A portable hand crimping tool

Abstract

This utility model discloses a portable manual hoop bending tool, relating to the field of construction engineering equipment technology. It includes an arc-shaped mounting plate and a handle. The arc-shaped mounting plate has a semi-cylindrical shell structure, with its inner surface designed to fit against the outer wall of the main shaft of the building. Through the enclosing structure formed by the arc-shaped mounting plate and the anti-slip guard arm, this utility model can directly utilize the main reinforcing bars of beams and columns on the construction site as a stable rotation axis, completely solving the technical problems of traditional tools lacking fulcrums and being prone to slippage. This greatly improves operational safety and bending accuracy. Combined with the built-in auxiliary hoop bending wheel, sliding friction is converted into rolling friction, significantly reducing resistance during bending. This not only saves effort and is highly efficient but also prevents the surface of the hoop from being scratched by the tool. Furthermore, the multiple sets of wheel grooves of different widths allow it to adapt to the processing of various specifications of hoop, making it highly versatile.

Description

Technical Field

[0001] This utility model relates to the field of construction equipment technology, and in particular to a portable manual hoop bending tool. Background Technology

[0002] In the construction of reinforced concrete structures, stirrups, as important shear and torsional resisting components, are directly related to the structural safety and stability of the building. Normally, stirrups are prefabricated in batches using large machinery in the rebar processing shed and then transported to the work surface for binding and installation. However, in actual construction sites, situations often arise where, due to design changes, handling of construction errors, or omissions of existing stirrups, it is necessary to add stirrups to the already bound main bars or correct the angle of the installed stirrups in narrow spaces such as beam-column joints. In addition, in some special working conditions such as high-altitude operations or limited space, large stirrup bending equipment cannot reach the work point, and prefabricated stirrups are often difficult to fit smoothly due to the positional deviation of the main bars. This requires construction personnel to perform on-site manual bending operations directly on the vertical or horizontal main bars on the work surface.

[0003] However, most existing manual hoop bending tools are simple and crude in structure, such as simple wrenches or homemade sleeves. These tools lack a stable fulcrum during operation, and operators often need to hold the tool with one hand and use the other hand or body part to assist in fixing the rebar. This not only leads to extremely high labor intensity and is prone to causing muscle strain, but also, due to the lack of a standardized rotation positioning center, the angle of the bent hoop is difficult to control, and it is easy to cause twisting and deformation that does not meet the acceptance standards. Especially when dealing with larger diameter rebar, simple tools are prone to slipping off the rebar due to excessive force. In high-altitude working environments, this can easily cause safety accidents such as tools falling and injuring people or operators losing their balance and falling. Therefore, there is an urgent need for a portable hoop bending device that can use the main structure on site as a stable fulcrum, is labor-saving to operate, and is safe and reliable. To this end, a portable manual hoop bending tool is provided to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a portable manual hoop bending tool to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a portable manual hoop bending tool, comprising an arc-shaped mounting plate and a grip handle. The arc-shaped mounting plate has a semi-cylindrical shell structure, and its inner side is used to fit against the outer wall of the main axis of the building. An upper fixed mounting block is provided on the outer wall of the arc-shaped mounting plate, and the grip handle is connected to the upper fixed mounting block. An installation groove is provided on the inner side wall of the arc-shaped mounting plate, and an auxiliary hoop bending wheel for abutting the hoop reinforcement is rotatably installed in the installation groove. An anti-slip guard arm is connected to one side of the arc-shaped mounting plate, and the anti-slip guard arm cooperates with the arc-shaped mounting plate to form a limiting space for surrounding the main axis of the building.

[0006] As a further improvement of this utility model: the auxiliary bending wheel is rotatably installed in the mounting groove of the arc-shaped mounting plate through the central rotating shaft, and the two ends of the central rotating shaft are fixed to the side wall of the mounting groove.

[0007] As a further improvement of this utility model: several sets of auxiliary bending wheels are arranged side by side along the axial direction of the central axis, and the groove width of each set of auxiliary bending wheels is different to accommodate stirrups of different diameters.

[0008] As a further improvement of this utility model, one end of the anti-slip guard arm is rotatably connected to the side of the arc-shaped mounting plate, and the other end is detachably connected to the edge of the arc-shaped mounting plate through a locking component.

[0009] As a further improvement of this utility model, the locking component includes a positioning hole opened on the edge of the arc-shaped mounting plate, and a handle rod movably installed on the other end of the anti-slip guard arm.

[0010] As a further embodiment of this utility model: a support spring is fitted on the handle rod, and the two ends of the support spring are fixedly connected to the end protrusion of the handle rod and the outer side of the anti-slip guard, respectively. When the support spring is in a naturally extended state without being subjected to external force, the end of the handle rod extends out and inserts into the positioning hole and fills the hole.

[0011] As a further embodiment of this utility model: a connecting thread head is fixedly provided at the bottom of the grip handle, and a threaded blind hole that mates with the connecting thread head is opened at the top of the upper fixed mounting block. The grip handle is threadedly connected to the upper fixed mounting block through the connecting thread head.

[0012] As a further improvement of this utility model, the outer surface of the grip handle is provided with anti-slip knurling or covered with a rubber anti-slip sleeve.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model utilizes an enclosed structure formed by an arc-shaped mounting plate and an anti-slip guard arm. It can directly use the main reinforcing bars of beams and columns on the construction site as a stable rotation axis, completely solving the technical problems of traditional tools lacking fulcrums and being prone to slippage. This greatly improves the safety of operation and bending accuracy. With the built-in auxiliary bending wheel, sliding friction is converted into rolling friction, significantly reducing the resistance during bending. This not only saves effort and is highly efficient, but also prevents the surface of the stirrup from being scratched by the tool. At the same time, the design of multiple wheel grooves of different widths allows it to adapt to the processing of stirrups of various specifications, making it highly versatile. In addition, the detachable handle design and the unique spring self-locking mechanism ensure that the tool has excellent portability and safety for high-altitude operations while ensuring a stable connection. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the upper fixed mounting block in this utility model;

[0017] Figure 3 This is a schematic diagram of the auxiliary bending hoop wheel in this utility model;

[0018] Figure 4 This is a schematic diagram of the positioning socket in this utility model;

[0019] Figure 5 This is a schematic diagram of the structure at point A in this utility model.

[0020] In the diagram: 1. Arc-shaped mounting plate; 2. Upper fixed mounting block; 3. Handle; 4. Connecting threaded head; 5. Central pivot; 6. Auxiliary bending wheel; 7. Anti-slip guard arm; 8. Positioning insertion hole; 9. Hand-held insertion rod; 10. Support spring. Detailed Implementation

[0021] 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 protection scope of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0023] Reference Figures 1 to 5 In this embodiment of the utility model, a portable manual hoop bending tool includes an arc-shaped mounting plate 1 and a handle 3. The arc-shaped mounting plate 1 has a semi-cylindrical shell structure and is usually made of high-strength alloy steel to withstand bending torque. Its inner side is designed as a smooth curved surface for tightly fitting the outer wall of the main shaft of the building, such as fitting the surface of the main reinforcing steel bar of a beam or column. An upper fixed mounting block 2 is welded or integrally cast on the outer wall of the arc-shaped mounting plate 1. The handle 3 is connected to the upper fixed mounting block 2 as a lever for applying force. An inwardly recessed mounting groove is opened on the inner side wall of the arc-shaped mounting plate 1. An auxiliary hoop bending wheel 6 for abutting the hoop is rotatably installed in the mounting groove. When performing hoop bending operations, the hoop is located between the main shaft of the building and the auxiliary hoop bending wheel 6. An anti-slip guard arm 7 is connected to one side of the arc-shaped mounting plate 1. The anti-slip guard arm 7 and the arc-shaped mounting plate 1 cooperate to form a closed or semi-closed limiting space for surrounding the main shaft of the building, ensuring that the device will not detach from the main shaft during rotation.

[0024] To reduce bending resistance and improve forming quality, the auxiliary bending roller 6 is rotatably installed in the mounting groove of the arc-shaped mounting plate 1 via the central rotating shaft 5. The two ends of the central rotating shaft 5 are fixed to the side wall of the mounting groove, allowing the roller to rotate flexibly. To accommodate stirrups of different diameters on the construction site, several sets of auxiliary bending rollers 6 are arranged side by side along the axial direction of the central rotating shaft 5, and the groove width of each set of auxiliary bending rollers 6 is different to accommodate stirrups of different diameters. Construction personnel can select the corresponding groove position for locking according to the actual stirrup thickness. One end of the anti-slip guard arm 7 is rotatably connected to the side of the arc-shaped mounting plate 1, realizing the opening and closing function of the guard arm. The other end is detachably connected to the edge of the arc-shaped mounting plate 1 through the locking component, which facilitates quick insertion and removal of the device.

[0025] Specifically, the locking assembly includes a positioning hole 8 on the edge of the arc-shaped mounting plate 1 and a handle 9 movably mounted on the other end of the anti-slip guard arm 7. To ensure the reliability and convenience of locking, a support spring 10 is fitted on the handle 9. The two ends of the support spring 10 are fixedly connected to the end protrusion of the handle 9 and the outer side of the anti-slip guard arm 7, respectively. When the support spring 10 is in a naturally extended state without external force, the spring restoring force pushes the handle 9 inward, so that the end of the handle 9 extends out and inserts into the positioning hole 8 and fills the hole, thereby achieving automatic locking.

[0026] Considering the need for portability and storage, the bottom of the handle 3 is fixedly provided with a connecting thread head 4, and the top of the upper fixed mounting block 2 is provided with a threaded blind hole that matches the connecting thread head 4. The handle 3 is threadedly connected to the upper fixed mounting block 2 through the connecting thread head 4, which facilitates disassembly and transportation. At the same time, the outer surface of the handle 3 is provided with anti-slip knurling or covered with a rubber anti-slip sleeve, which increases the friction of the hand and prevents slipping during operation.

[0027] The working principle of this utility model is as follows: Before use, the handle 3 is first tightened and fixed to the upper fixed mounting block 2 by the connecting thread head 4 to complete the assembly. Then, the operator pulls the handle rod 9 outward to compress the support spring 10, so that the end of the handle rod 9 is disengaged from the positioning hole 8 and the locking state is released. At this time, the anti-slip guard arm 7 is rotated to open, and the inner side of the arc-shaped mounting plate 1 is attached to the predetermined height position of the main shaft of the building (such as the main reinforcement of the column). Then, the anti-slip guard arm 7 is closed and the handle rod 9 is released. Under the natural rebound force of the support spring 10, the handle rod 9 automatically inserts into the positioning hole 8 and fills the hole, and the device is firmly fitted on the main shaft of the building. The anti-slip guard arm 7 ensures that the device will not fall off during operation.

[0028] After the device is fixed, the stirrup to be bent is placed in the mounting groove inside the arc-shaped mounting plate 1, and the groove of the auxiliary bending roller 6 with an appropriate width is selected according to the diameter of the stirrup for positioning. At this time, the stirrup is clamped between the surface of the building main shaft and the auxiliary bending roller 6. The operator holds the handle 3 with both hands and applies a rotational torque with the building main shaft as the central fulcrum, which drives the arc-shaped mounting plate 1 to rotate along the outer circumference of the building main shaft. During the rotation, the auxiliary bending roller 6 rolls close to the surface of the stirrup and applies tangential thrust, forcing the stirrup to undergo plastic deformation around the building main shaft, thereby completing the bending action. Due to the use of rolling friction, the bending process is smooth and labor-saving, and the stirrup is formed with a rounded arc.

[0029] When the bending operation is completed and the tool needs to be removed, pull the handle 9 again to overcome the resistance of the support spring 10, pull the handle out of the positioning hole 8, rotate to open the anti-slip guard arm 7, and the entire device can be removed from the main shaft of the building. If it needs to be moved to another location, the handle 3 can be unscrewed and the components can be stored separately in the toolbox. The whole process does not require electric drive and relies entirely on the clever use of mechanical structure to assist the force, making it particularly suitable for steel bar processing operations in high-altitude, narrow and power-free environments.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A portable manual hoop bending tool, characterized in that, Includes an arc-shaped mounting plate (1) and a grip handle (3); The arc-shaped mounting plate (1) has a semi-cylindrical shell structure, and its inner side is used to fit the outer wall of the building's main shaft. The outer wall of the arc-shaped mounting plate (1) is provided with an upper fixed mounting block (2), and the grip handle (3) is connected to the upper fixed mounting block (2); An installation groove is provided on the inner side wall of the arc-shaped mounting plate (1), and an auxiliary bending hoop wheel (6) for abutting the hoop is rotatably installed in the installation groove. One side of the arc-shaped mounting plate (1) is connected to an anti-slip guard (7), which, together with the arc-shaped mounting plate (1), forms a limiting space for surrounding the main axis of the building.

2. The portable manual hoop bending tool according to claim 1, characterized in that: The auxiliary bending wheel (6) is rotatably installed in the mounting groove of the arc-shaped mounting plate (1) via the central rotating shaft (5), and the two ends of the central rotating shaft (5) are fixed to the side wall of the mounting groove.

3. A portable manual hoop bending tool according to claim 2, characterized in that: The auxiliary bending wheels (6) are arranged in several groups along the axial direction of the central rotating shaft (5), and the groove width of each group of auxiliary bending wheels (6) is different to accommodate stirrups of different diameters.

4. A portable manual hoop bending tool according to claim 1, characterized in that: One end of the anti-slip guard arm (7) is rotatably connected to the side of the arc-shaped mounting plate (1), and the other end is detachably connected to the edge of the arc-shaped mounting plate (1) through a locking component.

5. A portable manual hoop bending tool according to claim 4, characterized in that: The locking assembly includes a positioning socket (8) on the edge of the arc-shaped mounting plate (1) and a handle (9) movably mounted on the other end of the anti-slip arm (7).

6. A portable manual hoop bending tool according to claim 5, characterized in that: A support spring (10) is fitted on the handle (9). The two ends of the support spring (10) are fixedly connected to the end protrusion of the handle (9) and the outside of the anti-slip guard (7), respectively. When the support spring (10) is in a naturally extended state without external force, the end of the handle (9) extends out and inserts into the positioning hole (8) and fills the hole.

7. A portable manual hoop bending tool according to claim 1, characterized in that: The bottom end of the grip handle (3) is fixedly provided with a connecting thread head (4), and the top end of the upper fixed mounting block (2) is provided with a threaded blind hole that matches the connecting thread head (4). The grip handle (3) is threadedly connected to the upper fixed mounting block (2) through the connecting thread head (4).

8. A portable manual hoop bending tool according to claim 1, characterized in that: The outer surface of the grip handle (3) is provided with anti-slip knurling or covered with a rubber anti-slip sleeve.

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