JPS5810637B2 - Centering of heavy objects. Installation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for centering and attaching an attachment to an object, for example, a method for centering and attaching a heavy object in assembly work such as a large diesel engine easily, quickly and reliably. It is.

Traditionally, when assembling large diesel engines,
As shown in Figure 1, crane F is attached to mounting surface B of column A.
Place the transported guide plate D in contact with the column, screw the mounting bolt G inserted through the mounting hole C into the column into the mounting screw hole E of the guide plate D, temporarily mount the guide plate D, and lift the guide plate D with a crane. While hanging from F, stretch the piano wire (not shown) and center it, then loosen the mounting bolt G and attach it to the mounting surface B.
Attach a shim (not shown) to the shim, make fine adjustments, adjust the amount of descent of the guide plate D using a crane, and reamer.
Bolt holes H and I were reamed, and reamed bolts (not shown) were inserted and tightened.

However, the guide plate D is a heavy object and must be worked on while hanging from the crane F for a long time, so the crane has to be fixed at the guide plate mounting position, making it unnecessary to use a crane. This has the drawback of interfering with other tasks and creating a lot of waiting time.

The present invention aims to eliminate the above-mentioned drawbacks, and provides an adjustment pin shaft part having an adjustment shaft part having a substantially vertical moon-shaped cross section with a part of the circumference removed, at an eccentric position between the head and the shaft part. is loaded, and a mounting bolt is used in which the amount of protrusion of the shaft rod of the adjustment pin from the shaft portion is varied by the rotation of the adjustment pin, and the mounting bolt is transported by a crane and brought into contact with the object to be mounted. is temporarily fixed to the object to be mounted using the mounting bolt while suspended by a crane, and then the crane is released and the adjustment pin, which is eccentrically fitted into the shaft of the mounting bolt, is rotated to mount the object to the object to be mounted. A heavy object configured to finely adjust the position of the object to be attached by moving the axis of the mounting bolt in any direction up, down, left or right, and fixing the object to the object using a fixing port. This objective is achieved by providing a method for centering and mounting, which allows centering to be performed without using a crane after temporarily attaching the object to the object with the mounting bolt. By simply turning an adjustment pin mounted eccentrically on the handle, fine adjustment in the downward and left-right directions can be easily, quickly and reliably made.

An embodiment of the present invention will be described below based on the drawings.

In Figure 2, 1 is a stationary column, 2 is a column 1
A plurality of guide plates 3 are provided in the column 1 and pass through the guide plate mounting surface 1A.

4 is a single bolt hole that passes through the guide notebook 2,
A plurality of reamer bolt holes 3 are provided corresponding to the reamer bolt holes 3.

Numerous mounting bolt holes 1C are provided below and on the left and right sides of the reamer bolt hole 3, and on the other hand, the guide plate 2 has bolt mounting screw holes 2 at positions corresponding to the mounting bolt holes 1C.
A is provided, and the mounting bolt 5 is screwed into the mounting bolt 5.

The mounting bolt 5 used in the method for centering and mounting heavy objects of the present invention consists of a hexagonal head 5A, a shaft portion 5B, and a threaded portion 5C with a thread carved thereon, into which an adjustment pin 8 (described later) is fitted. has been done.

The mounting bolt 5 is inserted from the outside 1B of the column 1, the shaft portion 5B is inserted through the bolt hole 1C, and the threaded portion 5C is screwed into the screw hole 2A of the guide plate 2.

Further, a through hole 6 having an axis Y is bored in the head 5A at a position slightly eccentrically downward from the axis X of the mounting bolt 5.

This through hole 6 penetrates through the head 5A and reaches the end of the shaft portion 5B (the beginning of cutting of the threaded portion 5C).
A notched recessed portion 7 is formed by cutting out the outer circumferential portion of the eccentric side.

Reference numeral 8 denotes an adjustment pin, which consists of a hexagonal head 8A and a shaft rod 8B.

The shaft rod 8B consists of a head 8C with a circular cross section and an adjustment shaft 8D with a partially cut out substantially vertical moon-shaped cross section, and the length of the shaft 8C is equal to the height of the head 5A of the mounting bolt 50.

The adjustment shaft portion 8D is a portion of the shaft rod 8B excluding the shaft portion 8C, and has a length corresponding to at least the width of the column 10, and is approximately equal to the length of the shaft portion 5B of the mounting bolt 5.

Further, the outer circumference of the half of the adjustment shaft portion 8D centered on the axis is as follows:
The radius is made smaller than the other half radius, and there is a step H with respect to the shaft portion 8C, and the cross-sectional shape is formed into a substantially vertical moon shape, and is adapted to move in and out at the notch recessed portion 7.

To explain the working method of the present invention in more detail, first, the guide plate 2 carried by a crane is brought into contact with the vertical mounting surface 1A of the fixed column 1, and the mounting bolt hole 1C
The mounting bolt 5 fitted with the adjustment pin 8 is inserted into the guide plate 2, and the threaded portion 5C is screwed into the threaded hole 2A of the guide plate 2 for temporary fixation.

At this time, attach the adjustment shaft part 8D of the adjustment pin 8 to the bolt hole 1C.
It is provided so that a gap S is formed above the shaft portion 5B of the mounting bolt 5 so as to make contact with the lower surface 1C' of the mounting bolt 5.

Next, a piano wire or the like is stretched to perform centering, and the positions of the column 1 and the guide plate 2 are adjusted.

That is, the mounting bolt 5 is slightly loosened and the hexagonal head 3A of the adjustment pin 8 is rotated.

The shaft portion 8C of the adjustment pin 8 slides in contact with and rotates within the through hole 6 of the head 5A of the mounting bolt 50, so that the shaft portion 8C and the adjustment shaft portion 8D move upward, downward, leftward, etc. The mounting bolt 5 is moved to the right, eventually changing the position of the guide plate 2 relative to the column 1 and allowing fine adjustment.

That is, simply by rotating the adjustment pin 8 to the left or right, the guide plate 2 can be freely moved in any direction up and down or left and right.

However, if centering and fine adjustment are possible, screw the fixing bolt 12 into the fixing bolt hole 10.11 other than the mounting bolt 5,
After tightening, the reamer is passed through the predetermined reamer bolt holes 3 and 4, and a reamer bolt (not shown) is inserted and fastened.

The mounting bolt 5 may be tightened as is, or may be replaced with a fixing bolt.

As described above, according to the heavy object centering and mounting method of the present invention,
For example, when installing a heavy object such as a guide plate on the mounting surface of a large diesel engine column, there is no need to use a crane for a long time, so the crane can be used for other tasks that require a crane, and the crane can be used for other tasks. This saves time and allows work to be done more efficiently, and it also allows for much smaller adjustments to be made compared to the conventional method of raising and lowering the attachment to the object while it is suspended by a crane. Therefore, the work can be done easily and reliably, and the work time can be significantly shortened, among other remarkable effects.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the conventional working method, Fig. 2 is a cutaway side view for explaining the present invention in detail, Fig. 3 is a front view of the mounting bolt used in the present invention, and Fig. 4 is a Side view of Figure 3,
FIG. 5 is a front view of the adjustment pin, FIG. 6 is a view taken along the line E--E in FIG. 5, and FIG. 7 is an explanatory diagram of the fine adjustment operation in the working method of the present invention. 1... object to be attached, 2... object to be attached, 5.
...Mounting bolt, 5A...Head, 5B.
...Shaft part, 5C...Thread part, 6...
...Through hole, 7...Notch recess, 8...
・Adjustment pin, 8A...Hexagonal head, 8B...
...Shaft rod, 8C...Shaft part, 8D...Adjustment shaft part, 10, 11...Fixing bolt hole, 12.
...Fixing bolt.

Claims (1)

[Claims] 1. A shaft rod of an adjustment pin having a part of the adjustment shaft having an approximately vertical moon-shaped cross section with a part of the circumference removed is inserted into an eccentric position between the head and the shaft, and the rotation of the adjustment pin causes the above-mentioned Using a mounting bolt that allows the amount of protrusion of the shaft rod of the adjustment pin from the shaft to be varied, the mounting bolt is used to transport the mounting object by a crane and bring it into contact with the object to be mounted, while it is suspended by the crane. After temporarily fixing the mounting bolt to the object, the crane is released, and the adjustment pin, which is eccentrically fitted into the shaft of the mounting bolt, is rotated to align the axis of the mounting bolt vertically, horizontally, and vertically with respect to the object. A method for centering and mounting a heavy object, which is characterized by finely adjusting the position of the object relative to the object by moving it in any direction, and fixing the object to the object using a fixing bolt.