A concrete floor crack inducing joint forming device

Abstract

The utility model relates to the field of building construction especially relates to a concrete floor crack induced joint forming device, including core mould, two sliding guide rails are connected to the top of core mould with sliding mode, two pullout rods are connected to the upside of core mould with sliding mode, the top of pullout rod is connected with each other, pullout rod allows the motion of going up and down to can carry out unceasing vibration when dismantling, reduces the difficulty of dismounting, the both sides of core mould are all clamped and have the blocking piece, the connecting piece is all connected with screw mode on the blocking piece, is used for the horizontal splicing between core moulds.

Description

Technical Field

[0001] This utility model relates to the field of building construction, and in particular to a device for inducing cracks in concrete floor slabs. Background Technology

[0002] In the construction of cast-in-place concrete slabs, in order to control disorderly cracking caused by factors such as temperature changes and shrinkage deformation, it is often necessary to pre-set induced joints to guide the cracks to spread regularly in the predetermined position. Traditional molding methods often use easily compressible materials such as embedded foam strips or wooden strips as core molds. These are easily deformed or floated during the concrete pouring process, making it difficult to ensure that the depth and straightness of the induced joint are uniform. Moreover, the removal operation is extremely difficult, often requiring manual chiseling and prying, which is not only inefficient and labor-intensive, but also very likely to damage the concrete at the joint edge, affecting the appearance quality and structural integrity. In addition, when a long induced joint needs to be set, there is a lack of effective positioning and fastening means for splicing multiple short mold segments. It mainly relies on the visual alignment of construction workers, resulting in frequent splicing misalignment problems, which leads to the distortion of the molding joint line and makes it difficult to meet the high standard construction requirements.

[0003] Therefore, there is an urgent need for a specialized device that can ensure molding quality, facilitate quick demolding, and achieve precise splicing. Utility Model Content

[0004] In order to overcome the shortcomings of existing devices during use, this utility model provides a concrete floor slab crack induction joint forming device.

[0005] The technical implementation scheme of this utility model is as follows: a concrete floor slab crack induction joint forming device, including a core mold, two sliding guide rails are slidably connected to the top of the core mold, two pull rods are slidably connected to the upper side of the core mold, the tops of the pull rods are connected to each other, the pull rods are allowed to move up and down, so that they can vibrate continuously during disassembly, reducing the difficulty of disassembly, and sealing parts are snapped on both the left and right sides of the core mold, and connecting parts are threadedly connected to the sealing parts for lateral splicing between the core molds.

[0006] Furthermore, it also includes fixing blocks, which are provided on both the front and rear sides of the left and right parts of the core mold.

[0007] Furthermore, limit blocks are provided on both the upper and lower sides of the pull rod.

[0008] Furthermore, the upper right side of the core mold has two handles that are rotatably connected to facilitate holding the core mold.

[0009] Furthermore, each of the sealing components is provided with a positioning protrusion to facilitate the positioning and installation of the sealing component.

[0010] Furthermore, each of the fixing blocks is provided with a scale mark, which facilitates horizontal alignment when the core molds are spliced ​​together.

[0011] By adopting the above technical solution, this utility model has the following advantages: 1. This utility model uses a core mold structure with a pull rod and a sliding guide rail. Through the continuous micro-vibration generated during the upward pulling of the pull rod, the bonding force between the core mold and the hardened concrete is effectively broken, making the demolding process labor-saving and efficient. This greatly reduces the risk of damage to the concrete at the joint edge and ensures the integrity and aesthetics of the induced joint.

[0012] 2. This utility model achieves rapid and accurate alignment and firm splicing between multiple core molds by setting a sealing component and a fixing block with positioning protrusions and scale marks, ensuring the straightness of the long induced joint and significantly improving construction quality and efficiency. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a schematic diagram of the first partial cross-sectional three-dimensional structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the second partial cross-sectional three-dimensional structure of this utility model.

[0016] Figure 4 This is a partial three-dimensional structural diagram of the present invention.

[0017] In the above attached diagram: 1: core mold, 2: sliding guide rail, 3: pull rod, 4: handle, 5: sealing component, 6: connector, 7: positioning protrusion, 8: fixing block, 9: scale mark. Detailed Implementation

[0018] References to embodiments herein mean that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] A device for inducing and forming cracks in concrete floor slabs, such as Figures 1-4As shown, the device includes a core mold 1. Two sliding guide rails 2 are slidably connected to the top of the core mold 1. Two pull rods 3 are slidably connected to the upper side of the core mold 1. Limiting blocks are provided on both the upper and lower sides of the pull rods 3. The tops of the pull rods 3 are connected to each other, allowing the pull rods 3 to move up and down, thereby vibrating continuously during disassembly and reducing the difficulty of disassembly. Two handles 4 are rotatably connected to the upper right side of the core mold 1 for easy handling. Sealing parts 5 are snapped onto both the left and right sides of the core mold 1. Connecting parts 6 are threaded onto the sealing parts 5 for lateral splicing between the core molds 1. Positioning protrusions 7 are provided on the sealing parts 5 for easy positioning and installation. Fixing blocks 8 are provided on the front and rear sides of both the left and right sides of the core mold 1. Scale marks 9 are provided on the fixing blocks 8 for easy horizontal alignment when splicing between the core molds 1.

[0020] It should be noted that this device is placed in the designed position of the floor slab formwork before concrete pouring. The operator can easily move and adjust the position of the core mold 1 by rotating the two handles 4 connected to the upper right side of the core mold 1. To ensure the straightness and continuity of the induced joint, when it is necessary to extend the joint length, the sealing parts 5 that are snapped on the left and right sides of the core mold 1 can be used for transverse splicing. Each sealing part 5 is provided with a positioning protrusion 7, which can quickly engage with the corresponding part of the adjacent core mold 1 to achieve initial alignment. Then, the connecting part 6 is screwed into the sealing part. Multiple core molds 1 are securely connected into a whole in the pre-set threaded holes on the 5th. To improve the splicing accuracy, scale marks 9 are engraved on the fixing blocks 8 set on the left and right sides and the front and rear sides of the core mold 1. Construction personnel can accurately calibrate its levelness by observing whether the scales on the fixing blocks 8 of adjacent core molds 1 are aligned, ensuring that the formed induced joint is straight and correct. During the concrete pouring and vibration process, the core mold 1 retains the pre-set gap shape within the floor slab. The two sliding guide rails 2 on the top of the core mold 1 are slidably connected, and the upper side of the core mold 1 is slidably connected. Both pull rods 3 are embedded in the concrete. The limiting blocks on the upper and lower sides of the pull rods 3 prevent them from being accidentally pulled out before the concrete hardens and ensure that they maintain a stable relative position with the core mold 1. When the concrete reaches the predetermined strength and the core mold 1 needs to be removed, the operator can pull the top of the pull rods 3, which are connected together, upwards. Since the pull rods 3 and the core mold 1 are slidably connected and allow up and down movement, during the continuous upward lifting process, the pull rods 3 will be subject to the adhesion resistance of the concrete and the intermittent resistance between their own limiting blocks and the structure of the core mold 1, thereby generating continuous micro-vibration. This vibration effect effectively breaks the bond between the core mold 1 and the hardened concrete, significantly reduces the disassembly resistance, and allows the core mold 1 to be removed smoothly. At the same time, a regular induced joint is formed in the floor slab. The entire workflow starts from the precise positioning and splicing of the core mold 1, goes through the concrete pouring and curing, and finally is easily disassembled with the help of the vibration of the pull rods 3. All components work together to not only ensure the forming quality of the induced joint, but also greatly improve construction efficiency and reduce labor intensity.

[0021] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A device for inducing and forming cracks in concrete floor slabs, characterized in that: The device includes a core mold (1), on which two sliding guide rails (2) are slidably connected at the top. Two pull rods (3) are slidably connected on the upper side of the core mold (1). The tops of the pull rods (3) are connected to each other. The pull rods (3) are allowed to move up and down, so that they can vibrate continuously during disassembly, reducing the difficulty of disassembly. The core mold (1) has sealing parts (5) on both the left and right sides. Each sealing part (5) has a threaded connector (6) for lateral splicing between the core molds (1).

2. The concrete floor slab crack induction joint forming device according to claim 1, characterized in that: It also includes a fixing block (8), which is provided on the front and back sides of the left and right parts of the core mold (1).

3. The concrete floor slab crack induction joint forming device according to claim 1, characterized in that: Limiting blocks are provided on both the upper and lower sides of the pull rod (3).

4. A concrete floor slab crack induction joint forming device according to claim 1, characterized in that: The core mold (1) has two handles (4) rotatably connected to the upper right side, which makes it easy to hold the core mold (1).

5. A concrete floor slab crack induction joint forming device according to claim 1, characterized in that: Each of the sealing components (5) is provided with a positioning protrusion (7) to facilitate the positioning and installation of the sealing components (5).

6. A concrete floor slab crack induction joint forming device according to claim 2, characterized in that: Each of the fixing blocks (8) is provided with a scale mark (9), which facilitates horizontal alignment when the core molds (1) are spliced ​​together.

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