KR200340473Y1 - Automatic door closing device - Google Patents

Abstract

This paper is a device to close various doors automatically. More specifically, it is a device to close the door automatically by using spring, hydraulic oil, air, speed adjusting bolt and force adjusting bolt.

For this purpose, this paper uses the restoring force of the spring and the compression and expansion of the air contained in the hydraulic oil and the hydraulic flow rate to close the door, to keep it open when the door is opened over a certain angle, and to use the speed adjusting bolt to close the door. It adjusts the strength of the closing force of the door by making it easy to install when the device is installed on the door using the force adjustment bolt.

By using this device, the door can be closed automatically by the spring and the hydraulic oil containing a small amount of air, and the closing force and speed of the door can be adjusted. Stay open.

Description

Automatic door closing device {Automatic door closing device}

This paper is a device to close various doors automatically. More specifically, it is a device to close the door automatically by using spring, hydraulic oil, air in hydraulic oil, speed adjusting bolt and force adjusting bolt.

Automatically closing the door Conventionally, as shown in FIG. 2, a spring 51 is mounted inside the cylindrical body, and the force of the spring is closed using the automatic closing device through the gears 52, 53 and the link 54. However, the force of the spring (51) does not go directly to the door, but is transmitted to the door through gears and links. Therefore, a large amount of energy is lost, so a thick spring must be used. It was difficult to apply and it was inconvenient to stop the door by manually operating the stop bar on the door to keep it open when the door was opened at an angle.

The present invention uses the spring and hydraulic oil and air to solve the above problems, the shape of the pneumatic cylinder shape can be applied to small to large doors, so that the door remains open when the door is opened at any angle. The purpose of this paper is not only to control the closing speed of the door but also to control the closing force of the door and to improve the aesthetics after installation. In order to achieve this purpose, the present invention allows the door to close automatically, to keep the door open when the door is opened more than an angle, to adjust the closing speed of the door and to adjust the closing force of the door, spring, hydraulic oil, air, Speed adjusting bolt and force adjusting bolt were used.

1 is a perspective view of a conventional automatic door closing device

Figure 2 is an internal structure diagram of a conventional automatic door closing device

Figure 3 is a perspective view of the automatic door closing device according to the present invention

4 is an internal structure diagram of an automatic door closing device according to the present invention

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

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

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

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

9 is an enlarged view of a portion F of FIG.

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

11 is an enlarged view of part number 5a 5b of FIG.

Fig. 12 is a view of the present item installed on the door (front view from the front)

Fig. 13 is a view of the present item installed on the door (top view from above)

Figure 14 is a view when the door is installed with the present article 1 (top view from above)

Figure 15 is a view when opening the door to install the present design Figure 2 (top view from above)

<Explanation of symbols for main parts of drawings>

1: cylinder 2: piston

3: piston rod 4: spring

5a: speed adjusting bolt 5b: fine speed adjusting bolt

6: force adjusting bolt 7: wall fixing device

8: door lock 10: door

11: wall

Hereinafter, described in detail by the accompanying drawings as follows. In this case, the piston (2) and the spring (4) having a wall fixing device (7) is assembled at one end of the cylinder (1), and the hole (2a) in which the ball (2b) is mounted inside the cylinder (1). A piston rod 3 is attached to the piston 2, and a char screw 3a is formed at one end of the piston rod 3, and a force regulator 6 and a door side having a female screw formed therein. The fixing device 8 is assembled, the cylinder 1 is equipped with speed adjusting bolts 5a and 5b, and the cylinder chambers 1a and 1b are filled with hydraulic oil together with some air. Reference numerals 20a and 20b are oil seals, 1c, 1d, 1e and 1f are oil holes, and 30a, 30b and 30c are rotation centers.

When the door 10 is opened in FIG. 13, the main window formed of the above components pushes the piston 4 and the piston rod 3 to the right in FIG. 4 to compress the spring 4. At this time, the ball 2b of the hole 2a is pushed to the left side in FIG. 6 so that the hydraulic oil in the cylinder room 1a quickly exits the cylinder room 1b. At this time, when the hydraulic oil 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 rate by the volume of the moved piston rod 3. If the door is opened at an angle of more than one angle, the door is opened even if a person touches the door by the spring (4). That is, if the door is opened at an angle of more than the center of rotation (30c) as shown in Figure 15 If the direction of the connection line (30a) and the center of rotation (30b), that is, the center of rotation connection line 30 toward the wall (11), the force of the spring (4) is open, open the door within an angle to rotate as shown in The center 30c is the center of rotation 30a and the center of rotation ( 30b) on the opposite side of the wall 11 with respect to the connecting line of the center of rotation 30, the force of the spring 4 causes the door to be closed, while the door is open, a person closes the door 10 a little or When a person releases the door 10 while the door is opened at an angle or less, 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 4 in FIG. At this time, the ball 2b of the hole 2a is pushed to the right by the flow of hydraulic oil in FIG. 6 so that the door 10 closes slowly, and the hole 2a is closed, so that the oil holes 1e, 1f, 1c, and 1d. The hydraulic oil flows slowly from the cylinder chamber 1b to the cylinder chamber 1a through the cylinder) .At this time, a small amount of air in the cylinder expands by the volume of the moved piston rod, and the speed adjusting bolt 5a is turned to The closing speed of the door is controlled by adjusting the flow of hydraulic oil by increasing or decreasing the hole 1d. Turn the fine speed adjustment bolt (5b) to increase or decrease the oil hole (1e) to adjust the closing speed of the door. That is, when the door starts to close with the door open, the piston (2) will open the oil hole (1f). Until the position is reached, the closing speed of the door is adjusted according to the size of the oil hole 1d by the speed adjusting bolt 5a, and the oil hole 1e by the fine speed adjusting bolt 5b after passing through the oil hole 1f. Depending on the size, the last closing speed of the door is adjusted. Turning the force adjustment bolt (6) to the left or right side pulls the char screw (3a) formed at one end of the piston rod inwardly or pushes it to the bar to increase or decrease the closing force of the door. While installing the charcoal screw (3a) to the door fixing device (8) completely, fix the unit to the wall and the door. Then, turn the power adjustment bolt (6) to push the charcoal screw (3a) to the cylinder to close the door. It will make it easier to install because it is stronger.

As described above, this proposal uses the spring, hydraulic oil, air, speed adjusting bolt, and force adjusting bolt to close the door slowly, and when the door is opened more than a certain position, the door is not closed but remains open and opened within a certain angle. When the door is open at a certain angle or when the door is open, if a person closes the door a little, the door automatically closes slowly, the speed of closing the door can be adjusted, the strength of the door closing force can be adjusted, and the door is impacted when the door is closed. The door can be used for a long time without any noise, and it can prevent noise, and there is no need for a separate stop bar, and the structure is simple, which can lower the cost, and it is very easy to install, low in weight, good in appearance and can be applied from small to large door Can be.

Claims (3)

In the automatic door closing device applicable to the small door to the large door, a spring (4) is mounted inside the cylinder (1) to provide the closing energy to the door, and the piston (2) and the piston rod (3) 1) Automatic door closing device characterized in that the hydraulic oil containing a small amount of air is filled in the cylinder (1) in order to be able to move from side to side. The automatic door closing device according to claim 1, wherein a force adjustment bolt (6) is mounted at one end of the piston rod (3) to facilitate the installation of the device and to adjust the closing force of the door. The automatic door closing device according to claim 1, wherein a speed adjusting bolt (5a) and a fine speed adjusting bolt (5b) are mounted on the cylinder (1) to adjust the closing speed of the door.