JPH0734669A - Fitting structure for hanging bracket and disassembling method - Google Patents

Abstract

PURPOSE:To particularly safely and efficiently disassemble and remove a hanging bracket and provide the fitting structure thereof which supports as a lifting tool guide rails of an overhead traveling crane used for hanging steel skeleton members, exterior wall panel PC plates and other materials, in a construction work such as a highrise building. CONSTITUTION:The upper and lower parts of a vertical member 4a in a hanging bracket 4 having a triangular side form are fitted to the outerside face in the steel skeleton structure 20 at the uppermost floor as a detachable constitution. And further, the hanging bracket is supported rotatably like a hinge at the upper chord member 20A of the steel skeleton structure 20 through a freely detachable connection pin, in the upper end of the vertical member 4a. When disasembling and removing it, the bracket is turned over to the steel skeleton side, taking the connection pin for the rotary center. After that, it is disasembled on a working floor 24 prepared on the steel skeleton structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for so-called hoisting, which supports a guide rail of an overhead traveling crane used for suspending steel frame members, outer wall panels, PC boards and other materials in construction work such as high-rise buildings. The present invention relates to a mounting structure of a protrusion bracket as a jig of and a disassembling method thereof.

[0002]

2. Description of the Related Art Commonly known as a construction method for high-rise buildings,
A construction method called a jack-up or lift-up construction method is known. The characteristic of this construction method is that, as shown in FIG. 8, first, the steel frame structure 10 which is the center of the building to be constructed is assembled to the preceding height, and then the steel frame structure 10 corresponding to the top floor is assembled. The structure 20 is assembled through a jack-up device, and the overhead traveling type crane 30 is provided on the lower surface of the steel frame structure 20. The crane 30 is used to support the pillar members, beams and floor plates of the lower floors, Further, it is a construction method in which materials such as outer wall materials are suspended, and assembly of the lower floors and jacking up of the steel frame structure 20 on the uppermost floor are alternately repeated to assemble the upper floors in order. The merit of the construction method is that the construction period can be significantly shortened as compared with the conventional construction method.

[0003]

By the way, when this construction method is adopted, it is necessary to dispose the overhead traveling type crane 30 on the lower surface of the steel frame structure 20 on the uppermost floor. Moreover, since this overhead traveling crane 30 is for suspending outer wall members and other materials from the outside of the building in the process of being constructed, it is not necessary to explain it. Therefore, as shown in FIG. A protrusion bracket 40 is previously attached to the outside of the case 20 as a jig for lifting, and the guide rail 50 of the overhead traveling crane 30 is extended by using the protrusion bracket 40, and the hanging position is a building. It can be taken outside.

However, the protrusion bracket 40 is
At the end of construction work, it must be dismantled and removed.
Therefore, conventionally, a crane and a suspension scaffold are separately provided to perform the dismantling work, and the dismantling and removing work is performed. However, dismantling work is high. Moreover, since the work involves gas cutting work and the like, a large-scale temporary facility is required for curing the sparks generated during cutting and ensuring the safety of workers. As a result, it was pointed out that there was a problem that the merit of the construction method was reduced, which was regarded as a technical issue.
The present invention has been developed for the purpose of solving the above problems and providing a mounting structure for a pop-out bracket that enables safe and efficient disassembly of the pop-out bracket, and a disassembly method thereof. It is a thing.

[0005]

In order to achieve the above object, therefore, in the present invention, a lifting bracket for lifting, which is attached to the side surface of the steel frame structure corresponding to the uppermost floor, is attached with the following structure. I did it.

First, the upper and lower parts of a vertical member of a protruding bracket having a side surface of a triangular shape or a quadrangular shape are fastened and fixed to the outer surface of the steel frame structure on the uppermost floor with bolts so as to be detachable. Installed as. Further, the upper end of the vertical member of the ejection bracket is attached to the upper chord member of the steel frame via a connecting pin which can be freely inserted and removed. In other words, it was pivotally connected with a hinge form.

Next, as the disassembling method, the following procedure was adopted. First, a temporary post having a wire guide roller was installed on the member of the ejection bracket. On the other hand, a winch was installed near the center of the work floor provided on the steel frame structure on the top floor. Then, the winding wire of the winch was locked to the tip of the horizontal member of the ejection bracket via the wire guide roller of the temporary post. In the locked state, the vertical member of the ejection bracket, which was fastened and fixed to the outer side of the steel frame structure via bolts, was removed from the steel frame structure side by loosening the bolts. In other words, separated. Then, the winch is actuated, and the ejection bracket itself is constructed with the connecting pin connecting the upper end of the vertical member of the ejection bracket and the upper portion of the steel frame with a hinge as a fulcrum. It was turned over to the side and slowly turned over to the work floor on the steel structure. Then, the connecting pin is pulled out, the coupling between the ejection bracket and the steel frame structure is released, and at the same time, it is dismantled on the work floor.

[0008]

As described above, the mounting structure and the disassembling method of the ejection bracket according to the present invention are such that the ejection bracket itself is detachably attached to the steel frame structure side by the bolt fastening type and the upper end portion Has a structure in which it is connected to the steel frame side via a connecting pin in a hinge form, so that it is easy to attach the ejection bracket itself to the steel frame side of the top floor in advance. Moreover, since the dismantling and removing work after use, that is, at the end of the construction work can be performed on the work floor on the steel frame structure by reversing with the connecting pin as a fulcrum, it is safe and dismantling work. There is no longer any need for special temporary scaffolding, etc.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction and operation of the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 is a side view of the ejection bracket 4 attached to the outer surface of the steel frame structure 20 corresponding to the uppermost floor. As means for detachably attaching the ejection bracket 4 to the side surface of the steel frame structure 20, the upper end of the vertical member 4a of the ejection bracket 4 is an upper chord member 20A constituting the steel frame structure 20.
21a through the gusset plate 21 to the end of the bolt 21a
Similarly, the lower end portion of the vertical member 4a was fixed to the end portion of the lower chord member 20B constituting the steel frame structure 20 by the bolt 21a via the gusset plate 21 in the same manner.

In the embodiment, the protrusion bracket 4 is a bracket 4 having a triangular side surface.
At the upper end of the vertical member 4a, the steel frame structure 2 is
A steel material 20a having the same cross-sectional shape as that of the upper chord member 20A of 0 is attached, and this steel material 20a is fixed to the end surface of the upper chord member 20A, that is, the left end surface in FIG. . Also vertical member 4
As a means for attaching the lower end of a to the lower chord member 20B of the steel frame structure 20, the horizontal member 4b of the ejection bracket 1 is used.
The structure itself is made of a steel material having the same cross-sectional shape as the lower chord member 20B of the steel frame structure 20, both end faces are abutted, and the bolt 21 is inserted through the gusset plate 21 as described above.
The fastening and fixing method according to a is adopted.

FIG. 2 is a perspective view showing a structure of a connecting portion for connecting the upper end portion of the vertical member 4a of the protruding bracket 4 to the upper portion of the steel frame structure 20 through a connecting pin 1. The joint is made of a so-called hinge structure.

3 and 7 show a work procedure for dismantling and removing the ejection bracket 4 attached in the above manner after the construction work is completed. First, FIG.
Installs the temporary post 3 having the wire guide roller 2 on the diagonal member 4c of the ejection bracket 4, while
A winch 22 is installed on the side of the steel frame structure 20,
The tip of the winding wire 22a of the winch 22 is
The figure shows a state in which the horizontal member 4b of the ejection bracket 4 is engaged with the tip end portion (left side in the drawing) via the guide wire roller 2.

FIG. 4 shows that the release bracket 4 is unlocked from the side surface of the steel frame structure 20, that is, the bolt 21a and the gusset plate 21 are removed, both are separated, and then the winch 22 is actuated. The state which raised the raising bracket 4 with the connecting pin 1 as a fulcrum is shown. In the embodiment, for safety work, the protruding bracket 4 is raised up to about 90 ° without being inverted to the steel frame 20 side at a stretch, and the diagonal member 4c of the protruding bracket 4 and the steel frame structure 4c are raised. Upper string member 20 of case 20
A temporary support 5 shown in FIG. 4 was hung between A and A.

In this state, as shown in FIG. 5, another winch 2 which has been installed on the side of the steel frame structure 20 in advance.
The tip of the wire 23a of No. 3 was locked to the horizontal member 4b side of the ejection bracket 4 via the lower chord member B side of the steel frame structure 20 as shown by an imaginary line. That is, when the ejection bracket 4 is turned over to the steel frame 20 side with the connecting pin 1 as a fulcrum, the ejection bracket 4 itself slowly and safely flips over the work floor 24 of the steel frame 20. The winch 23 is used for control.

FIG. 6 shows that when the winch 23 for controlling the sudden fall of the pop-out bracket 4 and the winch 22 for the reversing work are balanced, and further fall to the steel frame structure 20 side. The temporary post 3 having the wire guide roller 2 installed on the diagonal member 4c of the ejection bracket 4 hits the steel frame structure 20 as illustrated. Therefore, in order to remove the temporary post 3, the operation of the winches 22 and 23 is temporarily stopped in that state. That is, the temporary post 3 is removed in this state. Reference numeral 6 is a temporary receiving support for preventing the bracket 4 from falling over during the removal work.

In FIG. 7, after the temporary post 3 is removed as described with reference to FIG. 6, the ejection bracket 4 is completely overturned on the steel frame structure 20 so that the ejection bracket 4 and the steel frame structure are completely collapsed. It shows a state in which the connecting pin 1 that has been connected to the 20 side is pulled out.

As described above, according to the procedure shown in FIGS. 3 to 7,
When the protruding bracket 4 is laid down on the steel frame 20 and the two are disconnected from each other, the work floor 24 on the steel frame 20 is used to dismantle the protruding bracket 4 itself. I'll do it. As a result, the dismantling work can proceed extremely safely and efficiently.

[0018]

As described above, the mounting structure and the disassembling method of the pop-out bracket according to the present invention can be mounted on the steel frame structure corresponding to the uppermost floor by bolts and connecting pins. Since it is attached with a structural type, it is extremely easy to attach the protrusion bracket itself to the steel frame side in advance, that is, at a low place. Then, when the assembly work of the upper floors is completed and it is dismantled and removed at a height of 100 meters or more, it can be inverted by using only two winches, so it is very safe, The dismantling work can be developed. As seen in the conventional dismantling and removing work, it is not necessary to temporarily prepare further temporary scaffolding and safety curing equipment for the purpose of only the dismantling and removing work.

[Brief description of drawings]

FIG. 1 is a side view showing a mounting structure of a protruding bracket on a side surface of a steel frame structure corresponding to a top floor.

FIG. 2 is a perspective view showing a structure of a joint portion in which a top portion of a pop-out bracket is joined to a steel frame structure side with a connecting pin in a hinge form.

[Fig. 3] A temporary post having a wire guide roller is installed on the diagonal member of the ejection bracket, a winch is installed on the steel frame side, and the tip of the take-up wire is locked to the ejection bracket side. It is the made side view.

FIG. 4 is a side view in which the fastening fixing to the steel frame structure of the pop-out bracket is cut off and the winch is raised and raised.

FIG. 5 is a side view in which a winch is installed for slowly inverting the upright protruding bracket to the steel frame side.

FIG. 6 is a side view showing the middle of the reversing operation of the ejection bracket to remove the temporary post.

FIG. 7 is a side view showing a state where the pop-out bracket is turned over on a steel frame structure.

FIG. 8 is an explanatory diagram of a method called a jack-up or lift-up method.

[Explanation of symbols]

 1 ... Connection pin 2 ... Wire guide roller 3 ... Temporary post 4 ... Pop-out bracket 4a ... Vertical member of the pop-out bracket 4b ... Horizontal member 4c ... Diagonal member 5, 6 ... Temporary member Receiving support 20 …… Steel frame structure (top floor of building) 20A …… Upper chord member 20B …… Lower chord member 21 …… Gazette plate 21a …… Tightening bolts 22,23 …… Winches 22a, 23a …… Wire 24… … Work floor

Claims (2)

[Claims] 1. A vertical member of a protruding bracket having a side surface of a triangle or a quadrangle, which is detachably fastened and fixed to an outer surface of a steel frame structure on the uppermost floor, and the vertical member of the protruding bracket. An upper end portion of the spring bracket is pivotally connected to an upper portion of the steel frame structure via a connecting pin, to attach the ejection bracket. 2. A vertical member of a protrusion bracket having a side surface of a triangle or a quadrangle, etc., is detachably fastened and fixed to the outer surface of the uppermost steel frame structure, and further,
An upper end portion of the vertical member of the ejection bracket is a disassembling method of the ejection bracket in which the upper end portion of the vertical member is pivotally connected to an upper portion of the steel frame structure through a connecting pin, and (1) the ejection bracket Installing a temporary post having a wire guide roller on the member of (2), and (2) installing a winch near the center of the work floor provided on the steel structure of the uppermost floor, and winding the winch. Locking the wire to the tip of the horizontal member of the ejection bracket via the wire guide roller; and (3) releasing the fastening fixation of the vertical member of the ejection bracket to the outer surface of the steel frame structure. And (4) slowly inverting the winch bracket by activating the winch to the side of the steel frame structure with the connecting pin as a fulcrum, and (5) the flipped kickout bracket. With withdrawn connecting pins, step a, disassembling method of the blade out bracket consists to dismantle the blade out bracket in working floor on steel 構格.