Detachable bottom mold steel bar truss floor support plate

Abstract

The application discloses a detachable bottom die steel bar truss floor support plate, which comprises a bottom die, at least one truss unit is detachably arranged on the bottom die, the truss unit is composed of a steel bar truss and a movable buckle device, the movable buckle device is detachably arranged on the bottom die, and the steel bar truss is connected with the bottom die through the movable buckle device.

Description

Technical Field

[0001] This invention belongs to the field of building component technology, and in particular relates to a detachable bottom formwork steel truss floor deck. Background Technology

[0002] Floor slabs are a very important component of buildings. Existing floor slabs are generally made of reinforced concrete. For ease of construction, some of the reinforcing bars in the floor slab can be made into steel trusses. Typically, a steel truss includes one top chord and two bottom chords. The bottom chords are fixedly connected to the top chords through web reinforcement. The bottom formwork is detachably connected to the bottom chords through special connectors. The steel truss and the bottom formwork are combined to form a detachable bottom formwork steel truss floor deck. During construction, multiple detachable bottom formwork steel truss floor decks are spliced ​​together, and then concrete is poured directly into them. After the reinforced concrete has solidified, the bottom formwork is disassembled and recycled.

[0003] Currently, most specialized connectors use fasteners and bolts with horizontally oriented openings. The fasteners have screw holes, and the bottom mold has through holes. The bolts pass through the through holes and are screwed into the screw holes. When assembling the fasteners with the lower chord reinforcing bars, the two lower chord reinforcing bars need to be bent inwards or outwards by a machine. Then, the bent lower chord reinforcing bars are moved to the opening of the fasteners, and the lower chord reinforcing bars are released. The lower chord reinforcing bars are restored and engage with the fasteners. The assembly is quite cumbersome. Although the lower chord reinforcing bars have a certain degree of elasticity, they are difficult to fully recover after the removal of external force, and there is still a risk of bending, which reduces reliability.

[0004] Meanwhile, since the above assembly process requires the use of specialized machines, the detachable bottom formwork steel truss floor deck needs to be assembled in the factory and then transported to the construction site. However, the assembled detachable bottom formwork steel truss floor deck has a large overall structure, occupies a large area, and has high transportation costs.

[0005] Alternatively, the special connector can be detachably connected to the bottom formwork via bolts and nuts. Then, the lower chord steel bar is welded and fixed to the special connector. However, welding can only be done in the factory, which is more complicated. It also needs to be assembled in the factory and then transported to the construction site for use. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a manually assembled, detachable bottom formwork steel truss floor deck, which is relatively simple to assemble and has good reliability.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a detachable bottom formwork steel truss floor deck, including a bottom formwork, on which at least one truss unit is detachably provided, the truss unit is composed of a steel truss and a movable buckle device, the movable buckle device is detachably provided on the bottom formwork, and the steel truss is connected to the bottom formwork through the movable buckle device.

[0008] The steel truss includes two lower chord steel bars. The movable clamping device includes multiple fixed plates perpendicular to the lower chord steel bars. The fixed plates are detachably mounted on the bottom formwork. Each fixed plate has two first slots and a movable plate for opening or closing the first slots. The lower chord steel bars are embedded in the first slots. During assembly, the two lower chord steel bars are inserted one-to-one into the two first slots, and then the movable plate closes the first slots, confining the lower chord steel bars within them. Assembly can be completed manually by workers, making the assembly relatively simple.

[0009] The first slot includes a first channel and a first oblong hole extending along the length of the fixed plate. The first oblong hole communicates with the upper end face of the fixed plate through the first channel. The lower chord reinforcing bar is embedded in the first oblong hole. The movable plate is used to open or close the first oblong hole. When the movable plate opens the first oblong hole, the lower chord reinforcing bar can be inserted into the first oblong hole through the first channel. When the movable plate closes the first oblong hole, the lower chord reinforcing bar is confined within the first oblong hole, completing the locking process. The operation is relatively simple.

[0010] The movable plate and the fixed plate slide horizontally together. The movable plate is provided with two second slots, each including a second channel corresponding to the first channel and a second oblong hole extending along the length of the movable plate. The second oblong hole is connected to the upper end face of the movable plate through the second channel. Initially, the first channel and the second channel overlap, and the first oblong hole and the second oblong hole partially overlap. The lower chord steel bar can be inserted into the first oblong hole through the first channel. When locked, the movable plate is pushed to slide, causing the first channel and the second channel to be misaligned, the first oblong hole to close, and the first oblong hole and the second oblong hole to engage and lock the lower chord steel bar.

[0011] The fixed plates of adjacent truss units are integrally connected, and the movable plates of adjacent truss units are integrally connected. In this structure, the integral connection of the fixed plates forms transverse reinforcement perpendicular to the steel truss. The transverse reinforcement and the steel truss work together to form a mesh reinforcement, which helps to enhance the structural strength of the steel truss and improve its reliability. By integrally connecting the movable plates, the structural strength of the transverse reinforcement formed by the fixed plates is improved. At the same time, the sliding movable plates can close multiple first waist-shaped holes at one time, which helps to improve assembly efficiency.

[0012] The movable plate is rotatably mounted on the fixed plate. One end of the movable plate is provided with a hook, which engages with a first slot to form a first locking hole that restricts the movement of one of the lower chord reinforcing bars. In this structure, when the lower chord reinforcing bar is inserted into the first slot, rotating the movable plate causes the hook to close the first slot and hook onto the lower chord reinforcing bar. The hook and the first slot engage to lock the lower chord reinforcing bar. Since the steel truss is a single unit, once one lower chord reinforcing bar is locked, the other lower chord reinforcing bar cannot disengage from the other first slot.

[0013] The movable plate is located between the two first slots. A limiting plate is provided at the other end of the movable plate. The limiting plate cooperates with the other first slot to form a second locking hole that restricts the movement of the other lower chord reinforcing bar. In this structure, the movable plate can close one first slot via a hook and the other first slot via the limiting plate. One movable plate can simultaneously control the state of both first slots, ensuring stability and reliability.

[0014] The fixed plates of adjacent truss units are integrally connected. In this structure, the integral connection of the fixed plates forms transverse reinforcement perpendicular to the steel truss. The transverse reinforcement and the steel truss work together to form a mesh reinforcement, which helps to enhance the structural strength of the steel truss and improve its reliability.

[0015] The fixed plate includes a base plate and a connecting plate that are bent and connected to each other. The base plate is detachably mounted on the bottom mold, and the connecting plate is provided with two first slots and the connecting plate itself. In this structure, the base plate and the connecting plate are bent and connected to each other to form angle steel, resulting in high structural strength and good reliability.

[0016] The bottom formwork has a first through hole, and the base plate has a second through hole, a nut, and two supports. The nut and the two supports are located on the lower end face of the base plate, with the two supports distributed on both sides of the nut. Bolts pass through the first and second through holes and are screwed into the nut. In this structure, by placing the nut on the lower end face of the base plate, the base plate is raised, leaving a certain gap between the base plate and the bottom formwork. When concrete is poured, the concrete can fill this gap and wrap the base plate. After the concrete solidifies and the bottom formwork is removed, only the lower end face of the nut and the supports of each truss unit is exposed. Compared with the traditional method of directly placing special connectors on the bottom formwork, there are fewer exposed points, which facilitates later filling. At the same time, by setting two supports, the base plate contacts the bottom formwork through three support points: the supports and the nut. The base plate will not wobble, has good stability, and is conducive to improving assembly efficiency.

[0017] Compared with the prior art, the advantages of this invention are that by setting a movable snap-fit ​​device, which is detachably installed on the bottom formwork, the steel truss only needs to be connected to the movable snap-fit ​​device during assembly. This assembly process does not require the use of special machines to bend the lower chord steel bars, and workers can complete the assembly manually, making the assembly simpler and eliminating the risk of bending the lower chord steel bars, thus improving reliability. In addition, the steel truss, bottom formwork, and movable snap-fit ​​device do not need to be assembled in the factory and transported to the construction site. The steel truss, bottom formwork, and movable snap-fit ​​device can be transported to the construction site in bulk or transported separately to the corresponding floors for on-site assembly, which provides good flexibility and helps reduce transportation costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a partial structural diagram of the present invention. Figure 1 ; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a partial structural diagram of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 6 This is a partial structural diagram of the present invention. Figure 3 ; Figure 7 for Figure 6 Enlarged view of point B in the middle; Figure 7 This is a partial structural diagram of the present invention. Figure 4 ; Figure 8 This is a partial structural diagram of the present invention. Figure 5 ; Figure 9 This is a schematic diagram of the assembled structure of the present invention.

[0019] In the diagram: 1. Bottom formwork; 2. Truss unit; 3. Steel truss; 31. Top chord reinforcement; 32. Bottom chord reinforcement; 33. Web reinforcement; 4. Movable buckle device; 41. Fixed plate; 411. First slot; 4111. First channel; 4112. First waist-shaped hole; 412. Reinforcing rib; 413. Third waist-shaped hole; 414. Rivet; 415. Base plate; 4151. Second through hole; 4152. Nut; 4153. Support leg; 4154. Through hole; 416. Connecting plate; 42. Moving plate; 421. Second slot; 4211. Second channel; 4212. Second waist-shaped hole; 422. Push plate; 423. Locking plate; 424. Hook; 425. Limiting plate. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] Example 1: As shown in the figure, a detachable bottom formwork steel truss floor deck includes a bottom formwork 1. A truss unit 2 is detachably installed on the bottom formwork 1. The truss unit 2 consists of a steel truss 3 and a movable buckle device 4. The movable buckle device 4 is detachably installed on the bottom formwork 1. The steel truss 3 is connected to the bottom formwork 1 through the movable buckle device 4.

[0022] In this embodiment, the steel truss 3 includes one upper chord steel bar 31 and two lower chord steel bars 32. The lower chord steel bar 32 is fixedly connected to the upper chord steel bar 31 through the web steel bar 33. The movable buckle device 4 includes two fixed plates 41 perpendicular to the lower chord steel bar 32. The fixed plates 41 are detachably mounted on the bottom mold 1. The fixed plates 41 are provided with two first slots 411 and a movable plate 42 for opening or closing the first slots 411. The lower chord steel bar 32 is embedded in the first slots 411.

[0023] Example 2: A detachable bottom formwork steel truss floor deck includes a bottom formwork 1, on which three truss units 2 are detachably installed. Each truss unit 2 consists of a steel truss 3 and a movable buckle device 4. The movable buckle device 4 is detachably installed on the bottom formwork 1, and the steel truss 3 is connected to the bottom formwork 1 through the movable buckle device 4.

[0024] In this embodiment, the steel truss 3 includes one upper chord steel bar 31 and two lower chord steel bars 32. The lower chord steel bar 32 is fixedly connected to the upper chord steel bar 31 through the web steel bar 33. The movable buckle device 4 includes three fixed plates 41 perpendicular to the lower chord steel bar 32. The fixed plates 41 are detachably set on the bottom mold 1. The fixed plates 41 are provided with two first slots 411 and a movable plate 42 for opening or closing the first slots 411. The lower chord steel bar 32 is embedded in the first slots 411.

[0025] In this embodiment, a reinforcing rib 412 is provided on the fixed plate 41, and the reinforcing rib 412 is arranged around the first slot 411.

[0026] Example 3: The rest is the same as in Example 2, except that the first slot 411 includes a first channel 4111 and a first waist-shaped hole 4112 extending along the length of the fixed plate 41. The first waist-shaped hole 4112 is connected to the upper end face of the fixed plate 41 through the first channel 4111. The lower chord steel bar 32 is embedded in the first waist-shaped hole 4112. The movable plate 42 is used to open or close the first waist-shaped hole 4112.

[0027] In this embodiment, the moving plate 42 and the fixed plate 41 are horizontally slidably engaged. The moving plate 42 is provided with two second slots 421. The second slots 421 include a second channel 4211 corresponding to the first channel 4111 and a second waist-shaped hole 4212 extending along the length direction of the moving plate 42. The second waist-shaped hole 4212 is connected to the upper end surface of the moving plate 42 through the second channel 4211.

[0028] The steel truss 3 extends in the left-right direction, and the fixed plate 41 extends in the front-back direction. One end of the first channel 4111 is connected to the rear end of the first waist-shaped hole 4112. The simplified working process of the detachable bottom formwork steel truss floor slab disclosed in this embodiment is as follows: Initially, the first channel 4111 and the second channel 4211 overlap, and the first waist-shaped hole 4112 and the second waist-shaped hole 4212 partially overlap. The lower chord steel bar 32 can be inserted into the first waist-shaped hole 4112 through the first channel 4111. Then, the moving plate 42 is pushed forward to make the first channel 4111 and the second channel 4211 staggered, and the first waist-shaped hole 4112 is closed. The first waist-shaped hole 4112 and the second waist-shaped hole 4212 cooperate to lock the lower chord steel bar 32.

[0029] Example 4: The rest is the same as in Example 3, except that the diameter of the second waist-shaped hole 4212 is larger than that of the first waist-shaped hole 4112. When the lower chord steel bar 32 is inserted into the first waist-shaped hole 4112 after passing through the first channel 4111, the lower chord steel bar 32 abuts against the upper wall of the first waist-shaped hole 4112, and the upper wall of the first waist-shaped hole 4112 serves as the main stress point.

[0030] In this embodiment, a push plate 422 is provided on the rear end face of the movable plate 42. The push plate 422 is perpendicular to the movable plate 42. The operator can push the plate 42 forward through the push plate 422, which makes the operation more labor-saving.

[0031] In this embodiment, a retaining plate 423 is provided on the front end face of the moving plate 42. The retaining plate 423 is perpendicular to the moving plate 42 and extends toward the fixed plate 41. Initially, the retaining plate 423 abuts against the fixed plate 41, and the moving plate 42 has a certain bending deformation. When the moving plate 42 slides forward and closes the first waist-shaped hole 4112, the retaining plate 423 is fastened to the front end face of the fixed plate 41. At this time, the moving plate 42 returns to its original position. Since the retaining plate 423 is fastened to the front end face of the fixed plate 41, the moving plate 42 cannot slide backward, ensuring that the first retaining groove 411 will not be opened, and the reliability is good.

[0032] In this embodiment, the fixed plate 41 is provided with a third oblong hole 413 extending in the front-back direction and a rivet 414. After the rivet 414 passes through the third oblong hole 413, it is fixedly connected to the moving plate 42. The rivet 414 and the third oblong hole 413 slide in a front-back manner, thereby realizing the front-back sliding engagement of the moving plate 42 and the fixed plate 41.

[0033] Example 5: The rest is the same as in Example 3, except that the fixed plates 41 of adjacent truss units 2 are integrally connected, and the movable plates 42 of adjacent truss units 2 are integrally connected. The integral connection of the fixed plates 41 forms three horizontal bars perpendicular to the steel truss 3. The horizontal bars and the steel truss 3 cooperate to form a mesh reinforcement, which has better structural strength.

[0034] In this embodiment, the fixed plate 41 located at the edge of the bottom formwork 1 extends one centimeter beyond the bottom formwork 1, which facilitates the splicing of adjacent detachable bottom formwork steel truss floor slabs in the later stage. When multiple detachable bottom formwork steel truss floor slabs are spliced, the fixed plates 41 on adjacent bottom formwork 1 and located on the same straight line can be welded and fixed.

[0035] Example 6: The rest is the same as in Example 2, except that the movable plate 42 is rotatably mounted on the fixed plate 41. One end of the movable plate 42 is provided with a hook 424, which cooperates with a first slot 411 to form a first locking hole that restricts the movement of a lower chord steel bar 32. When the lower chord steel bar 32 is inserted into the first slot 411, rotating the movable plate 42 causes the hook 424 to close one of the first slots 411 and hook onto the lower chord steel bar 32. The hook 424 and the first slot 411 cooperate to lock the lower chord steel bar 32. Since the steel truss 3 is a whole, once one lower chord steel bar 32 is locked, the other lower chord steel bar 32 cannot disengage from the other first slot 411.

[0036] Example 7: The rest is the same as in Example 6, except that the moving plate 42 is located between the two first slots 411, and a limiting plate 425 is provided at the other end of the moving plate 42. The limiting plate 425 cooperates with the other first slot 411 to form a second locking hole that restricts the movement of the other lower chord reinforcing bar 32. The moving plate 42 can close one first slot 411 through the hook 424 and close the other first slot 411 through the limiting plate 425. One moving plate 42 can control the state of two first slots 411 simultaneously, which is stable and reliable.

[0037] Example 8: The rest is the same as in Example 6, except that the fixed plates 41 of adjacent truss units 2 are integrally connected. The integral connection of the fixed plates 41 forms three horizontal bars perpendicular to the steel truss 3. The horizontal bars and the steel truss 3 cooperate to form a mesh reinforcement, which has better structural strength.

[0038] Example 9: The rest is the same as in Example 2, except that the fixed plate 41 includes a base plate 415 and a connecting plate 416 that are bent and connected to each other. The base plate 415 is detachably mounted on the bottom mold 1, and the connecting plate 416 is provided with two first slots 411 and the connecting plate 416.

[0039] In this embodiment, the bottom mold 1 is provided with a first through hole (not shown in the figure), and the bottom plate 415 is provided with a second through hole 4151 and a nut 4152. The bolt passes through the first through hole and the second through hole 4151 and is screwed to the nut 4152.

[0040] In this embodiment, the nut 4152 is welded and fixed to the lower end face of the base plate 415. The base plate 415 is raised by the nut 4152, and a certain gap is left between the base plate 415 and the bottom formwork 1. When concrete is poured, the concrete can fill the gap and wrap the base plate 415. Only the lower end face of the nut 4152 of each truss unit 2 is exposed. Compared with the traditional method of directly placing the special connector on the bottom formwork 1, there are fewer exposed points, which is convenient for later filling.

[0041] Example 10: The rest is the same as Example 9, except that the bottom mold 1 has a first through hole, and the bottom plate 415 has a second through hole 4151, a nut 4152, and two supports 4153. The nut 4152 and the two supports 4153 are located on the lower end face of the bottom plate 415, and the two supports 4153 are distributed on both sides of the nut 4152. Bolts pass through the first through hole and the second through hole 4151 and are screwed to the nut 4152. The bottom plate 415 is raised by the nut 4152 and the supports 4153, leaving a certain gap between the bottom plate 415 and the bottom mold 1. When concrete is poured, the concrete can fill the gap and wrap the bottom plate 415. After the concrete solidifies and the bottom mold 1 is removed, only the lower end face of the nut 4152 and the supports 4153 are exposed in each truss unit 2. Compared with the traditional method of directly placing the special connectors on the bottom mold 1, there are fewer exposed points, which is convenient for later filling.

[0042] In this embodiment, the nut 4152 can be fixed by commonly available welding methods.

[0043] In this embodiment, a through hole 4154 is provided on the base plate 415, and concrete can fill the gap between the base plate 415 and the bottom mold 1 through the through hole 4154, which is beneficial to improving the filling effect.

[0044] The movable buckle device 4 used in the above embodiments is made of steel and contains no plastic components, which complies with green and environmental protection standards.

Claims

1. A detachable bottom formwork steel truss floor deck, comprising a bottom formwork, wherein at least one truss unit is detachably mounted on the bottom formwork, characterized in that... The truss unit consists of a steel truss and a movable fastening device. The movable fastening device is detachably mounted on the bottom formwork, and the steel truss is connected to the bottom formwork through the movable fastening device. The steel truss includes two lower chord steel bars, and the movable buckle device includes multiple fixed plates perpendicular to the lower chord steel bars. The fixed plates are detachably mounted on the bottom formwork. The fixed plates are provided with two first slots and a movable plate for opening or closing the first slots. The lower chord steel bars are embedded in the first slots. The first slot includes a first channel and a first waist-shaped hole extending along the length of the fixed plate. The first waist-shaped hole communicates with the upper end face of the fixed plate through the first channel. The lower chord steel bar is embedded in the first waist-shaped hole. The movable plate is used to open or close the first waist-shaped hole. The movable plate is rotatably mounted on the fixed plate, and a hook is provided at one end of the movable plate. The hook cooperates with a first slot to form a first locking hole that restricts the movement of a lower chord steel bar.

2. The removable bottom formwork steel truss floor deck slab according to claim 1, characterized in that... The movable plate and the fixed plate slide horizontally together. The movable plate is provided with two second slots. The second slot includes a second channel corresponding to the first channel and a second oblong hole extending along the length direction of the movable plate. The second oblong hole communicates with the upper end surface of the movable plate through the second channel.

3. A detachable bottom formwork steel truss floor deck according to claim 2, characterized in that... The fixed plates of adjacent truss units are integrally connected, and the movable plates of adjacent truss units are integrally connected.

4. A detachable bottom formwork steel truss floor deck slab according to claim 1, characterized in that... The movable plate is located between the two first slots, and a limiting plate is provided at the other end of the movable plate. The limiting plate cooperates with the other first slot to form a second locking hole that restricts the movement of the other lower chord steel bar.

5. A detachable bottom formwork steel truss floor deck slab according to claim 1 or 4, characterized in that... The fixed plates of adjacent truss units are integrally connected.

6. A detachable bottom formwork steel truss floor deck according to claim 1, characterized in that... The fixed plate includes a base plate and a connecting plate that are bent and connected to each other. The base plate is detachably mounted on the bottom mold, and the connecting plate is provided with two of the first slots.

7. A detachable bottom formwork steel truss floor deck according to claim 6, characterized in that... The bottom mold is provided with a first through hole, and the bottom plate is provided with a second through hole, a nut and two support legs. The nut and the two support legs are located on the lower end surface of the bottom plate, and the two support legs are distributed on both sides of the nut. The bolt passes through the first through hole and the second through hole and is screwed to the nut.

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