JPS6020788Y2 - bifold door - Google Patents

Description

[Detailed description of the invention] This invention has runners protruding from both upper and lower ends of both side edges of a door panel that can be freely bent at the center, and each runner is engaged with an upper groove rail and a lower groove rail so that they can run freely. It concerns bifold doors.

Conventionally, this type of bi-fold door is used by fixing the runner on either side of the door panel and leaving the other free.When performing left-right or left-handed, the runner on either side of the door panel is unfixed and the runner on the opposite side is used. It took time and effort to re-fix the door panel, and it was not possible to open and close it easily from either side of the door panel when in use.

In order to be able to easily open and close the door panel from either side edge during use, all runners should be left free instead of fixed, but in that case, the fulcrum for opening and closing would have to move. This makes it difficult to open and close smoothly, and when the door panel is extended and closed,
A new problem arises in that the flat state of the door panel is not maintained and the door panel cannot be closed reliably.

The bifold door of the present invention has been devised in view of the above points, and aims to eliminate the above-mentioned conventional drawbacks without creating new problems.

The present invention will be explained below based on the drawings.

The bifold door shown in FIGS. 1 and 2 is an embodiment of the present invention.

The bi-folding door has runners 4 and 4' projecting from both upper and lower ends of both side edges 3 of a door panel 2 that can be freely folded at a central portion 1, and each runner 4, 4' is connected to an upper groove rail 5 and a lower groove rail 6. A locking recess 7 is provided in the inner bottom wall surface at both ends of the upper groove rail 5.
An inclined guide surface 11 is formed inside the locking recess 7,
On the other hand, each of the runners 4 at the upper ends of both side edges 3 of the door panel 2 is provided with a protruding locking convex portion 8 that projects removably into the locking recess 7 .

Both ends of the upper groove rail 5 and the lower groove rail 6 are connected to the vertical frame 9, and are integrally formed as a rectangular frame.

Furthermore, the bifold door is of a hanging type, with the upper runner 4 being formed as a hanging rolling wheel and the lower runner 4' being formed as a sliding guide pin.

Further, the locking convex portion 8 is attached to the upper runner 4 as shown in FIG.
It is projected upward by the elasticity of the spring body 10 housed in the upper groove rail 5, and when it is not inserted into the locking recesses 7 at both ends of the upper groove rail 5, the upper groove is in the state shown in FIG. It slides in elastic contact with the inner bottom wall surface of the rail 5.

Further, an inclined guide surface 11 is formed inside the locking recess 7 so that the locking projection 8 can be smoothly attached to and removed from the locking recess 7.

In this bi-folding door, one of the locking protrusions 8 can be attached and detached to easily open and close from either side edge 3 of the door panel 2. The protrusion 8 is inserted into the locking recess 7 and does not move as a fulcrum for opening/closing in the locked state, so the opening/closing operation is smooth, and when the door panel 2 is extended and closed, both locks are locked. Since the convex portion 8 is in the locked state by being inserted into the locking recess 7, the flat state of the door panel 2 extended to the door panel 2 is maintained, and the door panel 2 is reliably closed.

Further, the bifold door shown in FIGS. 3 and 4 is also an embodiment of the present invention.

The bifold door is of a downward support type, and the upper and lower runners 4, 4' are all formed as sliding guide pins, and each runner 4, 4' has a synthetic resin sliding ring 12, 12, respectively. ' is inserted into the lower sliding ring 12,
12' is interposed between the lower end surface of the door panel 2 and the upper end surface of the lower groove rail 6 to support the load of the door panel 2.

Further, each runner 4, 4' protrudes due to the elasticity of a spring body 10 housed in the door panel 2, and each runner 4, 4' serves as a locking convex portion 8, so that the upper groove Locking recesses 7 are provided at both ends of both the rail 5 and the lower groove rail 6, respectively.

The locking recess 7 is provided by fixing end blocks 13 made of synthetic resin to the ends of the upper groove rail 5 and lower groove rail 6, which are extrusion molded products.

Therefore, this bifold door also exhibits the same effects of the present invention as those of the above embodiments.

As mentioned above, the bifold door of the present invention has runners protruding from both upper and lower ends of both side edges of the door panel which can be freely folded at the center, and each runner is engaged with the upper groove rail and the lower groove rail so as to be freely movable. In this bi-folding door, a locking recess is provided on the inner wall of at least one of both ends of the upper groove rail and the lower groove rail, an inclined guide surface is formed inside the locking recess, and a runner on both side edges of the door panel is provided with a locking recess. Each door panel has a locking protrusion that protrudes removably from the locking recess, so it can be easily opened and closed from either edge of the door panel by attaching or detaching the locking protrusion on either side. At that time, the locking protrusion on the other side enters the locking recess and remains locked, and does not move as a fulcrum for opening and closing, so opening and closing operations are smooth, and the door panel can be extended. When the door panel is opened and closed, the locking protrusions on both sides are inserted into the locking recesses and locked, so the door panel maintains its stretched flat state and is securely closed. be.

[Brief explanation of drawings]

1 and 3 are front views showing different embodiments of the present invention, and FIGS. 2 and 4 are longitudinal sectional views of the embodiments shown in FIGS. 1 and 3, respectively. In the figure, 1 is the center, 2 is the door panel, 3 is the side edge,
4, 4' are runners, 5 is an upper groove rail, 6 is a lower groove rail, 7 is a locking recess, 8 is a locking protrusion, 9 is a vertical frame, 10 is a spring body, 11 is an inclined guide surface, 12.12' is sliding ring, 1
3 is an end block.

Claims (1)

[Scope of utility model registration request] In a bifold door, in which runners are provided protruding from the upper and lower ends of both side edges of a door panel that can be freely bent at the center, and each runner is engaged with an upper groove rail and a lower groove rail so as to be able to travel freely, the upper groove rail and the lower groove rail are A locking recess is provided in the inner wall of at least one of both ends, and an inclined guide surface is formed inside the locking recess, and on the other hand, elastic guides are provided on the runners on both side edges of the door panel so that the locking recess can be freely attached to and detached from the locking recess. A bi-fold door characterized by a protruding locking convex portion.