Ladder cage wall connecting piece structure of variable cross-section hollow pier and method

Abstract

The invention provides a ladder cage wall connecting piece structure and method for a variable-section hollow pier, and belongs to the technical field of pier construction, the ladder cage wall connecting piece structure comprises a first rod body, the first rod body is used for being inserted into a prefabricated hole in the side wall of the hollow pier, an inserting groove is formed in the first rod body in the length direction, and one end of a second rod body is inserted into the inserting groove of the first rod body; the second rod body is fixed to the first rod body in a threaded penetrating mode through a plurality of screws, and a clamping groove is formed in the end, extending out of the inserting groove, of the second rod body; the connecting blocks are fixedly connected to the bottom walls of the vertical rods of the ladder cage; the number of each group of clamping blocks is two, the clamping blocks are rotationally connected to the two sides of the clamping groove in the width direction, each group of clamping blocks is provided with an open state and a closed state, and the limiting pieces are used for keeping each group of clamping blocks in the closed state all the time. The ladder cage and the hollow pier can be stably and efficiently connected, and the construction safety and quality of the variable-cross-section hollow pier are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge pier construction, and in particular to a ladder cage wall connection member structure and method for a hollow pier with a variable cross-section. Background Art

[0002] In bridge engineering, variable-section hollow piers have excellent performance in bearing heavy loads and earthquake resistance due to their unique structural characteristics. In order to ensure the structural strength and stability of variable-section hollow piers, ladder cages are usually used during construction.

[0003] However, the support methods of ladder cages in the prior art often rely on temporary supports or tie rods, which have certain defects. First, the temporary support has poor stability and is easily affected by the external environment and becomes unstable, leading to potential safety hazards during construction. Secondly, the tie rod connection method is complicated, and the installation and disassembly are cumbersome, which increases the construction difficulty and construction period. In addition, these traditional methods have low operational safety during high-altitude operations, and it is difficult to ensure that the ladder cage fits tightly with the hollow pier, which may affect the molding quality of the pier body. Therefore, there is an urgent need for a more stable and efficient connection method to improve the safety and quality of the construction of variable-section hollow piers. Summary of the invention

[0004] The object of the present invention is to provide a ladder cage wall connection structure and method for a variable-section hollow pier, which can stably and efficiently connect the ladder cage to the hollow pier and improve the safety and quality of the variable-section hollow pier construction.

[0005] In a first aspect, the embodiments of the present invention are implemented by the following technical solutions:

[0006] A ladder cage wall connecting member structure of a hollow pier with a variable cross-section, comprising a first rod body, the first rod body being used to be inserted into a prefabricated hole of a side wall of the hollow pier, the first rod body being provided with an inserting groove along a length direction, a base plate being fixedly sleeved on the first rod body, the base plate being abutted against the side wall of the hollow pier, and the four corners of the base plate being fixed to the side wall of the hollow pier by expansion bolts;

[0007] A second rod body, one end of the second rod body is inserted into the insertion slot of the first rod body, and the other end extends out of the insertion slot of the first rod body, the second rod body is fixed to the first rod body by a plurality of screws threaded through, and a clamping slot is formed at one end of the second rod body extending out of the insertion slot, and the clamping slot is located on the top wall of the second rod body;

[0008] A connecting block, the connecting block being fixedly connected to the bottom wall of the vertical rod of the elevator cage;

[0009] Card blocks, wherein the card blocks are arranged in multiple groups, and the multiple groups of card blocks are distributed along the length direction of the card slot, and the number of card blocks in each group is two and they are rotatably connected to both sides of the width direction of the card slot, and each group of card blocks is configured with an open state and a closed state, wherein:

[0010] When each group of the clamping blocks is in a rotationally opened state, the connecting block can be vertically moved into the clamping slot;

[0011] When each group of the blocks is in a rotationally closed state, there is a gap between each group of the blocks, and the gap between each group of the blocks and the projection of the slot of the second rod body along the length form a T-shaped slot, and the blocks are arranged to abut against the side wall of the vertical rod of the elevator cage;

[0012] A limiting member is connected to the second rod body, and is used to keep each group of clamping blocks in a closed state.

[0013] Furthermore, a positioning rod is provided on the inner bottom wall of the insertion slot of the first rod body, and the length direction of the positioning rod is the same as the length direction of the insertion slot. A positioning slot is provided on the side wall of the second rod body facing the first rod body, and the positioning rod and the positioning slot are plugged into each other.

[0014] Furthermore, a flaring groove is provided on the opening side of the positioning rod toward the plug-in slot, and a flaring rod is fixedly arranged in the positioning slot of the second rod body opposite to the flaring groove, and the diameter of the opening of the positioning slot gradually increases toward the bottom wall of the positioning slot.

[0015] Furthermore, the spacing of the expanding groove gradually decreases toward its bottom wall, the bottom of the expanding groove is formed with an outer shape that is the same as the shape of the expanding rod, and the diameter of the bottom shape of the expanding groove is not greater than the diameter of the expanding rod.

[0016] Furthermore, the limiting member includes a rod sleeve, which is open at one end of the rod sleeve toward the second rod body, and a avoidance opening is provided on the top wall of the rod sleeve, and the avoidance opening is communicated with the opening of the rod sleeve, and the avoidance opening is used to avoid the vertical rod of the ladder cage, and the rod sleeve is used to be slidably mounted on the second rod body and the block to limit the rotation and opening of each group of blocks.

[0017] Furthermore, limiting spring sheets are fixedly provided on both side walls of the second rod body, and a guiding inclined surface is provided on the side of the limiting spring sheet inserted toward the rod sleeve. The limiting spring sheet includes an abutment portion, and a limiting opening is provided on the rod sleeve. The limiting opening is snap-fitted with the limiting spring sheet, and at this time, the abutment portion of the limiting spring sheet abuts against the limiting opening.

[0018] Furthermore, a reinforcing hook is hingedly provided at the avoidance opening of the rod sleeve near one end for inserting the second rod body, and the hinge axis direction of the reinforcing hook is the same as the length direction of the rod sleeve. The reinforcing hook is used to cross the avoidance opening after rotation, and the hook portion of the reinforcing hook is hooked on the side wall of the rod sleeve. A limiting protrusion is fixedly provided on the hook portion of the reinforcing hook, and a groove matching the limiting protrusion is opened on the side wall of the rod sleeve.

[0019] Furthermore, a rubber elastic rope is arranged between each group of the card blocks, and two ends of the plurality of rubber elastic ropes are respectively connected to each group of the card blocks.

[0020] Furthermore, a locking piece is provided on the bottom wall of the slot of the second rod body along the length direction, the two ends of the locking piece are arranged in an eight-shaped shape and are fixedly connected to the bottom wall of the slot, the middle position of the locking piece is arranged in an arch shape, and the circumference of the arch cross section is greater than half of the circumference of the circle, and a bottom groove is provided on the connecting block of the vertical rod of the ladder cage to be plugged and matched with the locking piece;

[0021] And / or, a locking tongue is fixedly provided on the side walls of the second rod, the projection of the locking tongue along the length direction of the second rod is 'T' shaped, and a locking groove is formed on the first rod opposite to the locking tongue, and the locking tongue and the locking groove are engaged with each other.

[0022] In a second aspect, the embodiments of the present invention are implemented by the following technical solutions:

[0023] A method for using a ladder cage wall connection structure of a variable-section hollow pier, which is applicable to the ladder cage wall connection structure of a variable-section hollow pier described in the above scheme, comprises the following steps:

[0024] S1: The first rod is fixedly installed in the prefabricated hole of the side wall of the hollow pier and fixed with expansion bolts;

[0025] S2: insert and fix the second rod into the insertion groove of the first rod and fix it with a screw;

[0026] S3: Align the connecting block on the vertical rod of the elevator cage with the slot and insert it vertically;

[0027] S4: The two clamping blocks corresponding to the vertical rod positions of the rotating cage are clamped on the vertical rod of the cage, and the limiting members are used to fix all the clamping blocks in a closed state, thereby finally realizing the wall-connected installation of the cage.

[0028] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0029] 1. The present invention sets a first rod body, inserts the second rod body into the insertion groove of the first rod body, uses expansion bolts to fix the base plate and the first rod body, and inserts the connecting block of the vertical rod of the ladder cage into the slot, and then uses the limiter to fix the vertical rod of the ladder cage, thereby realizing the connection between the ladder cage and the hollow pier, and improving the safety and quality of the construction of the variable-section hollow pier.

[0030] 2. The present invention can fix the positions of all the blocks by arranging the rod sleeve, thereby fixing the connecting blocks of the vertical rods of the elevator cage. The fixing method is simple and reliable, and the positions of the vertical rods of the elevator cage can be adaptively adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 The overall structural schematic diagram of the ladder cage wall connecting member structure of the variable cross-section hollow pier provided by the present invention;

[0033] Figure 2 The present invention is intended to show a schematic structural diagram of a first rod body, a second rod body, a rod sleeve and a vertical rod;

[0034] Figure 3 The present invention is intended to show the structure schematic diagram of the clamping block in the state of rotation opening and the reinforcing hook in the state of rotation opening;

[0035] Figure 4 The present invention is intended to show the schematic diagram of the structure of the rod sleeve;

[0036] Figure 5 This is a schematic diagram of the structure of the present invention to show that the clamping block is in a rotationally closed state;

[0037] Figure 6 This is a schematic diagram of the structure of the expansion rod and the positioning rod for the purpose of the present invention;

[0038] Figure 7 For the present invention Figure 6 A magnified view of part A;

[0039] Figure 8 The present invention is intended to show an exploded view of the flaring rod, the positioning rod and the first rod body;

[0040] Icons: 1-hollow pier, 2-first rod body, 21-plug-in slot, 22-base plate, 221-expansion bolt, 222-rib plate, 23-positioning rod, 231-expansion slot, 24-locking slot, 3-second rod body, 31-card slot, 32-card block, 321-T-slot, 322-arc notch, 33-screw, 34-positioning slot, 341-expansion rod, 35-limiting spring piece, 351-guide slope, 352-abutment part, 36-lock tongue, 4-vertical rod, 41-connecting block, 411-bottom slot, 5-limiting piece, 51-rod sleeve, 511-avoidance, 512-groove, 52-reinforcement hook, 521-hook, 522-limiting protrusion, 53-limiting mouth, 6-rubber elastic rope, 7-locking sheet. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0043] Example

[0044] The following is further described in conjunction with specific embodiments. Figure 1-Figure 8 As shown, the present invention is a ladder cage wall connection structure of a variable-section hollow pier, including a first rod body 2, the first rod body 2 is square, the first rod body 2 is used to be inserted into a prefabricated hole on the side wall of the hollow pier 1, the first rod body 2 is provided with a square insertion groove 21 along the length direction, a base plate 22 is welded on the first rod body 2, the base plate 22 is perpendicular to the first rod body 2, a rib plate 222 is arranged between the base plate 22 and the first rod body 2, the cross-section of the rib plate 222 is square, the base plate 22 is square, the base plate 22 abuts against the side wall of the hollow pier 1, and the four corners of the base plate 22 are fixed to the side wall of the hollow pier 1 by expansion bolts 221.

[0045] Reference Figure 2 and Figure 3As shown, one end of the second rod body 3 is inserted into the insertion slot 21 of the first rod body 2, and the other end extends out of the insertion slot 21 of the first rod body 2. The second rod body 3 is threaded and fixed to the first rod body 2 by multiple screws 33. A card slot 31 is provided at one end of the second rod body 3 extending out of the insertion slot 21. The card slot 31 is located on the top wall of the second rod body 3; and the connecting block 41 is welded to the bottom wall of the vertical rod 4 of the ladder cage. The connecting block 41 is square and matches the card slot 31.

[0046] It should be noted that multiple groups of blocks 32 are provided to adapt to the position of the connecting block 41 on the vertical rod 4 of the ladder cage, and the multiple groups of blocks 32 are distributed along the length direction of the slot 31. The number of blocks 32 in each group is two and they are rotatably connected on both sides of the width direction of the slot 31. Each group of blocks 32 is configured with an open state and a closed state, wherein: when each group of blocks 32 is in a rotationally open state, the connecting block 41 can be vertically moved into the slot 31; when each group of blocks 32 is in a rotationally closed state, there is a gap between each group of blocks 32, and the gap between each group of blocks 32 and the projection of the slot 31 of the second rod body 3 along the length form a T-shaped groove 321, which can fix the connecting block 41, and the arc-shaped notch 322 of the block 32 abuts against the side wall of the vertical rod 4 of the ladder cage to prevent the vertical rod 4 of the ladder cage from shaking.

[0047] Reference Figure 6 and Figure 7 As shown, in order to further fix and position the second rod body 3, a positioning rod 23 is welded to the inner bottom wall of the plug-in slot 21 of the first rod body 2. The cross-section of the positioning rod 23 is circular, and the length direction of the positioning rod 23 is the same as the length direction of the plug-in slot 21. A positioning groove 34 is provided on the side wall of the second rod body 3 facing the first rod body 2, and the positioning rod 23 and the positioning groove 34 are plugged into and matched with each other.

[0048] Reference Figure 6 As shown, a flaring groove 231 is provided on the opening side of the positioning rod 23 facing the plug-in groove 21, and a flaring rod 341 is welded at a position opposite to the flaring groove 231 in the positioning groove 34 of the second rod body 3. The diameter of the opening of the positioning groove 34 gradually increases toward the bottom wall of the positioning groove 34, and the spacing of the flaring groove 231 gradually decreases toward its own bottom wall. The bottom of the flaring groove 231 is formed with an outer shape that is the same as the shape of the flaring rod 341, and the diameter of the bottom shape of the flaring groove 231 is not greater than the diameter of the flaring rod 341.

[0049] Reference Figure 1 and Figure 2As shown, the limiting member 5 and the second rod body 3 are slidably mounted on each other, the limiting member 5 is a rod sleeve 51, the rod sleeve 51 is square, and the end of the rod sleeve 51 facing the second rod body 3 is open. The top wall of the rod sleeve 51 is provided with an avoidance opening 511, and the avoidance opening 511 is connected to the opening of the rod sleeve 51. The avoidance opening 511 is used to avoid the vertical rod 4 of the ladder cage. The rod sleeve 51 is used to be slidably mounted on the second rod body 3 and the block 32 to limit the rotation and opening of each group of blocks 32.

[0050] Reference Figure 4 and Figure 5 As shown, limiting spring pieces 35 are welded to the side walls of both sides of the second rod body 3, and a guiding inclined surface 351 is provided on the side of the limiting spring piece 35 inserted toward the rod sleeve 51, and the limiting spring piece 35 includes an abutting portion 352, and a limiting opening 53 is provided on the rod sleeve 51, and the limiting opening 53 is snap-fitted with the limiting spring piece 35, and at this time, the abutting portion 352 of the limiting spring piece 35 abuts against the limiting opening 53.

[0051] Reference Figure 3 and Figure 4 As shown, a reinforcing hook 52 is hingedly provided at the avoidance opening 511 of the rod sleeve 51 near one end for inserting the second rod body 3, and the hinge axis direction of the reinforcing hook 52 is the same as the length direction of the rod sleeve 51. The reinforcing hook 52 is used to cross the avoidance opening 511 after rotation, and the hook portion 521 of the reinforcing hook 52 is hooked on the side wall of the rod sleeve 51. The hook portion 521 of the reinforcing hook 52 is welded with a limiting protrusion 522, and the limiting protrusion 522 is semicircular. The side wall of the rod sleeve 51 is provided with a groove 512 that matches the limiting protrusion 522.

[0052] Reference Figure 5 and Figure 6 As shown, a rubber elastic rope 6 is provided between each group of blocks 32 , and both ends of the multiple rubber elastic ropes 6 are respectively connected to each group of blocks 32 . The rubber elastic ropes 6 can play a role in resetting and limit the position of the connecting block 41 at the same time.

[0053] Reference Figure 2 and Figure 7 As shown, a locking piece 7 is provided on the bottom wall of the slot 31 of the second rod body 3 along the length direction, and the two ends of the locking piece 7 are arranged in an eight-shaped shape and fixedly connected to the bottom wall of the slot 31, and the middle position of the locking piece 7 is arranged in an arch shape, and the circumference of the arch cross section is greater than half of the circumference of the circle, and a bottom groove 411 that is plugged and matched with the locking piece 7 is opened on the connecting block 41 of the vertical rod 4 of the ladder cage;

[0054] Reference Figure 2 and Figure 5As shown, a locking tongue 36 is fixedly provided on the side walls around the second rod body 3, and the projection of the locking tongue 36 along the length direction of the second rod body 3 is in a 'T' shape. A locking groove 24 is provided at a position of the first rod body 2 opposite to the locking tongue 36, and the locking tongue 36 and the locking groove 24 are engaged with each other, and the locking tongue 36 and the locking groove 24 can further play a role in fixing the second rod body 3.

[0055] In addition, the embodiments of the present invention are implemented by the following technical solutions:

[0056] A method for using a ladder cage wall connection structure of a variable-section hollow pier, which is applicable to the ladder cage wall connection structure of a variable-section hollow pier in the above scheme, comprises the following steps:

[0057] S1: The first rod body 2 is fixedly installed in the prefabricated hole of the side wall of the hollow pier 1 and fixed with an expansion bolt 221;

[0058] S2: insert and fix the second rod body 3 into the insertion groove 21 of the first rod body 2 and fix it with a screw rod 33;

[0059] S3: Align the connecting block 41 on the vertical rod 4 of the elevator cage with the slot 31 and insert it vertically;

[0060] S4: The two blocks 32 corresponding to the positions of the vertical rod 4 of the rotating cage are clamped on the vertical rod 4 of the cage, and the limiting member 5 is used to fix all the blocks 32 in a closed state, and finally the wall connection installation of the cage is realized.

[0061] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A ladder cage wall connection structure for a hollow pier with a variable cross-section, characterized in that: include: A first rod body (2), the first rod body (2) is used to be inserted into a prefabricated hole on the side wall of the hollow pier (1), the first rod body (2) is provided with an insertion groove (21) along the length direction, a base plate (22) is fixedly sleeved on the first rod body (2), the base plate (22) is arranged to abut against the side wall of the hollow pier (1), and the four corners of the base plate (22) are fixed to the side wall of the hollow pier (1) by expansion bolts (221); A second rod body (3), one end of the second rod body (3) is inserted into the insertion slot (21) of the first rod body (2), and the other end protrudes from the insertion slot (21) of the first rod body (2); the second rod body (3) is threadedly fixed to the first rod body (2) by a plurality of screws (33); a clamping slot (31) is formed at one end of the second rod body (3) protruding from the insertion slot (21); and the clamping slot (31) is located on the top wall of the second rod body (3); A connecting block (41), wherein the connecting block (41) is fixedly connected to the bottom wall of the vertical rod (4) of the elevator cage; A card block (32), wherein the card blocks (32) are arranged in a plurality of groups, the plurality of groups of card blocks (32) are distributed along the length direction of the card slot (31), each group of the card blocks (32) has two card blocks (32) and are rotatably connected to two sides of the card slot (31) in the width direction, and each group of the card blocks (32) is configured with an open state and a closed state, wherein: when each group of the card blocks (32) is in the rotationally open state, the connection block (41) can be vertically moved into the card slot (31); When each group of the clamping blocks (32) is in a rotationally closed state, each group of the clamping blocks (32) is provided with a gap, and the gap between each group of the clamping blocks (32) and the projection of the clamping groove (31) of the second rod body (3) along the length form a T-shaped groove (321), and the clamping blocks (32) are provided in contact with the side wall of the vertical rod (4) of the elevator cage; A limiting member (5), the limiting member (5) being connected to the second rod body (3), and the limiting member (5) being used to keep each group of clamping blocks (32) in a closed state at all times.

2. The ladder cage wall connecting member structure of the variable cross-section hollow pier according to claim 1 is characterized in that: A positioning rod (23) is provided on the inner bottom wall of the insertion slot (21) of the first rod body (2), and the length direction of the positioning rod (23) is the same as the length direction of the insertion slot (21). A positioning slot (34) is provided on the side wall of the second rod body (3) facing the first rod body (2), and the positioning rod (23) and the positioning slot (34) are plugged into and matched with each other.

3. The ladder cage wall connecting member structure of the variable cross-section hollow pier according to claim 2 is characterized in that: The positioning rod (23) is provided with a flaring groove (231) on one side of the opening facing the plugging groove (21); a flaring rod (341) is fixedly provided in the positioning groove (34) of the second rod body (3) at a position facing the flaring groove (231); and the diameter of the opening of the positioning groove (34) gradually increases in the direction of the bottom wall of the positioning groove (34).

4. The ladder cage wall connecting member structure of the variable cross-section hollow pier according to claim 3 is characterized in that: The spacing of the expanding groove (231) gradually decreases toward its bottom wall, and the bottom of the expanding groove (231) is formed with an outer shape that is the same as the shape of the expanding rod (341), and the diameter of the bottom shape of the expanding groove (231) is not greater than the diameter of the expanding rod (341).

5. The ladder cage wall connecting member structure of the variable cross-section hollow pier according to claim 4 is characterized in that: The limiting member (5) comprises a rod sleeve (51), the rod sleeve (51) is arranged with an opening at one end facing the second rod body (3), a top wall of the rod sleeve (51) is provided with an escape opening (511), the escape opening (511) is communicated with the opening of the rod sleeve (51), the escape opening (511) is used to escape the vertical rod (4) of the elevator cage, and the rod sleeve (51) is used to be slidably sleeved on the second rod body (3) and the block (32) to limit the rotation and opening of each group of blocks (32).

6. The ladder cage wall connecting member structure of the variable cross-section hollow pier according to claim 5, characterized in that: The side walls of both sides of the second rod body (3) are fixedly provided with limiting spring pieces (35); a guiding inclined surface (351) is provided on the side of the limiting spring piece (35) inserted toward the rod sleeve (51); the limiting spring piece (35) comprises an abutting portion (352); a limiting opening (53) is provided on the rod sleeve (51); the limiting opening (53) and the limiting spring piece (35) are in a snap-fitting manner; at this time, the abutting portion (352) of the limiting spring piece (35) is abutted against the limiting opening (53).

7. The ladder cage wall connecting member structure of the variable cross-section hollow pier according to claim 5, characterized in that: A reinforcing hook (52) is hingedly provided at the avoidance opening (511) of the rod sleeve (51) near one end inserted into the second rod body (3); the hinge axis direction of the reinforcing hook (52) is the same as the length direction of the rod sleeve (51); the reinforcing hook (52) is used to cross the avoidance opening (511) after rotation; the hook portion (521) of the reinforcing hook (52) is hooked on the side wall of the rod sleeve (51); the hook portion (521) of the reinforcing hook (52) is fixedly provided with a limiting protrusion (522); and the side wall of the rod sleeve (51) is provided with a groove (512) matched with the limiting protrusion (522).

8. The ladder cage wall connecting member structure of the variable cross-section hollow pier according to claim 5, characterized in that: A rubber elastic rope (6) is arranged between each group of the clamping blocks (32), and two ends of a plurality of the rubber elastic ropes (6) are respectively and correspondingly connected to each group of the clamping blocks (32).

9. The ladder cage wall connecting member structure of the variable cross-section hollow pier according to claim 1, characterized in that: A locking piece (7) is provided on the bottom wall of the slot (31) of the second rod body (3) along the length direction, the two ends of the locking piece (7) are arranged in an eight-shaped shape and are fixedly connected to the bottom wall of the slot (31), the middle position of the locking piece (7) is arranged in an arch shape, and the circumference of the arch cross section is greater than half of the circumference of the circle, and a bottom groove (411) plugged with the locking piece (7) is provided on the connecting block (41) of the vertical rod (4) of the ladder cage; And / or, a locking tongue (36) is fixedly provided on the side walls around the second rod body (3), the projection of the locking tongue (36) along the length direction of the second rod body (3) is in a 'T' shape, and a locking groove (24) is provided on the first rod body (2) at a position opposite to the locking tongue (36), and the locking tongue (36) and the locking groove (24) are engaged with each other.

10. A method for using a ladder cage wall connection structure of a variable cross-section hollow pier, characterized in that: The ladder cage wall connecting member structure applicable to the variable cross-section hollow pier according to any one of claims 1 to 9 comprises the following steps: S1: The first rod body (2) is fixedly installed in the prefabricated hole on the side wall of the hollow pier (1), and fixed with expansion bolts (221); S2: inserting and fixing the second rod body (3) into the insertion groove (21) of the first rod body (2) and fixing it with a screw rod (33); S3: Align the connecting block (41) on the vertical rod (4) of the elevator cage with the slot (31) and insert it vertically; S4: two clamping blocks (32) corresponding to the positions of the vertical rod (4) of the rotating cage are clamped on the vertical rod (4) of the cage, and the limiting member (5) is used to fix all the clamping blocks (32) in a closed state, thereby finally achieving the wall-connected installation of the cage.

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