JPS5972315A - Rising and falling device for leader mast - Google Patents

Abstract

PURPOSE:To quickly and safely bend a leader mast by a method in which an upper leader mast is rotatably connected to a lower leader mast attached to a supporting base, and a drive mechanism to raise or fall down the upper leader mast is provided. CONSTITUTION:When bending a leader mast A, an upper leader mast 2 is inclined about 45 deg. backwards at the shaft 5 as center when the piston lever 14 of the upper cylinder 8 is pulled in to the maximum extent. When the piston lever 17 of the lower cylinder 9 is then pulled in, a link 15 turns downwards with the upper leader mast 2 at the shaft 5 as the center, and the upper leader mast 2 is bent horizontally or beyond the angle and held under the condition. Even in narrow places where the fabrication of the conventional leader mast is impossible, the leader masts can be quickly and safely bent.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a league mast for various types of ground improvement and a league mast for a pile driver.

Conventional league bending devices developed for pile driving are generally small, so they cannot be used for work with large loads, and only 10 are used for small-scale, light-load work in narrow spaces. There is. Also, although there are some that can lift large loads, the disadvantage is that the three-point stay for fixing the league mast is extremely complicated and it takes time to assemble the stay.

The purpose of this invention is to eliminate the above-mentioned drawbacks, and is intended for use in pile driving league masts for vibration heavy loads for ground improvement and long heavy loads, and for passing over bridges with sky restrictions.
To provide a league mast folding device that is quick and safe and can be used in construction work in narrow spaces where conventional league masts cannot be assembled, and as a measure to prevent falls due to strong winds when work is stopped.

That is, the present invention consists of a lower league attached to a support base and an upper league attached to the lower league so as to be able to rise and fall freely, and a drive mechanism such as a hydraulic cylinder that allows the upper league to rise and fall freely is provided. Accordingly, there is provided a levying device for a leader for a penetrating machine, which allows the upper league to be easily undulated.

The details of this inventive device will now be explained with reference to the accompanying drawings.

In the figure, A is a league mast, 1 is a lower league mast, 2 is an upper league mast, and a bracket 3 at the rear of the upper end of the lower league mast 1 and a bracket 4 at the rear of the lower end of the upper league mast 2 are rotated by a shaft 5. It is connected so that it can move freely.

B is a support base for the lower leak mast, and in the illustrated example, the crane body 7 running on the endless track 6 serves as the support base B, or other platforms that cannot be self-propelled or a boat platform for offshore construction are used as the support base B. In some cases.

C is a drive mechanism for the upper league mast 2, and in the illustrated example, it is composed of a pair of left and right upper cylinders 8, a pair of left and right lower cylinders 9, and a link 13, and these are usually surface pressure cylinders.

The upper ends of each upper cylinder 8 are joined together by a connecting frame 10 as shown in FIG. 2, and this frame is rotatably attached to a bracket 12 at the middle of the rear part of the upper leak 2 by a shaft 11.

One end of the link 13 is rotatably housed in the shaft 5, and the other end is connected to a connecting frame 15 that integrally connects the ends of the piston rods 14 extending from the lower ends of the cylinders 8.
It is rotatably connected to the shaft 16 by a shaft 16.

Each lower cylinder 9 has its upper end connected to the coupling frame 1.
The cylinder 9 is mounted on both sides of the cylinder 9 so that it can rotate around the axis 16 and can also swing slightly in the inward and outward directions.
Spherical portion 19 at the lower end of the piston rod 17 extending from the lower end
is attached to the support arms 18 extending on both sides of the vehicle body 70 so as to be rotatable in any direction.

D is a penetrating machine, and the illustrated example shows a pipe lane hammer, but there is also a hanging wire 21 that is slidably engaged with the kite rail on the front side of the diesel hammer and connected to the upper end of this penetrating machine. is connected to the buffer 22. In the illustrated example, the buffer 22 is preferably an IJ-type.

After that, a sheave device 23 is installed at the upper end of this buffer 22.
It is configured to be guided downward and hoisted up by a hoisting machine provided on the vehicle body 7.

In the map, 26 is a hopper, and 27 is a hollow tube for sand pile construction fixed to the lower end of the hopper 26. If the penetrating machine I) is a rotary type, the hopper 26 will be circular.

This invention has the above-mentioned configuration, and the state shown by the solid line in FIG. 1 indicates that the work is in progress, and the piston rods 14 and 17 of each cylinder 8 and 9 are advanced, and the upper league mast 2 is vertically erected. .

To explain the situation in which this league mast is bent from the above state, first, together with the piston 2 of the upper cylinder 8, the shaft 5
The upper leak mast 2 is bent horizontally or below, as shown by the chain line in Figure 1.
This state is maintained 41. Also, when raising the leak mast 8, set it vertically by reversing the above procedure.

This invention is carried out by means of support base B as described in 2)
The lower league mast 1 of A is supported, and the upper league mast 2 is mounted on it so that it can be raised and lowered freely.The L part league mast 2 can be raised and lowered freely from vertical to horizontal or below by a drive mechanism C that is composed of a hydraulic cylinder or the like. Because it is designed to be used for passing over bridges with sky restrictions, in narrow places where conventional leak masts cannot be assembled, or to prevent falls due to strong winds, the raising and lowering mechanism is also simpler.
This has the effect of making the drive mechanism C smaller.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the device of the present invention, and FIG. 2 is a rear view of the same. 1...Lower league mast, 2-...Upper leak mast, 11...Shaft, 27...Hollow/! ;, A...Leak mast, B...Support stand, C...Drive mechanism, ■)...
Penetration machine. Patent No. 5'1' Applicant: Fudo Construction Co., Ltd. Agent: Kama 1) Sentence 2nd 1st Mll:s V 6

Claims (1)

[Claims] A league mast for ground improvement, etc. consists of a lower league mast attached to a support base and an upper league mast rotatably connected to the lower league mast, and is equipped with a drive mechanism to raise and lower the upper league mast. luffing equipment.