Truss steel bar traction and positioning device

Abstract

The utility model discloses a traction and positioning device for truss steel bars, and belongs to the technical field of steel profile machining. Comprising a rack, a front four-hole traction plate, a guide wheel traction mechanism, an upper anti-backing traction wheel pair and two lower anti-backing traction wheel pairs, and four traction holes are formed in the front four-hole traction plate; the two lower anti-backing traction wheel pairs are arranged side by side in the left-right direction, located right behind the front four-hole traction plate, located right behind the two traction holes in the two ends respectively and capable of being adjusted in the left-right direction, and one traction wheel on the two lower anti-backing traction wheel pairs can be adjusted up and down; the upper anti-backing traction wheel pair is positioned right behind the guide wheel traction mechanism and can be adjusted up and down, and one traction wheel on the upper anti-backing traction wheel pair can be adjusted up and down; the lower anti-backing traction wheel pair and the upper anti-backing traction wheel pair can only convey steel bars backwards, and three thick steel bars pass through the two lower anti-backing traction wheel pairs and the upper anti-backing traction wheel pair respectively; the diameter of the traction hole is larger than that of the steel bar, and the gap between the two traction wheels of the guide wheel traction mechanism is larger than that of the steel bar.

Description

Technical Field

[0001] This utility model belongs to the field of steel structure profile processing technology, and specifically relates to a traction and positioning device for truss reinforcement. Background Technology

[0002] A steel truss typically consists of five steel bars: three large bars and two small bars. The three large bars are arranged in an isosceles triangle, while the two small bars are wavy and positioned on the two legs of the isosceles triangle. During the automatic assembly of the steel truss, the five bars need to be output in a specific arrangement (typically: four bars at the bottom and one bar at the top; the four bottom bars are arranged side-by-side, in the order of large bar, small bar, small bar, and large bar, while the top bar is a large bar).

[0003] For example, patent application number CN202121725793.5 discloses a steel bar feeding device for steel bar truss production, including a frame and five steel bar unwinding structures arranged side-by-side on the left side of the frame; it also includes five vertical guide rollers vertically mounted on the frame, five steel bar guiding structures arranged side-by-side on the right side of the frame, and a steel bar positioning structure on the frame. Each steel bar unwinding structure has a vertical guide roller located at its right front, and a corresponding steel bar guiding structure located to the right of each unwinding structure. The steel bar guiding structure is located to the right rear of the corresponding vertical guide roller, and the steel bar positioning structure is located directly behind the rearmost steel bar guiding structure. The steel bar guiding structure includes a rectangular four-hole traction plate and a rectangular four-hole traction plate arranged on the frame in a left-right direction. The guide plate has a roller guiding mechanism, a left and right roller straightening mechanism, and an upper and lower roller straightening mechanism arranged side by side on the left and right sides of the frame. The rectangular four-hole traction plate has four first traction holes arranged in a rectangular shape. The rebar positioning structure includes a row of four-hole traction plates arranged along the left and right directions on the frame and a guide wheel traction mechanism located on the frame and directly above the center of the row of four-hole traction plates. The row of four-hole traction plates has four second traction holes arranged side by side on the left and right sides. The rebar is wound out by the rebar unwinding structure, passes around the front side of the corresponding vertical guide roller, passes through the corresponding roller guiding mechanism, the left and right roller straightening mechanism, and the upper and lower roller straightening mechanism in sequence, and then to the first traction hole of the rebar guiding structure or the rebar positioning structure at the rear, and is finally output by the second traction hole of the rebar positioning structure or the guide wheel traction mechanism.

[0004] When producing steel trusses using a steel truss forming machine, the steel bars are pulled out from their coiled state. However, the steel bars are not very stable after being folded into a truss shape. On the contrary, the coiled steel bars have a certain tensile force. This can easily cause the pulled-out steel bars to be pulled back, resulting in a backward phenomenon. Since the pulled-back steel bars do not return to the originally set height position of the steel truss, the specifications of the produced steel trusses are inconsistent.

[0005] In existing technologies, anti-backward traction wheels can be used to prevent the rebar from reversing. For example, patent application number CN201120371127.6 discloses an anti-backward mechanism for a rebar truss forming machine. It includes a pair of feed rollers installed on the feed inlet of the rebar truss forming machine. The feed rollers are unidirectional wheels that allow the rebar to move only from back to front. One of the feed rollers has a support arm hinged to a support column. The support arm also has a rocker arm. The support column also has an adjusting screw, the front end of which can abut against the rocker arm.

[0006] The existing technology has the following problems:

[0007] 1. The applicant found that only the thick steel bars (which are shaped steel bars) need to be protected against backflow, and it is not necessary for every steel bar to be protected against backflow;

[0008] 2. The three thick steel bars may need to be fine-tuned to ensure the accuracy of the forming. Utility Model Content

[0009] To address the aforementioned problems, this utility model provides a traction and positioning device for truss reinforcing bars. It uses only three anti-backward traction wheel pairs to traction three thick reinforcing bars respectively, ensuring processing accuracy. The two lower anti-backward traction wheel pairs can be finely adjusted left and right, while the upper anti-backward traction wheel pair can be finely adjusted vertically. The technical solution is as follows:

[0010] This utility model provides a traction and positioning device for truss reinforcement bars, including a frame 1, a front four-hole traction plate 2, and a guide wheel traction mechanism 5 above the middle of the front four-hole traction plate 2. The front four-hole traction plate 2 has four traction holes arranged side-by-side. The guide wheel traction mechanism 5 and the two traction holes at both ends are used to traction thicker reinforcement bars 7, and the two traction holes in the middle are used to traction thinner reinforcement bars 8. The device also includes an upper anti-backward traction wheel pair 6 and two lower anti-backward traction wheel pairs 3. The two lower anti-backward traction wheel pairs 3 are arranged side-by-side, located directly behind the front four-hole traction plate 2, and respectively... Located directly behind the two traction holes at both ends, it can be adjusted left and right, and one of its traction wheels can be adjusted up and down; the upper anti-backward traction wheel pair 6 is located directly behind the guide wheel traction mechanism 5, and it can be adjusted up and down, and one of its traction wheels can be adjusted up and down; the lower anti-backward traction wheel pair 3 and the upper anti-backward traction wheel pair 6 can only transport steel bars backward, and the three thick steel bars 7 pass through two lower anti-backward traction wheel pairs 3 and one upper anti-backward traction wheel pair 6 respectively; the diameter of the traction hole is larger than the diameter of the steel bar, and the gap between the two traction wheels of the guide wheel traction mechanism 5 is larger than the diameter of the steel bar.

[0011] Furthermore, the device provided in this embodiment of the present invention also includes a rear four-hole traction plate 4. The front four-hole traction plate 2 and the rear four-hole traction plate 4 are both arranged on the frame 1 in the left-right direction. The rear four-hole traction plate 4 is located directly behind the front four-hole traction plate 2 and has four traction holes arranged side by side on it. The traction holes on the front four-hole traction plate 2 and the rear four-hole traction plate 4 are arranged one-to-one. The lower anti-backward traction wheel pair 3 is located between the front four-hole traction plate 2 and the rear four-hole traction plate 4.

[0012] Preferably, a protective plate is provided between the top of the rear four-hole traction plate 4 and the top of the front four-hole traction plate 2 provided in this embodiment of the present invention; the protective plate is arranged in the front-rear direction, located above the lower anti-backward traction wheel pair 3, and is a transparent plate.

[0013] Preferably, the rear four-hole traction plate 4 provided in this embodiment of the present invention is provided with two guide steel pipes 9 on the rear side, and the two guide steel pipes 9 are respectively provided at the two traction holes at both ends; the guide steel pipes 9 are arranged in the front and rear direction, the front end of which is fixed on the rear four-hole traction plate 4, the rear end of which is fixed on the frame 1, and the inner diameter of which is larger than the diameter of the reinforcing bar; the thick reinforcing bars 7 in the traction holes at both ends pass through the two guide steel pipes 9 respectively.

[0014] Furthermore, the device provided in this embodiment of the present invention also includes a lifting arm 10, which is arranged in the front-to-back direction and is adjustable up and down on the frame 1; the guide wheel traction mechanism 5 and the upper anti-backward traction wheel pair 6 are arranged sequentially on the lower side of the lifting arm 10, and the upper anti-backward traction wheel pair 6 is located above the rear of the guide steel pipe 9.

[0015] The anti-backward traction wheel pair 3 provided in this embodiment includes a lower lifting sleeve 31 vertically disposed on the upper side of the frame 1, a lower lifting rod 32 inside the lower lifting sleeve 31, a first handwheel adjustment structure 33 on the lower side of the frame 1 for driving the lower lifting rod 32 to move up and down, an upper rotating seat 34 at the upper end of the lower lifting rod 32, a first upper traction wheel 35 inside the upper rotating seat 34, a fixed seat 36 on the frame 1 and located inside the lower lifting sleeve 31, a slide seat 37 outside the fixed seat 36 and capable of sliding left and right, a first lower traction wheel 38 outside the slide seat 37 and located directly below the first upper traction wheel 35, and the slide seat 37 and the frame 1 The second handwheel adjustment structure 39 is used to drive the slide 37 to move left and right. The first upper traction wheel 35 and the first lower traction wheel 38 are both arranged in the left and right direction and are respectively located on the upper and lower sides of the corresponding thick steel bar 7. The diameter of the first lower traction wheel 38 gradually decreases from the outside to the inside. The first handwheel adjustment structure 33 is arranged vertically. The handwheel of the first handwheel adjustment structure 33 is arranged vertically downward and is located on the upper side of the frame 1 and on the outside of the front four-hole traction plate 2. The second handwheel adjustment structure 39 is arranged in the left and right direction and is rotatably connected to the slide 37. Its handwheel is located on the outside of the corresponding side of the frame 1.

[0016] Preferably, the two lower anti-backward traction wheel pairs 3 provided in this embodiment of the present invention share a fixed seat 36; the fixed seat 36 is located directly below the two thin steel bars 8, between the lower lifting sleeves 31 of the two lower anti-backward traction wheel pairs 3, and a sliding seat 37 is provided on each of its left and right sides.

[0017] The anti-backward traction wheel pair 6 provided in this embodiment includes an upper lifting sleeve 61 vertically arranged below the lifting arm 10, an upper lifting rod 62 inside the upper lifting sleeve 61, a lower rotating seat 63 at the lower end of the upper lifting rod 62, a second lower traction wheel 64 on the left or right side of the lower rotating seat 63, a third handwheel adjustment structure on the lifting arm 10 for driving the upper lifting rod 62 to move up and down, a pressure arm 65 arranged below the lifting arm 10 in the front-back direction, a second upper traction wheel 66 at the rear end of the pressure arm 65 and located directly above the second lower traction wheel 64, and a lower pressing structure 67 between the pressure arm 65 and the lifting arm 10; the second upper traction wheel 66 and the second lower traction wheel 64 are both arranged in the left-right direction and are respectively located on the upper and lower sides of the corresponding thick steel bar 7; the third handwheel adjustment structure is vertically arranged, and its handwheel is located on the upper side of the lifting arm 10; the middle part of the pressure arm 65 is rotatably arranged on the lifting arm 10 through a left-right rotating shaft, and the lower pressing structure 67 is arranged in the left-right direction and presses the front end of the pressure arm 65 upward.

[0018] In this embodiment of the invention, the traction wheels of the lower anti-backward traction wheel pair 3 and the upper anti-backward traction wheel pair 6 are provided with anti-slip teeth on their circumferential surfaces.

[0019] The beneficial effects of the technical solution provided by this utility model embodiment are as follows: This utility model embodiment provides a traction and positioning device for truss reinforcing bars, which uses only three anti-backward traction wheel pairs to traction three thick reinforcing bars respectively, ensuring processing accuracy; the two lower anti-backward traction wheel pairs can be finely adjusted in the left and right directions, and the upper anti-backward traction wheel pair can be finely adjusted in the vertical direction. The fine-tuning method is simple, usually just by turning the handwheel. The traction accuracy of the two lower thick reinforcing bars is ensured by setting guide steel pipes. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the traction and positioning device for truss reinforcement in an embodiment of this utility model;

[0021] Figure 2 This is a structural schematic diagram of the lower anti-backward traction wheelset;

[0022] Figure 3 This is a structural diagram of the anti-backward traction wheelset.

[0023] In the diagram: 1. Frame, 2. Front four-hole traction plate, 3. Lower anti-backward traction wheel pair, 4. Rear four-hole traction plate, 5. Guide wheel traction mechanism, 6. Upper anti-backward traction wheel pair, 7. Thick steel bar, 8. Thin steel bar, 9. Guide steel pipe, 10. Lifting arm;

[0024] 31 Lower lifting sleeve, 32 Lower lifting rod, 33 First handwheel adjustment structure, 34 Upper rotating seat, 35 First upper traction wheel, 36 Fixed seat, 37 Sliding seat, 38 First lower traction wheel, 39 Second handwheel adjustment structure;

[0025] 61 Upper lifting sleeve, 62 Upper lifting rod, 63 Lower rotating seat, 64 Second lower traction wheel, 65 Pressure arm, 66 Second upper traction wheel, 67 Lower pressing structure. Detailed Implementation

[0026] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0027] Example 1

[0028] See Figure 1-3 Example 1 provides a traction and positioning device for truss reinforcement, including a frame 1, a front four-hole traction plate 2, a guide wheel traction mechanism 5, a lifting arm 10, an upper anti-backward traction wheel pair 6, and two lower anti-backward traction wheel pairs 3. The front four-hole traction plate 2 is mounted on the frame 1 along the left-right direction, and has four traction holes (round holes) arranged side by side on its upper side. The lifting arm 10 is mounted on the frame 1 along the front-back direction and is adjustable up and down (this is a conventional structure, and detailed description is omitted in this embodiment). The guide wheel traction mechanism 5 and the upper anti-backward traction wheel pair 6 are arranged sequentially from front to back on the lower side of the lifting arm 10, with the guide wheel traction mechanism 5 located above the middle of the front four-hole traction plate 2.

[0029] The two lower anti-backward traction wheel pairs 3 are arranged side by side, located directly behind the front four-hole traction plate 2, and directly behind the two traction holes at both ends. They can be adjusted left and right (fine-tuning, such as a distance less than 10mm). One of the traction wheels on them can be adjusted up and down to facilitate the introduction of steel bars during initial use (see the description of patent application number CN201120371127.6). The upper anti-backward traction wheel pair 6 is located directly behind the guide wheel traction mechanism 5. It can be adjusted up and down (fine-tuning, such as a distance less than 10mm). One of the traction wheels on it can be adjusted up and down to facilitate the introduction of steel bars during initial use (see the description of patent application number CN201120371127.6). The lower anti-backward traction wheel pair 3 and the upper anti-backward traction wheel pair 6 can only transport steel bars backward, consistent with the prior art. The three thick steel bars 7 pass through the two lower anti-backward traction wheel pairs 3 and the one upper anti-backward traction wheel pair 6 respectively. The diameter of the traction hole is larger than (e.g., 1-5 mm larger than) the diameter of the reinforcing bar to facilitate fine-tuning. The gap between the two traction wheels of the guide wheel traction mechanism 5 is larger than (e.g., 1-5 mm larger than) the diameter of the reinforcing bar to facilitate fine-tuning.

[0030] Among them, see Figure 1-2 The anti-backward traction wheel pair 3 provided in this embodiment of the utility model includes a lower lifting sleeve 31 vertically arranged on the upper side of the frame 1, a lower lifting rod 32 inside the lower lifting sleeve 31, a first handwheel adjustment structure 33 on the lower side of the frame 1 for driving the lower lifting rod 32 to move up and down, an upper rotating seat 34 at the upper end of the lower lifting rod 32, a first upper traction wheel 35 on the inner side of the upper rotating seat 34 (for ease of description, this patent defines the side closer to the center line of the frame 1 as the inner side), a fixed seat 36 on the frame 1 and located inside the lower lifting sleeve 31, a sliding seat 37 on the outer side of the fixed seat 36 that can slide left and right (via a slide rail or slide rod, etc.), a first lower traction wheel 38 on the outer side of the sliding seat 37 and located directly below the first upper traction wheel 35, and a second handwheel adjustment structure 39 between the sliding seat 37 and the frame 1 for driving the sliding seat 37 to move left and right. The lower lifting rod 32 is a smooth round rod, which is vertically arranged, and its upper end extends upward through the lower lifting sleeve 31. The lower lifting sleeve 31 is a circular sleeve. The upper rotating seat 34 is a rectangular block. The first upper traction wheel 35 and the first lower traction wheel 38 are both arranged in the left-right direction and are located on the upper and lower sides of the corresponding thick steel bar 7, respectively. The diameter of the first lower traction wheel 38 gradually decreases from the outside to the inside, forming a conical structure (with a small cone angle, less than 5°). The first handwheel adjustment structure 33 is vertically arranged; the handwheel of the first handwheel adjustment structure 33 is vertically downward, located on the upper side of the frame 1, and on the outer side of the front four-hole traction plate 2. The second handwheel adjustment structure 39 is arranged in the left-right direction, located on the upper side of the frame 1, and its inner end is rotatably connected to the slide 37. Its handwheel is located on the outer side (left or right) of the corresponding side of the frame 1.

[0031] Among them, see Figure 1 and 3The anti-backward traction wheel pair 6 provided in this embodiment includes an upper lifting sleeve 61 vertically disposed below the lifting arm 10, an upper lifting rod 62 inside the upper lifting sleeve 61, a lower rotating seat 63 at the lower end of the upper lifting rod 62, a second lower traction wheel 64 on the left or right side of the lower rotating seat 63, a third handwheel adjustment structure (not shown) on the lifting arm 10 for driving the upper lifting rod 62 to move up and down, a pressure arm 65 disposed below the lifting arm 10 and along the front-rear direction, a second upper traction wheel 66 at the rear end of the pressure arm 65 and located directly above the second lower traction wheel 64, and a lower pressing structure 67 between the pressure arm 65 and the lifting arm 10. The upper lifting rod 62 is a smooth round rod, which is vertically disposed, with its lower end extending downward through the upper lifting sleeve 61. The upper lifting sleeve 61 is a circular sleeve. The lower rotating seat 63 is a rectangular block. The lower pressing structure 67 can specifically be a handwheel structure, which achieves upper pressing through a reversing gearbox. The second upper traction wheel 66 and the second lower traction wheel 64 are both arranged in the left-right direction and are located on the upper and lower sides of the corresponding thick steel bars 7, respectively. The third handwheel adjustment structure is arranged vertically, and its handwheel is located on the upper side of the lifting arm 10. The middle part of the pressure arm 65 is rotatably mounted on the lifting arm 10 through a left-right rotating shaft, and the lower pressing structure 67 is arranged in the left-right direction and presses upward against the front end of the pressure arm 65.

[0032] In this embodiment of the invention, the traction wheels (specifically including the first upper traction wheel 35, the first lower traction wheel 38, the second lower traction wheel 64, and the second upper traction wheel 66) of the lower anti-backward traction wheel pair 3 and the upper anti-backward traction wheel pair 6 are provided with anti-slip teeth on their circumferential surfaces.

[0033] Example 2

[0034] See Figure 1 Example 2 provides a traction and positioning device for truss reinforcement bars, the structure of which is basically the same as that of Example 1, except that: the traction and positioning device for truss reinforcement bars in this example also includes a rear four-hole traction plate 4, which is arranged on the frame 1 along the left-right direction. The rear four-hole traction plate 4 is located directly behind the front four-hole traction plate 2 and also has four traction holes arranged side by side on it. The traction holes on the front four-hole traction plate 2 and the rear four-hole traction plate 4 are arranged one-to-one. The lower anti-backward traction wheel pair 3 is located between the front four-hole traction plate 2 and the rear four-hole traction plate 4. Preferably, a protective plate is provided between the top of the rear four-hole traction plate 4 and the top of the front four-hole traction plate 2. The protective plate is arranged along the front-back direction and is located above the lower anti-backward traction wheel pair 3. It is a transparent plate (specifically an acrylic plate).

[0035] Example 3

[0036] See Figure 1Example 3 provides a traction and positioning device for truss reinforcement bars. Its structure is basically the same as that of Example 2, except that: in this example, two guide steel pipes 9 are provided on the rear side of the rear four-hole traction plate 4, respectively located at the two traction holes at both ends. The guide steel pipes 9 are arranged in a front-rear direction, with their front ends fixed to the rear four-hole traction plate 4 and their rear ends fixed to the frame 1. Their inner diameter is larger than the diameter of the reinforcement bars, and their length is 0.3-0.6m. The thick reinforcement bars 7 in the traction holes at both ends pass through the two guide steel pipes 9 respectively. The upper anti-backward traction wheel pair 6 is located above the rear of the guide steel pipes 9. The aforementioned structure further ensures the stability of the traction of the two thick reinforcement bars 7 below.

[0037] Example 4

[0038] See Figure 1 Example 4 provides a traction and positioning device for truss reinforcement, which is basically the same as the structure of Example 2, except that the guide wheel traction mechanism 5 in this example is located at the front end of the lifting arm 10 and is located above and behind the rear four-hole traction plate 4.

[0039] Example 5

[0040] See Figure 2 Example 5 provides a traction and positioning device for truss reinforcement bars, the structure of which is basically the same as that of Example 1, except that: in this example, the two lower anti-backward traction wheel pairs 3 share a fixed seat 36. The fixed seat 36 is located directly below the two thin steel bars 8, between the lower lifting sleeves 31 of the two lower anti-backward traction wheel pairs 3, and a sliding seat 37 is provided on each of its left and right sides.

[0041] In this embodiment of the present invention, "first" and "second" serve only as distinctions and have no other special meaning.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for pulling and positioning steel bars of a truss, comprising a frame (1), a front four-hole pulling plate (2) and a guide wheel pulling mechanism (5) above the middle of the front four-hole pulling plate (2), four pulling holes are arranged side by side on the front four-hole pulling plate (2), the guide wheel pulling mechanism (5) and the two pulling holes at both ends are used for pulling thick steel bars (7), and the two pulling holes in the middle are used for pulling thin steel bars (8); characterized in that the device further comprises an upper anti-backward pulling wheel pair (6) and two lower anti-backward pulling wheel pairs (3); the two lower anti-backward pulling wheel pairs (3) are arranged side by side and located directly behind the front four-hole pulling plate (2), are located directly behind the two pulling holes at both ends, can be adjusted leftward and rightward, and one pulling wheel on each of the two lower anti-backward pulling wheel pairs (3) can be adjusted upward and downward; the upper anti-backward pulling wheel pair (6) is located directly behind the guide wheel pulling mechanism (5), can be adjusted upward and downward, and one pulling wheel on the upper anti-backward pulling wheel pair (6) can be adjusted upward and downward; the lower anti-backward pulling wheel pairs (3) and the upper anti-backward pulling wheel pair (6) can only convey steel bars backward, and three thick steel bars (7) pass through the two lower anti-backward pulling wheel pairs (3) and the upper anti-backward pulling wheel pair (6) respectively; the diameter of the pulling holes is greater than the diameter of the steel bars, and the gap between the two pulling wheels of the guide wheel pulling mechanism (5) is greater than the diameter of the steel bars. The device further comprises a rear four-hole pulling plate (4), the front four-hole pulling plate (2) and the rear four-hole pulling plate (4) are arranged on the frame (1) along the leftward and rightward directions, the rear four-hole pulling plate (4) is located directly behind the front four-hole pulling plate (2) and also has four pulling holes arranged side by side thereon, and the pulling holes on the front four-hole pulling plate (2) and the rear four-hole pulling plate (4) are arranged one by one in correspondence; the lower anti-backward pulling wheel pairs (3) are located between the front four-hole pulling plate (2) and the rear four-hole pulling plate (4).

2. The pulling and positioning device for truss reinforcement according to claim 1, characterized in that, A protection plate is arranged between the top of the rear four-hole pulling plate (4) and the top of the front four-hole pulling plate (2); the protection plate is arranged along the frontward and rearward directions, is located above the lower anti-backward pulling wheel pairs (3), and is a transparent plate.

3. The pulling and positioning device of truss reinforcement according to claim 2, characterized in that, Two guide steel pipes (9) are arranged on the rear side of the rear four-hole pulling plate (4), and the two guide steel pipes (9) are arranged at the two pulling holes at both ends respectively; the guide steel pipes (9) are arranged along the frontward and rearward directions, the front ends of the guide steel pipes (9) are fixed on the rear four-hole pulling plate (4), the rear portions of the guide steel pipes (9) are fixed on the frame (1), the inner diameters of the guide steel pipes (9) are greater than the diameter of the steel bars; the thick steel bars (7) in the two pulling holes at both ends pass through the two guide steel pipes (9) respectively.

4. The truss rebar pulling and positioning device of claim 2, wherein, The device further comprises a lifting arm (10); the lifting arm (10) is arranged along the frontward and rearward directions and is arranged on the frame (1) in an upward and downward adjustable manner; the guide wheel pulling mechanism (5) and the upper anti-backward pulling wheel pair (6) are sequentially arranged on the lower side of the lifting arm (10), and the upper anti-backward pulling wheel pair (6) is located above the rear portion of the guide steel pipe (9).

5. The pulling and positioning device of truss reinforcement according to claim 4, characterized in that, ​ 6. The truss rebar pulling and positioning device of claim 1, wherein, The lower anti-backward traction wheel pair (3) comprises a lower lifting sleeve (31) vertically arranged on the upper side of the frame (1), a lower lifting rod (32) in the lower lifting sleeve (31), a first hand wheel adjusting structure (33) on the lower side of the frame (1) and used for driving the lower lifting rod (32) to move up and down, an upper rotating seat (34) on the upper end of the lower lifting rod (32), a first upper traction wheel (35) on the inner side of the upper rotating seat (34), a fixed seat (36) on the frame (1) and located on the inner side of the lower lifting sleeve (31), a sliding seat (37) which can slide left and right and is located on the outer side of the fixed seat (36), a first lower traction wheel (38) which is located directly below the first upper traction wheel (35) and is located on the outer side of the sliding seat (37), and a second hand wheel adjusting structure (39) between the sliding seat (37) and the frame (1) and used for driving the sliding seat (37) to move left and right; the first upper traction wheel (35) and the first lower traction wheel (38) are both arranged along the left and right directions and are respectively located on the upper and lower sides of the corresponding thick steel bars (7), the diameter of the first lower traction wheel (38) gradually decreases from the outside to the inside, and the first hand wheel adjusting structure (33) is vertically arranged; the hand wheel of the first hand wheel adjusting structure (33) is vertically arranged downward, is located on the upper side of the frame (1), and is located on the outer side of the front four-hole traction plate (2); the second hand wheel adjusting structure (39) is arranged along the left and right directions, is rotationally connected with the sliding seat (37), and the hand wheel thereof is located on the outer side of the corresponding side of the frame (1).

7. The pulling and positioning device of truss reinforcement according to claim 6, characterized in that, The two lower anti-backward traction wheel pairs (3) share one fixed seat (36); the fixed seat (36) is located directly below the two thin steel bars (8), is located between the lower lifting sleeves (31) of the two lower anti-backward traction wheel pairs (3), and is provided with one sliding seat (37) on each of the left and right sides.

8. The truss rebar pulling and positioning device of claim 5, wherein, The upper anti-backward traction wheel pair (6) comprises an upper lifting sleeve (61) vertically arranged on the lower side of the lifting arm (10), an upper lifting rod (62) in the upper lifting sleeve (61), a lower rotating seat (63) on the lower end of the upper lifting rod (62), a second lower traction wheel (64) on the left side or the right side of the lower rotating seat (63), a third hand wheel adjusting structure on the lifting arm (10) and used for driving the upper lifting rod (62) to move up and down, a pressing arm (65) on the lower side of the lifting arm (10) and arranged along the front and back directions, a second upper traction wheel (66) on the rear end of the pressing arm (65) and located directly above the second lower traction wheel (64), and a lower pressing structure (67) between the pressing arm (65) and the lifting arm (10); the second upper traction wheel (66) and the second lower traction wheel (64) are both arranged along the left and right directions and are respectively located on the upper and lower sides of the corresponding thick steel bars (7); the third hand wheel adjusting structure is vertically arranged, and the hand wheel thereof is located on the upper side of the lifting arm (10); the middle part of the pressing arm (65) is rotationally arranged on the lifting arm (10) through a rotating shaft along the left and right directions, and the lower pressing structure (67) is arranged along the left and right directions and upwardly presses the front end of the pressing arm (65).

9. The truss rebar pulling and positioning device of claim 1, wherein, The peripheries of the traction wheels of the lower anti-backward traction wheel pair (3) and the upper anti-backward traction wheel pair (6) are both provided with anti-skid teeth.

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