Double hinged door system

Details Double hinged door system Double hinged door system

2001-01-08

2002-06-18

Cohen, Curtis H. (Department: 3634)

Movable or removable closures

Panel with closure feature

C292S244000

Reexamination Certificate

active

06405490

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a double hinged door system. More particularly, the present invention provides a system that comprises a door and a door frame, wherein the door frame comprises a hinge-side vertical member provided with a pair of hinges for holding the door capable of rotating and a latch-side vertical member provided with a latch receiving member for receiving a latch.
2. Description of the Related Art
In general houses, either a left hinged door or a right hinged door is selected to meet a floor plan. The left hinged door is a type where a pair of hinges are attached to the left side of a door, while the right hinged door is that a pair hinges are attached to the right side of the door. Also, two types of door frames are prepared and used to assemble the left hinged and right hinged doors. However, it is inefficient to prepare two types of doors and door frames since there is needed double trouble in production, storage and sale.
To overcome such drawback, the applicant of the present invention invented a door structure comprising a door and a door frame and has filed an patent application in Japan (Japanese Patent Application No. 11-046347). This invention is such that a latch can be positioned at the mid-height of a door without moving a door handle in a vertical direction. According to this invention, a door and a door frame can be utilized for both a left hinged and right hinged door systems.
However, a latch assembled to this door could not correspond to this system because of its figure. Therefore, it is convenient if a latch can be used for both the left hinged and right hinged door systems by simply reversing its posture. Further, it is also convenient if a pair of hinges assembled to the door can be used for both systems.
The applicant of the present invention invented a latch which could be reversed without removing a latch apparatus from a door and has filed a patent application (Japanese Patent Application No. 2000-089430). According to this invention, it is easy to reverse the latch since there is no need to remove the apparatus and plates and other parts included in the apparatus, thus improving working property. Further, according to this invention, it is unnecessary to remove the latch apparatus to reverse the latch, so that there is no need to screw the screws to the points where the screws had once been fastened thereto and have been unfastened to remove the apparatus, so that the screws will not be loosened for that reason, and thus the function of the apparatus will improve. It is economical that only a single plate is required in this invention.
The applicant of the present invention invented a hinge used for both a left hinged and right hinged door system through one touch operation and has filed a patent application for this invention (Japanese Patent Application No. 2000-030671). According to this invention, the hinge can be assembled to a door both from the front and back sides of the door for any number of times through one touch operation, so that it can be used for both the left hinged and right hinged door systems for demands in the fields. Further, in this invention, there is no need to fasten or unfasten wood screws to replace the hinge from the front side to the back side of a door and vice versa, thus an assemble operation becomes easy. And, a demerit of the wood screws, that is a deterioration of holding capability. e.g., becomes no drawback. Further, it is possible to package the parts in separation, so that they are prevented from being deformed or damaged by a outer mechanical shock during transportation, and that they are maintained in a stable posture during transportation. Furthermore, no extra cushion materials are needed, so that a cost for packaging and transportation is saved.
Therefore, an object of the present invention is to provide a double hinged door system in which a structure of a door and door frame, both used for a left hinged and right hinged door systems, is combined with a latch and a pair of hinges, both of which are also used in the left hinged and right hinged door systems, providing a new system.
SUMMARY OF THE INVENTION
A double hinged door system according to a first aspect of the invention comprises a door
10
having a latch driving apparatus
15
which converts a rotation movement of an axis
91
of a door handle
90
into a forward-and-backward movement of a latch
40
; and a door frame having a hinge-side vertical member
20
and a latch-side vertical member
25
. The hinge-side vertical member
20
is provided with a pair of hinges
30
at an upper and lower portions for holding the door
10
capable of rotating. The latch-side vertical member
25
is provided with a latch receiving member
50
having a latch hole
52
for receiving the latch
40
projected from the door
10
.
Each hinge
30
is positioned symmetrical about the midpoint of the hinge-side vertical member
20
, and the latch hole
52
of the latch receiving member
50
is positioned at a point which divides the latch-side vertical member
25
into equal halves.
The latch
40
is arranged capable of rotating and is composed of a front-end member
40
F having a large diameter and a rear-end member
40
R having a smaller diameter. The latch driving apparatus
15
comprises an upward member
61
projected upward from the axis
91
of the door handle
90
; a downward member
62
projected downward from the axis
91
of the door handle
90
; a vertical bar
63
attached to the rear-end member
40
R of the latch
40
capable of sliding; a horizontal bar
64
which includes a large member
64
a
at its end portion and which is connected with the upward member
61
at the front of the large member
64
a
and is also connected with the bottom end portion of the vertical bar
63
at the front portion thereof; a first spring
66
which is sled onto the horizontal bar
64
in between the upward member
61
and the vertical bar
63
, and which pushes the vertical bar
63
in the forward direction, projecting the front-end member
40
F of the latch
40
out of the door
10
; and a second spring
65
which pushes the upward member
61
in the rear direction, returning the door handle
90
to the home position.
The latch
40
is positioned at the level of the latch hole
52
and higher than the axis
91
, and is provided with a concave
40
a
at the front-end member
40
F, and is also provided with a thick portion
40
b
at the rear-end member
40
R. A reversing spring
71
with a greater elastic force than the first spring
66
is sled onto the latch
40
in between the thick portion
40
b
and the vertical bar
63
. The rear-end member
40
R of the latch
40
is pulled out of the door
10
against the elastic force of the reversing spring
71
as a stick
95
, e.g., a screwdriver is pulled after it is inserted into the concave
40
a
, and then the latch
40
is reversed from side to side, and subsequently the latch
40
returns into the door
10
in a reversed posture by an elastic force of the reversing spring
71
as the stick
95
is released from the concave
40
a.
Each hinge
30
comprises a frame-side base member
41
, which is attached to a hinge-side vertical member
20
, and whose front end is connected with a first plate
31
; and a door-side base member
42
, which is attached to the edge side of the door
10
, and whose front end is connected with a second plate
32
. The second plate
32
is removable from the door-side base member
42
, and the door-side base member
42
is embedded at the edge of the door-side base member
42
as such that it is symmetrical about the center line of the edge and that it is not projected from the edge forming a flat surface with the edge.
The door-side base member
42
is provided with a slit
44
in the depth (thickness) direction of the door
10
, which receives the front end of the second plate
32
from both the front and back sides of the door
10
. And a lock apparatus is provided to make an engagement relation with the second plate

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