JPS6129803Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a link structure for a moving sheave in a general-purpose small pile driver that can be disassembled and assembled by oneself.

The compact general-purpose pile driver will be briefly described below with reference to FIG. 1, and then the improvements of the present invention will be described in detail.

FIG. 1 shows the working state of a general-purpose small pile driver, in which 1 is a leader, 2 is an elevation cylinder, and 3 is a stay. 4 is a catch hawk, and 5 is a leader fixed link. These are supported by the pile driver main body A,
and transported. 6 is a moving sheave according to the present invention. When being transported, the leader 1 is brought down and carried, and is made to stand on its own at the work site.

The present invention relates to a link mechanism for the movable sheave 6 in such a pile driver that can be disassembled and assembled by oneself. When operating a pile driver, the driver must check the movement of the wire rope while operating the pile driver. For this reason, a sheave 6 is installed on the catch hawk 4, but generally a movable sheave is often used due to the fleet angle with the drum. In the present invention, the sheave bracket to which the movable sheave is attached is transported while attached to the main body, and the wire rope hung on the sheave is wound up on a drum, so that it can be assembled and put into working condition without using an auxiliary crane or the like. The purpose of the present invention is to provide a link structure for a moving sheave that can

In FIG. 2, brackets 7 and 8 are attached to the upper part of the catch hawk 4, and links 10 and 11 are pivotally supported to the brackets through pins 9. At the top of the link 10 is a sheave shaft 1 that supports the sheave 6.
2 is fixed. The link 11 is fitted into the bearing portion 10a of the link 10 and is movable within the bearing portion 10a (FIG. 4). 14 is a pin that fixes the link 11 that has moved on the sheave shaft 12.

Reference numeral 15 designates a bracket provided at the bottom of the catch hawk 4, to which the lower end of the link 11 can be pinned during transportation. It goes without saying that the length of the link is set so that the sheave 6 supported by the sheave shaft 12 does not touch the upper surface of the catch hawk 4. Reference numeral 16 denotes a wire rope that runs from the drum 17 through the sheave 6 to the top sheave.

Now, with the above configuration, the fifth
As shown in the figure, remove pin 9 of link 11 and pin 15a.
4 (the side not shaded) and is held in that position by the pin 14. The wire rope 16 is still hung on the drum 17, sheave 6, and top sheave.

Next, when the leader 1 is made to stand on its own during work, the link 11 is slightly lifted while the wire rope 16 is wound around the drum 17. Then, the pin 15a becomes easy to remove, so place the pin 15a in the bracket 1.
Remove from 5. Furthermore, the wire rope 16 is wound around to lift the link 11 to the upper surface of the catch hawk 4. In this state, the pin 14 is removed, the link 11 is moved laterally within the bearing part 10a of the link 10, and it is fixed to the bracket 8 on the catch hawk 4 with the pin 9.
At the same time, the bearing section on the upper part of the link 10 is prevented from slipping by the pin 14. This completes the chevron-shaped support link.

As explained above, in the present invention, a pair of links forming a chevron shape are attached to the catch fork, and the sheave shaft is supported by these links, but when the shaft is being fed, the lower end of one link is removed from the catch fork.
Since this can be dropped into the bracket provided at the bottom of the catch hawk and fixed, there is no need for an auxiliary crane to attach the sheave block onto the catch hawk, as was the case in the past.

Moving the link with the wire rope hanging,
Since it is possible to do the drop-in process, work efficiency has been further improved.

When lowering the link, it is made to be able to slide within the bearing section at the upper part of one of the links, and the moving position can be maintained, so that the work is easy and safe transportation can be ensured.

[Brief explanation of the drawing]

Figure 1 is a front view of a small pile driver. Figure 2 is a detailed view of the area surrounding the catch hawk according to the present invention. FIG. 3 is a top view of FIG. 2. FIG. 4 is a detailed view of the section shown by the arrow in FIG. FIG. 5 is a detailed view of the same position as FIG. 2, particularly showing the state during transportation. FIG. 6 shows the state of the sheave shaft and its support portion during transportation (plan view). In the figure: A... Pile driver main body, 1... Leader, 2... Elevation cylinder, 3... Stay, 4...
Cattail Hawk, 5... Leader fixed link, 6...
...Moving sheave, 7, 8... Bracket, 9... Pin, 10, 11... Link, 10a... Bearing part,
12... Sheave shaft, 14... Pin, 15... Bracket, 15a... Pin, 16... Wire rope, 17... Drum.

Claims (1)

[Scope of utility model registration request] A pair of links 10 and 11 forming a chevron shape are attached to the catch fork 4, and the movable sheave shaft 12 is supported at the top of the triangle.
One of the links 11 is removably pinned to the bracket 8 attached to the upper part of the catch hawk 4, and its upper part can be slid and fixed in position within the bearing part 10a of the other link 10. A link structure for a movable sheave in a general-purpose small pile driver, characterized in that the link structure is configured such that it can be supported and fixed by falling into the lower part of a catch hawk 4 during transportation.