JPS6116374Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a structure to prevent reverse folding of a bifold door.
The gist of this is that a bifold door 2 is suspended on a groove-shaped rail 1 with an opening at the bottom along the longitudinal direction.
A locking portion 3 that is biased upward is projected from the upper surface of the bifold door 2, and a roller 11 provided at the upper end of the locking portion 3 is fitted into the opening 4 on the lower surface of the rail 1. A doorstop piece 5 that can freely roll in the width direction of the rail 1 and is brought into contact with the side surface of the locking part 3 from the doorstop side edge of the lower opening 4 of the rail 1.
The bifold door has a structure that prevents it from folding in reverse.

Conventionally, as shown in FIG. 1, the doorstop part 5' is suspended from the edge of the lower surface of the rail 1' on the doorstop side, and the doorstop part 5' is brought into contact with the bifold door 2.
This prevents the bifold door 2 from folding backwards. Therefore, the height h' of the door stop portion 5' is higher than the distance between the lower surface of the rail 1' and the upper surface of the bifold door 2', making it more noticeable. As shown in Fig. 2, the size of the side wood 6' was unbalanced and the appearance was poor.

This invention was made in view of the drawbacks of the conventional example mentioned above, and its purpose is that the height of the door stop piece is low and unnoticeable, and when it is hidden with side wood on both sides of the rail, the same side To provide a reverse folding prevention structure for a bifold door that can use wood and improve its appearance.

The present invention will be explained in detail below with reference to the accompanying drawings. Reference numeral 2 designates a bifold door with two door panels 7 hinged to each other, and rollable runners 8 are attached to both ends of the upper surface, respectively, and a locking portion 3 is provided approximately in the center of the upper surface.
As shown in FIG. 3, the locking part 3 has a roller 11 rotatably supported on the upper end of a roller receiver 10 whose lower part is vertically movably delivered into a recess 9 on the upper surface of the door panel 7. The roller 11 is capable of rolling freely in the width direction of the rail 1, and a spring 12 urges the locking portion 3 to protrude upward, and a retaining receiving portion 13 protrudes laterally from the lower end of the roller receiver 10. is locked to the stepped portion 14 in the recess 9 to lock the locking portion 3.
We have taken steps to prevent this from happening. The rail 1 is in the form of a groove with a bottom opening along the longitudinal direction, and tracks 15 are formed on both sides of the bottom opening 4, and a doorstop piece 5 is integrally suspended from the edge of the bottom opening 4 on the doorstop side. I've let it happen. However, the bifold door 2 has a runner 8
is placed on the track 15 and suspended from the rail 1. When the locking part 3 is raised to the uppermost position, the center of the roller 11 is located below the bottom surface of the rail 1, and the locking part 3 is located in the bottom opening 4 of the rail 1. In the fitted state, the lower end of the door stop piece 5 is located below the center of the roller 11, and the height h of the door stop piece 5 is between the lower surface of the rail 1 and the upper surface of the bifold door 2. is shorter than the interval between Therefore,
When the folded bifold door 2 is extended,
The locking part 3 hits the bottom surface of the rail 1 and is slightly retracted, and at the same time as it fits into the bottom opening 4, the side surface of the roller 11 of the locking part 3 comes into contact with the doorstop piece 5, causing the bi-folding door 2 to reversely fold. is prevented.

When hiding both sides of the rail 1 with side wood 6, since the doorstop piece 5 is short and inconspicuous, it can be hidden in a well-balanced manner using the same side wood 6 as shown in FIG.

The one shown in FIG. 5 is another example of the present invention, in which a slope 16 is applied to the corner portion of the lower surface of the rail 1 on the side where the bifold door 2 enters and exits, and a roller 11 is formed on the surface of the doorstop piece 5 that comes into contact with the roller 11. A curved surface 17 having a curvature approximately equal to the curve of the roller 11 is provided, and a curved surface 18 having a curvature approximately equal to the curve of the roller 11 is also provided at the edge of the lower opening 4 on the side from which the door stop piece 5 is not suspended.

As described above, this device involves hanging a bi-fold door on a groove-shaped rail that is open on the bottom along the lengthwise direction, and having a locking part that is biased upward protruding from the top of the bi-fold door, and a roller attached to the upper end of this locking part that fits into the bottom opening of the rail and is free to roll in the width direction of the rail, and a door stop piece that hangs down from the edge of the door stop side of the bottom opening of the rail to abut against the side of the locking part, so that the bi-fold door can be extended or folded to fit the locking part into the bottom opening of the rail or released. When the rollers roll along the underside of the rail, the locking part is smoothly and lightly locked and unlocked from the underside opening of the rail. Moreover, when the rollers roll lightly along the underside of the rail, when fitting the rollers of the locking part into the underside opening of the rail, the rollers tend to go past the underside opening of the rail and the bi-fold door is likely to fold backwards. However, in this device, the rollers come into contact with the door stopper piece hanging down from the edge of the underside opening of the rail, preventing the locking part from going too far. In addition, the height of the door stopper piece can be shorter than the distance between the underside of the rail and the top of the bi-fold door, making it less noticeable, and when both sides of the rail are hidden by side pieces, the same side pieces can be used to hide them in a balanced manner, which has the advantage of a good appearance.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway sectional view of the conventional example, Fig. 2 is a schematic sectional view showing the side surface of the same rail hidden by side wood, and Fig. 3 is a partial view showing an embodiment of the present invention. 4 is a partially cutaway perspective view showing the same bifold door as above; FIG. 5 is a partially cutaway sectional view showing another example of the present invention; FIG. 6 is a side view of the same rail. FIG. 2 is a schematic cross-sectional view showing a state in which the front panel is hidden by side wood. 1...Rail, 2...Bifold door, 3...Locking part, 4...Bottom opening, 5...Door stop piece, 11...
roller.

Claims (1)

[Scope of utility model registration request] A bi-fold door is hung from a groove-shaped rail that is open on the bottom along the longitudinal direction, a locking part that is biased to protrude upward is attached to the top surface of the bi-fold door, a roller provided at the upper end of the locking part is fitted into the bottom opening of the rail and the roller is free to roll in the width direction of the rail, and a door stop piece is hung from the edge of the door stop side of the bottom opening of the rail to abut against the side of the locking part.