Straight folding evacuation safety ladder device

Abstract

The disclosed straight-type foldable evacuation safety ladder device comprises: a ladder member installed on the exterior wall surface of a building adjacent to a window installed in a multi-story building and deployed as a ladder by an evacuee in the event of a fire or emergency; a support member installed on the exterior wall surface and securing the deployed ladder member without shaking; and a rope member connecting the evacuee and the support member so as to be able to descend, and gripping the support member to restrain the evacuee to the support member if the evacuee's body is excessively separated from or slips away from the ladder member.

Description

Technology Field

[0001] The present invention (Disclosure) relates to a straight, foldable evacuation safety ladder device that enables rapid evacuation to a lower floor or the ground in the event of a fire or emergency in a multi-story building. Background Technology

[0002] This section provides background information related to the present disclosure, which is not necessarily prior art.

[0003] In general, multi-story buildings are becoming more common in modern times to expand living spaces and effectively utilize narrow sites.

[0004] In multi-story buildings, a main entrance for pedestrian access is typically installed, and on the opposite side, a gallery window is installed for installing veranda windows and air conditioner outdoor units. Additionally, safety railings are installed on the verandas to prevent falls.

[0005] While such multi-story buildings have advantages such as good views and various amenities inside, they have disadvantages such as being vulnerable to fire or disaster, as there is no suitable place to escape, and toxic gases and smoke can spread rapidly through elevators or stairs, potentially leading to loss of life.

[0006] Accordingly, to address the aforementioned problem, laws mandate that buildings of a certain number of stories or higher be equipped with emergency escape means for evacuation in the event of a fire or emergency; as an example of such emergency escape means, descent devices that descend along the exterior wall of a building relying on a wire rope are widely installed.

[0007] However, escape ropes are extremely difficult and dangerous for the general public to use, and because the escape speed is slow, they are rarely used in practice. Prior art literature

[0008] Korean Patent Publication No. 10-2012-0137993. The problem to be solved

[0009] The present invention (Disclosure) aims to provide a straight, foldable evacuation safety ladder device that unfolds along the exterior wall of a building through simple operation and allows the unfolded ladder to be stably fixed without shaking.

[0010] The present invention (Disclosure) aims to provide a straight, foldable evacuation safety ladder device that can restrain an evacuee to the ladder if the evacuee's body slips off the ladder during evacuation using the ladder. means of solving the problem

[0011] This section provides a general summary of the disclosure and is not a comprehensive disclosure of its full scope or all of its features.

[0012] To solve the above-mentioned problem, a straight-type foldable evacuation safety ladder device according to any one aspect of the various aspects describing the present invention may include: a ladder member installed on an exterior wall surface adjacent to a window constructed in a multi-story building and deployed as a ladder by an evacuee in the event of a fire or emergency; a support member installed on an exterior wall surface and fixed to the deployed ladder member without shaking; and a rope member connecting the evacuee and the support member so as to be lowerable, and gripping the support member to restrain the evacuee to the support member if the evacuee's body is excessively separated from or slips away from the ladder member.

[0013] In a straight-type foldable evacuation safety ladder device according to one aspect of the present invention, the ladder member comprises: a plurality of stepping stones; a fixed support member that extends vertically along the outer wall surface of a building and is fixedly installed on the outer wall surface of a building; and a movable support member that extends vertically along the outer wall surface of a building and is connected to the fixed support member along the outer wall surface of a building via the stepping stones, so as to be in contact with or away from the fixed support member. The stepping stones are installed so as to be spaced apart in the vertical direction between the fixed support member and the movable support member, wherein one end of the stepping stones is rotatably connected to the fixed support member in the vertical direction via a first hinge pin, and the other end of the stepping stones is rotatably connected to the movable support member in the vertical direction via a second hinge pin.

[0014] In a straight-type foldable evacuation safety ladder device according to one aspect of the present invention, the stepping members are horizontally spread out between a fixed support and a movable support so that the ladder member is unfolded, and when the unfolded ladder member is folded, they are folded between the fixed support and the movable support, and the fixed support and the movable support each have first and second receiving grooves formed along the longitudinal direction of the fixed support and the movable support to receive the stepping members when the ladder member is folded.

[0015] In a straight-type foldable evacuation safety ladder device according to one aspect of the present invention, the support member includes a grip frame that extends vertically along the outer wall surface of a building and is fixedly installed on the outer wall surface of a building with one side spaced apart from a movable support member; and on one side of the grip frame, a fitting groove may be formed extending along the length of the grip frame so as to be fitted and fixed when the ladder member is deployed.

[0016] In a straight-type foldable evacuation safety ladder device according to one aspect of the present invention, the support member further comprises a guide frame formed on the other side of the grip frame and extending vertically along the longitudinal direction of the grip frame, into which a rope member is inserted so as to descend; wherein the guide frame comprises: a first panel extending from the inner end of the other side of the grip frame to the outer end of the other side of the grip frame; a second panel bent vertically from the extended end of the first panel toward the outer end of the other side of the grip frame; and a third panel bent vertically from the extended end of the second panel toward the other side of the grip frame, wherein the extended end is spaced apart from the other side of the grip frame; and wherein the rope member can be inserted so as to descend along the third panel.

[0017] In a straight-type foldable evacuation safety ladder device according to one aspect of the present invention, one or more rope members may be provided in each household of a building.

[0018] In a straight-type foldable evacuation safety ladder device according to one aspect of the present invention, the rope member comprises: a rope grab that is fitted into a guide frame by an evacuee; and a rope connecting the rope grab and the evacuee; wherein the rope grab comprises: a first roller that rolls while in contact with the inner surface of a third panel; a second roller that rolls while in contact with the outer surface of a third panel; and a bracket that rotatably supports the first roller and the second roller; wherein, when the evacuee is excessively separated from or slips away from the ladder member during evacuation, the rope grab can restrain the evacuee to the guide frame by having the first roller and the second roller press the inner and outer surfaces of the third panel by means of a rope that is pulled downward by the evacuee.

[0019] In a straight foldable evacuation safety ladder device according to one aspect of the present invention, a first roller is connected to the bracket so as to be rotatable in clockwise and counterclockwise directions, and a second roller may be connected to the bracket so as to be rotatable only in counterclockwise directions.

[0020] In a straight-type foldable evacuation safety ladder device according to one aspect of the present invention, a rope grab can be inserted through the top of a guide frame.

[0021] In a straight-type foldable evacuation safety ladder device according to one aspect of the present invention, a rope grab is inserted through guide grooves that are cut downwardly inclined from the other side of the guide frame toward the inner side of the guide frame, and the guide grooves may be formed to correspond to the floor units of a building.

[0022] In a straight-type foldable evacuation safety ladder device according to one aspect of the present invention, a moving groove is formed in the bracket that extends upwardly inclined from the center of rotation of the second roller toward the third panel side, and when an evacuee is excessively separated from or slides away from the ladder member during evacuation, the center of rotation of the second roller moves along the moving groove toward the outer surface of the third panel, thereby allowing the second roller to press against the outer surface of the third panel.

[0023] In a straight-type foldable evacuation safety ladder device according to one aspect of the present invention, a rope is connected to a bracket with one end exposed to the outside of the outer surface of a third panel, and a connecting hook connected to an evacuee may be connected to the other end of the rope.

[0024] In a straight-type foldable evacuation safety ladder device according to one aspect of the present invention, an X-shaped bandage vest may be connected to the connecting link.

[0025] In a straight-type foldable evacuation safety ladder device according to one aspect of the present invention, the rope may be formed in the form of a spring.

[0026] In a straight-type foldable evacuation safety ladder device according to one aspect of the present invention, the rope may have a length such that the rope grab fitted into the guide frame does not extend beyond the upper body of the evacuee.

[0027] In a straight-type foldable evacuation safety ladder device according to one aspect of the present invention, the emergency escape safety ladder device further comprises a safety member that prevents the rope member from descending when the rope member is gripped by a support member; the safety member may include a stopper that is rotatably installed in the vertical direction on the other side of a bracket adjacent to a second roller and is elastically supported downward by a spring; and a locking projection formed on the outer surface starting end side of a third panel, extending along the longitudinal direction of the third panel, optionally formed with locking surfaces on which the stopper is hooked spaced apart in the vertical direction, and formed such that the extended end side of the stopper can enter between one locking surface and an adjacent locking surface.

[0028] In a straight-type foldable evacuation safety ladder device according to one aspect of the present invention, when a rope member is gripped by a support member, the stopper is engaged with one of the engaging surfaces, the rope grab is returned so as to be lowered, and the stopper can be disengaged from the engaged engaging surface. Effects of the invention

[0029] According to the present invention, since it is installed on the exterior wall surface of a building, it is freer from secondary damage caused by toxic gases and flames, and does not occupy any interior space of the building, thereby providing the effect of creating space.

[0030] According to the present invention, since the deployed ladder member is stably fixed to the support member without shaking, it provides the effect of reducing the fear of the evacuee.

[0031] According to the present invention, when the evacuee's body slips from the ladder member, the rope member connecting the ladder member and the evacuee is gripped by the ladder and restrains the evacuee to the ladder member, thereby providing the effect of preventing the evacuee from falling to the ground. Brief explanation of the drawing

[0032] FIG. 1 is a schematic drawing showing the state in which a straight-type foldable evacuation safety ladder device according to the present invention is installed, showing the state in which a ladder member is folded. FIG. 2 is an enlarged view schematically showing the rope member illustrated in FIG. 1. FIG. 3 is a schematic diagram showing the usage state of a straight-type foldable evacuation safety ladder device according to the present invention, showing the ladder member unfolded and the rope member fitted into the support member. FIG. 4 is a schematic diagram showing the operating state of the rope grab illustrated in FIGS. 1 to 3. FIG. 5 is a schematic diagram showing another embodiment of the rope grab illustrated in FIGS. 1 to 3. FIG. 6 is a schematic diagram showing another embodiment of a straight foldable evacuation safety ladder device according to the present invention. Specific details for implementing the invention

[0033] Hereinafter, an embodiment of the straight-type foldable evacuation safety ladder device according to the present invention will be described in detail with reference to the drawings.

[0034] The straight-type foldable evacuation safety ladder device (100) according to the present invention disclosed below is installed on the outer wall surface of a multi-story building adjacent to a window (W) installed in the multi-story building, allowing residents to quickly evacuate to a lower floor or ground in the event of a fire or emergency.

[0035] For example, the window (W) may be a veranda window or a gallery window, but the window (W) is not limited to a veranda window or a gallery window.

[0036] FIGS. 1 to 3 are schematic drawings illustrating a straight-type foldable evacuation safety ladder device according to the present invention.

[0037] Referring to FIGS. 1 to 3, the straight-type foldable evacuation safety ladder device (100) according to the present invention includes a ladder member (110), a support member (120), and a rope member (130).

[0038] First, the ladder member (110) is installed on the exterior wall of a building adjacent to a window (W) installed in a multi-story building, and in the event of a fire or emergency, it is deployed in a ladder shape along the exterior wall of the building by an evacuee.

[0039] The ladder member (110) includes a fixed support (112), a movable support (114), and a plurality of stepping stones (116).

[0040] The fixed support (112) and the movable support (114) extend vertically along the outer wall surface adjacent to the window (W) installed in the multi-story building from the top floor of the multi-story building to a position adjacent to the ground.

[0041] The fixed support (112) is typically fixed to the outer wall surface of a multi-story building via anchor bolts (B), etc., and the movable support (114) is connected to the fixed support (112) along the outer wall surface of the multi-story building via stepping stones (116) so as to be in contact with or away from the fixed support (112).

[0042] The stepping stones (116) are installed spaced apart in the vertical direction between the fixed support (112) and the movable support (114) so ​​as not to interfere with each other.

[0043] One end of the stepping stones (116) is connected to the fixed support (112) so as to be rotatable in the up and down direction via the first hinge pin (H1), and the other end of the stepping stones (116) is likewise connected to the movable support (114) so ​​as to be rotatable in the up and down direction via the second hinge pin (H2).

[0044] That is, when the movable support (114) is moved away from the fixed support (112) so that the ladder member (110) can be unfolded, the stepping stones (116) rotate around the first and second hinge pins (H1, H2) and are spread horizontally between the fixed support (112) and the movable support (114), and when the movable support (114) is moved to contact the fixed support (112) so that the unfolded ladder member (110) can be folded, the stepping stones rotate around the first and second hinge pins (H1, H2) and are folded approximately vertically between the fixed support (112) and the movable support (114).

[0045] At this time, so that the stepping stones (116) are not exposed to the outside when the ladder member (110) is folded, the fixed support (112) and the movable support (114) each have first and second receiving grooves (112a, 114a) for receiving the stepping stones (116) formed along the length direction of the fixed support (112) and the movable support (114).

[0046] In other words, the fixed support (112) is formed to have a roughly "⊂" shaped cross section and the movable support (114) is formed to have a roughly "⊃" shaped cross section, and the one end and the other end of the stepping stones (116) are each received in the first and second receiving grooves (112a, 114a) and are connected to the fixed support (112) and the movable support (114) so ​​as to be rotatable in the up and down direction via the first and second hinge pins (H1, H2).

[0047] Preferably, a conventional non-slip pad or non-slip tape, etc., may be attached to the upper side of the unfolded stepping stones (116) so that the evacuee does not slip when evacuating to the lower floor and ground using the unfolded ladder member (110), although not shown.

[0048] More preferably, the fixed support (112), the movable support (114), and the stepping stones (116) are formed so that the stepping stones (116) can be maintained in a horizontally spread state when the ladder member (110) is deployed, which is a known technique and therefore a detailed description thereof is omitted in the present invention.

[0049] That is, as long as the stepping stones (116) can maintain a horizontal state when the ladder member (110) is deployed, the stepping stones (116), the fixed support (112), and the movable support (116) may have any configuration and connection relationship.

[0050] The support member (120) is installed on the outer wall surface of a multi-story building, just like the ladder member (110), and securely fixes the deployed ladder member (110) without shaking. In addition, the support member (120) enables the rope member (130) to prevent the evacuee from falling.

[0051] The support member (120) includes a grip frame (122) into which a movable support (114) is fitted and fixed when the ladder member (110) is deployed, and a guide frame (126) into which a rope member (130) is fitted so as to descend.

[0052] The grip frame (122), like the fixed support (112) and the movable support (114), extends vertically along the outer wall surface of the multi-story building from the top floor of the multi-story building to a position adjacent to the ground.

[0053] At this time, the grip frame (122) is typically fixed to the outer wall of a multi-story building via an anchor bolt (B) or the like, so that one side is spaced apart from the movable support (114) by a predetermined distance.

[0054] And on one side of the grip frame (122), a fitting groove (124) is formed to extend along the length direction of the grip frame (122) so as to be fitted and fixed when the ladder member (110) is deployed, into which a movable support (114) is fitted.

[0055] In other words, the grip frame (122) is formed to have a roughly "⊃" shaped cross-section, and the outer surface of the movable support (114) fitted into the fitting groove (124) is tightly fixed to the inner surface of the fitting groove (124).

[0056] In this way, when the ladder member (110) is deployed, the movable support (114) is inserted into the fitting groove (124) of the grip frame (122) and fixed in close contact, so the deployed ladder member (110) is stably fixed without shaking, and thereby the fear of the evacuee using the deployed ladder member (110) can be reduced.

[0057] The guide frame (126) is integrally formed on the other side of the grip frame (122) and extends vertically along the length direction of the grip frame (122).

[0058] The guide frame (126) includes a first panel (126a) that extends from the inner end of the other side of the grip frame (112) to the outer end of the other side of the grip frame (112), a second panel (126b) that is vertically bent from the extended end of the first panel (126a) to the outer end of the other side of the grip frame (112), and a third panel (126c) that is vertically bent from the extended end of the second panel (126b) to the other side of the grip frame (112).

[0059] At this time, the extension end of the third panel (126c) is spaced apart from the other side of the grip frame (112) by a predetermined distance.

[0060] A rope member (130) is fitted into the guide frame (126) formed in this way so that it can descend along the third panel (126c).

[0061] One or more rope members (130) are provided in each household of a multi-story building adjacent to the straight-type foldable evacuation safety ladder device (100) according to the present invention, as shown in Fig. 1.

[0062] The rope member (130) connects the evacuee and the support member (120) so as to be lowered, and if the evacuee's body is excessively separated from or slips away from the ladder member (110), it is grasped by the support member (120) and restrains the evacuee to the support member (110).

[0063] The rope member (130) includes a rope grab (132) fitted into a guide frame (126) and a rope (140) connecting the rope grab (132) and the evacuee.

[0064] The rope grab (132) includes a first roller (136) that rolls while in contact with the inner surface of the third panel (126c), a second roller (138) that rolls while in contact with the outer surface of the third panel (126c), and a bracket (134) that rotatably supports the first roller (136) and the second roller (138).

[0065] At this time, the first roller (136) is connected to the bracket (134) so ​​as to be rotatable in both clockwise and counterclockwise directions, and the second roller (138) is connected to the bracket (134) so ​​as to be rotatable only in the counterclockwise direction, unlike the first roller (136).

[0066] Here, connecting the second roller (138) to the bracket (134) so ​​that it can only rotate in a counterclockwise direction is intended to prevent the evacuee from going up to the upper floor for safety, as the fire spreads to the upper floor in an instant. Since connecting the second roller (138) to the bracket (134) so ​​that it can only rotate in a counterclockwise direction is a known technique, a detailed explanation thereof is omitted.

[0067] The rope grab (132) formed in this way is fitted into the guide frame (126) through the top of the guide frame (126) so that the first and second rollers (136, 138) come into contact with the inner and outer sides of the third panel (126c) as described above by each household evacuee in the event of a fire or emergency.

[0068] Preferably, guide grooves (128) are formed in the guide frame (126) adjacent to the windows (W) of the floor units below the top floor unit so that the rope grab (132) of the rope member (130) can be connected to the guide frame (126) during evacuation from the floor units below as well.

[0069] That is, the guide grooves (128) are formed to correspond to the floor units of a multi-story building, and the guide grooves (128) are formed by cutting from the other side of the guide frame (126) to the one side of the guide frame as illustrated, and are formed to slope downward from the outside to the inside of the guide frame (126) so that the rope grab (132) does not slip out.

[0070] One end of the rope (140) is connected to a bracket (134) that is exposed to the outside of the outer side of the third panel (126c), and the other end of the rope (140) is connected to a connecting ring (142) such as a normal carabiner that connects to an evacuee.

[0071] For example, the connecting link (142) can be connected to the evacuee's belt, etc., during evacuation.

[0072] As another example, a standard 'X-band vest' can be connected to the connecting link (142), in which case the evacuee can be connected to the rope (140) simply by wearing the 'X-band vest'.

[0073] In the present invention, the material of the rope (140) is not specifically limited, but the rope (140) may be any one of a stainless steel wire rope, a polypropylene (PP) rope, a polyethylene (PE) rope, a nylon rope, a vinylon rope, and a Manila rope.

[0074] In addition, the rope (140) can be formed in a spring shape to minimize interference with the evacuee during evacuation and to facilitate storage when placed in each household.

[0075] Preferably, the rope (140) is formed to have a length such that the rope grab (132) fitted into the guide frame (126) does not extend beyond the upper body of the evacuee.

[0076] When the rope member (130) is inserted into the guide frame (126) during evacuation, if the evacuee is excessively separated from the ladder member (110) or loses balance and slides while evacuating using the unfolded ladder member (110), the rope (140) is pulled downward by the evacuee, and as the rope (140) is pulled, the rope grab (132) is tilted at a predetermined angle. At this time, the first roller (136) moves toward the inner side of the third panel (126c) and is strongly pressed against the inner side of the third panel (126c), and the second roller (138) moves toward the outer side of the third panel (126c) and is strongly pressed against the outer side of the third panel (126c), thereby restraining the evacuee who is excessively separated from the ladder member (110) or slides to the guide frame (126) (see (B) in FIG. 4).

[0077] And when the evacuee regains balance on the ladder member (110), the rope grab (132) returns to a position that allows for descent.

[0078] Preferably, the material of the first roller (136) is not particularly limited, but the second roller (138) may be provided as any one of a conventional rubber roller, a silicone roller, and a urethane roller with high friction.

[0079] Meanwhile, FIG. 6 is a drawing showing another embodiment of a rope grab, wherein the bracket (134) of the rope grab (132) is formed so that if the evacuee's body is excessively separated from or slides away from the ladder member (110), the center of rotation of the second roller (138) can be moved toward the outer side of the third panel (126c).

[0080] To this end, a moving groove (144) is formed in the bracket (134) that extends upward at an angle of approximately 45 degrees from the center of rotation of the second roller (138) toward the third panel (126c).

[0081] That is, when an evacuee is excessively separated from the ladder member (110) or loses balance and slides, the rope (140) is pulled downward by the evacuee as described above, and as the rope (140) is pulled, the rope grab (132) is tilted at a predetermined angle. At this time, the first roller (136) moves toward the inner side of the third panel (126c) and is strongly pressed against the inner side of the third panel (126c), and the second roller (138) moves toward the outer side of the third panel (126c) along the moving groove (144) and is pressed more strongly against the outer side of the third panel (126c), thereby restraining the evacuee who is excessively separated from the ladder member (110) or slides to the guide frame (126).

[0082] Meanwhile, FIG. 5 is a schematic diagram showing another embodiment of an emergency escape safety ladder device according to the present invention.

[0083] Referring to FIG. 5, the emergency escape safety ladder device (100) according to the present invention further includes a safety member (150) that prevents the rope member (130) from descending when the rope member (130) is gripped by a support member (120).

[0084] The safety member (150) includes a stopper (156) installed on the rope member (130) and a stopper portion (152) installed on the support member (120) facing the stopper (156).

[0085] The stopper portion (152) is formed on the outer side of the third panel (126c) at the starting end so as not to interfere with the second roller (138), and is formed to extend along the length direction of the third panel (126c).

[0086] In these stopper portions (152), stopper surfaces (154) on which a stopper (156) is optionally placed are formed spaced apart in the vertical direction, and the extended end of the stopper (156) is formed to enter between one stopper surface (154) and an adjacent stopper surface (154).

[0087] The stopper (156) is installed so as to be rotatable in the up and down direction on the other side of the bracket (134) adjacent to the second roller (138) so as not to interfere with the second roller (138), and is elastically supported downward by a spring (154).

[0088] That is, the stopper (156) is normally kept in a horizontal state by the spring (158), optionally rotated upward by compressing the spring (158), and then returned to a horizontal state by the restoring force of the spring (154).

[0089] The stopper (156) formed in this way is engaged with one of the engaging surfaces (154) formed by the engaging projection (152) at the same time when the rope member (130) is gripped by the support member (120), that is, when the evacuee is violently separated from the ladder or loses balance and slides, causing the rope grab (132) to tilt at a predetermined angle, thereby preventing the rope member (130) from descending.

[0090] Then, the evacuee finds balance on the ladder member (110), and the rope grab (132) returns to be lowered, and the stopper (156) is released from the locking surface (154) that is locked.

[0091] It is stated that the intrinsic technical concept of the present invention is not limited to the embodiments described above, but encompasses the scope that can be easily proposed by a person skilled in the art through substitution or modification.

[0092] Furthermore, since the terms used in the description of the present invention are selected for the convenience of explanation, in grasping the intrinsic technical concept of the present invention, they should not be limited to their dictionary meanings but should be appropriately interpreted in a sense consistent with the technical concept of the present invention.

Claims

Claim 1 A ladder member installed on the exterior wall surface of the building adjacent to a window constructed in a multi-story building, which is deployed as a ladder by an evacuee in the event of a fire or emergency; a support member installed on the exterior wall surface and which secures the deployed ladder member without shaking; and a rope member that connects the evacuee and the support member so as to be able to descend, and which is gripped by the support member to restrain the evacuee to the support member if the evacuee's body is excessively separated from or slips away from the ladder member; wherein the ladder member comprises a plurality of stepping stones; a fixed support member that extends vertically along the exterior wall surface of the building and is fixedly installed on the exterior wall surface of the building; and a movable support member that extends vertically along the exterior wall surface of the building and is connected to either come into contact with or move away from the fixed support member along the exterior wall surface of the building via the stepping stones; and wherein the support member comprises a grip frame that extends vertically along the exterior wall surface of the building and is fixedly installed on the exterior wall surface of the building such that one side is spaced apart from the movable support member. and a guide frame formed on the other side of the grip frame and extending vertically along the longitudinal direction of the grip frame, into which the rope member is inserted so as to descend; wherein the guide frame comprises: a first panel extending from the inner end of the other side of the grip frame to the outer end of the other side of the grip frame; a second panel bent vertically from the extension end of the first panel toward the outer end of the other side of the grip frame; and a third panel bent vertically from the extension end of the second panel toward the other side of the grip frame, wherein the extension end is spaced apart from the other side of the grip frame; wherein the rope member is inserted so as to descend along the third panel, and the rope member comprises a rope grab inserted into the guide frame by an evacuee; and a rope connecting the rope grab and the evacuee; wherein the rope grab comprises: a first roller that rolls while in contact with the inner surface of the third panel; and a second roller that rolls while in contact with the outer surface of the third panel.and a bracket that rotatably supports the first roller and the second roller; wherein the rope grab is a straight-type foldable evacuation safety ladder device in which, if an evacuee is excessively separated from or slips from the ladder member during evacuation, the first roller and the second roller press the inner and outer surfaces of the third panel by means of the rope pulled downward by the evacuee, thereby restraining the evacuee to the guide frame. Claim 2 A straight-type foldable evacuation safety ladder device according to claim 1, wherein the stepping members are installed spaced apart in the vertical direction between the fixed support and the movable support, wherein one end of the stepping members is rotatably connected to the fixed support in the vertical direction via a first hinge pin, and the other end of the stepping members is rotatably connected to the movable support in the vertical direction via a second hinge pin. Claim 3 A straight-type foldable evacuation safety ladder device according to claim 2, wherein the stepping members are horizontally spread between the fixed support and the movable support so that the ladder member is unfolded, and when the unfolded ladder member is folded, they are folded between the fixed support and the movable support, and the fixed support and the movable support each have first and second receiving grooves formed along the longitudinal direction of the fixed support and the movable support to receive the stepping members when the ladder member is folded. Claim 4 A straight-type foldable evacuation safety ladder device according to claim 2, wherein a fitting groove is formed on one side of the grip frame to extend along the longitudinal direction of the grip frame, into which the movable support member is fitted and fixed when the ladder member is deployed. Claim 5 delete Claim 6 In claim 1, the rope member is a straight, foldable evacuation safety ladder device provided in one or more units of the building. Claim 7 delete Claim 8 A straight foldable evacuation safety ladder device according to claim 1, wherein the first roller is connected to the bracket so as to be rotatable in clockwise and counterclockwise directions, and the second roller is connected to the bracket so as to be rotatable only in the counterclockwise direction. Claim 9 In claim 1, the rope grab is a straight, foldable evacuation safety ladder device fitted through the top of the guide frame. Claim 10 A straight-type foldable evacuation safety ladder device according to claim 1, wherein the rope grab is inserted through guide grooves that are cut downwardly inclined from the other side of the guide frame toward the inner side of the guide frame, and the guide grooves are formed to correspond to the floor units of the building. Claim 11 A straight-type foldable evacuation safety ladder device according to claim 1, wherein the bracket has a moving groove formed therein that extends upwardly inclined from the center of rotation of the second roller toward the third panel, and when an evacuee is excessively separated from or slides away from the ladder member during evacuation, the center of rotation of the second roller moves along the moving groove toward the outer surface of the third panel so that the second roller presses against the outer surface of the third panel. Claim 12 A straight-type foldable evacuation safety ladder device according to claim 1, wherein one end of the rope is connected to the bracket exposed to the outside of the outer surface of the third panel, and the other end of the rope is connected to a connecting hook connected to an evacuee. Claim 13 A straight-type foldable evacuation safety ladder device according to claim 12, wherein an X-shaped band vest is connected to the connecting link. Claim 14 In claim 10, the rope is a straight, foldable evacuation safety ladder device formed in the shape of a spring. Claim 15 In claim 10, the rope is a straight, foldable evacuation safety ladder device having a length such that the rope grab fitted into the guide frame does not extend beyond the upper body of the evacuee. Claim 16 The straight-type foldable evacuation safety ladder device according to claim 1 further comprises: a safety member that prevents the rope member from descending when the rope member is gripped by the support member; wherein the safety member comprises: a stopper that is rotatably installed in the vertical direction on the other side of the bracket adjacent to the second roller and is elastically supported downward by a spring; and a stopper portion formed on the outer surface starting end side of the third panel, extending along the longitudinal direction of the third panel, optionally formed with catch surfaces on which the stopper rests spaced apart in the vertical direction, and formed such that the extended end side of the stopper can enter between one of the catch surfaces and the adjacent catch surface. Claim 17 A straight-type foldable evacuation safety ladder device according to claim 16, wherein the stopper is engaged with one of the engaging surfaces when the rope member is gripped by the support member, the rope grab is returned so as to be lowered, and the stopper is disengaged from the engaged engaging surface.

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