JPS5929104Y2 - Pull-down door mounting device - Google Patents

Description

[Detailed description of the invention] This invention relates to a device for attaching a pull-down door to be attached to a storage box, a shelf, a window of a building, etc. The hinge and locking mechanism are simplified to make the opening and closing operations of the door smooth and easy. The purpose is to allow the door to be easily attached and detached.

In this embodiment, a pull-down door 2.2 is attached to a pair of opposing side walls of a transport container/article storage box 1 made of press-formed steel plate, and a hinge shaft pin 3 is attached to the lower part of both sides of the door 2, and a hinge shaft pin 3 is attached to the upper part of the door 2. Lock pins 4 are provided in a protruding manner.

and a slot 6 on the front side of the door frame 5 through which each of the pins 3.4 passes;
7. Furthermore, pin drop grooves 8 and 9 communicating with the slots 6 and 7 are provided on the inner surface of the door frame 5.

The distance between the upper and lower slots 6 and 7 is shorter than the distance between the lock pin 4 and the hinge shaft pin 3.

That is, the lower hinge shaft pin recess groove 8 is longer than the upper lock pin recess groove 9.

To explain how to install the door plate 2, as shown in FIG. It is hinged by falling along the groove 8 as shown by the chain line 2''.

In the middle of dropping the shaft pin 3, raise the door plate 2 and insert the lock pin 4 into the upper slot 7 as shown by the solid line in Figure 3. When the lock pin 4 is lowered as shown by the chain line, the door plate 2 is in the closed state. is maintained.

To open the door, the door plate 2 is pulled up from the position 2 shown by the chain line in FIG. 3 to the position shown by the solid line, and the lock pin 4 is aligned with the slot 7.

At this time, the shaft pin 3 is inserted into the slot 6 due to the length of the vertical groove 8.
does not match.

In this state, the door plate 2 is pulled down as shown in FIG. 4, and the shaft pin 3 does not rotate within the vertical groove 8, but slides down to the bottom of the groove.

Reference numeral 10 serves as a stopper for keeping the opening angle of the door plate 2 horizontal as shown in FIG.

Numeral 11 is a protrusion that prevents the shaft pin 3 from coming up inadvertently when the door plate 2 is started to be pulled down after unlocking. (See Figure 2), if the door is pushed a little forcefully downward, the groove width will be widened by the slight elasticity of the protrusion 11 and the groove wall, making it easy to drop the door.

To remove the door, the door is unlocked and pulled upward against the protrusion 11 in a slightly open state, aligning the shaft pin 3 with the slot 6 and removing it.

Since the door mounting device cited in this proposal has the above configuration, it is only necessary to provide a pin and a groove into which the pin is placed on the opposing surfaces of the door and door frame, and further provide a pin insertion/removal slot connected to the groove on the front surface of the door frame. The simple structure provides a hinge mechanism that opens and closes smoothly and can be easily attached and detached as needed, and a locking mechanism that is easy to engage and disengage.

[Brief explanation of the drawing]

Figure 1 is a perspective view of an article storage box with a pull-down door attached using the device of the present invention, Figure 2 is a vertical sectional view showing how to connect the hinge shaft pin, Figure 3 is a perspective view of the door in the unlocked state, Figure 4 is a longitudinal sectional view of the hinge shaft, and Figure 5 is a slope view of the door in its open state. 1 is a box, 2 is a sliding door, 3 is a hinge shaft pin, 4 is a lock pin, 5 is a door frame, 6 and 8 are slots for the hinge shaft pin and a pin drop groove, 7 and 9 are grooves for the lock pin Hole and pin drop groove, 10 is a stopper.

Claims (1)

[Scope of utility model registration request] A hinge shaft pin is made to protrude from the lower part of both sides of the door plate, a lock pin is made to protrude from the upper part, and slotted holes are provided in the front of the door frame for the pins to pass through, and furthermore, a pin droplet is communicated with the slotted holes. A groove is provided on the inside surface of the door frame, and the distance between the upper and lower grooves is made shorter than the distance between the lock pin and the hinge shaft pin.
Make the lower hinge shaft pin recess groove longer than the upper lock pin recess groove, and place it behind the hinge shaft pin recess groove.
A pull-down door mounting device equipped with a stopper that maintains the horizontal opening angle of the door plate.