Portable emergency escape device

Abstract

The present invention discloses a portable emergency escape device comprising a case, a drum rotatably mounted inside the case and around which a wire is wound, a reduction gear connected to the drum, a DC motor whose rotating shaft is connected to the reduction gear, and a safety belt worn by a user, wherein a braking resistor unit that determines a descent speed is connected between both ends of a power input terminal of the DC motor, the braking resistor unit has an adjustable resistance value, and the portable emergency escape device comprises a constant speed control unit that is connected to the braking resistor unit and changes the resistance value of the braking resistor unit in accordance with the user's weight to maintain a constant descent speed regardless of the user's weight.

Description

[Technical field]

[0001] This application claims priority to Korean Patent Application No. 10-2021-0006359 and Korean Patent Application No. 10-2021-0006360, filed on January 15, 2021, and the entire contents disclosed in the specification and drawings of said application are incorporated herein by reference.

[0002] The present invention relates to a portable emergency escape device, and more particularly to a portable emergency escape device that assists a user in safely escaping by descending to the ground using a wire from a window of a building or the like when an emergency such as a fire occurs in a high-rise building. [Background technology]

[0003] Generally, when an emergency such as a fire occurs in a building such as a high-rise apartment or a high-rise building, an emergency escape is performed by evacuating using a fire escape ladder, or by jumping onto an air mat that has been set up on the ground. However, escape using an escape ladder has the disadvantage that it is limited in space because it requires a large space to install the escape ladder, and it becomes useless in the case of high-rise buildings where the escape ladder cannot reach. In addition, air mattresses are limited in that they require a lot of manpower and a large space to set up, and in high-rise buildings, the anxiety of those escaping can delay the escape time, and there are also problems such as the wind making it difficult to jump accurately onto the air mattress.

[0004] This has led to the proposal of an emergency escape device comprising: a drum rotatably mounted inside a case and with a wire wound around it; a reduction gear connected to the drum for slowing down the rotational speed of the drum during an emergency escape; a hook connected to the end of the wire and secured to a pillar of a high-rise building; and a safety belt connected to the lower end of the case for securing the user's body. The emergency escape device using the wire as described above has the advantage that when a fire occurs, the user can quickly descend through a window to make an emergency escape. However, since the falling speed is reduced using only a reduction gear, the falling speed is not constant, which not only makes the user feel uneasy, but also causes problems such as the user being unable to use the emergency escape device stably.

[0005] As an alternative, Patent Document 1 proposes an emergency escape device for skyscrapers that uses a flow control valve in the speed adjustment section to descend at a constant speed according to the weight of the escapee, and can adjust the descent speed as needed. In the skyscraper emergency escape device of Patent Document 1, a flow control valve for adjusting the flow rate is installed between the first piston cylinder and the second piston cylinder to adjust the speed at which the wire drum rotates through flow rate adjustment. If the amount of movement of the fluid in the first piston cylinder and the second piston cylinder increases, the volume change of the first piston cylinder and the second piston cylinder increases, and the rotation speed of the wire drum increases, increasing the descent speed of the escapee. However, the above-mentioned method of controlling the descending speed using a fluid has the disadvantage that the device is large, heavy, and complicated, making it difficult to use. In addition, if the fluid transfer line or piston cylinder is exposed to high temperatures and the fluid leaks, the device may malfunction or become inoperable. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Korean Patent Publication No. 2018-0119180 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention was devised in consideration of the above-mentioned problems, and aims to provide a portable emergency escape device that uses a braking resistor in a DC motor to brake when descending, and automatically controls the descent speed according to the user's weight, allowing the user to descend safely at a constant speed regardless of their weight.

[0008] Another object of the present invention is to provide a portable emergency escape device having a function that allows the user to start descent stably while adjusting his / her posture immediately before descent.

[0009] It is yet another object of the present invention to provide a portable emergency escape device having a structure that allows a user to freely adjust the descent speed as needed during descent.

[0010] It is yet another object of the present invention to provide a portable emergency escape device having a structure that prevents the user's body from rotating due to the wire during descent.

[0011] It is yet another object of the present invention to provide a portable emergency escape device with an improved structure capable of supporting a heavy load. [Means for solving the problem]

[0012] In order to achieve the above-mentioned object, one aspect of the present invention is a portable emergency escape device comprising a case, a drum rotatably mounted inside the case and around which a wire is wound, a reduction gear connected to the drum, a DC motor whose rotating shaft is connected to the reduction gear, and a safety belt worn by a user, wherein a braking resistor unit that determines the descent speed is connected between both ends of the power input terminal of the DC motor, the braking resistor unit has an adjustable resistance value, and a constant speed control unit is connected to the braking resistor unit and changes the resistance value of the braking resistor unit in accordance with the user's weight to maintain a constant descent speed regardless of the user's weight.

[0013] The constant velocity control section can change the resistance value of the braking resistor section by having at least a portion of its components physically move or deform in response to the weight of the user. Alternatively, the constant velocity control unit may sense mechanical deformation of the drum axis or the guide roll with which the wire contacts differently depending on the user's weight through a spring disposed on one side inside the case, and change the resistance value of the braking resistor. As another alternative, the constant speed control unit may sense at least one of the electrical voltage and current generated between both ends of the power input terminal of the DC motor during descent differently depending on the user's weight, and change the resistance value of the braking resistor unit. As yet another alternative, the constant speed control unit may sense the amount of rotation of any one selected from the DC motor, the drum, the reduction gear, and the guide roll differently depending on the user's weight during descent, and change the resistance value of the braking resistor unit. As yet another alternative, the constant velocity control section may include a range selection dip switch that allows the user to select the range within which his or her weight falls.

[0014] The constant speed control section can perform PWM (Pulse Width Modulation) control on the voltage applied to the braking resistor section. The braking resistor may be configured by connecting a plurality of resistor elements in parallel or in series. The damping resistor may be a variable resistor. The braking resistor may consist of a number of LEDs or a motor. A braking function may be provided by shorting both ends of the power input terminals of the DC motor. A start switch may be attached to the case to start a downward movement by switching from a first state in which both ends of the power input terminal of the DC motor are shorted to a second state in which both ends of the power input terminal of the DC motor are connected to the braking resistor. The start switch may be in the form of an on / off button, a lever, or a string with a safety pin attached.

[0015] The case may be fixed to one side of a building and the safety belt may be connected to the end of the wire that unwinds from the drum. The wire may be covered over some or all of its length with a flame retardant coating or protective tube. At least two of the drums are arranged in series or parallel within the case, and in use, the drums can be lowered while at least two wires are unwound outside the case. The safety belt is in the form of a loop through which the user's arm is passed, and two of them can be attached to the case so that two users can use it at the same time. The wires coming from two or more of the drums may be connected to a single carabiner. Additionally, the wire feeder may further include a roller or ring-shaped guide member fixed to the periphery of each drum for maintaining a constant position at which the wire is unwound. The end of the wire can be attached to a rod-shaped support fixed to the building, or a carabiner can be connected to the wire while it is wound around a pillar of a building. Effect of the Invention

[0016] The portable emergency escape device according to the present invention has the following advantages.

[0017] First, when descending, braking is performed using the braking resistor of the DC motor, and the descent speed is automatically controlled according to the user's weight, allowing the user to descend safely at a constant speed regardless of their weight.

[0018] Secondly, just before descending, the person puts their weight on the wire fixed to the building to stretch it, and then they step on the parapet of the building with their feet to stabilize their posture, and then they can descend while the wire is smoothly unwound by simply pressing a button, etc. Therefore, since no shock load is applied to the wire, damage to the wire and safety accidents can be prevented.

[0019] Third, just before descending, the wire will not be paid out even if it is pulled taut, so the user can begin descending only after fully preparing his / her posture or mental state.

[0020] Fourth, when a fire breaks out in a high-rise building, unlike a conventional slow-descent system in which people wait one by one and take turns escaping even in an emergency situation where every minute counts, multiple users can use their own portable emergency escape devices to escape individually and quickly.

[0021] Fifth, when two or more wires are configured to be unwound simultaneously from the case, it is possible to prevent the user's body from rotating during descent.

[0022] Sixth, since two or more wires can support a heavy load, in the event of an emergency escape, children and parents can descend at the same time using their own safety belts.

[0023] Seventh, when the emergency escape device is used in a wartime drop mission, the user's body does not rotate, so balance can be maintained and heavy military uniforms and combat equipment can be stably supported. [Brief description of the drawings]

[0024] [Figure 1] 1 is a perspective view showing the appearance of a portable emergency escape device according to a preferred embodiment of the present invention; [Diagram 2] FIG. 2 is a perspective view showing the internal configuration with the cover of FIG. 1 removed. [Diagram 3] FIG. 3 is a front view of FIG. 2. [Figure 4] FIG. 2 is a perspective view showing a modified embodiment of the descent start switch of FIG. 1. [Diagram 5] 1 is a perspective view showing the appearance of a portable emergency escape device equipped with a safety handle according to an embodiment of the present invention; [Figure 6] 1 is a perspective view showing an example in which a safety belt is connected to a wire according to an embodiment of the present invention; [Figure 7]FIG. 1 is a perspective view showing an example of installation of a portable emergency escape device. [Figure 8] FIG. 1 is a perspective view showing an example of installation of a portable emergency escape device. [Figure 9] FIG. 1 is a wiring diagram showing a schematic configuration for braking and stopping a DC motor. [Figure 10] 1 is a perspective view showing an example of use of a portable emergency escape device according to a preferred embodiment of the present invention; [Figure 11] FIG. 11 is a perspective view showing the appearance of a portable emergency escape device according to another embodiment of the present invention. [Figure 12] 12 is a perspective view showing the internal configuration with the cover of FIG. 11 removed. FIG. [Figure 13] FIG. 13 is a front view of FIG. 12. [Figure 14] FIG. 14 is a partially enlarged front view showing an example in which a roller-shaped guide member is added to the example shown in FIG. 13. [Figure 15] FIG. 11 is a perspective view showing the appearance of a portable emergency escape device according to still another embodiment of the present invention. [Figure 16] 16 is a perspective view showing the internal configuration of FIG. 15 with the cover removed. FIG. [Figure 17] FIG. 1 is a wiring diagram showing a schematic configuration for braking and stopping a DC motor. [Figure 18] 4 is a circuit diagram showing an example of a configuration in which a constant speed control unit performs PWM control. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] FIG. 1 is a perspective view showing the appearance of a portable emergency escape device according to a preferred embodiment of the present invention, FIG. 2 is a perspective view showing the internal configuration with the cover of FIG. 1 removed, and FIG. 3 is a front view of FIG.

[0026] 1 to 3, a portable emergency escape device according to a preferred embodiment of the present invention includes a case 100 having a predetermined shape, a drum 101 rotatably attached inside the case 100 and around which a wire 103 is wound, a reduction gear 109 connected to the drum 101 and reducing the rotational speed of the drum 101 during an emergency escape, a DC motor 102 having a rotating shaft connected to the reduction gear 109, a braking resistor 106 connected to the DC motor 102, a constant speed control unit (see 115 in FIG. 9) that maintains a constant descent speed regardless of body weight, a safety belt 104 connected to the lower end of the case 100 to secure the upper body of a user, and a hook 105 connected to an end of the wire 103 and hooked to a predetermined support structure fixed to a high-rise building.

[0027] The drum 101 is provided in the case 100 and rotates passively by the force of the wire 103 being pulled as the escapee descends. It is preferable that both ends of the rotation shaft of the drum 101 are supported within the case 100 to prevent the weight of the user from being biased toward one side of the reduction gear 109.

[0028] The wire 103 may be made of various materials, including a typical rope-type wire. In addition, the wire 103 may be partially or entirely covered with a fireproof coating or protective tube over its entire length to ensure flame resistance in the event of a fire. At least a portion of the wire 103 may be provided with a light-emitting member (not shown), such as an LED or EL wire, to ensure visibility for identifying the descent during a fire, on a cloudy day, or at night.

[0029] The reduction gear 109 reduces the descending speed of the escapee at a predetermined gear ratio and transmits the reduced speed to the rotating shaft. The reduction gear 109 may be constituted by various known gear assemblies. The DC motor 102 generates a braking force when the rotating shaft rotates due to an external force. The DC motor 102 is not actively rotated by an external power source, but the rotating shaft rotates passively together with the drum 101 due to the force of pulling the wire 103, which is generated by the descent (free fall motion) of the escapee.

[0030] The braking resistor 106 is connected between both ends of the power input terminal of the DC motor 102 to determine the descent speed. If the braking resistor 106 is controlled to have a resistance value according to the weight of the person escaping during an emergency escape, the descent speed can be maintained constant regardless of the weight. In addition, a brake function can be provided by directly contacting both ends of the power input terminal of the DC motor 102 to short them. Here, both ends of the power input terminal are electrically connected to a separate short switch (see 107 in FIG. 17) and when the short switch 107 is turned on, the DC motor 102 is shorted to perform a brake function. The short switch 107 is installed exposed to the outside of the case 100.

[0031] The braking force generated by the power generation of the DC motor 102 varies according to the resistance value of the braking resistor 106. That is, when the resistance value of the braking resistor 106 connected to the DC motor 102 is relatively large, the energy consumed by Joule heat in the braking resistor 106 is large and the braking force of the DC motor 102 is weak, resulting in a fast descent speed. On the other hand, when the resistance value of the braking resistor 106 is relatively small, the energy consumed by Joule heat is small and the braking force of the DC motor 102 is large, resulting in a slow descent speed. When the resistance value is 0, a short circuit occurs, so the braking force is large and descent is essentially stopped.

[0032] For example, when the resistance value of the braking resistor 106 is relatively small, such as about 100Ω, the braking force generated by the DC motor 102 is large, so that the drum 101 connected to the rotating shaft of the DC motor 102 rotates slowly, the speed at which the wire 103 is unwound slows, and the descent is gentle. On the other hand, when the resistance value of the braking resistor 106 is adjusted to gradually increase to 200Ω, 300Ω, 400Ω, etc., the braking force generated by the DC motor 102 gradually weakens, and the descent is gradually faster. As described above, the resistance value of the braking resistor 106 determines the descent speed, and is therefore controlled to a resistance value according to the weight of the user so as to give the user (escapee) a sense of safety.

[0033] Start switches 112, 113 for selectively activating a brake (short circuit state) are connected to both ends of the power input terminal of DC motor 102 as shown in FIG. 9. Also, connected between both ends of the power input terminal so as to be connected in parallel to start switches 112, 113 are a braking resistor unit 106 having a plurality of resistor elements having different resistance values ​​connected in parallel or series to adjust the descent speed, and a constant speed control unit 115 for changing the resistance value of braking resistor unit 106 to maintain a constant descent speed.

[0034] Alternatively, the braking resistor 106 may be a conventional rotary or sliding variable resistor. In this case, the lever of the variable resistor may be moved to increase or decrease the descent speed. At this time, a spring may be coupled to the lever of the variable resistor to provide an elastic restoring force. The ability to adjust the variable resistor to increase or decrease the descent speed as needed may be useful in military training or wartime drop operations.

[0035] As another alternative, the braking resistor unit 106 may be composed of a plurality of LEDs or a motor. Alternatively, the braking resistor unit 106 may be composed of various electric / electronic components (or devices) whose overall resistance value can be adjusted.

[0036] The constant speed control unit 115 changes the resistance value of the braking resistor 106 by physically moving or deforming at least some of the components according to the weight of the user. Preferably, the constant speed control unit 115 senses the mechanical deformation of a certain guide roll (not shown) with which the shaft of the drum 101 or the wire 103 contacts differently according to the weight of the user through a spring or a leaf spring (not shown) arranged on one side inside the case 100, and changes the resistance value of the braking resistor 106. Specifically, when the weight of the user is, for example, 100 kg, and the shaft of the drum 101 or the shaft of the guide roll is mechanically deformed by a first displacement according to the weight, the constant speed control unit 115 physically moves or deforms the spring by a first length in conjunction with the deformation, and automatically sets the resistance value of the braking resistor 106 to, for example, 100Ω. As a result, a relatively large braking force is generated in the DC motor 102, and the wire 103 is slowly unwound, causing the user to descend. Meanwhile, when the user's weight is, for example, 50 kg, the constant speed control unit 115 mechanically deforms the shaft of the drum 101 and the shaft of the guide roll by a second displacement according to the weight, and in conjunction with this, the spring physically moves or deforms by a second length, and automatically sets the resistance value of the braking resistor unit 106 to, for example, 400Ω. As a result, a relatively small braking force is generated in the DC motor 102, and the wire 103 is unwound relatively faster than in the case of 100 kg, and the user descends. In this way, the constant speed control unit 115 controls to generate different braking forces according to the user's weight, so that anyone can descend at a constant speed regardless of the user's weight. Without such a speed control function of the constant speed control unit 115, a significantly larger rotational force (torque) is applied to the rotating shaft of the DC motor 102 when the user weighs 100 kg compared to when the user weighs 50 kg, resulting in a significantly faster descent.

[0037] Alternatively, the constant speed control unit 115 may sense at least one of the voltage and current of electricity generated between both ends of the power input terminal of the DC motor 102 during descent differently depending on the weight of the user, and change the resistance value of the braking resistor unit 106. To this end, the constant speed control unit 115 may include a normal current detection sensor or voltage detection sensor. For example, an adult user is heavier than a child and generates relatively high power electricity between both ends of the power input terminal of the DC motor 102, so the constant speed control unit 115 senses at least one of the voltage and current of the electricity generated differently depending on the weight of the user, and changes the resistance value of the braking resistor unit 106. The process of changing the resistance value of the braking resistor unit 106 to maintain a constant descent speed regardless of the weight of the user is the same as the above-mentioned method.

[0038] As another alternative, the constant speed control unit 115 may sense the amount of rotation of any one selected from the DC motor, drum, reduction gear, and guide roll differently depending on the weight of the user during descent, and change the resistance value of the braking resistor unit. The process of changing the resistance value of the braking resistor unit 106 to maintain a constant descent speed regardless of the weight of the user is the same as the method described above.

[0039] As yet another alternative, the constant speed control unit 115 may include a range selection DIP switch that allows the user to select the range in which his / her weight falls. In this case, the range selection DIP switch may be divided into "adult" and "child", for example, or may be divided into predetermined weight ranges such as "10-30kg", "31-60kg", "61-90kg", and "91-120kg". The process of changing the resistance value of the braking resistor unit 106 to maintain a constant descent speed regardless of the user's weight is the same as the method described above.

[0040] More preferably, the constant speed control unit 115 may perform PWM (Pulse Width Modulation) control using a predetermined switching element (see 115d in FIG. 18) connected to the braking resistor unit 106 to maintain a constant descent speed regardless of the user's weight. When performing PWM control, a duty ratio of a pulse width to a voltage applied to the braking resistor unit 106 may be changed according to the user's weight, thereby achieving substantially the same effect as changing the resistance value of the braking resistor unit 106. The pulse control is not limited to the PWM method, and may be performed using various known pulse modulation methods or electrical signal control methods. The configuration of the constant speed control unit 115 will be described in detail below, focusing on an example of performing pulse control using the PWM method.

[0041] Specifically, as shown in FIG. 18, the constant speed control unit 115 includes a SMPS (Switching Mode Power Supply) regulator 115a, a voltage detection unit 115b, a PWM control microcomputer 115c, a switching element 115d, a shunt resistor 115e, and a B-contact relay 115f.

[0042] The SMPS regulator 115a performs switching control of the electromotive force generated by the DC motor 102 to output a constant voltage for driving the PWM control microcomputer 115c and the B-contact relay 115f.

[0043] The voltage detection unit 115b detects the voltage of the electromotive force generated in the DC motor 102 and transmits it to the PWM control microcomputer 115c.

[0044] The PWM control microcomputer 115c detects the weight of the user from the voltage value detected by the voltage detection unit 115b, and performs PWM control based on the detected weight to change the resistance value of the braking resistor unit 106 substantially connected to both ends of the DC motor 102. At this time, the PWM control microcomputer 115c drives a switching element 115d such as a FET (Field Effect Transistor) connected to the braking resistor unit 106 to control the duty ratio of the pulse width. Here, the FET can be replaced with various known semiconductor switching elements.

[0045] The B-contact relay 115f is a safety device that prevents a fall accident caused by a failure to brake by connecting the braking resistor 106 to both ends of the DC motor 102 even when a failure occurs in at least one of the SMPS regulator 115a, the PWM control microcomputer 115c, and the switching element 115d. is . That is, the B-contact relay 115f has a switch structure (normally closed) that is normally on (when no control signal is input) and turned off when a control signal is input. Therefore, even if at least one of the SMPS regulator 115a, the PWM control microcomputer 115c, and the FET fails, the B-contact relay 115f is switched to the on state to connect the braking resistor 106 to both ends of the DC motor 102.

[0046] During normal operation of PWM control, the PWM control microcomputer 115c inputs a control signal to the B-contact relay 115f, and sets the contact of the B-contact relay 115f to an OFF state in which the contact is separated. The PWM control microcomputer 115c is also connected between the source terminal of the FET, which is the switching element 115d, and the shunt resistor 115e (see 116 in FIG. 18), and measures the current flowing through the switching element 115d. The PWM control microcomputer 115c measures the current value to detect whether the switching element 115d is faulty or not, and switches the B-contact relay 115f to an ON state in which the contact is connected, and connects the braking resistor unit 106 to both ends of the DC motor 102, since normal PWM control is not possible when no current flows or the switching element 115d is in a short-circuit state. Therefore, the B-contact relay 115f is connected in parallel to the switching element 115d and the shunt resistor 115e, and is connected in series to the braking resistor unit 106.

[0047] The start switches 112, 113 are switched from a first state in which both ends of the power input terminal of the DC motor 102 are shorted to a second state in which both ends of the power input terminal of the DC motor 102 are connected to the braking resistor 106, thereby starting the downward movement. If necessary, the user can operate the start switches 112, 113 during the downward movement to stop the downward movement at a desired point.

[0048] The start switches 112, 113 are configured in the form of a button with a cable of a predetermined length extended to the inside of the case 100. Alternatively, the start switches 112, 113 may be configured in the form of a string with a predetermined safety pin (not shown) inserted into the case 100 as shown in Fig. 4 connected to one end. In this case, the safety pin may be configured to cooperate with the short-circuit switch 107. As another alternative, the start switches 112, 113 may be configured in the form of a lever, a dial, or an on / off button attached to the outer surface of the case 100 without an extension cable.

[0049] The safety belt 104 is configured in a loop shape through which the user's arms are passed. It is preferable that the safety belt 104 be worn around both sides of the user's arms.

[0050] The safety belts 104 may be fastened to each other on both sides in front of the chest with the user's arms passing through the safety belts 104, or may be fastened and detached.

[0051] A loop-shaped safety handle may be attached to one side of the safety belt 104 so that the user can hold it by hand and hang on it as shown in Fig. 5. Also, when the case 100 is fixed to one side of a building in use, the safety belt 104 may be connected to the end (lower end) of the wire 103 that is unwound from the drum 101 as shown in Fig. 6.

[0052] During an emergency escape, the carabiner-shaped hook 105 connected to the end of the wire 103 is hooked to the pillar and fixed, and the safety belt 104 is passed around the user's upper body, i.e., armpit, and tied. Specifically, as shown in Fig. 7, the carabiner-shaped hook 105 is hooked to a rod-shaped support 1 installed on a balcony or terrace of a building, or as shown in Fig. 8, the wire 103 is wound around a building pillar or the rod-shaped support 1 and then hooked to the wire 103 for tying.

[0053] When an emergency situation such as a fire in a high-rise building occurs, the user (escapee) hooks the carabiner-shaped hook 105 to a building pillar or a rod-shaped support 1 installed on a balcony or terrace, as shown in FIG. 10, puts his / her weight on the hook to stretch the wire fixed to the building, and then steps on the building's parapet with his / her feet to prepare for descent.

[0054] Thereafter, preferably by pressing start switches 112, 113 or pulling a cord, the state is switched from a first state in which both ends of the power input terminal of DC motor 102 are shorted to a second state in which both ends of the power input terminal of DC motor 102 are connected to braking resistor 106. This weakens the braking force generated by DC motor 102, allowing the wire to be smoothly unwound and lowered. Therefore, no impact load is applied to the wire, preventing safety accidents such as the wire breaking.

[0055] The descent speed is kept constant regardless of the weight of the user by the constant speed control unit 115. The constant speed control unit 115 changes the resistance value of the braking resistor unit 106 by either physically moving or deforming at least some parts according to the weight of the user, by sensing the amount of power generated between both ends of the power input terminal of the DC motor 102 during descent differently depending on the weight, by following the weight range set by the user on the range selection DIP switch, or by performing PWM control. For example, when used by a relatively heavy adult, the resistance value of the braking resistor unit 106 is lowered to an appropriate value to reduce the descent speed, and when used by a relatively light child, the resistance value of the braking resistor unit 106 is increased to an appropriate value to increase the descent speed, thereby always maintaining a constant descent speed regardless of the weight.

[0056] When the user approaches the ground and wishes to stop at a desired position, start switches 112, 113 are operated to short both ends of the power input terminals of DC motor 102, and the strong braking force generated by DC motor 102 suppresses the rotation of drum 101, preventing wire 103 from being unwound, and descent is halted.

[0057] FIG. 11 is a perspective view showing the appearance of a portable emergency escape device according to another embodiment of the present invention, FIG. 12 is a perspective view showing the internal configuration with the cover of FIG. 11 removed, and FIG. 13 is a front view of FIG.

[0058] 11 to 13, a portable emergency escape device according to a preferred embodiment of the present invention includes a case 100 of a predetermined shape, at least two drums 101 rotatably attached inside the case 100 and around which a wire 103 is wound, reduction gears 109 connected to each drum 101 to reduce the rotational speed of the drums 101 during an emergency escape, DC motors 102 having rotating shafts connected to each reduction gear 109, a braking resistor 106 connected to the DC motor 102, hooks 105 connected to the ends of each wire 103 and fastened to a predetermined support structure fixed to a high-rise building, and a safety belt 104 connected to the lower end of the case 100 to secure the upper body of a user.

[0059] At least two drums 101 are arranged in series or parallel within the case 100. The following describes the configuration of the invention, focusing on an embodiment in which two drums 101 are arranged in series within the case 100. As the user descends, the drums 101 passively rotate due to the pulling force of the wire 103. Both ends of the rotation shaft of each drum 101 are preferably supported within the case 100 to prevent the user's weight from being biased toward one side of the reduction gear 109.

[0060] The wire 103 may be made of various materials, including a typical rope-type wire. In addition, the wire 103 is covered with a fireproof coating or a protective tube over a portion or the entire length thereof to ensure flame resistance in the event of a fire. Also, the wire 103 may be provided with a light-emitting member (not shown), such as an LED or EL wire, at least in part, to ensure visibility for identifying the descent during a fire, on a cloudy day, or at night.

[0061] As shown in Fig. 14, it is preferable that a guide member 110 consisting of a pair of rollers is fixed to the case 100 via a predetermined bracket 111 around each drum 101 to keep the position where the wire 103 is paid out constant. Alternatively, the guide member 110 can be replaced with a single roller or a ring-shaped guide member 110 through which the wire 103 passes. With this configuration, even if the positions of the wire 103 paid out from each of the two drums 101 are different, the wire 103 is always paid out from a predetermined point (preferably the middle point) based on the length direction of the drum 101, so that it is possible to prevent the phenomenon of losing balance when the escapee hangs.

[0062] As shown in Figures 15 and 16, the wires 103 reeled out from the two drums 101 may be connected to one carabiner.

[0063] The reduction gear 109 reduces the descending speed of the escapee at a predetermined gear ratio and transmits the reduced speed to the rotating shaft. The reduction gear 109 may be constituted by various known gear assemblies.

[0064] The DC motor 102 generates a braking force when the rotating shaft rotates due to an external force. The DC motor 102 is not actively rotated by an external power source, but the rotating shaft rotates passively together with the drum 101 due to the force of pulling the wire 103, which is generated by the descent (free fall motion) of the escapee.

[0065] At least one braking resistor 106 is connected between both ends of the power input terminal of the DC motor 102 to determine the descent speed. Therefore, during an emergency escape, the braking resistor allows the user to descend at a constant descent speed regardless of the user's weight. Also, a brake function can be provided by directly contacting both ends of the power input terminal of the DC motor 102 to short them out. Here, both ends of the power input terminal are electrically connected to a separate short-circuit switch (107) and when the short-circuit switch (107) is turned on, the DC motor 102 is short-circuited to perform the brake function. The short-circuit switch (107) is installed exposed to the outside of the case 100.

[0066] The braking force generated by the power generation of the DC motor 102 varies depending on the resistance value of the braking resistor 106. That is, when the resistance value of the braking resistor 106 connected to the DC motor 102 is relatively large, the energy consumed by Joule heat in the braking resistor 106 is large and the braking force of the DC motor 102 is weak, resulting in a fast descent speed. On the other hand, when the resistance value of the braking resistor 106 is relatively small, the energy consumed by Joule heat is small and the braking force of the DC motor 102 is large, resulting in a slow descent speed. When the resistance value is 0, a short circuit occurs, so the braking force is large and descent is essentially stopped.

[0067] For example, when the resistance value of the braking resistor 106 is relatively small, such as about 100Ω, the braking force generated by the DC motor 102 is large, so that the drum 101 connected to the rotating shaft of the DC motor 102 rotates slowly, the speed at which the wire 103 is unwound slows, and the descent is gentle. On the other hand, when the resistance value of the braking resistor 106 is adjusted to gradually increase to 200Ω, 300Ω, 400Ω, etc., the braking force generated by the DC motor 102 gradually weakens and the descent is gradually faster. As described above, the resistance value of the braking resistor 106 determines the descent speed, so it is desirable to set it to an appropriate resistance value so as to give the escapee a sense of safety.

[0068] As shown in Fig. 17, a short circuit switch (107) for selectively activating a brake (short circuit state) is connected to both ends of a power input terminal of the DC motor 102, and a speed adjustment unit 108 for adjusting a descent speed by selecting a specific resistor from among a plurality of resistors included in the braking resistor unit 106 may be connected between both ends of the power input terminal so as to be connected in parallel to the short circuit switch (107). The speed adjustment unit 108 may be configured in various forms such as a push button, a dial, or a rotary lever. Although not shown in Fig. 17, a constant speed control unit 115 for maintaining a constant descent speed regardless of the weight of the user is connected to the braking resistor unit 106 in addition to the speed adjustment unit 108, as in the above-mentioned embodiment.

[0069] The safety belt 104 is a loop around which the user's arms are passed, and preferably, two safety belts are attached to the case so that two users can use it at the same time. The safety belt 104 is worn on both sides of the user in an X-shape or vertical shape.

[0070] Two safety belts 104 may be attached to the case 100, and the two may be configured to have the same shape and size so that they can be used together. In addition, the safety belts 104 on both sides may be connected to each other through a predetermined fastener in front of the user's chest with both arms passed through the safety belts 104, or may be attached and detached.

[0071] When the case 100 is fixed to one side of a building in use, a safety belt 104 may be connected to the end of the wire 103 that is unwound from the drum 101. Also, a loop-shaped safety handle may be attached to one side of the safety belt 104 so that the user can grab it with their hand and hang from it in use.

[0072] During an emergency escape, carabiner-shaped hooks 105 connected to the ends of the two wires 103 are hooked and fixed to the pillar, and the safety belt 104 is passed around the upper body of the user (escapee), i.e., around the armpit, and tied. Specifically, each carabiner-shaped hook is hooked to a rod-shaped support installed on the terrace of a building, or the wire 103 is wound around a building pillar or the rod-shaped support and then hooked to the wire 103 and tied. When two safety belts 104 are attached to the case 100, a child and an adult can descend at the same time.

[0073] As described above, when the user is ready to leave the building and attempt to escape, the two drums 101 rotate slowly while the two wires 103 are unwound by a braking force inversely proportional to the braking resistance value of the DC motor 102, allowing the escapee to descend safely at a predetermined descent speed.

[0074] When the user approaches the ground and wishes to stop at a desired position, he or she operates start switches 112, 113 to short both ends of the power input terminals of DC motors 102. This causes a strong braking force to be generated in each DC motor 102, which suppresses the rotation of drum 101, prevents wire 103 from being unwound, and stops the descent.

[0075] As described above, the present invention has been described using limited embodiments and drawings. However, the present invention is not limited thereto, and it goes without saying that various modifications and variations can be made by a person having ordinary knowledge in the technical field to which the present invention belongs within the technical spirit of the present invention and the equivalent scope of the claims. [Industrial Applicability]

[0076] In the case of applying the present invention, when a fire breaks out in a high-rise building, multiple users can individually and quickly escape using their own portable emergency escape devices. When descending, braking is performed using the braking resistor of the DC motor, and the descending speed is automatically controlled according to the user's weight, allowing the user to descend safely at a constant speed regardless of weight.

Claims

1. A portable emergency escape device comprising: a case; a drum rotatably attached inside the case and around which a wire is wound; a reduction gear connected to the drum; a DC motor having a rotating shaft connected to the reduction gear; and a safety belt worn by a user, A braking resistor that determines a descending speed is connected between both ends of the power input terminal of the DC motor, a constant speed control unit connected to the braking resistor unit and configured to change a resistance value of the braking resistor unit in response to a user's weight to maintain a constant descent speed regardless of the user's weight; The constant speed control unit detects a rotation amount of any one selected from the DC motor, the drum, the reduction gear, and the guide roll during descent, The rotation amount varies depending on the weight of the user, and the resistance value of the braking resistor varies depending on the rotation amount, thereby maintaining the descent speed constant for all users regardless of the weight of the user, The constant speed control unit includes an SMPS regulator, a PWM control microcomputer, and a switching element. A safety device is connected to both ends of the DC motor, and when a failure occurs in at least one of the SMPS regulator, the PWM control microcomputer, and the switching element, the braking resistor unit is connected to both ends of the DC motor to prevent a fall accident caused by the inability to brake the constant speed control unit. Portable emergency escape device.

2. The switching element is connected to the braking resistor.

2. The portable emergency escape device according to claim 1, wherein the constant speed control section performs pulse control using the switching element to vary a resistance value between both ends of a power input terminal of the DC motor.

3. The portable emergency escape device according to claim 1, wherein the braking resistor portion is composed of a variable resistor and is configured to increase or decrease the descent speed.

4. 2. The portable emergency escape device according to claim 1, wherein a brake function is provided by shorting both ends of the power input terminals of the DC motor.

5. 2. The portable emergency escape device of claim 1, wherein the wire is covered in a flame-retardant coating or protective tube over a portion or all of its length.

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