JPH024793Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a corner dry box device used for welding two-sided corner sections underwater.

When performing TIG welding, plasma welding, MIG welding, etc. underwater, it is necessary to completely isolate the area around the welding arc from water and create a shielding gas atmosphere by some method, and various methods have been proposed so far. There is. Among them, the welding torch is housed in a small box and the box is pressed against the surface to be welded to drain the surrounding water.
There is a method of creating a shielding gas atmosphere around the surface to be welded, and in this method, the method of fixing and sealing the box is generally relatively simple. However,
The method of fixing and sealing the box when welding the two-sided corner portions shown in FIGS. 1a, b, and c, respectively, is not easy. That is, Fig. 1a shows two flat plates 2, 2' that form a substantially right angle, and the angle material 1 is applied from the outside and welded together, and Fig. 1b shows the same angle material 1 welded to the flat plates 2, 2'. Figure c shows another angle material 1' welded against the inside of the flat plates 2, 2'. Particularly when welding two corner portions having different shapes as shown in FIGS. 1a, b, and c, there is a problem in that the shape of the seal portion of the box must be changed depending on the shape.

The present invention was developed to effectively solve the above problems, and its purpose is to provide high installation and sealing performance even for two-sided corners with different shapes, and to be able to be operated remotely. The purpose of the present invention is to provide a corner dry boxing device that can be used.

In order to achieve this purpose, the present invention uses a sealing structure around the opening of the box as a base made of a hard cell sponge and a soft cell sponge bonded thereon. At the same time, an air cylinder is installed on the opposite side, and a metal fitting that supports two suction cups to be sucked on two sides is fixed to each cylinder, and a guide rod for positioning the center of the box at the center of the corner is attached to the metal fitting. Furthermore, the device of the present invention is characterized in that a shielding gas supply port and a shielding gas discharge port are provided at the top and bottom of the box, respectively.

A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 is a perspective view of the box, FIG. 3 is a partially cutaway plan view of the device of the present invention, and FIG. 4 is a side view of the device.

The box 3 shown in Fig. 2 is molded from acrylic resin, and one corner of the box 3 is open as shown in the figure.A hard single-cell sponge 4 is attached to the periphery of this opening, and a soft single-cell sponge 4 is pasted on the periphery of this opening. The sponges 5 are bonded together, and the hard single-cell sponge 4 and the soft single-cell sponge 5 perform a sealing action.

Incidentally, above and below the box 3, as shown in FIGS. 3 and 4, air cylinders 7 and 7' are arranged toward the center of the two-sided corner of the workpiece w to be welded, and a cradle 6,
6', each air cylinder 7,
At the tip of the rod 7' is a roughly L-shaped metal fitting 8,
These metal fittings 8, 8' are connected to the pedestals 6, 6' and guide shoes 9a, 9, respectively.
b, 9c, and 9d (although 9d is not shown, it is located below 9b). At both ends of each metal fitting 8, 8', a flat plate 2 of the material to be welded w,
2', the suction cups 11a, 11b, 11c,
11d are attached to each. 1 sucker each
1a, 11b, 11c, 11d have bushes 13a, 13b, 13c, 13 on both ends of the metal fittings 8, 8'.
d (13a, 13c, 13d are not shown).
Pin 14 at the tip of a, 12b, 12c, 12d
The shafts 12a, 12b,
12c and 12d (12d is not shown but is located below 12b) have coil springs 15a and 15 at the rear.
b, 15c, 15d (15b, 15c, 15d are not shown) to the cap 16a,
16b, 16c, 16d (16d is not shown but is located below 16b) are screwed, and suction cups 11a, 11b, 11c, 11d are connected to flat plate 2 by coil springs 15a, 15b, 15c, 15d.
The suction cups 11a, 11b, 11 when adsorbed to 2'
The shrinkage allowances c and 11d are absorbed. Further, a guide rod 10 for positioning the center of the box 3 at the center of the corner of the workpiece w to be welded is fixed to the center of the upper metal fitting 8 so as to coincide with the rod center of the air cylinder 7. A shield gas supply port 17 is attached to the upper side of the box 3, and a drain port (not shown) having the same shape as the shield gas supply port 17 is attached to the lower side.

Then, the box device is guided to the corner of the workpiece w to be welded by a guide device (not shown), but at this time, the rods of each air cylinder 7, 7' are kept in an extruded state. When the guide rod 10 attached to the rod end of the cylinder 7 via the metal fitting 8 is positioned at the center of the corner of the workpiece w to be welded, the center of the box 3 coincides with the center of the corner, and then the suction cup 11a, 11b, 11c, and 11d, these become coil springs 15a, 15b, and 15.
It is attracted to the flat plates 2 and 2' against the spring force of c and 15d. Next, if you pull the rods of both air cylinders 7, 7' at the same time, the coil springs 15a, 15b, 15
The box 3 moves forward by the spring forces c and 15d and comes into close contact with the corner portion of the workpiece w to be welded, and the box device is fixedly set on the workpiece w to be welded. After that, from the box 3 shield gas supply port 17 to the box 3
A healthy shielding gas atmosphere is formed within the box 3 by discharging water inside the box 3 to the outside through a drain port using a pump (not shown) while sealing a shielding gas inside. And box 3
By welding the angle material 1 to the flat plates 2, 2' using an internal welding torch (not shown), it is possible to obtain the same welding result underwater as in the air.

In addition, when removing the box device from the workpiece w to be welded, water is supplied into the box 3 and the box 3 is removed.
After the inside is filled with water, both air cylinders 7,
Push out the rod 7' at the same time to remove the box 3 from the corner of the workpiece w to be welded. Then, all the suction cups 11a, 11b, 11c, 11d are released from suction, the rods of both air cylinders 7, 7 are pulled again, and the box device is moved by the guide device.

In the above, since the sealing structure around the opening of the box is made of a hard cell sponge as a base and a soft cell sponge bonded thereon, the box 3 can be easily attached to the corner of two sides with a step. It is possible to attach the box, maintain a high level of sealing performance within the box, and operate the box device remotely.

[Brief explanation of the drawing]

Figures 1 a, b, and c are diagrams showing the types of corner shapes of materials to be welded, Figure 2 is a perspective view of a box according to an embodiment of the present invention, and Figure 3 is a partially cutaway plane of the apparatus of the present invention. FIG. 4 is a side view of the same device. In the drawing, 3 is a box, 4 is a hard cell sponge, 5 is a soft cell sponge, 7, 7' are air cylinders, 8, 8' are metal fittings, 10 is a guide rod, 11a,
11b, 11c, and 11d are suction cups, 17 is a shielding gas supply port, and w is a material to be welded.

Claims (1)

[Scope of utility model registration request] This is a box device that drains water around the welding area and creates a shielding gas atmosphere when welding two-sided corner parts underwater.The sealing structure around the opening of the box is made of hard single-cell sponge. A soft single-cell sponge is pasted on top of the base, and air cylinders are installed on the top and bottom of the box toward the center of the corner, and each cylinder has two suction cups that should stick to the two sides. A corner corner characterized in that a supporting metal fitting is fixed, a guide rod is attached to the metal fitting for positioning the center of the box at the center of the corner part, and a shielding gas supply port and a drainage port are provided respectively at the top and bottom of the box. Dry box equipment.