A modular formwork assembly structure for stair construction joints and its application method

Abstract

This invention discloses a tool-type stair construction joint template assembly structure, including movable rods, a clamping mechanism, and fixing devices. The clamping mechanism includes a locking plate and a fixing plate, with corresponding connecting holes at both ends of the locking plate and the fixing plate, which are connected by bolts. Several movable rods are arranged in a row between the locking plate and the fixing plate. The clamping or releasing of the movable rods is achieved by controlling the distance between the locking plate and the fixing plate. The lower part of the fixing device has a reserved hole for connecting the stair side template, and the upper part is connected to the clamping mechanism. Two fixing devices are respectively connected to both ends of the clamping mechanism. This invention has advantages such as compact structure, strong applicability, and high recyclability.

Description

Technical Field

[0001] This invention relates to the field of staircase construction technology, and in particular to a tool-type staircase construction joint template assembly structure and its usage method. Background Technology

[0002] When pouring concrete for cast-in-place reinforced concrete staircases in building construction, a construction joint is typically reserved at one-third of the stair slab. Traditionally, wooden formwork is used to seal the concrete at this joint. Because the stair slab contains bottom slab reinforcement bars, the wooden formwork needs to be pre-cut with grooves at the bottom according to the spacing and size of these bars. In actual construction, errors in the binding position of the bottom slab reinforcement bars cause the grooves in the formwork to misalign with the bars, necessitating measures such as enlarging the groove size. This results in incomplete sealing of the formwork and grout leakage, affecting the quality of the construction joint. The traditional method of using fixed-size wooden formwork with fixed groove positions means it can only be used for staircases of the same size and with the same reinforcement spacing, and cannot be reused for staircases of different sizes and reinforcement spacings. Furthermore, the grooves weaken the rigidity of the wooden formwork, making the grooves easily damaged during demolding. Typically, it can only be reused 2-3 times, resulting in limited reuse.

[0003] The above background information is provided only to aid in understanding the concept and technical solution of this invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0004] The purpose of this invention is to propose a reusable tool-type stair construction joint formwork device that is applicable to different sizes and rebar spacings, solves the technical problem of alignment between the construction joint formwork and the bottom slab rebar, and increases the number of times the construction joint formwork can be reused.

[0005] Therefore, this invention proposes a tool-type staircase construction joint template combination structure and its usage method.

[0006] Preferably, the present invention may also have the following technical features:

[0007] A tool-type stair construction joint template assembly structure includes movable rods, a clamping mechanism, and fixing devices. The clamping mechanism includes a locking plate and a fixing plate, with corresponding connection holes at both ends of the locking plate and the fixing plate, which are connected by bolts. Several movable rods are arranged in a row between the locking plate and the fixing plate. The clamping or releasing of the movable rods is achieved by controlling the distance between the locking plate and the fixing plate. The lower part of the fixing device has a reserved hole for connecting the stair side template, and the upper part is connected to the clamping mechanism. Two fixing devices are respectively connected to both ends of the clamping mechanism.

[0008] Furthermore, the movable rod is composed of a long vertical rod and a short horizontal rod forming a T-shaped structure.

[0009] Furthermore, the diameter of the movable rod is larger than the diameter of the stair reinforcement bars laid flat above the bottom formwork of the staircase.

[0010] Furthermore, the diameter of the movable rod is one size larger than the diameter of the stair reinforcement.

[0011] Furthermore, it also includes support plates, with a support plate fixed to the lower side of each of the two ends of the fixing plate.

[0012] Furthermore, it also includes connectors and limiting covers. A connector is fixed to the upper side of each of the two ends of the fixing plate. The limiting cover is installed above the clamping mechanism, and its two ends are respectively connected and fixed to the connectors by bolts.

[0013] Furthermore, the rear vertical surface of the limiting cover is flush with the rear plate surface of the fixing plate, or the rear vertical surface of the limiting cover is located behind the rear plate surface of the fixing plate.

[0014] The front vertical surface of the limiting cover is located in front of the front surface of the locking plate.

[0015] Furthermore, the fixing device includes a rectangular frame and a connecting plate. The connecting plate is a right-angled plate, with its upper part fixed to the rectangular frame as a whole and its lower part provided with the reserved hole. The rectangular frame has a rectangular hole formed by hollowing out the middle part. The width of the rectangular hole matches the width of the limiting cover, so that the rectangular frame can slide with the limiting cover as a guide.

[0016] Furthermore, it also includes a locking bolt, which is threadedly connected to the lower part of the rectangular frame. By adjusting the locking bolt, the front end of the locking bolt is pressed against the locking plate to limit the position of the fixing device.

[0017] A method for using the above-described modular staircase construction joint formwork assembly structure includes the following steps:

[0018] A. Determine the number of movable bars based on the dimensions of the staircase, and assemble the template combination structure;

[0019] B. Based on the location of the construction joint, the fixing device is placed on the side formwork on both sides of the staircase. The movable rod is lifted up where there is staircase reinforcement, and the end of the movable rod rests on the staircase reinforcement; where there is no staircase reinforcement, the end of the movable rod rests on the bottom formwork of the staircase.

[0020] C. After confirming that the position of the stair reinforcement and movable rod is correct, tighten the bolts connecting the fixing plate and the locking plate to press the movable rod firmly. Then, use steel nails to secure the fixing device and the formwork on both sides of the staircase.

[0021] The beneficial effects of this invention compared to existing technologies include: the number of movable rods can be flexibly adjusted to suit stairs of different widths; the construction joint formwork assembly structure is made entirely of steel, making it resistant to wear and damage, and allowing for repeated use and increased turnover. Because a groove is formed between adjacent movable rods, the concrete surface poured from the row of movable rods has a wavy structure, which is beneficial for subsequent roughening processes, reducing the workload and improving efficiency. Attached Figure Description

[0022] Figure 1 This is a perspective view of the present invention.

[0023] Figure 2 This is an exploded view of the present invention.

[0024] Figure 3 This is a structural diagram of the movable rod of the present invention.

[0025] Figure 4 This is an application diagram of the present invention.

[0026] Explanation of reference numerals in the attached figures

[0027] 1. Movable rod; 2. Movable rods arranged in a row; 3. Fixing plate; 4. Locking plate; 41. Bolt; 5. Limiting cover; 6. Fixing device; 61. Connecting plate; 62. Rectangular frame; 63. Locking bolt; 7. Bolt; 8. Staircase side formwork; 9. Staircase reinforcement; 10. Staircase bottom formwork; 11. Fixing plate. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope or application of the present invention.

[0029] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0030] like Figures 1-3The illustrated tool-type stair construction joint template assembly structure includes movable rods 1, a clamping mechanism, and fixing devices 6. The clamping mechanism includes a locking plate 4 and a fixing plate 11. Both ends of the locking plate 4 and the fixing plate 11 have corresponding connecting holes and are connected by bolts 41. Several movable rods 1 are arranged in a row between the locking plate 4 and the fixing plate 11, and are connected by bolts 41. The clamping or releasing of the movable rods 1 is achieved by controlling the distance between the locking plate 4 and the fixing plate 11. The fixing device 6 has a pre-drilled hole at its lower part for connecting to the stair side template 8, and its upper part is connected to the clamping mechanism. Two fixing devices 6 are respectively connected to both ends of the clamping mechanism and are also used to limit the ends of the row of movable rods 1, preventing tilting or lateral displacement. Several movable rods 1 operate independently. The number of movable rods 1 is determined based on the size of the staircase to accommodate staircases of different widths. All movable rods 1 are installed in a row into the receiving groove formed between the locking plate 4 and the fixing plate 11. The movable rods 1 automatically spring up at positions with staircase reinforcing bars 9, with the ends of the spring-loaded rods landing on the reinforcing bars 9. The ends of the movable rods 1 not interfered with by the reinforcing bars 9 land on the bottom formwork 10 of the staircase. The distance between the locking plate 4 and the fixing plate 11 is then adjusted using bolts 41 to clamp the movable rods 1, forming a formwork to intercept the concrete at the construction joint. Steel nails are then driven into the pre-drilled holes of the fixing device 6 to fix the fixing device 6 and the staircase side formwork 8, thus fixing the entire construction joint formwork assembly structure. Preferably, as... Figure 3 The movable rod 1 is a T-shaped structure composed of a long vertical rod and a short horizontal rod. The long vertical rod points downwards to intercept concrete, while the short horizontal rod points upwards to prevent the movable rod 1 from dislodging from the receiving groove formed between the locking plate 4 and the fixing plate 11. More specifically, the diameter of the movable rod 1 is one size larger than the diameter of the stair reinforcing steel 9 laid flat above the bottom formwork 10 of the stairs. For example, if the diameter of the stair reinforcing steel 9 is No. 10 steel, then the diameter of the movable rod 1 is the size of No. 12 steel; or, if the diameter of the stair reinforcing steel 9 is No. 12 steel, then the diameter of the movable rod 1 is the size of No. 14 steel.

[0031] It also includes support plates 12, with a support plate 12 welded to the lower side of each end of the fixing plate 11 to support the locking plate 4. When assembling the construction joint template assembly structure, the locking plate 4 is placed on the support plates. At this time, the fixing plate 11 and the locking plate 4 can be connected by bolts 41, which improves the connection efficiency of the fixing plate 11 and the locking plate 4 and reduces the amount of labor.

[0032] It also includes a connector 3 and a limiting cover 5. A connector 3 is welded to the upper side of each end of the fixing plate 11. The limiting cover 5 is installed above the clamping mechanism, and its two ends are connected and fixed to the connector 3 by bolts 7. The limiting cover 5 is used to prevent the movable rod 1 from coming off from above. Preferably, the width of the limiting cover 5 is greater than the diameter of the movable rod 1. The connector 3 is a U-shaped structure, which reduces the processing difficulty and also reduces the weight. The rear vertical surface of the limiting cover 5 is flush with the rear plate surface of the fixing plate 11 or the rear vertical surface of the limiting cover 5 is located behind the rear plate surface of the fixing plate 11; the front vertical surface of the limiting cover 5 is located in front of the front plate surface of the locking plate 4.

[0033] The fixing device 6 includes a rectangular frame 62 and a connecting plate 61. The connecting plate 61 is a right-angled plate with an L-shaped structure. Its upper part is welded and fixed to the rectangular frame 62, and its lower part has the reserved hole. The rectangular frame 62 has a rectangular hole in the middle, and the width of the rectangular hole matches the width of the limiting cover 5, so that the rectangular frame 62 can slide with the limiting cover 5 as a guide. The upper side of the rectangular hole abuts against the upper side of the limiting cover 5, and the lower side has a certain distance from the front plate surface of the locking plate 4. In this way, after assembling the locking plate 4, the fixing plate 11, and the limiting cover 5, the rectangular frame 62 can move in the parts formed by the assembly of the locking plate 4, the fixing plate 11, and the limiting cover 5. The connecting plate 61 is perpendicular to the locking plate 4, the fixing plate 11, and the limiting cover 5, and thus the fixing device can be used to restrict the tilting or lateral displacement of the movable rod 1. Preferably, the connecting plates 61 of the two fixing devices 6 are symmetrically designed, so that the vertical plate surface of the connecting plate 61 limits the left and right sides of the row of movable rods 2, and the fixing plate 11 and the locking plate 4 limit the front and rear sides of the row of movable rods 2.

[0034] Further optimization of the design also includes a locking bolt 63, which is threadedly connected to the lower part of the rectangular frame 62. By adjusting the locking bolt 63, the front end of the locking bolt 63 is pressed against the front plate surface of the locking plate 4 to limit the position of the fixing device 6.

[0035] Reference Figure 4 A method for using a modular staircase construction joint formwork assembly structure includes the following steps:

[0036] A. Determine the number of movable rods 1 based on the dimensions of the staircase, and assemble the template combination structure;

[0037] In this step, by adjusting the number of movable rods 1 and the length of the row of movable rods 2, it is possible to adapt to staircases of different widths. Compared to using traditional whole-piece wooden formwork, this method is more adaptable and can be reused more times. If traditional wooden formwork is used to adapt to staircases of different widths, it is necessary to cut or lengthen the wooden formwork, which will undoubtedly damage the original structure of the wooden formwork and shorten its service life.

[0038] B. According to the location of the construction joint, the fixing device 6 is placed on the side formwork 8 of the stairs. The movable rod 1 is lifted up when there is a stair reinforcement 9, and the end of the movable rod 1 rests on the stair reinforcement 9; when there is no stair reinforcement 9, the end of the movable rod 1 rests on the bottom formwork 10 of the stairs.

[0039] In this step, the movable rods 1 are independent of each other and can move freely up and down. That is, if the lower end of the movable rod 1 is arranged with stair reinforcement 9, the lower end of the movable rod 1 can abut against the stair reinforcement 9. The movable rods 1 on the left and right sides of the stair reinforcement 9 and the upper side form grooves around the stair reinforcement 9, so that they can automatically adapt to the layout of the stair reinforcement 9. At the same time, there is no need to damage the structure of the movable rod 1 or the other parts of the construction joint formwork assembly structure, thus ensuring the construction joint formwork assembly structure.

[0040] C. After confirming that the positions of the stair reinforcement 9 and the movable rod 1 are correct, tighten the bolts 41 connecting the fixing plate 11 and the locking plate 4 to lock the movable rod 1, and then use steel nails to firmly nail the fixing device 6 and the stair side formwork 8.

[0041] In this step, the upper surface of the stair side template 8 is parallel to the stair bottom template 10. In this way, after fixing the fixing device 6 and the stair side template 8, it can be ensured that the movable rod 1 is perpendicular to the stair bottom template 10.

[0042] Because a groove is formed between adjacent movable rods 1, when pouring concrete, the concrete surface poured from the movable rods 2 arranged in a row has a wavy structure, which is beneficial to the subsequent roughening process, reduces the workload of the roughening process, and improves the efficiency of the roughening process.

[0043] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0044] Although exemplary embodiments of the invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the invention without departing from the central concepts of the invention described herein. Therefore, the invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the invention.

Claims

1. A modular formwork assembly structure for stair construction joints, characterized in that: The device includes movable rods, a clamping mechanism, and fixing devices. The clamping mechanism includes a locking plate and a fixing plate, with corresponding connecting holes at both ends of the locking plate and the fixing plate connected by bolts. Several movable rods are arranged in a row between the locking plate and the fixing plate. The clamping or releasing of the movable rods is achieved by controlling the distance between the locking plate and the fixing plate. The fixing device has a reserved hole at the bottom for connecting to the stair side template and is connected to the clamping mechanism at the top. Two fixing devices are respectively connected to both ends of the clamping mechanism. The movable rod consists of a T-shaped structure composed of a long vertical rod and a short horizontal rod; The diameter of the movable rod is larger than the diameter of the stair reinforcement bars laid flat above the bottom formwork of the staircase; It also includes connectors and limiting caps. A connector is fixed to the upper side of each end of the fixing plate. The limiting cap is installed above the clamping mechanism, and its two ends are respectively connected and fixed to the connectors by bolts. The rear vertical surface of the limiting cover is flush with the rear surface of the fixing plate or the rear vertical surface of the limiting cover is located behind the rear surface of the fixing plate; the front vertical surface of the limiting cover is located in front of the front surface of the locking plate. The fixing device includes a rectangular frame and a connecting plate. The connecting plate is a right-angled plate, with its upper part fixed to the rectangular frame as a whole and its lower part provided with the reserved hole. The rectangular frame has a rectangular hole formed by hollowing out the middle part. The width of the rectangular hole matches the width of the limiting cover, so that the rectangular frame can slide with the limiting cover as a guide. It also includes a locking bolt, which is threaded to the lower part of the rectangular frame. By adjusting the locking bolt, the front end of the locking bolt is pressed against the locking plate to limit the position of the fixing device.

2. The tool-type stair construction joint formwork assembly structure as described in claim 1, characterized in that: The diameter of the movable rod is one size larger than the diameter of the stair reinforcement bars.

3. The tool-type stair construction joint formwork assembly structure as described in claim 1, characterized in that: It also includes support plates, with a support plate fixed to the lower side of each of the two ends of the fixing plate.

4. A method of using the tool-type staircase construction joint formwork assembly structure as described in claim 1, characterized in that: Includes the following steps: A. Determine the number of movable bars based on the dimensions of the staircase, and assemble the template combination structure; B. Based on the location of the construction joint, the fixing device is placed on the side formwork on both sides of the staircase. The movable rod is lifted up where there is staircase reinforcement, and the end of the movable rod rests on the staircase reinforcement; where there is no staircase reinforcement, the end of the movable rod rests on the bottom formwork of the staircase. C. After confirming that the position of the stair reinforcement and movable rod is correct, tighten the bolts connecting the fixing plate and the locking plate to press the movable rod firmly. Then, use steel nails to secure the fixing device and the formwork on both sides of the staircase.

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