Safety ladder device

Abstract

The present invention relates to a safety ladder device, which has the main components including a connecting rod (10), a ladder section (20), a safety cover (30), a safety door (40), and a high-altitude space section (50), such that the length of the ladder section can be flexibly changed to match the height of the structure to improve on-site construction efficiency, a high-altitude space section connected to the ladder section to secure sufficient workspace, and a safety cover, a safety door, and a non-powered moving module to effectively prevent a user from falling.

Description

Technology Field

[0001] The present invention relates to a safety ladder device, and more specifically, to a safety ladder device that improves on-site constructability by allowing the length of the ladder section to be flexibly changed to match the height of the structure, secures sufficient working space by providing a high-altitude space connected to the ladder section, and effectively prevents a user from falling through a safety cover, a safety door, and a non-powered moving module. Background Technology

[0003] Generally, ladders are installed on steel or concrete structures within a workplace and used as an auxiliary means of moving between high and low areas, serving as a passageway between floors. This contributes to enhancing the convenience of movement for workers between various facilities with differences in floor height.

[0004] However, the reality is that worker falls frequently occur during work processes involving ladders.

[0005] Accordingly, in the previously disclosed published patent No. 10-2025-0054775, a ladder section comprising a pair of vertical supports and a plurality of footrests installed on the pair of vertical supports at a set interval in the vertical direction; a safety guide section comprising a plurality of safety guide members installed on the pair of vertical supports at a set interval in the vertical direction, forming a passage for a worker to pass through; a safety plate section installed on at least one of the plurality of safety guide members and opening and closing the passage; and an operating section connected to the safety plate section and operating the safety plate section so that the safety plate section opens and closes the passage. A technology has been previously presented comprising: a safety work protection part coupled to the upper part of a ladder part and connected to a safety guide bar; and a safety plate part comprising a safety plate fixing part installed on the safety guide bar, a safety plate main body part connected to the safety plate fixing part, and a safety plate opening / closing part rotatably coupled to the safety plate main body part and opening / closing a passage in response to the operation of an operating part, wherein the safety plate fixing part comprises a safety plate fixing member coupled to the safety plate main body part and positioned facing the safety guide bar, and a safety plate fixing bracket that combines the safety plate fixing member and the safety guide bar.

[0006] However, although the aforementioned conventional technology aims to prevent worker fall accidents that may occur while climbing up or down a ladder, the structure of the ladder device is relatively complex, which reduces constructability at the site; furthermore, it is difficult to flexibly modify the ladder design according to changes in the height of the structure at the site, making it difficult to respond immediately to various site conditions; and since sufficient space is not secured around the ladder for workers to move and work smoothly, it is subject to problems in effectively providing a high-altitude workspace for structural maintenance, etc. Prior art literature

[0008] (Patent Document 0001) KR 10-2025-0054775 A The problem to be solved

[0009] Accordingly, the present invention was conceived to solve the aforementioned problems, and aims to provide a safety ladder device that improves on-site constructability by allowing the length of the ladder section to be flexibly changed to match the height of the structure, secures sufficient workspace by providing a high-altitude space connected to the ladder section, and effectively prevents a user from falling through a safety cover, a safety door, and a non-powered moving module. means of solving the problem

[0011] To achieve this purpose, the present invention is characterized by comprising: a connecting member (10) installed longitudinally spaced apart along the wall surface of a structure (1) including a building; a ladder section (20) installed longitudinally along the wall surface of the structure (1) while connected to the connecting member (10), and having an arched handle section (21) at the top; a safety cover (30) installed in a tunnel shape to surround the ladder section (20); a safety door (40) provided to open and close the lower part of the safety cover (30); and a high-altitude space section (50) installed on the wall surface of the structure (1) to correspond to one side of the ladder section (20), and provided to provide a high-altitude space by communicating with the ladder section (20).

[0012] At this time, the above-mentioned high space (50) is characterized by including a support frame (51) mounted on the wall of the structure (1), a step (52) connected to the support frame (51) and extending laterally, a handrail (53) installed on the edge of the step (52), and an opening (54) that is opened on one side of the handrail (53) to communicate with the safety cover (30).

[0013] Additionally, the safety door (40) is characterized in that one end is connected to the safety cover (30) by a hinge (41), and the other end is provided with a lock (42) to be locked / unlocked with the safety cover (30).

[0014] Additionally, the ladder section (20) comprises a pair of vertical bars (22) and a horizontal bar (23) that has both ends connected to the vertical bars (22) and is spaced apart in the longitudinal direction of the vertical bars (22). The vertical bars (22) are formed by dividing them into multiple parts and are provided so as to be detachably connected by a joint section (25). The joint section (25) is characterized by comprising an outer tube (25b) formed at one end of the vertical bar (22) and having a first pin hole (25a) formed in the horizontal direction, an inner tube (25d) formed at the other end of the vertical bar (22) corresponding to the outer tube (25b) and having a second pin hole (25c) formed at a position corresponding to the first pin hole (25a), and a fastening pin (25e) inserted into the first and second pin holes (25a) (25c) to connect the inner tube (25d) to the outer tube (25b).

[0015] In addition, an upper loop (24a) is installed on the handle portion (21), and the upper loop (24a) is configured to allow a safety rope to be connected.

[0016] Additionally, the ladder section (20) comprises a main ladder module (20A) on which a safety cover (30) is installed, and an extension ladder module (20B) assembled below the main ladder module (20A) to extend the length of the ladder section downward, and is characterized in that the total length of the ladder section (20) can be modified by adjusting the number of assembly of one or more of the main ladder module (20A) and the extension ladder module (20B) in consideration of the height of the structure (1).

[0017] Additionally, the safety cover (30) is provided to move along with a user moving along the ladder section (20) by means of a non-powered moving module (60), and the non-powered moving module (60) is provided with a guide roller (61) installed on the upper and lower parts of the safety cover (30) and moving along the vertical bar (22), upper and lower sprockets (62) (63) installed on the upper and lower parts of the vertical bar (22), and a chain (64) to which the safety cover (30) is connected to the first straight section (64a), a counterweight (65) installed on the second straight section (64a) of the chain (64) and provided to offset the weight of the safety cover (30), and fixed to the vertical bar (22). The apparatus includes a roller stopper (66) that limits the downward movement range of a guide roller (61), a towing hook (67) that is installed on a safety cover (30) and is connected to a towing rope (R) connected to a user using a ladder section (20), a ratchet wheel (68) installed on the rotation axis of an upper sprocket (62), a pawl (69) that engages with the ratchet wheel (68) by an elastic body to allow forward rotational movement of the upper sprocket (62) due to upward movement of the safety cover (30) and to limit reverse rotational movement of the upper sprocket (62) due to downward movement of the safety cover (30), and a remote wire (70) that has one end connected to the pawl (69) and the other end connected to a lever (71) installed on the safety cover (30), and which separates the pawl (69) from the ratchet wheel (68) by operating the lever (71). After opening the safety door (40) and moving the user into the safety cover (30) by climbing the ladder section (20), closing the safety door (40) and climbing the ladder section (20) with the traction rope (R) attached to the traction hook (67), the safety cover (30) is allowed to move upward with the user.The safety cover (30) is stopped at the moment when a user falls and lands on the safety door (40) by the engagement of the ratchet wheel (68) and the pawl (69), thereby restricting the reverse rotational movement of the upper sprocket (62). When a worker climbs down the ladder section (20), pulling the lever (71) causes the pawl (69) to separate from the ratchet wheel (68) by the remote wire (70), thereby allowing the reverse rotational movement of the upper sprocket (62) and the downward movement of the safety cover (30). Effects of the invention

[0019] Based on the above configuration and operation, the present invention improves on-site constructability by allowing the length of the ladder section to be flexibly changed to match the height of the structure, secures sufficient workspace by providing a high-altitude space connected to the ladder section, and effectively prevents the user from falling through a safety cover, safety door, and non-powered moving module. Brief explanation of the drawing

[0021] FIG. 1 is a schematic diagram showing the overall configuration of a safety ladder device according to an embodiment of the present invention. FIG. 2 is a planar view showing a safety ladder device according to an embodiment of the present invention. FIG. 3 is a configuration diagram showing the high-altitude space portion of a safety ladder device according to an embodiment of the present invention. FIG. 4 is a configuration diagram showing the construction state of a safety ladder device according to an embodiment of the present invention. FIG. 5 is a configuration diagram showing the state in which a safety ladder device according to an embodiment of the present invention is installed on the front and side of a structure. FIG. 6 is a configuration diagram showing a divided state of a safety ladder device according to an embodiment of the present invention. FIGS. 7 and 8 are configuration diagrams showing a non-powered moving module of a safety ladder device according to an embodiment of the present invention. Specific details for implementing the invention

[0022] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Furthermore, in describing the present invention, detailed descriptions of related known functions are omitted if they are deemed obvious to those skilled in the art and could unnecessarily obscure the essence of the invention.

[0023] FIG. 1 is a configuration diagram showing the safety ladder device according to an embodiment of the present invention in its entirety, FIG. 2 is a configuration diagram showing the safety ladder device according to an embodiment of the present invention in a plan view, FIG. 3 is a configuration diagram showing the high-altitude space portion of the safety ladder device according to an embodiment of the present invention, FIG. 4 is a configuration diagram showing the construction state of the safety ladder device according to an embodiment of the present invention, FIG. 5 is a configuration diagram showing the state in which the safety ladder device according to an embodiment of the present invention is installed on the front and side of a structure, FIG. 6 is a configuration diagram showing the state in which the safety ladder device according to an embodiment of the present invention is divided and formed, and FIG. 7 to 8 are configuration diagrams showing the non-powered moving module of the safety ladder device according to an embodiment of the present invention.

[0024] The present invention relates to a safety ladder device, which has the main components including a connecting rod (10), a ladder section (20), a safety cover (30), a safety door (40), and a high-altitude space section (50), such that the length of the ladder section can be flexibly changed to match the height of the structure to improve on-site construction efficiency, a high-altitude space section connected to the ladder section to secure sufficient workspace, and a safety cover, a safety door, and a non-powered moving module to effectively prevent a user from falling.

[0025] The connecting member (10) according to the present invention is installed spaced apart in the longitudinal direction along the wall surface of a structure (1) including a building.

[0026] The above connecting member (10) serves to firmly fix the ladder part (20) to the wall of the structure (1).

[0027] In addition, the ladder section (20) according to the present invention is installed longitudinally along the wall surface of the structure (1) while connected to the connecting member (10), and serves as a passageway for a worker to move up and down.

[0028] The above ladder section (20) includes a pair of vertical bars (22) and horizontal bars (23) that are connected at both ends to the vertical bars (22) and spaced apart along the length of the vertical bars (22).

[0029] A handle portion (21) formed by bending downward in an arch shape is installed on the upper part of the vertical bar (22) so that a worker can stably hold and move it from the top of the ladder.

[0030] In addition, an upper loop (24a) is installed on the handle portion (21), and the upper loop (24a) is configured to allow a safety rope to be connected, and the safety rope is connected to the worker side to prevent a fall accident.

[0031] In addition, the vertical bar (22) is formed by dividing it into multiple parts and is provided so as to be detachable by a joint part (25).

[0032] In the enlarged view of FIG. 6, the joint portion (25) includes an outer tube (25b) formed at one end of a vertical bar (22) and having a first pin hole (25a) formed in the horizontal direction, an inner tube (25d) formed at the other end of a vertical bar (22) corresponding to the outer tube (25b) and having a second pin hole (25c) formed at a position corresponding to the first pin hole (25a), and a fastening pin (25e) inserted into the first and second pin holes (25a) (25c) to connect the inner tube (25d) to the outer tube (25b).

[0033] In this way, the vertical bar (22) parts are connected by inserting a connecting pin (25e) into the first and second pin holes (25a, 25c) to connect the inner tube (25d) to the outer tube (25b), and the detachable connection structure through the division and joint part (25) of the vertical bar (22) allows the ladder part (20) to be easily connected or separated in the longitudinal direction, thereby improving transport and on-site construction efficiency.

[0034] In FIG. 6, the ladder section (20) includes a main ladder module (20A) on which a safety cover (30) is installed, and an extension ladder module (20B) assembled at the bottom of the main ladder module (20A) to extend the length of the ladder section downward.

[0035] In addition, considering the height of the structure (1), the total length of the ladder section (20) can be designed to be changed by adjusting the number of assembly of one or more of the main ladder module (20A) and the extension ladder module (20B).

[0036] In this way, the split structure and modular configuration of the vertical bar (22) make it very convenient to adjust the length of the ladder section (20), allowing the ladder to be installed flexibly according to the height of the structure at the site, thereby improving on-site constructability and enabling design changes at the site by flexibly responding to the height of the structure.

[0037] In addition, the safety cover (30) according to the present invention is installed in a tunnel shape to surround the ladder part (20).

[0038] The above safety cover (30) performs the function of protecting the worker to prevent external exposure and to prevent the worker from falling.

[0039] In addition, the safety door (40) according to the present invention is provided to open and close the lower part of the safety cover (30).

[0040] One end of the safety door (40) is connected to the safety cover (30) by a hinge (41), and the other end is provided with a lock (42) to be locked / unlocked with the safety cover (30).

[0041] The above safety door (40) is configured to open the passage only when a worker uses the ladder section (20), thereby restricting unauthorized access and can be used as a safety device against falls.

[0042] In addition, the elevated space section (50) according to the present invention is installed on the wall of the structure (1) to correspond to one side of the ladder section (20) and is configured to provide an elevated space by communicating with the ladder section (20).

[0043] The above-mentioned high space section (50) is connected to the ladder section (20) to provide a high space to the worker.

[0044] In FIGS. 2 and 3, the elevated space (50) includes a support frame (51) mounted on the wall of the structure (1), a platform (52) connected to the support frame (51) and extending laterally, a handrail (53) installed on the edge of the platform (52), and an opening (54) that is opened on one side of the handrail (53) to communicate with the safety cover (30).

[0045] That is, an opening (54) is opened on one side of the handrail (53) to communicate with the safety cover (30), allowing a worker to move from the ladder section (20) inside the safety cover (30) to the elevated space section (50).

[0046] The configuration of this elevated space section (50) can solve the problem of insufficient elevated workspace by providing sufficient space around the ladder for a worker to move and work smoothly.

[0047] In FIGS. 7 and 8, the safety cover (30) is configured to move along with the user moving along the ladder section (20) by means of a non-powered moving module (60).

[0048] The above-mentioned non-powered moving module (60) comprises a guide roller (61) installed on the upper and lower parts of the safety cover (30) and moving along the vertical bar (22), upper and lower sprockets (62) (63) installed on the upper and lower parts of the vertical bar (22), a chain (64) installed to allow orbital movement via the upper and lower sprockets (62) (63) to form first and second straight sections (64a) (64b) and to which the safety cover (30) is connected to the first straight section (64a), a counterweight (65) installed on the second straight section (64a) of the chain (64) and provided to offset the weight of the safety cover (30), a roller stopper (66) fixed to the vertical bar (22) to limit the downward movement range of the guide roller (61), and a device installed on the safety cover (30) and connected to the user side using the ladder part (20). It includes a towing hook (67) provided to be connected to a towing rope (R), a ratchet wheel (68) installed on the rotation axis of an upper sprocket (62), a pawl (69) provided to engage with the ratchet wheel (68) by an elastic body to allow forward rotational movement of the upper sprocket (62) due to upward movement of the safety cover (30) and to restrict reverse rotational movement of the upper sprocket (62) due to downward movement of the safety cover (30), and a remote wire (70) having one end connected to the pawl (69) and the other end connected to a lever (71) installed on the safety cover (30), which retracts and moves the pawl (69) to separate it from the ratchet wheel (68) by operating the lever (71).

[0049] When looking at the operating state, the safety door (40) is opened, and after the user moves into the safety cover (30) by climbing the ladder section (20), the safety door (40) is closed, and the user climbs up the ladder section (20) with the towing rope (R) connected to the towing hook (67), the safety cover (30) is allowed to move upward together with the user.

[0050] Then, at the moment the user falls and lands on the safety door (40), the safety cover (30) stops operating in a state where the reverse rotational movement of the upper sprocket (62) is restricted by the engagement of the ratchet wheel (68) and the pawl (69). As a result, the safety cover (30) stops moving downward and remains in a stopped state, and the user lands on the safety door (40) below the safety cover (30), effectively preventing a fall accident.

[0051] Meanwhile, when a worker is going down the ladder section (20), pulling the lever (71) separates the pawl (69) from the ratchet wheel (68) by the remote wire (70), thereby allowing reverse rotational movement of the upper sprocket (62) and downward movement of the safety cover (30).

[0052] That is, when the above-mentioned pawl (69) is separated from the ratchet wheel (68), reverse rotational movement of the upper sprocket (62) is allowed, enabling the safety cover (30) to move downward, and the worker can safely climb down the ladder. The automatic stop and manual release functions of this non-powered moving module (60) can effectively prevent fall accidents that may occur during the user's up-and-down movement.

[0053] As described above, the detailed description of the present invention has explained the most preferred embodiment of the present invention, but various modifications are possible within the scope of the technical scope of the present invention. Accordingly, the scope of protection of the present invention should not be limited to the above embodiment, but should be recognized to include the technologies of the claims described below and equivalent technical means derived from these technologies. Explanation of the symbols

[0055] 10: Connecting rod 20: Ladder part 30: Safety cover 40: Safety door 50: High-altitude space section 60: Non-powered moving module

Claims

Claim 1 A connecting member (10) installed longitudinally spaced along the wall of a structure (1) including a building; a ladder section (20) installed longitudinally along the wall of the structure (1) while connected to the connecting member (10), and having an arched handle section (21) at the top; a safety cover (30) installed in a tunnel shape to surround the ladder section (20); and a safety door (40) provided to open and close the lower part of the safety cover (30). and a high-altitude space section (50) is installed on the wall of the structure (1) to correspond to one side of the ladder section (20) and is provided to provide a high-altitude space by communicating with the ladder section (20); the safety cover (30) is provided to move along with a user moving on the ladder section (20) by a non-powered moving module (60); the non-powered moving module (60) includes a guide roller (61) installed on the upper and lower parts of the safety cover (30) and moving along a vertical bar (22), upper and lower sprockets (62) (63) installed on the upper and lower parts of the vertical bar (22), a chain (64) installed to move along the upper and lower sprockets (62) (63) to form first and second straight sections (64a) (64b), and the safety cover (30) is connected to the first straight section (64a); and the chain (64) A counterweight (65) installed in a straight section (64a) and configured to offset the weight of the safety cover (30), a roller stopper (66) fixed to a vertical bar (22) to limit the downward movement range of the guide roller (61), a towing hook (67) installed on the safety cover (30) and configured to be connected to a towing rope (R) connected to the user side using the ladder section (20), a ratchet wheel (68) installed on the rotation axis of the upper sprocket (62), a pawl (69) configured to engage with the ratchet wheel (68) by an elongation transfer force acting by an elastic body, allowing the forward rotational movement of the upper sprocket (62) due to the upward movement of the safety cover (30) and limiting the reverse rotational movement of the upper sprocket (62) due to the downward movement of the safety cover (30), and a pawl having one end connected to the pawl (69) and the other end installed on the safety cover (30). It is connected to the lever (71),It includes a remote wire (70) that retracts and moves the pawl (69) by operating a lever (71) to separate it from the ratchet wheel (68), and after the safety door (40) is opened and the user moves into the safety cover (30) by riding the ladder section (20), the safety door (40) is closed and the user climbs the ladder section (20) with the traction rope (R) connected to the traction hook (67), the safety cover (30) is allowed to move upward together with the user, and at the moment the user falls and lands on the safety door (40), the safety cover (30) stops operating in a state where the reverse rotational movement of the upper sprocket (62) is restricted by the engagement of the ratchet wheel (68) and the pawl (69), and when the worker climbs down the ladder section (20), if the lever (71) is pulled, the pawl (69) is separated from the ratchet wheel (68) by the remote wire (70) and the upper A safety ladder device characterized by being configured to allow reverse rotational movement of the sprocket (62) and downward movement of the safety cover (30). Claim 2 A safety ladder device according to claim 1, wherein the above-described high space section (50) comprises a support frame (51) mounted on the wall of a structure (1), a step (52) connected to the support frame (51) and extending laterally, a handrail (53) installed on the edge of the step (52), and an opening (54) opened on one side of the handrail (53) to communicate with a safety cover (30). Claim 3 A safety ladder device according to claim 1, wherein one end of the safety door (40) is connected to the safety cover (30) by a hinge (41), and the other end is provided with a lock (42) to be locked / unlocked with the safety cover (30). Claim 4 In claim 1, the ladder portion (20) comprises a pair of vertical bars (22) and a horizontal bar (23) having both ends connected to the vertical bars (22) and spaced apart in the longitudinal direction of the vertical bars (22); the vertical bars (22) are formed by dividing them into multiple parts and are provided to be detachably connected by a joint portion (25); the joint portion (25) comprises an outer tube (25b) formed at one end of the vertical bar (22) and having a first pin hole (25a) formed in the horizontal direction, an inner tube (25d) formed at the other end of the vertical bar (22) corresponding to the outer tube (25b) and having a second pin hole (25c) formed at a position corresponding to the first pin hole (25a), and a fastening pin (25e) inserted into the first and second pin holes (25a) (25c) to connect the inner tube (25d) to the outer tube (25b). A safety ladder device characterized by the following. Claim 5 A safety ladder device according to claim 1, characterized in that an upper loop (24a) is installed on the handle portion (21), and the upper loop (24a) is configured to connect a safety rope. Claim 6 A safety ladder device according to claim 1, wherein the ladder section (20) comprises a main ladder module (20A) on which a safety cover (30) is installed, and an extension ladder module (20B) assembled below the main ladder module (20A) to extend the length of the ladder section downward, and wherein the total length of the ladder section (20) can be designed to be changed by adjusting the number of assembly of one or more of the main ladder module (20A) and the extension ladder module (20B) in consideration of the height of the structure (1). Claim 7 delete

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