KR200321451Y1 - Automatic door closing device - Google Patents

Abstract

This paper is a device for automatically closing various doors, and more specifically, a device for automatically closing a door automatically using a spring, a speed adjusting bolt, hydraulic oil and air.

For this purpose, this paper makes the door close by using spring restoring force and the compression expansion of air contained in hydraulic flow rate, and slowly closes the door by using the flow of hydraulic oil, and adjusts the speed at which the door is closed by using the speed adjusting bolt. Use the speed adjusting bolt to adjust the final speed when the door is closed.

By using this device, the door is closed automatically by the spring and the door is closed slowly by the flow of hydraulic oil, so there is no need to close the door manually, and the door is closed slowly to prevent the door from being broken and noise. Not only can you control the speed, but if you open the door more than a certain angle, the door stays open.

Description

Automatic door closing device {Automatic door closing device}

This paper is a device that closes various doors automatically. More specifically, it is a device that automatically closes doors using spring, speed adjusting bolt, hydraulic oil and air in hydraulic oil.

In general, the automatic door closing device using a link on the cylindrical body or the automatic door closing device installed vertically is used to automatically close the door. However, the automatic door closing device using the link on the cylindrical body is too heavy and complicated, so it is not good and small. It was difficult to apply to light or light doors, and it was inconvenient to stop the door by manually operating the stop bar attached to the door to keep it open when the door was opened more than an angle. The door was not closed and the installation was inconvenient.

The present invention uses a spring, a speed adjusting bolt, hydraulic oil and air to solve the above problems, the shape of the pneumatic cylinder to be applied to small to large doors, and when the door is opened at any angle The purpose of this article is to keep it open and to improve the aesthetics after installation. To achieve this purpose, the present invention uses compressed spring hydraulic oil and air to automatically close the door, and when the door is opened at an angle more than a torsion spring (torsion) to keep the door open and increase the closing force. Spring), the speed adjusting bolt is used to control the speed of closing the door, and the fine speed adjusting bolt is used to adjust the final speed when the door is closed.

1 is a perspective view according to the present invention

2 is an internal structure diagram according to the present invention

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a cross-sectional view taken along line C-C of FIG.

5 is an enlarged view of a portion B of FIG.

6 is an enlarged view of a portion E of FIG.

7 is a sectional view taken along the line D-D of FIG. 5 and D'-D 'of FIG.

8 is an enlarged view of part number 8a 8b of FIG.

Fig. 9 is a view of the present article installed on the door (front view from the front)

Figure 10 is a view of installing this product on the door (top view from above)

Figure 11 is a view when opening the door to install the product (top view from above)

<Explanation of symbols for main parts of drawings>

1: cylinder 2: piston

3: piston rod 4: spring a

5: Spring b 6: Wall fixing device

7: Door fixing device 8a: Speed adjusting bolt

8b: Fine Speed Control Bolt

Hereinafter, described in detail by the accompanying drawings as follows. In this case, a piston having a wall fixing device 6 having a spring b 5 mounted thereon is assembled at one end of the cylinder 1 and having a hole 2a having a ball 2b mounted therein. 2) and spring a (4) are built-in, piston rod (3) is attached to piston (2), and door fixing device (7) is assembled at one end of piston rod (3) and cylinder (1) and both sides At the end, the speed adjusting bolt 8a and the fine speed adjusting bolt 8b are assembled, and the cylinder chambers 1a and 1b are filled with hydraulic oil together with some air. Reference numerals 20a, 20b, and 20c are seals and 1d, 1e, and 1f are oil holes.

When the door 10 is opened in FIG. 10, the main tooth formed of the above components compresses the spring a 4 by pushing the piston 2 and the piston rod 3 to the right in FIG. 2. At this time, the ball 2b of the hole 2a is pushed to the left side in FIG. 4 so that the hydraulic oil in the cylinder room 1a quickly exits the cylinder room 1b. At this time, when the hydraulic flow rate exiting the cylinder chamber 1a flows into the cylinder chamber 1b, a small amount of air contained in the cylinder is compressed to match the hydraulic flow volume by the volume of the moved piston rod 3. 10) When opened more than an angle, the spring b (5) allows the door to be opened even if a person touches it from the door, while the door is open, the person closes the door 10 or the door is below an angle. When the person releases the door 10 in the open state, the door 10 is closed while the piston 2 and the piston rod 3 are pushed to the left by the restoring force of the spring a 4 and the spring b 5 in FIG. 2. At this time, the ball (2b) of the hole (2a) in Figure 4 so that the door 10 is closed slowly The hydraulic oil is pushed to the right by the flow of the hydraulic oil, and the hole 2a is closed, and the hydraulic oil slowly flows from the cylinder chamber 1b to the cylinder chamber 1a through the oil hole 1e (1f) long hole 1c and the oil hole 1d. At this time, a small amount of air in the cylinder expands as much as the volume of the piston rod moved, and lifts the speed adjusting bolt 8a to adjust the speed at which the door closes and finely adjusts the speed of closing at the last. Turn the speed adjusting bolt 8b to adjust, that is, the piston which the door is closed moves to the left, and the piston 2 moves to the oil hole 1f position and is controlled by the speed adjusting bolt 8a and the oil hole 1f. After passing through), it is controlled by the micro speed adjusting bolt (8b).

As described above, when the door is closed slowly by using the flow rate of the spring and hydraulic oil, and the door is opened at a certain position or more, the door is not closed but remains open, and when the door is opened within a certain position, the door is automatically closed slowly and above a certain position. When the door is open and a person closes the door a little, the door closes slowly and automatically adjusts the speed at which it closes, and the speed can be finely adjusted until the door is completely closed just before the last close and keeps the door long without impacting the door. It can be used and prevents noise, and its simple structure makes it light in weight, good in appearance and can be applied to small to large doors.

Claims (3)

The spring a (4) is mounted to give the energy to close the door in the cylinder (1), and when the door is opened above a certain position, the spring does not close when the door is opened and the spring b (to the wall fixing device 6) to increase the closing force. 5) The speed adjusting bolt 8a and the fine speed adjusting bolt 8b are mounted at one edge of the cylinder 1 to adjust the speed at which the door is closed and the piston rod 2 and the piston rod 3 side to side Automatic door closing device characterized in that the hydraulic oil is filled with a small amount of air inside the cylinder to move. The automatic door closing device according to claim 1, wherein the spring a (4) is a compression spring. Automatic closing device according to claim 1, characterized in that the spring (5) is a torsion spring (torsion spring).