Quick-release cast-in-place stone wall connecting mechanism

Abstract

The utility model discloses a quick detach type cast-in-situ stone wall connecting mechanism relates to concrete pouring auxiliary technical field, including connecting assembly, and connecting assembly includes connecting sheet metal, spacing piece and square steel pipe, and the both ends of connecting sheet metal all are provided with spacing notch, and two square steel pipes are sequentially provided with outer wall form, heat preservation wall, wall steel bar and inner wall steel formwork. The utility model discloses a connecting sheet metal passes through with horizontal state to pass through the inside of square steel pipe, outer wall form, heat preservation wall, wall steel bar and inner wall steel formwork, when will two spacing pieces respectively be inserted in the inside of two spacing notches on a connecting sheet metal, make spacing piece right angle edge close -fitting square steel pipe's surface after, can press two square steel pipes in the inside and outside surface of the wall that will be formed, is favorable to directly constructs the insulation board in the final wall inside directly, and then realized the function of saving process, construction material, improves construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of concrete pouring auxiliary technology, and in particular to a quick-release connection mechanism for cast-in-place stone walls. Background Technology

[0002] Concrete pouring refers to the construction process of pouring concrete into a formwork until it hardens, primarily used in civil engineering projects. This process uses slag silicate cement, along with fine sand, aggregate, and pumping agents. Before construction, preparatory work such as operator training is required. The pouring process includes cleaning the formwork, layered vibration, and continuous segmented operation. Beams and slabs are constructed simultaneously using the "grouting method," while stairs are poured continuously from bottom to top.

[0003] Formwork is a temporary support structure, manufactured according to design requirements, to shape concrete structures and components according to specified positions and geometric dimensions, maintain their correct position, and bear the self-weight of the formwork and external loads acting on it. The purpose of formwork engineering is to ensure the quality and safety of concrete engineering, accelerate construction progress, and reduce project costs. Formwork structures used in cast-in-place concrete structure construction mainly consist of three parts: panels, supporting structures, and connectors. The panels are the load-bearing plates that directly contact the freshly poured concrete; the supporting structures are temporary structures that support the panels, concrete, and construction loads, ensuring the formwork structure is firmly assembled and does not deform or break; connectors are the fittings that connect the panels and supporting structures into a whole.

[0004] Existing building formwork mainly uses two methods to assist in the shaping of the wall to be poured: external support of the inner and outer wall formwork and tensioning of the inner and outer wall formwork. However, in the process of pouring and shaping the wall, it is difficult to directly install insulation boards on the wall surface to achieve the effect of improving the reliability between the insulation board and the wall by means of concrete setting. Therefore, we propose a quick-release cast-in-place stone wall connection mechanism. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a quick-release cast-in-place stone wall connection mechanism, which solves the technical problem that existing building formwork makes it difficult to directly install insulation boards on the wall surface, thereby improving the reliability between the insulation board and the wall through concrete setting.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A quick-release cast-in-place stone wall connection mechanism includes a connection component, the connection component includes a connection iron plate, both ends of the connection iron plate are provided with limit slots, limit components are inserted into the two limit slots, and square steel pipes are sleeved on the outside of both ends of the connection iron plate.

[0010] An outer wall formwork, an insulation wall, wall reinforcement, and an inner wall steel formwork are sequentially arranged between the two square steel pipes. The wall reinforcement is located between the insulation wall and the inner wall steel formwork. The inner wall steel formwork is supported by one square steel pipe. The outer wall formwork is located on the side of the insulation wall away from the wall reinforcement and is supported by another square steel pipe.

[0011] The connecting iron plate passes horizontally through the interior of the square steel pipe, the outer wall formwork, the insulation wall, the wall reinforcement and the inner wall steel formwork. The two limiting members inserted into the connecting iron plate have right-angled trapezoidal cross sections, and the right-angled sides of the limiting members are in close contact with the surface of the square steel pipe.

[0012] Preferably, the insulation wall is formed by splicing multiple insulation boards in a vertical plane, and the exterior wall template is formed by splicing multiple natural stones in a vertical plane; the connecting iron sheet passes between two adjacent insulation boards or two adjacent natural stones.

[0013] Preferably, male tenons are integrally formed on two adjacent sides of the multiple natural stones constituting the exterior wall template, and female tenons are provided on the remaining two adjacent sides of the multiple natural stones constituting the exterior wall template; the male and female tenons on two adjacent natural stones on the top and bottom, left and right sides are adapted to be connected.

[0014] Preferably, each of the multiple natural stones constituting the exterior wall template has three iron pin holes on its top, and the three iron pin holes extend upward to the tenon, with the connecting iron plate being movably connected inside the iron pin holes.

[0015] Preferably, positioning slots are provided on both sides of the middle part of the connecting iron sheet, and a limiting pin is inserted into the inside of the positioning slot. The two ends of the limiting pin are respectively inserted into the pin holes of the iron sheet and into the interior of two adjacent natural stones.

[0016] Preferably, the connecting iron sheet has multiple adaptable slots at its long edge, and the wall reinforcement is movably connected inside the adaptable slots.

[0017] Preferably, the four sides of the surface of the multiple natural stones constituting the exterior wall template away from the insulation wall are provided with exterior wall grouting grooves, and the interior of two adjacent exterior wall grouting grooves is filled with grout.

[0018] Preferably, the limiting component includes a limiting block with a right-angled trapezoidal cross-section. The top of the limiting block has a movable slot, and the interior of the movable slot is provided with a lever hinged to the limiting block. A handle is welded to the top surface of the lever away from the square steel pipe.

[0019] Preferably, the lever arm has a mounting slot in the middle, and a V-shaped spring is provided inside the mounting slot. A vertical rod is welded to the bottom surface of the inner side of the V-shaped spring, passing through its top and maintaining a movable connection with it. A trapezoidal locking block is sleeved on the top of the vertical rod. The bottom side of the V-shaped spring facing the square steel pipe is bent into a plate. Multiple slots are provided on the side of the square steel pipe facing away from the outer wall template. The plate is assembled and fixed to the lever arm. The trapezoidal locking block is slidably connected inside the mounting slot, and its bottom surface is supported by the top of the V-shaped spring. The end of the trapezoidal locking block away from the lever arm is inserted into the slot.

[0020] (III) Beneficial Effects

[0021] 1. By using a connecting iron plate that passes horizontally through the square steel pipe, external wall formwork, insulation wall, wall reinforcement, and internal wall steel formwork, and then inserting two limiting pieces into the two limiting slots on a connecting iron plate, so that the right-angled edges of the limiting pieces are in close contact with the surface of the square steel pipe, the two square steel pipes can be pressed against the inner and outer surfaces of the wall to be formed. During the subsequent pouring of concrete between the internal wall steel formwork and the insulation wall, the wall reinforcement is used as the framework of the concrete wall, which can ensure the structural strength of the wall and facilitate the direct construction of insulation boards inside the final wall. This effectively solves the problem that it is difficult to directly construct insulation boards on the wall surface using building formwork, thereby improving the reliability between the insulation board and the wall through the setting of concrete. This achieves the functions of saving procedures and construction materials and improving construction efficiency.

[0022] When the limiting block is inserted into the limiting slot, the lever arm is controlled by the handle to approach the square steel pipe. After the trapezoidal block overcomes the resistance of the V-shaped spring and the end away from the lever arm is inserted into the slot, the limiting block can be restricted from exiting the limiting slot. This achieves the effect of the limiting block being stably inserted into the limiting slot, thereby achieving the effect of two square steel pipes supporting the concrete pouring outside the wall reinforcement to form a concrete wall through the inner wall steel formwork, the outer wall formwork and the iron plate pin hole.

[0023] By using the handle to control the tilt of the lever arm, the trapezoidal block overcomes the resistance of the V-shaped spring, causing the V-shaped spring to bend and deform. After the trapezoidal block exits from the slot, it uses the top edge of the side wall of the limiting slot as a fulcrum and relies on the lever principle to make the limiting component easily exit from the inside of the limiting slot to the top. Attached Figure Description

[0024] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0025] Figure 1 This is a structural diagram showing the installation position of a quick-release cast-in-place stone wall connection mechanism according to this utility model.

[0026] Figure 2 This is a right view of a quick-release cast-in-place stone wall connection mechanism according to the present invention.

[0027] Figure 3 This is an overall structural diagram of a quick-release cast-in-place stone wall connection mechanism according to this utility model;

[0028] Figure 4 This is a top view of the exterior wall formwork of a quick-release cast-in-place stone wall connection mechanism according to this utility model;

[0029] Figure 5 This is a front view of the exterior wall formwork of a quick-release cast-in-place stone wall connection mechanism according to this utility model;

[0030] Figure 6 This is a right view of the external wall formwork of a quick-release cast-in-place stone wall connection mechanism according to this utility model;

[0031] Figure 7 This is a schematic diagram showing the installation position of the limiting component of the quick-release cast-in-place stone wall connection mechanism according to this utility model.

[0032] Figure 8 This is a schematic diagram of the structure of the external wall formwork of a quick-release cast-in-place stone wall connection mechanism according to this utility model.

[0033] Legend: 1. Interior wall steel formwork; 2. Wall reinforcement; 3. Insulated wall; 4. Exterior wall formwork; 5. Iron plate pin hole; 6. Square steel pipe; 7. Connecting component; 701. Limiting component; 7011. Limiting block; 7012. Upright; 7013. V-shaped spring; 7014. Trapezoidal locking block; 7015. Handle; 7016. Lever arm; 7017. Plate; 702. Connecting iron plate; 703. Limiting pin; 8. Adaptive groove; 9. Positioning groove; 10. Limiting groove; 11. Female tenon; 12. Exterior wall grouting groove; 13. Male tenon; 14. Movable groove; 15. Locking groove; 16. Installation groove. Detailed Implementation

[0034] This application provides a quick-release cast-in-place stone wall connection mechanism, which solves the problem in the prior art that it is difficult to directly install insulation boards on the wall surface using building formwork, so as to improve the reliability between the insulation board and the wall by means of concrete setting.

[0035] Example 1

[0036] The technical solution in this application is to solve the above problems, and the overall approach is as follows:

[0037] To address the problems existing in the prior art, this utility model provides a quick-release connection mechanism for cast-in-place stone walls, such as... Figures 1 to 6 As shown, it includes a connecting component 7, which includes a connecting iron sheet 702. Both ends of the connecting iron sheet 702 are provided with limit slots 10. Limiting components 701 are inserted into the interior of both limit slots 10. Square steel pipes 6 are sleeved on the exterior of both ends of the connecting iron sheet 702.

[0038] Between the two square steel pipes 6, an outer wall formwork 4, an insulation wall 3, a wall reinforcement 2, and an inner wall steel formwork 1 are arranged in sequence. The two limiting pieces 701 inserted into the connecting iron plate 702 have right-angled trapezoidal cross sections.

[0039] The insulation wall 3 is made of multiple insulation boards spliced ​​together in a vertical plane, and the exterior wall formwork 4 is made of multiple natural stones spliced ​​together in a vertical plane;

[0040] The wall reinforcement 2 is located between the insulation wall 3 and the inner wall steel formwork 1. The inner wall steel formwork 1 is supported by a square steel pipe 6. The outer wall formwork 4 is located on the side of the insulation wall 3 away from the wall reinforcement 2 and is supported by another square steel pipe 6. By making the connecting iron plate 702 pass horizontally through the inside of the square steel pipe 6, the outer wall formwork 4, the insulation wall 3, the wall reinforcement 2 and the inner wall steel formwork 1, and by inserting the two limiting pieces 701 into the two limiting slots 10 on the connecting iron plate 702 respectively, and making the right-angled side of the limiting piece 701 close to the surface of the square steel pipe 6, the two square steel pipes 6 can be pressed on the inner and outer surfaces of the wall to be formed. This facilitates the direct construction of the insulation board inside the wall. The outer wall formwork 4 is used as the device material for the outer wall, which can save processes and construction materials and improve construction efficiency.

[0041] Secondly, to facilitate the combination of multiple natural stones constituting the exterior wall formwork 4 into a whole and improve overall performance, such as... Figures 4 to 6 As shown, the two adjacent sides of the multiple natural stones constituting the exterior wall template 4 are integrally formed with male tenons 13, and the remaining two adjacent sides of the multiple natural stones constituting the exterior wall template 4 are provided with female tenons 11. By adapting and connecting the male tenons 13 and female tenons 11 on the two adjacent natural stones on the top and bottom and left and right sides, steps between multiple natural stones in the vertical plane can be avoided, and multiple natural stones can be connected into a whole.

[0042] Furthermore, by having the connecting iron plate 702 pass through the space between two adjacent insulation boards or two adjacent natural stones, and by opening three iron plate pin holes 5 on the top of the multiple natural stones constituting the exterior wall template 4, so that the three iron plate pin holes 5 all extend upward to the tenon 13, and the connecting iron plate 702 is movably connected inside the iron plate pin holes 5, it is possible to avoid gaps between the two natural stones after the connecting iron plate 702 passes through the space between the two adjacent natural stones.

[0043] In some examples, positioning slots 9 are provided on both sides of the middle part of the connecting iron plate 702, and a limit pin 703 is inserted into the positioning slot 9.

[0044] In this way, by inserting the two ends of a limiting pin 703 into the iron plate pin hole 5 and connecting them to the interior of two adjacent natural stones, while the other limiting pin 703 is embedded in the outside of the concrete to be poured between the inner wall steel formwork 1 and the insulation wall 3, the outer wall formwork 4 and the insulation wall 3 concrete wall can be fixed together to prevent the outer wall formwork 4 and the insulation wall 3 from peeling off from the wall surface.

[0045] Secondly, by providing multiple adaptable slots 8 at the long edge of the connecting iron plate 702, and the wall reinforcement 2 being movably connected inside the adaptable slots 8, the vertical steel bars can be used to cooperate with the adaptable slots 8 on the connecting iron plate 702 during the process of binding or welding the wall reinforcement 2, thereby restricting the position of the wall reinforcement 2 between the inner wall steel formwork 1 and the insulation wall 3, so as to ensure that the wall reinforcement 2 is in the middle of the concrete to be poured.

[0046] Furthermore, the four sides of the surface of the multiple natural stones constituting the exterior wall template 4 away from the insulation wall 3 are provided with exterior wall grouting grooves 12. The interior of two adjacent exterior wall grouting grooves 12 is filled with grout. By filling the interior of the exterior wall grouting grooves 12 with grout, the appearance of the exterior wall template 4 when it is located on the exterior wall surface can be guaranteed.

[0047] Specifically, before pouring concrete, an inner wall steel formwork 1 is first erected on the ground, and wall reinforcement 2 is tied or welded to one side of the inner wall steel formwork 1. Then, on the side of the wall reinforcement 2 away from the inner wall steel formwork 1, insulation boards forming the insulation wall 3 and natural stone forming the outer wall formwork 4 are stacked vertically layer by layer. During this process, a connecting iron plate 702 is passed horizontally through the inside of the square steel pipe 6, the outer wall formwork 4, the insulation wall 3, the wall reinforcement 2, and the inner wall steel formwork 1. After the two limiting pieces 701 are respectively inserted into the two limiting slots 10 on a connecting iron plate 702, and the right-angled edge of the limiting piece 701 is pressed tightly against the surface of the square steel pipe 6, the two square steel pipes 6 can be pressed down. During the subsequent pouring of concrete between the inner wall steel formwork 1 and the insulation wall 3, the inner and outer surfaces of the formed wall are then constructed. The wall steel reinforcement 2 serves as the framework of the concrete wall, which ensures the structural strength of the wall and facilitates the direct installation of the insulation board inside the final wall. (In this state, the two ends of a limiting pin 703 on the connecting iron plate 702 are inserted into the pin holes 5 of the iron plate and connected to the interior of two adjacent natural stones. The other limiting pin 703 is embedded in the outside of the concrete to be poured between the inner wall steel formwork 1 and the insulation wall 3, which can fix the outer wall formwork 4 and the insulation wall 3 concrete wall together and prevent the outer wall formwork 4 and the insulation wall 3 from peeling off from the wall surface.)

[0048] Meanwhile, by using the male tenon 13 processed on the natural stone and the female tenon 11 cut on the natural stone, the integrity of the natural stone can be guaranteed during the splicing of multiple natural stones. The grouting groove 12 on the four sides of the surface of the outer wall template 4 away from the iron plate pin hole 5 is filled with sealant, which makes it easy to use the outer wall template 4 as the installation material of the outer wall, ultimately achieving the effect of saving process and construction materials and improving construction efficiency.

[0049] Example 2

[0050] Based on Example 1, the present application embodiment aims to ensure that the limiting member 701 is not easily loosened after being installed inside the limiting slot 10, and is easy to remove from inside the limiting slot 10. The overall idea is as follows:

[0051] like Figure 7 and Figure 8 As shown, the limiting member 701 includes a limiting plug 7011 with a right-angled trapezoidal cross section. The top of the limiting plug 7011 is provided with a movable slot 14. Inside the movable slot 14 is a lever arm 7016 that is hinged to the limiting plug 7011. A handle 7015 is welded to the top surface of the lever arm 7016 away from the square steel tube 6.

[0052] The lever arm 7016 has an installation slot 16 in the middle. A V-shaped spring piece 7013 is installed inside the installation slot 16. A vertical rod 7012 is welded to the bottom surface of the inner side of the V-shaped spring piece 7013, passing through its top and maintaining a movable connection with it. A trapezoidal clip 7014 (the cross section of the trapezoidal clip 7014 is a right trapezoid) is sleeved on the top of the vertical rod 7012. A plate 7017 is bent into shape on the side of the V-shaped spring piece 7013 facing the square steel pipe 6. Multiple slots 15 are opened on the side of the square steel pipe 6 facing away from the outer wall template 4.

[0053] In this way, by means of the lever arm 7016 hinged to the limiting insert 7011, when it is necessary to remove the limiting insert 7011 from the inside of the limiting slot 10, the lever arm 7016 is tilted by the handle 7015. With the top edge of the side wall of the limiting slot 10 as the fulcrum, the limiting member 701 can be easily removed from the inside of the limiting slot 10 to the top by relying on the lever principle.

[0054] Secondly, the trapezoidal locking block 7014 is slidably connected inside the mounting slot 16, and its bottom surface is supported by the top of the V-shaped spring piece 7013. By assembling and fixing the plate 7017 with the lever arm 7016, when the limiting plug 7011 is inserted into the limiting slot 10, the lever arm 7016 is controlled to approach the square steel tube 6 by the handle 7015, so that the trapezoidal locking block 7014 overcomes the resistance of the V-shaped spring piece 7013 (causing the V-shaped spring piece 7013 to bend and deform towards the bottom). When the end away from the lever arm 7016 is inserted into the slot 15, the limiting plug 7011 can be restricted from exiting the limiting slot 10.

[0055] In use, the limiting block 7011 is inserted into the inside of the limiting slot 10. The handle 7015 is used to control the lever arm 7016 to approach the square steel tube 6, so that the trapezoidal locking block 7014 overcomes the resistance of the V-shaped spring 7013 and causes the V-shaped spring 7013 to bend and deform (based on the pressure applied by the trapezoidal locking block 7014 to the bottom of the V-shaped spring 7013 when one end of the trapezoidal locking block 7014 extends into the slot 15). After the end of the trapezoidal locking block 7014 away from the lever arm 7016 is inserted into the inside of the slot 15, the limiting block 7011 can be prevented from exiting from the inside of the limiting slot 10.

[0056] Meanwhile, when it is necessary to remove the limiting block 7011 from the limiting slot 10, the lever arm 7016 is tilted by using the handle 7015, so that the trapezoidal locking block 7014 overcomes the resistance of the V-shaped spring 7013 and causes the V-shaped spring 7013 to bend and deform. After the trapezoidal locking block 7014 is removed from the slot 15, the limiting part 701 can be easily removed from the limiting slot 10 to the top by using the top edge of the side wall of the limiting slot 10 as a fulcrum and relying on the lever principle. It is simple and convenient.

[0057] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A quick-release cast-in-place stone wall connection mechanism, comprising a connection component (7), characterized in that: The connecting component (7) includes a connecting iron plate (702), both ends of which are provided with limiting slots (10), and both limiting slots (10) are inserted into the interior of each limiting slot (10). Both ends of the connecting iron plate (702) are fitted with square steel pipes (6). Between the two square steel pipes (6), an outer wall template (4), an insulation wall (3), a wall reinforcement (2), and an inner wall steel template (1) are arranged in sequence. The wall reinforcement (2) is located between the insulation wall (3) and the inner wall steel template (1). The inner wall steel template (1) is supported by a square steel pipe (6). The outer wall template (4) is located on the side of the insulation wall (3) away from the wall reinforcement (2) and is supported by another square steel pipe (6). The connecting iron plate (702) passes horizontally through the inside of the square steel pipe (6), the outer wall template (4), the insulation wall (3), the wall reinforcement (2) and the inner wall steel template (1). The two limiting members (701) inserted into the connecting iron plate (702) have right-angled trapezoidal cross sections, and the right-angled side of the limiting member (701) is in close contact with the surface of the square steel pipe (6).

2. The quick-release cast-in-place stone wall connection mechanism as described in claim 1, characterized in that: The insulation wall (3) is made of multiple insulation boards spliced ​​together in a vertical plane, and the exterior wall template (4) is made of multiple natural stones spliced ​​together in a vertical plane; The connecting iron sheet (702) passes between two adjacent insulation boards or two adjacent natural stones.

3. The quick-release cast-in-place stone wall connection mechanism as described in claim 2, characterized in that: The two adjacent sides of the multiple natural stones constituting the exterior wall template (4) are integrally formed with male tenons (13), and the remaining two adjacent sides of the multiple natural stones constituting the exterior wall template (4) are provided with female tenons (11). Among them, the male tenon (13) and female tenon (11) on two adjacent natural stones, one above and one below, and one to the left and right, are adapted to be connected.

4. The quick-release cast-in-place stone wall connection mechanism as described in claim 3, characterized in that: Each of the natural stone materials constituting the exterior wall template (4) has three iron plate pin holes (5) on its top. The three iron plate pin holes (5) extend to the top to the tenon (13). The connecting iron plate (702) is movably connected inside the iron plate pin holes (5).

5. The quick-release cast-in-place stone wall connection mechanism as described in claim 4, characterized in that: Positioning slots (9) are provided on both sides of the middle part of the connecting iron plate (702). A limiting pin (703) is inserted into the inside of the positioning slot (9). The two ends of the limiting pin (703) are respectively inserted into the pin holes (5) of the iron plate and into the interior of two adjacent natural stones.

6. The quick-release cast-in-place stone wall connection mechanism as described in claim 1, characterized in that: The connecting iron plate (702) has multiple adaptable slots (8) at its long edge, and the wall steel bars (2) are movably connected inside the adaptable slots (8).

7. The quick-release cast-in-place stone wall connection mechanism as described in claim 2, characterized in that: The four sides of the surface of the multiple natural stones constituting the exterior wall template (4) away from the insulation wall (3) are provided with exterior wall grouting grooves (12), and the interior of two adjacent exterior wall grouting grooves (12) is filled with grout.

8. The quick-release cast-in-place stone wall connection mechanism as described in claim 1, characterized in that: The limiting component (701) includes a limiting plug (7011) with a right-angled trapezoidal cross section. The top of the limiting plug (7011) is provided with a movable slot (14). Inside the movable slot (14) is a lever (7016) that is hinged to the limiting plug (7011). A handle (7015) is welded to the top surface of the lever (7016) away from the square steel pipe (6).

9. A quick-release cast-in-place stone wall connection mechanism as described in claim 8, characterized in that: The lever arm (7016) has a mounting slot (16) in the middle. A V-shaped spring (7013) is provided inside the mounting slot (16). A vertical rod (7012) is welded to the bottom surface of the inner side of the V-shaped spring (7013) and passes through its top and is movably connected to it. A trapezoidal clip (7014) is sleeved on the top of the vertical rod (7012). A plate (7017) is bent on the side of the bottom of the V-shaped spring (7013) facing the square steel pipe (6). The square steel pipe (6) has multiple slots (15) on the side facing away from the outer wall formwork (4); The plate (7017) is assembled and fixed with the lever arm (7016), the trapezoidal block (7014) is slidably connected to the inside of the mounting slot (16), and the bottom surface is supported by the top of the V-shaped spring (7013). The end of the trapezoidal block (7014) away from the lever arm (7016) is inserted into the inside of the slot (15).

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