Device for fastening joints in fair-faced concrete formwork and its construction method

Abstract

This invention discloses a fastening device for joints in fair-faced concrete formwork and its construction method, comprising: a telescopic tube assembly, including a socket sleeve and a connecting sleeve, the socket sleeve having a first end and a second end opposite to each other, and the connecting sleeve having a third end and a fourth end opposite to each other, the third end being movably inserted into the first end, and the fourth end extending to the outside of the first end; anchors, the second end and the fourth end being respectively connected to anchors, the formwork having multiple insertion holes, and two anchors on the telescopic tube assembly being detachably inserted into the corresponding insertion holes of two adjacent formwork sections; a locking assembly, including a core rod and a pusher, the core rod being movably inserted into the connecting sleeve, one end of the core rod being fixedly connected to the socket sleeve, and the other end of the core rod extending to the outside of the fourth end, the pusher being adjustablely installed at the other end of the core rod, and the pusher pressing against the fourth end. This invention solves the problem of insufficient joint tightness between adjacent formwork sections in traditional loose-assembly formwork assembly methods that rely solely on worker experience.

Description

Technical Field

[0001] This invention relates to the field of building formwork construction technology, specifically to a fastening device for joints in fair-faced concrete formwork and its construction method. Background Technology

[0002] During the implementation of fair-faced concrete projects, if the joint interface of the formwork joints does not meet the requirements of sufficient airtightness, then during the subsequent concrete structure pouring stage, especially in the vibration compaction stage, due to the combined effect of the self-weight pressure of the poured body and the excitation force of the vibration equipment, the cementitious slurry in the poured body will seep out through the defective formwork joints.

[0003] Traditional piecemeal formwork assembly relies solely on worker experience, resulting in insufficient tightness between adjacent formwork panels, compromised flatness, and misalignment. To ensure tight joints and prevent grout leakage, double-sided adhesive strips of sponge are applied along the joint thickness. However, since the sponge strips are elastic, they cannot be tightened properly during assembly, leading to poor leak-proof performance. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, a joint fastening device for fair-faced concrete formwork and its construction method are provided to solve the problem that the traditional loose-assembly method of formwork assembly relies solely on workers' experience to assemble the formwork, resulting in insufficient tightness of the joints between adjacent formwork sections.

[0005] To achieve the above objectives, a fastening device for joints in fair-faced concrete formwork is provided, comprising: A telescopic tube assembly spanning the outside of the joint between two adjacent templates, the telescopic tube assembly including a socket sleeve and a plug sleeve, the socket sleeve having a first end and a second end opposite to each other, the plug sleeve having a third end and a fourth end opposite to each other, the third end being movably inserted into the first end, and the fourth end extending to the outside of the first end. Anchors are provided at the second end and the fourth end respectively. The template has multiple insertion holes, which are spaced apart along the length of the joint. The two anchors on the telescopic tube assembly are detachably inserted into the insertion holes corresponding to the positions of two adjacent templates. The locking assembly includes a core rod and a pusher. The core rod is movably inserted into the insertion sleeve. One end of the core rod is fixedly connected to the insertion sleeve, and the other end of the core rod extends to the outside of the fourth end. The pusher is adjustablely installed at the other end of the core rod and presses against the fourth end to make the sides of two adjacent templates tightly abut together.

[0006] Furthermore, the core rod has an external thread, the pusher has a threaded hole, and the core rod is screwed into the threaded hole.

[0007] Furthermore, the anchor is arranged along the radial direction of the socket sleeve or the insertion sleeve.

[0008] Furthermore, the plurality of the insertion holes are arranged at equal intervals along the length direction of the seam.

[0009] Furthermore, it also includes a leveling structure for adjusting the flatness of two adjacent templates, the leveling structure being installed on the socket sleeve.

[0010] Furthermore, the leveling structure includes: A through-hole plate is inserted into the joint, with one end of the through-hole plate extending to the inside of the template and the other end of the through-hole plate being installed in the socket sleeve; A support plate is connected to one end of the through-hole plate, and the opposite sides of the support plate are respectively supported on the inner sides of two adjacent templates.

[0011] Furthermore, the other end of the through-hole plate is detachably connected to the socket sleeve.

[0012] Furthermore, two elastic pins are formed at the other end of the through-hole plate, and a notch is formed between the two elastic pins and the other end of the through-hole plate. The socket sleeve is inserted into the notch, and a locking clamp is sleeved on the outside of the two elastic pins. The locking clamp presses against the side of the socket sleeve away from the through-hole plate.

[0013] Furthermore, the distance between the two elastic pins gradually increases from the end of the elastic pin closer to the through plate towards the other end of the elastic pin farther from the through plate.

[0014] This invention provides a construction method for a joint fastening device for fair-faced concrete formwork, comprising the following steps: The telescopic tube assembly is positioned across the outside of the joint between two adjacent templates; The two anchors on the telescopic tube assembly are detachably inserted into the corresponding holes of the two adjacent templates; Adjust the position of the pusher on the core rod so that the pusher presses against the fourth end of the insertion sleeve, so that the sides of the two adjacent templates are tightly abutted together.

[0015] The beneficial effects of the present invention are that the fastening device for joints of fair-faced concrete formwork spans the joint of the formwork through the telescopic tube assembly and is fixed by the anchor and the formwork insertion hole. Combined with the locking component to apply continuous pressure, it can effectively eliminate the gap between the formwork, ensure that the joint interface is tightly fitted, significantly improve the sealing performance, and fundamentally prevent the leakage of grout during the concrete pouring process. Attached Figure Description

[0016] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a structural schematic diagram of a joint fastening device for fair-faced concrete formwork according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram illustrating the usage state of the joint fastening device for fair-faced concrete formwork according to an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the leveling structure according to an embodiment of the present invention.

[0019] Figure label: Expansion tube assembly 1, socket sleeve 11, insertion sleeve 12; Anchor 2; Locking assembly 3, core rod 31, pusher 32; Leveling structure 4, through-hole plate 41, support plate 42, elastic pin plate 43, locking clamp 44, notch a; Template 5, double-sided tape 51. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] Reference Figures 1 to 3 As shown, the present invention provides a fastening device for joints of fair-faced concrete formwork, comprising: a telescopic tube assembly 1, an anchor 2, and a locking assembly 3.

[0023] The telescopic tube assembly 1 is positioned across the outside of the joint between two adjacent templates 5. Specifically, the telescopic tube assembly 1 includes a socket sleeve 11 and a plug sleeve 12.

[0024] The socket sleeve 11 has a first end and a second end. The insertion sleeve 12 has a third end and a fourth end. The third end of the insertion sleeve 12 is movably inserted into the first end of the socket sleeve 11, and the fourth end of the insertion sleeve 12 extends to the outside of the first end of the socket sleeve 11.

[0025] Anchors 2 are connected to the second end of the socket sleeve 11 and the fourth end of the insertion sleeve 12, respectively. The template 5 has multiple insertion holes. These insertion holes are spaced apart along the length of the joint. Two anchors 2 on the expansion joint assembly 1 are detachably inserted into the corresponding insertion holes of two adjacent templates 5.

[0026] The locking component 3 is used to lock the length of the telescopic tube assembly 1. Specifically, in this embodiment, the locking component 3 includes a core rod 31 and a pusher 32.

[0027] The core rod 31 is movably inserted into the insertion sleeve 12. One end of the core rod 31 is fixedly connected to the socket sleeve 11. The other end of the core rod 31 extends to the outside of the fourth end. The pusher 32 is adjustablely installed at the other end of the core rod 31. The pusher 32 presses against the fourth end so that the sides of the two adjacent templates 5 are tightly abutted together.

[0028] In a preferred embodiment, the core rod 31 has external threads. The pusher member 32 has a threaded hole. The core rod 31 is screwed into the threaded hole.

[0029] In this embodiment, the outer diameter of the anchor is adapted to the inner diameter of the insertion hole. The anchor 2 is arranged radially along the socket sleeve 11 or the insertion sleeve 12.

[0030] To improve the width stability of the joint between the two templates, multiple insertion holes are set at equal intervals along the length of the joint.

[0031] The fastening device for joints of fair-faced concrete formwork of the present invention also includes a leveling structure 4. The leveling structure 4 is used to adjust the flatness of two adjacent formwork panels 5 to prevent misalignment at the joint of the two adjacent formwork panels. The leveling structure 4 is installed on the socket sleeve 11.

[0032] See Figure 2 and Figure 3 As shown, the leveling structure 4 includes: a seam plate 41 and a support plate 42.

[0033] A through-joint plate 41 is inserted into the joint. One end of the through-joint plate 41 extends to the inside of the template 5. The other end of the through-joint plate 41 is installed in the socket sleeve 11. A support plate 42 is connected to one end of the through-joint plate 41. The opposite sides of the support plate 42 are respectively supported on the inside of two adjacent templates 5.

[0034] In a preferred embodiment, the other end of the through-hole plate 41 is detachably connected to the socket sleeve 11.

[0035] In this embodiment, two elastic pins 43 are formed at the other end of the through-plate 41. The two elastic pins 43 and the other end of the through-plate 41 form a notch a. The socket sleeve 11 passes through the notch a. A locking clamp 44 is sleeved on the outside of the two elastic pins 43. The locking clamp 44 presses against the side of the socket sleeve 11 away from the through-plate 41.

[0036] The distance between the two elastic pins 43 gradually increases from the end of the elastic pin 43 closer to the through plate 41 towards the other end of the elastic pin 43 further away from the through plate 41.

[0037] In this embodiment, the socket sleeve is made of a thick steel pipe with a diameter of 25 mm and a wall thickness of 1.4 mm, serving as the load-bearing base and the sliding guide rail.

[0038] The insertion sleeve is made of a thin steel tube with a diameter of 20mm and a wall thickness of 1.4mm. It is nested inside a thick steel tube and forms a low-friction telescopic adjustment structure with the inner wall of the thick steel tube that can slide relative to each other along the axis.

[0039] The anchors are made of short steel bars with a diameter of Φ16mm. These short steel bars extend outward perpendicular to the axis of the insert sleeve or socket sleeve to form an insert fitting that matches the template's insertion hole, used for precise insertion into the pre-set insertion hole of the template and for load-bearing capacity transfer.

[0040] The core rod is a high-strength screw. The core rod axially penetrates the inner cavities of both the insertion sleeve and the socket sleeve. One end of the screw is rigidly connected to the inner wall or end of the socket sleeve via a fillet weld, ensuring that the screw and socket sleeve form a single unit. The other end of the screw extends beyond the insertion sleeve and is fitted with a rotatable, adjustable pusher (such as a nut).

[0041] During the tensioning operation of the template joint, torque is applied by rotating the jacking component using an electric wrench. As the jacking component rotates forward, it generates axial displacement, which in turn causes linear displacement of the end face of the insert sleeve it contacts. Under the drive of the jacking component and the guidance of the core rod, the insert sleeve slides in a controllable linear direction along the axis of the insert sleeve.

[0042] The sliding of the insert sleeve causes a change in the distance between the two templates, thereby achieving continuous, stepless, and precise adjustment of the joint spacing between the two templates. After adjustment, continue to tighten the push-pull component and press the double-sided adhesive or elastic sponge strip inside the template to ensure that the two adjacent templates are tightly fitted.

[0043] The present invention provides a fastening device for joints of fair-faced concrete formwork that can press two adjacent formworks together, so that the elastic sponge strip inside the joint is stably embedded in the joint, ensuring that there is no leakage of grout. This structure is simple to manufacture and easy to operate, and is especially suitable for fair-faced concrete projects with extremely high requirements for formwork positioning accuracy and joint stability.

[0044] This invention provides a construction method for a joint fastening device for fair-faced concrete formwork, comprising the following steps: S1. The telescopic tube assembly 1 is placed across the outside of the joint between two adjacent templates 5.

[0045] S2. The two anchors 2 on the telescopic tube assembly 1 are detachably inserted into the corresponding holes of the two adjacent templates 5.

[0046] S3. Adjust the position of the pusher 32 on the core rod 31 so that the pusher 32 presses against the fourth end of the insertion sleeve 12, so that the sides of the two adjacent templates 5 are tightly pressed together.

[0047] In this embodiment, before locking the length of the telescopic tube assembly, the through-hole plate is inserted into the joint between two adjacent templates, so that the opposite sides of the support plate are supported on the inner sides of the two templates respectively. Then, the socket sleeve of the telescopic tube assembly is inserted into the notch at one end of the through-hole plate, so that the socket sleeve is pressed against the outer side of the two templates.

[0048] After the length of the telescopic tube assembly is locked, the locking clamp is fitted outside the two elastic pin plates and pressed against the side of the socket sleeve away from the template, so that the leveling component and the telescopic tube assembly are connected together. This not only controls the width of the joint between the two templates, but also prevents misalignment at the joint between the two templates.

[0049] The present invention provides a fastening device for joints in fair-faced concrete formwork. The device uses a telescopic tube assembly to span the joint of the formwork and uses anchors to fix it in place with the formwork insertion holes. Combined with a locking component to apply continuous pressure, it can effectively eliminate gaps between formwork, ensure a tight fit at the joint interface, significantly improve sealing performance, and fundamentally prevent grout leakage during concrete pouring.

[0050] The present invention provides a leveling structure for a joint fastening device for fair-faced concrete formwork. The joint plate passes through the joint, the support plate supports the inner side of the formwork, and locks with the socket sleeve. This can accurately control the flatness of adjacent formwork, prevent concrete surface defects caused by misalignment, and improve the molding quality of fair-faced concrete.

[0051] The present invention provides a simple and convenient structure for fastening joints in fair-faced concrete formwork. It eliminates the need for repeated adjustments based on worker experience, reduces manual positioning and fine-tuning time, lowers labor intensity, and is suitable for narrow work surfaces (such as scaffolding or areas with dense reinforcement), significantly improving construction efficiency.

[0052] The joint fastening device for fair-faced concrete formwork of the present invention is reusable, reducing the reliance on consumables such as sponge strips and double-sided tape in traditional processes and reducing material waste; at the same time, it reduces the frequency of formwork handling and secondary processing, saving labor and time costs, and has significant economic advantages.

[0053] The present invention provides a sturdy and stable formwork joint fastening device for fair-faced concrete. After installation, it can effectively resist the lateral pressure and vibration generated during concrete pouring and vibration, prevent the formwork from loosening or shifting, and improve the overall construction safety. It is also applicable to various formwork types and structural forms, and has good versatility and adaptability.

[0054] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A clean concrete form joint fastening device, comprising: include: A telescopic tube assembly spanning the outside of the joint between two adjacent templates, the telescopic tube assembly including a socket sleeve and a plug sleeve, the socket sleeve having a first end and a second end opposite to each other, the plug sleeve having a third end and a fourth end opposite to each other, the third end being movably inserted into the first end, and the fourth end extending to the outside of the first end. Anchors are provided at the second end and the fourth end respectively. The template has multiple insertion holes, which are spaced apart along the length of the joint. The two anchors on the telescopic tube assembly are detachably inserted into the insertion holes corresponding to the positions of two adjacent templates. The locking assembly includes a core rod and a pusher. The core rod is movably inserted into the insertion sleeve. One end of the core rod is fixedly connected to the insertion sleeve, and the other end of the core rod extends to the outside of the fourth end. The pusher is adjustablely installed at the other end of the core rod and presses against the fourth end to make the sides of two adjacent templates tightly abut together.

2. The fastening device for joints in fair-faced concrete formwork according to claim 1, characterized in that, The core rod has an external thread, and the pusher has a threaded hole, in which the core rod is screwed.

3. The fastening device for joints in fair-faced concrete formwork according to claim 1, characterized in that, The anchor is arranged along the radial direction of the socket sleeve or the insertion sleeve.

4. The fastening device for joints in fair-faced concrete formwork according to claim 1, characterized in that, The plurality of the insertion holes are arranged at equal intervals along the length of the seam.

5. The fastening device for joints in fair-faced concrete formwork according to claim 1, characterized in that, It also includes a leveling structure for adjusting the flatness of two adjacent templates, the leveling structure being installed on the socket sleeve.

6. The fastening device for joints in fair-faced concrete formwork according to claim 5, characterized in that, The leveling structure includes: A through-hole plate is inserted into the joint, with one end of the through-hole plate extending to the inside of the template and the other end of the through-hole plate being installed in the socket sleeve; A support plate is connected to one end of the through-hole plate, and the opposite sides of the support plate are respectively supported on the inner sides of two adjacent templates.

7. The fastening device for joints in fair-faced concrete formwork according to claim 6, characterized in that, The other end of the through-hole plate is detachably connected to the socket sleeve.

8. The fastening device for joints in fair-faced concrete formwork according to claim 7, characterized in that, Two elastic pins are formed at the other end of the through-hole plate. The two elastic pins and the other end of the through-hole plate form a notch. The socket sleeve passes through the notch. A locking clamp is sleeved on the outside of the two elastic pins. The locking clamp presses against the side of the socket sleeve away from the through-hole plate.

9. The fastening device for joints in fair-faced concrete formwork according to claim 8, characterized in that, The distance between the two elastic pins gradually increases from the end of the elastic pin closer to the through plate to the other end of the elastic pin farther from the through plate.

10. A construction method for a joint fastening device for fair-faced concrete formwork as described in any one of claims 1 to 9, characterized in that, Includes the following steps: The telescopic tube assembly is positioned across the outside of the joint between two adjacent templates; The two anchors on the telescopic tube assembly are detachably inserted into the corresponding holes of the two adjacent templates; Adjust the position of the pusher on the core rod so that the pusher presses against the fourth end of the insertion sleeve, so that the sides of the two adjacent templates are tightly abutted together.

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