Covering net hook welding machine

Abstract

The invention belongs to net covering hook welding equipment, and particularly relates to a net covering hook welding machine. Comprising a rack, a feeding device and a welding device. The machine frame comprises a main machine frame and a movable frame, and the distance between the main machine frame and the movable frame is adjustable. The problem that existing equipment cannot bend exposed ends of welding steel wires of a main reinforcement net, an auxiliary reinforcement net and a net piece to achieve mechanical operation is effectively solved. The device has the advantages of being reasonable in structural design, capable of achieving standardized operation of welding wires and rapid bending, stable and reliable in operation, suitable for welding of main reinforcement nets, auxiliary reinforcement nets and net pieces of different thicknesses and standardized rapid operation of bending of exposed steel wires and the like.

Description

Technical Field

[0001] The invention belongs to a welding device for covering net hooks, in particular to a covering net hook welding machine. Background Art

[0002] The main structure of a laminated steel mesh composite thermal insulation exterior wall panel is that main reinforcement meshes are arranged on both sides of a graphite polystyrene board, and auxiliary reinforcement meshes are arranged at intervals outside the main reinforcement meshes to form a grid. Both ends of steel wires pass through the graphite polystyrene board and are respectively welded to the main reinforcement mesh and the auxiliary reinforcement mesh. A steel wire mesh is attached to the surface of the auxiliary reinforcement mesh. The difference between a laminated steel mesh composite thermal insulation interior wall panel and a laminated steel mesh composite thermal insulation exterior wall panel is only that it does not include a graphite polystyrene board. Because of the action of concrete during use, it is easy for the steel wires to become unsoldered from the main reinforcement mesh and the auxiliary reinforcement mesh. Therefore, bending the outer ends of the steel wires exposed on the surface of the auxiliary reinforcement mesh is an essential structure of existing products. Even if the steel wires become unsoldered from the main reinforcement mesh and the auxiliary reinforcement mesh, the above structure can still maintain the stability of the product structure. Currently, there is no dedicated equipment to complete the above bending operation, and the bending operation is mainly completed manually using simple non-standard tools. The problems existing in the above operation are: first, the standardization degree and work efficiency of manual operation are low; second, it is easy to damage the mesh frame using tools; third, the labor cost is high; fourth, because the bending is not in place, the products will be hooked to each other during stacking and conveying, resulting in inconvenience. If equipment is used to complete the automatic production of laminated steel mesh composite thermal insulation wall panels, bending the exposed ends of the welded steel wires is an essential process and technical key to complete the above operations. Through research by the applicant, it is found that although the exposed ends of the steel wires can be bent through a single bending operation, it is difficult to bend them in place and clamp the auxiliary reinforcement mesh. Therefore, a secondary action is required to further bend the steel wires in place and clamp the auxiliary reinforcement mesh to achieve the purpose of bending the steel wires.

[0003] The existing patent documents retrieved by the applicant are as follows:

[0004] The patent document with the publication number CN213564459U discloses a vertical steel wire mesh thermal insulation board forming machine. The insertion and welding of steel wires and the mesh are realized through an insertion wire device and a welding device, and the welding device adopts the prior art. The exposed ends of the welded steel wires cannot be bent by the equipment. Therefore, once the steel wires become unsoldered from the main reinforcement mesh and the auxiliary reinforcement mesh, the steel wires will fall off. The applicant has not found any literature reports in the domestic patent database that are the same as or similar to the present utility model. Summary of the Invention

[0005] The purpose of the present invention is to provide a covering net hook welding machine, which can effectively bend the exposed bent ends of the steel wires welded on the main reinforcement meshes and auxiliary reinforcement meshes with different thickness specifications, so as to effectively ensure that the exposed ends of the steel wires that have undergone a single bending operation but are not bent enough are bent in place and tightly hold the outer auxiliary reinforcement mesh, so as to avoid the risk of the steel wires falling off once they become unsoldered from the main reinforcement mesh and the auxiliary reinforcement mesh.

[0006] The overall technical concept of the present invention is as follows:

[0007] A net-covered hook welding machine includes a frame, a feeding device located at the material input end of the frame, and a welding device adapted to the welding stations of the steel wires exposed on the main reinforcement net and the secondary reinforcement net on the material channel; the frame includes a main frame and a movable frame provided on the main frame, and the movable frame and the main frame are reciprocally matched along a direction perpendicular to the material channel through a width-adjusting device. It further includes:

[0008] A. A primary bending device, in which the second support frames are symmetrically arranged on the movable frame and the main frame on both sides of the material channel behind the welding station. The shaft rod is driven by a primary bending cylinder provided on the second support frame to reciprocate longitudinally. Second fixing plates are longitudinally and spacedly arranged on the second support frames adjacent to the material channel. On one side of the shaft rod adjacent to the material channel, movable blocks are longitudinally and spacedly fixed. The movable blocks are provided with working surfaces for bending the exposed ends of the steel wires through relative movement with the second fixing plates.

[0009] B. A secondary bending device, in which the columns are symmetrically arranged and slidably assembled on the movable frame and the main frame on both sides of the material channel behind the primary bending station. The columns reciprocate in a direction perpendicular to the material channel under the drive of a linear drive source. On the inner sides of the columns facing the conveying channel, pressing plates that can act on the exposed bent parts of the steel wires formed at the primary bending station are longitudinally and spacedly arranged.

[0010] The applicant needs to explain that the distance between the movable frame and the main frame is adjustable, which not only enables the material channel for accommodating the main reinforcement net to adapt to the conveying of main reinforcement nets of different widths, but also meets the precise technical requirements of subsequent welding wire and bending operations at the stations, realizing the standardized and continuous production of welding and bending of steel wires with the secondary reinforcement net and the mesh under accurate positioning. The primary bending operation is gradually promoted by the up-and-down misaligned movement of the fixed blocks on the shaft rod driven by the primary bending cylinder and the movable plates on the second support frames. The structural design of the working surface is to improve the stress of the steel wires and provide a bending support for the steel wires, avoiding excessive shear force on the steel wires resulting in damage or deviation of the bending parts from the set positions.

[0011] The secondary bending operation is to drive the pressing plates on the columns to push the exposed ends of the steel wires that have been bent for the first time but not in place to bend. Under the action of the pressing plates, they are bent in place and hold the secondary reinforcement net on the outer side of the wire mesh, avoiding the falling off of the steel wires once they are de-welded from the main and secondary reinforcement nets. The linear drive source can be selected from one or a combination of a cylinder, a linear motor, or a transmission mechanism driven by a rotating motor that can convert rotation into linear motion, all of which do not deviate from the essence of the present invention.

[0012] The specific technical solutions of the present invention also include:

[0013] To facilitate flexible movement when adjusting the spacing between the movable frame and the main frame, the preferred technical implementation means is that the bottom of the movable frame is in rolling cooperation with the first guide rail on the main frame through guide wheels along the direction perpendicular to the material channel.

[0014] The bending operation of the exposed end of the steel wire is realized through the up-and-down misaligned movement between the movable block and the fixed plate. However, if the working surfaces of both are flat planes, the bending part is not easily determined or the steel wire is easily broken due to excessive shear force on the steel wire during misalignment, which is not conducive to effectively ensuring the bending quality. If the bending part is offset and cannot be effectively guaranteed, it will damage the main reinforcement mesh, auxiliary reinforcement mesh or be meaningless in practice. The preferred technical implementation means is that the working surface is a slope surface. In this way, the force on the steel wire gradually increases during the up-and-down misalignment between the movable block and the fixed plate, and the bending angle gradually increases until it reaches the set position and is bent in place at one time, improving the accuracy and quality of one-time bending.

[0015] To facilitate the installation of the shaft rod and the first bending cylinder and at the same time ensure the structural stability under the working state, the preferred technical implementation means is that the second support frame includes vertical plates arranged on both sides of the shaft rod, a bottom plate fixed to the bottom of the vertical plates and used for connecting with the main frame or the movable frame, and the first bending cylinder is fixed to the top of the second support frame through a connecting frame and its power output end is connected to the upper end of the shaft rod.

[0016] Furthermore, to effectively ensure the accurate direction of the longitudinal movement of the shaft rod and thus improve the operation accuracy of the first bending operation, the preferred technical implementation means is that the bottom of the shaft rod is in sliding fit with the bushing arranged on the second support frame.

[0017] To achieve flexible cooperation between the column, the movable frame and the main frame, and at the same time achieve synchronous up-and-down movement of the column, meet the synchronism of the action of multiple pressing plates on the exposed end of the steel wire on the column, facilitate ensuring the product quality and effectively realizing standardized production, the preferred technical implementation means is that the upper and lower ends of the column are respectively in sliding assembly with the third guide rails arranged on the movable frame and the main frame through upper sliding sleeves and lower sliding sleeves.

[0018] To facilitate the installation of the third guide rail, the preferred technical implementation means is that the third guide rail is respectively connected to the movable frame or the main frame through an upper fixing seat and a lower fixing seat.

[0019] To facilitate the position adjustment of the pressing plate on the column to meet the processing requirements of main reinforcement meshes with different thicknesses or the adjustment requirements of different bending degrees of the exposed end of the steel wire, the preferred technical implementation means is that the pressing plate is connected to the column through a spacing adjustment mechanism. A more preferred technical implementation means is that the spacing adjustment mechanism is a lead screw and nut mechanism or a parallelogram mechanism.

[0020] To facilitate the installation of the spacing adjustment mechanism, a more preferred technical implementation method is that the spacing adjustment mechanism uses a screw nut mechanism, and the spacing adjustment mechanism consists of a second screw and a second nut assembled in the middle and fixed to the column.

[0021] The main function of the width adjustment device is to adjust the distance between the movable frame and the main frame. In order to achieve consistent adjustment of the distance between the movable frame and the main frame, not only the material channel can adapt to the transportation of main reinforcement meshes of different widths, but also meet the precise technical requirements of the workstation during subsequent welding and bending operations, and realize the continuous production of traction, welding and bending of the secondary reinforcement mesh and the mesh with the main reinforcement mesh under accurate positioning. The preferred technical implementation means is that the width adjustment device adopts a screw feeding mechanism, including at least three first nuts fixed on the movable frame, each first nut forming a plane parallel to the material channel 1D direction, and the outer end of the first screw is arranged on the main frame and driven by a driving wheel.

[0022] Furthermore, the driving wheel is a hand wheel, or a hand wheel and a sprocket chain transmission pair, or a combination thereof.

[0023] The driving wheel can be driven alone or synchronously, which does not deviate from the essence of the present invention. In order to simplify the structure and realize the synchronous adjustment of the distance between the movable frame and the main frame, and ensure the accuracy of the adjustment, the preferred technical implementation means is that the driving wheel adopts a handwheel and a sprocket chain transmission pair, and the sprocket chain transmission pair includes a sprocket and a chain connected between the sprockets, and a handwheel is coaxially driven on one of the sprockets. In this way, by rotating the handwheel, the synchronous rotation of each sprocket can be realized through the chain, and then the synchronous feeding of the first screw can be realized through the screw feeding mechanism, and the synchronous and precise adjustment of the distance between the main frame and the movable frame is completed.

[0024] Furthermore, there are four groups of lead screw feeding mechanisms, which are symmetrically arranged between the movable frame and the main frame.

[0025] To facilitate the transportation of materials, the preferred technical implementation means is to also include a traction device for material transportation, the traction device including front columns and rear columns distributed on both sides of the front and rear ends of the material channel, the relatively arranged front columns and rear columns are connected by a connecting frame and a movable frame to achieve sliding cooperation with synchronously adjustable spacing, the connecting frame is rollingly matched with the main frame through rollers, the traction cylinder drives the front columns and the rear columns to synchronously reciprocate along the direction of the material channel through a crank-connecting rod mechanism and a linkage rod, the stroke of the crank-connecting rod mechanism is an integer multiple of the length of the cell of the main reinforcement network or the auxiliary reinforcement network, and a traction hook with a self-resetting function is installed on the inner side of the front column, the inner side of the rear column and the fixed rod arranged at intervals on the outer side of the front column, the self-resetting direction is toward the direction of the material channel 1D channel, and the bending direction of the traction hook is toward the discharge direction and is adapted to the main reinforcement network or the auxiliary reinforcement network.

[0026] The applicant needs to explain that the main reason for the different positions of the towing hooks on the front uprights and rear uprights is that when feeding, the steel wires are not yet welded to the secondary rib nets as a whole. The main rib net and the secondary rib net can be connected by a simple-structured connecting piece. Once entering the towing station, the subsequent towing operation can be completed through a step-by-step towing operation. Therefore, there are two layers of towing hooks on the inner and outer sides of the front uprights on both sides of the front end of the material channel, mainly to ensure synchronous towing of the main rib net and the secondary rib net arranged at intervals therewith, and at the same time reduce the towing load. The main reason for setting a single layer of towing hooks on the rear uprights is that the steel wires have welded the main rib net and the secondary rib net as a whole and completed the bending operation of the exposed steel wires. Therefore, the towing operation can be achieved by hooking the secondary rib net on the outer side of the net rack. The main reason for the structural design that the stroke of the crank connecting rod mechanism is an integer multiple of the length of the cell of the main rib net or the secondary rib net is to facilitate subsequent operations such as welding wire and bending.

[0027] The sliding fit with the same-spacing adjustable between the relatively arranged front uprights is realized through a connecting frame and a movable frame. Its main purpose is to enable the towing hooks to perform towing operations on net racks of different thickness specifications on the basis of effectively accommodating net racks of different thicknesses between the front uprights. The preferred technical implementation means is that the front uprights include front outer uprights and front inner uprights located on both sides of the front end of the material channel. The front inner uprights are arranged on the movable frame and reciprocally cooperate with it along the direction of the material channel. The front outer uprights and the front inner uprights are slidably assembled perpendicular to the direction of the material channel through the guide rods on the connecting frame.

[0028] The main function of the towing cylinder to drive the front uprights and the rear uprights to reciprocate synchronously along the material conveying direction through the crank connecting rod mechanism and the linkage rod is to provide power for subsequent operations such as welding wire and bending. To facilitate the flexible cooperation between the front uprights and the movable frame and enable the front inner uprights to flexibly reciprocate under the action of the crank connecting rod, the preferred technical implementation means is that the front inner uprights are reciprocally cooperated with the movable frame along the direction of the material channel through the sliding sleeves and the guide rods arranged on the movable frame.

[0029] To facilitate improving the synchronization of the up-and-down movements of the front outer uprights and the front inner uprights, which is beneficial to the synchronous towing of the net rack by the towing hooks, thereby meeting the same frequency and amplitude of the net rack conveying, and at the same time facilitating the synchronous and effective transmission of the rear uprights, the preferred technical implementation means is that the lower ends of the front outer uprights and the front inner uprights are respectively connected to the power output ends of the relatively arranged first crank connecting rod mechanisms, the power output of the towing cylinder is connected to the power input end of the first crank connecting rod mechanism, the upper ends of the front outer uprights and the front inner uprights are respectively connected to the power output ends of the relatively arranged second crank connecting rod mechanisms, and the first crank connecting rod mechanism and the second crank connecting rod mechanism are linked through the first connecting rod.

[0030] To ensure the synchronization of the actions of the crank connecting rod mechanism, the preferred technical implementation means is that the relatively arranged second crank connecting rod mechanisms are linked through the second connecting rod.

[0031] To enable the towing hook on the rear column to perform towing operations on wire meshes of different thicknesses and improve the flexibility of the actions between adjacent components, the preferred technical implementation means is that the rear column includes rear outer columns and rear inner columns located on both sides at the front end of the material passage. The rear inner columns are arranged on the movable frame and reciprocally cooperate with it along the material conveying direction. The rear outer columns and the rear inner columns are slidably assembled perpendicular to the direction of the material passage through the guide rods on the connecting frame. The rear inner columns are reciprocally cooperated with the movable frame along the direction of the material passage through the sliding sleeves and the guide rods on the movable frame.

[0032] To facilitate the assembly of the towing hook with the front column and the rear column and effectively meet the realization of the self-resetting function of the towing hook, the preferred technical implementation means is that first fixing plates are assembled on the inner sides of the front column and the rear column. The end of the towing hook is rotatably assembled with the first fixing plate, and a reset spring is provided at the adjacent position between the middle part of the towing hook and the first fixing plate.

[0033] The main function of the linkage rod is to ensure the synchronization of the actions of the front column and the rear column on the basis of ensuring the effective transmission of power. The preferred technical implementation method is that the linkage rod adopts a third connecting rod assembled between the connecting frames at the adjacent positions of the front outer column, the front inner column, the rear outer column, and the rear inner column.

[0034] To meet the effective cooperation between the towing hook and the main reinforcement mesh and the auxiliary reinforcement mesh, the preferred technical implementation means is that the towing hooks on the inner sides of the front column and the rear column are adapted to the main reinforcement mesh; the towing hooks assembled on the fixing rods spaced on the outer side of the front column are adapted to the auxiliary reinforcement mesh.

[0035] The welding device can be realized in various ways. The more preferred implementation method is that the welding device mainly adopts an opening and closing welding torch controlled by a power source through a mechanical transmission structure. The welding device includes first support frames respectively fixed on the main frame and the movable frame, a welding torch arranged on the first support frame and adapted to the welding station of the exposed ends of the steel wires on the main reinforcement mesh and the auxiliary reinforcement mesh, a welding cylinder arranged on the first support frame controls the opening and closing of the working head of the welding torch through a third crank connecting rod mechanism, and a cylinder and a pressing plate for attaching the auxiliary reinforcement mesh and the mesh piece to the surface of the main reinforcement mesh are provided at the feeding end of the welding device.

[0036] For the convenience of realizing feeding, a preferred technical implementation means is that there is also a feeding device, including a material channel arranged outside the feeding end of the main frame and along the direction of the material channel. Feeding frames are spaced apart on both the left and right sides of the material channel and form an angle not greater than 90° with it. Components for positioning the secondary reinforcement mesh and the mesh sheet are arranged on the feeding frames. An angle adjustment mechanism is provided between the feeding frames on the inner and outer sides of the material channel for adjusting the angle. Isolation fences are arranged on the main frame and the movable frame on both the left and right sides of the material channel, and the thickness of the isolation fence is adapted to the set spacing between the main reinforcement mesh and the secondary reinforcement mesh.

[0037] The applicant needs to explain that the role of the main reinforcement mesh is to serve as the weighing and stress-bearing skeleton of the laminated steel mesh composite thermal insulation exterior wall panel, playing a role similar to that of steel bars. The role of the secondary reinforcement mesh and the mesh sheet is to act as a formwork to block concrete. The specification design of the main reinforcement mesh mainly refers to the reinforcement ratio, the bond strength to concrete, the compactness of pouring, and affordability. The design of the secondary reinforcement mesh and the mesh sheet mainly considers technical factors such as stiffness, economy, and preventing large-area slurry flow due to concrete slurry seepage.

[0038] The main role of the angle adjustment mechanism is to facilitate the corresponding adjustment of the feeding angle of the secondary reinforcement mesh and the mesh sheet when the material table adapts to different specifications of the main reinforcement mesh thickness, and at the same time meet the accommodation of different thicknesses of the main reinforcement mesh, so as to achieve smooth feeding of the main reinforcement mesh and the secondary reinforcement mesh, and facilitate subsequent operations to attach the secondary reinforcement mesh and the mesh sheet to the surface of the isolation fence. A preferred technical implementation means is that the angle adjustment mechanism includes a cross bar connected between the relatively arranged feeding frames. One end of the cross bar is fixed to the feeding frame on one side of the material channel, and a sleeve is provided at the other end of the cross bar. A long circular hole is opened at the top end of the feeding frame adjacent to the other end of the cross bar, and a setscrew passes through and connects the sleeve and the long circular hole.

[0039] The main role of the component for positioning the mesh sheet and the secondary reinforcement mesh is to facilitate the smooth feeding of the secondary reinforcement mesh and prevent it from tipping over easily. A preferred technical implementation means is that the component for positioning the secondary reinforcement mesh and the mesh sheet includes a card slot arranged at the bottom end of the feeding frame and capable of accommodating the secondary reinforcement mesh and the mesh sheet, and a clamping plate distributed on the outer side of the top end of the feeding frame and capable of preventing the secondary reinforcement mesh and the mesh sheet from tipping over.

[0040] For the convenience of smooth feeding of the main reinforcement mesh, a preferred technical implementation means is that the spacing between the relatively arranged isolation fences is adapted to the main reinforcement mesh, and the feeding ends of the relatively arranged isolation fences are in an eight-shaped expansion towards the feeding direction.

[0041] To ensure the structural strength of the isolation fence, and at the same time facilitate the limitation of the spacing between the main reinforcement mesh and the secondary reinforcement mesh and the mesh sheet, so as to subsequently press the secondary reinforcement mesh and the mesh sheet against the surface of the main reinforcement mesh through a cylinder and a pressing plate, and then realize the welding operation. A preferred technical implementation means is that the isolation fence is a fence structure made of metal pipes, and the set spacing between the main reinforcement mesh and the secondary reinforcement mesh corresponds to the outer diameter of the metal pipe.

[0042] The main purpose of the isolation grid with adjustable spacing is to facilitate the processing of wire meshes with different thickness specifications to meet actual needs. Considering the supporting applications with devices such as traction, wire feeding, and bending, the preferred technical implementation means is that a movable frame reciprocates along a direction perpendicular to the material channel on the main frame, and the isolation grid on one side and the discharge end of the corresponding feeding frame are arranged on the movable frame.

[0043] The substantial features and remarkable technical progress of the present invention lie in:

[0044] 1. In the present invention, the spacing between the main frame and the movable frame of the width adjustment device is adjustable. Firstly, it can conveniently realize the processing of main wire meshes with different thicknesses, expanding the processing range of products. Secondly, it provides a reliable structural support for subsequent traction, wire feeding, and bending operations, ensuring the accurate adjustment of workstations during wire feeding and bending operations. Thirdly, the structural design of the first guide rail and the guide wheel improves the flexibility of the cooperation of components, facilitating the reduction of load and the lowering of working intensity during spacing adjustment. Fourthly, the linkage adjustment realized by the sprocket chain transmission pair can quickly achieve the synchronism and accuracy of spacing adjustment.

[0045] 2. In the present invention, the structural design of the primary bending device: Firstly, the bending operation of the exposed end of the steel wire is realized by the vertical dislocation of the fixed block and the movable plate, and the positioning and bending operation of the exposed end of the steel wire is easy to achieve standardized and rapid operation. Secondly, the structural design with a slope surface on the working surface is adopted. When the movable block and the fixed plate are vertically dislocated, the force on the steel wire gradually increases, and the bending angle gradually increases until it bends in place at the set position, ensuring the bending accuracy and quality. Thirdly, the structural design of the bushing and the shaft rod effectively ensures the accurate direction of the longitudinal movement of the shaft rod, and thus provides a reliable structural guarantee for the accurate positioning of the bending operation.

[0046] 3. In the present invention, the structural design of the secondary bending device: Firstly, the column serving as the structural support is stable in structure and flexible in movement, providing a stable structural guarantee for the accuracy of the pressing plate's action. Secondly, the pressing plate is used to realize the bending operation of the exposed end of the steel wire that has been bent on the outer side of the secondary wire mesh. At the same time, through the spacing adjustment mechanism, the assembly with the column is realized, and a good interaction can be formed for the exposed end of the steel wire that already has a curvature but is not bent in place, and the bending effect is good. Thirdly, the pressing plate has a simple structure, high strength, and can maintain no deformation during long-term operation, which is conducive to realizing the standardized production of products and the finished product rate. Fourthly, it is adjusted through the spacing adjustment mechanism to meet the needs of different curvatures, and at the same time, it can make up for the defect of unequal spacing between each pressing plate and the main wire mesh caused by the deformation of the column, the main wire mesh, and the frame, reducing the maintenance rate of the equipment.

[0047] 4. The structural design of the feeding device in the present invention is, firstly, to facilitate the smooth feeding of the main reinforcement net and the auxiliary reinforcement net, which is beneficial to the connection with the subsequent main and auxiliary reinforcement nets and mesh fitting, welding wire and bending operations; secondly, the discharge ends of the isolation fence and the feeding rack are respectively arranged on the main frame and the movable frame, which can not only effectively realize the adjustable spacing of the isolation fence, but also be convenient to match with the traction, welding wire and bending devices, providing local structural support for the design of the whole machine; thirdly, the thickness of the isolation fence is adapted to the set spacing of the main and auxiliary reinforcement nets, which is convenient to meet the structural strength of the isolation fence, and provides a reliable structural guarantee for the fitting of the main and auxiliary reinforcement nets and mesh; it can also effectively meet the rapid determination of the spacing before the main and auxiliary reinforcement nets and mesh operations, laying the foundation for the subsequent welding wire operations; fourthly, it provides stable structural support for the smooth transportation of the main and auxiliary reinforcement nets and meshes, which is conducive to convenient operation.

[0048] 5. The structural design of the traction device in the present invention is that, first, it can realize the one-way traction of the main and auxiliary reinforcement nets and smooth material transportation; second, it adopts mechanical components as the main structure of the action execution mechanism, and the reliability of parts assembly is good, the structure is stable and the failure rate is low; third, the traction hook is easy to cooperate with the main and auxiliary reinforcement nets, which improves the reliability of the traction action and is easy to realize automatic control; fourth, it is easy to realize the arrangement of the traction hook and meet the load requirements at the same time; fifth, it is easy to cooperate with the main frame and the movable frame to facilitate the requirements of action transmission; sixth, the front and rear columns are matched with the crank connecting rod mechanism and the linkage rod structure design, which is convenient The first is to achieve synchronous action to reduce the conveying load of the traction hook; the second is that the front column adopts inner and outer columns, and the structural design of the double-layer traction hook can be used to carry out targeted structural design according to the raw material conditions to ensure the synchronous pulling of the main reinforcement network and the auxiliary reinforcement network; and it can effectively reduce the load of the traction hook, while reducing the possibility of damage to the main and auxiliary reinforcement networks due to excessive tension; the eighth is the use of cylinder drive and auxiliary crank connecting rod stroke structural design, which simplifies the drive and transmission mechanism while ensuring the reliability of the drive, and has a more precise transmission ratio to ensure the accuracy of the transmission, providing structural guarantee for traction, welding wire, bending and other operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The accompanying drawings of the present invention include:

[0050] Figure 1 It is a schematic diagram of the overall structure of the mesh covering hook welding machine of the present invention.

[0051] Figure 2 yes Figure 1 Top view of the .

[0052] Figure 3 yes Figure 1 Right view of .

[0053] Figure 4 yes Figure 1 Stereoscopic diagram.

[0054] Figure 5 It is a perspective view of the feeding device in the present invention.

[0055] Figure 5a It is a top view schematic diagram of the feeding state after the feeding device is connected to the main frame.

[0056] Figure 5b It is a perspective view schematic diagram of the feeding state after the feeding device is connected to the main frame.

[0057] Figure 5c It is Figure 5b The partial enlarged view of part I in

[0058] Figure 6 It is a schematic diagram of the overall structure of the width adjustment device in the present invention.

[0059] Figure 6a It is Figure 6 The view in the direction of C-C of

[0060] Figure 6b It is a perspective view schematic diagram of the width adjustment device applied to the net covering hook machine.

[0061] Figure 7 It is a schematic diagram of the structure of the traction device.

[0062] Figure 7a It is Figure 7 The top view of

[0063] Figure 7b It is a perspective view of the traction device.

[0064] Figure 7c It is a schematic diagram of the connection between the traction device and the frame.

[0065] Figure 7d It is Figure 7c The top view of

[0066] Figure 7e It is a perspective view of the connection between the traction device and the frame.

[0067] Figure 7f It is Figure 7c The partial enlarged view of part II in

[0068] Figure 7g It is Figure 7d The partial enlarged view of part III of in the non-working state.

[0069] Figure 7h It is Figure 7d The partial enlarged view of part III of in the working state.

[0070] Figure 8 It is a schematic diagram of the structure of the welding device.

[0071] Figure 8a is Figure 8 the D-D direction view of

[0072] Figure 8b is Figure 8 the perspective view of

[0073] Figure 9 the structural schematic diagram of the primary bending device

[0074] Figure 9a is Figure 9 the right view of

[0075] Figure 9b is Figure 9 the E-E direction view of

[0076] Figure 9c is Figure 9 the perspective view of

[0077] Figure 9d the schematic diagram of the working state when the primary bending device is applied to the net-covered hook machine

[0078] Figure 10 the structural schematic diagram of the secondary bending device

[0079] Figure 10a is Figure 10 the bottom view of

[0080] Figure 10b is Figure 10 the three-dimensional structural schematic diagram of

[0081] Figure 10c the schematic diagram of the working state when the secondary bending device is applied to the net-covered hook machine

[0082] The reference numerals in the drawings are as follows:

[0083] 1. Feeding device; 1A. Feeding rack; 1B. Card slot; 1C. Card board; 1D. Material channel; 1E. Angle adjustment mechanism; 1E1. Setscrew; 1E2. Sleeve; 1E3. Long oval hole; 1F. Main reinforcement mesh; 1G. Secondary reinforcement mesh; 1J. Isolation grid; 2. Width adjustment device; 2A. Main frame; 2B. Movable frame; 2C. Sprocket; 2D. Chain; 2E. Handwheel; 2F. First lead screw; 2G. First nut; 2H. First guide rail; 2J. Guide wheel; 3. Traction device; 3A. Traction cylinder; 3F. Sliding sleeve; 3G. Guide rod; 3H. Front column; 3H1. Front outer column; 3H2. Front inner column; 3J. Rear column; 3J1. Rear outer column; 3J2. Rear inner column; 3K. First fixing plate; 3L. Return spring; 3M. Traction hook; 3N. First crank and connecting rod mechanism; 3P. Second crank and connecting rod mechanism; 3Q. First connecting rod; 3R. Second connecting rod; 3S. Third connecting rod; 3T. Connecting frame; 3U. Fixed rod; 3V. Second guide rail; 3W. Roller; 3B. Steel wire; 4. Welding device; 4A. Welding cylinder; 4B. Third crank and connecting rod mechanism; 4C. Welding torch; 4D. First support frame; 5. First bending device; 5A. First bending cylinder; 5B. Shaft rod; 5C. Second support frame; 5D. Bush; 5E. Second fixing plate; 5F. Movable block; 6. Second bending device; 6A. Third guide rail; 6B. Upper sliding sleeve; 6C. Lower sliding sleeve; 6D. Upper fixing seat; 6E. Lower fixing seat; 6F. Column; 6G. Second nut; 6H. Second lead screw; 6J. Pressure plate; 6K. Second bending cylinder. Detailed implementation mode

[0084] The embodiments of the present invention are further described below in conjunction with the accompanying drawings, but are not intended to limit the present invention. The protection scope of the present invention is subject to the content recorded in the claims. Any equivalent technical means substitution based on the description in the specification does not depart from the protection scope of the present invention. Terms such as "both sides", "longitudinal", "inner side", "upper end", "lower end", etc. in the present invention are descriptions based on the orientation in the drawings and cannot be understood as limitations on the present invention. Terms "first", "second", "third" are only used for description and cannot be understood as implying importance.

[0085] The overall structure of this embodiment is as shown in the figure. The net-covered hook welding machine includes a frame, a feeding device 1 located at the material input end of the frame, and a welding device 4 adapted to the welding station of the steel wire 3B exposed on the main reinforcement mesh 1F and the secondary reinforcement mesh on the material channel 1D; the frame includes a main frame 2A and a movable frame 2B arranged thereon. The movable frame 2B and the main frame 2A reciprocally cooperate along a direction perpendicular to the material channel 1D through a width adjustment device 2, and further includes:

[0086] A. Primary bending device 5, wherein the second support frame 5C is symmetrically arranged on the movable frame 2B and the main frame 2A on both sides of the material channel 1D behind the welding station. The shaft rod 5B is driven by a primary bending cylinder 5A arranged on the second support frame 5C to reciprocate longitudinally. On the second support frame 5C adjacent to the material channel 1D, second fixed plates 5E are arranged at intervals longitudinally. On one side of the shaft rod 5B adjacent to the material channel 1D, movable blocks 5F are fixed at intervals longitudinally. The movable blocks 5F are provided with working surfaces for bending the exposed end of the steel wire 3B by relative movement with the second fixed plates 5E, and the working surfaces are inclined planes.

[0087] B. Secondary bending device 6, wherein the columns 6F are symmetrically arranged and slidably assembled on the movable frame 2B and the main frame 2A on both sides of the material channel 1D behind the primary bending station. The columns 6F reciprocate in a direction perpendicular to the material channel 1D under the drive of a linear drive source. On the inner side of the columns 6F facing the material channel 1D, pressing plates 6J are arranged at intervals longitudinally and can act on the exposed bent part of the steel wire 3B formed at the primary bending station.

[0088] The bottom of the movable frame 2B is in rolling fit with the first guide rail 2H on the main frame 2A through guide wheels 2J in a direction perpendicular to the material channel 1D.

[0089] The second support frame 5C includes vertical plates arranged on both sides of the shaft rod 5B, a bottom plate fixed to the bottom of the vertical plates and used for connecting with the main frame 2A or the movable frame 2B. The primary bending cylinder 5A is fixed to the top of the second support frame 5C through a connecting frame, and its power output end is connected to the upper end of the shaft rod 5B. The bottom of the shaft rod 5B is in sliding fit with a bushing 5D arranged on the second support frame 5C.

[0090] The upper and lower ends of the columns 6F are respectively in sliding fit with the third guide rails 6A arranged on the movable frame 2B and the main frame 2A through upper sliding sleeves 6B and lower sliding sleeves 6C. The third guide rails 6A are respectively connected with the movable frame 2B or the main frame 2A through upper fixing seats 6D and lower fixing seats 6E.

[0091] The pressing plates 6J are connected with the columns 6F through a spacing adjustment mechanism. The spacing adjustment mechanism selects a lead screw and nut mechanism, including a second lead screw 6H and a second nut 6G assembled in the middle thereof and fixed to the columns 6F.

[0092] The width adjustment device adopts four sets of lead screw feeding mechanisms, which are symmetrically arranged up and down between the movable frame 2B and the main frame 2A. It includes four first nuts 2G fixed on the movable frame 2B. Each first nut 2G forms a plane parallel to the direction of the material channel 1D. The outer end of the first lead screw 2F is arranged on the main frame 2A and is driven by a driving wheel. The driving wheel adopts a handwheel and a sprocket chain transmission pair. The sprocket chain transmission pair includes a sprocket 2C and a chain 2D connected between the sprockets 2C. A handwheel 2E is coaxially and drivingly matched with one of the sprockets 2C.

[0093] It also includes a traction device 3 for material transportation. The traction device 3 includes front columns 3H and rear columns 3J distributed on both sides of the front and rear ends of the material channel 1D. The distance between the relatively arranged front columns 3H and the distance between the rear columns 3J are synchronously adjustable through a connecting frame 3T and the movable frame 2B. The connecting frame 3T is in rolling fit with the main frame 2A through rollers 3W. The traction cylinder 3A drives the front columns 3H and the rear columns 3J to reciprocate synchronously along the material transportation direction through a crank - connecting rod mechanism and a linkage rod. The stroke of the crank - connecting rod mechanism is an integer multiple of the length of the grid cell of the main reinforcement mesh 1F or the secondary reinforcement mesh 1G. Self - resetting traction hooks 3M are assembled on the inner sides of the front columns 3H, the inner sides of the rear columns 3J, and the fixed rods 3U spaced on the outer sides of the front columns 3H. The self - resetting direction is towards the direction of the material channel 1D. The bending direction of the traction hook 3M is towards the discharging direction and is adapted to the main reinforcement mesh 1F or the secondary reinforcement mesh 1G.

[0094] The front column 3H includes front outer columns 3H1 and front inner columns 3H2 located on both sides of the front end of the material channel 1D. The front inner columns 3H2 are arranged on the movable frame 2B and reciprocate with it along the direction of the material channel 1D. The front outer columns 3H1 and the front inner columns 3H2 are in sliding fit perpendicular to the material transportation direction through guide rods on the connecting frame 3T.

[0095] The front inner columns 3H2 are in reciprocating fit with the movable frame 2B along the material transportation direction through a sliding sleeve 3F and a guide rod 3G arranged on the movable frame 2B.

[0096] The lower ends of the front outer columns 3H1 and the front inner columns 3H2 are respectively connected to the power output ends of the relatively arranged first crank - connecting rod mechanisms 3N. The power output of the traction cylinder 3A is connected to the power input end of the first crank - connecting rod mechanism 3N. The upper ends of the front outer columns 3H1 and the front inner columns 3H2 are respectively connected to the power output ends of the relatively arranged second crank - connecting rod mechanisms 3P. The first crank - connecting rod mechanism 3N and the second crank - connecting rod mechanism 3P are linked through a first connecting rod 3Q.

[0097] The relatively arranged second crank - connecting rod mechanisms 3P are linked through a second connecting rod 3R.

[0098] The rear upright column 3J includes a rear outer upright column 3J1 and a rear inner upright column 3J2 located on both sides of the front end of the material channel 1D. The rear inner upright column 3J2 is arranged on the movable frame 2B and reciprocally cooperates with it along the direction of the material channel 1D. The rear outer upright column 3J1 and the rear inner upright column 3J2 are slidably assembled perpendicular to the direction of the material channel 1D through the guide rods on the connecting frame 3T. The rear inner upright column 3J2 reciprocally cooperates with the movable frame 2B along the direction of the material channel 1D through the sliding sleeve 3F and the guide rod 3G on the movable frame 2B.

[0099] A first fixing plate 3K is assembled inside the front upright column 3H and inside the rear upright column 3J. The end of the towing hook 3M is rotatably assembled with the first fixing plate 3K, and a return spring 3L is provided at the adjacent position between the middle part of the towing hook 3M and the first fixing plate 3K.

[0100] The linkage rod adopts a third connecting rod 3S assembled between the connecting frames 3T at the adjacent positions of the front outer upright column 3H1 and the front inner upright column 3H2 and the connecting frames 3T at the adjacent positions of the rear outer upright column 3J1 and the rear inner upright column 3J2.

[0101] The towing hooks 3M inside the front upright column 3H and inside the rear upright column 3J are adapted to the main reinforcement mesh 1F; the towing hooks 3M assembled on the fixing rods 3U spaced on the outside of the front upright column 3H are adapted to the secondary reinforcement mesh 1G.

[0102] The welding device 4 includes a first support frame 4D fixed to the main frame 2A and the movable frame 2B, a welding torch 4C arranged on the first support frame 4D and adapted to the welding station of the exposed ends of the steel wires 3B on the main reinforcement mesh 1F and the secondary reinforcement mesh 1G. The welding cylinder 4A arranged on the first support frame 4D controls the opening and closing of the working head of the welding torch 4D through a third crank connecting rod mechanism 4B. The feeding end of the welding device 4 is provided with a cylinder and a pressing plate for attaching the secondary reinforcement mesh 1G and the mesh sheet to the surface of the main reinforcement mesh 1F.

[0103] There is also a feeding device 1, including a material channel 1D arranged outside the feeding end of the main frame 2A and along the material conveying direction. The feeding frames 1A are spaced on both sides of the material channel 1D and form an angle not greater than 90° with it. The feeding frames 1A are provided with components for positioning the secondary reinforcement mesh 1G and the mesh sheet. An angle adjusting mechanism 1E is arranged between the feeding frames 1A on the inner and outer sides of the material channel 1D for adjusting the angle. Isolation grids 1J are arranged on the main frame 2A and the movable frame 2B on both sides of the material channel 1D, and the thickness of the isolation grids 1J is adapted to the set spacing between the main reinforcement mesh 1F and the secondary reinforcement mesh 1G.

[0104] The angle adjusting mechanism 1E includes a cross bar connected between the relatively arranged feeding frames 1A. One end of the cross bar is fixed to the feeding frame 1A on one side of the material channel 1D. The other end of the cross bar is provided with a sleeve 1E2. A long circular hole 1E3 is opened at the top end of the feeding frame 1A adjacent to the other end of the cross bar. The setscrew 1E1 penetrates and connects the sleeve 1E2 and the long circular hole 5C.

[0105] The components for positioning the secondary reinforcement mesh 1G include a card slot 1B provided at the bottom end of the feeding rack 1A and capable of accommodating the secondary reinforcement mesh 1G and the mesh sheet, and a clamping plate 1C distributed on the outer side of the top end of the feeding rack 1A and capable of preventing the secondary reinforcement mesh 1G and the mesh sheet from tipping over. To avoid too many lines in the figure, the mesh sheet is not drawn in the attached drawing.

[0106] The spacing between the oppositely arranged isolation fences 1J is adapted to the main reinforcement mesh 1F, and the feeding ends of the oppositely arranged isolation fences 1J are in an eight-shaped expansion towards the feeding direction.

[0107] The isolation fence 1J is a fence structure made of metal pipes, and the set spacing between the main reinforcement mesh 1F and the secondary reinforcement mesh 1G corresponds to the outer diameter of the metal pipes.

[0108] A movable frame 2B reciprocates along a direction perpendicular to the material channel 1D on the main frame 2A, and the isolation fence 1J on one side and the discharging end of the corresponding feeding rack 1A are arranged on the movable frame 2B.

[0109] The width adjustment, traction, and welding devices of the mesh covering hook machine in this embodiment work as follows:

[0110] Width adjustment device: Place the main reinforcement mesh 1F between the front inner column 3H2 and the front outer column 3H1. By adjusting the width adjustment device 2 between the main frame 2A and the movable frame 2B, the spacing between the main frame 2A and the movable frame 2B is adjusted in place under the action of the handwheel 2E, the sprocket 2C, the chain 2D, the guide wheel 2J, and the first guide rail 2H.

[0111] Traction device: The front inner column 3H2 is driven by the movable frame 2B and moves along the connecting frame 3T in a direction perpendicular to the material channel 1D until it reaches the proper position, thus completing the adjustment of the front inner column 3H2 and the front outer column 3H1. The principle of adjusting the distance between the rear inner column 3J2 and the rear outer column 3J1 is the same. Place the mesh and the auxiliary bar mesh 1G from the inside to the outside into the gap between the front inner column 3H2 and the fixed rod 3U, and use fixing parts to fix the front end of the auxiliary bar mesh 1G to the main bar mesh 1F. Start the reciprocating motion of the traction cylinder 3A. The power output end of the traction cylinder 3A drives the lower end of the front column 3H through the first crank-link mechanism 3N. The sliding sleeve 3F on the outside of the lower end of the front column 3H reciprocates along the guide rod 3G. The roller 3W on the connecting frame 3T at the lower end of the front column 3H rolls along the lower surface of the material channel 1D. The upper end of the front column 3H is synchronously driven under the action of the first connecting rod 3Q and the second crank-link mechanism 3P. The rear column 3J is driven under the action of the third connecting rod 3S. The sliding sleeves 3F on the outside of the upper and lower ends of the front column 3H and the rear column 3J reciprocate along the guide rod 3G. The rollers 3W on the connecting frames at the upper and lower ends of the front column 3H and the rear column 3J roll along the second guide rail 3V or the surface of the material channel 1D respectively. The traction hook 3M retreats to the end of the stroke in the direction opposite to the material transportation. The traction hook 3M bounces back and resets under the action of the return spring 3L, hooks the main bar mesh 1F and the auxiliary bar mesh 1G, and drives the two to be transported to the end of the stroke along the material transportation direction. The traction hook 3M retreats under the action of the front column 3H and the rear column 3J. The traction hook 3M is pressed by the main bar mesh 1F and the auxiliary bar mesh 1G, causing the return spring 3L to contract, completing one working cycle. The traction hook 3M returns to the end of the stroke to start the next working cycle.

[0112] Welding device: The exposed ends of the steel wires 3B welded on the main bar mesh 1F in the material channel 1D enter the auxiliary bar mesh 1G under the push of the cylinders and the pressing plates on both sides of the material channel. The welding torch completes the welding of the exposed ends of the steel wires 3B and the auxiliary bar mesh 1G under the action of the third crank-link mechanism 4B driven by the welding cylinder 4A.

Claims

1. The net-covering hook welding machine includes a frame, a feeding device (1) located at the material input end of the frame, and a welding device (4) adapted to the welding station of the steel wire (3B) exposed on the main reinforcement mesh (1F) and the secondary reinforcement mesh on the material channel (1D); characterized in that The rack includes a main frame (2A) and a movable frame (2B) disposed on the main frame (2A). The movable frame (2B) reciprocally cooperates with the main frame (2A) along a direction perpendicular to the material passage (1D) through a width adjusting device (2), and further includes: A. A primary bending device (5), wherein the second support frame (5C) is symmetrically disposed on the movable frame (2B) and the main frame (2A) on both sides of the material passage (1D) behind the welding station. The shaft rod (5B) is driven by a primary bending cylinder (5A) disposed on the second support frame (5C) to reciprocate longitudinally. Second fixing plates (5E) are longitudinally spaced on the second support frame (5C) adjacent to the material passage (1D). On one side of the shaft rod (5B) adjacent to the material passage (1D), movable blocks (5F) are longitudinally spaced and fixed. The movable blocks (5F) are provided with working surfaces for bending the exposed ends of the steel wires (3B) through relative movement with the second fixing plates (5E); B. A secondary bending device (6), wherein columns (6F) are symmetrically disposed and slidably assembled on the movable frame (2B) and the main frame (2A) on both sides of the material passage (1D) behind the primary bending station. The columns (6F) reciprocate in a direction perpendicular to the material passage (1D) under the drive of a linear drive source. On the inner side of the columns (6F) facing the material passage (1D), pressing plates (6J) are longitudinally spaced and can act on the exposed bent portions of the steel wires (3B) formed at the primary bending station.

2. The net-covered hook welding machine according to claim 1, wherein The bottom of the movable frame (2B) is in rolling cooperation with the first guide rail (2H) on the main frame (2A) through guide wheels (2J) along a direction perpendicular to the material passage (1D).

3. The net-covered hook welding machine according to claim 1, characterized in that The said working surface is a slope surface.

4. The net-covered hook welding machine according to claim 1, characterized in that The second support frame (5C) includes vertical plates disposed on both sides of the shaft rod (5B), a bottom plate fixed to the bottom of the vertical plates and used for connecting with the main frame (2A) or the movable frame (2B). The primary bending cylinder (5A) is fixed to the top of the second support frame (5C) through a connecting frame, and its power output end is connected to the upper end of the shaft rod (5B).

5. The net-covered hook welding machine according to claim 1 or 4, characterized in that The bottom of the shaft rod (5B) is in sliding fit with a bushing (5D) disposed on the second support frame (5C) through sleeving.

6. The net-covered hook welding machine according to claim 1, characterized in that The upper and lower ends of the columns (6F) are respectively in sliding fit with the third guide rails (6A) disposed on the movable frame (2B) and the main frame (2A) through upper sliding sleeves (6B) and lower sliding sleeves (6C).

7. The net-covered hook welding machine according to claim 6, wherein The third guide rails (6A) are respectively connected with the movable frame (2B) or the main frame (2A) through upper fixing seats (6D) and lower fixing seats (6E).

8. The net-covered hook welding machine according to any one of claims 1, 6 or 7, characterized in that The pressing plates (6J) are connected with the columns (6F) through a spacing adjusting mechanism.

9. The net-covering hook welding machine according to claim 8, wherein The spacing adjusting mechanism selects a lead screw and nut mechanism or a parallelogram mechanism.

10. The net-covered hook welding machine according to claim 9, characterized in that the spacing The adjusting mechanism selects a lead screw and nut mechanism. The middle of the second lead screw (6H) and the second nut (6G) fixed on the column (6F) form a feed transmission pair.

11. The net-covered hook welding machine according to claim 1 or 2, characterized in that The width adjusting device (2) adopts a lead screw feed mechanism, including at least three first nuts (2G) fixed on the movable frame (2B). Each first nut (2G) forms a plane parallel to the material conveying direction. The outer end of the first lead screw (2F) is disposed on the main frame (2A) and is driven by a driving wheel.

12. The width-adjusting device of the net-covered hook welding machine according to claim 11, characterized in that The driving wheel is selected from a handwheel, or one or a combination of a handwheel and a sprocket-chain transmission pair.

13. The width adjustment device of the net-covered hook welding machine according to claim 12, characterized in that The driving wheel adopts a handwheel and a sprocket-chain transmission pair. The sprocket-chain transmission pair includes sprockets (2C) and a chain (2D) connected between the sprockets (2C). A handwheel (2E) is coaxially and drivingly engaged with one of the sprockets (2C).

14. The width adjustment device of the net-covered hook welding machine according to any one of claims 11, 12 or 13, characterized in that There are four groups of lead screw feeding mechanisms, which are symmetrically arranged up and down between the movable frame (2B) and the main frame (2A).

15. The net-covered hook welding machine according to claim 1 or 2, characterized in that It also includes a traction device (3) for material conveying. The traction device (3) includes front columns (3H) and rear columns (3J) distributed on both sides of the front and rear ends of the material passage (1D). The distance between the relatively arranged front columns (3H) and between the rear columns (3J) is realized by a connecting frame (3T) and the movable frame (2B) with a slidable fit of adjustable pitch. The connecting frame (3T) is in rolling fit with the main frame (2A) through rollers (3W). The traction cylinder (3A) drives the front columns (3H) and the rear columns (3J) to reciprocate synchronously along the material conveying direction through a crank-link mechanism and a linkage rod. The stroke of the crank-link mechanism is an integer multiple of the cell length of the main rib mesh (1F) or the secondary rib mesh (1G). Traction hooks (3M) with self-resetting functions are assembled on the inner sides of the front columns (3H), the inner sides of the rear columns (3J), and the fixed rods (3U) arranged at intervals on the outer sides of the front columns (3H). The self-resetting direction is towards the material passage (1D). The bending direction of the traction hook (3M) is towards the discharging direction and is adapted to the main rib mesh (1F) or the secondary rib mesh (1G).

16. The net-covered hook welding machine according to claim 15, wherein The front columns (3H) include front outer columns (3H1) and front inner columns (3H2) located on both sides of the front end of the material passage (1D). The front inner columns (3H2) are arranged on the movable frame (2B) and reciprocally cooperate with it along the material conveying direction. The front outer columns (3H1) and the front inner columns (3H2) are slidably assembled in a direction perpendicular to the material passage (1D) through guide rods on the connecting frame (3T).

17. The net-covered hook welding machine according to claim 16, characterized in that The front inner columns (3H2) are reciprocally cooperated with the movable frame (2B) along the material passage (1D) through sliding sleeves (3F) and guide rods (3G) arranged on the movable frame (2B).

18. The net-covered hook welding machine according to claim 16, characterized in that The lower ends of the front outer columns (3H1) and the front inner columns (3H2) are respectively connected to the power output ends of the relatively arranged first crank-link mechanism (3N). The power output of the traction cylinder (3A) is connected to the power input end of the first crank-link mechanism (3N). The upper ends of the front outer columns (3H1) and the front inner columns (3H2) are respectively connected to the power output ends of the relatively arranged second crank-link mechanism (3P). The first crank-link mechanism (3N) and the second crank-link mechanism (3P) are linked through a first connecting rod (3Q).

19. The net-covered hook welding machine according to claim 18, characterized in that The relatively arranged second crank-link mechanisms (3P) are linked through a second connecting rod (3R).

20. The net-covered hook welding machine according to claim 15, characterized in that The rear upright posts (3J) include rear outer upright posts (3J1) and rear inner upright posts (3J2) located on both sides of the front end of the material channel (1D). The rear inner upright posts (3J2) are arranged on the movable frame (2B) and reciprocally cooperate with it along the material conveying direction. The rear outer upright posts (3J1) and the rear inner upright posts (3J2) are slidably assembled perpendicular to the direction of the material channel (1D) through the guide rods on the connecting frame (3T). The rear inner upright posts (3J2) are reciprocally cooperated with the movable frame (2B) along the direction of the material channel (1D) through the sliding sleeves (3F) and the guide rods (3G) on the movable frame (2B).

21. The net-covered hook welding machine according to claim 15 or 20, characterized in that The first fixed plates (3K) are assembled on the inner sides of the front upright posts (3H) and the rear upright posts (3J). The ends of the towing hooks (3M) are rotatably assembled with the first fixed plates (3K), and a return spring (3L) is provided at the adjacent position between the middle parts of the towing hooks (3M) and the first fixed plates (3K).

22. The net-covered hook welding machine according to claim 15, characterized in that The linkage rod is the third connecting rod (3S) assembled between the connecting frames (3T) at the adjacent positions of the front outer upright posts (3H1) and the front inner upright posts (3H2) and the connecting frames (3T) at the adjacent positions of the rear outer upright posts (3J1) and the rear inner upright posts (3J2).

23. The net-covered hook welding machine according to claim 15, characterized in that The towing hooks (3M) on the inner sides of the front upright posts (3H) and the rear upright posts (3J) are adapted to the main reinforcement mesh (1F); the towing hooks (3M) assembled on the fixed rods (3U) spaced on the outer sides of the front upright posts (3H) are adapted to the secondary reinforcement mesh (1G).

24. The net-covered hook welding machine according to claim 1, wherein The welding device (4) includes first support frames (4D) respectively fixed on the main frame (2A) and the movable frame (2B), welding torches (4C) arranged on the first support frames (4D) and adapted to the welding stations of the exposed ends of the steel wires (3B) on the main reinforcement mesh (1F) and the secondary reinforcement mesh (1G). The welding cylinders (4A) arranged on the first support frames (4D) control the opening and closing of the welding heads of the welding torches (4D) through the third crank connecting rod mechanism (4B). At the feeding end of the welding device (4), there are cylinders and pressing plates for attaching the secondary reinforcement mesh (1G) and the mesh sheets to the surface of the main reinforcement mesh (1F).

25. The net-covered hook welding machine according to claim 1, wherein It further includes a feeding device (1), which includes a material channel (1D) arranged on the outer side of the feeding end of the main frame (2A) and along the material conveying direction. The feeding frames (1A) are spaced on both the left and right sides of the material channel (1D) and form an angle not greater than 90° with it. Components for positioning the secondary reinforcement mesh (1G) and the mesh sheets are arranged on the feeding frames (1A). An angle adjusting mechanism (1E) for adjusting the angle is arranged between the feeding frames (1A) on the inner and outer sides of the material channel (1D). Isolation fences (1J) are arranged on the main frame (2A) and the movable frame (2B) on both the left and right sides of the material channel (1D), and the thickness of the isolation fences (1J) is adapted to the set spacing between the main reinforcement mesh (1F) and the secondary reinforcement mesh (1G).

26. The net-covered hook welding machine according to claim 25, characterized in that The described angle adjustment mechanism (1E) includes a cross bar connected between the relatively arranged feeding frames (1A). One end of the cross bar is fixed to the feeding frame (1A) on one side of the material channel (1D), and a sleeve (1E2) is provided at the other end of the cross bar. A long circular hole (1E3) is formed at the top end of the feeding frame (1A) adjacent to the other end of the cross bar, and a setscrew (1E1) passes through and connects the sleeve (1E2) and the long circular hole (5C).

27. The feeding device of the net-covered hook welding machine according to claim 25, characterized in that The member for positioning the secondary rib mesh (1G) and the mesh sheet includes a slot (1B) provided at the bottom end of the feeding frame (1A) and capable of accommodating the secondary rib mesh (1G), and clamping plates (1C) distributed on the outer side of the top end of the feeding frame (1A) and capable of preventing the mesh sheet and the secondary rib mesh (1G) from tipping over.

28. The feeding device of the net-covered hook welding machine according to claim 25, characterized in that The spacing between the relatively arranged isolation fences (1J) is adapted to the main rib mesh (1F), and the feeding ends of the relatively arranged isolation fences (1J) are in an eight-shaped expansion towards the feeding direction.

29. The feeding device of the net-covered hook welding machine according to claim 28, characterized in that The isolation fence (1J) is a fence structure made of a metal pipe, and the set spacing between the main rib mesh (1F) and the secondary rib mesh (1G) corresponds to the outer diameter of the metal pipe.

30. The feeding device of the net-covered hook welding machine according to claim 25, 28 or 29, characterized in that A movable frame (2B) reciprocates along a direction perpendicular to the material channel (1D) on the main frame (2A), and the discharging ends of the isolation fence (1J) on one side and the corresponding feeding frame (1A) are arranged on the movable frame (2B).

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