Reinforcing bar bending tool for laminated slab
By designing a bending tool for composite slab reinforcement, and using the cooperation of main and auxiliary sleeves, the problem of the inability to straighten and reposition the side reinforcement of composite slabs was solved, enabling the smooth lap splicing of beam reinforcement, improving the load-bearing capacity and stiffness of the beam, and realizing the reuse of waste materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA MCC 2 GRP CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-06-16
AI Technical Summary
During the construction of composite slabs, the side reinforcement bars of the composite slabs cannot be restored to the designated positions, resulting in the inability to overlap with the beam reinforcement bars, which affects the load-bearing capacity and stiffness of the beams.
A composite slab rebar bending tool was designed, including a main sleeve, a secondary sleeve, and a rubber handle. By using the cooperation of the main sleeve and the secondary sleeve, the rebar can be straightened and bent through the clamping plate and connecting bars, which is suitable for rebar adjustment in confined spaces.
It enables the smooth lap joint between the side reinforcement of the composite slab and the beam reinforcement, improves the load-bearing capacity and stiffness of the beam, solves the problem of straightening and repositioning the reinforcement in a confined space, and the material is readily available, realizing the reuse of waste materials.
Smart Images
Figure CN224359287U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of construction tools, specifically relating to a tool for bending steel bars in composite slabs. Background Technology
[0002] Composite floor slabs are assembled monolithic floor slabs made by stacking precast slabs and cast-in-place reinforced concrete layers. Composite floor slabs offer good overall integrity, with smooth upper and lower surfaces, facilitating finishing and making them suitable for high-rise buildings and large-span buildings requiring high overall rigidity. Composite slabs are constructed from precast formwork and steel trusses. They offer good overall integrity and seismic resistance, saving on formwork while ensuring a smooth surface, further facilitating finishing. Composite slabs possess excellent integrity and continuity, effectively enhancing the building's seismic resistance while reducing formwork usage. The flexible planar dimensions of composite slabs make it easier to create openings, suitable for building spans, and improving building functionality. Composite slabs do not require formwork during construction, resulting in high efficiency, effectively saving labor and building material consumption.
[0003] During the construction of composite slabs, if the beams are tied first and then the composite slabs are placed, the exposed reinforcing bars on the sides of the composite slabs can only be placed in their designated positions after being bent. However, the bent reinforcing bars cannot be straightened, and when the composite slabs are used, the bent reinforcing bars cannot be extended into the beam reinforcement for splicing. When the reinforcing bars of the composite slab extending into the beam are not straightened, it will cause uneven stress distribution within the beam, leading to localized stress concentration and failure to meet load-bearing requirements. This will reduce the beam's load-bearing capacity and stiffness, affecting its load-bearing capacity, stiffness, and longitudinal displacement capacity. Utility Model Content
[0004] The purpose of this utility model is to provide a bending tool for composite slab reinforcement, which facilitates the lap splicing of the reinforcement on the side of the composite slab with the reinforcement of the beam, and solves the problem that the reinforcement on the side of the composite slab is not easy to straighten and reposition in a narrow space.
[0005] The technical solution is as follows:
[0006] The composite slab rebar bending tool includes: a main sleeve and a secondary sleeve. The secondary sleeve is welded to the side of the main sleeve, and the bottoms of the main sleeve and the secondary sleeve are on the same plane. The outer wall of the secondary sleeve is provided with multiple secondary sleeve through holes, and the bottom of the inner hole of the main sleeve is welded with two parallel clamping plates, which are located on the same side as the secondary sleeve.
[0007] Furthermore, the outer diameter of the main bushing is larger than that of the secondary bushing.
[0008] Furthermore, the main sleeve is equipped with a rubber handle, and the rubber handle and the auxiliary sleeve are located at both ends of the main sleeve, respectively.
[0009] Furthermore, connecting ribs are provided at the weld seams of the main sleeve and the auxiliary sleeve, and the connecting ribs are made of steel bars.
[0010] This utility model has the following advantages compared with the prior art:
[0011] This utility model is easy to use and convenient for use in confined spaces. Once steelworkers get the hang of it, they can easily solve the problem of the side steel bars of the composite slab extending into the beam, so that the steel bars of the composite slab and the beam can be smoothly overlapped, thus solving the problem that the side steel bars of the composite slab are not easy to straighten and reposition in confined spaces.
[0012] This utility model has a simple structure. The main sleeve and the auxiliary sleeve are made from waste conduit and waste sleeve, and the materials are readily available, realizing the reuse of waste materials. Attached Figure Description
[0013] Figure 1 This is a structural schematic diagram of the composite slab rebar bending tool of this utility model;
[0014] Figure 2 yes Figure 1 A bottom view;
[0015] Figure 3 This is a schematic diagram of the welding position of the card plate in this utility model. Detailed Implementation
[0016] The following description fully illustrates specific embodiments of the present invention to enable those skilled in the art to practice and reproduce them.
[0017] like Figure 1 The diagram shown is a structural schematic of the composite slab rebar bending tool of this utility model; as shown... Figure 2 As shown, is Figure 1 A bottom view.
[0018] The composite slab rebar bending tool includes: a main sleeve 1 and a secondary sleeve 2. The secondary sleeve 2 is welded to the side of the main sleeve 1, and the bottoms of the main sleeve 1 and the secondary sleeve 2 are on the same plane.
[0019] The outer diameter of the main sleeve 1 is larger than that of the secondary sleeve 2. The outer wall of the secondary sleeve 2 is provided with multiple secondary sleeve through holes 21, which are distributed on both sides and the outer side of the secondary sleeve 2. The inner holes of the main sleeve 1 and the secondary sleeve through holes 21 are used to insert the reinforcing bars on the side of the composite slab, which is conducive to bending or straightening the reinforcing bars in narrow spaces.
[0020] The main sleeve 1 is equipped with a rubber handle 11, and the rubber handle 11 and the auxiliary sleeve 2 are located at both ends of the main sleeve 1.
[0021] To improve the welding strength of the main sleeve 1 and the auxiliary sleeve 2, a connecting rib 4 is connected at the weld 3 of the main sleeve 1 and the auxiliary sleeve 2. The connecting rib is made of steel bars, and waste steel bars are readily available at the construction site, thus realizing the reuse of waste materials.
[0022] The connecting rib 4 and the secondary sleeve 2 have the same length.
[0023] like Figure 3 The diagram shown is a schematic of the welding position of the card plate 5 in this utility model.
[0024] Two parallel clamping plates 5 are welded to the inner wall of the main sleeve 1. The clamping plates 5 are located at the bottom of the inner hole of the main sleeve 1. The clamping plates 5 and the auxiliary sleeve 2 are located on the same side. The clamping plates 5 are used to bend or straighten the reinforcing bars with hooks on the side of the composite plate.
[0025] The process of using the composite slab rebar bending tool:
[0026] During the construction of composite slabs, if the steel reinforcement cage of the beam is tied first and then the composite slab is placed, the steel reinforcement on the side of the composite slab can only be placed in the designated position after being bent. Since the bent steel reinforcement on the side of the composite slab cannot be restored and cannot extend into the beam reinforcement, the beam reinforcement and the steel reinforcement on the side of the composite slab cannot be lapped, which cannot meet the stress requirements. Therefore, it is necessary to straighten or bend the steel reinforcement on the side of the composite slab to the designated angle to meet the lapping requirements.
[0027] Because there are many reinforcing bars at the lap joints on the sides of the tied beams and composite slabs, the space for bending is small. Sometimes the reinforcing bars on the sides of the composite slabs have hooks, and it is difficult to meet the needs of correction or bending by using sleeves alone.
[0028] If the reinforcing bars on the side of the composite slab are straight and short without hooks, insert the reinforcing bars into the through hole 21 of the secondary sleeve. The steelworker holds the rubber handle 11 at the other end of the composite slab reinforcing bar bending tool to straighten or bend them to the specified angle. When the rubber handle 11 is rotated to a position with a larger operating space, the reinforcing bars will disengage from the through hole 21 of the secondary sleeve. The reinforcing bars will then be reinserted into the inner hole from the bottom of the secondary sleeve 2 and straightened or bent again to achieve the lap splicing of the beam reinforcing bars and the reinforcing bars on the side of the composite slab.
[0029] If the reinforcing bars on the side of the composite slab have hooks, the hooks are inserted between two clamping plates 5 for correction or bending, so as to achieve the lap splicing of the beam reinforcing bars with the reinforcing bars on the side of the composite slab.
[0030] The terminology used in this invention is descriptive and exemplary, and not restrictive. Since this invention can be embodied in various forms without departing from the spirit or essence of the technical solution, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.
Claims
1. A tool for bending reinforcing bars in composite slabs, characterized in that, It includes: a main sleeve and a secondary sleeve. The secondary sleeve is welded to the side of the main sleeve, and the bottoms of the main sleeve and the secondary sleeve are on the same plane. The outer wall of the secondary sleeve is provided with multiple secondary sleeve through holes. The bottom of the inner hole of the main sleeve is welded with two parallel clamping plates, and the clamping plates and the secondary sleeve are on the same side.
2. The composite slab rebar bending tool as described in claim 1, characterized in that, The outer diameter of the main bushing is larger than that of the secondary bushing.
3. The composite slab rebar bending tool as described in claim 1, characterized in that, The main sleeve is equipped with a rubber handle, and the rubber handle and the auxiliary sleeve are located at both ends of the main sleeve.
4. The composite slab rebar bending tool as described in claim 1, characterized in that, Connecting ribs are provided at the weld seams of the main sleeve and the auxiliary sleeve. The connecting ribs are made of steel bars.