close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2109784

код для вставки
March 1, 1938;
F. J,. SHEPARD, JR, ET AL
2,109,784
INDUSTRIAL PLATFORM
Filed Nov. 12, 1934
5 Sheets-Sheet l
'
nnTors.
Frederick U.Shepord Ur.
Nathaniel Worshow
WWW& W
ATTys.
March 1, 1938.
F. JZSII-IEPARD, JR" ET AL.
_
2,109,784 I
INDUSTRIAL PLATFORM
1
.
|
Ibiza/:33
Filed NOV. 12, 1934
-
-
3 Sheets-Sheet 2
~
2'7 %
\\
\\\\\\\\\m'
-
‘lnvenTors.
37
FfedeTiCK Lishepard qt
Nathaniel Warsh'qw
WWW‘! _
-
'
March 1, 19389
‘F. JpSHEPARD. JR., ET AL
2,109,784
INDUSTRIAL PLATFORM‘
Filed Nov. 12, 1934
Figl? ' J1
\
5 Sheets-Sheet 3
43 5843 Fig.17
5| [/5252] 50
//( fy/ /
M 44 4s 52 48
r‘
I
l l
4:4 ‘46/ 47 6057 i6!
'
7s
’
lhver?ors.
FTGdET'IICK J. Shepard dr.
NuThani'el'Warshaw
Anya.’
2,109,784
Patented Mar. 1, 1938
‘UNITED STATES PATENT. omcs
2,100.7“
mnus'ramr. rm'rroau
Frederick J. Shepard, In, vWest Newton, and '
Nathaniel Warshaw, Mattapan, Mala, assign
on ‘to Lewis-Shepard Company, Watertown,
.
Mass., a corporation of Massachusetts
Application November 12, 1934, Serial No. 752,648
‘
,1 Claims. (01. use-‘120)
This invention relates to improvements in platform to sustain a given loadthan other plat
portable platforms or skids, and the general ob
forms of like capacity.
ject of the invention is to provide a platform or
This is accomplished by providing truss mem
skid having a metal frame and metal legs and bers preferably in the form of angle bars ex
5 so constructed as to-be of greater rigidity with tending longitudinally of and secured to the side 5
respect to bending, twisting, or torsional strains > frames intermediate of the leg members, there
‘than any platform of the same weight which’ by increasing the rigidity of the side frame to
has heretofore been produced.
,
'
One of the objects of the present invention is
10 to provide means for remedying this defect and
also for increasing the strength and rigidity of
'. the platform. This‘ is accomplished in the pres
ent invention by providing supplemental girders
spaced apart from the end girders respectively
it suitable distances such as are determined by the
width of one or more ?oor boards, and rigidly se
cured to the side frames, so that the supplemental
cross girders together with the ?oor boards be
tween the same and the adjacent end girder will
20 present such a rigid structure as will effectively
prevent bending of the front girder and’ conse
quent distortion of the platform in the manner
above described. . Such supplemental cross girder
such an ‘extent that smaller angle bars may be
employed for platforms of a given capacity than
has heretofore been deemed possible“
10 '
These and other objects and featuresof the
invention will more fully appear from the fol
lowing description and the accompanying draw
ings and will be particularly pointed out in the
claims.
.
l5
Illustrative embodiments of the various novel
features of the invention are shown in the ac
companying drawings, in which,
Fig. l is a perspective view of a platform or
skid construction having an all-welded metal 20
frame and embodying the invention;
'
Fig. 2 isan enlarged longitudinal vertical sec
tional view of the construction shown in Fig. 1,
also greatly strengthens the platform against the central portion being broken away;
25 lateral distortion in rough usage, as where the
platform is rotated on its edges or corners in
moving it from place to place, or where a plat
form dropped from the top of a pile lands on one
of its corners.
30
_
Another object of the invention is to provide
legs, preferably of general U-shape, presenting
wide ?at feet to rest upon the floor, and outer
and inner leg members extending upwardly from
the foot portion'and connected at their upper
35 ends to the side frames and preferably alsoto
the front girder, and to a proximate supple
mental cross girder, thereby providing a sup
porting construction of such rigidity that it will
not collapse inwardly or outwardly by the load
40 imposed upon it, or by the impact of an elevat
ing truck when pushed beneath the platform at
an angle to its length. The larger feet of such
leg members are also advantageous in that the
wide foot does not wear out as quickly, or wear
45 the floor as much as usual narrow foot members.
Furthermore, when one loaded platform is-tiered
upon another loaded platform, the additional
resting surface of the wide foot‘ presents a much
50 more secure support and minimizes the liability
. of the superimposed platform to slip upon the one
Fig. 3 is an enlarged end elevation of the con- 25
struction shown in Fig. 1, the central portion be
ing broken away;
_
-
Fig. 4 is a transverse sectional view of the same
on lines 4-4 Fig. 2, the central portion being
broken away and showing particularly the man- 30
ner in which the upper end of the inner leg
member is notched to fit the face of the lower
horizontal flange of the side member and the
transverse girder, and showing the manner in
which the members are welded together;
35
Fig. 5 is a detail sectional view showing the end
of the inner legmember engaging the horimntal
?ange of the lower side frame member with a
spacer between the upper end of the leg member
and the under face of the supplemental horizon- 40
tal girder and also showing the manner in which
these members are welded together;
‘
>
Fig. 6 is a detail view similar to Fig. 5, show
ing the end portionof the inner leg member
abutting against the lower horizontal ?ange of 45
the side member and welded to said side mem
ber, with welding material ?lling the space be
tween the upper end of said'leg member and the
horizontal ?ange of the supplemental transverse
girder;
50 I
Fig. '7 is a sideelevation of the platform con
therebeneath.
struction illustrated in Figs. 1 to 4, showing also
' Another object of the invention is to provide a a strut interposed between the lower horizontal
frame construction'for industrial skids or plat flange of the side frame member and the hori
“ forms which will permit the building of a lighter
rental flange of the angle iron truss member;
as
2
2,109,784
Fig. 8 is a side elevation of a reenforced plat
form construction showing a truss similar to that
so that an elevating truck can be introduced lon
illustralted in Fig. 7 extending along the longi
tudinal central portion of the side frame and ter
minating short of the legs;
of the platform;
Fig. 9 is a side elevation of a platform reen
forced by a different form of truss which is con
nected at its ends to the side frame and also
to the inner leg members, with a strut between
10 the central portion of the truss member and the
lower horizontal ?ange of the side frame;
Fig. 10 is a side elevation of a platform simi
lar to that illustrated in Fig. 9, showing a shorter
truss member secured at its ends to the hori
zontal ?ange of the side frame only;
Fig. 11 is an enlarged detail vertical sectional
view on lines H--l| Fig. 7, showing the fabri
cated construction of the side frame and angle
bar truss member and the preferably channel
shaped strut positioned midway of the length
of the platform between the horizontal ?anges
of the side frames and the truss member;
Fig. 12 is an enlarged detail view of a modi
?ed form of side frame and truss in which the
angle bar truss member is so secured to the lower
angle bar of the side frame as to provide a box
like construction;
Fig. 13 is a view similar to Fig. 12, showing a
construction in which the truss member is in the
form of a smaller angle bar than that forming
the lower member of the fabricated side frame,
this construction being particularly adapted for
lighter types of platforms;
Fig. 14 is a detail vertical sectional view illus
trating another arrangement of side frame and
truss members fabricated from angle bars to pro
duce a box-dike reenforced construction;
Fig. 15 is an enlarged detail view showing a
different form of fabricated side frame, showing
40 also the horizontal ?ange of the supplemental
girder and the upper portion of the inner leg
member notched to engage the under face of the
side frame and the horizontal ?ange of the sup
plemental girder and the manner in which it is
45 welded thereto;
Fig. 16 is a longitudinal sectional view of an
industrial platform or skid embodying the inven
tion, in which the members of the fabricated side
frames are rigidly connected together by rivets
or other fasteners and in which wide leg mem
bers are secured to side frames and horizontal
supplemental and/or end girders by bolts, rivets,
or other fasteners;
Fig. 17 is a detail view on lines l‘l—i‘|' Fig. 16,
showing a spacer equal to the thickness of the
horizontal ?ange of the lower side member in
terposed between the ?anged upper end of the
inner leg member and the horizontal ?ange of
the supplemental girder;
gitudinally either beneath the ends or the sides
‘
I Fig. 21 is a detail transverse sectional view on‘
lines 2|-2| Fig. '20; and,
Fig. 22 is a detail view showing the frame con
struction illustrated in Fig. 20, showing a differ
ent means for securing the upper end of the leg
member to the side frame and to the horizontal
girder.
I
10
The platform or skid construction disclosed in
all of the ?gures of the drawings may be gen
erally described as a portable platform com
prising ?oor members, complementary channel
shaped metallic side frames, preferably fabrie
cated from associated longitudinally overlapping
angle bars rigidly fastened together with their
horizontal ?anges parallel to provide a channel
embracing and tightly ?tting the ends of the
?oor boards, with horizontal metal end girders
connecting the end portions of the side frames,
and supplemental cross girders suitably spaced
from the respective end girders by a ?oor mem
ber or members and connected at their ends to
the side frames, together with metallic legs 2.5
mounted on the side frames at or adjacent the
ends thereof, and comprising an outer leg mem
ber connected to the horizontal ?ange of the
side frame and preferably also to an end girder,
a foot portion preferably of considerably greater 30
width than that of the horizontal flange of the
side frame and an inner leg member connected
to the side frame and also to the proximate sup
plemental cross girder.
The construction of the fabricated side frames
and of the form and arrangement of trusses
therefore may be varied as is exemplified by the
Illustrative embodiments shown in the drawings.
The leg members also may be of different shapes
and secured at their ends to the side members 40
and to the horizontal end and/or supplemental
girders in various ways, as by welding, bolts,
rivets, etc., as shown in the various ?gures of
the drawings. It will therefore be obvious that
the invention is not limited to particular de
tails of fabricated side frame construction, or
particular types of rigid connections between
the several parts, and that the constructions
shown and described herein are therefore illus
trative of preferred embodiments of the inven
tion.
The particular form of platform or skid illus
trated in Figs. 1 to 4 of the drawings comprises
complementary side frames each formed of an
upper angle bar having a vertical ?ange l and
a. horizontal ?ange 2 and a lower angle bar hav
ing a vertical ?ange 3 and a horizontal ?ange
l, the vertical ?anges i and 3 of the respective
angle bars being rigidly secured together in any
suitable mariner, but preferably by a continuous
Fig. 18 is a view centrally broken away show
ing at the left a side elevation of the modified or intermittent line of welding 5. In the con
form of reenforced platform construction and struction of the side frames the horizontal flanges
2 and 4 are spaced apart such distance as 'to
at the right a longitudinal sectional view thereof;
Fig. 19 is a vertical transverse sectional view provide channels 6 to receive the end-s of the
' on lines i9--i9 Fig. 18, showing the horizon¢ "?oor boards 1, with the horizontal ?anges 2 and 65
tal ?ange at the upper end of the leg member 4 engaging respectively the upper and lower sur
faces of the ends of the ?oor boards. If desired,
split, and the sections thereof secured respec
tively to the lower horizontal ?ange of the side the ?oor boards may be rabbeted at their ends
so that the upper faces thereof will be flush with
member and to the horizontal ?ange of a trans
the upper faces of the ?anges 2 of the side frames. 70
verse girder;
Fig. 20 is a longitudinal sectional view of a >
The side frames are connected at their ends
(it)
four-way platform embodying the invention, in
by end girders 8, preferably of angle iron, which
which the fabricated frame is constructed in a 7 desirably extend into the channel 6 of the side
different manner to avoid any projection below frames, and are secured thereto preferably by
the lower horizontal ?anges of the side frames
welding. In order to strengthen the frame and 75
3
2,109,784
to prevent the bending of the front girders by the
impact of the standards of elevating trucks when
forcing the central portions of the side frames
backed
loads upon the platform. -In the constructions
disclosed herein a truss member, in the form of
an angle bar having a vertical ?ange II and a Ol
beneath the
platform, > supplemental
transverse girders 9, preferably also of angle iron,
extend in parallelism with the end girders and
are suitably spaced therefrom by one or more
. ?oor boards It.
The horizontal ?anges of the ,
supplemental girders, which project into the
channel 6 of the side frame, are secured prefer
ably by welding to the side frames. The end
?oor boards III, which fill the space between the
against the bending strains produced by heavy
horizontal ?ange 2 I, is secured‘to the lower angle‘
bar of the fabricated side frame. 'As illustrated
in'Figs. l to 4, the vertical ?anges 20 of the truss
member are secured preferably by welding to the
vertical ?anges I of the side member. The lines 10
of welding securing these ?anges together may
end girder and the supplemental girder, will
be continuous or intermittent, or the members
transmit the force of impact against the end gird
may be secured together by rivets, bolts, or in
er to the supplemental girder, so'that the con- ‘
any other suitable manner.
joint action of these members will effectively pre
In the construction illustrated in Fig. 2, the
horizontal ?anges _2i of the truss member are of
such width that their edgesf is: are ?ush with or
, vent bending of the end girder and consequent
‘distortion of the platform.
'
.
‘ In the invention disclosed in Figs. 1 to 4 wide extend slightly beyond the inside edges of the '
leg members are provided comprising an outer inner leg members, thereby providing guides,
.20 leg member II, a horizontal ?at foot member i2, - adapted to be engaged by the platform of a truck
and an inner leg member i3 of greater width when backed beneath the platform at an angle
than the width of the horizontal ?ange .of the to its length, and which will prevent engagement
side frame. The legs preferably are made of ?at of the end of the truck with a rear leg member
stock usually substantially thicker than the and will also aid in properly positioning the truck
beneath the platform. v
25 ?anges of the associated angle bars which form
the fabricated side frames. The leg and foot " As illustrated in Fig. 2 the ends of the ?anges
members II and I2 desirably are throughout 20 and 2| ?t against the inner leg members l3
their length of greater width than the width of and are welded thereto. The truss members,
the horizontal ?anges of the members of the side therefore, not only strengthen the side frames
30 frame, thereby presenting relatively large areas
by means of which the inner and outer leg mem
bers can be secured not vonly to the side frame,
but also to the supplemental cross girder and‘
preferably also to the end girder.
As illustrated in Fig. 2, the outside leg member
35
is substantially vertical and at its upper end ex
tends across the end of the side frame and is
welded thereto and to the upper edge of the end
cross girder 8 by a line or lines of welding l4.
~10 The leg member may also be welded to the ver
of the platform against bending stresses, but also 30
reenforce the leg members against lateral dis
tortion when the platform is struck sidewise by _
a truck carrying one or more platforms. .
The construction illustrated in Figs. '1 and 11
is similar in all respects to that illustrated in
Figs. 1 to 4 except that a strut, preferably in the .
.form of a short metallic channel bar 23, is in
terposed between the horizontal ?ange 2| of the
truss member and the horizontal ?ange 4 of the?’
lower angle bar of the side frame, the strut mem- ‘o
tical ?ange of the transverse girder 8 by a line
ber desirably being welded at its lower and upper
of welding i5.
ends to said horizontal ?anges.
’
The inner leg member extends upwardly and
rearwardly from the foot I2 and its end engages
the horizontal ?ange 4 of the side frame, and
as illustrated in Fig. 4 may be notched to engage
also the horizontal ?ange of the transverse sup.
plemental girder 9. In this construction the inner
leg I! is welded both to the lower angle bar of
the fabricated: side frame and to the horizontal
?ange of the transverse supplemental girder 8. '-\'
_
Fig. 8 illustrates a similar construction for a
lighter form of platform in which an angle bar
truss 24 extends only along the central portion 45
of the side frames and is welded thereto in the
manner above described. It also desirably is pro
vided with a strut 25 interposed between the
horizontal ?ange of the truss member and the
horizontal ?ange of the lower angle bar of the 60
frabricated side frame. This manner of reen
Fig. 5 discloses a modi?ed form of construction . forcing the side frames is especially adapted to
}
in. which the upper end of the inner leg I; is not the lighter types of platforms.
notched, but a metal ?ller orspacer i8 is intro
‘In the construction illustrated in Fig. 9 the
duced into the spacebetween the upper end of side frames are constructed in the manner above 55
the leg member and the lower face of the hori
described and the leg members suitably secured. Y .
zontal ?ange of the supplemental transverse
preferably by welding, to the side frames, and
girder 9. In this construction the spacer or ?ller
desirably also to the end and supplemental
girders. In this construction the side frames are
reenforccd by trusses in the form of rods or bars 00
26 which are welded respectively at their ends to
the side frames‘ and also to the inneicleg them
is welded both to the supplemental girder 9 and
60 to the upper end of the leg member.
The leg
member is also welded to the lower angle bar of
the side frame.
The construction shown in Fig. 6 is similar to
that illustrated in Fig. 5, with the exception that
the space between the upper end of the leg mem
ber and the horizontal ?ange of the supplemental
transverse girder is ?lled entirelywith welding
material. Such construction can be readily made
particularly where the side frames are fabricated
from like angle bars.
In order further to increase the rigidity of the
platform or skids of the type described and to
enable them to be made of lighter stock than has
been used for platforms of like capacity, struts
are provided in the present invention for reen
bers l3. In this construction the trusses extend \
downwardly from their lines of attachment to
the side frames and struts. are interposed between 65
the central portions of the trusses and the hori-,
zontal ?anges of the respective lower angle bars
of the side frames, the struts being welded both
to the horizontal ?ange of the side frame mem
ber and also to the trusses.
70
In Fig. 10 a construction is disclosed which is
similar to that in Fig. 9 except that the truss
26, which may be in the form of a bar, is welded
'or' otherwise secured at its ends to the side
frame and not to the inner leg members.
76
4
2,109,784
Various forms of side frames and truss reen
iorcements embodying the invention differing
from that shown in Figs. 7 and 11 are illustrated
in Figs. 12, 13, and 14. The construction illus
trated in Fig. 12 comprises side frames fabricated
from longitudinally overlapping angle bars hav
' ing the vertical ?anges I and 3 connected to
gether with the horizontal ?anges 2 and 4 em
bracing the ends of the ?oor members ‘i. The
l0 truss member comprises an-angle bar having a
vertical ?ange 23 and a horizontal ?ange 23, the
_upper edge of the ?ange 28 being welded to the
horizontal ?ange 4 of the lower side bar member,
and the horizontal ?ange 23 being welded to the
15 vertical ?ange 3 of the lower side bar member,
thereby forming a b0x—like girder construction
of great rigidity.
Fig. 13 shows a similar construction in which
the truss member comprises a smaller angle bar
having a vertical ?ange 33 and a horizontal
?ange 3| welded respectively at their edges to
the horizontal ?ange 4 and vertical ?ange 3 of
the lower angle bar of the fabricated side frame.
This construction is adapted for relatively lighter
platforms than those constructed as illustrated in
Fig. 12.
In Fig. 14 a modi?ed side frame construction
is illustrated comprising an upper angle bar
having a horizontal ?ange 32 and a vertical
30 ?ange 33 associated with a lower angle bar hav
ing a vertical ?ange 34 welded to the vertical
?ange 33 so that the horizontal ?ange 35 will
extend inwardly. The channel-shaped side
frame is formed by another angle bar having a
horizontal ?ange 35 which desirably rests upon
the upper end of the ?ange 34 and may be
welded thereto with the vertical ?ange 31 resting
upon and welded to the horizontal ?ange 35 of
the lower angle bar. In, this construction the
40 space between the horizontal ?ange 35 and the
under face of the upper ?ange 32 provides a
channel 38 which receives the ends of the floor
board members.
Fig. 15 illustrates another form of fabricated
side frame comprising an upper angle bar having
a vertical ?ange 39 and a horizontal ?ange 40
adapted to engage the upper face of the ?oor
board. This upper angle bar is associated with
a lower angle bar having a vertical ?ange 4|
overlapping the ?ange 40 and secured thereto by
welding with the lower horizontal ?ange 42 ex
tending inwardly in parallelism with the ?ange
40 of the upper angle bar. The ?oor boards ‘I
and the horizontal ?ange of the transverse end
girder are shown as extending into the channel
formed by the upper and lower angle bars, and
the inner leg member I3 is illustrated as notched
at its upper end and secured to the ?ange 4| of
the lower side frame member and the horizontal
60
welded frame construction enables the use of
softwood. such as Oregon ?r, and the like, which
are not tough enough to hold bolts, and which
may be employed where service does not require
the use of hardwood as in the handling of metal,
castings, and the like.
Illustrative embodiments of such other types
of trucks embodying the invention are shown in
Figs. 16 to 22 inclusive. In the construction illus
trated in Fig. 16, the side frames each are fabri 10
cated from longitudinally overlapping angle bars,
the ?anges of which are secured together by
rivets or bolts. In the particular construction
illustrated in Figs. 16 and 17 the side frames
comprise an upper angle bar having a horizontal 15
?ange 43 and a vertical ?ange 44 and a lower
angle bar having a horizontal ?ange 45 parallel
to the horizontal ?ange 43 and a vertical ?ange
48 which engages the vertical ?ange 44 and is
secured thereto by suitable rivets or bolts 41 20
spaced apart at suitable intervals. In fabricat
ing said side frames the-horizontal ?anges of
the upper and lower angle bars are spaced apart
such distance as will cause them to engage ?rmly
the upper and lower faces of the ?oor boards 25
43. as above described.
In this construction the side frames are con- _
nected by horizontal angle iron end girders 45
the ends of which extend into the channels of the
side frames and the horizontal ?anges 50 of which
rest upon the horizontal ?anges 45 of the lower
angle bar of the side frame. In this construc
tion likewise supplemental horizontal girders 5|
of angle iron extend at their ends into the chan
nels of the respective side frames with their hori
zontal ?anges 52 resting upon the horizontal
?anges 45 of the lower members of the side
frames.
In this construction the leg members are
formed of ?at stock bent into U-shape to provide
outer leg members 53, foot members 54, and inner
leg members 55. The outer and inner leg mem
bers are bent at their .ends to provide horizontal
?anges 55 and 51 adapted to engage respectively
the lower ?anges 45 of the side frames. The
?anges 55 of the outer leg members are secured to
the side frames and to the horizontal end girders
43 by, bolts 58 which extend through the upper
and lower ?anges 43 and 45 of the side frames.
the ?oor boards and the horizontal ?anges 53 of
50
plemental girder therebetween.
members so that the elevating truck can be in
rigidity of the platform.
troduced beneath the side of the platform as
well as beneath the end thereof.
The invention is disclosed in Figs. 1 to 15 of
the drawings with particular reference to an
In view of the fact that the horizontal ?anges
50 of the end girder and the horizontal ?ange
52 of the supplemental girder rest upon the hori
zontal ?anges 45 of the side frames, a space will
This con
40
the ?anges 51 of the inner leg members 55 are
secured to the side frames by bolts 59 which ex
tend through the upper and lower horizontal
?anges 43 and 45 of the side frames and the
?oor board and the horizontal ?ange of the sup
struction is particularly adapted to the four
way type of platform as nothing extends below
the horizontal ?ange 42 between the inner leg
in the manner heretofore described.
35
the end girders therebetween, thereby rigidly
binding all of these parts together. Similarly,
In this platform or skid construction the leg
members are of greater width than the width of
the side frame to provide wide feet and the
?anges at the upper ends of the leg members are
suitably secured to the horizontal ?anges of the
end and supplemental girders to increase the
?ange of the supplem:ntal girder 3 by welding
30
65
70 integral all-welded platform frame construction remain between the horizontal ?anges 56 and 51 70
which in the practical manufacture of platforms '. of the inner and outer leg members and the hori
or skids is found to be most economical and’ zontal ?anges 5D and 52 of the end and supple
satisfactory particularly with ‘respect to the uni
form rigidity of the platforms or skids so con
76 structed.
Furthermore, the rigidity of the all
mental girders respectively. In order to make
suitable connection therefore between the inner
portion of the horizontal ?anges of the leg mem 75
9,109,784
bers and the horizontal girder, some expedient
cured directly to the horizontal ?ange of the sup
must be employed. In the construction shown in plemental girder ‘II by a rivet M in the manner’
Figs. 16 and 17, a spacing plate or shim 80 is in - heretofore described ‘in respect to Fig. 19.
It is, therefore, apparent that the construc
terposed between the upper end of the ?ange 51
of the inner leg member and the horizontal ?ange tions disclosed in Figs. 16 to 22 inclusive embody
52 of the supplemental girder. These parts are the wide foot construction and/or the truss re
enforcements of the character disclosed in Figs. ’
rigidly secured together by a rivet 6|. Such ad
ditional connection will substantially increase the 1 to 15 inclusive,.diifering only in that the, mem
bers of the side frames are secured together by
rigidity of the construction.
bolts
or rivets, and in that the assemblage of 10
In
the
construction
illustrated
in
Figs.
18
and
19
v10
the side frames, horizontal end girders, supple
the side frames and the connecting end and sup
plemental girders and legs, and the means for mental girders, and legs, are rigidly secured to
securing the legs to the side frames and end and gether by bolts instead of by welding.
It will therefore be’ understood that the par- _’
supplemental girders may be and are the same
ticular embodiments of the invention speci?cally 15
15 as shown in Figs. 16 and 17, with the exception
that in the construction illustrated in Fig. 19 the disclosed herein are of an illustrative character
?anges l1 and II of the inner and outer leg and are not restrictive of the meaning and scope
members are slitted longitudinally, and one of the of the claims. and that various changes incon
sections 62 of the ?anges offset upwardly and struction and arrangement of parts may be made
20
20 secured directly to the horizontal ?ange 52 of the within the spirit and scope of the claims.
supplemental girder by rivets 83.
Having‘thus described the invention, what is
In the construction illustrated in Figs. 18 and claimed as new, and desired to be secured by Let-.
'
19, the side frames are reenforced'by angle iron ters Patent, ‘is:
l. A portableplatform comprising ?oor mem-'
trusses having vertical ?anges 64 which are se
cured by a series of rivets 85 to the vertical ?anges bers, complementary channel-shaped side frames 25
ll of the lower side frame members. These truss each having a vertical wall extending across the
ends of the ?oor members and horizontal ?anges
members may extend only along the central por
tion of the side frames, or throughout the whole overlying and underlying the end portions of said _
distance between the inner leg members if de-' ?oor members, horizontal metal end girders hav
sired and the horizontal ?anges 66 of the trusses ing their ends extending into the channels of said
may be of any desired width. Such reenforcing side frames and resting upon the lower horizon
tal ?anges of said side frames and rigidly secured
trusses may also
employed in the construc
to said side frames, supplemental ~angle iron
tions shown in Figs. 16 and 1'7.
In Figs. 20, 21, and 22, a four-way platform or cross girders suitably spaced from the respective
end‘ girders by ?oor members and having their 35
85 skid construction is shown in which the associ
ated angle bars forming the side frames are \ ends extending into the channels of said side.
differently arranged and in such manner as to frames and resting upon the lower horizontal
avoid any downwardly extending ?ange which ?anges thereof and rigidly secured to said side
would interfere with the introduction of a truck frames, metal legs of greater width than the
width of said side frames, each comprising an
40 beneath the frame from its side.
In this construction the side frame comprises outer. leg member, a foot member and an inner
an upper angle bar having a horizontal ?ange
81 and a vertical ?ange 68 and a lower angle bar
having a vertical ?ange 69 which overlies and en
gages the vertical ?ange 68 and a horizontal
?ange ‘III which extends in parallelism with the
?ange 61 and is spaced apart therefrom the de—
sired thickness of the floor board ‘I I. In this con
struction the horizontal end girders" and sup
plemental transverse girders 13 extend at their
ends into the channels of the side frames, as
"
leg member, means rigidly securing said outer
leg member to said side frame and also to the
end girder, and means'rigidly securing said in
ner leg member to, the side frame and also to the
proximate supplemental cross girder.
'
2. A portable platform comprising ?oor mem
bers, complementary side frames each fabricated
from associated upper and lower angle bars hav
ing overlapping vertical ?anges welded together
to present a channel embracing the ends of said
?oor members, horizontal end girders welded to
?at stock considerably. Wider than the ?anges of said side frames, pairs oi’ integral metal legs each
the side frames, are provided and comprise outer > comprising an outer member welded to said side
leg members 14, feet 15 and inner leg members 16. frame adjacent its end, a foot portion and an in
The inner and outerleg members are provided at ner leg member welded to said side frame, and
reenforcing angle bar truss members located be
their ends with horizontal ?anges ‘I1 and 18.
In the construction illustrated in Fig. 21 the tween the inner leg members of the respective
horizontal ?anges 81 and ‘Ill, the ?oor board ‘II, side frames and welded to the lower angle bars
and the horizontal ?ange of the supplemental of said side frames with their horizontal ?anges 60
cross girder are secured together and to the leg well below the lower horizontal ?anges of the
above described.
U-shaped legs, preferably of
members ‘I1 by bolts 19. Similar bolts 80, secure
the horizontal ?anges of the side frame, the ?oor
board and horizontal end girder and the ?ange
18 of the outer leg member rigidly together. In
this construction a ?lling piece or spacer BI is
side
frame.
'
'
.
,
3. A portable platform. comprising ?oor mem
bers, complementary side frames each fabricated
from associated upper and lower angle bars hav 66
ing overlapping vertical ?anges welded together
to present a channel embracing the ends of said
interposed between the ?ange TI and the hori
zontal ?ange 13 of the supplemental girder and is. ?oor members, horizontal end girders welded to.
secured by a rivet 82 to the ?ange 11 and/or to said side frames, pairs of integral metal legs each
70 the horizontal ?ange of the, supplemental girder. comprising an outer member welded vto said side 70.
The construction shown in detail in Fig. 22 is frame ‘adjacent its end, a foot portion and an in
similar to that illustrated in Fig. 21,- except that ner leg member welded to said side frame, reen
forcing angle bar truss members located between '
the ?ange ‘l1, and also the ?ange 18, at the up
the inner leg members of the respective side
per end of the leg members are slitted longitudi
75 nally to provide an offset portion 83 which is seJ frames welded to the vertical ?anges of said side
6
frames with their horizontal ?anges located ‘well
below the lower horizontal ?anges of the side
bars, and struts'interposed between the central
portions of the respective truss members, and a
horizontal ?ange of the side frame.
4. A portable platform comprising ?oor mem
bers, complementary side frames each fabricated
from associated upper and lower angle bars hav
ing vertical ?anges welded together to present a
ed from associated angle bars having overlap
ping downwardly extending vertical ?anges
welded together to present a channel embracing
the ends of said ?oor members, horizontal end
girders welded to said side frames, supplemental
cross girders suitably spaced by ?oor members
from the respective end girders extending into
said channels and welded to said side frames, in
tegral metal U-shaped legs of greater width than
channel embracing the ends of said ?oor mem
the horizontal ?anges of said side frames each
bers, horizontal end girders welded to saidside comprising an outer member welded to the end
frames, supplemental cross‘ girders suitably , of the side frame and to said end girder, a foot
spaced from the respective end girders by ?oor portion and an inner member welded to said side
‘ members extending into said channels and welded frame and to the proximate supplemental end
to said side frames, integral metal legs each com
girder, and a reenforcing angle bar truss having 15
prising an outer member welded to said side
frames and to the end girder, a foot portion and
an inner leg member welded to said side frame
its ?anges welded respectively to the vertical and '
horizontal ?anges of the lower angle bar of the
side frame to provide a box-like construction.
and to the proximate supplemental cross girder,
7. A portable platform comprising floor boards,
20 and reenforcing angle bar truss members each
complementary side frames each fabricated from
having its vertical ?ange and horizontal ?ange
longitudinally overlapping angle bars having
welded to the inner leg members of each side
frame and its vertical ?ange welded to the side
frame.
their horizontal ?anges parallel to provide a
channel embracing and tightly ?tting the ends
of the ?oor boards, horizontal angle bar girders
extending at their ends into said channels, sup
5. A portable platform comprising ?oor'mem
bers, complementary side frames each fabricated
from associated angle bars having overlapping
downwardly extending vertical ?anges welded to
gether to present a channel embracing the ends
30 of said ?oor members, horizontal end girders
welded to said side frames, integral metal legs
25
each comprising an outer member welded to said
side frame, a foot portion and an inner leg mem
ber welded to said side frame, and a reenforcing
35 angle bar forming a truss located between the
inner leg members of each side frame having its
vertical ?ange welded to the vertical ?ange of
the side frame with the edge of its horizontal
?ange spaced apart from the lower face of the
40 platform and extending to the vertical plane of
the inner edges of said leg members to form a
guide for a truck when backed beneath said
plemental angle bar girders suitably spaced from
said end girders and extending at their ends into
said channels, U-shaped legs comprising outer
and inner leg members having flanged upper
ends underlying said end and supplemental gird 30'
ers and bolts extending respectively through the
horizontal ?anges of said side members, end
girders and supplemental girders and through
the ?anges of said inner and outer legs, clamp
ing said side members upon said ?oor boards and 35
securing said leg members to said side members
and to said endv and said supplemental girders,
said leg members being wider than the horizon
tal ?anges of said side members and having their
?anges slitted longitudinally, and rivets connect
ing the portions of said ?anges underlying the
supplemental girder to said supplemental girder.
platform.
6. A portable platform comprising ?oor mem
45 bers, complementary side frames each fabricat
FREDERICK J. SHEPARD, JR.
NATHANIEL WARSHAW.
Документ
Категория
Без категории
Просмотров
0
Размер файла
1 107 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа