A plurality of conveying machines for U-shaped steel bars

Abstract

The present invention relates to a multi-conveyor for U-shaped steel bars, which includes a frame. On the top of both sides of the frame, there are fixed substrates. On the substrates, there are linear bearings and electric cylinders. A guide rod shaft is sleeved in the linear bearing. At the top of the electric cylinder, there is a first servo motor. The guide rod shaft and the output shaft of the electric cylinder both pass through the substrate and are connected to a load mounting plate. The load mounting plate is arranged on a first bracket. There are several sliding feeding mechanisms on the first bracket. There is at least one second bracket parallel to the first bracket between the frames. There are several material supporting mechanisms on the second bracket. The several feeding mechanisms all drive a first clamping device to move through a first dial component to realize the spacing adjustment on the first bracket. The several material supporting mechanisms all drive a second clamping device to move through a second dial component to realize the spacing adjustment on the second bracket. The present invention not only realizes the fixed-length conveying of multiple U-shaped steel bars, is compatible with U-shaped steel bars with different widths of openings, but also can realize the flexible torque variation between U-shaped steel bars.

Description

Technical Field

[0001] The invention relates to the field of steel bar conveying equipment, in particular to a U-shaped steel bar multiple conveying machine. Background Art

[0002] In the process of construction, steel bar materials are needed, and the steel bars need to be transported and loaded in different processing procedures. During the transportation process, the length cannot be accurately transported, and manual handling and adjustment are required. Secondly, when the steel bars are placed, the steel bars are tilted due to the effect of gravity, which makes it impossible to transport them. At the same time, when the steel bars are too long, they are prone to shaking at both ends. At present, the steel bars on the market are mainly transported in a single way. The existing U-shaped steel bars cannot meet the needs of feeding multiple bars at one time, which reduces work efficiency. Summary of the invention

[0003] In view of the above problems, the present invention provides a U-shaped steel bar multiple conveying machine which can simultaneously realize fixed-length conveying of multiple groups of U-shaped steel bars and automatically adjust the spacing between the multiple groups of steel bars.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a U-shaped steel bar multiple conveying machine, including a frame, base plates are fixedly provided on the top of both sides of the frame, linear bearings and electric cylinders are provided on the base plates, guide rod shafts are sleeved in the linear bearings, a first servo motor is provided on the top of the electric cylinder, the output shafts of the guide rod shafts and the electric cylinders are connected to the load mounting plate through the base plates, the load mounting plate is arranged on the first bracket, a plurality of sliding feeding mechanisms are provided on the first bracket, at least one second bracket parallel to the first bracket is also provided between the frames, a plurality of supporting mechanisms are provided on the second bracket, a first clamping device that is clamped to the first bracket is slidably installed at one end of each of the feeding mechanisms, a second clamping device that is clamped to the second bracket is slidably installed at one end of each of the supporting mechanisms, a plurality of feeding mechanisms are driven by the first dial assembly to move the first clamping device to achieve spacing adjustment in the first bracket, and a plurality of supporting mechanisms are driven by the second dial assembly to move the second clamping device to achieve spacing adjustment in the second bracket.

[0005] Preferably, the feeding mechanism includes a feeding body, a pressing wheel device, a supporting wheel device and a feeding motor. The feeding body includes a bottom plate and two opposite supporting plates, i.e., supporting plate one and supporting plate two, on the bottom plate. The gap between the supporting plate one and the supporting plate two forms a steel bar accommodating cavity. A transmission device for U-shaped steel bar conveying is provided at the lower part of the feeding body. The transmission device includes a chain plate line and a transmission component. The feeding motor drives the transmission component to move, and the movement of the transmission component drives the chain plate line to convey. An encoding component is provided on one side of the transmission device. The encoding component includes an encoder and a first runner connected to the encoder shaft. The first runner is arranged in the steel bar accommodating cavity and fixed to the feeding body through a fixing device. The first runner is used to hold up the lower part of the U-shaped steel bar. At least one set of clamping components is also provided on the feeding body. Each clamping component includes oppositely arranged clamping blocks and a clamping cylinder. The telescopic movement of the clamping cylinder causes the clamping blocks to clamp the lower part of the U-shaped steel bar. An installation groove is provided above the transmission device on the supporting plate one. The pressing wheel device is arranged in the installation groove and used to press the lower part of the U-shaped steel bar. The supporting wheel device is arranged on the supporting plate two and used to hold up the upper part of the U-shaped steel bar. The lower part of the U-shaped steel bar clamped by the clamping blocks is horizontally placed on the chain plate line and the first runner.

[0006] Preferably, the supporting wheel device further includes a first slide rail provided on the outer wall of the supporting plate one. A first slider is slidably connected to the first slide rail. A first connecting block is fixedly installed on one side of the first slider. A lead screw motor is provided at the bottom end of the first slide rail on the outer wall of the supporting plate one. A first lead screw is installed at the end of the output shaft of the lead screw motor. The first lead screw is threadedly connected to the first connecting block. A first tension spring support and a second tension spring support are oppositely arranged on one side of the first connecting block. A tension spring parallel to the first slide rail is provided between the first tension spring support and the second tension spring support. A rotary joint is sleeved on the first tension spring support. The other end of the rotary joint passes through the supporting wheel groove and is connected to a first supporting wheel in the steel bar accommodating cavity. The rotary joint slides on a sliding block connected to the first connecting block, thereby driving the first supporting wheel to rotate by 90°, and driving the first supporting wheel to reset through the tension spring.

[0007] Preferably, the pressing wheel device includes a support base connected to the inner bottom of the placement groove and a pressing wheel cylinder provided on the support base. Both the pressing wheel cylinder and the clamping cylinder are operated through solenoid valves. Inside the support base, a base, a cam follower mounting plate, and a pressing wheel mounting block are sequentially arranged from top to bottom. At least one pressing wheel is provided on the pressing wheel mounting block. Corresponding chutes are provided on opposite sides of the support base. Both sides of the base are connected to the support base through second sliding components. The sliding direction of the second sliding components is the same as the telescopic direction of the pressing wheel cylinder. The bottom of the base is connected to a moving block connecting the cam follower mounting plate through a third sliding component. The movement of the pressing wheel cylinder drives the cam follower on the cam follower mounting plate to move along the chute. The movement of the cam follower drives the moving block to move horizontally forward and backward along the third sliding component, thereby driving the pressing wheel to press and avoid the lower part of the U-shaped steel bar in the steel bar accommodation cavity.

[0008] Preferably, the chute includes an inclined linear chute A section and a linear chute B section. The head end of the chute A section is the highest point of the pressing wheel. The point where the tail end of the chute A section is connected to the head end of the chute B section is the avoidance point of the pressing wheel. The tail end of the chute B section is the lowest point of the pressing wheel. The cam follower drives the pressing wheel to move horizontally in the chute A section through the movement of the cylinder. The cam follower drives the pressing wheel to move vertically in the chute B section through the movement of the cylinder.

[0009] Preferably, the fixing device includes a fixing block and a positioning frame arranged in the steel bar accommodation cavity. The first runner is installed in the positioning frame. The shaft of the encoder passes through the positioning frame and is connected to the shaft of the first runner. The fixing block and the feeding body are fixed through fasteners. A compensation slide rail is provided in the vertical direction of the fixing block. The side wall of the positioning frame facing away from the runner slides on the compensation slide rail through a compensation slider, and a compensation spring is provided at the bottom of the positioning frame.

[0010] Preferably, the material supporting mechanism includes a first connecting plate. At the upper end of one side of the first connecting plate, a fourth slide rail is fixedly installed. On the other side of the first connecting plate, a second runner is fixedly connected. A fourth slider is connected to the outer wall of the fourth slide rail. On one side of the fourth slider, a second connecting block is fixedly installed. In the middle of the outer wall of the first connecting plate, a second servo motor is fixedly installed. The end of the output shaft of the second servo motor is provided with a second lead screw. The second lead screw is threadedly connected to the second connecting block. On one side of the second connecting block, a second supporting wheel is movably connected. The second supporting wheel and the second runner are located on the same side.

[0011] Preferably, the bottom of the lower end of the first connecting plate is slidably connected to the second bracket through a fifth slider. A grating sensor is fixedly installed on the outer wall of the lower end of the first connecting plate. A drag chain mounting frame is fixedly connected to the outer wall of the grating sensor.

[0012] Preferably, the first brake and the second brake have the same structure, and both include a mounting member slidably mounted on one side, a first spring, a spring limiting plate, and a brake block provided at the bottom of the mounting member. A starting rod is provided on the other side of the mounting member. One end of the first spring is embedded inside the spring limiting plate, and the other end of the first spring away from the spring limiting plate is embedded in the mounting member. A first groove is provided at the bottom of the brake block, and friction blocks are provided on opposite sides of the first groove.

[0013] Preferably, the first dialing component and the second dialing component have the same structure, and both include a second connecting plate. Gears and push plates are respectively provided on two opposite surfaces of the second connecting plate. The push plate is driven by a cylinder to perform a lifting movement on the second connecting plate, and a second groove for engaging the starting rod is provided at the top of the push plate. The gear is driven by a third motor to engage with the rack on the first bracket or the second bracket.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention can simultaneously realize the fixed-length conveying of multiple U-shaped steel bars through several feeding mechanisms and several supporting mechanisms. Moreover, the first dialing component and the second dialing component can move the feeding mechanisms and the supporting mechanisms to designated positions according to production requirements, realizing the flexible variable torque of different spacings between multiple groups of feeding mechanisms and supporting mechanisms, thereby automatically adjusting the spacing between multiple groups of U-shaped steel bars, and finally performing stable transmission through the first clamping device and the second clamping device;

[0016] 2. The present utility model detects the rotation data of the runner through an encoder, thereby driving the transmission device to realize the fixed-length conveying of the steel bars. Moreover, the supporting wheel device can support the upper part of the U-shaped steel bar, and the lifting of the screw motor can be compatible with U-shaped steel bars with different widths of openings;

[0017] 3. The present invention adopts a pressing wheel device and a clamping component to clamp the lower part of the U-shaped steel bar to realize the stable conveying of the U-shaped steel bar. In addition, the special trajectory setting of the sliding groove on the pressing wheel device can realize the avoidance of the U-shaped steel bar after conveying. Secondly, the feeding mechanism is driven by an electric cylinder to rise and fall as a whole, and the U-shaped steel bar can be continuously conveyed to the next working station;

[0018] 4. The present invention is overall intelligent, reducing the labor cost while improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of the present invention;

[0020] Figure 2 is the connection schematic diagram of the electric cylinder and the load mounting plate in the present invention;

[0021] Figure 3 is the three-dimensional structural schematic diagram of the feeding mechanism of the present invention;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of another angle of the feeding mechanism of the present invention;

[0023] Figure 5 It is the front view of the feeding mechanism of the present invention;

[0024] Figure 6 It is the left view of the feeding mechanism of the present invention;

[0025] Figure 7 It is a three-dimensional schematic diagram of the pressure wheel device in the present invention;

[0026] Figure 8 It is the side view of the pressure wheel device in the present invention;

[0027] Figure 9 It is a connection schematic diagram of the supporting wheel and the rotary joint in the present invention;

[0028] Figure 10 It is a structural schematic diagram of the material supporting mechanism of the present invention;

[0029] Figure 11 It is a structural schematic diagram of the first brake of the present invention;

[0030] Figure 12 It is a connection schematic diagram of the feeding mechanism and the first dialing component of the present invention;

[0031] Figure 13 is Figure 12 the enlarged schematic diagram at position A in Detailed implementation manners

[0032] Next, the present invention will be described in detail in conjunction with Figure 1 - 13 to explain the present invention in detail. Here, the schematic embodiments of the present invention and the descriptions are used to explain the present invention, but not to limit the present invention.

[0033] A U-shaped steel bar multiple conveying machine, which includes a frame 21. On both sides of the top of the frame, there are fixed substrates 22. On the substrates, there are linear bearings 30 and electric cylinders 23. A guide rod shaft 28 is sleeved inside the linear bearing. The top of the electric cylinder is provided with a first servo motor. The output shafts of the guide rod shaft and the electric cylinder both pass through the substrate and are connected to a load mounting plate 31. The load mounting plate is arranged on a first bracket 24. On the first bracket, there are several sliding feeding mechanisms 26. Between the frames, there is at least one second bracket 25 parallel to the first bracket. On the second bracket, there are several material supporting mechanisms 27. One end of each feeding mechanism is slidably installed with a first holder 8 that holds tightly to the first bracket. One end of each material supporting mechanism is slidably installed with a second holder 32 that holds tightly to the second bracket. Several feeding mechanisms all drive the first holder to move through a first dialing component to realize the pitch adjustment on the first bracket. Several material supporting mechanisms all drive the second holder to move through a second dialing component to realize the pitch adjustment on the second bracket. The first brake and the second brake have the same structure, and both include a mounting part 801 slidably installed on one side, a first spring 802, a spring limiting plate 803, and a brake block 804 arranged at the bottom of the mounting part. On the other side of the mounting part, there is a starting rod 805. One end of the first spring is embedded inside the spring limiting plate, and the other end of the first spring away from the spring limiting plate is embedded in the mounting part. The bottom of the brake block is provided with a first groove 806. On both opposite sides of the first groove, there are friction blocks 807. The first dialing component and the second dialing component have the same structure, and both include a second connecting plate 1101. On the two opposite sides of the second connecting plate, there are respectively a gear and a push plate 1102. The push plate is driven by a cylinder 1103 to perform a lifting movement on the second connecting plate, and a second groove 1104 for engaging the starting rod is opened at the top of the push plate. The gear is driven by a third motor 1106 to engage with a rack 1105 on the first bracket or the second bracket. When it is necessary to change the pitch between the feeding mechanisms, the first dialing component runs to the feeding mechanism that needs to be moved. The cylinder drives the push plate to extend, opening the first brake. At this time, the feeding mechanism is in a separated state from the first bracket. The first dialing component moves the entire feeding mechanism to the designated position. The cylinder retracts, and the first brake descends to automatically hold the feeding mechanism tightly to the first bracket. Thus, the displacement of one feeder is completed. The other feeding mechanisms are moved to the designated positions in sequence to realize the flexible pitch adjustment function. Similarly, the material supporting mechanism is assisted by the second dialing component and the second brake to perform flexible pitch adjustment on the second bracket. This device can install 16 feeding mechanisms for conveying at the same time, and these 16 feeding mechanisms can be lifted simultaneously.

[0034] The feeding mechanism includes a feeding body, a pressing wheel device 3, a supporting wheel device, and a feeding motor 10. The feeding body includes a bottom plate and supporting plates 1 and 2 oppositely arranged on the bottom plate. The gap between the supporting plate 1 and the supporting plate 2 forms a steel bar accommodating cavity. A transmission device 4 for U-shaped steel bar conveying is provided at the lower part of the feeding body. The transmission device includes a chain plate line and a transmission component. The feeding motor drives the transmission component to move, and the movement of the transmission component drives the chain plate line to convey. An encoding component 6 is provided on one side of the transmission device. The encoding component includes an encoder 601 and a first runner 602 connected to the encoder shaft. The first runner is arranged in the steel bar accommodating cavity and is fixed to the feeding body through a fixing device. The first runner is used to support the lower part of the U-shaped steel bar. At least one set of clamping components 7 is also provided on the feeding body. Each clamping component includes oppositely arranged clamping blocks 701 and clamping cylinders 702. The telescopic movement of the clamping cylinder causes the clamping blocks to clamp the lower part of the U-shaped steel bar. An installation groove is provided above the transmission device on the supporting plate 1. The pressing wheel device is arranged in the installation groove and is used to press the lower part of the U-shaped steel bar. The supporting wheel device is arranged on the supporting plate 2 and is used to support the upper part of the U-shaped steel bar. The lower part of the U-shaped steel bar clamped by the clamping blocks is horizontally placed on the chain plate line and the first runner. The rotation data of the first runner is detected by the encoder, so as to drive the transmission device to realize fixed-length conveying of the steel bar. And the supporting wheel device can lift the upper part of the U-shaped steel bar, and the lifting of the screw motor can be compatible with U-shaped steel bars with different widths of openings.

[0035] The supporting wheel device further includes a first slide rail 902 arranged on the outer wall of the supporting plate 1. A first slider is slidably connected to the first slide rail. A first connecting block 903 is fixedly installed on one side of the first slider. A screw motor 906 is arranged at the bottom end of the first slide rail on the outer wall of the supporting plate 1. A first screw rod 901 is installed at the end of the output shaft of the screw motor. The first screw rod is threadedly connected to the first connecting block. A first tension spring support and a second tension spring support are oppositely arranged on one side of the first connecting block. A tension spring 905 parallel to the first slide rail is arranged between the first tension spring support and the second tension spring support. A rotary joint 904 is sleeved on the first tension spring support. The other end of the rotary joint passes through the supporting wheel groove and is connected to a first supporting wheel 908 in the steel bar accommodating cavity. The rotary joint slides on a sliding block 910 connected to the first connecting block. The initial tension of the tension spring ensures that the first supporting wheel can horizontally lift the upper part of the U-shaped steel bar. When the U-shaped steel bar needs to be moved out to the next working station after being conveyed to the designated position, the whole U-shaped steel bar rises. Thus, the lower part of the U-shaped steel bar pushes against the first supporting wheel to drive the rotary joint to rotate upward along the sliding block until it rotates 90°. After that, the whole U-shaped steel bar can move to the next working station without obstacle. At this time, under the action of its own tension, the tension spring drives the rotary joint to slide downward along the sliding block, thereby driving the first supporting wheel to reset.

[0036] The pressing wheel device includes a support base 306 connected to the inner bottom of the placement groove and a pressing wheel cylinder 301 provided on the support base. Both the pressing wheel cylinder and the clamping cylinder are operated through a solenoid valve 5. Inside the support base, a base 303, a cam follower mounting plate 305, and a pressing wheel mounting block are sequentially arranged from top to bottom. At least one pressing wheel 302 is provided on the pressing wheel mounting block. Corresponding sliding grooves 307 are provided on opposite sides of the support base. Both sides of the base are connected to the support base through second sliding components, and the sliding direction of the second sliding components is the same as the telescopic direction of the pressing wheel cylinder. The bottom of the base is connected to a moving block 304 connecting the cam follower mounting plate through a third sliding component. The movement of the pressing wheel cylinder drives the cam follower 310 on the cam follower mounting plate to move along the sliding groove. The sliding groove includes an inclined linear sliding groove section A 309 and a linear sliding groove section B 312. The head end of the sliding groove section A is the highest point 308 of the pressing wheel, and the point where the tail end of the sliding groove section A is connected to the head end of the sliding groove section B is the pressing wheel avoidance point 311. The tail end of the sliding groove section B is the lowest point 313 of the pressing wheel. While the pressing wheel cylinder drives the base to rise and fall, the movement of the cam follower in the sliding groove section A drives the pressing wheel to move horizontally forward and backward along with the third sliding component, and the movement of the sliding groove section B drives the pressing wheel to move up and down, so as to drive the pressing wheel to press and avoid the lower part of the U-shaped steel bar in the steel bar accommodation cavity. The height of the pressing wheel avoidance point is the maximum diameter of the lower part of the U-shaped steel bar plus a certain margin, and the height of the lowest point of the pressing wheel matches the minimum diameter of the lower part of the U-shaped steel bar. By setting the pressing wheel avoidance point and the lowest point of the pressing wheel, U-shaped steel bars with different diameters can be pressed, and when the cam follower reaches the highest point of the pressing wheel, it is ensured that the pressing wheel is in a retracted state, which is convenient for avoiding the U-shaped steel bar.

[0037] The fixing device includes a fixing block and a positioning frame provided in the steel bar accommodation cavity. The first runner is installed in the positioning frame. The shaft of the encoder passes through the positioning frame and is connected to the first runner shaft. The fixing block and the feeding body are fixed through fasteners. A compensation slide rail is provided in the vertical direction of the fixing block. The side wall of the positioning frame facing away from the runner slides on the compensation slide rail through a compensation slider, and a compensation spring is provided at the bottom of the positioning frame. Because the first runner will have a certain up and down floating during the actual operation process, the compensation spring always gives an upward force to press the coding component upward, and then the force of the compensation spring is used to support the sliding of the compensation slider on the compensation slide rail, so as to ensure that the first runner is always in contact with the lower part of the U-shaped steel bar.

[0038] The material supporting mechanism includes a first connecting plate 2701. At the upper end of one side of the first connecting plate, a fourth slide rail 2702 is fixedly installed. On the other side of the first connecting plate, a second runner 2703 is fixedly connected. The outer wall of the fourth slide rail is connected with a fourth slider 2704. On one side of the fourth slider, a second connecting block 2705 is fixedly installed. In the middle of the outer wall of the first connecting plate, a second servo motor 2706 is fixedly installed. At the end of the output shaft of the second servo motor, a second lead screw 2708 is installed. The second lead screw is threadedly connected with the second connecting block. On one side of the second connecting block, a second supporting wheel 2709 is movably connected. The second supporting wheel and the second runner are on the same side. The second supporting wheel is used to support the upper part of the U-shaped steel bar, and the second runner is used to support the lower part of the U-shaped steel bar. The bottom of the lower end of the first connecting plate is slidably connected to the second bracket through a fifth slider 2710. A grating sensor 2711 is fixedly installed on the outer wall of the lower end of the first connecting plate. A drag chain mounting bracket 2712 is fixedly connected to the outer wall of the grating sensor. The position of the material supporting mechanism can be detected in real time through the grating sensor.

[0039] During the implementation process, the electric cylinder rises, driving the entire feeding mechanism to rise, and then drives each feeding mechanism to move to the specified position through the first encoder, and realizes clamping through the first clamping device. The supporting mechanism is also driven by the second encoder to move to the position relative to each feeding mechanism and stop, and realizes clamping through the second clamping device, and then the clamping block of the clamping assembly is opened, the pressing wheel on the pressing wheel device retracts, the first supporting wheel on the supporting wheel device is lifted and lowered to the specified position, and the second supporting wheel on the supporting mechanism is lifted and lowered to the same position corresponding to the first supporting wheel. The manipulator inserts the U-shaped steel bar into the steel bar accommodating cavity of the feeding body from the side. At this time, the upper part of the U-shaped steel bar is lifted by the first supporting wheel and the second supporting wheel, and the step by step of the U-shaped steel bar is lifted by the second rotating wheel. The clamping block clamps the lower part of the U-shaped steel bar under the movement of the clamping cylinder, and the pressing wheel device moves with the pressing wheel cylinder, driving the pressing wheel to extend and press down to clamp the lower part of the U-shaped steel bar. The pressing wheel cylinder and the clamping cylinder are both controlled by the solenoid valve. When the steel bar conveying signal is received, the transmission component operates under the drive of the feeding motor, and drives the U-shaped steel bar forward through the chain plate line. The advancement of the U-shaped steel bar drives the first rotating wheel to rotate. At the same time, the encoder detects the rotation data of the first rotating wheel. After reaching the specified conveying length, the conveying is stopped, thereby realizing the stable fixed-length conveying of the U-shaped steel bar. When the U-shaped steel bar is conveyed and the processing of this station is completed and it needs to be moved to the next station, the clamping block of the clamping component is opened again, the pressure wheel retracts, and the electric cylinder drives the entire feeding mechanism to descend. Since the supporting mechanism is still holding the U-shaped steel bar, the lower part of the U-shaped steel bar in the steel bar accommodating cavity pushes the first supporting wheel to drive the rotating joint to rotate upward along the sliding block. After rotating 90°, the U-shaped steel bar is completely separated from the feeding mechanism and the electric cylinder also stops moving. At this time, the tension spring, under the action of its own tension, drives the rotating joint to slide downward along the sliding block, thereby driving the first supporting wheel to reset, and finally the U-shaped steel bar can be moved to the next station by the manipulator.

[0040] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A plurality of conveying machines for U-shaped steel bars, characterized in that: It includes a frame (21), on both sides of the top of the frame are fixedly provided with base plates (22), on the base plates are provided linear bearings (30) and electric cylinders (23), a guide rod shaft (28) is sleeved in the linear bearing, the top of the electric cylinder is provided with a first servo motor, the output shafts of the guide rod shaft and the electric cylinder both pass through the base plate and are connected to a load mounting plate (31), the load mounting plate is arranged on a first bracket (24), on the first bracket are provided several sliding feeding mechanisms (26), between the frames is also provided at least one second bracket (25) parallel to the first bracket, on the second bracket are provided several material supporting mechanisms (27), at one end of each feeding mechanism is slidably installed a first clamp (8) that clamps on the first bracket, at one end of each material supporting mechanism is slidably installed a second clamp (32) that clamps on the second bracket, several feeding mechanisms all drive the first clamp to move through a first dialing component to realize the pitch adjustment on the first bracket, several material supporting mechanisms all drive the second clamp to move through a second dialing component to realize the pitch adjustment on the second bracket; The feeding mechanism includes a feeding body, a supporting wheel device and a feeding motor (10), the feeding body includes a bottom plate and opposite first support plates (1) and second support plates (2) on the bottom plate, and the gap between the first support plate and the second support plate forms a steel bar accommodating cavity; The supporting wheel device further includes a first slide rail (902) arranged on the outer wall of the first support plate, a first slider is slidably connected on the first slide rail, one side of the first slider is fixedly installed with a first connecting block (903), at the bottom end of the first slide rail on the outer wall of the first support plate is provided a screw motor (906), the end of the output shaft of the screw motor is installed with a first screw rod (901), the first screw rod is threadedly connected with the first connecting block, on one side of the first connecting block are relatively provided a first tension spring support and a second tension spring support, between the first tension spring support and the second tension spring support is provided a tension spring (905) parallel to the first slide rail, a rotary joint (904) is sleeved on the first tension spring support, the other end of the rotary joint passes through a supporting wheel groove and is connected to a first supporting wheel (908) in the steel bar accommodating cavity, the rotary joint slides on a sliding block (910) connected to the first connecting block, thereby driving the first supporting wheel to rotate by 90°, and driving the first supporting wheel to reset through the tension spring; The first clamp and the second clamp have the same structure, and both include a mounting part (801) slidably installed on one side, a first spring (802), a spring limiting plate (803) and a brake block (804) arranged at the bottom of the mounting part, on the other side of the mounting part is provided a starting rod (805), one end of the first spring is embedded inside the spring limiting plate, the other end of the first spring away from the spring limiting plate is embedded in the mounting part, the bottom of the brake block is provided with a first groove (806), and friction blocks (807) are arranged on both opposite sides of the first groove; The first and second dials have the same structure, each including a second connecting plate (1101). On the two opposite sides of the second connecting plate, a gear and a push plate (1102) are respectively provided. The push plate is driven by a cylinder (1103) to move up and down on the second connecting plate, and a second groove (1104) for engaging the starting rod is formed at the top of the push plate. The gear is driven by a third motor (1106) to engage with a rack (1105) on the first bracket or the second bracket.

2. The U-shaped steel bar multiple conveying machine according to claim 1, characterized in that: A transmission device (4) for conveying U-shaped steel bars is provided at the lower part of the feeding body. The transmission device includes a chain plate line and a transmission component. The feeding motor drives the transmission component to move, and the movement of the transmission component drives the chain plate line to convey. An encoding component (6) is provided on one side of the transmission device. The encoding component includes an encoder (601) and a first runner (602) connected to the encoder shaft. The first runner is arranged in the steel bar accommodating cavity and is fixed to the feeding body through a fixing device. The first runner is used to support the lower part of the U-shaped steel bar. At least one clamping component (7) is further provided on the feeding body. Each clamping component includes clamping blocks (701) and clamping cylinders (702) arranged oppositely. The telescopic movement of the clamping cylinder causes the clamping blocks to clamp the lower part of the U-shaped steel bar. An installation groove is provided above the transmission device on the first support plate. The supporting wheel device is arranged on the second support plate and is used to support the upper part of the U-shaped steel bar. The lower part of the U-shaped steel bar clamped by the clamping blocks is horizontally placed on the chain plate line and the first runner.

3. The U-shaped steel bar multiple conveying machine according to claim 2, characterized in that: The feeding mechanism further includes a pressing wheel device (3). The pressing wheel device includes a support base (306) connected to the bottom of the installation groove and a pressing wheel cylinder (301) arranged on the support base. The pressing wheel cylinder and the clamping cylinder are both operated through a solenoid valve (5). A base (303), a cam follower mounting plate (305) and a pressing wheel mounting block are sequentially arranged in the support base from top to bottom. At least one pressing wheel (302) is provided on the pressing wheel mounting block. A corresponding sliding groove (307) is provided on the opposite side of the support base. Both sides of the base are connected to the support base through a second sliding component. The sliding direction of the second sliding component is the same as the telescopic direction of the pressing wheel cylinder. The bottom of the base is connected to a moving block (304) for connecting the cam follower mounting plate through a third sliding component. The movement of the pressing wheel cylinder drives the cam follower (310) on the cam follower mounting plate to move along the sliding groove. The movement of the cam follower drives the moving block to move horizontally back and forth along the third sliding component, so as to drive the pressing wheel to press and avoid the lower part of the U-shaped steel bar in the steel bar accommodating cavity. The pressing wheel device is arranged in the installation groove and is used to press the lower part of the U-shaped steel bar.

4. The U-shaped steel bar multiple conveying machine according to claim 3, characterized in that: The slide groove comprises an oblique slide groove section A (309) and a straight slide groove section B (312); the head end of the slide groove section A is the highest point of the pressure wheel (308); the point where the tail end of the slide groove section A is connected to the head end of the slide groove section B is the pressure wheel avoidance point (311); the tail end of the slide groove section B is the lowest point of the pressure wheel (313); the cam follower drives the pressure wheel to move horizontally in the slide groove section A through the movement of the pressure wheel cylinder; and the cam follower drives the pressure wheel to move vertically in the slide groove section B through the movement of the pressure wheel cylinder.

5. According to claim 2, a plurality of U-shaped steel bar conveying machines, Features: The fixing device includes a fixing block and a positioning frame arranged in the steel bar accommodating cavity, the first rotating wheel is installed in the positioning frame, the axis of the encoder passes through the positioning frame and is connected to the first rotating wheel axis, the fixing block is fixed to the feeding body by fasteners, a compensating slide rail is provided in the vertical direction of the fixing block, the side wall of the positioning frame away from the rotating wheel slides on the compensating slide rail through the compensating slider, and a compensating spring is provided at the bottom of the positioning frame.

6. According to claim 1, a plurality of U-shaped steel bar conveying machines, Features: The material supporting mechanism comprises a first connecting plate (2701), a fourth slide rail (2702) is fixedly mounted on the upper end of one side of the first connecting plate, a second rotating wheel (2703) is fixedly connected to the other side of the first connecting plate, a fourth slider (2704) is connected to the outer wall of the fourth slide rail, a second connecting block (2705) is fixedly mounted on one side of the fourth slider, a second servo motor (2706) is fixedly mounted on the middle end of the outer wall of the first connecting plate, a second screw rod (2708) is mounted on the end of the output shaft of the second servo motor, the second screw rod is threadedly connected to the second connecting block, a second supporting wheel (2709) is movably connected to one side of the second connecting block, and the second supporting wheel and the second rotating wheel are located on the same side.

7. The U-shaped steel bar multiple conveying machine according to claim 6, Features: The bottom of the lower end of the first connecting plate is slidably connected to the second bracket via a fifth sliding block (2710); a grating sensor (2711) is fixedly mounted on the outer wall of the lower end of the first connecting plate; and a support chain mounting frame (2712) is fixedly connected to the outer wall of the grating sensor.

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