Cable installation bridge for building roof facilitating bottom maintenance

Abstract

This invention relates to the field of cable installation technology, specifically to a cable tray for building roofs that facilitates bottom-level maintenance. It includes a top shell, a partition frame fixed to the bottom surface of the top plate of the top shell, an extension buckle plate slidably connected to the bottom of the partition frame, a connecting frame fixed to the bottom surface of the extension buckle plate, and a sealing plate rotatably connected to the bottom of the connecting frame. One end of the sealing plate is snapped onto a side plate of the top shell. A mounting bracket is fixed to the bottom surface of the top plate of the top shell, and insert plates are inserted into the side plates of the top shell. The advantages are: the cable tray for building roofs proposed in this invention, which facilitates bottom-level maintenance, inverts the traditional cable tray installation on the roof, thus reducing the distance between the cable tray and the roof, increasing the usable height of the interior space. Furthermore, the downward-facing slot of the top shell facilitates the maintenance of cables laid inside the top shell. Additionally, the interior of the top shell is equipped with a retractable extension buckle plate, and a support plate and pressure plate are added to the extension buckle plate to limit cable movement.

Description

Technical Field

[0001] The present invention relates to the technical field of cable installation, in particular to a cable installation bridge for building roofs that is convenient for maintenance from the bottom. Background Art

[0002] A cable is usually a rope-like cable twisted from several or several groups of conductors (at least two conductors in each group), each group of conductors is insulated from each other, and is often twisted around a center, and the entire outer surface is covered with a highly insulating covering layer. Cables have the characteristics of internal energization and external insulation.

[0003] In the prior art, when cables are arranged on a building roof, in order to prevent the cables from being exposed and scratched and damaged, a bridge is usually installed on the roof, and the cables are laid in the bridge to achieve protection of the cables; the traditional cable bridge is a "匚"-shaped plate with the notch facing the roof. After the cables are laid in the bridge, a cover plate is installed above the bridge for protection.

[0004] However, the notch of the traditional bridge faces upward. When replacing or maintaining the cables inside the bridge, it is necessary to remove the cover plate above the bridge first, and then lean over the bridge to operate the cables laid inside the bridge. However, there is usually a small distance between the bridge and the roof, so when leaning over to operate the cables, the operating space is small, and it easily increases the operator's fatigue; moreover, the distance between the bridge and the roof affects the available indoor height. Summary of the Invention

[0005] The object of the present invention is to provide a cable installation bridge for building roofs that is convenient for maintenance from the bottom, so as to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: a cable installation bridge for building roofs convenient for maintenance from the bottom, comprising a top shell, a partition frame is fixed on the bottom surface of the top plate of the top shell, the bottom of the partition frame is slidably connected with an extending buckle plate, the bottom surface of the extending buckle plate is fixed with a connecting frame, the bottom of the connecting frame is rotatably connected with a sealing plate, one end of the sealing plate is clamped on the side plate of the top shell, an installation frame is fixed on the bottom surface of the top plate of the top shell, an inserting plate is inserted into the side plate of the top shell, the inserting plate penetrates the installation frame and is inserted into the surface of the first positioning groove, the first positioning groove is opened on the side plate of the extending buckle plate, a cable hanging plate is fixed on the bottom surface of the installation frame, a telescopic blocking piece is movably inserted on the surface of the cable hanging plate, a supporting plate is fixed on the surface of the extending buckle plate, a pressing plate is arranged above the supporting plate, the pressing plate is slidably connected on the side plate of the extending buckle plate, the supporting plate is used for supporting cables, the pressing plate is used for clamping the cables on the supporting plate, the two ends of the top shell are respectively provided with a connecting groove and a connecting plate, a positioning inserting plate is movably inserted on the surface of the connecting plate, one end of the positioning inserting plate is inserted into the second positioning groove, and the second positioning groove is opened on the surface of the connecting groove.

[0007] Preferably, the top shell has a □-shaped plate structure, the separation frame has a square-shaped plate structure, the separation frame is located at the middle position between the two parallel side plates of the top shell, the extension buckle plate has a U-shaped plate structure, a lapping plate is fixed between the two side plates of the extension buckle plate, the lapping plate is slidably connected in the inner annular opening of the separation frame, the bottom surface of the separation frame is provided with an embedding groove, a first rubber clamping strip is fixed on the top surface of the embedding groove, and the thickness of the first rubber clamping strip is greater than the depth of the embedding groove.

[0008] Preferably, the connecting frame has a □-shaped plate structure, two limit rods are fixed between the two side plates of the connecting frame, the limit rods movably penetrate through the sealing plate, one end of the sealing plate is fixed with an elastic hanging plate, a clamping strip is fixed on the surface of the elastic hanging plate, the clamping strip is inserted into a clamping groove, the clamping groove is opened on the side plate of the top shell, a first pull ring is fixed on the surface of the elastic hanging plate, the first pull ring and the clamping strip are symmetrically distributed about the elastic hanging plate, a second rubber clamping strip is fixed on the surface of the sealing plate, and after the clamping strip is inserted into the clamping groove, the second rubber clamping strip is clamped between the sealing plate and the top shell and deforms.

[0009] Preferably, the mounting frames have an L-shaped plate structure, there are two groups of mounting frames, the two groups of mounting frames are symmetrically distributed about the separation frame, a side groove is opened on the side plate of the top shell, an inserting plate is movably inserted on the surface of the side groove, one end of the inserting plate located inside the side groove is fixed with a traction plate, a plurality of notches are opened on the surface of the traction plate, a first elastic rubber band is inserted inside the notches, two ends of the first elastic rubber band are respectively fixed on the top surface and the bottom surface of the side groove, a second pull ring is fixed on the surface of the traction plate, the second pull ring penetrates through a second elastic rubber band, the second elastic rubber band is fixed between the top surface and the bottom surface of the side groove, and the bottom surface of the other end of the inserting plate is provided with a first inclined surface.

[0010] Preferably, a blocking strip is fixed on the top surface of the inserting plate, an elastic support strip is fixed between the blocking strip and the side plate of the top shell, the elastic support strip is a U-shaped strip. When a user pinches the second pull ring to pull the traction plate to pull the inserting plate, the first elastic rubber band and the second elastic rubber band are propped and deformed by the traction plate, and the elastic support strip is squeezed and deformed by the blocking strip.

[0011] Preferably, the cable hanging plates have a J-shaped plate structure, there are a plurality of cable hanging plates, the plurality of cable hanging plates are distributed side by side on the bottom surface of the mounting frame, first heat dissipation holes are opened on both the side plate and the bottom plate of the cable hanging plate, a预留槽 is opened on the surface of the cable hanging plate, a telescopic blocking piece is movably inserted in the预留槽, the telescopic blocking piece has an inverted U-shaped plate structure, a rubber supporting plate is fixed between the bottom surface of the top plate of the telescopic blocking piece and the bottom surface of the预留槽, and the top surface of the bottom plate of the cable hanging plate is an arc-shaped curved surface for placing cables.

[0012] Preferably, the support plate is provided in two sets, symmetrically distributed about the extension buckle plate. Each set has multiple support plates, which are arranged vertically along the side plate of the extension buckle plate. Multiple reinforcing support strips are fixed to the bottom surface of the support plate, with one end of each strip fixed to the side plate of the extension buckle plate. Multiple wire harness grooves are formed on the top surface of the support plate, and guide grooves are formed on the side plate of the extension buckle plate. Each guide groove corresponds to a support plate and is located above the support plate. A pressure plate is slidably connected within the guide groove, and a fixing element is fixed between the top and bottom surfaces of the guide groove. Multiple columns are installed, each moving through a pressure plate. Springs are fitted onto the column shafts and fixed between the top surface of the guide groove and the top surface of the pressure plate. An elastic strip is fixed to the top surface of the pressure plate. The elastic strip is arc-shaped and one end is fixed to the side plate of the extension buckle plate. The other end of the elastic strip is above the guide groove. A wire pressing groove is provided on the bottom surface of the pressure plate. The wire pressing groove and the wire binding groove correspond one-to-one. Heat dissipation holes are provided on the surface of both the wire pressing groove and the wire binding groove. Multiple snagging grooves are provided at both ends of the pressure plate, and the snagging grooves and the wire pressing grooves are distributed alternately.

[0013] Preferably, the surface of the connecting plate is provided with a control groove, and the top and bottom surfaces of the control groove are provided with through openings. A rubber clamp is fixed between the two side walls of the control groove. A positioning insert is fixed on the top and bottom surfaces of the rubber clamp. The positioning insert has an "L" shaped plate structure, and the rubber clamp has a "+" shaped plate structure. The thickness of the rubber clamp is less than the depth of the control groove. The surface of the rubber clamp has a round opening, and the positioning insert passes through the through opening.

[0014] Preferably, the top shell is provided in two sets. After the two sets of top shells are spliced ​​together, the connecting plate is inserted into the corresponding connecting groove, and the positioning plate passes through the through hole and is inserted into the corresponding positioning groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention proposes a cable tray for building roofs that facilitates bottom-level maintenance. It installs traditional cable trays upside down on the roof, reducing the distance between the tray and the roof, increasing usable height within the building, and allowing for easy access to the cables inside the top shell with the slots facing downwards. Furthermore, the top shell is equipped with a retractable extension plate, with a support plate and pressure plate for cable positioning. A cable hanging plate is also installed inside the top shell for cable routing, preventing tangling between multiple cable groups and facilitating maintenance work. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the connection structure between the top shell and the connecting plate of the present invention;

[0019] Figure 3 This is a schematic diagram of the half-section structure of the present invention. Figure 1 ;

[0020] Figure 4 This is a schematic diagram of the connection structure between the extended buckle plate and the support plate of the present invention;

[0021] Figure 5 This is a schematic diagram of the connection structure between the positioning insert plate and the rubber clamp block of the present invention;

[0022] Figure 6 This is a schematic diagram of the half-section structure of the present invention. Figure 2 ;

[0023] Figure 7 This is a schematic diagram of the connection structure between the mounting bracket and the insert plate of the present invention;

[0024] Figure 8 This is a schematic diagram of the connection structure between the connecting frame and the sealing plate of the present invention;

[0025] Figure 9 This is a schematic diagram of the connection structure between the top shell and the partition frame of the present invention;

[0026] Figure 10 This is a schematic diagram of the unfolded structure of the present invention;

[0027] Figure 11 This is a schematic diagram of the structure after the two sets of top shells of the present invention are assembled;

[0028] Figure 12 This is a schematic diagram of the structure after the two sets of top shells of the present invention are assembled and partially cut open;

[0029] Figure 13 for Figure 3 Enlarged structural diagram at point A in the middle;

[0030] Figure 14 for Figure 6 Enlarged structural diagram at point B;

[0031] Figure 15 for Figure 6 Enlarged structural diagram at point C;

[0032] Figure 16 for Figure 6 Enlarged structural diagram at point D;

[0033] Figure 17 for Figure 16 Enlarged structural diagram at point E;

[0034] Figure 18 for Figure 12 Enlarged structural diagram at point F;

[0035] Figure 19 for Figure 18Enlarged structural diagram at point G.

[0036] In the diagram: 1. Top shell; 2. Divider frame; 3. Extension buckle plate; 4. Overlap plate; 5. Mounting groove; 6. Rubber clip 1; 7. Connecting frame; 8. Limiting rod; 9. Sealing plate; 10. Elastic hanging piece; 11. Clip; 12. Pull ring 1; 13. Rubber clip 2; 14. Mounting bracket; 15. Side groove; 16. Insert plate; 17. Positioning groove 1; 18. Stop bar; 19. Elastic support bar; 20. Traction plate; 21. Notch; 22. Elastic rubber band 1; 23. Elastic rubber band 2; 24. Pull ring. 25. Hanging plate 26. Reserved groove 27. Telescopic baffle 28. Rubber support plate 29. Heat dissipation hole 1 30. Support plate 31. Cable tray 32. Guide groove 33. Pressure plate 34. Pressure groove 35. Heat dissipation hole 2 36. Column 37. Spring 38. Elastic pressure strip 39. Picking groove 40. Connecting groove 41. Connecting plate 42. Positioning groove 2 43. Control groove 44. Through hole 45. Positioning insert plate 46. Rubber clamp 47. Reinforcing support strip 48. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Example 1

[0039] Please see Figures 1 to 3 as well as Figure 6This invention provides a technical solution: a cable tray for building roofs that is easy to inspect from the bottom, comprising a top shell 1, a partition frame 2 fixed to the bottom surface of the top plate of the top shell 1, an extension buckle plate 3 slidably connected to the bottom of the partition frame 2, a connecting frame 7 fixed to the bottom surface of the extension buckle plate 3, a sealing plate 9 rotatably connected to the bottom of the connecting frame 7, one end of the sealing plate 9 being snapped onto the side plate of the top shell 1, an installation frame 15 fixed to the bottom surface of the top plate of the top shell 1, an insert plate 17 inserted into the side plate of the top shell 1, the insert plate 17 penetrating the installation frame 15 and inserting into the surface of a positioning groove 18, the positioning groove 18 being formed on the side plate of the extension buckle plate 3, a hanging plate 26 fixed to the bottom surface of the installation frame 15, a telescopic baffle 28 movably inserted into the surface of the hanging plate 26, a support plate 31 fixed to the surface of the extension buckle plate 3, a pressure plate 34 provided above the support plate 31, the pressure plate 34 being slidably connected to the extension buckle plate 3. On the side plate of plate 3, support plate 31 is used to support the cable, and pressure plate 34 is used to clamp the cable on support plate 31. The two ends of the top shell 1 are respectively provided with connecting groove 41 and connecting plate 42. The surface of connecting plate 42 is movably inserted with positioning plate 46. One end of positioning plate 46 is inserted into positioning groove 43. Positioning groove 43 is opened on the surface of connecting groove 41. The traditional cable tray is installed upside down on the roof, which not only reduces the distance between the cable tray and the roof and increases the usable height of the indoor space, but also makes it easier to inspect and maintain the cables laid inside the top shell 1 with the groove facing downward. In addition, an extension buckle 3 that can be lifted and pulled out is installed inside the top shell 1, and support plate 31 is installed on the extension buckle 3 in conjunction with pressure plate 34 to limit the cable. A hanging plate 26 is installed inside the top shell 1 for laying cables to avoid tangling between multiple groups of cables and facilitate the progress of maintenance work.

[0040] Example 2

[0041] See attached document Figure 8, on the basis of Embodiment 1, in order to fix the sealing plate 9 on the bottom of the top case 1 to shield and protect the cables arranged inside the top case 1, the top case 1 is in a "匚"-shaped plate structure, the dividing frame 2 is in a "回"-shaped plate structure, the dividing frame 2 is located at the middle position between the two parallelly distributed side plates of the top case 1, the extension gusset plate 3 is in a "U"-shaped plate structure, a lapping plate 4 is fixed between the two side plates of the extension gusset plate 3, the lapping plate 4 is slidably connected in the inner ring opening of the dividing frame 2, an embedding groove 5 is provided on the bottom surface of the dividing frame 2, a first rubber clamping strip 6 is fixed on the top surface of the embedding groove 5, and the thickness of the first rubber clamping strip 6 is greater than the depth of the embedding groove 5; the connecting frame 7 is in a "匚"-shaped plate structure, two limit rods 8 are fixed between the two side plates of the connecting frame 7, the limit rods 8 movably penetrate through the sealing plate 9, an elastic hanging piece 10 is fixed at one end of the sealing plate 9, a clamping strip 11 is fixed on the surface of the elastic hanging piece 10, the clamping strip 11 is inserted into a clamping groove 12, the clamping groove 12 is provided on the side plate of the top case 1, a first pull ring 13 is fixed on the surface of the elastic hanging piece 10, the first pull ring 13 and the clamping strip 11 are symmetrically distributed about the elastic hanging piece 10, a second rubber clamping strip 14 is fixed on the surface of the sealing plate 9, after the clamping strip 11 is inserted into the clamping groove 12, the second rubber clamping strip 14 is clamped between the sealing plate 9 and the top case 1 and deforms.

[0042] When it is necessary to swing and open the sealing plate 9 horizontally hung at the bottom of the top case 1, pinch the first pull ring 13 to pull the elastic hanging piece 10, after being pulled, the elastic hanging piece 10 pulls the clamping strip 11 to disengage from the clamping groove 12, at this time, there is no limit between the extension gusset plate 3 and the dividing frame 2, the extension gusset plate 3 slides down along the dividing frame 2 until the lapping plate 4 laps on the top surface of the inner ring opening of the dividing frame 2, and the sealing plate 9 rotates and hangs down around the limit rods 8.

[0043] Embodiment 3

[0044] Refer to the attached Figure 7 and Figure 9Based on Embodiment 2, in order to prevent the extension buckle 3 inserted into the top shell 1 from detaching and limit its movement, the mounting frame 15 has an "L"-shaped plate structure. Two sets of mounting frames 15 are provided, symmetrically distributed about the partition frame 2. A side groove 16 is provided on the side plate of the top shell 1. An insert plate 17 is movably inserted into the surface of the side groove 16. A traction plate 21 is fixed to one end of the insert plate 17 inside the side groove 16. Multiple notches 22 are provided on the surface of the traction plate 21. An elastic rubber band 23 is inserted into the notch 22, and both ends of the elastic rubber band 23 are fixed to the top and bottom surfaces of the side groove 16, respectively. On the top, a pull ring 25 is fixed to the surface of the traction plate 21. The pull ring 25 passes through the elastic rubber band 24. The elastic rubber band 24 is fixed between the top surface and the bottom surface of the side groove 16. The bottom surface of the other end of the insert plate 17 is provided with an inclined surface. A stop bar 19 is fixed to the top surface of the insert plate 17. An elastic support bar 20 is fixed between the stop bar 19 and the side plate of the top shell 1. The elastic support bar 20 is in the shape of a "U". When the user squeezes the pull ring 25 to pull the traction plate 21 and pull the insert plate 17, the elastic rubber band 23 and the elastic rubber band 24 are supported and deformed by the traction plate 21, and the elastic support bar 20 is squeezed and deformed by the stop bar 19.

[0045] When the pull ring 13 is squeezed, the traction plate 21 is pulled, causing the insert plate 17 to slide. The traction plate 21 stretches the elastic rubber band 23 and the elastic rubber band 24, causing elastic deformation. The stop strip 19 also squeezes the elastic support strip 20, causing elastic deformation, until one end of the insert plate 17 is disengaged from the positioning groove 18. After the elastic hanging piece 10 is pulled, the traction clip 11 is disengaged from the clip groove 12. At this time, there is no limit between the extension buckle 3 and the partition frame 2. The extension buckle 3 slides down along the partition frame 2 until the overlapping plate 4 overlaps the top surface of the inner ring of the partition frame 2. When the extension buckle 3 is fully fastened to the partition frame 2, the insert plate 17 is inserted into the positioning groove 18, and the rubber clip 6 is squeezed and deformed. The rebound force of the rubber clip 6 supports the extension buckle 3, so that the top surface of the positioning groove 18 is tightly overlapped with the insert plate 17, realizing a firm connection between the insert plate 17 and the positioning groove 18.

[0046] Example 4

[0047] Based on Embodiment 3, in order to prevent the cables laid on the cable hanging plate 26 from detaching and limit their movement, the cable hanging plate 26 has a "J"-shaped plate structure. Multiple cable hanging plates 26 are provided and arranged side by side on the bottom surface of the mounting frame 15. Heat dissipation holes 30 are provided on the side plates and bottom plates of the cable hanging plate 26. A reserved groove 27 is provided on the surface of the cable hanging plate 26. A telescopic baffle 28 is movably inserted into the reserved groove 27. The telescopic baffle 28 has an inverted "U"-shaped plate structure. A rubber support plate 29 is fixed between the bottom surface of the top plate of the telescopic baffle 28 and the bottom surface of the reserved groove 27. The top surface of the bottom plate of the cable hanging plate 26 has an arc-shaped curved surface for placing cables.

[0048] When the cable needs to be laid on the hanging plate 26, press down on the telescopic baffle 28 with your finger to retract it into the reserved groove 27. The telescopic baffle 28 squeezes the rubber support plate 29 and deforms, pushing the cable into the arc groove. After releasing the telescopic baffle 28, the rubber support plate 29 rebounds and lifts the telescopic baffle 28. At this time, the telescopic baffle 28 surrounds one side of the hanging plate 26 to prevent the cable inside the hanging plate 26 from slipping out of the hanging plate 26.

[0049] Example 5

[0050] See attached document Figure 4 and Figure 10 As shown, in order to arrange cable trays 31 and pressure plates 34 on both sides of the extension plate 3, two sets of trays 31 are provided, symmetrically distributed about the extension plate 3. Each set of trays 31 has multiple trays 31, which are arranged vertically along the side plate of the extension plate 3. Multiple reinforcing support bars 48 are fixed to the bottom surface of the trays 31, and one end of the reinforcing support bars 48 is fixed to the side plate of the extension plate 3. Multiple cable tray grooves 32 are provided on the top surface of the trays 31, and guide grooves 33 are provided on the side plate of the extension plate 3. The guide grooves 33 correspond one-to-one with the trays 31, and the guide grooves 33 are located above the trays 31. The pressure plates 34 are slidably connected in the guide grooves 33. The top surface of the guide grooves 33 and the guide grooves 34 are connected to each other. Multiple columns 37 are fixed between the bottom surfaces of the plate 34. The columns 37 movably pass through the pressure plate 34. A spring 38 is sleeved on the rod of the column 37. The spring 38 is fixed between the top surface of the guide groove 33 and the top surface of the pressure plate 34. An elastic pressure strip 39 is fixed on the top surface of the pressure plate 34. The elastic pressure strip 39 is an arc-shaped strip. One end of the elastic pressure strip 39 is fixed on the side plate of the extension buckle plate 3. One end of the elastic pressure strip 39 is above the guide groove 33. A wire pressing groove 35 is opened on the bottom surface of the pressure plate 34. The wire pressing groove 35 and the wire binding groove 32 correspond one-to-one. Heat dissipation holes 36 are opened on the surface of both the wire pressing groove 35 and the wire binding groove 32. Multiple picking grooves 40 are opened at both ends of the pressure plate 34. The picking grooves 40 and the wire pressing grooves 35 are distributed alternately.

[0051] When cables need to be laid on the tray 31, fingers are inserted into the picking groove 40, and the pressure plate 34 is pushed upwards and slid along the guide groove 33. During this process, the pressure plate 34 compresses the spring 38 and deforms, and the elastic pressure strip 39 undergoes elastic deformation under pressure. When the gap between the pressure plate 34 and the tray 31 is large enough to push the cable in, the cable is pushed into the cable tray 32 on the surface of the tray 31. Then the pressure plate 34 is released, and the elastic pressure strip 39 and the spring 38 rebound and push the pressure plate 34 down along the guide groove 33 until the cable tray 35 is secured to the cable. This achieves the partitioned laying of multiple sets of cables and avoids tangling between cables.

[0052] Example 6

[0053] See attached document Figure 11 and Figure 12 As shown, in order to achieve the limiting and fixing of the two top shells 1 after the final assembly, the surface of the connecting plate 42 is provided with a control groove 44. The top and bottom surfaces of the control groove 44 are provided with through holes 45. A rubber clamp 47 is fixed between the two side walls of the control groove 44. A positioning insert 46 is fixed on the top and bottom surfaces of the rubber clamp 47. The positioning insert 46 has an "L" shaped plate structure, and the rubber clamp 47 has a "+" shaped plate structure. The thickness of the rubber clamp 47 is less than the depth of the control groove 44. The surface of the rubber clamp 47 is provided with a round opening, and the positioning insert 46 passes through the through hole 45. There are two sets of top shells 1. After the two sets of top shells 1 are finished and spliced, the connecting plate 42 is inserted into the corresponding connecting groove 41, and the positioning insert 46 passes through the through hole 45 and is inserted into the corresponding positioning groove 43.

[0054] When the two top shells 1 need to be assembled, the two top shells 1 are inserted into the corresponding connecting grooves 41 through the connecting plate 42. Two fingers simultaneously pinch the two positioning plates 46 to squeeze the rubber clamp 47. One end of the positioning plate 46 retracts into the through hole 45. After the connecting plate 42 is inserted into the corresponding connecting groove 41, the positioning plate 46 is released. The rubber clamp 47 rebounds and pushes the positioning plate 46 into the second positioning groove 43, thus realizing the assembly and fixation of the two sets of top shells 1.

[0055] In actual use, when it is necessary to lay cables inside the top shell 1, the middle finger of one hand hooks the pull ring 13 to pull the traction plate 21, causing the insert plate 17 to slide. The thumb of the other hand hooks the pull ring 25 to pull the elastic hanging piece 10. During this process, the traction plate 21 pulls the elastic rubber band 23 and the elastic rubber band 24 to undergo elastic deformation, and the stop bar 19 squeezes the elastic support bar 20 to undergo elastic deformation until one end of the insert plate 17 disengages from the positioning groove 18, and the elastic hanging piece 10 is pulled and the traction clip 11 disengages from the clip groove 12. At this time, there is no limit between the extension buckle 3 and the partition frame 2. The extension buckle 3 slides down along the partition frame 2 until the overlapping plate 4 overlaps the top surface of the inner ring of the partition frame 2, and the sealing plate 9 rotates and hangs down around the limit rod 8. The state at this time is as shown in the attached figure. Figure 10As shown; when the cable needs to be laid on the hanging plate 26, press down on the telescopic baffle 28 with your finger to retract it into the reserved groove 27. The telescopic baffle 28 compresses the rubber support plate 29 and deforms, pushing the cable into the arc groove. After releasing the telescopic baffle 28, the rubber support plate 29 rebounds and lifts the telescopic baffle 28. At this time, the telescopic baffle 28 surrounds one side of the hanging plate 26 to prevent the cable inside the hanging plate 26 from slipping out. When the cable needs to be laid on the support plate 31, put your finger in the picking groove 40 and push the pressure plate 34 upward to slide along the guide groove 33. During this process, the pressure plate 34 compresses the spring 38 and deforms, and the elastic pressure strip 39 is compressed and undergoes elastic deformation until the gap between the pressure plate 34 and the support plate 31 is large enough to push the cable in. When the cable is pushed into the cable tray 32 on the surface of the tray 31, the pressure plate 34 is released. The elastic pressure strip 39 and the spring 38 rebound and push the pressure plate 34 down along the guide groove 33 until the pressure groove 35 is fastened to the cable, so as to realize the partitioned layout of multiple groups of cables and avoid the entanglement between cables. After the cable is laid, the extension buckle 3 is pushed upward and slides along the partition frame 2. The top surface of the extension buckle 3 pushes the insert plate 17 along the inclined surface. When the positioning groove 18 and the insert plate 17 are opposite, the insert plate 17 rebounds and inserts into the positioning groove 18, so as to realize the connection between the partition frame 2 and the extension buckle 3. Then, the sealing plate 9 is rotated around the limiting rod 8. After the sealing plate 9 is placed flat under the top shell 1, the locking strip 11 is inserted into the locking groove 12 to prevent the sealing plate 9 from swinging randomly.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cable tray for building roofs that is easy to access from the bottom, comprising a top shell (1), characterized in that: A partition frame (2) is fixed to the bottom surface of the top plate of the top case (1), the bottom of the partition frame (2) is slidably connected with an extension buckling plate (3), the bottom surface of the extension buckling plate (3) is fixed with a connecting frame (7), the bottom of the connecting frame (7) is rotatably connected with a sealing plate (9), one end of the sealing plate (9) is clamped on the side plate of the top case (1), a mounting frame (15) is fixed to the bottom surface of the top plate of the top case (1), an inserting plate (17) is inserted into the side plate of the top case (1), the inserting plate (17) penetrates through the mounting frame (15) and then is inserted into the surface of a first positioning groove (18), the first positioning groove (18) is opened on the side plate of the extension buckling plate (3), a wire hanging plate (26) is fixed to the bottom surface of the mounting frame (15), a telescopic blocking piece (28) is movably inserted into the surface of the wire hanging plate (26), a supporting plate (31) is fixed to the surface of the extension buckling plate (3), a pressing plate (34) is arranged above the supporting plate (31), the pressing plate (34) is slidably connected to the side plate of the extension buckling plate (3), the supporting plate (31) is used for supporting cables, the pressing plate (34) is used for clamping the cables on the supporting plate (31), two ends of the top case (1) are respectively provided with an engaging groove (41) and an engaging plate (42), a positioning inserting plate (46) is movably inserted into the surface of the engaging plate (42), one end of the positioning inserting plate (46) is inserted into a second positioning groove (43), and the second positioning groove (43) is opened on the surface of the engaging groove (41); The connecting frame (7) is in a U-shaped plate structure, two limiting rods (8) are fixed between two side plates of the connecting frame (7), the limiting rods (8) movably penetrate through the sealing plate (9), one end of the sealing plate (9) is fixed with an elastic hanging piece (10), a clamping strip (11) is fixed on the surface of the elastic hanging piece (10), the clamping strip (11) is inserted into a clamping groove (12), the clamping groove (12) is opened on the side plate of the top case (1), a first pull ring (13) is fixed on the surface of the elastic hanging piece (10), the first pull ring (13) and the clamping strip (11) are symmetrically distributed about the elastic hanging piece (10), a second rubber clamping strip (14) is fixed on the surface of the sealing plate (9), after the clamping strip (11) is inserted into the clamping groove (12), the second rubber clamping strip (14) is clamped between the sealing plate (9) and the top case (1) and deforms; the mounting frames (15) are in an L-shaped plate structure, two groups of the mounting frames (15) are provided, the two groups of mounting frames (15) are symmetrically distributed about the partition frame (2), a side groove (16) is opened on the side plate of the top case (1), the inserting plate (17) is movably inserted into the surface of the side groove (16), one end of the inserting plate (17) located inside the side groove (16) is fixed with a traction plate (21), a plurality of notches (22) are opened on the surface of the traction plate (21), a first elastic rubber belt (23) is inserted into the notches (22), two ends of the first elastic rubber belt (23) are respectively fixed on the top surface and the bottom surface of the side groove (16), a second pull ring (25) is fixed on the surface of the traction plate (21), the second pull ring (25) penetrates through a second elastic rubber belt (24), the second elastic rubber belt (24) is fixed between the top surface and the bottom surface of the side groove (16), and a first inclined surface is provided on the bottom surface of the other end of the inserting plate (17).

2. The cable tray for building roofs that is easy to inspect from the bottom, as described in claim 1, is characterized in that: The top casing (1) is in a 匚-shaped plate structure, the dividing frame (2) is in a回-shaped plate structure, the dividing frame (2) is located at the middle position between two parallelly arranged side plates of the top casing (1), the extension buckle plate (3) is in a U-shaped plate structure, a lap plate (4) is fixed between two side plates of the extension buckle plate (3), the lap plate (4) is slidably connected in the inner ring opening of the dividing frame (2), an embedding groove (5) is opened on the bottom surface of the dividing frame (2), a first rubber clamping strip (6) is fixed on the top surface of the embedding groove (5), and the thickness of the first rubber clamping strip (6) is greater than the depth of the embedding groove (5).

3. The cable tray for building roofs that is easy to inspect from the bottom, as described in claim 1, is characterized in that: A blocking strip (19) is fixed on the top surface of the inserting plate (17), an elastic support strip (20) is fixed between the blocking strip (19) and the side plate of the top casing (1), the elastic support strip (20) is a U-shaped strip. When a user pinches the second pull ring (25) and pulls the traction plate (21) to pull the inserting plate (17), the first elastic rubber band (23) and the second elastic rubber band (24) are supported and deformed by the traction plate (21), and the elastic support strip (20) is extruded and deformed by the blocking strip (19).

4. A cable tray for building roofs that is easy to inspect from the bottom, as described in claim 1, characterized in that: The wire hanging plates (26) are in a J-shaped plate structure, there are a plurality of wire hanging plates (26), the plurality of wire hanging plates (26) are arranged side by side on the bottom surface of the mounting frame (15), first heat dissipation holes (30) are respectively opened on the side plate and the bottom plate of each wire hanging plate (26), a预留 groove (27) is opened on the surface of the wire hanging plate (26), the telescopic blocking piece (28) is movably inserted into the预留 groove (27), the telescopic blocking piece (28) is in an inverted U-shaped plate structure, a rubber support plate (29) is fixed between the bottom surface of the top plate of the telescopic blocking piece (28) and the bottom surface of the预留 groove (27), and the top surface of the bottom plate of the wire hanging plate (26) is a circular arc curved surface for placing cables.

5. A cable tray for building roofs that is easy to inspect from the bottom, as described in claim 1, characterized in that: The tray (31) is provided in two sets, and the two sets of trays (31) are symmetrically distributed about the extension buckle (3). Each set of trays (31) has multiple trays, and the multiple trays (31) are arranged vertically along the side plate of the extension buckle (3). Multiple reinforcing support strips (48) are fixed on the bottom surface of the tray (31), and one end of the reinforcing support strip (48) is fixed to the side plate of the extension buckle (3). Multiple wire harness grooves (32) are opened on the top surface of the tray (31), and guide grooves (33) are opened on the side plate of the extension buckle (3). The guide grooves (33) correspond one-to-one with the trays (31). The guide grooves (33) are located above the trays (31). The pressure plate (34) is slidably connected in the guide grooves (33). Multiple columns (37) are fixed between the top surface and the bottom surface of the guide grooves (33). 37) The movable through pressure plate (34) is fitted with a spring (38) on the rod of the column (37). The spring (38) is fixed between the top surface of the guide groove (33) and the top surface of the pressure plate (34). An elastic pressure strip (39) is fixed on the top surface of the pressure plate (34). The elastic pressure strip (39) is an arc-shaped strip. One end of the elastic pressure strip (39) is fixed on the side plate of the extension buckle plate (3). One end of the elastic pressure strip (39) is above the guide groove (33). A wire pressing groove (35) is opened on the bottom surface of the pressure plate (34). The wire pressing groove (35) and the wire binding groove (32) correspond one-to-one. Heat dissipation holes (36) are opened on the surface of the wire pressing groove (35) and the wire binding groove (32). Multiple scooping grooves (40) are opened at both ends of the pressure plate (34). The scooping grooves (40) and the wire pressing grooves (35) are distributed alternately.

6. A cable tray for building roofs that is easy to inspect from the bottom, as described in claim 1, characterized in that: The surface of the connecting plate (42) is provided with a control groove (44). The top and bottom surfaces of the control groove (44) are provided with through openings (45). A rubber clamp (47) is fixed between the two side walls of the control groove (44). A positioning plate (46) is fixed on the top and bottom surfaces of the rubber clamp (47). The positioning plate (46) has an "L" shaped plate structure. The rubber clamp (47) has a "+" shaped plate structure. The thickness of the rubber clamp (47) is less than the depth of the control groove (44). The surface of the rubber clamp (47) is provided with a round opening. The positioning plate (46) passes through the through opening (45).

7. A cable tray for building roofs that is easy to inspect from the bottom, as described in claim 6, characterized in that: The top shell (1) is provided in two sets. After the two sets of top shells (1) are spliced ​​together, the connecting plate (42) is inserted into the corresponding connecting groove (41), and the positioning plate (46) passes through the through hole (45) and is inserted into the corresponding positioning groove (43).

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