Inclined strut structure for prefabricated wall construction

Abstract

The utility model relates to the technical field of prefabricated wall construction, and discloses a diagonal bracing structure for prefabricated wall construction, which comprises a cement floor and a prefabricated wall panel, the inner wall of the cement floor is fixedly connected with an embedded steel ring, and the middle lower part and the middle upper part of the right side of the prefabricated wall panel are respectively provided with a mounting groove. Expansion bolts are arranged on the inner walls of the two mounting grooves, fixing retaining rings penetrate through the outer walls of the two expansion bolts, the left sides of the two fixing retaining rings are attached to the right side of the prefabricated wallboard, and connecting rings are connected to the right sides of the two fixing retaining rings and the top ends of the in-board ribs in a clamped mode. According to the utility model, the pre-embedded steel ring is arranged on the cement floor, and the threaded cylinder, the inclined support rod and the threaded head are used for connection and adjustment, so that the stable support of the prefabricated wallboard is realized, the construction quality and the safety are improved, and the prefabricated wallboard has the characteristics of simplicity in installation and small occupied space, and can exert the optimal efficiency in a narrow space.

Description

TECHNICAL FIELD

[0001] The utility model relates to prefabricated wall construction technical field especially relates to a prefabricated wall construction is with inclined strut structure. BACKGROUND

[0002] With the rise and development of fabricated building, prefabricated wall is widely used in modern building construction, in order to ensure the construction quality, ensure that the wall is stable and reliable, after the installation of prefabricated wall, often need to set up temporary support system to resist external load, there are many types of temporary support device on the market, the common traditional steel pipe scaffold support and hydraulic pole support.

[0003] Traditional steel pipe scaffold support although cost is low, but the erection efficiency is low, inconvenient adjustment, hydraulic pole support has good adjustment performance, can quickly adapt to different height demand, however, its cost is relatively high, for some small and medium-sized projects is not economic and applicable, in addition, no matter which way has high installation complexity, occupies large space and so on problem, when in narrow site construction, it is difficult to play the best performance.

[0004] The existing prefabricated wall temporary support system generally has problems of complex structure, heavy weight, difficult to carry and the like, especially in high-rise building construction, these shortcomings are more prominent, in addition, the traditional support system often lacks sufficient adjustment function, resulting in limited application range. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortage, the utility model provides a prefabricated wall construction is with inclined strut structure, aims at improving the existing prefabricated wall temporary support system generally has problems of complex structure, heavy weight, difficult to carry and the like, and often lacks sufficient adjustment function, resulting in limited application range.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a prefabricated wall construction is with inclined strut structure, including cement floor and prefabricated wallboard, the inner wall of cement floor is fixedly connected with embedded steel ring, the right side middle lower part and middle upper part of prefabricated wallboard are all provided with installation groove, the inner wall of two installation grooves is all provided with expansion bolt, the outer wall of two expansion bolts is all penetrated through fixed buckle, the left side of two fixed buckles is all attached to the right side of prefabricated wallboard, the right side of two fixed buckles is all connected with connecting ring, the adjacent one end of multiple connecting rings is all fixedly connected with threaded cylinder, the adjacent between multiple threaded cylinders is all provided with inclined strut, the far away one end of two inclined struts is all fixedly connected with threaded head, the thread of two threaded heads of left end and two threaded heads of right end is opposite state, multiple threaded heads are respectively connected with multiple threaded cylinders, the inner wall of cement floor is provided with horizontal bottom plate support mechanism.

[0007] Through the technical scheme, the pre-embedded steel ring is arranged on the cement floor, and the threaded cylinder, the inclined support rod and the threaded head are connected and adjusted, so that stable support of the prefabricated wall plate is realized, the inclined support rod can be adjusted to keep the prefabricated wall plate vertical during construction, and the construction quality and safety are improved.

[0008] As a further description of the above technical scheme:

[0009] The horizontal bottom plate support mechanism comprises a pre-embedded part, the pre-embedded part penetrates the inner wall of the cement floor, the bottom end of the pre-embedded part is fixedly connected with a plane pull plate, the outer wall of the plane pull plate is fixedly connected with a hoisting formwork, a demolding plate is arranged between the hoisting formwork and the adjacent cement floor, a lifting hole is arranged at the top end of the pre-embedded part, and the lifting hole and the connecting ring are interlocked.

[0010] Through the technical scheme, the pre-embedded part penetrates the cement floor to connect the plane pull plate and the hoisting formwork, the demolding plate is used for convenient separation, the lifting hole and the connecting ring are interlocked, the horizontal bottom plate support mechanism and other parts of the inclined support structure are connected, stable horizontal support is provided for the whole structure, and the stability and safety of the prefabricated wall plate during installation and use are ensured, and the construction quality is improved.

[0011] As a further description of the above technical scheme:

[0012] The inner wall of the cement floor penetrates a plurality of plate inner ribs, and the plurality of plate inner ribs are respectively attached to the top wall of the pre-embedded steel ring and the plane pull plate.

[0013] Through the technical scheme, the plate inner rib penetrates the inner wall of the cement floor and is respectively attached to the top wall of the pre-embedded steel ring and the plane pull plate, plays a role in enhancing the structural strength of the cement floor, and can better connect the pre-embedded steel ring and the plane pull plate with the cement floor, thereby improving the stability and integrity of the whole structure.

[0014] As a further description of the above technical scheme:

[0015] A plurality of anti-skid strips are fixedly connected to the front and rear sides of the outer wall of the expansion bolt, and the inclination angles of the plurality of anti-skid strips on the front side and the rear side are opposite.

[0016] Through the technical scheme, the plurality of anti-skid strips are arranged on the front and rear sides of the outer wall of the expansion bolt, and the inclination angles of the anti-skid strips on the front side and the rear side are opposite, so that the friction between the expansion bolt and the prefabricated wall plate is increased, the expansion bolt is prevented from loosening during use, and the firmness of the connection between the fixing buckle and the prefabricated wall plate is ensured.

[0017] As a further description of the above technical scheme:

[0018] The outer wall of the two fixing buckles is provided with a plurality of fixing welding points.

[0019] Through the above technical scheme: the plurality of fixing welding points of the outer wall of the fixing buckle are equidistantly arranged, which can enhance the structural strength of the fixing buckle itself, prevent the fixing buckle from being deformed or damaged when bearing the tensile force of the diagonal brace, and ensure the stability of the diagonal brace structure.

[0020] As a further description of the above technical scheme:

[0021] The outer shape of the diagonal brace is cylindrical, and the outer wall thereof is processed by sanding.

[0022] Through the above technical scheme: the diagonal brace is cylindrical in shape, which can make the force transmission more uniform and reduce stress concentration; the outer wall is processed by sanding, which can increase the friction force, facilitate the operation during installation and adjustment, and improve the stability of connection with other components.

[0023] As a further description of the above technical scheme:

[0024] The top end of the embedded steel ring is designed in a circular arc, and the whole embedded steel ring is designed in a convex shape.

[0025] Through the above technical scheme: the circular arc design of the top end of the embedded steel ring can prevent sharp corners from damaging other components, and the convex design of the whole embedded steel ring can increase the contact area and connection strength with the cement floor, better bear the tensile force from the diagonal brace structure, and ensure the stable support of the prefabricated wall panel.

[0026] As a further description of the above technical scheme:

[0027] The right end of the two fixing buckles is designed in a circular arc, and the whole fixing buckle is designed in a symmetrical shape.

[0028] Through the above technical scheme: the circular arc design of the right end of the fixing buckle can reduce the wear of the connecting ring and other components, and the symmetrical design of the whole fixing buckle can make the stress more uniform, improve the stability and reliability of the fixing buckle when connecting the prefabricated wall panel and the diagonal brace structure.

[0029] The utility model has the advantages of the following beneficial effects:

[0030] 1、The utility model discloses a cement floor embedded steel ring diagonal brace structure, including cement floor, embedded steel ring, diagonal brace and fixing buckle, the cement floor is provided with the embedded steel ring, the embedded steel ring is provided with the diagonal brace, and the diagonal brace is provided with the fixing buckle.

[0031] 2. The utility model discloses, through embedded part penetrates cement floor connection plane pull plate and hoist formwork, utilize the release formwork convenient separation, the lifting hole is combined with the connecting ring, realized horizontal bottom plate support mechanism and other parts of inclined bracing structure connection, provide stable horizontal support for whole structure, guarantee prefabricated wallboard installation and use in -process stability and security, promote construction quality. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 The structure diagram of the inclined bracing rod of the inclined bracing structure for prefabricated wall construction is provided for the utility model;

[0033] Figure 2 The structure diagram of the embedded part of the inclined bracing structure for prefabricated wall construction is provided for the utility model;

[0034] Figure 3 The structure diagram of the embedded steel ring of the inclined bracing structure for prefabricated wall construction is provided for the utility model;

[0035] Figure 4 The structure diagram of the fixed welding point of the inclined bracing structure for prefabricated wall construction is provided for the utility model;

[0036] Figure 5 The structure diagram of the fixed welding point of the inclined bracing structure for prefabricated wall construction is provided for the utility model; Figure 1 The structure of A in the figure is enlarged.

[0037] Legend:

[0038] 1, cement floor, 2, horizontal bottom plate support mechanism, 201, embedded part, 202, plane pull plate, 203, hoist formwork, 204, release formwork, 205, lifting hole, 3, prefabricated wallboard, 4, embedded steel ring, 5, installation groove, 6, expansion bolt, 7, fixed buckle, 8, connecting ring, 9, threaded cylinder, 10, inclined bracing rod, 11, threaded head, 12, inboard muscle, 13, antiskid strip, 14, fixed welding point. DETAILED DESCRIPTION

[0039] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0040] Refer to Figure 1 , Figure 3 and Figure 4The utility model provides an embodiment: a kind of inclined strut structure for prefabricated wall construction, including cement floor 1 and prefabricated wallboard 3, the inner wall of cement floor 1 is fixedly connected with embedded steel ring 4, can enhance the connecting strength with other components, provide stable base support for inclined strut structure, the right side middle lower part and middle upper part of prefabricated wallboard 3 are all set with installation slot 5, provide position for the installation of expansion bolt 6, the inner wall of two installation slots 5 is all provided with expansion bolt 6, for fixing fixed snap ring 7, the outer wall of two expansion bolts 6 is all penetrated with fixed snap ring 7, connect prefabricated wallboard 3 with connecting ring 8, the left side of two fixed snap rings 7 is all attached in the right side of prefabricated wallboard 3, ensure the compactness of connection, the right side of two fixed snap rings 7 and the top of plate inner rib 12 are all clamped and connected with connecting ring 8, play the role of connecting each component, the adjacent end of multiple connecting rings 8 is all fixedly connected with threaded barrel 9, provide connecting interface for inclined strut 10, the adjacent between multiple threaded barrels 9 is all provided with inclined strut 10, and play the role of supporting prefabricated wallboard 3, the far away end of two inclined struts 10 is all fixedly connected with threaded head 11, the thread of left end two threaded heads 11 and right end two threaded heads 11 is opposite state, facilitate the length and angle of inclined strut 10 adjustment, multiple threaded heads 11 are respectively with multiple threaded barrels 9 screw connection, realize the detachable connection of component, the inner wall of cement floor 1 is provided with horizontal bottom plate support mechanism 2, provide horizontal direction support for entire structure;

[0041] Specifically, the cement floor 1 serves as a base support surface of the entire structure, a pre-buried steel ring 4 is fixedly connected to the inner wall of the cement floor 1, the pre-buried steel ring 4 serves to connect and fix other components, the prefabricated wallboard 3 is a main structure that needs to be supported, mounting grooves 5 are formed in the right middle lower part and the right middle upper part of the prefabricated wallboard 3, the mounting grooves 5 provide space for subsequent installation of other components, expansion bolts 6 are arranged on the inner walls of the two mounting grooves 5, the expansion bolts 6 can be fixedly arranged on the prefabricated wallboard 3, fixed clasp rings 7 penetrate the outer walls of the two expansion bolts 6, the left sides of the fixed clasp rings 7 are attached to the right side of the prefabricated wallboard 3, serving to connect and fix, connecting rings 8 are connected to the top ends of the plate inner ribs 12 on the right sides of the two fixed clasp rings 7, the connecting rings 8 connect various components together, threaded barrels 9 are fixedly connected to adjacent ends of the plurality of connecting rings 8, the threaded barrels 9 provide interfaces for connection of the inclined struts 10, the inclined struts 10 are arranged between adjacent ones of the plurality of threaded barrels 9, serving to support the prefabricated wallboard 3, threaded heads 11 are fixedly connected to distantly-arranged ends of the two inclined struts 10, the threads of the two threaded heads 11 on the left end and the two threaded heads 11 on the right end are in opposite states, such a design enables the threaded heads 11 to be threadedly connected to the threaded barrels 9, and the length and angle of the inclined struts 10 can be adjusted by rotating the threaded heads 11, thereby realizing stable support of the prefabricated wallboard 3, in the construction process, the length and angle of the inclined struts 10 can be adjusted to keep the prefabricated wallboard 3 in a vertical state, thereby improving construction quality and safety.

[0042] With reference to Figure 2 The horizontal bottom plate support mechanism 2 comprises a pre-buried part 201 penetrating the inner wall of the cement floor 1, serving to connect and fix other components, the bottom end of the pre-buried part 201 is fixedly connected to a planar pull plate 202, which can increase the contact area with the ground and improve stability, the outer wall of the planar pull plate 202 is fixedly connected to a hoisting formwork 203, facilitating hoisting operations, the hoisting formwork 203 and the cement floor 1 are provided with a demolding plate 204 between adjacent ones, facilitating demolding operations after construction is completed, the top end of the pre-buried part 201 is provided with a lifting hole 205, the lifting hole 205 and the connecting ring 8 are mutually engaged, so that the horizontal bottom plate support mechanism 2 can be connected together with other parts of the inclined strut structure;

[0043] Specifically, the embedded part 201 penetrates the inner wall of the cement floor 1, plays a role in connecting and fixing other components, the bottom end of the embedded part 201 is fixedly connected with the plane pull plate 202, the plane pull plate 202 can increase the contact area with the bottom to improve the stability, the outer wall of the plane pull plate 202 is fixedly connected with the hoisting formwork 203, the hoisting formwork 203 and the adjacent cement floor 1 are provided with the demolding plate 204, the demolding plate 204 can conveniently separate the hoisting formwork 203 and the cement floor 1 after the construction is completed, the top end of the embedded part 201 is provided with the lifting hole 205, the lifting hole 205 and the connecting ring 8 are mutually clamped, so that the horizontal bottom plate supporting mechanism 2 can be connected together with other parts of the inclined bracing structure of the prefabricated wall construction, and jointly play a role, in the construction process, the horizontal bottom plate supporting mechanism 2 provides stable horizontal support for the entire structure, ensures the stability and safety of the prefabricated wall panel 3 in the installation and use process.

[0044] With reference to Figure 2 , Figure 4 and Figure 5 , the inner wall of the cement floor 1 penetrates a plurality of plate inner ribs 12, the plurality of plate inner ribs 12 are respectively attached to the top wall of the embedded steel ring 4 and the plane pull plate 202, which can enhance the structural strength of the cement floor 1 and improve the stability of the entire structure, the outer wall of the two expansion bolts 6 is fixedly connected with a plurality of anti-skid strips 13 on the front and back sides, the inclination angles of the front and back sides of the plurality of anti-skid strips 13 are opposite, which can increase the friction between the expansion bolt 6 and the prefabricated wall panel 3, prevent the expansion bolt 6 from loosening, and the outer wall of the two fixed clasp rings 7 is provided with a plurality of fixed welding points 14, the plurality of fixed welding points 14 are equidistantly arranged, which can enhance the structural strength of the fixed clasp ring 7, making it more firm and reliable during connection;

[0045] Specifically, the plate inner rib 12 penetrates the inner wall of the cement floor 1 and is respectively attached to the top wall of the embedded steel ring 4 and the plane pull plate 202, which plays a role in enhancing the structural strength of the cement floor 1, and can better connect the embedded steel ring 4 and the plane pull plate 202 with the cement floor 1, improving the stability and integrity of the entire structure, the plurality of anti-skid strips 13 arranged on the outer wall of the expansion bolt 6 on the front and back sides, the inclination angles of the front and back sides of the anti-skid strips 13 are opposite, which can increase the friction between the expansion bolt 6 and the prefabricated wall panel 3, prevent the expansion bolt 6 from loosening during use, and ensure the firmness of the connection between the fixed clasp ring 7 and the prefabricated wall panel 3, the plurality of fixed welding points 14 on the outer wall of the fixed clasp ring 7 are equidistantly arranged, these fixed welding points 14 can enhance the structural strength of the fixed clasp ring 7 itself, making it not easy to deform or be damaged when bearing the tension of the inclined bracing rod 10, and ensuring the stability of the inclined bracing structure.

[0046] With reference to Figure 1 and Figure 4The outer wall of the diagonal brace 10 is cylindrical, and the cylindrical design can make the force transmission more uniform and reduce stress concentration. The frosting process can increase friction and facilitate installation and adjustment. The top of the embedded steel ring 4 adopts an arc design, and the embedded steel ring 4 adopts a convex design as a whole. The arc design can avoid damage to other components caused by sharp edges and corners. The convex design can increase the contact area and connection strength with the cement floor 1. The right ends of the two fixing buckles 7 are both arc-shaped. The two fixing buckles 7 are symmetrically designed as a whole. The arc design on the right end can reduce wear on components such as the connecting ring 8. The symmetrical design can make the force more uniform and improve the stability of the fixing buckle 7 during the connection process.

[0047] Specifically, the diagonal brace rod 10 has a cylindrical shape. The cylindrical design can make the force transmission more uniform and reduce stress concentration. The frosted process on the outer wall can increase friction, facilitate operation during installation and adjustment, and also improve the stability of connection with other components. The top of the embedded steel ring 4 adopts an arc design to avoid damage to other components caused by sharp edges. The overall convex design can increase the contact area and connection strength with the cement floor 1, better withstand the tension from the diagonal brace structure, and ensure the stable support of the prefabricated wall panel 3. The right end of the fixing buckle 7 adopts an arc design to reduce wear on components such as the connecting ring 8. The overall symmetrical design can make the force more uniform, thereby improving the stability and reliability of the fixing buckle 7 when connecting the prefabricated wall panel 3 and the diagonal brace structure.

[0048] Working principle: The cement floor 1 serves as the basic supporting surface of the entire structure. The inner wall of the cement floor 1 is fixedly connected with an embedded steel ring 4. The embedded steel ring 4 plays the role of connecting and fixing other components. The prefabricated wall panel 3 is the main structure that needs to be supported. Installation grooves 5 are provided in the middle lower part and the middle upper part of the right side of the prefabricated wall panel 3. The installation grooves 5 provide space for the subsequent installation of other components. The inner walls of the two installation grooves 5 are provided with expansion bolts 6, which can be firmly fixed to the prefabricated wall panel 3. The outer walls of the two expansion bolts 6 are penetrated by fixing buckles 7. The left side of the fixing buckle 7 fits on the right side of the prefabricated wall panel 3, which plays the role of connection and fixing. The right side of the two fixing buckles 7 is in contact with the reinforcement inside the board The tops of the two connecting rings 12 are all engaged with the connecting rings 8, which connect the various components together. The adjacent ends of the multiple connecting rings 8 are fixedly connected with the threaded cylinders 9. The threaded cylinders 9 provide an interface for the connection of the diagonal bracing rods 10. The diagonal bracing rods 10 are arranged between the adjacent multiple threaded cylinders 9. The diagonal bracing rods 10 play the role of supporting the prefabricated wall panels 3. The two diagonal bracing rods 10 are fixedly connected with the threaded heads 11 at the ends away from each other. The threads of the two threaded heads 11 at the left end and the two threaded heads 11 at the right end are in opposite states. This design allows the threaded heads 11 to be threadedly connected to the threaded cylinders 9. By rotating the threaded heads 11, the length and angle of the diagonal bracing rods 10 can be adjusted, thereby achieving stable support for the prefabricated wall panels 3.

[0049] And, the embedded part 201 is through the inner wall of the cement floor 1, plays a role in connecting and fixing other components, the bottom end of the embedded part 201 is fixedly connected with the plane pull plate 202, the plane pull plate 202 can increase the contact area with the bottom, improve the stability, the outer wall of the plane pull plate 202 is fixedly connected with the hoisting formwork 203, the hoisting formwork 203 is provided with the demolding plate 204 between the adjacent cement floor 1, the demolding plate 204 can conveniently separate the hoisting formwork 203 from the cement floor 1 after construction is completed, the top end of the embedded part 201 is provided with the lifting hole 205, the lifting hole 205 and the connecting ring 8 are mutually clamped, so that the horizontal bottom plate support mechanism 2 can be connected together with other parts of the inclined strut structure for prefabricated wall construction, and jointly play a role.

[0050] Finally, it should be noted that: the above only for the preferred embodiments of the utility model have described, and not for limiting the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. that is made within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A diagonal bracing structure for prefabricated wall construction, comprising a cement floor (1) and a prefabricated wall panel (3), characterized in that: The inner wall of the cement floor (1) is fixedly connected with a pre-buried steel ring (4), the middle lower part and the middle upper part of the right side of the prefabricated wall panel (3) are both provided with a mounting groove (5), the inner walls of the two mounting grooves (5) are both provided with expansion bolts (6), the outer walls of the two expansion bolts (6) are both penetrated by a fixing buckle (7), the left sides of the two fixing buckles (7) are both attached to the right side of the prefabricated wall panel (3), and the right sides of the two fixing buckles (7) are both engaged with the top of the inner reinforcement (12) of the board with a connecting ring (8), Adjacent ends of the connecting rings (8) are fixedly connected to threaded cylinders (9), adjacent ends of the plurality of threaded cylinders (9) are provided with diagonal support rods (10), and ends of two diagonal support rods (10) that are away from each other are fixedly connected to threaded heads (11), the threads of the two threaded heads (11) at the left end and the two threaded heads (11) at the right end are in opposite states, and the plurality of threaded heads (11) are respectively threadedly connected to the plurality of threaded cylinders (9), and the inner wall of the cement floor (1) is provided with a horizontal bottom plate support mechanism (2).

2. The diagonal bracing structure for prefabricated wall construction according to claim 1, characterized in that: The horizontal bottom plate support mechanism (2) comprises an embedded part (201), the embedded part (201) penetrates the inner wall of the cement floor (1), the bottom end of the embedded part (201) is fixedly connected to a flat pull plate (202), the outer wall of the flat pull plate (202) is fixedly connected to a hanging template (203), a stripping template (204) is provided between the hanging template (203) and the cement floor (1), and a hanging hole (205) is provided at the top end of the embedded part (201), and the hanging hole (205) and the connecting ring (8) are engaged with each other.

3. The diagonal bracing structure for prefabricated wall construction according to claim 1, characterized in that: A plurality of in-plate ribs (12) penetrate the inner wall of the cement floor (1), and the plurality of in-plate ribs (12) are respectively attached to the top wall of the embedded steel ring (4) and the flat pull plate (202).

4. The diagonal bracing structure for prefabricated wall construction according to claim 1, characterized in that: A plurality of anti-slip strips (13) are fixedly connected to the front and rear sides of the outer walls of the two expansion bolts (6), and the inclination angles of the plurality of anti-slip strips (13) on the front side and the plurality of anti-slip strips (13) on the rear side are opposite.

5. The diagonal bracing structure for prefabricated wall construction according to claim 1, characterized in that: The outer walls of the two fixing buckles (7) are provided with a plurality of fixing welding points (14), and the plurality of fixing welding points (14) are arranged at equal distances.

6. The diagonal bracing structure for prefabricated wall construction according to claim 1, characterized in that: The diagonal support rod (10) has a cylindrical shape, and its outer wall is frosted.

7. The diagonal bracing structure for prefabricated wall construction according to claim 1, characterized in that: The top end of the embedded steel ring (4) adopts an arc design, and the entire embedded steel ring (4) adopts a convex design.

8. The diagonal bracing structure for prefabricated wall construction according to claim 1, characterized in that: The right ends of the two fixing buckles (7) are both designed in an arc shape, and the entirety of the two fixing buckles (7) are both designed in a symmetrical manner.

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