JPS6030395Y2 - bifold door - Google Patents

Description

[Detailed description of the invention] This invention relates to a bi-folding door, more specifically to the opening/closing structure of a bi-folding door, and its main purpose is to reduce resistance for a short period of time until the door is completely closed. The purpose is to prevent the door from closing violently, which can be called a collision, as would occur when the door closes suddenly.

Conventionally, there is a system that uses a spring to keep the door completely closed and prevent it from returning open, which is called springback. Since the runner is only provided with a small length, if the door is forcefully closed, the runner will jump over this spring and collide with the side frame.

The present invention has been devised in view of the above points, and will be described in detail below based on the embodiments shown in the drawings.

The bifold door 1 has two panels 2, 2 which are pivotally connected by a hinge 3, and each runner 5, which is horizontally rotatably attached to a pin 4 protruding from the upper surface of the outer end of each panel 2, is mounted on the lower surface. A guide that is movably mounted on the lower horizontal piece 7 of the upper rail 6 having a cross-sectional shape open at the center in the width direction, is suspended and supported by the upper rail 6, and protrudes from the lower surface of the outer end of each panel 2. pin 8
The pins 4 and guide pins 8 of one panel 2 are fixed at the ends of the upper rail 6 and lower rail 9 by stoppers 11, respectively, so that the pins 4 and the guide pins 8 of one panel 2 can be moved freely into the lower rail 9 and arranged in the opening frame 10. As one panel 2 rotates using this pin 4 and guide pin 8 as fulcrums, the runner 5 of the other panel 2 runs on the upper rail 6, and the bi-folding door 1 opens. It is opened and closed.

The runner 5 is a bearing 5 that is horizontally rotatably connected to the pin 4.
a and rollers 5b that are vertically rotatably attached to both ends of the bearing 5a, and the rollers 5b roll on the lower horizontal piece 7, and the runner 5 on the fixed side and the upper rail on the opposite side. 6
A long leaf spring 12 with which the runner 5 comes into elastic contact is arranged inside the end portion.

This leaf spring 12 is curved in an arcuate shape, and as shown in FIG. The rollers 5b of the runner 5 are in contact with each other and are disposed in a length range corresponding to several rotations of the rollers 5b of the runner 5 from the end of the upper rail 6 toward the center, and while the runner 5 passes through this area, the bearings 5b A convexly curved surface 13 formed on the upper surface comes into elastic contact with the leaf spring 12 so that the runner 5 moves forward while bending the leaf spring 12.

That is, when closing the door, the runner 5 advances from the free end of the leaf spring 12 onto the leaf spring 12, as shown in FIG.
After rotating several times, it leaves the leaf spring 12 and fits into the space 14 between the fixed end of the leaf spring 12 and the side end of the upper rail 4.
The door will close completely.

As described above, in the present invention, a long spring plate is placed at the end of the upper rail, and the runner makes elastic contact with the plate spring while the runner rotates several times before the door closes. , before the door is completely closed, it receives resistance from the leaf spring and the force to close the door increases, making it possible to avoid applying the brake when closing the door, and preventing the door from closing suddenly or violently. There is an advantage.

In addition, the leaf spring is made longer so that the brake gradually stops working while the runner's roller rotates several times, so even if the elastic contact force of the leaf spring is weak, the brake can not be applied effectively. This has the advantage that the impact force between the runner and the runner can be reduced.

In other words, if the elastic contact force of the leaf spring to the runner is strengthened, the brake will work effectively, but the impact force between the runner and the leaf spring will be increased.On the other hand, if the elastic contact force of the leaf spring to the runner is weakened, the above impact force will be increased. Although there is a dilemma that the braking effect becomes worse even though the brake force becomes smaller, the above-mentioned dilemma can be solved by making the leaf spring longer in the invention of the present invention.

Furthermore, the leaf spring is attached to one end of the upper rail corresponding to the runner, and makes elastic contact with the protruding curved surface protruding from the bearing of the runner, so the leaf spring does not come into contact with the roller when closing the door. This has the advantage that the runner is decelerated without interfering with the transfer of the rollers, there is no wear or deformation of the rollers, and the lifespan is extended.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front sectional view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line X-X in Fig. 1, Fig. 3 is a partially cutaway top view of the same, and Fig. 4 a, b, and c are explanatory diagrams of the same operation as above, and FIG. 5 is a longitudinal cross-sectional view of the same as above, where 1 is a bifold door, 2 is a panel, 4 is a pin, 5 is a runner, 6 is an upper rail, 12
is a leaf spring.

Claims (1)

[Scope of utility model registration request] Two panels are pivotally connected, and a pin protruding from the upper surface of the outer edge of one panel rotatably engages with the longitudinal end of the upper rail, and a pin protruding from the upper surface of the outer edge of the other panel. A rotatably attached runner engages with the upper rail so that it can run freely, so that both panels are suspended and supported, and a runner is attached to one end of the upper rail corresponding to the runner running on the upper rail over almost its entire length. A long leaf spring is installed with one end fixed to the side end of the upper rail so that it comes into elastic contact with the curved surface protruding from the bearing of the runner. A bi-fold door that extends for a length equivalent to several rotations of a roller.