CN117967036B - Template supporting device at joint of superimposed sheet and beam - Google Patents

Abstract

The present invention relates to the field of building forming technology, and in particular to a formwork support device for the junction of a composite plate and a beam, comprising two Z-shaped support plates symmetrically distributed front and back, and a height adjustment mechanism is provided on the support plate. When the existing method is used to support the junction of the composite plate and the beam, it is usually necessary to first determine the support point of the junction of the composite plate and the beam, and then insert the support material under the composite plate, and adjust the height of the support material to ensure that the junction of the composite plate and the beam obtains appropriate support and support angle. This method can effectively support the junction of the composite plate and the beam, but requires a large amount of support materials for repeated assembly and construction, which consumes a lot of time. The support plate used in the present invention can be directly clamped on the clamping mechanism, and the entire beam can be directly supported by two support plates, without the need for operators to use the existing support device to support the beam multiple times, thereby improving the support efficiency.

Description

A formwork support device for the joint of a composite plate and a beam

Technical Field

The invention relates to the technical field of building forming, and in particular to a template supporting device at the junction of a composite plate and a beam.

Background technique

In construction, the formwork support at the junction of the composite slab and the beam plays an important role, specifically: providing support and stability: before pouring concrete, the composite slab needs to be well supported to ensure its stability and firmness. The formwork support combined with the beam structure can provide stable support for the composite slab, ensuring that no displacement or deformation occurs during the pouring process, thereby ensuring the accuracy and integrity of the concrete structure; sharing the pressure of concrete pouring: when pouring concrete, the formwork support at the junction of the beam and the composite slab can disperse and bear the pressure and weight of the concrete pouring, avoiding damage or deformation due to excessive pressure; improving construction safety: through reasonable formwork support, the operating risks of workers in the process of pouring concrete can be reduced, ensuring the safety of construction personnel and equipment; ensuring the quality of concrete structure: good formwork support can ensure the accurate shape and size of the components after concrete pouring, thereby ensuring the quality and stability of the concrete structure. Considering the above functions, formwork support at the junction of the composite slab and the beam is an indispensable part of the construction process. This support helps to ensure the accuracy and integrity of the structural elements during the construction process, and also helps to ensure the safety of construction personnel.

When using existing methods to support the joint between the composite plate and the beam, it is usually necessary to first determine the support point at the joint between the composite plate and the beam, determine the length and quantity of the support material based on the position of the support point, and then insert the support material under the composite plate and properly fix it at the joint between the beam. A support frame or a support rod can be used to fix the support material to ensure that it is stable and reliable. Then, as needed, the height of the support material is adjusted to ensure that the joint between the composite plate and the beam obtains appropriate support and support angle. Finally, the support structure needs to be checked to ensure that the support material is stable and reliable and will not shift or slide due to external forces. This method can effectively support the joint between the composite plate and the beam, and has high operational flexibility and can be adapted to different occasions.

However, in the above method, a large amount of support materials are required for repeated assembly and construction, so that multiple support devices are formed, and the same beam needs to be supported multiple times using multiple support devices, which consumes a lot of time and increases labor input.

Summary of the invention

Based on this, it is necessary to provide a formwork support device at the junction of the composite plate and the beam, aiming to solve the problems caused by the existing technology when supporting the formwork at the junction of the composite plate and the beam.

In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme to achieve: a template support device for the junction of a composite plate and a beam, comprising: two Z-shaped support plates symmetrically distributed front and back, and a height adjustment mechanism is arranged on the support plates.

A supporting mechanism is evenly arranged from left to right and is located below the two supporting plates. The supporting mechanism includes an adjustable distance branch chain for adjusting the clamping distance. Rectangular blocks are installed at both front and rear ends of the adjustable distance branch chain. A rectangular through hole is opened in the middle of the rectangular block. Two supporting branches are symmetrically connected to the front and rear of the adjustable distance branch chain.

The clamping mechanism is arranged at the upper end of the rectangular block, and the clamping mechanism includes a positioning frame installed at the upper end of the rectangular block, a first clamping rod is rotatably connected inside the positioning frame, a second clamping rod is rotatably connected to the lower end of the first clamping rod, and a third clamping rod is rotatably connected to the lower end of the second clamping rod. The first clamping rod, the second clamping rod and the third clamping rod are all equipped with connecting blocks connected to the support plate, and the first clamping rod, the second clamping rod and the third clamping rod are commonly connected to a limited position support chain.

A plurality of positioning mechanisms are provided, and each positioning mechanism is located between two adjacent rectangular blocks on the left and right.

According to an embodiment of the present invention, the adjustable distance branch chain includes two connecting rods located below the two support plates and distributed front and back, the ends of the front and rear connecting rods away from each other are fixedly connected to the rectangular block, and an adjusting cylinder is installed at the other end of any one of the front and rear connecting rods, and a plurality of evenly distributed positioning holes are opened on the other corresponding connecting rod, and a positioning rod is inserted into any one of the positioning holes, and the positioning rod slides through the wall of the adjusting cylinder to cooperate.

According to an embodiment of the present invention, the supporting branch chain includes an auxiliary block installed in the middle of the connecting rod, a supporting block is installed on the upper end of the auxiliary block, a lifting rod is installed on the lower end of the auxiliary block, a positioning column is slidably connected to the lower end of the lifting rod, a placement opening is opened at the upper end of the positioning column, and a plurality of adjustment plates evenly distributed from top to bottom are placed inside the placement opening.

According to an embodiment of the present invention, the limiting branch chain includes three connecting screws respectively installed on the first clamping rod, the second clamping rod and the third clamping rod, and the left and right ends of the three connecting screws are jointly sleeved with limiting plates, and the limiting plates are clamped together with the first clamping rod, the second clamping rod and the third clamping rod, and the left and right ends of the connecting screws are threadedly connected with nuts.

According to an embodiment of the present invention, the positioning mechanism includes a cylindrical rod arranged between two adjacent rectangular blocks on the left and right, connecting frames are installed at both ends of the cylindrical rod, a sliding hole with an opening facing the rectangular block is arranged in the connecting frame, a square through hole is opened in the hole wall below the sliding hole, a moving rod is slidably connected in the sliding hole, a connecting spring is installed between the end of the moving rod away from the rectangular block and the hole wall of the sliding hole, a handle is integrally formed at the lower end of the moving rod for sliding cooperation with the square through hole, a V-shaped plate with an opening facing downward is commonly installed at the upper ends of the two connecting frames, and the moving rod is plug-engaged with the rectangular through hole.

According to an embodiment of the present invention, the height adjustment mechanism includes two L-shaped plates that are symmetrically distributed on the left and right and are slidably connected to the upper side plates of the support plate. A lifting plate is commonly installed on the upper ends of the two L-shaped plates, and a plurality of filling plates evenly distributed from top to bottom are placed between the lower end of the lifting plate and the upper end of the upper side plates of the support plate.

According to an embodiment of the present invention, a limiting block is installed in the positioning frame, and the limiting block is located between the positioning frame and the first clamping rod.

According to an embodiment of the present invention, a plurality of clamping frames evenly distributed from left to right are installed at the lower end of the upper side plate of the support plate, and the clamping frames are plugged and matched with the connecting block located at the end of the first clamping rod.

In summary, the present invention includes at least one of the following beneficial technical effects: 1. The adopted supporting mechanism can be adjusted accordingly according to the width of the beam, and the adopted height adjustment mechanism can be adjusted accordingly according to the thickness of the beam, thereby improving the flexibility of the device and increasing the use occasions of the device.

2. The adopted support plate can be directly connected to the clamping mechanism, and the entire beam can be directly supported by two support plates, without the need for operators to use existing support devices to support the beam multiple times, thereby improving the support efficiency.

3. The clamping mechanism used can support the support plate from multiple points and multiple angles, and the supports at multiple angles can be fixed, thereby increasing the stability of the support plate supporting the beam, and the clamping mechanism does not need to be adjusted again after the adjustment is completed, which is convenient for quick use next time and reduces labor input.

4. Each support plate is supported by multiple support mechanisms, and positioning mechanisms are provided between the multiple support mechanisms to prevent the support mechanisms from tilting after being subjected to external forces, thereby further increasing the stability of the support mechanisms.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

Fig. 1 is a schematic diagram of a three-dimensional structure from a first perspective of a formwork support device at the junction of a composite plate and a beam provided in accordance with an embodiment of the present invention.

FIG2 is a schematic diagram of a stereoscopic structure from a second perspective of a formwork support device at the junction of a composite plate and a beam provided in accordance with an embodiment of the present invention.

FIG3 shows a front view of a template support device at the junction of a composite plate and a beam provided according to an embodiment of the present invention.

FIG. 4 shows a left view of a template support device at the junction of a composite plate and a beam according to an embodiment of the present invention.

FIG5 shows a cross-sectional view taken along line A-A in FIG3.

FIG6 is a schematic structural diagram showing a positioning mechanism of a template support device at a junction of a composite plate and a beam according to an embodiment of the present invention.

The above drawings include the following reference numerals: 1, support plate; 11, clamping frame; 2, height adjustment mechanism; 21, L-shaped plate; 22, lifting plate; 23, filling plate; 3, support mechanism; 31, distance adjustment branch chain; 311, connecting rod; 312, adjusting cylinder; 313, positioning hole; 314, positioning rod; 32, rectangular block; 33, rectangular through hole; 34, support branch chain; 341, auxiliary block; 342, support block; 343, lifting rod; 34 4. Positioning column; 345. Placement opening; 346. Adjustment plate; 4. Clamping mechanism; 41. Positioning frame; 411. Limit block; 42. First clamping rod; 43. Second clamping rod; 44. Third clamping rod; 45. Limit branch chain; 451. Connecting screw; 452. Limit plate; 46. Connecting block; 5. Positioning mechanism; 51. Cylindrical rod; 52. Connecting frame; 53. Sliding hole; 54. Moving rod; 55. Connecting spring; 56. V-shaped plate.

Detailed ways

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

1 to 4 , a template support device for the junction of a composite plate and a beam comprises two Z-shaped support plates 1 symmetrically distributed front to back, and a height adjustment mechanism 2 is provided on the support plates 1 .

Referring to Figures 1 and 5, the height adjustment mechanism 2 includes two L-shaped plates 21 that are symmetrically distributed on the left and right and are slidably connected to the upper side plate of the support plate 1. A lifting plate 22 is commonly installed on the upper ends of the two L-shaped plates 21, and a plurality of filling plates 23 evenly distributed from top to bottom are placed between the lower end of the lifting plate 22 and the upper end of the upper side plate of the support plate 1.

During specific operation, the lifting plate 22 is initially fitted with the upper side plate of the support plate 1. According to the thickness of the beam, the lifting plate 22 is manually lifted, and the lifting plate 22 slides on the upper side plate of the support plate 1 through two L-shaped plates 21. Then a corresponding number of filling plates 23 are placed between the lifting plate 22 and the upper side plate of the support plate 1. The filling plates 23 support the lifted lifting plate 22 to prevent the lifting plate 22 from sliding down after the lifting plate 22 is released. The height-adjustable lifting plate 22 cooperates with the support plate 1 to support beams of different thicknesses within a certain range and ensure that the upper end of the lifting plate 22 is at the same height as the upper end of the beam, thereby improving the flexibility of the device.

Referring to Figures 1, 2 and 5, the formwork support device at the junction of the composite plate and the beam also includes a support mechanism 3, and multiple support mechanisms 3 are evenly arranged from left to right and are located below the two support plates 1. The support mechanism 3 includes an adjustable branch chain 31 for adjusting the clamping distance. Rectangular blocks 32 are installed at the front and rear ends of the adjustable branch chain 31, and a rectangular through hole 33 is opened in the middle of the rectangular block 32. Two support branches 34 are symmetrically connected to the front and rear of the adjustable branch chain 31.

Referring to Figures 2 and 5, the adjustable distance branch chain 31 includes two connecting rods 311 located below the two support plates 1 and distributed front and back, and the ends of the front and rear connecting rods 311 that are away from each other are fixedly connected to the rectangular block 32, and the other end of any one of the front and rear connecting rods 311 is installed with an adjusting cylinder 312, and the other corresponding connecting rod 311 is provided with a plurality of evenly distributed positioning holes 313, and a positioning rod 314 is inserted into any one of the positioning holes 313, and the positioning rod 314 slides through the wall of the adjusting cylinder 312 to cooperate.

During specific operation, according to the width of the beam, multiple connecting rods 311 at the front and rear positions are manually pulled to adjust the spacing between the connecting rods 311 at the front and rear positions. At the same time, the corresponding connecting rods 311 slide in the corresponding adjusting cylinders 312. When the connecting rods 311 at the front and rear positions move to a position matching the width of the beam, the positioning rods 314 are passed through the adjusting cylinders 312 and inserted into the corresponding positioning holes 313, thereby limiting the connecting rods 311 at the front and rear positions after the movement. When the connecting rods 311 move, they drive the rectangular blocks 32 and the supporting branches 34 to move.

Referring to Figures 1, 2 and 5, the formwork support device at the junction of the composite plate and the beam also includes a clamping mechanism 4, which is arranged at the upper end of the rectangular block 32. The clamping mechanism 4 includes a positioning frame 41 installed at the upper end of the rectangular block 32, and a first clamping rod 42 is rotatably connected inside the positioning frame 41. The lower end of the first clamping rod 42 is rotatably connected to the second clamping rod 43, and the lower end of the second clamping rod 43 is rotatably connected to the third clamping rod 44. The first clamping rod 42, the second clamping rod 43 and the third clamping rod 44 are all equipped with a connecting block 46 connected to the support plate 1, and the first clamping rod 42, the second clamping rod 43 and the third clamping rod 44 are commonly connected to a limited position support chain 45.

During operation, the connecting rod 311 moves and drives the rectangular block 32 to move, and the rectangular block 32 drives the positioning frame 41 to move, and then the first clamping rod 42, the second clamping rod 43 and the third clamping rod 44 are rotated in sequence, and the first clamping rod 42 is ensured to be in a vertical state.

Referring to Figures 2 and 5, the limiting branch chain 45 includes three connecting screws 451 that are respectively installed on the first clamping rod 42, the second clamping rod 43 and the third clamping rod 44, and the left and right ends of the three connecting screws 451 are jointly sleeved with limiting plates 452. The limiting plates 452 are snap-fitted with the first clamping rod 42, the second clamping rod 43 and the third clamping rod 44, and the left and right ends of the connecting screws 451 are threadedly connected with nuts.

1 and 5 , a limiting block 411 is installed in the positioning frame 41 , and the limiting block 411 is located between the positioning frame 41 and the first clamping rod 42 .

During specific operation, after rotating the first clamping rod 42, the second clamping rod 43 and the third clamping rod 44, the two limit plates 452 are sleeved on the three connecting screws 451 left and right, and at the same time, the limit plates 452 are clamped on the first clamping rod 42, the second clamping rod 43 and the third clamping rod 44, and then the nut is threadedly connected to the connecting screw 451, so as to limit the limit plates 452. The two limit plates 452 clamp and limit the rotated first clamping rod 42, the second clamping rod 43 and the third clamping rod 44, so that the rotated first clamping rod 42, the second clamping rod 43 and the third clamping rod 44 remain stable.

Referring to FIG. 2 , a plurality of clamping frames 11 evenly distributed from left to right are installed at the lower end of the upper side plate of the support plate 1 , and the clamping frames 11 are plugged and matched with the connecting block 46 located at the end of the first clamping rod 42 .

During specific work, the support plate 1 is placed on the connecting block 46 at the upper end of multiple first clamping rods 42 on the same side. The connecting block 46 at the upper end of the first clamping rod 42 is plugged into the card frame 11 to realize the function of connecting the support plate 1. At the same time, the connecting block 46 on the third clamping rod 44 supports the lower side plate of the support plate 1. Repeat the previous steps and place another support plate 1 on the multiple first clamping rods 42 on the other side. The limit block 411 in the positioning frame 41 limits the vertical first clamping rod 42 to prevent the vertical first clamping rod 42 from rotating.

Referring to FIG. 2 , the template support device at the junction of the composite plate and the beam further includes a positioning mechanism 5 , wherein a plurality of positioning mechanisms 5 are provided and each positioning mechanism 5 is located between two adjacent rectangular blocks 32 on the left and right.

Referring to Figures 2 and 6, the positioning mechanism 5 includes a cylindrical rod 51 arranged between two adjacent rectangular blocks 32 on the left and right, and connecting frames 52 are installed at both ends of the cylindrical rod 51. A sliding hole 53 with an opening facing the rectangular block 32 is arranged in the connecting frame 52, and a square through hole is opened in the hole wall below the sliding hole 53. A moving rod 54 is slidably connected in the sliding hole 53, and a connecting spring 55 is installed between the end of the moving rod 54 away from the rectangular block 32 and the hole wall of the sliding hole 53. A handle that slides with the square through hole is integrally formed at the lower end of the moving rod 54, and a V-shaped plate 56 with an opening facing downward is commonly installed at the upper ends of the two connecting frames 52. The moving rod 54 is plug-fitted with the rectangular through hole 33.

During specific operation, after the two support plates 1 are placed, the handles at the lower ends of the two moving rods 54 are manually pulled, and the handles drive the moving rods 54 to move into the sliding holes 53 and squeeze the connecting springs 55. Then, the cylindrical rod 51 is moved between two adjacent rectangular blocks 32, and the handles are released. The squeezed connecting springs 55 drive the moving rod 54 to reset and be inserted into the rectangular through holes 33, thereby realizing the function of connecting the two rectangular blocks 32 and increasing the stability of the support branches 34 on the left and right sides. A triangle is formed between the V-shaped plate 56, the cylindrical rod 51 and the two connecting frames 52, thereby further increasing the stability of the support branches 34. Repeat the previous steps until a cylindrical rod 51 and two connecting frames 52 are inserted between every two adjacent rectangular blocks 32.

2 and 5 , the support branch chain 34 includes an auxiliary block 341 installed in the middle of the connecting rod 311, a support block 342 is installed on the upper end of the auxiliary block 341, a lifting rod 343 is installed on the lower end of the auxiliary block 341, a positioning column 344 is slidably connected to the lower end of the lifting rod 343, a placement opening 345 is opened at the upper end of the positioning column 344, and a plurality of adjustment plates 346 evenly distributed from top to bottom are placed inside the placement opening 345.

During specific operation, initially, the adjustment plate 346 is not placed in the placement opening 345, and the lifting rod 343 is in contact with the lower end of the positioning column 344. At this time, the height of the lifting rod 343 is the lowest, and the support block 342 is used to support the rotated third clamping rod 44. Subsequently, multiple connecting rods 311 are pushed at the same time by manual or existing jacking devices. The multiple connecting rods 311 drive the first clamping rods 42, the second clamping rods 43 and the third clamping rods 44 in the multiple positioning frames 41 to move through the multiple rectangular blocks 32. The second clamping rod 43 and the third clamping rod 44 drive the two support plates 1 to move upward to the beam and fit tightly against the side wall of the beam. At the same time, the two lifting plates 22 above the two support plates 1 are flush with the upper end of the beam. Then, a corresponding number of adjustment plates 346 are placed in the placement opening 345 so that the uppermost adjustment plate 346 fits against the lower end of the lifting rod 343, thereby limiting the lifted lifting rod 343 and realizing the function of supporting the support plate 1. Then, the template is placed at the junction of the composite plate and the beam, and the two support plates 1 support the junction.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A template support device for the junction of a composite plate and a beam, characterized in that it comprises two Z-shaped support plates (1) symmetrically distributed front and back, and a height adjustment mechanism (2) is provided on the support plates (1); A plurality of support mechanisms (3) are evenly arranged from left to right and are located below the two support plates (1), the support mechanism (3) comprising a distance-adjusting branch chain (31) for adjusting the clamping distance, rectangular blocks (32) are installed at both the front and rear ends of the distance-adjusting branch chain (31), a rectangular through hole (33) is opened in the middle of the rectangular block (32), and two support branches (34) are symmetrically connected to the distance-adjusting branch chain (31) in a front-rear manner; A clamping mechanism (4) is arranged at the upper end of the rectangular block (32), and the clamping mechanism (4) comprises a positioning frame (41) installed at the upper end of the rectangular block (32); a first clamping rod (42) is rotatably connected inside the positioning frame (41); a second clamping rod (43) is rotatably connected to the lower end of the first clamping rod (42); a third clamping rod (44) is rotatably connected to the lower end of the second clamping rod (43); a connecting block (46) connected to the support plate (1) is installed on the first clamping rod (42), the second clamping rod (43) and the third clamping rod (44); and a limited position support chain (45) is commonly connected to the first clamping rod (42), the second clamping rod (43) and the third clamping rod (44); A plurality of positioning mechanisms (5) are provided, and each positioning mechanism (5) is located between two adjacent rectangular blocks (32) on the left and right; The limit branch chain (45) comprises three connecting screws (451) respectively installed on the first clamping rod (42), the second clamping rod (43) and the third clamping rod (44); the left and right ends of the three connecting screws (451) are both sleeved with limit plates (452); the limit plates (452) are snap-fitted with the first clamping rod (42), the second clamping rod (43) and the third clamping rod (44); the left and right ends of the connecting screws (451) are threadedly connected with nuts; A plurality of evenly distributed clamping frames (11) are installed at the lower end of the upper side plate of the support plate (1), and the clamping frames (11) are plugged into and matched with a connecting block (46) located at the end of the first clamping rod (42), and the connecting block (46) on the third clamping rod (44) supports the lower side plate of the support plate (1). 2. A formwork support device for the junction of a composite plate and a beam according to claim 1, characterized in that: the adjustable distance branch chain (31) includes two connecting rods (311) located below the two supporting plates (1) and distributed front and back, and the ends of the front and rear connecting rods (311) that are away from each other are fixedly connected to the rectangular block (32), and the other end of any one of the front and rear connecting rods (311) is equipped with an adjusting cylinder (312), and the other corresponding connecting rod (311) is provided with a plurality of evenly distributed positioning holes (313), and a positioning rod (314) is inserted into any one of the positioning holes (313), and the positioning rod (314) slides through the wall of the adjusting cylinder (312) to cooperate. 3. A formwork support device for the junction of a composite plate and a beam according to claim 2, characterized in that: the support branch chain (34) includes an auxiliary block (341) installed in the middle of the connecting rod (311), a support block (342) is installed at the upper end of the auxiliary block (341), a lifting rod (343) is installed at the lower end of the auxiliary block (341), a positioning column (344) is slidably connected to the lower end of the lifting rod (343), a placement opening (345) is opened at the upper end of the positioning column (344), and a plurality of adjustment plates (346) evenly distributed from top to bottom are placed inside the placement opening (345). 4. A formwork support device for the junction of a composite plate and a beam according to claim 1, characterized in that: the positioning mechanism (5) includes a cylindrical rod (51) arranged between two adjacent rectangular blocks (32) on the left and right, and connecting frames (52) are installed at both ends of the cylindrical rod (51), and a sliding hole (53) opening toward the rectangular block (32) is arranged in the connecting frame (52), and a square through hole is opened in the lower hole wall of the sliding hole (53), and a moving rod (54) is slidably connected in the sliding hole (53), and a connecting spring (55) is installed between the end of the moving rod (54) away from the rectangular block (32) and the hole wall of the sliding hole (53), and a handle that slides with the square through hole is integrally formed at the lower end of the moving rod (54), and a V-shaped plate (56) with an opening facing downward is installed on the upper ends of the two connecting frames (52), and the moving rod (54) is plug-fitted with the rectangular through hole (33). 5. A formwork support device for the junction of a composite plate and a beam according to claim 1, characterized in that: the height adjustment mechanism (2) includes two L-shaped plates (21) which are symmetrically distributed on the left and right and are slidably connected to the upper side plate of the support plate (1), and a lifting plate (22) is installed on the upper ends of the two L-shaped plates (21), and a plurality of filling plates (23) evenly distributed from top to bottom are placed between the lower end of the lifting plate (22) and the upper end of the upper side plate of the support plate (1). 6. A formwork support device for the junction of a composite plate and a beam according to claim 1, characterized in that a limit block (411) is installed in the positioning frame (41), and the limit block (411) is located between the positioning frame (41) and the first clamping rod (42).