Climbing ladder for climbing over entry prevention fence and its installation method

Abstract

To provide a lightweight, easy-to-carry climbing ladder for climbing over an entry prevention fence and its installation method.SOLUTION: A climbing ladder 2 for climbing over an entry prevention fence 1 is equipped with a suspension ladder 3 and a handrail 4. The suspension ladder includes body-edge hooks 31, steel cables 32, and parallel-cross treads 33. The body-edge hooks are in the shape of an inverted U and are hooked across an upper body-edge 111 of the entry prevention fence. The parallel-cross treads are suspended by the steel cables connected to lower ends of both sides of the body-edge hooks. The handrail includes a climbing handrail 41 and a post section 42. The climbing handrail has a body-edge hooking metal fitting 411 corresponding to a member of the upper body-edge of the entry prevention fence. A lower end of the post section has a fixing jig for connecting and fixing to a lower body-edge 112 of the entry prevention fence. Also provided is an installation method therefor.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a ladder for climbing over an anti-intrusion fence, which is lightweight and easy to carry by separating the ladder and handrail. [Background technology]

[0002] It is necessary to climb over an access prevention fence for inspection work or maintenance and cleaning work. When climbing over an access prevention fence by hooking the toes over the wire mesh of the fence, there is a risk that the toes will come off and cause an accident. For this reason, several products that attach scaffolding to the access prevention fence are sold. However, these products do not have anything to support the body when climbing over the access prevention fence, so there is an issue that it is not possible to climb over the access prevention fence safely.

[0003] Patent Document 1 describes a portable fence scaffolding that has a step 3 with an anti-slip channel 6 attached to a post 1 with a detachable hook 2 attached to a wire mesh fence used as an intrusion prevention barrier, and a slide arm 4 attached to the post 1 and the step 3, and that enables people to safely climb over the fence without using a stepladder.

[0004] Patent Document 2 describes an emergency ladder in which, as shown in Figure 2, a hanging cord is passed through a small hole at the end of retaining bracket 1, which is a metal fitting for holding the entire ladder by hooking it onto the rung or crosspiece of a window, and shelves 3 to 6 are fixed at equal distances, with the sides of each shelf being fitted together, and which can be combined to form a continuous ladder rung by removing each shelf.

[0005] Patent Document 3 describes a rescue ladder structure in which a rope attachment part 8 is protruding into a container 7 in which a ladder installed inside a window or on a rooftop can be placed, one end of a wire rope 3 of a length sufficient to hang down outward beyond the periphery of the container 7 is attached to the rope attachment part 8, and the other end of each wire rope is connected to a link 1 which is connected to two corners on both sides of the top step of a ladder consisting of a link 1 and a step 2, and the link 1 is made of a metal rod a having both ends bc bent into a ring shape, staggered with each other, and each end wrapped around the center of the metal rod a, and the both ends bc bent into a ring shape of the link 4 are clamped by bifurcated parts installed at the four corners of the step 2 to firmly hold the step 2 to the chain 1 at a certain interval.

[0006] Patent Document 4 describes an escape ladder which comprises a number of horizontal bars 1 arranged in the vertical direction, foldable vertical members 2 connecting both ends of adjacent horizontal bars 1 above and below, rod-shaped protrusions 3 attached to each horizontal bar 1, and a hanging bracket 4 attached to the topmost horizontal bar 1, and which when not in use is in a folded state in which the horizontal bars abut each other, and when in use, the hanging bracket 4 is hung on a window frame or the like of a building and in an extended hanging state along the building wall W, in which a convex portion 1a is formed on one of the opposing faces of adjacent horizontal bars 1 above and below, along the longitudinal direction of the horizontal bar 1, and a concave portion 1b which fits into the convex portion 1a is formed on the other face. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Registered Utility Model Publication No. 3060018 [Patent Document 2] Actual No. 47-4222 [Patent Document 3] Jikko No. 16285-1975 [Patent Document 4] Patent Publication No. 7-238760 Summary of the Invention [Problem to be solved by the invention]

[0008] Conventionally, the invention described in Patent Document 1 is a portable scaffold for climbing over a fence of an intrusion prevention fence, and is described as being small and lightweight, and easy to carry by folding. However, the step 3 is one step, and the support 1 only reaches the top end of the fence. Therefore, for a high fence, many step boards 3 are required, which increases the weight, making it large and heavy. In addition, there is no handrail to support the body when climbing over, which is a safety problem. The invention described in Patent Document 2 is an emergency ladder that is hooked onto the window ledge or crosspiece to hold the entire ladder, and is an emergency ladder / hanging shelf that can be used as furniture by connecting shelves in daily life. Therefore, it is difficult to carry the emergency ladder / hanging shelf, and there is no handrail when climbing over. The invention described in Patent Document 3 is a rescue ladder in which one end of a wire rope 3 is attached to a rope attachment part 8 provided on the inside of a window or on a rooftop, and further a chain 1 is hung to support the four corners of the step 2, and which does not cause a decrease in strength, especially in the event of a fire. Therefore, it is heavy and difficult to carry, and there is no handrail when climbing over. The invention described in Patent Document 4 is a foldable evacuation ladder made of aluminum square pipes, equipped with hanging brackets 4, foldable vertical members 2, and multiple horizontal bars 1, but it is difficult to carry and has no handrails for climbing over.

[0009] The present invention has been made in consideration of the above problems. It is an object of the present invention to provide a ladder for climbing over an intrusion prevention fence, which is equipped with a handrail for climbing over, and which is lightweight and easy to carry by separating the ladder from the handrail, and to provide a method for installing the ladder. [Means for solving the problem]

[0010] The invention of claim 1 of the present application is a climbing ladder for climbing over an intrusion prevention fence, which comprises a suspension ladder and a handrail, and the suspension ladder is composed of a furring strip hook, a steel rope, and a rhombus tread, the furring strip hook is in an inverted U-shape and is hung across the upper furring strip of the intrusion prevention fence, and the rhombus tread is suspended by the steel rope connected to the lower ends of both sides of the inverted U-shape, the handrail comprises a climbing handrail and a support section connected to the climbing handrail, the climbing handrail has a furring strip hanging fitting corresponding to a member of the upper furring strip, and the lower end of the support section has a fixing jig that connects and fixes it to the lower furring strip of the intrusion prevention fence.

[0011] The invention according to claim 2 of the present application is characterized in that the tread plate is made up of a pair of rod-shaped vertical beams and a pair of vertical beams that are parallel to each other. Intersection The ladder described in claim 1 is characterized in that it is composed of a pair of rod-shaped cross beams connected together, and both ends of the vertical beams have steel rope holes for connecting to the steel rope.

[0012] The invention according to claim 3 of the present application is characterized in that the support portion includes a pair of vertical members and a vertical member and a support member perpendicular to the vertical members. Intersection The climbing ladder as described in claim 1 is characterized in that it is composed of an upper horizontal member and a lower horizontal member connected in a straight line, the lower horizontal member having the fixing jig, and the fixing jig being composed of a lower furring strip fixing chain and a chain hook.

[0013] The invention according to claim 4 of the present application is the climbing ladder as described in claim 1, characterized in that the furring strip hanging fittings are composed of a steel pipe type hanging fitting and a angle iron type hanging fitting.

[0014] The invention of claim 5 of the present application is a method for installing a climbing ladder as described in claim 1, characterized in that it comprises at least the steps of: hanging the furring strip hook across the upper furring strip of the intrusion prevention fence; connecting the steel rope to one end of the furring strip hook and suspending and deploying the lattice step; connecting the steel rope to the other end of the furring strip hook and holding the lattice step in a tied state; fixing the furring strip hanging fitting of the climbing handrail to correspond to the upper furring strip member of the intrusion prevention fence; connecting and fixing the lower furring strip and the support part of the intrusion prevention fence with the fixing jig; and using the climbing handrail to release the tie-down of the lattice step and deploy it. Effect of the Invention

[0015] According to the present invention, the climbing ladder for climbing over the intrusion prevention fence is equipped with a hanging ladder and a handrail, and can be used to climb over safely. The hanging ladder is composed of a steel cable and a lattice board, and is lightweight and easy to carry. By disposing an inverted U-shaped furring strip hook on the upper furring strip of the intrusion prevention fence, the hanging ladder can be easily installed on the lower ends of both sides of the furring strip hook, which are the inside and outside of the intrusion prevention fence. Furthermore, the climbing handrail has a furring strip hook fastener corresponding to the member of the upper furring strip of the intrusion prevention fence, and can be installed on the upper furring strip of the intrusion prevention fence in any region of Japan. Furthermore, the handrail is securely connected and fixed to the lower furring strip of the intrusion prevention fence by the fixing jig of the support part.

[0016] In addition, the crossbeam tread has vertical and horizontal beams and is connected to steel ropes through steel rope holes at both ends of the vertical beams, making it lightweight and easy to carry.

[0017] In addition, the lower end of the support section has a fixing jig consisting of a lower furring strip fixing chain and a chain hook, and the support section can be easily connected and fixed by passing one end of the lower furring strip fixing chain from the top to the bottom of the lower furring strip and hooking it onto the chain hook.

[0018] In addition, the furring strip hanging fittings consist of a steel pipe type hanging fitting and an angle iron type hanging fitting that are suited to regional characteristics, making them applicable throughout the country.

[0019] In addition, the climbing ladder can be safely and easily installed inside and outside the access prevention fence by hanging and extending one of the cross-shaped steps, holding the other cross-shaped steps in a tied-down state, and using the climbing handrail to release the ties on the other cross-shaped steps and extend them. [Brief description of the drawings]

[0020]

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Figure 2

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Figure 7

[0021] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. It goes without saying that the present invention is not limited to the embodiments described below. In addition, the materials, shapes, and dimensions of each member described below are examples, and changes are subject to design considerations.

[0022] <Coordinate axis> The drawings show X-axis, Y-axis, and Z-axis as coordinate axes. The X-axis indicates the direction of the lane of the road, The Y-axis is from the main line to the side road, and the Z-axis is perpendicular to the road surface.

[0023] <Definition> Up and down: With respect to the axis (Z-axis direction) that is perpendicular to the road surface, the side opposite the road surface (positive Z-axis direction) is considered "up" and the side toward the road surface (negative Z-axis direction) is considered "down."

[0024] <Outline of the ladder for climbing over the anti-intrusion fence> FIG. 1 is a schematic diagram of a climbing ladder 2 according to a first embodiment of the present invention installed on an intrusion prevention fence 1 (angle iron type), (a) being a front view and (b) being a side view. The climbing ladder 2 is composed of a pair of hanging ladders 3·3 and a handrail 4. The pair of hanging ladders 3·3 are hung and deployed on the main line side 15 and the siding side 16 of the intrusion prevention fence 1 via a furring hook 31 on the upper furring strip 111 of the intrusion prevention fence 1. Furthermore, handrails 4 are installed on both sides of the hanging ladder 3 in the lane direction. Therefore, when climbing up and climbing over the intrusion prevention fence 1 using the hanging ladder 3 by using the handrail 4, it is possible to safely climb over from the main line side 15 to the siding side 16 by using the handrail 4 that extends above the intrusion prevention fence 1. Note that in the first embodiment, the climbing ladder 2 is installed from the main line side 15 to climb over the siding side 16, but the reverse case is similar.

[0025] <Hanging ladder> 2 is a diagram of a suspension ladder 3 according to a second embodiment of the present invention. The suspension ladder 3 is composed of a furring hook 31, a steel cable 32 (wire rope), and a lattice step 33. (a) is a front view, (b) is a side view, and (c) is a plan view.

[0026] For example, the furring hooks 31·31 are in an inverted U-shape and are installed in pairs in the lane direction (X-axis direction) on the upper furring strips 111 of the intrusion prevention fence 1, spaced apart by the width (X-axis direction) of the steel cables 32·32 of the suspension ladder 3. The suspension ladders 3·3 are suspended from the lower ends on both sides (Y-axis direction) of the inverted U-shape on the main line side 15 and the side road side 16. The upper furring strips 111 of the intrusion prevention fence 1 are of two types, an angle iron type (L40×40mm) and a steel pipe type (φ76.8mm), depending on regional characteristics (see Figures 6 and 7). For this reason, the furring hooks 31 are stably hung across both types of upper furring strips 111, forming an inverted U-shape. The furring hook 31 is made of aluminum plate material and has an inverted U-shape with an inner radius of r=39mm, an outer radius of r=59mm, a height of H=99mm, and a thickness of t=5mm, so that it can stably support angle iron and steel pipe types at the inside upper part. The inverted U-shape has holes 31a (φ8mm) for steel cables at the lower ends on both sides, and steel cables 32 are connected to the holes 31a for steel cables via fasteners 31b (for example, carabiners).

[0027] As an example, a SUS stainless steel wire rope of φ3 mm (W7-3) is used for the steel rope 32. As an example, a suspended ladder 3 is formed by supporting four parallel lattice steps 33 at both ends (the four corners of the parallel lattice step 33) of a pair of vertical beams 332, 332 that make up the parallel lattice step 33 with washers 332b and fasteners 332c. Suspending the four corners of the parallel lattice step 33 ensures stable support. See FIG. 3.

[0028] The suspension ladder 3, which is suspended by a pair of steel ropes 32·32 from steel rope holes 31a·31a at the bottom end of one side of the inverted U-shape of a pair of furring hooks 31·31, has, for example, four cross-shaped steps 33. For example, the spacing between the cross-shaped steps 33·33·33·33 is L1=250mm directly below the furring hooks 31·31, and L2, 3, 4=300mm for the other three steps. The installation height of the lowest cross-shaped step 33 from the ground is H=194mm. Therefore, the suspension ladder 3 can be used to easily climb up and down the intrusion prevention fence with a height of H=1500mm.

[0029] FIG. 3 is a detailed view of the lattice step 33 according to the third embodiment of the present invention, where (a) is a plan view, (b) is a front view, and (c) is a side view. The lattice step 33 is, as an example, made of aluminum square tubes measuring 20×20×2 mm, assembled in a lattice shape with cross beams 331 (20×20×300 mm) and vertical beams 332 (20×20×200 mm). Two cross beams 331 are arranged in the lane direction (X-axis direction) at a distance of 100 mm from the center position of the vertical beam 332. Two vertical beams 332 are arranged in the direction perpendicular to the lane (Y-axis direction) with an outer distance of 300 mm. The cross beam 331 is arranged perpendicular to the vertical beam 332, Intersection As an example, the intersections of the horizontal members 331 and vertical beams 332 are welded together. The vertical beams 332 have steel cable holes 332a (φ4 mm) at both ends, and a pair of vertical beams 332 form steel cable holes 332a at the four corners. By using the lattice treads 33 as the steps, it is possible to stably support a person's feet, and the structure is lightweight (400 g / lattice tread).

[0030] The suspension ladder 3 can be easily installed on both the main line side 15 and the side road side 16 by arranging the furring strip hooks 31 on the upper furring strips 111 of the intrusion prevention fence 1. In addition, the suspension ladder 3 is composed of steel ropes 32 and square treads 33, so it is lightweight and can be folded and tied together for easy transport, and can be easily unfolded by releasing the tie-down.

[0031] <Handrails> FIG. 4 shows a handrail 4 according to a fourth embodiment of the present invention, where (a) is a perspective view and (b) is a side view. The handrail 4 is composed of a pair of handrails 41 and a support part 42 connected to the pair of handrails 41. The lower part of the handrail 41 has a furring strip hanging bracket 411 that can be fixed to the upper furring strip 111 of the intrusion prevention fence 1. The handrail 41 is formed of a rectangular aluminum shaped material having a cross section of 30×40×2 mm and a length of 1200 mm, for example. The handrail 41 extends upward from the furring strip hanging bracket 411 fixed to the upper furring strip 111 of the intrusion prevention fence 1. Therefore, by using the handrail 41, the intrusion prevention fence 1 can be climbed over safely.

[0032] As an example, the furring strip hanging fitting 411 is composed of a steel pipe type hanging fitting 411a, which is a plate-like member protruding from one side (Y-axis positive side) of the crossing handrail 41, and an angle iron type hanging fitting 411b, which is a plate-like member protruding from the other side (Y-axis negative side). The steel pipe type hanging fitting 411a is used for the upper furring strip 111 of the steel pipe type, and the angle iron type hanging fitting 411b is used for the upper furring strip 111 of the angle iron type. The lower side of the steel pipe type hanging fitting 411a has a semicircular (R=38mm) notch corresponding to the upper half of the steel pipe (φ76.8mm). Furthermore, the lower side of the angle iron type hanging fitting 411b has a rectangular (45×20mm) notch corresponding to the upper half of the angle iron (L=40×40mm).

[0033] The lower part of the handrail 41 and the upper part of the support part 42 are connected by a connecting part 43, which is, for example, a nested structure. At this time, the direction of the furring strip hanging fitting 411 at the lower part of the handrail 41 is selected so that it corresponds to the upper furring strip 111, and the height is adjusted and fixed by, for example, three connecting holes and connecting jigs 431 such as bolts and nuts. Then, the lower end of the support part 42 of the handrail 41 is connected and fixed to the intrusion prevention fence 1. See Figures 4(a) and (b).

[0034] FIG. 5 is a diagram showing a support part 42 of a handrail 4 according to a fifth embodiment of the present invention, in which (a) is a front view, (b) is a plan view, (c) is a side view, and (d) is a detailed view of a fixing jig. The support part 42 is made up of a pair of vertical members 420 and a vertical member 420 and a fixing jig. IntersectionThe vertical member 420 is provided with an upper horizontal member 421 and a lower horizontal member 422 connected to each other. As an example, the vertical member 420 is formed of a rectangular aluminum shaped member having a cross section of 30×40×2 mm and a length of 1250 mm. The upper horizontal member 421 is disposed approximately near the center of the support section 42, and the lower horizontal member 422 is disposed at the lower end of the support section 42. The lower horizontal member 422 has a fixing jig that connects to the lower furring strip 112 of the intrusion prevention fence 1 to connect and fix the support section 42. As an example, the fixing jig is composed of a lower furring strip fixing chain 422a (SUS chain, 2.5-A) and a chain hook 422b. One end of the lower furring strip fixing chain 422a is fixed to the upper surface near the center of the lower horizontal member 422 by a bolt. A chain hook 422b is fixed to the side surface near the center of the lower horizontal member 422 with the hook opening facing up.

[0035] When connecting and fixing the lower horizontal member 422 of the support part 42 to the lower furring strip 112 of the intrusion prevention fence 1, the support part 42 can be easily connected and fixed by simply passing the other end of the lower furring strip fixing chain 422a from the top to the bottom of the lower furring strip 112 and hooking it onto the chain hook 422b.

[0036] <How to install a ladder> A method for installing a climbing ladder 2 on an intrusion prevention fence 1 according to a sixth embodiment of the present invention is as follows: (a) a step of hanging the furring strip hook 31 across the upper furring strip 111 of the intrusion prevention fence 1; (b) A process of connecting a steel rope 32 to one end of the furring hook 31 and suspending and deploying the lattice tread 33; (c) a process of connecting a steel rope 32 to the other end of the furring hook 31 and holding the lattice tread 33 in a tied state; (d) A process of fixing the furring strip hanging fittings 411 of the handrail 41 to correspond to the upper furring strips 111 of the intrusion prevention fence 1; (e) a process of connecting and fixing the lower furring strip 112 and the support post 42 of the intrusion prevention fence 1 with a fixing jig; (f) using the handrail 41 to release and unfold the lattice steps 33; At least one of the following is provided:

[0037] As an example of the preparation process, two suspension ladders 3 and handrails 4 are prepared on the main line side. The two suspension ladders 3 are transported with the lattice steps 33 bound together. The handrail 4 is transported with the crossing handrail 41 and the support post 42 separated. The method of installing the crossing ladder from the side road side is also the same process.

[0038] (a) The process of hanging the furring strip hook 31 across the upper furring strip 111 of the intrusion prevention fence 1. The furring strip hooks 31·31 are installed in pair from the main line side in the X-axis direction of the upper furring strip 111 of the intrusion prevention fence 1, spaced apart by the width of the steel cables 32·32 of the suspension ladder 3 (L=180mm). The upper furring strip 111 of the intrusion prevention fence 1 comes in two types, an angle iron type (L40×40mm) and a steel pipe type (φ76.8mm), depending on regional characteristics, but the furring strip hook 31 can be installed stably across both types. In Example 6, the upper furring strip 111 of the intrusion prevention fence 1 is an angle iron type.

[0039] (b) A process of connecting a steel rope 32 to one end of the furring hook 31 and suspending and deploying a lattice step 33. A pair of steel ropes 32·32 are connected to the steel rope holes 31a·31a at the lower end of one side of the inverted U-shape of the pair of furring hooks 31·31 on the main line side via fasteners 31b·31b. Then, as an example, four lattice steps 33 are suspended and deployed, completing the installation of the climbing ladder 2 on the main line side 15.

[0040] (c) A process of connecting a steel rope 32 to the other end of the furring strip hook 31 and holding the lattice steps 33 in a bound state. A pair of steel ropes 32·32 are connected from the main line side 15 to the steel rope holes 31a·31a at the lower end of one side of the inverted U-shaped side road side 16 of the pair of furring strip hooks 31·31 via fasteners 31b·31b. Then, as an example, four lattice steps 33 are held in a bound state, completing the temporary installation of the climbing ladder 2 on the side road side 16.

[0041] The crossing handrail 41 and the support pillar 42 are temporarily connected to the connecting part 43 using a connecting jig 431. Then, the handrail 4 is assembled and installed on both sides of the suspension ladder 3 installed on the main line side 15.

[0042] (d) A process of fixing the furring strip hanging fittings of the handrail 41 to correspond to the upper furring strip members of the intrusion prevention fence. For the furring strip hanging fittings 411 of one of the handrails 41 installed on both sides of the hanging ladder 3, an angle iron type hanging fitting 411b is selected to correspond to the upper furring strip members 111 of the intrusion prevention fence 1 (angle iron type), and the height is adjusted and fixed using the connecting jig 431 of the connecting part 43 between the handrail 41 and the post 42. The same is true for the furring strip hanging fittings 411 of the other handrail 41.

[0043] (e) A process of connecting and fixing the lower furring strip 112 and the support post 42 of the intrusion prevention fence 1 with a fixing jig. The free end of the lower furring strip fixing chain 422a is passed from the top to the bottom of the lower furring strip 112 and hooked onto the chain hook 422b to connect and fix them.

[0044] (f) A process of releasing and unfolding the lattice steps using the handrail 41. Using the handrail 41, the suspension ladder 3 is climbed from the main line side 15, and the lattice steps 33 on the side road side 16 are released and unfolded.

[0045] The climbing ladder 2 is deployed by hanging the lattice step 33 on one end of the furring strip hook 31 on the main line side 15, and is held in a state in which the lattice step 33 is tied to the other end of the furring strip hook 31 on the side road side 16. The climbing ladder can be safely and easily set up by using the climbing handrail 41 installed from the main line side 15 to release the tie-down of the lattice step 33 and deploying it.

[0046] Figures 6 and 7 are assembly diagrams of the intrusion prevention fence 1. The intrusion prevention fence 1 is composed of furring strips (L = 1500 mm from the ground to the top end of the upper furring strip) arranged on the top and bottom in the lane direction (X-axis direction) supported by posts installed at regular intervals (L = 1500 to 2000 mm), and a diamond-shaped wire mesh and rib wire are stretched over the furring strips. In snowy areas, the steel pipe type (φ76.8 mm) shown in Figure 6 is used for the upper furring strips, taking into account the snow load, and in other areas the angle iron type (L40 x 40 mm) shown in Figure 7 is used.

[0047] <Other Examples> The intrusion prevention fence 1 includes a barbed wire section above the upper furring strip 111 (not shown). In this case, a suspension ladder support for supporting the suspension ladder 3 is provided on the handrails 41 of the ladder 2 above the barbed wire section. The suspension ladder support includes a handrail connector and a support section. The handrail connector connects the handrails 41 on both sides in the X-axis direction. A pair of support sections are provided at both ends of the handrail connector, which are perpendicular to the handrail connector and extend in the Y-axis direction to the main line side 15 and the side road side 16 of the intrusion prevention fence 1. The lower ends of both ends of the support section located on the main line side 15 and the side road side 16 have steel rope holes (φ8 mm), and steel ropes are connected to the steel rope holes via fasteners (for example, carabiners). Then, the suspension ladder 3 conforming to the structural format of the second embodiment is installed. By disposing the suspension ladder support at a position above the barbed wire section, the suspension ladder 3 can be easily arranged on the main line side 15 and the side road side 16 of the intrusion prevention fence 1, and the intrusion prevention fence 1 with the barbed wire section can be safely climbed over. [Explanation of symbols]

[0048] 1. Entry prevention fence 11. Fuselage 11a steel pipe 11b angle iron 111 Upper furring strip 112 Lower furring strip 12 pillars 13 Wire Mesh 15 Main Line Side 16 Side road side 2. Climbing ladder 3. Hanging ladder 31 Beam hook 31a Steel cable hole 31b Clamp 32 Wire rope 32a Hook and eye for furring strip 33 Igeta Stepping Board 331 Crossbeam 332 Stringer 332a Steel cable hole 332b Washer 332c Fastening hardware 4. Handrails 41 Handrail 411 Frame hanging fittings 411a Steel pipe type hanging bracket 411b Angle iron type hanging bracket 42 Pillar section 420 Vertical Member 421 Upper horizontal material 422 Lower horizontal material 422a Lower furring strip fixing chain (fixing jig) 422b Chain hook (fixing jig) 43 Connecting part 431 Connection jig

Claims

1. A climbing ladder for climbing over an access prevention fence, The climbing ladder includes a hanging ladder and a handrail, The suspension ladder is composed of a furring hook, a steel rope, and a lattice step, The furring strip hook has an inverted U-shape and is hung across the upper furring strip of the intrusion prevention fence, The tread plate is suspended by the steel rope connected to the lower ends of both sides of the inverted U-shape, The handrail includes a crossing handrail and a support portion connected to the crossing handrail, The handrail has a furring strip hanging fitting corresponding to the upper furring strip member, This climbing ladder is characterized in that the lower end of the support portion has a fixing jig that connects and fixes it to the lower side furring strip of the intrusion prevention fence.

2. The tread plate is composed of a pair of rod-shaped vertical beams and a pair of rod-shaped horizontal beams connected perpendicularly to the vertical beams, 2. The ladder according to claim 1, wherein the vertical beam has holes for connecting the steel ropes at both ends.

3. The support portion is composed of a pair of vertical members, and an upper horizontal member and a lower horizontal member connected perpendicular to the vertical members, A ladder as described in claim 1, characterized in that the lower horizontal member has a fixing jig, and the fixing jig is composed of a lower furring strip fixing chain and a chain hook.

4. 2. The ladder according to claim 1, wherein the furring strip hanging fittings are composed of a steel pipe type hanging fitting and an angle iron type hanging fitting.

5. A method for installing the ladder according to claim 1, comprising the steps of: A step of hanging the furring strip hook across the upper furring strip of the intrusion prevention fence; A step of connecting the steel rope to one end of the furring strip hook and suspending and deploying the lattice tread; A step of connecting the steel rope to the other end of the furring strip hook and holding the lattice tread in a bound state; A step of fixing the furring strip hanging fitting of the climbing handrail to correspond to the upper furring strip member of the intrusion prevention fence; A step of connecting and fixing the lower furring strip and the support portion of the intrusion prevention fence with the fixing jig; A method for installing a ladder comprising at least a step of releasing and unfolding the lattice steps using the handrail.

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