JP2000282413A - Launching machine with deflection eliminator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the efficiency of an erection operation, shorten a process, and reduce the number of jack up and down operations to assure safety by reducing, as low as possible, the adjustment of a deflection at the tip of a launching machine so as to simplify an equipment. SOLUTION: In a launching machine connected, through a connection groove 2, to the tip of a bridge beam G for bridging a bridge beam manufactured on a production stand on piers B apart from each other, a hinge part 8 is installed flexibly in the middle part of the launching machine. When an extension jack 9 is installed under a hinge part 8 and a deflection occurs in the launching machine, a rod 10 of the extension jack 9 is extended so as to raise the tip of the launching machine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand-rolling machine equipped with a bending eliminator for use in extruding a bridge girder in a method of erection and construction of a steel bridge girder.

[0002]

2. Description of the Related Art Conventionally, in a method of erection of a steel bridge girder, as shown in FIG. 4, a steel bridge girder G is pushed forward and erected on a pier B. The bridge girder G, which has been ground assembled (assembled in another space before completion) in units of several tens of meters, on a production table provided in
A temporary support device C (FIG. 5) as shown in FIG.
A bridge girder is placed on a sliding material D on a suitable support such as steel, and the bridge girder is pushed by pushing the bridge girder while sliding the bridge girder on the support.

Conventionally, the bending of the tip of the hand-rolling machine at the time of feeding and erection by such a hand-rolling machine has been carried out by jacking up the feeding yard and adjusting the mounting angle of the hand-rolling machine.

When the jack-up reaction force increases, the equipment becomes larger, the workability of installing and removing the equipment deteriorates, and it becomes difficult to ensure the safety of the work when jacking up and down. Also, regarding the adjustment of the mounting angle of the hand-rolling machine, when the angle is large, many problems occur in stress concentration at the mounting portion and shape management at the time of feeding.

[0005]

SUMMARY OF THE INVENTION The above-described hand-rolling machine A
In the erection work by the above, the adjustment of the deflection at the tip of the hand-rolling machine A is reduced as much as possible and the equipment is simplified, thereby improving the efficiency of the erection work, 2) shortening the process, and 3) jacking up and down. It is an object of the present invention to provide a hand-rolling machine that can reduce the operations such as operations and ensure safety.

[0006]

[MEANS FOR SOLVING THE PROBLEMS] In a hand-rolling machine connected by a connecting structure to a bridge girder tip for bridging a bridge girder made on a production stand on a pier which is spaced apart, a hinge portion is provided at an intermediate portion of the hand-rolling machine. The extension jack is provided at the lower part of the hinge part so that the tip of the hand tool can be lifted by the extension jack when the hand tool is bent.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be summarized as follows: a hand-rolling machine main body made of a truss structure or I-shaped steel, and a jack equipment provided at an intermediate portion of the hand-rolling machine main body for adjusting the deflection of the hand rolling machine. Has become.

FIG. 2 shows a normal hand-rolling machine A,
Above the bridge girder G is built. When the bridge girder G is completed, a box-shaped connecting structure 2 is fixed to the tip of the bridge girder with bolts or the like, and a truss structure (or H-shaped steel) hand-rolling machine A is connected thereto by bolting.

In the state shown in FIG. 2, the bridge girder G rests on a delivery device 3 provided at the lower end and a carriage 4 provided at the rear. As shown in FIG. 3, the delivery device 3 has a support 5 for the bridge girder G. The support 5 is sent forward by the jack device 6 and moves forward. At this time, the rear bogie 4 (FIG. 2) moves forward following the feed. Then, when fed by a predetermined distance, the lifting device 7 is raised to place and support the bridge girder G thereon. Thus, it is sent forward in the form of a scale insect.

However, if the bending of the hand-rolling machine A is large as shown in FIG. 1, it is necessary to adjust the bending. The present invention features this adjustable handroller. In FIG. 1, reference numeral 8 denotes a hinge provided at an intermediate portion of the hand-rolling machine A. Reference numeral 9 denotes an extension jack provided on the hinge portion 8. The extension jack 9 has a rod 10 (FIG. 1B),
When this is extended, the leading end of the hand-rolling machine A is lifted up and lifted around the hinge portion 8 so that the bending can be eliminated.

[0011] Thus, the tip end of the hand-rolling machine A is the pier B in front.
If the bridge girder is placed on the bridge girder, the delivery device 3 can be operated to sequentially move the bridge girder, and the bridge girder G can be bridged between the bridge girder B and the bridge girder B. Although not shown, hydraulic pressure for operating the delivery device 3 or the extension jack 9 is appropriately piped,
It shall be connected to a hydraulic device provided on the ground.

[0012]

(1) In the portion of the feeding device 3, the jack-up equipment in this portion can be omitted only by the feeding operation by the feeding device 3, so that the working process can be simplified. (2) Since the trouble of managing the shape of the hand-rolling machine A at the time of erection can be omitted, the working process can be simplified.

[Brief description of the drawings]

FIG. 1 shows a hand-rolling machine according to the present invention.

FIG. 2 is an ordinary hand-rolling machine.

FIG. 3 is a detailed view of a delivery device.

FIG. 4 shows a state at the time of crosslinking by a known hand-rolling machine.

FIG. 5 shows a support device on a pier.

[Explanation of symbols]

 Reference Signs List A Hand rolling machine B Bridge pier C Support device G Bridge girder 1 Production stand 2 Connecting structure 3 Feeding device 4 Dolly 5 Bearing 6 Jack device 7 Lifting device 8 Hinge 9 Extension jack 10 Rod

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[Procedure amendment]

[Submission date] April 6, 1999 (1999.4.6)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 4

FIG. 5

Claims (1)

[Claims] 1. A hand-rolling machine connected by a connecting structure to a tip of a bridge girder for bridging a bridge girder made on a production stand on a pier that is spaced apart, and a hinge portion is provided at an intermediate portion of the hand-rolling machine to bend. A hand with a bending eliminator, wherein an extension jack is provided at a lower portion of the hinge portion so that the tip of the hand tool can be lifted by the extension jack when the hand tool is bent. Total machine.