JPH0573520B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a backing metal holding device for holding down a backing metal when the backing metal is attached to the inner end of a column, for example.

(Prior art) For example, when temporarily attaching a backing metal to a predetermined position on the inside end of a column, the backing metal is fixed to the end of the column with a clamp or the like, and in this state, several places are attached. It was temporarily attached by welding.

This method using a clamp requires correction work with a hammer in order to press the backing metal onto the column quickly, which is a complicated work, and it is difficult to firmly fix the backing metal in the specified position. The problem was that it was difficult to do so.

Therefore, as a solution to such problems, a backing metal pressing device using a hydraulic cylinder mechanism has been considered. That is, by appropriately moving the piston rod of the hydraulic cylinder mechanism in and out, the backing metal is pressed against the inner end of the column by both ends of the hydraulic cylinder mechanism, and in this state, it is temporarily attached at several points by welding. In order to accommodate various columns with different diameters, pieces of various lengths can be used as attachments, and these can be replaced as necessary.

(Problems to be Solved by the Invention) The conventional configuration described above has the following problems.

That is, the diameter of the column is various (for example, seven types from 700 mm to 400 mm), and the thickness of the column is also various (for example,
There are six types (from 32mm to 16mm). Therefore, in order to deal with these various cases using the conventional backing metal presser, there was a problem in that a large number of pieces of a plurality of different sizes had to be prepared.

The present invention has been made based on these points, and its purpose is to provide a backing metal presser device that can accommodate columns of various diameters and columns of various thicknesses with a small number of parts. It is about providing.

(Means for Solving the Problems) In order to achieve the above object, a backing metal pressing device according to the present invention includes a cylinder mechanism including a cylinder and a sliding body retractably housed in the cylinder; a driving means for driving the sliding body to move in and out; a tip piece having a plurality of different lengths prepared in advance and detachably attached to at least one of the cylinder and the sliding body of the cylinder mechanism; and the tip piece. It is characterized by comprising an adjustment bolt that is retractably attached to the tip of the holder.

(Function) For example, when temporarily attaching a backing metal to the inner end of a column, with the backing metal placed at a predetermined position on the inner end of the column, use the backing metal holding device according to the present invention. Twist and press to secure.

At this time, for example, one tip piece having an optimal length is selected from among a plurality of tip pieces having different lengths, taking into consideration the diameter of the column, and attached to either one of the cylinder mechanisms.

Further, depending on the thickness of the column, the adjustment bolt at the tip of the tip piece is moved in and out as appropriate so that the length of the tip of the cylinder mechanism on the opposite side to the tip of the tip piece is slightly shorter than the inner diameter of the column.

Thereafter, the cylinder mechanism is placed at a predetermined position within the column, and the piston rod is extended by the driving means to press the backing metal against the column. Then, it may be temporarily attached by welding.

When selecting and installing the tip pieces, as mentioned above, instead of selecting one tip piece and attaching it to either end of the cylinder mechanism, you can select two pieces and attach them to both ends of the cylinder mechanism. You can do it like this.

The key is to prepare multiple tip pieces of different lengths in advance, select the optimal one according to the diameter of the column, and then use the adjustment bolt to adjust the length to the optimal length according to the thickness of the column. The feature is that it can be adjusted to accommodate columns of various diameters and thicknesses by simply selecting and attaching a small number of tip pieces and moving adjustment bolts in and out.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 7. FIG. 1 is a perspective view showing a state in which backing metals 5, 5 are pressed against a predetermined position on the inner end of a column 3 using the backing metal pressing device 1 according to this embodiment.

The backing metal pressing device 1 includes a cylinder mechanism 7
, a hydraulic pump 9 as a driving means for driving this cylinder mechanism 7 , and a tip piece 11 attached to one end side of the cylinder mechanism 7 . The hydraulic pump 9 and the cylinder mechanism 7 are connected via a hydraulic hose 13.

The cylinder mechanism 7 has a configuration as shown in FIG. First, there is a cylinder 15, and a cover 17 is covered and fixed on the left side of the cylinder 15 in the figure. Inside the cylinder 15,
A piston rod 19 as a part of the sliding body is housed so as to be slidable in the left and right directions in the figure.

Also, on the left side of the piston rod 19 in the figure,
The plunger 21 as a part of the sliding body is the cover 1
7, and is housed so as to be slidable in the left-right direction in the figure. A flange 23 is formed at the right end of the plunger 21 in the figure, and a compression coil spring 25 is provided between the flange 23 and the cover 17.
is installed. The plunger 21 and the piston rod 19 are always urged to the left in the figure by the compression coil spring 25.

At the tip of the plunger 21, there is an adjustment bolt 2.
7 is screwed in, and its protrusion length can be adjusted by rotating it appropriately.

A pressure oil port 29 is formed in the cylinder 15, and the already mentioned hydraulic hose 13 is connected to this pressure oil port 29. The pressure oil supplied through the pressure oil port 29 acts on the right side of the piston rod 19 in the figure, and thereby moves the piston rod 19 and plunger 21 to the left side in the figure against the spring force of the compression coil spring 25. slide. Further, when the action of the pressure oil is stopped, the plunger 21 and the piston rod 19 slide and return to the right in the figure by the spring force of the compression coil spring 25.

Now, the right side of the cylinder 15 is a shaft part 31, and the already mentioned tip piece 1 is attached to this shaft part 31.
1 is designed to be crowned and fixed. As for the fixing method, a recess 33 is formed on the shaft portion 31 side, and a fixing bolt 35 is screwed into the tip piece 11 side. This fixing bolt 3
The tip piece 11 is fixed to the shaft portion 33 by screwing in the tip 5 and engaging the tip in the recess 33 .

An adjustment bolt 3 is attached to the tip of the tip piece 11.
7 is screwed in. That is, by loosening the lock nut 39 and rotating the adjustment bolt 37 in an appropriate direction, the protrusion length can be adjusted.

The hydraulic pump 9 has a configuration as shown in FIG. This hydraulic pump 9 is of a foot-operated type, and discharges pressure oil by depressing a pedal 41. Further, in order to release the hydraulic pressure, another pedal 43 may be depressed.

By the way, as for the tip piece 11 already explained, a plurality of types of pieces having different lengths are prepared in advance. That is, depending on the diameter D and thickness d of the column 3, one with the optimum length is selected from a plurality of types of tip pieces 11 and used.

Specifically, the type shown in FIG. 6 is prepared as the tip piece 11 for the opposite side.
Further, as the diagonal tip piece 11, the type shown in FIG. 7 is prepared. The unit of length is (mm).

Note that this is just an example and is not limited to what is shown in the figure.

The operation will be explained based on the above configuration.

As shown in FIG. 1, the backing metals 5, 5 are arranged at predetermined positions on the inner end of the column 3, and are pressed against the column 3 by the backing metal pressing device 1 according to this embodiment. Fix it.

At this time, first, a tip piece 11 having an optimal length is selected from among a plurality of types of tip pieces 11 according to the diameter D of the column 3. The selected tip piece 11 is attached to the shaft portion 3 of the cylinder 15 of the cylinder mechanism 7.
Fixed to 1.

Next, depending on the thickness d of the column 3, rotate the adjustment bolt 37 attached to the tip piece 11 in an appropriate direction to adjust the length of the tip of the adjustment bolt 37 and the tip of the bolt 27 on the plunger 21 side. adjust. This is done by making the length of the tip piece 11 and the tip of the cylinder mechanism 7 slightly shorter than the inner diameter of the column 3, in order to apply the desired pressure when pressing the backing plates 5, 5 with the cylinder mechanism 7. This is to ensure that a certain amount of time is created. In other words, even if the column 3 has the same diameter, the inner diameter will differ if the thickness is different, so the adjustment bolt 37 is moved in and out within its stroke range to provide an appropriate distance.

Next, the cylinder mechanism 7 with the tip piece 11 fixed is placed between the pair of backing metals 5, 5.

In this state, the hydraulic pump 9 is operated to supply pressure oil to the cylinder mechanism 7. As a result, the plunger 21 protrudes, and the pair of backing metals 5, 5 are pressed against the inner end of the column 3 with an appropriate force by the tip of the adjustment bolt 37 and the tip of the bolt 27 on the plunger 21 side. I can do it.

After that, weld the backing metals 5 and 5 to column 3.
You can temporarily attach it to the

In addition, when welding and fixing the backing metals 5, 5 to the column 3, first, as shown in FIG. 1, the opposite sides are welded and fixed. Next, as shown in FIG. 4, the diagonal corners are welded and fixed. Finally, as shown in FIG. 5, the tips of the respective backing metals 5, 5 are welded and fixed.

Of course, various methods are used for this work depending on the shape of the backing metal 5, and the key is to weld at several arbitrary points so that the backing metal 5 is fixed in close contact with the column 3.・Just fix it.

According to this embodiment, the following effects can be achieved.

First, columns 3 of various diameters D and various thicknesses d
The column 3 can be easily supported by one backing metal pressing device 1 and a plurality of tip pieces, and the number of tip pieces 11 can be significantly reduced.

That is, by selecting an arbitrary tip piece 11 from among a plurality of types of tip pieces 11 having different lengths,
This is because it only needs to be attached to the tip 11 of the cylinder 15, and the adjustment bolt 37 of the tip piece 11
This is because the lengths of the tip of the adjustment bolt 37 and the tip of the bolt 27 on the plunger 21 side can be adjusted with respect to the thickness d of the column 3 by appropriately moving the bolt 37 in and out.

Furthermore, the attachment/detachment of the tip piece 11 is extremely simple, as it only involves loosening or screwing in the fixing bolt 35, and the length of the tip of the adjustment bolt 37 and the tip of the cylinder mechanism 7 can also be adjusted by simply loosening or screwing in the fixing bolt 35. It is extremely simple, as all you have to do is rotate it appropriately.

Note that the present invention is not limited to the above embodiment.

For example, the driving means may be an electric hydraulic pump instead of a foot-operated hydraulic pump.
Further, the cylinder mechanism and the driving means may be of an air type.

The tip piece 11 may also have various lengths other than those shown in FIGS. 6 and 7.

Further, in the above embodiment, the tip piece 11 is attached to the shaft portion 31 of the cylinder 15 of the cylinder mechanism 7, but it may be attached to the plunger 21 side, or may be attached to both sides.

(Effects of the Invention) As detailed above, according to the backing metal pressing device of the present invention, an arbitrary tip piece can be selected from among a plurality of types of tip pieces having different lengths and attached to at least one of the cylinders. By installing and adjusting the length of the cylinder mechanism with the adjustment bolt attached to the tip of the tip piece, it is possible to easily accommodate columns of various diameters and thicknesses with one cylinder mechanism and a small number of tip pieces. be able to.

[Brief explanation of the drawing]

1 to 7 are views showing one embodiment of the present invention, in which FIG. 1 is a perspective view showing a state in which a backing metal is pressed against a column by a backing metal pressing device, and FIG.
The figure is a sectional view of the cylinder mechanism, FIG. 3 is a perspective view of the hydraulic pump, FIGS. 4 and 5 are front views showing the state in which the backing metal is pressed against the column by the backing metal holding device, and FIGS. FIG. 7 is a diagram showing an example of the types of tip pieces. 1...Backing metal presser device, 3...Column, 5
...Backing metal, 7...Cylinder mechanism, 9...Driving means, 11...Tip piece.

Claims (1)

[Claims] 1. A cylinder mechanism consisting of a cylinder and a sliding body housed in the cylinder so as to be retractable, a driving means for driving the cylinder mechanism to cause the sliding body to move in and out, and a plurality of cylinder mechanisms having different lengths prepared in advance. A backing metal holder comprising: a tip piece that is detachably attached to at least one of the cylinder and the sliding body of the cylinder mechanism; and an adjustment bolt that is detachably attached to the tip of the tip piece. Device.