JP2595614Y2 - Push-up rack for large span structures - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push-up base for pushing up a large span structure such as a hangar of a large aircraft.

[0002]

2. Description of the Related Art A steel frame of a building having a truss structure with a roof like the above-mentioned hangar has been constructed by erecting a temporary support, providing a temporary fulcrum on the temporary support, and passing a beam to assemble the truss structure.

[0003]

However, assembling the steel frame of the roof of a large span structure having a width of 200 m, a depth of 100 m and a height of 10 m by the above-mentioned conventional method, for example, requires a lot of work at a high place. Extremely dangerous and workability is poor.

Accordingly, the present applicant first suspends a plurality of tension rods from a top beam provided on the top of a temporary pillar erected on a base, and separates the tension rods from each other by upper and lower nuts. To support the upper and lower reaction receiving pedestals, provide a hydraulic jack between the upper and lower reaction receiving pedestals, extend and contract the hydraulic jack, and push the structure supported by the reaction receiving pedestal with a scaleworm insect type. We proposed a push-up rack to be raised. According to the push-up gantry, the above-mentioned problem in the case of the conventional method is solved.

In the above push-up frame, the suspension point is horizontally moved and rotated by the bending deformation of the reaction force receiving table, and accordingly, the tension rod repeatedly bends and moves in a fixed direction, and the clearance between the rod and the receiving table is increased. A disadvantage arises in maintaining the verticality of the rod.

Accordingly, the present invention provides a push-up gantry that prevents a forced bending and movement to a tension rod due to horizontal movement and rotation of a suspension point due to bending deformation of a reaction force receiving base, and enables smooth push-up. It was done for the purpose of doing.

[0007]

According to the present invention, a plurality of tension rods (4) are suspended from a top beam (2) provided on the top of a temporary column (1) erected on a base (B). Set up
The tension rod (4) supports the upper and lower reaction force receiving pedestals (5A, 5B) at an interval by upper and lower nuts (6A, 6B). 5B) A hydraulic jack (7) is provided between them, and the hydraulic jack (7) is extended and contracted to push up a structure supported by the upper reaction force receiving stand (5A) by a tapeworm type, and a tension is applied to the push-up frame. In order to prevent lateral movement and forced bending of the rod (4), the upper and lower reaction force receiving bases (5A, 5B) and the upper and lower nuts (6A, 6B) are positioned between the upper and lower reaction bases (5A, 5B). 5
A, 5B) A washer (8A) having a convex spherical surface protruding downward with a neutral surface (AA) as a spherical core (P) is interposed.

[0008]

[Function] A push-up stand is placed on the main body support of the truss roof. The hydraulic jack is extended, and the truss roof is pushed up one stroke through the upper reaction force receiving base and the main body support. Then, the upper nut is rotated up to support and fix the upper reaction force receiving base. Next, the hydraulic jack is contracted, and the lower nut is rotated up to support and fix the lower reaction force receiving base.
This is repeated to push up the truss roof with the shading insect type. And by using a convex spherical washer with the cradle neutral surface as the spherical core between the nut and the reaction force cradle, the horizontal movement of the tension rod is eliminated, and the horizontal movement and rotation of the suspension point accompanying the bending deformation of the cradle. This prevents forcible bending and movement of the tension rod due to, and enables smooth push-up.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A push-up gantry is arranged on a main support of a truss roof to push up a truss roof. FIGS. 1 and 2 show the push-up gantry.

A pair of four temporary pillars 1 are erected in a cross shape on a base B, and a top beam 2 is provided at the top of the temporary pillar 1. Four tension rods 3 threaded from the top beam 2 are suspended via cushion jacks 4. An upper reaction force receiving base 5A and a lower reaction force receiving table 5B having a flat H-shape are inserted through the tension rod 3 so as to be vertically movable, and the upper nut 6A and the lower nut 6B screwed to the tension rod 3 are used to move the upper reaction force receiving base 5A and the lower nut 6B. The force receiving base 5A and the lower reaction force receiving base 5B are supported by the tension rod 3 at intervals. A hydraulic jack 7 is provided between the upper reaction receiving table 5A and the lower reaction receiving table 5B. In addition, 9 is a guide material, 10 is a main body support, 11 is a bracket fixed to the main body support, and 12 is a replacement beam.

Next, FIGS. 3 to 6 and FIGS. 7 to 1
The procedure for pushing up the truss roof according to 0 will be described.

The push-up gantry A is arranged on each of the main body columns 10 of the truss roof 13 (FIGS. 3 and 7).

The hydraulic jack 7 is extended and the upper reaction force receiving stand 5A
Then, the truss roof is pushed up one stroke through the main body support 10 (FIG. 4).

The upper nut 6A is rotated and raised to support and fix the upper receiving table 5A (FIG. 5).

The hydraulic jack 7 is contracted, and the lower nut 6B is
Is rotated upward to support and fix the lower reaction force receiving base 5B (FIG. 6).

This is repeated to push up the truss roof 13 by the tapeworm (from FIG. 7 to FIG. 8).

The upper reaction force receiving base 5A reaches the uppermost position, and in this state, a gap is provided between the lower chord member 14 of the truss roof 13 and the top beam 2 of the push-up gantry A, in which the replacement beam 12 can be inserted. The replacement beam 12 is inserted between the lower chord member 14 and the top beam 2 to temporarily receive the truss roof 13, and the first push-up is completed (FIG. 8).

The upper and lower reaction force receiving bases 5A and 5B are lowered to the lowest position, and the connecting column 15 is welded to the suspended main column 11 below the main column 10. Then, the hydraulic jack 7 is extended and contracted to push up the second and third times sequentially (FIGS. 9 and 10).

Finally, the connecting pillar 15 is connected to the base to complete the pillar, the truss roof 13 is supported, and the push-up gantry A is dismantled and removed.

In the push-up gantry described above, the suspension point undergoes horizontal movement and rotation due to bending deformation of the reaction force receiving pedestal. As a countermeasure for preventing repeated bending stress on the tension rod due to the horizontal movement and rotation, it is conceivable to interpose a washer between the reaction force receiving base and the nut.

When a flat washer is used as a washer, it is apparent that there is no effect on the inconvenience. FIG. 11 shows an example in which a concave spherical washer 8B is used between the reaction force receiving base 5 and the nut 6. In the figure, AA represents the neutral surface of the receiving table 5, P represents the spherical core of the concave spherical washer 8B, and h represents the height from the spherical core P to the neutral surface AA.

In the case where the concave spherical washer 8B is used, when the receiving base 5 is bent by the angle θ, the tension rod 3 is forcibly moved by the distance θh in the same direction as the spherical core of the concave spherical surface due to the constraint of the concave spherical surface. In addition, the same phenomenon occurs when the load is transferred to the upper reaction force receiving table, and the tension rod 3 repeatedly moves in a fixed direction by repeating the push-up, and the clearance between the rod 3 and the receiving table 5 and the verticality of the rod 3 are increased. Cannot be held.

FIG. 12 shows an embodiment of the present invention.
A convex spherical washer 8A projecting downward with the cradle neutral plane AA as the spherical core P is interposed between the cradle and the reaction force cradle 5. As a result, the lateral movement of the tension rod 3 is eliminated, and
The horizontal bending and rotation of the suspension point due to the bending deformation of the suspension prevents the bending and movement of the tension rod 3 to the tension rod 3.

[0024]

[Effect of the Invention] The present invention provides a push-up pedestal for pushing up a large span structure by simply interposing a convex spherical washer between the reaction force receiving pedestal and the nut with the pedestal neutral surface as a spherical core. With such a configuration, it is possible to prevent the tension rod from being forcibly bent and moved by the horizontal movement and rotation of the suspension point due to the bending deformation of the reaction force receiving base, thereby enabling a smooth push-up.

[Brief description of the drawings]

FIG. 1 is a front view of a push-up stand in which the present invention is implemented.

FIG. 2 is a plan view of the push-up gantry of FIG. 1;

FIG. 3 is a view showing a first step in elongating and contracting a hydraulic jack to raise a reaction force receiving base of a push-up gantry by a scaleworm.

FIG. 4 is a view showing a second step.

FIG. 5 is a view showing a third step.

FIG. 6 is a view showing a fourth step.

FIG. 7 is a first process diagram in which a large span structure is pushed up by a push-up base.

FIG. 8 is a second process diagram.

FIG. 9 is a third process diagram.

FIG. 10 is a fourth process diagram.

FIG. 11 is an explanatory diagram showing forcible bending and movement of a tension rod accompanying bending deformation of a receiving base when a concave spherical washer is interposed between a reaction force receiving base and a nut.

FIG. 12 is an explanatory view showing the case where a concave spherical washer is interposed between the reaction force receiving base and the nut.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Temporary pillar 2 ... Top beam 3 ... Tension rod 4 ... Cushion jack 5 ... Reaction force receiving stand 6 ... Nut 7 ... Hydraulic jack 8A ... Convex spherical washer 9 ... guide material 10 ... main body support 11 ... bracket 12 ... replacement beam 13 ... truss roof 14 ... lower chord material 15 ... joint support

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-59245 (JP, A) JP-B 60-27638 (JP, B2) JP-B 6-17635 (JP, B2) JP-B 51- 36527 (JP, B2) Patent 2547920 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04G 21/16 E04B 1/342 E04B 1/35

Claims (1)

(57) [Scope of request for utility model registration] 1. A plurality of tension rods (4) are suspended from a top beam (2) provided on the top of a temporary pillar (1) erected on a base (B), and the plurality of tension rods (4) are hung on the tension rods (4). The upper and lower reaction force receivers (5A, 5B) are supported at intervals by upper and lower nuts (6A, 6B), and a hydraulic jack (5A) is provided between the upper and lower reaction force receivers (5A, 5B). 7), a tension jack (7) is extended and contracted to push up a structure supported by an upper reaction force receiving stand (5A) in a scale-worm type, and a tension rod (4) is moved laterally. Between the upper and lower reaction bases (5A, 5B) and the upper and lower nuts (6A, 6B) to prevent the upper and lower reaction bases (5A, 5B) from being bent. Surface (AA) protrudes downward as spherical core (P) A push-up base for a large span structure, wherein a washer (8A) having a convex spherical surface is interposed.