House building steel bar bending device

Abstract

The invention relates to a bending device, in particular to a house building steel bar bending device. According to the house building steel bar bending device, positioning can be conducted according to the bending length of steel bar placement, and the bending accuracy is improved. A house building steel bar bending device comprises a bearing plate, supporting frames, positioning columns and the like, the supporting frames are fixedly connected to the front side and the rear side of the bottom of the bearing plate in a bilateral symmetry mode, and the positioning columns used for guiding steel bars are fixedly connected to the circle center position of the rear side of the top of the bearing plate. According to the device, a stress wheel is twisted to rotate forwards and backwards alternately, so that a positioning plate moves forwards and backwards to reach the required bending length of a reinforcing steel bar, then the reinforcing steel bar is placed on a bearing plate, a second motor is started to rotate forwards, a contraction plate moves leftwards to clamp and fix the reinforcing steel bar, and then a first motor is started to drive a bending rod to rotate backwards through an elastic expansion plate; and the bending rod rotates reversely to bend the positioned reinforcing steel bar, and the bending length of the reinforcing steel bar can be positioned under the action of the positioning plate, so that the bending accuracy is improved.

Description

Technical Field

[0001] The invention relates to a bending device, in particular to a steel bar bending device for building construction. Background Art

[0002] In house construction, a variety of different materials are needed, and the use of steel bars is indispensable. Steel bars can form a steel bar skeleton, so the steel bars need to be bent and then used later.

[0003] A Chinese patent with publication number CN210412290U discloses a construction steel bar bending device, including a horizontally arranged workbench, a mounting seat is provided on the workbench, a horizontally arranged hydraulic cylinder is fixed on one side of the mounting seat, a bending head is provided on the piston rod of the hydraulic cylinder, a placing table is provided on the side of the workbench opposite to the bending head, a positioning plate connected to the workbench is fixed on the side of the placing table away from the bending head, an adjusting groove is provided on the workbench along a direction perpendicular to the hydraulic cylinder, two positioning rods perpendicular to the workbench are provided on the adjusting groove, the two positioning rods are symmetrically arranged on both sides of the placing table, and slide along the adjusting groove through a driving device. Although the above patent can bend steel bars, it is difficult to accurately control the length of the bent steel bars because the steel bars need to be placed manually each time, which affects the accuracy of the bending.

[0004] The present invention aims to solve the problems existing in the above-mentioned patents. To this end, a building construction steel bar bending device is proposed, which can locate the bending length of the steel bar and improve the bending accuracy. Summary of the invention

[0005] In order to overcome the disadvantage that although the above patent can bend steel bars, it is difficult to accurately control the bending length of the steel bars because the steel bars need to be placed manually each time, which affects the bending accuracy, the present invention provides a steel bar bending device for building construction that can locate the bending length of the placed steel bars and improve the bending accuracy.

[0006] The present invention is achieved through the following technical approaches: A steel bar bending device for building construction comprises a bearing plate, a support frame, a positioning column, a first motor, an elastic telescopic plate and a bending rod, wherein the support frames are fixedly connected to the front and rear sides of the bottom of the bearing plate symmetrically, a positioning column for guiding the steel bar is fixedly connected to the center position of the rear side of the top of the bearing plate, an arc groove is opened on the rear side of the bearing plate, a first motor is fixedly connected to the center position of the rear side of the bottom of the bearing plate, an elastic telescopic plate is fixedly connected to the output shaft of the first motor, a bending rod for bending the steel bar is fixedly connected to the right end of the elastic telescopic plate, and the bending rod is located in the arc groove of the bearing plate, and also comprises a positioning mechanism and a clamping mechanism, a positioning mechanism for positioning the bending length of the steel bar is arranged on the rear side of the bearing plate, and a clamping mechanism for clamping and fixing the steel bar is arranged on the front side of the bearing plate.

[0007] Further explanation, the positioning mechanism includes a positioning plate, a threaded frame, a force-bearing wheel and an internal threaded tube. A threaded frame is fixedly connected to the middle of the rear bottom of the load-bearing plate. A positioning plate for positioning the bending length of the steel bar is slidably mounted between the left and right sides of the threaded frame. An internal threaded tube is symmetrically connected to the inner side of the lower part of the positioning plate. The internal threaded tube is threadedly connected to the threaded frame. A force-bearing wheel is rotatably connected to the middle of the lower part of the positioning plate. The front side of the force-bearing wheel and the outer sides of the internal threaded tubes on the left and right sides are driven by a synchronous belt assembly.

[0008] Further explanation, the clamping mechanism includes a fixed plate, a retractable plate, a screw rod and a second motor. A fixed plate is fixedly connected to the left front portion of the load-bearing plate, and a retractable plate for clamping and fixing the steel bars is slidably connected to the right front portion of the load-bearing plate. The retractable plate corresponds to the fixed plate, and a screw rod for driving the retractable plate to move is rotatably connected to the front portion of the load-bearing plate. The screw rod is threadedly connected to the middle portion of the retractable plate, and a second motor is fixedly connected to the front side of the right side of the load-bearing plate, and the output shaft of the second motor is fixedly connected to the right end of the screw rod.

[0009] According to a further description, a locking mechanism is also included for compacting and fixing the steel bars.

[0010] Further explanation, the locking mechanism includes a guide rail, a guide plate, a locking rod, a trigger frame, a buffer tube, a buffer rod, a first spring and a second spring. The lower right part of the bending rod is slidably connected to the trigger frame, two second springs are connected between the left side of the bottom of the trigger frame and the inner side of the bending rod, the middle part of the bending rod is slidably connected to the buffer tube, the lower part of the buffer tube is fixedly connected to the middle part of the left side of the trigger frame, the inside of the buffer tube is slidably connected to the buffer rod, the lower part of the buffer rod is connected to the upper part of the inner side of the buffer tube, and the first spring is connected between the lower part of the buffer rod and the upper part of the inner side of the buffer tube, the top of the buffer rod is fixedly connected to a locking rod for pressing and limiting the steel bar, the right rear side of the top of the load-bearing plate is fixedly connected to the guide plate, the guide plate is slidably connected to the right side of the locking rod, the rear side of the bottom of the load-bearing plate is fixedly connected to a guide rail for driving the trigger frame to move downward, and the front parts of the left and right sides of the guide rail are inclined.

[0011] According to a further description, a contraction mechanism is also included for bringing the bending rod into close contact with the steel bar.

[0012] To further explain, the retraction mechanism includes a single-rod piston cylinder, a diverter pipe, a sleeve, a conical frame, a universal seat and a piston rod. The bottom end of the bending rod is rotatably connected to the universal seat. Three sleeves are evenly spaced and fixedly connected to the bottom of the supporting plate. The inner sides of the three sleeves are slidably connected to the piston rods. A conical frame for driving the universal seat to move inward is fixedly connected between the bottom ends of the three piston rods. The inner side of the conical frame is in contact with the universal seat. A single-rod piston cylinder is fixedly connected to the left front side of the bottom of the supporting plate. The left side of the single-rod piston cylinder is connected to the diverter pipe. The tail end of the diverter pipe is fixedly connected and connected to the lower front part of the three single-rod piston cylinders. The right end of the piston rod of the single-rod piston cylinder is fixedly connected to the left side of the retraction plate.

[0013] Further description, it also includes a buffer plate and a third spring. The buffer plate for buffering the steel bars is slidably connected to the upper rear side of the positioning plate, and the third spring is symmetrically connected between the front side of the buffer plate and the upper rear side of the positioning plate.

[0014] Further description, it also includes auxiliary wheels, and four auxiliary wheels for guiding the steel bars are rotatably connected at even intervals on the front side of the top of the load-bearing plate.

[0015] According to a further description, a grip rod is also provided, and an eccentric position of the rear side of the force-bearing wheel is fixedly connected to the grip rod.

[0016] The present invention has significant improvements in that: 1. First, twist the force wheel to rotate alternately forward and backward, so that the positioning plate moves forward and backward to the length of the steel bar that needs to be bent, then place the steel bar on the load-bearing plate, start the second motor to rotate forward, so that the contraction plate moves to the left to clamp the steel bar, and then start the first motor to drive the bending rod to reverse through the elastic telescopic plate. The bending rod reverses to bend the positioned steel bar. Through the role of the positioning plate, the bending length of the steel bar can be positioned, thereby improving the accuracy of the bending.

[0017] 2. Under the action of the locking mechanism, whenever the bending rod is reversed, the locking mechanism can press and fix the steel bar, which can prevent the steel bar from moving upward during the bending process and affecting the bending effect, thereby improving the bending effect of the steel bar.

[0018] 3. Under the action of the contraction mechanism, whenever the contraction plate moves to the left to clamp the steel bar, the contraction mechanism can drive the bending rod to move to the left to contact the steel bar, which can prevent the bending rod from having an interval with steel bars of different thicknesses that affects the bending, thereby ensuring that the bending rod can effectively bend steel bars of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the positioning mechanism and the clamping mechanism of the present invention.

[0021] Figure 3 It is a partial three-dimensional structural schematic diagram of the bending rod of the present invention.

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the positioning mechanism of the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the clamping mechanism of the present invention.

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the locking mechanism and the retracting mechanism of the present invention.

[0025] Figure 7 It is a partial three-dimensional structural schematic diagram of the locking mechanism of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the locking rod of the present invention.

[0027] Fig. 9 It is a partial three-dimensional structural schematic diagram of the contraction mechanism of the present invention.

[0028] Fig.10 It is a schematic diagram of the three-dimensional structure of the conical frame of the present invention.

[0029] Fig.11 It is a schematic diagram of the three-dimensional structure of the buffer plate of the present invention.

[0030] Fig.12 It is a schematic diagram of the three-dimensional structure of the auxiliary wheel of the present invention.

[0031] Figure numbers: 1_carrying plate, 2_support frame, 3_positioning column, 4_first motor, 5_elastic telescopic plate, 6_bending rod, 7_positioning mechanism, 71_positioning plate, 72_threaded frame, 73_force wheel, 74_inner threaded tube, 75_grip rod, 8_clamping mechanism, 81_fixing plate, 82_contraction plate, 83_screw rod, 84_second motor, 9_locking mechanism, 91_guide rail, 92_guide plate, 93_locking rod, 94_trigger frame, 95_buffer tube, 96_buffer rod, 97_first spring, 98_second spring, 10_contraction mechanism, 101_single-rod piston cylinder, 102_shunt tube, 103_sleeve, 104_conical frame, 105_universal seat, 106_piston rod, 11_buffer plate, 12_third spring, 13_auxiliary wheel. DETAILED DESCRIPTION

[0032] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position. Example 1

[0033] A steel bar bending device for building construction includes a bearing plate 1, a support frame 2, a positioning column 3, a first motor 4, an elastic telescopic plate 5, a bending rod 6, a positioning mechanism 7 and a clamping mechanism 8, see Figure 1-Figure 5As shown, support frames 2 are symmetrically fixed on both the front and rear sides of the bottom of the load-bearing plate 1, a positioning column 3 is installed at the center position of the rear side of the top of the load-bearing plate 1 by bolt connection, and the positioning column 3 can guide the steel bar, and an arc groove is opened on the rear side of the load-bearing plate 1, and a first motor 4 is fixed at the center position of the rear side of the bottom of the load-bearing plate 1, and an elastic telescopic plate 5 is fixed on the output shaft of the first motor 4, and a bending rod 6 is fixedly connected to the right end of the elastic telescopic plate 5. When the bending rod 6 is reversed, the bending rod 6 can bend the steel bar. The bending rod 6 is located in the arc groove of the load-bearing plate 1, and a positioning mechanism 7 is provided on the rear side of the load-bearing plate 1. When the positioning mechanism 7 is operated, the positioning mechanism 7 can position the length of the bent steel bar. A clamping mechanism 8 is provided on the front side of the load-bearing plate 1. When the clamping mechanism 8 is operated, the clamping mechanism 8 can clamp and fix the steel bar.

[0034] The positioning mechanism 7 includes a positioning plate 71, a threaded frame 72, a force wheel 73, an internal threaded tube 74 and a gripping rod 75, see Figure 2 and Figure 4 As shown, a threaded frame 72 is installed in the middle of the bottom rear side of the load-bearing plate 1 by bolt connection, and a positioning plate 71 is slidably mounted between the left and right sides of the threaded frame 72. When the steel bar contacts the positioning plate 71, the positioning plate 71 can realize the positioning of the bending length of the steel bar. The inner side of the lower part of the positioning plate 71 is symmetrically connected to the left and right rotation of an internal threaded tube 74, and the internal threaded tube 74 is threadedly connected to the threaded frame 72. A force-bearing wheel 73 is rotatably connected to the middle of the lower part of the positioning plate 71. The front side of the force-bearing wheel 73 and the outer sides of the internal threaded tubes 74 on the left and right sides are driven by a synchronous belt assembly, and a grip rod 75 is installed at the eccentric position of the rear side of the force-bearing wheel 73 by welding.

[0035] The clamping mechanism 8 includes a fixing plate 81, a contraction plate 82, a screw rod 83 and a second motor 84. Figure 2 and Figure 5 As shown, a fixed plate 81 is fixedly connected to the left front portion of the load-bearing plate 1, and a retractable plate 82 is slidably connected to the right front portion of the load-bearing plate 1. The retractable plate 82 corresponds to the fixed plate 81. When the retractable plate 82 moves to the left, the retractable plate 82 can clamp and fix the steel bars. A screw rod 83 is rotatably connected to the front portion of the load-bearing plate 1. The screw rod 83 is threadedly connected to the middle portion of the retractable plate 82. When the screw rod 83 rotates, the screw rod 83 can drive the retractable plate 82 to move. A second motor 84 is installed on the front side of the right side of the load-bearing plate 1 by bolt connection, and the output shaft of the second motor 84 is fixedly connected to the right end of the screw rod 83.

[0036] The locking cam 74 is then engaged with the locking cam 76 and the locking cam 77 is engaged, and the locking cam 76 is engaged, and the locking cam 76 is engaged, and the locking cam 77 is engaged, and the locking cam 77 is engaged, and the locking cam 77 is engaged, and the locking cam 77 is engaged, and the locking cam 77 is engaged, and the locking cam 77 is engaged, and the locking cam 77 is engaged, and the locking cam 77 is engaged, and the locking cam 77 is engaged, and the locking cam 77 is engaged, and the locking cam 77 is engaged, and the locking cam 77 is engaged, and the locking cam 77 is engaged, and the locking cam 77 is engaged, and the locking cam 77 is engaged, and the locking cam 77 is engaged 2 moves to the left, when the shrink plate 82 moves to the left and contacts the steel bar, the shrink plate 82 clamps and fixes the steel bar through the fixing plate 81, and the steel bar contacts the positioning column 3, the second motor 84 is turned off, the screw rod 83 stops driving the shrink plate 82 to move to the left, and then the first motor 4 is started to reverse and drive the elastic expansion plate 5 to reverse, the elastic expansion plate 5 reverses and drives the bending rod 6 to reverse, the bending rod 6 reverses and bends the steel bar through the positioning column 3, when the steel bar is bent to the required angle, the first motor 4 is started to drive the elastic expansion plate 5 to rotate forward and reset, the elastic expansion plate 5 forwards and resets to drive the bending rod 6 to rotate forward and reset, the bending rod 6 resets and disengages from the steel bar, and then the second motor 84 is started to drive the screw rod 83 to reverse, the screw rod 83 reverses and drives the shrink plate 82 to move rightward and reset, the shrink plate 82 resets and disengages from the steel bar, and then the bent steel bar is removed, and this is repeated, and the steel bar can be continuously bent. In this way, through the function of the positioning plate 71, the bending length of the steel bar can be positioned, thereby improving the accuracy of the bending. Example 2

[0037] On the basis of embodiment 1, a locking mechanism 9 is also included. The locking mechanism 9 includes a guide rail 91, a guide plate 92, a locking rod 93, a trigger frame 94, a buffer tube 95, a buffer rod 96, a first spring 97 and a second spring 98. Figure 6-Figure 8As shown, a trigger frame 94 is slidably connected to the lower right side of the bending rod 6, two second springs 98 are connected between the bottom left side of the trigger frame 94 and the inner side of the bending rod 6, a buffer tube 95 is slidably connected to the middle part of the bending rod 6, the lower part of the buffer tube 95 is installed with the middle part of the left side of the trigger frame 94 by welding, a buffer rod 96 is slidably connected to the inner side of the buffer tube 95, a first spring 97 is connected between the lower part of the buffer rod 96 and the upper part of the inner side of the buffer tube 95, a locking rod 93 is fixedly connected to the top of the buffer rod 96, and when the locking rod 93 moves downward, the locking rod 93 can realize the steel bar compression and limiting, a guide plate 92 is installed on the right rear side of the top of the load-bearing plate 1 by welding, the guide plate 92 is slidably connected to the right side of the locking rod 93, and a guide rail 91 is fixedly connected to the rear side of the bottom of the load-bearing plate 1, and the front parts of the left and right sides of the guide rail 91 are inclined surfaces. When the trigger frame 94 is reversed and contacts the guide rail 91, the guide rail 91 can drive the trigger frame 94 to move downward.

[0038] The invention also includes a contraction mechanism 10, which includes a single-rod piston cylinder 101, a shunt pipe 102, a sleeve 103, a conical frame 104, a universal seat 105 and a piston rod 106. Figure 6 , Fig. 9 and Fig.10 As shown, the bottom end of the bending rod 6 is rotatably connected to a universal seat 105, and three sleeves 103 are installed at even intervals on the bottom of the supporting plate 1 by welding. The inner sides of the three sleeves 103 are slidably connected to piston rods 106, and a conical frame 104 is fixed between the bottom ends of the three piston rods 106. The inner side of the conical frame 104 is in contact with the universal seat 105. When the conical frame 104 moves upward, the conical frame 104 can drive the universal seat 105 to move inward. A single-rod piston cylinder 101 is installed on the left front side of the bottom of the supporting plate 1 by welding. The left side of the single-rod piston cylinder 101 is connected to a shunt pipe 102, and the tail end of the shunt pipe 102 is fixedly connected and connected to the lower front parts of the three single-rod piston cylinders 101, and the right end of the piston rod 106 of the single-rod piston cylinder 101 is fixedly connected to the left side of the contraction plate 82.

[0039] When the steel bar is clamped, the first motor 4 is started to drive the bending rod 6 to reverse through the elastic telescopic plate 5, and the bending rod 6 reverses and drives the trigger frame 94 to reverse. When the trigger frame 94 reverses and contacts the inclined surface of the guide rail 91, the guide rail 91 drives the trigger frame 94 to move downward, and the second spring 98 is compressed. The trigger frame 94 moves downward and drives the buffer tube 95 to move downward. The buffer tube 95 moves downward and drives the buffer rod 96 to move downward through the first spring 97. The buffer rod 96 moves downward and drives the locking rod 93 to move downward. When the locking rod 93 moves downward and contacts the steel bar, the locking rod 93 presses and fixes the steel bar. The locking rod 93 stops moving downward, and the buffer rod 96 also stops moving downward. The buffer tube 95 continues to move downward and compresses the first spring 97. When the trigger frame 94 continues to rotate forward and contacts the bottom of the guide rail 91, the trigger frame 94 stops moving downward, and the trigger frame 94 stops driving the buffer tube 95 to move downward, and then the bending rod 6 bends the pressed and fixed steel bar again. When the steel bar is bent to the required angle, the first motor 4 is started to drive the bending rod 6 to rotate forward and reset through the elastic expansion plate 5. The bending rod 6 rotates forward and resets to drive the trigger frame 94 to rotate forward and reset. When the trigger frame 94 rotates forward and resets to disengage from the bottom of the guide rail 91, due to the action of the second spring 98, the trigger frame 94 moves upward and resets to drive the buffer tube 95 to move upward. The buffer tube 95 moves upward to first stretch and reset the first spring 97, and then the buffer tube 95 drives the buffer rod 96 to move upward and reset through the first spring 97. The buffer rod 96 moves upward and resets to drive the locking rod 93 to move upward and reset. The locking rod 93 moves upward and resets to disengage from the steel bar. In this way, the steel bar can be prevented from moving upward to affect the bending effect during the bending process, thereby improving the bending effect of the steel bar.

[0040] When the contraction plate 82 moves to the left, the contraction plate 82 also drives the piston rod 106 of the single-rod piston cylinder 101 to move to the left. The piston rod 106 of the single-rod piston cylinder 101 moves to the left, and the air is pushed into the shunt tube 102. The air in the shunt tube 102 is discharged into the sleeve 103. The air in the sleeve 103 drives the piston rod 106 to move upward. The piston rod 106 moves upward and drives the conical frame 104 to move upward. The conical frame 104 moves upward and drives the universal seat 105 to move to the left. The universal seat 105 moves to the left and drives The bending rod 6 moves to the left, and the bending rod 6 moves to the left to compress the elastic telescopic plate 5. The bending rod 6 moves to the left synchronously with the contraction plate 82. When the contraction plate 82 moves to the left to clamp the steel bar, the bending rod 6 also contacts the steel bar, and the contraction plate 82 stops moving to the left. The piston rod 106 of the single-rod piston cylinder 101 stops moving to the left, the air stops being discharged into the sleeve 103, the conical frame 104 stops driving the universal seat 105 to move to the left, and the universal seat 105 stops driving the bending rod 6 to move to the left, and the steel bar can be bent. When the shrink plate 82 moves to the right and resets, the shrink plate 82 drives the piston rod 106 of the single-rod piston cylinder 101 to move to the right and reset, and the air in the sleeve 103 is pumped back into the single-rod piston cylinder 101 through the shunt pipe 102. As the air is pumped away, a reset is formed in the sleeve 103, which drives the piston rod 106 to move downward and reset. The piston rod 106 moves downward and resets, which drives the conical frame 104 to move downward and reset. The conical frame 104 resets without limiting the universal seat 105. Due to the effect of the elastic expansion plate 5, the elastic expansion plate 5 stretches and resets, which drives the bending rod 6 to move to the right and reset. The bending rod 6 resets and drives the universal seat 105 to move to the right and reset. In this way, the bending rod 6 can be prevented from intermittently affecting the bending with the steel bars of different thicknesses, thereby ensuring that the bending rod 6 can effectively bend the steel bars of different thicknesses. Example 3

[0041] On the basis of the embodiment 1 and the embodiment 2, a buffer plate 11 and a third spring 12 are also included. Fig.11 As shown, a buffer plate 11 is slidably connected to the upper rear side of the positioning plate 71. When the steel bar contacts the buffer plate 11, the buffer plate 11 can buffer the steel bar. A third spring 12 is symmetrically connected between the inner front side surface of the buffer plate 11 and the upper rear side surface of the positioning plate 71.

[0042] Also includes an auxiliary wheel 13, see Fig.12 As shown, four auxiliary wheels 13 are rotatably connected at even intervals on the front side of the top of the load-bearing plate 1. When the steel bars are in contact with the auxiliary wheels 13, the auxiliary wheels 13 can guide the steel bars.

[0043] When the steel bar is placed on the bearing plate 1, the steel bar is pushed to move backward and is positioned by the positioning plate 71. The steel bar moves backward and contacts the buffer plate 11. The buffer plate 11 buffers the positioning of the steel bar due to the action of the third spring 12. In this way, the steel bar can be prevented from violently contacting the positioning plate 71, which may cause the positioning plate 71 to be deformed and damaged, thereby ensuring the safety of the positioning plate 71.

[0044] When the steel bar is placed on the bearing plate 1, the steel bar contacts the auxiliary wheel 13, and then the auxiliary wheel 13 guides the steel bar when the steel bar moves backward and is positioned through the positioning plate 71. In this way, the friction between the steel bar and the bearing plate 1 can be reduced, so that the steel bar moves backward more smoothly.

[0045] Although the present disclosure has been described with respect to only a limited number of embodiments, those skilled in the art having benefit of this disclosure will appreciate that various other embodiments can be devised without departing from the scope of the present invention. Accordingly, the scope of the present invention should be limited only by the appended claims.

Claims

1. A steel bar bending device for building construction, comprising a bearing plate (1), a support frame (2), a positioning column (3), a first motor (4), an elastic telescopic plate (5) and a bending rod (6), wherein the bearing plate (1) is symmetrically fixedly connected to the support frame (2) on both the front and rear sides of the bottom, the bearing plate (1) is fixedly connected to the positioning column (3) for guiding the steel bar at the center position of the top rear side of the bearing plate (1), an arc groove is formed on the rear side of the bearing plate (1), the first motor (4) is fixedly connected to the center position of the bottom rear side of the bearing plate (1), the elastic telescopic plate (5) is fixedly connected to the output shaft of the first motor (4), the right end of the elastic telescopic plate (5) is fixedly connected to the bending rod (6) for bending the steel bar, and the bending rod (6) is located in the arc groove of the bearing plate (1), wherein: It also comprises a positioning mechanism (7) and a clamping mechanism (8); the rear side of the bearing plate (1) is provided with a positioning mechanism (7) for positioning the length of the bent steel bar, and the front side of the bearing plate (1) is provided with a clamping mechanism (8) for clamping and fixing the steel bar.

2. A building construction steel bar bending device according to claim 1, characterized in that: The positioning mechanism (7) comprises a positioning plate (71), a threaded frame (72), a force-bearing wheel (73) and an internal threaded tube (74). The threaded frame (72) is fixedly connected to the middle of the rear side of the bottom of the load-bearing plate (1). A positioning plate (71) for positioning the bending length of the steel bar is slidably mounted between the left and right sides of the threaded frame (72). The inner side of the lower part of the positioning plate (71) is symmetrically rotatably connected to the internal threaded tube (74). The internal threaded tube (74) is threadedly connected to the threaded frame (72). The force-bearing wheel (73) is rotatably connected to the middle of the lower part of the positioning plate (71). The front side of the force-bearing wheel (73) and the outer sides of the internal threaded tubes (74) on the left and right sides are driven by a synchronous belt assembly.

3. A building construction steel bar bending device according to claim 2, characterized in that: The clamping mechanism (8) comprises a fixed plate (81), a retractable plate (82), a screw rod (83) and a second motor (84); the fixed plate (81) is fixedly connected to the left side of the front of the carrier plate (1); the retractable plate (82) for clamping and fixing the steel bar is slidably connected to the right side of the front of the carrier plate (1); the retractable plate (82) corresponds to the fixed plate (81); the screw rod (83) for driving the retractable plate (82) to move is rotatably connected to the front of the carrier plate (1); the screw rod (83) is threadedly connected to the middle of the retractable plate (82); the second motor (84) is fixedly connected to the front side of the right side of the carrier plate (1); the output shaft of the second motor (84) is fixedly connected to the right end of the screw rod (83).

4. A building construction steel bar bending device according to claim 3, characterized in that: It also includes a locking mechanism (9) for pressing and fixing the steel bars.

5. A building construction steel bar bending device according to claim 4, characterized in that: The locking mechanism (9) comprises a guide rail (91), a guide plate (92), a locking rod (93), a trigger frame (94), a buffer tube (95), a buffer rod (96), a first spring (97) and a second spring (98); the lower right portion of the bending rod (6) is slidably connected to the trigger frame (94); two second springs (98) are connected between the left bottom portion of the trigger frame (94) and the inner side of the bending rod (6); the middle portion of the bending rod (6) is slidably connected to the buffer tube (95); the lower portion of the buffer tube (95) is fixedly connected to the middle portion of the left side of the trigger frame (94); A buffer rod (96) is slidably connected to the inner side of the buffer tube (95), a first spring (97) is connected between the lower part of the buffer rod (96) and the upper part of the inner side of the buffer tube (95), a locking rod (93) for pressing and limiting the steel bar is fixedly connected to the top of the buffer rod (96), a guide plate (92) is fixedly connected to the right rear side of the top of the carrier plate (1), the guide plate (92) is slidably connected to the right side of the locking rod (93), a guide rail (91) for driving the trigger frame (94) to move downward is fixedly connected to the rear side of the bottom of the carrier plate (1), and the front parts of the left and right sides of the guide rail (91) are inclined surfaces.

6. A building construction steel bar bending device according to claim 5, characterized in that: It also includes a contraction mechanism (10) for making the bending rod (6) in close contact with the steel bar.

7. A building construction steel bar bending device according to claim 6, characterized in that: The retracting mechanism (10) comprises a single-rod piston cylinder (101), a flow divider (102), a sleeve (103), a conical frame (104), a universal seat (105) and a piston rod (106). The bottom ends of the bending rods (6) are rotatably connected to the universal seat (105). Three sleeves (103) are fixedly connected to the bottom of the bearing plate (1) at even intervals. The inner sides of the three sleeves (103) are slidably connected to the piston rods (106). A universal seat (105) for driving the universal seat (106) is fixedly connected between the bottom ends of the three piston rods (106). A conical frame (104) moves inwardly toward the universal seat (105), the inner side of the conical frame (104) contacts the universal seat (105), a single-rod piston cylinder (101) is fixedly connected to the left front side of the bottom of the bearing plate (1), a shunt pipe (102) is connected to the left side of the single-rod piston cylinder (101), the tail end of the shunt pipe (102) is fixedly connected and connected to the lower front sides of the three single-rod piston cylinders (101), and the right end of the piston rod (106) of the single-rod piston cylinder (101) is fixedly connected to the left side of the contraction plate (82).

8. A building construction steel bar bending device according to claim 7, characterized in that: It also includes a buffer plate (11) and a third spring (12); the buffer plate (11) for buffering the steel bars is slidably connected to the upper rear side of the positioning plate (71); the third spring (12) is symmetrically connected between the inner front side of the buffer plate (11) and the upper rear side of the positioning plate (71).

9. A building construction steel bar bending device according to claim 8, characterized in that: It also includes auxiliary wheels (13), and four auxiliary wheels (13) for guiding the steel bars are rotatably connected at even intervals to the front side of the top of the load-bearing plate (1).

10. A building construction steel bar bending device according to claim 9, characterized in that: It also includes a grip rod (75) which is fixedly connected to an eccentric position on the rear side of the force-bearing wheel (73).

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