JPS6340615Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a locking device for a bifold door in which a bifold door panel is folded into an opening frame so that it can be opened and closed. By attaching and detaching it to the frame groove rail, it can be locked and unlocked easily and reliably, and when the lock pin is removed from the upper frame groove rail and unlocked, only the latch wheel is attached to the upper frame groove rail. The bifold door panel is elastically locked in a removable manner to the rail, and the bifold door panel is smoothly and stably extended and closed.Furthermore, the lock case can be screwed up and down to change the amount of protrusion of the latch wheel. Furthermore, since the upper frame groove rail that suspends and supports the bifold door panel also serves as the upper end of the lock pin and the latch receiving part of the latch wheel, the number of parts is small and manufacturing is simple. To provide a bi-fold door locking device.

Hereinafter, the present invention will be explained based on the drawings.

The locking device for a bifold door shown in FIGS. 1, 2, and 3 is an embodiment of the present invention, and includes a cylindrical locking device that is opened upward at the upper end of the bifold door panel 1 near the center bending portion 2. A lock case 3 is screwed together so as to be able to move up and down, and a latch box 5 having latch wheels 4 on both sides and opening upward is provided inside the lock case 3.
A spring body 6 is interposed below the latch box 5 to cause the latch wheel 4 to project upwardly, and the inner surface of the lock case 3 and the outer surface of the latch box 5 are removably locked to each other. A locking step 7, 7' is provided, and a locking pin 8 is accommodated in the latchbox 5 so as to be slidable up and down. It is connected to the operating mechanism 10 by passing through the latch box 5 and the lock case 3, so that the upper end of the lock pin 8 and the latch wheel 4 are removably engaged with the upper frame groove rail 11 that suspends and supports the bi-fold door panel 1. This is what was done. The bi-folding door panel 1 has running tools 1 provided at the upper ends of both side edges 12, 12'.
3 and 13' are slidably locked and suspended from the upper frame groove rail 11, and running tools 13 and 1 are provided at the lower end.
3' is slidably locked on the lower frame groove rail 14, and on the running tools 13 at both the upper and lower ends of one side edge 12,
As shown in FIG. 4, stoppers 15 which are slidably screwed onto the upper frame groove rail 11 and the lower frame groove rail 14 are abutted so that the door can be opened and closed from the other side edge 12'. It is provided within the frame 16 so that it can be folded and opened and closed, and therefore,
Move the stopper 15 and move the running tool 1 on the opposite side.
3', it can be easily changed so that it can be opened and closed from the opposite side edge 12.
The lock pin 8 is pushed up by the cam body 17 of the operating mechanism 10 and pulled down by the resilience of the spring 6', and is rotated by rotating the knob body 18 that interlocks with the cam body 17. It slides up and down. A flange-shaped piece projecting inward is formed on the upper edge of the lock case 8, and this flange-shaped piece serves as the locking step 7, and a flange-shaped piece protruding outward is formed on the lower edge of the latch box 5. A piece is formed, and the collar-like piece becomes the locking step 7',
In addition, a soft packing material 1 is attached to the bottom of the lock case 8.
9 is attached, and the connecting rod 9 of the lock pin 8 is held by the soft packing material 19 so as to prevent it from rattling and to slide smoothly. Therefore, in the bifold door lock device, by rotating the knob 18 of the operating mechanism 10 to attach and detach the upper end of the lock pin 8 that is locked to the upper frame groove rail 11, It can be locked and unlocked easily and reliably, and when the lock pin 8 is removed from the upper frame groove rail 11 and the lock is unlocked, only the latch wheel 4 comes into elastic contact with the upper frame groove rail 11 in a detachable manner. When locked, the bifold door panel 1 is smoothly extended and closed in a stable and stationary state, and the lock case 3 is rotated and the screws are operated up and down to change the amount of protrusion of the latch wheel 4. An upper frame groove rail 1 that can adjust the handedness and also suspends and supports the bifold door panel 1.
1 serves as the upper end of the lock pin 8 and the locking receiving part of the latch wheel 4, which not only simplifies manufacturing with a small number of parts but also allows the door frame 1 to
Even if lock pin 8 is installed in a distorted manner, lock pin 8
Since the latch wheel 4 is latched to the upper frame groove rail 11, the locking and latching functions described above are fully exhibited.

In addition, in the locking device for a bifold door of the present invention, as in the embodiment shown in FIGS. 5 and 6, a vertically elongated hole is bored in the outer wall of the lock case 3, and the locking device engages with the vertically elongated hole so as to be able to slide up and down. Alternatively, a guide pin may be provided protruding from the outer surface of the latch box 5, and the upper edge of the vertical hole may serve as the locking step 7, and the guide pin may serve as the locking step 7'.

As mentioned above, in the bifold door locking device of the present invention, by operating the operating mechanism to attach and detach the upper end of the lock pin to the upper frame groove rail,
It can be locked and unlocked easily and reliably, and when the lock pin is removed from the upper frame groove rail and the lock is unlocked, only the latch wheel is removably engaged with the upper frame groove rail. , the bi-folding door panel can be smoothly extended and closed in a stable and stationary state, and the lock case can be screwed up and down to change the amount of protrusion of the latch wheel to adjust the degree of latch control. Since the upper frame groove rail that suspends and supports the folding door panel is also used as the upper end of the lock pin and the latch receiving part of the latch wheel, the number of parts is small and manufacturing is simple.

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the present invention;
3, 4 are sectional views of the main parts of the same embodiment, and FIGS. 5 and 6 are sectional views of the main parts of another embodiment. In the figure, 1 is a bifold door panel, 2 is a central folding part, 3 is a lock case, 4 is a latch wheel, and 5 is a lock case.
is a latch box, 6 is a spring body, 7 and 7' are locking steps, 8 is a lock pin, 9 is a connecting rod, 10 is an operating mechanism, 11 is an upper frame groove rail, 12 and 12' are side edges,
13, 13' are running tools, 14 is a lower frame groove rail, 1
5 is a stopper, 16 is a door frame body, 17 is a cam body, 18 is a knob body, and 19 is a soft packing material.

Claims (1)

[Scope of utility model registration request] A cylindrical lock case with an upward opening is screwed onto the upper end of the bi-folding door panel near the center bending part, and is movable up and down. The latch box is housed in a slidable manner, and a spring body is interposed below the latch box to cause the latch wheel to spring upward, and a locking step is provided on the inner surface of the lock case and the outer surface of the latch box to removably lock each other. A lock pin is housed in a latch box so as to be able to slide up and down, the upper end of the lock pin protrudes above the latch box so that it can move forward and backward, and the lower end is extended to pass through the latch box and lock case and connect to the operating mechanism. A locking device for a bi-fold door in which a latch wheel is removably latched to an upper frame groove rail that suspends and supports a bi-fold door panel.