JPS6350364Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pivot device for a top-hung bifold door, and more specifically, a pivot device 3 protrudes into the lower rail groove 2 from the lower surface of both ends of the bifold door 1.
An inner flange 4 is provided at the upper end of the lower rail groove 2, and this inner flange 4
A hook portion 5 located below is provided at the lower end of the pivot 3 so as to protrude laterally, and the upper surface of the hook portion 5 is formed into a protruding curved surface 6 such that the longitudinal center portion of the lower rail groove 2 protrudes upward. Then, the pivot 3 is pulled upwardly by the spring 14 and the hook 5 is attached to the lower surface of the inner flange 4.
This relates to a pivot device for a top-hung bi-folding door which is made of a top surface that is in elastic contact with the top surface of the door.

In the case of a conventional pivot device for a top-hung two-fold door, as shown in FIG. is formed, and this hook portion 5' is located below the inner flange 4 of the lower rail groove 2. However, when folding the bi-folding door 1 as shown in FIG. 2, as shown in FIG. The corner of the hook part 5' hits the inner flange 4, and the hook part 5 cannot smoothly slide on the lower surface of the inner flange 4, making it difficult to operate the bifold door 1.

The present invention has been made in view of the above points, and its purpose is to provide a pivot device for a top-hung bifold door in which the hook portion can smoothly slide on the lower surface of the inner flange. There is something to do.

Hereinafter, the present invention will be explained in detail based on examples. 1
is a two-fold door formed by pivoting a pair of door bodies 7, and is suspended from an upper rail 8 via a runner 9. Pivots 3 located in the lower rail groove 2 are protruded from the lower surface of both ends of the bifold door 1. A hook portion 5 is provided protruding from the lower end of the pivot 3 toward the width direction of the lower rail groove 2. Pivot 3
is rotatably attached to the bifold door 1. Therefore, by folding the bifold door 1 as shown in FIG. 5b, the center of gravity of the bifold door 1 moves away from the lower rail groove 2, and the bifold door 1 swings in the opposite direction to the folding direction. Also, the hook portion 5 is locked by the inner flange 4 of the lower rail groove 2, and the pivot 3 does not come off from the lower rail groove 2. A protruding curved surface 6 is formed on the upper surface of the hooking part 5 of the pivot 3, and the protruding curved surface 6 is formed such that the central portion in the length direction of the lower rail groove 2 protrudes. As will be explained in detail later, the pivot 3 is pulled upwardly by the spring 14 so that the convex curved surface 6 on the upper surface of the hook portion 5 comes into elastic contact with the lower surface of the inner flange 4 of the lower rail groove 2. There is. Therefore, even if the bifold door 1 is tilted by folding, the protruding curved surface 6 of the hook portion 5 will come into contact with the lower surface of the inner flange 4 of the lower rail groove 2, as shown in FIG.
The hook part 5 can move in the length direction of the lower rail groove 2 while sliding on the inner flange 4. In addition, an accordion door may be constructed by pivotally supporting and connecting a plurality of bifold doors 1. 7 and 8 show a structure in which the pivot 3 is attached to a pivot cap 10 fixed to the side end surface of the bifold door 1. FIG. A pivot 3 is housed in the cylindrical groove 11 of the cap 10, and the lower end of the pivot 3 is fitted with an L-shaped mounting bracket 12.
It protrudes from the through hole 13 of. The pivot 3 is urged upward by a compression spring 14 so that the hook 5 comes into elastic contact with the inner flange 4 of the lower rail groove 2. The L-shaped mounting bracket 12 is attached to the cap 10 and the bifold door 1 with screws 15.
Incidentally, the runner 9 is also attached to the cap 10 in the same manner.

As described above, in the present invention, the upper surface of the hook part is formed into a convex curved surface in which the central part in the length direction of the lower rail groove protrudes upward. Even if the rail swings and tilts, the protruding surface of the hook will come into contact with the inner flange of the lower rail groove.
Therefore, the hook can slide smoothly on the inner flange, making it easier to operate the bifold door. In addition, the pivot is pulled upward by a spring and urged so that the upper surface of the hook is in elastic contact with the lower surface of the inner flange, so the hook is always in sliding contact with the lower surface of the inner flange and the hook is inside. This allows the pivot to run smoothly and quietly without the risk of impact or rattling noise that would occur when it touches or separates from the flange. Even though the top surface of the hook part is a convex curved surface as mentioned above, even if the bifold door swings and the pivot is tilted, it can still slide smoothly. .

In addition, since the protruding curved surface of the hook part slides in line contact with the inner flange, it can slide smoothly even when a relatively large force is applied to the pivot, and the wear of the contact part is reduced, making it durable for long-term use. It has the effect of being able to

[Brief explanation of drawings]

Figure 1 is a perspective view of the conventional example, Figures 2a and b are explanatory views of the same operation as above, Figure 3 is an enlarged sectional view of section A in Figure 2b, and Figure 4 is a perspective view of the embodiment of the present invention. Figures 5a and 5b are explanatory views of the same operation as above, Figure 6 is an enlarged sectional view of section B in Figure 5b, Figure 7 is a perspective view of another embodiment of the present invention, and Figure 8a , b, and c are a broken side view, a front sectional view, and a plan sectional view of the same as above, in which 1 is a bifold door, 2 is a lower rail groove, 3 is a pivot, 4 is an inner flange, 5 is a hook part, 6 is a protruding curved surface, and 14 is a spring.

Claims (1)

[Scope of utility model registration request] A pivot protrudes from the lower surface of both ends of the bifold door into the lower rail groove, an inner flange is provided at the upper end of the lower rail groove, and a hook located below the inner flange is protruded laterally from the lower end of the pivot. The upper surface of the hook part is formed into a protruding curved surface in which the center part in the length direction of the lower rail groove protrudes upward, and the pivot is pulled up and biased upward by a spring, and the hook part is attached to the lower surface of the inner flange. A pivot device for a top-hung bi-folding door that is made of elastic contact on the top surface.