Refuge device

Abstract

The utility model aims to provide a refuge device which is smooth in unfolding action and excellent in action reliability. A refuge device (10) is provided with: a ladder device (13) which is formed by connecting both ends of a plurality of pedals (12) to a pair of pillars (11) so as to be vertically rotatable, and which is unfolded by vertically rotating the pedals (12) to a horizontal posture by means of self-weight; a brake rope (14) which is routed between the pillars (11), has an excess length portion (14a) inserted through the inside of a tubular member (15) that is longer in the longitudinal direction of the ladder device (13), and is pulled out from the tubular member (15) as the ladder device (13) expands; and a damping device (16) which is housed inside the tubular member (15), is connected to the excess length portion (14a) of the brake rope (14), and reduces the expansion speed of the ladder device (13) by suppressing the pulling-out speed of the brake rope (14) from the tubular member (15).

Description

Technical Field

[0001] The utility model relates to a refuge device. Background Art

[0002] As a ladder device that is unfolded from a storage state to a use state, a ladder device described in Patent Document 1 is conventionally known. In the evacuation ladder described in Patent Document 1, the ladder section A is composed of a fixed column 11 fixed to a building and a movable column 12 with a plurality of ladder rungs 13 arranged between the fixed column 11, and the protective fence section B is composed of a movable column 12 and a fence column 15 with a plurality of cross members 14 arranged between the movable column 12, and the cross members 14 are folded while rotating by bringing the fence column 15 close to the movable column 12. In the storage state of the cross member 14, the opposing interval between the fence column 15 and the movable column 12 is maintained at an interval away from the close contact state between the fence column 15 and the movable column 12, and the cross member 14 maintains an angle relative to the plumb line.

[0003] When the fixed column 11 and the movable column 12 are in close contact, these fixed columns 11 and movable columns 12 are combined with each other to form a storage space, and the ladder section A and the protective fence section B are stored in the storage space. On the other hand, the ladder device is provided with a locking mechanism for maintaining the close contact state of the fixed column 11 and the movable column 12, or releasing the close contact state of the fixed column 11 and the movable column 12 in the storage state of the ladder section A. And, when the above-mentioned close contact state is released by the locking mechanism, the fixed column 11 and the movable column 12 are separated, the ladder section A is in the extended state, and the protective fence section B automatically becomes the extended state due to the dead weight of the fence column 15.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2018-028198 Utility Model Content

[0005] Issues to be Solved by Utility Models

[0006] However, in the above-mentioned conventional example, the movable pole 12 and the fence pole 15 are deployed violently, which poses a problem in safety.

[0007] The utility model is completed in order to solve the above disadvantages, and its purpose is to provide a refuge device, which has smooth deployment action and excellent action reliability.

[0008] Solutions to Solve Problems

[0009] According to the utility model, the above object is achieved by the following refuge device, which has:

[0010] A ladder device in which both ends of a plurality of steps are connected to a pair of pillars so as to be freely rotatable vertically, and the steps 12 are vertically rotated to a horizontal position by their own weight and then deployed;

[0011] a brake rope which is routed between the pillars and has a surplus length inserted into an interior of a tubular member which is longer in the longitudinal direction of the ladder device and is pulled out from the tubular member as the ladder device is deployed; and

[0012] A damping device is housed inside the tubular member and connected to the excess length of the brake rope to suppress the pulling-out speed of the brake rope from the tubular member and slow down the deployment speed of the ladder device.

[0013] According to the utility model, the refuge device is formed so that the brake rope pulled out by the weight of the ladder device is braked by the damping device. The ladder device is formed by connecting the two ends of the pedal to a pair of pillars so that the pedal can rotate vertically and freely, so that the pedal rotates vertically from a longitudinal position to a horizontal position, so that the pair of pillars are unfolded from a close folded state to a separated unfolded state. The brake rope is wired between the pillars in a manner that is at least not parallel to the pedal, and is pulled out due to the expansion of the interval between the pillars accompanying the unfolding. The damping device reduces the pulling speed, so that the unfolding speed of the ladder device is slowed down to a safe level.

[0014] In addition, the remaining length of the brake rope is inserted into the tubular member that is longer in the length direction of the ladder device and is accommodated in the tubular member in an extended state, so it will not be entangled when the ladder device is unfolded or folded. The tubular member is long in the length direction of the ladder device, that is, in the length direction of the pillar, so it does not damage the overall appearance of the refuge device. It only needs to be a certain degree of long pipe material, so, for example, it can be composed of a longitudinal member and a pillar that connects the ladder device to the wall of the building along its length direction. In this way, when the longitudinal member is effectively used as a storage unit for the brake rope, the installation of the storage unit for the brake rope and the storage space required in the past can be substantially saved.

[0015] Furthermore, as described above, by controlling the pulling-out speed of the brake rope stored in the tubular member using the damping device similarly arranged inside the tubular member, it is also possible to save the installation space of the damping device that was previously required. Even when the interior of the tubular member is narrow, the damping device can apply a load to the movement of the brake rope in the pulling-out direction via a chain and a sprocket, etc., as shown in the embodiment described later, and can be arranged at an appropriate position within the travel path range of the brake rope stored in an extended state.

[0016] In this way, in addition to making it difficult to pull out the brake rope, if a force is also applied in the pulling-in direction, the entanglement of the brake rope when storing it can be effectively prevented. In addition, the brake rope can be easily stored inside the tubular member when storing the ladder device, and the ladder device is difficult to unfold, so the braking burden of the damping device can be reduced. The force-applying unit can be composed of a weight in addition to the spring, etc. As described above, the brake rope extending in the longitudinal direction of the ladder device, that is, the vertical direction, can be given a force by a tension spring, etc., and can also be composed of a weight by setting the pulling-in position inside the tubular member to a high position. If the force is applied by the weight, the force in the pulling-in direction can be applied stably for a long time. In addition, by applying a force to the brake rope in the pulling-in direction in this way, the load when the ladder device is pressed down to rotate the pedal vertically upward from the horizontal posture to the longitudinal posture can be reduced, and for example, the ladder device can be easily accommodated manually.

[0017] In addition, if one of the pillars in the ladder device is connected to the building wall via a plurality of connecting rods that can rotate vertically, the ladder device can be easily stored along the building wall, and can be easily moved to face the refuge opening opened on the building wall when in use. In this case, the connecting rod body also rotates due to its own weight like the pedal, so there is no need to apply power for the deployment action from the outside. If the brake rope is also pulled out for the deployment using the own weight, the deployment speed can be made safe. If the brake rope and the damping device are stored in the fixed longitudinal member that connects the opposite end of the pillar of the connecting rod body to the building wall, they will not move due to the deployment action, so the operation reliability can be further improved.

[0018] Furthermore, a utility model is proposed that can make the deployment action of such an evacuation device that is deployed in multiple stages via a connecting rod body smooth and have excellent operation reliability. According to the utility model, the evacuation device has:

[0019] A ladder device in which both ends of a plurality of steps are vertically rotatably connected to a pair of pillars, wherein one of the pillars is connected via a plurality of connecting rods vertically rotatable relative to a fixed longitudinal member fixed to a wall surface of a building, and the steps and the connecting rods are vertically rotated to a horizontal position by their own weight to be deployed; and

[0020] A brake rope is wired from the fixed longitudinal member through one of the pillars to the other pillar not connected to the link body, and the excess length is stored in the brake rope storage unit, and a damping device formed in the brake rope storage unit resists the brake rope being pulled out from the brake rope storage unit as the ladder device is deployed,

[0021] The structure is such that the pull-out length of the brake rope between one of the pillars having a large rotational load and the fixed longitudinal member is made larger than that between the pillars, thereby reducing the difference in rotational speed between the link body and the pedal.

[0022] In the present invention, the brake rope for suppressing the pulling-out speed from the brake rope storage unit by the damping device is routed from the fixed longitudinal member fixed on the wall of the building through one of the pillars to the other pillar, and the rotation of both the connecting rod body and the pedal is braked, so that the ladder device can be safely and smoothly deployed due to its own weight. In addition, when the rotation speed of both the connecting rod body and the pedal is braked by the continuous single brake rope, the load applied when the connecting rod body rotates is the connecting rod body and the ladder device, i.e., a pair of pillars and the pedal, while the load applied when the pedal rotates is only the pedal and one of the pillars, so that the rotation speeds thereof are different due to the difference in load. In order to eliminate this situation, in the present invention, the brake rope is configured so that the pulling-out length of the portion between the fixed longitudinal member and one of the pillars, i.e., corresponding to the connecting rod body, is longer than the pulling-out length of the portion between the pillars, i.e., corresponding to the pedal. Therefore, by making the amount of the brake rope pulled out per unit rotation angle of the connecting rod body larger than that of the pedal, the difference in rotation speed between the connecting rod body that rotates under a relatively large load and the pedal that rotates under a relatively small load can be reduced, and the deployment action of the ladder device can be made smoother. For example, as shown in the embodiment described later, the length of the parts of the brake rope corresponding to the connecting rod body and the pedal can be adjusted by making the wiring angles of the brake rope in these parts different relative to the connecting rod body and the pedal. In addition, in the utility model, the brake rope storage unit that accommodates the brake rope can be configured to have a pulley or the like for winding and storing the brake rope in addition to having a tubular component in which the brake rope can be inserted.

[0023] In the utility model, the ladder device is provided with an arm body that connects the other side of the support to the wall of the building when the step is rotated vertically to a horizontal position and unfolded. Thus, when the ladder device is unfolded, the arm body is connected to the wall of the building, which can prevent the ladder device from shaking and improve the sense of stability during use.

[0024] Specifically, the solutions of the present utility model are as follows.

[0025] Scheme 1 is a refuge device, characterized in that it comprises: a ladder device formed by vertically rotatably connecting the two ends of a plurality of pedals to a pair of pillars and utilizing its own weight to vertically rotate the pedals to a horizontal position and then unfold; a brake rope which is wired between the pillars and has an excess length inserted into the interior of a tubular component which is longer in the length direction of the ladder device and is pulled out from the tubular component as the ladder device is unfolded; and a damping device which is accommodated in the interior of the tubular component and is connected to the excess length of the brake rope and which suppresses the pulling speed of the brake rope from the tubular component and slows down the unfolding speed of the ladder device.

[0026] The second solution is an evacuation device based on the first solution, characterized in that a force applying unit for applying force to the brake rope in a pulling direction is arranged inside the tubular member.

[0027] The third scheme is an evacuation device based on the first or second scheme, characterized in that the ladder device is configured to connect one of the pillars via a plurality of connecting rod bodies that can rotate vertically relative to a tubular fixed longitudinal member fixed to the wall of the building, and protrude from the wall of the building by the vertical rotation of the connecting rod body to a horizontal posture due to its own weight.

[0028] The excess length of the brake rope and the damping device are accommodated in the interior of the fixed longitudinal component, slowing down the deployment speed of the ladder device and the protrusion speed from the wall of the building.

[0029] Scheme 4 is a refuge device, characterized in that it comprises: a ladder device formed by vertically rotatably connecting the two ends of a plurality of pedals to a pair of pillars, and connecting one of the pillars via a plurality of connecting rod bodies that are vertically rotatable relative to a fixed longitudinal part fixed on the wall of a building, and utilizing its own weight to vertically rotate the pedals and the connecting rod bodies to a horizontal posture for deployment; and a brake rope accommodating unit that accommodates the excess length of the brake rope and resists the brake rope pulled out of the brake rope accommodating unit as the ladder device is deployed, so that the pulled-out length of the brake rope between one of the pillars with a large rotational load and the fixed longitudinal part is larger than that between the pillars, thereby reducing the rotational speed difference between the connecting rod body and the pedal.

[0030] Scheme 5 is a refuge device based on scheme 4, characterized in that the ladder device is provided with an arm body that connects the other side of the support to the wall of the building when the step is rotated vertically to a horizontal position and unfolded.

[0031] Utility Model Effect

[0032] As apparent from the above description, according to the present invention, it is possible to provide an evacuation device that has a smooth deployment operation and excellent operation reliability, thereby enabling safe and rapid evacuation from disasters. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a perspective view showing the storage state of the evacuation device.

[0034] Figure 2 It is a perspective view of the evacuation device showing that the ladder device is folded in the use position.

[0035] Figure 3 It is a perspective view showing the state of use of the evacuation device.

[0036] Figure 4 1 is a diagram for explaining the unfolding operation of the ladder device, and is a perspective view showing a state in which the ladder device is in a folded posture at a storage position.

[0037] Figure 5 1 is a diagram for explaining the unfolding operation of the ladder device, and is a perspective view showing a state in which the ladder device is in a folded posture in a use position.

[0038] Figure 6 1 is a diagram for explaining the unfolding operation of the ladder device, and is a perspective view showing a state in which the ladder device is in an unfolded posture at a use position.

[0039] Figure 7 yes Figure 6 The partially enlarged view is a diagram illustrating the wiring status of the brake rope.

[0040] Explanation of symbols

[0041] BW—building wall, 10—evacuation device, 11—pillar, 11A—one of the pillars, 11B—the other of the pillars, 12—pedal, 13—ladder device, 14—brake rope, 14a—excess length, 14b—wire rope, 14c—chain, 15—tubular component, 16—rotary damper (damping device), 17—weight (force-applying unit), 18—arm body, 19—fixed longitudinal component, 20—connecting rod (connecting rod body), 21—brake rope accommodating unit, 22—arm bearing member, 23—operating part, 24—pulley, 25—storage part. DETAILED DESCRIPTION

[0042] Figure 1 The evacuation device 10 of the present invention is shown in the stored state. Figure 3 The figure shows the use state of the refuge device 10 of the present invention. The refuge device 10 includes a fixed longitudinal member 19 (tubular member 15) fixed to the wall of the building by a fixing part 26 and a ladder device having a plurality of steps 12 on a pair of pillars 11. In this embodiment, the refuge device 10 is installed on a wall BW of a four-story building, and is arranged so that the ladder device 13 faces the window W1 serving as the refuge entrance on each floor of the building in the event of a disaster. An arm receiving member 22 is fixed to the lower part of the window W1 on each floor of the wall BW.

[0043] The ladder device 13 is formed by connecting the two ends of the step 12 to a pair of pillars 11 so that they can rotate freely vertically, and all the step 12 arranged at a predetermined interval in the length direction of the pillar 1 rotate synchronously, so that it can be deformed between a folded posture in which the pillar 11B on the movable side is close to the pillar 11A on the reference side and an unfolded posture in which the step 12 is roughly spaced apart and parallel to the length dimension. Each pillar 11 has a length from the window W1 on the fourth floor of the building to the ground G, and each step 12 has a length of more than half of the lateral width of each window glass W2, and is manufactured into a tubular shape by aluminum extrusion. The ladder device 13 is mounted on the building wall BW via a vertically rotatable connecting rod 20 (connecting rod body). In addition, the ladder device 13 has an arm body 18. As Figure 3 As shown, the arm 18 is mounted on the movable support 11B at the same pitch as the setting pitch of the arm receiving member 22, and is locked to the arm receiving member 22 when the evacuation device is in use, thereby connecting the movable support 11B in the use position to the building wall 4.

[0044] The connecting rod 20 holds the ladder device 13 at a predetermined distance from the building wall BW when in use. When taking refuge along the ladder device 13 with the back facing the building wall BW, the building wall BW is arranged near the back to give a sense of security. The connecting rod 20 is formed into a tubular shape with a length of about 500 mm to 600 mm by extrusion processing of aluminum, and both ends are connected to the building wall BW and the ladder device 13. In order to connect the connecting rod 20 to the building wall BW, a fixed longitudinal member 19 made of an extruded aluminum product having the same length as the above-mentioned support column 11 is fixed in the vertical direction on the building wall BW by anchor bolts (not shown), and the connecting rods 20 are arranged at predetermined intervals along the longitudinal direction thereof, so that the ladder device 13 is firmly connected to the building wall BW in the longitudinal direction thereof.

[0045] Furthermore, one end of the connecting rod 20 is connected to the support 11A on the reference side and the other end is connected to the fixed longitudinal member 19 so as to be vertically rotatable. The connecting rod 20 is vertically rotatable in a plane orthogonal to the building wall BW. Therefore, if the connecting rod 20 is in a vertical position, the ladder device 13 can be accommodated along the building wall BW. If the connecting rod 20 is in a horizontal position, the ladder device 13 can protrude from the building wall BW. Figure 3 Furthermore, the connecting rod 20 is connected to the reference side support 11A in a direction perpendicular to the step 12, so that the step 12 is vertically rotated in a plane parallel to the building wall BW, and the ladder device 13 is folded and unfolded in a direction parallel to the building wall BW.

[0046] The above connecting rod 20 adjusts the connection position relative to the reference side support 11A so that the lower end of the reference side support 11A contacts the ground G when the reference side support 11A is in a horizontal position. Similarly, the pedal 12 adjusts the connection position relative to the reference side support 11A and the movable side support 11B so that the lower ends of the two support legs contact the ground G and the support legs are in a horizontal position.

[0047] Therefore, when the refuge device 10 is not in use, Figure 1 As shown, the step 12 is in a longitudinal position, and the pair of pillars 11 are in a transverse position, so that the ladder device 13 is in a folded position that is roughly in a rod shape. In addition, in this state, by making the connecting rod 20 in a longitudinal position, the reference side pillar 11A overlaps with the fixed longitudinal member 19 from the front side of the building, and the refuge device 10 as a whole is in a folded rod shape. In this state, the pillars 11A and 11B are restrained by the unillustrated stoppers formed on each floor, which can be released by the operation unit 23, so that the refuge device 10 maintains the storage state. In this storage state, the refuge device 10 is folded along the building wall BW on one side of the window W1, so it will not become an obstacle when the window W1 is used.

[0048] On the other hand, when a fire or the like occurs, if the operating portion 23 is operated to release the stopper, the connecting rod 20 in the vertical position, strictly speaking, in the inclined position, rotates due to the load and self-weight of the ladder device 13, so that the ladder device 13, which has been stored at a position slightly higher than the ground G along the building wall BW, descends obliquely downward until its lower end contacts the ground G and moves to a use position protruding from the building wall BW (see FIG. Figure 2 ). Similarly, the step 12 rotates due to the load and self-weight of the movable side support 11B, so that the movable side support 11B along the reference side support 11A at a position slightly higher than the ground G is lowered until its lower end contacts the ground G, so that the ladder device 13 is deformed from the folded posture to the unfolded posture (refer to Figure 3 As described above, when the ladder device 13 is in the use position and the unfolded posture, the connecting rod 20 and the step 12 are in a horizontal posture. In this unfolded state, the evacuee can transfer to the step 12 facing the evacuee by simply leaning out from the window W1 to the front. In addition, when descending along the ladder device 13, the evacuee can feel the building wall BW on the back side and suppress the fear caused by the height. The load applied to the ladder device 13 by the evacuee is firmly borne by the ground G against which the lower end thereof abuts. Moreover, the arm body 18 is locked to the arm receiving member 22 to connect the support 11B on the movable side of the use position with the building wall 4, thereby preventing shaking.

[0049] In addition, in this embodiment, the evacuation device 10 is provided with a brake rope 14 and a brake rope storage unit 21 to brake the deployment operation using the self-weight, and the deployment speed is controlled by suppressing the pulling speed of the brake rope 14 gradually pulled out from the brake rope storage unit 21 as the deployment operation proceeds. Figure 7 As shown, the brake rope 14 is formed by continuously connecting the chain 14c at one end of the wire rope 14b, and the wire rope 14b is wired from the fixed longitudinal member 19 to the movable side pillar 11B via the reference side pillar 11A in an L-shape when viewed from above. The intervals between the fixed longitudinal member 19 and the reference side pillar 11A, and between the reference side pillar 11A and the movable side pillar 11B gradually increase as the ladder device 13 moves from the storage position to the use position, and deforms from the folded posture to the unfolded posture. Therefore, as the refuge device 10 is unfolded, the length of the brake rope 14 pulled out from the brake rope storage unit 21 increases. In addition, Figure 7 Among them, 24 is a pulley for changing the wiring direction of the wire rope 14b.

[0050] The brake rope storage unit 21 has: a storage portion 25 that stores the brake rope 14; a force-applying unit (weight 17) that applies force to the brake rope 14 in the direction of pulling it into the storage portion 25; and a buffer unit 27 that applies an appropriate load to the movement of the brake rope 14 from the storage portion 25 in the direction of pulling it out. The force-applying unit makes it easy to pull the brake rope 14 into the storage portion 25, and the buffer unit 27 suppresses the pulling speed of the accommodated brake rope 14 from the storage portion 25. In the present embodiment, the storage portion 25 is formed by a tubular member 15 having a long space capable of linearly accommodating the brake rope 14 in a vertical direction, and the above-mentioned fixed longitudinal member 19 is formed into a tubular shape so as to be composed of the fixed longitudinal member 19. Inside the fixed longitudinal member 19, as Figure 5 As shown, the wire rope 14b and the chain 14c extending from one end thereof are accommodated in a vertical direction from the top to the bottom, and the other end of the wire rope 14b is fixed to the movable side support 11B.

[0051] In this embodiment, the force applying unit is as follows: Figure 7 The weight 17 is connected to the free end of the chain 14c, which is the storage side end of the brake rope 14. The weight 17 disposed inside the fixed longitudinal member 19 applies force to the brake rope 14, that is, the wire rope 14b, in the direction of pulling it into the fixed longitudinal member 19 by its load.

[0052] like Figure 7As shown, the buffer unit 27 is configured by arranging a so-called one-way type rotary damper 16 (damping device) that applies a load only in one rotation direction in the above-mentioned fixed longitudinal member 19, and making the sprocket 28 connected to the rotary damper 16 mesh with the chain 14c of the brake rope 14. The rotary damper 16 applies a load to the chain 14c, that is, the brake rope 14, only in the pulling direction of pulling out from the storage portion 25 via the sprocket 28.

[0053] Therefore, if Figure 4 As shown, in the stowed state of the evacuation device 10, the movable side support 11B and the fixed longitudinal member 19 approach the reference side support 11A, and the path length extending from the fixed longitudinal member 19 to the movable side support 11B via the reference side support 11A becomes shorter, so that the wire rope 14b, that is, the brake rope 14 is in a tensioned state in which the long excess length portion 14a is pulled into the fixed longitudinal member 19 by the weight 17. Then, as shown in FIG. Figure 5 As shown in FIG. 1 , when the connecting rod 20 is vertically rotated by the load of the support column 11 and the ladder device 13 is moved from the storage position to the use position while maintaining the folded posture, the wire rope 14b is pulled out from the fixed longitudinal member 19 due to the expansion of the gap between the fixed longitudinal member 19 and the reference side support column 11A, and the pulling speed is suppressed by the rotary damper 16, so that the movement of the ladder device 13 from the storage position to the use position becomes quiet and slow. And, from this state, as shown in FIG. Figure 6 As shown, when the pedal 12 rotates vertically due to the load of the movable side support 11B and the like and the ladder device 13 deforms from the folded position to the deployed position, the wire rope 14b is further pulled out from the fixed longitudinal part 19 due to the expansion of the distance between the reference side support 11A and the movable side support 11B, and the pulling speed of the wire rope 14b is suppressed by the rotary damper 16, thereby the deformation of the ladder device 13 from the folded position to the deployed position also becomes quiet and slow.

[0054] Furthermore, in the present embodiment, the load that rotates the connecting rod 20 from the longitudinal position to the horizontal position is mainly the reference side support 11A and the movable side support 11B, whereas in the case of the step 12, only the movable side support 11B is applied. That is, in order to eliminate the situation where the force pulling the wire rope 14b when the ladder device 13 moves from the storage position to the use position is greater than the force when the ladder device 13 is deformed from the folded position to the unfolded position, and the movement and unfolding speeds therebetween are different, the wiring length of the wire rope 14b between the reference side support 11A in the use position and the fixed longitudinal member 19 is set to be longer than the length between the reference side support 11A and the movable side support 11B in the unfolded position of the ladder device 13. The wiring length of the wire rope 14b can be adjusted by changing the wiring angle of the wire rope 14b in the vertical direction, that is, by giving a slow or fast inclination to the wire rope 14b.

[0055] Therefore, in the ladder device 13 from Figure 4 The storage position shown is Figure 5 When moving from the indicated position of use, Figure 5 The folded position shown is Figure 6 Compared with the case where the deployment posture is deformed as shown, the wire rope 14b must be pulled out longer from the fixed longitudinal member 19, and the load applied by the rotary damper 16 becomes larger, thereby eliminating the difference in moving speed and deployment speed caused by the difference in load, making the deployment action of the refuge device 10 smooth.

[0056] In addition, in the above embodiments and modifications, the chain 14c is locked on the sprocket 28 of the buffer unit 27 to brake the wire rope 14b of the brake rope 14, but it can also be configured to provide a gear in the buffer unit 27 instead of the sprocket 28, and provide a rack on the brake rope 14 to be locked with the gear.

Claims

1. A refuge device, characterized in that: have: A ladder device in which both ends of a plurality of steps are vertically rotatably connected to a pair of pillars and the steps are deployed by vertically rotating to a horizontal position by their own weight; a brake rope which is routed between the pillars and has a surplus length inserted into an interior of a tubular member which is longer in the longitudinal direction of the ladder device and is pulled out from the tubular member as the ladder device is deployed; and A damping device is housed inside the tubular member and connected to the excess length of the brake rope to suppress the pulling-out speed of the brake rope from the tubular member and slow down the deployment speed of the ladder device.

2. The refuge device according to claim 1, characterized in that: A biasing unit for biasing the brake rope in a pulling-in direction is arranged inside the tubular member.

3. The refuge device according to claim 1 or 2, characterized in that: The ladder device is configured such that one of the pillars is connected via a plurality of link bodies that are vertically rotatable relative to a tubular fixed longitudinal member fixed to a wall of a building, and the link body is vertically rotated to a horizontal position due to its own weight so as to protrude from the wall of the building. The excess length of the brake rope and the damping device are accommodated in the interior of the fixed longitudinal component, slowing down the deployment speed of the ladder device and the protrusion speed from the wall of the building.

4. A refuge device, characterized in that: have: A ladder device in which both ends of a plurality of steps are vertically rotatably connected to a pair of pillars, one of the pillars is connected via a plurality of link bodies vertically rotatable relative to a fixed longitudinal member fixed to a wall of a building, and the steps and the link bodies are vertically rotated to a horizontal position by their own weight to be deployed; as well as A brake rope is routed from the fixed longitudinal member through one of the pillars to the other pillar not connected to the connecting rod body, and the excess length is accommodated by the brake rope accommodating unit, and the damping device formed in the brake rope accommodating unit resists the brake rope being pulled out from the brake rope accommodating unit as the ladder device is deployed, The pull-out length of the brake rope between one of the pillars with a large rotational load and the fixed longitudinal member is made larger than that between the pillars, thereby reducing the difference in rotational speed between the link body and the pedal.

5. The refuge device according to claim 4, characterized in that: The ladder device is provided with an arm body that connects the other of the support columns to the wall surface of the building when the step is rotated vertically to a horizontal posture and unfolded.

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