Formwork unit

Abstract

The instant disclosure provides a formwork unit, including a first formwork and a second formwork opposing to the first formwork. The sides of the first formwork and the second formwork respectively include at least one first positioning hole and at least one second positioning hole. The formwork unit further includes a connecting element. The connecting element comprises a first connecting member, which includes a first connecting hole and a second connecting hole configured to detachably engage with the first positioning hole of the first formwork; a second connecting member, which includes a third connecting hole configured to detachably engage with the second positioning hole of the second formwork; and an intermediate element, connected between the first connecting member and the second connecting member. When the first formwork and the second formwork are in a first state, the first connecting member is connected to the first positioning hole via the first connecting hole, providing a first spacing between the first formwork and the second formwork, and when the first formwork and the second formwork are in a second state, the first connecting member is connected to the first positioning hole via the second connecting hole, providing a second spacing different from the first spacing.

Description

Building formwork unit This disclosure relates to providing a building formwork unit. With the changing demographics of society, the construction industry is facing a severe labor shortage due to population aging and declining birth rates. Statistics show that the labor gap in the construction industry has been widening in recent years, leading to a significant increase in wage costs and putting greater operational pressure on construction companies. Building projects in the construction industry often require the construction of formwork, which must be shaped according to design requirements during concrete pouring and hardening, and withstand the weight and pressure of the construction process. Among various types of formwork, traditional wooden formwork has a complex assembly and connection method, requiring workers to invest a significant amount of time in learning, making it difficult to master the construction techniques of wooden formwork in a short period. Therefore, the level of worker proficiency directly impacts project progress and quality. Limited by the inherently poor strength and durability of wooden formwork, deformation or damage may occur when dealing with complex building structures. Furthermore, wood easily absorbs water, affecting the setting quality of concrete. After completion, wooden formwork is often difficult to reuse, resulting in resource waste and increased construction costs. In addition, after the completion of concrete structures constructed using traditional wooden formwork, additional mortar work is required to smooth the concrete surface, not only increasing project costs but also potentially degrading the quality of the construction environment. Therefore, in order to solve the above problems, one of the objectives of this disclosure is to provide an innovative building formwork unit that replaces part or all of the wooden formwork with metal formwork (such as aluminum formwork) and connects two formworks through connecting elements with adjustable fixing point spacing, so as to effectively solve many problems existing in the prior art. According to one embodiment of this disclosure, a building formwork unit includes: a first formwork and a second formwork, wherein a first inner surface of one of the first formworks and a second inner surface of one of the second formworks are disposed opposite to each other; the first formwork has at least one first positioning hole on a first side edge adjacent to the first inner surface, and the second formwork has at least one second positioning hole on a second side edge adjacent to the second inner surface; and a connecting element configured to connect the first formwork and the second formwork, the connecting element including: a first engaging piece, which includes a first connecting hole configured to be separably engaged with the first positioning hole of the first formwork via a fastener and a second... A first connecting piece; a second connecting piece including a third connecting piece configured to be separably engaged with a second positioning hole of a second template via a system; and an intermediate element connected between the first connecting piece and the second connecting piece; wherein when the first template and the second template are in a first state, the first connecting piece engages with the first positioning hole via the first connecting piece through a system, and there is a first gap between the first template and the second template, and wherein when the first template and the second template are in a second state, the first connecting piece engages with the first positioning hole via the second connecting piece through a system, and there is a second gap between the first template and the second template that is different from the first gap. According to another embodiment of this disclosure, the building formwork unit includes: a first formwork and a second formwork, wherein a first inner surface of one of the first formworks and a second inner surface of one of the second formworks are disposed opposite to each other, and a first side edge of one of the first inner surfaces of the first formwork includes at least one first positioning hole, and a second side edge of one of the second inner surfaces of the second formwork includes at least one second positioning hole; and a connecting element configured to connect the first formwork and the second formwork, the connecting element including: a first engaging piece, one outer end of which includes a first connecting hole configured to be separably engaged with the first positioning hole of the first formwork via a fastener, and one inner end of which includes a first engaging structure. A second connecting piece, one outer side of which includes a second connection hole configured to detachably engage with a second positioning hole of a second template via a fastener, and one inner end of which includes a second engaging structure; and an intermediate element, both ends of which are configured to connect to the first engaging structure of a first connecting element and the second engaging structure of a second connecting element; wherein when the first template and the second template are in a first state, the intermediate element has a first length to fix a first gap between the first template and the second template; and wherein when the first template and the second template are in a second state, the intermediate element has a second length different from the first length to fix a second gap between the first template and the second template. According to another embodiment of this disclosure, a building formwork unit includes an aluminum formwork and a wooden formwork, wherein a first inner surface of one of the aluminum formwork and a second inner surface of one of the wooden formwork are disposed opposite to each other, and a first side edge of one of the first inner surfaces of the aluminum formwork includes at least one first positioning hole; a first connecting piece, one outer end of which includes a first connecting hole configured to be separably engaged with the first positioning hole of the first formwork via a fastener; an intermediate element, which is elongated; an insert that passes through the wooden formwork and has an inner end and an outer end; a first connecting element, both ends of which include a first connecting structure and a second connecting structure arranged axially along one of the first connecting pieces, the first connecting piece engaging the first connecting structure, and one end of the intermediate element engaging the second connecting structure; a second connecting element, both ends of which include a third connecting structure and a fourth connecting structure arranged axially along one of the inserts, the inner end of the insert engaging the third connecting structure in a separable manner, and the other end of the intermediate element being configured to engage the fourth connecting structure. The formwork unit disclosed in this embodiment uses a metal formwork as one of its two templates, which are connected by connecting elements with adjustable fixing point spacing. Compared to wooden formwork, metal formwork has higher strength, and due to its non-absorbent nature, it ensures the stability of the concrete mix ratio and facilitates subsequent reuse. Furthermore, the flexible adjustment of the spacing between the templates via the connecting elements allows the formwork unit to be applied to complex building structures. On the other hand, the concrete structure formed by the metal formwork has a smooth and flat surface, eliminating the need for additional mortar preparation and allowing for direct subsequent work such as plastering, painting, or tile application, greatly simplifying the construction process and saving labor costs. To better understand the features, content, advantages, and effects of this disclosure, the following detailed description is provided in conjunction with the accompanying drawings and in the form of embodiments. The drawings used are for illustrative purposes only and to assist in the description. Therefore, the scope of this disclosure should not be interpreted or limited based on the proportions and arrangement of the accompanying drawings. The terms "a" or "an" used herein are for describing the elements and components disclosed herein. These terms are used for convenience of description and to give the basic concept of the disclosure. This description should be understood to include one or at least one, and unless explicitly stated otherwise, the singular includes the plural. When used in the claims and with the word "comprising," the term "a" may mean one or more. Furthermore, the term "or" used herein means "and / or." Unless otherwise specified, spatial descriptions such as "above," "below," "upward," "left," "right," "downward," "body," "base," "vertical," "horizontal," "side," "higher," "lower," "upper," "above," and "below" are used to indicate the orientation shown in the figures. It should be understood that the spatial descriptions used herein are for illustrative purposes only, and actual implementations of the structures described herein can be spatially configured in any relative orientation without altering the advantages of the disclosed embodiments. For example, in the description of some embodiments, providing an element "on" another element can encompass a preceding element directly on a subsequent element (e.g., a situation where the preceding element is in physical contact with the subsequent element, and a situation where one or more intervening elements are located between the preceding and subsequent elements). As used herein, the terms “approximately,” “substantial,” “substantial,” and “about” are used to describe and consider minor variations. When used in conjunction with an event or situation, these terms may mean an event or situation that has clearly occurred or an event or situation that is very close to occurring. Figure 1 shows a schematic diagram of the building formwork unit 1 in a first state according to the first embodiment of this disclosure. Figure 2 shows a schematic diagram of the building formwork unit 1 in a second state according to the first embodiment of this disclosure. Referring to Figures 1 and 2, the building formwork unit 1 includes a first formwork 10, a second formwork 20, and a connecting element 30. The first formwork 10 has a first inner surface 11, and the second formwork 20 has a second inner surface 21. The first inner surface 11 of the first formwork 10 and the second inner surface 21 of the second formwork 20 face each other. A plurality of first positioning holes 15 are provided on a first side edge 12 of the first formwork 10 adjacent to the first inner surface 11, and the first positioning holes 15 are arranged sequentially in the longitudinal direction. The structure of the second formwork 20 is similar to that of the first formwork 10, having a second side edge 22 adjacent to the second inner surface 21, and a plurality of second positioning holes 25 are also provided on the second side edge 22, arranged sequentially in the longitudinal direction. By selecting the first positioning hole 15 and the corresponding second positioning hole 25 at a specific height on the first side edge 12 of the first template 10 and the second side edge 22 of the second template 20, the connecting element 30 can be installed at a specific height position as needed, so that the two ends of the connecting element 30 are connected to the first positioning hole 15 and the corresponding second positioning hole 25, thereby fixing the distance between the first template 10 and the second template 20, and pouring concrete between them to form a concrete structure 50 therebetween. The connecting element 30 includes a first connecting piece 310, a second connecting piece 320, and an intermediate element 60 connecting the two. The first connecting piece 310 has a first connecting hole 311 and a second connecting hole 312, which are detachably connected to the first template 10 via a fastener 40 from the first positioning hole 15. The second connecting piece 320 has a third connecting hole 321, which is detachably connected to the second positioning hole 25 of the second template 20 via the fastener 40. The intermediate element 60 is connected between the inner end 319 of the first connecting piece 310 and the inner end 329 of the second connecting piece 320. The first connecting piece 310, the intermediate element 60, and the second connecting piece 320 are sequentially arranged and connected along the axial direction of the connecting element 30. In some embodiments, the first connecting piece 310, the intermediate element 60, and the second connecting piece 320 of the connecting element 30 are integrally formed sheet metal parts to provide sufficient strength and stability for the connecting element. In some embodiments, the widths of the first and second connecting pieces 310 and 320 of the connecting element 30 are wider than those of the intermediate element 60 to enhance the connection area between the first and second connecting pieces 310 and 320 and the template, ensuring stability and safety during construction. The fastener 40 can be any reusable fastening element, such as screws, bolts, etc. Taking the construction of a wall of width G using formwork unit 1 as an example, the steps are shown in Figure 1. First, the first connecting hole 311 of the first connecting piece 310 is aligned with the first positioning hole 15 of the first template 10, and connected to the first template 10 using a fastener 40. Second, the third connecting hole 321 of the second connecting piece 320 is aligned with the second positioning hole 25 of the second template 20, and connected to the second template 20 using a fastener 40. By design, the distance between the first template 10 and the second template 20 after connection is a first distance W1. After fixing the first template 10 and the second template 20, concrete is poured between the first template 10 and the second template 20 to form a concrete structure 50. After the concrete has solidified, the formwork unit is removed, resulting in a wall of width G formed between the first template 10 and the second template 20. When constructing a wall with a width G' that is wider than width G using building formwork unit 1, as shown in Figure 2, the second connecting hole 312 of the first connecting piece 310 is aligned with the first positioning hole 15, and connected to the first formwork 10 using fastener 40; and the third connecting hole 321 of the second connecting piece 320 is aligned with the second positioning hole 25 of the second formwork 20, and connected to the second formwork 20 using fastener 40. By design, the distance between the first formwork 10 and the second formwork 20 after connection is the second distance W2. The second distance W2 is greater than the first distance W1. After fixing the first formwork 10 and the second formwork 20, concrete is poured into the space between the first formwork 10 and the second formwork 20. After the concrete solidifies, the formwork unit is removed to form a concrete structure 50' with a width G'. In other embodiments disclosed herein, the number of holes on the first connecting piece 310 and the second connecting piece 320 can be adjusted as needed. For example, the first connecting piece 310 and the second connecting piece 320 may include two or more holes arranged along the axial direction of the connecting element 30, so that the connecting element 30 can be used for the construction of more different designed wall thicknesses. In some embodiments disclosed herein, the first connecting piece 310 and the second connecting piece 320 may include a plurality of holes arranged perpendicular to their axial direction to simultaneously mate with a plurality of positioning holes provided in the longitudinal direction on the template, and be connected by a plurality of fasteners 40 to further enhance the overall strength of the template unit. In the embodiments shown in Figures 1-2, since walls of different thicknesses and strengths can be manufactured using the same building formwork unit 1, construction costs can be reduced. Furthermore, because the building formwork unit 1 is easy to assemble and can be quickly combined and disassembled, construction time can be reduced. Figure 3 shows a schematic diagram of the building formwork unit 1a in the first state according to the second embodiment of this disclosure. Figure 4 shows a schematic diagram of the building formwork unit 1a in the second state according to the second embodiment of this disclosure. In the embodiments of Figures 3-4, the connecting element 30 in the embodiments of Figures 1-2 is replaced by a connecting element 30a to fix the first formwork 10 and the second formwork 20. In some embodiments, the connecting element 30a includes a first engaging tab 310a, a second engaging tab 320a, and an intermediate element 60a. The first engaging tab 310a includes a first body 313a and a first extension 314a. The first body 313a has an outer end 318a and includes a first connection hole 311a therein, which is configured to detachably engage with a first positioning hole 15 of the first template 10 via a fastener 40. The first extension 314a has an inner end 319a and includes a set of holes 315a therein as a first engagement structure. The second coupling piece 320a includes a second body 323a and a second extension 324a. The second body 323a has an outer end 328a and includes a second connection hole 321a therein, which is configured to detachably engage with the second positioning hole 25 of the second template 20 via the fastener 40. The second extension 324a has an inner end 329a and includes a set of holes 325a therein as a second coupling structure. The intermediate element 60a is a rod of a certain length, including an extension 61a and hooks 62a at both ends of the extension. During operation, the extension 61a extends axially along the connecting element 30a, defining the overall length of the connecting element 30a, and thus determining the distance between the first template 10 and the second template 20 based on the overall length of the connecting element 30a. Therefore, intermediate elements 60a of different lengths can be manufactured according to the wall thickness requirements. The cross-sectional shape of the extension 61a can be designed as circular, square, or other shapes as needed to adapt to different construction environments. The hook 62a is configured to engage with the sleeve hole 315a of the first connecting piece 310a or the sleeve hole 325a of the second connecting piece 320a. In an exemplary embodiment, the hook 62a is barbed or grooved to facilitate reliable engagement with the sleeve holes 315a and 325a on the first connecting piece 310a and the second connecting piece 320a. The hook design ensures the stability of the connection, withstands the lateral pressure during concrete pouring, and prevents formwork movement or deformation. The intermediate element 60a can be made of high-strength metal materials, such as aluminum alloy, carbon steel, stainless steel, etc. To improve corrosion resistance and wear resistance, it can be surface treated, such as hot-dip galvanizing or powder coating. When constructing a wall of a specific width / thickness using connecting element 30a, as shown in Figure 3, an intermediate element 60a with a first length is selected according to the design. The hooks 62a of the intermediate element 60a are connected to the sleeve holes 315a of the first connecting piece 310a and the sleeve holes 325a of the second connecting piece 320a, respectively. At this time, the distance between the first template 10 and the second template 20 is the first distance W1. When a thicker wall needs to be constructed, as shown in Figure 4, an intermediate element 60a' with a second length is selected according to the design, and the length of its extension 61a' is greater than the length of the extension 61a, so as to increase the distance between the templates to the second distance W2. The second distance W2 is greater than the first distance W1. In some embodiments, when the hooks 62a, 62a' engage with the sleeve holes 315a, 325a on the connecting pieces, the connection can be completed simply by inserting the hooks into the sleeve holes and rotating them slightly, without the need for additional tools or fasteners. Alternatively, to further improve the connection strength, a spring plate or washer can be added at the joint between the hook and the sleeve hole to prevent loosening caused by gaps. In the embodiment shown in Figures 3-4, the spacing between the first template 10 and the second template 20 can be adjusted by replacing intermediate elements 60a and 60a' of different lengths to meet the construction requirements of walls of different thicknesses. Furthermore, since the intermediate elements 60a and 60a' can be quickly assembled and separated from the first connecting piece 310a and the second connecting piece 320a, it facilitates rapid adjustment of the template spacing and ease of assembly. Figure 5 shows an exploded view of the connecting element 30b in the third embodiment of this disclosure. Figure 6 shows a cross-sectional schematic diagram of the connecting element 30b in the third embodiment of this disclosure. This disclosure further proposes another embodiment of the connecting element 30b for fixing the first template 10 and the second template 20. The connecting element 30b includes a first connecting piece 310b, a second connecting piece 320b, and an intermediate element 60b. The first engaging piece 310b includes a first body 313b and a first extension 314b extending from the first body 313b toward the intermediate element 60b. The first body 313b has an outer end 318b and includes a first receiving hole 311b therein, which is configured to be detachably engaged with the first positioning hole 15 (FIG. 3) of the first template 10 via the fastener 40. The first extension 314b has an inner end 319b and a lug 315b extending perpendicularly to the first extension 314b and having a through hole 3151 (FIG. 6). The through hole 3151 is adjacent to the end of the lug 315b as the first engaging structure. The second connecting piece 320b includes a second body 323b and a second extension 324b extending from the second body 323b toward the intermediate element 60b. The second body 323b has an outer end 328b and includes a second connection hole 321b therein, which is configured to be separably engaged with the second positioning hole 25 (FIG. 3) of the second template 20 via the fastener 40. The second extension 324b has an inner end 329b with a lug 325b extending perpendicularly to the second extension 324b and having a through hole 3151 (FIG. 6). The through hole 3151 is adjacent to the end of the lug 315b as a second connecting structure. The intermediate element 60b is a rod of a certain length and includes an extension 61b. During operation, the extension 61b extends axially along the connecting element 30b and defines the overall length of the connecting element 30b. The distance between the first template 10 and the second template 20 (Figure 3) is determined by pre-selecting the overall length of the connecting element 30b. Therefore, intermediate elements 60b of different lengths can be manufactured according to the wall thickness requirements. The cross-sectional shape of the extension 61b can be designed as circular, square, or other shapes as needed to adapt to different construction environments. In some embodiments disclosed herein, each end of the extension 61b includes two slots 610b corresponding to the lugs 315b on the first extension 314b of the first connecting piece 310b or the lugs 325b on the second extension 324b of the second connecting piece 320b. The intermediate element 60b further includes two pins 63b. When the intermediate element 60b is engaged with the first connecting piece 310b and the second connecting piece 320b, as shown in FIG. 6, the lugs 315b and 325b pass through the slots 610b at both ends of the intermediate element 60b, such that the through holes 3151 of the lugs 315b and 325b are exposed outside the slots 610b. After the lugs 315b and 325b pass through the slots 610b of the intermediate element 60b, the pins 63b are inserted into the through holes of the lugs, forming a reliable mechanical connection capable of withstanding large shear and tensile forces. The pin 63b can be secured using a tight fit or other suitable method to prevent it from falling off or moving. Once the pin 63b is secured, the first connecting piece 310b, the intermediate element 60b, and the second connecting piece 320b are firmly connected. When removal is required, simply pull out the pin 63b to separate the intermediate element 60b from the connecting piece; the procedure is quick and simple. In the embodiments shown in Figures 5-6, the spacing between templates can be adjusted by replacing intermediate elements 60b of different lengths to meet the construction requirements of walls of different thicknesses. Furthermore, the intermediate element 60b, the first connecting piece 310b, and the second connecting piece 320b can be quickly assembled and separated, facilitating rapid adjustment of the template spacing and ease of assembly. Figure 7 shows an exploded view of the connecting element 30c in the fourth embodiment of this disclosure. Figure 8 shows a schematic diagram of the connecting element 30c assembled in the fourth embodiment of this disclosure. In some embodiments of this disclosure, the connecting element 30c includes a first bonding piece 310c, a second bonding piece 320c, and an intermediate element 60c to fix the first template 10 and the second template 20. The first engaging piece 310c includes a first body 313c and a first pillar 315c extending from the first body 313c toward the intermediate element 60c. The first body 313c has an outer end 318c and includes a first receiving hole 311c therein, which is configured to be detachably engaged with the first positioning hole 15 (FIG. 3) of the first template 10 via the fastener 40. The first pillar 315c is located at the inner end of the first engaging piece 310c and has an external thread 316c on its surface as a first engaging structure. The second engaging piece 320c includes a second body 323c and a second pillar 325c extending from the second body 323c toward the intermediate element 60c. The second body 323c has an outer end 328c and includes a second receiving hole 321c therein, configured to be detachably engaged with the second positioning hole 25 (FIG. 3) of the second template 20 via the fastener 40. The second pillar 325c is located at the inner end of the second engaging piece 320c and has an external thread 326c on its surface as a second engaging structure. The first connecting element 64c and the second connecting element 65c are both approximately truncated conical in shape. The bottom 641c of the first connecting element 64c has internal threads 643c and 644c, serving as the first connecting structure; the top 642c also has internal threads 644c, serving as the second connecting structure. The bottom 651c and the top 652c of the second connecting element 65c also have internal threads 653c and 654c, serving as the third and fourth connecting structures, respectively. Intermediate element 60c is a rod of a certain length, including an extension 61c and a third post 611c and a fourth post 612c with external threads 613c and 614c connecting the two ends of the extension. Intermediate element 60c is usually made of high-strength alloy steel to withstand high connection stress. During assembly, the external thread 316c of the first post 315c of the first connecting piece 310c mates with the bottom internal thread 643c of the first connecting element 64c. Then, the external thread 613c of the third post 611c of the intermediate element 60c mates with the top internal thread 644c of the first connecting element 64c. Similarly, the external thread 326c of the second post 325c of the second connecting piece 320c mates with the bottom internal thread 653c of the second connecting element 65c. The external thread 614c of the fourth post 612c of the intermediate element 60c mates with the top internal thread 654c of the second connecting element 65c. The threaded connection between the intermediate element 60c and the first connecting piece 310c and the second connecting piece 320c has at least the following technical advantages: After the intermediate element 60c connects the first connecting piece 310c and the second connecting piece 320c, the threaded connection depth between the intermediate element 60c and the connecting element can be adjusted by rotating the intermediate element 60c, which allows for fine-tuning of the template spacing and meets the needs of precision construction. Furthermore, due to the excellent mechanical properties of the threaded connection, it can withstand high tensile and compressive forces, making it suitable for the construction of large structures. In some embodiments, the intermediate element 60c further includes elements such as a nut and a spring washer to further restrict the rotation of the first connecting element 64c and the second connecting element 65c, improving the connection stability between the intermediate element 60c and the first connecting piece 310c and the second connecting piece 320c. In the embodiment shown in Figures 7-8, the spacing between templates can be adjusted by replacing intermediate elements 60c of different lengths to meet the construction requirements of walls of different thicknesses. Furthermore, since the intermediate element 60c can be quickly assembled and separated from the first connecting piece 310c and the second connecting piece 320c, it facilitates rapid adjustment of the template spacing and ease of assembly. Figure 9 shows a schematic diagram of a building formwork unit 1d according to the fifth embodiment of this disclosure. The building formwork unit 1d includes a first formwork 10, a second formwork 70, and a connecting element 30d. In one embodiment, the first formwork 10 is an aluminum formwork and has a first inner surface 11. The second formwork 70 is a wooden formwork and has a second inner surface 71. The first inner surface 11 of the first formwork 10 faces the second inner surface 71 of the second formwork 70. A plurality of first positioning holes 15 are provided on a first side edge 12 of the first formwork 10 adjacent to the first inner surface 11, and the first positioning holes 15 are arranged sequentially along the longitudinal direction. In building construction, different parts have different performance requirements for formwork. Structural load-bearing parts require high-strength, high-durability formwork, while non-structural load-bearing parts can use lower-cost formwork. Aluminum formwork has advantages such as high strength, light weight, and high reusability, and can be used for main structural parts; wooden formwork, due to its low cost and ease of processing, is suitable for secondary structures or parts with special shape requirements. Therefore, in this embodiment, the second template 70 is made of wood, which has the advantages of being lightweight and easy to process, thus meeting the requirements for complex template shapes. On the other hand, since the first template 10 is made of aluminum, structural strength can be maintained at the same time. The connecting element 30d includes a first engaging piece 310c, an intermediate element 60d, and an insert 33d connected in sequence. The structural features of the first engaging piece 310c are the same as those of the first engaging piece 310c provided in the embodiment of Figures 6-7, and therefore will not be repeated. The insert 33d passes through the second template 70 and has an outer end 338d and an inner end 339d. The inner end 339d of the insert 33d is provided with external threads for connection. The intermediate element 60d includes an elongated rod with external threads 611d and 612d at both ends. Furthermore, the intermediate element 60d further includes a first connecting element 64c and a second connecting element 65c as provided in the embodiment of Figures 6-7. During assembly, the first template 10 is first connected to the first connecting piece 310c, wherein the first connecting hole 311c of the first connecting piece 310c is aligned with the first positioning hole 15 of the first template 10, and fasteners 40 such as bolts or screws are used for connection to fix the first connecting piece 310c to the first template 10. Next, the insert 33d is inserted through the second template 70 along the thickness direction of the second template 70, so that its inner end 339d is exposed on the second inner surface 71 of the second template 70. After the first engaging piece 310c and the insert 33d are installed, the external thread of the first post 315c of the first engaging piece 310c is engaged with the bottom internal thread 643c of the first connecting element 64c. Then, the external thread 611d of one end of the intermediate element 60d is engaged with the top internal thread 644c of the first connecting element 64c. Similarly, the external thread of the inner end 339d of the insert 33d is engaged with the bottom internal thread 653c of the second connecting element 65c. The external thread 612d of the other end of the intermediate element 60d is engaged with the top internal thread 654c of the second connecting element 65c. The threaded connection between the intermediate element 60d and the first connecting piece 310c and the insert 33d has at least the following technical advantages: After the intermediate element 60d connects the first connecting piece 310c and the insert 33d, the threaded connection depth between the intermediate element 60d and the first connecting element 64c and the second connecting element 65c can be adjusted by rotating the intermediate element 60d, thus enabling fine-tuning of the template spacing to meet the needs of precision construction. Furthermore, due to the excellent mechanical properties of the threaded connection, it can withstand high tensile and compressive forces, making it suitable for the construction of large structures. In some embodiments, the intermediate element 60d further includes elements such as a nut and a spring washer to further restrict the rotation of the first connecting element 64c and the second connecting element 65c, improving the connection stability between the intermediate element 60d and the first connecting piece 310c and the insert 33d. Figure 10 shows a schematic diagram of the building formwork unit 1e in the sixth embodiment of this disclosure. The difference between the building formwork unit 1e and the building formwork unit 1d in Figure 9 is that the connecting element 30d of the building formwork unit 1d is replaced by the connecting element 30e. In some embodiments, the connecting element 30e includes a first connecting piece 310e, a first connecting element 64e, an intermediate element 60e, and a second connecting element 65c provided in the embodiment of Figures 6-7. The first connecting piece 310e has a first receiving hole 311e adjacent to its outer end 318e, for being detachably connected to the first template 10 via a fastener 40 from the first positioning hole 15 of the first template 10. The outer end 641e of the first connecting element 64e is connected to the inner end 319e of the first connecting piece 310e, and its width gradually decreases from the inner end 319e, ending at its inner end 642e, thus forming a tapered structure. The first end 611e of the intermediate element 60e is connected to the inner end 642e of the first connecting element 64e, and its second end 612e has an external thread, which engages with the top internal thread 654c of the second connecting element 65c. The first connecting piece 310e, the first connecting element 64e, and the intermediate element 60e can be integrally molded. The formwork unit disclosed in this embodiment has several advantages. First, the formwork unit is highly adjustable, allowing for flexible adjustment of the formwork spacing, making it suitable for construction of walls of varying thicknesses. Second, the formwork unit is easy to install; the connecting pieces and intermediate components can be quickly installed and disassembled, reducing construction difficulty and improving efficiency. Furthermore, the formwork unit has a stable structure, enhancing connection strength and ensuring stability and safety during construction. Moreover, because the formwork unit is reusable, it combines economic and environmental advantages, meeting various construction needs while reducing costs, increasing efficiency, and conforming to sustainable development requirements. The above embodiments are only for illustrating the technical ideas and features disclosed herein. Their purpose is to enable those skilled in this art to understand the content of this disclosure and implement it accordingly. They should not be used to limit the patent scope of this disclosure. Equivalent changes or modifications made in accordance with the spirit of this disclosure should still be covered within the patent scope of this disclosure. 1, 1a, 1b, 1c, 1d, 1e: Building formwork unit; 10: First formwork / aluminum formwork; 11: First inner surface; 12: First side edge; 15: First positioning hole; 20: Second formwork; 21: Second inner surface; 22: Second side edge; 25: Second positioning hole; 30, 30a, 30b, 30c, 30d, 30e: Connecting element; 33d: Insert; 40: Tie; 50, 50': Concrete structure; 60, 60a, 60a', 60b, 60c, 60d, 60e: Intermediate element; 61a 61a', 61b, 61c, 61d: Extensions; 62a, 62a': Hooks; 63b: Pins; 64c, 64e: First connecting element; 65c: Second connecting element; 70: Second template / wooden template; 71: Second inner surface; 310, 310a, 310b, 310c, 310e: First connecting piece; 311, 311a, 311b, 311c, 311e: First connecting hole; 312: Second connecting hole; 313a, 313e: [Missing information - likely a typo or incomplete sentence] 13b, 313c: First body; 314a, 314b: First extension; 315a: Sleeve hole; 315b: Lug; 315c: First pillar; 316c: External thread; 318, 318a, 318b, 318c, 318e: Outer ends; 319, 319a, 319b, 319c, 319e: Inner ends; 320, 320a, 320b, 320c: Second mating piece; 321a, 321b, 321c: Second connecting holes 323a, 323b, 323c; Second body 328, 328a, 328b, 328c; Outer ends 329, 329a, 329b, 329c; Inner end 321; Third connecting holes 324a, 324b; Second extension 325a; Sleeve hole 325b; Lug 325c; First post 326c; External thread 338d; Outer end 339d; Inner end 610b; Slot 611c; Third post Body 611e: First end 612c: Fourth column 612e: First end 613c, 614c, 611d, 612d: External thread 641c: Bottom 641e: Outer end 642c: Top 642e: Inner end 643c: Internal thread 644c: Internal thread 651c: Bottom 652c: Top 653c: Internal thread 654c: Internal thread 3151: Through hole G, G': Width W1: First spacing W2: Second spacing Figure 1 shows a schematic diagram of the building formwork unit in the first embodiment of this disclosure when it is set in the first state. Figure 2 shows a schematic diagram of the building formwork unit in the second state in the first embodiment of this disclosure. Figure 3 shows a schematic diagram of the building formwork unit in the first state as shown in the second embodiment of this disclosure. Figure 4 shows a schematic diagram of the building formwork unit in the second embodiment of this disclosure when it is set in the second state. Figure 5 shows an exploded view of the connecting element in the third embodiment of this disclosure. Figure 6 shows a cross-sectional schematic diagram of the connecting element in the third embodiment of this disclosure. Figure 7 shows an exploded view of the connecting element in the fourth embodiment of this disclosure. Figure 8 shows a schematic diagram of the connecting elements in the fourth embodiment of this disclosure. Figure 9 shows a schematic diagram of the building formwork unit in the fifth embodiment of this disclosure. Figure 10 shows a schematic diagram of the building formwork unit in the sixth embodiment of this disclosure. 1: Building formwork unit 10: First formwork / aluminum formwork 11: First inner surface 12: First lateral edge 15: First positioning hole 20: Second Template 21: Second inner surface 22: Second lateral edge 25: Second positioning hole 30: Connecting elements 40: Series 50: Concrete Structure 60: Intermediate components 310: First joint piece 311: First connector 312: Second connector 318: Outer end 319: Inner end 320: Second bonding piece 321: Third connector 328: Outer end 329: Inner end G: Width W1: First spacing

Claims

1. A building formwork unit, comprising: A first template and a second template, wherein a first inner surface of one of the first templates and a second inner surface of one of the second templates are disposed opposite to each other, the first template includes at least one first positioning hole on a first side edge adjacent to the first inner surface, and the second template includes at least one second positioning hole on a second side edge adjacent to the second inner surface. The first template and the second template are configured to connect the first template and the second template. The connecting element includes: a first connecting piece including a first connecting hole and a second connecting hole configured to be separably engaged with the first positioning hole of the first template via a system; a second connecting piece including a third connecting hole configured to be separably engaged with the second positioning hole of the second template via a system; and an intermediate element connected between the first connecting piece and the second connecting piece; wherein when the first template and the second template are in a first state, the first connecting piece engages with the first positioning hole via the first connecting hole via a system, and the first template and the second template have a first gap; and wherein when the first template and the second template are in a second state, the first connecting piece engages with the first positioning hole via the second connecting hole via a system, and the first template and the second template have a second gap different from the first gap. The building formwork unit as described in claim 1, wherein the first joint is closer to the third joint than the second joint, and the second spacing is greater than the first spacing. The building formwork unit as described in claim 1 or 2, wherein the first connecting piece, the intermediate element and the second connecting piece are integrally formed to constitute a sheet metal part. A building formwork unit, comprising: A first template and a second template, wherein a first inner surface of one of the first templates and a second inner surface of one of the second templates are disposed opposite to each other, and the first template includes at least one first positioning hole on a first side edge adjacent to the first inner surface, and the second template includes at least one second positioning hole on a second side edge adjacent to the second inner surface. The system also includes a connecting element configured to connect the first template and the second template. The connecting element comprises: a first engaging piece, one outer end of which includes a first connecting hole configured to detachably engage with the first positioning hole of the first template via a fastener, and one inner end of which includes a first engaging structure; a second engaging piece, one outer outer end of which includes a second connecting hole configured to detachably engage with the second positioning hole of the second template via a fastener, and one inner end of which includes a second engaging structure; and an intermediate element configured at both ends to connect to the first engaging structure of the first engaging piece and the second engaging structure of the second engaging piece; wherein when the first template and the second template are in a first state, the intermediate element has a first length to fix a first gap between the first template and the second template; and wherein when the first template and the second template are in a second state, the intermediate element has a second length different from the first length to fix a second gap between the first template and the second template. The first and second coupling structures are a single hole, and each end of the intermediate element includes a hook, which is configured to engage with the single hole of the first coupling piece or the single hole of the second coupling piece. As described in claim 4, the building template unit, wherein the first joint structure and the second joint structure each have a lug with a through hole therein, and wherein the two ends of the intermediate element each include two slots corresponding to the lug of the first joint piece or the lug of the second joint piece, and the intermediate element further includes two pins, wherein when the intermediate element is engaged with the first joint piece and the second joint piece, the lugs of the first joint piece and the second joint piece pass through the slots at both ends of the intermediate element, and the through holes of the lugs are exposed outside the two slots at both ends of the intermediate element, and the two pins are inserted into the through holes of the lugs. The building formwork unit as described in claim 4, wherein the connecting element further comprises: A first connecting element having a first connecting structure and a second connecting structure arranged axially along one of the first connecting pieces at both ends, the first connecting piece being detachably connected to the first connecting structure, and an intermediate element being detachably connected to the second connecting structure; a second connecting element having a third connecting structure and a fourth connecting structure arranged axially along one of the second connecting pieces at both ends, the second connecting piece being detachably connected to the third connecting structure, and an intermediate element being detachably connected to the fourth connecting structure. As described in claim 6, the building formwork unit comprises a first joint structure at the inner end of the first joint piece being a first column having an external thread, and a second joint structure at the inner end of the second joint piece being a second column having an external thread; wherein the first connecting element is generally shaped like a truncated cone, the first connecting structure of the first connecting element being internally threaded at the bottom of the truncated cone, and the second connecting structure of the first connecting element being internally threaded at the top of the truncated cone; wherein the second connecting element is generally shaped like a truncated cone, the third connecting structure of the second connecting element being internally threaded at the bottom of the truncated cone, and the fourth connecting structure of the second connecting element being internally threaded at the top of the truncated cone; wherein the external thread of the first column of the first joint piece engages with the internal thread of the first connecting structure of the first connecting element, and the external thread of the second column of the second joint piece engages with the internal thread of the third connecting structure of the second connecting element. A building formwork unit, comprising: An aluminum template and a wooden template, wherein a first inner surface of the aluminum template and a second inner surface of the wooden template are disposed opposite to each other, and a first side edge of the aluminum template adjacent to the first inner surface includes at least one first positioning hole; a first connecting piece, one outer end of which includes a first connecting hole configured to be separably engaged with the first positioning hole of the aluminum template via a fastener; an intermediate element, which is elongated; an insert that passes through the wooden template and has an inner end and an outer end; a first connecting element, both ends of which include a first connecting structure and a second connecting structure arranged axially along one of the first connecting pieces, the first connecting piece engaging the first connecting structure, and one end of the intermediate element engaging the second connecting structure; a second connecting element, both ends of which include a third connecting structure and a fourth connecting structure arranged axially along one of the inserts, the inner end of the insert engaging the third connecting structure in a separable manner, and the other end of the intermediate element being configured to engage the fourth connecting structure. As described in claim 8, the building template unit includes a first column at the inner end of the first connecting piece having an external thread, and the inner end of the insert having an external thread; wherein the first connecting element is generally truncated cone, the first connecting structure of the first connecting element is located within the internal thread at the bottom of the truncated cone, and the second connecting structure of the first connecting element is located within the internal thread at the top of the truncated cone; wherein the second connecting element is generally truncated cone, the third connecting structure of the second connecting element is located within the internal thread at the bottom of the truncated cone, and the fourth connecting structure of the second connecting element is located within the internal thread at the top of the truncated cone; wherein the external thread of the first column of the first connecting piece engages with the internal thread of the first connecting structure of the first connecting element, and the external thread of the inner end of the insert engages with the internal thread of the third connecting structure of the second connecting element. The building formwork unit as described in claim 8, wherein the first connecting piece, the first connecting element, and the intermediate element are integrally formed.

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