JPH0312460Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention relates to a gripper for carbon electrode rods (hereinafter referred to as a gouging torch) used for gouging and blasting work on base materials such as iron plates. In particular, the present invention relates to a gouging torch in which the head portion of the torch is fixed by providing a groove in the end face and fitting a washer thereinto for easy and reliable attachment.

(Prior art) Conventional gouging torches are, for example,
As shown in Japanese Patent No. 18725 or Figures 2 and 3, the shaft of the head of the gouging torch was fitted into the main body, and this was attached to the bed using screws for fixing it.

However, as the conventional gouging torch described above is used over and over again, it gradually loosens due to the rotation and vibration of the head during use, as well as the impact caused by air pressure, and air leaks from the loosened part. Insufficient air flow makes it difficult to blow away the molten metal generated during gouging through the air holes in the head, reducing the removal efficiency of the metal base material and increasing the amount of molten metal adhering to the base material. As a result, work efficiency is significantly reduced. As a result, the removal efficiency and working efficiency of the metal base material are reduced in this way, and this often results in adverse effects such as the rough finish of the gouged or blasted surface or the formation of an uneven surface.

(Problems to be Solved by the Invention) The present invention eliminates and improves the above-mentioned drawbacks of the conventional gouging torch head, eliminates air leakage from the torch head, and enhances air jetting from the head air hole. The purpose of this is to maximize the effect of applying voltage to the base material and carbon electrode to generate an arc, which is the principle of the arc air method, and blowing away the molten metal with compressed air due to the heat of the arc. It is.

(Means and effects for solving the problems) As shown in FIGS. 4 and 5, the present inventors lengthened the shaft of the head of the gouging torch,
A groove is provided near the end face opposite to the base, and an E-type retaining ring (hereinafter referred to as a washer) is fitted into the groove to secure it to the torch body, eliminating air leakage without interfering with the operation of the torch head. As a result of repeating many tests, we obtained the knowledge that
This is the result of this invention.

That is, the gouging torch of the present invention has a main body that includes an air control valve and a head that grasps the carbon electrode rod, and a hose that communicates with the compressor is connected to the head, and the gouging torch is inserted along the carbon electrode rod from a small hole in the head. In order to fix the head of the torch to the torch body, which has a structure that blows out air, the head shaft is lengthened, a groove is provided near the end surface opposite to the base, and the washer is fitted into the head shaft. It is made by mounting and attaching it.

The results of using the gouging torch of the present invention and comparing them with conventional torches are as follows.

With the gouging torch of this invention, no abnormalities were observed even after about one year of use, and as there was no air leakage from the head of the torch, air was now ejected in a concentrated manner from the air holes. It became. As a result, the efficiency of the gouging work and the removal efficiency of the metal base material were improved, and the finished surface of the base material was in extremely good condition, making it possible to achieve the original purpose of the gouging and blasting work.

On the other hand, with conventional gouging torches, after two to three months of use, most of the screws loosen at the head fixing part, causing air leakage and reducing work efficiency. The machined surface deteriorated significantly.

(Effects of the Invention) As described above, the present invention provides the following numerous effects.

1 The head according to the present invention is fixed to the torch body by fitting a washer into the groove instead of screwing the head with screws as in conventional products, so there is no possibility of rotation or vibration of the head during use. This prevents the fixed portion from loosening, which has the effect of eliminating air leakage from the head portion.

2 By eliminating air leakage from the head part, air is ejected from the air hole in the head in a concentrated manner, improving the removal effect of molten metal on the gouging surface of the metal base material, and furthermore, the molten metal is removed from the metal base material. Since adhesion to the surface can be reduced, work efficiency can be significantly improved.

Furthermore, it has the effect of improving work efficiency and reducing the cost of the work without impairing the original function.

Therefore, the present invention provides a torch in the field of use in gouging and blasting operations, which is extremely useful.

[Brief explanation of the drawing]

Figure 1 is a side view of the gouging torch, Figure 2 is a side view of the gouging torch;
The figure is an enlarged cross-sectional view of the head portion of a conventional gouging torch, FIG. 3 is a vertical cross-sectional view corresponding to FIG. 2, and FIG. FIG. 5 is a longitudinal sectional view corresponding to FIG. 4. Explanation of symbols: In the above drawings, 1...Torch head portion, 2...Air hole, 3...Torch body, 4...Head screw, 5...Washer.

Claims (1)

[Scope of utility model registration request] The torch body is equipped with an air control valve and a head that holds the carbon electrode rod, and a hose that communicates with a compressor is connected to the head, and air is jetted out along the carbon electrode rod from a small hole in the head. In order to fix the head to the torch body, the shaft of the head is lengthened and a groove is provided near the end face opposite to the base.
A gouging torch that is attached by fitting a washer into the groove.