A mortise and tenon ladder bridge

Abstract

The utility model discloses a mortise and tenon ladder type bridge, including by two sides parallel's edge beam and the ladder type bridge main unit of the connection two side edge beam's a plurality of crosspieces are formed. In the bridge main unit one end, at least one side's edge beam end portion is equipped with tenon, is equipped with the mortise eye that cooperates with it in the other end corresponding position, and the adjacent bridge main unit is inserted into the mortise eye and realizes the insertion connection through tenon. The cooperation structure of tenon and mortise eye can limit the relative displacement of bridge in the plane perpendicular to the insertion direction, and can bear axial tension, and the contact surface guarantees electrical continuity. The mortise and tenon structure can adopt stamping, welding, casting and other modes and is connected with the edge beam, and can cooperate locking device and realize firm connection. The utility model realizes the modularization connection of bridge, and the installation is convenient, and the strength is high, and the conductivity is excellent, is applicable to the quick assembly and maintenance in the cable laying system.

Description

Technical Field

[0001] This utility model relates to a mortise and tenon ladder-type cable tray. Background Technology

[0002] Ladder-type cable trays are widely used in cable laying in construction, power, and telecommunications industries due to their simple structure, good ventilation and heat dissipation, strong load-bearing capacity, and flexible installation. Traditional ladder-type cable trays mainly consist of side beams and a central crossbeam. The connection between adjacent tray units is usually achieved using bolts or special connecting plates or accessories. This connection method has the following disadvantages: Installation is cumbersome and inefficient: It requires carrying and installing additional bolts, nuts, washers or special connectors, which increases the number of installation steps and time, and is especially inconvenient to operate at heights or in confined spaces.

[0003] Connection reliability depends on the operator: the tightness of the bolts directly affects the stability of the connection. Too loose a bolt may cause the connection to fail, while too tight a bolt may damage the cable tray or accessories.

[0004] Additional attachments are required: This increases material costs and warehousing and management costs.

[0005] Aesthetics affected: Exposed bolt heads and connectors may affect the overall appearance.

[0006] Grounding continuity requires additional handling: additional jumpers are usually needed to ensure electrical continuity of the cable tray system.

[0007] Therefore, there is an urgent need for a ladder-type cable tray connection solution that is faster to install, more reliable in connection, requires no additional accessories, and has a simpler and more aesthetically pleasing structure. Utility Model Content

[0008] The technical problem to be solved by this utility model is to overcome the shortcomings of existing ladder-type cable tray connection methods, such as cumbersome installation, low efficiency, dependence on accessories, and reliability affected by human factors. It provides a mortise and tenon ladder-type cable tray that is simple in structure, quick to install, reliable in connection, requires no additional connection accessories, and has good aesthetics.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A mortise and tenon ladder-type cable tray includes a ladder-type cable tray main unit composed of parallel side beams on both sides and several crossbeams connecting the side beams on both sides: At the first end of the main body unit of the cable tray, at least one side of the end of the side beam is provided with a tenon; At the second end of the main body unit of the cable tray, at least one side of the end of the side beam is provided with a mortise that matches the tenon; Two adjacent cable tray main units can be quickly connected by inserting the tenon on one unit into the corresponding mortise on the other unit; The tenon and mortise are designed to restrict their relative displacement in a plane perpendicular to the insertion direction, usually the length of the cable tray, after insertion, and to withstand a certain axial tensile force to prevent them from easily separating. The tenon and mortise joint structure is designed to ensure electrical continuity between the main cable tray units after insertion.

[0010] Preferably, the tenon is located on the end face or side face of the first end beam of the cable tray main unit; the mortise is located on the end face or side face of the second end beam of the cable tray main unit, corresponding to the tenon. For example, the tenon can be a protruding T-shape, dovetail shape, rectangular block, cylindrical shape, etc.; the mortise is a groove or hole that complements its shape.

[0011] Preferably, the tenon and mortise are made of metal, such as galvanized steel sheet or aluminum alloy, and are integrally formed or fixedly connected to the edge beam by means of stamping, bending, welding, casting or machining.

[0012] Preferably, the contact surface between the tenon and the mortise is a tight fit surface or an interference fit surface to provide initial friction or holding force.

[0013] More preferably, the cable tray further includes a locking device for further locking and securing the tenon and mortise after the tenon is inserted into the mortise, preventing accidental separation. The locking device may be: 1. Elastic clips, springs, or tabs installed near the tenon or mortise; 2. A rotatable eccentric wheel or cam structure; 3. A sliding latch or locking tongue; 4. Tightenable set screws and bolts; Preferably, the operating direction of the locking device, such as the direction of rotation, pressing, or sliding, is different from the insertion and removal direction of the tenon, to prevent misoperation during insertion and removal.

[0014] Preferably, the tenon and mortise structures are symmetrically provided on both side beams.

[0015] Preferably, the crossbar is positioned near the end of the cable tray unit to provide space for the mortise and tenon structure to be implemented on the side beam.

[0016] Preferably, the cross-sectional shape of the side beam, such as the top and side walls, is designed so that after insertion, the top or side surfaces of adjacent side beams can form a smooth or aligned transition, ensuring aesthetics and smooth cable laying.

[0017] Beneficial effects: Compared with the prior art, the mortise and tenon ladder-type cable tray provided by this utility model has the following significant advantages: Installation is extremely quick and efficient: No additional accessories such as bolts, nuts, or connecting pieces are required. Simply align the tenon with the mortise and insert it to complete the initial positioning and connection. This greatly simplifies the installation process and shortens the installation time, making it especially suitable for large-scale laying or high-altitude operations.

[0018] Reliable and secure connection: The mortise and tenon structure itself has excellent shear and torsional resistance. Combined with tight mortise and tenon gaps and optional locking devices, it ensures a firm and reliable connection that is not easily loosened, improving the overall stability and safety of the cable tray system.

[0019] Cost reduction: Eliminating the costs of all connecting accessories, such as bolts, nuts, washers, and connecting plates, also reduces the expenses of accessory management, transportation, and warehousing.

[0020] The structure is simple and beautiful: there are no exposed bolt heads or other accessories at the connection points, making the overall appearance simpler, smoother and more beautiful.

[0021] Ensuring electrical continuity: The mortise and tenon structure uses metal materials and is in close contact, naturally forming a good electrical path, which helps to ensure the grounding continuity of the entire cable tray system and improves safety performance. If a locking device is used, its metal parts also participate in the conduction.

[0022] Reduce the impact of human factors: The reliability of the connection mainly depends on the structural design itself, which reduces the high dependence on the operating skills and sense of responsibility of the installers. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a mortise and tenon ladder-type cable tray; Figure 2 This is a schematic diagram of the connection structure between the tenon and the mortise; 1. Cable tray main unit 11. Side beam 12. Crossbar 2. Tenon 3. Mortise 4. Locking device. Detailed Implementation

[0024] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0025] Example 1: A mortise and tenon ladder-type cable tray, wherein the main unit 1 of the cable tray consists of parallel metals on both sides, such as galvanized steel plate side beams 11, and several metal crossbars 12 welded between the side beams 11, forming a standard ladder structure.

[0026] At the first end of the main unit 1 of the cable tray, a rectangular tenon 2 protruding outward is formed on the outer side of the end of each side beam 11 by stamping.

[0027] At the second end of the main cable tray unit 1, a rectangular mortise 3, matching the size of the rectangular tenon 2, is formed by stamping on the inner side of the end of each side beam 11. The depth of the mortise 3 is slightly greater than the length of the tenon 2.

[0028] During installation, align the rectangular tenon 2 at the left end of the subsequent cable tray main unit 1 with the rectangular mortise 3 at the right end of the preceding cable tray main unit 1, and insert it forcefully along the height direction of the cable tray until the tenon 2 is fully inserted into the bottom of the mortise 3. At this point, the side of the rectangular tenon 2 forms a tight surface contact with the inner wall of the rectangular mortise 3, effectively restricting the relative movement of the two units in the horizontal plane. The end face of the tenon 2 contacts the bottom of the mortise 3, allowing it to withstand a certain axial tensile force.

[0029] The close contact between the metal tenon 2 and the metal mortise 3 naturally forms an electrical conduction path.

[0030] The top of the side beam 11 is designed to be flat, so that the top surfaces of adjacent side beams are flush after insertion.

[0031] Example 2: Based on Example 1, a locking device 4 is added.

[0032] The locking device 4 includes a bolt lock located at the first end of the cable tray main unit 1, and a buckle for fixing the bolt lock tongue at the second end of the cable tray main unit 1.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mortise and tenon ladder-type cable tray, comprising a ladder-type cable tray main unit composed of parallel side beams on both sides and several crossbeams connecting the side beams on both sides, characterized in that, At the first end of the main cable tray unit, at least one side of the edge beam end is provided with a tenon. At the second end of the main cable tray unit, at least one side of the edge beam end is provided with a mortise that matches the tenon. Two adjacent main cable tray units are connected by inserting the tenon on one unit into the corresponding mortise on the other unit. The mating structure of the tenon and mortise can limit the relative displacement of the two in a plane perpendicular to the insertion direction and can withstand axial tensile force. The tenon and mortise are made of metal, and their contact surface ensures electrical continuity.

2. The mortise and tenon ladder-type cable tray according to claim 1, characterized in that, The tenon and mortise are integrally formed or fixedly connected to the edge beam by stamping, bending, welding, casting or machining.

3. The mortise and tenon ladder-type cable tray according to claim 1, characterized in that, It also includes a locking device for locking the two together after the tenon is inserted into the mortise.

4. The mortise and tenon ladder-type cable tray according to claim 3, characterized in that, The locking device is an elastic buckle, a snap ring, a spring, a rotatable eccentric wheel or cam structure, a sliding pin or locking tongue, or a tightenable set screw.

5. The mortise and tenon ladder-type cable tray according to claim 3 or 4, characterized in that: The locking device operates in a direction different from the insertion / removal direction of the tenon.

6. The mortise and tenon ladder-type cable tray according to claim 1, characterized in that: The tenon and mortise structures are symmetrically provided on both side beams.

7. The mortise and tenon ladder-type cable tray according to claim 1, characterized in that: The contact surface between the tenon and the mortise is a tight fit surface or an interference fit surface.

8. The mortise and tenon ladder-type cable tray according to claim 1, characterized in that: The cross-sectional shape of the side beam is designed so that, after insertion, the top or side surfaces of adjacent side beams form a smooth or aligned transition.

9. The mortise and tenon ladder-type cable tray according to claim 1, characterized in that: The tenon is rectangular, T-shaped, dovetail-shaped, or cylindrical, and the mortise is a groove or hole with a matching shape.

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