U.S. patent number 3,919,808 [Application Number 05/456,190] was granted by the patent office on 1975-11-18 for door structure.
Invention is credited to Donald F. Simmons.
United States Patent |
3,919,808 |
Simmons |
November 18, 1975 |
Door structure
Abstract
A door structure having a pair of hinged doors opening from the
center, with one of said doors having a post-like member mounted on
its center edge containing a latch mechanism. The latch mechanism
includes an upper and lower axial movable shafts and an operating
mechanism between said shafts for extending the upper and lower
ends of the respective shafts into slots of the frame of the door.
An operating lever for said mechanism is disposed along the center
edge of the door and operates both of said shafts simultaneously to
lock and unlock the door. A lock on the other door includes a bolt
which extends into the post-like member which includes a plate
along the inner side having a channel for receiving a decorative
strip and providing a flange against which the other door seats
when it is closed.
Inventors: |
Simmons; Donald F. (Elkhart,
IN) |
Family
ID: |
23811826 |
Appl.
No.: |
05/456,190 |
Filed: |
March 29, 1974 |
Current U.S.
Class: |
49/367;
292/40 |
Current CPC
Class: |
E05C
7/04 (20130101); Y10T 292/0844 (20150401) |
Current International
Class: |
E05C
7/00 (20060101); E05C 7/04 (20060101); E05C
007/04 () |
Field of
Search: |
;49/366-369
;292/35,40 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Downey; Kenneth
Attorney, Agent or Firm: Hobbs; Marmaduke
Claims
I claim:
1. A door structure comprising a frame, a pair of doors hinged to
said frame and opening from the center, a box member secured to the
center edge of one of said doors and having an elongated channel of
generally rectangular cross section and an elongated strip
insertable in the edge of said box facing the other door, a latch
means disposed in said box member and having a retainer and an
upper and lower axially movable shaft for engaging a socket in the
frame at the top and bottom parts thereof, guide means for said
shafts disposed in said channel, and an operating mechanism in said
retainer having a member interconnecting said shafts and having an
operating handle disposed along the edge of said box member between
said doors when said doors are in closed position for operating
both of said shafts simultaneously, said latch means being mounted
on said elongated strip and being inserted in said channel as said
strip closes the open side of said channel, and a means on said
other door for retaining it in closed position while said latch
means is retaining said other door in closed position.
2. A door structure as defined in claim 1 in which said channel is
secured to the edge of one of said doors with the open side of the
channel facing the other of said doors.
3. A door structure as defined in claim 2 in which said operating
handle extends through an elongated slot in said strip and is
retracted into said channel when the door is latched.
4. A door operating structure as defined in claim 3 in which said
operating mechanism includes a shaft, rotatable member mounted on
said shaft in said channel and links connecting said rotatable
member to the inner ends of said shafts.
5. A door structure as defined in claim 1 in which said box member
includes a plate along the inner side thereof providing a flange
extending beyond the center edge of said box member for said other
door to seat thereon.
6. A door structure as defined in claim 4 in which said box member
includes a plate along the inner side thereof providing a flange
extending beyond the center edge of said box member for said other
door to seat thereon.
7. A door structure as defined in claim 6 in which said plate
includes a channel and, an insert of decorative material is seated
in said channel.
8. A door structure as defined in claim 1 in which said means on
the other door is a lock having a bolt extending from the center
edge of the door and said box member includes a slot for receiving
the end of said bolt for locking said other door in closed
position.
9. A door structure as defined in claim 6 in which said means on
the other door is a lock having a bolt extending from the center
edge of the door, and said box member includes a slot for receiving
the end of said bolt for locking said other door in closed
position.
Description
Double doors are frequently used for the rear opening of campers,
pick-up campers, trailers and other vehicles, with each door being
hung to swing outwardly and being latched at the center. One of the
doors is latched to the frame of the door, either at the bottom or
top or both, with chain bolts, which require anyone opening both
doors to reach inside of the vehicle compartment, and which
occasionally become unlatched, thus permitting both doors to swing
open while the vehicle is traveling, even though both doors were
initially locked. Further, these prior doors sometimes became loose
and permitted dust and dirt to sift into the compartment either
while the vehicle is parked or traveling. It is therefore one of
the principal objects of the present invention to provide a double
door structure which includes a center member or box between the
doors, but secured to one of them and containing and enclosing the
latching mechanism, and in which the operating handle for the latch
mechanism is located between the doors so that the latch mechanism
for one of the doors cannot be operated until the other door has
been opened, thus eliminating unintentional unlocking of both doors
simultaneously.
Another object of the invention is to provide a double door
structure having bolts at the top and bottom which are operated
simultaneously by a single lever located between the door, and
which are fully concealed within the door structure and frame when
the doors are closed.
Still another object of the invention is to provide a double door
structure of the aforesaid type in which the basic structure of the
two is identical in construction, and a center member or box
containing the latching mechanism is secured to the center edge of
one of the doors, thus eliminating the need for fabricating doors
of different construction for the double door combination.
A further object is to provide a center door box member containing
a latch mechanism for double doors, which can be easily assembled
in place and secured to the center edge of one of the doors, and
which includes a means for retaining a panel insert for matching
the decor in the compartment of the camper or other vehicle.
Additional objects and advantages of the present invention will
become apparent from the following description and accompanying
drawings, wherein:
FIG. 1 is a perspective view of a camper showing the present door
structure installed thereon;
FIG. 2 is a perspective view similar to that shown in FIG. 1
showing the doors in open position;
FIG. 3 is a fragmentary perspective view showing one of the doors
open and one of the doors closed;
FIG. 4 is a perspective view of the door structure of FIGS. 1, 2
and 3 showing the double door arrangement with one of the doors in
open position;
FIG. 5 is a vertical cross sectional view taken on line 5 -- 5 of
FIG. 4;
FIG. 6 is a vertical cross sectional view taken on line 6 -- 6 of
FIG. 5, showing the door in latched position;
FIG. 7 is a vertical cross sectional view similar to that shown in
FIG. 6, showing the door in its unlatched position;
FIG. 8 is an enlarged fragmentary cross sectional view of the area
indicated by Numeral 8 on FIG. 6;
FIG. 9 is a horizontal cross sectional view taken on line 9 -- 9 of
FIG. 8; and
FIG. 10 is a perspective view of a parts retainer of the latch
mechanism shown in FIGS. 8 and 9.
Referring more specifically to the drawings, numeral 10 indicates
generally a camper having the present door structure 12 installed
therein. For the purpose of the present description, the camper is
considered conventional and consists of a body 14, and an
undercarriage 16. The present door structure, however, is designed
to be used in combination with a variety of different kinds of
vehicles such as pick-up campers, fifth wheel campers, travel
trailers, mobile homes and the like. The camper may also be of the
fold down type, i.e. a camper in which the top is elevated when it
is being used and folded down on the upper edges of the body when
it is being moved.
The door structure to which the present invention relates includes
a frame 20 having upper and lower frame members 22 and 24 and
vertical side members 26 and 28, the two doors 30 and 32 being
hinged to vertical frame members 26 and 28, respectively, as
illustrated by numerals 34 and 36. The doors are essentially
identical in construction, those shown in the drawings consisting
of a peripheral frame 40 having outside panel 42 and inside panel
44 spaced from one another, the outside panel preferably being of
material similar to that of the external surface of the vehicle
body, and the inside panel preferably being finished to conform to
the decor of the compartment of the camper or other vehicle body.
The frame of the door is offset as illustrated at numeral 46, thus
providing a flange 48 for seating on flange or outer edge 49 of the
upper and lower frame members 22 and 24.
The principal feature of the present invention is the manner in
which the double door arrangement is fastened, the feature
consisting of a center post or box member 50 which is secured to
the edge of the inner frame member of one of the doors, for example
door 30. The post swings with the door and contains the latch
mechanism for securing the door in its closed position. The post
forms a part of the door and swings with the door when the door is
opened, and consists of a generally rectangular channel member or
box 60 of metal such as extruded aluminum. This box is secured to
the inner edge of the door frame by a plurality of screws 62
extending through wall 64 of the box into the frame of the door,
and is thus held securely in place by the screws so that it
effectively becomes a part of the door. The box contains the latch
mechanism, best seen in FIGS. 8, 9, and 10, consisting of an upper
shaft 70, a lower shaft 72 and an operating mechanism 74 connected
to the two shafts and including links 76 and 78, respectively. The
upper shaft 70 is supported for axial movement by a plate 80 at the
upper end of the box and a bracket 82 near the lock mechanism, and
the lower shaft is retained in position for axial movement by a
plate 84 at the bottom of the post and a bracket 86 near the
operating mechanism 74. The two brackets are rigidly secured to a
retainer 88, which in turn is secured to the inner surface of wall
90 of the box member. The retainer includes holes 92 and 94 in side
walls 96 and 98 for receiving a shaft 106, and a slot 100 is
provided in retainer wall 102 for receiving the operating handle
104 of the operating mechanism. Shaft 106 is journalled in holes 92
and 94 for free rotative movement of lock operating element
110.
The upper and lower ends of shafts 70 and 72 extend into holes 112
and 114 of door frame members 22 and 24 and hold door 30 in firmly
latched position when the operating handle is moved upwardly to
extend the two shafts 70 and 72 upwardly and downwardly,
respectively. When the latch is in the position to latch the door
closed, operating handle 104 is almost fully retracted into slot
100, thereby permitting door 32 to close without any interference
from the handle. Door 32 is retained in its closed position by a
lock 120 having a handle 122 on its inner side and knob 124 on its
outer side, and a bolt 124 for seating in slot 126 in box member
50. The knob may have a keyhole or slot for locking the door.
The box member 50 has a plate 140 on the inner side adapted to
receive a strip 142 which can be inserted into the slots 144 and
146 when the box member is being assembled on the door. The insert
is normally of a material which blends with the decor or trim of
the inside of the camper or other vehicle body. After the box
member has been secured in place, the latch mechanism can be
installed in the post by sliding wall 90 into slots 148 and 150 in
the body of the post. Thus, with this type of an assembly, the
extruded body of the post can be firmly secured to the door and
then the latch installed so that a rigid, permanent structure is
obtained with a minimum amount of cutting and drilling being
required.
In the assembly and operation of the present door structure, the
frame is installed in the opening provided therefor in the vehicle
body, either with or without the doors. The door structure
including the two doors may be constructed separately and the
entire door assembly inserted as a unit. In the construction of the
door assembly, the box member 50 is secured to door 30 by screws
62, and the lock assembly on wall 90 is inserted in the hollow body
of the box member. After the post has been secured to the door and
assembled in the foregoing manner, door 30 may be easily latched
when it is in closed position by merely raising the operating
handle from a downwardly extending position shown in FIG. 7 to an
upwardly extending position seen in FIG. 6, the latter position
holding the extended ends of shafts 70 and 72 in holes 112 and 114,
thus retaining the door in its closed position. With the latch
mechanism in the position shown in FIGS. 6 and 8, door 32 can be
secured in closed position by lock 120, the outer edge of plate 140
forming a flange 160 against which the inner side of the frame of
door 32 seats to form, in effect, a jamb and seal for the door,
thus closing any space which might otherwise exist between the two
doors. A seal strip 162 is preferably used to form a water tight
seal between the doors.
Since the operating handle 104 is disposed between the doors and
operates both the upper and lower shafts simultaneously to latch
the door at the top and bottom, the door 30 remains securely in
closed position when the handle is moved to its upper latching
position. The door post or box member thereby forms a firm and
reliable securing member for lock 120 when door 32 is closed. With
the handle disposed between the doors, it cannot be operated to
open door 30 until door 32 has been opened, thus eliminating
inadvertently opening of the two doors simultaneously by
accidentally releasing a latch mechanism such as normally used on
the double door arrangement of the prior double doors. The door
structure can be made of various sizes and can be adapted to
various types of vehicles, and can be provided with the proper
paneling, both inside and out, to match the decor and trim. One of
the particular advantages of the present structure is that the post
or box member permits the two doors to be substantially identical
in construction and size, since the post or box member is a
separate unit which is secured to the door after the door has been
assembled.
While the description herein has referred to a door structure, the
same concept can be applied to a window; hence, reference to a door
structure is intended to be sufficiently broad to embrace the use
of the invention in a window structure. Only one embodiment of the
door structure has been described in detail herein; however,
various changes and modifications may be made without departing
from the scope of the invention.
* * * * *