JPS588851Y2 - bifold door locking device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a locking device for a bi-folding door, and its gist is that a bi-folding door A is formed by hinged wide door panels 2 on both outsides of a narrow intermediate panel 1. In addition, retaining grooves 4 and 4 opening inward are provided in the inner facing surface 3 of the wide door panel 2 facing the intermediate panel 1, and a rotating shaft 6 is provided in the intermediate panel 1 from the front side 1a toward the rear side 1b. At the same time, two lock arms 5, 5 are provided in a direction substantially perpendicular to the rotation shaft 6, and protrude in opposite directions from the rotation shaft 6, and the lock arms 5, 5 are engaged in the engagement grooves 4, 4. This is a locking device for a bi-fold door that consists of a combination of
To provide a bifold door lock device which is easy to fold, can be locked when the bifold door is extended, and is prevented from being folded.

Hereinafter, the present invention will be described in detail according to illustrated embodiments.

The intermediate panel 1 is a narrow panel having a substantially triangular cross section that gradually becomes narrower from the front surface 1a toward the rear surface 1b.

The wide door panel 2 is hinged to both outer sides of the intermediate panel 1, and the inner facing surface 3 of the wide door panel 2 facing the intermediate panel 1 is formed to be inclined from the front surface 2a toward the rear surface 2b. Engagement grooves 4 are recessed in the inner facing surface 3, respectively.

Further, a rotary shaft 6 is disposed on the intermediate panel 1 so as to be freely rotatable from the front surface 1a toward the rear surface 1b, and a handle 7 is fixed to a protruding end 6a of the rotary shaft 6 that protrudes from the front surface 1a of the intermediate panel 1. Two lock arms 5 are provided projecting from the rear end 6a of the rotating shaft 6 at substantially right angles to the rotating shaft 6.

The protruding directions of the lock arms 5 are opposite to each other.

This lock arm 5 may be integrally provided on the rotating shaft 6 as shown in FIG.
The back end 6b of the lock arm 5 is made into a prismatic shape, and a square hole (
(not shown), the rear end 6b may be inserted into this square hole, and the lock arm 5 may be constantly pressed forward by the spring 8.

9 is a large diameter portion of the rotating shaft 6.

The bifold door A, which is a lever, is arranged in an opening (not shown) so as to be foldable.

When locking the bifold door A, the bifold door A is extended as shown in FIG. 2, the rotating shaft 6 is rotated by the handle 7, and the lock arm 5 is fitted into the engagement groove 4.

In this way, even if the bifold door A is pushed to fold, the lock arm 5 acts as a resistance and prevents the bifold door A from being folded.

Further, at this time, the spring 8 always presses the lock arm 5 forward, and prevents the lock arm 5 from wobbling.

When folding bifold door A from the locked state, press handle 7.
When the lock arm 5 is removed from the engagement groove 4 by reversing the rotation and the bifold door A is pressed, the wide door panels 2 on both sides are folded around the intermediate panel 1.

As shown below, in this invention, a wide door panel is hinged to the outside of the narrow middle panel to form a bifold door, so if the middle panel is pressed or pulled, it can be folded into two. Since there is an intermediate panel in the center of the door, it can be folded and extended smoothly, and the bifold door can be opened and closed smoothly.Furthermore, the intermediate panel has a rotation axis that points from the front to the back. At the same time, two lock arms are provided in a direction substantially perpendicular to the rotation axis and protrude in opposite directions from the rotation axis, and a retaining groove that opens inward is recessed in the inner facing surface facing the middle panel of the wide door panel. However, since the lock arm is engaged in the engagement groove, the bifold door can be folded by rotating the rotating shaft and removing the lock arm from the engagement groove, and conversely, the bifold door can be extended. When the rotating shaft is rotated and the lock arm is engaged in the engagement groove, the lock arm acts as a resistance to prevent the bi-fold door from folding, and the bi-fold door can be manually locked.

[Brief explanation of drawings]

Fig. 1 is a front view of one embodiment of the present invention, Fig. 2 is a sectional view taken along the line XX shown in Fig. 1, Fig. 3 is an enlarged view of the Y section in Fig. 2, and Fig. 4
The figure is a front view of FIG. 3, and FIG. 5 is a cross-sectional view of another embodiment of the present invention, where 1 is an intermediate panel, 2 is a wide door panel, 3 is an inner facing surface of the wide door panel, and 4 is a retaining groove. , 5 is a lock arm, and 6 is a rotating shaft.

Claims (1)

[Scope of utility model registration request] Wide door panels are hinged to both outer sides of a narrow middle panel to form a bifold door, and retaining grooves opening inward are recessed in the inner facing surfaces of the wide door panels facing the middle panel. A rotating shaft is arranged on the panel from the front to the back, and two lock arms are provided in a direction substantially perpendicular to the rotating shaft and protrude in opposite directions from the rotating shaft, and the lock arms are engaged in the retaining groove. Bi-fold door locking device.