Combined partition wall
By using a modular partition wall structure, the height of the wall panels can be adjusted using screws and fasteners. Combined with fireproof boards and sealing strips, the problems of smoke diffusion and non-adjustable height of traditional walls are solved, achieving good flame-retardant, heat-insulating, and sound-insulating effects, and reducing the risk of cross-infection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN SANSHUI TONGJING BUILDING MATERIALS CO LTD
- Filing Date
- 2025-04-23
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional prefabricated walls allow smoke to spread rapidly during a fire, and the inability to adjust the height of integral partition walls leads to gaps in the assembly and air circulation, affecting sound insulation performance and increasing the risk of cross-infection.
The modular partition wall structure includes a top plate, partition wall panels, and a lifting groove. The height of the wall panels can be adjusted by the cooperation of screws and fasteners. Fireproof boards and sealing strips are used to improve the flame retardant, heat insulation and sound insulation performance.
It effectively prevents the spread of smoke, adjusts the wall height to accommodate floor differences, reduces assembly gaps and air circulation, improves sound insulation, and reduces the risk of cross-infection.
Smart Images

Figure CN224148939U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of partition wall panels, and more particularly to a modular partition wall. Background Technology
[0002] In today's ever-evolving construction industry, prefabricated wall systems are widely used in various building projects due to their advantages such as short construction cycles and industrialized production. They can divide a room into several smaller spaces according to different needs. For hospitals, partition walls can increase the number of wards and improve space utilization, allowing for free movement and communication among patients while ensuring privacy within the partitioned spaces.
[0003] Traditional prefabricated walls are typically constructed from relatively simple panels and frames. Adjacent walls are connected by direct end-to-end butt joints, usually without any special interlocking structure. Therefore, in the event of a fire, the walls deform due to heat, creating an unobstructed, straight channel between adjacent walls. At this point, smoke generated by the high temperature can easily and rapidly diffuse through these gaps. The smoke not only travels in a straight line through these internal wall gaps but also spreads into various spaces within the building, significantly hindering safe evacuation and fire rescue operations.
[0004] Furthermore, most partition walls currently used on the market are monolithic structures, which cannot be adjusted according to the floor height of hospital buildings. Slight discrepancies may exist between different areas on the same floor, resulting in assembly gaps between the top of the partition wall and the ceiling after installation, reducing sound insulation performance. Additionally, these assembly gaps allow air to circulate between the two partitions, leading to odor exchange, affecting patient comfort, and increasing the risk of cross-infection. Utility Model Content
[0005] The purpose of this utility model is to propose a modular partition wall. Through the splicing structure of the top plate and the partition wall panel, as well as the splicing structure between the partition wall panel and the lifting groove, smoke can be effectively blocked outside the wall, thereby effectively improving the flame-retardant and heat-insulating effect of the wall and solving the problem of poor smoke prevention effect of traditional walls. In addition, the lifting groove can adjust the relative height of the partition wall panel, solving the problem that the height of the existing integral structure partition wall cannot be adjusted.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] This utility model provides a combined partition wall, including a top plate, a partition wall panel, and a lifting groove;
[0008] The lifting trough includes an inverted groove, a concave-convex plate, several screws, and several first fixing components; the inverted groove is fixed to the ground, the concave-convex plate has a groove recessed downward along the X-axis direction, the groove is provided with through holes at intervals, and the through holes are arranged at intervals along the X-axis direction; the number of screws and first fixing components is matched with the number of through holes;
[0009] The concave-convex plate is embedded in the C-shaped trench, and the lower end of the screw passes through the through hole and abuts against the bottom of the C-shaped trench. The first fixing member is threadedly connected to the screw, and the bottom of the groove abuts against the first fixing member.
[0010] The partition wall panel has a fixed recess at its bottom, the lifting groove is embedded in the fixed recess, and the top surface of the convex plate is tightly against the bottom of the fixed recess; the upper end of the top plate is fixed to the ceiling, and the bottom of the top plate is tightly against the top of the partition wall panel.
[0011] The partition wall panel includes a partition wall frame and a fireproof wall panel. Fireproof wall panels are fixed on both sides of the partition wall frame in the X-axis direction. The fixing cavity is located at the bottom of the partition wall frame.
[0012] In the modular partition wall, the fireproof wall panel includes a first fireproof panel and a second fireproof panel. One side of the first fireproof panel is detachably connected to the partition wall frame, and the other side of the first fireproof panel is detachably connected to the second fireproof panel.
[0013] In the aforementioned modular partition wall, the partition wall frame includes a frame body, a socket bracket, a conduit, and two or more socket boxes. The fireproof wall panels are detachably installed on both sides of the frame body along the X-axis. The inner sides of the two fireproof wall panels and the frame body cooperate to form an accommodating space. The socket bracket, conduit, and socket boxes are respectively disposed in the accommodating space. The socket bracket is connected to the frame body. The socket box is fixed to the socket bracket, and the conduit connects adjacent socket boxes.
[0014] The fireproof wall panel located on the opening side of the socket box is provided with clearance holes, and the number and position of the clearance holes are adapted to the number and position of the socket box.
[0015] In the modular partition wall, the partition wall panel also includes thermal insulation material, which fills the accommodating space and wraps around the socket bracket, conduit and socket box.
[0016] In the combined partition wall, the top plate includes a top plate groove, a top plate frame, and a top plate fireproof board; the top of the top plate groove is fixedly connected to the ceiling, the groove opening faces downward, the top of the top plate frame is embedded in the top plate groove and is detachably connected to the top plate groove; the top plate fireproof board is fixed on both sides of the top plate frame in the X-axis direction.
[0017] In the combined partition wall, the bottom of the top plate is provided with a first sealing strip, and the top of the partition wall panel is provided with a second sealing strip. The first sealing strip has a fitting cavity on one side in the Y-axis direction, and the second sealing strip has a fitting protrusion that matches the position of the fitting cavity. The fitting protrusion is embedded in the fitting cavity, so that the first sealing strip and the second sealing strip are in contact with each other.
[0018] In the combined partition wall, the concave-convex plate has two recessed grooves, which are arranged side by side along the X-axis. Each groove has a through hole spaced apart, and a screw is inserted into each groove.
[0019] In the combined partition wall, the lifting groove also includes a second fixing member, the number of which is adapted to the number of through holes, the second fixing member is threadedly connected to the screw, and the second fixing member is tightly abutted against the bottom of the groove.
[0020] One of the technical solutions of this utility model can have the following beneficial effects:
[0021] The modular partition wall is equipped with a lifting groove. Through the cooperation of a screw and a first fixing member, the concave-convex plate is lifted from the U-shaped groove. Since the first fixing member is threaded to the screw, the height of the first fixing member relative to the screw can be adjusted according to the actual situation, thereby adjusting the height of the concave-convex plate relative to the U-shaped groove. The bottom of the partition wall panel is tightly pressed against the concave-convex plate, which can achieve the purpose of adjusting the overall height of the modular partition wall. Staff can make fine adjustments according to the floor height of the hospital building to avoid assembly gaps between the top of the partition wall and the roof, thereby avoiding a reduction in sound insulation and partition effect, preventing air circulation between the two partition spaces, and reducing the risk of cross-infection. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;
[0023] Figure 2 This is a cross-sectional schematic diagram of one embodiment of the present invention;
[0024] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;
[0025] Figure 4 yes Figure 2 A magnified view of a section at point B in the middle;
[0026] Figure 5 This is an exploded structural diagram of one embodiment of the present invention;
[0027] Figure 6 yes Figure 5 A magnified view of a section at point C;
[0028] In the attached diagram: 1. Top panel; 2. Partition wall panel; 3. Lifting and lowering channel;
[0029] Top plate groove 11, top plate frame 12, top plate fireproof board 13, first sealing strip 14; fixing cavity 20; partition wall frame 21; first fireproof board 22, second fireproof board 23, second sealing strip 24; C-shaped floor groove 31, concave-convex plate 32, screw 33, first fastener 34; second fastener 35;
[0030] Fitting cavity 141; frame body 211, socket bracket 212, conduit 213, socket base box 214; heat insulation material 215; fitting protrusion 241; groove 320. Detailed Implementation
[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0032] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis.
[0033] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0035] Please refer to Figures 1-6 This utility model provides a combined partition wall, including a top plate 1, a partition wall panel 2, and a lifting groove 3;
[0036] The lifting trough 3 includes an inverted groove 31, a concave-convex plate 32, a plurality of screws 33, and a plurality of first fixing members 34; the inverted groove 31 is fixed to the ground, the concave-convex plate 32 has a groove 320 recessed downward along the X-axis direction, the groove 320 is provided with through holes at intervals, and the through holes are arranged at intervals along the X-axis direction; the number of screws 33 and first fixing members 34 is matched with the number of through holes;
[0037] The concave-convex plate 32 is embedded in the C-shaped trench 31, the lower end of the screw 33 passes through the through hole and abuts against the bottom of the C-shaped trench 31, the first fixing member 34 is threadedly connected to the screw 33, and the bottom of the groove 320 abuts against the first fixing member 34.
[0038] The partition wall panel 2 has a fixed cavity 20 at its bottom, the lifting groove 3 is embedded in the fixed cavity 20, and the top surface of the concave-convex plate 32 is tightly against the bottom of the fixed cavity 20; the upper end of the top plate 1 is fixed to the ceiling, and the bottom of the top plate 1 is tightly against the top of the partition wall panel 2.
[0039] The partition wall panel 2 includes a partition wall frame 21 and a fireproof wall panel. Fireproof wall panels are fixed on both sides of the partition wall frame 21 in the X-axis direction. The fixing cavity 20 is provided at the bottom of the partition wall frame 21.
[0040] The modular partition wall is equipped with a lifting groove 3. Through the cooperation of the screw 33 and the first fixing member 34, the concave-convex plate 32 is lifted from the U-shaped groove 31. Since the first fixing member 34 is threaded to the screw 33, the height of the first fixing member 34 relative to the screw 33 can be adjusted according to the actual situation, thereby adjusting the height of the concave-convex plate 32 relative to the U-shaped groove 31. The bottom of the partition wall panel 2 is tightly pressed against the concave-convex plate 32, which can achieve the purpose of adjusting the overall height of the modular partition wall. Staff can make fine adjustments according to the floor height of the hospital building to avoid assembly gaps between the top of the partition wall and the roof, thereby avoiding a reduction in sound insulation and partition effect, preventing air circulation between the two partition spaces, and reducing the risk of cross-infection.
[0041] The modular partition wall comprises three components: a top panel 1, a partition wall panel 2, and a lifting channel 3. Its modular design facilitates transportation and on-site assembly. The lightweight components also aid in assembly, ensuring a secure and stable connection between the components after assembly. The fixing cavity 20 at the bottom of the partition wall panel 2 enhances the connection stability between the partition wall panel 2 and the lifting channel 3.
[0042] In specific implementation, the lifting trough 3 is provided with at least two screws 33 and at least two first fixing members 34; the groove 320 is provided with at least two through holes at intervals, one through hole is located at one end of the groove 320 and the other through hole is located at the other end of the groove 320, and the two screws 33 pass through the groove 320 through the through holes on the corresponding sides. Since both ends of the convex and concave plate 32 are fixed with screws 33, the convex and concave plate 32 can be lifted up as a whole, avoiding the instability of the center of gravity of the convex and concave plate 32 and the resulting tilting.
[0043] In practical applications, the lifting trough 3 has two through holes at each end, and 2 to 3 through holes are spaced apart between the two through holes. Therefore, the lifting trough 3 has at least 4 to 6 screws 33. By setting multiple screws 33, the overall weight can be distributed on the screws 33 at different positions, avoiding excessive load on the screws 33 due to excessive weight, which would damage the screws 33 and prevent the height adjustment from being achieved.
[0044] The partition wall frame 21 serves as the main frame for the partition wall panel 2, connecting the top plate 1 and the lifting groove 3, and providing an installation area for the fire-resistant wall panels. The fire-resistant wall panels are detachably connected to the partition wall frame 21 to enhance the fire resistance rating of the modular partition wall. In the event of a fire, the fire-resistant wall panels maintain the stability of the partition wall panel 2 structure, preventing collapse or damage due to high temperatures, reducing the spread of smoke and harmful gases, and inhibiting the spread of flames. Furthermore, the fire-resistant wall panels effectively prevent heat deformation of the wall during a fire, avoiding any impact on the safe evacuation of personnel and the conduct of fire rescue operations due to wall deformation.
[0045] Optionally, the fireproof wall panel includes a first fireproof panel 22 and a second fireproof panel 23. One side of the first fireproof panel 22 is detachably connected to the partition wall frame 21, and the other side of the first fireproof panel 22 is detachably connected to the second fireproof panel 23.
[0046] The above structure helps to improve the fire resistance and comfort of the modular partition wall, enhances sound insulation, reduces noise interference, and increases the strength and stability of the wall.
[0047] Specifically, the partition wall frame 21 includes a frame body 211, a socket bracket 212, a conduit 213, and two or more socket boxes 214. The fireproof wall panels are detachably installed on both sides of the frame body 211 in the X-axis direction. The inner sides of the two fireproof wall panels and the frame body 211 cooperate to form an accommodating space. The socket bracket 212, the conduit 213, and the socket boxes 214 are respectively disposed in the accommodating space. The socket bracket 212 is connected to the frame body 211. The socket boxes 214 are fixed to the socket bracket 212. The conduit 213 connects adjacent socket boxes 214.
[0048] The fireproof wall panel located on the opening side of the socket box 214 is provided with clearance holes, and the number and position of the clearance holes are adapted to the number and position of the socket box 214.
[0049] A socket bracket 212 is provided on the frame body 211. The socket bracket 212 is used to fix the socket box 214, while the conduit 213 is used to connect two adjacent socket boxes 214. With the above structure, the partition wall frame 21 is provided with a socket installation position, providing a power access point on the wall, which is convenient for subsequent connection of medical electrical equipment.
[0050] The conduit 213 helps protect the safety of the wire connections, preventing wires from being exposed and reducing potential safety hazards such as wire damage and leakage. The wires can enter from the side wall of the frame body 211 and into the socket box 214.
[0051] Specifically, the partition wall panel 2 also includes a heat insulation material 215, which fills the accommodating space and wraps around the socket bracket 212, the conduit 213 and the socket box 214.
[0052] With the above structure, the thermal insulation material 215 is filled in the accommodating space, which can effectively reduce heat transfer and maintain a stable indoor temperature. Moreover, the thermal insulation material 215 has a certain sound insulation performance, which can effectively reduce the intrusion of external noise and the leakage of indoor sound, providing a quieter environment for residents or employees.
[0053] In one specific embodiment of this utility model, the heat insulation material 215 is specifically rock wool.
[0054] Specifically, the top plate 1 includes a top plate groove 11, a top plate frame 12, and a top plate fireproof board 13; the top of the top plate groove 11 is fixedly connected to the ceiling, the groove opening of the top plate groove 11 faces downward, the top of the top plate frame 12 is embedded in the top plate groove 11, and is detachably connected to the top plate groove 11; the top plate fireproof board 13 is fixed on both sides of the top plate frame 12 in the X-axis direction.
[0055] The structure of the top panel 1 can be referenced from that of the partition wall panel 2, but the height of the top panel 1 is less than that of the partition wall panel 2. The top panel frame 12 is the main frame of the top panel 1, used to connect the partition wall panel 2 and provide an installation area for the fire-resistant top panel board 13. The fire-resistant top panel board 13 is detachably connected to the top panel frame 12 to improve the fire resistance rating of the modular partition wall. In the event of a fire, the fire-resistant top panel board 13 can maintain the stability of the top panel 1 structure, prevent the top panel 1 from collapsing or being damaged due to high temperatures, reduce the spread of smoke and harmful gases, and prevent the spread of flames.
[0056] Specifically, the bottom of the top plate 1 is provided with a first sealing strip 14, and the top of the partition wall panel 2 is provided with a second sealing strip 24. The first sealing strip 14 has a fitting cavity 141 on one side in the Y-axis direction, and the second sealing strip 24 has a fitting protrusion 241 that matches the position of the fitting cavity 141. The fitting protrusion 241 is embedded in the fitting cavity 141, so that the first sealing strip 14 and the second sealing strip 24 are in contact with each other.
[0057] The first sealing strip 14 is fitted onto the bottom of the top plate 1 and fixed with bolts; the second sealing strip 24 is fitted onto the top of the partition wall panel 2 and fixed with bolts. The top plate 1 and the partition wall panel 2 are joined together by the first sealing strip 14 and the second sealing strip 24, which reduces the assembly gap, improves the sound insulation and partition effect, reduces the air circulation between the two partition spaces, and reduces the risk of cross-infection.
[0058] During installation, first install the lifting floor trough 3 and the top plate trough 11. Fix the U-shaped floor trough 31 to the floor with screws and fix the top plate trough 11 to the ceiling with screws. Then, embed the top plate frame 12 into the top plate trough 11 and fix it with screws. Install the fireproof top plate board 13 on the side of the top plate frame 12. Then install the first sealing strip 14 at the bottom of the top plate frame 12.
[0059] Then, the screw 33 is passed through the through hole, so that the lower end of the screw 33 is pressed against the bottom of the C-shaped trench 31; then the first fixing member 34 is threadedly connected to the screw 33, and the bottom of the groove 320 is pressed against the first fixing member 34, so that the concave and convex plates 32 are pushed up from the C-shaped trench 31.
[0060] Next, install the partition wall panel 2, install the fireproof wall material onto the partition wall frame 21, install the second sealing strip 24 onto the top of the partition wall panel 2, and then embed the fixing cavity 20 at the bottom of the partition wall panel 2 into the outer periphery of the lifting groove 3, so that the top surface of the convex plate 32 is tightly against the bottom of the fixing cavity 20. At the same time, embed the fitting protrusion 241 of the second sealing strip 24 into the fitting cavity 141 of the first sealing strip 14 to complete the installation.
[0061] The top plate 1 can be assembled on-site, thus allowing for adjustment of its overall height. Furthermore, before installing the partition wall panel 2, the height of the first fixing member 34 relative to the screw 33 can be adjusted according to the actual situation, thereby adjusting the height of the concave-convex plate 32 relative to the U-shaped ground groove 31. Through the cooperation of the top plate 1 and the lifting ground groove 3, the overall height of the modular partition wall can be adjusted.
[0062] Specifically, the concave-convex plate 32 has two recessed grooves 320, which are arranged side by side along the X-axis. Each groove 320 has a through hole spaced apart, and each groove 320 has a screw 33 inserted into it.
[0063] With the above structure, the two grooves 320 allow the concave and convex plates 32 to be lifted by the two rows of screws 33, distributing the overall weight across multiple screws 33 and preventing excessive load on the screws 33 from causing damage.
[0064] Preferably, the lifting groove 3 further includes a second fixing member 35, the second fixing member 35 being adapted to the number of through holes, the second fixing member 35 being threadedly connected to the screw 33, and the second fixing member 35 being tightly abutting against the bottom of the groove 320.
[0065] By adopting the above structure, the position of the concave-convex plate 32 is limited by the first fixing member 34 and the second fixing member 35, which prevents the concave-convex plate 32 from being directly removed from the U-shaped ground channel 31, thereby enhancing the structural stability of the lifting ground channel 3.
[0066] In one specific embodiment of this utility model, the first fixing member is a nut, and the second fixing member 35 is a pull stud nut.
[0067] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.
Claims
1. A modular partition wall, characterized in that, Includes the ceiling panel, partition wall panels, and lifting floor trough; The lifting trough includes an inverted groove, a concave-convex plate, several screws, and several first fixing components; the inverted groove is fixed to the ground, the concave-convex plate has a groove recessed downward along the X-axis direction, the groove is provided with through holes at intervals, and the through holes are arranged at intervals along the X-axis direction; the number of screws and first fixing components is matched with the number of through holes; The concave-convex plate is embedded in the C-shaped trench, and the lower end of the screw passes through the through hole and abuts against the bottom of the C-shaped trench. The first fixing member is threadedly connected to the screw, and the bottom of the groove abuts against the first fixing member. The partition wall panel has a fixed recess at its bottom, the lifting groove is embedded in the fixed recess, and the top surface of the convex plate is tightly against the bottom of the fixed recess; the upper end of the top plate is fixed to the ceiling, and the bottom of the top plate is tightly against the top of the partition wall panel. The partition wall panel includes a partition wall frame and a fireproof wall panel. Fireproof wall panels are fixed on both sides of the partition wall frame in the X-axis direction. The fixing cavity is located at the bottom of the partition wall frame.
2. The modular partition wall of claim 1, wherein, The fireproof wall panel includes a first fireproof panel and a second fireproof panel. One side of the first fireproof panel is detachably connected to the partition wall frame, and the other side of the first fireproof panel is detachably connected to the second fireproof panel.
3. The modular partition wall of claim 1, wherein, The partition wall frame includes a frame body, a socket bracket, a conduit, and two or more socket boxes. The fireproof wall panels are detachably installed on both sides of the frame body along the X-axis. The inner sides of the two fireproof wall panels and the frame body cooperate to form an accommodating space. The socket bracket, conduit, and socket boxes are respectively disposed in the accommodating space. The socket bracket is connected to the frame body. The socket box is fixed to the socket bracket, and the conduit connects adjacent socket boxes. The fireproof wall panel located on the opening side of the socket box is provided with clearance holes, and the number and position of the clearance holes are adapted to the number and position of the socket box.
4. The modular partition wall of claim 3, wherein, The partition wall panel also includes thermal insulation material, which fills the accommodating space and wraps around the socket bracket, conduit, and socket box.
5. The modular partition wall of claim 1, wherein, The top plate includes a top plate groove, a top plate frame, and a fireproof top plate board; the top of the top plate groove is fixedly connected to the ceiling, the groove opening faces downwards, the top of the top plate frame is embedded in the top plate groove and is detachably connected to the top plate groove; fireproof top plate boards are fixed on both sides of the top plate frame in the X-axis direction.
6. The modular partition wall of claim 1, wherein, The bottom of the top plate is provided with a first sealing strip, and the top of the partition wall panel is provided with a second sealing strip. The first sealing strip has a fitting cavity on one side in the Y-axis direction, and the second sealing strip has a fitting protrusion that matches the position of the fitting cavity. The fitting protrusion is embedded in the fitting cavity, so that the first sealing strip and the second sealing strip are in contact with each other.
7. The modular partition wall of claim 1, wherein The concave-convex plate has two recessed grooves, which are arranged side by side along the X-axis. Each groove has a through hole spaced apart, and a screw is inserted into each groove.
8. The modular partition wall of claim 1, wherein, The lifting trough also includes a second fixing member, which is adapted to the number of through holes. The second fixing member is threadedly connected to the screw and is tightly abutted against the bottom of the groove.