KR100761658B1 - Door closer for stop type - Google Patents

Abstract

A stoppable door closer is provided to close a door when the door is opened by a predetermine angle and to hold the door when the door is opened wide by using an auxiliary piston. A stoppable door closer includes a cylinder(10), a piston(20), a spring(40), a pinion gear(32), and an auxiliary piston(50). Installed to one side of a door, the cylinder has an inner space containing operating oil, a path(11) with a function converting screw(14) and a pinion housing unit(16). The piston slides in the inner space of the cylinder, contacts with the auxiliary piston(50) at one side, has a check valve(26) at the other side and a rack at the outside. The spring is installed in the cylinder to return the auxiliary piston. The pinion gear is located in the pinion housing unit, and interlocked with a rack(20a) formed at the piston. Sliding in the cylinder, the auxiliary piston contacts with the piston at one side, and with the spring at the other side, and has a path through which operation oil flows.

Description

Door Closer For Stop Type

1 is a schematic diagram showing a state in which a door closer mounted on a door operates.

2 is a cross-sectional view showing a preferred embodiment of the present invention,

3 is an exploded perspective view showing the configuration of the present invention,

4 is a cross-sectional view showing a state when a door (not shown) is opened;

5 is an explanatory view of the operation when the door (not shown) remains stationary;

6 shows when the door (not shown) is switched from the stopped state to the closed state and when the function is switched

     It is explanatory drawing which shows the operation state of.

* Description of the major signs in the drawings

10: cylinder

10a: Cylinder front chamber 10b: Cylinder rear chamber 10c: Auxiliary space

11: euro

11a: Function switching hole 11b: Cylinder full chamber hole 11c: Cylinder rear thread hole

12.13: Speed adjusting screw 14: Function switching screw

15: cylinder cap

16: pinion storage

20: piston 20a: rack

21: piston flange

24: through hole

26: check valve

30: pinion assembly

31: pinion shaft 32: pinion gear 33: pinion gear tooth

40: spring

60: working oil

70: sealing means

100: door closer

        The present invention relates to a door closer installed at the top of the door so that the door can be closed slowly after opening the door, and more particularly, when the door is opened or closed at a predetermined angle, the door closer operates like a normal door closer. In case of opening more than a certain angle, the door can be kept open without any additional operation or equipment. Especially, the stationary door closer can be switched to the general door closer which performs only the normal closing function with the simple adjustment of the screw. It is about.

In general, the door is installed at the top of the door for closing so that the door closes itself slowly, and at one side of the bottom door, a door stopper is installed to keep the door in a stopped state.

Such a sliding door is not only aesthetically pleasing because the door closer and the door stopper must be separately installed at the top and the bottom, and when the door stopper is used, the door stopper must be operated using the foot or the hand.

In order to solve this problem, many inventors have developed a stationary door closer capable of self-stopping over a certain angle without using a door stopper.

However, since most of the stationary door closers developed in this way are kept stationary by mechanical force using racks and pinions, the operation is not smooth and shock occurs when the door is stopped and released. Therefore, when you want to open the door from a larger angle there is a problem that a separate door stopper must be installed.

By improving the above problems, the operation is smooth and can be always stopped at a certain angle or more, and it is necessary to develop a stationary door closer that can switch to a stationary or general type when necessary.

The present invention solves the above problems while performing a closing function like a conventional door closer at a predetermined angle or less, and when opened at a predetermined angle or more, while maintaining the stop state of the door without additional operation or addition of equipment It is an object of the present invention to provide a stationary door closer which is configured to be converted into a general door closer by a simple function of a screw when necessary.

The present invention has been invented in order to achieve the above object, the additional auxiliary piston 50 is installed between one side of the piston and the return spring 40, the flow path 11 formed in the cylinder 10 in a predetermined position It is configured to stop the piston 20 by controlling the movement of the working oil 60 by blocking the oil hole (11b) of the), and by switching the function switch screw 14 attached to the cylinder (10) 11a) is opened so that it can be converted to a general door closer.

One embodiment of the present invention for achieving the above object in detail by the drawings

The explanation is as follows.

1 is a schematic view showing a state in which a door closer mounted on a door is operated. As shown in FIG. 1, when the door D is opened, a lever L installed in the door closer 100 is operated by the action of the lever L. Referring to FIG. The combined pinion 130 is rotated so that the door D may be slowly closed.

2 is a cross-sectional view showing a preferred embodiment of the present invention,

Figure 3 is an exploded perspective view showing the configuration of the present invention will be configured as follows

The cylinder 10 is mounted on one side of the door and has a space formed therein, and the hydraulic oil 60 is received in the space, and the flow path 11 and the pinion housing 16 are formed:

The cylinder 10 is inserted into the inner space is in sliding contact, one side is composed of a check valve 26, the other side is in close contact with the auxiliary piston 50 described below, the outer peripheral surface is formed with a rack 20a With the piston 20:

A spring 40 mounted on one side of the cylinder 10 to elastically support the auxiliary piston 50; and

The pinion assembly accommodated in the pinion housing 16 of the cylinder 10 and engaged with the rack 20a formed on the piston outer circumferential surface by a pinion gear gear 33 formed on the outer circumferential surface to transmit power. 30): with

The outer circumferential surface is in sliding contact with the inner space of the cylinder 10, one side is in close contact with the piston 20, and the other side is composed of an auxiliary piston 50 elastically supported by the spring 40.

The flow path 11 formed in the cylinder 10 is configured to penetrate the hydraulic oil 60 to be moved to the cylinder front chamber 10a and the cylinder rear chamber 10b, and the function is switched to the cylinder front chamber 10a side flow path 11. Holes 11a and all rooms for holes 11b are formed at a certain distance. The cylinder rear chamber 10b side flow passage 11 is provided with a cylinder rear chamber oil hole 11c at a predetermined distance to control the primary and secondary door closing speeds when the piston is returned.

In more detail,

The function change oil hole 11a on the cylinder front chamber 10a side is provided with a function change screw 14 for switching a function to a stationary or general door closer.

The oil hole 11b for the cylinder front chamber 10a is formed so that the hydraulic oil 60 can move to the cylinder front chamber 10a and the rear chamber 10b when the door is opened at a predetermined angle or less. When the opening is more than a predetermined position is formed in a position where the hole (11b) can be blocked by the auxiliary piston (50).

The cylinder rear chamber (10b) side hole (11c) is formed at a predetermined distance to easily control the first and second door closing speed, the speed adjusting screws (12, 13) is provided.

The pinion housing 16 is formed on one side of the cylinder 10 as a space for accommodating the pinion.

In addition, a cylinder cap 15 is installed at one side of the cylinder 10 to prevent leakage of the hydraulic oil 60 after the piston 20 is received.

The piston 20 is accommodated in the cylinder 10, and is formed at the left and right ends of the piston 20 and is slid by the piston flange 21 portion having the sealing means 70 by O-ring or the like. It is configured to be able to exercise, the cylinder front chamber (10a) side is configured to be in close contact with one side of the auxiliary piston 50 described below.

In addition, a through-hole 24 through which the hydraulic oil 60 can move is formed on the central axis of the piston 20. In the through-hole 24, the hydraulic oil 60 is transferred from the cylinder front chamber 11a to the cylinder rear chamber 11b. A check valve 26 for transmitting in a constant direction is provided.

The pinion 30 is accommodated in the pinion housing 16 of the cylinder 10, and is directly connected to the lever mounted on the door to transmit power while rotating by a predetermined angle according to the opening / closing angle of the door ( 31) and the pinion gear 32 are engaged with the rack 20a formed on one side of the piston 20 to transmit power.

The auxiliary piston 50 is in sliding contact with the inner space of the outer cylinder surface, one side is in close contact with the piston 20 and one side is elastically supported by the spring (40).

In addition, the central portion is formed with a flow path through which the hydraulic oil 60 can flow, and the outer circumferential surface is configured as an end portion so as to form an auxiliary space portion 10c through which hydraulic pressure can be evenly applied.

The spring 40 is mounted on one side of the cylinder 10 so that the auxiliary piston 50 can be in close contact with the piston 20. The spring 40 returns the cylinder 20 by the accumulated elastic force when the door is opened. It will act as a slow closing.

Looking at the operation state of the stationary and general combined door closer configured as described above by the accompanying drawings as follows.

First, an operation state when the door closer is stopped will be described with reference to FIG. 5.

When the door closer is to be stopped, the function switching hole 11a must be closed by the function switching screw 14 first.

When the door is opened slowly, the pinion gear 32, which is connected by the lever, will rotate slowly in the counterclockwise direction as shown by the arrow.

Then, the piston 20 which is tooth-bound with this moves in the direction of the cylinder front chamber 10a as shown by the arrow.

When the piston 20 moves, the auxiliary piston 50 which is in close contact with the piston 20 also moves in the direction of the cylinder front chamber 10a. At this time, the spring 40, which is an elastic body, is brought into close contact with the cylinder front chamber 10a, thereby providing elastic force. Accumulated and used as return energy when the door is closed.

At this time, the hydraulic oil 60 in the front chamber 10a is connected to the rear cylinder cylinder in the front cylinder chamber 10a by a check valve 26 and a flow path 11 in the through hole 24 of the piston 20, as in a normal door closer. It moves to 10b.

However, when the door (not shown) is continuously opened, the oil chamber 11b is blocked by the outer circumferential surface of the auxiliary piston 50 at a predetermined point or more.

As such, when the external force is removed while the front chamber oil hole 11b is blocked, the spring 40 strongly pushes the auxiliary piston 50 toward the rear cylinder chamber 10b, and the auxiliary piston 50 pushes the piston 20. Since it is pushed strongly, the contact surface of the auxiliary piston 50 and the piston 20 is kept in close contact with the movement of the hydraulic oil 50 through the flow path 11 is blocked.

In addition, since the book valve 26 in the piston 20 allows flow in only one direction, all the movement of the hydraulic oil 60 is stopped.

Therefore, even if the piston 20 is pushed to the rear cylinder chamber 10b by the spring 40, the hydraulic fluid 50 does not move, so the piston 20 cannot move any more, so that the door is stopped. will be.

The operation state when the door closer held in the stopped state is switched to the closed state of the door will be described with reference to FIG.

When an external force is applied to the door (not shown) in the closing direction, the pinion 30 tries to rotate in a clockwise direction as shown by the arrow shown in the drawing, and the piston 20 engaged therewith is also in the direction of the cylinder rear thread 10b as shown by the arrow. Will try to move to.

At this time, the pressure of the hydraulic oil 60 in the cylinder rear chamber 10b is increased.

Increasing the pressure of the hydraulic oil 50 of the cylinder rear thread 10b increases the pressure of the flow passage 11 and the auxiliary space 10c connected thereto, and the increased pressure overcomes the force of the spring 40 and the auxiliary piston. Lifting the 50 will cause the piston 20 and the auxiliary piston 50 to generate a gap.

When an external force is applied to the door in the closing direction for a predetermined time, the hydraulic oil 50 of the rear cylinder 10b gradually moves to the front cylinder 10a by the gap generated in this way, and the auxiliary piston is moved due to the movement of the hydraulic oil 50. 50 is opened in the front chamber oil hole (11b) that is blocked by moving in the direction of the cylinder chamber 10a, the hydraulic oil 50 is free to move the opening of the oil hole (11b), so the normal door closer in the stationary state It will be able to close function like this.

The process of switching the function from the stationary door closer to the general door closer is as follows.

In order to switch the function to the general door closer, the function switching hole 11a is opened by the function switching screw 14 located in the cylinder front chamber 10a.

Opening of the function switching oil hole 11a always opens the flow path 11 connected to the cylinder rear chamber 10b from the front cylinder 10a to the rear cylinder 10b regardless of the position of the auxiliary piston 50 so that the hydraulic oil 50 can be freely moved. If the external force is removed after opening the door, the piston 20 moves to the cylinder rear chamber 10b by the force of the spring 40, so that the door closer does not maintain the stop state and easily performs the normal closing function. It becomes a closure.

The present invention has been described above with reference to the accompanying drawings and embodiments, but the present invention is not limited to the specific embodiments, and modifications of the present invention can be easily carried out by those skilled in the art to which the present invention pertains. It is obvious that it belongs to the technical idea of this invention.

The door closer configured as described above performs a closing function like a normal door closer at a predetermined angle or less, but at a predetermined angle or more, it provides a stationary door closer that can keep the door in a stopped state without a separate operation or equipment.

In addition, there is an advantage that the function can be switched so that you can easily function as a normal door closer.

Claims (2)

A cylinder 10 mounted on one side of the door and having a space formed therein and having a hydraulic oil 60 therein, having a flow path 11 having a function change screw 14 and a pinion housing 14 formed therein; : The piston 10 is inserted into the inner space is in sliding contact, one side is in close contact with the auxiliary piston 50, the other side is composed of a check valve 26, the outer peripheral surface of the piston 20 is formed with a rack: A spring 40, which is mounted on one side of the cylinder 10 and configured to allow the auxiliary piston 50 to elastically return, is stored in the pinion housing 14 of the cylinder 10, and the piston 20 Pinion gear 32 that is engaged with the formed rack (20a) to transfer power and is inserted into the cylinder 10 and the inner space is in sliding contact, one side is in close contact with the piston 20 and the other side is the spring (40) It is elastically supported by the), the flow path for the hydraulic oil 60 is formed and the outer circumferential surface has an auxiliary piston (50): the end is formed of when the door is opened by a predetermined angle or more movement of the hydraulic oil (60) To stop Characterized in that configured so that the static type of door closer. The method according to claim 1 The flow path 11 formed in the cylinder 10 has a front cylinder 10a and a rear cylinder 10b. In particular, the oil holes 11a and 11b of the flow path 11 formed on the cylinder chamber 10a side have two oil holes 11a and 11b formed at a predetermined distance, and the oil holes 11a located at the outside. The stop-type door closer, characterized in that configured to open and close the hole (11a) by the function switching screw (14) configured to switch the function to the stationary or general type.

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