Semi-automatic steel bar tying device

Abstract

The present invention provides a semi-automatic steel bar wire tying device, which includes: a spiral rising cylindrical hand lever; a wire tying hook tip, which is arranged at the wire tying end of the spiral rising cylindrical hand lever and is used to hook the wire; a sliding sleeve, which is sleeved on the outer circumference of the spiral rising cylindrical hand lever, and the sliding sleeve is transmission-connected to the outer wall of the spiral rising cylindrical hand lever. The present invention hooks the two ends of the wire in an annular shape through the wire tying hook tip. The steel bar worker only needs to lift the sliding sleeve upward, and the spiral rising cylindrical hand lever drives the wire tying hook tip to rotate upward, thereby driving the wire to automatically complete the twisting and fixing work. Compared with ordinary wire tying hooks, it is simpler to operate, greatly improving the quality and efficiency of steel bar splicing. It is simple to operate, and the steel bar wire can be twisted and fixed by lifting and lowering, which greatly reduces the operator's wrist strain and improves production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of steel bar connection, in particular to a semi-automatic steel bar wire tying device. Background Art

[0002] There are lap joint, welding and sleeve connection technologies for steel bar connection. For construction projects where the diameter of steel bar is less than 25mm, lap joint is generally adopted.

[0003] The existing steel bar wire hooks are generally simple in design, with low binding efficiency. The binding relies entirely on manual work by the steel bar workers. The quality of steel bar binding is related to the quality of the steel bar workers. There are problems such as insufficient number of wire twists and loose steel bar connections. Moreover, long-term steel bar binding requires the steel bar workers to rotate their wrists to drive the wire hooks to tighten the wires, which causes certain strain on the steel bar workers' wrists. Summary of the Invention

[0004] In view of this, the present invention proposes a semi-automatic steel bar wire tying device, which aims to solve the problem that the existing steel bar wire tying hooks rely on manual tying by steel workers, resulting in unstable steel bar tying quality and causing certain strain on the steel workers' wrists.

[0005] The present invention proposes a semi-automatic steel bar wire tying device, which includes: a spirally rising cylindrical hand rod; a wire tying hook tip, which is arranged at the wire tying end of the spirally rising cylindrical hand rod and is used to hook the wire tying; a sliding sleeve, which is sleeved on the outer circumference of the spirally rising cylindrical hand rod, and the sliding sleeve is transmission-connected to the outer wall of the spirally rising cylindrical hand rod, and is used to move upward along the axial direction of the spirally rising cylindrical hand rod under the action of external force, and drive the spirally rising cylindrical hand rod to rotate, thereby driving the wire tying hook tip and the wire hooked by the wire tying hook tip to rotate, and when the external force is removed, the sliding sleeve can move downward along the axial direction of the spirally rising cylindrical hand rod relative to the spirally rising cylindrical hand rod to twist the wire again to achieve the twisting and tying work.

[0006] Furthermore, in the above-mentioned semi-automatic steel bar tying device, the sliding sleeve includes: an inner sleeve; an outer sleeve, which is sleeved on the outer circumference of the inner sleeve, and the outer sleeve is connected to the inner sleeve through a transmission member, and when the outer sleeve moves along the axial direction of the inner sleeve under the action of an external force, after the outer sleeve moves upward by a preset length relative to the inner sleeve, the transmission member applies a force to the inner sleeve so that the inner sleeve is tightly attached to the outer wall of the spiral rising cylindrical hand rod, moves upward synchronously with the outer sleeve, and drives the spiral rising cylindrical hand rod to rotate, and after the external force is removed, after the outer sleeve moves downward by a preset length relative to the inner sleeve under the action of gravity, the transmission member removes the force applied to the inner sleeve so that there is a gap between the inner sleeve and the outer wall of the spiral rising cylindrical hand rod, thereby allowing the inner sleeve to slide downward along the outer circumference of the spiral rising cylindrical hand rod under the action of gravity.

[0007] Furthermore, in the above-mentioned semi-automatic steel bar wire tying device, the inner sleeve includes: two half-cylinder structures; wherein the two half-cylinder structures are arranged relative to each other and are connected in a manner that can be merged and separated, and are used to be merged and arranged to form a spiral cylinder, or separated with a gap to achieve linear sliding relative to the spiral rising cylindrical hand rod; the outer wall of the spiral rising cylindrical hand rod is provided with a first spiral structure, and the inner wall of the spiral cylinder is provided with a second spiral structure adapted to the first spiral structure, so that when the two half-cylinder structures are merged, the second spiral structure is transmission-connected to the first spiral structure, thereby converting the linear motion of the spiral cylinder into the rotational motion of the spiral rising cylindrical hand rod.

[0008] Furthermore, in the above-mentioned semi-automatic steel bar wire tying device, the two docking wall surfaces of the two semi-cylinder structures are provided with rotating holes, and a telescopic connecting rod is provided between the two semi-cylinder structures at the rotating holes, and its two ends are respectively connected to the two inner walls of the rotating holes of the two semi-cylinder structures, for telescoping with the distance between the two semi-cylinder structures; the outer wall of the telescopic connecting rod is also sleeved with an adjusting spring, and its two ends are respectively connected to the two semi-cylinder structures. When the two semi-cylinder structures are merged, the adjusting spring is compressed to apply a reset force to the two semi-cylinder structures, so that after the transmission member cancels the force on the inner sleeve, the two semi-cylinder structures move toward each other under the action of the reset force to separate, thereby realizing linear sliding relative to the spiral rising cylindrical hand rod.

[0009] Furthermore, in the above-mentioned semi-automatic steel bar wire tying device, a first limiting support structure is provided on the outer wall of the inner sleeve, and a second limiting support structure is provided on the inner wall of the outer sleeve, and the two are spaced and arranged relative to each other; the transmission member is a spherical structure, which is slidably arranged between the inner sleeve and the outer sleeve, and the transmission member is located between the first limiting support structure and the second limiting support structure; the transmission member slides upward relative to the inner sleeve along with the second limiting support structure of the outer sleeve to contact the first limiting support structure, and gradually moves upward to be stuck between the first limiting support structure and the second limiting support structure, so that The inner sleeve performs synchronous axial movement with the outer sleeve, and the transmission member also applies an extrusion force to the inner sleeve and the outer sleeve, so that the inner wall of the inner sleeve is tightly attached to the outer wall of the spirally rising cylindrical hand rod throughout the entire circumference, thereby realizing spiral transmission between the inner sleeve and the spirally rising cylindrical hand rod; after the external force on the outer sleeve is removed, the second limiting support structure moves downward relative to the inner sleeve with the outer sleeve under the action of gravity, and the transmission member falls under the action of gravity, and the transmission member removes the extrusion force on the inner sleeve and the outer sleeve, thereby realizing relative linear motion between the inner sleeve and the spirally rising cylindrical hand rod.

[0010] Furthermore, in the above-mentioned semi-automatic steel bar wire tying device, the outer wall of the inner sleeve is provided with a guide structure along its axial direction, and / or the inner wall of the outer sleeve is provided with a guide structure for guiding the sliding of the transmission member along the axial direction of the inner sleeve.

[0011] Furthermore, in the above-mentioned semi-automatic steel bar wire tying device, the first limiting support structure is a ring-built triangular pyramid structure, and its tip is set downward, which is used to guide the transmission part to gradually squeeze the inner sleeve; and / or, the second limiting support structure is a ring-built triangular pyramid structure, and its tip is set downward.

[0012] Furthermore, in the above-mentioned semi-automatic steel bar wire tying device, a double helix structure is provided on the outer wall of the spirally rising cylindrical hand rod.

[0013] Furthermore, in the above-mentioned semi-automatic steel bar wire tying device, the hand-held end of the spirally rising cylindrical hand rod is provided with a hand rod lock.

[0014] Furthermore, in the above-mentioned semi-automatic steel bar wire tying device, the wire tying hook tip and / or the hand rod clamp are fixed to the end of the spiral rising cylindrical hand rod by welding.

[0015] The semi-automatic steel bar wire tying device provided by the present invention hooks the ring-shaped ends of the wire tying wire through the wire tying hook tip, and is sleeved on the outer circumference of the spiral rising cylindrical hand rod through the sliding sleeve. Under the action of external force, the sliding sleeve moves upward along the axial direction of the spiral rising cylindrical hand rod, and drives the spiral rising cylindrical hand rod to rotate, thereby driving the wire tying hook tip and the wire tying hook tip to rotate, thereby realizing the twisting of the wire tying wire, and when the external force is removed, the sliding sleeve can move downward in a straight line along the axial direction of the spiral rising cylindrical hand rod relative to the spiral rising cylindrical hand rod, that is, during the second process, the spiral rising cylindrical hand rod does not rotate, and the sliding sleeve can be reset to the initial position, thereby enabling the sliding sleeve to move upward again to twist the wire tying wire again, thereby realizing the twisting of the wire tying wire multiple times, thereby realizing the twisting and fixing of the wire tying wire. That is, the circular wire tie passes through the butted rebars, and the wire tie hook is used to hook the rings at both ends of the wire tie. The rebar worker only needs to lift the sliding sleeve upward, and the spiral rising cylindrical hand lever drives the wire tie hook tip to rotate upward, thereby driving the wire tie to automatically complete the tightening and fixing work. Compared with ordinary wire tie hooks, it is simpler to operate, greatly improving the quality and efficiency of rebar splicing. The operation is simple, and the rebar tie can be tightened and fixed by lifting and lowering, which greatly reduces the operator's wrist strain and improves production efficiency. It solves the problem that the existing rebar tie hooks rely on the rebar worker to tie manually, resulting in unstable rebar tying quality and causing certain strain on the rebar worker's wrist. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0017] Figure 1 A schematic structural diagram of a semi-automatic steel bar tying device provided in an embodiment of the present invention;

[0018] Figure 2 A schematic structural diagram of a spiral rising cylindrical handle provided in an embodiment of the present invention;

[0019] Figure 3 A cross-sectional view of a sliding sleeve provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, unless there is a conflict, the embodiments of the present disclosure and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] See also Figures 1 to 3 , which shows the preferred structure of the semi-automatic steel bar wire tying device provided by the embodiment of the present invention. As shown in the figure, the device includes: a spiral rising cylindrical hand lever 1, a wire tying hook tip 2 and a sliding sleeve 3; wherein,

[0022] The wire hook tip 2 is arranged on the wire end of the spiral rising cylindrical handle 1 (such as Figure 1 The lower left end shown in the figure) is used to hook the wire. Specifically, the wire hook tip 2 can be fixed to the wire end of the spiral rising cylindrical hand rod 1 by welding, and can pass through the butted steel bars and hook the rings at both ends of the wire, that is, hook the wire that is sleeved on the outer periphery of the butted steel bars and has a ring structure. In this embodiment, the outer wall of the spiral rising cylindrical hand rod 1 is provided with a first spiral structure 11, which is used to rotate under the driving action of the sliding sleeve 3 when the sliding sleeve 3 slides relative to the spiral rising cylindrical hand rod 1 along the axial direction of the spiral rising cylindrical hand rod 1. In this embodiment, a double helical structure is provided on the outer wall of the spiral rising cylindrical hand rod, that is, the first spiral structure 11 is a double helical structure to ensure the stability of the rotation of the spiral rising cylindrical hand rod 1. The handheld end of the spiral rising cylindrical hand rod 1 (such as Figure 1 The upper right end of the handle 1 is provided with a handle stop 12 for limiting the position of the sliding sleeve 3 and making it easy to hold and tie the wire. The handle stop 12 can be fixed to the handheld end of the spiral rising cylindrical handle 1 by welding, but can also be fixed by other means, which are not limited in this embodiment.

[0023] The sliding sleeve 3 is sleeved on the outer circumference of the spiral rising cylindrical hand rod 1, and the sliding sleeve 3 is transmission-connected to the outer wall of the spiral rising cylindrical hand rod 1, and is used to move upward along the axial direction of the spiral rising cylindrical hand rod 1 under the action of an external force, and drive the spiral rising cylindrical hand rod 1 to rotate, thereby driving the wire hook tip 2 and the wire hooked by the wire hook tip 2 to rotate, thereby realizing the twisting of the wire, and when the external force is removed, the sliding sleeve 3 can move downward along the axial direction of the spiral rising cylindrical hand rod 1 relative to the spiral rising cylindrical hand rod 1 to reset to the initial position, and then twist the wire again to realize the twisting and fixing work. Specifically, the sliding sleeve 3 is coaxially sleeved on the outside of the spiral rising cylindrical hand rod 1 along the axial direction of the spiral rising cylindrical hand rod 1, and the sliding sleeve 3 is transmission-connected to the outer wall of the spiral rising cylindrical hand rod 1, and under the action of an external force, the sliding sleeve 3 moves upward along the axial direction of the spiral rising cylindrical hand rod 1 (such as Figure 3 When the tongs 1 are in the downward direction, the tongs 3 are in the downward direction, and the tongs 3 are in the upward direction, so that the tongs 3 can be fixed to the tongs 1 again.

[0024] Continue to see Figure 3 When the outer sleeve 32 is moved downwardly by a preset length relative to the inner sleeve 31, the transmission member 33 will remove the force acting on the inner sleeve 31, so that there is a gap between the inner sleeve 31 and the outer wall of the spiral rising cylindrical hand rod 1, thereby allowing the inner sleeve 31 to slide downwardly along the outer wall of the spiral rising cylindrical hand rod 1 under the action of gravity.

[0025] Specifically, the outer sleeve 32 can be an integrated sleeve structure with a hollow interior and open at both ends, so as to be sleeved on the outside of the inner sleeve 31; there is a gap between the outer sleeve 32 and the inner sleeve 31, and the transmission member 33 is slidably arranged between the outer sleeve 32 and the inner sleeve 31 along the axial direction of the outer sleeve 32, for switching the state of the inner sleeve 31 so that the inner sleeve 31 is in a close contact state or a separated state. In the close contact state, the inner wall of the inner sleeve 31 is in close contact with the outer wall of the spiral rising cylindrical hand rod 1, and the two are combined to form a ball screw mechanism to convert the sliding, i.e., linear motion, of the inner sleeve 31 into rotation of the spiral rising cylindrical hand rod 1, thereby realizing wire binding, and in the separated state, there is a gap between the inner wall of the inner sleeve 31 and the outer wall of the spiral rising cylindrical hand rod 1, so that the inner sleeve 31 can slide relatively on the spiral rising cylindrical hand rod 1. In this embodiment, the transmission member 33 can be a spherical structure, which is slidably disposed between the inner sleeve 31 and the outer sleeve 32. When the outer sleeve 32 slides upward relative to the inner sleeve 31 to a preset position, the transmission member 33 also slides upward to the preset position. The transmission member 33 can apply a force to the inner sleeve 31 to switch the inner sleeve 31 to a close contact state. When the outer sleeve 32 slides downward relative to the inner sleeve 31, the transmission member 33 also moves downward, canceling the force applied to the inner sleeve 31, so that the inner sleeve 31 can switch to a separated state. There can be multiple transmission members 33 and they are evenly arranged along the circumference of the inner sleeve 31 to ensure uniform force application. The diameter of the spherical structure is slightly smaller than the distance between the inner and outer sleeves.

[0026] In this embodiment, in order to realize the state switching of the inner sleeve 31, preferably, a first limiting support structure 312 is provided on the outer wall of the inner sleeve 31, and a second limiting support structure 321 is provided on the inner wall of the outer sleeve 32, and the two are spaced and arranged relative to each other; the transmission member 33 is a spherical structure, which is slidably arranged between the inner sleeve 31 and the outer sleeve 32, and the transmission member 33 is located between the first limiting support structure 312 and the second limiting support structure 321; the transmission member 33 slides upward relative to the inner sleeve 31 along with the second limiting support structure 321 of the outer sleeve 32 to contact the first limiting support structure 312, and gradually moves upward to be stuck in the first limiting support structure 312 and the second limiting support structure The support structures 322 are between the support structures 322, so that the inner sleeve 31 can perform synchronous axial movement with the outer sleeve 32, and the transmission member 33 also applies an extrusion force to the inner sleeve 31 and the outer sleeve 32, so that the inner wall of the inner sleeve 31 is tightly attached to the outer wall of the spirally rising cylindrical hand rod 1 throughout the entire circumference, thereby realizing the spiral transmission between the inner sleeve 31 and the spirally rising cylindrical hand rod 1; after the external force on the outer sleeve 32 is removed, the second limiting support structure 322 moves downward relative to the inner sleeve 31 with the outer sleeve 32 under the action of gravity, and the transmission member 33 falls under the action of gravity, and the transmission member 33 removes the extrusion force on the inner sleeve 31 and the outer sleeve 32, thereby realizing the relative linear motion between the inner sleeve 31 and the spirally rising cylindrical hand rod 1.

[0027] Specifically, the first limiting support structure 312 and the second limiting support structure 321 limit the transmission member 33, and the second limiting support structure 321 guides the transmission member 33, so that the transmission member 33 can slide up and down with the second limiting support structure 321, so that it can move relative to the inner sleeve 31, that is, the first limiting support structure 312, and then it can approach the first limiting support structure 312 and squeeze the first limiting support structure 312 to switch the inner sleeve 31 to a close-fitting state, thereby realizing the spiral transmission between the inner sleeve 31 and the spiral rising cylindrical hand rod 1, and can move away from the first limiting support structure 312, for example, there is a gap between the inner sleeve 31 and the first limiting support structure 312, so that the inner sleeve 31 can switch to a separated state, thereby realizing relative linear motion between the inner sleeve 31 and the spiral rising cylindrical hand rod 1, thereby realizing the resetting of the inner sleeve 31. The first position-limiting support structure 312 is a triangular pyramid structure with its tip facing downward, and is used to guide the transmission member 33 to gradually squeeze the inner sleeve 31; and / or the second position-limiting support structure 321 is a triangular pyramid structure with its tip facing downward, and supports the transmission member 33 through the top support, so that the transmission member 33 slides along the second position-limiting support structure 321. In this embodiment, the outer wall of the inner sleeve 31 is provided with a guide structure along its axial direction, and / or the inner wall of the outer sleeve 32 is provided with a guide structure, and is used to guide the transmission member 33 to slide along the axial direction of the inner sleeve.

[0028] In this embodiment, the inner sleeve 31 includes: two half-cylinder structures 311; wherein, the two half-cylinder structures 311 are arranged relative to each other and are connected in a manner that can be merged and separated, and are used to be merged and arranged to form a spiral cylinder, or separated with a gap to achieve linear sliding relative to the spiral rising cylindrical hand rod 1; the outer wall of the spiral rising cylindrical hand rod 1 is provided with a first spiral structure 11, and the inner wall of the spiral cylinder is provided with a second spiral structure adapted to the first spiral structure 11, so that when the two half-cylinder structures 311 are merged, the second spiral structure is transmission-connected to the first spiral structure 11, thereby converting the linear motion of the spiral cylinder into the rotational motion of the spiral rising cylindrical hand rod 1.

[0029] Specifically, the inner sleeve 31 is cast to fit the part of the spiral rising cylindrical handle 1, and the inner sleeve 31 is cut in half vertically to obtain two half-cylinder structures 311, so that the inner walls of the two half-cylinder structures 311 are provided with a spiral structure that is compatible with the first spiral structure 11. The two butting walls of the two semi-cylinder structures 311 are both provided with a rotating hole 3111, and a telescopic connecting rod (not shown in the figure) is provided between the two semi-cylinder structures 311 at the rotating hole 3111, and its two ends are respectively connected to the inner walls of the two rotating holes 3111 of the two semi-cylinder structures 311, which is used to extend and retract according to the distance between the two semi-cylinder structures 311; the outer wall of the telescopic connecting rod is also sleeved with an adjusting spring (not shown in the figure), and its two ends are respectively connected to the two semi-cylinder structures 311. When the two semi-cylinder structures 311 are merged, the adjusting spring is compressed to apply a reset force to the two semi-cylinder structures 311, so that after the transmission member 33 cancels the force on the inner sleeve 31, the two semi-cylinder structures 311 move toward each other under the action of the reset force to separate, thereby realizing linear sliding relative to the spiral ascending cylindrical hand rod 1. The inner sleeve 31 can be separated from the center by a 2mm gap by symmetrically setting two rotation holes 3111 in the upper and lower mid-sections of the sidewalls of the two half-cylinder structures 311. An adjustment spring is connected between the two rotation holes 3111, which is then inserted into the rotation holes 3111 to prevent shear forces from severing the adjustment spring during movement of the inner sleeve 31.

[0030] The installation process of the semi-automatic steel bar wire tying device is as follows: first assemble the inner sleeve 31 on the spiral rising cylindrical hand rod 1, then insert the outer sleeve 32 into the spiral rising cylindrical hand rod 1, put in four spheres as transmission parts 33 when the inner and outer sleeves are connected, and then weld the wire tying hook tip 2 and the hand rod stop 12.

[0031] The operating principle of the semi-automatic steel bar wire binding device:

[0032] In its natural state, the sliding sleeve 3 is located at the lower end of the spirally rising cylindrical handle 1. The adjustment spring installed on the inner wall of the inner sleeve 31 causes the two half-cylinder structures 311 to separate by a 2mm gap. When the operator lifts the sliding sleeve 3, the outer sleeve 32 moves upward, and the second limit support structure 321 on the outer sleeve 32 drives the sphere, i.e., the transmission member 33, to move upward, then engage the first limit support structure 312 on the inner sleeve 31. The sphere squeezes the inner sleeve 31, causing the inner sleeve 31 to merge by a 2mm gap, so that the inner sleeve 31 fits the spirally rising cylindrical handle 1, thereby driving the wire hook tip 2 to rotate. When the operator naturally lowers the sliding sleeve 3, the sphere naturally falls, and the two half-cylinder structures 311 are naturally separated by a 2mm gap from the middle by the adjustment spring. During the falling process, the inner sleeve 31 does not fit the spirally rising cylindrical handle 1, and the sliding sleeve 3 can fall freely due to natural gravity. The operator only needs to lift it up 1-2 times to complete the steel bar connection and binding work.

[0033] When the cam 3 is in the state of being rotated, the cam 3 is in the state of being rotated, and the cam 3 is in the state of being rotated. That is, the circular tie wire passes through the butted rebars, and the tie wire hook is used to hook the rings at both ends of the tie wire. The rebar worker only needs to lift the sliding sleeve 3 upward, and the spirally rising cylindrical hand lever 1 drives the tie wire hook tip 2 to rotate upward, thereby driving the tie wire to automatically complete the tightening and fixing work. Compared with ordinary tie wire hooks, it is simpler to operate, greatly improving the quality and efficiency of rebar splicing. It is simple to operate, and the rebar tie wire can be tightened and fixed by simply lifting and lowering, which greatly reduces the operator's wrist strain and improves production efficiency. It solves the problem that the existing rebar tie wire hook relies on the rebar worker to tie manually, resulting in unstable rebar tying quality and causing certain strain on the rebar worker's wrist.

[0034] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0035] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A semi-automatic steel bar wire tying device, characterized in that: include: Spiral rising cylindrical hand lever; A wire hook tip is provided at the wire end of the spirally ascending cylindrical handle and is used to hook the wire; The sliding sleeve is sleeved on the outer circumference of the spiral rising cylindrical hand rod, and the sliding sleeve is transmission connected to the outer wall of the spiral rising cylindrical hand rod, and is used to move upward along the axial direction of the spiral rising cylindrical hand rod under the action of an external force, and drive the spiral rising cylindrical hand rod to rotate, thereby driving the wire hook tip and the wire hooked by the wire hook tip to rotate, and when the external force is removed, the sliding sleeve can move downward along the axial direction of the spiral rising cylindrical hand rod relative to the spiral rising cylindrical hand rod to screw the wire again to achieve the twisting and tying work; The sliding sleeve comprises: an inner sleeve having a close fit state and a separate state; An outer sleeve, sleeved on the outer circumference of the inner sleeve; The inner sleeve comprises: two half-sleeve structures; A first position-limiting support structure is provided on the outer wall of the inner sleeve, and a second position-limiting support structure is provided on the inner wall of the outer sleeve, with the two being spaced apart and arranged opposite to each other; The transmission member is a spherical structure, which is slidably disposed between the inner sleeve and the outer sleeve, and the transmission member is located between the first position-limiting support structure and the second position-limiting support structure; The transmission member slides upward with the second limiting support structure of the outer sleeve relative to the inner sleeve to contact the first limiting support structure, and gradually moves upward to be stuck between the first limiting support structure and the second limiting support structure, so that the inner sleeve can perform synchronous axial movement with the outer sleeve. The transmission member also applies an extrusion force to the inner sleeve and the outer sleeve, thereby making the inner wall of the inner sleeve tightly adhere to the outer wall of the spirally rising cylindrical hand rod throughout the entire circumference, thereby realizing spiral transmission between the inner sleeve and the spirally rising cylindrical hand rod; After the external force on the outer sleeve is removed, the second limiting support structure moves downward with the outer sleeve relative to the inner sleeve under the action of gravity, and the transmission member falls under the action of gravity. The transmission member removes the extrusion force on the inner sleeve and the outer sleeve, thereby realizing relative linear motion between the inner sleeve and the spirally rising cylindrical hand rod.

2. The semi-automatic steel bar tying device according to claim 1, characterized in that: The outer sleeve is connected to the inner sleeve by a transmission member, and when the outer sleeve moves axially along the inner sleeve under the action of an external force, after the outer sleeve moves upward by a preset length relative to the inner sleeve, the transmission member applies a force to the inner sleeve to switch the inner sleeve to a close-fitting state, so as to be close to the outer wall of the spirally rising cylindrical hand rod, and move upward synchronously with the outer sleeve, and drive the spirally rising cylindrical hand rod to rotate, and after the external force is removed, after the outer sleeve moves downward by a preset length relative to the inner sleeve under the action of gravity, the transmission member removes the force on the inner sleeve to switch the inner sleeve to a separated state, so as to have a gap with the outer wall of the spirally rising cylindrical hand rod, thereby allowing the inner sleeve to slide downward along the outer circumference of the spirally rising cylindrical hand rod under the action of gravity.

3. The semi-automatic steel bar tying device according to claim 2, characterized in that: The two half-cylinder structures are arranged opposite to each other and connected in a manner that allows them to be combined and separated, and are used to be combined to form a spiral cylinder, or separated to have a gap to achieve linear sliding relative to the spiral rising cylindrical handle; The outer wall of the spiral rising cylindrical hand rod is provided with a first spiral structure, and the inner wall of the spiral cylinder is provided with a second spiral structure adapted to the first spiral structure, so that when the two half-cylinder structures are merged, the second spiral structure is transmission-connected with the first spiral structure, thereby converting the linear motion of the spiral cylinder into the rotational motion of the spiral rising cylindrical hand rod.

4. The semi-automatic steel bar tying device according to claim 3, characterized in that: The two butting walls of the two semi-cylinder structures are both provided with a rotation hole, and a telescopic connecting rod is provided between the two semi-cylinder structures at the rotation hole, with its two ends respectively connected to the inner walls of the two rotation holes of the two semi-cylinder structures, for telescoping according to the distance between the two semi-cylinder structures; The outer wall of the telescopic connecting rod is also sleeved with an adjustment spring, the two ends of which are respectively connected to the two semi-cylinder structures. When the two semi-cylinder structures are merged, the adjustment spring is compressed to apply a reset force to the two semi-cylinder structures, so that after the transmission member cancels the force acting on the inner sleeve, the two semi-cylinder structures move toward each other under the action of the reset force to separate, thereby achieving linear sliding relative to the spirally rising cylindrical hand rod.

5. The semi-automatic steel bar tying device according to claim 1, characterized in that: The outer wall of the inner sleeve is provided with a guide structure along its axial direction, and / or the inner wall of the outer sleeve is provided with a guide structure for guiding the sliding of the transmission member along the axial direction of the inner sleeve.

6. The semi-automatic steel bar tying device according to claim 1, characterized in that: The first position-limiting support structure is a triangular pyramid structure with its tip facing downward, and is used to guide the transmission member to gradually squeeze the inner sleeve; and / or, The second position-limiting support structure is in the form of a triangular pyramid with its tip facing downward.

7. The semi-automatic steel bar wire tying device according to any one of claims 1 to 6, characterized in that: A double helix structure is provided on the outer wall of the spirally ascending cylindrical handle.

8. The semi-automatic steel bar wire tying device according to any one of claims 1 to 6, characterized in that: The hand-held end of the spirally ascending cylindrical hand lever is provided with a hand lever latch.

9. The semi-automatic steel bar tying device according to claim 8, characterized in that: The wire hook tip and / or the hand rod clamp are fixed to the end of the spiral rising cylindrical hand rod by welding.

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