A wall connecting member and an external scaffold fixing method

Abstract

This application relates to a reusable wall tie and a method for fixing external scaffolding, relating to the field of scaffolding erection. It includes a pre-embedded nut, a connecting bolt, and a connector. The connecting bolt is detachably threaded to the pre-embedded nut. The connector is installed on the connecting bolt, and has a first through hole for accommodating a steel pipe. By pre-embedding the pre-embedded nut in the wall, when external scaffolding needs to be installed, simply connect the connecting bolt to the pre-embedded nut, then install the connector onto the connecting bolt, and finally pass the steel pipe of the external scaffolding through the first through hole. The connector then provides support to the external scaffolding, thus fixing it in place. By using the pre-embedded nut and connecting bolt, there is no need to drill additional holes in the wall. This application has the effect of eliminating the need for additional drilling in the wall when installing scaffolding.

Description

Technical Field

[0001] This application relates to the field of scaffolding erection, and in particular to a reusable wall tie and a method for fixing external scaffolding. Background Technology

[0002] With the development of the construction industry, external scaffolding is commonly used for safety protection during construction. The external scaffolding is securely fixed to the main structure using wall ties. Currently, the most commonly used wall tie methods are post-anchoring and column-clamping. The post-anchoring method involves drilling holes in the main structure and installing expansion bolts after the concrete is poured. The wall ties with anchor plates are then fixed to the main structure using the expansion bolts to tie the external scaffolding. However, this method requires additional drilling into the wall, which may cause the wall to crack and affect its stability. The column-hugging method is mainly used where the main structure has frame columns or window openings. The wall ties are fixed by connecting the main structure frame columns with steel pipes and fasteners. This method does not require additional drilling, but its construction environment is more limited. For whole walls without frame columns or window openings, it does not have the structure for column-hugging, and it is still necessary to drill holes in the wall and install expansion bolts.

[0003] Therefore, providing a wall connection that does not require additional drilling into the solidified wall is an urgent problem to be solved. Summary of the Invention

[0004] To eliminate the need for additional drilling into the wall during scaffolding installation, this application provides a reusable wall tie and a method for fixing external scaffolding.

[0005] Firstly, the reusable wall tie provided in this application adopts the following technical solution: A reusable wall tie includes: Pre-embedded nuts; A connecting screw, wherein the connecting screw is detachably threadedly connected to the pre-embedded nut; and A connector is mounted on the connecting screw, and the connector has a first through hole for accommodating a steel pipe.

[0006] By adopting the above technical solution, the pre-embedded nut is embedded in the wall. When it is necessary to install the external scaffold, simply connect the connecting rod to the pre-embedded nut, then install the connector onto the connecting rod, and finally pass the steel pipe in the external scaffold through the first through hole. The connector can then provide support for the external scaffold to fix it. By setting the pre-embedded nut and connecting rod, there is no need to drill additional holes in the wall.

[0007] Optionally, it also includes: a pre-embedded sleeve having a second through hole, the second through hole communicating with the threaded hole of the pre-embedded nut; One end of the pre-embedded sleeve is fixedly connected to the pre-embedded nut, and the other end extends toward the side of the connector. The first through hole of the pre-embedded sleeve coincides with the central axis of the pre-embedded nut.

[0008] By adopting the above technical solution, when pouring the wall, an embedded sleeve is placed on one side of the embedded nut. The end of the embedded sleeve away from the embedded nut contacts the formwork. This allows a certain distance to be left between the embedded nut and the wall surface, improving the stability of the connection between the embedded nut and the wall. At the same time, it can prevent concrete from entering the embedded sleeve, so as to facilitate the subsequent threaded connection between the connecting bolt and the embedded nut.

[0009] Optionally, the embedded sleeve is a plastic sleeve.

[0010] By adopting the above technical solution, plastic sleeves have the advantages of being lighter and cheaper than iron parts.

[0011] Optionally, a connecting rod is detachably connected to the side of the connecting screw away from the pre-embedded nut, and the connecting rod is arranged parallel to the connecting screw; the connecting piece is detachably installed on the connecting rod and detachably connected to the connecting rod.

[0012] By adopting the above technical solution, after the scaffolding is used up, the connecting rods can be removed and the connecting bolts can be left in the wall, which can reduce the amount of rainwater entering between the bolts and the inner wall of the pre-embedded sleeve.

[0013] Optionally, a hanging ring with a hanging hole is fixedly connected to the side wall of the connector, and the hanging ring is used for the connecting rod to pass through.

[0014] By adopting the above technical solution, when the connector needs to be installed on the connecting rod, it is only necessary to move the hanging ring so that the connecting rod can be inserted into the hanging hole, which can improve the convenience of operation.

[0015] Optionally, it also includes multiple anti-detachment components, which are circumferentially distributed around a rotation axis, the rotation axis being collinear with the central axis of the connecting rod; each anti-detachment component includes: A rotating rod having a first free end and a first rotating end, the first rotating end of the rotating rod being elastically hinged to the connecting rod by a first torsion spring, so that the rotating rod can be adjusted between a first retracted posture and a first open posture, the rotating rod being perpendicular to the rotation axis along the rotation axis of the connecting rod; and A stop block protruding from the first free end of the rotating rod extends toward the side away from the rotation axis, and the end face of the stop block near the first rotating end is a stop surface. When the rotating rod is in the first retracted position, the hanging hole allows the rotating rod to pass through; When the rotating rod is in the first open position, the stop surface can contact the end of the hanging ring away from the pre-embedded nut, which is used to prevent the hanging ring from disengaging from the rotating rod as it moves toward the side away from the pre-embedded nut.

[0016] By adopting the above technical solution, when installing the hanging ring, first adjust the rotating rod to the first retracted posture, then move the hanging ring so that the anti-detachment component passes through the hanging hole. After the hanging ring and the anti-detachment component are separated, the first torsion spring will drive the rotating rod to adjust to the first expanded posture, and the stop block will prevent the hanging ring from detaching from the connecting rod, thereby improving the stability of the hanging ring connection.

[0017] Optionally, the stop block has a guide surface located at one end of the stop block away from the pre-embedded nut, and the guide surface is located on the side of the stop block away from the rotation axis; The guide surface is inclined toward the side away from the axis of rotation in the direction from the first free end to the first rotating end.

[0018] By adopting the above technical solution, when moving the hanging ring, the hanging ring first contacts the guide surface, so as to push the guide surface to move the anti-detachment component toward the rotation axis. It does not require personnel to push the anti-detachment component to the first retracted position by hand, which makes it convenient for personnel to carry out the installation of the hanging ring.

[0019] Optionally, it also includes auxiliary stopping components, each of the anti-detachment components having a corresponding auxiliary stopping component connected to it, the auxiliary stopping component comprising: An auxiliary stop rod, with one end being a second free end and the other end being a second rotating end, is located on the side of the stop block near the pre-embedded nut. The second rotating end of the auxiliary stop rod is elastically hinged to the stop block via a second torsion spring, allowing the auxiliary stop rod to be adjusted between a second retracted posture and a second open posture. The auxiliary stop rod is parallel to the rotation axis of the rotating rod along the connecting rod, along the hinge axis of the stop block. A limiting block is fixedly connected to the stopping surface of the stop block, and the second rotating end is located on the side of the limiting block closer to the rotation axis. When the auxiliary stop is in the second open posture, the auxiliary stop is tilted toward the side away from the rotation axis in the direction from the first free end to the first rotating end, and the second free end of the auxiliary stop is located outside the orthogonal projection of the stop block in the direction parallel to the rotation axis.

[0020] By adopting the above technical solution and setting an auxiliary stop bar, a double protection is formed for the hanging ring, which can further improve the stability of the hanging ring connection on the connecting rod.

[0021] Optionally, the end of the connecting rod away from the connecting screw has a clearance groove for accommodating the auxiliary stop bar.

[0022] By adopting the above technical solution, the installation requirements of hanging rings with smaller apertures can be met by retracting the auxiliary stop bar into the clearance groove.

[0023] Secondly, this application provides a method for fixing external scaffolding, which adopts the following technical solution: A method for fixing external scaffolding includes the following steps: S1: Connect the connecting screw to the pre-embedded nut to fix the wall tie to the wall; S2: Move the hanging ring so that it is hooked onto the connecting rod; S3: Erect the external scaffolding and thread the steel pipes in the external scaffolding through the first through hole on the connector.

[0024] By adopting the above technical solution and using wall ties, the external scaffolding can be connected to the wall without drilling additional holes in the wall.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. This application eliminates the need for additional drilling into the wall when installing scaffolding; 2. By incorporating anti-detachment components and auxiliary stop components, the hanging ring can be prevented from detaching from the connecting rod; 3. By creating clearance grooves on the connecting rod, it is easy to install hanging rings with smaller diameter holes onto the connecting rod. Attached Figure Description

[0026] Figure 1 This is a schematic diagram showing the embedded nuts, connecting bolts, and embedded sleeves of the wall ties in this application embedded in the wall. Figure 2 This is a structural schematic diagram of the threaded post and threaded hole in the wall tie of this application; Figure 3 This is a structural schematic diagram of the anti-detachment component in the wall tie of this application; Figure 4 yes Figure 3 Enlarged view of section A; Figure 5 This is a structural schematic diagram of the auxiliary stopping component in the wall tie of this application; Figure 6 yes Figure 5 Enlarged view of section B; Figure 7This is a structural schematic diagram of the positioning pin in the wall tie component of this application.

[0027] Explanation of reference numerals in the attached drawings: 01, wall; 1, embedded nut; 2, connecting screw; 21, threaded hole; 3, connector; 31, first through hole; 32, hanging ring; 321, hanging hole; 4, embedded sleeve; 41, second through hole; 42, sealing block; 5, connecting rod; 51, threaded post; 52, clearance groove; 53, limiting hole; 6, anti-detachment component; 61, rotating rod; 611, first free end; 612, first rotating end; 62, stop block; 621, stop surface; 622, guide surface; 63, first torsion spring; 7, auxiliary stop component; 71, auxiliary stop rod; 711, second free end; 712, second rotating end; 72, limiting block; 73, second torsion spring; 8, limiting pin. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0029] This application discloses a reusable wall tie. (Refer to...) Figure 1 The reusable wall tie includes a pre-embedded nut 1, a connecting screw 2, and a connector 3. The pre-embedded nut 1 is embedded in the wall 01, and the connecting screw 2 passes through the wall 01 and is threadedly connected to the pre-embedded nut 1. To avoid additional drilling, the wall tie also includes a pre-embedded sleeve 4 with a second through hole 41. One end of the pre-embedded nut 1 is fixedly connected to the pre-embedded sleeve 4, and the other end is fixedly connected to a sealing block 42. The length of the pre-embedded sleeve 4 and the central axis of the pre-embedded nut 1 are both parallel to the first direction. In this disclosure, the pre-embedded sleeve 4 and the pre-embedded nut 1 are coaxially arranged. The pre-embedded sleeve 4 is located on the side of the pre-embedded nut 1 closer to the scaffold. One end of the pre-embedded sleeve 4 communicates with the screw hole of the pre-embedded nut 1, and the other end communicates with the outside of the wall 01. The sealing block 42 is used to seal the end of the pre-embedded nut 1 away from the pre-embedded sleeve 4. Preferably, the pre-embedded sleeve 4 in this disclosure is a plastic sleeve.

[0030] Reference Figure 1 The connector 3 has a first through hole 31 for accommodating a steel pipe. The connector 3 is detachably connected to the connecting screw 2 so that the steel pipe passing through the first through hole 31 can be connected to the wall 01 through the connector 3. In order to facilitate the installation of the connector 3 on the connecting screw 2, in some embodiments of this application, the side wall of the connector 3 is fixedly connected to a hanging ring 32 with a hanging hole 321. The hanging hole 321 allows the connecting screw 2 to pass through so that the connector 3 can be hung on the connecting screw 2 by means of hanging.

[0031] Reference Figure 1 and Figure 2In some embodiments of this application, the end of the connecting screw 2 near the pre-embedded nut 1 is threaded to the pre-embedded nut 1, and the end of the connecting screw 2 away from the pre-embedded nut 1 is located inside the pre-embedded sleeve 4. Thus, after the scaffolding is removed, the wall surface of the wall 01 can be ensured to be flat without cutting the connecting screw 2. Under these conditions, in order to attach the hanging ring 32, in this disclosure, the end of the connecting screw 2 away from the pre-embedded nut 1 is detachably connected to a connecting rod 5. The connecting rod 5 is coaxially arranged with the connecting screw 2. The wall of the end of the connecting screw 2 away from the pre-embedded nut 1 is coplanar with the wall surface of the wall 01 near the scaffold. A threaded hole 21 is provided at the end of the connecting screw 2 away from the pre-embedded nut 1. A threaded post 51 protrudes from the end of the connecting rod 5 near the pre-embedded nut 1 and can be threaded to the inner wall of the threaded hole 21. When it is necessary to connect the connecting rod 5 to the connecting screw 2, it is only necessary to thread the threaded post 51 to the connecting rod 5. The hanging hole 321 allows the connecting rod 5 to pass through so that the connecting piece 3 can be attached to the connecting rod 5.

[0032] Reference Figure 3 and Figure 4 When the hanging ring 32 is attached to the connecting rod 5, in order to prevent the hanging ring 32 from detaching from the end of the connecting rod 5 away from the connecting screw 2, in some embodiments of this application, a plurality of anti-detachment components 6 are also included. The plurality of anti-detachment components 6 are distributed circumferentially around the rotation axis, and the rotation axis is collinear with the central axis of the connecting rod 5. Preferably, in this disclosure, there are two anti-detachment components 6, and the two anti-detachment components 6 are evenly distributed circumferentially around the rotation axis. The anti-detachment component 6 includes a rotating rod 61 having a first free end 611 and a first rotating end 612, and a stop block 62 protruding from the first free end 611 of the rotating rod 61; the rotating rod 61 is located on the side of the connecting rod 5 away from the connecting screw 2; the first rotating end 612 of the rotating rod 61 is hinged to the end of the connecting rod 5 away from the connecting screw 2 by a first torsion spring 63, so that the rotating rod 61 can be adjusted between a first retracted posture and a first open posture. When the rotating rod 61 is in the first retracted posture, the first torsion spring 63 has a force that drives the rotating rod 61 to rotate from the first retracted posture to the first open posture; the rotating rod 61 is perpendicular to the rotation axis along the rotation axis of the connecting rod 5. The stop block 62 protrudes from the side of the rotating rod 61 away from the axis of rotation. The stop block 62 has a stop surface 621 and a guide surface 622. The stop surface 621 is located on the side of the stop block 62 close to the connecting screw 2, and the guide surface 622 is located on the side of the stop block 62 away from the connecting screw 2. The guide surface 622 is inclined towards the side away from the axis of rotation in the direction from the first free end 611 to the first rotating end 612. In use, by moving the hanging ring 32, the rotating rod 61 can be driven from the first expanding posture to the first contracting posture by the pushing action of the inner wall of the hanging ring 32 against the guide surface 622. After the hanging ring 32 moves to the point of separation from the stop block 62, the first torsion spring 63 can drive the rotating rod 61 to rotate from the first contracting posture to the first opening posture. When the rotating rod 61 is in the first open position, the orthographic projection of the stop surface 621 in the first direction extends to the outside of the orthographic projection of the connecting rod 5 in the first direction, and at this time, the stop surface 621 is inclined to the side away from the axis of rotation in the direction from the first free end 611 to the first rotation. Therefore, when the hanging ring 32 is separated from the stop block 62, the hanging ring 32 will overlap the connecting rod 5 under the action of gravity, so that the stop block 62 can prevent the hanging ring 32 from falling off the connecting rod 5.

[0033] Reference Figure 5 and Figure 6 In some embodiments of this application, an auxiliary stop component 7 is also included. Each anti-detachment component 6 is connected to an auxiliary stop component 7. The auxiliary stop component 7 includes an auxiliary stop rod 71 with one end being a second free end 711 and the other end being a second rotating end 712, and a limiting block 72 fixedly connected to the stop surface 621 on the stop block 62. The auxiliary stop lever 71 is located on the side of the stop block 62 near the pre-embedded nut 1. The second rotating end 712 of the auxiliary stop lever 71 is hinged to the stop block 62 through the second torsion spring 73, so that the auxiliary stop lever 71 can be adjusted between the second retracted posture and the second expanded posture. When the auxiliary stop lever 71 is in the second retracted posture, the second torsion spring 73 has a force that drives the auxiliary stop lever 71 to rotate from the second retracted posture to the second expanded posture. The auxiliary stop lever 71 is parallel to the rotation axis of the stop block 62 along the rotation axis of the connecting rod 5.

[0034] The connection point between the second rotating end 712 and the stop block 62 is located on the stop surface 621. The second rotating end 712 is located on the side of the limiting block 72 close to the rotation axis, so that the limiting block 72 can limit the rotation range of the auxiliary stop rod 71.

[0035] Reference Figure 5 and Figure 6When the auxiliary stop lever 71 is in the second expanded posture, the side wall of the auxiliary stop lever 71 away from the rotation axis abuts against the limiting block 72. The auxiliary stop lever 71 is inclined towards the side away from the rotation axis in the direction from the first free end 611 to the first rotating end 612. The angle between the auxiliary stop lever 71 and the rotation axis is less than 90°. When the auxiliary stop lever 71 is in the second expanded posture, the orthographic projection of the second free end 711 of the auxiliary stop lever 71 in the first direction is located outside the orthographic projection of the connecting rod 5 in the first direction, so the auxiliary stop lever 71 can prevent the hanging ring 32 from disengaging from the connecting rod 5. When the hanging ring 32 needs to be attached to the connecting rod 5, the hanging ring 32 is moved. The hanging ring 32 first pushes multiple rotating rods 61 to move towards the side that is closer to each other. Then, the hanging ring 32 pushes multiple auxiliary stops 71 to move towards the side that is closer to each other. When the hanging ring 32 separates from the auxiliary stops 71, the hanging ring 32 will be attached to the connecting rod 5 under the action of gravity. Since there is an angle between the auxiliary stop rod 71 and the rotating rod 61, when using different models of hanging rings 32, in order to prevent the hanging ring 32 from separating from the auxiliary stop rod 71 and entering the angle between the auxiliary stop rod 71 and the rotating rod 61, thus causing the hanging ring 32 to separate from the connecting rod 5, in some embodiments of this application, the limiting block 72 is a telescopic rod with a locking bolt. After adjusting the limiting block 72 to the required length, the length of the limiting block 72 is fixed with the locking bolt. Therefore, by adjusting the limiting block 72 to different lengths, the auxiliary stop rod 71 can be limited to different positions to change the angle between the auxiliary stop rod 71 and the connecting rod 5, thereby adapting to the installation requirements of different models of hanging rings 32.

[0036] Reference Figure 5 and Figure 6 When selecting the model of the hanging ring 32, the smaller the gap between the inner wall of the hanging ring 32 and the outer wall of the connecting rod 5, the more stable the hanging ring 32 will be. Therefore, in order to allow the hanging ring 32 with the same inner diameter as the outer diameter of the connecting rod 5 to be fitted onto the connecting rod 5, in some embodiments of this application, the outer wall of the end of the connecting rod 5 away from the connecting screw 2 is provided with a relief groove for accommodating the auxiliary stop rod 71. When both the rotating rod 61 and the auxiliary stop rod 71 are in the retracted posture, the orthographic projection of the stop surface 621 in the first direction and the orthographic projection of the auxiliary stop rod 71 in the first direction are both located inside the orthographic projection of the connecting rod 5 in the first direction.

[0037] Reference Figure 7To further prevent the hanging ring 32 from shaking, some embodiments of this application also include a limiting pin 8. The limiting pin 8 is detachably connected to the connecting rod 5. Specifically, the outer peripheral wall of the connecting rod 5 has multiple limiting holes 53, which are spaced apart in the first direction. The limiting pin 8 is threadedly connected to the connecting rod 5 in the limiting hole 53. By connecting the limiting pin 8 to different limiting holes 53, the distance between the limiting pin 8 and the auxiliary stop rod 71 can be changed. After the limiting pin 8 is installed, when the limiting pin 8 contacts the end of the hanging ring 32 near the pre-embedded nut 1, the hanging ring 32 can be clamped between the limiting pin 8 and the auxiliary stop rod 71, thereby improving the stability of the hanging ring 32.

[0038] The implementation principle of a reusable wall tie in this application embodiment is as follows: after passing the hanging ring 32 through the rotating rod 61 and the auxiliary stop rod 71 in sequence, it is hung on the connecting rod 5. Then, the limiting pin 8 is connected to the connecting rod 5, so that the hanging ring 32 can be fixed to the connecting rod 5.

[0039] This application also discloses a method for fixing external scaffolding. The method for fixing external scaffolding includes the following steps: S1: Connect the connecting screw to the pre-embedded nut to fix the wall tie to the wall; S2: Move the hanging ring so that it is hooked onto the connecting rod; S3: Erect the external scaffolding, and pass the steel pipes in the external scaffolding through the first through hole on the connector, and insert the limit pin into the corresponding limit hole; If you need to replace the steel pipes and connectors that overlap the wall ties, simply press the auxiliary stop assembly and anti-detachment assembly toward the axis of rotation, and then detach the hanging ring from the auxiliary stop assembly and anti-detachment assembly.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A reusable wall tie, characterized in that, include: Pre-embedded nut (1); A connecting screw (2), which is detachably threaded to the pre-embedded nut (1); and A connector (3) is installed on the connecting screw (2), and the connector (3) has a first through hole (31) for accommodating the steel pipe. The connecting screw (2) is detachably connected to a connecting rod (5) on the side away from the pre-embedded nut (1), and the connecting rod (5) is set parallel to the connecting screw (2); the connecting piece (3) is detachably installed on the connecting rod (5), and a hanging ring (32) with a hanging hole (321) is fixedly connected to the side wall of the connecting piece (3), and the hanging ring (32) is used for the connecting rod (5) to pass through; It also includes multiple anti-detachment components (6), which are circumferentially distributed around a rotation axis, the rotation axis being collinear with the central axis of the connecting rod (5); each anti-detachment component (6) includes: A rotating rod (61) having a first free end (611) and a first rotating end (612), wherein the first rotating end (612) of the rotating rod (61) is elastically hinged to the connecting rod (5) by a first torsion spring (63) so that the rotating rod (61) can be adjusted between a first retracted posture and a first open posture, wherein the rotating rod (61) is perpendicular to the rotation axis along the rotation axis of the connecting rod (5); as well as A stop block (62) protrudes from the first free end (611) of the rotating rod (61). The stop block (62) extends toward the side away from the rotation axis. The end face of the stop block (62) near the first rotating end (612) is a stop surface (621). When the rotating rod (61) is in the first retracted posture, the hanging hole (321) allows the rotating rod (61) to pass through; When the rotating rod (61) is in the first open position, the stop surface (621) can contact the end of the hanging ring (32) away from the pre-embedded nut (1) to prevent the hanging ring (32) from disengaging from the rotating rod (61) during the process of moving towards the side away from the pre-embedded nut (1).

2. A reusable wall tie according to claim 1, characterized in that, Also includes: An embedded sleeve (4) having a second through hole (41) that communicates with the screw hole of the embedded nut (1); One end of the pre-embedded sleeve (4) is fixedly connected to the pre-embedded nut (1), and the other end extends toward the side of the connector (3). The second through hole (41) of the pre-embedded sleeve (4) coincides with the central axis of the pre-embedded nut (1).

3. A reusable wall tie according to claim 2, characterized in that, The pre-embedded sleeve (4) is a plastic sleeve.

4. A reusable wall tie according to claim 1, characterized in that, The stop block (62) has a guide surface (622), which is located at one end of the stop block (62) away from the pre-embedded nut (1), and the guide surface (622) is located on the side of the stop block (62) away from the axis of rotation; The guide surface (622) is inclined toward the side away from the axis of rotation in the direction from the first free end (611) to the first rotating end (612).

5. A reusable wall tie according to claim 4, characterized in that, It also includes an auxiliary stop component (7), with each of the anti-detachment components (6) correspondingly connected to an auxiliary stop component (7), the auxiliary stop component (7) comprising: An auxiliary stop (71) has a second free end (711) at one end and a second rotating end (712) at the other end. The auxiliary stop (71) is located on the side of the stop block (62) near the pre-embedded nut (1). The second rotating end (712) of the auxiliary stop (71) is elastically hinged to the stop block (62) by a second torsion spring (73) so that the auxiliary stop (71) can be adjusted between a second retracted posture and a second open posture. The auxiliary stop (71) is parallel to the rotation axis of the rotating rod (61) on which the stop block (62) is mounted along the hinge axis of the stop block (62) and along the rotation axis of the connecting rod (5). A limiting block (72) is fixedly connected to the stopping surface (621) of the stop block (62), and the second rotating end (712) is located on the side of the limiting block (72) close to the rotation axis. When the auxiliary stop (71) is in the second open posture, the auxiliary stop (71) is tilted away from the rotation axis in the direction from the first free end (611) to the first rotating end (612), and the second free end (711) of the auxiliary stop (71) is located outside the orthogonal projection of the stop block (62) in the direction parallel to the rotation axis.

6. A reusable wall tie according to claim 5, characterized in that, The end of the connecting rod (5) away from the connecting screw (2) has a relief groove (52) for accommodating the auxiliary stop (71).

7. A method for fixing external scaffolding, using the wall ties described in any one of claims 1-6, characterized in that, Includes the following steps: S1: Thread the connecting screw (2) to the embedded nut (1) to fix the wall tie to the wall (01); S2: Move the hanging ring (32) so that the hanging ring (32) is attached to the connecting rod (5); S3: Erect the external scaffold and pass the steel pipes in the external scaffold through the first through hole (31) on the connecting piece (3).

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