CN110630690A - Metal and plastic composite long-distance anti-collapse drag chain - Google Patents

Abstract

The invention belongs to the technical field of drag chain equipment, and discloses a metal and plastic compounded long-distance anti-collapse drag chain, which comprises a plurality of drag block groups, wherein the plurality of drag block groups are in limit hinge joint, each drag block group comprises a plastic main body, a baffle and a metal pull plate, the metal pull plate is embedded at the lower side of the plastic main body, one end of each drag block group is provided with a support column, the other end of each drag block group is provided with a support hole, the support holes are matched with the support columns, the plastic main body is provided with arc-shaped grooves, one end of the plastic main body extends to form arc-shaped blocks, the arc-shaped blocks and the plastic main body are integrally formed, the arc-shaped grooves are matched with the arc-shaped blocks, and the arc-shaped grooves. The invention has reasonable structure and strong practicability, and the bearing gravity among the towing block groups is converted into the longitudinal tension at the lower part and the jacking force at the upper part by compounding metal and plastic and opening and closing the towing block groups by the support columns, thereby increasing the strength and the bearing capacity of the towing chain and effectively preventing the deformation and the waist collapse of the towing chain.

Description

Metal and plastic composite long-distance anti-collapse drag chain

Technical Field

The invention belongs to the technical field of drag chain equipment, and particularly relates to a long-distance anti-collapse drag chain compounded by metal and plastic.

Background

At present, the drag chain has been widely applied to a great deal of fields such as digit control machine tool, stone material machinery, glass machinery, door and window machinery, injection molding machine, manipulator, jack-up transportation equipment, automatic warehouse, the drag chain can play traction and guard action to built-in cable of machinery, oil pipe, trachea, water pipe etc. makes the whole more pleasing to the eye that looks of machinery simultaneously. The drag chain in the prior art is formed by connecting a plurality of drag block groups, and when the drag chain is used, the drag chain can be divided into three parts according to the motion state: the lower section of the drag chain, the turning ring section and the upper section of the drag chain. The existing drag chain is small in hanging bearing capacity, when the length of the drag chain is long, the drag chain can be bent to different degrees under the action of the self weight and the built-in cables and pipelines, and the built-in cables and pipelines of the drag chain can be damaged by the bending phenomenon. If the drag chain is stressed too much, the upper section of the drag chain is even superposed on the lower section of the drag chain, which is commonly called as waist collapse, if the upper section of the drag chain continuously rubs with the lower section of the drag chain for a long time, not only can the built-in line be damaged, but also the drag chain can be seriously worn, the phenomena of disconnection and fracture of the drag chain are caused, and the service life of the drag chain is seriously shortened.

The existing solutions to the above technical problems are generally: a follow-up supporting mechanism which moves along with the drag chain is arranged below the long-distance drag chain to support the long-distance drag chain and avoid the waist collapse phenomenon. Although the following support mechanism solves the technical problem that the towline collapses the waist, the following defects still exist:

firstly, for a long-distance drag chain, the length of a drag chain follow-up support matched with the drag chain is also longer, and the follow-up support of the long-distance drag chain not only has high manufacturing cost and large difficulty in later management, but also is not high in stability and very easy to break down.

The follow-up supporting mechanism is only suitable for the long-distance drag chain to run under the low-speed state, and when the long-distance drag chain reciprocates under the high-speed state, the phenomenon that the drag chain is partially disconnected can be caused, and under the long-time high-speed state motion state, the follow-up supporting mechanism is great to the wearing and tearing of drag chain, can seriously influence the operational reliability of drag chain, shortens the life of drag chain.

In conclusion, how to design a drag chain which does not collapse down in long-distance turnover work, has long service life and ensures quality becomes a technical problem which needs to be solved urgently.

Disclosure of Invention

The present invention is directed to a long-distance anti-collapse drag chain made of metal and plastic, so as to solve the above-mentioned problems.

In order to realize the purpose of the invention, the technical scheme is as follows:

a long-distance anti-collapse drag chain compounded by metal and plastic comprises a plurality of drag block groups, wherein the drag block groups are in limit hinge joint, each drag block group comprises two plastic main bodies which are symmetrical in structure and position, blocking pieces which are respectively arranged at the upper side and the lower side of each plastic main body and are used for connecting the two plastic main bodies and carrying foreign objects, and a metal pull plate which is used for connecting and supporting the plurality of drag block groups, the metal pull plate is embedded at the lower side of the plastic main bodies, one end of the metal pull plate is provided with a supporting column, the other end of the metal pull plate is provided with a supporting hole, the supporting hole penetrates through the plastic main bodies and is matched with the supporting column, an arc-shaped groove is arranged on the plastic main bodies, an arc-shaped block extends at one end of the plastic main bodies, the arc-shaped block and the plastic main bodies are integrally formed, and the arc, under the support of support column, two the homonymy of tow block group that are connected the plastic main part the arc wall with the arc piece slides each other, so that the opening and closing between the plastic main part one end of plastic main part is located arc piece department is equipped with the stopper the other end of plastic main part is close to arc wall department has seted up fan-shaped spacing groove, the stopper is in slide in the fan-shaped spacing groove and respectively with the both sides cell body inner wall butt of fan-shaped spacing groove, so that it is a plurality of lever between the tow block group supports and spacing turn to realize opening and closing the tow block group through metal and plastic complex and utilize the support column, will tow the bearing weight of block group and convert vertical pulling force and the apical force on upper portion of its lower part into, increase tow chain intensity and bearing capacity, effectively prevent that the tow chain from warping and collapsing the waist.

The invention is further configured to: the plastic rubber main body is characterized in that the separation blade is a flat structure body, fixing grooves are formed in two ends of the separation blade, fixing columns are fixedly connected to the inner walls of the upper side and the lower side of the plastic rubber main body and located at the separation blade, and the fixing columns are sleeved in the fixing grooves and matched with the fixing grooves.

The invention is further configured to: the clamping device comprises a fixed column and a separation blade, wherein a clamping block is integrally connected to one side of the fixed column, clamping grooves are symmetrically formed in the fixing grooves in one side and two ends of the separation blade, the clamping grooves are connected with the clamping block in a clamped mode, and the distance between the clamping grooves and the vertexes of the two ends of the separation blade is kept.

The invention is further configured to: one end of the fixing column, which is far away from the fixing groove, is perpendicular to the inner wall of the plastic main body.

The invention is further configured to: the positioning device is characterized in that a positioning groove is formed in one side edge of the arc-shaped groove, a positioning block is arranged on one side edge of the arc-shaped block, and the positioning groove and the positioning block are both designed in an arc shape and are matched with each other.

The invention is further configured to: one side of plastic main part is close to support hole department, is equipped with first spout and second spout in proper order the opposite side of plastic main part is close to support column department is equipped with first slider and second slider in proper order, first slider with first spout phase-match, the second slider with second spout phase-match.

The invention is further configured to: one side of plastic main part is close to second spout department still is equipped with slide damper the other end of plastic main part is close to second slider department extends there is the slip strip, the slip strip with slide damper butt.

The invention is further configured to: the plastic main body and the baffle sheet are formed by one-time injection molding.

The invention is further configured to: the metal pulling plate is made of an aluminum alloy material, a steel material, a copper alloy material or a zinc alloy.

The invention is further configured to: the plastic pull plate is characterized in that the metal pull plate is provided with a support column and a support hole, the support column is arranged on the metal pull plate, an embedding hole is formed between the support column and the support hole, an embedding block is arranged at the lower side of the plastic main body and is arranged at the metal pull plate, and the embedding block and the plastic main body are integrally formed and are matched with the embedding hole.

In summary, compared with the prior art, the long-distance anti-collapse drag chain compounded by metal and plastic disclosed by the invention comprises a plurality of drag block groups, wherein each drag block group consists of a plastic main body, a baffle and a metal pull plate, wherein, the arc-shaped block and the plastic main body are integrally formed, the arc-shaped groove is matched with the arc-shaped block, the arc-shaped groove and the arc-shaped block slide mutually under the support of the support column, a limiting block is arranged at one end of the plastic main body and positioned at the arc-shaped block, a fan-shaped limiting groove is arranged at the other end of the plastic main body and close to the arc-shaped groove, the limiting block slides in the fan-shaped limiting groove and is respectively abutted against the inner walls of the groove bodies at two sides of the fan-shaped limiting groove to complete the limiting and hinging between the mop block group and the mop block group, so as to facilitate the opening and closing of the plastic main bodies on the same side, facilitate the lever support and the bending among the plurality of tow blocks, prevent the tow chain from collapsing and prolong the service life of the tow chain.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is an overall assembly diagram of a long-distance anti-collapse metal and plastic composite drag chain according to the present embodiment;

fig. 2 is a schematic diagram of an overall structure of the group of dragging blocks provided in this embodiment;

FIG. 3 is a schematic view of the overall structure of the plastic body according to the present embodiment;

fig. 4 is a schematic view of the overall structure of the plastic body provided in this embodiment in another direction;

fig. 5 is a schematic overall structure diagram of the baffle plate provided in the present embodiment;

fig. 6 is one of schematic structural diagrams of two groups of dragging blocks provided in this embodiment;

fig. 7 is a second schematic structural diagram of the two dragging block sets provided in this embodiment;

fig. 8 is a schematic view of the overall structure of the metal pulling plate provided in this embodiment.

Reference numerals: 1. a plastic body; 11. an arc-shaped slot; 12. an arc-shaped block; 13. a limiting block; 14. a fan-shaped limiting groove; 141. the inner wall surface of the groove body; 15. fixing a column; 151. a clamping block; 16. positioning a groove; 17. positioning blocks; 18. a scarf block; 2. a baffle plate; 21. fixing grooves; 22. a card slot; 3. a metal pulling plate; 31. a support pillar; 32. a support hole; 33. embedding holes; 4. a first chute; 5. a second chute; 6. a first slider; 7. a second slider; 8. a slide bar; 9. a sliding baffle; 100. groups of dragging blocks.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the present invention described above may be combined with each other as long as they do not conflict with each other.

A long-distance anti-collapse drag chain compounded by metal and plastic is disclosed, as shown in figures 1-4, comprising a plurality of drag block groups 100, the plurality of drag block groups 100 are in limit hinge joint, the drag block group 100 comprises two plastic main bodies 1 with symmetrical structure and symmetrical position, blocking pieces 2 which are respectively arranged at the upper side and the lower side of the plastic main body 1 and are used for connecting the two plastic main bodies 1 and bearing foreign objects, and a metal pulling plate 3 which is used for connecting and supporting the plurality of drag block groups 100, the metal pulling plate 3 is embedded at the lower side of the plastic main body 1, one end of the metal pulling plate is provided with a supporting column 31, the other end of the metal pulling plate is provided with a supporting hole 32, the supporting hole 32 is arranged through the plastic main body 1, the supporting hole 32 is matched with the supporting column 31, the plastic main body 1 is provided with an arc-shaped groove 11, one end of the plastic main body 1 is extended with an arc-shaped block 12, the, the arc-shaped grooves 11 and the arc-shaped blocks 12 of the plastic main body 1 on the same side of the two connected dragging block groups 100 slide with each other.

In the specific implementation process, the metal and plastic composite long-distance non-collapse drag chain is formed by connecting a plurality of drag block groups 100, each drag block group 100 comprises a plastic main body 1, a baffle 2 and a metal pull plate 3, the two plastic main bodies 1 distributed at the two ends of the baffle 2 are structurally symmetrical to each other, correspondingly, the two baffles 2 are respectively arranged at the upper side and the lower side of the plastic main body 1, namely, the cable or the pipeline arranged in the drag chain is loaded through the upper baffle 2 and the lower baffle 2, the metal pull plate 3 embedded at the lower side of the plastic main body 1 is used for connecting the plastic main bodies 1 at the same side of the plurality of drag block groups 100, namely, the drag block groups 100 are hinged through matching a support column 31 at one end with a support hole 32 at the other end, specifically, in the drag chain comprising the plurality of drag block groups 100, the support column 31 of the metal pull plate 3 relatively positioned at the rear part 100 is matched with the support hole 32 of the metal pull plate 3 positioned at the drag block, thus, the connection of multiple groups of dragging blocks 100 is realized.

Further, as shown in fig. 6, through arc wall 11 and arc piece 12 phase-match, make two homonymy plastic main parts 1 agree with each other, it needs to explain, combine the arc structure of arc wall 11 and arc piece 12, when arc piece 12 is arranged in arc wall 11 completely and two liang of inner walls looks butt, the upper and lower side reason between two plastic main parts 1 keeps the level, promptly under the support of support column 31, the metal arm-tie 3 that is located plastic main part 1 downside can share the gravity that drags block group 100's self gravity and separation blade 2 bore for the longitudinal tension of metal arm-tie 3, thereby the jacking force between cooperation arc piece 12 and locating piece 17 improves the load-carrying capacity of drag chain, also can prevent the waist phenomenon that collapses of long distance drag chain.

As shown in fig. 2, 3 and 5, the baffle plate 2 is a flat structure, fixing grooves 21 are respectively formed at two ends of the baffle plate 2, fixing columns 15 are fixedly connected to the inner walls of the upper side and the lower side of the plastic main body 1 and located at the positions of the baffle plate 2, and the fixing columns 15 are sleeved in the fixing grooves 21 and matched with the fixing grooves 21.

In the specific implementation process, one side an organic whole at fixed column 15 is connected with fixture block 151, draw-in groove 22 has been seted up to the fixed slot 21 symmetry that is located its both ends in one side of separation blade 2, draw-in groove 22 and fixture block 151 joint, draw-in groove 22 keeps apart from the both ends summit of separation blade 2 and has kept apart, make separation blade 2 and 1 fixed connection of plastic main part through fixed column 15 and fixed slot 21 phase-match promptly, and simultaneously, the draw-in groove 22 of joint and the further reinforcing of fixture block 151 separation blade 2 and the firm in connection degree of plastic main part 1, the load capacity of tow chain has been improved.

It should be noted that one end of the fixing post 15 away from the fixing groove 21 is perpendicular to the inner wall of the plastic main body 1.

As shown in fig. 3, 4 and 7, a limiting block 13 is disposed at one end of the plastic main body 1 and located at the arc-shaped block 12, a fan-shaped limiting groove 14 is disposed at the other end of the plastic main body 1 and close to the arc-shaped groove 11, and the limiting block 13 slides in the fan-shaped limiting groove 14 and abuts against the inner wall surfaces 141 of the groove bodies at two sides of the fan-shaped limiting groove 14.

In the specific implementation process, the long-distance drag chain correspondingly bends and deforms along with the displacement of the environment and equipment when working, namely, under the support of the support column 31, the limit block 13 slides in the fan-shaped limit groove 14 to guide the bending between the two drag block groups 100, so as to realize the opening and closing between the arc-shaped groove 11 and the arc-shaped block 12, the limit block 13 is abutted against the inner wall surface 141 of the groove body of the fan-shaped limit groove 14 to limit the bending angle between the drag block groups 100, so as to realize the limit hinging between the multiple drag block groups 100, namely, the support column 31 is used as a lever support to realize the limited bending, the excessive deformation of the drag chain caused by the overlarge bending angle of the drag block group 100 is avoided, the damage of cables or pipelines borne by the baffle plate 2 is avoided, the error friction between the drag block groups 100 can be avoided, the service life and the practicability of the drag chain are improved, meanwhile, the limit block 13 is abutted against the inner wall surface, the method and the device realize that the bearing gravity among the towing block groups 100 is converted into the longitudinal tension at the lower part and the jacking force at the upper part, increase the strength and the bearing capacity of the towing chain, and effectively prevent the towing chain from deforming and collapsing waist.

It should be noted that the specific curvature of the fan-shaped limiting groove 14 depends on the specific application environment, and the specific curvature of the fan-shaped limiting groove 14 is not limited herein.

As shown in fig. 3 and 4, a positioning groove 16 has been seted up at one side edge of arc wall 11, a locating piece 17 is equipped with at one side edge of arc piece 12, positioning groove 16 all is the arc shape design and phase-match with locating piece 17, through this setting promptly, make arc wall 11 and arc piece 12 between a plurality of plastic main parts 1 in the switching in-process, can accurate agree with, also can deepen the firm degree between a plurality of plastic main parts 1 simultaneously, under the prerequisite of cooperation fan-shaped spacing groove 14 and stopper 13, guide arc wall 11 and arc piece 12 slide each other, guarantee to connect closely between a plurality of mop groups 100, stable turn.

Furthermore, a first sliding groove 4 and a second sliding groove 5 are sequentially arranged on one side of the plastic main body 1 and close to the supporting hole 32, a first sliding block 6 and a second sliding block 7 are sequentially arranged on the other side of the plastic main body 1 and close to the supporting column 31, the first sliding block 6 is matched with the first sliding groove 4, the second sliding block 7 is matched with the second sliding groove 5, namely, through the arrangement, the matching between the plurality of drag block groups 100 and the plastic main body 1 on the same side is tighter, on the basis that the supporting column 31 of the metal pulling plate 3 is matched with the supporting hole 32, the connection relationship between the plurality of plastic main bodies 1 and the plurality of drag block groups 100 is strengthened through the arc-shaped groove 11 and the arc-shaped block 12, the limiting block 13 and the fan-shaped limiting groove 14, the positioning groove 16 and the positioning block 17, the first sliding block 6 and the first sliding groove 4, and the second sliding groove 7, and the second sliding groove 5, so that the connection strength and the assembly strength of the, the bearing capacity of the drag chain is improved, and the practicability of the drag chain is improved.

Wherein, still be equipped with slide damper 9 in one side of plastic main part 1 and near second spout 5 department, the other end of plastic main part 1 and near second slider 7 department extend have a slide bar 8, slide bar 8 and slide damper 9 butt, in the opening and closing process of arc wall 11 and arc piece 12, slide bar 8 is sliding connection for slide damper 9, through the opening and closing of slide bar 8 guide arc wall 11 and arc piece 12 promptly, guarantee the opening and closing orbit of arc wall 11 and arc piece 12, the gyration off-centre between the axe positive tow block group 100, guarantee to connect closely between a plurality of tow block groups 100, the gyration is stable.

It should be noted that the plastic body 1 and the baffle 2 are made of plastic material and are formed by one-time injection molding, so as to improve the overall strength of the plastic body 1, and further improve the overall strength of the tow block group 100 and the tow chain.

As shown in fig. 8, the metal pulling plate 3 is made of an aluminum alloy material, a steel material, a copper alloy material or a zinc alloy, so as to satisfy the longitudinal tensile strength carried by the metal pulling plate.

It should be noted that the metal pulling plate 3 is embedded in the lower side of the plastic body 1 and keeps horizontal with the lower side edge of the plastic body 1, that is, the metal and plastic composite structure is used for connection, so as to enhance the firmness of the plastic body 1.

In the concrete implementation process, the scarf joint hole 33 is arranged on the metal pull plate 3 and between the support column 31 and the support hole 32, the plurality of scarf joints 18 are arranged on the lower side of the plastic main body 1 and at the position of the metal pull plate 3, the scarf joints 18 and the plastic main body 1 are integrally formed, and the scarf joints 18 are matched with the scarf joint hole 33, namely, through the arrangement, the scarf joint strength of the metal pull plate 3 and the plastic main body 1 is ensured, the integrity of the metal pull plate 3 and the plastic main body 1 is improved, and further the integral firmness of the towing block group 100 and the towing chain is ensured.

In conclusion, the invention has the following beneficial effects: the invention discloses a long-distance collapse-preventing drag chain compounded by metal and plastic, which consists of a plurality of drag block groups 100, wherein each drag block group 100 comprises a plastic main body 1, a baffle plate 2 and a metal pull plate 3, the metal pull plate 3 is embedded at the lower side of the plastic main body 1, the plastic main bodies 1 are connected with a support hole 32 through a support column 31 of the metal pull plate 3, on the basis, the plastic main bodies are mutually limited and slide through an arc-shaped groove 11 and an arc-shaped block 12, meanwhile, a limiting function is exerted by a limiting block 13 and a fan-shaped limiting groove 14, the baffle plates 2 respectively arranged at the upper side and the lower side of the plastic main body 1 are used for bearing cables or cables, the drag block groups 100 are limited and hinged under the support of the support column 31, the plastic main bodies 1 are supported by a support column 31 in a lever mode and are limited and opened and closed, and further matched with a positioning block 17 through a positioning groove 16, a first slide, the second sliding block 7 is matched with the second sliding groove 5, the connection strength between the plastic main body 1 is improved on the whole, the connection strength between the drag block groups 100 is improved, in the working process of the drag chain, the gravity of the cable or pipeline loaded by the blocking piece 2 acting on the drag block groups 100 is converted into the longitudinal tension of the metal pulling plate 3, the load capacity of the drag chain is improved, the problems of drag chain sagging, falling and fracture are solved, and the service life of the drag chain is prolonged.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. A long-distance anti-collapse drag chain compounded by metal and plastic comprises a plurality of drag block groups, wherein the drag block groups are in limit hinge joint, each drag block group comprises two plastic main bodies which are symmetrical in structure and position, blocking pieces which are respectively arranged at the upper side and the lower side of each plastic main body and are used for connecting the two plastic main bodies and carrying foreign objects, and a metal pull plate which is used for connecting and supporting the plurality of drag block groups, the metal pull plate is embedded at the lower side of the plastic main bodies, one end of the metal pull plate is provided with a supporting column, the other end of the metal pull plate is provided with a supporting hole, the supporting hole penetrates through the plastic main bodies and is matched with the supporting column, an arc-shaped groove is arranged on the plastic main bodies, an arc-shaped block extends at one end of the plastic main bodies, the arc-shaped block and the plastic main bodies are integrally formed, and the arc, under the support of support column, two the homonymy of tow block group that are connected the plastic main part the arc wall with the arc piece slides each other, so that the opening and closing between the plastic main part one end of plastic main part is located arc piece department is equipped with the stopper the other end of plastic main part is close to arc wall department has seted up fan-shaped spacing groove, the stopper is in slide in the fan-shaped spacing groove and respectively with the both sides cell body inner wall butt of fan-shaped spacing groove, so that it is a plurality of lever between the tow block group supports and spacing turn to realize opening and closing the tow block group through metal and plastic complex and utilize the support column, will tow the bearing weight of block group and convert vertical pulling force and the apical force on upper portion of its lower part into, increase tow chain intensity and bearing capacity, effectively prevent that the tow chain from warping and collapsing the waist.

2. The metal and plastic composite long-distance anti-collapse drag chain as claimed in claim 1, wherein the blocking piece is a flat structure, fixing slots are respectively formed at two ends of the blocking piece, fixing posts are fixedly connected to the inner walls of the plastic body at the upper and lower sides and at the blocking piece, and the fixing posts are sleeved in the fixing slots and matched with the fixing slots.

3. The metal and plastic composite long-distance anti-collapse drag chain as claimed in claim 2, wherein a clamping block is integrally connected to one side of the fixing column, clamping grooves are symmetrically formed in the fixing grooves at two ends of one side of the blocking piece, the clamping grooves are clamped with the clamping block, and the distance between the clamping grooves and the vertexes of the two ends of the blocking piece is kept.

4. The metal and plastic composite long-distance anti-collapse drag chain as claimed in claim 3, wherein an end of the fixing column away from the fixing groove is perpendicular to an inner wall of the plastic body.

5. The metal and plastic composite long-distance anti-collapse drag chain as claimed in claim 1, wherein a positioning groove is formed at one side edge of the arc-shaped groove, a positioning block is arranged at one side edge of the arc-shaped block, and the positioning groove and the positioning block are both designed in an arc shape and matched with each other.

6. The metal and plastic composite long-distance anti-collapse drag chain as claimed in claim 1, wherein a first sliding groove and a second sliding groove are sequentially formed at one side of the plastic body near the supporting hole, a first sliding block and a second sliding block are sequentially formed at the other side of the plastic body near the supporting hole, the first sliding block is matched with the first sliding groove, and the second sliding block is matched with the second sliding groove.

7. The metal and plastic composite long-distance anti-collapse drag chain as claimed in claim 1, wherein a sliding baffle is further disposed at one side of the plastic body and near the second sliding groove, and a sliding bar extends at the other end of the plastic body and near the second sliding block, and the sliding bar abuts against the sliding baffle.

8. The metal and plastic composite long distance anti-collapse drag chain of claim 1, wherein the plastic body and the baffle are formed by one-time injection molding.

9. The metal and plastic composite long distance anti-collapse drag chain of claim 1, wherein the metal pulling plate is made of aluminum alloy, steel, copper alloy or zinc alloy.

10. The metal and plastic composite long-distance anti-collapse drag chain as claimed in claim 1, wherein an embedding hole is formed on the metal pull plate and between the support pillar and the support hole, an embedding block is arranged on the lower side of the plastic body and at the metal pull plate, the embedding block and the plastic body are integrally formed, and the embedding block is matched with the embedding hole.

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