KR101164386B1

KR101164386B1 - Door closer

Info

Publication number: KR101164386B1
Application number: KR1020110093144A
Authority: KR
Inventors: 김지환
Original assignee: 김지환
Priority date: 2011-09-15
Filing date: 2011-09-15
Publication date: 2012-07-09

Abstract

PURPOSE: A door closer is provided to improve an environmentally-friendly effect because oil is not required and to freely control the opening degree of a door. CONSTITUTION: A door closer comprises a doorframe mounting unit, a power transmission unit, and an actuating arm. The doorframe mounting unit is composed of an attachment unit(110) and a mounting unit. The attachment unit is fixed to a doorframe. The mounting unit is integrally formed on the attachment unit. The power transmission unit is composed of an outer frame(210), a fixed gear, a speed reducer, a forward and backward rotation motor, a movable gear, an elastic spring(260), an inner frame(270), and a rotation link(280). The fixed gear and the speed reducer are installed on the outer frame. The movable gear is meshed with the fixed gear. The elastic spring connects the mounting unit to the outer frame. One end of the rotation link is connected to the mounting unit. The actuating arm is connected to the other end of the outer frame and fixed to a door.

Description

Door Closer

The present invention relates to a door closer, and more particularly, to reduce the manufacturing cost and after-sales cost, and is environmentally friendly by not using oil, and relates to a door closer that can maintain the open state of the door at various angles.

In general, existing door closers installed in the front door, etc., when a person releases their hand from the door after entering or exiting the door, the door is slowly closed by hydraulic pressure by the hydraulic system installed in the door closer. It is configured to close quickly.

However, as described above, the conventional door closer is composed mostly of hydraulic type, and not only has a problem of leaking hydraulic oil, but also a high manufacturing cost thereof.

In addition, most of the conventional door closers are closed on their own when the door is held by a person, such as a door closer filed on July 07, 2005 (application number: 20-2005-0019748, registration number: 20-0397651). In order to prevent the closing, an auxiliary device such as a stopper is provided below the door to prevent the door from being closed by friction with the floor of the building. Therefore, in order to close the open door, there is an inconvenience that a person must leave the stopper installed at the lower side of the door by lowering the upper body from the bottom surface.

The present invention has been made to solve the above problems of the prior art, it is possible to reduce the cost by reducing the manufacturing cost and after-sales cost by simplifying the structure into a mechanical structure, do not use oil, environmentally friendly door closer The purpose is to provide.

In addition, an object of the present invention is to provide a door closer that can maintain an open state of the door at various angles and reduce the risk of being injured due to a part of the body of the building occupant between the door frame and the door.

The door closer according to the present invention for solving the above problems is a door frame installation portion consisting of a mounting portion fixed to the door frame, the mounting portion formed integrally with the attachment portion; The outer frame is a projection formed on one side is coupled to the mounting portion of the door frame mounting portion by a rotational shaft rotatably connected, a fixed gear penetrated by the rotational shaft and fixed to the inner surface of the outer frame, the reduction gear shaft provided A reduction gear penetrating the mounting portion of the door frame installation portion, a forward and reverse motor in which the provided motor shaft is connected to the reduction gear, and the rotation speed of the motor shaft is reduced, coupled to the reduction shaft of the reducer, and engaged with the fixed gear to rotate on the fixed gear. A moving gear, an elastic spring having both ends connected to the mounting portion and the outer frame of the door frame installation portion, and one side of a surface installed inside the outer frame and facing the outer frame is cut out, and a convex portion and a concave portion at the cut portion. In addition, the inside is continuously formed and the slope is inclined at a certain angle. Power transmission consisting of a frame and a rotational link installed at the other end of the door frame mounting portion to be rotatable and rotating rollers moving on the convex portion, the recessed portion and the inclined portion of the inner frame when the door is opened or closed. Wealth; It is connected to the other end of the outer frame of the power transmission unit, the operating arm is fixed to the door.

Here, the mounting portion of the door frame mounting portion is provided with a limit switch connected by the forward and reverse motor and the wire, the projection of the outer frame is formed with a contact wedge protruding, when the door is closed the limit just before closing the door The switch contacts the contact wedge.

And, the operation arm is fixed to the door, the fixing bracket having a pin installation portion on one side; A rotation bracket having a pin coupled to an end of the fixing bracket to be pivotally installed; A rotation rod installed on the rotation bracket, the rotation rod having one end rotatably connected to the other end of the outer frame; A body installed at the end of the fixing bracket, a through ring spirally coupled through the body, a coil spring having one end connected to the through ring and the other end connected to the pivot bracket, and a spiral coupling at the end of the body Consists of a pressure adjusting means made of a control bolt in contact with the rotation rod when the door is closed.

The door closer of the present invention is configured as described above is composed mostly of mechanical, less frequent occurrence of the failure compared to the existing hydraulic door closer and easy to repair even if a failure occurs, and thus the post-management cost This saves and does not contain oil has an environmentally friendly advantage.

In addition, if the rotary roller of the rotary link is inserted into a particular recess of the plurality of recesses formed in the inner frame when the door is opened, the door can be kept open, the advantage of maintaining the door open state at various angles have.

In addition, when the door is closed, there is an advantage that the closing speed of the door is reduced by the inclination of the inclined portion while the inclined portion formed in the inner frame rotating roller of the rotating link.

In addition, if the limit switch is in contact with the contact wedge of the outer frame when the door is closed, the closing speed of the door is reduced, thereby reducing the risk of being injured by the fingers of the building occupants between the door frame and the door. have.

1 is a perspective view showing the installation of the door closer according to the present invention.
Figure 2 is a perspective view showing a state of the door frame installation portion and the power transmission portion of the door closer according to the present invention.
Figure 3 is a perspective view showing an exploded view of the operating arm of the door closer according to the present invention.
4 is a perspective view showing a state in which the power transmission unit of the door closer according to the present invention is disassembled.
Figures 5a to 5b is a view of the door closer in accordance with the present invention when the door is closed and opened in one direction.
6a to 6b are views of the door closer according to the present invention when the door is closed and opened when viewed from another direction.
Figures 7a-7b show the limit switch of the door closer according to the invention when the door is closed and opened.
8a to 8c show step by step the limit switch of the door closer according to the present invention until the door is opened in a closed state.

Hereinafter, an embodiment of a door closer according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing the installation of the door closer according to the present invention, Figure 2 is a perspective view showing the door frame installation portion and the power transmission portion of the door closer according to the present invention, Figure 3 is a view of the door closer according to the present invention A perspective view showing the disassembled working arm.

And, Figure 4 is a perspective view showing the disassembled power transmission of the door closer according to the present invention, Figures 5a to 5b is a view of the door closer according to the present invention when the door is closed and opened in one direction 6A to 6B are views of the door closer according to the present invention when the door is closed and when the door is opened from another direction.

7A to 7B show the limit switch of the door closer according to the present invention when the door is closed and when opened, and FIGS. 8A to 8C show the present invention until the door is opened in the closed state. Figure shows the step by step limit switch of the door closer.

The door closer according to the present invention is installed between the door (D) and the door frame (F), so that the door (D) is automatically closed when the building occupants open the door (D), the door frame installation unit 100 and The power transmission unit 200 is connected to the door frame installation unit 100, and the operation arm 300 is connected to the power transmission unit 200.

The door frame installation unit 100 is composed of an attachment portion 110 and the mounting portion 120.

The attachment portion 110 is fixed to the upper surface of the door frame (F) by means such as bolts.

The mounting part 120 is formed integrally with the attachment part 110, and its overall shape has a shape similar to the letter 'c', and an end portion of the mounting part 120 penetrates the mounting part 120. 1 connection pin 121 is installed.

The power transmission unit 200 includes an outer frame 210, a fixed gear 220 installed on the outer frame 210, a reducer 230 installed on the outer frame 210, and the reducer 230. Reverse rotation motor 240 is installed in the), the movable gear 250 that is engaged with the fixed gear 220, the elastic connecting the mounting portion 120 and the outer frame 210 of the door frame mounting portion 100 It consists of a spring 260, an inner frame 270 installed inside the outer frame 210, and one end of the rotating link 280 is connected to the mounting portion 120 of the door frame mounting portion 100.

The outer frame 210 has a shape such that the overall shape is a 'c', the protrusion 211 is formed at one end. In more detail, the outer frame 210 has a protrusion 211 formed at one end thereof, and the protrusion 211 is coupled to the mounting portion 120 of the door frame installation unit 100 by a rotation shaft P. It is rotatably connected from the mounting part 120. Then, a second connecting pin 212 is installed right next to the protrusion 211, the rotating rod connecting portion 213 for connecting with the rotating rod 330 to be described later on the other end of the protrusion 211 is formed It is formed to protrude in a semicircular shape. In addition, the protrusion 211 is formed with a contact wedge 211a.

The fixed gear 220 is formed on one side is flat because the gear teeth are not formed, the flat surface without the gear teeth is in close contact with the inner surface of the outer frame 210. And, where the gear teeth are formed in the fixed gear 220 is formed to be round to a certain curvature. The fixed gear 220 is penetrated by the rotation shaft P and fixed inside the outer frame 210.

The reducer 230 is provided with a reducer shaft 231, the reducer shaft 231 passes through the mounting portion 120 of the door frame mounting portion 100.

The reverse rotation motor 240 is provided with a motor shaft (not shown), the motor shaft is connected to the reducer 230 is reduced the rotational speed of the motor shaft.

The mobile gear 250 is coupled to the reducer shaft 231 of the reducer 230, which moves while being rotated on the fixed gear 220 by engaging a gear tooth to the fixed gear 220.

The elastic spring 260 is a spring having a coil spring shape, and both ends of the elastic spring 260 are connected to the mounting unit 120 and the outer frame 210 of the door frame installation unit 100, respectively. In more detail, one end of the elastic spring 260 is fixed to the first connecting pin 121 fixed to the mounting portion 120 of the door frame installation portion 100, the other end is installed on the outer frame 210 It is fixed to the second connecting pin (212).

The inner frame 270 has a shape similar to the letter 'c' and is fixed inside the outer frame 210. One side of the inner frame 270 facing the outer frame 210 is cut out. The plurality of convex portions 271 and the concave portion 272 are continuously formed on the cutout portion of the inner frame 270, and the inclined portion 273 inclined at a predetermined angle θ is successively formed.

One end of the rotation link 280 is pin-coupled to the mounting portion 120 of the door frame installation portion 100 to be rotated from the mounting portion 120. The rotary link 280 is provided with a rotary roller 281 at the other end, the rotary roller 281 is a convex portion 271 and the recess of the inner frame 270 when the door (D) is opened or closed. 272 and the inclined portion 273 to exercise. Therefore, when the rotary roller 281 is located in any one of the plurality of recesses 272, the rotary roller 281 does not come out of the recess 272 unless a large external force is applied. The open state of the door D is maintained, and the closing speed of the door D is determined by the angle of the inclined portion 273 when passing through the inclined portion 273 through the recessed portion 272 and the convex portion 271. Is reduced. The reason for reducing the closing speed of the door (D) is to prevent the injuries that can be injured building occupants by closing the door (D) quickly. In other words, the inner frame 270 is installed inside the outer frame 210, and a portion in which the convex portion 271, the concave portion 272, and the inclined portion 273 is formed is formed in the outer frame 210. Since the rollers 281 are moved by the convex part 271 and the concave part 272 and the inclined part 273, because the rollers 281 are spaced apart from the side surfaces, the rotary rollers 281 are the convex part 271 and the concave part. 272 and the inclined portion 273 and at the same time in contact with the inner surface of the outer frame (210).

On the other hand, although not shown in the drawing, the door frame installation unit 100 and the power transmission unit 200 is not aesthetically good when exposed to the outside as it is appropriate to make a cover (not shown) door frame installation unit 100 and power transmission unit It is also possible to minimize the exposure of 200 to the outside.

The working arm 300 is one side is fixed to the door (D), the other side is connected to the other end of the outer frame 210 of the power transmission unit 200, the fixing bracket 310 and the fixing bracket ( Rotating bracket 320 is connected to the 310, the rotating rod 330 is installed on the rotating bracket 320, and the pressure adjusting means 340 is installed on the fixing bracket (310).

The fixing bracket 310 is flattened at both ends and fixed to the door D by means of fastening, such as bolts, and a central portion between both ends has a shape similar to the letter 'c'. The pin installation portion 311 is formed to protrude in a semicircular shape on one side of the fixing bracket 310.

The rotating bracket 320 is pinned to the end of the pin mounting portion 311 of the fixing bracket 310 is rotatably installed. The pivot bracket 320 has a shape similar to the letter 'c' in its overall form, and one or more insertion grooves 321, more specifically, two insertion grooves 321 are formed at regular intervals.

The rotation rod 330 is installed on the rotation bracket 320, one end is rotatably connected to the other end of the outer frame 210, the spiral groove is formed on one side of the outer peripheral surface. Meanwhile, as described above, an insertion groove 321 is formed in the rotation bracket 320, and a fixing nut 322 is installed in the insertion groove 321, and a rotation rod 330 is formed in the fixing nut 322. Helix coupled. Therefore, the rotation rod 330 can adjust the length protruding to the outside of the rotation bracket 320. The reason for adjusting the protruding length of the rotation rod 330 is to adjust the degree of close contact of the door (D) to the door frame (F) or the closing speed of the door (D).

The pressure regulating means 340 has a body 341, a through ring 342 penetrating the body 341, a coil spring 343 connected to the through ring 342, and the body 341. Consists of a control bolt 344 is coupled to the spiral.

The body 341 is installed at a flat end of the fixing bracket 310, and has a cylindrical shape, and a spiral is formed on an inner circumferential surface thereof.

The through ring 342 penetrates through the body 341 and is spirally coupled to the penetrated portion of the body 341 at the same time. Although the through ring 342 and the body 341 are spirally coupled as described above, the body 341 is formed in a state in which a spiral is formed only on one side of the outer surface of the through ring 342 and a spiral is not formed in the body 341. The same effect can be obtained by fastening the nut to the penetrating through ring 342.

One end of the coil spring 343 is connected to the through ring 342, and the other end thereof is connected to the pivot bracket 320. Accordingly, by adjusting the elastic force of the coil spring 343 by rotating the through-ring 342 in one direction or the other direction from the body 341, the closing speed of the door D may be adjusted.

The adjusting bolt 344 is coupled to the end of the body 341, the spiral in more detail, it is coupled to the spiral formed on the inner circumferential surface of the body 341 to adjust the length protruding from the body 341. The adjustment bolt 344 is a part that is in contact with the rotation rod 330 when the door (D) is closed, it performs a kind of buffering role.

On the other hand, the mounting unit 120 of the door frame installation unit 100 is provided with a limit switch 130 connected by the forward and reverse rotation motor 230 and the wire (W), the limit switch 130 is a door (D) When the c) is closed, the contact wedge 211a formed in the protrusion 211 of the outer frame 210 immediately before the door D is closed.

In more detail, the D.C motor (direct current motor), the forward and reverse rotation motor 230 when the motor shaft (not shown) is rotated without supplying power from the outside, electricity is generated by the law of Fleming's right hand. When the electric wire (W) is connected so that the electricity generated in this way is supplied to the limit switch 130, the limit switch 130 is in contact with the contact wedge (211a) of the protrusion 211, the speed of closing the door (D) To reduce. The reason why the limit switch 130 is in contact with the contact wedge 211a immediately before the door D is closed, that is, before the door D is brought into close contact with the door frame F, is the building between the door frame F and the door D. This is to prevent injuries from getting caught by people's fingers or arms.

Here, after installing only the forward and reverse motor 230 without installing the limit switch 130, if the (+) terminal and the (-) terminal provided in the forward and reverse motor 230 are connected by the wire (W), the short (short) The load is generated, and the speed at which the external frame 210 is rotated from the mounting unit 120 of the door frame installation unit 100 is reduced by such a load generation.

In addition, the installation position of the limit switch 130 is not necessarily limited to the mounting portion 120 of the door frame installation portion 100, and is in contact with the contact wedge 211a of the protrusion 211 when the door D is closed. It doesn't matter where you are.

Looking at the operation process of the door closer according to the present invention configured as described above are as follows.

The power transmission unit 200 connected to the mounting unit 120 of the door frame installation unit 100 when the building intruder pushes or pulls the door D to open the door D while the door D is closed. The outer frame 210 is rotated from the mounting portion 120 and at the same time the length of the elastic spring 240 is expanded, the moving gear 250 is moved on the fixed gear 220 of the power transmission unit 200 is rotated. When the moving gear 250 rotates, the reduction gear shaft 231 of the reduction gear 230 also rotates, and the motor shaft of the forward and reverse rotation motor 240 also rotates.

Then, the rotating bracket 320 of the operating arm 300 is rotated from the fixing bracket 310 and the rotating rod 330 which is in contact with the adjusting bolt 344 is spaced apart from the adjusting bolt 344 and the coil spring 343. The length of is expanded.

In addition, the rotary roller 281, which is installed at the end of the rotation link 280 of the power transmission unit 200 and is in contact with the inclined portion 273 of the inner frame 270 while the door D is closed, has an inner frame ( The inclined portion 273, the convex portion 271 and the concave portion 272 of the 270 are sequentially rotated while riding.

In this state, when the building exiting member releases the force acting on the door D, the rotary roller 281 of the rotation link 280 is inserted into the specific recess 272 among the plurality of recesses 272. When the rotary roller 281 is inserted into the recess 272 in this way, the open state of the door D is maintained.

When the door (D) is opened through the above process, the forward and reverse motor 240 and the reduction gear 230 affect the rotation process of the outer frame 210 to the sudden change of the external force acting on the door (D). This prevents the opening speed of the door D from changing rapidly. Similarly, even when the door D is closed in the open state, the forward and reverse rotation motor 240 and the reduction gear 230 have a sudden change in the closing speed of the door D due to a sudden change in the external force acting on the door D. prevent.

100: door frame installation portion 110: attachment portion
120: mounting portion 121: first connecting pin
130: limit switch 200: power transmission unit
210: outer frame 211: protrusion
211a: contact wedge 212: second connecting pin
213: rotating rod connecting portion 220: fixed gear
230: reducer 231: reducer shaft
240: forward and reverse motor 250: moving gear
260: elastic spring 270: inner frame
271: convex portion 272: concave portion
273: inclined portion 280: rotating link
281: rotating roller 300: working arm
310: fixing bracket 311: pin mounting portion
320: rotating bracket 321: insertion groove
322: fixing nut 330: rotating rod
340: pressure control means 341: body
342: through ring 343: coil spring
344: adjusting bolt D: door
F: door frame P: axis of rotation
W: wire

Claims

A door frame installation part 100 including an attachment part 110 fixed to the door frame F and a mounting part 120 formed integrally with the attachment part 110;
Protruding portion 211 formed on one side is coupled to the mounting portion 120 of the door frame installation portion 100 by a rotating shaft (P) rotatably connected to the outer frame 210 and the rotating shaft (P) A fixed gear 220 fixed to an inner surface of the outer frame 210, a reducer shaft 231 provided therein, and a reducer 230 passing through the mounting unit 120 of the door frame installation unit 100; A motor shaft (not shown) is connected to the reduction gear 230 so that the rotational speed of the motor shaft is reduced, and the fixed gear 220 is coupled to the reduction gear shaft 231 of the reduction gear 230. And a moving gear 250 that rotates on the fixed gear 220, an elastic spring 260 connected at both ends to the mounting portion 120 and the outer frame 210 of the door frame mounting portion 100, and the Installed on the inside of the outer frame 210 and one side of the surface facing the outer frame 210 is cut and the cut portion The convex portion 271 and the concave portion 272 are continuously formed, and the inner frame 270 in which the inclined portion 273 inclined at a predetermined angle θ is successively formed, and one end of the door frame installation portion 100 is formed. Rotating rollers 281 which are rotatably installed on the mounting part 120 and move on the convex part 271, the concave part 272 and the inclined part of the inner frame 270 when the door D is opened or closed are provided. A power transmission part 200 formed of a rotational link 280 installed at the other end;
And a working arm 300 connected to the other end of the outer frame 210 of the power transmission unit 200 and fixed to the door D.

The method according to claim 1,
The mounting unit 120 of the door frame installation unit 100 is provided with a limit switch 130 connected by the forward and reverse rotation motor 240 and the wire (W), the protrusion 211 of the outer frame 210 is provided. The contact wedge (211a) is formed protruding, the door closer, characterized in that the limit switch 130 is in contact with the contact wedge (211a) just before closing the door (D) when the door (D) is closed.

The method according to claim 1,
The operating arm 300 is fixed to the door (D), the fixing bracket 310, the pin mounting portion 311 is formed on one side;
Rotating bracket 320, the end is pin-coupled to the pin installation portion 311 of the fixing bracket 310 is installed to be rotatable;
A rotation rod 330 installed on the rotation bracket 320 and having one end rotatably connected to the other end of the outer frame 210;
A body 341 installed at the end of the fixing bracket 310, a through ring 342 spirally coupled through the body 341, and one end connected to the through ring 342, and the other end is rotated. Pressure regulating means consisting of a coil spring (343) connected to the bracket 320 and the control bolt (344) is helically coupled to the end of the body (341) and in contact with the rotation rod (330) when the door (D) is closed 340; door closer characterized in that consisting of.