Roof fall prevention type ladder apparatus having auxiliary crossbar

Abstract

The roof fall prevention ladder device (1) of the present invention is composed of a safety rope block (50) having a safety wire (53) connected to a worker who has climbed onto the roof (201) through a fall prevention part (40), and a lower fixing part (30) that is connected to the roof (201) of a building (200) by a rotating structure and is attached to the roof (201) of a building (200) from top to bottom, thereby having the feature of preventing fall accidents caused by roof collapse when working on the roof (201) of a building (200) such as a livestock barn where it is difficult to use an aerial work vehicle.

Description

Technology Field

[0001] The present invention relates to a roof fall prevention ladder device equipped with an auxiliary crossbar, and more specifically, to a method for installing a roof fall prevention ladder device capable of preventing fall accidents during work in locations where it is difficult to use an aerial work vehicle. Background Technology

[0002] Generally, aerial work platforms are used for power transmission and distribution line work at sites accessible by vehicle; however, when working in locations where vehicle access is difficult, such as livestock sheds or house roofs, ladders are used to climb up before proceeding with the work.

[0003] Such ladder-climbing work is prevented by specifying measures to prevent danger during work on the roof through Article 45 (Prevention of Danger on the Roof) of the Rules on Industrial Safety and Health Standards.

[0004] However, due to the conditions at the power distribution site, it is impossible to take measures as instructed by the law, such as “installing safety railings to prevent falls from the roof or installing work platforms at least 30 cm wide on the roof,” so there is a problem of continuous fall accidents occurring while working on the roof or climbing ladders for work.

[0005] Moreover, there are no fall prevention devices to prevent the roof from collapsing while moving from the roof of a barn or similar structure to the work site.

[0006] For example, there is a problem in that accidents such as falling 3 meters down when a slate roof breaks while checking the site by climbing onto a roof to adjust the ground clearance of the service line, falling after slipping on a ladder while climbing a utility pole because a repair vehicle cannot enter, and falling after slipping on a skylight while moving on the roof to check the location of a fault due to a power outage in a livestock barn. Prior art literature

[0007] Korean Utility Model KR 20-2015-0000036 (January 5, 2015) The problem to be solved

[0008] Accordingly, the present invention, taking into account the above points, aims to provide a roof fall prevention ladder device and a method for installing the same, which can prevent fall accidents caused by roof collapse when working on livestock barn roofs where it is difficult to use a high-altitude work vehicle by utilizing a fall prevention safety wire together with a double-fixed ring structure. means of solving the problem

[0009] The roof fall prevention ladder device of the present invention for achieving the above purpose is characterized by comprising a double-fixed ladder consisting of an upper fixing part that presses down on the roof of a building from above, a lower fixing part that is coupled to the upper fixing part by a rotating structure and hangs from below to above the roof, a fall prevention part that is coupled to the upper fixing part by a fixed structure and is located below the lower fixing part, and a safety rope block that is coupled to the fall prevention part and has a safety wire connected to a worker who has climbed onto the roof.

[0010] In a preferred embodiment, the upper fixing part is formed with a first upper fixing part and a second upper fixing part forming a width of a predetermined interval between an upper frame and a lower frame, the lower fixing part is coupled to the upper frame, and the fall prevention part is coupled to the lower frame.

[0011] In a preferred embodiment, the lower fixing part is coupled to the upper frame in a rotating structure, and the rotating structure forms a unidirectional restraint so that the lower fixing part can rotate in only one direction for 360° rotation, and is implemented by a ring release device installed on the lower fixing part coupled to the upper frame.

[0012] In a preferred embodiment, the ring release device is configured such that a rocker, which moves downward upon pressing a push button, unlocks a rotating gear coupled with a lower fixing part using the upper frame as a rotation axis, and comprises a push button attached to the side of the lower fixing part, the rocker which moves downward upon pressing the push button and is unlocked, a return spring that provides a restoring force to the push button, and a rotating gear coupled with the upper frame as a rotation axis and coupled to and separated from the rocker.

[0013] In a preferred embodiment, the rocker forms a locking portion, and the locking portion engages with or separates from a gear or tooth formed on the outer diameter of the rotating gear.

[0014] In a preferred embodiment, the safety rope block is detachably mounted on the fall prevention part and acts to secure the rope without unraveling when tension is applied to the wound safety wire.

[0015] In addition, the roof fall prevention ladder device of the present invention for achieving the above purpose is characterized by including a work ladder installed on the roof of a building, a double-fixing ladder that is fixed to the roof while assembled on the work ladder, a connecting bracket that combines the double-fixing ladder with the work ladder, and a fixing pin that fixes the ladder outrigger of the work ladder to the ground.

[0016] In a preferred embodiment, the double-fixing ladder is coupled to an upper ladder that is drawn out from the lower ladder of the work ladder, and forms a width of a predetermined interval between the upper frame and the lower frame, and comprises a pair of first upper fixing members and second upper fixing members that press the roof from top to bottom, a lower fixing member positioned between the first upper fixing member and the second upper fixing member with the upper frame as a rotation axis and hooked from bottom to top of the roof, a locker that moves downward upon pressing a push button unlocks a rotating gear coupled with the lower fixing member with the upper frame as a rotation axis and a ring release device that limits the rotation direction of the lower fixing member to one direction in the locked state, a fall prevention member provided on the first upper fixing member and the second upper fixing member respectively on the lower frame side, and a safety rope block coupled to the fall prevention member and having a safety wire connected to a worker who has climbed onto the roof.

[0017] In a preferred embodiment, the ring release device comprises the push button attached to the side of the lower fixing part, the locker which is lowered and unlocked by pressing the push button, a return spring that provides a restoring force to the push button, and the rotating gear which is coupled with the upper frame as a rotation axis and has a gear or tooth formed on its outer diameter to engage and disengage from the locking end of the locker.

[0018] In a preferred embodiment, the connecting bracket is detachably mounted on the horizontal frame of the upper ladder, and the fixing pin secures the ladder outrigger of the lower ladder to the ground.

[0019] The method for installing a roof fall prevention ladder device according to the present invention for achieving the above-mentioned purpose comprises the steps of: moving a work ladder to the roof of a building, adjusting the length of the work ladder to match the height of the roof, and then assembling a double-fixed ladder to an upper ladder drawn out from the lower ladder of the work ladder using a connecting bracket; while the upper fixing part and the lower fixing part of the double-fixed ladder are in contact with the roof, the work ladder is pressed down so that the upper fixing part of the double-fixed ladder is fixed on the roof, and then the lower fixing part of the double-fixed ladder is rotated to move and fixed below the eaves of the roof; and, while the ladder outrigger of the work ladder is spread out toward the ground, driving a fixing pin into the ground and then fixing the ladder outrigger to the ground, thereby completing the ladder installation.

[0020] In a preferred embodiment, before the double-fixed ladder is assembled to a work ladder, a step is performed in which a safety rope block equipped with a safety wire is connected through a fall prevention part located in an upper fixing part that presses the roof of the building from top to bottom. Effects of the invention

[0021] The ladder device installed according to the present invention for preventing roof falls enables the elimination of the probability of safety accidents by preventing falls during roof and ladder work. It functions as a safety device that protects workers by preventing falls while climbing a ladder and by shielding them from falling due to the collapse of aging skylights or roofs while moving on the roof. In particular, given that it is practically impossible to install fall-prevention railings or passageways on the roofs of livestock barns or detached houses when working, this device provides the effect of resolving the legal liability of business owners that may arise from non-compliance with regulations. Brief explanation of the drawing

[0022] FIG. 1 is a configuration diagram of a roof fall prevention type ladder device according to the present invention, FIG. 2 is a configuration diagram of an upper / lower fixing part of a double-fixing type ladder and a safety rope block coupled to the ladder among the roof fall prevention type ladder device according to the present invention, FIG. 3 is a configuration diagram of a bracket coupled to a work ladder and a ladder outrigger that fixes the ladder to the ground among the roof fall prevention type ladder device according to the present invention, and FIG. 4 to 6 are flowcharts of an installation method of a roof fall prevention type ladder device according to the present invention. Specific details for implementing the invention

[0023] Embodiments of the present invention will be described in detail below with reference to the attached illustrative drawings. Since these embodiments are merely examples and can be implemented in various different forms by those skilled in the art to which the present invention pertains, the embodiments described herein are not limited to the examples described herein.

[0024] Referring to FIG. 1, the roof fall prevention ladder device (1) consists of a double-fixed ladder (10) and a work ladder (100).

[0025] Specifically, the above-mentioned double-fixed ladder (10) is composed of an upper fixing part (20), a lower fixing part (30), a fall prevention part (40), a safety rope block (50), a connecting bracket (60), and a fixing pin (70).

[0026] For example, the upper fixing part (20) serves to press down on the roof (201) (see FIG. 4) of the building (200) from above, and the lower fixing part (30) serves to prevent the double fixing ladder (10) from lifting up in the event of a fall by hanging the roof (201) (see FIG. 4) of the building (200) downwards, and the fall prevention part (40) serves to attach / detach the safety rope block (50), and the lower fixing part (30) and the fall prevention part (40) are formed as an integrated structure with the upper fixing part (20) as a frame.

[0027] In particular, the left / right latch structure of the upper fixing part (20) and the latch structure of the lower fixing part (30) each have an auxiliary crossbar installed horizontally on each of the left / right latches to increase the contact area at the end of the latches that contact the roof.

[0028] To this end, the upper fixing part (20) is formed as a frame structure with two semicircular latch structures that form a predetermined width gap, the lower fixing part (30) is formed as a semicircular latch structure and is connected between the left and right latch structure frames at the upper part of the upper fixing part (20), and the fall prevention part (40) is connected to the left and right latch structure frames at the lower part of the upper fixing part (20).

[0029] In particular, the lower fixing part (30) is a 360° rotatable coupling structure to fix a ladder at the bottom of the roof, but is applied as a structure that can only rotate in one direction (e.g., clockwise).

[0030] For example, the above safety rope block (50) is positioned between the fall prevention members (40) respectively attached to the left and right latch structure frames and is detachable from / attached to the fall prevention members (40), and serves to ensure safety that can protect the worker in the event of a fall from a ladder or a fall from a roof.

[0031] For example, the above connecting bracket (60) is removed from the work double-fixing ladder (10) when not in use and stored, and when used, is assembled to the upper ladder (102) of the work ladder (100) and combined with the double-fixing ladder (10), thereby serving to connect the safety rope of the safety rope block (50) together with the double-fixing type hook of the upper / lower fixing part (20, 30) at the end of the work ladder (100) and the double-fixing ladder (10).

[0032] For example, the above fixing pin (70) is installed to completely fix the ladder outrigger (103) of the work ladder (100) to the ground.

[0033] Specifically, the above-mentioned work ladder (100) is configured as a straight ladder consisting of an upper ladder (102) that is pulled out from a lower ladder (101), and the lower ladder (101) is equipped with a ladder outrigger (103) in which a fixing pin (70) is installed to reinforce the fixing force to the ground. In this case, the above-mentioned work ladder (100) is exemplified as a straight ladder, but an A-type ladder can also be used.

[0034] Meanwhile, FIGS. 2 and 3 illustrate the detailed configuration of the upper fixing part (20), lower fixing part (30), fall prevention part (40), safety rope block (50), connecting bracket (60), and fixing pin (70).

[0035] Referring to the upper fixing part (20) of FIG. 2, the upper fixing part (20) is formed with two semicircular latch structures, a first upper fixing part (21) and a second upper fixing part (22), and a frame structure that separates the first and second upper fixing parts (21, 22) by a predetermined width is formed with an upper frame (23) and a lower frame (24).

[0036] In particular, the upper and lower frames (23, 24) are connected / supported by two vertical bars spaced apart from each other, thereby serving to maintain rigidity against the weight of the worker.

[0037] To this end, the upper frame (23) is configured with a circular cross-sectional structure that acts as a rotation axis, thereby allowing a circular hole to pass through the rotating ring (31) of the lower fixing part (30), the rotating gear (38) of the ring release device (33), and the upper part of the vertical bar, while the lower frame (24) is formed with a square cross-sectional structure to strengthen the fixing force of the lower part of the vertical bar. In this case, the lower frame (24) and the lower part of the vertical bar may be connected by a welded fixing or a snap-fit ​​joint structure.

[0038] And the lower fixing part (30) is composed of a rotating ring (31) and a ring release device (33), and the rotating ring (31) is formed with a semicircular latch structure and is coupled so as to be 360° rotatable to be positioned under the roof using the upper frame (23) of the upper / lower frame (23, 24) of the upper fixing part (20) as a rotation axis, and the ring release device (33) forms a reverse lock so that the rotating ring (31) cannot be rotated in the reverse direction while positioned under the roof, thereby making the 360° rotatable coupling structure into a structure that can only be rotated in one direction (e.g., clockwise).

[0039] Specifically, the above ring release device (33) is composed of a push button (35) attached to the side of a rotating ring (31) so as to be positioned on one side of the lower fixing part (30), a locker (36) that is lowered and unlocked by pressing the push button (35), a return spring (37) that is elastically supported by the side of the locker (36) and the rotating ring (31) and provides a push button force when the push button (35) is released, and a rotating gear (38) that is fixed to the side of the rotating ring (31) and coupled with the upper frame (23) of the upper fixing part (20) as a rotation axis.

[0040] In particular, the above-mentioned locker (36) has a “L”-shaped end bending structure formed as a locking member (36a), and when the end bending structure of the locking member (36a) is caught between the gear or teeth formed on the outer diameter of the rotating gear (38), it restrains the rotating ring (31) to block the rotation of the lower fixing member (30), and on the other hand, when moving downward by pressing a button, when the end bending structure of the locking member (36a) is disengaged from the gear or teeth of the rotating gear (38), it releases the restraint on the rotating ring (31) to enable the rotation of the lower fixing member (30).

[0041] For example, the above return spring (37) uses a coil spring.

[0042] Additionally, the above fall prevention part (40) is composed of a first fall prevention part coupled to a first upper fixing part (21) forming an upper fixing part (20) and a second fall prevention part coupled to a second upper fixing part (22), and in each of the first and second fall prevention parts (40), a protruding shaft (41) into which an shaft hole (55) formed in the impact detection locking body (51) of the safety rope block (50) is fitted is formed to protrude horizontally and face each other.

[0043] Referring to the safety rope block (50) in FIG. 2, the safety rope block (50) is composed of a cylindrical impact-sensing locking body (51) and a safety wire (53).

[0044] For example, the shock-sensing locking body (51) has circular plates formed on both the left and right sides with a diameter larger than the diameter of the circular body, and the shaft hole (55) penetrating the circular body is fitted into the protruding shaft (41) of the fall prevention part (40), thereby allowing the safety wire (53) to be smoothly unwound and wound.

[0045] In particular, an impact-sensing brake that secures the end of the safety wire (53) is built into the interior of the impact-sensing locking body (51), thereby serving to keep the rope from coming loose and to secure it when tension is applied to the safety wire (53).

[0046] For example, the above safety wire (53) is wound around an impact-sensing locking body (51), and a hook (53a) is attached to its end so that it can be hung on a safety hook provided on a worker's safety belt.

[0047] Therefore, the above safety rope block (50) is mounted on the double-locking ladder (10) through a connection between the shaft hole (55) of the impact-sensing locking body (51) and the protruding shaft (41) of the fall prevention part (40), and the worker is tied with the hook (53a) of the safety wire (53), so that when an impact is detected due to a worker falling, the rope is fixed without coming loose, thereby enabling the prevention of accidents caused by a worker falling.

[0048] Referring to the connecting bracket (60) in Fig. 3, the connecting bracket (60) is composed of a double-fixed ladder mounting body (61) made of a rigid rectangular plate structure and a ladder fixing part (63) that forms the four corner portions of the double-fixed ladder mounting body (61).

[0049] In particular, the above-mentioned double-fixed ladder mounting body (61) is formed with a “C”-shaped cross-sectional structure and is fixed by being inserted into the lower frame (24) of the double-fixed ladder (10) while being inserted into the horizontal frame forming the upper ladder (102) of the work ladder (100), but a bending structure (not shown) is further formed at the end of the “C”-shaped cross-sectional structure so that it is hooked onto the lower frame (24) to form a stronger fixing force.

[0050] In addition, the above-mentioned overlapping fixed ladder mounting body (61) has a plurality of mounting holes (61a) drilled therein, and the mounting holes (61a) can be used to attach / detach the connecting bracket (60) to the ladder by holding it with a finger, to attach a ladder fastening clamp, or to insert and hang the safety wire (53) of the safety rope block (50).

[0051] And the above ladder fixing part (63) is formed with a cross-sectional structure into which a horizontal frame forming the upper ladder (102) of the work ladder (100) is fitted.

[0052] Referring to the fixing pin (70) in Fig. 3, the fixing pin (70) is formed in a “C” shape with a pointed end, and a handle (71) is formed on the upper part of the body so that it is easy for a worker to hold with their hand.

[0053] Therefore, when using the fixing pin (70), the worker can completely fix the ladder outrigger (103) of the work ladder (100) to the ground by holding the handle (71) and pressing the “U”-shaped body against the ground.

[0054] Meanwhile, FIGS. 4 to 6 illustrate the installation procedure of the roof fall prevention ladder device (1). In this case, the work ladder (100) can be applied in the same way to an A-type ladder, which is described as an example applied to a livestock barn (200) using a straight ladder.

[0055] As described above, the installation procedure for the roof fall prevention ladder device consists of the assembly steps of the work ladder and the double-fixed ladder as shown in Fig. 4 (①, ②, ③, ④), the roof fixing step of the double-fixed ladder as shown in Fig. 5 (⑤, ⑥, ⑦, ⑧-1, ⑧-2), and the ground fixing step of the work ladder as shown in Fig. 6 (⑨, ⑩, ⑪).

[0056] Referring to FIG. 4, the assembly of the work ladder and the double-fixed ladder (①, ②, ③, ④) is performed in the following steps: arriving at the site (①); moving the work ladder (100) to the building (200) (②); adjusting the length of the upper ladder (102) from the lower ladder (101) of the work ladder (100) to match the roof height of the roof (201) of the building (200) (③); and combining the double-fixed ladder (10) and its accessories to the upper ladder (102) of the work ladder (100) (④).

[0057] From this, the work ladder (100) is moved to the roof (201) of the building (200) (①) (②), and the length of the work ladder (100) is adjusted (③) to match the height of the roof (201). Then, the overlapping ladder (10) is assembled (④) to the upper ladder (102) that is pulled out from the lower ladder (101) of the work ladder (100) using a connecting bracket (60).

[0058] In particular, before the above-mentioned double-fixed ladder (10) is assembled to the work ladder (100), a safety rope block (50) equipped with a safety wire (53) is combined through a fall prevention part (40) located in an upper fixing part (20) that presses the roof (201) of the building (200) from top to bottom.

[0059] Referring to FIG. 5, the double-fixed ladder roof fixing (⑤, ⑥, ⑦, ⑧-1, ⑧-2) is performed by the following steps: contact step (⑤) between the double-fixed ladder (10) and the roof (201); operation step (⑥) of the work ladder (100); rotation step (⑦) in which the lower fixing part (20) of the double-fixed ladder (10) is rotated while the upper fixing part (20) of the double-fixed ladder (10) is fixed to the upper part of the roof (201); and fixing step (⑧-1, ⑧-2) in which the lower fixing part (20) of the double-fixed ladder (10) is fixed to the underside of the roof (201) at the eaves side of the roof (201).

[0060] From this point, when the upper fixing part (20) and the lower fixing part (30) of the double fixing ladder (10) are in contact (⑤) with the roof (201), the work ladder (100) is pressed down so that the upper fixing part (20) of the double fixing ladder (10) is fixed (⑥) on the roof (201), and the lower fixing part (30) of the double fixing ladder (10) is rotated (⑦) and moved to the underside of the eaves of the roof (201) and fixed (⑧-1, ⑧-2).

[0061] Referring to FIG. 6, the ground fixing (⑨, ⑩, ⑪) of the work ladder is performed in the following steps: ground fixing step (⑨) of the work ladder (100), ground driving step of the fixing pin (⑩), and ladder installation completion step (⑪).

[0062] From this point, with the ladder outrigger (103) of the work ladder (100) spread out to the ground (⑨), the fixing pin (70) is driven into the ground (⑩), and the ladder installation is completed (⑪) by fixing the ladder outrigger (103) to the ground.

[0063] As described above, the roof fall prevention ladder device (1) according to the present embodiment is composed of a safety rope block (50) having a safety wire (53) connected to a worker who has climbed onto the roof (201) through a fall prevention part (40), together with an upper fixing part (20) that presses down on the roof (201) of a building (200) from above and a lower fixing part (30) that is connected by a rotating structure and hangs from below the roof upward, thereby making it possible to prevent fall accidents caused by roof collapse when working on the roof (201) of a building (200) such as a livestock barn where it is difficult to use an aerial work vehicle. Explanation of the symbols

[0064] 1 : Ladder device 10: Overlapping fixed ladder 20: Upper fixing part 21,22: 1st and 2nd upper fixing parts 23,24 : Top / Bottom Frames 30: Lower fixing part 31: Rotating ring 33: Ring release device 35 : Push button 36 : Locker 36a : catch 37 : Return spring 38 : Rotating gear 40: Fall prevention unit 41: Protrusion axis 50: Safety rope block 51: Shock-sensing locking body 53: Safety wire 53a : Hook 55 : Axis hole 60 : Connecting bracket 61: Overlapping fixed ladder mounting body 61a: Mounting hole 63: Ladder fixing part 70 : Fixing pin 71 : Handle 100 : Work ladder 101 : Bottom ladder 102 : Top ladder 103 : Ladder Outrigger 200 : Building 201 : Roof

Claims

Claim 1 A roof fall prevention type equipped with an auxiliary crossbar, comprising: an upper fixing part that presses the roof of a building from top to bottom; a lower fixing part that is connected to the upper fixing part by a rotating structure and hangs from bottom to top of the roof; a fall prevention part that is connected to the upper fixing part by a fixed structure and is located below the lower fixing part; a safety rope block that is connected to the fall prevention part and has a safety wire connected to a worker who has climbed onto the roof; and a connecting bracket that connects the upper fixing ladder to an upper ladder drawn out from the lower ladder of a work ladder and connects the safety wire, wherein the upper fixing part is formed by a first upper fixing part and a second upper fixing part that form a width of a predetermined interval between an upper frame and a lower frame, the lower fixing part is connected to the upper frame, and the fall prevention part is connected to the lower frame, and the left and right latches of the upper fixing part and the latches of the lower fixing part are each characterized by having an auxiliary crossbar installed in a horizontal structure at the roof contact end to increase the contact area. ladder device.

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