed between the upper and the lower
hook 21 and is bent rectangular to the hook 21.
[0050] The location restrictor 22 is tightly contacted to the outer
surface of the column 10 so as to prevent the left/right movement
of the cross member 20. At the center of the location restrictor 22
a hole is provided that can be matched with any of the round
openings 12.
[0051] The hole 23 is used for engaging the hole 12 of the column
10 with the hole of the cross member by the screw 30. The thread
fit prevents the unintentional separation of the column 10 from the
cross member 20.
[0052] A buckling prevention means is provided at a portion where
the location restrictor 22 is extended from the body of the cross
member 20. As shown FIGS. 7, 8, 13, and 14, a pit 24 is formed at
the outer corner where each longitudinal end of the cross member 20
meets the foot of the location restrictor 22. Moreover, a
reinforcement rib 25 is provided at the inner corner of the
location restrictor 22, and its configuration counterposes that of
the pit 24, by which the contractual strength of the corner is
reinforced. It has greater reinforce effect that the pit 24 and the
reinforcement rib 25 are formed perpendicular to the border line of
the location restrictor 22.
[0053] FIGS. 7 and 8 illustrate the cross member 20 adapted to a
first embodiment of the present invention.
[0054] The cross member 20 is comprised of a vertical web 26 and an
upper/lower horizontal flange 27,28. The vertical web 26 has the
hook 21 and the location restrictor 22 at each longitudinal of the
vertical web 26. The upper/lower horizontal flanges 27,28 are
formed at the upper/lower vertical end of the vertical web 26 and
bent perpendicular to the vertical web 26 and opposite to the
extending direction of the location restrictor 22.
[0055] FIGS. 13 and 14 illustrate the cross member 20 adapted to a
second embodiment of the present invention.
[0056] The cross member 20 is comprised of a vertical web 26, an
upper horizontal flange 27, and a lower horizontal flange 28. The
vertical web 26 has a hook 21 and a location restrictor 22 at each
longitudinal side of the vertical web 26. The upper horizontal
flange 27 is formed at the upper vertical end of the vertical web
26 and bent perpendicular to the vertical web 26 and opposite to
the extending direction of the location restrictor 22. The lower
horizontal flange 28 is formed at the lower vertical end of the
vertical web 26 and bent perpendicular to the vertical web 26 and
at the same direction of the location restrictor 22.
[0057] The upper/lower horizontal flange 27, 28, according to the
first, and second embodiment, increase the bending strength of the
cross member 20 by the reinforcement of the vertical web 26.
Furthermore, each longitudinal end of the upper/lower horizontal
flange 28,28 contact the outer surface of the column 10
accompanying with the location restrictor 22, thereby preventing
the left/right movement of the cross member 20.
[0058] To implement the present invention, it is clear that only
any single flange of the upper/lower flange can be adapted.
[0059] Hereafter, the assembly operation of the first/second
embodiment according to the present invention will be described
below.
[0060] First, as shown in FIG. 9, a pair of hooks 21 is inserted
into the slot 11, and the hook 21 is pressed down. Thus, the
assembly is accomplished as shown in FIG. 10.
[0061] Now, it maintains that the surrounding edge of the hook 21
contacts the lower portion 11b of the slot 11 as shown in FIGS. 6
and 11. Also, the location restrictor 22 and the upper/lower flange
27,28 are tightly contacted with the outer surface of the column
10, which prevents the forward/backward and the right/left slight
movement.
[0062] According to the above assembly, the hole 23 formed at the
location restrictor 22 is matched with any of the round openings
12.
[0063] At this state, the thread 13 is engaged with the hole 23 and
the round opening 12 as shown in FIG. 11 and the coupling between
the column 10 and the cross member 20 is accomplished.
[0064] In the present invention, at every assembly portion between
the column 10 and the cross member 20, the above operation is
repeated, and the shelf frame having a rectangular shape is formed.
As shown in FIG. 5, a shelf supporter S is attached at the middle
position of the column 10, and the shelf plate P is laid on the
shelf supporter S.
[0065] Hereafter, the technical components of the third embodiment
will be described below with reference to FIGS. 16 to 21.
[0066] The column 10 has a distance determining means comprised of
a pair of slots 11 and a pair of round openings 12. The slots 11
are formed along the centerline of the column 10 at a predetermined
interval. A pair of round openings 12 is formed adjacent to the
point where the middle between each slot 11 is perpendically
intersected. The distance determining means can change the distance
of each shelf.
[0067] The distance determining means are provided at two side
surfaces of the column 10 or at two surfaces adjacent to each of
the square pipe column 10.
[0068] As shown in FIG. 17, each slot 11 has a respective parallel
portion H.sub.1, H.sub.2 that is measured from the bottom of each
slot, and a distance of the upper area D.sub.1, D.sub.2 is a little
bit larger than that of the lower area d.sub.1, d.sub.2.
[0069] The parallel portion H.sub.1, H.sub.2 increases the contact
size of both slot 11 and hook 21 when the hook 21 is inserted into
the slot 11. While the coupling of the column and the cross member
depends on point contact in any prior art, the hook 21 of the cross
member can be surface-contacted with the parallel portion H.sub.1,
H.sub.2 to obtain large fastening force.
[0070] Each slot 12 has a distance L.sub.1, L.sub.2 from the point
where the middle between each slot 11 is perpendically
intersected
[0071] A pin member 41 of the fixing pin 40 is inserted selectively
into any of a pair of round openings 12 depending on the
installation direction of the cross member 20 or the position of
the location restrictor 22; a head 42 of the fixing member 40
pushes the location restrictor 22.
[0072] The cross member 20 has a pair of hooks 21 formed at each
longitudinal end of the body and inserted into the slot 11, and a
location restrictor 22 provided between the hook 21 that is bent
toward any direction perpendicular to the vertical web 26.
[0073] In the hook 21 as shown in FIGS. 18 and 19, an inner
vertical end of the hook is inclined outward along a direction from
top to bottom of the hook, which facilitates easy fit into the slot
11.
[0074] As the first embodiment, the cross member 20 has a vertical
web 26 and the upper/lower horizontal flanges 27,28 that are bent
perpendicular to the vertical web 26 and are opposite to the
extending direction of the location restrictor 22. However, any of
the upper/lower horizontal flanges 27,28 can be bent at the same
direction to the extending direction of the location restrictor
22.
[0075] The cross section of the location restrictor 22 and the
upper/lower horizontal flange 27,28 has a rectangular shape that is
fully contacted on the one surface of the square pipe column.
[0076] The fixing pin 40 is coupled into the round opening 12 to
push in the location restrictor 22. That is, the hook 21 is coupled
with the slot 11 and the pin member 41 of the fixing pin 40 is
inserted into the round opening 12 provided above the location
restrictor 22. The head 42 of the fixing pin 40 presses the
location restrictor 22 so as to prevent the free movement of the
location restrictor 22.
[0077] The pin member 41 has a fastigiated shape to facilitate easy
fit, and the thread portion is formed around the pin member 41 so
it will not free from the round opening 12.
[0078] A pair of hooks 21 is inserted into the slots 11 and is
pressed down as shown in FIG. 16, the assembly is accomplished as
shown in FIGS. 18 and 19. At this time, both sides of the hook 21
are tightly contacted to the parallel portion H.sub.1, H.sub.2 of
the slot 11, and no free movement takes place owing to the
upper/lower horizontal flange 27, 28 and the location restrictor 22
pressing the area below the round opening 12.
[0079] At this state, the pin member 41 of the fixing pin 40 is
pressed into the round opening 12, the thread portion 43 is
crushed, and the head of the fixing pin 40 presses the location
restrictor 22, thus completing the assembly.
[0080] In the case of the separation of the cross member 20 from
the column 10, a tool such as a flat driver is inserted into a gap
between the head 42 and the outside surface of the cross member 20
so as to push aside the fixing pin 40. The fixing pin 40 can pulled
out from the round opening 12.
[0081] Next, the cross member 10 is pushed upward so as to extract
the hook 21 from the slot 11. Thus, the cross member 20 is easily
separated from the column 10.
[0082] FIGS. 22 and 23 illustrate the fourth embodiment according
to the present invention. The round pipe is used as the column
10.
[0083] The location restrictor 22 and both longitudinal ends of the
upper/lower horizontal flange 27,28 are shaped as an arc to tightly
contact the round tube shape cross member 10. Moreover, the inner
side of the head 42 of the fixing pin 40 is configured as an arc so
as to push the location restrictor 22. The rest of the
configuration and operation are the same as those of the previous
described embodiment. Therefore, the detailed description will be
omitted for brevity, denoting the same reference numerals of the
same components described in the previous embodiment.
[0084] Although the preferred embodiments of the present invention
have been disclosed for illustrative purposes, those skilled in the
art will appreciate that various modifications, additions and
substitutions are possible, without departing from the scope and
spirit of the invention as disclosed in the accompanying
claims.
INDUSTRIAL APPLICABILITY
[0085] According to the present invention, the rectangular rack
frame is accomplished by an assembly in which the column is fixed
with the cross member that utilizes minimum fastening means, thus
attaining simple and fast assembly and disassembly. The coupling
portion of both column and cross member has reinforcement, which
causes more rigid assembly force than any prior art, and secures
the isolation of a shaking of forward/backward, right/left
direction and the structural stability, and also shows a
satisfactory appearance.
[0086] In the cross member, the flange, the location restrictor,
and the upper horizontal flange can tightly contact with the outer
surface of the column. This brings the inventive rack frame by
which a right/left movement can be perfectly prevented.
[0087] Furthermore, while the coupling of the column and the cross
member depends on point contact in any prior art, in the present
invention the hook of the cross member can surface-contact with the
slot of the column to obtain big fastening force.
[0088] Therefore, according to the present invention, easy assembly
and disassembly can be secured, and structure stability can be
ensured by the isolation of forward/backward, left/right shaking of
the components, and also shows the satisfactory appearance.
* * * * *