KR200246965Y1 - Hydraulic type door closer - Google Patents

Abstract

The present invention relates to a door closer, and more particularly, to a hydraulic door closer is installed between the door and the door frame is configured to act as a hinge of the door at the same time as the door closer.

An object of the present invention is to solve the above problems, to simplify the configuration of the piston in the hydraulic door closer and to provide a hydraulic door closer configured to eliminate the need for a separate spring type door closer.

In order to realize the above object, the present invention provides the first and second cylindrical parts 51 and 55 rotatably coupled to each other, and the first and second hinges 50 and 54 fixed to the door and the door frame, respectively, The rotating member 53 is fixed to the first cylindrical portion 51 and the helical gear 52 is formed to a predetermined length, and is coupled to the helical gear 52 and fixed to the second cylindrical portion 55 to fix the first and second parts. Moving member 4 provided with piston 3 to pressurize / suction fluid while rotating and moving by helical gear 52 during rotation of hinges 50 and 54, and the fluid in another space in chamber 58 A flow passage 7 installed to move to the flow passage 7, a valve body 6 fixed to the second cylinder portion 55 to adjust the resistance of the fluid flowing into / in the flow passage 7, and a flow control valve provided therein A hydraulic door closer comprising:

A spring 5 inserted between the rotating member 53 and the moving member 4 to apply elasticity to push the moving member 4 to be converted into a force for closing the door by the helical gear 52. It is characterized by.

Description

Hydraulic Door Closer {HYDRAULIC TYPE DOOR CLOSER}

The present invention relates to a door closer, and more particularly, to a hydraulic door closer is installed between the door and the door frame is configured to act as a hinge of the door at the same time as the door closer.

In general, in the company's indoors, libraries, hospitals, laboratories, etc. where quietness is required, the quietness is required when the door is opened and closed. When the above door is closed, the door is particularly loud, so the door should be closed quietly.

In order to close the door quietly, a person should put the door slightly and then close the door frame so that it does not close. The door closer is installed because it is difficult and cumbersome for a person to do this every time.

As shown in FIG. 5, the door closer is fixed to the first cylindrical portion 51 of the first hinge 50, the rotating member 53 having the helical gear 52 formed thereon, and the first cylinder. The second cylindrical portion 55 of the second hinge 54 formed to be in close contact with the portion 51 and the second cylindrical portion of the second hinge 54 so that the rotating member 53 is inserted and lifted during rotation. The piston 57 is installed on the 55 and the check valve 56 is installed at the front end, and the chamber 58 is formed so that the piston 57 can move therein and is coupled to the second cylindrical portion 55. It consists of the valve part 59.

In addition, a flow path 60 and a valve 61 are formed in the valve portion 59, and the fluid pushed in the chamber 58 is spaced between the first and second cylindrical portions 51 and 55. The space is formed to move through the flow path 60.

Of course, a spring type door closer (not shown) is separately installed to give a rotational force to the hydraulic door closer.

Referring to the operation of the hydraulic door closer as described above, when the door is opened and closed, the piston 57 helically coupled to the rotating member 53 moves up and down while the first and second hinges 50 and 54 are rotated.

For example, when the piston 57 is raised in the drawing, the fluid inside the chamber 58 is compressed and flows into the valve 61 and the flow path 60 as well as the first and second cylindrical portions. It flows in between the piston 57 and the 2nd cylindrical part 55 through between 51 and 55. As shown in FIG.

At this time, the check valve 56 is a direction in which the fluid does not move, so that the fluid is slowly closed by the friction passing through the valve 61.

Of course, when the door is opened, the piston 57 is in a downward direction, and the fluid introduced between the piston 57 and the second cylindrical part 55 again passes through the check valve 56. Inflow to (58).

However, if the above-mentioned hydraulic door closer serves only as a damper (to close the door slowly) as described above, in order to give the closing force of the door, a separate spring type door closer is required. There is a problem that the installation work of the closure becomes inconvenient.

In addition, when the check valve for controlling the flow of the fluid is integrally installed on the piston, there is a problem that the configuration of the piston is complicated and difficult to manufacture.

Accordingly, an object of the present invention is to provide a hydraulic door closer configured to simplify the configuration of the piston in the hydraulic door closer and to eliminate the need for a separate spring type door closer.

In order to achieve the above object, the present invention provides the first and second hinges rotatably coupled to the first and second cylindrical portions, and fixed to the door and the door frame, respectively, and the helical gear is fixed to the first cylindrical portion. A rotating member formed with a helical gear, and a moving member coupled to the helical gear and fixed to the second cylindrical portion, the piston being installed to press / suck fluid while rotating and moving by the helical gear when the first and second hinges rotate; A flow path installed to move one fluid from the chamber to another space, a valve body fixed to the second cylinder to adjust the resistance of the fluid flowing into or in the flow path, and a flow control valve provided therein Hydraulic door closer,

It is characterized in that it comprises a spring inserted between the rotating member and the moving member is applied to the elastic force to push the moving member is converted into a force to close the door by the helical gear.

Figure 1a is a cross-sectional view showing a hydraulic door closer open state according to the present invention.

Figure 1b is a cross-sectional view showing a closed state in Figure 1a,

Figure 2 is an assembled side view of the first and second hinges in Figure 1a,

3 is an exploded perspective view of FIG. 1;

4 is a cross-sectional view showing an installation state of a check valve in FIG.

5 is a cross-sectional view showing a general hydraulic door closer,

Explanation of symbols on the main parts of the drawings

1: fixing nut 2: pressure bolt

3: piston 4: moving member

5, 18: spring 6: valve body

7: Euro 8: extension protrusion

9: groove 10: circular passage

11: first communicator 12: second communicator

13: third communication hole 14: connecting passage

15: valve seat 16: valve body

17: Contact pin 19: Release valve

20: hinge 21: check valve

50: first hinge 51: first cylindrical portion

52: helical gear 53: rotating member

54: second cylindrical portion 55: second hinge

1A, 1B, 2, and 3 are assembled cross-sectional views showing the door closer according to the present invention and assembled side and exploded perspective views of the first and second hinges, which are inserted into the first cylindrical part 51 and fixed with a key; In addition, a spiral helical gear 52 having a predetermined length is formed and fixed to the first cylindrical portion 51 to press the rotating member 53 inserted into the second cylindrical portion 55 and the rotating member 53. The pressure bolt 2 screwed to the fixing nut 1 and the helical gear 52 are inserted into the second cylindrical portion 55 so as to move when rotated and the piston 3 is coupled to the end. The movable member 4 and the spring 5 which is inserted between the rotating member 53 and the movable member 4 and pushes the movable member 4 to the closing force of the door, and A valve body 6 coupled to the end of the second cylindrical portion 55 while forming a chamber 58 spaced apart from the piston 3 by a predetermined distance; The fluid passing through the de-6 consists of a passage (7) consisting of a predetermined diameter so that the back flowing into the back surface of the piston 3.

In this case, the flow path 7 is formed with an expansion protrusion 8 in the second cylindrical portion 55 in order to obtain a sufficient fluid flow, so that the flow passage 7 is formed therein. The groove 9 is formed in the first hinge 50 so that the first hinge 50 is not caught when the first and second hinges 50 and 54 are folded.

The valve body 6 has a check valve, a flow regulating valve, and a safety valve arranged in a triangular shape. The valve body 6 has a circular passage 10 throughout the circumference so as to correspond to the flow path 7. And first, second, and third communication holes 11, 12, and 13 are formed to communicate with the chamber 58, and the first, second, and third communication holes 11, 12, 13 are formed. A plurality of connection passages 14 are formed to connect the circular passage 10 with a check valve, a flow control valve, and a safety valve are installed in the first, second, and third communication holes 11, 12, 13. It becomes.

The flow control valve is formed to control the flow of the fluid while being spaced apart from the valve seat 15 and the valve seat 15 by a predetermined distance narrowly formed on the inner surface of the first communication hole 11 and the valve body ( It is comprised by the valve body 16 screwed to 6) and adjusting the separation distance with the said valve seat 15. As shown in FIG.

In addition, the safety valve is a bar to close quickly and stop at the moment the door is closed, is inserted into the second communication hole 12 and is formed with a contact pin 17 protruding a predetermined distance toward the chamber 58 side. It consists of a release valve 19 elastically supported by a spring 18 on the back side, and second contact hole after being momentarily stopped by the elasticity of the spring 18 when the contact pin 17 is pressed by the piston 3. The fluid is quickly discharged through 12 so that the door closes instantly.

As shown in FIG. 4, the check valve includes a hinge 20 so that the piston 3 blocks the third communication hole 13 when the fluid presses the fluid in the chamber 58 and opens when the piston 3 is reversed. It consists of the check valve 21 provided with the elastic spring S. As shown in FIG.

That is, when the piston 3 pressurizes the fluid in the chamber 58, the fluid introduced through the first communication hole 11 flows into the flow path 7 through the connection passage 14 and the door is opened. When the contact pin 17 is pressed slowly by the piston 3 when the contact pin 17 is closed slowly, the fluid flows into the connecting passage 14 through the release valve 19, so that a lot of fluid flows and the door is opened. It will close quickly.

As described above, when the check valve is installed in the piston 3, which is a very small component, the assembly of the check valve is simpler because the installation space is larger.

Of course, the O-ring 22 is installed between the rotating member 53 and the second cylindrical portion 55 and between the second cylindrical portion 55 and the valve body 6 to prevent fluid leakage.

Referring to the operation and effect of the present invention as described above, in order to attach the hydraulic door closer to the door, the first and second hinges (50, 54) after releasing the valve body 16 to allow the fluid to move easily ) Is fixed to the door and the door frame respectively.

When the first and second hinges 50 and 54 are fixed to the door and the door frame, the valve body 16 is tightened while the door is opened to adjust the speed at which the door is closed.

That is, in the state in which the door is opened, the state becomes as shown in FIG. 1A. When the door is opened, the moving member coupled to the second cylindrical portion 55 by the rotation of the first and second hinges 50 and 54 ( 4) rotates in the helical gear 52 and moves to the left in the drawing.

When the movable member 4 is moved to the left, the spring 5 is compressed and filled in the back space of the flow path 7 and the movable member 4 when the piston 3 is pulled to the left in the drawing. Fluid is filled into the chamber (58).

In this state, the spring 5 is in a compressed state. When the door is closed, the spring 5 is expanded and the moving member 4 is pushed to the right in the drawing.

When the moving member 4 receives an elastic force pushed to the right, the rotating member 53 coupled to the helical gear 52 is fixed to the first cylindrical portion 51, and the moving member 4 is the second cylindrical portion. Since it is fixed to the 55, the movable member 4 is in a rotational motion, thereby the door is closed while the second hinge 54 is rotated.

Of course, when the moving member 4 moves to the right while rotating, the fluid filled in the chamber 58 moves to the connection passage 14 and the flow path 7 through the first communication hole 11. The damping action is caused by frictional resistance.

At this time, the fluid is not moved through the check valve and the safety valve bar, when the door is almost closed, the piston (3) presses the contact pin 17 of the safety valve.

When the piston 3 presses the contact pin 17, the fluid is discharged through the release valve 19 while the contact pin 17 moves to the right. Due to the very fast discharge, the resistance to fluid movement is reduced, which causes the door to close more quickly.

Here, the more the valve body 16 is released to allow the fluid to move more easily, the faster the door is closed, and the more the valve is closed more slowly.

Of course, when the door is opened, the fluid moves to the chamber 58 through the first communication hole 11 provided with the valve body 16 and the third communication hole 13 provided with a check valve. The fluid can be easily moved, making the door very easy to open.

Here, if the above-mentioned hydraulic door closer is installed on the upper or lower portion of the door, and the rest of the ordinary hinge (not shown) is provided, the door can be opened and closed.

As described above, the present invention has the advantage that there is no need to install a spring type door closer separately by embedding a spring that can close the door inside the hydraulic door closer.

In addition, there is an advantage that the configuration and assembly of the check valve can be made simpler by integrally installing the valve body without installing the check valve on the piston.

Claims (3)

First and second hinges rotatably coupled to the first and second cylindrical portions, and fixed to the door and the door frame, respectively, a rotating member fixed to the first cylindrical portion and having a helical gear having a predetermined length, and the helical gear described above. A moving member coupled to the second cylindrical portion and mounted with a piston to pressurize / suck fluid while rotating and moving by a helical gear when the first and second hinges rotate, and the fluid moves from the chamber to another space. In the hydraulic door closer, characterized in that it comprises a flow passage provided, a valve body fixed to the second cylinder portion to adjust the resistance of the fluid flowing into / in the flow path and a flow control valve provided therein, And a spring inserted between the rotating member and the moving member to apply elasticity to push the moving member and to be converted into a force for closing the door by the helical gear. The method of claim 1, The valve body has a second communication hole is formed in communication with the chamber, the safety valve is composed of a release valve which is elastically supported by a spring to open and close the second communication hole and protruding a predetermined distance contact pin into the chamber. And the release valve is opened by the spring elasticity at the moment the door is closed and the release valve is opened to increase the fluid discharge and close the door faster. The method according to claim 1 or 2, The valve body has a third communication hole in communication with the chamber is formed, the check is composed of an opening and closing valve installed by a hinge so that the third communication hole is blocked when the piston presses the fluid in the chamber and open when suction Hydraulic door closer characterized in that it comprises a valve.