KR20160133208A - Falling speed control system - Google Patents

Falling speed control system Download PDF

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Publication number
KR20160133208A
KR20160133208A KR1020150065944A KR20150065944A KR20160133208A KR 20160133208 A KR20160133208 A KR 20160133208A KR 1020150065944 A KR1020150065944 A KR 1020150065944A KR 20150065944 A KR20150065944 A KR 20150065944A KR 20160133208 A KR20160133208 A KR 20160133208A
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South Korea
Prior art keywords
safety curtain
oil
safety
speed
curtain
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KR1020150065944A
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Korean (ko)
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KR101719600B1 (en
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권경인
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(주)경일알텍
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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers
    • A62C2/10—Fire-proof curtains
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G5/00—Screens; Draught-deflectors
    • A47G5/04—Fire screens
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63J—DEVICES FOR THEATRES, CIRCUSES, OR THE LIKE; CONJURING APPLIANCES OR THE LIKE
    • A63J1/00—Stage arrangements
    • A63J1/02—Scenery; Curtains; Other decorations; Means for moving same

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Lowering Means (AREA)

Abstract

The present invention relates to a falling speed control system to control a self-weight falling speed of a safety curtain, to shut off a stage from seats when an emergency situation like fire occurs in a place including a stage such as various kinds of theaters or meeting halls, etc., so as to ensure an evacuation time. According to the present invention, the system comprises: a hydraulic brake to gradually decelerate a rotation speed of a wire drum winding an operation wire connected to a safety curtain in order to ensure a minimum time capable of allowing evacuation to persons to be evacuated to the outside of a stage while quickly deploying the safety curtain through self-weight falling.

Description

{FALLING SPEED CONTROL SYSTEM} [0001] The present invention relates to a safety curtain falling rate control system using a hydraulic brake,

The present invention relates to a safety curtain for controlling the self-falling speed of a safety curtain, which is capable of securing a time for escape by blocking the stage and the audience seat when an emergency situation such as a fire occurs, A falling speed control system,

The speed of the wire drum wound around the safety curtain connected to the safety curtain is monitored step by step so that the safety curtain can be rapidly deployed through the falling of the weight and the minimum time for the evacuator to escape out of the stage is ensured And more particularly to a falling speed control system of a safety curtain comprising a hydraulic brake.

In general, a theater where performances of various genres such as drama and opera are performed, and a meeting place where various events are performed are made up of a stage and audience seats in which the audience seats to observe performances and events on this stage.

In this stage, various lighting devices, fireworks, flames, etc. are installed and used for performances and performances to produce dramatic effects. As these instruments are installed on the stage, the risk of fire is latent.

Therefore, when a dangerous situation such as a fire occurs on the stage in recent years, a safety curtain spreads on the front of the stage, thereby blocking time between the stage and the audience, securing time for the audience to evacuate and preventing a fire from spreading .

Unlike ordinary stage curtains, these safety curtains are installed at the upper part of the stage so that, when an emergency occurs, the safety curtains are automatically installed so that the safety curtains must be quickly installed to prevent the fire from being scattered.

However, safety curtains are made of special materials such as fire-proof materials and they are very large in size, and their weight is heavy enough to reach hundreds of kilograms to several tons, so that the free fall speed is very fast, A technique of decelerating at a constant height after a rapid fall so as not to be injured by collision with a safety curtain is required.

In addition, since the safety curtain is required to perform safety inspection at regular intervals in accordance with its characteristics of use, it is very important to control the falling speed because the structure is likely to be damaged if the speed of the safety curtain is not controlled.

Especially, for the rapid deployment of safety curtains and safe fall, it is allowed only in the case of installing safety curtains that satisfy the conditions of minimizing the opening time and the final speed reducing condition when falling down in various parts of Europe. As the legislation is being prepared, there is a need for speed control technology for safety curtains.

As a related art for controlling the falling speed of a safety curtain, there are disclosed related arts as disclosed in Published Unexamined Patent Application No. 10-2003-0070527 (published on Aug. 30, 2003), Registered Patent No. 10-1058484 (Registered on Aug. 16, 2011) 10-1999-0069254 (Publication date 1999.09.06.), Registration Practical Utility Model 20-0448903 (Registration date 2010.05.20.), Etc.,

The above-described techniques are techniques for constantly reducing the rotational speed of a wire drum around which a wire connected to a safety curtain is wound using a centrifugal brake or a disc brake.

However, according to the above-described techniques, when the safety curtain falls, the falling speed is kept constant and decelerated,

It is not a technology to control the deceleration of the falling speed by the height interval when reaching the stage or the ground in order to keep the speed fast during the initial dropping for the rapid deployment of the safety curtain. There is a limit to solving the purpose.

Accordingly, the present invention has been made to solve the above-mentioned problems,

In addition to the rapid deployment of safety curtains, it is possible to decelerate to a slower speed at a certain height from the ground to complete the fall, thereby ensuring that the audience is able to evacuate, while dropping the safety curtain drop system, Which is capable of gradually controlling the dropping speed of the safety according to the height of the safety curtain.

In particular, according to the present invention, the speed of falling of the safety curtain is decelerated and controlled in steps, thereby preventing the safety curtain from clogging the stage and the audience seat, preventing the underexposure that has not yet been evacuated and preventing the safety curtain from escaping due to collision with the safety curtain Which is capable of decelerating and controlling the rotation speed of the wire drum by the hydraulic brake so as to prevent a self-injury.

The present invention also relates to a method of controlling the speed of the impeller which rotates together with the wire drum by controlling the discharge flow rate of the oil so that the speed control of the hydraulic brake can be stably performed by mixing the principle of Pascal and the principle of the water pump, And a control device for controlling the falling speed of the safety curtain.

In addition, the present invention provides a solenoid valve comprising a plurality of open / close valves for opening / closing a plurality of oil outlets so as to facilitate deceleration and control of a falling safety curtain at a desired speed by varying the discharge flow rate of the oil controlled by the control unit And an object of the present invention is to provide a falling speed control system of a safety curtain.

In the meantime, according to the present invention, since the closing operation of the opening / closing valve is precisely performed at a desired height, and a limit switch for measuring the height through the number of revolutions of the wire drum to prevent the deceleration failure or the malfunction of the hydraulic brake, And to provide a speed control system.

The present invention also provides a safety curtain falling speed control system capable of safely controlling the speed at which the safety curtain reaches the ground after falling and securing the safety stability of the safety curtain and preventing a human accident due to a rapid fall. And to provide the above objects.

In order to achieve the above-mentioned object, the safety control system of the safety curtain according to the present invention comprises:

This is for controlling the falling speed of the safety curtain installed on the stage when the emergency curtain falls due to its own weight,

A safety curtain installed on the stage; And

A wire drum on which a driving wire connected to the safety curtain is wound,

And driving means including a hydraulic brake for gradually reducing the rotational speed of the wire drum when the safety curtain falls.

In the safety control system of the safety curtain according to the present invention,

The hydraulic brake

A housing having an oil inflow portion, a second oil discharge portion, and an oil retention space formed between the oil inflow portion and the oil discharge portion; and a housing connected to the wire drum to rotate together with the wire drum in the oil retention space A hydraulic motor composed of an impeller,

And a control unit installed on the oil discharge unit to control the rotational speed of the impeller by controlling the flow rate of the oil discharged to the oil discharge unit in a stepwise manner.

Further, in the safety control system of the safety curtain according to the present invention

The control unit

A valve body connected to the oil discharge portion and having a plurality of oil discharge ports,

And a solenoid valve comprising an open / close valve provided to open and close the oil discharge port, respectively.

In addition, in the safety control system of the safety curtain according to the present invention

Wherein the driving means includes a limit switch for detecting the number of revolutions of the wire drum and for sequentially closing the opening / closing valve according to a drop height of the safety curtain.

 The safety curve control system of the safety curtain according to the present invention controls the speed of rotation of the wire drum on which the driving wire is wound through the hydraulic brake step by step in decelerating and controlling the falling speed of the safety curtain, It is a very useful invention that can safely land the safety curtain when it reaches the stage or the ground, while preventing the safety curtain from being opened very quickly, and satisfying both the prevention of fire spread and the safe evacuation of those concerned.

In particular, since the safety curtain falling speed control system according to the present invention decelerates and controls the safety curtain in a stepwise manner from a predetermined height under the primary control of the free fall speed of the safety curtain, There is an effect that stable operation can be achieved.

In addition, the falling speed control system of the safety curtain according to the present invention is easy to install and check, has less risk of malfunction, and is easy and accurate to control the falling speed and deceleration section height, And it is an invention having excellent versatility and utility.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view schematically showing a safety curtain falling speed control system according to the present invention; FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a safety curtain descent speed control system,
3 is a view for explaining a control part of a hydraulic brake in a safety curtain falling rate control system according to the present invention.
FIGS. 4 to 6 are front views showing an operation state of the safety curtain by the falling height section in the safety curtain falling speed control system according to the present invention. FIG.
Fig. 7 is a photograph of a prototype of the present invention. Fig.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the numerals of the tens and the digits of the digits, the digits of the tens, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

 In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

It is to be understood that the first to second aspects described in the present specification are merely referred to in order to distinguish between different components and are not limited to the order in which they are manufactured, It may not match.

In describing the falling rate control system of the safety curtain according to the present invention, for the sake of convenience, when an unambiguous approximate direction reference is specified with reference to FIG. 1, the upward, downward, leftward and rightward directions Unless otherwise specified in the Detailed Description of the Invention and in the claims that relate to the other Drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a safety curtain falling speed control system according to the present invention will be described with reference to the accompanying drawings.

The safety curtain falling rate control system according to the present invention is a safety curtain falling rate control system in which a safety curtain installed at the stage top (at a height of about 11 m or more on the stage) in an emergency situation such as a fire, To control the falling speed thereof,

A safety curtain 10 installed on an upper part of a stage S and a safety curtain 10 for controlling the safety curtain 10 to move up and down as well as to control the weight of the safety curtain 10 And driving means (20) capable of decelerating and controlling the speed at the time of free fall.

The safety curtain 10 is made of a special flame retardant or nonflammable material and is connected to the driving means 20 provided on the stage upper structure S1 so that the safety curtain 10 is raised at a low speed through the driving means 20, Or lowered.

2, the driving means 20 of the present invention includes a driving motor 21 for controlling the rising and falling of the safety curtain 10, a wire drum 22 connected to the driving motor 21 and rotated A driving wire 22a connected to the safety curtain 10 and wound around the wire drum 22 and the like for driving the driving motor 21 and the wire drum 22, Various speed reducers 22B and the like are provided,

And a hydraulic brake 23 for decelerating control of the safety curtain 10 in its free fall state.

The driving means 20 is installed on one side of the upper structure S1 on which various lighting devices and the like are installed on the stage S and the driving wire 22a is connected to a plurality of And is wound around the wire drum 22 while being coupled to the upper end of the safety curtain 10 through the guide rollers R1.

FIG. 2 is a side view showing the driving means 20 of the present invention. More specifically, referring to FIG. 2, the driving means 20 of the present invention includes:

The drive motor 21,

A wire drum 22 wound around a driving wire coupled to an upper end of the safety curtain 10 and connected to the driving motor 21 so as to be rotated together with the driving motor 21 in operation,

A speed reducer 22B provided for the rotation speed and torque control of the drive motor 21 and a speed reducer 22B provided for the rotation shaft 22A between the drive motor 21 and the wire drum 22,

A drum brake 28 for locking or unlocking the rotation of the rotary shaft 22A,

A centrifugal brake 29 for primarily decelerating the rotation speed of the wire drum 22 when the safety curtain 10 is first dropped free,

The rotation speed of the rotation shaft 22A, that is, the rotation speed of the wire drum 22 is determined according to height intervals after the free fall of the safety curtain 10, And a hydraulic brake 23 that decelerates stepwise.

The drive motor 21 rotates one rotary shaft 22A connected to both the wire drum 22, the speed reducer 22B, the drum brake 28, the centrifugal brake 29 and the hydraulic brake 23, The safety curtain 10 can be raised or lowered arbitrarily for checking the curtain 10 or the like.

The wire drum 22 is wound around the outer periphery of the driving wire 22a connected to the safety curtain 10 and is rotated together with the rotation shaft 22A during operation of the driving motor 21, And is free to rotate without being controlled by the drive motor (21) when an emergency occurs.

The speed reducer 22B is provided between the driving motor 21 and the wire drum 22 to convert a rotation rate, a rotation speed, a torque, and the like of the driving motor 21 so that the power is transmitted to the rotation shaft 22A A gear box 22b made up of various shafts and / or gears, and a control box 22c for gear change control.

The drum brake 28 prevents the rotation shaft 22A of the drive motor 21 from rotating when the operation of the safety curtain 10 is not required, that is, when the safety curtain 10 has been raised or lowered The safety curtain 10 is driven when the safety curtain 10 is free to fall, that is, when the wire drum 22 freely rotates, by receiving the emergency signal in the event of an emergency such as a fire, And releases the locking state of the rotary shaft 22A of the motor 21. [

The drum brake 28 includes a drum 28A connected to the rotary shaft 22A and rotated together with the drum 28A. The drum brake 28A is installed around the drum 28A and is pressed against the outer periphery of the drum 28A, And a plurality of breaking pads 28B for allowing the drum 28A to rotate so as to prevent or prevent rotation of the drum 28A or to separate or separate from the outer periphery of the drum 28A,

Although not shown in the drawing, a handle capable of manually controlling the locking or unlocking of the braking pad 28B manually may be further provided.

The drum brake 28 includes an elastic body (not shown) for bringing the braking pad 28B into close contact with the outer periphery of the drum 28A, an operation arm 26B elastically supported by the elastic body to operate the breaking pad 28B And a magnet (not shown) for controlling or releasing the pressure of the operation arm.

The centrifugal brakes 29 are installed on both sides of the rotary shaft 22A of the wire drum 22 so that when the wire drum 22 rotates freely (more precisely, it is driven by a free fall of the safety curtain 10) (Here, when the wire 22a rotates in one direction while being disengaged), a plurality of brake shoes (not shown) coupled to be opened by centrifugal force contact the brake disc Means that the falling speed is decelerated to a completely low speed like the hydraulic brake 23 in order to prevent the falling speed during the free falling from being continuously increased by the acceleration in order to keep the falling speed at a constant speed (relatively high speed) Not).

These drum brakes 28 and centrifugal brakes 29 are well-known techniques related to braking or deceleration systems of general mechanical devices, and are not related to the essential features of the present invention, and therefore, detailed description thereof will be omitted.

Next, when an emergency situation occurs, the safety curtain 10 controlled by the first deceleration is freely dropped by its own weight through the centrifugal brake 29, and the safety curtain 10 is decelerated stepwise The hydraulic brake 23 will be described.

The hydraulic brake 23 of the present invention decelerates and controls the rotational speed of the rotary shaft 22A connected to the wire drum 22 by using the oil supplied from the oil tank T,

3, there are provided one side oil inflow portion 25a connected to the oil tank T, one side oil inflow portion 25b and another oil inflow portion 25b between the oil inflow portion 25a and the oil outflow portion 25b A housing 25 having an oil retaining space 25c formed therein and an impeller 26 connected to the wire drum 22 and installed to rotate together with the wire drum 22 in the oil retaining space 25c, The motor 24,

And a control unit 27 disposed on the oil discharge unit 25b and controlling the rotational speed of the impeller 26 by controlling the flow rate of the oil discharged to the oil discharge unit 25b in a stepwise manner.

The oil retention space 25c of the housing 25 is hermetically sealed so that the oil in the oil tank T is supplied to the oil inflow portion 25a to fill the oil retention space 25c,

The controller 27 controls the rotational speed of the impeller 26 by adjusting the amount of oil discharged from the oil retention space 25c.

The impeller 26 is connected to the rotary shaft 22A of the wire drum 22 so that the impeller 26 rotates together with the safety curtain 10 when the safety curtain 10 falls freely. The speed of the rotation of the wing 26a of the safety curtain 10 is limited, and as a result, the speed of falling the safety curtain 10 is reduced.

That is, when the flow rate of the oil discharged from the controller 27 is large, the oil pressure inside the housing 25 becomes small, the rotational speed of the impeller 26 becomes relatively fast, and the flow rate of the oil discharged from the controller 27 The oil pressure inside the housing 25 increases and the rotational speed of the impeller 26 is relatively decelerated.

The rotation speed of the wire drum 22 is influenced by the flow rate of the oil discharged to the oil discharge portion 25b through the control portion 27 when the safety curtain 10 freely falls, It is possible to decelerate the safety curtain 10,

In this case, if the oil discharge flow rate controlled by the control unit 27 is stepwise reduced, the falling speed of the safety curtain 10 is also decelerated by the stepwise increase in the hydraulic pressure in the housing 25. [

In the drawings of the present specification, when the safety curtain 10 starts to fall at the initial height H1, the deceleration of the hydraulic brake 23 at the first height H2 and the second height H3, respectively, And the safety curtain 10 is stopped to fall to the third height H4.

The third height H4 is a height at which the lower end of the safety curtain 10 is in contact with the upper surface of the stage S or the ground surface on which the stage S is mounted. Depending on the shape, size, And generally means the height at which the lower end of the safety curtain 10 comes into contact with the stage S and stops,

The second height H3 is the minimum height (interval) at which the safety curtain 10 falls and stops and the last deceleration is performed so as to buffer the impact caused by the falling, Means a spaced height of about 30 cm to 70 cm, more preferably a spaced height of about 50 cm above the third height H4,

The first height H2 is a safety height at which the safety curtain 10 can be safely moved and escaped to the audience by the occurrence of deceleration during the drop of the safety curtain 10, 3, and more preferably a distance of about 2.5 m from the second height H3 (see FIGS. 1, 4 to 6).

Therefore, the safety curtain 10 starts to fall, and the first height H2 falls at a speed controlled by the centrifugal brake 29,

From the first height (H2) to the second height (H3), it falls at the first decelerated speed, securing the time for people to evacuate,

From the second height (H3) to the third height (H4), it drops at a second decelerated speed, thereby ensuring space and time for people to relieve impact caused by falling and finally to evacuate.

The control unit 27 for controlling the flow rate of the oil discharged to the oil discharge unit 25b so that the speed control of the safety curtain 10 may be performed at each step

A valve body 27A connected to the oil discharge portion 25b and having a plurality of oil discharge ports 27a, 27b and 27c,

And a solenoid valve 27B composed of open / close valves 27a ', 27b' and 27c 'installed to open and close the oil outlets 27a, 27b and 27c, respectively.

The solenoid valve 27B controls the opening and closing operations of the on / off valves 27a ', 27b' and 27c 'in accordance with an electric signal. The on / off valves 27a', 27b 'and 27c' The safety curtain 10 starts to fall,

When the first height H2 is reached, one opening / closing valve 27a 'closes the first oil discharge port 27a so as to perform the first deceleration,

When the second height H3 is reached, the two opening and closing valves 27a 'and 27b' close the first and second oil discharge ports 27a and 27b, respectively,

When the third height H4 is reached, the three opening / closing valves 27a ', 27b' and 27c 'close the first, second and third oil discharge ports 27a, 27b and 27c, respectively, .

The driving means 20 of the present invention includes a limit switch L for detecting the rotation speed of the wire drum 22 and measuring the falling height of the safety curtain 10 and transmitting the measured height to the control unit 27 do.

The limit switch L is provided at one end of the rotary shaft 22A of the wire drum 22 and is disposed at a height of the safety curtain 10 (27a ', 27b', 27c ') is sequentially closed on the basis of the measured height of the driving wire (22a) to be released), and transmits the electric signal to the controller (27) Function.

Reference numeral H denotes a manual handle, which enables electrical malfunction or manual rotation of the rotary shaft 22A when it is necessary to manually raise and lower the safety curtain 10.

2, the structure of the driving means 20 is shown to be coupled to the rotary shaft 22A formed in the horizontal direction and arranged in a row in the horizontal direction. However, (See FIG. 7) in which they are arranged in a row or in a multi-row or a folded arrangement in the lateral direction and the longitudinal direction (see FIG. 7), so that the right interpretation of the present invention should not be limited.

Next, the operation and effect of the falling speed control system of the safety curtain 10 having the above-described configuration will be described.

When the driving motor 21 is operated for checking the safety curtain 10 or the like, the rotation of the rotary shaft 22A in the state where the locking of the drum brake 28 is released causes the wire drum 22 The driving wire 22a is unwound or wound on the wire drum 22 while being rotated at a low speed to move the safety curtain 10 upward and downward.

When an emergency situation such as a fire occurs on the stage S due to a carelessness during performances or performances while the safety curtain 10 is stationary on the stage S, the emergency signal of the central control room or various emergency signals The locking of the drum brake 28 is released according to the emergency signal detected by the detection sensor or the manual operation of the user.

When the drum brake 28 is released, the braking pressure for restricting rotation of the rotary shaft 22A is released by the drive motor 21, and as the wire drum 22 rotates, the drive wire 22a is released, Falls freely from the initial height H1 of the curtain 10 to the first height H2,

The deceleration safety curtain 10 is operated by the centrifugal brake 29 to perform the primary deceleration in which the falling speed of the safety curtain 10 is kept constant.

At this time, since the opening and closing valves 27a ', 27b', and 27c 'of the hydraulic brake 23 are all opened and the flow rate of the oil discharged from the housing 25 is maximized, the falling speed of the safety curtain 10 (That is, the rotational speed of the rotary shaft 22A) is influenced only by the centrifugal brake 29. [

When the safety curtain 10 reaches the first height H2 at a constant speed, the limit switch L senses it and transmits an electric signal to the controller 27,

The control unit 27 controls the first opening and closing valve 27a 'of the solenoid valve 27B to close the first oil outlet 27a so that the oil pressure inside the housing 25 is reduced The second deceleration of the safety curtain 10 is performed while the rotational speed of the impeller 26 decreases.

Then, when the safety curtain 10 reaches the second height H3 at the second decelerated speed, the limit switch L that senses the second height H3 again transmits the electric signal to the controller 27,

The control unit 27 controls the second opening and closing valve 27b 'of the solenoid valve 27B to close the second oil outlet 27b so that the pressure of the impeller 26 is increased as the hydraulic pressure in the housing 25 is increased again. The third deceleration of the safety curtain 10 is performed while the rotational speed is reduced again.

As a result, the falling safety curtain 10 is divided into a section from the first height H2 to the second height H3 and a section from the second height H3 to the third height H4 (stop height) Step deceleration is carried out, and falls at a constant speed,

The control section 27 controls the third open / close valve 27c 'of the solenoid valve 27B to close the third oil discharge port 27c due to the electric signal of the limit switch L so that the oil in the housing 25 If the discharge is completely blocked,

The safety curtain 10 stops at the third height H4, that is, the upper surface or the ground of the stage S, while the impeller 26 is not rotated due to the hydraulic pressure inside the housing 25, ) To prevent the fire from spreading to the audience.

The time required for the safety curtain 10 to fall from the initial height H1 to the descent completion height H4 through the stepwise deceleration is quickly made to be about 30 seconds to 1 minute,

In this case, the drop time from the first height (H2) to the second height (H3) is maintained between about 10 seconds and 20 seconds during the entire fall time, and the third height (H4) Falls within a range of 5 seconds to 10 seconds so as to secure time for a performer or persons concerned on the stage S to evacuate out of the stage S,

Particularly, while the safety curtain 10 is falling from the first height H2 to the third height H4, the deceleration is sequentially performed, so that even if the escapee collides with the safety curtain 10, the safety curtain 10 can be safely evacuated out of the performance hall without being injured .

The conventional structure of the drum brake 28 and the centrifugal brake 29 of the drive means 20 and the known art relating to the braking and deceleration and the lifting and lowering guide structure of the safety curtain 10 are omitted However, a person skilled in the art can easily guess, deduce and reproduce this.

While the present invention has been described with reference to the accompanying drawings, it is to be understood that the scope of the present invention is not limited to the details of various modifications, , Changes and substitutions are to be construed as falling within the scope of protection of the present invention.

S: Stage S1: Superstructure
R1: guide roller
10: Safety curtain
20: driving means 21: driving motor
22: wire drum 22A:
22B: Reduction gear 22a: Driving wire
22b: gear box 22c: control box
23: Hydraulic brake 24: Hydraulic motor
25: housing 25a: oil inlet
25b: oil discharge portion 25c: oil staying space
26: impeller 26a: wing
27: control unit 27A: valve body
27B: solenoid valves 27a ', 27b', 27c ': solenoid valves 27a', 27b '
27a, 27b, 27c: Oil discharge port 28: Drum brake
29: Centrifugal brake H: Manual handle
L: Limit switch

Claims (4)

This is for controlling the falling speed of the safety curtain installed on the stage when the emergency curtain falls due to its own weight,
A safety curtain installed on the stage; And
A wire drum on which a driving wire connected to the safety curtain is wound,
And driving means including a hydraulic brake for gradually reducing the rotational speed of the wire drum when the safety curtain falls down. The method according to claim 1,
The hydraulic brake
A housing having an oil inflow portion, a second oil discharge portion, and an oil retention space formed between the oil inflow portion and the oil discharge portion; and a housing connected to the wire drum to rotate together with the wire drum in the oil retention space A hydraulic motor composed of an impeller,
And a control unit installed on the oil discharge unit to control the rotational speed of the impeller by adjusting the flow rate of the oil discharged to the oil discharge unit in a stepwise manner. 3. The method of claim 2,
The control unit
A valve body connected to the oil discharge portion and having a plurality of oil discharge ports,
And a solenoid valve composed of open / close valves installed to open / close the oil discharge ports, respectively. The method of claim 3,
Wherein the driving means includes a limit switch for detecting the number of revolutions of the wire drum and for sequentially closing the opening / closing valves according to the drop height of the safety curtain.
KR1020150065944A 2015-05-12 2015-05-12 Falling speed control system KR101719600B1 (en)

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KR20160133208A true KR20160133208A (en) 2016-11-22
KR101719600B1 KR101719600B1 (en) 2017-03-31

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CN108227588A (en) * 2018-01-26 2018-06-29 浙江圣火智远文化发展有限公司 A kind of curtain opener suspension system
KR102048195B1 (en) * 2018-12-07 2020-01-08 한국산업기술시험원 Emergency Falling system for fire-protection screen

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KR102514836B1 (en) * 2021-09-13 2023-03-29 김은숙 Stage Equipment Elevation System

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JPH07150871A (en) * 1993-11-26 1995-06-13 Tochigi Fuji Ind Co Ltd Drive device for shutter
KR101058484B1 (en) * 2010-11-10 2011-08-24 제이엠스테이지(주) Appratus for fire prevention of stage and method of controlling the same

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JPH07150871A (en) * 1993-11-26 1995-06-13 Tochigi Fuji Ind Co Ltd Drive device for shutter
KR101058484B1 (en) * 2010-11-10 2011-08-24 제이엠스테이지(주) Appratus for fire prevention of stage and method of controlling the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108227588A (en) * 2018-01-26 2018-06-29 浙江圣火智远文化发展有限公司 A kind of curtain opener suspension system
KR102048195B1 (en) * 2018-12-07 2020-01-08 한국산업기술시험원 Emergency Falling system for fire-protection screen

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