A building construction formwork fastening device

Abstract

This utility model relates to the field of building construction technology, specifically a formwork fastening device for building construction, comprising: a tie rod, wherein at least two guide grooves are spaced apart circumferentially on the outer wall of the tie rod; two clamps, each clamp being movably fitted onto the tie rod, and each clamp having a guide protrusion corresponding to each guide groove; and an adjustment mechanism connected to the corresponding guide protrusion on each clamp. This utility model forms a cooperative limiting structure by providing guide grooves on the tie rod, corresponding guide protrusions on the clamps, and an adjustment mechanism driving their movement. During installation, the adjustment mechanism drives the guide protrusions to maintain a gap with the guide grooves, facilitating clamp fitting and achieving circumferential limiting through their cooperation. During locking, the adjustment mechanism drives the guide protrusions to embed into the guide grooves and fit tightly, using this adjustment to achieve axial limiting of the clamps while simultaneously enhancing the circumferential anti-rotation effect.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a building construction formwork fastening device. Background Technology

[0002] During the concrete pouring process in building construction, temporary support frames are erected using formwork to ensure that the concrete can be formed according to the design shape and size. Because lateral pressure is generated during concrete pouring, the formwork needs to be fixed with fastening devices to prevent deformation and displacement, thus ensuring the construction quality and precision of the concrete structure. Therefore, formwork fastening devices are an indispensable and crucial component in building construction.

[0003] The commonly used formwork fastening devices in existing building construction mainly consist of tie rods, clamps, steel pipes, timber, and fastening nuts. The fastening process is roughly as follows: tie rods are inserted between two parallel formwork panels; clamps are fitted onto both ends of the tie rods; steel pipes and timber are placed between the clamps and the formwork to enhance support strength; then, fastening nuts, which are threaded onto the tie rods, are screwed into the outside of the clamps; tightening the nuts applies axial pressure to the clamps, causing them to press tightly against the steel pipes, timber, and formwork, thus achieving formwork fastening.

[0004] However, in existing fastening devices, the clamps are typically directly mounted on the tie rods, lacking an effective circumferential limiting structure between them. During the tightening process of the nut, the clamps tend to rotate circumferentially along the tie rods as the nut rotates, making it difficult to accurately align and clamp the clamps with intermediate components such as steel pipes and timber. This rotation not only increases the difficulty for construction workers to adjust the clamp position but may also affect the fastening effect of the formwork due to inaccurate alignment, reducing construction efficiency. Therefore, we propose a new formwork fastening device for building construction to effectively solve the above-mentioned drawbacks. Utility Model Content

[0005] The purpose of this utility model is to provide a formwork fastening device for building construction, which solves the problem in the prior art mentioned in the background that the clamps are prone to circumferential rotation along the tie rod.

[0006] This utility model is achieved through the following technical solution: a formwork fastening device for building construction, comprising:

[0007] A tie rod, wherein at least two guide grooves are provided circumferentially spaced on the outer wall of the tie rod, and each guide groove extends along the axial direction of the tie rod;

[0008] Two clamps are movably mounted on the pull screw. Each clamp is provided with a guide protrusion corresponding to each guide groove. Each clamp is provided with an adjustment mechanism connected to the corresponding guide protrusion. The adjustment mechanism is used to drive the guide protrusion to move along the depth direction of the guide groove.

[0009] Two fastening nuts, both of which are threaded to the tie rod, are located on opposite sides of the two clamps.

[0010] Optionally, the clamping surface of the fixture is evenly distributed with a number of anti-slip strips, each of which is made of rubber material.

[0011] Optionally, an anti-slip pad is fixed in the guide groove along its length, and the anti-slip pad is made of rubber material; several tooth-like structures are evenly distributed on the side of the guide ridge near the anti-slip pad.

[0012] Optionally, the adjustment mechanism includes a mounting cavity disposed within the clamp, and a connecting rod is fixed on the side of the guide protrusion away from the guide groove, with the end of the connecting rod away from the guide protrusion being movably inserted into the mounting cavity;

[0013] A linkage rod is hinged to the end of the connecting rod and located in the mounting cavity. The linkage rod is V-shaped and its middle part is rotatably connected to the mounting cavity through a rotating shaft.

[0014] Optionally, the adjustment mechanism further includes a drive rod located within the mounting cavity, the drive rod being movable along the axial direction of the pull screw, and the end of the linkage rod away from the connecting rod being hinged to the drive rod.

[0015] Optionally, a movable ring is provided between the clamp and the fastening nut, one end of the drive rod extends into the mounting cavity and is fixedly connected to the movable ring, and a return spring is sleeved on the drive rod between the clamp and the movable ring;

[0016] Under normal conditions, the return spring is in a naturally extended state to maintain a certain distance between the movable ring and the clamp.

[0017] Compared with the prior art, the present invention provides a formwork fastening device for building construction, which has the following beneficial effects:

[0018] This invention forms a cooperative limiting structure by providing a guide groove on the tie screw and correspondingly providing a guide protrusion and an adjustment mechanism to drive its movement on the clamp. During installation, the adjustment mechanism drives the guide protrusion to maintain a gap with the guide groove, which facilitates clamp fitting and achieves circumferential limiting through the cooperation of the two. During locking, the adjustment mechanism drives the guide protrusion to embed into the guide groove and fit tightly, using this adjustment to achieve axial limiting of the clamp and enhance the circumferential anti-rotation effect.

[0019] This design fundamentally solves the problem of existing clamps rotating with the nut. By adjusting the guide ribs, the axial movement of the clamp is precisely limited, ensuring that the clamp stably maintains the preset angle, facilitating precise alignment and clamping with the intermediate components. The adjustment mechanism balances ease of installation with locking reliability, simplifying the operation process while ensuring the stability of the template, improving construction efficiency and concrete forming quality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 This is a front view of the present invention;

[0023] Figure 4 for Figure 3 Sectional view along the BB direction;

[0024] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0025] Figure 6 for Figure 5 Enlarged view of point D in the middle.

[0026] In the diagram: 1. Pull screw; 2. Clamp; 3. Guide rib; 4. Adjustment mechanism; 401. Mounting cavity; 402. Connecting rod; 403. Linkage rod; 404. Drive rod; 5. Guide groove; 6. Fastening nut; 7. Anti-slip strip; 8. Anti-slip pad; 9. Movable ring; 10. Return spring. Detailed Implementation

[0027] 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.

[0028] Please see Figures 1 to 6 A formwork fastening device for building construction includes: tie rods 1, two clamps 2, and two fastening nuts 6. In this embodiment, a plurality of anti-slip strips 7 are evenly distributed on the clamping surface of the clamps 2, and each anti-slip strip 7 is made of rubber material. The elastic deformation of the rubber material increases the friction with the clamped components such as steel pipes, effectively preventing relative slippage during clamping and improving the fixing stability of the intermediate support components.

[0029] The tie rod 1 has at least two guide grooves 5 spaced circumferentially on its outer wall, each extending axially along the tie rod 1. Two clamps 2 are movably fitted onto the tie rod 1, and each clamp 2 has a guide protrusion 3 corresponding to each guide groove 5. When a clamp 2 is fitted onto the tie rod 1, the cooperation between the guide protrusion 3 and the guide groove 5 allows the clamp 2 to move only axially along the tie rod 1. Each clamp 2 is equipped with an adjustment mechanism 4 connected to the corresponding guide protrusion 3, which drives the guide protrusion 3 to move along the depth direction of the guide groove 5. By adjusting the cooperation between the guide protrusion 3 and the guide groove 5, a gap can be maintained during installation to facilitate clamp fitting, while a tight fit can be achieved during locking to form circumferential and axial limits.

[0030] In addition, both fastening nuts 6 are threadedly connected to the tie rod 1, and the two fastening nuts 6 are located on opposite sides of the two clamps 2. By tightening the fastening nuts 6, axial pressure can be applied to the clamps 2, thereby achieving the fastening and locking of the template.

[0031] It should be added that an anti-slip pad 8, made of rubber, is fixed along the length of the guide groove 5; several tooth-like structures are evenly distributed on the side of the guide rib 3 near the anti-slip pad 8. By adjusting the mechanism 4, the guide rib 3 is driven to move along the depth direction of the guide groove 5, allowing the guide rib 3 and the guide groove 5 to form a tight fit: when the guide rib 3 moves inward into the guide groove 5, the tooth-like structures embed into the surface of the rubber anti-slip pad 8, forming an axial limiting structure through their meshing. This structure directly restricts the axial relative sliding between the guide rib 3 and the guide groove 5, thereby providing reliable axial positioning for the clamp 2 and effectively avoiding the single force mode of relying solely on the axial locking force of the fastening nut 6 to achieve axial limiting of the clamp 2.

[0032] The following is a description of the regulating mechanism 4:

[0033] The adjustment mechanism 4 includes a mounting cavity 401 disposed within the clamp 2. A connecting rod 402 is fixed on the side of the guide protrusion 3 away from the guide groove 5, and the end of the connecting rod 402 away from the guide protrusion 3 is movably inserted into the mounting cavity 401. When the connecting rod 402 moves along its own axial direction, it can directly drive the guide protrusion 3 to move synchronously along the depth direction of the guide groove 5.

[0034] A linkage rod 403 is hinged to the end of the connecting rod 402 and located in the mounting cavity 401. The linkage rod 403 is V-shaped and its middle part is rotatably connected to the mounting cavity 401 through a rotating shaft. When the linkage rod 403 rotates around the rotating shaft, the swing directions of its two ends are opposite, thereby driving the connecting rod 402 to reciprocate along its own axis through the hinge point.

[0035] The adjustment mechanism 4 also includes a drive rod 404 located in the mounting cavity 401. The drive rod 404 is axially movable along the tie rod 1. The end of the linkage rod 403 away from the connecting rod 402 is hinged to the drive rod 404. When the drive rod 404 moves axially, the linkage rod 403 can be pushed to rotate around the axis through the hinge point, thereby precisely adjusting the position of the guide rib 3 through the connecting rod 402.

[0036] To achieve automatic linkage control of the drive rod 404: a movable ring 9 is provided between the clamp 2 and the fastening nut 6, one end of the drive rod 404 extends into the mounting cavity 401 and is fixedly connected to the movable ring 9, and a return spring 10 is sleeved on the drive rod 404 between the clamp 2 and the movable ring 9.

[0037] Under normal conditions, the return spring 10 is in a naturally extended state. The elastic force keeps a certain distance between the movable ring 9 and the clamp 2. At this time, the drive rod 404 is not subjected to axial force, the linkage rod 403 and the connecting rod 402 are in the initial position, and the guide convex 3 only forms a circumferential limit with the guide groove 5 (does not contact the anti-slip pad 8). This not only prevents the clamp 2 from rotating, but also retains flexible adjustment space along the axial direction of the pull screw 1, which is convenient for installation and alignment.

[0038] When the fastening nut 6 is tightened, the fastening nut 6 presses the movable ring 9 axially. The movable ring 9 compresses the return spring 10 and drives the drive rod 404 to move into the mounting cavity 401. Through the lever action of the linkage rod 403, the connecting rod 402 and the guide protrusion 3 are pushed to move into the guide groove 5, so that the toothed structure is embedded in the anti-slip pad 8 to achieve axial limit locking.

[0039] The adjustment mechanism, through mechanical linkage design, converts the axial locking force of the fastening nut 6 into the radial adjustment force of the guide rib 3. It can achieve the function switching of "flexible alignment during installation and automatic limit during locking" without additional operation, simplifying the construction steps. The setting of the reset spring 10 ensures that the guide rib 3 automatically resets when the nut is loosened, which facilitates the disassembly and reuse of the device. At the same time, the elastic buffer reduces the hard impact of the components and extends the service life.

[0040] Working principle:

[0041] When fastening the template, first pass the tie rod 1 through two parallel templates, then put the clamps 2 on both ends of the tie rod 1, with the clamping surface of the clamps 2 facing the template, and place steel pipes, wooden blocks, or other components between the clamps 2 and the template. At this time, the return spring 10 is in a naturally extended state, the movable ring 9 maintains a distance from the clamps 2, the guide rib 3 is embedded in the guide groove 5 to achieve circumferential limiting (without contacting the anti-slip pad 8), and the clamps 2 can move flexibly along the axial direction of the tie rod 1 to adjust the alignment.

[0042] After alignment, tighten the fastening nut 6 on the outside of the clamp 2. The nut compresses the movable ring 9, causing it to compress the return spring 10. The movable ring 9 then drives the drive rod 404 to move into the mounting cavity 401. The drive rod 404 rotates around the pivot axis via the hinged linkage rod 403, pushing the connecting rod 402 and the guide protrusion 3 into the guide groove 5. This causes the toothed structure of the guide protrusion 3 to embed into the anti-slip pad 8, achieving axial limiting and locking. Continuously tighten the fastening nut 6, applying axial pressure to the intermediate component and template through the clamp 2 to complete the template fastening.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A formwork fastening device for building construction, characterized in that, include: A tie rod (1) has at least two guide grooves (5) spaced apart circumferentially on its outer wall, and each guide groove (5) extends along the axial direction of the tie rod (1). Two clamps (2) are movably mounted on the pull screw (1). Each clamp (2) is provided with a guide protrusion (3) corresponding to each guide groove (5). Each clamp (2) is provided with an adjustment mechanism (4) connected to the corresponding guide protrusion (3). The adjustment mechanism (4) is used to drive the guide protrusion (3) to move along the depth direction of the guide groove (5). Two fastening nuts (6) are threadedly connected to the pull rod (1), and the two fastening nuts (6) are located on opposite sides of the two clamps (2).

2. The formwork fastening device for building construction according to claim 1, characterized in that: The clamping surface of the clamp (2) is evenly distributed with several anti-slip strips (7), each anti-slip strip (7) being made of rubber material.

3. The formwork fastening device for building construction according to claim 1, characterized in that: An anti-slip pad (8) is fixed inside the guide groove (5) along its length direction. The anti-slip pad (8) is made of rubber material. Several tooth-like structures are evenly distributed on the side of the guide ridge (3) near the anti-slip pad (8).

4. A formwork fastening device for building construction according to claim 1, characterized in that: The adjustment mechanism (4) includes a mounting cavity (401) disposed in the clamp (2), and a connecting rod (402) is fixed on the side of the guide protrusion (3) away from the guide groove (5). The end of the connecting rod (402) away from the guide protrusion (3) is movably inserted into the mounting cavity (401). A linkage rod (403) is hinged to the end of the connecting rod (402) and located in the mounting cavity (401). The linkage rod (403) is V-shaped and its middle part is rotatably connected to the mounting cavity (401) through a rotating shaft.

5. A formwork fastening device for building construction according to claim 4, characterized in that: The adjustment mechanism (4) also includes a drive rod (404) located in the mounting cavity (401), the drive rod (404) being able to move axially along the pull screw (1), and the end of the linkage rod (403) away from the connecting rod (402) being hinged to the drive rod (404).

6. A formwork fastening device for building construction according to claim 5, characterized in that: A movable ring (9) is provided between the clamp (2) and the fastening nut (6). One end of the drive rod (404) extends into the mounting cavity (401) and is fixedly connected to the movable ring (9). A return spring (10) located between the clamp (2) and the movable ring (9) is sleeved on the drive rod (404). Under normal conditions, the return spring (10) is in a naturally extended state so that the movable ring (9) and the clamp (2) maintain a certain distance.

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