A material clamping mechanism, a multi-piece feeding device and an arch main reinforcement feeding device

Abstract

The present invention discloses a material clamping mechanism, a multi-piece feeding device and an arch main reinforcement feeding device. The clamping mechanism includes a box-shaped material box. A material passing channel for long strip materials is formed at the bottom of the box-shaped material box. A cam or an eccentric wheel is arranged beside the material passing channel. The cam or the eccentric wheel is rotatably arranged between the two side walls of the box-shaped material box through a hinge pin. A spring member for driving the cam or the eccentric wheel to rotate is arranged between the box-shaped material box and the cam or the eccentric wheel, so as to narrow the material passing channel. The multi-piece feeding device is constituted by arranging a plurality of clamping mechanisms on a base frame driven by a pushing oil cylinder; the arch main reinforcement feeding device is constituted by a multi-piece feeding device in which the pushing oil cylinder and the base frame can swing in the same plane. The beneficial effects of the present invention are that the clamping mechanism can automatically clamp and release materials, and has a simple structure and a compact layout. The multi-piece feeding device can realize synchronous pushing of a plurality of materials; the arch main reinforcement feeding device can meet the feeding requirements for continuous production of arch welding.

Description

Technical Field

[0001] The present invention relates to a feeding auxiliary facility for a continuous production line, in particular to a material clamping mechanism, a multi-piece feeding device and a main arch bar feeding device. Background Art

[0002] In a continuous blanking device or a welding production line, in order to ensure the normal progress of continuous production, an intermittent feeding method needs to be used for cooperation. There are various existing intermittent feeding methods, including a swing rod feeding method with a traditional structure, a reciprocating moving slide table feeding method, and feeding methods of robots and truss manipulators in an intelligent production line, etc. The material clamping methods of these feeding methods include mechanical jaws, magnetic adsorption and vacuum adsorption, etc. And the mechanical jaws mainly adopt power drives such as cylinders, hydraulic cylinders, electric cylinders or linear modules with complex structures. And these feeding methods usually have relatively high requirements for environmental adaptability. For example, requirements for air cleanliness, temperature, humidity, etc.; relatively high requirements for the size and accuracy of applicable objects. Therefore, most of these feeding mechanisms can only be used in the field of machining. For large-sized welded parts such as house trusses and tunnel arches with low requirements for machining environment cleanliness, temperature, and welding accuracy, it is difficult to apply them, and they also have the deficiencies of complex structure, many fault points, difficult maintenance, and high use and maintenance costs. And in the continuous welding of trusses, steel skeletons and arches, there are multiple main bars to be conveyed simultaneously, and the existing feeding devices cannot meet the requirements of multiple centralized arrangements.

[0003] In addition, the most effective way to fabricate the lattice girder commonly used in existing tunnel arches is the die welding method that combines a welding fixture and a welding robot to improve efficiency and ensure welding quality. The process of the existing arch die welding method is to complete the welding of the welding pieces on one prism surface of the truss separately and then combine multiple welding pieces together. There are mainly two ways to weld the welding pieces. One is to first bend the main reinforcement through a forming die to make it plastically deformed into an arch shape, and then fix the two arched main reinforcements that make up the welding piece on the die for cross-bar welding. The other is to fix the two main reinforcements that make up the welding piece on the die and form an arch shape under elastic deformation through the die, and then make it form a stable structure by welding the cross-bars. This method is also the most efficient welding method at present. Since the above two fabrication modes can only form one welding piece in the lattice girder, and the overall formation of the arch still requires the combined welding of the welding pieces together. In a polygon with an odd number of sides in the arch cross-section, either a double main reinforcement structure is adopted. After welding the welding pieces equal to the number of sides, they are combined and welded together through direct welding between the main reinforcements; or when combining, it is also necessary to weld the cross-bars on two prism surfaces, which severely restricts the fabrication speed of the arch. Therefore, in the fabrication of the arch, there is also a need to centrally arrange the clamping of multiple materials to ensure the continuous welding of the arch or the welding pieces that make up the arch. However, since the lengths of the main reinforcements on different arcs are different, when multiple main reinforcements are conveyed simultaneously, the simple combination of multiple feeding devices cannot meet the feeding requirements. Therefore, further improvement is needed. Summary of the Invention

[0004] The first object of the present invention is to provide a simple-structured material clamping mechanism in view of the complex structure of the material clamping mechanism in existing intermittent feeding. This mechanism is provided with a cam or an eccentric wheel beside the material passage, and uses the eccentric pressing principle to press the long strip material, so as to clamp the material and move it to the target position together. During the return movement, the cam or the eccentric wheel rotates reversely under the drive of the material to release the material and achieve feeding. In this way, the intermittent feeding purpose is achieved by cycling. The second object of the present invention is to provide a feeding device to meet the continuous welding requirements of a linear truss or a steel skeleton. The third object of the present invention is to provide a main reinforcement feeding device for arch welding to meet the continuous welding requirements of the arch.

[0005] To achieve the first object, the present invention adopts the following technical solutions.

[0006] A material clamping mechanism includes a box-shaped material box. A material passing channel for long strip materials is formed at the bottom of the box-shaped material box. A cam or an eccentric wheel is provided beside the material passing channel. The cam or the eccentric wheel is rotatably arranged between the two side walls of the box-shaped material box through a hinge pin; a spring member for driving the cam or the eccentric wheel to rotate is provided between the box-shaped material box and the cam or the eccentric wheel to narrow the material passing channel.

[0007] The material clamping mechanism adopting the foregoing technical solution has a tendency for the long strip material to reverse and exit relative to the material clamping mechanism during the feeding stroke. Under the frictional force between the material and the cam or eccentric wheel, this exit tendency drives the cam or eccentric wheel to rotate in the moving direction, and this rotation narrows the material passage. The cooperation between the passage wall and the working surface of the cam or eccentric wheel presses the long strip material against the box-shaped material box, is clamped by the material clamping mechanism, and thus is dragged and moved by the material clamping mechanism; after the feeding stroke is in place, the material is received by the destination component and keeps its position unchanged, and the box-shaped material box shows a tendency to retract, which is the same as the situation where the long strip material is inserted into the box-shaped material box. The cam or eccentric wheel rotates in the direction of loosening the material driven by the material, releases the state of squeezing the material, and releases the material, so that the material clamping mechanism can return alone, and through the automatic locking and unlocking of the material, the feeding cycle in the pushing or pulling mode is completed. Its structure is simple, the layout is compact, there are few fault points, the failure rate is low, it is beneficial to centrally arrange multiple material clamping mechanisms on the same carrier to realize synchronous equal-length feeding of multiple pieces, and provides a strong guarantee for the continuous production mode of linear trusses or arch frames. And the cam or eccentric wheel can reliably clamp materials with different thicknesses or different diameters, and can automatically compensate after wear, extending the service life. Among them, the spring member uses the elastic force applied to the cam or eccentric wheel to drive the cam or eccentric wheel to maintain the locked state to improve the locking reliability and ensure the stability of the repeated pushing distance. Among them, the spring member includes spring plates, tension springs, compression springs, torsion springs, etc.; using spring members with different structural forms, the difference is only in the installation position and installation method, as long as the same locking and holding force loading effect can be achieved. Obviously, rubber bands also belong to tension springs; disc springs also belong to compression springs. In addition, the cam or eccentric wheel can be arranged in a single or two settings. The clamping mechanism with a single structure needs to rely on the third component provided with the cam or eccentric wheel to provide a material leaning basis, and clamps the material with the help of the leaning basis.

[0008] Preferably, patterns or one-way teeth are formed on the cam working surface of the cam or eccentric wheel. To utilize the uneven characteristics of the patterns to increase the friction coefficient between the cam or eccentric wheel and the material, increase the frictional resistance, avoid slipping, improve the feeding reliability, and ensure the feeding accuracy; adopting the one-way tooth structure makes the cam or eccentric wheel form a pawl similar to that in the ratchet and pawl mechanism, eliminating the slipping hidden danger between the cam or eccentric wheel and the material.

[0009] Preferably, a limiting member is fixedly connected to the box-shaped material box, and the limiting member limits the extreme position of the rotation of the cam or eccentric wheel. The limiting member is used to form a limit on the extreme position of the cam or eccentric wheel rotating towards the locking direction, so that the material passing channel remains large enough to facilitate the smooth insertion of the material when passing through, and improves the operation convenience.

[0010] Preferably, the cam or eccentric wheel is in a fan shape or a lever shape. The fan shape is beneficial to the requirement of structural compactness; the lever shape provides an alternative way to increase the flexibility of selection.

[0011] To achieve the second object, the present invention adopts the following technical solutions.

[0012] A multi-piece feeding device includes a base frame and a pushing oil cylinder for pushing the base frame to move; at least two material clamping mechanisms for achieving the first object of the invention are provided on the base frame.

[0013] The multi-piece feeding device adopting the foregoing technical solutions arranges a plurality of material clamping mechanisms on the same base frame driven by the pushing oil cylinder to move by taking advantage of the characteristics of simple structure and compact layout of the material clamping mechanisms. The automatic locking and unlocking functions of the material clamping mechanisms realize the intermittent equal-length synchronous feeding of a plurality of main bars, truss beams or steel frame beams on the steel frame truss. By controlling the position of the base frame through a travel switch, the feeding length control and the repeated precision requirement of the feeding length can be conveniently achieved, so that the repeated welding work content can be completed at a fixed welding station, thereby providing a guarantee for the continuous welding production of a straight truss or a steel frame, significantly improving the production efficiency, reducing the production cost, saving the labor consumption, and reducing or eliminating potential safety hazards.

[0014] Preferably, the base frame is supported by a support platform, and rollers are provided at the lower end of the base frame. To reduce the movement resistance of the base frame, reduce the specification of the pushing oil cylinder, and reduce the energy consumption.

[0015] Preferably, the base frame includes two vertically and parallelly arranged vertical plates, and the two vertical plates are connected by a connecting plate; the material clamping mechanism is arranged on the connecting plate; the pushing oil cylinder is connected to the corresponding side vertical plate. To increase the longitudinal structural stability by using the two vertical plates and ensure the safety of the movement of the base frame. At the same time, a concealed installation space is provided for the material clamping mechanism, and the structure is convenient for layout.

[0016] Further preferably, strip holes for long strip-shaped materials to pass through are provided on the vertical plates; long strip holes for connecting the material clamping mechanisms are provided on the connecting plate. The number and position of the holes for long strip-shaped materials to pass through are determined according to the positions of the truss beams or steel frame beams arranged on the welded product. By setting these holes as strip holes and setting the holes on the connecting plate for installing the material clamping mechanism as long strip holes, the adjustment requirements when the cross-sectional shapes of the welded products are the same but the cross-sectional size specifications are different can be met, thereby broadening the applicable range.

[0017] To achieve the third object, the present invention adopts the following technical solutions.

[0018] An arch main bar feeding device is composed of the multi-piece feeding device for achieving the second object of the invention, and both the base frame and the pushing oil cylinder can swing within the plane of the support platform.

[0019] The main reinforcement feeding device for the arch support adopting the foregoing solution is applicable to the main reinforcement feeding during the continuous welding of tunnel arch supports or welding pieces forming the arch support under the condition of formwork welding. The base frame is driven by an oil cylinder to move back and forth. When the base frame moves forward, at least two material clamping mechanisms arranged thereon clamp the corresponding number of main reinforcement bars and move with the base frame; when the base frame returns, the fed part of the main reinforcement bars is retained on the formwork and forms a relative fixation with the formwork, and the material clamping mechanism releases the clamping state with the reinforcement bars through its one-way characteristic and returns with the base frame; the moving direction of the base frame is consistent with the telescopic direction of the oil cylinder piston. By utilizing the elastic deformation characteristic of the reinforcement bars, the synchronous pushing of multiple reinforcement bars at the equal-diameter arc positions on the arch support can be realized. The spiral ribs of the deformed steel bar can be used to form a friction connection pair with the working surface of the clamping jaw cam or eccentric wheel to achieve automatic locking and unlocking. When pushing the reinforcement bars at different arcs on the arch support simultaneously, since the reinforcement bars are restricted by the section retained on the formwork, the arcs of the sections to be fed are the same but the lengths are different. By arranging both the base frame and the pushing oil cylinder into structures that can swing in the same plane and cleverly combining with the one-way characteristic of the material clamping mechanism, under the action of the reinforcement bars in the retention section on the formwork, the base frame can adaptively swing to an appropriate angle posture according to the change of the feeding length. Since the base frame is supported on the support platform, it has the freedom of movement and rotation within the support surface. When the oil cylinder can also swing within the plane of the support platform, the base frame can be automatically adjusted to a reasonable posture and position. Among them, both the base frame and the pushing oil cylinder can swing within the plane of the support platform, and can be hinged by a pin shaft hinged structure with the hinge axis perpendicular to the plane of the support platform, or can also be hinged by a spherical hinged structure with universal characteristics.

[0020] Preferably, the material clamping mechanism is connected to the connecting plate only through a single mounting hole on the box-shaped material box. By utilizing the rotatable characteristic of the connection through a single mounting hole, when welding arch supports with different arcs, the material clamping mechanism can adaptively rotate with the base frame.

[0021] The beneficial effects of the present invention are that the material clamping mechanism can automatically clamp and release materials, with a simple structure, a compact layout, few fault points, and a low failure rate, which is conducive to concentrating multiple material clamping mechanisms on the same carrier to achieve synchronous feeding of multiple pieces, providing a strong guarantee for the continuous production mode of truss or arch support welding. The multi-piece feeding device can realize the equidistant synchronous pushing of multiple materials by arranging multiple material clamping mechanisms on the same base frame, and is applicable to the continuous welding production of linear trusses and steel skeletons; the main reinforcement feeding device for the arch support can realize the continuous production of arch support or arch support welding piece welding by improving the multi-piece feeding device, significantly improving the production efficiency of arch support welding. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the material clamping mechanism in the feeding stroke state in the present invention.

[0023] Figure 2 It is a schematic structural view of the material clamping mechanism in the return stroke state in the present invention.

[0024] Figure 3 It is a schematic structural view of another structural form of the material clamping mechanism in the present invention.

[0025] Figure 4 It is the main schematic view of the multi-piece feeding device structure in the present invention.

[0026] Figure 5 It is the present invention Figure 4 View in the direction of A.

[0027] Figure 6 It is a partial schematic view of the multi-piece feeding device structure in the present invention, wherein the material clamping mechanism is in the feeding stroke state.

[0028] Wherein, Figure 4 、 Figure 5 and Figure 6 also show the structure of the main arch bar feeding device. Specific embodiments

[0029] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the described embodiments.

[0030] Example 1, see Figure 1 、 Figure 2 , a material clamping mechanism, including a box-shaped material box 4. A material passing channel for long strip materials is formed at the bottom of the box-shaped material box 4. A cam or eccentric wheel 5 is arranged beside the material passing channel. The cam or eccentric wheel 5 is rotatably arranged between the two side walls of the box-shaped material box 4 through a hinge pin 6; a spring member 7 for driving the cam or eccentric wheel 5 to rotate is arranged between the box-shaped material box 4 and the cam or eccentric wheel 5 to narrow the material passing channel.

[0031] Among them, the cam or eccentric wheel 5 is fan-shaped; the spring member 7 is composed of a compression spring, which is installed in the spring installation tube 7a. The spring installation tube 7a is fixed on the box-shaped material box 4, and a plugging block 7b is provided at one end of the tube opening to form a blind hole structure for the tube hole. The free end of the spring extends out from the open tube opening and abuts against the side surface of the cam or eccentric wheel 5, and the abutting point is close to the high elevation end of the working surface of the cam or eccentric wheel 5. The distance from the center of the cam or eccentric wheel 5 to the edge of the working surface gradually decreases from the high elevation end to the low elevation end of the working surface; the hinge axis of the cam or eccentric wheel 5 is located on its central axis. Patterns or one-way teeth 5a are formed on the cam working surface of the cam or eccentric wheel 5; a limiting member 8 is fixedly connected to the box-shaped material box 4, and the limiting member 8 limits the extreme position of the rotation of the cam or eccentric wheel 5; the limiting member 8 is composed of a member such as a pin, a column or a nail, and the limiting member 8 is fixedly connected to the box-shaped material box 4 and is used to abut against the side edge of the cam or eccentric wheel 5 at the low elevation end of the working surface.

[0032] In this embodiment, the material clamping mechanism is only provided with a single cam or eccentric wheel 5, and the box-shaped material box 4 provided with clamping jaws forms a leaning basis for the strip-shaped material. When the box-shaped material box 4 is in a U-shaped structure, the groove wall at the bottom of the box-shaped material box 4 abuts against the material; when the box-shaped material box 4 has blocking plates at both U-shaped ends, a material passing hole can be opened on the blocking plate. When there is a distance between the hole wall and the bottom wall of the groove, a part of the hole wall close to the bottom wall forms a leaning basis; when the hole wall close to the bottom of the groove coincides with the bottom wall of the groove, the groove wall at the bottom of the box-shaped material box 4 abuts against the material.

[0033] In this embodiment, in addition to being composed of a compression spring, the spring member 7 can also adopt spring sheets, tension springs, compression springs, torsion springs, etc.; when adopting spring members with different structural forms, the difference lies only in the installation position and installation method, as long as the same elastic loading effect can be achieved. Obviously, rubber bands also belong to tension springs; disc springs also belong to compression springs. And the installation methods of the above spring members are conventional techniques in the art and will not be elaborated here.

[0034] Embodiment 2, see Figure 3 , the cam or eccentric wheel 5 is provided in two, and a material passing channel is formed between the two cams or eccentric wheels 5, and the two cams or eccentric wheels 5 jointly form automatic clamping and automatic release of the strip-shaped material.

[0035] The working process of the material clamping mechanisms in Embodiments 1 and 2 is as follows. When the material clamping mechanism moves in the direction shown by the upward arrow Figure 1 , this moving direction is defined as the feeding stroke, as Figure 2When moving in the direction shown by the upper arrow, this moving direction is defined as the return stroke or return journey; when the box-shaped material box 4 moves in the feeding stroke, the material clamping mechanism performs automatic locking through a cam or eccentric wheel 5, clamps the long strip material and moves synchronously until the end of the feeding stroke; after completion, the long strip material is received and stays at the sending position, the material clamping mechanism is automatically unlocked through the cam or eccentric wheel 5, releases the long strip material, and the box-shaped material box 4 returns alone in the reverse direction indicated by the upper arrow until it returns to its original position, thus completing one feeding cycle of the long strip material. In this return stroke state, it is equivalent to when the box-shaped material box 4 is stationary, the long strip material moves relative to the box-shaped material box 4 in the direction indicated by the lower arrow, which is the same as the state when the long strip material is inserted into the material passing channel from the right side. Figure 2 When the box-shaped material box 4 returns alone in the reverse direction indicated by the upper arrow until it returns to its original position, thus completing one feeding cycle of the long strip material. In this return stroke state, it is equivalent to when the box-shaped material box 4 is stationary, the long strip material moves relative to the box-shaped material box 4 in the direction indicated by the lower arrow, which is the same as the state when the long strip material is inserted into the material passing channel from the right side. Figure 2 When the box-shaped material box 4 returns alone in the reverse direction indicated by the upper arrow until it returns to its original position, thus completing one feeding cycle of the long strip material. In this return stroke state, it is equivalent to when the box-shaped material box 4 is stationary, the long strip material moves relative to the box-shaped material box 4 in the direction indicated by the lower arrow, which is the same as the state when the long strip material is inserted into the material passing channel from the right side. Figure 2 When the box-shaped material box 4 returns alone in the reverse direction indicated by the upper arrow until it returns to its original position, thus completing one feeding cycle of the long strip material. In this return stroke state, it is equivalent to when the box-shaped material box 4 is stationary, the long strip material moves relative to the box-shaped material box 4 in the direction indicated by the lower arrow, which is the same as the state when the long strip material is inserted into the material passing channel from the right side.

[0036] Example 3, see Figure 4 、 Figure 5 and Figure 6 A multi-piece feeding device, including a base frame 1 and a pushing oil cylinder 2 for pushing the base frame 1 to move; at least two material clamping mechanisms of Example 1 or 2 are provided on the base frame 1.

[0037] Among them, the base frame 1 is supported by a support platform 3, and rollers 9 are provided at the lower end of the base frame 1. The base frame 1 includes two vertical and parallel vertical plates 1a, and the two vertical plates 1a are connected by a connecting plate 1b; the material clamping mechanism is provided on the connecting plate 1b; the pushing oil cylinder 2 is connected to the corresponding vertical plate 1a; a strip hole for the long strip material to pass through is provided on the vertical plate 1a; a long strip hole for connecting the material clamping mechanism is provided on the connecting plate 1b.

[0038] The remaining structures of this embodiment are the same as those of Example 1 or 2, and will not be described in detail here.

[0039] Example 4, see Figure 4 、 Figure 5 and Figure 6 An arch main reinforcement feeding device is composed of the multi-piece feeding device of Example 3, and both the base frame 1 and the pushing oil cylinder 2 can swing within the plane of the support platform 3; specifically, the base frame 1 and the pushing oil cylinder 2 are hinged through a first hinge shaft 11, the pushing oil cylinder 2 is hinged to an oil cylinder mounting seat 10 through a second hinge shaft 12, the oil cylinder mounting seat 10 is relatively fixed to the support platform 3, and both the first hinge shaft 11 and the second hinge shaft 12 are vertically arranged perpendicular to the support surface on the support platform 3.

[0040] Among them, the material clamping mechanism is only connected to the connecting plate 1b through a single mounting hole 4a on the box-shaped material box 4.

[0041] The remaining structures of this embodiment are the same as those of Example 3, and will not be described in detail here.

[0042] In this embodiment, the hinge connection between the base frame 1 and the pushing oil cylinder 2, as well as the hinge connection between the pushing oil cylinder 2 and the hinge shaft of the oil cylinder mounting support 10, can also be replaced by a spherical hinge structure.

[0043] In this implementation, when used for the welding and feeding of the arch frame, the number of material clamping mechanisms and the number of strip holes on the base frame 1 for long strip materials to pass through are both equal to the number of main bars of the arch frame. For example, a quadrilateral arch frame requires 4 to be set; when used for the welding of arch frame welding sheets, generally 2 material clamping mechanisms and 2 strip holes on the base frame 1 for long strip materials to pass through are set. The attached drawing shows the setting method of three material clamping mechanisms, which can be used for welding a triangular arch frame with a triangular cross-section, or simply called a triangular arch frame.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An arch rib main reinforcement feeding device, characterized in that, it is composed of multiple feeding devices. The multiple feeding devices include a base frame (1) and a pushing oil cylinder (2) for pushing the base frame (1) to move; at least two material clamping mechanisms are arranged on the base frame (1); the base frame (1) is supported by a support platform (3), and rollers (9) are arranged at the lower end of the base frame (1); the base frame (1) includes two vertical and parallel vertical plates (1a), and the two vertical plates (1a) are connected by a connecting plate (1b); the material clamping mechanism is arranged on the connecting plate (1b); the pushing oil cylinder (2) is connected to the corresponding side vertical plate (1a); the material clamping mechanism includes a box-shaped material box (4), a material passing channel for long-strip materials is formed at the bottom of the box-shaped material box (4), a cam or eccentric wheel (5) is arranged beside the material passing channel, and the cam or eccentric wheel (5) is rotatably arranged between the two side walls of the box-shaped material box (4) through a hinge pin (6); a spring member (7) for driving the cam or eccentric wheel (5) to rotate is arranged between the box-shaped material box (4) and the cam or eccentric wheel (5) to narrow the material passing channel; both the base frame (1) and the pushing oil cylinder (2) can swing within the plane of the support platform (3); the base frame (1) and the pushing oil cylinder (2) are hinged through a first hinge shaft (11), the pushing oil cylinder (2) is hinged to an oil cylinder mounting seat (10) through a second hinge shaft (12), the oil cylinder mounting seat (10) is relatively fixed to the support platform (3), and both the first hinge shaft (11) and the second hinge shaft (12) are vertically arranged perpendicular to the support surface on the support platform (3).

2. The arch rib main reinforcement feeding device according to claim 1, characterized in that, the material clamping mechanism is connected to the connecting plate (1b) only through a single mounting hole (4a) on the box-shaped material box (4).

3. The arch rib main reinforcement feeding device according to claim 1, characterized in that, strip-shaped holes for long-strip materials to pass through are arranged on the vertical plates (1a); long-strip holes for connecting the material clamping mechanism are arranged on the connecting plate (1b).

4. The arch rib main reinforcement feeding device according to claim 1, characterized in that, patterns or one-way teeth (5a) are formed on the cam working surface of the cam or eccentric wheel (5).

5. The arch rib main reinforcement feeding device according to claim 1, characterized in that, a limiting member (8) is fixedly connected to the box-shaped material box (4), and the limiting member (8) limits the extreme position of the rotation of the cam or eccentric wheel (5).

6. The arch rib main reinforcement feeding device according to claim 1, characterized in that, the cam or eccentric wheel (5) is in a fan shape or a lever shape.

Images