Steel bar binding device
By designing a retractable rebar tying device, the problems of insecure rebar tying and safety hazards inside high-section beams were solved, achieving efficient and safe rebar tying operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 五矿二十三冶建设集团有限公司
- Filing Date
- 2025-06-13
- Publication Date
- 2026-05-26
AI Technical Summary
The lack of specialized tools for rebar tying in different scenarios makes it difficult to securely tie the internal rebar of tall beams, posing safety hazards and resulting in low construction efficiency.
Design a retractable rebar tying device, including a rod structure, a snap-fit structure, and a hook structure. The device achieves telescopic adjustment through the connection of inner and outer tubes and a stress-relieving structure, adapting to the tying needs of beams with different heights and complex cross-sections.
It improves construction efficiency, reduces labor intensity and safety hazards, adapts to the task of tying reinforcement bars for high-section beams of different heights and sizes, reduces the frequency of tool replacement, and enhances the versatility and flexibility of construction equipment.
Smart Images
Figure CN224282016U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building engineering technology, and in particular to a rebar binding device. Background Technology
[0002] During the process of tying beam reinforcement, for tall beams, it is common to check for situations where the bottom reinforcement is not tied or cannot be tied (due to insufficient arm length). Traditional methods require tying the reinforcement without sealing the side formwork. This generally includes the following two tying methods: First, after the bottom formwork is erected, the reinforcement of tall beams needs to be tied. Tall beams typically have considerable height and complex reinforcement structures, with small spacing and multiple layers of reinforcement. During the tying process, it is crucial to accurately and securely tie the reinforcement in different locations and directions according to design requirements. Traditional tools are insufficient to reach some narrow areas inside tall beams, resulting in insecure tying in some areas or failure to meet design specifications. Furthermore, tying reinforcement for tall beams is often carried out at height, where space is limited, making it very inconvenient for workers. Secondly, after the beam reinforcement is tied, the side formwork and slab formwork are then enclosed. After the formwork and beam bottom slab are erected, the beam reinforcement needs to be tied. This involves the carpenters erecting the slab formwork and the reinforcement workers tying the beams working simultaneously, and the reinforcement workers are all operating on the formwork, which poses a significant safety hazard. When the slab formwork is laid and the beam side formwork is reserved for tying the beam reinforcement, the working space for the lower tying workers is limited, reducing labor efficiency. The upper slab formwork is suspended on the side of the beam because it is not supported by formwork, which also poses a significant safety hazard.
[0003] There is a lack of specialized tools for rebar tying in existing technologies, which are applicable to different scenarios. There is an urgent need for a retractable tying tool that can be used in different scenarios to ensure that tying can be carried out in areas that are inaccessible to human arms, thereby improving construction efficiency and quality and solving safety hazards. Utility Model Content
[0004] The main purpose of this utility model is to propose a rebar binding device, which aims to solve the problem that it is difficult to bind the rebars in tall cross-section beams with small gaps between them and deep inner rebars, resulting in high manual labor intensity.
[0005] To achieve the above objectives, the present invention provides a rebar tying device comprising:
[0006] The rod structure includes an outer tube and an inner tube, wherein the outer tube is sleeved on the outside of the inner tube;
[0007] A snap-fit structure is provided between the inner tube and the outer tube to fix the inner tube at any position along the axial direction of the outer tube; and,
[0008] The hook structure includes a hook body and a force-relieving structure. The force-relieving structure is installed at one end of the inner tube, and the hook body is installed on the force-relieving structure. The hook body has a fixed state and a force-relieving state on the force-relieving structure.
[0009] In the fixed state, the hook body and the inner tube are relatively fixed; in the unloading state, the hook body and the inner tube rotate relative to each other.
[0010] In one embodiment, the inner tube has a fixed end and an installation end, the stress-relieving structure is disposed on the installation end, and the snap-fit structure is disposed on the fixed end.
[0011] In one embodiment, the fixed end of the inner tube is provided with a recessed groove.
[0012] The snap-fit structure includes a driving part and an abutting block, the abutting block being installed between two opposite walls of the sinking part;
[0013] The drive unit is located in the sink section and connected to the abutment block, so as to drive the abutment block and the outer tube section to connect.
[0014] In one embodiment, a drive shaft portion is formed between the two walls of the settling tank portion;
[0015] The axis of the drive shaft and the axis of the inner tube are arranged parallel to each other in the same vertical plane, so that the drive shaft is eccentrically arranged in the sink.
[0016] One end of the abutment block is formed with an arc-shaped contact surface, which is mounted on the arc-shaped peripheral wall of the drive shaft portion;
[0017] The drive shaft section includes the drive section.
[0018] In one embodiment, the settling tank has a first mounting area with a larger radius and a second mounting area with a smaller radius.
[0019] The abutment block is located within the first installation area.
[0020] In one embodiment, the outer tube portion has a first rotational direction about its axis;
[0021] The abutment block has an arc-shaped abutment surface at one end corresponding to the inner wall of the outer tube. The radius of the arc-shaped abutment surface is gradually increased, and the radius of the arc-shaped abutment surface gradually increases in the first rotation direction.
[0022] In one embodiment, one end of the hook body located inside the inner tube is coaxially disposed with the inner tube, and a plurality of arc-shaped grooves are formed on its end, the plurality of arc-shaped grooves being evenly distributed around the end axis of the hook body.
[0023] The stress-relieving structure includes multiple abutment heads, each abutment head having an adapter end corresponding to the arc-shaped groove. The multiple abutment heads are all installed on the inner tube and each has a travel stroke in the radial direction of the inner tube. The end of the abutment head away from the adapter end is connected to the inner tube through an elastic element.
[0024] In one embodiment, the stress-relieving structure further includes a fixing ring portion, which is installed on the inner wall of the inner tube portion. The fixing ring portion has multiple sleeve portions corresponding to the multiple arc-shaped grooves, and the abutting column head is slidably installed in the inner cavity of the sleeve portion; and / or,
[0025] The elastic element is a variable diameter spring, which is installed in the inner cavity of the sleeve portion, and one end of the variable diameter spring is connected to the abutment post; and / or,
[0026] The inner tube section has a bearing component on the inner wall of one end corresponding to the mounting end, and the inner ring of the bearing component is connected to the hook body.
[0027] In one embodiment, one end of the abutment head away from the adapter end is recessed inward to form a groove, and one end of the elastic member is disposed within the groove; and / or,
[0028] The outer tube has a constricted portion formed at one end corresponding to the hook body, and the opening of the constricted portion is attached to the outer wall of the inner tube.
[0029] In one embodiment, the rebar tying device further includes an auxiliary fixing structure, which includes a limiting rod and an elastic structure. The limiting rod is slidably mounted on the inner tube in the radial direction of the inner tube. The elastic structure is mounted on the inner wall of the inner tube, and one end of the elastic structure is connected to the limiting rod. The outer tube is provided with an adapter hole corresponding to the limiting rod.
[0030] The limiting rod is positioned close to the mounting portion.
[0031] In this invention, the retractable binding structure can flexibly adjust its length according to the actual beam reinforcement cross-section height, enabling construction workers to quickly and accurately wrap and bind the binding wire to various parts of the beam reinforcement, effectively reducing binding time, significantly improving construction efficiency, and thus accelerating the overall project progress. Furthermore, during actual use, workers can reduce frequent bending and reaching movements, lowering physical burden and labor intensity, while also helping to reduce safety hazards caused by fatigue operation, ensuring the personal safety of construction workers. In addition, its retractable nature allows it to adapt to binding tasks of high-section beam reinforcement of different heights and sizes, eliminating the need for frequent changes of special tools for different specifications of beam reinforcement, improving tool versatility and flexibility, and reducing construction equipment costs. It is particularly suitable for large-scale construction projects with diverse beam reinforcement types, better meeting the needs of complex and ever-changing construction sites. Attached Figure Description
[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0033] Figure 1 A schematic diagram of the rebar binding device provided by this utility model in its stowed state;
[0034] Figure 2 for Figure 1 A schematic diagram of the steel bar binding device in a stretched state provided in the document;
[0035] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at point AA;
[0036] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure at point BB.
[0037] Explanation of icon numbers:
[0038] 100. Rebar binding device; 1. Rod structure; 11. Outer tube; 111. Closing end; 112. Adaptor hole; 12. Inner tube; 121. Sinking groove; 1211. First installation area; 1212. Second installation area; 122. Fixed end; 123. Installation end; 2. Hook structure; 21. Hook body; 211. Arc groove; 22. Force relief structure; 221. Abutting column head; 2211. Groove; 222. Fixing ring; 2221. Sleeve; 2222. Variable diameter spring; 3. Bearing component; 4. Auxiliary fixing structure; 41. Limiting rod; 42. Elastic structure; 5. Snap-fit structure; 51. Drive shaft; 52. Abutting block; 521. Arc abutting surface.
[0039] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0041] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0042] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0043] During the process of tying beam reinforcement, for tall beams, it is common to check for situations where the bottom reinforcement is not tied or cannot be tied (due to insufficient arm length). Traditional methods require tying the reinforcement without sealing the side formwork. This generally includes the following two tying methods: First, after the bottom formwork is erected, the reinforcement of tall beams needs to be tied. Tall beams typically have considerable height and complex reinforcement structures, with small spacing and multiple layers of reinforcement. During the tying process, it is crucial to accurately and securely tie the reinforcement in different locations and directions according to design requirements. Traditional tools are insufficient to reach some narrow areas inside tall beams, resulting in insecure tying in some areas or failure to meet design specifications. Furthermore, tying reinforcement for tall beams is often carried out at height, where space is limited, making it very inconvenient for workers. Secondly, after the beam reinforcement is tied, the side formwork and slab formwork are then enclosed. After the formwork and beam bottom slab are erected, the beam reinforcement needs to be tied. This involves the carpenters erecting the slab formwork and the reinforcement workers tying the beams working simultaneously, and the reinforcement workers are all operating on the formwork, which poses a significant safety hazard. When the slab formwork is laid and the beam side formwork is reserved for tying the beam reinforcement, the working space for the lower tying workers is limited, reducing labor efficiency. The upper slab formwork is suspended on the side of the beam because it is not supported by formwork, which also poses a significant safety hazard.
[0044] There is a lack of specialized tools for rebar tying in existing technologies, which are applicable to different scenarios. There is an urgent need for a retractable tying tool that can be used in different scenarios to ensure that tying can be carried out in areas that are inaccessible to human arms, thereby improving construction efficiency and quality and solving safety hazards.
[0045] This utility model proposes a rebar tying device that can directly tie beam rebars on the slab surface after all beam and slab formwork is completed, in order to achieve the binding and fixing of bottom rebars and stirrups, and web rebars and stirrups in high cross-section beams, while solving the problems of cross-operation and quality and safety hazards.
[0046] Please see Figures 1 to 2In one embodiment of this utility model, the rebar binding device 100 includes a rod structure 1, a snap-fit structure 5, and a hook structure 2. The rod structure 1 includes an outer tube 11 and an inner tube 12, with the outer tube 11 sleeved on the outside of the inner tube 12. The snap-fit structure 5 is disposed between the inner tube 12 and the outer tube 11 to fix the inner tube 12 at any position in the axial direction of the outer tube 11. The hook structure 2 includes a hook body 21 and a stress-relieving structure 22, with the stress-relieving structure 22 installed at one end of the inner tube 12 and the hook body 21 installed on the stress-relieving structure 22. The hook body 21 has a fixed state and a stress-relieving state on the stress-relieving structure 22. Corresponding to the fixed state, the hook body 21 and the inner tube 12 are relatively fixed; corresponding to the stress-relieving state, the hook body 21 and the inner tube 12 rotate relative to each other.
[0047] The structures described in the above embodiments offer good flexibility. The rod structure 1 is a telescopic structure, and the inner and outer tube sections 11 are joined together in a nested manner. In actual use, the inner tube section 12 and the outer tube section 11 can move relative to each other, resulting in a longer overall length. The overall length of the two tube sections can be adjusted to a suitable length according to actual conditions, and then the outer tube section 11 and the inner tube section 12 are connected as a whole through the snap-fit structure 5. This allows the rod structure 1 to maintain a relatively stable state at its current length. The hook structure 2 is located at one end of the inner tube section 12. During the actual wire tying process, the operator can hold the outer tube section 11 away from the hook body 21, thus creating a longer working area.
[0048] In actual rebar tying, especially for tall beams with complex reinforcement mesh structures, the spacing between rebars is small and the number of layers is high. During the tying process, it is crucial to precisely and securely tie the rebars in different locations and directions according to design requirements. Traditional tools struggle to reach narrow areas within the high-section beam, leading to insecure tying or failure to meet design specifications in some areas. Furthermore, high-section beam rebar tying is often performed at heights, where limited space makes the work extremely inconvenient for workers.
[0049] Using the structure described in the above embodiment, the rod structure 1 can be adjusted to a suitable length for the reinforcement mesh structure of the beam. During binding, first fold the binding wire structure in half, then hold the two free ends of the binding wire and insert the folded end into the side of the corresponding reinforcing bar to be bound. The operator can hold one end of the outer tube 11 and insert the binding hook body 21 into the area to be bound. Then, the folded end of the binding wire is hooked and pulled to the other side of the reinforcing bar structure to be bound using the binding hook body 21, the binding wire is pulled upwards, and the binding hook body 21 is rotated through the outer tube 11 to tighten the binding wire structures on both sides of the reinforcing bar.
[0050] The above-described method allows for the reinforcement of the bottom steel structure of tall beams by tying wires from above. This eliminates the need to dismantle the outer formwork of the reinforcement mesh and to perform tying work beneath the beam structure. This effectively improves construction efficiency and convenience during the tying process, while also ensuring the safety of workers during the tying of tall beams, demonstrating promising application prospects.
[0051] Furthermore, considering that during the tying process, the tying hook drives the tying wire to rotate, and when the rotation reaches a certain extent, it can achieve the binding effect on the rib structure. In some cases, if the rotational force is too large, it may cause the tying wire to break, and it may also cause discomfort to the operator's hands. Therefore, in the above embodiment, a force-relieving structure 22 is provided at one end of the inner tube 12. The force-relieving structure 22 is used to fix the tying hook body 21, so that the tying hook body 21 can be in a fixed state. In this state, the tying hook body 21 can achieve normal tying operation and ensure the tightness of the binding. After the rib binding is completed, if force is applied again, the force-relieving structure 22 will switch to the force-relieving state because the rotational force applied to the outer tube 11 is too large. At this time, the inner tube 12 and the tying hook body 21 can generate relative rotation, thereby relieving the excessive rotational force. However, it should be noted that the unloading state and the fixed state are switched continuously. After unloading is completed, that is, the hook body 21 can rotate around the inner tube 12 by a certain arc, and then switch to the fixed state. At this time, the rebar can continue to be tied, thus realizing the switching of continuous working states. In practical applications, the setting of the unloading structure 22 ensures the tying strength while protecting the hands of the operator.
[0052] The inner tube 12 has a fixed end 122 and an installation end 123. The stress relief structure 22 is located on the installation end 123, and the snap-fit structure 5 is located on the fixed end 122.
[0053] In actual design, considering the relatively compact reinforcement structure in high-section beams, it is preferable to use inner tube 12 and outer tube 11 as tubes with relatively small diameters. For example, the radius of inner tube 12 can be set to approximately 15mm, and the radius of outer tube 11 to approximately 19mm. After the two tube structures are fitted together, the single-sided gap is approximately 2mm. The wall thickness can be set to approximately 1mm to ensure structural strength. Specific design parameters can also be set to various specifications to adapt to different usage environments.
[0054] In terms of overall length, the distance between the end of the hook body 21 and the operating end of the outer tube 11 is set between 260mm and 420mm. Its total length can be adjusted within the above range to meet different usage needs.
[0055] Furthermore, it is conceivable that the outer tube 11 and the inner tube 12 should ideally be in a relatively closed state to prevent external sand and gravel from entering the gap between the inner tube 12 and the outer tube 11, thereby affecting the relative movement between the two structures. Therefore, it is preferable to make the end of the outer tube 11 away from the hook body 21 closed. In addition, a constriction portion 111 is provided on the end of the outer tube 11 near the hook body 21, and the opening of the constriction portion 111 is attached to the outer wall surface of the inner tube 12, thus achieving a relative seal between the outer tube 11 and the inner tube 12.
[0056] In one embodiment of this utility model, in order to minimize the overall radial distance after the inner tube portion 12 and the outer tube portion 11 are fitted together, the snap-fit structure 5 is preferably configured as an embedded structure. Specifically, a recessed groove portion 121 is provided at the fixed end 122 of the inner tube portion 12; the snap-fit structure 5 includes a driving part and an abutment block 52, the abutment block 52 being installed between two opposite groove walls of the recessed groove portion 121; the driving part is located in the recessed groove portion 121 and connected to the abutment block 52, for driving the abutment block 52 to engage with the outer tube portion 11.
[0057] In the above embodiments, such as Figure 1 , Figure 2 and Figure 4As shown, the recessed section 121 provides a certain radial space on the inner tube section 12 for installing the snap-fit structure 5. Specifically, the abutment block 52 is located between two opposite side walls of the recessed section 121. The driving unit is also located inside the recessed section 121. When the driving unit is working, it can drive the abutment block 52 to move towards the opening of the recessed section 121, so that one end of the abutment block 52 can protrude from the opening of the recessed section 121 and abut against the inner wall structure of the outer tube section 11. Then, through the frictional force formed by the abutment, the inner tube section 12 and the outer tube section 11 are connected into a whole structure. By rotating the outer tube section 11, the inner tube section 12 can be rotated synchronously to realize the wire binding operation.
[0058] Specifically, a drive shaft portion 51 is formed between the two walls of the sink 121; the axis of the drive shaft portion 51 and the axis of the inner tube portion 12 are arranged parallel in the same vertical plane, so that the drive shaft portion 51 is eccentrically arranged in the sink 121; one end of the abutment block 52 is formed with an arc-shaped contact surface, the arc-shaped contact surface is installed on the arc-shaped peripheral wall of the drive shaft portion 51, and the drive shaft portion 51 includes the drive portion.
[0059] A drive shaft 51 is formed between two opposing walls of the recessed section 121. The drive shaft 51 is arranged along the axial direction of the inner tube section 12, but is eccentrically positioned on the plane of the recessed section 121. The drive shaft 51 forms a first mounting area 1211 with a larger radius and a second mounting area 1212 with a smaller radius on the two opposing walls of the recessed section 121. The abutment block 52 is located within the first mounting area 1211. When the inner tube section 12 rotates, the drive shaft 51 rotates eccentrically simultaneously. During the rotation of the drive shaft 51, its arc-shaped sidewall rotates relative to the arc-shaped contact surface of the abutment block 52, pushing the abutment end of the abutment block 52 towards the outside of the recessed section 121, ultimately allowing the abutment block 52 to abut against the inner wall of the outer tube section 11. It should also be noted that the abutting block 52, after abutting against the inner wall of the outer tube 11, restricts the rotation of the inner tube 12. This connects the inner tube 12 and the outer tube 11 into a single structure. When a rotational force is applied to the outer tube 11, the inner tube 12 can be rotated synchronously.
[0060] It is conceivable that during the wire tying process, the tying hook body 21 is generally rotated clockwise for binding. Taking the clockwise rotation of the outer tube 11 for tying as an example, the first rotation direction of the outer tube 11 is defined as the clockwise rotation direction. Under this premise, in order to improve the fixing connection effect of the abutment block 52, it is preferable to make the end of the abutment block 52 corresponding to the inner wall of the outer tube 11 an arc-shaped abutment surface 521. The radius of the arc-shaped abutment surface 521 is gradually set, and corresponding to the first rotation direction, the radius of the arc-shaped abutment surface 521 gradually increases.
[0061] This arrangement has a significant advantage. (See reference for details on viewing from the fixed end 122 towards the mounting end 123.) Figure 1 , Figure 2 and Figure 3 Rotating the inner tube 12 counterclockwise (equivalent to rotating the outer tube 11 clockwise) causes the drive shaft 51 to rotate, which in turn moves the arc-shaped contact surface 521 of the contact block 52 toward the opening end of the recess 121. The smaller radius arc-shaped wall surface of the contact block 52 first contacts the inner wall surface of the outer tube 11. Specifically, during wire tying, the outer tube 11 also rotates clockwise. During the tying process, the hook body 21 and the tying structure are connected, meaning the mounting end 123 of the inner tube 12 is in a relatively stationary, fixed state. Rotating the outer tube 11 clockwise allows the relatively larger diameter arc-shaped contact surface 521 of the contact block 52 to move toward the inner wall of the outer tube 11. This ensures that during the clockwise rotation of the outer tube 11 for wire tying, the inner tube 12 and the mesh tube remain in a stable connection state, guaranteeing the stability of the entire rod's operating length.
[0062] When folding, taking the above reference as an example, rotating the inner tube 12 clockwise will separate the abutting block 52 from the outer tube 11, at which point the inner tube 12 can be stored inside the outer tube 11.
[0063] In the above embodiment, a rotary connection structure is used. In practical applications, the fixing structure is not limited to the above-described fixing structure for securing the inner tube 12 and the outer tube 11. For example, a spring-loaded snap-fit structure, or a groove and rib structure between the two ends of the inner tube 12 and the outer tube 11, can also connect the inner tube 12 and the outer tube 11 together and achieve anti-rotation. The appropriate configuration can be selected based on the actual production conditions.
[0064] In one embodiment of the present invention, one end of the hook body 21 located inside the inner tube 12 is coaxially disposed with the inner tube 12, and a plurality of arc-shaped grooves 211 are formed on its end. The plurality of arc-shaped grooves 211 are evenly distributed around the end axis of the hook body 21. The force relief structure 22 includes a plurality of abutment heads 221. The abutment heads 221 have an adapter end corresponding to the arc-shaped grooves 211. The plurality of abutment heads 221 are all installed on the inner tube 12 and each has a movement stroke in the radial direction of the inner tube 12. The end of the abutment head 221 away from the adapter end is connected to the inner tube 12 through an elastic member.
[0065] like Figure 2 and Figure 3 As shown, in the fixed state, the arc-shaped end of the abutment head 221 corresponds to the arc-shaped groove 211 at the end of the hook body 21. Multiple fixed structures are formed by the arc-shaped groove 211 and the abutment head 221, and they are evenly distributed around the axis of the inner tube 12. During actual operation, multiple abutment heads 221 apply force simultaneously, providing a large circumferential rotational resistance to meet the actual requirements of the wire rotational force. When the applied rotational force is large, the force between the two abutting arc-shaped structures is large, which will overcome the elastic force of the elastic element and cause the abutment head 221 to move towards the inner wall of the inner tube 12. When one end of the abutment head 221 separates from the arc-shaped groove 211, the system switches to the unloading state. The applied rotational force will also drive the outer tube 11 and the inner tube 12 to rotate, but the hook body 21 can remain in its current stationary state, thus achieving unloading. When the abutment head 221 rotates to contact the next arc-shaped groove 211, it then switches to the fixed state. This allows for continuous wire binding operations while unloading the force.
[0066] The stress-relieving structure 22 further includes a fixing ring portion 222, which is installed on the inner wall of the inner tube portion 12. The fixing ring portion 222 has multiple sleeve portions 2221 corresponding to the multiple arc-shaped grooves 211. The abutting head 221 is slidably installed in the inner cavity of the sleeve portion 2221. In the above embodiment, the sleeve portion 2221 on the fixing ring portion 222 serves as a motion guide structure for the abutting head 221, thereby ensuring the stability of the abutting head 221 during its movement.
[0067] Furthermore, because the inner diameter of the inner tube 12 is relatively small, its internal space is limited. To ensure the fixing effect of the abutment head 221 while minimizing the space occupied by the stress-relieving structure 22 in the radial direction of the inner tube 12, in this embodiment, the elastic element is set as a variable-diameter spring 2222. The variable-diameter spring 2222 is installed in the inner cavity of the sleeve portion 2221, and one end of the variable-diameter spring 2222 is connected to the abutment head 221. Additionally, a recessed groove 2211 can be formed at the end of the abutment head 221 away from the adapter end, with one end of the elastic element located within the groove 2211. Through this structural design, the space occupied by the stress-relieving structure 22 in the inner tube 12 can be minimized, making the overall structure more feasible.
[0068] In order to improve the installation stability of the hook body 21 on the inner tube 12, a bearing 3 is provided on the inner wall of one end of the inner tube 12 corresponding to the mounting end 123, and the inner ring of the bearing 3 is connected to the hook body 21.
[0069] The inner tube 12 and the outer tube 11 are fitted together to prevent the inner tube 12 from coming out of the outer tube 11 when folded. The rebar binding device 100 also includes an auxiliary fixing structure 4, which includes a limiting rod 41 and an elastic structure 42. The limiting rod 41 is slidably mounted on the inner tube 12 in the radial direction. The elastic structure 42 is mounted on the inner wall of the inner tube 12, and one end of the elastic structure is connected to the limiting rod 41. The outer tube 11 is provided with an adapter hole 112 corresponding to the limiting rod 41. The limiting rod 41 is located near the mounting part.
[0070] When the inner tube 12 is retracted into the inner cavity of the outer tube 11, one end of the limiting rod 41 can correspond to the adapter hole 112. Under the action of the elastic structure 42, the limiting rod 41 can be driven to pass through the adapter hole 112, thereby restricting the relative axial movement between the inner tube 12 and the outer tube 11, which can greatly improve the stability of the entire structure.
[0071] Furthermore, it is conceivable that during the aforementioned wire-tying process, since the snap-fit structure 5 is a unidirectional limiting and fixing structure, certain requirements exist during operation. In this embodiment, considering the above issues, an auxiliary fixing structure 4 similar to the one described above can be provided at the fixed end 122 of the inner tube 12, and a corresponding hole structure can be provided at the closing part 111 of the outer tube 11. With this structure, when the outer tube 11 and the inner tube 12 are at their maximum length, one end of the inner tube 12 and the outer tube 11 can be connected through the auxiliary fixing structure 4. At this time, wire-tying can be performed whether the outer tube 11 is rotated clockwise or counterclockwise.
[0072] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A reinforcing bar tying apparatus characterized by comprising: include: The rod structure includes an outer tube and an inner tube, wherein the outer tube is sleeved on the outside of the inner tube; A snap-fit structure is provided between the inner tube and the outer tube to fix the inner tube at any position along the axial direction of the outer tube; and, The hook structure includes a hook body and a force-relieving structure. The force-relieving structure is installed at one end of the inner tube, and the hook body is installed on the force-relieving structure. The hook body has a fixed state and a force-relieving state on the force-relieving structure. In the fixed state, the hook body and the inner tube are relatively fixed; in the unloading state, the hook body and the inner tube rotate relative to each other.
2. The rebar tying device of claim 1, wherein, The inner tube has a fixed end and an installation end. The stress-relieving structure is located at the installation end, and the snap-fit structure is located at the fixed end.
3. The rebar tying apparatus of claim 2, wherein, The fixed end of the inner tube is provided with a groove. The snap-fit structure includes a driving part and an abutting block, the abutting block being installed between two opposite walls of the sinking part; The drive unit is located in the sink section and connected to the abutment block, so as to drive the abutment block and the outer tube section to connect.
4. The rebar tying apparatus of claim 3, wherein, A drive shaft is formed between the two walls of the settling tank. The axis of the drive shaft and the axis of the inner tube are arranged parallel to each other in the same vertical plane, so that the drive shaft is eccentrically arranged in the sink. One end of the abutment block is formed with an arc-shaped contact surface, which is mounted on the arc-shaped peripheral wall of the drive shaft portion; The drive shaft section includes the drive section.
5. The rebar tying apparatus of claim 4, wherein, The settling tank contains a first mounting area with a larger radius and a second mounting area with a smaller radius. The abutment block is located within the first installation area.
6. The rebar tying apparatus of claim 4, wherein, The outer tube has a first direction of rotation about its axis; The abutment block has an arc-shaped abutment surface at one end corresponding to the inner wall of the outer tube. The radius of the arc-shaped abutment surface is gradually increased, and the radius of the arc-shaped abutment surface gradually increases in the first rotation direction.
7. The rebar tying apparatus of claim 2, wherein, The hook body is located at one end inside the inner tube and is coaxially arranged with the inner tube. Multiple arc-shaped grooves are formed on its end, and the multiple arc-shaped grooves are evenly distributed around the end axis of the hook body. The stress-relieving structure includes multiple abutment heads, each abutment head having an adapter end corresponding to the arc-shaped groove. The multiple abutment heads are all installed on the inner tube and each has a travel stroke in the radial direction of the inner tube. The end of the abutment head away from the adapter end is connected to the inner tube through an elastic element.
8. The rebar tying apparatus of claim 7, wherein, The stress-relieving structure further includes a fixing ring portion, which is installed on the inner wall of the inner tube portion. The fixing ring portion has multiple sleeve portions corresponding to the multiple arc-shaped grooves, and the abutting column head is slidably installed in the inner cavity of the sleeve portion; and / or... The elastic element is a variable diameter spring, which is installed in the inner cavity of the sleeve portion, and one end of the variable diameter spring is connected to the abutment post; and / or, The inner tube section has a bearing component on the inner wall of one end corresponding to the mounting end, and the inner ring of the bearing component is connected to the hook body.
9. The rebar tying apparatus of claim 7, wherein, The end of the abutting post away from the adapter end is recessed inward to form a groove, and one end of the elastic member is disposed within the groove; and / or The outer tube has a constricted portion formed at one end corresponding to the hook body, and the opening of the constricted portion is attached to the outer wall of the inner tube.
10. The rebar tying apparatus of claim 2, wherein, The rebar binding device also includes an auxiliary fixing structure, which includes a limiting rod and an elastic structure. The limiting rod is slidably installed on the inner tube in the radial direction of the inner tube. The elastic structure is installed on the inner wall of the inner tube, and one end of the elastic structure is connected to the limiting rod. The outer tube is provided with an adapter hole corresponding to the limiting rod. The limiting rod is positioned close to the mounting portion.