JP2015169059A - Suspension tool for panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspension tool for a panel capable of quickly and safely attaching-detaching a suspension tool, even in a large-sized panel of reaching several m in a height.SOLUTION: A suspension tool 1 for a panel locks the upper edge of the panel 5 from both side surfaces, and the suspension tool 1 for the panel is formed in a U shape of having an upper surface part 2 having a traction object part for suspending and a projection part 3 mutually opposed by extending downward from the upper surface part 2, and at least one projection part 3 has a hole capable of inserting a bolt 4 threadably attachable to a nut provided in the panel 5, and the hole is arranged in an attachable-detachable height of the bolt 4 from the panel 5 of standing without using a base.

Description

  As a method of constructing an above-ground or underground LNG tank, the present invention uses a panel material (steel liner plate, precast reinforced concrete segment, etc.) as an inner frame at a position to be an inner peripheral surface of a wall body, and a lifting machine such as a crane. The present invention relates to a panel lifting jig used when lifting and hanging work using the.

  In recent years, the demand for liquefied natural gas (hereinafter abbreviated as LNG) as a clean energy source is increasing, but the storage is mainly in the form of cylindrical tanks both underground and above ground. As this kind of tank, in order to simplify the work at the site and shorten the construction period, one using a precast segment pre-fabricated in the factory for the inner formwork of the side wall is known. Segments such as steel or steel-concrete composite structures are used. This segment can form a ring shape by combining a plurality of segment piece members, and one segment tends to be larger and heavier due to the need for high-speed construction. When such a segment is moved, it is lifted and moved by a lifting machine such as a crane.

  As described above, since this segment is used for the inner mold of the cylindrical side wall, the segment needs to be erected efficiently and accurately at a predetermined position. In consideration of the position of the center of gravity of the segment, it must be lifted so as to be substantially perpendicular to the bottom plate of the tank and the upper surface of the already installed segment. For this reason, a U-shaped jig that locks the upper edge of the segment provided with a towed portion for lifting on the upper surface from both side surfaces is used as the segment lifting jig. The segment can be lifted by engaging the towed portion with a hook provided at the tip of a wire of a lifting machine such as a crane.

However, in the case of a large segment with a height of several meters in particular, the hanging jig cannot be attached or detached with the segment standing without using a scaffold such as a work table. It is desirable to complete such work in an unstable state where the segments are not completely fixed as quickly as possible. In addition, each time a segment is installed, the work table or the like must be moved, and the work is performed on a scaffold such as the work table. Therefore, there is a problem from the viewpoint of safety.

The present invention has been made in view of the above-mentioned problems, and even for a large panel (segment or the like) having a height of several meters, the suspension for a panel in which a hanging jig can be quickly and safely attached and detached. The purpose is to provide ingredients.

In order to achieve the above object, a panel suspension jig according to the present invention is a panel suspension jig that locks the upper edge of the panel from both side surfaces, and the panel suspension jig is a lifting object. Formed in a U-shape having an upper surface portion having a pulling portion and a projecting portion extending downward from the upper surface portion and facing each other, at least one of the projecting portions can be screwed to a nut provided in the panel It has a hole through which a bolt can be inserted, and the hole is arranged at a height at which the bolt can be attached and detached from a panel that stands up without using a stand.

According to the panel suspension jig of the present invention, the hole through which the bolt that can be screwed into the nut provided in the panel is inserted at a height at which the bolt can be detached from the upright panel without using the stand. As a result, the bolt can be attached and detached quickly and safely.

The side view of the whole hanging jig for panels concerning this invention, AA, and BB sectional drawing. The segment lifting conceptual diagram using the panel lifting jig which concerns on this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1: shows the whole side view, AA, and BB sectional drawing of the hanging jig for panels which concerns on this invention. The panel hanging jig 1 includes an upper surface portion 2 having a locking portion and a protruding portion 3. The engaging portion and the projecting portion 3 are formed so as to sandwich both side surfaces of the upper end edge of the segment 5 so as to face each other below the upper surface portion. The upper surface portion 2 has a main web 2a fixed to the approximate center of the lower flange 2c and sub-webs 2b, 2b fixed to both ends by welding, and a lower flange is formed at a corner portion composed of the main web 2a and the lower flange 2c. Upper stiffeners 2d and 2d are fixed to the upper surface side of 2c, and lower stiffeners 2e and 2e are fixed to the lower surface side by welding, respectively. The main web 2a is provided with a towed hole 2f in consideration of the position of the center of gravity of the segment 5 so that a substantially vertical posture can be maintained when the segment 5 is lifted.

The protruding portion 3 is formed of a flat steel material 3c, a C-shaped steel material 3b shorter than the flat steel material 3c, and web materials 3a and 3a shorter than the C-shaped steel material 3b. The end of the flat steel material 3c is fixed to the lower surface of the lower flange 2c by welding substantially perpendicularly so that the back surface thereof is along the side surface of the segment. The web members 3a and 3a and the C-shaped steel member 3b are fixed by welding to the surface side of the flat steel member 3c, and each end is fixed to the lower surface of the lower flange 2c by welding substantially vertically.

As shown in FIGS. 1 (a) and 1 (b), a bolt 4 that can be screwed to a nut provided in a segment at a substantially central position at a position that does not interfere with the C-shaped steel material 3b of the flat steel material 3c of the projecting portion 3 is provided. Four bolt holes 3d as insertion holes are provided. The bolt hole 3d can remove the panel suspension jig 1 from the erected segment by removing each bolt 4 after installing the segment 5 at a predetermined position and without requiring a scaffold such as a work table. It is provided at a high height.

FIG. 2 shows a schematic diagram in which the segment 5 is lifted by a lifting machine such as a crane. As described above, the conventional hanging jig in which the shackles 6 and 6 that lock the wire 7 such as the crane or the like cannot be removed from the standing segment or the panel hanging jig 1 itself cannot be removed unless a scaffold such as a workbench is used. Unlike the case, each bolt 4 can be removed without the need for a base, so that the panel hanging jig 1 itself can be quickly and safely removed from the segment 5,

DESCRIPTION OF SYMBOLS 1 Panel suspension jig 2 Upper surface part 2a Main web 2b Subweb 2c Lower flange 2d Upper stiffener 2e Lower stiffener 2f Towed hole 3 Projection part 3a Web material 3b C-shaped steel material 3c Flat steel material 3d Bolt hole 4 Fixing bolt 5 Segment 6 Shackle 7 Wire

Claims (1)

A panel hanging jig that locks the upper edge of the panel from both sides,
The panel lifting jig is formed in a U-shape having an upper surface portion having a towed portion for lifting and a projecting portion extending downward from the upper surface portion and facing each other.
At least one of the projecting portions has a hole through which a bolt that can be screwed to a nut provided in the panel can be inserted,
The hole is disposed at a height at which the bolt can be detached from a panel raised without using a stand,
A panel hanging jig characterized by the above.

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