Note: Descriptions are shown in the official language in which they were submitted.
~045800
The present invention relates to a hinge applicable -
to doors of building construction, furniture such as
cabinets, etc. and other articles, and relates to a
method for making the same.
As to a conventional method for fabricating a hinge,
such a process has been known in which each one side
edge of hinge leaves is rolled up beforehand in a
circular shape to form a cylindrical knuckle part, and a
rod member applicable to either a hinge pintle or a
thrust bearing for supporting the hinge pintle at one
end thereof is tightly inserted into an aperture o~ the
cylindrical knuckle part so as to be rigidly secured
therewithin. In the foregoing conventional method, the
following steps of process have hitherto been known that
15 the rod member is rigidly secured within -the cylindrical ~
knuckle part by piercing a check pin through apertures - --
formed on both the cylindrical knuckle part and the rod
member. However, according to the aforementioned con-
ventional method, it is very difficult to carry out the
processes for inserting the rod member tightly into the
` aperture o~ the cylindrical knuckle part; for forming an
aperture, to insert the check pin therein, on both the
cylindrical knuckle part and the rod member engaged
within the cylindrical knuckle part; and for fixing the
rod member securely within the cylindrical knuckle part
by inserting the check pin into the apertures, so that
a lot of labour and time is needed for fabricating a
hinge. Furthermore, such a hinge thus produced is apt
to lack solidity in structure because of the fact that
~0 the rod member is often sub~ected to be loosely surrounded
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by the cylindrical knuckle part.
One object of the present invention is to provide
a solidly constructed hingeO
~ he other object of the present invention is to
provide a hinge which can be made simply and economically
with lesser labor and in a short peri.od of time.
In order to realize the above-enumerated objects,
a hinge according to the present invention is fabricated
by means of such processes that a rod member applicable
to either a hinge pintle or a thrust bearing is welded
to one side edge of a hinge leaf prior to the formation
of a cylindrical knuckle part on one side edge of the .
hinge leaf, then the hinge leaf is wound at one side ~ ~
edge thereof around the rod member to form a cylindrical :
knuckle part concurrently with positioning the rod
member within the cylindrical knuckle part. -. -
Further objects and characteristics of the present
invention will clearly be understood from the detailed ~ :
description with reference to the attached drawings as
mentioned hereinafter.
In the attached drawings: ~ .
Figure 1a - Figure 1e respectively are schematic
views of a hinge according to the present invention
showing each step of processes in series to bend up one
of hinge leaves for forming a cylindrical knuckle part
thereon;
Figure 2 - Figure 4 are schematic views of a bending
device to be used for the bending processes;
Figure 5 is a longitudinal section view of a hinge
30 formed by the method of fabrication according to the ;
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present invention,
Figure 6 and Figure 7 are sectional views of the hinge
respectively taken along lines VI-VI and VII-VII of Figure 5,
Figure 8 and Figure 9 are longitudinal section views
of other embodiments of the hinge fabricated according to the
method of the present invention respectively;
Figure 10 and Figure 11 are sectional views of one
embodiment respectively taken along lines X-X and XI-XI of
Figure 9.
Figure la - Figure le respectively show a side edge
planes of a hinge leaf, wherein each step of processes in series :
for rolling up a rod member in one side edge of the hinge leaf.
Each step of the processes in series is as follows:
- (A) A metal plate is cut off in a desired dimension
and shape to prepare a blank (1) for a hinge leaf as shown in
Figure la, ~
(B) The blank (1) is bent up at one side edge ~2) thereof ~. :
to form a slight arc shape in profile as shown in Figure lb,
` (C) A rod member (3) having an appropriate length
applicable to either a hinge pintle or a thrust bearing is placed
on a portion (2) bent up to form the arc shape in profile, and :
the rod member is welded on the outer periphery thereof at the
junction (4) with the end plane of the arc portion (2) as shown :
in Figure lc,
(D) The arc portion (2) is wound around the rod member
(3) until the end plane of the ara portion (2) abuts
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against the main body (5) of the hinge leaf to form a
cylindrical knuckle part (6) as shown in ~igure 1d;
(E) The wound portion (6) is t~rned down to be dis-
placed within the plane of the main body (5) as shown in
Figure 1e.
According to the aforementioned method of the
present invention, when the cylindrical knuckle part
(6) is formed on one side edge of a blank (1) for a
hinge leaf, the rod member (3) applicable to either a
hinge pintle or a thrust bearing has already been
surrounded tightly by the cylindrical knuckle part (6)
: along with the cylindrical knuckle part (6) being able
to roll up the rod member (3) therein as an internal
mold, thereby a steady hinge without locseness can be
fabricated economically in less labor and a short period
of time.
Figure 2 shows a step of processes for bending one
side edge of the blank (1) for a hinge leaf to form a :
slight arc shape in profile as shown in Figure 1b by
: 20 means of a lower die (7) and an upper die (8). ~he
blank (1) for a hinge leaf is initially placed on the
horizontal surface (14) of the lower die in such a manner
as indicated by the two dots and dash line that one end
(9) of the blank is extended to come in contact with
: 25 an upright plane (13) by crossing over a groove (12)
formed by a concave arc surface (10) provided on the
lower die and an oblique surface (11) extended in upward
inclination from the end portion of concave arc surface.
~: After having placed the blank (1) on the lower die~ the
upper die (8) is adapted to slide down along the upright
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plane (13) of the lower die to press one side edge of the
blank (1) by the arc-shaped nose (15) of the upper die,
thereby the one side edge is subjected to be bent nearly
to an arc shape corresponding to the concave groove in
profile as indicated by the solid lineO
Figure 3 illustrates a step of processes in series
for rolling up the aforementioned bent portion (2) of
the blank in a circular shape as shown in Figure 1d by
employing a lower die (16) and an upper die (17)o The
bent portion (2) formed at one side edge of the blank
: welded on the rod member (3) is placed on a semi-circular
groove (18) provided on the lower die (16) as indicated
by the solid line to set the main body portion (5) of
: the blank for a hinge leaf to be upright along a
vertical plane (19) of the lower die (16), and the upper
end of the blank is pressed by a bottom plane (20) of
the upper die (17) which slides downwards so as to form
; a cylindrical knuckle part (6) at the above-mentioned
bent portion (2) which is rolled up in a circular shape
along the inner profile of the groove (18) as indicated
by the chain line.
Figure 4 illustrates a step of processes in series
for turning up the main body of the blank at the point A
by amploying an upper die (21) and a lower die (22) so
25 as to displace the aforementioned cylindrical knuckle :
part (6) thus rolled up in a circular shape within the
plane of the main body portion (5) for a hinge leaf as
shown in Figure 1e. The cylindrical knuckle part (6) is
engaged within a semi-circular groove (23) of the lower ~ .
die (22) as indicated by the chain line to render the main
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body portion of the hinge leaf to be supported at one
free end (24) -thereof on a horizontal plane (25) of the
lower die (22) 9 thus a clearance (26) is formed between
the main body (5) of the hinge leaf and the horizontal
plane (25)o ~lhen the main body (5) of the hinge leaf is
pushed downward by the upper die (21) at a smooth bottom
plane (27) thereof, the main body of the hinge leaf is
subjected to be turned up at the point A, however 9 the
cylindrical knuckle part (6) is, in this instance~
adapted to be engaged within a recess (28) provided on
the upper die (21), to keep it from being crushed down.
Some examples for application of the rod member (3)
- to either a hinge pintle or a thrust bearing are illust-
rated respectively in Figure 5 - Figure 11.
As for a hinge shown respectively in Figure 5 - ~ .
Figure 7, a portion of a hinge pintle (29) is accommo-
dated within the cylindrical knuckle part (6) formed on
one leaf (30) of the hinge leaves by means of the method
according to the present invention, and a prolonged :
portion (29a) of the hinge pintle is adapted to be
inserted into a cylindrical knuckle part (6a) of the
other hinge leaf (30a), so that load of the door is not
: imparted to act on the hinge pintle but is exerted upon
: both contact surfaces (31) and (31a) of the cylindrical
knuckle part (6).
As for a hinge shown in Figure 8, a hinge pintle (29) -
of one hinge leaf (30) together with a thrust bearing (32)
of the other hinge leaf (30a), the bearing being in
contact with one end of the hinge pintle, are accommo-
30 dated within the cylindrical knuckle parts (6) - (6a) ~ : :
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by means of the method of the present inventionO In
this instance, load of the door is not imparted to act
on both contact surfaces (31) and (31a) of cylindrical
knuckle parts (6) and (6a) but is exerted upon the :
contact surface of the hinge pintle (29) with the ~hrust
bearing (32) so as to rotate hinge leaves smoothly.
Moreover, the hinge leaves may be further pivotable more
smoothly with the help of, for instance, steel balls (33)
provided at one end of the hinge pintle (29) and steel :
bearing discs (34) disposed to be in contact with the
steel balls respectively at one end of the thrust bearing
so as to set the foregoing hinge pintle and the thrust
bearing to a point contact engagement.
As for a hinge shown in Figure 9 - ~igure 11, the
thrust bearing (32) and the cylindrical knuckle part
(6a) surrounding the thrust bearing are provided in the
. middle part on one side edge of the hinge leaf (30a)
by means of the method of present invention, while at the
upper and the lower ends on one side edge of the other
hinge leaf (30) are formed with two cylindrical kmlckle
part (6) at an appropriate distance respectively spaced
from the former cylindrical knuckle part (6a). ~he
above-mentioned two hinge leaves are connected with each
other by means of two hinge pintles (29), and each of
25 hinge pintles is adapted to be inserted into the cylin- :
drical knuckle part (6) through the outer end thereof
formed on the hinge leaf to be aligned in a row inter- ~ ~
mediately between the cylindrical knuckle parts, and -- -
each hinge pintle is subjected to come at the nose ~ ~ -
thereof into contact with the thrust bearing (32)
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respectively. The hinge can be used to be facing in either the
upward or the downward direction by disposing two hinge pintles
to be in contact with the thrust bearing thus arranged as men-
tioned above.
In addition, rings (35) made of synthetic resin are
intermediately disposed between cylindrical knuckle parts, and
hinge leaves can be turned further lighter with the help of the
rings. On both ends of the cylindrical knuckle part are fixed
each of plugs (36) respectively.
The present invention has been illustrated and
described by way of several examples, but is not confined to
examples thus described and illustrated, various modifications
can clearly be made thereto without departing from the ambit of
the spirit according to the present invention disclosed in the
appended claims.
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