close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2111063

код для вставки
March 15, 1938.
J, A, CRAVEN
2,111,063
COLLAPSIBLE coma
Filed July 24, 1936
NEE/.M.
-m.
mg/@Pm
\
vr
\Qw'
ail!Iftr?’
//V VE N TUE
JA Y A - GRAVEN.
his ATTUE’NEK
Patented Mar. 1 5, 1938
2,111’ '
UNITED STATES FATET OFFEQ
2,111,063
coLLArsIBLE CORE
Jay A. Craven, Dayton,‘ Ohio
Application July 24, 1936, Serial No; 92,413
4 Claims.
5
(01. 25-131)
This invention relates to a collapsible core for
use in the construction of hollow concrete structures and it is designed more particularly for use
in the construction of a- hollow concrete wall. In
cores showing the complete separation of the two
parts of the wall; Fig‘. '7 is a sectional detail view
of a portion of such a concrete wall showing the
inwardly extending ?ns formed between the cores;
the construction of hollow ‘concrete walls an
inner form isarranged between and spaced from
and Fig.‘ 8 is a plan view of the guide for the
actuating member.
.
,
the side members of the outer form and inasmuch
as it is ‘not usually practical to make this inner
form of a length equal to the length of the wall
In the drawing I have illustrated one embodi
ment of my invention and I have shown the same
as comprising parallel side members or walls i9
10 it is customary to use a plurality of collapsible
cores or sections which are arranged end to end
between the side members of the outer form. The
part which is movable inwardly with relation to
the side members in such a manner as to draw the
crete connection between them but are [connected
side members one toward the other and thus col
necessarily results in the ends of the cores being
spaced short distances one from the other. The
cores heretofore used have been’‘ of such a character that the soft'concretewould enter the space
25 between adjacent cores, above and below the tie
bars, and would so ?ll thiS Space ‘945 t0 fOI‘m a
concrete tie between the two parts of the wall
which is highly objectionable because it permits
of the transmission vof moisture’ from the outer
30 part of the wall to the inner part thereof.
One object of the present invention is to provide acollapsible core which will be of simple inexpensive construction and can be easily collapsed,
1.0
which are connected at their ends by end mem- l’l
bers or walls, each of which end members has a
two-parts of the hollow wallshould have no con-
15 :one to the other only by metallic/tie bars, there
being usually a plurality of series of such tie‘ bars,
the bars of each series being arranged one above
the other in Spaced relation- The adjacent ends
of the cores of the inner form abut against the
20 Opposite Sides of the respective tie bars" arid this
G
1
’
A-further object of the invention is to provide
such a core which will have no overlapping parts
slidable one upon the other.
A--further object of the invention is to provide
5
lapse the core. In the particular construction 15
shown each end member comprises two longi
tudinal parts H which are pivotally connected
one to the other and with the adjacent edges of
the respective side-members. Preferably each
part H of the end member is provided with hinge 20
bearings to receive hinge pins lg,
Arranged between the side members iii is an
actuating device which is so connected with the
respective end members that it will impart in
ward or outward movement to said members and 25
thus collapse or expand the core. Preferably this
actuating device comprises a longitudinally mov
able member is which is connected with the end
members by links 54 each of which is pivotally
connected at one end to the actuating member 30
l3 and pivotallyconnected at its other end to a
U-shaped lug it which extends about the pivot
pin 12 which connects the two parts of the end
member one to the other.
The links and the
actuating member function as a toggleand when 35
the actuating member is moved downwardly the
links will extend the end members thus forcing
the side members to their outermost positions.
a'collapsible core of such a character that the . If the two links are moved into'alinement one
spacesbetween adjacent cores, above and below
the tieibars, will not be ?lled with concrete, thus
avoiding any connection between the two parts
of the hollow wall other than the metallic tie bars.
Other objects of the invention may appear as
45 theydevice is described in detail.’ I
5
with the other the-core will be positively locked 40
in its extended position, but it is sometimes ide
sirable to move the end members outwardly slight
ly ‘beyond their normal extended positions and I
have provided means for retaining the core mem
bers intheir normal extended positions without 45
In the accompanying drawing Fig. 1 is a plan ' fully extending the links, as will hereinafter ap
view of_ a collapsibleicore embodying my inven- pear, The upward movement of the actuating
tion; Fig. 2~isa side elevation of the same, partly member will move the connected edges of the two
in section; Fig. 3 is) an end View of such a‘ core, parts of each end wall inwardly, thus drawing the
50 partly‘ in section; Fig. 4 isa sectional detail view side members’ inwardly‘tothe positions shown in 50
'of a-portion of the core; Fig. 5 is a horizontal _dotted lines in Fig.4, thereby simultaneously mov
sectional view taken through a concrete wall}, ing the four core members out of contact with
showinggportions of two cores in position inthe
wall; Fig. 6 is- a vertical section of a portion of
5.1 awall which has been formed with'my collapsible
the concrete wall. v_ The actuating member may
be manipulated, in any suitable _manner but I
prefer to provide a screw for actuating the same, 55
2,111,063
and, as here shown, a nut i6 is rigidly secured
to a supporting member or plate ll‘ which is
carried by the side members of the core and is
slidably connected therewith, as by means of the
metallic clips 18, so that the side members may
have movement with relation to the supporting
member ll. Rotatably mounted in this nut is a
screw E9 the lower end of which has swiveled con
nection with the upper end of the actuating mem
10 ber 13, is shown at 29, so that the screw may
rotate with relation to the actuating member but
the actuating member will move vertically with
the screw. Any suitable means may be provided
for rotating the screw and, as here shown, the
upper end of the screw is squared to receive a
socket Wrench or the like. The pitch of the
screw thread is su?iciently low to render the
screw self-locking so that the core members will
be automatically secured in any position to which
20 they may be moved.
If desired telescoping guide members 2! and 22
may be rigidly secured to the inner surfaces of the
side members to maintain the same in their
proper relative positions and, if desired, the side
members may be reinforced, as by means of angle
bars 23. It may also be desirable to provide a
guide to retain the actuating member E3 in an
approximate vertical position and thus cause sub
stantially equal movements to be imparted to the
two end members. As here shown overlapping
guide plates 32 are secured to the respective side
members and provided with registering apertures
to receive the actuating member. The apertures
are of such size and shape as to prevent any ap~~
preciable movement of the actuating member
lengthwise of the core, that is, toward either end
member, but to permit the guide plates to move
with relation to the actuating member in a
direction transverse to the core, so as not to inter
fere with the expansion and contraction of the
core members.
In order to prevent the formation of a con
crete tie between the two parts of the hollow
wall each end member of the core is provided with
45 outwardly extending vertical parts spaced one
from the other to form between them a recess.
In the present construction the two parts H of
the end wall are curved outwardly about separate
axes extending lengthwise thereof so that the
intermediate or connected edges of these parts
are spaced inwardly over the outermost surfaces
thereof to form a substantially V-shaped recess.
When the several cores constituting the inner
form are placed in position between the side
55 members of the outer form the adjacent ends of
the cores will abut against the opposite sides of
tie bars 24, as shown in Fig. 5. These tie bars
are supported by the side members of the outer
form and extend through and beyond said side
members, the end portions of the tie bars being
weakened, as shown at 25 in Fig. 6, to permit
these end portions to be broken off after the con
crete has set. When the two cores are in con
tact with the tie bar the recesses in the end
65 members of the two cores will be in opposed rela
tion so as to form between them a vertical cham
ber 26 which is of a width or diameter substan
tially greater than the thickness of the tie bars.
When the soft concrete is poured into the forms
70 it will enter the V-shaped spaces between the
outer sides of the two cores but the coarse ag
gregate will quickly clog the narrow space be
tween the outwardly curved portions of the end
members I I so that little or no concrete will enter
75 the chamber 26 and any small quantity of con
crete which may enter that chamber will drop to
the bottom of the chamber where it will do no
harm. Consequently the intermediate space be
tween the outwardly curved portions of the end
members, which constitutes the chamber 26, will
never be ?lled with concrete and there will be no
concrete tie between the two parts of the con
crete wall. The concrete which enters the V
shaped spaces at the sides of the cores will assume
the shape shown in Fig. 7 but the ?ns 27 thus
formed will terminate in the narrow spaces be
tween the outwardly projecting curved portions
of the end members so that the ?ns on the two
parts of the concrete wall will be spaced a Very
substantial distance one from the other, as shown
in Fig. 6, where the concrete wall is indicated by
the reference numeral 28.
The cores may be of any desired dimensions
and will usually be made of a depth correspond
ing to that portion of the wall which can be
formed by a single pouring of concrete. This
depth will vary and it may be substantially great
er than the length of the core. When one sec
tion of the wall has been poured and has set the
cores are collapsed and moved upwardly in
preparation for the pouring of another section
of the wall, the lower end of each core remaining
in the formed portion of the wall to properly
locate the core with relation thereto. To facili
tate this resetting of the core the side members 30
may be provided near their lower ends with spurs
36 which will bite into the wall and temporarily
support the core in its adjusted position. The
side members may, if ‘desired, be provided with
means, such as apertured lugs 3!, for attaching
a lifting device to the core, to facilitate the han
dling of the same.
While I have shown and described one embodi
ment of my invention I wish it to be understood
that I do not desire to be limited to the details
thereof as various modi?cations may occur to a
person skilled in the art.
Having now fully described my invention, what
I claim as new and desire to secure by Letters
Patent, is:
1. A collapsible core for a concrete structure
comprising side members and end members con
necting the adjacent edges of said side members,
each end member having two ~longitudinal parts
pivotally connected one to the other and to the 50
edges of the respective side members, whereby
the inward or outward movement of said end
members will impart corresponding movement
to said side members, an actuating member ar—
ranged between said side members and opera
tively connected with said end members, and an
operating device having supporting connection
with both side members and operatively con
nected with said actuating member to cause the
latter to impart either outward or inward move 60
ment to said end members, the connection be
tween said operating device and said side mem
bers being such as to permit the latter to move
toward and from each other.
2. A collapsible core for a concrete structure
comprising side members and end members con
necting the adjacent edges of said side members,
each end member having two longitudinal parts
pivotally connected one to the other and to the
edges of the respective side members, whereby the
inward or outward movement of said end mem
bers will impart a corresponding movement to
said side members, a vertically movable actuating
member arranged between said side members,
links pivotally connected with said actuating
75
2,111,063
member and the respective end members, a sup
porting member mounted on said side members
and slidably connected therewith to enable said
‘side members to move toward and from each
other, and a screw mounted on said supporting
member for vertical movement with relation
thereto and operatively connected with said ac
tuating member.
'
3. A collapsible core for a concrete structure
10 comprising side members and end members con
necting the adjacent edges of said side members,
each end member having two longitudinal parts
pivotally connected one to the other and to the
edges of the respective side members, whereby
15 the inward or outward movement of said end
members will impart a corresponding movement
to said side members, a vertically movable actu
ating member arranged between said side mem
bers, links pivotally connected with said actuat
20 ing member and the respective end members, an
operating device supported by said coreand op
eratively connected with said actuating member
to impart vertical movement thereto, and a guide
for said actuating member arranged between said
side members and acting on said actuating mem
3
her to hold the same against substantial trans
verse movement toward either end member.
4. A collapsible core for a concrete structure
comprising side members and end members con
necting the adjacent edges of said side members,
each end member having two longitudinal parts
pivotally connected one to the other and to the
edges of the respective side members, whereby the
inward or outward movement of said end mem
bars will impart a corresponding movement to 10
said side members, a vertically movable actuat
ing member arranged between said side members,
links pivotally connected with said actuating
member and the respective end members, an op
erating device supported on said side walls and 15
operatively connected with said actuating mem
ber to impart vertical movement thereto, and
guide members carried by and movable with the.
respective side members and having alined open
ings through which said actuating member ex 20
tends, said openings being shaped to permit said
side members to move toward and from said ac
tuating member and to hold the latter against
substantial movement toward either end member.
JAY A. CRAVEN.
25
Документ
Категория
Без категории
Просмотров
0
Размер файла
513 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа