Portable demouldable steel bar truss floor support plate
By introducing a rigid support structure of support plates and connecting pieces into the portable demolded steel truss floor deck, combined with a detachable plastic base and snap-fit design, the problem of bottom formwork deflection during the pouring process is solved, achieving a flat wall surface and convenient disassembly and reuse of the formwork.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU XIANGGU CONSTR CO LTD
- Filing Date
- 2025-06-16
- Publication Date
- 2026-08-04
AI Technical Summary
Existing portable, demoldable steel truss floor decks are prone to sagging due to gravity during the pouring process, resulting in uneven wall surfaces and a lack of effective anti-sagging structures.
The anti-sag structure includes a support plate and connecting pieces, which are fixedly connected by expansion bolts and nuts to provide rigid support in the middle; the detachable structure uses a plastic base and clips to facilitate disassembly and leave it in the concrete.
It effectively prevents the bottom formwork from sagging after pouring, ensuring a flat and smooth wall surface, and enabling convenient disassembly and reuse of the bottom formwork.
Smart Images
Figure CN224591638U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steel truss floor decking technology, specifically a portable, demoldable steel truss floor decking. Background Technology
[0002] A portable, demoldable steel truss floor deck, with announcement number CN220868822U, includes a bottom formwork. An installation component is positioned above the bottom formwork. Both sides of the upper surface of the installation component have protruding snap-fit parts. Both sides of the upper surface of the bottom formwork have protruding platforms. Each of the two protruding snap-fit parts has a first through hole on its left and right sides, and each of the two protruding platforms has a second through hole on its right side. The inner walls of the first and second through holes are fixedly connected by locking bolts. This invention maintains the stability of the lower chord steel reinforcement between the protruding snap-fit parts and the protruding platforms by using the protruding snap-fit parts of the installation component and the protruding platforms on the bottom formwork. Simultaneously, the locking bolts fix the protruding snap-fit parts and the protruding platforms, increasing the overall stability of the device. Limiting springs are provided at both ends of the locking bolts to prevent loosening.
[0003] Because the template is long, the middle part of the horizontal plate will deflect under gravity after the concrete is poured. The above-mentioned device does not have a structure to prevent deflection. If the pouring surface is thick, it will cause deflection, resulting in the center of the poured wall bulging downward, which will affect the flatness of the wall. Therefore, a portable demolded steel truss floor deck is needed to meet people's needs. Utility Model Content
[0004] The purpose of this utility model is to provide a portable, demoldable steel truss floor deck to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a portable demolded steel truss floor deck, comprising a bottom formwork and a lower chord steel bar; an upper chord steel bar is installed above the lower chord steel bar, and a connecting bar is fixedly connected between the lower chord steel bar and the upper chord steel bar; the bottom of the bottom formwork is provided with an anti-sag structure, and the top of the bottom formwork is provided with a detachable structure; Preferably, the anti-sag structure includes a support plate and a connecting piece. The support plate is fixedly installed at the bottom of the bottom template. The support plate and the bottom template have the same third fixing hole. An expansion bolt is fixedly installed in the third fixing hole, and a nut is threaded onto the expansion bolt.
[0006] Preferably, the connecting piece and the support plate have the same fourth fixing hole, and a fourth fixing bolt is installed in the internal thread of the fourth fixing hole.
[0007] Preferably, the detachable structure includes a base, which is fixedly installed on the bottom template. The base and the bottom template have the same first fixing hole, and a first fixing bolt is threaded into the first fixing hole.
[0008] Preferably, a buckle is installed on the base, and the buckle and the base have the same second fixing hole, and a second fixing bolt is installed in the internal thread of the second fixing hole.
[0009] Preferably, the buckle has a buckle groove, and the lower chord steel bar is installed below the buckle groove.
[0010] Preferably, the base and the groove are made of plastic.
[0011] Compared with the prior art, the beneficial effects of this utility model are: (1) In this utility model, after the template is fixed, a connecting piece is installed on the support plate between two adjacent bottom templates. The two ends of the connecting piece are fixed in the fourth fixing holes of the two adjacent support plates by the fourth fixing bolts. At this time, the two support plates are connected by the connecting piece. The support plate and the connecting piece can provide rigid support for the middle of the bottom template, thereby avoiding the sinking of the bottom template due to weight after pouring, thus ensuring that the wall surface is flat and smooth after molding.
[0012] (2) In order to achieve convenient disassembly, during installation, the lower chord steel bar is clamped between the two bases, the buckle is placed on the base, and the lower chord steel bar is clamped below the buckle groove. The base and buckle are fixed by the second fixing bolt. At this time, the lower chord steel bar is fixed below the buckle. After pouring, the first fixing bolt is removed from the bottom of the bottom formwork using tools. After the first fixing bolt is removed, the bottom formwork can be separated from the base. The base, buckle and lower chord steel bar are all filled in the poured concrete. The bottom formwork is recycled and a new base is reinstalled for reuse. Attached Figure Description
[0013] Figure 1 This is a three-dimensional structural diagram of a portable, demoldable steel truss floor deck proposed in this utility model; Figure 2 This is a structural diagram of the connecting piece and fourth fixing bolt of a portable demolding steel truss floor slab proposed in this utility model. Figure 3 This is a structural diagram of the base and buckle structure of a portable, demoldable steel truss floor deck proposed in this utility model; Figure 4 This is a structural diagram of the first fixing hole and the first fixing bolt of a portable, demoldable steel truss floor slab proposed in this utility model. Figure 5This is a structural diagram of the expansion bolts and nuts for a portable, demoldable steel truss floor deck proposed in this utility model.
[0014] In the diagram: 1. Bottom template; 2. Anti-sag structure; 3. Detachable structure; 4. Top chord reinforcement; 5. Connecting reinforcement; 6. Bottom chord reinforcement; 20. Support plate; 21. Third fixing hole; 22. Expansion bolt; 23. Nut; 24. Connecting piece; 25. Fourth fixing hole; 26. Fourth fixing bolt; 30. Base; 31. Clip; 32. Clip groove; 33. First fixing hole; 34. First fixing bolt; 35. Second fixing hole; 36. Second fixing bolt. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] Example 1: Please refer to Figure 1-5 This utility model provides a technical solution: a portable demolded steel truss floor deck, including a bottom formwork 1 and a lower chord steel bar 6; in order to prevent the supporting structure from deflecting during pouring, an upper chord steel bar 4 is installed above the lower chord steel bar 6, and a connecting bar 5 is fixedly connected between the lower chord steel bar 6 and the upper chord steel bar 4. The bottom of the bottom formwork 1 is provided with an anti-deflection structure 2, and the top of the bottom formwork 1 is provided with a detachable structure 3. The anti-deflection structure 2 supports the middle part of the bottom formwork 1 to prevent deflection, and the detachable structure 3 allows the bottom formwork 1 to be disassembled after pouring. To prevent downward deflection, the anti-deflection structure 2 includes a support plate 20 and a connecting piece 24. The support plate 20 is fixedly installed at the bottom of the bottom formwork 1. Both the support plate 20 and the bottom formwork 1 have the same third fixing hole 21, in which an expansion bolt 22 is fixedly installed. A nut 23 is threaded onto the expansion bolt 22. The connecting piece 24 and the support plate 20 have the same fourth fixing hole 25, in which a fourth fixing bolt 26 is threaded. This is to ensure that the bottom formwork 1 does not deflect during pouring. Before pouring the concrete after the template is fixed, a connecting piece 24 is installed on the support plate 20 between two adjacent bottom templates 1. The two ends of the connecting piece 24 are fixed in the fourth fixing hole 25 of the two adjacent support plates 20 by the fourth fixing bolt 26. At this time, the two support plates 20 are connected by the connecting piece 24. The support plate 20 and the connecting piece 24 can provide rigid support for the middle of the bottom template 1, thereby avoiding the sinking of the top of the bottom template 1 due to the weight after pouring, thus ensuring that the wall surface is flat and smooth after molding.
[0017] Example 2: Figure 1-4 To achieve the function of the detachable bottom template 1, the detachable structure 3 includes a base 30, which is fixedly installed on the bottom template 1. The base 30 and the bottom template 1 share the same first fixing hole 33, with a first fixing bolt 34 threaded into the first fixing hole 33. A buckle 31 is installed on the base 30, and a second fixing hole 35 is opened on the buckle 31 and the base 30. A second fixing bolt 36 is threaded into the second fixing hole 35. A buckle groove 32 is formed on the buckle 31, and a lower chord steel bar 6 is installed below the buckle groove 32. The base 30 and the buckle groove 32 are made of plastic. In use, the base 30 is fixed to the bottom template 1 using the first fixing bolt 34. After all the bases 30 are fixed, the lower chord steel bar 6 is removed from the bottom template 1. The chord steel bar 6 is placed between the two bases 30, and then the buckle 31 is placed on top of the base 30, and the lower chord steel bar 6 is clamped under the buckle groove 32. The base 30 and the buckle 31 are fixed by the second fixing bolt 36, and the assembly is completed. After pouring, the first fixing bolt 34 is removed from below. After the first fixing bolt 34 is removed, the bottom formwork 1 can be separated from the base 30. After the base 30 is separated from the bottom formwork 1, the base 30, the buckle 31 and the lower chord steel bar 6 will remain in the poured concrete. The base 30 and the buckle 31 are made of plastic parts, which are easy to manufacture and have low cost. After demolding, there will be a first fixing hole 33 at the bottom of the base 30. It can be covered by applying putty. The other features are the same as in Example 1.
[0018] The working principle is as follows: During use, the base 30 is fixed to the bottom formwork 1 using the first fixing bolt 34. After all the bases 30 are fixed, the lower chord steel bar 6 is placed between two bases 30. Then, the clip 31 is placed above the base 30, and the lower chord steel bar 6 is clipped below the clip groove 32. The base 30 and clip 31 are then fixed using the second fixing bolt 36, completing the assembly. After pouring, the first fixing bolt 34 is removed from below. After removing the first fixing bolt 34, the bottom formwork 1 can be separated from the base 30. After separating the base 30 from the bottom formwork 1, the base 30, clip 31, and lower chord steel bar 6 will remain in the poured concrete. The base 30 and clip 31 are made of plastic for easy installation. The manufacturing process is relatively low-cost. After demolding, the base 30 will have a first fixing hole 33 at the bottom, which can be covered by applying putty. In order to ensure that the bottom template 1 will not sag during pouring, after fixing the template and before pouring, a connecting piece 24 is installed on the support plate 20 between two adjacent bottom templates 1. The two ends of the connecting piece 24 are fixed in the fourth fixing hole 25 of the two adjacent support plates 20 by the fourth fixing bolt 26. At this time, the two support plates 20 are connected by the connecting piece 24. The support plate 20 and the connecting piece 24 can provide rigid support for the middle of the bottom template 1, thereby avoiding sag caused by the weight of the bottom template 1 after pouring, thus ensuring that the wall surface is flat and smooth after molding.
[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A portable demouldable steel bar truss floor deck comprising a base formwork (1) and a lower chord steel bar (6); characterised in that: An upper chord steel bar (4) is installed above the lower chord steel bar (6), and a connecting bar (5) is fixedly connected between the lower chord steel bar (6) and the upper chord steel bar (4). The bottom of the bottom formwork (1) is provided with an anti-sag structure (2), and the top of the bottom formwork (1) is provided with a detachable structure (3). The anti-scraping structure (2) includes a support plate (20) and a connecting piece (24). The support plate (20) is fixedly installed at the bottom of the bottom template (1). The support plate (20) and the bottom template (1) have the same third fixing hole (21). An expansion bolt (22) is fixedly installed in the third fixing hole (21). A nut (23) is threaded onto the expansion bolt (22).
2. A portable demouldable steel trussed floor deck according to claim 1, characterised in that: The connecting piece (24) and the support plate (20) have the same fourth fixing hole (25), and the fourth fixing bolt (26) is installed in the internal thread of the fourth fixing hole (25).
3. A portable demouldable steel trussed floor deck according to claim 1 characterised in that: The detachable structure (3) includes a base (30), which is fixedly installed on the bottom template (1). The base (30) and the bottom template (1) have the same first fixing hole (33), and a first fixing bolt (34) is installed in the internal thread of the first fixing hole (33).
4. A portable demouldable steel trussed floor deck according to claim 3, characterised in that: A buckle (31) is installed on the base (30), and the buckle (31) and the base (30) have the same second fixing hole (35). A second fixing bolt (36) is installed in the internal thread of the second fixing hole (35).
5. A portable demouldable steel trussed floor deck according to claim 4, characterised in that: The buckle (31) has a buckle groove (32), and the lower chord steel bar (6) is installed below the buckle groove (32).
6. A portable demouldable steel trussed floor deck according to claim 5, characterised in that: The base (30) and the groove (32) are made of plastic.