CN118881176A - A steel bar binding tool and a binding method using the tool - Google Patents

Abstract

The application relates to a steel bar binding tool and a binding method using the tool, which relates to the technical field of steel bar binding, and comprises a handle and a hook connected below the handle, wherein the length of the handle is longer than that from a top steel bar to a bottom steel bar, the handle and the hook are hollow and communicated with each other, the handle and the hook are internally provided with a guide cylinder for limiting the movement track of the steel wire, the steel wire passes through the head of the handle and passes out of the end part of the hook, and the handle is internally provided with a conveying system for conveying the steel wire and a cutting assembly for cutting the steel wire. The application has the effect of being convenient for binding the beam bottom reinforcing steel bars.

Description

A steel bar binding tool and a binding method using the tool

Technical Field

The present application relates to the technical field of steel bar binding, and in particular to a steel bar binding tool and a binding method using the tool.

Background Art

At present, a large amount of steel bars are usually needed in the construction process, which brings about heavy steel bar tying work. In the actual work process, the steel bars are laid and tied from bottom to top.

A Chinese patent with announcement number CN217581299U discloses a steel bar binding tool, including a box, a lead screw, a nut seat and a first spring; the two side walls of the box are provided with vertically arranged guide slots; the lead screw is arranged in the box, one end of the lead screw is rotatably connected to the inner wall of the box, and the other end of the lead screw extends to the outside of the box and is connected to a hook; the nut seat is sleeved on the lead screw, and pull plates are fixed on the two side walls of the nut seat respectively, and the two pull plates are correspondingly slidably mounted in the two guide slots, and the end of the pull plate away from the nut seat extends outside the guide slot; the first spring is sleeved on the outside of the lead screw, one end of the first spring is connected to the nut seat, and the other end of the first spring is connected to the inner wall of the box. When binding steel bars, there is no need to twist the wrist, and only the two pull plates need to be pulled upward to drive the hook to rotate, so that the steel bars can be quickly bound, the binding process is convenient, the labor intensity of the operators is reduced, and the binding efficiency is improved.

In the process of construction engineering, there is often a situation where the bottom steel bars of the beam are not tied or tied in place. At this time, it is difficult to tie the steel wires by using the above tools or the steel bar tying machine. The main problems are:

1. Since the steel bars are relatively dense, especially in the dense steel bar area, the gaps between the steel bars are relatively small, and it is difficult for the arm and the steel bar binding machine to pass through the gaps between the steel bars and send the steel wire to the steel bars at the bottom of the beam;

2. Since there is a certain height difference between the bottom steel bars and the top steel bars, existing tools are often unable to be used due to insufficient length.

Summary of the invention

In order to solve the problem that the steel bars at the bottom of the beam are not tied or are not tied properly, the present application provides a steel bar tying tool and a tying method using the tool.

In the first aspect, the present application provides a steel bar binding tool adopting the following technical solution:

A steel bar binding tool, comprising a handle and a hook connected to the bottom of the handle, characterized in that: the length of the handle is greater than the length from the top steel bar to the bottom steel bar, the handle and the hook are hollow and interconnected, the handle and the hook are provided with a guide cylinder for limiting the movement trajectory of the steel wire, the steel wire passes through the handle head and out of the hook end, and the handle is provided with a conveying system for conveying the steel wire and a cutting component for cutting the steel wire.

Preferably, the conveying system includes two feed rollers rotatably connected to the handle and a feed motor driving the two feed rollers to rotate towards each other. The steel wire passes between the feed rollers and comes out from the end of the hook. The concave outer wall of the hook is provided with a plurality of feed grooves along its own bending direction. After the steel wire comes out from the end of the hook, it enters one of the feed grooves and continues to move. Several of the feed grooves are inclined in the same direction. The steel wire enters different feed grooves in turn and completes several turns of winding on the steel bar node.

Preferably, the hook is a retractable hook, which includes a fixed hook connected to the end of the handle, a sliding hook slidably connected to the fixed hook, and a feeding hook slidably connected to the sliding hook. The fixed hook, the sliding hook and the feeding hook are coaxial. The guide cylinder located in the hook is a telescopic cylinder and is coaxial with the fixed hook. A driving mechanism for driving the feeding hook and the sliding hook to rotate relative to the fixed hook is provided in the handle.

Preferably, the lower surfaces of the fixed hook, sliding hook and feeding hook are smoothly connected, and driving grooves are provided on the handle, fixed hook, sliding hook and feeding hook. The driving grooves on the handle, fixed hook, sliding hook and feeding hook are interconnected, and the driving mechanism includes a driving belt which is slidably arranged in the driving groove and is rigidly arranged in the length direction. One end of the driving belt is fixed on the feeding hook, and a driving component which makes the driving belt move and pushes and pulls the feeding hook to move is provided on the handle at the other end of the driving belt.

Preferably, the driving assembly includes a driving block slidably connected in the driving slot, a driving spring fixed in the driving slot, one end of the driving spring is fixed to the top of the driving slot, the other end of the driving spring is fixed to the driving block, the driving belt is fixed to the driving block, and the driving spring is always in a compressed state.

Preferably, the driving belt includes a plurality of driving joints, each of which includes a driving ball, a driving rod connected to both sides of the driving ball, the driving rod being a telescopic rod with a spring inside, a sliding ball fixed to the end of the driving rod to prevent the driving belt from escaping from the driving groove, a connecting rod fixed to the driving ball, a connecting ball fixed to the end of the connecting rod, and a connecting groove for clamping the connecting ball is provided on the driving ball.

Preferably, the fixed hook is rotatably connected to the end of the handle, a driving gear ring is coaxially fixed in the fixed hook, a connecting gear meshing with the driving gear ring is rotatably connected in the fixed hook, a driving motor for rotating the connecting gear is fixed in the handle, a clamping groove perpendicular to the driving groove is opened on the handle, a clamping rod is rotatably connected to the driving block, the clamping rod rotates into the clamping groove to prevent the feeding hook from moving toward the sliding hook, and when the fixed hook rotates relative to the handle, the connecting ball located there is disengaged from the corresponding driving ball and returns to the corresponding driving groove after rotating an integer multiple of 360°.

Preferably, the cutting assembly includes a cutter slidably connected in the handle and a support block opposite to the cutter, a steel wire passes between the cutter and the support block, a driven rack is fixed on the cutter, a driving gear is rotatably connected in the handle, a driving rack is slidably connected in the handle, the driving rack and the driven rack are meshed with the driving gear on both sides of the driving gear, an operating rod is rotatably connected in the handle via a rotating shaft, the operating rod rotating shaft is close to the driving rack, an operating block extending outside the handle and facilitating the pushing of the operating rod to rotate is fixed at one end of the operating rod away from the driving rack, an abutment block is fixed on the driving rack, which abuts against the operating rod and drives the driving rack to slide during the rotation of the operating rod, and a cutting spring is fixed in the handle for pulling the cutter to move in a direction away from the support block.

In a second aspect, the present application also provides a tying method of the steel bar tying tool, comprising the following steps:

S1. Extend the handle to the position of the steel bars at the bottom of the beam and hook it on the node where the steel bars at the bottom of the beam need to be tied;

S2, the feeding roller sends the steel wire downward, and the steel wire is wound around the steel bar node for several turns under the action of the feeding trough;

S3, pressing the operating block drives the operating rod to rotate, and under the action of the driving rack and the driving gear, the driven rack and the cutter are driven to move, and the cutter and the support block work together to cut the wire;

S4, rotating the clamping rod to rotate it into the clamping groove, and then the staff acts on the handle to disengage the hook from the steel bar node and hook it into several turns of steel wire, and the driving motor drives the driving gear ring to rotate, thereby driving the fixed hook, the sliding hook and the feeding hook to rotate, and knotting several turns of steel wire on the steel bar node;

S5. The hook is detached from the wire and the knot is tied.

Preferably, in step S2, when the bottom steel bar of the beam is close to the ground and the hook cannot be passed directly, the feeding hook and the sliding hook are first stored in the fixed hook, the bottom of the fixed hook is abutted against the ground, and then the feeding hook and the sliding hook are passed through the bottom of the bottom steel bar of the beam, and then the steel wire is fed;

In step S4, in order to separate the hook from the beam bottom steel bar, the feeding hook and the sliding hook are first stored in the fixed hook.

In summary, the present application includes at least one of the following beneficial technical effects:

When using the binding tool, the worker first extends the handle to the position of the bottom steel bar of the beam, hooks the hook on the node of the bottom steel bar of the beam, then feeds the material through the conveying system, and wraps the steel wire around the node of the bottom steel bar of the beam for several turns, cuts the steel wire, removes the hook, and hooks the hook into several turns of steel wire, and then rotates the hook to tie the knot at the node of the bottom steel bar of the beam. When the distance between the bottom steel bar of the beam and the ground is small, the end of the discharge hook is at a distance from the bottom of the hook, so that the hook cannot pass through the gap between the ground and the bottom steel bar of the beam. First, the sliding hook and the feeding hook are stored in the fixed hook, and the bottom of the fixed hook is against the ground, and then the feeding hook and the sliding hook are driven to move outward from the fixed hook, so that the entire hook is hooked to the node of the bottom steel bar of the beam, which is convenient for feeding the steel wire.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application.

FIG. 2 is a schematic diagram showing the structure of the conveying system and the cutting assembly.

Figure 3 is a schematic diagram of the connection structure of the drive belt and the hook.

FIG. 4 is a schematic diagram of the connection structure of the drive block, the drive spring and the clamping rod on the handle.

FIG. 5 is a schematic diagram of the structure of the driving section.

FIG. 6 is an enlarged structural schematic diagram of part A in FIG. 2 .

Explanation of the reference numerals: 1. handle; 2. hook; 3. guide cylinder; 4. feed roller; 5. feed trough; 6. fixed hook; 7. sliding hook; 8. feed hook; 9. drive groove; 10. drive belt; 11. drive block; 12. drive spring; 13. support block; 14. drive section; 15. drive ball; 16. drive rod; 17. sliding ball; 18. connecting rod; 19. connecting ball; 20. connecting groove; 21. snap-in groove; 22. snap-in rod; 23. drive gear ring; 24. connecting gear; 25. cutter; 26. driven rack; 27. drive gear; 28. drive rack; 29. operating lever; 30. operating block; 31. cutting spring; 32. abutment block.

DETAILED DESCRIPTION

The present application is further described in detail below in conjunction with Figures 1-6.

An embodiment of the present application discloses a steel bar binding tool, referring to Figures 1 and 2, comprising a handle 1 and a hook 2 connected to the bottom of the handle 1, wherein the length of the handle 1 is greater than the length from the top steel bar to the bottom steel bar, and the diameter of the handle 1 gradually increases from one end of the hook 2 toward the end away from the hook 2, the handle 1 and the hook 2 are hollow inside and connected to each other, and a guide cylinder 3 for limiting the movement trajectory of the steel wire is arranged inside the handle 1 and the hook 2, and the steel wire passes through the head of the handle 1 and out from the end of the hook 2.

Referring to Figures 1 and 2, a conveying system for conveying steel wire and a cutting assembly for cutting the steel wire are provided in the handle 1. The conveying system includes two feed rollers 4 rotatably connected in the handle 1. The two feed rollers 4 are rubber rollers and are parallel to each other. A feed motor is fixed in the handle 1. The output shaft of the feed motor is coaxially fixed to one of the feed rollers 4. Under the action of the feed motor, the two feed rollers 4 rotate in opposite directions through friction. The steel wire enters from the head of the handle 1 and passes between the two feed rollers 4. Under the action of the feed rollers 4 and a plurality of guide cylinders 3, it moves toward the hook 2.

2 and 3 , the concave outer wall of the hook 2 is provided with a plurality of feeding grooves 5 along its own bending direction. After the steel wire passes through the end of the hook 2, it enters one of the feeding grooves 5 and continues to move under the action of the feeding roller 4. The plurality of feeding grooves 5 are inclined in the same direction. After the steel wire is fed out of the first feeding groove 5, it enters the adjacent second feeding groove 5 and enters the adjacent different feeding grooves 5 in turn, thereby realizing several turns of winding on the steel bar node at the bottom of the beam.

2 and 3 , the hook 2 is a retractable hook, which includes a fixed hook 6 rotatably connected to the end of the handle 1, a sliding hook 7 slidably connected inside the fixed hook 6, and a feeding hook 8 slidably connected inside the sliding hook 7. The fixed hook 6, the sliding hook 7 and the feeding hook 8 are coaxial, and the guide cylinder 3 located inside the hook 2 is a retractable cylinder and is coaxial with the fixed hook 6.

2 and 3, a driving mechanism for driving the feeding hook 8 and the sliding hook 7 to rotate relative to the fixed hook 6 is provided in the handle 1, the lower surfaces of the fixed hook 6, the sliding hook 7 and the feeding hook 8 are smoothly connected, and a driving groove 9 is provided on the handle 1, the fixed hook 6, the sliding hook 7 and the feeding hook 8. The driving grooves 9 on the handle 1, the fixed hook 6, the sliding hook 7 and the feeding hook 8 are interconnected, and the driving mechanism includes a driving belt 10 slidably arranged in the driving groove 9, the driving belt 10 slides along the length direction of the driving groove 9 and the driving belt 10 is rigidly arranged in the length direction, the end of the driving belt 10 is fixed on the feeding hook 8, and a driving component for moving the driving belt 10 and pushing and pulling the feeding hook 8 is provided on the handle 1.

3 and 4, the driving assembly includes a driving block 11 slidably connected in the driving slot 9, and a driving spring 12 fixed in the driving slot 9, one end of the driving spring 12 is fixed to the top of the driving slot 9, and the other end of the driving spring 12 is fixed to the driving block 11, and the driving belt 10 is fixed to the driving block 11, and the driving spring 12 is always in a compressed state. Since the driving spring 12 is always in a compressed state, it is ensured that the feeding hook 8 and the sliding hook 7 are always located outside the fixed hook 6, ensuring that the whole is in a hook 2 state. When the feeding hook 8 and the sliding hook 7 need to be stored in the fixed hook 6, the staff can act on the driving block 11 to further compress the driving spring 12.

3 and 5, the driving belt 10 includes a plurality of driving sections 14 spliced end to end, the driving section 14 includes a driving ball 15, a coaxial driving rod 16 connected to both sides of the driving ball 15, the driving rod 16 is a telescopic rod with a spring inside, and a sliding ball 17 is fixed to the end of the driving rod 16 to prevent the driving belt 10 from escaping from the driving groove 9. Since the fixed hook 6, the sliding hook 7 and the feeding hook 8 are in a sleeve relationship, the width of the driving groove 9 on the fixed hook 6 is greater than the width of the driving groove 9 on the sliding hook 7, and the width of the driving groove 9 on the sliding hook 7 is greater than the width of the driving groove 9 on the sliding hook 7. Due to the width of the driving groove 9 on the feeding hook 8, in order to ensure that the driving section 14 on the driving belt 10 can slide smoothly on the fixed hook 6, the sliding hook 7 and the feeding hook 8, a smooth guide surface is set in the driving groove 9 on the fixed hook 6 and the feeding hook 8. When the driving section 14 follows the smooth guide surface, it enters from the driving groove 9 on the fixed hook 6 to the driving groove 9 on the sliding hook 7 in sequence, and finally enters the driving groove 9 on the feeding hook 8. In this process, the spring in the driving rod 16 is compressed step by step to ensure that the driving section 14 can move smoothly.

3 and 5, a connecting rod 18 is fixed to the driving ball 15, the connecting rod 18 is perpendicular to the driving rod 16, a connecting ball 19 is fixed to the end of the connecting rod 18, a connecting groove 20 for clamping the connecting ball 19 is provided on the driving ball 15, the connecting groove 20 penetrates the driving ball 15, and the openings at both ends of the connecting groove 20 are larger than the opening in the middle, and the connecting ball 19 can pass through the connecting groove 20. In the process of rotating the fixing hook 6 relative to the handle 1, the connecting ball 19 located at the joint of the handle 1 and the fixing hook 6 is separated from the corresponding driving ball 15 as the fixing hook 6 rotates, and returns to the corresponding connecting groove 20 after rotating to an integral multiple of 360°.

3, 4 and 5, in order to ensure that the position of the driving belt 10 does not change during the rotation of the fixed hook 6 relative to the handle 1, that is, the driving ball 15 located at the node position of the handle 1 and the fixed hook 6 does not change position, a clamping groove 21 perpendicular to the driving groove 9 is opened on the handle 1, and a clamping rod 22 is rotatably connected to the driving block 11. By rotating the clamping rod 22, the clamping rod 22 is rotated into the clamping groove 21. At this time, the position of the driving spring 12 is locked, and the driving belt 10 cannot slide in the driving groove 9, ensuring that the connecting ball 19 that rotates with the fixed hook 6 can return to the connecting groove 20 on the corresponding driving ball 15.

Referring to Figures 1 and 3, a driving toothed ring 23 is coaxially fixed in the fixed hook 6, and a connecting gear 24 meshing with the driving toothed ring 23 is rotatably connected in the fixed hook 6. A driving motor for rotating the connecting gear 24 is fixed in the handle 1, and the connecting gear 24 is driven by the driving motor to rotate, thereby driving the driving toothed ring 23 to rotate, and then driving the fixed hook 6 to rotate. After the steel wire is wound around the bottom steel bar of the beam for several turns, the hook 2 is hooked in the several turns of steel wire, and the several turns of steel wire form a spiral structure on the bottom steel bar of the beam through the rotation of the fixed hook 6, so as to achieve the bundling of the bottom steel bar of the beam. During the winding process, the force is mainly concentrated on the sliding hook 7, and the friction between the fixed hook 6, the sliding hook 7 and the feeding hook 8 makes the fixed hook 6, the sliding hook 7 and the feeding hook 8 relatively consistent in position.

2 and 6, the cutting assembly includes a cutter 25 slidably connected in the handle 1, a support block 13 facing the cutter 25, a steel wire passes between the cutter 25 and the support block 13, a driven rack 26 is fixed on the cutter 25, a driving gear 27 is rotatably connected in the handle 1, a driving rack 28 is slidably connected in the handle 1, the driving rack 28 and the driven rack 26 are meshed with the driving gear 27 on both sides of the driving gear 27, an operating rod 29 is rotatably connected in the handle 1 through a rotating shaft, the operating rod 29 rotating shaft is close to the driving rack 28, an operating block 30 is fixed on the end of the operating rod 29 away from the driving rack 28, and the operating block 30 extends to the outside of the handle 1, and by pressing The operating block 30 drives the operating rod 29 to rotate, and an abutment block 32 is fixed on the driving rack 28, and the abutment block 32 abuts against the operating rod 29. When the operating block 30 is pressed, the operating block 30 drives the operating rod 29 to rotate. During the rotation, the operating rod 29 drives the abutment block 32 to slide, and the abutment block 32 drives the driving gear 27 to move, thereby driving the driving gear 27 to rotate. During the rotation of the driving gear 27, the driven rack 26 meshing with it drives the cutter 25 to move in a direction close to the support block 13. The cutter 25 and the support block 13 work together to cut the wire. A cutting spring 31 is fixed in the handle to pull the cutter 25 to move in a direction away from the support block 13.

The present application also discloses a steel bar tying method, comprising the following steps:

S1, extend the handle 1 to the position of the steel bars at the bottom of the beam, and hook the hook 2 on the node where the steel bars at the bottom of the beam need to be tied;

S2, the feed roller 4 rotates under the action of the feed motor, the steel wire moves downward under the action of the feed roller 4 and the guide cylinder 3, and passes through the end of the hook 2, and the steel wire is wound around the steel bar node for several turns under the action of the feed trough 5;

S3, pressing the operating block 30, thereby driving the operating rod 29 to rotate, and under the action of the driving rack 28 and the driving gear 27, the driven rack 26 and the cutter 25 are driven to move, and the cutter 25 and the support block 13 work together to cut the steel wire;

S4, rotate the clamping rod 22 to rotate it into the clamping groove 21, then the staff acts on the handle 1 to disengage the hook 2 from the steel bar node and hook it into several turns of steel wire, the driving motor drives the driving gear ring 23 to rotate, thereby driving the fixed hook 6, the sliding hook 7 and the feeding hook 8 to rotate, and several turns of steel wire are knotted on the steel bar node;

S5, hook 2 is detached from the wire, and the knot is completed.

When the steel bars at the bottom of the beam are close to the ground, there is a distance between the end of the feeding hook 8 and the bottom of the hook 2, so that the hook 2 cannot directly pass through the gap between the steel bars at the bottom of the beam and the ground. The staff can first store the feeding hook 8 and the sliding hook 7 in the fixed hook 6, and the bottom of the fixed hook 6 is in contact with the ground. Then, the feeding hook 8 and the sliding hook 7 pass through the bottom of the steel bars at the bottom of the beam, and then feed the steel wire. After the feeding is completed, the steel bars are cut off. In order to make the hook 2 detach from the steel bars at the bottom of the beam, the feeding hook 8 and the sliding hook 7 are first stored in the fixed hook 6. After taking out the hook 2, the sliding hook 7 and the feeding hook 8 are moved toward the outside of the fixed hook 6. After forming a complete hook 2, it is hung in several turns of steel wire and the above steps S4 and S5 are repeated.

The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A steel bar binding tool, comprising a handle (1) and a hook (2) connected to the bottom of the handle (1), characterized in that: the length of the handle (1) is greater than the length from the top steel bar to the bottom steel bar, the handle (1) and the hook (2) are hollow inside and connected to each other, the handle (1) and the hook (2) are provided with a guide cylinder (3) for limiting the movement trajectory of the steel wire, the steel wire passes through the head of the handle (1) and passes out from the end of the hook (2), and the handle (1) is provided with a conveying system for conveying the steel wire and a cutting component for cutting the steel wire. 2. A steel bar binding tool according to claim 1, characterized in that: the conveying system includes two feed rollers (4) rotatably connected to the handle (1) and a feed motor driving the two feed rollers (4) to rotate towards each other, the steel wire passes through between the feed rollers (4) and comes out from the end of the hook (2), and the concave outer wall of the hook (2) is provided with a plurality of feed grooves (5) along its own bending direction. After the steel wire comes out from the end of the hook (2), it enters one of the feed grooves (5) and continues to move. The plurality of feed grooves (5) are inclined in the same direction, and the steel wire enters different feed grooves (5) in turn and completes several turns of winding on the steel bar node. 3. A steel bar binding tool according to claim 2, characterized in that: the hook (2) is a retractable hook, the hook (2) includes a fixed hook (6) connected to the end of the handle (1), a sliding hook (7) slidably connected to the fixed hook (6), and a feeding hook (8) slidably connected to the sliding hook (7), the fixed hook (6), the sliding hook (7) and the feeding hook (8) are coaxial, the guide cylinder (3) located in the hook (2) is a telescopic cylinder and is coaxial with the fixed hook (6), and a driving mechanism is provided in the handle (1) for driving the feeding hook (8) and the sliding hook (7) to rotate relative to the fixed hook (6). 4. A steel bar binding tool according to claim 3, characterized in that: the lower surfaces of the fixed hook (6), the sliding hook (7) and the feeding hook (8) are smoothly connected, and a driving groove (9) is provided on the handle (1), the fixed hook (6), the sliding hook (7) and the feeding hook (8), and the driving grooves (9) on the handle (1), the fixed hook (6), the sliding hook (7) and the feeding hook (8) are interconnected, and the driving mechanism includes a driving belt (10) which is slidably arranged in the driving groove (9) and is rigidly arranged in the length direction, one end of the driving belt (10) is fixed on the feeding hook (8), and a driving component is provided on the handle (1) at the other end of the driving belt (10) to move the driving belt (10) and push and pull the feeding hook (8) to move. 5. A steel bar binding tool according to claim 4, characterized in that: the driving assembly includes a driving block (11) slidably connected in the driving groove (9), and a driving spring (12) fixed in the driving groove (9), one end of the driving spring (12) is fixed to the top of the driving groove (9), and the other end of the driving spring (12) is fixed on the driving block (11), the driving belt (10) is fixed on the driving block (11), and the driving spring (12) is always in a compressed state. 6. A steel bar binding tool according to claim 5, characterized in that: the driving belt (10) includes a plurality of driving sections (14), the driving section (14) includes a driving ball (15), and a driving rod (16) connected to both sides of the driving ball (15), the driving rod (16) is a telescopic rod with a spring inside, and a sliding ball (17) is fixed to the end of the driving rod (16) to prevent the driving belt (10) from escaping from the driving groove (9), a connecting rod (18) is fixed on the driving ball (15), and a connecting ball (19) is fixed on the end of the connecting rod (18), and a connecting groove (20) for clamping the connecting ball (19) is provided on the driving ball (15). 7. A steel bar binding tool according to claim 6, characterized in that: the fixed hook (6) is rotatably connected to the end of the handle (1), a driving gear ring (23) is coaxially fixed in the fixed hook (6), a connecting gear (24) meshing with the driving gear ring (23) is rotatably connected in the fixed hook (6), a driving motor for rotating the connecting gear (24) is fixed in the handle (1), a clamping groove (21) perpendicular to the driving groove (9) is opened on the handle (1), a clamping rod (22) is rotatably connected to the driving block (11), the clamping rod (22) rotates into the clamping groove (21) to prevent the feeding hook (8) from moving toward the sliding hook (7), when the fixed hook (6) rotates relative to the handle (1), the connecting ball (19) located therein disengages from the corresponding driving ball (15), and returns to the corresponding driving groove (9) after rotating an integer multiple of 360°. 8. A steel bar binding tool according to claim 7, characterized in that: the cutting assembly comprises a cutter (25) slidably connected in the handle (1), a support block (13) directly opposite to the cutter (25), the steel wire passes between the cutter (25) and the support block (13), a driven rack (26) is fixed on the cutter (25), a driving gear (27) is rotatably connected in the handle (1), a driving rack (28) is slidably connected in the handle (1), the driving rack (28) and the driven rack (26) are meshed with the driving gear (27) on both sides of the driving gear (27), and the handle An operating rod (29) is rotatably connected to the handle (1) via a rotating shaft, the rotating shaft of the operating rod (29) is close to the driving rack (28), an operating block (30) extending outside the handle (1) and convenient for pushing the operating rod (29) to rotate is fixed at one end of the operating rod (29) away from the driving rack (28), an abutment block (32) is fixed on the driving rack (28) and abuts against the operating rod (29) and drives the driving rack (28) to slide during the rotation of the operating rod (29), and a cutting spring (31) is fixed in the handle (1) for pulling the cutter (25) to move in a direction away from the support block (13). 9. A tying method using the steel bar tying tool according to claim 8, characterized in that it comprises the following steps: S1. Extend the handle (1) to the position of the steel bars at the bottom of the beam and hook it on the node where the steel bars at the bottom of the beam need to be tied; S2, the feeding roller (4) feeds the steel wire downward, and the steel wire is wound around the steel bar node for several turns under the action of the feeding trough (5); S3, pressing the operating block (30) drives the operating rod (29) to rotate, and under the action of the driving rack (28) and the driving gear (27), the driven rack (26) and the cutter (25) are driven to move, and the cutter (25) and the supporting block (13) work together to cut the steel wire; S4, rotating the clamping rod (22) to rotate it into the clamping groove (21), and then the staff acts on the handle (1) to disengage the hook (2) from the steel bar node and hook it into several turns of steel wire, and the driving motor drives the driving gear ring (23) to rotate, thereby driving the fixed hook (6), the sliding hook (7) and the feeding hook (8) to rotate, and the several turns of steel wire are knotted on the steel bar node; S5. The hook (2) is detached from the wire, and the knot is tied. 10. The steel bar binding method according to claim 9 is characterized in that: in step S2, when the bottom steel bar of the beam is close to the ground and the hook (2) cannot pass through directly, the feeding hook (8) and the sliding hook (7) are first stored in the fixed hook (6), the bottom of the fixed hook (6) is abutted against the ground, and then the feeding hook (8) and the sliding hook (7) are passed through the bottom of the bottom steel bar of the beam, and then the steel wire is fed; In step S4, in order to separate the hook (2) from the beam bottom steel bar, the feeding hook (8) and the sliding hook (7) are first stored in the fixed hook (6).