This application claims priority of Japanese Patent Application No. 2020-194186 filed Nov. 24, 2020, which is hereby incorporated herein by reference in its entirety.
The present invention relates to a scraper for removing a welded material adhering to a work piece during welding or fusing. In particular, it relates to a scraper that removes fusing slag generated during fusing.
Conventionally, in order to remove the welded material adhering to the workpiece during welding or fusing, a scraper, having a flat blade-shaped blade provided on a tip side, a striking portion provided on a rear end side, and a grip portion provided between the blade and the striking portion, has been used.
When using the scraper, user grippes the grip portion, presses the cutting edge of the blade against the workpiece to which the welded material adheres, and hits the striking portion with a hammer to push the cutting edge toward the welded material so as to scrape the welded material from the work piece.
However, when scraping the welded material such as fusing slag and dross adhering to the work piece during fusing, in the conventional scraper, the cutting edge may slip in the width direction of the blade and come off from the work piece, and in that case, fusing slag cannot be scraped off.
Therefore, an object of the present invention is to provide a scraper capable of accurately scraping fusing slag without slipping the cutting edge.
To solve the above problems, the present invention is a scraper for removing a welded material adhering to a work piece, comprising:
a flat blade-shaped blade provided on a tip side of the scraper,
a striking portion provided on a rear end side,
a grip portion provided between the blade and the striking portion, and
a slit extending in the length direction of the blade, which is formed on one surface of a plane along the width direction of the blade, wherein
the slit has an open at the cutting edge and at least two adjacent side walls in the length direction,
the cutting edge of the blade is pressed against the welded material adhering to the work piece by fusing or welding to scrape the welded material from the work piece,
when the cutting edge of the blade is pressed against the welded material, the side wall surface prevents the blade from moving in the width direction when the welded material is inserted into the slit and comes into contact with the side wall.
In the scraper of the present invention, since a slit that is opened at the cutting edge and has a side wall in the length direction is formed in the blade, a part of the welded material enters the slit when scraping. Then, even if the cutting edge tries to slip, the welded material collides with the side wall of the slit, so that the cutting edge cannot move in the width direction. Therefore, since the cutting edge moves only toward the tip, the welded material can be accurately scraped from the workpiece without slipping.
Hereinafter, a scraper according to an embodiment of the present invention will be described with reference to the drawings. In
The scraper 1 comprises a flat blade-shaped blade 2 provided on a tip side, a striking portion 3 provided on a rear end side, and a grip portion 4 provided between the blade 2 and the striking portion 3. A rear end of the blade 2 is integrated with a flat plate-shaped continuous portion 5 extending rearward, and a striking portion 3 is fixed to a rear end of the continuous portion 5.
The striking portion 3 is formed to be thicker than the continuous portion 5, and a hammer is striking the rear end of the striking portion 3. The grip portion 4 is formed by sandwiching a front side and reverse side of the continuous portion 5 with wooden flat plates 6, 6, and fixing the flat plates 6, 6 and the continuous portion 5 with pins 7, 7.
As shown in
Further, as shown in
Next, a method of using the scraper 1 will be described with reference to
As shown in
Since the slit 22 is formed in the scraper 1, when the cutting edge 21 is pushed toward the forward, a part of the fusing slag 9 enters the slit 22. Here, since the fusing slag 9 is a molten metal, it is hard and has an irregular shape. Therefore, even if the cutting edge 21 is pushed forward, the blade 2 may slide in the width direction of the blade 2, for example, in the left-right direction.
However, since the slit 22 is formed in the scraper 1, when the cutting edge 21 tries to slide in the left-right direction, the fusing slag 9 that have entered the slit 22 come into contact with the side wall 23 or 24 of the slit 22. Since the side wall 23 or 24 comes into contact with the fusing slag 9 that has entered the slit 22 and cannot move further in the left-right direction, the cutting edge 21 cannot slide in the left-right direction. Therefore, since the movement of the cutting edge 21 in the left-right direction is restricted, the cutting edge 22 can be pushed forward without slipping, and the fusing slag 9 can be accurately ground.
Next, a method of grinding the fusing slag 9 of a corner portion 83 in which the surface 81 of the steel plate 8 and the cut surface 82 are in contact with each other as shown in
Then, when the cutting edge 21 is pushed forward, the fusing slag 9 on the surface 81 side of the corner portion 83 is ground by a tip of the side wall 23, and the fusing slag 9 on the cut surface 82 side of the corner portion 83 is ground by a tip of the side wall 24. As described above, since the slit 22 of the scraper 1 is formed in a V groove having an opening angle of 90 degrees, the scraper 1 can easily grind the fusing slag 9 with respect to the corner portion 83 where it is difficult to grind the fusing slag 9.
In the present embodiment, one slit 22 is formed at the center of the blade 2 in the width direction, but a plurality of slits 22 may be formed along the width direction. For example, as shown in
Further, as shown in
The length of the slit 22 is about 10 to 30 mm, but the length is not limited to this, and if the movement of the cutting edge in the width direction is restricted by the side wall contacting the fusing slag, the length may be 10 mm or less, and 30 mm or more. However, the more the fusing slag is ground, the more the blade 2 is worn down. Therefore, it is desirable that the length of the slit 22 is at least about 10 mm or more so that the blade 2 can be used even if it is worn down.
Number | Date | Country | Kind |
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2020-194186 | Nov 2020 | JP | national |