Bridge type openable drag chain adopting independent cover plate

Abstract

The utility model relates to the technical field of drag chains, in particular to a bridge type openable drag chain adopting an independent cover plate, which is formed by sequentially splicing a plurality of chain link main bodies in a rotating connection mode, and each chain link main body comprises a pay-off frame with the section of a [-shaped structure and a cover plate covering the pay-off frame to form a surrounding structure. Two adjacent pay-off frames are rotationally connected through the side parts, one end of the cover plate is fixedly connected with one end of each pay-off frame, and an elastic transition section is arranged at the end, fixedly connected with the pay-off frames, of the cover plate; by adopting the structural design of the elastic transition section, the cover plate can be automatically opened by a certain angle due to elastic deformation after being opened, and wiring can be carried out more quickly and conveniently; and through the structure of the elastic transition section, the opening degree of a fixed angle can be kept after the cover plates of all the chain link main bodies are opened, and covering action force can be applied to the covering operation of the cover plates in the unified position in the overhauling or assembling process.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drag chain technical field especially to a bridge type openable drag chain adopting independent cover plates. BACKGROUND

[0002] The openable drag chain is a special type of drag chain. Its biggest feature is that its structure design allows the drag chain to be conveniently opened, which is realized through a special connection mode and chain link structure. This design is mainly to facilitate the installation and maintenance of pipelines. For example, when internal cables, air pipes or oil pipes need to be repaired, replaced or new pipelines are added, it is not necessary to laboriously pass the pipelines in and out of the complex chain links as in the traditional closed drag chain. Only by simply opening part of the structure of the openable drag chain can the operation be easily completed. The material of the openable drag chain can be high-strength engineering plastic, which is corrosion-resistant, wear-resistant and light in weight. There are also openable drag chains made of metal materials, which provide protection for some industrial environments with higher requirements for strength and carrying capacity. The openable drag chain plays an important role in automated production lines, numerical control machine tools and logistics and storage equipment, because the pipelines of these devices need to be frequently adjusted or repaired. The openable drag chain can effectively reduce the maintenance time and workload and improve the overall operation efficiency of the equipment.

[0003] However, most of the existing openable drag chains are split type, with the chain link body and the cover plate being separate. This requires all the cover plates to be completely removed before the pipelines inside the drag chain can be installed, which greatly reduces the efficiency of the installation personnel, resulting in an increase in labor costs. Moreover, this split design also leads to an increase in the manufacturing and assembly costs of the drag chain mold. Obviously, this design does not meet the requirements of modern intelligent manufacturing development.

[0004] Thirdly, some products on the market have a broken structure on the outer cover plate of the chain link body, which is called a semi-closed convenient drag chain. The convenient drag chain has the following defects,

[0005] After opening the cover plate, the turning angle of the cover plate is uncertain. Some cover plates will continue to abut and cover the corresponding chain link body after opening. The operator needs to turn and move them away during wiring. Moreover, the turning angle of the cover plate after turning is uncertain, resulting in uneven cover plates that cannot be grasped and closed along a unified position. It is difficult to realize automatic and efficient closing operation with the aid of tools. Therefore, it is necessary to propose an improved technical scheme to solve the above problems. CONTENT OF THE UTILITY MODEL

[0006] The utility model is aimed at providing a technical scheme that can solve the above problems.

[0007] A bridge type openable drag chain with independent cover plates is formed by a plurality of link bodies connected in sequence, the link body comprises a pay-off frame with a cross-section in the shape of a Chinese character and a cover plate covering the pay-off frame to form an enclosed structure, two adjacent pay-off frames are connected by the side portions, one end of the cover plate is fixedly connected to one end of the pay-off frame, and the end of the cover plate fixedly connected to the pay-off frame is provided with an elastic transition section, the cover plate can be turned over on the pay-off frame through elastic deformation of the elastic transition section after being fixed to the pay-off frame, the other end of the cover plate is provided with a single hook buckle, the other end of the pay-off frame is provided with an inverted hook buckle, and the cover plate is covered on the pay-off frame through the buckling cooperation of the single hook buckle and the inverted hook buckle.

[0008] Preferably, one end of the pay-off frame is provided with a slot, a clamping column is formed on the slot, a closed loop structure is formed between the clamping column and the slot, one end of the cover plate is provided with a clamping buckle matched with the closed loop structure, and the cover plate is fixed to the pay-off frame through the clamping cooperation of the clamping buckle and the closed loop structure; wherein the elastic transition section is arranged between the clamping buckle and the cover plate.

[0009] Preferably, the socket comprises a base body abutting against the outside of the corresponding pay-off frame of the closed loop structure, a transition body formed on the base body and penetrating into the closed loop structure, and an expansion body formed on the transition body and abutting against the inside of the corresponding pay-off frame of the closed loop structure, wherein the elastic transition section is formed between the base body and the cover plate, the upper end surface of the transition body is an arc surface abutting against the clamping column, and the expansion body is arranged to be forcibly squeezed through the closed loop structure.

[0010] Preferably, the elastic transition section is an arc surface structure with a smaller thickness than the cover plate, and is bent back at the connecting position between the elastic transition section and the cover plate, so that the cover plate can be opened to a certain angle after the single hook buckle and the inverted hook buckle are separated.

[0011] Preferably, the cover plate can be automatically opened to an angle greater than 60° through the deformation of the elastic transition section after the single hook buckle and the inverted hook buckle are separated.

[0012] Preferably, the inverted hook buckle is located outside the other end of the pay-off frame, and the single hook buckle is arranged perpendicularly to the cover plate, so that the single hook buckle is clamped into the inverted hook buckle along the outside of the pay-off frame after the cover plate is covered.

[0013] Preferably, the pay-off frame has a bottom plate and two side plates connected to the two sides of the bottom plate respectively, one end of the cover plate is fixedly connected to one of the side plates, and the inverted hook buckle is arranged on the other side plate.

[0014] Preferably, a cylindrical hole and a cylinder are arranged on the two ends of the side plate respectively, and the adjacent link bodies are connected by the cylindrical hole and the cylinder of the side plate.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] By adopting the structural design of the elastic transition section, the cover plate can be automatically opened to a certain angle due to elastic deformation, which helps to more quickly and conveniently wire; and by the structure of the elastic transition section, the cover plates of all the link main bodies can be kept at a fixed opening angle after being opened, which helps to apply a cover closing force at a uniform position during the cover closing operation in the maintenance or assembly process, so that the cover closing can be performed by means of a tool, which helps to realize automatic cover closing to a certain extent.

[0017] The elastic transition section can generate a stress between the cover plate and the wire frame after being closed, so that the stress is utilized to restrict each other between the cover plate and the wire frame, so that more stable cooperation can be achieved, and the relaxation of the cover plate and the wire frame after being closed is effectively avoided, and the use effect is reduced.

[0018] The additional aspects and advantages of the present application will be partially given in the following description, and some will become apparent from the following description, or be understood by those skilled in the art through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0020] Figure 1 is a three-dimensional structure schematic diagram of the cover plate of the present application kept at 90° after being opened;

[0021] Figure 2 is a three-dimensional structure schematic diagram of the cover plate of the present application kept at 60° after being opened;

[0022] Figure 3 is a side structure schematic diagram of the present application;

[0023] Figure 4 is a structure schematic diagram of the link main body of the present application kept at 90° after opening the cover plate;

[0024] Figure 5 is a structure schematic diagram of the link main body of the present application kept at 60° after opening the cover plate;

[0025] Figure 6 is a structure schematic diagram of the present application Figure 5 is a structure schematic diagram of the present application in a state of disassembling the cover plate;

[0026] Figure 7 is a structure schematic diagram of the present applicationFigure 5 Another perspective structural diagram;

[0027] Figure 8 This utility model Figure 7 A schematic diagram of the structure with the cover removed;

[0028] Figure 9 This is a structural diagram of the utility model in which the link body is covered with a cover plate.

[0029] The reference numerals and names in the figures are as follows:

[0030] Chain link body 10, wire frame 20, bottom plate 201, side plate 202, cylindrical hole 203, cylinder 204, barb buckle 21, slot 22, snap-on column 23, closed loop structure 24, cover plate 30, elastic transition section 31, single hook buckle 32, plug buckle 33, base 331, transition body 332, expansion body 333. DETAILED DESCRIPTION

[0031] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figures 1-9 In an embodiment of the present invention, a bridge-type openable drag chain with an independent cover plate is formed by splicing a plurality of chain link bodies 10 in sequence in a rotationally connected manner. The chain link body 10 includes a wire-laying frame 20 with a 匚-shaped cross-section and a cover plate 30 covering the wire-laying frame 20 to form an enclosure structure. Two adjacent wire-laying frames 20 are rotatably connected through the side, and one end of the cover plate 30 is fixedly connected to one end of the wire-laying frame 20, and an elastic transition section 31 is provided at one end of the cover plate 30 fixedly connected to the wire-laying frame 20. After the cover plate 30 is fixed to the wire-laying frame 20, it can be flipped on the wire-laying frame 20 through the elastic deformation of the elastic transition section 31. A single hook buckle 32 is provided at the other end of the cover plate 30, and a barb buckle 21 is provided at the other end of the wire-laying frame 20. The cover plate 30 is covered on the wire-laying frame 20 by the snap fit of the single hook buckle 32 and the barb buckle 21.

[0033] By adopting the elastic transition section 31, one end of the cover plate 30 and one end of the pay-off frame 20 can be connected in a fixed manner, and then the elastic deformation effect of the elastic transition section 31 is utilized to achieve the purpose of turning the cover plate 30 along the fixedly connected pay-off frame 20, and then the single hook buckle 32 and the barbed buckle 21 are used for clamping to fix and cover the cover plate 30 and the pay-off frame 20, thereby forming an enclosed structure for placing cables, air pipes or oil pipes and the like. Through this arrangement, pipeline installation can be carried out without completely disassembling all the cover plates 30, greatly reducing the installation time and labor input, improving the installation efficiency, and reducing the labor cost.

[0034] The elastic transition section 31 can generate a certain stress between the cover plate 30 and the pay-off frame 20 after being covered, so that the stress is utilized to restrict each other between the cover plate 30 and the pay-off frame 20, so that a more stable cooperation can be achieved, and the relaxation of the cover plate 30 and the pay-off frame 20 after being covered is effectively avoided, thereby reducing the use effect. The elastic transition section 31 can make the cover plate 30 automatically open to a certain angle after being opened due to elastic deformation, which is helpful for more quickly and conveniently wiring.

[0035] Through the structure of the elastic transition section 31, the cover plate 30 of all the chain link bodies 10 can maintain a fixed angle opening after being opened, which is helpful for applying a covering force at a uniform position during the covering operation of the cover plate 30 during maintenance or assembly, so that the cover plate 30 can be covered by means of a tool, and to some extent, it is helpful to realize automatic covering operation.

[0036] That is, the elastic transition section 31 has the following advantages:

[0037] Firstly, it is convenient for maintenance and assembly: when maintaining or assembling, the cover plate 30 of the chain link body 10 can maintain a fixed angle opening after being opened by means of the design of the elastic transition section 31. This feature allows the operator to accurately position the operation position, provides convenience for subsequent covering operation, reduces the inconvenience caused by different opening degrees of the cover plate, and improves the efficiency of maintenance and assembly.

[0038] Secondly, it is beneficial to realize automation: since all the cover plates 30 can maintain a uniform opening after being opened, the force can be applied at a uniform position during covering, and this standardized operation process is very suitable for being completed by means of a tool, thereby creating favorable conditions for automatic covering operation, which helps to reduce labor cost and improve the degree of automation of production.

[0039] Please refer to Figures 4-9The utility model further puts forward one end of pay -off frame 20 is provided with the slot 22, is formed with the clamping column 23 on the slot 22, and the clamping column 23 and the slot 22 form a closed loop structure 24, and one end of cover plate 30 is provided with the plug buckle 33 of clamping cooperation in closed loop structure 24, and cover plate 30 is fixed in pay -off frame 20 through the clamping cooperation of plug buckle 33 and closed loop structure 24, wherein, the elastic transition section is arranged between plug buckle 33 and cover plate 30.The closed loop structure 24 that the slot 22 of pay -off frame 20 one end and clamping column 23 constitute cooperates with the plug buckle 33 of cover plate 30 one end, realizes the reliable fixing of cover plate 30 and pay -off frame 20 at one end.This closed loop type clamping mode can effectively prevent cover plate 30 from easily separating from pay -off frame 20 due to various external forces during the operation of the drag chain, ensure the integrity and stability of the overall structure of the drag chain, and provide a continuous and stable protection environment for the internal cable.

[0040] Please refer to Figure 6 And Figure 8 The utility model further puts forward the socket includes the base body 331 of abutting tightly in the closed loop structure 24 corresponding pay -off frame 20 outside, the transition body 332 of being formed on the base body 331 and being arranged in the closed loop structure 24, and the expansion body 333 of being formed on the transition body 332 and abutting tightly in the closed loop structure 24 corresponding pay -off frame 20 inner measure, wherein, the elastic transition section 31 is formed between the base body 331 and cover plate 30, the upper end surface of transition body 332 is the arc surface of abutting tightly in clamping column 23, and expansion body 333 is arranged as can forcibly extrude the closed loop structure 24.The base body 331 abutting tightly in pay -off frame 20 outside, and expansion body 333 abutting tightly in pay -off frame 20 inside, and the connection of socket and closed loop structure 24 is stabilized from two opposite directions.This multidirectional abutting tightly mode can effectively resist various direction external force interference, such as impact force, vibration etc.of the drag chain during the operation, ensure that the connection between cover plate 30 and pay -off frame 20 always keeps close state, and will not easily loosen or separate, provide reliable protection barrier for the pipeline inside the drag chain.In addition, the upper end surface of transition body 332 is the arc surface of abutting tightly in clamping column 23, and this design makes the contact area between transition body 332 and clamping column 23 increase and close tightly during connection.On the one hand, the stress borne by the connection site can be evenly dispersed, and the risk of damage of the connection component caused by local stress concentration is reduced, and on the other hand, the close fitting can prevent the gap caused by slight displacement during the movement of the drag chain, avoid the situation such as shaking or abnormal sound, further improve the stability of the overall structure of the drag chain and the smoothness of operation.

[0041] Please refer to Figures 4-8The utility model further puts forward the elastic transition section 31 is the cambered surface structure of low thinness below the cover plate 30, and is bently arranged at the connecting position between the elastic transition section 31 and the cover plate 30, makes single hook buckle 32 and barbed buckle 21 can be broken open to a certain angle after separating from the cover plate 30, generally, single hook buckle 32 and barbed buckle 21 can be broken open to the angle that the angle of being broken open is restored automatically after separating from the cover plate 30 is greater than 60 ° through the deformation of elastic transition section 31, as Figure 1 And Figure 4 As shown, single hook buckle 32 and barbed buckle 21 can be broken open to the angle that the angle of being broken open is restored automatically after separating from the cover plate 30 is greater than 60 °, as Figure 2 、 Figure 5 、 Figure 6 、 Figure 7 And Figure 8 As shown, single hook buckle 32 and barbed buckle 21 can be broken open to the angle that the angle of being broken open is restored automatically after separating from the cover plate 30 is greater than 60 °, when needing to install various pipelines, cables and the like in the tow chain, the automatic maintenance of the breakable design of large angle greatly facilitates the assembly operation. The operator can more clearly observe the internal space of the tow chain, accurately place the pipeline, and reduce the problems of pipeline installation misplacement, winding and the like caused by narrow operation space. Compared with the traditional small-angle opening and closing tow chain cover plate 30, this design can significantly shorten the assembly time, especially in the case of large-scale production or complex pipeline layout, the efficiency improvement is more obvious.

[0042] Please refer to Figures 4-8 The utility model further puts forward that barbed buckle 21 is located at the outer side of the other end of pay-off frame 20, and single hook buckle 32 is vertically arranged with cover plate 30, so that single hook buckle 32 is clamped into barbed buckle 21 along the outer side of pay-off frame 20 after cover plate 30 is closed. Barbed buckle 21 is located at the outer side of the other end of pay-off frame 20, and single hook buckle 32 is vertically arranged with cover plate 30, so that single hook buckle 32 is clamped into barbed buckle 21 along the outer side of pay-off frame 20 after cover plate 30 is closed. Such layout makes the operator only need to push cover plate 30 along the outer side of pay-off frame 20 when cover plate 30 is closed, so that single hook buckle 32 can be smoothly clamped into barbed buckle 21, the whole operation process is intuitive and simple, and does not need complex alignment or special operation skills, whether it is initial installation or subsequent multiple opening and closing of cover plate 30, it can be easily completed, greatly improving the operation efficiency in the daily use of the tow chain. Compared with some designs with complex structure and difficult buckle cooperation, this clear and simple buckle arrangement method can effectively reduce the occurrence of buckle damage or tightness caused by operation errors, and provides convenience for the normal use of the tow chain.

[0043] Please refer to Figures 4-8The utility model further puts forward the line frame 20 has the bottom plate 201 and two side plates 202 connected respectively on both sides of bottom plate 201, one end of cover plate 30 is fixedly connected with one of side plates 202, barb buckle 21 is arranged on the other side plate 202;Cylindrical hole 203 and cylinder 204 are respectively arranged in the normal direction on both ends of side plate 202, and adjacent link main bodies are rotatably connected through cylindrical hole 203 and cylinder 204 of side plate 202.The bottom plate 201 and side plate 202 of line frame 20 build up stable frame, effectively support and protect the pipeline in drag chain, and the closed structure body is formed after cover plate 30 is connected with side plate 202, the overall stability of drag chain is enhanced, can resist multidirectional external force, guarantees pipeline operation safety.Cylindrical hole 203 and cylinder 204 at both ends of side plate 202 realize the rotatable connection of adjacent chain link main body 10, and the rotation is flexible and smooth, the friction resistance is low, can adapt to complex bending and torsional motion, and the stress is uniform, reduces local wear and tear, prolongs service life.At the same time, the manufacturing process of the structure is relatively simple, easy to produce through conventional means, and the assembly process is convenient and fast, without special tools and technology, which is beneficial to large-scale production and manufacturing, improves production efficiency, reduces assembly errors, improves product delivery speed and quality, makes drag chain better play a role in various industrial equipment scenes.

[0044] In order to more clearly set forth the technical scheme of the utility model, the following will be described in expansion regarding the drag chain assembly, line pipe installation and drag chain operation of the bridge type openable drag chain:

[0045] Assemble the drag chain:

[0046] First, the plug-in buckle 33 of the cover plate 30 is aligned with the clamping column 23 and the closed loop structure 24 formed by the insertion slot 22 at one end of the line frame 20.The transition body 332 of the plug-in buckle 33 passes through the closed loop structure 24, and the expansion body 333 can forcibly squeeze through the closed loop structure 24 due to its structural design, and finally abuts against the inside of the line frame 20, and the base body 331 abuts against the outside of the line frame 20, and the plug-in buckle 33 is clamped and matched with the closed loop structure 24, realizing the fixed connection of one end of the cover plate 30 and the line frame 20, at this time the elastic transition section 31 is located between the plug-in buckle 33 and the cover plate 30 in the natural state.Adjacent chain link main bodies 10 are rotatably connected through the cylindrical hole 203 and the cylinder 204 respectively arranged at both ends of the side plate 202, and a plurality of chain link main bodies 10 are sequentially spliced into a complete drag chain structure.

[0047] Install the pipeline:

[0048] When it is needed to install the pipeline in the drag chain, the single hook buckle 32 of the other end of the cover plate 30 is detached from the barbed buckle 21 of the other end of the pay-off frame 20. Since the elastic transition section 31 is an arc surface structure with a thickness lower than that of the cover plate 30 and is bent at the connecting position, after the single hook buckle 32 and the barbed buckle 21 are detached, the cover plate 30 can be turned open by an angle greater than 60° around the fixed end connected with the pay-off frame 20, so as to expose the internal space of the pay-off frame 20, and the pipeline is conveniently placed into the pay-off frame 20.

[0049] Operation of the drag chain:

[0050] After the pipeline is installed, the single hook buckle 32 of the cover plate 30 is clamped into the barbed buckle 21 along the outer side of the pay-off frame 20, so that the cover plate 30 is covered on the pay-off frame 20, and the protection of the pipeline is formed. During the operation of the drag chain, no matter whether it is linear motion or turning motion, the cover plate 30 can keep close covering with the pay-off frame 20, and the pipeline is prevented from being detached. The side plate 202 of the adjacent chain link body 10 is connected through the rotation of the cylindrical hole 203 and the cylindrical body 204, so as to ensure the flexible bending and flexible motion of the whole drag chain, and the different motion paths and working conditions are adapted.

[0051] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A bridge-type openable drag chain with an independent cover plate, which is composed of a plurality of chain link bodies (10) connected in sequence in a rotational manner, characterized in that: The link body (10) includes a wire-releasing frame (20) with a U-shaped cross-section structure and a cover plate (30) covering the wire-releasing frame (20) to form an enclosed structure. Two adjacent wire-releasing frames (20) are rotationally connected through the sides. One end of the cover plate (30) is fixedly connected to one end of the wire-releasing frame (20), and an elastic transition section (31) is provided at the end where the cover plate (30) is fixedly connected to the wire-releasing frame (20). After the cover plate (30) is fixed to the wire-releasing frame (20), it can flip on the wire-releasing frame (20) through the elastic deformation of the elastic transition section (31). A single-hook buckle (32) is provided at the other end of the cover plate (30), and an inverted-hook buckle (21) is provided at the other end of the wire-releasing frame (20). The cover plate (30) is covered on the wire-releasing frame (20) through the buckle cooperation of the single-hook buckle (32) and the inverted-hook buckle (21).

2. A bridge-type openable drag chain with independent cover plates according to claim 1, characterized in that: A slot (22) is provided at one end of the wire-releasing frame (20), and a clamping post (23) is formed on the slot (22). A closed-loop structure (24) is formed between the clamping post (23) and the slot (22). An insertion buckle (33) that is clamped with the closed-loop structure (24) is provided at one end of the cover plate (30). The cover plate (30) is fixed to the wire-releasing frame (20) through the clamping cooperation of the insertion buckle (33) and the closed-loop structure (24); wherein, the elastic transition section is provided between the insertion buckle (33) and the cover plate (30).

3. A bridge-type openable drag chain with independent cover plates according to claim 2, characterized in that: The insertion buckle includes a base body (331) that abuts against the outer side of the wire-releasing frame (20) corresponding to the closed-loop structure (24), a transition body (332) formed on the base body (331) and penetrating inside the closed-loop structure (24), and an expansion body (333) formed on the transition body (332) and abutting against the inner side of the wire-releasing frame (20) corresponding to the closed-loop structure (24). Among them, the elastic transition section (31) is formed between the base body (331) and the cover plate (30). The upper end surface of the transition body (332) is an arc surface that closely adheres to the clamping post (23), and the expansion body (333) is set to be able to forcibly squeeze through the closed-loop structure (24).

4. The bridge-type openable drag chain with independent cover plates according to claim 1, characterized in that: The elastic transition section (31) is an arc surface structure with a thickness lower than that of the cover plate (30), and a bend-back setting is provided at the connection position between the elastic transition section (31) and the cover plate (30), so that the cover plate (30) can be掰开 at a certain angle after the single-hook buckle (32) and the inverted-hook buckle (21) are disengaged.

5. The bridge-type openable drag chain with independent cover plates according to claim 4, characterized in that: After the single-hook buckle (32) and the inverted-hook buckle (21) are disengaged, the cover plate (30) can automatically restore the掰开 angle greater than 60° through the deformation of the elastic transition section (31).

6. The bridge-type openable drag chain with independent cover plates according to claim 1, characterized in that: The inverted-hook buckle (21) is located on the outer side of the other end of the wire-releasing frame (20), and the single-hook buckle (32) is perpendicular to the cover plate (30), so that the single-hook buckle (32) can be snapped into the inverted-hook buckle (21) along the outer side of the wire-releasing frame (20) after the cover plate (30) is covered.

7. The bridge-type openable drag chain with independent cover plates according to claim 1, characterized in that: The wire-releasing frame (20) has a bottom plate (201) and two side plates (s202) respectively connected to both sides of the bottom plate (201). One end of the cover plate (30) is fixedly connected to one of the side plates (202), and the inverted-hook buckle (21) is provided on the other side plate (202).

8. The bridge-type openable drag chain with independent cover plates according to claim 7, characterized in that: A cylindrical hole (203) and a cylinder (204) are respectively arranged in a normal direction at both ends of the side plate (202), and adjacent link bodies are rotatably connected through the cylindrical hole (203) and the cylinder (204) of the side plate (202).

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