TWI573608B - A fire escape slowdown device - Google Patents

Description

Fire escape descending device

The present invention relates to a descending device, and more particularly to a fire escape descent device suitable for installation on a building.

With the rapid development of the economy, there are many different changes in people's food, clothing, housing, travel, entertainment, etc. In terms of living, the construction of the early cottages or the second and third floors is not enough. Used instead, it is a high-rise building with dozens of floors. In order to cope with accidents such as fires and earthquakes, building regulations stipulate that high-rise buildings must have equipment for descending machines or escape ladders to provide escape in times of crisis. use.

In addition to escape ladders in high-rise buildings, the most commonly used is the rope-type vertical landing equipment. Using the escape brackets provided in the building, the brackets are extended out of the building body during use, and then the ropes are hung on the escape brackets. A drooping escape is carried out to prevent accidental casualties.

However, the existing vertical landing escape equipment is not easy to operate and shakes when climbing, and people are afraid to try, and when the rope is used for hanging down, the descending gravity acceleration may cause the locking bolt of the escape bracket to break. Pulling the escape bracket uprooted causes the person to fall, which in turn increases the damage of the accident, so there are concerns about safety and need to be improved.

Referring to Figure 1, the new type M486687 of the Republic of China, "Escape ladder structure improvement", is applicable to an escape ladder 1 installed at the security window 100, which comprises at least a first ladder body 11 and at least one second ladder body The first ladder body 11 is provided with two side frames 111, and the second ladder body 12 is provided with two side frames 121, wherein the two side frames 111 of the first ladder body 11 are provided with a first side frame 111. a damping device 112, and two side frames of the second ladder body 12 A second damper device 122 is disposed at each end of the 121, and the second damper device 122 is coupled with the first damper device 112 of the first ladder body 11 in combination with at least one rope (not shown).

When the escape ladder 1 is slid down, the first damper device 112 and the second damper device 122 are matched to each other, so that the escape ladder 1 is slid at an appropriate speed to achieve the purpose of buffering effect.

From the above description, it can be seen that the conventional escape ladder structure improvement has the following disadvantages in actual use:

First, can not reduce the fear of use

Although the conventional escape ladder 1 provides the function of escape from the height to the ground, it must be grasped by the human body to grasp the first and second ladder bodies 11, 12 to descend down the building. However, in times of crisis, people often tremble with fear and fear. At this moment, they must be grasped by hand. It is easy to loosen their hands or step on the air because of carelessness. As a result, the regrets of the fall of the building occur, which increases the risk of escape. .

Second, derivative security concerns

When the escape ladder 1 is not in use, the first and second ladder bodies 11 and 12 are stacked and folded to be installed on the security window 100 of the building. However, the first and second ladder bodies 11 and 12 may be caused by After being fixed outdoors for a long time, and after being exposed to the wind and the sun, it is easy to cause rust on the surfaces of the first and second step bodies 11, 12, which leads to safety concerns in use.

Third, destroy the aesthetics of the building

Since the first and second ladder bodies 11 and 12 have a certain length and volume, not only will occupy a large space, but also the aesthetic appearance of the building, and the escape ladder 1 is installed in the building. On the anti-theft window 100 on the outer surface of the object, not only the construction is dangerous, but also the process is cumbersome, and the required application time and cost are high, which is not conducive to the promotion of the market.

All of the above shortcomings have revealed various problems arising from the use of conventional escape ladder structure improvements, such as improving the deficiencies of existing escape facilities, and developing an escape facility that combines aesthetics and safety, low cost, and reduced user fear. It is an urgent goal to be achieved.

In view of the above, it is an object of the present invention to provide a fire escape descent device suitable for installation on a building and including a base unit and an escape unit.

The base unit includes a movable platform disposed on a wall of the building, the movable platform has a fixing base surrounding an accommodating space, and an escape hole disposed on the fixing seat and extending through the fixing seat. The escape unit includes an escape carrier disposed in the escape perforation, a descending rope set disposed in the accommodation space and coupled to the escape carrier, and a set on the fixed seat and movable with the escape The carrier is clamped to each other.

The escape vehicle is movable relative to the movable platform between a non-escape position and an escape position. When the non-escape position is located, the escape vehicle is interlocked with the limit member and is limited to the escape of the movable platform. In the perforation, when located in the escape position, the escape carrier does not latch with the limiting member and can be gradually lowered from the escape perforation by separating the descending rope group from the movable platform.

Another technical means of the present invention is that the base unit further includes a fixing frame disposed on the wall surface of the building, a connecting port formed on the fixing frame, and two supporting bars, wherein the movable platform is corresponding The connecting port is disposed on the connecting port, and further has a flip end pivotally connected to the bottom end of the fixing frame, and an opposite connecting end, the escape hole is located between the flip end and the connecting end, and the two support bars are connected And the fixing frame at the connecting end, so that the connecting end of the movable platform can be separated from the top end of the fixing frame and pivoted by an angle.

A further technical means of the present invention is the above fire escape descent device, further comprising a control unit comprising a controller disposed on the building, and a set on the fixed frame and the movable platform a control switch that is in contact with the connection and electrically connected to the controller, the controller can control the opening and closing of the control switch, so that the connection end of the movable platform is not interfered by the control switch, and is fixed from the fixed end The top of the frame separates and is perpendicular to the building.

A further technical means of the present invention is that the escape carrier has a telescopic tube body and a bottom cover that closes the bottom of the telescopic tube body. When the telescopic tube body is moved away from the bottom cover, the The telescopic tube body and the bottom cover define an escape space, and the telescopic tube body can be folded on the bottom cover when retracting and moving toward the bottom cover.

Another technical means of the present invention is that the descending rope set has a plurality of pulleys disposed in the accommodating space, a plurality of speed reducers connected to the pulleys, and a plurality of pulleys disposed on each pulley and A descending rope connected to the top of the telescopic tube of the escape vehicle.

Another technical means of the present invention is that the movable platform further has a limiting slot formed on the periphery of the escape perforation, and the limiting member has a clip on the escape carrier and is generally inverted U-shaped. An insertion section, and a control rod vertically disposed with the insertion section and extending into the limiting slot, the insertion section clamping the escape carrier when the control lever slides in the direction of the escape perforation Holder is fixed in the escape perforation, and when the lever slides away from the escape perforation direction, the insertion section is separated from the escape carrier to disengage the escape carrier from the escape perforation.

A further technical means of the present invention is that each of the descending ropes has a descending section connected to the escape carrier, a winding section wound on the pulley, and a distance away from the descending section. a stretching section, the stretching section is exposed outside the accommodating space, and when the escape carrier is gradually lowered from the escape perforation, the stretching section of the hoisting rope can be lowered The rope-connected escape carrier is reset to the escape perforation of the movable platform.

Another technical means of the present invention is that the control unit further includes a sensor disposed in the building and electrically connected to the controller, wherein the sensor can detect external environmental variables and emit a sensing signal. Give the controller to control the control switch to act.

Another technical means of the present invention is that the control unit further includes a loudspeaker disposed in the building and electrically connected to the controller. When the controller receives the sensing signal from the sensor, The controller controls the loudspeaker to emit a warning sound.

A further technical means of the present invention is that the support rod has a first connecting rod connected to the top end of the fixed frame, a second connecting rod connected to the connecting end of the movable platform, and a pivoting connection One or two connecting rods between the connecting rods, and two sides of the fixing seat are respectively provided with a pair of receiving grooves which are arranged by the first and second connecting rods, and when the connecting end of the movable platform is not interfered by the control switch, Separating from the top of the fixed frame and perpendicular to the building, the first and second connecting rods are in a straight line. When the connecting end of the movable platform is interfered by the control switch and fixed in the fixed frame, the first The two connecting rods are folded in the receiving groove by the pivoting member.

The beneficial effect of the invention is that the enclosed escape space is defined by the telescopic tube body and the bottom cover, which can alleviate the fear caused by the escaper to descend from the height of the escape vehicle, and the escape space can be further improved. At the same time, multiple escapers are equipped to increase the confidence and security of escape. Moreover, the sensor is used to detect external environmental variables in the building, and the sensing signal is sent to the controller to control the control switch. Actuating, the active platform is automatically switched to the escape position to shorten the time for the personnel to operate the descending device, and the loudspeaker that can issue a warning sound can prompt the person in the building to escape as quickly as possible, so as to avoid missing the escape. The timing of gold and the reduction of casualties, thereby increasing the chance of escape.

3‧‧‧Buildings

5‧‧‧Base unit

51‧‧‧Event Platform

510‧‧‧ accommodating space

511‧‧‧ fixed seat

512‧‧‧ escape piercing

513‧‧‧Flipping end

514‧‧‧Connected end

515‧‧‧ accommodating slots

516‧‧‧Limited slot

52‧‧‧Fixed frame

53‧‧‧Connecting port

54‧‧‧Support rod

541‧‧‧First connecting rod

542‧‧‧Second connecting rod

543‧‧‧ pivoting parts

6‧‧‧Escape unit

61‧‧‧Escape vehicle

610‧‧‧Escape space

611‧‧‧Retractable pipe body

612‧‧‧ bottom cover

62‧‧‧Lifting rope set

621‧‧‧ pulley

622‧‧‧Reducer

623‧‧‧Lifting rope

624‧‧‧Declining section

625‧‧‧Winding section

626‧‧‧Stretching section

63‧‧‧Limited parts

631‧‧‧Insert paragraph

632‧‧‧Control lever

7‧‧‧Control unit

71‧‧‧ Controller

72‧‧‧Control switch

73‧‧‧ sensor

74‧‧‧ loudspeakers

A‧‧‧non-escape location

B‧‧‧Escape location

1 is a perspective view showing a modification of an escape ladder structure of the conventional Taiwan No. M486687; FIG. 2 is a perspective view showing a preferred embodiment of the fire escape descending device of the present invention; FIG. 3 is a perspective view illustrating The preferred embodiment is in a non-escape position; FIG. 4 is a side cross-sectional view showing a state in which a limit member is placed on an escape carrier in the preferred embodiment; FIG. FIG. 6 is a block diagram showing the electrical connection of a control unit in the preferred embodiment; FIG. 7 is a schematic view showing an activity in the preferred embodiment. FIG. 8 is a front view showing a state in which the escaper is located in an escape space; and FIG. 9 is a front view showing a building The upper and lower floor walls are respectively provided with the embodiment of the preferred embodiment.

The detailed description of the preferred embodiments of the present invention will be apparent from the detailed description of the preferred embodiments.

2 and 3, the fire escape descending device of the present invention is suitable for being installed on a building 3 for people to ride and escape, and includes a base unit 5, an escape unit 6, and A control unit 7.

The base unit 5 includes a movable platform 51 disposed on the wall surface of the building 3, a fixed frame 52 disposed on the wall surface of the building 3, a connecting port 53 formed on the fixed frame 52, and two supports The rod 54 is disposed on the connecting port 53 correspondingly.

Further, the activity platform 51 has a surrounding definition a fixing seat 511 for accommodating the accommodating space 510, an escape hole 512 disposed on the fixing base 511 and extending through the fixing base 511, an inverted end 513 pivotally connected to the bottom end of the fixing frame 52, and a turning end The opposite end 514, the receiving groove 515 disposed on two sides of the fixing base 511, and a limiting groove 516 formed on the periphery of the escape hole 512.

The escape hole 512 is located between the inverting end 513 and the connecting end 514, and the two supporting rods 54 are connected between the connecting end 514 and the fixing frame 52, so that the connecting end 514 of the movable platform 51 can be The top end of the fixed frame 52 is separated and pivoted by an angle, and the movable platform 51 is 90 degrees from the fixed frame 52.

Since the movable platform 51 is a freely spread design that can be separated or reset from the top end of the fixed frame 52, it does not occupy space, and does not damage the aesthetics of the building 3, and the base unit 5 needs to be used. The small number of parts will reduce the time and cost of application, which is beneficial to the promotion in the market.

In actual implementation, the arrangement of the fixed frame 52 may be omitted, and the movable platform 51 may be vertically disposed on the wall surface, the balcony or the door and window of the building 3, depending on the use requirements and the structure of the building 3, It should not be limited to those disclosed.

It should be noted that, since the movable platform 51 can be vertically disposed on the wall surface of the building 3 or separated from the top end of the fixed frame 52 and pivoted at an angle, the movable platform 51 can be protruded from On the wall surface of the building 3, when the building 3 is in a fire, the movable platform 51 protruding from the wall surface of the building 3 is available for the escaper to come out from the door and window of the building 3, and has not yet entered The space in which the activity platform 51 stands or rides to reduce the fear of the escaper from being at a height and having nowhere to stand, and to improve the safety of the escape process.

The support rod 54 has a first connecting rod 541 connected to the top end of the fixed frame 52, a second connecting rod 542 connected to the connecting end 514 of the movable platform 51, and a pivoting connection between the first and second ends. Connecting rod The first and second connecting rods 541, 542 can be folded together by the pivoting member 543, and at the same time, the connecting end 514 of the movable platform 51 is determined from the fixed frame. 52 top separation or not.

Further, the first and second connecting rods 541 and 542 for the opposite folding are accommodated therein through the receiving grooves 515 disposed on the two sides of the fixing base 511 to reduce the direct receiving of the two supporting rods 54. Intrusion of sunlight or rain, and aging aging, to extend the life of the supporting platform 51 and improve the stability of the connection.

Referring to FIG. 4 and FIG. 5, the escape unit 6 includes an escape carrier 61 disposed in the escape hole 512, and a descending rope set 62 disposed in the accommodation space 510 and connected to the escape carrier 61. And a limiting member 63 disposed on the fixing base 511 and engaging with the escape carrier 61.

The escape carrier 61 has a telescopic tube body 611 and a bottom cover 612 that closes the bottom of the telescopic tube body 611. When the telescopic tube body 611 is moved away from the bottom cover 612, the telescopic tube body The 611 and the bottom cover 612 define an escape space 610. The escape space 610 carries at least one escaper therein. When the telescopic tube body 611 is retracted toward the bottom cover 612, the bottom cover can be folded. On 612.

In actual implementation, the telescopic tube body 611 is a commercially available plastic reinforced corrugated hose. Since such a plastic telescopic tube can be commonly used in various air ducts and is a conventional technique, it will not be described here.

Furthermore, the descending rope set 62 has a plurality of pulleys 621 disposed in the accommodating space 510, a plurality of reducers 622 connected to the pulleys 621, and a plurality of pulleys 621 disposed on each of the pulleys 621 and coupled to the escape carrier. A descending rope 623 having a top end of the telescopic tube body 611 of 61.

The plurality of descending ropes 623 can drive the corresponding pulley 621 to rotate, and the speed reducer 622 can control the rotational speed of the pulley 621 to simultaneously control the falling of the escape carrier 61 connected to the plurality of descending ropes 623. The speed will not fall too fast, and it will be dangerous.

In addition, each descending rope 623 has a descending section 624 connected to the escape carrier 61, a winding section 625 wound around the pulley 621, and a stretching section 626 away from the descending section 624. The stretch section 626 is exposed outside the accommodating space 510.

The limiting member 63 has an insertion section 631 which is disposed on the escape carrier 61 and is substantially inverted U-shaped, and is disposed perpendicular to the insertion section 631 and can be extended to the limit of the movable platform 51. The control rod 632 is slidable in the slot 516. The insertion section 631 of the escape carrier 61 determines whether the telescopic tube 611 of the escape carrier 61 is folded over the bottom cover 612.

In actual implementation, when the control rod 632 slides in the direction of the escape perforation 512 of the movable platform 51, the insertion section 631 can clamp and fix the escape carrier 61 in the escape perforation 512, and conversely, when the control When the rod 632 slides away from the escape perforation 512, the insertion section 631 is separated from the escape carrier 61 to disengage the escape carrier 61 from the escape perforation 512.

The escape carrier 61 is movable relative to the movable platform 51 between a non-escape position A and an escape position B. When the non-escape position A is located, the escape carrier 61 is engaged with the limit member 63 and It is limited to the escape perforation 512 of the activity platform 51.

On the other hand, when the escape position B is located, the escape carrier 61 is not locked with the limiting member 63 and can be separated from the movable platform 51 by the descending rope group 62, and slowly escapes from the escape hole 512. decline.

It is worth mentioning that, by the stretching section 626 exposed outside the accommodating space 510, when the escape carrier 61 is gradually lowered from the escape hole 512, the drawing of the hoisting rope 623 can be pulled. The extension section 626 resets the escape carrier 61 connected to the descending rope 623 to the escape perforation 512 of the movable platform 51 for other personnel to escape.

As described above, by the setting of the limiting member 63, the convenience of separating or fixing the escape carrier 61 from the escape perforation 512 can be improved. And the surrounding of the bottom cover 612 and the bottom cover 612 define a closed escape space 610, which can greatly reduce the fear generated by the escaper from the height of the escape carrier 61. The escape space 610 is more Multiple escapers can be equipped at the same time for children and adults or old people and adults to escape together, thus increasing the confidence and security of escape. All kinds of designs are based on human care to meet the needs of users of different ethnic groups.

Referring to Figures 6, 7, and 8, the control unit 7 includes a controller 71 disposed on the building 3, and is disposed on the fixed frame 52 and interferes with the connecting end 514 of the movable platform 51. And a control switch 72 electrically connected to the controller 71, and an inductor 73 disposed in the building 3 and electrically connected to the controller 71.

The controller 71 can control the opening and closing of the control switch 72, and the sensor 73 can detect an external environmental variable and send a sensing signal to the controller 71 to control the control switch 72 to operate. The connecting end 514 of the movable platform 51 is not interfered by the control switch 72 and is separated from the top end of the fixed frame 52 and perpendicular to the building 3.

Herein, the environmental variables detected by the sensor 73 are selected from the group consisting of ambient temperature, environmental smoke, environmental pressure, environmental vibration, environmental humidity, and the like. In actual implementation, other functions may be selected. The device 73 should not be limited to this disclosure.

Further, when the connecting end 514 of the movable platform 51 is not interfered by the control switch 72 and is separated from the top end of the fixing frame 52 and perpendicular to the building 3, the first and second connecting rods 541 and 542 are in a straight line. At the same time, the movable platform 51 is separated from the top end of the fixed frame 52 and is 90 degrees with the fixed frame 52. Conversely, when the connecting end 514 of the movable platform 51 is interfered by the control switch 72, it is fixed to the fixed In the frame 52, the first and second connecting rods 541 and 542 are folded in the receiving groove 515 by the pivoting member 543.

In addition, the control unit 7 further includes a loudspeaker 74 disposed on the building 3 and electrically connected to the controller 71, when the control When the controller 71 receives the sensing signal from the sensor 73, the controller 71 controls the loudspeaker 74 to emit a warning sound.

The external environment variable in the building 3 is detected by the sensor 73, and the sensing signal is sent to the controller 71 to control the control switch 72 to automatically convert the movable platform 51 into the escape. The automatic operation of position B will shorten the time for personnel to operate the descending device. In addition, the loudspeaker 74, which can issue a warning sound, can prompt the personnel in the building 3 to escape as quickly as possible, so as to avoid missing the golden opportunity of escape. Reduce casualties and increase chances of escape.

Referring to FIG. 9, since the location and floor of the fire are unknown factors, when the descending device is installed on different floors of the building 3, the base unit 5 located on the lower floor above the wall of the building 3 can be staggered. Set the position for the escaper to avoid the location of the fire, and take the escape vehicle 61 to the next floor, which can reduce the height of the descent, avoid the fear of high risk of escape, and then the fire The floor is uncertain, and the evacuation to the first floor will only lead to the crowded situation. It will not be easy to escape. By setting up the fire escape descending device of the present invention on each floor, the crowd can be evacuated in time to improve the chance of escape.

It can be seen from the description of the above preferred embodiments that the fire escape descent device of the present invention does have the following enhancements:

First, reduce the fear of use

The escapeable space 610 is defined by the telescopic tube body 611 and the bottom cover 612, which can reduce the fear generated by the escaper from the height of the escape carrier 61, and the escape space 610 can be simultaneously carried Multiple escapers to increase confidence and security in escape.

Second, improve the safety of use

a movable platform 51 protruding from the wall surface of the building 3, for allowing the escaper to exit the door and window of the building 3, and having not entered the standing or riding space in the movable platform 51, Reduce fear and improve the safety of the escape process. Furthermore, the receiving slots 515 are disposed on the two sides of the fixing base 511, and the first and second connecting rods 541 and 542 for the opposite folding are received therein to reduce the direct support of the two supporting rods 54 by sunlight. Or the intrusion of rain, and the aging of the troubles, thereby extending the service life and improving the stability of the connection.

Third, improve the chance of escape

The external environment variable in the building 3 is detected by the sensor 73, and the sensing signal is sent to the controller 71 to control the control switch 72 to be activated, so that the movable platform 51 is automatically switched to the escape position. B, in order to shorten the time for personnel to escape, and the loudspeaker 74 that can issue a warning sound can prompt the personnel in the building 3 to escape as quickly as possible, so as to avoid missing the golden opportunity of escape and reduce casualties, thereby increasing the chance of escape.

Fourth, the aesthetics of the building 3 are not impaired

The movable platform 51 is a free-expanding design that can be separated or reset from the top end of the fixed frame 52, and does not occupy space, and does not damage the appearance of the outer wall of the building 3, and the base unit 5 The number of components to be used is small, which will reduce the time and cost of application, and is beneficial to the promotion in the market.

In summary, the fire escape descending device of the present invention, by means of the base unit 5 disposed on the building 3, and the escape unit 6 disposed in the escape hole 512, can effectively achieve space saving, and the closed type The escape vehicle 61 can reduce the fear of the escaper. When the movable platform 51 is in the non-escape position A, it is installed on the wall of the building 3, and when the disaster occurs, the control unit is transmitted through the control unit. The sensor 73 of the 7 detects the external environment variable in the building 3, and sends the sensing signal to the controller 71, so that the controller 71 controls the control switch 72 to operate, so that the movable platform 51 automatically Switch to the escape position B for the escape of the personnel, so as not to miss the golden opportunity of escape and shorten the escape time of the personnel, so The object of the invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

3‧‧‧Buildings

5‧‧‧Base unit

51‧‧‧Event Platform

510‧‧‧ accommodating space

511‧‧‧ fixed seat

513‧‧‧Flipping end

514‧‧‧Connected end

515‧‧‧ accommodating slots

516‧‧‧Limited slot

52‧‧‧Fixed frame

53‧‧‧Connecting port

54‧‧‧Support rod

541‧‧‧First connecting rod

542‧‧‧Second connecting rod

543‧‧‧ pivoting parts

6‧‧‧Escape unit

61‧‧‧Escape vehicle

610‧‧‧Escape space

611‧‧‧Retractable pipe body

612‧‧‧ bottom cover

B‧‧‧Escape location

Claims (9)

The utility model relates to a fire escape descending device, which is suitable for being installed on a building and comprises: a base unit comprising a movable platform disposed on a wall of the building, the movable platform having a surrounding space defining a receiving space And a escape hole provided on the fixed seat; and an escape unit comprising an escape carrier disposed in the escape hole, disposed in the accommodating space and a descending rope set connected to the escape carrier, and a limiting member disposed on the fixing seat and engaging with the escape carrier, wherein the descending rope set has a plurality of disposed in the accommodating space a pulley, a plurality of reducers connected to the pulleys, and a plurality of descending ropes disposed on each of the pulleys and connected to the escape carrier; the escape carrier is movable in a non-escape position relative to the movable platform Moving between the escape positions, when located in the non-escape position, the escape vehicle is interlocked with the limit member and is limited to the escape perforation of the movable platform. When the escape position is located, the escape vehicle does not Limiter And by mutually engaging the cord set ramping down the activity of the isolated platform and escape from the perforations down slowly. The fire escape descent device of claim 1, wherein the base unit further comprises a fixing disposed on a wall of the building. a frame, a connecting port formed on the fixing frame, and two supporting rods, wherein the movable platform is correspondingly disposed on the connecting port, and further has a flip end pivotally connected to the bottom end of the fixing frame, and an opposite connection End, the escape perforation is located between the inverting end and the connecting end, and the two supporting rods are connected to the connecting end and the fixing frame, so that the connecting end of the movable platform can be separated and pivoted from the top end of the fixing frame Turn a corner. The fire escape descent device of claim 2, further comprising a control unit comprising a controller disposed on the building, and a connection on the fixed frame and connected to the movable platform a control switch that is in contact with the terminal and electrically connected to the controller, the controller can control the opening and closing of the control switch, so that the connecting end of the movable platform is not interfered by the control switch, and from the top of the fixed frame Separate and perpendicular to the building. The fire escape descending device according to claim 3, wherein the escape carrier has a telescopic tube body and a bottom cover that closes the bottom of the telescopic tube body, and the descending rope group has the descending The rope is connected to the top end of the telescopic tube body. When the telescopic tube body is stretched and moved away from the bottom cover, the telescopic tube body and the bottom cover surround an escape space, and when the telescopic tube body is close to the bottom When the cover is retracted, it can be folded on the bottom cover. The fire escape descending device according to the fourth aspect of the invention, wherein the movable platform further has a limiting slot formed on the periphery of the escape perforation, and the limiting member has a clip on the escape carrier. And an inverted U-shaped insertion section, and a vertical setting with the insertion section and extending to the a sliding control lever in the limiting slot, when the lever slides in the direction of the escape perforation, the insertion section clamps the escape carrier in the escape perforation, when the lever is away from the escape perforation direction When slipping, the insertion section is separated from the escape carrier to disengage the escape carrier from the escape perforation. The fire escape descent device of claim 5, wherein each descending rope has a descending section connected to the escape carrier, a winding section wound on the pulley, and a winding section Moving away from the stretched section of the descending section, the stretched section is exposed outside the accommodating space, and after the escape carrier is gradually lowered from the escaped perforation, the stretch can be stretched by stretching the descending rope The segment resets the escape carrier connected to the descending rope to the escape perforation of the movable platform. The fire escape descent device of claim 6, wherein the control unit further comprises a sensor disposed in the building and electrically connected to the controller, the sensor detecting an external environmental variable And sending a sensing signal to the controller to control the control switch to act. The fire escape descent device of claim 7, wherein the control unit further comprises a loudspeaker disposed in the building and electrically connected to the controller, when the controller receives the sensor When the sensing signal is sent, the controller controls the loudspeaker to emit a warning sound. The fire escape descending device according to claim 8, wherein the support rod has a first connecting rod connected to the top end of the fixing frame, and a second connecting rod connected to the connecting end of the movable platform. And a pivoting member pivotally connected between the first and second connecting rods, and two of the fixing seats The side is respectively provided with a pair of receiving slots which are arranged by the first and second connecting rods. When the connecting end of the movable platform is not interfered by the control switch, and is separated from the top of the fixing frame and perpendicular to the building, the first The two connecting rods are in a straight line. When the connecting end of the movable platform is interfered by the control switch and fixed in the fixed frame, the first and second connecting rods are folded by the pivoting member. It is accommodated in the slot.