KR102402556B1 - Door closing device using mr fluid - Google Patents

Abstract

The present invention relates to a door closing device using MR fluid, and in particular, it is mounted on a front door where the installation of a door stopper is illegal, and the viscosity of the MR fluid injected into the door closer body is adjusted by a magnetic field. It relates to a door closing device using MR fluid, which can adjust the opening/closing speed of the door and fix it in a desired position.

Description

Door closing device using MR fluid {DOOR CLOSING DEVICE USING MR FLUID}

The present invention relates to a door closing device using MR fluid, and in particular, it is mounted on a front door where the installation of a door stopper is illegal, and the viscosity of the MR fluid injected into the door closer body is adjusted by a magnetic field. It relates to a door closing device using MR fluid, which can adjust the opening/closing speed of the door and fix it in a desired position.

In general, in door closers, when the door is opened, the piston returns along the operating chamber of the main body with the repulsive force of the compressed spring and rotates the rotation shaft meshed with the rack and pinion gears of the piston to close the door, and hydraulic oil on the other side of the piston is gradually discharged through the first flow path and the second flow path, so that the closing speed of the door is controlled.

On the other hand, recently, it is illegal to install a door stopper on the front door of an apartment according to the Fire Act. However, there are cases where it is necessary to open the front door under certain circumstances and for ventilation.

Therefore, it is necessary to open the front door and fix it at a desired position, and a door closing device capable of immediately closing the front door in case of a fire alarm is required.

[Patent Document 1] Korean Patent Registration No. 032982 (Title of Invention: Door Closer)

Therefore, the present invention has been made in view of the above, and an object of the present invention is to open the front door and fix it at a desired position, and to close the front door immediately when a fire alarm occurs, using MR fluid to close the door The purpose is to provide a device.

In order to achieve the above object, the door closing device using the MR fluid according to the embodiment of the present invention is mounted on the upper part of the door, and an operation chamber, a spring chamber, and first and second flow paths are formed, and the first flow path is a door closer body communicating with the spring chamber, wherein the second flow path is formed in the operation chamber; a spring disposed in the spring chamber; a piston disposed in the operating chamber and capable of being biased by the spring and having a rack gear formed on a periphery thereof; a rotation shaft on which a pinion gear gear-coupled to the rack gear is mounted and connected by a door frame and an arm; and an electromagnet built in a specific position of the door closer body (a position capable of supplying magnetic force to the spring chamber and the operation chamber) to generate magnetic force when power is applied; the spring chamber and the operation chamber are filled with MR fluid, , The MR fluid is solidified when the magnetic force generated by the magnetic force in the electromagnet is maximized, and the spring, the piston and the rotation shaft are fixed.

In the door closing device using the MR fluid according to the embodiment, when the magnetic force generated by the electromagnet is adjusted to a strength other than the maximum strength, the viscosity of the MR fluid may be changed and the speed of the door may be adjusted.

The door closing device using the MR fluid according to the above embodiment includes: a viscosity adjusting unit configured to adjust the viscosity of the MR fluid by setting the strength of the voltage applied to the electromagnet; a fire detection unit configured to detect the occurrence of a fire; and a control unit configured to apply the voltage set to the electromagnet based on the intensity of the voltage set by the viscosity control unit and the detection signal of the fire detection unit.

In the door closing device using the MR fluid according to the embodiment, the control unit may cut off the power applied to the electromagnet when a fire is detected through the fire detection unit.

According to the door closing device using MR fluid according to the embodiment of the present invention, it is mounted on the upper part of the door, an operation chamber, a spring chamber, and first and second flow paths are formed, and the first flow path communicates with the spring chamber, The second flow path may include a door closer body formed in an operation chamber; a spring disposed in the spring chamber; a piston disposed in the operating chamber and capable of being biased by the spring and having a rack gear formed on a periphery thereof; a rotation shaft on which a pinion gear gear-coupled to the rack gear is mounted and connected to a door frame and an arm; and an electromagnet built in a specific position of the door closer body (a position capable of supplying magnetic force to the spring chamber and the operation chamber) to generate magnetic force when power is applied; the spring chamber and the operation chamber are filled with MR fluid, , when the magnetic force generated by the electromagnet becomes the maximum, the MR fluid is solidified and is configured to fix the spring, the piston and the rotation shaft, thereby opening the front door and fixing it at a desired position, as well as when a fire alarm occurs, immediately the front door There is an outstanding effect of being able to close the door.

1 is a partially cut-away perspective view of a door closing device using MR fluid according to an embodiment of the present invention.
2 is a plan cross-sectional view of a door closing device using MR fluid according to an embodiment of the present invention.
3 is a front cross-sectional view of a door closing device using MR fluid according to an embodiment of the present invention.
4 is a side cross-sectional view of a door closing device using MR fluid according to an embodiment of the present invention.
FIG. 5 is a detailed view of the piston of FIG. 1 .
6 is a control block diagram of a door closing device using MR fluid according to an embodiment of the present invention.

In describing the embodiments of the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification. The terminology used in the detailed description is for the purpose of describing embodiments of the present invention only, and should in no way be construed as limiting. Unless explicitly used otherwise, expressions in the singular include the meaning of the plural. In this description, expressions such as “comprising” or “comprising” are intended to indicate certain features, numbers, steps, acts, elements, some or a combination thereof, one or more other than those described. It should not be construed as excluding the existence or possibility of other features, numbers, steps, acts, elements, or any part or combination thereof.

In each system shown in the figures, elements in some instances may each have the same reference number or different reference numbers to suggest that the represented elements may be different or similar. However, elements may have different implementations and work with some or all of the systems shown or described herein. The various elements shown in the drawings may be the same or different. Which one is referred to as the first element and which is referred to as the second element is arbitrary.

In this specification, when any one component 'transmits', 'transfers' or 'provides' data or signal to another component, one component directly transmits data or signal to another component, of course, and transmitting data or signals to the other component via at least one other component.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 is a partially cut-away perspective view of a door closing device using MR fluid according to an embodiment of the present invention, FIG. 2 is a plan sectional view of a door closing device using MR fluid according to an embodiment of the present invention, and FIG. 3 is this view It is a front sectional view of a door closing device using MR fluid according to an embodiment of the present invention, FIG. 4 is a side sectional view of a door closing device using MR fluid according to an embodiment of the present invention, and FIG. 5 is a detailed view of the piston of FIG. 6 is a control block diagram of a door closing device using MR fluid according to an embodiment of the present invention.

As shown in FIGS. 1 to 5, the door closing device using MR fluid according to an embodiment of the present invention includes a door closer body 2, a spring 6, a piston 8, a rotating shaft 22, an electromagnet ( M), a viscosity control unit 100, a fire detection unit 110 and a control unit 200 includes.

The door closer main body 2 is mounted on the upper part of the door, and the operation chamber 4, the spring chamber S, and the first and second flow passages 10 and 12 are formed. The first flow passage 10 communicates with the spring chamber S, and the second flow passage 12 is formed in the operation chamber 4 . The door closer body 2 is manufactured by die-casting of an aluminum material, and an operation chamber 4 that blocks the entrance on one side of the cap 24 is formed long, and a first flow path 10 is formed on one side rear of the operation chamber 4 . and a second flow path 12 are formed. The outlet of the first flow path 10 communicates with the spring chamber S in the other section of the operation chamber 4 through the gear chamber. The outlet 30 of the second flow passage 12 has already passed through the sealing portion 32 just before the inlet 26 of the first flow passage 10 is blocked by the sealing portion 32 when the piston 8 returns. formed at the point.

The spring chamber S and the operation chamber 4 are filled with MR fluid MR. When the magnetic force generated by the magnetic force in the electromagnet M reaches the maximum, the MR fluid MR is solidified and the spring 6, the piston 8, and the rotating shaft 22 are fixed, and at this time, the door is fixed. . When the magnetic force generated by the electromagnet M is adjusted to an intensity other than the maximum intensity, the viscosity of the MR fluid MR is changed and the door speed is adjusted. Since the viscosity of the MR fluid MR with respect to the strength of the magnetic force is approximately linear, as the strength of the magnetic force is increased, the viscosity of the MR fluid MR increases, so that the speed of the rotating shaft 22 is also slowed and the speed of the door is slowed down. On the other hand, to increase the speed of the door, the strength of the magnetic force may be decreased.

The spring 6 is configured to be disposed in the spring chamber S to bias the piston 8 when it is relaxed.

The piston 8 is disposed in the operating chamber 4 and can be biased by a spring 6 , and a rack gear 18 is formed on a part of its circumference. As shown in FIG. 5, the piston 8 has a sealing part 32 having a larger diameter than the body on one side with a body having a rack gear 18 interposed therebetween, and a support part 36 on the other side. is formed.

The rotation shaft 22 is equipped with a pinion gear 20 gear-coupled to the rack gear 18, and is connected to the door frame and the arm by an arm. When the rotation shaft 22 rotates in the clockwise direction, the piston 8 compresses the spring 6 while the door is opened while the door is closed when the door is rotated in the counterclockwise direction. At this time, the piston 8 rotates the spring 6 ) as it is biased and receives a force. As the speed of the rotating shaft 22 increases, the speed of the door also increases in conjunction with it.

The electromagnet M is built in a specific position of the door closer main body 2 (that is, a position capable of supplying magnetic force to the spring chamber S and the operation chamber 4) to generate magnetic force when power is applied from the control unit 200. plays a role in generating

The viscosity adjusting unit 100 is mounted on the handle or one side of the door, and serves to adjust the viscosity of the MR fluid MR by setting the strength of the voltage applied to the electromagnet M. The viscosity control unit 100 provides a setting signal corresponding to the strength of the set voltage to the control unit 200 .

The fire detection unit 110 is a fire detection sensor mounted on one side of the door to detect the occurrence of a fire and provide a detection signal to the control unit 200 .

The control unit 200 receives a setting signal and a detection signal from the viscosity adjusting unit 100 and the fire detection unit 110, respectively, to determine the intensity of the set voltage and whether to detect a fire, and applies the corresponding set voltage to the electromagnet (M). plays a role in accreditation.

The operation of the door closing device using the MR fluid according to the embodiment of the present invention configured as described above will be described.

First, when the intensity of the voltage applied to the electromagnet M is set by the viscosity adjusting unit 100, the control unit 200 controls the power unit 210 correspondingly to apply the set voltage to the electromagnet M. . At this time, the MR fluid MR is applied with a magnetic force according to a set voltage from the electromagnet M to change its viscosity, and accordingly, the speed of the door is determined. Here, as the viscosity of the MR fluid MR increases, the speed of the door becomes slower.

On the other hand, when a fire is detected by the fire detection unit 110, the control unit 200 controls the power supply unit 210 to cut off the power applied to the electromagnet M, and accordingly, the MR fluid MR is liquid. As the piston 8 is biased by the spring 6, the door is closed.

According to the door closing device using the MR fluid according to the embodiment of the present invention configured as described above, it is mounted on the upper part of the door, and an operation chamber, a spring chamber, and first and second flow paths are formed, and the first flow path includes the spring chamber and the a door closer body communicating with the second flow path, the door closer body being formed in an operation chamber; a spring disposed in the spring chamber; a piston disposed in the operating chamber and capable of being biased by the spring and having a rack gear formed on a periphery thereof; a rotation shaft on which a pinion gear gear-coupled to the rack gear is mounted and connected by a door frame and an arm; and an electromagnet built in a specific position of the door closer body (a position capable of supplying magnetic force to the spring chamber and the operation chamber) to generate magnetic force when power is applied; the spring chamber and the operation chamber are filled with MR fluid, , when the magnetic force generated by the electromagnet becomes the maximum, the MR fluid is solidified and is configured to fix the spring, the piston and the rotation shaft, thereby opening the front door and fixing it at a desired position, as well as when a fire alarm occurs, immediately the front door You can close the door.

In the drawings and specification, the best embodiment is disclosed, and specific terms are used, but these are used only for the purpose of describing the embodiments of the present invention, and are used to limit the meaning or limit the scope of the present invention described in the claims it didn't happen Therefore, it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

2: Door closer body
4: operating room
6: Spring
8: piston
10: 1st Euro
12: 2nd Euro
18: rack gear
20: pinion gear
22: rotation
24: cap
32: sealing part
S: spring seal
M: electromagnet
MR: MR fluid
100: viscosity control unit
110: fire detection unit
200: control unit
210: power supply

Claims (4)

It is mounted on the upper part of the door, and an operation chamber 4, a spring chamber S, and first and second flow paths 10 and 12 are formed, the first flow passage communicates with the spring chamber, and the second flow passage operates The door closer body (2) formed in the seal;
a spring (6) arranged in said spring chamber;
a piston (8) disposed in the operating chamber and capable of being biased by the spring and having a rack gear (18) formed on its circumference;
a rotation shaft 22 on which a pinion gear 20 geared to the rack gear is mounted and connected to the door frame and the arm; and
and an electromagnet (M) built in a specific position of the door closer body (a position capable of supplying magnetic force to the spring chamber and the operation chamber) to generate magnetic force when power is applied;
The spring chamber and the operation chamber are filled with MR fluid (MR), and when the magnetic force generated by the magnetic force in the electromagnet is maximized, the MR fluid is solidified to fix the spring, the piston and the rotating shaft,
Viscosity control unit 100 configured to adjust the viscosity of the MR fluid (MR) by setting the intensity of the voltage applied to the electromagnet (M);
a fire detection unit 110 configured to detect the occurrence of a fire; and
The control unit 200 is configured to apply the voltage set to the electromagnet based on the intensity of the voltage set by the viscosity adjusting unit and the detection signal of the fire detection unit;
The control unit 200 cuts off the power applied to the electromagnet (M) when a fire is detected through the fire detection unit 110, a door closing device using MR fluid.
The method of claim 1,
When the magnetic force generated by the electromagnet (M) is adjusted to a strength other than the maximum strength, the viscosity of the MR fluid is changed and the speed of the door is adjusted.
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