KR100703009B1 - Automatic fire shutter closing apparatus - Google Patents

Abstract

The present invention relates to an automatic fire shutter closing device, and more particularly, to an automatic fire shutter closing device capable of accurately stopping a descending shutter at a constant height during a shutter closing process.

Fire prevention shutter automatic closing device of the present invention, a reduction motor consisting of a DC motor for generating a rotational force and a reduction gear for reducing the rotational speed of the electric DC motor, a worm that is connected to the output shaft of the reduction gear motor, The worm wheel, which is rotated in engagement with the worm and has a pair of pressing members installed on the fixed shaft on the upper side thereof, and the plate-shaped moving shaft and the plate-shaped movement, which have the contact portion which is in contact with the pressing member on the upper worm wheel. A brake lever operating mechanism comprising a cylindrical moving shaft screwed to the end of the shaft and having a compression spring installed on the outer surface thereof, and a lever operating rod coupled to the front end of the aforementioned cylindrical moving shaft, and downwardly penetratingly coupled to the aforementioned plate moving shaft. A micro switch that generates contact signal by contact contact lever contacting contact bolt, and electric micro It consists of a switch and a control box in which a control unit for generating a signal for controlling the operation and stop of the reduction gear motor according to the smoke detection or heat detection signal from the outside.

Worm, worm wheel, reduction motor, brake lever, shutter, lever operating rod, moving shaft

Description

Automatic fire shutter closing apparatus

1 is a view schematically showing the installation state of the fire shutter can be applied to the automatic closing device according to the present invention.

Figure 2 is a perspective view schematically showing the internal structure of the automatic closing device shown in FIG.

3 is a plan view showing a state in which the lever operating rod is advanced to release the braking state of the electric closing machine.

4 is a plan view showing a state in which the lever operating rod is retracted to return the electric closing machine to the braking state.

Figure 5 is a perspective view showing a pressing member fixed to the upper portion of the worm wheel and the worm wheel to advance the lever operating rod.

※ Explanation of code about main part of drawing ※

10: shutter 11: magnet

20: guide rail 30: shutter box

31: reed switch 40: electric switch

42 brake lever 44 gear shaft

60: fire detector 70: interlock controller

80: chain 100: automatic closing device

110: DC motor 111: reducer

112: reducer fixing member 113: worm support member

115: manual operation wheel 120: worm wheel

121: pressing member 122: worm wheel fixed shaft

130: housing front wall 131: housing rear wall

140: plate moving shaft 141: cylindrical moving shaft

142: lever operating rod 143: plate-shaped moving shaft support member

144: compression spring 145, 146: contact bolt

150, 151: micro switch 160: control box

The present invention relates to an automatic fire shutter closing device, and more particularly, to an automatic fire shutter closing device capable of accurately stopping a descending shutter at a constant height during a shutter closing process.

In general, crime prevention and fire prevention shutters installed in public buildings or facilities such as department stores, shopping malls, subways, etc. are often closed in case of a fire and block the area where the fire occurred. It is used to prevent it.

In case of fire, various means are provided to minimize the transition of fire by initially blocking the fire area and other areas. In case of fire in the building, DC solenoid operates according to signals generated by various sensors such as smoke sensor and heat sensor, and the electric switch opens and lowers the brake lever, causing the shutter plate to descend by its own weight. When the plate is to be returned to its original position, the brake return shaft connected to it is pulled by the suction action of the movable iron core by the AC recovery solenoid operated by separate AC power, and the shutter plate is wound by the reverse rotational power of the driving motor. It is stored inside.

Such a simple fire prevention shutter has a blocking effect in the event of a fire, but it is impossible to escape if there is a person inside. Therefore, there is disclosed a structure having an emergency door on one side of the fire shutter (Korea Utility Model Publication No. 1993-6476). ). The above-mentioned Korean Utility Model Publication No. 1993-6476 includes a shutter box equipped with a winding drum and a driving device, a guide rail, and a shutter plate which is coupled with a plurality of shutter members. The building shutter was provided with a hinge that is joined to each member through the hinge plate and integrally provided with an emergency door that is elevated and bent in the same width, and the lowering position control forms a protrusion so that it has a locking function. A hinge was provided to allow the emergency door to close automatically, and a torsion spring was used inside.

In this structure, however, the unit weight of one shutter member is usually 7-10 kg, and when it is usually assembled in several tens or hundreds or more, the total weight is at least tens or hundreds of kilograms. When the distance falls naturally, tremendous impact energy is generated at the lowest point, so that the lower ones do not endure and accumulate more than the lower slats. Therefore, although there is an emergency door, the slat member is bent during the actual fire, and the door cannot be opened, which has the adverse effect of expanding the casualties.

The reason for this is that the conventional closure is provided with only one DC solenoid to control the opening and closing of the electric switch, and when the shutter plate lowering reaches a certain position, appropriate control means for preventing the lowering is insufficient.

In order to solve the above problem, Korean Patent No. 146318 arranges the brake return shaft and the release shaft in series on the same axis, but arranges the DC solenoid and the limit switch in pairs on both sides thereof, and arranges the AC solenoid on the upper side thereof. A configuration is disclosed in which the brake function for the motor is activated when the shutter plate reaches a constant lowering position by allowing the interlocking operation. In addition, Korean Patent No. 307745 has a brake return and release shaft which is operated back and forth by a control motor and a cam mechanism at the bottom of the case, and when the shutter plate reaches a constant lowered position by arranging a return operation part by a DC solenoid and interlocking with each other. A configuration is disclosed in which a brake function for a motor is activated.

However, in the above patent, there are features that solve various problems of various control devices for opening and closing the fire shutter, but it is economical problem that the cost should be reduced as much as possible while being smaller and lighter, that is, a plurality of solenoids are required or There is a demand for minimizing problems such as the need for a solenoid and a motor at the same time, and a problem of complex assemblability caused by a complicated arrangement of several components and a malfunction problem among a plurality of components.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and its main object is to provide an automatic fire shutter closing device capable of precisely controlling the first lowering of the shutter and the lowering to the floor.

It is another object of the present invention to provide a fire prevention shutter automatic closing device that has fewer parts than the prior art and can be improved in assembly, and also the opening and closing operation can be performed accurately.

In order to achieve the above object, the present invention, a reduction motor comprising a direct current motor for generating a rotational force and a reduction gear for reducing the rotational speed of the electric direct current motor, a worm connected to the output shaft of the reduced speed motor, The worm wheel has a pair of pressing members which are rotated in engagement with one worm and installed on the fixed shaft on the upper side thereof, and the plate-shaped moving shaft which has the contact portion which is in contact with the pressing member of the upper worm wheel. A brake lever operating mechanism comprising a cylindrical moving shaft screwed to the tip of the moving shaft and having a compression spring installed on the outer surface, and a lever operating rod coupled to the tip of the cylindrical moving shaft, and penetrating downwardly to the plate moving shaft. The micro switch that generates contact signal when the contact control lever contacts the contact bolt And a control box incorporating a micro switch and a controller for generating a signal for controlling the operation and stop of the reduction motor in response to a smoke detection or heat detection signal from the outside.

In the above-described configuration, the pressing member is made by screwing a bearing or a roller, and a manual operation wheel may be installed to manually rotate the worm in the event of an abnormality between the output shaft of the reduction motor and the worm.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the fire door shutter automatic closing device of the present invention.

1 is a view schematically showing an installation state of a fire prevention shutter that can be implemented an automatic closing device according to the present invention. As shown in Figure 1, the shutter 10 is installed in the passage of the building, the shutter box 30 is installed on the ceiling of the passage, the guide rail for guiding the lifting of the shutter 10 on both side walls of the passage ( 20) is installed. The shutter 10 is opened by being wound around a winding drum (not shown) provided in the shutter box 30, and closed by being lowered by its own weight in the winding drum. An emergency door (not shown) may be installed below the shutter 10 to allow a person to enter and exit even when the shutter 10 is closed.

The shutter box 30 is also provided with an electric switch 40 which provides an opening power to the shutter 10, and a chain 80 is connected to the gear shaft 44 of the electric switch 40. The electric switch 40 is provided with a brake lever 42 to prevent the shutter 10 from falling due to its own weight, and the brake lever 42 is normally installed on the electric switch 40 while maintaining a braking state. When pushed forward by the lever operating rod 142 of the closing device 100 is in a break state.

In the drawings, reference numeral 60 denotes a fire detector having a smoke sensor and a heat sensor for detecting the occurrence of a fire, and 70 denotes an interlock controller. In the event of a fire, the fire detector 70 is an interlock controller. Sending a detection signal to the 70, the interlock controller 70 again sends a control signal to the automatic closing device 100, whereby the lever operating rod 142 pushes the brake lever 42 by the shutter (10) ) Is closed.

The mechanism for operating the brake lever is, as shown in Figs. 2 to 4, one end is exposed to the outside through a circular through hole formed in the housing front wall 130, and the other end is a plate-shaped moving shaft 140 is screwed and one end thereof is a cylindrical moving shaft 141 connected to the lever operating rod 142 via a plate, and a compression spring for applying a force to always retract the lever operating rod (144) ) The plate-shaped moving shaft 140 is screwed to the front of the cylindrical moving shaft 141, the rear portion of the plate-shaped moving shaft back and forth through the through hole formed in the middle portion of the support member 143, It is inserted into the through hole of the support member 143 to move. In addition, the plate-shaped moving shaft 140, as shown in the perspective view of Figure 2, the contact bolts (145, 146) in contact with the contact operation lever of the micro switch 150, 151 to be described later downwards It is penetrated through.

On the other hand, the rear of the housing is provided with a reduction motor composed of a DC motor 110 for providing a forward force to the lever operating rod 142 and a reducer 111 to reduce the rotational speed of the DC motor 110 at an appropriate ratio. And, the worm 125 is connected to the output shaft of the reduction motor to rotate the worm wheel 120 counterclockwise.

The reduction motor comprising a DC motor 110 and the reduction gear 111 is fixed to the reduction gear fixing member 112, one side end of the worm 125 is rotatably mounted to the worm supporting member 113. . In addition, when the reduction motor is inoperable due to an abnormal power supply or other abnormal occurrence between the output shaft of the reduction motor and the worm 125, the worm 125 and the worm wheel 120 may be manually rotated. Manual operation wheel 115 is installed so that.

As shown in FIG. 5, the worm wheel 120 has a cylindrical pressing member installed at an upper portion of the worm wheel 120 so as to face each other with respect to the worm wheel fixing shaft 122 to advance the plate-shaped moving shaft 140. 121 and 121 are provided. These pressing members 121 and 121 are coupled to the worm wheel 120 by means of bolts such as bearings or rollers, and the outer side of the cylindrical moving shaft 141 by rotation of the worm wheel 120 in the counterclockwise direction. The pressing member contact portion 140a of the plate-shaped moving shaft 140 is pressed against the elastic force of the installed compression spring to move the moving shaft in the forward direction.

On the other hand, the bottom of the housing is provided with a switch, that is, a micro switch (150, 151), the contact is installed on the power line of the direct-current motor 110 of the reduction motor, respectively, these micro The contact manipulation lever of the switch operates the micro switches 150 and 151 by contact with the contact bolts 145 and 146 described above. With this structure, as the lever operating rod 142 is advanced or retracted, the contact operating lever of the micro switches 150 and 151 and the contact bolts 145 and 146 are brought into contact with or released from each other. The contacts of the micro switches 150 and 151 are turned on or off. In addition, a control unit for driving and stopping the reduction motor is built in one side of the housing rear wall 131 by the signal from the interlock controller 70 and the signal from the micro switches 150 and 151. The control box 160 is installed.

Looking at the mechanical operation of the automatic closing device of the present invention having the above-described configuration, as shown in FIG. 4, the worm is operated as the deceleration motor is operated by the smoke detection signal from the smoke detection sensor of the fire detector 60 in the state shown in FIG. When 125 rotates the worm wheel 120 in the counterclockwise direction, the pressing member 121 installed on the upper portion of the worm wheel 120 is also rotated counterclockwise around the worm wheel fixing shaft 122. . Thereafter, as shown in FIG. 3, the pressing member 121 rotated in the counterclockwise direction comes into contact with the pressing member contact portion 140a of the plate-shaped moving shaft 140 and continues against the elastic force of the compression spring 144. By applying a rotational force to the contact portion 140a to advance the plate-shaped moving shaft 140, the lever operating rod 142 is moved forward to push the brake lever 42 of the electric switchgear 40, the electric switchgear 40 The braking is released. At this time, as the plate-shaped moving shaft 140 is advanced, the contact bolt 145 which is penetrated downwardly to the plate-shaped moving shaft 140 is in contact with the contact manipulation lever of the micro switch 150, the micro switch 150 By operating and stopping the reduction motor, the lever operating rod 142 maintains the forward state.

When the lever operating rod 142 is advanced in this way and the electric switch 40 is in the un-brake state, as shown in FIG. 1, the shutter 10 wound on the winding drum is lowered by its own weight and wound up. One magnet 11 is provided at one end of the shutter 10 wound on the drum in consideration of the position where the shutter 10 is first stopped. In addition, the reed switch 30 is installed in the upper part of the guide rail 20 near the exit of the shutter box 30 through which the shutter 10 is discharged. A portion of the shutter 10 provided with 11 is in contact with the reed switch 31 described above. When the magnet 11 and the reed switch 31 come into contact with each other, the reed switch 31 operates to apply a contact signal to the control box 160 of the automatic closing device 100 via the interlocking controller 70. The worm wheel 120 rotates again in the counterclockwise direction by the rotation of the worm 125 to operate the pressing member, which is maintained in contact with the contact portion 140a as shown in FIG. As the 121 passes over the contact portion 140a, the lever operating rod 142 retreats. As the lever operating rod 142 is retracted, the brake lever 42 of the electric switch 40 is returned to its original state, and the electric switch 40 is brought into a breaking state again. At this time, as the plate-shaped moving shaft 140 retreats, the contact bolt 146 penetrated downwardly to the plate-shaped moving shaft 140 comes into contact with the contact manipulation lever of the micro switch 151, and the micro switch 151 Is operated to stop the reduction motor, so that the lever operating rod 142 maintains the retracted state.

When the lever operating rod 142 is retracted as described above, the electric switch 40 is in a braking state, and the shutter 10 stops at the first stop line, so that evacuators can quickly evacuate from the fire zone.

On the other hand, when the fire continues to proceed with the shutter 10 stopped at the primary stop line and the heat detection sensor of the fire detector 60 detects heat, the heat detection signal is controlled via the interlock controller 70. When the worm wheel 125 is rotated by rotating the worm wheel 120 counterclockwise as it is applied to the box 160 and the deceleration motor is operated again, the pressing member installed on the upper part of the worm wheel 120 ( 121 is also rotated counterclockwise about the worm wheel fixing shaft 122. Thereafter, as shown in FIG. 3, the pressing member 121 rotated in the counterclockwise direction comes into contact with the pressing member contact portion 140a of the plate-shaped moving shaft 140 and continues against the elastic force of the compression spring 144. By applying a rotational force to the contact portion 140a to advance the plate-shaped moving shaft 140, the lever operating rod 142 is moved forward to push the brake lever 42 of the electric switchgear 40, the electric switchgear 40 The braking is released. At this time, as the plate-shaped moving shaft 140 is advanced, the contact bolt 145 which is penetrated downwardly to the plate-shaped moving shaft 140 is in contact with the contact manipulation lever of the micro switch 150, the micro switch 150 Is operated to stop the reduction motor, so that the lever operating rod 142 maintains the forward state.

As the electric switch 40 is again un-brake, the shutter 10 stopped at the first stop line is lowered again by its own weight, and when the shutter 10 descends to the vicinity of the floor, the electric switch is lowered. The operation of the limit switch installed in the 40 to apply a signal to the automatic closing device 100 described above. When the deceleration motor is operated by the application of this signal, the worm wheel 120 rotates again in the counterclockwise direction by the rotation of the worm 125. As shown in FIG. The lever operating rod 142 is retracted as the pressing member 121 which has maintained the contact state passes over the contact portion 140a. As the lever operating rod 142 is retracted, the brake lever 42 of the electric switchgear 40 is returned to its original state, and the electric switchgear 40 is brought back to a breaking state, so that the lowering of the shutter 10 is lowered from the bottom surface. By stopping safely, tremendous impact energy is generated in the bottom surface, which is the lowest point when falling naturally due to its own weight, thereby preventing distortion such as bending of the slat members constituting the shutter 10.

As described above, according to the automatic fire shutter closing device of the present invention, the fire shutter can be temporarily stopped at a position of the first stop line, which is a predetermined height, thereby improving safety of evacuees evacuating from the fire area. In addition, since the components constituting the automatic closing device can be simplified as compared with the related art, not only can the manufacturing cost be reduced, but also the parts are small, the assemblability can be improved, and the opening and closing operation can be performed accurately. There is.

Claims (3)

A reduction motor comprising a DC motor 110 for generating rotational force and a reduction gear 111 for reducing the rotational speed of the electric DC motor; The worm 125 is connected to the output shaft of the reduction motor and rotated, The worm wheel 120 is rotated in engagement with the worm 125 described above, and has a pair of pressing members 121 installed on the fixed shaft 122 to face each other. The plate-shaped moving shaft 140 having the contact portion 140a contacting the pressing member 121 of the upper worm wheel 120 is screwed to the distal end of the plate-shaped moving shaft, and a compression spring 144 is installed on the outer surface. A brake lever operating mechanism including a cylindrical moving shaft 141 and a lever operating rod 142 coupled to a tip of the cylindrical moving shaft described above; Micro-switches 150 and 151 which contact point contact levers contact the contact bolts 145 and 146 downwardly penetrating the plate-shaped moving shaft 140 to generate a contact signal; And a control box 160 having a built-in microcontroller 150 and 151 and a controller for generating a signal for controlling the operation and stop of the reduced speed motor according to the smoke detection or heat detection signal from the outside. , The above-described brake lever operating mechanism is guided by a circular through hole formed in the front wall of the housing and the plate-shaped moving shaft support member 143 and horizontally moved back and forth. The fire prevention apparatus according to claim 1, further comprising a manual operation wheel (115) for manually rotating the worm (125) in the event of an abnormality of the device between the output shaft of the electric reduction gear and the electric worm (125). Shutter automatic closing device. The fire prevention shutter automatic closing device according to claim 1 or 2, wherein the pressing member (121) is formed by screwing a bearing or a roller.

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