Traction and straightening system for multiple steel bars

Abstract

The utility model discloses a traction and straightening system for multiple reinforcing steel bars, and belongs to the technical field of reinforcing steel bar machining. Comprising a rack, N steel bar unwinding structures, N steel bar traction structures, N straightening structures and N-1 traction plates, and each straightening structure comprises a double-roller guide mechanism, a left-right roller straightening mechanism and an upper-lower roller straightening mechanism; the machine frame comprises an unwinding machine frame and a straightening support, the reinforcing steel bar unwinding structure and the reinforcing steel bar traction structure are both arranged on the unwinding machine frame, N stand columns are arranged on the straightening support side by side front and back, a traction plate is arranged on the tops of the stand columns except the stand column at the front end, and fixing rods are arranged on the tops of the stand columns; the double-roller guide mechanism, the left and right roller straightening mechanism and the upper and lower roller straightening mechanism are arranged on the fixed rod; the reinforcing steel bar bypasses the straightening structure and then backwards penetrates through the traction plate on the next stand column; the reinforcing steel bars output by the last reinforcing steel bar unwinding structure only bypass the straightening structure; and reinforcing steel bars output by the (N-1) reinforcing steel bar unwinding structures in the front penetrate through the corresponding guide holes correspondingly.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of steel bar processing, especially relates to a traction and straightening system of multiple steel bars, which can be used for preparing steel bar trusses. BACKGROUND

[0002] A steel bar truss is usually composed of five steel bars, including three large steel bars and two small steel bars. The three large steel bars are distributed in the shape of an isosceles triangle, and the two small steel bars are arranged in a wave shape and are respectively arranged on two sides of the isosceles triangle. In the process of automatic assembly of the steel bar truss, the five steel bars need to be output in a certain arrangement (the usual arrangement is: four steel bars at the bottom and one steel bar at the top, the four steel bars at the bottom are arranged side by side and are sequentially a large steel bar, a small steel bar, a small steel bar, and a large steel bar, and the steel bar at the top is a large steel bar). Then, the five steel bars need to be output from the five steel bar unwinding structures and arranged in a certain order.

[0003] A patent with the application number CN202121725793.5 discloses a steel bar feeding device for steel bar truss production, which includes a rack, five steel bar unwinding structures arranged side by side on the left side of the rack, five vertical guide rollers vertically arranged on the rack, five steel bar guide structures arranged side by side on the right side of the rack, and a steel bar positioning structure on the rack. A vertical guide roller is arranged in front of the right side of each steel bar unwinding structure, and a steel bar guide structure is arranged on the right side of each steel bar unwinding structure. The steel bar guide structure is arranged behind the right side of the corresponding vertical guide roller, and the steel bar positioning structure is arranged behind the corresponding steel bar guide structure. The steel bar guide structure includes a rectangular four-hole traction plate arranged on the rack along the left-right direction, an opposed roller guide mechanism arranged on the left side of the rectangular four-hole traction plate and on the rack, a left-right roller straightening mechanism, and an up-down roller straightening mechanism. Four first traction holes are arranged in a rectangular shape on the rectangular four-hole traction plate. The steel bar positioning structure includes a row-shaped four-hole traction plate arranged on the rack along the left-right direction and a guide wheel traction mechanism arranged on the rack above the middle part of the row-shaped four-hole traction plate. Four second traction holes are arranged side by side on the row-shaped four-hole traction plate. The steel bar is wound out from the steel bar unwinding structure, passes in front of the corresponding vertical guide roller, sequentially passes through the corresponding opposed roller guide mechanism, left-right roller straightening mechanism, and up-down roller straightening mechanism, and then reaches the first traction hole of the rear steel bar guide structure or the steel bar positioning structure. Finally, the steel bar is output from the second traction hole of the steel bar positioning structure or the guide wheel traction mechanism.

[0004] In the prior art, the steel bar feeding device for steel bar truss production comprises a rack, five steel bar unwinding structures, five steel bar traction structures, five straightening structures and four traction plates, the five steel bar unwinding structures are arranged side by side in front and back, the five straightening structures are arranged side by side in front and back, one steel bar traction structure and one straightening structure are arranged correspondingly beside each steel bar unwinding structure, the steel bar traction structure is located between the steel bar unwinding structure and the straightening structure and is located in front of the steel bar unwinding structure, and the traction plate is provided with four guide holes. The straightening structure comprises, from front to back, a roller guiding mechanism, left and right roller straightening mechanisms and upper and lower roller straightening mechanisms.

[0005] In the prior art, a large number of steel bar unwinding structures, steel bar traction structures, straightening structures, traction plates and steel bars need to be arranged, which can cause the equipment to be crowded, and the rack needs to be arranged to be relatively complex. Practical new type content

[0006] In order to solve the foregoing problems, the embodiments of the present application provide a traction and straightening system for multiple steel bars, which is based on CN202121725793.5 and optimized, the steel bar unwinding structure and the steel bar traction structure are arranged in sequence on the unwinding rack, the straightening structure and the traction plate belong to one column, the rack structure is simplified, and the equipment is more compact. The technical scheme is as follows:

[0007] The utility model discloses an embodiment provides a kind of traction and straightening system of multiple reinforcing bars, which includes rack, N reinforcing bar unwinding structure 1, N reinforcing bar traction structure 2, N straightening structure 3 and N-1 piece traction plate 4, N reinforcing bar unwinding structure 1 is side by side arranged before and after, N straightening structure 3 is side by side arranged before and after, a reinforcing bar traction structure 2 and a straightening structure 3 are correspondingly arranged in each reinforcing bar unwinding structure 1 side, the reinforcing bar traction structure 2 is located between reinforcing bar unwinding structure 1 and straightening structure 3 and it is located in the front of reinforcing bar unwinding structure 1, N-1 guide holes are equipped on the traction plate 4;The straightening structure 3 includes from front to back sequentially arranged pair of roller guide mechanism 31, left and right roller straightening mechanism 32 and upper and lower roller straightening mechanism 33;The rack includes left and right side by side arranged unwinding rack 6 and straightening support 7, and the unwinding rack 6 and the straightening support 7 are all arranged along front and back, and the reinforcing bar unwinding structure 1 and the reinforcing bar traction structure 2 are all arranged on the unwinding rack 6, and N vertical columns 8 are side by side arranged on the straightening support 7 before and after, and one vertical column 8 is correspondingly arranged in each reinforcing bar unwinding structure 1 side, and a traction plate 4 is arranged on the top of the vertical column 8 except the vertical column 8 at the front end, and a fixed rod 9 is arranged on the top of each vertical column 8 and close to the side of reinforcing bar unwinding structure 1, and the fixed rod 9 is arranged along front and back, and the middle part is fixed on the vertical column 8;The pair of roller guide mechanism 31, left and right roller straightening mechanism 32 and upper and lower roller straightening mechanism 33 are respectively arranged at the front end, front and rear of the fixed rod 9;The reinforcing bar 5 output by the reinforcing bar unwinding structure 1 passes through the straightening structure 3 on the corresponding vertical column 8, and then passes through the traction plate 4 on the next vertical column 8 behind;The reinforcing bar 5 output by the last reinforcing bar unwinding structure 1 only passes through the corresponding straightening structure 3;The reinforcing bar 5 output by the N-1 reinforcing bar unwinding structure 1 in front passes through the corresponding guide hole.

[0008] Further, the utility model embodiment between unwinding rack 6 and straightening support 7 is side by side arranged before and after M root bottom beam 10, and M is less than N;The bottom beam 10 is arranged along left and right and is placed on the ground;The straightening support 7 includes straightening beam 71 along front and back and M root support beam 72 side by side arranged on the downside before and after, and the upper side end of each bottom beam 10 is correspondingly provided with a root support beam 72, and the support beam 72 is vertically arranged, and the vertical column 8 is side by side arranged on the upside of straightening beam 71 before and after.

[0009] Preferably, the bottom end of the support beam 72 in the utility model embodiment is side by side arranged with two reinforcing plates 73 before and after;The reinforcing plate 73 is arranged along left and right, and the downside is fixed on the upside of the bottom beam 10, and the left and right ends extend relative to the corresponding side of the support beam 72.

[0010] Specifically, N is 5 in the utility model embodiment.

[0011] Specifically, the traction plate 4 in the embodiment of the utility model is a rectangular plate arranged along the left-right direction, and the four guide holes are arranged in a rectangular shape and are respectively located at the four corners of the traction plate 4.

[0012] Specifically, the fixed rod 9 in the embodiment of the utility model is a rectangular rod, the pair of roller guide mechanisms 31 and the left-right roller straightening mechanism 32 are arranged on the upper side of the fixed rod 9, and the up-down roller straightening mechanism 33 is arranged on the side of the fixed rod 9 close to the steel bar unwinding structure 1.

[0013] In the embodiment of the utility model, the up-down roller straightening mechanism 33 comprises a plurality of slide rods 41 arranged side by side in front of and behind the upper side of the fixed rod 9, a slide block 42 arranged vertically between adjacent two slide rods 41, a top beam 43 arranged on the top of the plurality of slide rods 41 and along the front-rear direction, a plurality of hand wheels 44 arranged side by side in front of and behind the top beam 43, an upper straightening wheel 45 on the slide block 42, and a plurality of lower straightening wheels 46 arranged side by side in front of and behind the fixed rod 9. The slide rod 41 is arranged vertically, and one hand wheel 44 is arranged above each slide block 42. The slide block 42 is slidably arranged on the adjacent two slide rods 41 on the front and rear sides. The hand wheel 44 is arranged vertically and is threadedly connected with the top beam 43, and the lower end is rotationally connected with the top of the slide block 42. The upper straightening wheel 45 and the lower straightening wheel 46 are both located on the side close to the steel bar unwinding structure 1, are respectively located on the upper side and the lower side of the steel bar 5, and are both arranged along the left-right direction. The plurality of upper straightening wheels 45 are arranged side by side in front of and behind, and the plurality of upper straightening wheels 45 and the plurality of lower straightening wheels 46 are arranged alternately.

[0014] Specifically, the slide block 42 in the embodiment of the utility model is a rectangular block, and the front and rear sides of the rectangular block are both provided with a circular arc groove matched with the slide rod 41. The circular arc groove is slidably arranged on the slide rod 41.

[0015] In the embodiment of the utility model, the unwinding rack 6 is a rectangular beam arranged along the front-rear direction, a fixed column 11 is arranged on the unwinding rack 6 and located in front of each steel bar unwinding structure 1, a fixed arm 12 is arranged on the fixed column 11, the fixed arm 12 is arranged on the inclined straight support 7 from the rear to the front and the rear end is fixed on the fixed column 11, and the steel bar traction structure 2 is fixed on the front end of the fixed arm 12.

[0016] The technical scheme provided by the embodiment of the utility model has the beneficial effects that the embodiment of the utility model provides a steel bar traction and straightening system, the steel bar unwinding structure and the steel bar traction structure are sequentially arranged on the unwinding rack, the straightening structure and the traction plate are arranged on one stand column, the rack structure is simplified, the equipment is more compact (the straightening structure and the traction plate are integrated, the space is wider at other positions, and the equipment is easy to maintain), and the up-down roller straightening mechanism is optimized to make the structure more compact. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the structure schematic diagram of the traction and straightening system of the multiple steel bars in the embodiment of the utility model;

[0018] Figure 2 is Figure 1 the local enlarged view of the first steel bar unwinding structure in the embodiment;

[0019] Figure 3 is Figure 1 the local enlarged view of the second steel bar unwinding structure in the embodiment;

[0020] Figure 4 is the structure schematic diagram of the straightening support combined with the stand;

[0021] Figure 5 is the structure schematic diagram of the traction plate, stand and fixed rod combination;

[0022] Figure 6 is the structure schematic diagram of the straightening structure;

[0023] Figure 7 is the structure schematic diagram of the up and down roller straightening mechanism.

[0024] In the figure: 1 steel bar unwinding structure, 2 steel bar traction structure, 3 straightening structure, 4 traction plate, 5 steel bar, 6 unwinding frame, 7 straightening support, 8 stand, 9 fixed rod, 10 bottom beam, 11 fixed column, 12 fixed arm;

[0025] 31 pair of roller guide mechanism, 32 left and right roller straightening mechanism, 33 up and down roller straightening mechanism;

[0026] 41 sliding rod, 42 sliding block, 43 top beam, 44 hand wheel, 45 upper straightening wheel, 46 lower straightening wheel;

[0027] 71 straightening beam, 72 supporting beam, 73 reinforcing plate. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model will be described in further detail below in combination with the drawings.

[0029] Embodiment 1

[0030] Referring to Figures 1-7, embodiment 1 provides a traction and straightening system of a plurality of steel bars, which comprises a rack, N steel bar unwinding structures 1, N steel bar traction structures 2, N straightening structures 3 and N-1 traction plates 4. The rack comprises a left and right side-by-side arrangement of an unwinding rack 6 and a straightening support 7, and the unwinding rack 6 and the straightening support 7 are arranged along the front and back. Specifically, the unwinding rack 6 is a rectangular beam arranged along the front and back. The N steel bar unwinding structures 1 are arranged side by side in front and back, and the steel bar unwinding structure 1 and the steel bar traction structure 2 are arranged on the unwinding rack 6, and one steel bar traction structure 2 is arranged in front of each steel bar unwinding structure 1. The N straightening structures 3 are arranged side by side in front and back and are arranged on the N vertical columns 8 respectively, and one steel bar traction structure 2 and one straightening structure 3 are arranged on the side of each steel bar unwinding structure 1, and the steel bar traction structure 2 is located between the steel bar unwinding structure 1 and the straightening structure 3 and is located in front of the steel bar unwinding structure 1. Specifically, a fixed column 11 is arranged on the unwinding rack 6 in front of each steel bar unwinding structure 1, the fixed column 11 is vertically arranged and a fixed arm 12 is arranged on the top end of the fixed column 11, the fixed arm 12 is arranged obliquely from back to front to the straightening support 7 and the rear end of the fixed arm 12 is fixed to the top end of the fixed column 11. The steel bar traction structure 2 is fixed to the front end of the fixed arm 12, which can be a vertically arranged guide roller or guide wheel. The traction plate 4 is arranged along the left and right and has N-1 guide holes.

[0031] The straightening structure 3 comprises a roller pair guiding mechanism 31, a left and right roller straightening mechanism 32 and an upper and lower roller straightening mechanism 33 arranged in order from front to back, which is consistent with the prior art. The straightening support 7 has N vertical columns 8 arranged side by side in front and back, and N is an integer greater than or equal to 2. One vertical column 8 is arranged on the side of each steel bar unwinding structure 1, and the steel bar unwinding structure 1 and the corresponding vertical column 8 are arranged side by side in left and right. The top of each vertical column 8 except the front vertical column 8 is provided with a traction plate 4, and the top of each vertical column 8 and the side close to the steel bar unwinding structure 1 is provided with a fixed rod 9. The fixed rod 9 is arranged along the front and back, and the middle part is fixed to the vertical column 8, which is a rectangular rod. The roller pair guiding mechanism 31, the left and right roller straightening mechanism 32 and the upper and lower roller straightening mechanism 33 are arranged at the front end, the front part and the rear part of the fixed rod 9 respectively; specifically, the roller pair guiding mechanism 31 and the left and right roller straightening mechanism 32 are arranged on the upper side of the fixed rod 9, and the upper and lower roller straightening mechanism 33 is arranged on the side close to the steel bar unwinding structure 1 of the fixed rod 9. The steel bar 5 output by the steel bar unwinding structure 1 passes through the straightening structure 3 on the corresponding vertical column 8, and then passes through the traction plate 4 on the next vertical column 8 (the vertical column 8 behind the corresponding vertical column 8). The steel bar 5 output by the last steel bar unwinding structure 1 only passes through the corresponding straightening structure 3 (without passing through the traction plate 4). The steel bars 5 output by the N-1 steel bar unwinding structures 1 in front pass through the corresponding guide holes respectively.

[0032] Referring to Figures 1-3And 6-7, the utility model embodiment upper and lower roller straightening mechanism 33 includes K slip bar 41, K-1 slip block 42, a roof beam 43, K-1 hand wheel 44, K-1 upper straightening wheel 45 and multiple (K-2 or K) lower straightening wheel 46 etc.. K is the integer of greater than or equal to 2. K slip bar 41 is side by side arranged in front and back, it is set in the upper side of fixed link 9, it is all vertically arranged. One slip block 42 is arranged between two adjacent slip bars 41. Slip block 42 is vertically arranged, it is specifically rectangular block, the front and back two sides are all along vertical direction with slip bar 41 matched with circular arc groove, the front and back two sides are respectively slidably arranged on the two adjacent slip bars 41. Circular arc groove is slidably arranged on slip bar 41. Roof beam 43 is arranged along front and back, it is arranged at the top end of K slip bar 41. The upper of each slip block 42 corresponds to set up one hand wheel 44, and one upper straightening wheel 45 is correspondingly arranged on it. K-1 hand wheel 44 is side by side arranged in front and back; hand wheel 44 is vertically arranged, it is screwed with roof beam 43, and the lower end is rotatably connected with the top of slip block 42. Rotating hand wheel 44 can adjust slip block 42 up and down, and then adjust upper straightening wheel 45 to facilitate the initial use when steel bar 5 is inserted. Multiple lower straightening wheels 46 are side by side arranged in front and back on fixed link 9. Upper straightening wheel 45 and lower straightening wheel 46 are all located on the side close to steel bar pay-off structure 1, and are respectively located on the upper side and the lower side of steel bar 5, and are all arranged along left and right. Multiple upper straightening wheels 45 are side by side arranged in front and back, and multiple upper straightening wheels 45 and multiple lower straightening wheels 46 are staggered.

[0033] Example 2

[0034] Referring to Figures 1-4 , example 2 provides a kind of traction and straightening system of multiple steel bars, its structure is substantially same with the structure of example 1, different is that: M root bottom beam 10 is side by side arranged in front and back between pay-off rack 6 and straightening support 7 in this embodiment, M is less than N. Bottom beam 10 is along left and right and it is placed on ground. Bottom beam 10 and pay-off rack 6 cooperate to realize the support of rack. Straightening support 7 includes straightening beam 71 along front and back and M root support beam 72 side by side arranged in front and back on its lower side, etc., and the upper side end (specifically can be left end) of each bottom beam 10 is correspondingly provided with a support beam 72, and support beam 72 is vertically arranged, and stand 8 is side by side arranged in front and back on the upper side of straightening beam 71. Specifically, bottom beam 10, support beam 72 and stand 8 are all rectangular beams. Preferably, the bottom end of support beam 72 is side by side arranged with two reinforcing plates 73 in front and back. Reinforcing plate 73 is along left and right and its lower side is fixed on the upper side of bottom beam 10, and the left and right ends are extended relative to the corresponding side of support beam 72.

[0035] Example 3

[0036] Referring to Figures 1-4 , example 3 provides a kind of traction and straightening system of multiple steel bars, its structure is substantially same with the structure of example 2, different is that: M is 3 in this embodiment.

[0037] Embodiment 4

[0038] Embodiment 4 provides a steel bar traction and straightening system, which has substantially the same structure as that of Embodiment 1, except that the unwinding frame 6 is located on the right side, the straightening support 7 is located on the left side, the fixed arm 12 is arranged obliquely from right to left and forward, and the fixed rod 9 is arranged on the right side of the upper end of the stand 8.

[0039] Embodiment 5

[0040] Referring to Figure 1 , Embodiment 5 provides a steel bar traction and straightening system for producing steel bar trusses, which has substantially the same structure as that of Embodiment 4, except that N is 5 in this embodiment. Specifically, the traction plate 4 is a rectangular plate arranged along the left-right direction, and the four guide holes are arranged in a rectangular shape and located at the four corners of the traction plate 4. From front to back, the first stand 8 is not provided with a traction plate 4. Specifically, the steel bar 5 output by the first steel bar unwinding structure 1 bypasses the steel bar traction structure 2 on the first stand 8, and then passes through the corresponding guide holes (specifically, the lower left guide hole) on the traction plates 4 on the second stand 8, the third stand 8, the fourth stand 8, and the fifth stand 8 in turn. The steel bar 5 output by the second steel bar unwinding structure 1 bypasses the steel bar traction structure 2 on the second stand 8, and then passes through the corresponding guide holes (specifically, the upper left guide hole) on the traction plates 4 on the third stand 8, the fourth stand 8, and the fifth stand 8 in turn. The steel bar 5 output by the third steel bar unwinding structure 1 bypasses the steel bar traction structure 2 on the third stand 8, and then passes through the corresponding guide holes (specifically, the lower right guide hole) on the traction plates 4 on the fourth stand 8 and the fifth stand 8. The steel bar 5 output by the fourth steel bar unwinding structure 1 bypasses the steel bar traction structure 2 on the fourth stand 8, and then passes through the corresponding guide hole (specifically, the upper right guide hole) on the traction plate 4 on the fifth stand 8. The steel bar 5 output by the fifth steel bar unwinding structure 1 bypasses the steel bar traction structure 2 on the fifth stand 8.

[0041] Embodiment 6

[0042] Referring to Figure 1 , Embodiment 6 provides a steel bar traction and straightening system for producing steel bar trusses, which has substantially the same structure as that of Embodiment 1, except that the number of the upper straightening wheels 45 is three and the number of the lower straightening wheels 46 is four in this embodiment.

[0043] In the embodiments of the present application, "first", "second", "third", "fourth", and "fifth" only serve to distinguish, and have no other special meanings.

[0044] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A system for pulling and straightening a plurality of steel bars, comprising a frame, N steel bar unwinding structures (1), N steel bar pulling structures (2), N straightening structures (3) and N-1 pulling plates (4), the N steel bar unwinding structures (1) are arranged side by side in front of and behind each other, the N straightening structures (3) are arranged side by side in front of and behind each other, one steel bar pulling structure (2) and one straightening structure (3) are arranged corresponding to each steel bar unwinding structure (1), the steel bar pulling structure (2) is located between the steel bar unwinding structure (1) and the straightening structure (3) and in front of the steel bar unwinding structure (1), the pulling plate (4) is provided with N-1 guide holes; the straightening structure (3) comprises a pair of roller guiding mechanism (31), left and right roller straightening mechanism (32) and upper and lower roller straightening mechanism (33) arranged in front of and behind each other; characterized in that, the frame comprises unwinding frame (6) and straightening support (7) arranged side by side in left and right directions, the unwinding frame (6) and the straightening support (7) are arranged in front of and behind each other, the steel bar unwinding structure (1) and the steel bar pulling structure (2) are arranged on the unwinding frame (6), the straightening support (7) is provided with N vertical columns (8) arranged side by side in front of and behind each other, one vertical column (8) is arranged corresponding to each steel bar unwinding structure (1), the top of each vertical column (8) except the vertical column (8) at the front end is provided with a pulling plate (4), the top of each vertical column (8) and close to one side of the steel bar unwinding structure (1) is provided with a fixed rod (9); the fixed rod (9) is arranged in front of and behind each other, the middle part of which is fixed on the vertical column (8); the pair of roller guiding mechanism (31), the left and right roller straightening mechanism (32) and the upper and lower roller straightening mechanism (33) are arranged at the front end, the front part and the rear part of the fixed rod (9) respectively; the steel bar (5) output by the steel bar unwinding structure (1) passes through the straightening structure (3) on the corresponding vertical column (8) and then passes through the pulling plate (4) on the next vertical column (8) from back to front; the steel bar (5) output by the last steel bar unwinding structure (1) only passes through the corresponding straightening structure (3); the steel bar (5) output by the N-1 steel bar unwinding structures (1) in front passes through the corresponding guide hole respectively.

2. A system for pulling and straightening a plurality of reinforcing bars as claimed in claim 1 wherein, M bottom beams (10) are arranged side by side in front of and behind each other between the unwinding frame (6) and the straightening support (7), M is less than N; the bottom beam (10) is arranged in left and right directions and placed on the ground; the straightening support (7) comprises straightening beam (71) arranged in front of and behind each other and M support beams (72) arranged side by side in front of and behind each other below the straightening beam (71), one support beam (72) is arranged corresponding to the upper side end of each bottom beam (10), the support beam (72) is arranged vertically, and the vertical column (8) is arranged on the upper side of the straightening beam (71) side by side in front of and behind each other.

3. The system for pulling and straightening a plurality of reinforcing bars according to claim 2, wherein, Two reinforcing plates (73) are arranged side by side in front of and behind each other at the bottom end of the support beam (72); the reinforcing plate (73) is arranged in left and right directions, the lower side of which is fixed on the upper side of the bottom beam (10), and the left and right ends of which extend relative to the corresponding side of the support beam (72).

4. The system for pulling and straightening a plurality of reinforcing bars of claim 1, wherein, N is 5.

5. The system for pulling and straightening a plurality of reinforcing bars according to claim 4, wherein, The pulling plate (4) is a rectangular plate arranged in left and right directions, and the four guide holes are arranged in a rectangular shape and located on the four corners of the pulling plate (4) respectively.

6. The system for pulling and straightening a plurality of reinforcing bars of claim 1, wherein, The fixed rod (9) is a rectangular rod, the pair of roller guide mechanisms (31) and the left and right roller straightening mechanisms (32) are arranged on the upper side of the fixed rod (9), and the upper and lower roller straightening mechanisms (33) are arranged on the side of the fixed rod (9) close to the steel bar unwinding structure (1).

7. The system for pulling and straightening a plurality of reinforcing bars according to claim 6, wherein The upper and lower roller straightening mechanisms (33) comprise a plurality of slide rods (41) arranged side by side in front of and behind on the upper side of the fixed rod (9), a slide block (42) arranged vertically between adjacent two slide rods (41), a top beam (43) arranged along the front and back direction on the top of the plurality of slide rods (41), a plurality of hand wheels (44) arranged side by side in front of and behind on the top beam (43), an upper straightening wheel (45) on the slide block (42), and a plurality of lower straightening wheels (46) arranged side by side in front of and behind on the fixed rod (9). The slide rods (41) are vertically arranged, and one hand wheel (44) is arranged above each slide block (42). The slide block (42) is slidably arranged on the adjacent two slide rods (41) on the front and back sides. The hand wheel (44) is vertically arranged and is threadedly connected with the top beam (43), and the lower end is rotatably connected with the top of the slide block (42). The upper straightening wheel (45) and the lower straightening wheel (46) are arranged on the side close to the steel bar unwinding structure (1), and are arranged on the upper side and the lower side of the steel bar (5) respectively, and are arranged along the left and right directions. The plurality of upper straightening wheels (45) are arranged side by side in front of and behind, and the plurality of upper straightening wheels (45) and the plurality of lower straightening wheels (46) are arranged alternately.

8. The system for pulling and straightening a plurality of reinforcing bars according to claim 7, wherein The slide block (42) is a rectangular block, and the front and back sides thereof are provided with circular arc grooves matched with the slide rods (41) in the vertical direction. The circular arc grooves are slidably arranged on the slide rods (41).

9. The system for pulling and straightening a plurality of reinforcing bars of claim 1, wherein, The unwinding rack (6) is a rectangular beam arranged along the front and back directions, a fixed column (11) is arranged on the unwinding rack (6) in front of each steel bar unwinding structure (1), a fixed arm (12) is arranged on the fixed column (11), the fixed arm (12) is arranged obliquely to the straight support (7) from back to front and the rear end is fixed on the fixed column (11), and the steel bar traction structure (2) is fixed on the front end of the fixed arm (12).

Images