Tail fixing structure of cantilever I-shaped steel

Abstract

The utility model discloses a tail fixing structure of cantilever I-shaped steel, compared with a mode of pre-embedding a U-shaped steel bar ring, the tail fixing structure of the cantilever I-shaped steel adopts a steel plate to manufacture a fixing plate, pre-embedding is not needed, the fixing plate can be fixed on a structural floor slab only through four expansion bolts, the pre-embedding step is omitted, the installation is more convenient, and the construction efficiency is improved. In addition, disassembly is very convenient, construction turnover can be achieved, the fixing plates can be used repeatedly, and high turnover performance and economical efficiency are achieved; the steel plate is adopted as the fixing plate, compared with a steel bar ring, the contact area between the steel plate and the I-shaped steel is larger, gaps are wedged through square wood columns, large friction force is achieved, and the steel plate is economical, practical, safer and more reliable.

Description

Technical Field

[0001] The utility model relates to the field of tail fixing of cantilever structures, in particular to a tail fixing structure of a cantilever I-beam. Background Art

[0002] Cantilever structure is one of the common structural forms in engineering structures, such as awnings, eaves, external balconies, and cantilevered corridors in construction projects. This structure is a cantilever structure formed by cantilevering beams or plates from the main structure.

[0003] During construction, unloading platforms are often constructed, often using cantilevered platforms. These platforms require cantilevered main beams, typically made of cantilevered I-beams. The tail of the cantilevered I-beams must be connected and securely fixed to the structural floor. Currently, the tail of the cantilevered I-beams is typically secured using pre-embedded U-shaped steel rings embedded in the structural floor, through which the I-beams are passed and fastened with bolts. However, this approach is inconvenient for installation and re-use when multiple uses are required in high-rise structures. Utility Model Content

[0004] The purpose of the utility model is to provide a tail fixing structure for a cantilever I-beam, so as to solve the technical problems that when fixing the tail of the cantilever I-beam, a method of using pre-buried steel bar rings is time-consuming and labor-intensive, inconvenient for installing and disassembling the cantilever I-beam, and causes material waste and poor turnover.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The utility model provides a tail fixing structure of a cantilevered I-beam, comprising a structural floor, an I-beam, a fixing plate, an expansion bolt, a first fastening block and a second fastening block; the tail of the I-beam is arranged on the upper end surface of the structural floor, and the end is cantilevered outward; a fixing plate is arranged on the tail of the I-beam for fixing the I-beam to the structural floor; the fixing plate comprises a U-shaped plate and a folded edge, the opening of the U-shaped plate is buckled downwardly on the I-beam, so that the two side plates of the U-shaped plate are tightly pressed against the ends of the upper flange plate and the lower flange plate of the I-beam; the two side plates of the U-shaped plate The end portion extends outward to form a folded edge, which is perpendicular to the side plate of the U-shaped plate and laid on the upper end surface of the structural floor; the folded edge is fixed to the structural floor by an expansion bolt, one end of the expansion bolt is arranged inside the structural floor, and the other end extends upward and passes through the folded edge; the first fastening block is arranged between the upper flange plate of the I-beam and the bottom plate of the U-shaped plate and is pressed against the upper end surface of the upper flange plate and the inner side surface of the bottom plate of the U-shaped plate; the second fastening block is arranged between the web plate of the I-beam and the side plate of the U-shaped plate and is pressed against the outer side surface of the web plate and the inner side surface of the side plate of the U-shaped plate.

[0007] Preferably, at least one stiffening plate is provided in the middle portion of the outer side surface of the side plate of the fixing plate.

[0008] Preferably, the stiffening plate is a right-angled triangle, one right-angled side of the stiffening plate is fitted on the outer side surface of the side plate of the U-shaped plate, and the other right-angled side is arranged on the upper end surface of the folded edge.

[0009] Preferably, the fixing plate and the stiffening plate are both made of steel plates, and the stiffening plate and the fixing plate are fixed by welding.

[0010] Preferably, at least two expansion bolts are provided on each side of the flange.

[0011] Preferably, the first fastening block and the second fastening block are both made of wooden beams.

[0012] Preferably, the lengths of the first fastening block and the second fastening block are both greater than the lengths of the side plates of the U-shaped plate.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1) The utility model provides a tail fixing structure for a cantilevered I-beam. Compared with the method of pre-embedded U-shaped steel ring, the utility model uses steel plates to make the fixing plate. No pre-embedding is required. Only four expansion bolts are needed to fix the fixing plate to the structural floor, eliminating the need for pre-embedding, making installation more convenient and improving construction efficiency. In addition, the utility model is also easy to disassemble, enabling construction turnover. The fixing plate can be used multiple times, and has strong turnover and economy.

[0015] 2) The utility model provides a tail fixing structure for a cantilevered I-beam. The fixing plate is made of a steel plate. Compared with the steel ring, the steel plate has a larger contact area with the I-beam. The gap is wedged with wooden beams, which has great friction. It is economical and practical, and also safer and more reliable.

[0016] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The main purpose and other advantages of the present invention can be achieved and obtained through the solutions specifically pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below with reference to the accompanying drawings.

[0018] Figure 1 It is a front sectional view of the present utility model.

[0019] Figure 2 It is a side view of the present utility model.

[0020] Figure numerals: 1-structural floor, 2-I-beam, 3-fixing plate, 31-U-shaped plate, 32-folded edge, 33-stiffening plate, 4-expansion bolt, 5-first fastening block, 6-second fastening block. DETAILED DESCRIPTION

[0021] The technical solutions of the present invention are described in detail below through examples. The following examples are merely exemplary and can only be used to explain and illustrate the technical solutions of the present invention, and cannot be interpreted as limiting the technical solutions of the present invention.

[0022] Reference Figure 1-2 The utility model provides a tail fixing structure of a cantilevered I-beam, comprising a structural floor 1, an I-beam 2, a fixing plate 3, an expansion bolt 4, a first fastening block 5 and a second fastening block 6; the tail of the I-beam 2 is arranged on the upper end surface of the structural floor 1, and the end is cantilevered outward; a fixing plate 3 is provided at the tail of the I-beam 2 for fixing the I-beam 2 to the structural floor 1; the fixing plate 3 comprises a U-shaped plate 31 and a folded edge 32, the opening of the U-shaped plate 31 is buckled downward on the I-beam 2, so that the two side plates of the U-shaped plate 31 are tightly pressed against the ends of the upper flange plate and the lower flange plate of the I-beam 2; the ends of the two side plates of the U-shaped plate 31 extend outward to form a folded edge 32, and the folded edge 32 is perpendicular to the side plates of the U-shaped plate 31 and laid on The upper end surface of the structural floor 1; the folding edge 32 is fixed to the structural floor 1 by an expansion bolt 4, one end of the expansion bolt 4 is arranged inside the structural floor 1, and the other end extends upward and passes through the folding edge 32, and at least two expansion bolts 4 are arranged on each side of the folding edge 32; the first fastening block 5 is arranged between the upper flange plate of the I-beam 2 and the bottom plate of the U-shaped plate 31 and is tightly pressed against the upper end surface of the upper flange plate and the inner side surface of the bottom plate of the U-shaped plate 31; the second fastening block 6 is arranged between the web of the I-beam 2 and the side plate of the U-shaped plate 31 and is tightly pressed against the outer side surface of the web and the inner side surface of the side plate of the U-shaped plate 31; the first fastening block 5 and the second fastening block 6 are both made of wooden beams, and the length of the first fastening block 5 and the second fastening block 6 are both greater than the length of the side plate of the U-shaped plate 31;

[0023] Furthermore, at least one stiffening plate 33 is provided in the middle of the outer side surface of the side plate of the fixed plate 3. The stiffening plate 33 is a right-angled triangle. One right-angled side of the stiffening plate 33 is fitted on the outer side surface of the side plate of the U-shaped plate 31, and the other right-angled side is provided on the upper end surface of the folded edge 32. The fixed plate 3 and the stiffening plate 33 are both made of steel plates, and the stiffening plate 33 and the fixed plate 3 are welded and fixed.

[0024] Furthermore, the working principle of the present invention is as follows: first, the fixing plate 3 is processed, holes are drilled on the folded edge 32 of the fixing plate 3 for inserting the expansion bolts 4, and the stiffening plate 33 is welded on the side of the fixing plate 3; then, the I-beam 2 is hoisted and placed on the upper end surface of the structural floor 1, and the fixing plate 3 is opened downward and buckled on the I-beam 2 so that the fixing plate 3 and the I-beam 2 are firmly connected, and the expansion bolts 4 are drilled downward through the reserved holes of the folded edge 32 so that the expansion bolts 4 are inserted under the structural floor 1. And use nuts to fasten the connection between the folded edge 32 and the structural floor 1; then use the first fastening block 5 and the second fastening block 6 to insert them into the gap between the I-beam 2 and the fixed plate 3 to increase the friction and contact tightness between the two to improve the firmness; after the cantilever unloading platform is used, it needs to be disassembled. At this time, remove the nuts on the fixed plate 3 and the fixed plate 3 can be removed. The fixed plate 3, the first fastening block 5, and the second fastening block 6 can all be used for the next installation, which has good turnover.

[0025] The above description is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A tail fixing structure for a cantilevered I-beam, characterized by: It comprises a structural floor (1), an I-steel (2), a fixing plate (3), an expansion bolt (4), a first fastening block (5) and a second fastening block (6); The tail of the I-beam (2) is arranged on the upper end surface of the structural floor (1), and the end is cantilevered outward; a fixing plate (3) is provided at the tail of the I-beam (2) for fixing the I-beam (2) to the structural floor (1); The fixing plate (3) includes a U-shaped plate (31) and a folding edge (32), the opening of the U-shaped plate (31) is buckled downward on the I-beam (2), so that the two side plates of the U-shaped plate (31) are tightly pressed against the ends of the upper flange plate and the lower flange plate of the I-beam (2); the ends of the two side plates of the U-shaped plate (31) extend outward to form a folding edge (32), and the folding edge (32) is perpendicular to the side plates of the U-shaped plate (31) and is laid on the upper end surface of the structural floor (1); the folding edge (32) is fixed to the structural floor (1) by an expansion bolt (4), one end of the expansion bolt (4) is set inside the structural floor (1), and the other end extends upward and passes through the folding edge (32); The first fastening block (5) is arranged between the upper flange plate of the I-beam (2) and the bottom plate of the U-shaped plate (31) and is pressed against the upper end surface of the upper flange plate and the inner side surface of the bottom plate of the U-shaped plate (31); the second fastening block (6) is arranged between the web plate of the I-beam (2) and the side plate of the U-shaped plate (31) and is pressed against the outer side surface of the web plate and the inner side surface of the side plate of the U-shaped plate (31).

2. The tail fixing structure of a cantilevered I-beam according to claim 1, characterized in that: At least one stiffening plate (33) is provided in the middle of the outer side surface of the side plate of the fixing plate (3).

3. The tail fixing structure of a cantilevered I-beam according to claim 2, characterized in that: The stiffening plate (33) is a right-angled triangle, one right-angled side of the stiffening plate (33) is arranged on the outer side surface of the side plate of the U-shaped plate (31), and the other right-angled side is arranged on the upper end surface of the folded edge (32).

4. The tail fixing structure of a cantilevered I-beam according to claim 3, characterized in that: The fixing plate (3) and the stiffening plate (33) are both made of steel plates, and the stiffening plate (33) and the fixing plate (3) are fixed by welding.

5. The tail fixing structure of a cantilevered I-beam according to claim 1, characterized in that: At least two expansion bolts (4) are provided on each side of the fold (32).

6. The tail fixing structure of a cantilevered I-beam according to claim 1, characterized in that: The first fastening block (5) and the second fastening block (6) are both made of wooden beams.

7. The tail fixing structure of a cantilevered I-beam according to claim 1, characterized in that: The lengths of the first fastening block (5) and the second fastening block (6) are both greater than the lengths of the side plates of the U-shaped plate (31).

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