A mortise and tenon ladder type cable bridge

Abstract

The application discloses a mortise and tenon ladder type cable bridge which comprises two side beams and a plurality of cross arms, the two ends of the cross arms are connected with the side beams respectively, the side beam comprises a side plate, a connecting part and a connecting beam which are connected in sequence, the connecting part and the connecting beam are formed by inwardly bending and extending from the bottom edge of the side plate, the top surface of the connecting beam is provided with a mortise, the two sides of the mortise are provided with mortise eyes respectively, the mortise eyes extend downward from the top surface of the connecting beam along the side surface of the connecting beam, the end of the cross arm is provided with a tenon, the two side walls of the cross arm extend into the mortise eyes, the tenon extends into the connecting beam through the mortise, the part of the tenon in the connecting beam is bent to make the tenon abut against the inner wall surface of the connecting beam, and the mortise and tenon connection of the cross arm and the side beam is completed. The mortise and tenon ladder type cable bridge has the advantages of simple structure, reasonable design, high bearing capacity and good cable support stability.

Description

Technical Field

[0001] This invention relates to the field of cable tray technology, and in particular to a mortise and tenon ladder-type cable tray. Background Technology

[0002] Cable trays are supporting structures used for laying cables and are commonly used equipment in electrical engineering installations. Cable trays are generally divided into trough type, ladder type, tray type, and mesh structure. Traditional ladder type cable trays have three steel structure connection methods for the crossarms and side beams: welding, bolting, and riveting.

[0003] The existing cable tray technology has the following shortcomings:

[0004] 1. Traditional welded ladder-type cable trays: The crossarms and the bottom edges of the side beams are connected by welding. However, the welding process generates high temperatures. Under the influence of high temperatures, the chemical structure of the steel and the content of many elements will change, causing the cable tray body to deform. In addition, welding will damage the galvanized layer, reducing the service life of the cable tray. Furthermore, there is a heat-affected zone near the weld, which makes the material brittle. The residual stress from welding will make the structure prone to brittle failure, and the residual deformation will cause changes in the shape and size of the structure. Once a weld crack occurs, it can easily spread rapidly along the previous crack. The presence of residual stress and residual deformation will lead to the structure breaking under load.

[0005] 2. Traditional bolted cable tray connection: The crossarm and the bottom edge of the side beam are connected and fixed by bolts. When bolting, it is necessary to consider the control of the tightness. If the control is not proper, loosening is likely to occur, which will affect the connection quality and cause safety hazards such as cable tray deformation and collapse. In addition, since bolted connections are prone to loosening, it is necessary to regularly check whether there is any loosening at the bolt connection to ensure the connection quality. Furthermore, bolts need to be installed one by one, which reduces installation efficiency.

[0006] 3. Traditional riveting connection of cable ladders: Riveting requires the formation of a "dimple" on the surface of the workpiece; otherwise, a loose fit will occur, meaning the connection may be weak. This results in stress concentration at the connection between the metal plate and the rivet. If the fit between the rivet and the metal surface is not tight enough, local cracking may easily occur at the connection, which makes the riveting connection effect unable to achieve the expected results. Summary of the Invention

[0007] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a tenon-and-mortise ladder-type cable tray to solve the technical problems of low installation efficiency and poor load-bearing strength in the prior art.

[0008] This invention is achieved using the following technical solution: a mortise and tenon ladder-type cable tray, comprising two side beams and multiple crossarms, with both ends of the crossarms connected to the side beams respectively; each side beam comprises a side plate, a connecting part, and a connecting beam connected in sequence, the connecting part and the connecting beam being formed by bending inward from the bottom edge of the side plate; the top surface of the connecting beam is provided with a mortise groove, and both sides of the mortise groove are provided with mortises, the mortises extending downward from the top surface of the connecting beam along the side surface of the connecting beam; the end of the crossarm is provided with a tenon, and while the two side walls of the crossarm extend into the mortises, the tenon passes through the mortise groove and extends into the connecting beam, the portion of the tenon located in the connecting beam is bent so that the tenon abuts against the inner wall surface of the connecting beam, thus completing the mortise and tenon connection between the crossarm and the side beam.

[0009] In one possible implementation, a limiting part is provided in the mortise, the limiting part is located near the bottom surface of the mortise, and a first limiting groove is provided on the side wall of the crossbeam, the limiting part extending into the first limiting groove.

[0010] In one possible implementation, a guide slope is provided on the inner wall of the mortise, the guide slope is located on the opposite side of the limiting part, and the guide slope is provided corresponding to the lower middle part of the limiting part.

[0011] In one possible implementation, a second limiting groove is provided on the side wall of the crossbeam, the second limiting groove is located below the first limiting groove, the side wall of the crossbeam extends into the mortise from the second limiting groove, and the bottom surface of the mortise abuts against the bottom surface of the second limiting groove.

[0012] In one possible implementation, the bottom edge of the side wall of the crossarm is bent inward to form a reinforcement, the end of which abuts against the connecting beam.

[0013] In one possible implementation, the tenon and the crossbeam are integrally formed as a single structure.

[0014] In one possible implementation, the top edge of the side panel is provided with a bend for connecting to the outer cover plate.

[0015] In one possible implementation, the edge of the bend extends inward to form a support portion for supporting the outer cover plate.

[0016] In one possible implementation, the side plate is provided with a plurality of first punches, which are arranged in an array.

[0017] In one possible implementation, the top surface of the crossarm is provided with a plurality of second punches, which are evenly spaced apart.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting mortises and tenons on the connecting beam of the side beam and setting tenons at the end of the crossarm, when the side wall of the crossarm extends into the tenon, the tenon passes through the mortis and extends into the connecting beam. Then, the workers use auxiliary tools to bend the head of the tenon and press it tightly on the inner side of the connecting beam to complete the mortise and tenon connection between the crossarm and the side beam. The entire installation process does not require welding or bolts, rivets and other parts, which effectively improves the installation efficiency of the crossarm and the side beam. Moreover, the mortise and tenon ladder cable tray has a simple structure, reasonable design, strong load-bearing capacity and good stability for cable support. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of the tenon-and-mortise ladder-type cable tray of the present invention;

[0020] Figure 2 for Figure 1 Enlarged detail view of point A in the middle;

[0021] Figure 3 for Figure 1 Enlarged detail view of point B in the middle;

[0022] Figure 4 This is a side view of the tenon-and-mortise ladder-type cable tray of the present invention;

[0023] Figure 5 This is a schematic diagram of the crossarm structure in the tenon-and-mortise ladder-type cable tray of the present invention;

[0024] Figure 6 This is a partial sectional view of the crossarm and connecting beam in the tenon-and-mortise ladder-type cable tray of the present invention.

[0025] In the picture:

[0026] 1. Side beam; 11. Side plate; 111. First punch hole; 12. Connecting part; 13. Connecting beam; 131. Mortise and tenon; 132. Tenon; 133. Limiting part; 134. Guide slope; 14. Bending part; 15. Support part;

[0027] 2. Crossbeam; 21. Tenon; 22. First limiting groove; 23. Second limiting groove; 24. Reinforcing part; 25. Second punch. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0031] like Figure 1-6The illustrated mortise and tenon ladder-type cable tray includes two side beams 1 and multiple crossarms 2. The two ends of the crossarms 2 are respectively connected to the side beams 1. The side beams 1 include side plates 11, connecting parts 12 and connecting beams 13 connected in sequence. The connecting parts 12 and connecting beams 13 are both formed by bending inward from the bottom edge of the side plates 11. The top surface of the connecting beams 13 is provided with a mortise groove 131, and the two sides of the mortise groove 131 are respectively provided with mortises 132. The mortises 132 extend downward from the top surface of the connecting beams 13 along the side surface of the connecting beams 13. The ends of the crossarms 2 are provided with tenons 21. While the two side walls of the crossarms 2 extend into the mortises 132, the tenons 21 pass through the mortise grooves 131 and extend into the connecting beams 13. The part of the tenons 21 located in the connecting beams 13 is bent so that the tenons 21 abut against the inner wall surface of the connecting beams 13, thus completing the mortise and tenon connection between the crossarms 2 and the side beams 1. It is easy to understand that the side beam 1 is a one-piece structure, which is beneficial to improving the overall structural strength of the side beam 1. The connecting beam 13 is inverted U-shaped, and the mortise 132 formed on the inverted U-shaped connecting beam 13 is also inverted U-shaped. After the side wall of the crossbeam 2 extends into the mortise 132, it realizes the limitation of the side beam 1 on the crossbeam 2 in the length direction. The end face of the crossbeam 2 abuts against the side plate 11, realizing the limitation of the side beam 1 on the crossbeam 2 in the width direction. Finally, the tenon 21 on the crossbeam 2 that extends into the mortise 131 is further bent, so that the tenon 21 is pressed against the connecting beam 13, realizing the limitation of the side beam 1 on the crossbeam 2 in the height direction. Thus, the crossbeam 2 is fixedly installed on the side beam 1 without the need to install any external fasteners, and the installation is extremely convenient, greatly improving the installation efficiency of the workers. It should also be noted that the mortise 132 on the connecting beam 13 is precision machined by laser, so that the width and height of the mortise 132 are adapted to the part of the side wall of the crossbeam 2 that needs to be inserted, which can avoid the crossbeam 2 being too tight or too loose after insertion; the size of the tenon 131 is slightly larger than the size of the tenon 21, which not only facilitates the insertion of the tenon 21, but also facilitates the insertion of auxiliary tools, so that the auxiliary tools can further bend the tenon 21. In addition, the number of tenons 131 can be freely set according to the actual number of crossbeams 2 to be installed, and the tenons 131 are evenly spaced along the length of the connecting beam 13. The areas near both ends of the crossbeam 2 are provided with structures for tenon-and-mortise connection with the side beam 1.

[0032] Please refer to Figures 1 to 3In one possible implementation, a limiting part 133 is provided within the mortise 132, positioned near the bottom surface of the mortise 132. A first limiting groove 22 is provided on the side wall of the crossbeam 2, and the limiting part 133 extends into the first limiting groove 22. Specifically, the limiting part 133 and the connecting beam 13 are an integral structure. The limiting part 133 extends outward from the inner wall surface of the mortise 132, and a gap is left between the limiting part 133 and the inner wall surface of the mortise 132 on its opposite side to allow the side wall of the crossbeam 2 to pass through. When the side wall of the crossbeam 2 extends into the mortise 132, the crossbeam 2 moves towards the limiting part 133, thereby positioning the limiting part 133 within the first limiting groove 22. This further enhances the limiting effect of the connecting beam 13 on the crossbeam 2.

[0033] Please refer to Figure 6 In one possible implementation, a guide slope 134 is provided on the inner wall of the mortise 132. The guide slope 134 is located opposite to the limiting part 133 and is positioned at the lower middle part of the limiting part 133. It should be noted that the lower part of the mortise 132 is smaller than the upper part, and the upper and lower parts of the mortise 132 are connected by the guide slope 134. This allows the side wall of the crossarm 2 to easily extend into the larger opening, while the smaller bottom of the mortise 132 acts as a limit for the extended side wall of the crossarm 2, making the crossarm 2 more securely installed. Furthermore, as the side wall of the crossarm 2 extends into the mortise 132, the guide slope 134 guides the crossarm 2 to move closer to the limiting part 133, causing the first limiting groove 22 to automatically fit onto the limiting part 133, which further improves the installation efficiency of the crossarm 2.

[0034] Please refer to Figure 4 and Figure 5 In one possible implementation, a second limiting groove 23 is provided on the side wall of the crossbeam 2. The second limiting groove 23 is located below the first limiting groove 22. The side wall of the crossbeam 2 extends into the mortise 132 from the second limiting groove 23, and the bottom surface of the mortise 132 abuts against the bottom surface of the second limiting groove 23. It is easy to understand that the height of the crossbeam 2 is approximately the same as the height of the connecting beam 13. When the crossbeam 2 and the connecting beam 13 are mortised and tenoned, the inner side of the top wall of the crossbeam 2 fits against the outer side of the top wall of the connecting beam 13. Therefore, the setting of the second limiting groove 23 also plays a certain role in avoiding contact, allowing the crossbeam 2 and the connecting beam 13 to fit together. At the same time, the area of ​​the connecting beam 13 located below the mortise 132 will be within the second limiting groove 23, so that the second limiting groove 23 engages with the side wall of the connecting beam 13, thereby improving the strength of the mortise and tenon connection between the crossbeam 2 and the connecting beam 13.

[0035] Please refer to Figure 5In one possible implementation, the bottom edge of the side wall of the crossarm 2 is bent inward to form a reinforcing part 24, and the end of the reinforcing part 24 abuts against the connecting beam 13. It should be noted that the reinforcing part 24 can improve the structural strength of the crossarm 2. The reinforcing part 24 is disposed between the two second limiting grooves 23 on the crossarm 2. The area between the second limiting grooves 23 and the end on the crossarm 2 is located above the connecting part 12. The two ends of the reinforcing part 24 abut against the outer side of the connecting beam 13 on the two side beams 1 respectively. Under the action of the reinforcing part 24, the end of the crossarm 2 located above the connecting part 12 is clamped by the side plate 11 and the connecting beam 13, which further improves the connection strength between the crossarm 2 and the side beam 1. In addition, since the end of the crossarm 2 is clamped by the side plate 11 and the connecting beam 13, it is necessary to use auxiliary tools to knock the crossarm 2 when installing or disassembling the crossarm 2, so that the crossarm 2 is slowly connected to the side beam 1 under the knocking force.

[0036] Please refer to Figure 5 and Figure 6 In one possible implementation, the tenon 21 and the crossbeam 2 are integrally formed. Specifically, the tenon 21 is formed by cutting off three sides from the top wall of the crossbeam 2 and then bending them downwards. At this time, the tenon 21 only needs to be bent downwards at a certain angle so that the tenon 21 can extend into the connecting beam 13. When the side wall of the crossbeam 2 is inserted into the mortise 132, the tenon 21 extends into the connecting beam 13 through the mortise 131. Then, the worker uses auxiliary tools to further bend the tenon 21 until the tenon 21 fits against the inner wall of the connecting beam 13, thus completing the mortise and tenon connection between the crossbeam 2 and the side beam 1.

[0037] Please refer to Figure 4 In one possible implementation, the top edge of the side plate 11 is provided with a bent portion 14, which is used to connect to the outer cover plate. Specifically, the bent portion 14 is S-shaped and is formed by bending the top edge of the side plate 11 upwards. In some cases, the cable tray needs to be covered with a cover plate, and the groove on the bent portion 14 can cooperate with the protrusion on the cover plate, so that the cover plate can be installed on the side beam 1 without the use of bolts, which helps to improve the installation efficiency of the cover plate.

[0038] Please refer to Figure 4 In one possible implementation, the edge of the bent portion 14 extends inward to form a support portion 15, which supports the outer cover plate. It is readily understood that the support portion 15 enhances the support provided by the side beam 1 to the cover plate, and simultaneously improves the bending strength and load-bearing capacity of the side beam 1, thus contributing to a longer service life of the cable tray.

[0039] Please refer to Figure 1 and Figure 3In one possible implementation, the side plate 11 is provided with a plurality of first punches 111, which are arranged in an array. It is easy to understand that the arrangement of the first punches 111 can reduce material consumption without affecting the structural strength of the side plate 11, which is beneficial to reducing the production cost of the side beam 1.

[0040] Please refer to Figure 5 In one possible implementation, the top surface of the crossarm 2 is provided with a plurality of second punches 25, which are evenly spaced apart. It is easy to understand that the arrangement of the second punches 25 can reduce material consumption without affecting the structural strength of the crossarm 2, thereby helping to reduce the production cost of the crossarm 2.

[0041] In summary, the mortise and tenon ladder-type cable tray provided by this invention, by setting mortises and tenons on the connecting beams of the side beams and setting tenons at the ends of the crossarms, when the side wall of the crossarm extends into the tenon, the tenon passes through the mortise and extends into the connecting beam. Then, the workers use auxiliary tools to bend the head of the tenon and press it against the inner side of the connecting beam, thus completing the mortise and tenon connection between the crossarm and the side beam. The entire installation process does not require welding or bolts, rivets, or other parts, effectively improving the installation efficiency of the crossarm and the side beam. The cooperation between the limiting part and the first limiting groove helps to improve the connection strength between the crossarm and the side beam. The setting of the second limiting groove and the reinforcing part further improves the connection strength between the crossarm and the side beam. The setting of the bending part and the support part helps to improve the load-bearing capacity of the side beam and the connection strength between the side beam and the cover plate. Furthermore, this mortise and tenon ladder-type cable tray has a simple structure, reasonable design, and excellent stability for cable support.

[0042] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A mortise and tenon ladder-type cable tray, characterized in that, It includes two side beams and multiple crossbeams, with each end of the crossbeams connected to the side beams; The side beam includes a side plate, a connecting part, and a connecting beam connected in sequence. The connecting part and the connecting beam are both formed by bending inward from the bottom edge of the side plate. The top surface of the connecting beam is provided with a tenon groove, and the two sides of the tenon groove are respectively provided with mortises. The mortises start from the top surface of the connecting beam and extend downward along the side of the connecting beam. The end of the crossbeam is provided with a tenon. While the two side walls of the crossbeam extend into the mortise, the tenon passes through the mortise and extends into the connecting beam. The part of the tenon located in the connecting beam is bent so that the tenon abuts against the inner wall surface of the connecting beam, thus completing the mortise and tenon connection between the crossbeam and the side beam. The mortise is provided with a limiting part, which is located near the bottom surface of the mortise. The side wall of the crossbeam is provided with a first limiting groove, and the limiting part extends into the first limiting groove. The inner wall of the mortise is provided with a guide slope, the guide slope is located on the opposite side of the limiting part, and the guide slope is provided in the lower middle part of the limiting part; The side wall of the crossbeam is provided with a second limiting groove, which is located below the first limiting groove. The side wall of the crossbeam extends into the mortise from the second limiting groove, and the bottom surface of the mortise abuts against the bottom surface of the second limiting groove. The bottom edge of the side wall of the crossbeam is bent inward to form a reinforcing part, and the end of the reinforcing part abuts against the connecting beam; The top edge of the side plate is provided with a bend, which is used to connect the outer cover plate; The edge of the bent portion extends inward to form a support portion, which is used to support the outer cover plate.

2. The tenon-and-mortise ladder-type cable tray as described in claim 1, characterized in that, The tenon and crossbeam are integrally formed into a single structure.

3. The tenon-and-mortise ladder-type cable tray as described in claim 1, characterized in that, The side plate is provided with a plurality of first punches, which are arranged in an array.

4. The tenon-and-mortise ladder-type cable tray as described in claim 1, characterized in that, The top surface of the crossarm is provided with a plurality of second punches, which are evenly spaced.

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