KR101035120B1 - Door closer for a fire door - Google Patents

Abstract

The present invention relates to a door closer for a fire door, and more specifically, to overcome the pressure of the wind discharged from the air supply damper of the smoke-free area in the event of a fire and to close the fire door completely to prevent the outflow of smoke or toxic gas. It is related with the door closer for fire doors provided with the closing force reinforcement apparatus which can be prevented.

According to an aspect of the present invention, there is provided a door closer installed on a fire door, wherein a body portion is formed inside the door closer, a central shaft installed to penetrate the side surface of the body portion in a transverse direction, and a gear portion installed at the center of the central shaft; A closing force reinforcing device configured to include a cam driving unit provided on both sides of the gear unit is characterized in that it is integrally formed.

Door closer, fire door, closing force reinforcement device, rack gear, cam drive part

Description

Door closer for a fire door {Door closer for a fire door}

The present invention relates to a door closer for a fire door, and more specifically, to overcome the pressure of the wind discharged from the air supply damper of the smoke-free area in the event of a fire and to close the fire door completely to prevent the outflow of smoke or toxic gas. It is related with the door closer for fire doors provided with the closing force reinforcement apparatus which can be prevented.

In general, smoke control facilities should be installed in buildings such as apartments or hospitals. These smoke control facilities control the smoke generated during a fire to ensure safety in evacuation, prevent loss by smoke, and also provide a clock for fire fighting activities. It is a facility for securing and discharging toxic gas.

In the ventilation area in which the smoke control facility is installed, a fire door is essential to increase the time for people to evacuate and prevent the fire from moving. When the fire door detects the smoke from the smoke detector, The door closer is configured so that it can be closed immediately.

However, when a fire occurs when the fire door inside the smoke control area is opened and the door closer installed in the fire door is closed by the smoke detector, the wind discharged from the air supply damper to maintain the pressure difference between the non-smoke control area and the smoke control area. There was a problem that the fire door could not be closed completely. In this way, if the fire door is not completely closed, it is impossible to form the smoke control area, so toxic gas generated in the smoke control area is spread to all floors, which causes a problem of securing an evacuation passage to the emergency stairs, thereby preventing human accidents caused by toxic gas. Unexpected problem occurs.

As a prior art for solving the above problems, Korean Patent Publication No. 10-0823143 discloses a door closer to secure a stable closed state of the door, the technical configuration is fixed to the door and has a forward rotational force A main body provided with a coaxial shaft; A swinging rock fixed to a pivot shaft provided in the main body; And a fixing bracket fixed to the door frame to form the pivot structure and the link structure through the folding arm, wherein the rotation shaft has an operating gear formed such that a pressing groove is recessed in the outer diameter surface of the disc body. And a support member disposed on one side of the operation gear to press the outer diameter surface of the operation gear, and the rotation shaft rotates in the forward direction so that the pressure groove of the operation member and the operation gear face each other during the closing of the door. When the operating gear is applied to the elastic force of the finger member, the rotating shaft is rotated quickly in the forward direction, characterized in that configured to ensure a stable closed state of the door.

However, the above configuration is not only bad in appearance because the configuration of the operating gear, the support member, etc. is installed on the outside of the door closer, there is a risk of failure or damage caused by the impact from the outside, and must be installed separately There was a problem that is cumbersome.

An object of the present invention devised to solve the above problems is to form a closing force reinforcing device integrally in the interior of the door closer to reduce the pressure of the wind discharged from the air supply damper of the ventilation area without the need for a separate auxiliary device in case of fire. It is to provide a door closer for the fire door that wins and allows the door to be completely closed.

In addition, the present invention can not only enhance the closing force applied to the fire door by two cams as a means for strengthening the closing force of the fire door, but also closed by adding the configuration of the guide rail and the guide ring to the cam configuration Another object is to provide a door closer for a fire door that enables the operation of the power aid to be more precise and accurate.

In addition, the present invention provides a door closer for fire doors that can be operated more efficiently in the operation of the closing force strengthening device in the event of a normal or fire by installing a control means for controlling the operation of the closing force strengthening device in the door frame of the fire door. There is another purpose.

The present invention for achieving the above objects,

A door closer provided in a fire door, wherein the door closer includes a body portion, a central shaft installed to penetrate the side surface of the body portion in a transverse direction, a gear portion provided at the center of the central shaft, and both of the gear portions. It characterized in that the closing force reinforcing device is formed integrally, including a cam driving unit installed on the central shaft.

At this time, the gear portion is characterized in that the main gear is installed in the center of the central shaft, the rack gear is installed in the longitudinal direction of the body portion to be engaged with the main gear, and the spring is provided at one end of the rack gear. .

In addition, a cylinder room into which the rack gear is inserted is installed inside the body part, and a guide washer is installed between the rack gear and the cylinder room.

The cam driving unit includes first and second driving cams installed at left and right sides of the central axis, first and second guides for operating the first and second driving cams, and the first and second driving cams. It characterized in that it comprises a spring installed on one end of the guide.

At this time, a portion of the outer periphery of the first and second drive cam is characterized in that the pressing groove forming the inclined surface of both ends.

In addition, a guide ring is inserted into the first and second guides, and a guide rail for moving the guide ring is formed on the outer periphery of the first and second drive cams.

On the other hand, the door frame of the fire door is characterized in that the control means for controlling the operation of the closing force enhancing device is connected to the door closer by the link member.

According to the door closer for the fire door according to the present invention to prevent the outflow of smoke or toxic gas by simply closing the fire door to overcome the pressure of the wind discharged from the air supply damper of the smoke-free area without the need for a separate auxiliary device in the event of a fire in a simple configuration. Has the effect.

Further, according to the present invention, since the closing force reinforcing device is integrally installed inside the door closer, there is no need to install it separately, and thus the installation is easy, and since the closing force reinforcing device is not exposed, there is little risk of damage due to impact from the outside. Not only can this be improved, but it also has a neat effect.

In addition, according to the present invention further has an effect that the control means for controlling the operation of the closing force strengthening device is installed in the door frame of the fire door to operate the closing force strengthening device more efficiently in normal or fire. .

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

1 is a front view showing a fire door installed with a door closer for fire doors according to the present invention, FIG. 2 is an exploded perspective view showing a closing force reinforcing device among the door closers for fire doors according to the present invention, and FIG. 3 is a closing force shown in FIG. Figure 4 is a front view showing the body portion of the reinforcing device, Figure 4 is a perspective view showing the gear portion and the cam driving portion of the closing force reinforcement device shown in Figure 2, Figure 5a) ~ d) is the operation of the closing force reinforcement device shown in Figure 2 An operational state diagram showing the state.

The present invention relates to a door closer for fire doors that can prevent the outflow of smoke or toxic gas by overcoming the pressure of the wind discharged from the air supply damper of the smoke-free area in the event of a fire and to close the fire door completely, More specifically, the fire door 30 is formed even in a section in which the closing force of the door closer 100 is weakened by integrally forming the closing force reinforcing device 200 inside the normal door closer 100 installed in the fire door 30. It is configured to close stably and reliably.

That is, the configuration of the present invention is characterized in that the closing force reinforcing device 200 is formed integrally inside the conventional door closer 100 installed on the upper portion of the fire door 30, wherein the closing force reinforcing device 200 As shown in FIG. 2, the body 210 includes a body 210, a central shaft 220, a gear 230, and a cam driving unit 240.

First, the body portion 210 serves as a case of the closing force reinforcing device 200, and a plurality of spaces in which the central shaft 220 and the gear unit 230 and the cam driving unit 240 are inserted are formed. On the outside, an oil insertion hole 211 for inserting oil into the inside of the body portion 210 and a valve insertion hole 212 into which a hydraulic valve for adjusting oil pressure of oil in the body portion 210 is inserted. ) Is formed.

In more detail, as shown in FIG. 3, a through hole 213 into which a central axis 220 is inserted is formed at the center of the side of the body portion 210, and a gear portion 230 to be described later is formed at one end thereof. An installation groove 214 is provided in which the cylinder gear 250 into which the rack gear 232 is inserted is installed, and the first and second guides 243 and 244 are formed in the lower portion of the cylinder chamber 250. The guide bracket 215 is supported, and the first end 216a and the second end 216b are installed at the outer ends of the cylinder chamber 250 and the through-hole 213, respectively.

In addition, the central axis 220 is to be inserted and installed in the transverse direction so as to penetrate through the body portion 210 from the side of the body portion 210 to adjust the opening and closing operation of the fire door 30, In more detail, the central shaft 220 is coupled to the link member 20 which is connected between the door closer 100 and the door frame 10 and is opened by folding the link member 20 by rotation. The fire door 30 is to be closed automatically.

In this case, as shown in Figure 4, the central axis 220, the gear portion for rotating the central axis 220 when closing the fire door 30, the section in which the closing force of the fire door 30 is weakened In the cam driving unit 240 for strengthening the rotational force of the central shaft 220 is coupled, first, the gear unit 230 is the main gear 232 is installed in the center of the central shaft 220 and the body portion ( The rack gear 234 is installed in the longitudinal direction inside the 210 and connected to engage with the main gear 232 of the gear unit 230 and the spring 236 installed at one end of the rack gear 234 It is composed of

In more detail, when the fire door 30 is closed, the rack gear 234 rotates the main gear 232 installed in the center of the central shaft 220 so that the central shaft 220 rotates. By transmitting force to the link member 20 that is connected to the) serves to enable the fire door 30 to be closed. That is, one end of the rack gear 234 is inserted into the cylinder chamber 250 to be described later, and the spring 236 is inserted between one end of the rack gear 234 and the cylinder chamber 250. When the fire door 30 is closed, the rack gear 234, which is installed inside the cylinder chamber 250 while compressing the spring 236 when the fire door 30 is opened, is closed by the elasticity of the spring 236. The fire door 30 is closed by rotating the main gear 232 while being pushed out of the cylinder room 250.

On the other hand, the cam driving unit 240 serves to ensure that the fire door 30 is completely closed by reinforcing the rotational force of the central axis 220 in the section that the closing force is weakened when the fire door 30 is closed. That is, as described above, a pressure difference of about 40 to 60 pa is generated between the ventilation area and the non-smoke area by the wind discharged from the air supply damper during the fire, which causes the fire door 30 to not be closed properly. Occurs. Therefore, the cam driving unit 240 operates in a section in which the fire door 30 is not properly closed due to the pressure difference, thereby reinforcing the closing force of the fire door 30 so that the fire door 30 can be completely closed. will be.

The cam driver 240 having such a role is positioned on both left and right sides of the main gear 232 installed on the central shaft 220 so that the first and second driving cams respectively installed on the central shaft 220 may be provided. 241 and 242 and first and second driving cams 241 and 242 installed at positions corresponding to the first and second driving cams 241 and 242 to operate the first and second driving cams 241 and 242. Guides 243 and 244 and springs 243a and 244a are installed at one end of the first and second guides 243 and 244.

In this case, installation grooves 243b and 244b are formed at the other ends of the first and second guides 243 and 244, and guide rings 245 and 246 are provided in the installation grooves 243b and 244b. The guide rings 245 and 246 are respectively inserted and rotated along guide rails 241b and 242b formed at outer peripheries of the first and second driving cams 241 and 242. In addition, at some outer circumferences of the first and second drive cams 241 and 242, pressurized grooves 241a and 242a are formed at both ends thereof to form curved inclinations. The pressurized grooves 241a and 242a are formed. ) Serves to allow the fire door 30 to be completely closed by reinforcing the rotational force of the central axis 220 in a section in which the fire door 30 is not closed well by the pressure difference between the smoke control area and the non-smoke control area.

In more detail, when the fire door 30 is closed, the central axis 220 is rotated by the operation of the above-described gear unit 230, and as the central axis 220 rotates, the left and right of the central axis The first driving cam 241 and the second driving cam 242 coupled to both sides are rotated, and guide rails 241b and 242b protruding from the outer circumference of the first and second driving cams 241 and 242. ), The guide rings 245 and 246 coupled to the first and second guides 243 and 244 rotate. At this time, when the fire door 30 arrives in a section where it is hard to close, the guide rings 245 and 246 are formed on the outer circumference of the first and second drive cams 241 and 242 (pressurized grooves 241a) ( The first and second guides 243 and 243 are formed by elasticity of the springs 243a and 244a installed between the first and second guides 243 and 244 and the guide bracket 215 while entering the 241b. 244 is pushed out of the guide bracket 215 to enhance the rotational force of the central axis 220 by rotating the first and second drive cams (241, 242).

That is, when the fire door 30 is closed, if the angle formed by the fire door 30 and the door frame 10 is within about 20 degrees, the pressure difference between the ventilation area and the non-smoke area and the elastic force of the spring 236 are weakened. The fire door 30 may not be closed properly. Until then, the guide rings 245 and 246 rotate along the guide rails 241 b and 242 b formed on the outer peripheries of the first and second drive cams 241 and 242. And the second guides 243 and 244 remain in a fixed state so as not to transmit rotational force to the central axis 220, and when the fire door 30 reaches a section in which the fire door 30 is not closed well, the guide rings 245 and 246. Spring 243a having the first and second guides 243 and 244 installed at the ends thereof while moving to the guide rails formed in the pressure grooves 241a and 242a of the first and second drive cams 241 and 242. The rotational force of the first and second drive cams 241 and 242 is released from the guide bracket 215 by the elasticity of 244a. By screen it is to enable the door panel 30 can be closed completely by transmitting the rotational force to the central axis 220.

On the other hand, the inner side of the body portion 210 is provided with a cylinder chamber 250 is inserted into one side of the rack gear 234, the cylinder chamber 250 is the forward, backward movement of the rack gear 234 At the same time, the position of the rack gear 234 in the body portion 210 is fixed, and oil is inserted therein, thereby controlling the forward and backward speeds of the rack gear 234. It is.

In addition, a guide bracket 215 is installed inside one side of the first and second guides 243 and 244. The guide brackets 215 and the first and second guides are installed. Springs 243a and 244a are inserted between the ends of the guides 243 and 244 so that the guide rings 245 and 246 are formed in the first and second drive cams 241 and 242, respectively. When moved to is configured to strengthen the rotational force of the central axis 220 by elasticity.

Meanwhile, a first stopper 216a is installed at an outer end of the cylinder chamber 250, and a second stopper 216b is installed at an outer side of the through hole 213 to insert foreign materials into the body 210. It is configured to protect the internal components by preventing them. In addition, a guide washer 219 is inserted between the cylinder chamber 250 and the rack gear 234 to prevent the oil flowing into the cylinder chamber 250 from leaking and at the same time the rack gear 234 It is preferable to be able to disperse the shock received by the cylinder chamber 250 by the forward and backward movements.

On the other hand, the control means 300 may be installed in the door frame 10 of the fire door 30, the control means 300 is connected to the door closer 100 by the link member 20 is reinforced closing force To electrically control the operation of the device 200. That is, by controlling the closing force reinforcing device 200 by using the control means 300, the closing force reinforcing device 200 is not normally operated so that the fire door 30 is opened without a separate door stopper. When the fire occurs, by operating the control means 300, the closing force reinforcement device 200 is to operate so that the fire door 30 can be completely closed automatically.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the door closer 100 for the fire door according to the present invention.

In general, the door closer 100 is installed on the top of the door to operate the link member 20 is installed between the door closer 100 and the door frame 10 by the rotational force to allow the door to close automatically. Recently, the closing force reinforcing device 200 for reinforcing the closing force of the door closer 100 has been variously developed. That is, the door closer 100 has the strongest closing force when the door is opened to the maximum, and the closing force is weakened as the door is gradually closed. Particularly, the door closer 100 used for the fire door 30 has a ventilation area. There is a problem that the door is not closed well due to the pressure difference between the non-smoke area.

In order to solve this problem, various auxiliary devices for reinforcing the closing force of the door closer 100 are being developed. Most of them are separately installed outside the door closer 100, which is cumbersome to install and the risk of failure is large. But aesthetically, there was a disadvantage.

The present invention is characterized in that the closing force reinforcing device 200 is integrally formed in the interior of the door closer 100 to reinforce the closing force of the door closer 100 in order to solve this problem. Looking at the operation process of the closed force reinforcement device 200 is applied as follows.

First, in the state where the fire door 30 is closed, as shown in a) of FIG. 5, the rack gear 234 protrudes from the cylinder chamber 250 and is engaged with the main gear 232 of the gear part 230. The guide rings 245 and 246 of the cam driving unit 240 are positioned in the guide rails 241b and 242b formed in the pressing grooves 241a and 242a of the first and second driving cams 241 and 242. At this time, the spring 236 is provided between the end of the rack gear 234 and the cylinder chamber 250, and the spring (between the first and second guides 243,244) and the guide frame 215 ( 243a and 244a are all maintained in the maximum tensioned state.

Next, when the user opens the fire door 30, as shown in b) of FIG. 5, the rack gear 234 moves into the cylinder chamber 250 while compressing the spring 236 coupled to one end. At the same time, the central axis 220 is rotated, and the springs 243a and 244a are coupled to the ends of the first and second guides 243 and 244 as the central axis 220 rotates. ) Is located in the guide rails (241b, 242b) formed on the outer periphery of the first and second drive cams (241, 242) from the pressing grooves (241a, 242a forming the slope of the curved surface) while compressing the fire door ( 30 is the maximum open state of the spring 236 provided between the rack gear 234 and the cylinder chamber 250, the first and second guides 243, 244 and the guide frame 215 The springs 243a and 244a provided therebetween are in the maximum compressed state.

In this case, in order to keep the fire door 30 in an open state, the control means 300 installed on the door frame 10 is operated to link the link member 20 installed between the control means 300 and the door closer 100. By fixing, the fire door 30 can be fixed. That is, when the control unit 300 is operated to fix the link member 20, the central shaft 220 connected to the link member 20 does not rotate, and the gear unit 230 connected to the central shaft 220 also operates. Since it is fixed, the fire door 30 is fixed.

If an emergency situation such as a fire occurs, or if the fire door 30 is to be closed for other reasons, the control means 300 is operated to release the link member 20 from being fixed or the user is forced to pull the door. The fire door 30 is closed. At this time, the rack gear 234 is moved out of the cylinder chamber 250 by the elasticity of the spring 236 that has been compressed, as shown in c) of FIG. The rack gear 234 is engaged with the main gear 232 installed on the central shaft 220 to rotate the main gear 232 and is connected to the central shaft 220 by rotating the central shaft 220. By operating the link member 20 to allow the fire door 30 to close automatically.

In addition, the first driving cam 241 and the second driving cam 242 are also rotated by the rotation of the central axis 220, wherein the guide rings 245 and 246 are the first and second driving cams 241. The first and second guides 243 and 244 maintain the compressed state of the springs 243a and 244a in a state of only rotating along the guide rails 241b and 242b formed at the outer circumference of the head 242. The rotational force is not added to the central axis 220.

Next, when the fire door 30 is almost closed and close to the door frame 10, the elasticity of the spring 236 is weakened and at the same time, the fire door 30 is not closed well by the pressure difference between the smoke control area and the non-smoke control area. At this time, as shown in d) of FIG. 5, guide rings 245 and 246 provided at ends of the first and second guides 243 and 244 are outside the first and second drive cams 241 and 242. Springs that are installed and compressed between the end portions of the first and second guides 243 and 244 and the guide frame 215 while descending to the pressing grooves 241a and 242a along the inclined portions of the curved surface ( The first and second guides 243 and 244 protrude in the direction of the central axis 220 by the elasticity of the 243a and 244a to increase the rotational force of the first and second drive cams 241 and 242. Since the increased rotational force is transmitted to the central axis 220, the closing force of the fire door 30 is strengthened so that the fire door 30 can be completely closed. All.

As described above, the fire door door closer 100 according to the present invention does not need to be installed separately by integrally installing the closing force reinforcing device 200 in the interior of the door closer 100, and the installation is easy and the closing force reinforcing device Since the 200 is not exposed, there is a low risk of damage due to the impact from the outside, and the fire door 30 overcomes the pressure of the wind discharged from the air supply damper of the combustion area without the need for a separate auxiliary device in case of fire with a simple configuration. By closing it completely, there are various advantages such as preventing external leakage of smoke or toxic gas.

Although the above embodiments have been described with respect to the most preferred examples of the present invention, it is not limited to the above embodiments, and it will be apparent to those skilled in the art that various modifications are possible without departing from the technical spirit of the present invention.

The present invention relates to a door closer for a fire door, and more specifically, to overcome the pressure of the wind discharged from the air supply damper of the smoke area without a separate auxiliary device in the event of a fire, and to close the fire door completely to the outside leakage of smoke or toxic gas It relates to a door closer for a fire door is provided with a closing force reinforcement device that can prevent the.

1 is a front view showing a fire door is installed a door closer for fire doors according to the present invention.

Figure 2 is an exploded perspective view showing a closing force reinforcing device of the door closer for fire doors according to the present invention.

Figure 3 is a front view showing a body portion of the closing force enhancing device shown in FIG.

Figure 4 is a perspective view of the gear portion and the cam driving portion of the closing force enhancing device shown in FIG.

Figure 5a) ~ d) is an operating state diagram showing the operating state of the closing force enhancing device shown in FIG.

Explanation of symbols on the main parts of the drawings

10: door frame 20: link member

30: fire door 100: door closer

200: closing force reinforcing device 210: body portion

220: central axis 230: gear portion

240: cam drive part 250: cylinder room

300 control means

Claims (7)

In the door closer installed in a fire door, Inside the door closer, a body portion, a central shaft installed to penetrate the side portion of the body portion in the transverse direction, a gear portion provided at the center of the central shaft, and a cam driving portion provided at both of the gear shafts The closing force reinforcing device is configured to be integrally formed, The cam driving unit includes first and second driving cams disposed on both left and right sides of the central axis, first and second guides for operating the first and second driving cams, and the first and second guides. A door closer for fire doors, comprising a spring installed at one end. The method of claim 1, The gear part is a fire gear door comprising a main gear installed in the center of the central shaft, a rack gear installed in the longitudinal direction of the body portion to be engaged with the main gear, and a spring installed at one end of the rack gear. Door closer. 3. The method of claim 2, The inner side of the body portion is a cylinder chamber is inserted into the rack gear is installed, the door closer for fire doors, characterized in that the guide washer is installed between the rack gear and the cylinder chamber. delete The method of claim 1, The door closer for the fire door, characterized in that the pressing groove forming the inclined surface of both ends of the outer peripheral portion of the first and second drive cam. The method of claim 5, A guide ring is inserted into the first and second guides, and a guide rail for moving the guide ring protrudes from the outer circumference of the first and second drive cams. The method according to any one of claims 1 to 3, 5 and 6, The door closer of the fire door, characterized in that the control means for controlling the operation of the closing force enhancing device is connected to the door closer by the link member.

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