Height-adjustable cantilever structure assembling and supporting device and assembling method

Abstract

The invention provides a height-adjustable cantilever structure assembly supporting device and an assembly method, and belongs to the technical field of cantilever concrete structure construction. Comprising a plurality of upper chord members and a plurality of lower chord members, a plurality of combined telescopic rods are installed between each group of upper chord members and lower chord members, and the adjacent upper chord members and the adjacent lower chord members are fixedly connected through splicing sleeves; the combined telescopic rod comprises a fixed sliding rod, a sliding rod sleeve, a threaded sleeve and a threaded connecting rod, and a plurality of limiting grooves are formed in the sliding rod sleeve. Traditional cantilever H-shaped steel is replaced, the supporting device has higher bearing capacity and deformation resistance, the supporting span can be adjusted, the conditions of different construction sites can be coped with, the height of the supporting truss can be adjusted, the supporting device adapts to a large-weight cantilever structure, the universality is wide, meanwhile, the supporting device can be disassembled according to component parts, the purpose of convenient transportation is achieved, and the supporting device is suitable for popularization and application. Therefore, the construction efficiency and safety are improved, and good economical efficiency and practicability are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of cantilever concrete structure construction, and in particular to a cantilever structure assembly support device with adjustable height and an assembly method. Background Art

[0002] In actual construction, the common cantilever concrete structure support system is divided into ground-type support and cantilever support according to different force transmission methods. The structural advantage of the ground-type support platform is that the force transmission characteristics are clear and the design is simple. However, for higher cantilever layers, the ground-type scaffolding formwork support system uses a large amount of steel pipes, the frame itself has low rigidity, poor frame stability, and cumbersome installation and disassembly, resulting in high cost, long working hours, small cantilever span, and construction safety cannot be effectively guaranteed; in the cantilever support system, the concrete cantilever structure load is transmitted to the cantilever beam through the support frame, and then transmitted to the main structure by the fixing bolts, which is very different from the ground-type support platform structure. The ground-type support platform only needs to consider the bearing capacity of the bearing layer at the bottom of the vertical pole. The bottom of the vertical pole of the pure cantilever support platform is supported on the cantilever beam, and its load will cause the cantilever beam to bend and deform. At the same time, because there is no constraint at the end of the pure cantilever support platform, the strength and rigidity requirements of the cantilever beam are high, and the load bearing capacity of the support platform is small.

[0003] Although the existing cantilever support system has solved the support problem of some cantilever concrete structure construction, the H-shaped steel of pure cantilever support has low rigidity and weak bearing capacity, and its usage scenarios are limited. When the height of the cantilever structure increases and the cantilever span (cantilever load) is large, the span and the height of the support truss cannot be adjusted, making it difficult to adapt to cantilever structure construction in various spans and under various conditions. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a height-adjustable cantilever structure assembly support device and an assembly method to solve the problem that although the existing cantilever support system has solved the support problem of certain cantilever concrete structure construction, the H-shaped steel of the pure cantilever support has low rigidity and limited usage scenarios. When the height of the cantilever structure increases and the cantilever span (cantilever load) is large, the span and the height of the support truss cannot be adjusted, and it is difficult to adapt to the cantilever structure construction in various spans and under various conditions.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A height-adjustable cantilever structure assembly support device comprises a plurality of upper chords and a plurality of lower chords, a plurality of combined telescopic rods are installed between each group of the upper chords and the lower chords, and adjacent upper chords and adjacent lower chords are fixedly connected by splicing sleeves;

[0007] The combined telescopic rod includes a fixed sliding rod, a sliding rod sleeve, a threaded sleeve and a threaded connecting rod. The sliding rod sleeve is provided with a plurality of limit grooves. One end of the fixed sliding rod is slidably connected to the interior of the sliding rod sleeve and is fixedly connected with a limit ear corresponding to the limit groove. An elastic limit assembly is arranged in the limit groove. The elastic limit assembly is used to limit the limit ear in the limit groove. The other end of the fixed sliding rod is hingedly fixed to the upper chord rod by a first bolt, and the threaded connecting rod is hingedly fixed to the lower chord rod by a second bolt. The threaded sleeve is used to make the sliding rod sleeve and the threaded connecting rod approach or move away from each other.

[0008] Preferably, the upper chord and the lower chord both include a steel rod body, two T-shaped slide grooves are provided on one side of the steel rod body close to the combined telescopic rod, a plurality of first mounting holes are provided in the middle of the front side of the steel rod body, two second mounting holes are provided on the left and right sides of the front side of the steel rod body, and the first mounting holes and the second mounting holes both pass through the back side of the steel rod body.

[0009] Preferably, the plurality of combined telescopic rods are staggered front and rear and are respectively located inside the two front and rear T-shaped slide grooves.

[0010] Preferably, the left and right sides of the splicing sleeve are provided with mounting grooves that are compatible with the steel rod body, and the left and right sides of the front side of the splicing sleeve are provided with third mounting holes corresponding to the second mounting holes, and a third bolt is arranged inside the third mounting hole. The third bolt passes through the third mounting hole and the second mounting hole and is located on the back side of the splicing sleeve.

[0011] Preferably, the limiting groove comprises a vertical hole and a clamping hole, the inner wall of the sliding rod sleeve is provided with a sliding groove, the limiting ear is slidably connected inside the sliding groove, and the vertical hole is communicated with the sliding groove.

[0012] Preferably, the elastic limiting assembly includes an active tongue slidably connected to the inside of the vertical hole, an arc-shaped edge is provided at one end of the active tongue close to the hole, a positioning hole is provided at one end of the active tongue away from the hole, a spring is installed between the positioning hole and the inner wall of the vertical hole, and the active tongue is in an L-shaped structure and a paddle is installed on the outer surface.

[0013] Preferably, a limiting sleeve is sleeved on the outer surface of the top end of the sliding rod sleeve, the top end of the limiting sleeve is fixedly connected to the top end of the sliding rod sleeve by a screw, an operating hole corresponding to the paddle is opened on the outer surface of the limiting sleeve, and the paddle is fixedly connected to the movable latch by a screw.

[0014] Preferably, the end of the fixed slide rod away from the slide rod sleeve is fixedly connected with a first mounting ring, the first mounting ring is slidably connected in the T-shaped slide groove of the upper chord rod, the first bolt passes through the first mounting ring and the first mounting hole on the upper chord rod, the threaded connecting rod includes a second screw rod and a fixedly connected second mounting ring, the second mounting ring is slidably connected in the T-shaped slide groove of the lower chord rod, and the second bolt passes through the second mounting ring and the first mounting hole of the lower chord rod.

[0015] Preferably, a left-handed threaded hole and a right-handed threaded hole are respectively provided on the upper and lower sides of the threaded sleeve, and a first screw rod is fixedly connected to the end of the sliding rod sleeve away from the fixed sliding rod, and the first screw rod and the second screw rod are threadedly connected to the left-handed threaded hole and the right-handed threaded hole respectively, and a hexagon is fixedly connected to the middle part of the outer surface of the threaded sleeve.

[0016] A method for assembling a height-adjustable cantilever structure assembly support device comprises the following steps:

[0017] Step 1: According to the actual project needs, determine the actual required support device height and span, and adjust the length of the combined telescopic rod;

[0018] Step 2: insert the first mounting ring at the top of the combined telescopic rod into the T-shaped slot on the upper rear side of the upper chord and fix it with a first bolt, and then fix the second mounting ring at the bottom of the combined telescopic rod in the T-shaped slot on the front side of the lower chord with a second bolt, so that the upper and lower ends of the combined telescopic rod are respectively connected to the upper chord and the lower chord and are hinged and fixed together;

[0019] Step 3: Through the second mounting hole reserved at the end of the steel rod body, insert the ends of the two steel rod bodies into the mounting grooves at both ends of the splicing sleeve and fix them with the third bolt. Similarly, multiple sections of standard steel rod bodies can be spliced ​​to form a supporting truss, thereby realizing temporary adaptive adjustment of the cantilever span and adapting to a larger span;

[0020] Step 4: Use a wrench to remove the three first bolts fixing the upper chord rod, so that the upper chord rod and the lower chord rod are in contact and completely folded. Through simple operation, it is convenient for transportation or stacking.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] The above scheme is easy to disassemble and assemble. After the construction is completed, the bolts can be removed through simple operations to dismantle the entire support system, reducing the construction period and cost. In addition, the support system replaces the traditional cantilever H-shaped steel, has higher bearing capacity and anti-deformation ability, and the height of the support truss can be adjusted to increase the rigidity and bearing capacity to adapt to a larger span.

[0023] In the above scheme, according to the actual situation, through pre-calculation, accessories can be selected in advance, the truss part can be pre-installed and then hoisted, and then connected with the embedded parts, so as to quickly complete the support of the cantilever structure, shorten the construction preparation time, and improve efficiency. After the steel parts are processed and transported to the site, they can be connected by bolts without on-site welding, which is more environmentally friendly, safer and convenient for on-site construction.

[0024] In the above scheme, the accessories can be modularized. According to the actual cantilever length, the corresponding amount of materials can be pre-selected and recycled, which reduces material loss. The assembly of standard section truss supports can adapt to cantilever structures of various spans. The support truss height can be adjusted to adapt to heavy cantilever structures. It has wide versatility. At the same time, the support device can disassemble the device according to its components to facilitate transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0026] Figure 1 A schematic diagram of the structure of the installation of the supporting device for the height-adjustable cantilever structure on the main building;

[0027] Figure 2 A schematic diagram of the splicing structure of the upper chord and the lower chord of the support device for assembling the height-adjustable cantilever structure;

[0028] Figure 3 A schematic diagram of the connection structure of the upper chord and the lower chord of the support device for assembling the height-adjustable cantilever structure;

[0029] Figure 4 A schematic diagram of the sliding structure of the combined telescopic rods of the assembly support device for the height-adjustable cantilever structure;

[0030] Figure 5 A schematic diagram of a half-section structure along a slide slot of a combined telescopic rod of a support device for assembling a cantilever structure with adjustable height;

[0031] Figure 6 Assembling support devices for height-adjustable cantilever structures Figure 5 A schematic diagram of the enlarged structure at A in the middle;

[0032] Figure 7 A schematic diagram of a structure in which the limiting ear of the height-adjustable cantilever structure assembly support device is located in a clamping hole;

[0033] Figure 8 A schematic diagram of a structure in which the limiting ears of a support device for assembling a cantilever structure with adjustable height slide along a slide groove;

[0034] Fig. 9 A schematic diagram of the three-dimensional structure of a combined telescopic rod for assembling a support device for a cantilever structure with adjustable height;

[0035] Fig.10 Assembling support devices for height-adjustable cantilever structures Fig. 9 A schematic diagram of the enlarged structure at B in the middle;

[0036] Fig.11 A schematic diagram of the front view of the structure of the connection between the upper chord and the lower chord of the support device for assembling a cantilever structure with adjustable height;

[0037] Fig.12 A schematic diagram of a height-increasing structure for connecting an upper chord rod and a lower chord rod of a support device for assembling a cantilever structure with adjustable height;

[0038] Fig.13 A schematic diagram of the structure of assembling the upper chord and the lower chord of the support assembly device for the height-adjustable cantilever structure;

[0039] Fig.14 A schematic diagram of the structure for retracting the upper and lower chords of the support assembly device for the height-adjustable cantilever structure;

[0040] Fig.15 Schematic diagram of the contact structure between the upper chord and the lower chord of the support assembly device for the height-adjustable cantilever structure.

[0041] [reference numerals]

[0042] 1. Upper chord rod; 2. Lower chord rod; 3. Combined telescopic rod; 4. Splicing sleeve; 5. Fixed slide rod; 6. Slide rod sleeve; 7. Threaded sleeve; 8. Threaded connecting rod; 9. Limiting groove; 10. Limiting ear; 11. Elastic limiting assembly; 12. First bolt; 13. Second bolt; 101. Steel rod body; 102. T-shaped slide groove; 103. First mounting hole; 104. Second mounting hole; 401. Mounting groove; 402 , third mounting hole; 403, third bolt; 601, limit sleeve; 602, screw; 603, operating hole; 901, vertical hole; 902, clamping hole; 903, slide groove; 1101, movable clamping tongue; 1102, arc edge; 1103, positioning hole; 1104, spring; 1105, paddle; 14, first mounting ring; 15, second screw rod; 16, second mounting ring; 17, first screw rod; 18, hexagon.

[0043] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0044] The following is a detailed description of a cantilever structure assembly support device and an assembly method with adjustable height provided by the present invention in combination with the accompanying drawings and specific embodiments. It is also explained here that, in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0045] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0046] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0047] It will be understood that the meaning of “on,” “over,” and “above” in this disclosure should be interpreted in the broadest manner, so that “on” means not only “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” means not only “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0048] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0049] like Figure 1-15 As shown, an embodiment of the present invention provides a cantilever structure assembly support device with adjustable height, comprising a plurality of upper chords 1 and a plurality of lower chords 2, a plurality of combined telescopic rods 3 are installed between each group of upper chords 1 and lower chords 2, and adjacent upper chords 1 and adjacent lower chords 2 are fixedly connected by splicing sleeves 4;

[0050] The combined telescopic rod 3 includes a fixed slide rod 5, a slide rod sleeve 6, a threaded sleeve 7 and a threaded connecting rod 8. The slide rod sleeve 6 is provided with a plurality of limit grooves 9, the number of which is three. The limit grooves 9 are arranged along the length direction of the slide rod sleeve 6. One end of the fixed slide rod 5 is slidably connected to the inside of the slide rod sleeve 6 and is fixedly connected with a limit ear 10 corresponding to the limit groove 9. An elastic limit component 11 is arranged in the limit groove 9. The elastic limit component 11 is used to limit the limit ear 10 in the limit groove 9.

[0051] The other end of the fixed slide rod 5 is hingedly fixed to the upper chord rod 1 by a first bolt 12, and the threaded connecting rod 8 is hingedly fixed to the lower chord rod 2 by a second bolt 13. The threaded sleeve 7 is used to make the slide rod sleeve 6 and the threaded connecting rod 8 approach or move away from each other, thereby achieving the purpose of fine-tuning the length of the combined telescopic rod.

[0052] like Figure 1-4 As shown, in the present embodiment, the upper chord rod 1 and the lower chord rod 2 both include a steel rod body 101, and two T-shaped slots 102 are provided on one side of the steel rod body 101 close to the combined telescopic rod 3, a plurality of first mounting holes 103 are provided in the middle of the front side of the steel rod body 101, and two second mounting holes 104 are provided on the left and right sides of the front side of the steel rod body 101, and the first mounting holes 103 and the second mounting holes 104 both pass through the back side of the steel rod body 101, and the plurality of combined telescopic rods 3 are staggered front and back and are respectively located inside the two front and rear T-shaped slots 102, and mounting grooves 401 adapted to the steel rod body 101 are provided on the left and right sides of the splicing sleeve 4, and third mounting holes 402 corresponding to the second mounting holes 104 are provided on the left and right sides of the front side of the splicing sleeve 4, and a third bolt 403 is provided inside the third mounting hole 402, and the third bolt 403 passes through the third mounting hole 402 and the second mounting hole 104 and is located on the back side of the splicing sleeve 4.

[0053] A second mounting hole 104 is reserved at the end of the steel rod body 101. The ends of the two steel rod bodies 101 are inserted into the mounting grooves 401 at both ends of the splicing sleeve 4 and fixed with the third bolts 403. Similarly, multiple sections of standard steel rod bodies 101 can be spliced ​​to form a supporting truss, thereby achieving temporary adaptive adjustment of the cantilever span to adapt to a larger span.

[0054] like Figure 5-10 As shown, in this embodiment, the limiting groove 9 includes a vertical hole 901 and a clamping hole 902, a sliding groove 903 is provided on the inner wall of the slide rod sleeve 6, the limiting ear 10 is slidably connected to the inside of the sliding groove 903, the vertical hole 901 is connected to the sliding groove 903, and the elastic limiting component 11 includes a movable clamping tongue 1101 slidably connected to the inside of the vertical hole 901, and the end of the movable clamping tongue 1101 close to the clamping hole 902 is provided with an arc edge 1102, and the end of the movable clamping tongue 1101 away from the clamping hole 902 is provided with a positioning hole 1103, a spring 1104 is installed between the positioning hole 1103 and the inner wall of the vertical hole 901, the movable tongue 1101 is L-shaped and has a pick 1105 installed on the outer surface, the top outer surface of the slide rod sleeve 6 is sleeved with a limit sleeve 601, the top of the limit sleeve 601 is fixedly connected to the top of the slide rod sleeve 6 by a screw 602, the outer surface of the limit sleeve 601 is provided with an operating hole 603 corresponding to the pick 1105, and the pick 1105 is fixedly connected to the movable tongue 1101 by a screw. It should be noted that the top of the slide rod sleeve 6 is provided with a screw hole matching the screw 602.

[0055] Specifically, one end of the fixed slide bar 5 located inside the slide bar sleeve 6 has a pair of protruding parts, called stop ears 10, and the fixed slide bar 5 can slide along the slide groove 903 in the slide bar sleeve 6.

[0056] A movable latch 1101 is provided at the connection between the clamp hole 902 and the slide slot 903. The movable latch 1101 is arranged along the length direction of the slide slot 903, and is connected to the vertical hole 901 with a spring 1104 to adjust the extension and contraction. The movable latch 1101 has an arc edge 1102 on one side of the clamp hole 902 and a straight edge on the other side. The limiting sleeve 601 is sleeved on the outer surface of the slide rod sleeve 6 to limit the movable latch 1101 so that the movable latch 1101 can slide freely in the vertical hole 901 without falling off. It should be noted that the performance of the spring 1104 selected in the present technology can only be extended and contracted along the body length direction of the spring 1104 when squeezed by the movable latch 1101, and will not deviate.

[0057] like Figure 4 and Figure 5As shown, in this embodiment, one end of the fixed slide rod 5 away from the slide rod sleeve 6 is fixedly connected with a first mounting ring 14, the first mounting ring 14 is slidably connected in the T-shaped slide groove 102 of the upper chord rod 1, the first bolt 12 passes through the first mounting ring 14 and the first mounting hole 103 on the upper chord rod 1, the threaded connecting rod 8 includes a second screw rod 15 and a fixedly connected second mounting ring 16, the second mounting ring 16 is slidably connected in the T-shaped slide groove 102 of the lower chord rod 2, the second bolt 13 passes through the second mounting ring 16 and the first mounting hole 103 of the lower chord rod 2, wherein the first mounting ring 14 and the second mounting ring 16 slide in the T-shaped slide groove 102 and will not shake after being tightened by bolts.

[0058] In this way, the first mounting ring 14 at the top of the combined telescopic rod 3 can be inserted into the T-shaped slot 102 on the upper rear side of the upper chord rod 1 and hingedly fixed with the first bolt 12, and then the second mounting ring 16 at the bottom end of the combined telescopic rod 3 is hingedly fixed in the T-shaped slot 102 on the front side of the lower chord rod 2 with the second bolt 13, so that the upper and lower ends of the combined telescopic rod 3 are respectively connected to the upper chord rod 1 and the lower chord rod 2 and are hingedly fixed together.

[0059] like Figure 5 and Fig. 9 As shown, in this embodiment, a left-handed threaded hole and a right-handed threaded hole are respectively opened on the upper and lower sides of the threaded sleeve 7, and a first screw rod 17 is fixedly connected to the end of the slide rod sleeve 6 away from the fixed slide rod 5. The first screw rod 17 and the second screw rod 15 are threadedly connected to the left-handed threaded hole and the right-handed threaded hole respectively, and a hexagonal body 18 is fixedly connected to the middle of the outer surface of the threaded sleeve 7.

[0060] Specifically, both ends of the threaded sleeve 7 are provided with reverse threads to connect the slide rod sleeve 6 and the threaded connecting rod 8. The cross-sections of both ends of the threaded sleeve 7 are circular, and the middle is a regular hexagonal hexagonal body 18 to facilitate the wrench to twist.

[0061] The assembly method of the height-adjustable cantilever structure assembly support device provided by the present invention is as follows:

[0062] When the locking ear 10 moves along the sliding groove 903 to the locking hole 902 in the middle, the sliding rod sleeve 6 is rotated, and the locking ear 10 squeezes the arc edge 1102 and compresses the spring 1104 until the movable latch 1101 completely enters the inner part of the latch hole 902, and then the movable latch 1101 is reset under the action of the spring 1104, locking the locking ear 10 of the fixed sliding rod 5, thereby limiting the movement of the fixed sliding rod 5 and completing the increase of the height of the combined telescopic rod 3;

[0063] When lowering the height, the limiting ear 10 of the fixed slide bar 5 needs to be moved out of the slide groove 903, but the limiting ear 10 of the fixed slide bar 5 is stuck by the straight edge of the movable latch 1101. At this time, the paddle 1105 is moved from the operating hole 603 to move the movable latch 1101 upward, and then the fixed slide bar 5 remains stationary, and the reverse slide bar sleeve 6 is rotated to make the limiting ear 10 on the fixed slide bar 5 enter the slide groove 903 from the latch hole 902, and then the limiting ear 10 is moved to the lower latch hole 902;

[0064] The limiting ear 10 of the fixed slide bar 5 can be locked in the three clamping holes 902 in the slide bar sleeve 6, which respectively correspond to the three lengths of the combined telescopic rod 3. When the approximate length required by the structure is determined, the clamping holes 902 at the corresponding positions can be selected to limit the fixed slide bar 5, and then the hexagonal body 18 on the outer surface of the threaded sleeve 7 can be screwed with a wrench. Since the threads built into the two ends of the threaded sleeve 7 are in opposite directions, the combined telescopic rod 3 can be extended or shortened when the threaded sleeve 7 is screwed, thereby achieving the purpose of further slightly adjusting the length of the combined telescopic rod 3.

[0065] Step 2, insert the first mounting ring 14 at the top of the combined telescopic rod 3 into the T-shaped slot 102 on the rear side of the upper chord rod 1, at this time, the first mounting ring 14 can slide along the T-shaped slot 102 until it is aligned with the through hole on the first mounting ring 14 and the first mounting hole 103 on the far right, then pass the first bolt 12 through the first mounting hole 103 and the first mounting ring 14 and hinge fix it to the upper chord rod 1, and then use the same method to hinge and fix the second mounting ring 16 at the bottom end of the combined telescopic rod 3 with the second bolt 13 in the T-shaped slot 102 on the front side of the lower chord rod 2, until multiple combined telescopic rods 3 are hinged and fixed in sequence front and back, and the two combined telescopic rods 3 in the middle are fixed by one bolt, so that the upper and lower ends of the combined telescopic rod 3 are respectively connected to the upper chord rod 1 and the lower chord rod 2 and hinged and fixed together;

[0066] Step 3: Splice the standard section support truss. The second mounting hole 104 is reserved at the end of the steel rod body 101. Insert the ends of the two steel rod bodies 101 into the mounting grooves 401 at both ends of the splicing sleeve 4, and align the second mounting hole 104 at the end of the steel rod body 101 with the third mounting hole 402 in the splicing sleeve 4. Then insert the third bolt 403 into the aligned mounting hole and tighten it. At this time, the two standard steel rod bodies 101 are assembled. Similarly, multiple sections of standard steel rod bodies 101 can be spliced, so as to achieve temporary adaptive adjustment of the cantilever span.

[0067] At this time, multiple upper chords 1 and lower chords 2 composed of the steel rod body 101 are spliced ​​into one by the splicing sleeve 4 and multiple third bolts 403 to form a supporting truss, thereby achieving the purpose of adjustable span according to actual construction requirements. After assembly, the inner ends of the upper chords 1 and lower chords 2 are fixed to the floor slab through U-shaped anchor rings pre-buried in the building, and adjacent rows of supporting trusses are reinforced by diagonal braces to prevent overturning, thereby adapting to a larger span, increasing rigidity and reducing vertical deflection.

[0068] Step 4. Use a wrench to remove the three first bolts 12 that fix the upper upper chord rod 1. At this time, the first mounting ring 14 at the end of the fixed slide rod 5 can slide arbitrarily in the T-shaped slide groove 102. At this time, the ends of the two fixed slide rods 5 originally fixed by the same first bolt 12 slide relative to each other along the T-shaped slide groove 102. As the ends of the fixed slide rods 5 slide relative to each other, viewed from the front, the combined telescopic rods 3 cross each other, and the heights of the upper chord rod 1 and the lower chord rod 2 are gradually reduced. When the upper chord rod 1 and the lower chord rod 2 are in contact, the entire combined telescopic rod 3 is embedded in the interior of the T-shaped slide groove, achieving complete folding. Through simple operation, it can be folded when not in use, thereby facilitating transportation or stacking.

[0069] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A height-adjustable cantilever structure assembly support device, characterized in that: It comprises a plurality of upper chord rods (1) and a plurality of lower chord rods (2), a plurality of combined telescopic rods (3) are installed between each group of the upper chord rods (1) and the lower chord rods (2), and adjacent upper chord rods (1) and adjacent lower chord rods (2) are fixedly connected via a splicing sleeve (4); The combined telescopic rod (3) comprises a fixed sliding rod (5), a sliding rod sleeve (6), a threaded sleeve (7) and a threaded connecting rod (8); the sliding rod sleeve (6) is provided with a plurality of limiting grooves (9); one end of the fixed sliding rod (5) is slidably connected to the interior of the sliding rod sleeve (6) and is fixedly connected to a limiting ear (10) corresponding to the limiting groove (9); an elastic limiting component (11) is arranged in the limiting groove (9); the elastic limiting component (11) is used to limit the limiting ear (10) in the limiting groove (9); the other end of the fixed sliding rod (5) is hingedly fixed to the upper chord rod (1) by a first bolt (12); the threaded connecting rod (8) is hingedly fixed to the lower chord rod (2) by a second bolt (13); and the threaded sleeve (7) is used to make the sliding rod sleeve (6) and the threaded connecting rod (8) approach or move away from each other.

2. The height-adjustable cantilever structure assembly support device according to claim 1, characterized in that: The upper chord rod (1) and the lower chord rod (2) both comprise a steel rod body (101); two T-shaped sliding grooves (102) are provided on one side of the steel rod body (101) close to the combined telescopic rod (3); a plurality of first mounting holes (103) are provided in the middle of the front side of the steel rod body (101); two second mounting holes (104) are provided on both the left and right sides of the front side of the steel rod body (101); and the first mounting hole (103) and the second mounting hole (104) both pass through the back side of the steel rod body (101).

3. The height-adjustable cantilever structure assembly support device according to claim 2, characterized in that: The plurality of combined telescopic rods (3) are arranged in an interlaced manner in the front and rear and are respectively located inside the two front and rear T-shaped sliding grooves (102).

4. The height-adjustable cantilever structure assembly support device and assembly method according to claim 2, characterized in that: The left and right sides of the splicing sleeve (4) are provided with mounting grooves (401) adapted to the steel rod body (101), and the left and right sides of the front side of the splicing sleeve (4) are provided with third mounting holes (402) corresponding to the second mounting holes (104). A third bolt (403) is arranged inside the third mounting hole (402), and the third bolt (403) passes through the third mounting hole (402) and the second mounting hole (104) and is located on the back side of the splicing sleeve (4).

5. The height-adjustable cantilever structure assembly support device according to claim 1, characterized in that: The limiting groove (9) comprises a vertical hole (901) and a clamping hole (902); the inner wall of the sliding rod sleeve (6) is provided with a sliding groove (903); the limiting ear (10) is slidably connected inside the sliding groove (903); and the vertical hole (901) is communicated with the sliding groove (903).

6. The height-adjustable cantilever structure assembly support device according to claim 5, characterized in that: The elastic limiting component (11) comprises an active latch tongue (1101) slidably connected to the inside of the vertical hole (901); an arc-shaped edge (1102) is arranged at one end of the active latch tongue (1101) close to the latch hole (902); a positioning hole (1103) is arranged at one end of the active latch tongue (1101) away from the latch hole (902); a spring (1104) is installed between the positioning hole (1103) and the inner wall of the vertical hole (901); the active latch tongue (1101) is in an L-shaped structure and a paddle (1105) is installed on the outer surface.

7. The height-adjustable cantilever structure assembly support device according to claim 6, characterized in that: A limiting sleeve (601) is sleeved on the outer surface of the top end of the slide rod sleeve (6), and the top end of the limiting sleeve (601) is fixedly connected to the top end of the slide rod sleeve (6) via a screw (602). An operating hole (603) corresponding to the paddle (1105) is formed on the outer surface of the limiting sleeve (601), and the paddle (1105) is fixedly connected to the movable latch (1101) via a screw.

8. The height-adjustable cantilever structure assembly support device according to claim 1, characterized in that: The end of the fixed slide rod (5) away from the slide rod sleeve (6) is fixedly connected with a first mounting ring (14), the first mounting ring (14) is slidably connected in the T-shaped slide groove (102) of the upper chord rod (1), the first bolt (12) passes through the first mounting ring (14) and the first mounting hole (103) on the upper chord rod (1), the threaded connecting rod (8) includes a second screw rod (15) and a fixedly connected second mounting ring (16), the second mounting ring (16) is slidably connected in the T-shaped slide groove (102) of the lower chord rod (2), and the second bolt (13) passes through the second mounting ring (16) and the first mounting hole (103) of the lower chord rod (2).

9. The height-adjustable cantilever structure assembly support device according to claim 8, characterized in that: The threaded sleeve (7) is provided with a left-handed threaded hole and a right-handed threaded hole on the upper and lower sides respectively; the end of the slide rod sleeve (6) away from the fixed slide rod (5) is fixedly connected to a first screw rod (17); the first screw rod (17) and the second screw rod (15) are respectively threadedly connected to the left-handed threaded hole and the right-handed threaded hole; a hexagonal body (18) is fixedly connected to the middle of the outer surface of the threaded sleeve (7).

10. An assembly method for the height-adjustable cantilever structure assembly support device according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: According to the actual engineering needs, determine the actual required height and span of the support device, and adjust the length of the combined telescopic rod (3); Step 2: insert the first mounting ring (14) at the top of the combined telescopic rod (3) into the T-shaped slide groove (102) on the upper rear side of the upper chord rod (1) and hinge it with the first bolt (12); then hinge the second mounting ring (16) at the bottom of the combined telescopic rod (3) into the T-shaped slide groove (102) on the front side of the lower chord rod (2) with the second bolt (13), thereby connecting the upper and lower ends of the combined telescopic rod (3) to the upper chord rod (1) and the lower chord rod (2) and hinge them together; Step 3: Through the second mounting hole (104) reserved at the end of the steel rod body (101), the ends of the two steel rod bodies (101) are inserted into the mounting grooves (401) at both ends of the splicing sleeve (4) and fixed with the third bolt (403). Similarly, multiple sections of standard steel rod bodies (101) can be spliced ​​to form a supporting truss, thereby achieving temporary adaptive adjustment of the cantilever span to adapt to a larger span; Step 4: Use a wrench to remove the three first bolts (12) fixing the upper chord rod (1), so that the upper chord rod (1) and the lower chord rod (2) are in contact and completely folded, and the transportation or stacking is convenient through simple operation.

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