A formwork support device and method for cast-in-place slab strips in a precast composite slab system.

Abstract

This invention relates to a formwork support device and method for cast-in-place slab strips in a precast composite slab system. The formwork support device includes a first horizontal plate, a template, two second horizontal plates, support members, a screw nut pair, and a locking member. The template is attached to the bottom of the precast composite slab, and the first horizontal plate is located below the template. The two second horizontal plates are arranged vertically at intervals, with support members fixed between their ends. The two second horizontal plates and the two support members together form a square structure. The support member has a sliding channel that extends through itself, and the cross-section of the sliding channel is a non-circular channel. The movable nut of the screw nut pair is slidably connected within the sliding channel and extends from below the sliding channel, abutting against the top of the precast composite slab. The screw of the screw nut pair extends from above the sliding channel. The top ends of the screws of the screw nut pairs in the two support members are connected by a synchronous linkage member for synchronous linkage. The locking member connects and fixes the template, the first horizontal plate, and the two second horizontal plates.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a formwork support device and method for cast-in-place slab strips in a precast composite slab system. Background Technology

[0002] Currently, in the process of casting roofs with precast composite slabs, the cast-in-place strips between the precast composite slabs are often cast using bottom-supported formwork or suspended formwork. This method requires a lot of manual labor and is inconvenient. In addition, a steel wire layer is set on the surface of the precast composite slabs, and the suspended formwork usually needs to be supported by pad blocks. This is also inconvenient to operate and the suspended formwork is not easy to recycle. Therefore, a formwork support device for the cast-in-place strips of the precast composite slab system is proposed. Summary of the Invention

[0003] The technical problem to be solved by this invention is how to improve the process of casting precast composite slab roofs. In the process of casting the cast-in-place slab strips between precast composite slabs, the bottom support formwork or hanging formwork is often used for casting. This requires a lot of manual operation and is not convenient. At the same time, steel wire layer is set on the surface of precast composite slabs. Ordinary hanging formwork often requires the use of pad blocks to support the hanging formwork tools. This is also not convenient to operate and the hanging formwork tools are not easy to recycle.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A formwork support device for cast-in-place slab strips of precast composite slab system, comprising a first horizontal plate, a template, two second horizontal plates, support members, a screw nut pair, and a locking member. The template is attached to the bottom of the precast composite slab, and the first horizontal plate is located below the template. The two second horizontal plates are arranged vertically at intervals and the support members are fixed between their ends. The two second horizontal plates and the two support members together form a square structure. The support member has a sliding channel that penetrates itself, and the cross-section of the sliding channel is a non-circular channel. The movable column of the screw nut pair is slidably connected in the sliding channel and extends from below the sliding channel and abuts against the top of the precast composite slab. The screw of the screw nut pair extends from above the sliding channel. The top ends of the screws of the screw nut pairs in the two support members are connected by a synchronous linkage member for synchronous linkage. The locking member connects and fixes the template, the first horizontal plate, and the two second horizontal plates.

[0005] The beneficial effects of the present invention are: the formwork support device of the present invention has a simple structure and is easy to operate. It can use the movable column of the nut of two screw nut pairs to pass through the steel reinforcement layer and be supported on the precast composite slab. The support height can be adjusted as needed. It is easy to operate and easy to recycle.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the cross-section of the sliding channel is a polygonal or elliptical structure.

[0008] The beneficial effect of adopting the above-mentioned further solution is that the shape of the nut movable column is adapted to the sliding channel, which facilitates the sliding of the nut movable column along the sliding channel.

[0009] Furthermore, in the two second horizontal plates, the upper second horizontal plate has a drive groove, the upper ends of the sliding channels of the two support members are respectively connected to the two ends of the drive groove, and the synchronous linkage member is located in the drive groove.

[0010] The advantage of adopting the above-mentioned further solution is that the synchronous linkage component can be hidden inside the drive slot.

[0011] Furthermore, the synchronous linkage includes a belt drive mechanism or a sprocket and chain drive mechanism.

[0012] Furthermore, the belt drive mechanism includes a belt and pulleys, with pulleys fixed to the top of the screws of both screw-nut pairs, and belts fitted onto the two pulleys; the sprocket and chain drive mechanism includes sprockets and chains, with sprockets fixed to the top of the screws of both screw-nut pairs, and chains fitted onto the two sprockets.

[0013] Furthermore, a polygonal prism is provided at the center of the synchronous linkage at the top of the lead screw of the lead screw nut pair in each support member, or the top of the lead screw of the lead screw nut pair in each support member extends out of the synchronous linkage and is fixed with a polygonal prism; the polygonal prism is located on the upper outer side of the upper second horizontal plate among the two second horizontal plates.

[0014] The advantage of adopting the above-mentioned further solution is that it facilitates the rotation of the polygonal prism to adjust the formwork height.

[0015] Furthermore, the locking component includes a pull screw, a first threaded sleeve, and a second threaded sleeve. The pull screw passes through the template, the first horizontal plate, and the second horizontal plate. The upper end of the pull screw passes upward through the two second horizontal plates and is threadedly connected to the first threaded sleeve. The lower end of the pull screw passes downward through the template and the first horizontal plate and is threadedly connected to the second threaded sleeve.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the first threaded sleeve or the second threaded sleeve can be screwed on for locking and fixing.

[0017] Furthermore, the first threaded sleeve is located above the synchronous linkage component, and the first threaded sleeve abuts against the upper surface of the upper second horizontal plate of the two second horizontal plates.

[0018] The advantage of adopting the above-mentioned further solution is that it avoids interfering with the operation of the synchronous linkage components.

[0019] Furthermore, pressure blocks are respectively provided between the two ends of the first horizontal plate and the two ends of the template.

[0020] A formwork support method for cast-in-place slab strips in a precast composite slab system, using the aforementioned formwork support device, includes the following steps: A template is attached to the bottom of the cast-in-place slab strip formed between two precast composite slabs. A locking element is then inserted through the first horizontal plate, the template, and the second horizontal plate. At this point, the movable column of the screw nut pair abuts against the top of the precast composite slab. Then, the screw or synchronous linkage on one of the screw nut pairs is adjusted. Under the action of the synchronous linkage, the other screw nut pair can be rotated simultaneously, causing the movable columns of the nuts of both screw nut pairs to extend downwards simultaneously, supporting the two second horizontal plates. After reaching the formwork height for the cast-in-place layer, the locking element is used to lock the first horizontal plate, the template, and the second horizontal plate, causing the first horizontal plate to move upwards to compress and fix the template, and the second horizontal plate to be positioned above the top reinforcement layer of the precast composite slab for formwork support.

[0021] The beneficial effects of the present invention are: the formwork support method of the present invention is easy to operate, and the movable column of the nut of the two lead screw nut pairs can pass through the steel reinforcement layer and be supported on the precast composite slab. The support height can be adjusted as needed. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main structure of the formwork support device for the cast-in-place slab strip of the precast composite slab system of the present invention;

[0023] Figure 2 This is a cross-sectional structural schematic diagram of the formwork support device for the cast-in-place slab strip of the precast composite slab system of the present invention.

[0024] Figure 3 for Figure 2 Enlarged structural diagram of section A in the middle;

[0025] Figure 4 This is a top view of the formwork support device for the cast-in-place slab strip of the precast composite slab system of the present invention.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 100. Precast composite slab; 200. Formwork support device; 211. First horizontal plate; 212. Pressing block; 220. Template; 230. Second horizontal plate; 231. Drive groove; 240. Support component; 242. Sliding channel; 243. Lead screw; 2431. Polygonal prism; 244. Nut movable column; 250. Synchronous linkage component; 251. Sprocket; 252. Chain; 260. Locking component; 261. Pull screw; 262. First threaded sleeve; 263. Second threaded sleeve; 300. Reinforcing steel layer. Detailed Implementation

[0028] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0029] like Figures 1-4 As shown, a formwork support device 200 for a precast composite slab system cast-in-place strip according to this embodiment includes a first horizontal plate 211, a template 220, two second horizontal plates 230, a support member 240, a screw and nut pair, and a locking member 260. The template 220 is attached to the bottom of the precast composite slab 100, and the first horizontal plate 211 is located below the template 220. The two second horizontal plates 230 are arranged vertically at intervals and the support member 240 is fixed between their two ends. The two second horizontal plates 230 and the two support members 240 together form a square structure. The support member 240 has a sliding channel 2 that passes through it. 42. The cross-section of the sliding channel 242 is a non-circular channel; the movable nut column 244 of the lead screw nut pair is slidably connected in the sliding channel 242 and extends from below the sliding channel 242 and abuts against the top of the prefabricated composite plate 100; the lead screw 243 of the lead screw nut pair extends from above the sliding channel 242; the top ends of the lead screw 243 of the lead screw nut pair in the two support members 240 are connected by the synchronous linkage member 250 for synchronous linkage; the locking member 260 connects and fixes the template 220, the first horizontal plate 211 and the two second horizontal plates 230.

[0030] Specifically, the top surface of the lead screw 243 of the lead screw nut assembly is interference-fitted with a bearing, which can be embedded inside the second horizontal plate 230. This makes it easy to fix the lead screw 243 and also facilitates the rotation of the lead screw.

[0031] A further embodiment of this invention is that the cross-section of the sliding channel 242 is a polygonal or elliptical structure. The shape of the movable nut post is adapted to the sliding channel, facilitating the sliding of the movable nut post along the sliding channel. Preferably, the sliding channel 242 can have a square cross-section, and the cross-section of the movable nut post 244 can also be a square structure, facilitating the sliding of the movable nut post 244 up and down within the sliding channel 242.

[0032] like Figures 2-4 As shown, among the two second horizontal plates 230, the upper second horizontal plate 230 has a drive groove 231. The upper ends of the sliding channels 242 of the two support members 240 are respectively connected to the two ends of the drive groove 231. The synchronous linkage member 250 is located in the drive groove 231, which can hide the synchronous linkage member in the drive groove.

[0033] Specifically, the synchronous linkage 250 includes a belt drive mechanism or a sprocket and chain drive mechanism. The belt drive mechanism includes a belt and pulleys, with pulleys fixed to the top of the lead screws of the two lead screw nut pairs, and belts fitted onto the two pulleys; the sprocket and chain drive mechanism includes sprockets 251 and chains 252, with sprockets 251 fixed to the top of the lead screws 243 of the two lead screw nut pairs, and chains 252 meshing onto the two sprockets 251.

[0034] like Figure 2 and Figure 3 As shown, a polygonal prism 2431 is provided at the center of the synchronous linkage 250 at the top of the lead screw 243 of the lead screw nut pair in each support member 240, or the top of the lead screw 243 of the lead screw nut pair in each support member 240 extends out of the synchronous linkage 250 and is fixed with a polygonal prism 2431; the polygonal prism 2431 is located on the outer side above the upper second horizontal plate 230 of the two second horizontal plates 230. This facilitates the adjustment of the formwork height by turning the polygonal prism.

[0035] Specifically, the polygonal prism 2431 is a hexagonal prism. Here, an internal hex wrench is connected to the hexagonal prism to drive the lead screw 243 to rotate. Under the action of the sprocket 251 and the chain 252, another lead screw 243 can be driven to rotate at the same time, so that the movable nut column 244 extends downward to support the second horizontal plate 230. This allows the second horizontal plate 230 to be positioned above the steel reinforcement layer 300 on the top surface of the precast composite slab 100 for formwork support.

[0036] like Figure 1 , Figure 2 and Figure 4 As shown, a specific embodiment of the locking member 260 includes a pull screw 261, a first threaded sleeve 262, and a second threaded sleeve 263. The pull screw 261 passes through the template 220, the first horizontal plate 211, and the second horizontal plate 230. The upper end of the pull screw 261 passes upward through the two second horizontal plates 230 and is threadedly connected to the first threaded sleeve 262. The lower end of the pull screw 261 passes downward through the template 220 and the first horizontal plate 211 and is threadedly connected to the second threaded sleeve 263. The locking mechanism can be tightened by turning either the first or second threaded sleeve.

[0037] Specifically, the maximum outer diameter of both the first threaded sleeve 262 and the second threaded sleeve 263 is greater than the width of the drive groove 231. This is to avoid interference with the synchronous linkage 250 within the drive groove 231.

[0038] like Figure 1 , Figure 2 and Figure 4As shown, the first threaded sleeve 262 is located above the synchronous linkage 250, and the first threaded sleeve 262 abuts against the upper surface of the upper second horizontal plate 230 of the two second horizontal plates 230, so as to avoid interfering with the operation of the synchronous linkage.

[0039] like Figure 1 , Figure 2 and Figure 4 As shown, pressure blocks 212 are respectively provided between the two ends of the first horizontal plate 211 and the two ends of the template 220. The pressure blocks 212 are made of rigid material and allow for a uniformly spaced gap between the first horizontal plate 211 and the template 220. The pressure blocks 212 are fixed to the top two sides of the first horizontal plate 211 and fit against the bottom surface of the template 220. The distribution of the pressure blocks 212 on both sides of the template 220 facilitates better compression of the template 220, improving the sealing between the template 220 and the precast composite plate 100.

[0040] The formwork support device in this embodiment has a simple structure and is easy to operate. It can use the movable column of the nut of two screw nut pairs to pass through the steel reinforcement layer and be supported on the precast composite slab. The support height can be adjusted as needed. It is easy to operate and easy to recycle.

[0041] This embodiment provides a formwork support method for a precast composite slab system cast-in-place strip, implemented using the aforementioned formwork support device 200 for the precast composite slab system cast-in-place strip. The method includes the following steps: A template 220 is attached to the bottom of the cast-in-place strip formed between two precast composite slabs 100; a locking member 260 passes through the first horizontal plate 211, the template 220, and the second horizontal plate 230; pressure blocks 212 are attached to both sides of the template 220; and then the first threaded sleeve 262 and the second threaded sleeve 263 are installed at both ends of the tie rod 261. At this time, the movable nut column 244 of the screw nut pair abuts against the top of the precast composite slab 100. Thus, under the action of the synchronous linkage member 250, another screw nut pair can be driven to rotate simultaneously, causing the movable nut columns 244 of both screw nut pairs to extend downwards simultaneously, thus opening the two second... After the horizontal plate 230 is raised to the required height for the cast-in-place layer formwork, an internal hex wrench is attached to the polygonal prism 2431 to rotate the screw 243. The locking device 260 is used to lock the first horizontal plate 211, the template 220, and the second horizontal plate 230, causing the first horizontal plate 211 to move upward and press and fix the template 220. This allows the second horizontal plate 230 to be positioned above the top reinforcement layer 300 of the precast composite slab 100 for formwork support. In this way, it is not necessary to use the bottom support template 220 for pouring during the formwork support process, and it is also not necessary to use pads to support the formwork lifting equipment. Moreover, it is convenient to deal with reinforcement layers of different heights on the top surface of the precast composite slab 100. After the pouring is completed, the nut movable column 244 can be pulled out of the concrete for easier use and repeated use.

[0042] The formwork support method in this embodiment is easy to operate. It can utilize the movable columns of the nuts of two lead screw nut pairs to pass through the steel reinforcement layer and be supported on the precast composite slab. The support height can be adjusted as needed.

[0043] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A formwork support device for a precast composite slab system with cast-in-place slab strips, characterized in that, The assembly includes a first horizontal plate, a template, two second horizontal plates, support members, a screw and nut pair, and a locking member. The template is attached to the bottom of the precast composite slab, and the first horizontal plate is located below the template. The two second horizontal plates are arranged vertically at intervals, with support members fixed between their ends. The two second horizontal plates and the two support members together form a square structure. The support member has a sliding channel that extends through itself, and the cross-section of the sliding channel is a non-circular channel. The movable nut of the screw and nut pair is slidably connected within the sliding channel and extends from below the sliding channel, abutting against the top of the precast composite slab. The screw of the screw and nut pair extends from above the sliding channel. The top ends of the screws of the screw and nut pairs within the two support members are connected by a synchronous linkage member for synchronous linkage. The locking member connects and fixes the template, the first horizontal plate, and the two second horizontal plates. The cross-section of the sliding channel is a polygonal or elliptical structure; Of the two second horizontal plates, the upper second horizontal plate has a drive groove, the upper ends of the sliding channels of the two support members are respectively connected to the two ends of the drive groove, and the synchronous linkage member is located in the drive groove; The synchronous linkage includes a belt drive mechanism or a sprocket and chain drive mechanism; the belt drive mechanism includes a belt and a pulley, and the top of the lead screw of each of the two lead screw nut pairs is fixed with a pulley, and a belt is sleeved on the two pulleys; the sprocket and chain drive mechanism includes a sprocket and a chain, and the top of the lead screw of each of the two lead screw nut pairs is fixed with a sprocket, and a chain is sleeved on the two sprockets. The center of the synchronous linkage at the top of the lead screw of the lead screw nut pair in each support member is provided with a polygonal prism, or the top of the lead screw of the lead screw nut pair in each support member passes through the synchronous linkage and is fixed with a polygonal prism; the polygonal prism is located on the upper outer side of the upper second horizontal plate among the two second horizontal plates.

2. The formwork support device for a precast composite slab system with cast-in-place slab strip according to claim 1, characterized in that, The locking component includes a pull screw, a first threaded sleeve, and a second threaded sleeve. The pull screw passes through the template, the first horizontal plate, and the second horizontal plate. The upper end of the pull screw passes upward through the two second horizontal plates and is threadedly connected to the first threaded sleeve. The lower end of the pull screw passes downward through the template and the first horizontal plate and is threadedly connected to the second threaded sleeve.

3. The formwork support device for a precast composite slab system with cast-in-place slab strip according to claim 2, characterized in that, The first threaded sleeve is located above the synchronous linkage component, and the first threaded sleeve abuts against the upper surface of the upper second horizontal plate of the two second horizontal plates.

4. The formwork support device for a precast composite slab system with cast-in-place slab strip according to claim 1, characterized in that, Pressure blocks are provided between the two ends of the first horizontal plate and the two ends of the template.

5. A formwork support method for cast-in-place slab strips in a precast composite slab system, characterized in that, The formwork support device for the cast-in-place slab strip of the precast composite slab system as described in any one of claims 1 to 4 is implemented by the following steps: the template is attached to the bottom of the cast-in-place slab strip formed between two precast composite slabs, and then the locking member passes through the first horizontal plate, the template and the second horizontal plate. At this time, the movable column of the nut of the screw nut pair abuts against the top of the precast composite slab. Then, the screw or synchronous linkage on one of the screw nut pairs is adjusted. Under the action of the synchronous linkage, the other screw nut pair can be driven to rotate at the same time, so that the movable column of the nut of the two screw nut pairs extends downward at the same time to support the two second horizontal plates. After reaching the formwork support height of the cast-in-place layer, the locking member is used to lock the first horizontal plate, the template and the second horizontal plate, so that the first horizontal plate moves upward to squeeze and fix the template, and the second horizontal plate is positioned above the top reinforcement layer of the precast composite slab for formwork support operation.

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