A traction device for a cable stranding machine

Abstract

The application relates to the technical field of cable processing, and particularly discloses a traction device for a cable stranding machine, which comprises: multiple groups of air bag fixing mechanisms, a first caterpillar belt conveying mechanism and a second caterpillar belt conveying mechanism; the traction zone is between the first caterpillar belt conveying mechanism and the second caterpillar belt conveying mechanism; the air bag fixing mechanism is composed of two symmetrical semicircular fixing components, and the adjacent surfaces of the circular fixing components are provided with elastic air bags; a separation mechanism is arranged at the outlet end of the traction zone; a folding mechanism is arranged at the inlet end of the traction zone and is used for mutually embedding the two separated semicircular fixing components before the two semicircular fixing components enter the traction zone; each elastic air bag is connected with a gas pump pipe, the elastic air bags between the two groups of symmetrically arranged semicircular fixing components are inflated, the inflated elastic air bags are in contact with the cable, the cable is wrapped by the elastic air bags, and the problem that the cable is extruded and deformed in the moving process due to the rigid connection between the traditional caterpillar belt traction machine and the cable is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable processing, and particularly relates to a traction device for a cable stranding machine. BACKGROUND

[0002] The cable stranding process is a key link in the manufacture of electric wires and cables, and the quality thereof directly determines the electrical performance and mechanical performance of the cable. In this process, the traction device is a core component of the stranding machine, and is responsible for providing stable and continuous traction for the stranding core after stranding, so as to ensure uniform stranding pitch and compact structure.

[0003] At present, a crawler-type traction machine is generally used in the industry to perform this task. The working principle thereof is to clamp the cable by means of two groups of synchronously running crawlers, and to realize traction of the cable by means of the friction force between the crawler clamping blocks and the surface of the cable. Although this mode can provide a large traction force, it has significant disadvantages in actual application: since sufficient normal pressure must be applied to generate the friction traction force, the clamping force is extremely easy to directly act on the cable body, and for a cable core with a soft sheath, a large gap between armors or a loose structure, irreversible mechanical damage is caused. Specifically, the cable is excessively extruded, changes from a circular shape to an oval shape, permanent indentations are generated on the surface, and even internal insulation wire cores are deformed, the shielding layer is damaged, and the like. Such damage not only affects the appearance of the product, but also deteriorates the electrical characteristics (such as characteristic impedance fluctuation and capacitance imbalance) of the cable, and buries long-term use faults, thereby seriously reducing the reliability and service life of the product.

[0004] Therefore, the prior art urgently needs a new type of traction device which can not only provide sufficient and stable traction force, but also completely avoid extrusion damage to the surface of the cable. SUMMARY

[0005] The traction device for a cable stranding machine provided by the embodiment of the present application solves the problem that the conventional crawler-type traction device is easy to cause the cable to be crushed during the working process.

[0006] In a first aspect, the embodiments of the present application provide a traction device for a cable stranding machine, comprising: a plurality of air bag fixing mechanisms, and first and second caterpillar belt conveying mechanisms arranged on both sides of the air bag fixing mechanisms; wherein the first and second caterpillar belt conveying mechanisms are a traction area; the air bag fixing mechanism is composed of two symmetrical semicircular fixing components, and an elastic air bag is arranged on the adjacent surfaces of the two semicircular fixing components, and the adjacent surfaces of the two elastic air bags are in frictional fit with the outer circumferential wall of the cable; a separation mechanism is arranged at the outlet end of the traction area, and is used for separating the air bag fixing mechanisms after they pass through the traction area and placing them on the side of the first and second caterpillar belt conveying mechanisms away from the traction area; a folding mechanism is arranged at the inlet end of the traction area, and is used for embedding the separated two semicircular fixing components into each other before they enter the traction area; and each elastic air bag is connected with a pump pipe.

[0007] In a possible implementation, the first caterpillar belt conveying mechanism and the second caterpillar belt conveying mechanism are each composed of a caterpillar belt mechanism and a plurality of telescopic fitting blocks; the telescopic fitting blocks are arranged on the caterpillar belt plates of the caterpillar belt mechanism; the telescopic fitting blocks are matched with the semicircular fixing components, and are used for driving the semicircular fixing components to move in the traction area; wherein the telescopic fitting block comprises: a mounting block connected with the caterpillar belt plate by bolts; a spring rod connected with the mounting block at one end; and an anti-skid block connected with the other end of the spring rod, and the anti-skid block is in abutment with the semicircular fixing component.

[0008] In a possible implementation, the semicircular fixing component comprises: a semicircular cylindrical shell, the opening surfaces of the two semicircular fixing components are arranged opposite to each other; a flat plate arranged on the side of the semicircular cylindrical shell away from the opening surface; two groups of sliding grooves arranged on the outer walls of the two sides of the semicircular cylindrical shell; and two groups of sealing plates which are detachably arranged at the two ends of the semicircular cylindrical shell; wherein each elastic air bag is arranged on the inner wall of the opening surface of the semicircular cylindrical shell; a plurality of bosses are arranged on the outer wall of the semicircular cylindrical shell along the length direction of the semicircular cylindrical shell; and the opening ends of the two semicircular cylindrical shells are respectively provided with limiting protrusions and limiting recesses.

[0009] In a possible implementation, the first caterpillar belt conveying mechanism and the second caterpillar belt conveying mechanism are arranged on a mounting rack, and the mounting rack comprises: a plurality of vertical plates arranged on both sides of the first caterpillar belt conveying mechanism and the second caterpillar belt conveying mechanism; and a first guide rail arranged on the side of the vertical plate close to the first caterpillar belt conveying mechanism and the second caterpillar belt conveying mechanism.

[0010] In a possible implementation, the separating mechanism and the folding mechanism each include a linkage mechanism, a guide mechanism, and a pushing mechanism, and the linkage mechanism is symmetrically provided with two groups of guide mechanisms; the guide mechanism includes a second guide rail, which is provided on one side of the first guide rail; a folding plate, which is provided at the middle section of the second guide rail and is connected with the output end of the linkage mechanism; the linkage mechanism includes an extension plate, which is provided at the end wall of the vertical plate and extends horizontally to the direction of the second guide rail; a mounting shaft, which is provided at the end of the extension plate away from the vertical plate; a sector-shaped tooth, which is fixedly connected with the circumferential outer wall of the mounting shaft at the mounting end, and the tooth surfaces of the sector-shaped teeth of the two groups of linkage mechanisms are engaged; a first linkage, which is fixedly connected with one side of the mounting end of the sector-shaped tooth; a second linkage, which is hingedly connected with the other end of the first linkage; a magnet switch mechanism, which is rotatably provided at the other end of the second linkage; an inclined slot, which is provided at the side wall of the semicircular fixed assembly and is matched with the surface of the magnet switch mechanism away from the second linkage; a third linkage and a fourth linkage, which are parallelly provided at one side of the sector-shaped tooth, one end of the third linkage and one end of the fourth linkage are hingedly connected to the surface of the extension plate, and the other end of the third linkage and the other end of the fourth linkage are hingedly connected to the surface of the folding plate; a curved rod, which is provided at one side of the sector-shaped tooth close to the third linkage, and the other end of the curved rod is abutted with the side wall of the third linkage; wherein one end of the third linkage is sleeved on the circumferential outer wall of the mounting shaft, and a return torsional spring is arranged between the third linkage and the mounting shaft.

[0011] In a possible implementation, the magnet switch mechanism includes a first magnet, which is rotatably mounted at the end of the second linkage away from the first linkage; a telescopic rod, which is mounted at one end of the first magnet away from the second linkage; and a second magnet, which is provided at the other end of the telescopic rod; and the switch of the air pump is arranged in the inclined slot.

[0012] In a possible implementation, the pushing mechanism includes a reciprocating mechanism and a driving mechanism; the reciprocating mechanism is provided with two groups, and the two groups of reciprocating mechanisms are respectively arranged at the upper portion and the lower portion of the mounting frame; the reciprocating mechanism includes a horizontal rod, which is arranged at the upper portion of the mounting frame; a plurality of elastic push plates, which are respectively and separately arranged at the bottom surfaces of the two ends of the horizontal rod; two groups of first hinged blocks, which are respectively arranged at the two ends of the surface of the horizontal rod; a swing rod, which is hingedly connected at one end of the first hinged block; and a rotating shaft, which is fixedly connected at one end of the swing rod; and the driving mechanism is drivingly connected with the rotating shaft.

[0013] In a possible implementation, the driving mechanism comprises: a driving motor mounted on the upper part of the mounting frame; a first pulley provided on the output shaft of the driving motor; four sets of second pulleys, each of which is mounted on the rotating shaft of one of the two reciprocating mechanisms; two of the second pulleys are connected to the first pulley through a first synchronous belt, and the other two of the second pulleys are connected to each other through a second synchronous belt; two sets of third pulleys, each of which is mounted on one of the two sets of second pulleys; a redirecting wheel provided on the outer wall of the mounting frame; and the redirecting wheel is connected to the two sets of third pulleys through a third synchronous belt.

[0014] In a possible implementation, the driving mechanism further comprises two sets of reciprocating driving assemblies for driving the fan-shaped teeth of the separating mechanism and the folding mechanism to reciprocate, respectively; each of the reciprocating driving assemblies comprises: a fourth pulley provided on the outer wall of the mounting frame; the fourth pulley is connected to the third pulley through a fourth synchronous belt; an eccentric rod rotatably connected to the outer wall of the fourth pulley; a rack rotatably connected to the other end of the eccentric rod; a reciprocating track mounted on the outer wall of the mounting frame, and the rack is slidably arranged in the reciprocating track; and a gear fixedly mounted on the end of the rotating shaft away from the extension plate, and the gear is engaged with the rack.

[0015] In a possible implementation, the semi-cylindrical shell is provided with an inflation hole, one end of the inflation hole is in communication with the outer wall; and a quick-connection valve is arranged at the end of the inflation hole close to the outer wall of the semi-cylindrical shell; the inflation hole is in communication with each of the elastic air bags, and an electromagnetic valve is arranged between each of the elastic air bags and the inflation hole.

[0016] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0017] When the plurality of single-core cables are stranded by the stranding system, the stranded plurality of cables are wound with the banding material by the banding system, the plurality of cables after winding are placed at the inlet end of the traction area, the two sets of symmetrically arranged semi-circular fixing assemblies at the inlet end are driven by the folding mechanism and approached, a cylindrical cavity is formed between the two sets of semi-circular fixing assemblies, the air bag fixing assembly after folding is driven by the first track conveyor and the second track conveyor to move in the traction area from the inlet end to the outlet end, when the section of cable completely enters the traction area, the air pump works to inflate each of the elastic air bags through the pipeline, the elastic air bag is inflated and expanded to abut against the circumferential outer wall of the cable, the elastic air bag after inflation drives the cable to move in the traction area through friction until the air bag fixing assembly reaches the outlet end of the traction area.

[0018] When the air bag fixing assembly reaches the outlet end, the separation mechanism works to separate the two groups of semicircular fixing assemblies folded by the folding mechanism, and the two groups of semicircular fixing assemblies are separated upward or downward along the horizontal plane. The air in the elastic air bag is quickly exhausted before separation. The separation mechanism functions to lift the two groups of semicircular fixing assemblies to the two sides. The lifted semicircular fixing assemblies are flush with the side of the first crawler belt conveying mechanism away from the traction area. When the first crawler belt conveying mechanism works, it will push the lifted semicircular fixing assemblies to the inlet end of the traction area.

[0019] The air bag fixing assembly is provided with multiple groups, and the multiple groups of air bag fixing assemblies move in the traction area and on the side of the first crawler belt conveying mechanism and the second crawler belt conveying mechanism away from the traction area to achieve the traction effect on the cable.

[0020] The traction force acts on the cable indirectly through the elastic air bag, realizing non-hard contact of the traction device with the surface of the cable, eliminating all surface damage risks such as indentation, deformation, and scratch caused by direct clamping of the traditional crawler belt traction machine. At the same time, the elastic air bag can self-adaptively wrap the entire circumference of the cable after inflation, providing uniformly distributed pressure, so that the traction force is uniformly applied to the cable sheath, avoiding excessive local pressure that causes damage to the soft sheath material during traction.

[0021] The work of a single air bag fixing mechanism is intermittent, but the continuous traction process of the entire cable is realized through the cyclic operation of multiple groups of mechanisms. The way of wrapping with air bags can avoid the entry of particles and debris into the contact surface when the crawler belt traction machine directly contacts the cable, which causes damage to the surface of the cable. Multiple elastic air bags are independently provided, and each elastic air bag is connected to a separate air pump. When some air bags are aged and cannot inflate to the required volume, the remaining elastic air bags can still provide stable friction and pressure, so that the replacement cost is low, the equipment durability is strong, and the maintenance is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application or the prior art. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0023] Figure 1 The traction device structure schematic diagram provided for the embodiments of the present application;

[0024] Figure 2 The Figure 1 enlarged schematic diagram of the A area in the middle;

[0025] Figure 3 The semicircular fixing assembly structure schematic diagram provided for the embodiments of the present application;

[0026] Figure 4 A schematic diagram of a connecting rod mechanism structure provided for an embodiment of the present application;

[0027] Figure 5 A schematic diagram of a magnet switch mechanism structure provided for an embodiment of the present application;

[0028] Figure 6 A schematic diagram of a pushing mechanism structure provided for an embodiment of the present application;

[0029] Figure 7 A schematic diagram of a reciprocating mechanism structure provided for an embodiment of the present application;

[0030] Figure 8 A schematic diagram of a driving mechanism structure provided for an embodiment of the present application;

[0031] Figure 9 A schematic diagram of a reciprocating driving assembly structure provided for an embodiment of the present application.

[0032] Icon:

[0033] 100 - air bag fixing mechanism;

[0034] 110 - semicircular fixing assembly;

[0035] 111 - semicircular cylindrical shell; 112 - flat plate; 113 - sliding groove; 114 - sealing plate; 115 - boss; 116 - limiting protrusion; 117 - limiting groove; 118 - inflation hole; 119 - quick connection valve;

[0036] 120 - elastic air bag;

[0037] 200a - first crawler belt conveying mechanism; 200b - second crawler belt conveying mechanism;

[0038] 210 - crawler belt mechanism;

[0039] 220 - telescopic matching block;

[0040] 221 - mounting block; 222 - spring rod; 223 - anti-skid block;

[0041] 230 - crawler belt plate;

[0042] 300 - traction area;

[0043] 400a - separation mechanism;

[0044] 410 - connecting rod mechanism;

[0045] 411 - extension plate; 412 - mounting shaft; 413 - sector tooth; 414 - first connecting rod; 415 - second connecting rod;

[0046] 416 - magnet switch mechanism; 4161 - first magnet; 4162 - telescopic rod; 4163 - second magnet;

[0047] 417 - chute; 418 - third connecting rod; 419 - fourth connecting rod; 4101 - curved rod;

[0048] 420 - guiding mechanism;

[0049] 421 - second guide rail; 422 - folding plate;

[0050] 430 - pushing mechanism;

[0051] 431 - reciprocating mechanism;

[0052] 4311 - horizontal rod; 4312 - elastic push plate; 4313 - first hinged block; 4314 - swing rod; 4315 - rotating shaft;

[0053] 432 - driving mechanism;

[0054] 4321 - driving motor; 4322 - first pulley; 4323 - second pulley; 4324 - first synchronous belt; 4325 - third pulley; 4326 - deflection wheel; 4327 - third synchronous belt;

[0055] 433 - reciprocating driving assembly;

[0056] 4331 - fourth pulley; 4332 - fourth synchronous belt; 4333 - eccentric rod; 4334 - rack; 4335 - reciprocating track; 4336 - gear;

[0057] 400b - folding mechanism;

[0058] 500 - mounting frame;

[0059] 510 - vertical plate; 520 - first guide rail. DETAILED DESCRIPTION

[0060] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0061] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0062] Embodiment 1

[0063] Please refer to Figures 1-9 A traction device for a cable stranding machine, comprising: a plurality of air bag fixing mechanisms 100, and first and second caterpillar conveyor mechanisms 200a and 200b arranged on both sides of the air bag fixing mechanisms 100; wherein the first and second caterpillar conveyor mechanisms 200a and 200b are a traction area 300; the air bag fixing mechanism 100 is composed of two symmetrical semicircular fixing assemblies 110, the adjacent surfaces of the two semicircular fixing assemblies 110 are provided with elastic air bags 120, and the adjacent surfaces of the two groups of elastic air bags 120 are frictionally matched with the outer circumferential wall of the cable; a separation mechanism 400a is arranged at the outlet end of the traction area 300, and is used for separating and placing the air bag fixing mechanisms 100 after passing through the traction area 300 on one side away from the traction area 300; a folding mechanism 400b is arranged at the inlet end of the traction area 300, and is used for mutually embedding the two semicircular fixing assemblies 110 before entering the traction area 300; each elastic air bag 120 is connected with a gas pump pipe.

[0064] In the above embodiment, after the plurality of single-core cables are stranded by the stranding system, the stranded plurality of cables are wound with the banding material by the banding system, the plurality of cables wound are placed at the entrance end of the traction zone 300, the two groups of symmetrically arranged semicircular fixing assemblies 110 at the entrance end are driven to close by the closing mechanism 400b, a cylindrical cavity is formed between the two groups of semicircular fixing assemblies 110, the closed air bag fixing assembly is driven by the first track conveying mechanism 200a and the second track conveying mechanism 200b to move in the traction zone 300 from the entrance end to the exit end, when the section of cable completely enters the traction zone 300, the air pump works, and each elastic air bag 120 is inflated through the pipeline, the elastic air bag 120 is inflated and expanded, and abuts against the circumferential outer wall of the cable, the elastic air bag 120 after inflation drives the cable to move in the traction zone 300 through friction until the air bag fixing assembly reaches the exit end of the traction zone 300;

[0065] When the air bag fixing assembly reaches the exit end, the separating mechanism 400a works to separate the two groups of semicircular fixing assemblies 110 closed by the closing mechanism 400b, the two groups of semicircular fixing assemblies 110 are separated upward or downward along the horizontal plane, the air in the elastic air bag 120 is rapidly exhausted before separation, and the separating mechanism 400a functions to lift the two groups of semicircular fixing assemblies 110 to the two sides, the lifted semicircular fixing assemblies 110 are flush with the side of the first track conveying mechanism 200a away from the traction zone 300, and the first track conveying mechanism 200a works to push the lifted semicircular fixing assemblies 110 to the entrance end of the traction zone 300;

[0066] The air bag fixing assembly is provided with a plurality of groups, and the plurality of groups of air bag fixing assemblies are circularly moved in the traction zone 300 and on the side of the first track conveying mechanism 200a and the second track conveying mechanism 200b away from the traction zone 300 to achieve the traction effect on the cable.

[0067] The traction force indirectly acts on the cable through the elastic air bag 120, realizes the non-hard contact between the traction device and the surface of the cable, eliminates all surface damage risks such as indentation, deformation and scratch caused by direct clamping of the traditional track traction machine, and at the same time, the elastic air bag 120 after inflation can self-adaptively wrap the entire circumference of the cable to provide uniformly distributed pressure, so that the traction force uniformly acts on the cable sheath to avoid excessive local pressure to damage the soft sheath material during traction;

[0068] The working of the single air bag fixing mechanism 100 is intermittent, but the cyclic operation of multiple sets of mechanisms makes the traction process of the entire cable continuous. The air bag wrapping method can avoid the entry of particulate debris into the contact surface of the track traction machine when it is in direct contact with the cable, which can cause damage to the surface of the cable. The elastic air bags 120 are independently provided in multiple numbers, and each elastic air bag 120 is connected to a separate air pump. When some air bags are aged and cannot be inflated to the required volume, the remaining elastic air bags 120 can also provide stable friction and pressure, so that the replacement cost is low, the equipment is durable, and the maintenance is more convenient.

[0069] Embodiment 2

[0070] Please refer to Figures 1-9 The first track conveying mechanism 200a and the second track conveying mechanism 200b are both composed of a track mechanism 210 and a telescopic cooperation block 220. The telescopic cooperation block 220 is provided with a plurality of telescopic cooperation blocks 220, and the plurality of telescopic cooperation blocks 220 are respectively installed on each track plate 230 of the track mechanism 210. The telescopic cooperation block 220 cooperates with the semicircular fixed assembly 110 to drive the semicircular fixed assembly 110 to move in the traction area 300. The telescopic cooperation block 220 includes: a mounting block 221 connected to the track plate 230 by bolts; a spring rod 222 connected to one end of the mounting block 221; and an anti-skid block 223 connected to the other end of the spring rod 222, wherein the anti-skid block 223 abuts against the semicircular fixed assembly 110.

[0071] In the above embodiment, the first track conveying mechanism 200a and the second track conveying mechanism 200b are symmetrically and spaced apart on the upper and lower parts of the horizontal plane. When the track mechanism 210 is working, it drives a plurality of linked track plates 230 to move, and then drives the telescopic cooperation blocks 220 installed thereon to move through the track plates 230. Each telescopic cooperation block 220 is inclined to the surface of the semicircular fixed assembly 110. The spring rod 222 of the telescopic cooperation block 220 is used to buffer when it contacts the semicircular fixed assembly 110, and at the same time, it improves the problem of excessive pressing when the semicircular fixed assembly 110 is rigidly connected. The anti-skid block 223 abuts against the surface of the semicircular fixed assembly 110, and pushes the semicircular fixed assembly 110 to move through the anti-skid block 223.

[0072] Embodiment 3

[0073] Please refer to Figures 1-9The semicircular fixing assembly 110 comprises a semicylindrical shell 111, two groups of the semicylindrical shell 111 are oppositely arranged at the opening surfaces; a flat plate 112 is arranged at the side of the semicylindrical shell 111 away from the opening surface; two groups of sliding grooves 113 are arranged at the outer walls of the semicylindrical shell 111; two groups of sealing plates 114 are respectively detachably installed at the two ends of the semicylindrical shell 111; wherein each elastic air bag 120 is uniformly arranged at the inner wall of the opening surface of the semicylindrical shell 111; a plurality of bosses 115 are arranged at the outer wall of the semicylindrical shell 111 along the length direction of the semicylindrical shell 111, and the opening ends of the two groups of semicylindrical shells 111 are respectively provided with limiting protrusions 116 and limiting grooves 117.

[0074] In the above embodiment, the elastic air bags 120 uniformly arranged at the opening surface of the semicylindrical shell 111 are in frictional cooperation with the cable, when the two semicylindrical shells 111 are driven to approach each other by the folding mechanism 400b, the limiting protrusion 116 arranged at the opening end of one semicylindrical shell 111 is embedded into the limiting groove 117 at the opening end of the other semicylindrical shell 111, the limiting protrusion 116 and the limiting groove 117 are provided with a plurality of and are arranged at intervals along the length direction of the opening ends of the semicylindrical shell 111, the limiting protrusion 116 is embedded into the limiting groove 117, which is used for fixing the two semicylindrical shells 111, avoiding the relative displacement of the two semicylindrical shells 111 during the movement, causing the local change of the friction force on the cable, causing the cable to be scratched, the flat plate 112 is installed on the side of the semicylindrical shell 111 away from the opening surface, the side of the flat plate 112 away from the semicylindrical shell 111 is used for installing each boss 115, the surface of each boss 115 is inclined to the anti-skid block 223 of the telescopic cooperation block 220, which is used for pushing the semicylindrical shell 111 by the inclined anti-skid block 223.

[0075] Embodiment 4

[0076] Please refer to Figures 1-9 The first caterpillar conveying mechanism 200a and the second caterpillar conveying mechanism 200b are installed on the mounting rack 500, and the mounting rack 500 comprises a plurality of vertical plates 510, the plurality of vertical plates 510 are respectively arranged at the two sides of the first caterpillar conveying mechanism 200a and the second caterpillar conveying mechanism 200b; a first guide rail 520 is arranged at the side of the vertical plate 510 close to the first caterpillar conveying mechanism 200a and the second caterpillar conveying mechanism 200b.

[0077] In the above embodiment, the mounting frame 500 is used to mount the first and second caterpillar conveying mechanisms 200a and 200b, and the vertical plate 510 of the mounting frame 500 is used to slide and limit the semi-cylindrical shell 111 in the traction area 300. When the two semi-cylindrical shells 111 are folded, the first guide rail 520 mounted on the vertical plate 510 is used to limit the semi-cylindrical shells 111 to avoid shaking in the horizontal plane during movement. When the semi-cylindrical shells 111 slide, they slide on the two first guide rails 520 through the sliding grooves 113 on the two sides. When the two semi-cylindrical shells 111 enter the traction area 300, the first guide rail 520 limits the two semi-cylindrical shells 111. Then, the elastic air bag 120 is inflated, and the spring rod 222 pushes the two semi-cylindrical shells 111 to approach each other through the anti-skid block 223. The sliding groove 113 and the first guide rail 520 have a gap.

[0078] Embodiment 5

[0079] Please refer to Figures 1-9 The separating mechanism 400a and the folding mechanism 400b each include a connecting rod mechanism 410, a guide mechanism 420, and a pushing mechanism 430. The connecting rod mechanism 410 and the guide mechanism 420 are symmetrically provided in two groups. The guide mechanism 420 includes a second guide rail 421, which is provided on one side of the first guide rail 520, and a folding plate 422, which is provided on the middle section of the second guide rail 421 and is connected with the output end of the connecting rod mechanism 410. The connecting rod mechanism 410 includes an extension plate 411, which is provided on the end wall of the vertical plate 510 and extends horizontally to the second guide rail 421, a mounting shaft 412, which is provided on the end of the extension plate 411 away from the vertical plate 510, a fan-shaped tooth 413, which is fixedly connected with the mounting end of the mounting shaft 412 and has a tooth surface that engages with the tooth surface of the fan-shaped tooth 413 of the other connecting rod mechanism 410, a first connecting rod 414, which is fixedly connected with one end of the mounting end of the fan-shaped tooth 413, a second connecting rod 415, which is hingedly connected with the other end of the first connecting rod 414, a magnet switch mechanism 416, which is rotatably provided on the other end of the second connecting rod 415, an inclined groove 417, which is provided on the side wall of the semi-cylindrical fixed assembly 110 and cooperates with the surface of the magnet switch mechanism 416 away from the second connecting rod 415, a third connecting rod 418 and a fourth connecting rod 419, which are parallelly provided on one side of the fan-shaped tooth 413 and are hingedly connected with the surface of the extension plate 411 at one end and with the surface of the folding plate 422 at the other end, and a curved rod 4101, which is provided on one side of the fan-shaped tooth 413 close to the third connecting rod 418 and abuts against the side wall of the third connecting rod 418 at the other end. One end of the third connecting rod 418 is sleeved on the circumferential outer wall of the mounting shaft 412, and a return torsional spring is mounted between the third connecting rod 418 and the mounting shaft 412.

[0080] In the above embodiment, the connecting rod mechanism 410 is used to push the two sets of guide mechanisms 420 to open to both sides, so that the semicircular fixed assembly 110 arranged on the second guide rail 421 can be separated. When the connecting rod mechanism 410 works, the sector tooth 413 is driven to rotate by the mounting shaft 412. Since the two sector teeth 413 are meshed with each other, the two sector teeth 413 can synchronously drive the first connecting rod 414 to swing away from the vertical plate 510. When the first connecting rod 414 swings, the second connecting rod 415 is pushed to work, so that the position of the end of the second connecting rod 415 away from the first connecting rod 414 changes. When the second connecting rod 415 works, the magnet switch mechanism 416 moves away from the vertical plate 510. When the magnet switch mechanism 416 reaches the inclined groove 417, it is embedded in the inclined groove 417. The magnet switch mechanism 416 can push the semicircular fixed assembly 110 to move away from the vertical plate 510, so that the semicircular fixed assembly 110 can completely slide into the second guide rail 421 after being separated from the first crawler conveyor mechanism 200a, so that the semicircular fixed assembly 110 is completely separated from the first guide rail 520;

[0081] When the sector tooth 413 continuously rotates around the mounting shaft 412, the first connecting rod 414 and the second connecting rod 415 are in the same straight line, and the distance between the magnet switch mechanism 416 and the sector tooth 413 is the largest. When the sector tooth 413 continues to rotate, the first connecting rod 414 pulls the second connecting rod 415 to move towards the vertical plate 510, so that the magnet switch mechanism 416 installed at the end of the second connecting rod 415 is separated from the inclined groove 417, so that the magnet switch mechanism 416 does not block the two semicircular fixed assemblies 110 when they move away from each other;

[0082] Subsequently, the curved rod 4101 installed on one side of the sector tooth 413 abuts against one side of the third connecting rod 418, thereby pushing the third connecting rod 418 to swing away from the vertical plate 510. The third connecting rod 418 and the fourth connecting rod 419 are arranged in parallel, so that the third connecting rod 418 and the fourth connecting rod 419 drive the folding plates 422 to move away from each other. In this process, the restoring torsion spring force increases. When the two sets of semicircular fixed assemblies 110 are flush with the side of the traction area 300 away from the first crawler conveyor mechanism 200a, the pushing mechanism 430 pushes the semicircular fixed assembly 110 to the surface of the first crawler conveyor mechanism 200a, so that the first crawler conveyor mechanism 200a can transport the separated semicircular fixed assembly 110 to the entrance end of the traction area 300;

[0083] The sector gear 413 of the closing mechanism 400b swings to drive the third link 418 and the fourth link 419 to drive the closing plates 422 to move away from each other, so that the second guide rail 421 installed on the closing plates 422 is opened. When the semicircular fixed assembly 110 is carried by the first crawler belt conveying mechanism 200a to the entrance end of the traction area 300, the semicircular fixed assembly 110 is pushed to slide into the second guide rail 421 of the closing mechanism 400b by the pushing mechanism 430. The third link 418 and the fourth link 419 are swung in the opposite direction to drive the two closing plates 422 to move close to each other, so that the two semicircular fixed assemblies 110 at the entrance end are closed into the traction area 300. The reset torsion spring is used to reset the third link 418 and the fourth link 419.

[0084] Embodiment 6

[0085] Please refer to Figures 1-9 The magnet switch mechanism 416 includes: a first magnet 4161 rotatably installed at one end of the second link 415 away from the first link 414; an extension rod 4162 installed at one end of the first magnet 4161 away from the second link 415; a second magnet 4163 provided at the other end of the extension rod 4162; and a switch of the air pump provided in the chute 417.

[0086] In the above embodiment, when the second magnet 4163 is embedded in the chute 417, the switch of the air pump is pushed to turn on the power supply of the air pump. When the air pump is started, the elastic air bag 120 in the semicircular fixed assembly 110 at the exit end of the traction area 300 is exhausted, and the elastic air bag 120 at the entrance end is inflated. The opening end of the chute 417 close to one side of the vertical plate 510 and close to one side of the link mechanism 410 has a slope, so that the second magnet 4163 can smoothly move out of the chute 417 when moving towards the vertical plate 510. The second magnet 4163 repels the first magnet 4161, and the extension rod 4162 is used to move the second magnet 4163 towards the first magnet 4161 when the second magnet 4163 moves out of the chute 417. The second magnet 4163 is pushed by the repulsive force between the second magnet 4163 and the first magnet 4161 to smoothly enter the chute 417.

[0087] Embodiment 7

[0088] Please refer to Figures 1-9The pushing mechanism 430 comprises a reciprocating mechanism 431 and a driving mechanism 432. The reciprocating mechanism 431 comprises two groups, which are arranged at the upper and lower parts of the mounting frame 500 respectively. The reciprocating mechanism 431 comprises a horizontal rod 4311 arranged at the upper part of the mounting frame 500, a plurality of elastic push plates 4312 arranged at the bottom surfaces of the two ends of the horizontal rod 4311 respectively, a first hinged block 4313 arranged at each end of the surface of the horizontal rod 4311, a swing rod 4314 hingedly connected to the first hinged block 4313, and a rotating shaft 4315 fixedly connected to one end of the swing rod 4314 and the other end of the driving mechanism 432.

[0089] In the above embodiment, the second guide rail 421 of the folding mechanism 400b is provided with a blocking strip at one end away from the stand 510, which is used to align the two groups of semicircular fixed components 110 before entering the traction area 300 by the pushing mechanism 430. When the pushing mechanism 430 works, the driving mechanism 432 starts and drives the reciprocating mechanism 431 to work, and then the rotating shaft 4315 rotates to drive the swing rod 4314 to make circular motion around the axis of the rotating shaft 4315, the other end of the swing rod 4314 drives the first hinged block 4313 to make circular motion around the circumference of the rotating shaft 4315, and then the first hinged block 4313 drives the horizontal rod 4311 to make elliptical motion at one side of the rotating shaft 4315. At the same time, when the elastic push plates 4312 at the two ends of the horizontal rod 4311 are located at the lower half of the elliptical motion track, they push the semicircular fixed components 110 at the inlet and outlet ends of the traction area 300 to move towards the inlet end of the traction area 300. The elastic push plates 4312 are provided with a plurality of elastic push plates, which can be matched with the bosses 115 on the semicircular fixed components 110 one by one, push the bosses 115 to move the semicircular fixed components 110 to contact with the surface of the track mechanism 210, and then the track mechanism 210 realizes the repeated entry and exit of the semicircular fixed components 110 into the traction area 300.

[0090] The pushing mechanism 430 is provided with two groups, which are arranged at the upper and lower parts of the mounting frame 500 respectively, and then the semicircular fixed components 110 located at the upper part of the first track conveying mechanism 200a and the lower part of the second track conveying mechanism are moved by the pushing mechanism 430 arranged symmetrically above and below. When the semicircular fixed components 110 are pushed by the pushing mechanism 430, the semicircular fixed components 110 at the inlet end of the traction area 300 are close to each other at the blocking strip, so that the edges of the two groups of semicircular fixed components 110 are aligned, and then the folding mechanism 400b drives the two groups of second guide rails 421 to swing towards the traction area 300 until the two groups of folding plates 422 are attached, and the limiting bosses 116 of the two groups of semicircular fixed components 110 respectively enter the corresponding limiting grooves 117.

[0091] Embodiment 8

[0092] Referring to Figures 1-9 The driving mechanism 432 comprises a driving motor 4321 installed on the upper portion of the mounting frame 500, a first pulley 4322 provided on the output shaft of the driving motor 4321, four sets of second pulleys 4323, each set of the second pulleys 4323 being installed on the rotating shaft 4315 of each reciprocating mechanism 431, one set of the second pulleys 4323 being drivingly connected to the first pulley 4322 through a first synchronous belt 4324, and the other set of the second pulleys 4323 being drivingly connected through a second synchronous belt, two sets of third pulleys 4325, each set of the third pulleys 4325 being installed on the second pulley 4323, a deflection pulley 4326 provided on the outer wall of the mounting frame 500, and the deflection pulley 4326 being drivingly connected to the two sets of third pulleys 4325 through a third synchronous belt 4327.

[0093] In the above embodiment, the first pulley 4322 is installed on the output shaft of the driving motor 4321, when the driving motor 4321 is started to drive the first pulley 4322 to rotate, the first synchronous belt 4324 is used to drive the two second pulleys 4323 to rotate, when the two sets of second pulleys 4323 rotate, the third pulley 4325 installed on one side of the second pulley 4323 is driven to rotate, the two sets of third pulleys 4325 are used to drive the other set of second pulleys 4323 to work, when the two sets of third pulleys 4325 rotate, the third pulley 4325 matched with the driving motor 4321 drives the other third pulley 4325 to rotate through the third synchronous belt 4327, the middle portion of the third synchronous belt 4327 passes through the deflection pulley 4326, so that the third synchronous belt 4327 is in the shape of "8", the deflection pulley 4326 is used to change the rotating direction of the two ends of the third synchronous belt 4327, so that the rotating directions of the two sets of third synchronous belts 4327 are opposite, and then the two sets of pushing mechanisms 430 symmetrically arranged are used to push the semicircular fixed assembly 110 to move in the same direction.

[0094] Embodiment 9

[0095] Referring to Figures 1-9The driving mechanism 432 further comprises two sets of reciprocating driving assemblies 433 for driving the sector teeth 413 of the separating mechanism 400a and the folding mechanism 400b to reciprocate, respectively. The reciprocating driving assembly 433 comprises a fourth pulley 4331 arranged on the outer wall of the mounting frame 500. The fourth pulley 4331 is drivingly connected to the third pulley 4325 through a fourth synchronous belt 4332. An eccentric rod 4333 is rotatably and eccentrically connected to the outer wall of the fourth pulley 4331. A rack 4334 is rotatably connected to the other end of the eccentric rod 4333. A reciprocating track 4335 is arranged on the outer wall of the mounting frame 500, and the rack 4334 is slidingly arranged in the reciprocating track 4335. A gear 4336 is fixedly arranged on the other end of the rotating shaft 4315 away from the extension plate 411, and the gear 4336 is engaged with the rack 4334.

[0096] In the above embodiment, when the third pulley 4325 is driven to rotate, the two sets of fourth pulleys 4331 are driven to rotate through the fourth synchronous belt 4332, and then the one end of the eccentric rod 4333 is driven to move in a circular motion around the axis of the fourth synchronous belt 4332, so that the one end of the eccentric rod 4333 close to the rack 4334 drives the rack 4334 to move reciprocally in the reciprocating track 4335. The rack 4334 is engaged with the gear 4336, so that the rack 4334 drives the gear 4336 to be intermittently reversed during the reciprocating movement of the rack 4334. Then, the rotating shaft 4315 is driven to be intermittently reversed through the gear 4336, so that the sector teeth 413 fixedly connected to the rotating shaft 4315 are intermittently reciprocated, thereby achieving the purpose of driving the separating mechanism 400a and the folding mechanism 400b to work.

[0097] Embodiment 10

[0098] Please refer to Figures 1-9 The semi-cylindrical shell 111 is provided with an inflation hole 118, one end of the inflation hole 118 being in communication with the outer wall. A quick connection valve 119 is arranged at the end of the inflation hole 118 close to the outer wall of the semi-cylindrical shell 111. The inflation hole 118 is in communication with each elastic air bag 120, and an electromagnetic valve is arranged between each elastic air bag 120 and the inflation hole 118.

[0099] In the above embodiment, when it is necessary to inflate or deflate each elastic air bag 120, a gas pump is connected to the quick connection valve 119 through a pipeline, the pipeline being arranged on the electric telescopic rod 4162. The pipeline is brought into contact with the quick connection valve 119 through the electric telescopic rod 4162. After the quick connection valve 119 is opened, the inflation hole 118 is in communication with the pipeline, and the electromagnetic valve is opened. Each elastic air bag 120 is inflated or deflated through the gas pump. It is a common technical means to bring the pipeline close to or away from the quick connection valve 119 through the electric telescopic rod 4162, and thus the details are not described herein.

[0100] The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments.

[0101] The above examples are only used to illustrate the technical solutions of the present application, and are not limited to the present application; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.

Claims

1. A traction device for a cable forming machine, characterized in that, include: Multiple sets of airbag fixing mechanisms (100), and a first track conveyor (200a) and a second track conveyor (200b) disposed on both sides of the airbag fixing mechanism (100); The traction zone (300) is located between the first tracked conveyor (200a) and the second tracked conveyor (200b). The airbag fixing mechanism (100) consists of two symmetrical semi-circular fixing components (110). The adjacent surfaces of the two semi-circular fixing components (110) are provided with elastic airbags (120), and the adjacent surfaces of the two sets of elastic airbags (120) are in frictional engagement with the outer circumferential wall of the cable. A separation mechanism (400a) is provided at the outlet end of the traction zone (300) for each of the airbag fixing mechanisms (100) to be separated after passing through the traction zone (300) and placed on the side of the first track conveyor (200a) and the second track conveyor (200b) away from the traction zone (300). A closing mechanism (400b) is provided at the entrance end of the traction zone (300) for engaging with each other before the two separated semi-circular fixing components (110) enter the traction zone (300); Each of the aforementioned elastic airbags (120) is connected to an air pump tube; The first track conveyor (200a) and the second track conveyor (200b) are mounted on a mounting frame (500), the mounting frame (500) comprising: Multiple upright plates (510) are provided, and the multiple upright plates (510) are respectively provided on both sides of the first track conveyor (200a) and the second track conveyor (200b); The first guide rail (520) is disposed on the side of the upright plate (510) near the first track conveyor (200a) and the second track conveyor (200b); Both the separation mechanism (400a) and the closing mechanism (400b) include a linkage mechanism (410), a guide mechanism (420), and a pushing mechanism (430), with two sets of linkage mechanisms (410) and guide mechanisms (420) symmetrically arranged. The guiding mechanism (420) includes: The second guide rail (421) is spaced apart on one side of the first guide rail (520); A closing plate (422) is provided in the middle section of the second guide rail (421), and the closing plate (422) is connected to the output end of the linkage mechanism (410); The linkage mechanism (410) includes: An extension plate (411) is provided on the end wall of the upright plate (510) and extends horizontally toward the second guide rail (421); The mounting shaft (412) is located at the end of the extension plate (411) away from the vertical plate (510); The fan-shaped teeth (413) are fixedly connected to the outer circumferential wall of the mounting shaft (412) at the mounting end, and the tooth surfaces of the fan-shaped teeth (413) of the two sets of linkage mechanisms (410) mesh. The first connecting rod (414) is fixedly connected at one end to the mounting end of the sector tooth (413); The second link (415) is hinged at one end to the other end of the first link (414); A magnetic switch mechanism (416) is rotatably located at the other end of the second link (415); A sloping groove (417) is provided on the side wall of the semi-circular fixing assembly (110), and the side of the magnetic switch mechanism (416) away from the second connecting rod (415) cooperates with the sloping groove (417); The third link (418) and the fourth link (419) are arranged parallel to one side of the sector tooth (413). One end of the third link (418) and the fourth link (419) are hinged to the surface of the extension plate (411), and the other end is hinged to the surface of the closing plate (422). A curved rod (4101) has one end located on the side of the sector tooth (413) near the third connecting rod (418), and the other end of the curved rod (4101) abuts against the side wall of the third connecting rod (418). One end of the third link (418) is sleeved on the outer circumferential wall of the mounting shaft (412), and a reset torsion spring is installed between the third link (418) and the mounting shaft (412).

2. The traction device for a cable-forming machine according to claim 1, characterized in that, Both the first tracked conveyor mechanism (200a) and the second tracked conveyor mechanism (200b) are composed of a tracked mechanism (210) and a telescopic cooperation block (220); The telescopic mating block (220) is provided in a plurality of them, and the plurality of telescopic mating blocks (220) are respectively installed on each track plate (230) of the track mechanism (210). The telescopic mating block (220) cooperates with the semi-circular fixing component (110) to drive the semi-circular fixing component (110) to move within the traction area (300). The telescopic mating block (220) includes: Mounting block (221) is bolted to the track plate (230); A spring rod (222) is connected at one end to the mounting block (221); The anti-slip block (223) is connected to the other end of the spring rod (222), and the anti-slip block (223) abuts against the semi-circular fixing component (110).

3. The traction device for a cable-forming machine according to claim 2, characterized in that, The semi-circular fixing component (110) includes: The semi-cylindrical housing (111) of the two sets of semi-circular fixing components (110) are arranged with their opening surfaces facing each other; A flat plate (112) is provided on the side of the semi-cylindrical shell (111) away from its opening surface; The slide groove (113) is provided in two sets, and the two sets of slide groove (113) are respectively provided on the outer walls of the two sides of the semi-cylindrical shell (111); The sealing plate (114) is provided in two sets, and the two sets of sealing plates (114) are respectively detachably installed at both ends of the semi-cylindrical shell (111); Each of the elastic airbags (120) is evenly distributed on the inner wall of the opening surface of the semi-cylindrical shell (111); A plurality of bosses (115) are provided, and the plurality of bosses (115) are spaced apart along the length direction of the semi-cylindrical shell (111) on the outer wall of the semi-cylindrical shell (111); The two sets of semi-cylindrical shells (111) are respectively provided with a limiting protrusion (116) and a limiting groove (117) at their open ends.

4. The traction device for a cable-forming machine according to claim 1, characterized in that, The magnet switching mechanism (416) includes: The first magnet (4161) is rotatably mounted on the end of the second link (415) away from the first link (414); The telescopic rod (4162) is mounted at one end on the side of the first magnet (4161) away from the second connecting rod (415); A second magnet (4163) is located at the other end of the telescopic rod (4162); The switch for the air pump is located in the inclined groove (417).

5. The traction device for a cable-forming machine according to claim 1, characterized in that, The push mechanism (430) includes: Reciprocating mechanism (431) and drive mechanism (432); The reciprocating mechanism (431) is provided in two sets, and the two sets of reciprocating mechanisms (431) are respectively located at the upper and lower parts of the mounting frame (500). The reciprocating mechanism (431) includes: A horizontal bar (4311) is provided on the upper part of the mounting bracket (500); Multiple elastic levers (4312) are provided, and the multiple elastic levers (4312) are respectively spaced at the bottom surfaces of both ends of the horizontal rod (4311); The first hinge block (4313) and two sets of first hinge blocks (4313) are respectively provided at both ends of the surface of the horizontal bar (4311); The swing arm (4314) is hinged at one end to the first hinge block (4313). A rotating shaft (4315) is fixedly connected at one end to the other end of the swing rod (4314); The drive mechanism (432) drives the rotating shaft (4315).

6. The traction device for a cable-forming machine according to claim 5, characterized in that, The drive mechanism (432) includes: A drive motor (4321) is mounted on the upper part of the mounting bracket (500); The first pulley (4322) is located on the output shaft of the drive motor (4321); The second pulley (4323) is provided in four sets, and the four sets of the second pulley (4323) are respectively installed on the rotating shaft (4315) of each of the two sets of reciprocating mechanisms (431); The second pulleys (4323) are in pairs, one pair of which is driven to be connected to the first pulley (4322) via a first synchronous belt (4324), and the other pair of which is driven to be connected via a second synchronous belt; The third pulley (4325) is provided in two sets, and the two sets of the third pulley (4325) are respectively installed on the two sets of the second pulley (4323); A redirecting wheel (4326) is provided on the outer wall of the mounting bracket (500); the redirecting wheel (4326) and the two sets of the third pulleys (4325) are driven and connected by a third synchronous belt (4327).

7. The traction device for a cable-forming machine according to claim 6, characterized in that, The drive mechanism (432) further includes two sets of reciprocating drive components (433), which are used to drive the sector teeth (413) of the separating mechanism (400a) and the closing mechanism (400b) to reciprocate. The reciprocating drive component (433) includes: The fourth pulley (4331) is located on the outer wall of the mounting bracket (500); The fourth pulley (4331) and the third pulley (4325) are connected by a fourth synchronous belt (4332). An eccentric rod (4333) rotates at one end and is eccentrically connected to the outer wall of the fourth pulley (4331); The rack (4334) has one side wall rotatably connected to the other end of the eccentric rod (4333); A reciprocating track (4335) is installed on the outer wall of the mounting frame (500), and the rack (4334) is slidably disposed within the reciprocating track (4335); A gear (4336) is fixedly installed at one end of the shaft (4315) away from the extension plate (411), and the gear (4336) meshes with the rack (4334).

8. The traction device for a cable-forming machine according to claim 3, characterized in that, The semi-cylindrical shell (111) is provided with an air inlet (118), one end of which is connected to the outer wall; A quick-connect valve (119) is located at one end of the air inlet (118) near the outer wall of the semi-cylindrical housing (111); The inflation hole (118) is connected to each of the elastic airbags (120), and each of the elastic airbags (120) is provided with an electromagnetic valve between the inflation hole (118).

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