Suspended ceiling structure for indoor assembly

Abstract

The suspended ceiling structure for indoor assembly comprises a plurality of top plates which are arranged on the same face in a spliced mode, side plates are fixedly arranged on the tops of the two opposite edges of each top plate, and a concave cavity is formed between every two adjacent top plates distributed in the width direction of the side plates; a filling piece is arranged on the inner side of the concave cavity, a first cross beam parallel to the filling piece is arranged above the side plate, and a connecting piece which penetrates through the filling piece and the side plate is inserted into the first cross beam in a threaded mode; the side plates are arranged on the side edges of the top plates, the adjacent side walls are in contact, and then the concave cavities are formed between the adjacent top plates; the filling piece is arranged in the concave cavity, meanwhile, the first cross beam is arranged above the concave cavity, the filling piece and the first cross beam can be connected through the connecting piece, the top plate is stably installed below the frame body, convenience is provided for disassembling the filling piece and the top plate according to requirements, the situation that an existing suspended ceiling buckle plate is installed in an inserted mode, and the gap between every two adjacent buckle plates is small is changed; and the disassembly by non-professional personnel is not facilitated.

Description

Technical Field

[0001] The present invention relates to the field of suspended ceilings, and specifically to a suspended ceiling structure for indoor assembly. Background Art

[0002] In indoor decoration projects, the suspended ceiling structure with buckle plates inserted into keels is the mainstream form for current home and commercial space suspended ceilings. This structure forms a flat and beautiful suspended ceiling surface by accurately snapping the buckle plates into the keel slots, and at the same time can effectively hide the top pipelines and equipment, meeting the spatial function and visual requirements.

[0003] However, this traditional suspended ceiling structure has many significant drawbacks. The buckle plates and keels are tightly inserted and matched, and the gap between adjacent buckle plates is extremely narrow, usually only in the range of 1 - 3 millimeters. This narrow gap becomes a huge obstacle in scenarios such as pipeline maintenance and equipment maintenance that require the removal of buckle plates. Taking a conventional disassembly tool, a flat-head screwdriver, as an example, its width is greater than the gap between the buckle plates, making it difficult to smoothly insert and apply force. During the actual operation, users will find themselves in an extremely embarrassing situation. Due to the narrow space, the movement range of the tool is strictly limited. Each attempt to apply force requires repeated angle adjustment, consuming time and effort, and the probability of final disassembly failure is quite high.

[0004] More critically, for ordinary family members lacking operation experience, the process of self-removing the buckle plates is full of risks. When attempting to operate, tools such as screwdrivers are extremely likely to slip due to uneven force or improper user operation methods. Once the tool slips, its sharp metal blade will directly act on the surface of the buckle plate like a sharp knife, causing irreparable scratches, pits and other damages. These damages not only seriously damage the overall beauty of the suspended ceiling, making its originally flat and smooth surface become mottled, but may even cause damage to the buckle plate structure, such as deformation of the internal support structure and cracking of the buckle plate edge. As a result, the costs of later maintenance and replacement will increase significantly, including the costs of purchasing new buckle plates and related installation materials, as well as the labor costs of hiring professionals for installation. Summary of the Invention

[0005] The purpose of the present invention is to provide a suspended ceiling structure for indoor assembly, aiming to improve the problem that it is inconvenient for non-professionals to disassemble the buckle plates of the suspended ceiling and the keels.

[0006] The present invention is implemented as follows: A ceiling structure for indoor assembly includes multiple top plates spliced on the same plane. At the top of the two opposite edges of each top plate, side plates are fixedly arranged. A concave cavity is formed between adjacent top plates distributed along the width direction of the side plates; a filling member is arranged inside the concave cavity, and a first cross beam parallel to the filling member is arranged above the side plates. A connecting member passing through the filling member and the side plates is threadedly inserted into the first cross beam; the length of the first cross beam is greater than the length of the filling member, and both ends of multiple first cross beams are connected to the top plates. The top plates are arranged on the top of wall tiles, and the wall tiles are pasted on the wall.

[0007] Preferably, the length of the filling member is equal to the length of the side plate. On the opposite upper and lower side walls of the filling member, orifices with different diameters are arranged. The connecting member is arranged through the orifices, and the top of the connecting member is threadedly inserted into the threaded hole of the first cross beam.

[0008] Preferably, the height of the filling member is less than the depth of the concave cavity, and a paste layer is laid on the lower side surface of the filling member. The paste layer is flush with the bottom surface of the top plate to form a decorative surface.

[0009] Preferably, a second cross beam is arranged at the junction of the top plate and the wall tile. The second cross beam includes a first cross beam and a decorative plate. The decorative plate is installed at the edge below the first cross beam, and a support plate is fixedly arranged on the side wall of the decorative plate; the decorative plate is located in the gap formed by the top plate and the wall tile, and the side plate extends into the gap between the support plate and the first cross beam.

[0010] Preferably, a second pressing mechanism is arranged at the end of the top plate. The second pressing mechanism includes a pressing disc, a stud and a sleeve. The pressing disc is arranged in contact with the wall. The stud is fixedly installed on the side of the pressing disc away from the wall, and a nut is threadedly sleeved on the stud. The sleeve is sleeved on the stud, and the nut is arranged in contact with the end of the sleeve close to the pressing disc.

[0011] Preferably, a connecting plate is fixedly arranged on the side of the sleeve, and a fourth sliding block is fixedly arranged at the bottom of the connecting plate. A sliding groove is arranged on the upper side surface of the top plate, and a through hole is arranged on the side wall of the sliding groove. The fourth sliding block is installed in the sliding groove through a bolt connection.

[0012] Preferably, a first pressing mechanism is vertically arranged between two top plates. The first pressing mechanism includes a splicing pipe, an adjusting device and two end pipes. A sleeve frame is fixedly arranged below the splicing pipe. One end of the two end pipes close to each other respectively passes through the sleeve frame, and the adjusting device is located in the gap formed by the two end pipes. At the same time, a second plug post is inserted at one end of the two end pipes away from each other. A third sliding block is fixedly arranged on the side of the second plug post, and the third sliding block is installed in the sliding groove of the top plate.

[0013] Preferably, the adjusting device includes an internally threaded tube, two first inserting posts and a threaded rod. One ends of the two symmetrically arranged threaded rods close to each other are threadedly inserted into the internally threaded tube. The two first inserting posts are respectively installed at the other ends of the two threaded rods away from each other, and the two first inserting posts are respectively inserted into the two end tubes.

[0014] Preferably, a connecting mechanism is provided at the end of each first cross beam. The connecting mechanism includes a vertical plate, a connecting column and a fitting plate. The fitting plate and the connecting column are distributed on both sides of the vertical plate. An inserting plate installed at the end of the connecting column is inserted into the strip hole of the vertical plate, and a threaded column installed on the inserting plate penetrates through the fitting plate. At the same time, a nut is threadedly sleeved at the end of the threaded column.

[0015] Preferably, a second sliding block is fixedly provided below the connecting column, and the second sliding block is installed in the sliding groove of the top plate; a first sliding block is fixedly provided at the bottom of the vertical plate, and the first sliding block is installed in the sliding groove of the first cross beam.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. In the present invention, side plates are provided on the sides of the top plates, and adjacent side walls are in contact, so that a concave cavity is formed between adjacent top plates; a filling member is arranged in the concave cavity, and a first cross beam is arranged above the concave cavity. The filling member and the first cross beam can be connected through a connecting member, so that the top plate is stably installed below the frame body, and it is convenient to disassemble the filling member and the top plate according to requirements, changing the current situation that the existing ceiling ceiling boards are inserted and installed, and the gaps between adjacent ceiling boards are small, which is not conducive to non-professional personnel to disassemble.

[0018] 2. The height of the filling member in the present invention is less than the depth of the concave cavity, and a paste layer is provided at the bottom of the filling member. The paste layer can cover the pores of the filling member, and the paste layer and the top plate form a decorative surface, reducing the influence of the existence of the pores on the aesthetics.

[0019] 3. The top beam provided in the present invention is installed above the wall tile, and a second pressing mechanism is provided at the end of the top beam. At the same time, a first pressing mechanism is provided between the two top beams. With the cooperation of the two pressing mechanisms, the top beam is stably installed relative to the wall, and then the first cross beam is stably installed through the connection mechanism, eliminating the step of drilling and embedding bolts for the installation of the frame body, and correspondingly improving the installation efficiency. Brief Description of the Drawings

[0020] Figure 1 is the overall structural schematic diagram of the present invention;

[0021] Figure 2 is the structural schematic diagram of the present invention and the installation environment;

[0022] Figure 3 is the structural schematic diagram of the top plate splicing of the present invention;

[0023] Figure 4 It is a schematic structural diagram of the top plate of the present invention;

[0024] Figure 5 It is a schematic structural diagram of the frame body of the present invention;

[0025] Figure 6 It is a schematic structural diagram of the second cross beam of the present invention;

[0026] Figure 7 It is a schematic structural diagram of the first cross beam and the filling member of the present invention;

[0027] Figure 8 It is a schematic structural diagram of the top plate of the present invention;

[0028] Figure 9 It is a schematic structural diagram of the first pressing mechanism of the present invention;

[0029] Figure 10 It is a partial schematic structural diagram of the end pipe of the present invention;

[0030] Figure 11 It is a schematic structural diagram of the connecting mechanism of the present invention;

[0031] Figure 12 It is a schematic structural diagram of the second pressing mechanism of the present invention;

[0032] Figure 13 It is a schematic structural diagram of the top plate, the first cross beam and the filling member of the present invention;

[0033] Figure 14 It is a schematic structural diagram of the top plate and the second cross beam of the present invention.

[0034] In the figure: 1. Wall; 11. Wall tile; 2. Top plate; 21. Concave cavity; 22. Side plate; 3. First cross beam; 31. Threaded hole; 4. Second cross beam; 41. Decorative plate; 42. Support plate; 5. Filling member; 51. Connecting piece; 52. Adhesive layer; 6. Connecting mechanism; 61. Vertical plate; 62. Slot; 63. Fitting plate; 64. First sliding block; 65. Connecting column; 66. Insertion plate; 67. Second sliding block; 68. Threaded column; 7. Top beam; 71. Through hole; 8. First pressing mechanism; 81. End pipe; 82. Internal threaded pipe; 83. Threaded rod; 84. First insertion post; 85. Splicing pipe; 86. Sleeve frame; 87. Second insertion post; 88. Third sliding block; 9. Second pressing mechanism; 91. Stud; 92. Nut; 93. Pressing disc; 94. Sleeve; 95. Connecting plate; 96. Fourth sliding block. Detailed implementation manners

[0035] In the present invention, unless otherwise clearly specified or limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The following will be further described in conjunction with the accompanying drawings and specific embodiments:

[0037] Embodiment 1

[0038] As Figure 1 shown, in order to facilitate non-professionals (such as family members) to disassemble the ceiling for corresponding repairs, the present embodiment provides a new ceiling structure. The ceiling structure includes a frame body and multiple top plates 2. The frame body is installed on the wall 1, and the multiple top plates 2 are spliced and arranged at the bottom of the frame body. At the same time, the top plates 2 and the frame body are connected by a connecting member 51. In addition, the connecting member 51 can be disassembled by non-professionals without damaging the top plates 2, changing the existing ceiling buckle plug-in installation, and the gap between adjacent buckles is small, which is not conducive to non-professional disassembly.

[0039] As Figure 3 , Figure 4 , Figure 7 shown, in order to achieve the above purpose, side plates 22 are fixedly arranged at the top of the two opposite edges of each top plate 2, and a concave cavity 21 is formed between the adjacent top plates 2 distributed along the width direction of the side plates 22. A filling member 5 is arranged inside the concave cavity 21, and a first cross beam 3 parallel to the filling member 5 is arranged above the side plates 22. The connecting member 51 passes through the side plates 22 and is threadedly inserted into the threaded hole 31 of the first cross beam 3. In this way, under the action of the connecting member 51, the stable connection between the filling member 5 and the first cross beam 3 can be realized, and then the side plates 22 are pressed to control the stable installation of the top plates 2 relative to the frame body.

[0040] As Figure 7 shown, the above-mentioned connecting member 51 is arranged as a column body with a T-shaped structure, and the connecting member 51 is arranged upside down. At the same time, a polygonal groove is arranged on the bottom surface of the connecting member 51, and a thread is arranged on the top of the connecting member 51. This setting can facilitate professionals and non-professionals to hold a multi-angle wrench and insert it into the polygonal groove to rotate the connecting member 51, providing support for realizing the connection between the filling member 5 and the first cross beam 3.

[0041] As Figure 13 shown, the length of the filling member 5 is equal to the length of the side plates 22, and holes with different diameters are arranged opposite to each other on the upper and lower side walls of the filling member 5, and the connecting member 51 passes through the holes.

[0042] To improve the aesthetics of the ceiling structure, the height of the filling member 5 is less than the depth of the concave cavity 21, and a pasting layer 52 is laid on the lower side surface of the filling member 5. The pasting layer 52 is spliced flush with the bottom surface of the top plate 2 to form a decorative surface.

[0043] As Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 、 Figure 14 shown, when the top plate 2 is arranged adjacent to the wall 1 without the need for cutting, in order to enhance the aesthetics between the top plate 2 and the wall tiles 11 installed on the wall 1, a second cross beam 4 is provided at the junction of the top plate 2 and the wall tiles 11. The second cross beam 4 includes a first cross beam 3 and a decorative plate 41. The decorative plate 41 is installed at the edge below the first cross beam 3, and a support plate 42 is fixedly arranged on the side wall of the decorative plate 41. During installation, the second cross beam 4 is arranged in contact with the wall tiles 11, and the decorative plate 41 is located in the gap formed by the top plate 2 and the wall tiles 11. The lower side surface of the decorative plate 41 is flush with the lower side surface of the top plate 2. At the same time, the side plate 22 extends into the gap between the support plate 42 and the first cross beam 3, so that the gap between the top plate 2 and the wall tiles 11 can be filled under the action of the second cross beam 4.

[0044] Embodiment 2

[0045] As Figure 5 shown, on the basis of Embodiment 1, in order to reduce the steps of pre-burying bolts by drilling holes in the wall 1 during the installation of the frame body, the frame body further includes two top beams 7. The top beams 7 are arranged at the top of the wall tiles 11, and the wall tiles 11 are pasted on the wall 1. In addition, to stably install the top beams 7 relative to the wall 1, a second pressing mechanism 9 is provided at the end of the top beams 7. With the cooperation of the top beams 7 and the two groups of second pressing mechanisms 9, the resistance of the top beams 7 moving relative to the wall 1 can be increased.

[0046] As Figure 12 shown, specifically, the second pressing mechanism 9 includes a pressing disc 93, a stud 91, and a sleeve 94. The pressing disc 93 is arranged in contact with the wall 1, and the side wall of the pressing disc 93 in contact with the wall 1 can be set as a concave-convex structure to increase the friction coefficient between it and the wall 1. The stud 91 is fixedly installed on the side of the pressing disc 93 away from the wall 1, and a nut 92 is threadedly sleeved on the stud 91. At the same time, the sleeve 94 is sleeved on the stud 91, and the nut 92 is arranged in contact with the end of the sleeve 94 adjacent to the pressing disc 93. Thus, when the sleeve 94 is stably installed relative to the top beam 7, the pressure between the pressing disc 93 and the wall 1 can be adjusted by rotating the nut 92.

[0047] As Figure 8 、 Figure 12As shown in the figure, in order to stably install the casing 94 on the top beam 7, a connecting plate 95 is fixedly arranged on the side of the casing 94, and a fourth sliding block 96 is fixedly arranged at the bottom of the connecting plate 95. A sliding groove is arranged on the upper side of the top beam 7, and through holes 71 are arranged on the side wall of the sliding groove. The fourth sliding block 96 is installed in the sliding groove through a bolt, and the bolt passes through the through hole 71 and the threaded groove of the fourth sliding block 96, so that the casing 94 can be stably installed above the top beam 7 under the cooperation of the fourth sliding block 96 and the sliding groove.

[0048] As Figure 5 , Figure 9 , Figure 10 As shown in the figure, in order to further enhance the stability of the installation of the top beam 7, a first pressing mechanism 8 is vertically arranged between the two top beams 7. The first pressing mechanism 8 includes a splicing pipe 85, an adjusting device and two end pipes 81. A sleeve frame 86 is fixedly arranged below the splicing pipe 85, and one end of each of the two end pipes 81 close to each other penetrates through the sleeve frame 86, restricting the two end pipes 81 to be stably installed on the same straight line. The adjusting device is located in the gap formed by the two end pipes 81, and it includes an internally threaded pipe 82, two first insertion posts 84 and a threaded rod 83. One end of each of the two symmetrically arranged threaded rods 83 close to each other is threadedly inserted into the internally threaded pipe 82, and the two first insertion posts 84 are respectively installed at the other ends of the two threaded rods 83 away from each other, and the two first insertion posts 84 are respectively inserted into the two end pipes 81. Therefore, the relative positions of the two end pipes 81 can be adjusted by rotating the internally threaded pipe 82, providing support for pressing the two top beams 7 by the two end pipes 81. In addition, a second insertion post 87 is inserted into one end of each of the two end pipes 81 away from each other, and a third sliding block 88 is fixedly arranged on the side of the second insertion post 87. The third sliding block 88 is installed in the sliding groove of the top beam 7, so that the end pipe 81 can be stably installed relative to the top beam 7 and press the top beam 7 against the wall.

[0049] As Figure 5 As shown in the figure, the two top beams 7 are respectively arranged at both ends of the first cross beam 3, and a plurality of groups of connecting mechanisms 6 are arranged on the side of each top beam 7. The number of the connecting mechanisms 6 is equal to the number of the first cross beams 3, and the top beam 7 and the first cross beam 3 are connected through the connecting mechanisms 6.

[0050] As Figure 11 As shown in the figure, specifically, the connecting mechanism 6 includes a vertical plate 61, a connecting column 65 and a fitting plate 63. The fitting plate 63 and the connecting column 65 are distributed on both sides of the vertical plate 61. A second sliding block 67 is fixedly arranged below the connecting column 65, and the second sliding block 67 is installed in the sliding groove of the top beam 7. A first sliding block 64 is fixedly arranged at the bottom of the vertical plate 61, and the first sliding block 64 is installed in the sliding groove of the first cross beam 3. Under the cooperation of the sliding block and the sliding groove, the stable connection between the vertical plate 61 and the first cross beam 3 can be realized, and the stable connection between the connecting column 65 and the top beam 7 can also be realized.

[0051] As Figure 11 shown, in addition, the insertion plate 66 fixedly installed at the end of the connecting column 65 is inserted into the strip hole 62 of the vertical plate 61, and the threaded column 68 installed on the insertion plate 66 penetrates through and fits the fitting plate 63. At the same time, a nut is threadedly sleeved at the end of the threaded column 68. When the nut is rotated, the pressure between the fitting plate 63 and the vertical plate 61 can be adjusted, which facilitates adjusting the position of the connecting column 65 relative to the vertical plate 61, and provides stable support for the connecting column 65 after the position is adjusted relative to the vertical plate 61. In order to make the fitting plate 63 and the vertical plate 61 more stably connected, an anti-slip layer can be provided on their mutually fitting side walls.

[0052] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A ceiling structure for indoor assembly, characterized in that, It includes splicing multiple top plates (2) arranged on the same plane. At the top of the two opposite edges of each top plate (2), side plates (22) are fixedly arranged. A concave cavity (21) is formed between adjacent top plates (2) distributed in the width direction of the side plates (22); a filling member (5) is arranged inside the concave cavity (21), and a first cross beam (3) parallel to the filling member (5) is arranged above the side plates (22). A connecting member (51) passing through the filling member (5) and the side plates (22) is threadedly inserted into the first cross beam (3); the length of the first cross beam (3) is greater than the length of the filling member (5), and both ends of multiple first cross beams (3) are commonly connected to a top beam (7). The top beam (7) is arranged at the top of the wall tiles (11), and the wall tiles (11) are pasted on the wall (1).

2. The ceiling structure for indoor assembly according to claim 1, characterized in that, The length of the filling member (5) is equal to the length of the side plates (22). At the opposite upper and lower side walls of the filling member (5), holes with different diameters are arranged. The connecting member (51) is arranged through the holes, and the top of the connecting member (51) is threadedly inserted into the threaded hole (31) of the first cross beam (3).

3. The ceiling structure for indoor assembly according to claim 2, characterized in that, The height of the filling member (5) is less than the depth of the concave cavity (21), and a paste layer (52) is laid on the lower side surface of the filling member (5). The paste layer (52) is flush with the bottom surface of the top plate (2) to form a decorative surface.

4. An indoor assembly ceiling structure according to claim 3, characterized in that, A second cross beam (4) is arranged at the junction of the top plate (2) and the wall tiles (11). The second cross beam (4) includes a first cross beam (3) and a decorative plate (41). The decorative plate (41) is installed at the edge below the first cross beam (3), and a support plate (42) is fixedly arranged on the side wall of the decorative plate (41); the decorative plate (41) is located in the gap formed by the top plate (2) and the wall tiles (11), and the side plates (22) extend into the gap between the support plate (42) and the first cross beam (3).

5. The ceiling structure for indoor assembly according to claim 1, characterized in that, A second pressing mechanism (9) is arranged at the end of the top beam (7). The second pressing mechanism (9) includes a pressing disc (93), a stud (91) and a sleeve (94). The pressing disc (93) is arranged in contact with the wall (1). The stud (91) is fixedly installed on the side of the pressing disc (93) away from the wall (1), and a nut (92) is threadedly sleeved on the stud (91). The sleeve (94) is sleeved on the stud (91), and the nut (92) is arranged in contact with the end of the sleeve (94) close to the pressing disc (93).

6. The ceiling structure for indoor assembly according to claim 5, characterized in that, A connecting plate (95) is fixedly arranged on the side of the sleeve (94), and a fourth sliding block (96) is fixedly arranged at the bottom of the connecting plate (95). A sliding groove is arranged on the upper side surface of the top beam (7), and through holes (71) are arranged on the side wall of the sliding groove. The fourth sliding block (96) is installed in the sliding groove through a bolt connection.

7. An indoor assembly ceiling structure according to claim 6, characterized in that, A first pressing mechanism (8) is vertically arranged between the two top beams (7). The first pressing mechanism (8) includes a splicing pipe (85), an adjusting device, and two end pipes (81). A sleeve frame (86) is fixedly arranged below the splicing pipe (85). One end of each of the two end pipes (81) close to each other penetrates through the sleeve frame (86), and the adjusting device is located in the gap formed by the two end pipes (81). At the same time, a second plug post (87) is inserted into each of the two ends of the two end pipes (81) away from each other. A third sliding block (88) is fixedly arranged on the side of the second plug post (87), and the third sliding block (88) is installed in the sliding groove of the top beam (7).

8. An indoor assembly ceiling structure according to claim 7, characterized in that, The adjusting device includes an internally threaded pipe (82), two first plug posts (84), and a threaded rod (83). One end of each of the two symmetrically arranged threaded rods (83) close to each other is threadedly inserted into the internally threaded pipe (82). Two first plug posts (84) are respectively installed at the ends of the two threaded rods (83) away from each other, and the two first plug posts (84) are respectively inserted into the two end pipes (81).

9. The ceiling structure for indoor assembly according to claim 6, characterized in that, A connecting mechanism (6) is arranged at the end of each first cross beam (3). The connecting mechanism (6) includes a vertical plate (61), a connecting column (65), and a fitting plate (63). The fitting plate (63) and the connecting column (65) are distributed on both sides of the vertical plate (61). A plug board (66) installed at the end of the connecting column (65) is inserted into the slot hole (62) of the vertical plate (61), and a threaded column (68) installed on the plug board (66) penetrates through the fitting plate (63). At the same time, a nut (92) is threadedly sleeved at the end of the threaded column (68).

10. The ceiling structure for indoor assembly according to claim 9, characterized in that, A second sliding block (67) is fixedly arranged below the connecting column (65), and the second sliding block (67) is installed in the sliding groove of the top beam (7); a first sliding block (64) is fixedly arranged at the bottom of the vertical plate (61), and the first sliding block (64) is installed in the sliding groove of the first cross beam (3).

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