A fast-release fastener for building formwork

Abstract

This utility model discloses a quick-release fastener for a building formwork back brace, comprising a support arm located on the outside of an aluminum alloy formwork. A threaded pin is threaded to the front end of one side of the support arm. A through-plate is provided through the top of the support arm, and a rectangular slot adapted to the through-plate is formed at the top of the support arm. An aluminum alloy back brace is fitted to the top of the support arm, with the surface of the through-plate tightly fitting the surface of the aluminum alloy back brace. A backstop component is provided within the rectangular slot, including a groove formed within the rectangular slot. This utility model uses the threaded pin and threaded plate to connect and fix the support arm and the aluminum alloy formwork. Subsequently, with the combined use of the through-plate, rectangular slot, and backstop component, the aluminum alloy back brace can be stably installed on the top of the support arm, achieving both backstop and quick removal, thus achieving a stable and reliable connection and rapid assembly / disassembly.

Description

Technical Field

[0001] This utility model belongs to the field of building formwork technology, and in particular relates to a quick-release fastener for the back rib of building formwork. Background Technology

[0002] During construction, the formwork back rib connecting fasteners use a simple insert plate fixing method, which lacks a backstop effect. Due to vibrations generated by concrete pouring and other operations, the insert plate is prone to loosening, leading to loosening and slippage between the back rib and the formwork. On the other hand, while the bolted fixing method for the back rib fasteners can achieve a backstop effect, it requires turning the nut multiple times with a wrench to tighten or loosen it during installation and disassembly, which is cumbersome. Therefore, there is a need for a quick-release fastener for the formwork back ribs that uses a double elastic element push-in backstop method to effectively prevent the vibrations generated by concrete pouring and other operations from affecting the stability of the insert plate. At the same time, it can be quickly installed and disassembled, making it convenient for construction workers to operate. Utility Model Content

[0003] The purpose of this utility model is to provide a quick-release fastener for the back rib of a building formwork, which adopts a double elastic element push-back anti-reverse method to effectively prevent the vibration generated by concrete pouring and other operations from affecting the stability of the insert plate. At the same time, it can be quickly disassembled and assembled, which is convenient for construction personnel to operate, thus solving the above-mentioned technical problems.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A quick-release fastener for a building formwork back rib includes a support arm located on the outside of an aluminum alloy formwork: a threaded pin is threadedly connected to the front end of one side of the support arm, an insert plate is provided through the top of the support arm, a rectangular slot adapted to the insert plate is opened at the top of the support arm, an aluminum alloy back rib is fitted at the top of the support arm, the surface of the insert plate is tightly fitted to the surface of the aluminum alloy back rib, a backstop component is provided in the inner cavity of the rectangular slot, the backstop component includes a sliding groove opened in the inner cavity of the rectangular slot, a backstop plate is slidably connected in the inner cavity of the sliding groove, a plurality of limiting slots adapted to the backstop plate are opened on one side of the insert plate, and a rectangular locking position is opened at the front end of the support arm.

[0005] Preferably, fixing pins are welded to the rear ends of both sides of the support arm, connecting plates are welded to both sides of the anti-reverse plate, and a tension spring is provided between the fixing pins and the connecting plates.

[0006] Preferably, the front and rear ends of the tension spring are welded to the connecting plate and the fixing pin, respectively.

[0007] Preferably, the inner cavity of the rectangular slot is provided with a threaded sleeve plate, and the threaded pin passes through the mounting hole of the aluminum alloy template and is threadedly connected to the threaded sleeve plate.

[0008] Preferably, the top and bottom of the rear side of the threaded sleeve are welded with limiting protrusions, and the rear side of the rectangular locking cavity is provided with a limiting groove, and the limiting protrusion is slidably connected to the inner cavity of the limiting groove.

[0009] The beneficial effects of this utility model are:

[0010] 1. This utility model uses the combined use of threaded pins and threaded sleeves to connect and fix the support arm and aluminum alloy template. Then, with the combined use of insert plates, rectangular slots and anti-reverse components, the aluminum alloy back rib can be stably installed on the top of the support arm, and it can play the role of anti-reverse and quick disassembly, thus achieving the purpose of stable and reliable connection and quick disassembly and assembly.

[0011] 2. This utility model uses a combination of a fixing pin, a connecting plate, and a tension spring to elastically pull the anti-reverse plate, allowing it to move actively towards the insertion plate. This enables the anti-reverse plate to engage actively in the inner cavity of the limiting slot, thus preventing and limiting the insertion plate. By using the anti-reverse plate to laterally limit the insertion plate and the two tension springs, the influence of vibration on the meshing stability of the anti-reverse plate and the limiting slot can be effectively avoided during construction.

[0012] 3. This utility model uses the combination of limiting protrusion and limiting groove to limit and guide the threaded sleeve, so that the threaded sleeve can slide stably along a predetermined trajectory, thereby enabling the threaded pin to accurately form a threaded connection with the threaded sleeve. Attached Figure Description

[0013] in:

[0014] Figure 1 This is a top view schematic diagram of one embodiment of the present utility model;

[0015] Figure 2 This is a perspective view of a support arm, insert plate, and anti-reverse assembly according to an embodiment of the present invention.

[0016] Figure 3 This is an exploded perspective view of the insert plate, rectangular slot, and anti-reverse assembly according to one embodiment of the present invention.

[0017] Figure 4 This is an exploded perspective view of the support arm, threaded pin, and threaded sleeve plate according to one embodiment of the present invention.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Aluminum alloy template, 2. Support arm, 3. Threaded pin, 4. Insert plate, 5. Rectangular slot, 6. Anti-reverse assembly, 61. Slide groove, 62. Anti-reverse plate, 63. Limiting slot, 64. Fixing pin, 65. Connecting plate, 66. Tension spring, 7. Rectangular slot, 8. Threaded sleeve, 9. Limiting protrusion, 10. Limiting groove, 11. Aluminum alloy back rib. Detailed Implementation

[0020] In the following description, embodiments of the quick-release fastener for the back rib of the building formwork of this utility model will be described with reference to the accompanying drawings.

[0021] Figure 1-4 This invention illustrates a quick-release fastener for a building formwork back brace according to an embodiment of the present invention. It includes a support arm 2 located on the outside of an aluminum alloy formwork 1. A threaded pin 3 is threaded to the front end of one side of the support arm 2. A plate 4 is threaded through the top of the support arm 2. A rectangular slot 5, adapted to the plate 4, is provided at the top of the support arm 2. An aluminum alloy back brace 11 is fitted at the top of the support arm 2. The surface of the plate 4 is tightly fitted to the surface of the aluminum alloy back brace 11. A backstop assembly 6 is provided within the rectangular slot 5. The backstop assembly 6 includes components formed in the rectangular slot 5. The inner cavity of slot 5 has a sliding groove 61, and a backstop plate 62 is slidably connected to the inner cavity of the sliding groove 61. Multiple limiting slots 63 adapted to the backstop plate 62 are opened on one side of the insert plate 4. Fixing pins 64 are welded to the rear ends of both sides of the support arm 2. Connecting plates 65 are welded to both sides of the backstop plate 62. A tension spring 66 is provided between the fixing pins 64 and the connecting plates 65. The front and rear ends of the tension spring 66 are welded to the connecting plates 65 and the fixing pins 64, respectively. Through the cooperative use of the fixing pins 64, the connecting plates 65, and the tension springs 66, the backstop plate 62 is secured. 2 acts as an elastic pull, allowing the anti-reverse plate 62 to move actively towards the insert plate 4, thereby enabling the anti-reverse plate 62 to actively engage in the inner cavity of the limiting groove 63, thus preventing and limiting the insert plate 4. The lateral limiting of the insert plate 4 by the anti-reverse plate 62 and the setting of two tension springs 66 effectively prevents the impact of vibration on the meshing stability of the anti-reverse plate 62 and the limiting groove 63 during construction. A rectangular locking position 7 is provided at the front end of the support arm 2, and a threaded sleeve 8 is provided in the inner cavity of the rectangular locking position 7. The threaded pin 3 passes through the mounting hole of the aluminum alloy template 1 and is threadedly connected to the threaded sleeve 8. Limiting protrusions 9 are welded to the top and bottom of the rear side of the threaded sleeve 8. A limiting groove 10 is opened on the rear side of the inner cavity of the rectangular slot 7. The limiting protrusion 9 is slidably connected to the inner cavity of the limiting groove 10. Through the cooperation of the limiting protrusion 9 and the limiting groove 10, the threaded sleeve 8 plays a limiting and guiding role, so that the threaded sleeve 8 can slide stably along the predetermined trajectory, thereby enabling the threaded pin 3 to accurately form a threaded connection with the threaded sleeve 8.

[0022] Working principle: When using this utility model, the user first places the rectangular locking position 7 onto the web surface of the aluminum alloy template 1, positioning it at the through hole in the web. Then, the threaded pin 3 is rotated. During rotation, the threaded pin 3 enters the inner cavity of the rectangular locking position 7 and comes into contact with the threaded sleeve 8. Continuing to rotate the threaded pin 3 causes the threaded sleeve 8 to slide within the inner cavity of the rectangular locking position 7. Finally, when the threaded pin 3 can no longer rotate, the support arm 2 is installed and fixed. Then, the aluminum alloy back rib 11 is assembled onto the top of the support arm 2, the insert plate 4 is inserted into the inner cavity of the rectangular slot 5, and the top of the insert plate 4 is tapped. The insert plate 4 is then subjected to the tapping action. As the plate slides downwards, it is simultaneously acted upon by the inclined surface of the insert plate 4. During its downward movement, the insert plate 4 compresses the aluminum alloy back rib 11, causing it to adhere tightly to the surface of the aluminum alloy template 1. As the insert plate 4 slides downwards, the anti-reverse plate 62, under the tension of the tension spring 66, repeatedly enters the inner cavity of different limiting slots 63, locking it laterally and preventing the insert plate 4 from slipping upwards. During disassembly, the user only needs to push the connecting plate 65 forward, causing the connecting plate 65 to slide and disengage from the limiting slots 63. At this point, the insert plate 4 can be removed by tapping it upwards from the bottom.

[0023] In summary, this quick-release fastener for the back brace of the building formwork, through the combined use of the threaded pin 3 and the threaded sleeve 8, connects and fixes the support arm 2 and the aluminum alloy formwork 1. Subsequently, with the combined use of the insert plate 4, the rectangular slot 5 and the anti-reverse component 6, the aluminum alloy back brace 11 can be stably installed on the top of the support arm 2, and it can achieve the effects of anti-reverse and quick removal, thus achieving the purpose of stable and reliable connection and quick assembly and disassembly.

Claims

1. A fast release form tie for building formwork, characterised in that, The support arm (2) located outside the aluminum alloy template (1) includes a threaded pin (3) at the front end of one side of the support arm (2), a plate (4) is provided through the top of the support arm (2), a rectangular slot (5) adapted to the plate (4) is provided at the top of the support arm (2), an aluminum alloy back rib (11) is provided at the top of the support arm (2), the surface of the plate (4) is closely fitted to the surface of the aluminum alloy back rib (11), a backstop assembly (6) is provided in the inner cavity of the rectangular slot (5), the backstop assembly (6) includes a slide groove (61) opened in the inner cavity of the rectangular slot (5), a backstop plate (62) is slidably connected in the inner cavity of the slide groove (61), a plurality of limiting slots (63) adapted to the backstop plate (62) are provided on one side of the plate (4), and a rectangular slot (7) is provided at the front end of the support arm (2).

2. The quick-release fastener for the back rib of the building formwork according to claim 1, characterized in that, Fixing pins (64) are welded to the rear ends of both sides of the support arm (2), connecting plates (65) are welded to both sides of the anti-reverse plate (62), and a tension spring (66) is provided between the fixing pins (64) and the connecting plates (65).

3. The quick-release fastener for the back rib of the building formwork according to claim 2, characterized in that, The front end and rear end of the tension spring (66) are welded to the connecting plate (65) and the fixing pin (64), respectively.

4. The quick-release fastener for the back rib of the building formwork according to claim 3, characterized in that, The inner cavity of the rectangular slot (7) is provided with a threaded sleeve plate (8), and the threaded pin (3) passes through the mounting hole of the aluminum alloy template (1) and is threadedly connected to the threaded sleeve plate (8).

5. The quick-release fastener for the back rib of the building formwork according to claim 4, characterized in that, Limiting protrusions (9) are welded to the top and bottom of the rear side of the threaded sleeve (8), and a limiting groove (10) is opened on the rear side of the inner cavity of the rectangular slot (7). The limiting protrusions (9) are slidably connected to the inner cavity of the limiting groove (10).

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