A special climbing ladder and its manufacturing method

Abstract

The present invention provides a special climbing ladder and a manufacturing method thereof, a hard ladder section, a plurality of the hard ladder sections are connected end to end through a connecting assembly; the hard ladder section comprises an integrally connected main ladder section and a climbing ladder, the main ladder section and the hard ladder section are both filled with light foam; the climbing ladder is alternately and equidistantly arranged on two opposite sides of the main ladder section; a soft ladder section, the soft ladder section is arranged at the bottom end of the hard ladder section located at the tail section; a hook, the hook is arranged at the top end of the hard ladder section located at the head section. The special climbing ladder described in the present invention is light in weight and high in structural strength, and is adapted to the needs of water operations.

Description

Technical Field

[0001] The invention belongs to the field of special engineering ladders, and in particular relates to a special climbing ladder and a manufacturing method thereof. Background Art

[0002] Hard climbing ladders are mainly used by special operations team members when working on the water. They use special climbing ladders to climb onto ships or facilities on the sea from the water or in the water. Special operations team members will carry heavier combat equipment when performing special operations missions. The weight requirements for hard climbing ladders are relatively strict. If the overall weight of the hard climbing ladder is too high, it will be difficult for special operations personnel to carry it and it will also be difficult to carry out corresponding special operations.

[0003] At the same time, due to the complexity of actual combat situations, the length requirements for hard climbing ladders vary greatly according to actual work. If the overall length of the hard climbing ladder is too long, special operations team members will not be able to place the hard climbing ladder at the designated location in the first time, which will delay the opportunity. If the overall length of the special climbing ladder is too short, it will be difficult to reach the designated height in the first time to perform special operations.

[0004] In view of this, it is urgent to propose a special climbing ladder with light weight and high structural strength. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to provide a special climbing ladder with light weight and high structural strength and a manufacturing method thereof.

[0006] The special climbing ladder provided by the present invention comprises:

[0007] A hard staircase, wherein a plurality of the hard staircases are connected end to end by a connecting assembly; the hard staircase comprises a main staircase and a climbing ladder connected in one piece, wherein both the main staircase and the hard staircase are filled with light foam; the climbing ladder is alternately and equidistantly arranged on two opposite sides of the main staircase;

[0008] A soft stair section, the soft stair section being arranged at the bottom end of the hard stair section at the tail section;

[0009] A hook is arranged at the top of the hard ladder section at the first section.

[0010] Furthermore, the connecting component includes plug-in grooves and plug-in bosses respectively arranged at the two ends of the hard stair sections, and the adjacent hard stair sections are connected by plugging and matching the plug-in grooves and the plug-in bosses; a quick latch is provided at the connection between the plug-in boss and the plug-in groove, which is suitable for fixing two adjacent hard stair sections.

[0011] Furthermore, a pull ring is provided at one end of the quick bolt, and a chain fixed to the main ladder section is provided at the pull ring of the quick bolt, and the other end of the quick bolt is conical and provided with a plug-in limiting structure.

[0012] Furthermore, the climbing ladder includes a climbing section and a supporting section, and the climbing section, the supporting section and the main stair section of the climbing ladder together form a triangular structure; the climbing section of the climbing ladder is inclined, and the angle between it and the main stair section is 85°-90°.

[0013] Furthermore, a place-taking boss suitable for stacking the hard ladder sections is provided on one side of the connection between the climbing section and the supporting section.

[0014] Further, the hook includes:

[0015] A hook body, the hook body is made of a carbon fiber tube, and includes a vertical section and a bending section connected in one piece;

[0016] A hook tip portion, the hook tip portion is arranged at the end of the bending section, and comprises a hook cap and a connector suitable for plugging the hook cap, the connector is integrally connected to the bending section;

[0017] A hook tail portion, the hook tail portion is arranged at the vertical section of the hook body, and comprises an embedded section arranged in the hook body and a connecting section suitable for connecting with the hook connecting member;

[0018] Furthermore, it also includes a hook connector, and the hook connector includes:

[0019] A connecting sleeve, which is a cylindrical sleeve with one end sealed, suitable for connecting with the plug-in boss of the main stair section; and a pin hole suitable for plugging with the quick plug is provided through the wall of the connecting sleeve;

[0020] Ear plates, a pair of which are integrally connected to the sealing end of the connecting sleeve along the vertical direction;

[0021] A fixing bolt, wherein the fixing bolt is detachably disposed between the pair of lug plates;

[0022] A supporting boss is arranged on the side wall of the connecting sleeve.

[0023] Furthermore, it also includes supporting feet, wherein there are two supporting feet, and the two supporting feet are symmetrically arranged on both sides of the main stair section along the width direction, and are symmetrically arranged in a V shape.

[0024] Furthermore, a foot pad is provided at the end of the support leg away from the main stair section, the cross-sectional area of ​​the foot pad is larger than the cross-sectional area of ​​the support leg, and the distance between the surface side of the end of the foot pad and the main stair section is greater than 80 mm.

[0025] The present invention also provides a method for manufacturing a special climbing ladder, comprising the following steps:

[0026] S1, making a lightweight foam mold for a hard stair step, and sequentially attaching a carbon fiber composite layer and a carbon fiber impact-resistant layer to the outer side of the lightweight foam mold.

[0027] S2: drilling holes at both ends of the hard step and installing titanium alloy metal bushings in the holes;

[0028] S3: making a lightweight foam mold of the hook body, and sequentially pasting a carbon fiber composite layer and a carbon fiber impact-resistant layer on the outer side of the lightweight foam mold;

[0029] S4: pre-embedding a titanium alloy connector at the end of the hook body in step S3 using a pre-embedding process;

[0030] S5: using a mold to make the hook cap and the hook connector, and respectively installing the hook cap and the hook cap connector at two ends of the hook main ladder in step S4;

[0031] S6: Connect the multiple rigid ladder sections described in step S1 end to end, and connect the hook connector described in step S5 to the rigid ladder sections.

[0032] The above technical solution of the present invention has the following advantages compared with the prior art:

[0033] (1) The special climbing ladder described in the present invention comprises a plurality of hard ladder sections, and adjacent hard ladder sections are combined together by connecting components so as to adjust the overall length of the special climbing ladder according to actual work requirements.

[0034] (2) In the special climbing ladder described in the present invention, a foot pad is provided at the end of the support foot away from the main stair section. Since the cross-sectional area of ​​the foot pad is larger than the cross-sectional area of ​​the support foot, the foot pad effectively increases the contact area between the present invention and the wall or the hull during actual use, thereby increasing the stability of this embodiment during use, and the distance between the end surface of the foot pad and the main stair section is greater than 80 mm. During actual use, the distance between the main stair section and the wall or the hull is ensured to be greater than 80 mm, so that the staff will not be hindered when climbing. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0036] Figure 2 is an isometric schematic diagram of a hard stair section according to an embodiment of the present invention;

[0037] Figure 3is an isometric schematic diagram of a hard stair section according to an embodiment of the present invention along another direction;

[0038] Figure 4 yes Figure 3 The enlarged schematic diagram of point A in the middle;

[0039] Figure 5 is a schematic structural diagram of a quick latch according to an embodiment of the present invention;

[0040] Figure 6 is along Figure 5 Schematic cross-sectional view of the middle BB line;

[0041] Figure 7 yes Figure 6 The enlarged schematic diagram of the center C;

[0042] Figure 8 is a schematic structural diagram of a hook according to an embodiment of the present invention;

[0043] Fig. 9 is an exploded schematic diagram of a hook according to an embodiment of the present invention;

[0044] Fig.10 is a rear view schematic diagram of the hook of the present embodiment of the invention;

[0045] Fig.11 is along Fig.10 Schematic cross-sectional view of the middle DD line;

[0046] Fig.12 yes Fig.11 The enlarged schematic diagram of point E in the middle;

[0047] Fig.13 is a cross-sectional view of a hard stair section according to an embodiment of the present invention;

[0048] Fig.14 is a schematic diagram of stacking and placing hard stair sections according to an embodiment of the present invention;

[0049] Fig.15 It is a buoyancy calculation table of an embodiment of the present invention.

[0050] Among them, 1. hard ladder section; 2. hook; 3. soft ladder section; 11. main ladder section; 12. climbing ladder; 13. support foot; 21. hook body; 22. hook tip; 23. hook tail; 24. hook connector; 111. plug-in groove; 112. plug-in boss; 113. quick latch; 114. stacking boss; 115. stacking groove; 116. plug-in pin hole; 117. titanium ring; 118. lightweight foam; 121. climbing ladder Climbing section; 122, supporting section; 123, placeholder boss; 131, foot pad; 221, connector; 222, hook cap; 223, cylindrical pin; 224, wing boss; 231, embedding section; 232, connecting section; 233, cavity; 241, ear plate; 242, fixing bolt; 243, connecting sleeve; 244, supporting boss; 245, connecting pin hole; 1131, pull ring; 1132, ball clamp column; 1133, spring. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] The special climbing ladder described in this embodiment is as follows Figure 1-2 As shown, including:

[0053] A hard stair section 1, wherein a plurality of the hard stair sections 1 are connected end to end via a connecting assembly; the hard stair section 1 comprises a main stair section 11 and a climbing ladder 12 which are connected in one piece, wherein both the main stair section 11 and the hard stair section 1 are filled with light foam; the climbing ladder 12 is alternately and equidistantly arranged on two opposite sides of the main stair section 11; in this embodiment, the number of the hard stair sections 1 is six, and the six hard stair sections 1 are connected end to end;

[0054] For achieving the purpose of the present invention, the number of the hard stair sections 1 is not unique, and the specific data can be adjusted according to actual needs.

[0055] A soft stair section 3, the soft stair section 3 is arranged at the bottom end of the hard stair section 1 at the tail section;

[0056] A hook 2 is provided at the top of the hard ladder section 1 at the first section.

[0057] like Fig.13 As shown, the main stair segment 11 and the climbing step 12 in this embodiment are both made of carbon fiber tubes, and the interior of the tubes is filled with lightweight foam 118 .

[0058] The soft ladder section 3 in this embodiment is a rope ladder, and the top ends of both sides of the soft ladder section 3 are connected to the bottom end of the hard ladder section through metal buckles (not shown in the figure).

[0059] As a further preferred embodiment of this embodiment, Figure 2 and Figure 3 As shown, the connection assembly includes a plug-in groove 111 and a plug-in boss 112 respectively arranged at both ends of the hard ladder section 1, and the adjacent hard ladder sections 1 are connected by plugging and matching the plug-in groove 111 with the plug-in boss 112; a quick latch 113 (such as Figure 5 As shown in FIG. 1 ), the stacking boss 114 and the stacking groove 115 form a corresponding plug pin hole 116 at the plugging position of the quick plug pin 113, which is suitable for fixing two adjacent hard ladder sections 1.

[0060] In order to increase the durability of this embodiment after multiple disassembly and assembly, Figure 4 As shown, a titanium ring 117 is provided in the plug pin hole 116. The titanium ring 117 has good wear resistance. After the quick plug pin 113 is plugged and pulled out multiple times, the titanium ring 117 can still maintain its structural integrity, thereby increasing the durability of this embodiment.

[0061] As a further preferred embodiment of this embodiment, Figure 5 As shown, a pull ring 1131 is provided at one end of the quick latch 113, and a chain (not shown in the figure) fixed to the main ladder section 11 is provided at the pull ring 1131 of the quick latch 113, and the other end of the quick latch 113 is conical and provided with a plug-in limit structure.

[0062] In this implementation, if Figure 6 and Figure 7 As shown, the plug-in limiting structure includes a ball clamping column 1132 and a spring 1133 arranged at the end of the ball clamping column 1132. One end of the ball clamping column 1132 is hemispherical, and the other end is slidably arranged inside the quick latch 113, and moves inside the quick latch 113 through the spring 1133. Through the spring 1133, when the quick latch 113 is inserted into the plug pin hole 116, the ball clamping column 1132 moves toward the inside of the quick latch 113. After the quick latch 113 is fully positioned, the ball clamping column 1132 is no longer squeezed by the inner wall of the plug pin hole 116. At this time, it is reset under the action of the spring 1133 to achieve the limiting and fixing effects.

[0063] As a further preferred embodiment of this embodiment, Figure 2 and Figure 3As shown, the climbing ladder includes a climbing section 121 and a supporting section 122. The climbing section 121, the supporting section 122 of the climbing ladder and the main stair section 11 together form a triangular structure; the climbing section 121 of the climbing ladder is inclined, and the angle between it and the main stair section 11 is 86.5°, so as to prevent the feet of special forces members from slipping from the side of the climbing ladder 12 during the climbing process, thereby improving the safety of use of this embodiment. It is worth noting that the angle between the climbing ladder 12 and the main ladder pipe is not limited to 86.5°, and the specific angle can be any value between 80° and 90°.

[0064] In order to increase the ergonomic performance of the present embodiment, the spacing between the climbing steps 12 in the hard climbing ladder on the same side is 265 mm; the length of the climbing section 121 of the climbing steps 12 is 110 mm; it is worth noting that the spacing between the climbing steps 12 is not limited to 265 mm, it can be any value between 150 mm and 350 mm, and the length of the climbing section 121 is not limited to 110 mm, it can be any value between 50 mm and 150 mm.

[0065] In order to increase the safety of this embodiment when in use, an anti-skid granular rubber layer (not shown in the figure) is provided on the outer side of the climbing section 121 of the climbing ladder 12. The actual use environment of this embodiment is in a humid environment such as a water surface, and the climbing ladder 12 will be relatively humid. The anti-skid granular rubber layer has a large friction coefficient and has a good anti-skid effect even in a humid environment. It can increase the friction coefficient when the sole of the worker contacts the climbing ladder 12 when stepping on the climbing ladder 12, thereby playing an anti-skid role and increasing safety.

[0066] As a further preferred embodiment of this embodiment, Figure 2 and Figure 3 As shown, a placeholder boss 123 suitable for stacking the hard stair segments 1 is provided on one side of the connection between the climbing segment 121 and the supporting segment 122. When each hard stair segment 1 is disassembled and needs to be stacked and stored, multiple hard stair segments 1 are stacked on the ground in a vertical direction. Between two adjacent hard stair segments 1, the placeholder boss 123 of one of the hard stair segments 1 will abut against the main stair segment 11 of the other hard stair segment 1 to make the stacking more stable.

[0067] In order to further increase the stability of the stacking of this embodiment, as Figure 2 and Figure 3As shown, the two opposite sides of the main ladder tube that are perpendicular to the climbing step 12 are respectively provided with a stacking boss 114 and a stacking groove 115. The stacking boss 114 and the stacking groove 115 are engaged with each other when multiple hard ladder sections 1 are stacked in the vertical direction to increase the stability of the hard ladder sections 1 when they are stacked and stored. In the present embodiment, the stacking boss 114 is in a truncated cone shape to facilitate the positioning and insertion of the stacking boss 114 into the stacking groove 115.

[0068] like Fig.14 As shown, the stacking protrusions 114 and the stacking grooves 115 are matched along the dotted line position in the figure to achieve the stacking and stacking of this embodiment.

[0069] As a further preferred embodiment of this embodiment, Figure 8 and Fig. 9 As shown, the hook 2 in this embodiment includes:

[0070] The hook body 21 is made of a carbon fiber tube, and includes a vertical section and a bending section that are integrally connected. The hook body 21 made of carbon fiber is light in weight and suitable for use on water;

[0071] A hook tip 22, the hook tip 22 is arranged at the end of the bending section, and comprises a hook cap 222 and a connector 221 suitable for plugging the hook cap 222, the connector 221 is integrally connected to the bending section;

[0072] The hook tail 23, such as Fig.11 As shown, the hook tail portion 23 is arranged on the vertical section of the hook body 21 , and includes an embedded section 231 arranged in the hook body 21 and a connecting section 232 suitable for connecting with the hook connector 24 .

[0073] In order to further increase the stability of the connection between the hook cap 222 and the connector 221 in this embodiment, side wing bosses 224 are provided on the opposite sides of the connector 221, and side wing grooves (not shown in the figure) suitable for the insertion of the side wing bosses 224 are provided on both sides of the hook cap 222, and the hook cap 222 and the connector 221 are connected and fixed by a cylindrical pin 223.

[0074] In order to further reduce the overall weight of the hook 2 in this embodiment, Fig.11 and Fig.12 As shown, a cavity 233 is provided inside the embedding section 231 of the hook 2, which reduces its weight while meeting the basic strength requirements.

[0075] In order to ensure the overall structural strength of the hook 2 of this embodiment, the hook tail 23 is made of titanium alloy, and the hook cap 222 is made of 316 stainless steel.

[0076] As a further preferred embodiment of this embodiment, Figure 8 As shown, it also includes a hook connection member 24, and the hook connection member 24 includes:

[0077] A connecting sleeve 243, which is a cylindrical shape with one end sealed, suitable for connecting with the plug-in boss 112 of the main stair section 11; and a pin hole suitable for plugging the quick plug 113 is provided through the wall of the connecting sleeve 243;

[0078] Ear plates 241, a pair of ear plates 241 are integrally connected to the sealing end of the connecting sleeve 243 along the vertical direction;

[0079] A fixing bolt, wherein the fixing bolt is detachably disposed between the pair of lug plates 241;

[0080] The supporting boss 244 is arranged on the side wall of the connecting sleeve 243, and the supporting boss 244 is suitable for playing a certain supporting role when the hook 2 is connected to a wall or a hull.

[0081] In order to realize the adjustability of the hook 2 of this embodiment, as Figure 8 and Fig. 9 As shown, the two side surfaces of the connection end of the hook tail portion 23 are sloped. In actual use, the position of the hook 2 is different each time, and the relative position of the hook 2 and the climbing ladder will have a certain deviation. When the climbing ladder is hung, the main part of the ladder is vertical, so that the present embodiment has a certain degree of adjustability along the axial rotation of the fixing bolt 242. At the same time, since the two side surfaces are sloped, when the present embodiment is rotated to a certain angle, a limit stop will be generated to avoid safety accidents caused by excessive rotation angles. Since the width of the connection end of the hook tail portion 23 in this example is smaller than the width between the two ear plates 241, the present embodiment has a certain horizontal displacement space along the axial direction of the fixing bolt 242 at the connection with the climbing ladder, which can make the present embodiment have a certain adjustability in the horizontal direction, thereby increasing the applicability of the present embodiment. The cooperation between the hook 2 and the hook connector 24 enables the hook 2 to have a certain rotation angle around the fixing bolt 242. In the actual working process, the position of the hook 2 is not the same, but it is necessary to ensure that the hard ladder section 1 is always vertical to facilitate climbing work. At this time, the hook 2 can rotate around the fixing bolt 242 at a certain angle.

[0082] As a further preferred embodiment of this embodiment, Figure 2 and Figure 3 As shown, it also includes supporting feet 13, and there are two supporting feet 13. The two supporting feet 13 are symmetrically arranged on both sides of the main stair section 11 along the width direction, and are symmetrically arranged in a V shape.

[0083] As a further preferred embodiment of this embodiment, Figure 3As shown, a foot pad 131 is provided at the end of the support leg 13 away from the main stair section 11, and the cross-sectional area of ​​the foot pad 131 is larger than the cross-sectional area of ​​the support leg 13. The foot pad 131 effectively increases the contact area with the wall or the hull when the present embodiment is in use, thereby increasing the stability of the present embodiment when in use, and the distance between the end surface of the foot pad 131 and the main stair section 11 is greater than 80 mm. In actual use, the distance between the main stair section 11 and the wall or the hull is ensured to be greater than 80 mm, so that the staff will not be hindered when climbing.

[0084] This embodiment realizes floating data such as Fig.15 As shown, the weight of the whole ladder is:

[0085] 1.6×6+0.8+1.6+0.03×7=12.21(Kg)

[0086] The buoyancy that can be generated by completely immersing the climbing ladder in water is:

[0087] 2.28×6+1.12+0.65=15.45(Kg)

[0088] This enables the embodiment to float on the water surface, meeting the needs of water operations, and also greatly reduces the weight of the embodiment, making it easier to carry during special operations. Fig.15 The half ladder section is the hook connector 24 in this embodiment, and the latch is the quick latch 113 in this embodiment.

[0089] The present invention also provides a method for manufacturing a special climbing ladder, which is suitable for manufacturing a special climbing ladder and comprises the following steps:

[0090] S1, making a lightweight foam mold of the hard step 1, and sequentially attaching a carbon fiber composite layer and a carbon fiber impact-resistant layer to the outer side of the lightweight foam mold.

[0091] S2: drilling holes at both ends of the hard step 1 and installing titanium alloy metal bushings in the holes;

[0092] S3: making a lightweight foam mold of the hook body 21, and sequentially pasting a carbon fiber composite layer and a carbon fiber impact-resistant layer on the outer side of the lightweight foam mold;

[0093] S4: using a pre-embedding process to pre-embed the titanium alloy connector at the end of the hook body 21 in step S3;

[0094] S5: using a mold to make the hook cap 222 and the hook connector 24, and respectively installing the hook cap 222 and the hook cap 222 connector at both ends of the main ladder of the hook 2 in step S4;

[0095] S6: Connect the multiple hard ladder sections 1 in step S1 end to end, and connect the hook connector 24 in step S5 to the hard ladder section 1.

[0096] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A special climbing ladder, characterized in that: include: A hard staircase, wherein a plurality of the hard staircases are connected end to end by a connecting assembly; the hard staircase comprises a main staircase and a climbing ladder connected in one piece, wherein both the main staircase and the hard staircase are filled with light foam; the climbing ladder is alternately and equidistantly arranged on two opposite sides of the main staircase; A soft stair section, the soft stair section being arranged at the bottom end of the hard stair section at the tail section; A hook, the hook being arranged at the top of the hard ladder section at the first section; The climbing ladder comprises a climbing section and a supporting section, and the climbing section, the supporting section and the main ladder section of the climbing ladder together form a triangular structure; A place-taking boss suitable for stacking the hard ladder sections is provided on one side of the connection between the climbing section and the supporting section; The two opposite sides of the main stair section which are perpendicular to the climbing steps are respectively provided with stacking bosses and stacking grooves; Also included is a hook connector, the hook connector comprising: A connecting sleeve, which is a cylindrical sleeve with one end sealed, suitable for connecting with the plug-in boss of the main stair section; and a connecting pin hole suitable for quick plug-in is provided through the wall of the connecting sleeve; Ear plates, a pair of the ear plates are integrally connected to the sealing end of the connecting sleeve along the vertical direction, and the two side surfaces of the connecting end of the ear plates are sloped; A fixing bolt, wherein the fixing bolt is detachably disposed between the pair of lug plates; A supporting boss, the supporting boss being arranged on a side wall of the connecting sleeve; The hook includes: A hook body, the hook body is made of a carbon fiber tube, and includes a vertical section and a bending section connected in one piece; A hook tip portion, the hook tip portion is arranged at the end of the bending section, and comprises a hook cap and a connector suitable for plugging the hook cap, the connector is integrally connected to the bending section; The hook tail portion is arranged on the vertical section of the hook body, and comprises an embedded section arranged in the hook body and a connecting section suitable for connecting with the hook connecting piece.

2. The special climbing ladder according to claim 1, characterized in that: The connecting assembly includes plug-in grooves and plug-in bosses respectively arranged at the two ends of the rigid ladder sections, and the adjacent rigid ladder sections are connected by plugging and matching the plug-in grooves with the plug-in bosses; a quick latch is provided at the connection between the plug-in boss and the plug-in groove, which is suitable for fixing two adjacent rigid ladder sections.

3. The special climbing ladder according to claim 2, characterized in that: A pull ring is provided at one end of the quick bolt, and a chain fixed to the main ladder section is provided at the pull ring of the quick bolt. The other end of the quick bolt is conical and provided with a plug-in limiting structure.

4. The special climbing ladder according to claim 3, characterized in that: The climbing section of the climbing ladder is inclined, and the angle between the climbing section and the main ladder section is 85°-90°.

5. The special climbing ladder according to claim 4, characterized in that: It also includes two supporting feet, which are symmetrically arranged on both sides of the main stair section along the width direction and are symmetrically arranged in a V shape.

6. The special climbing ladder according to claim 5, characterized in that: A foot pad is provided at the end of the support foot away from the main stair section, the cross-sectional area of ​​the foot pad is larger than the cross-sectional area of ​​the support foot, and the distance between the surface side of the end of the foot pad and the main stair section is greater than 80 mm.

7. A method for manufacturing a special climbing ladder, suitable for manufacturing the special climbing ladder according to any one of claims 1 to 6, characterized in that: The steps include: S1. Making a lightweight foam mold for a hard stair step, and attaching a carbon fiber composite layer and a carbon fiber impact-resistant layer in sequence to the outer side of the lightweight foam mold; S2, drilling holes at both ends of the hard step and installing titanium alloy metal bushings in the holes; S3, making a lightweight foam mold for the hook body, and sequentially applying a carbon fiber composite layer and a carbon fiber impact-resistant layer to the outer side of the lightweight foam mold; S4, using a pre-embedding process to pre-embed the titanium alloy connector at the end of the hook body in step S3; S5, using a mold to make a hook cap and a hook connector, and respectively installing the hook cap and the hook cap connector on two ends of the hook body in step S4; S6, connecting the multiple rigid ladder sections in step S1 end to end, and connecting the hook connector in step S5 to the rigid ladder sections.

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