JP2020193466A - Replaceable blade for electric scraper - Google Patents

Abstract

To solve the problem that an adhesive residue removing work performed in an indoor reform work or the like has to be coped with by pulling out a nail or a tacker nail or driving them with a hammer when the nail or the tacker nail is protruded from a surface, that is, it is often difficult to simply scrape off the adhesive with a scraper.SOLUTION: In a replaceable blade for a scraper that is installed and fixed to a drive source with a small amplitude reciprocating circular motion to remove adhesive residue and protruding metal on a surface of a building material, the thickness of the blade is constant at the tip part, and the formed cutting tooth is cut in a plane perpendicular to the front and rear surfaces of the blade.SELECTED DRAWING: Figure 1

Description

According to the present invention, adhesive residue, nails, and tacker nails on the surface of building materials are installed and fixed to a drive source that makes a reciprocating circular motion with a very small amplitude (rotation angle), which is generally called "vibration multi-tool". It relates to the structure of the scraper replacement blade for removing all of the above.
Although the term "arc vibration" is used hereinafter in the present specification, it means "reciprocating circular motion with a small amplitude (rotation angle)".

A scraper is a tool used for thinly scraping the outer surface and surface of an object, and is one of the tools frequently used in construction work, especially in remodeling work that aims to beautify and strengthen by leaving conventional facilities. For example, when performing indoor remodeling, the existing wallpaper or gypsum board is peeled off and replaced with a new one. At that time, the traces of roughly peeling off the wallpaper or gypsum board usually leave residue such as nails (nails, tacker nails, etc.) and adhesives. Therefore, it is indispensable to remove the residue (base adjustment work) in order to proceed with the work, which is unexpectedly troublesome.

If there are nails or tacker nails coming out from the surface, you can remove the adhesive residue by pulling it out with a nail puller or hammering it in. If there is solidified adhesive, scrape it off with a scraper. , Is the basis.
That is, the basic work is to carry a nail puller, a mallet, and a scraper, determine the type of adhesive residue, and take out an appropriate tool from the tool to use it.
A scraper is a tool that presses a knife edge with a sharp tip against an object, so it is suitable for removing adhesive, but it is dangerous because the blade part may be damaged if it hits a nail that has been driven in. .. Therefore, even in the work of pressing against the solidified adhesive and peeling it off, the work is performed while checking whether the head of the nail is hidden under the adhesive. Of course, if you find a nail, you need to avoid it or stop the work and switch to nail removal work.

Nail pullers and mallets are used to dispose of nails, but in situations where the nails are covered with adhesive, it is difficult to use both nail pullers and mallets. In such a case, it is difficult to remove the adhesive residue with a nail puller or a mallet, so it is necessary to remove it with a yatko or nippers.

Japanese Unexamined Patent Publication No. 5-202621

Therefore, many kinds of tools are required for efficient work, and the work has been done while paying attention to whether nails and the like are hidden.

On the other hand, there is a tool called a vibration multi-tool. In this method, cutting, scraping, polishing, and grinding are performed by installing and fixing a spare blade or pad to a drive source that vibrates in an arc. Among such spare blades, those formed by a knife edge with a sharp tip are commercially available as scrapers.

When this blade is pushed into the adhesive mark, the adhesive can be peeled off somewhat easily due to the combination of the pushing force and the arc vibration. However, there is no difference even if it is a power type, regarding the trouble caused by encountering nails and the like.

Therefore, the present inventor has finally made the present invention as a result of diligent research in view of the above points, and its feature is that it is attached and fixed to a drive source that makes a reciprocating circular motion with a small amplitude, and is attached to the surface of the building material. It is a replacement blade for scrapers that removes certain adhesive residue and protruding metal, and the thickness of the blade is constant at the tip, and the cut teeth formed are cut on the surface perpendicular to the front and back surfaces of the blade. Moreover, there is no shaving.

That is, the replacement blade of the electric scraper according to the present invention is, first of all, not formed with a sharp tip. In addition, the thickness of the tip portion is constant, and so-called "clams" are not attached. Furthermore, the cut teeth are cut on a surface perpendicular to the front and back surfaces of the blade as if they were cut with a jigsaw, and the teeth are not oriented diagonally. That is, although it is provided with something like a saw cutting tooth, it can be said that it is a spare blade having a cutting tooth structure that cannot be called a saw.

From the above, while having the ability to scrape off the adhesive residue, it also has the strength to proceed while cutting the nail or the like even if it is encountered.

First, the reason for having the ability to scrape off the adhesive residue will be explained. In the case of a conventional scraper with a knife edge, the wedge-shaped tip fits into the adhesive residue, and the wedge tip cuts the gap between the adhesive residue and the base material, so the peeled adhesive residue is the blade tip. Easy to adhere to.
On the other hand, the replacement blade of the present invention does not have a knife edge. Instead, it has cut teeth. Therefore, the arc vibration of the cut teeth causes the adhesive residue to proceed while breaking the bottom portion (the portion close to the base material). The thickness of the blade is often smaller than the thickness of the adhesive residue, and in that case, the blade rushes into the residue while scooping the foot of the adhesive residue. And in such a situation, it is unlikely that the scooped residue will adhere to the blade.

Next, I will explain the reason why even if I come across a nail or the like, it has enough strength to go on while cutting it. Saw blades have cutting teeth, but each cutting tooth usually consists of a surface that is cut at a right angle to the wide surface of the saw blade. However, in the present invention, the scraper has a saw-shaped cutting tooth, and the cutting tooth is composed of only a surface perpendicular to a wide surface.
That is, cut teeth are formed by cutting one side surface of a flat thin plate with a surface perpendicular to the side surface. The entire blade vibrates in an arc, but at that time, the surfaces constituting the cutting teeth come into contact with each other while catching the nail or the like in front, and the possibility of the blade spilling is reduced. In addition, it does not have a knife edge, so it has very high strength.

Further, claim 2 proposes that the planar shape of the cut tooth is a continuous shape of isosceles triangles having the same shape. This shape is called "zigzag shape". A zigzag-shaped cutting tooth is called a "zigzag cutting tooth". By making the cutting teeth zigzag, the cutting ability when the blade vibrates in an arc is equal in the right and left directions, so that a feeling of strangeness is not felt during work.

In the present invention, even if a nail or the like is encountered during the work, the nail or the like is pierced as it is and the nail or the like is cut. Therefore, it is preferable that the strength (hardness / toughness) of the cut tooth portion is high. Such improvements may be added as appropriate, and the present invention does not preclude such improvements.

The replacement blade of the electric scraper according to the present invention is a replacement blade of a scraper that removes adhesive residue and protruding metal on the surface of a building material by attaching and fixing to a drive source that makes a reciprocating circular motion with a small amplitude. The thickness of the blade is constant at the tip portion thereof, and the cut teeth formed are characterized in that they are cut on a surface perpendicular to the front and back surfaces of the blade and are not provided with a set. It is an extremely advanced invention having the effects described below.

(1) Although it is a scraper, it has cutting teeth such as a saw blade, so it is possible to remove any adhesive residue or protruding metal.
(2) Since the cutting teeth are cut on a surface perpendicular to the front and back surfaces of the blade, the blade is less likely to spill.

It is a schematic plan view which shows an example of the spare blade of the electric scraper which concerns on this invention. (A) and (b) show the vicinity of the cutting tooth of the spare blade of the electric scraper according to the present invention, (a) is a schematic plan view, and (b) is a partial enlarged view of A. (A) and (b) show the vicinity of the cutting tooth of the spare blade of the electric scraper according to the present invention, (a) is a schematic front view, and (b) is a B partial enlarged view thereof. (A) and (b) show an example of the working surface of the replacement blade of the electric scraper according to the present invention, (a) is before the working surface is exposed, and (b) is after the exposed surface. Is shown. It is a schematic perspective view which shows an example of the vibration multi-tool which is going to install the replacement blade of the electric scraper which concerns on this invention.

FIG. 1 shows an example of a replacement blade 1 (hereinafter referred to as “replacement blade 1 of the present invention”) of the electric scraper according to the present invention. The replacement blade 1 of the present invention is for a vibration multi-tool, and as is clear from the figure, the replacement blade 1 of the present invention of this example is formed in a zigzag shape so that the cutting ability when the reciprocating engine is moved is equal in reciprocation. It is provided with a zigzag cutting tooth 2.

A connecting mechanism for the vibration multi-tool is provided on the side opposite to the side where the zigzag cutting teeth 2 are provided. In the case of this example, the connecting hole 3 is fitted into a protrusion (not shown) on the vibration multi-tool side to be united. However, there are various structures of the connecting mechanism portion, and the structure is not limited to the illustrated structure. FIG. 5 shows an example of a state in which the replacement blade 1 of the present invention is to be attached to the vibration multi-tool.

The zigzag cutting teeth 2 are a plan view and an enlarged view of a portion A in the plan view 2 (a) and (b), and a front view and an enlarged view of a portion B in the plan view 3 (a) and (b). As is clear from the above, one side end of the blade is sharpened in a shape cut only on a surface perpendicular to the wide surface 4. Further, as is clear from FIG. 2, the zigzag cutting is composed of continuous repetition of isosceles of the same shape with the tooth tip 21 as the apex. If the cutting tooth is zigzag, the cutting ability does not change between forward and backward movement, but if there is a difference in ability between forward movement and reverse movement like a normal cutting tooth, one (forward movement or recovery) Due to the structural feature that the cutting tooth slips due to (movement) and does not slip on the other side, even though the vibration multi-tool is pushed, it behaves as if it bends to one side from the pushing direction. This is especially true when there are extensive adhesive marks and the vibrating multi-tool rushes through them. Therefore, when the cut teeth are zigzag as in the present invention, handling becomes easier.

Further, although the saw blade usually has a "clam", as is clear from FIG. 3, the replacement blade 1 of the present invention does not have a "clam" or a structure in place of the "clam". The absence of clams drastically reduces the risk of the cut teeth damaging the underlying side (body surface, wall surface, etc.) during scraper work.

4 (a) and 4 (b) show a state in which the decorative board B is stretched on the wall body A [FIG. 4 (a)] and a state in which the decorative board B is peeled off [FIG. 4 (b)]. is there. The state shown in FIG. 3B is the working portion of the replacement blade 1 of the present invention. In the state of FIG. 3B, the adhesive traces X of various sizes and the head portion of the tacker nail Y are exposed. Both the adhesive and the tacker nail were used to join the wall body A and the decorative board B, and when the decorative board B was peeled off, the head of the tacker nail Y was approximately the thickness of the decorative board B. It is far from the surface of the wall body A. In addition, a part of the decorative board B may remain on the adhesive side when it is peeled off.
The method of removing the decorative board B may be any method as long as it can be indicated by the phrase "peeling", and the present invention is not involved. Nor will it be detailed.

The peeling operation is as simple as turning on the switch of the vibration multi-tool equipped with the spare blade 1 of the present invention and moving it on the wall body A toward the adhesive mark X and the tacker nail Y. Since it is assumed that metal members such as nails will be cut, the material must have toughness as well as hardness.

1 Spare blade of electric scraper according to the present invention 2 Zigzag cutting tooth 21 Tooth tip 3 Connecting hole 4 Wide surface (of saw blade) A Wall body B Decorative board X Adhesive mark Y Tucker nail

Claims (2)

It is a scraper replacement blade that removes adhesive residue and protruding metal on the surface of building materials by installing and fixing it to a drive source that makes a reciprocating circular motion with a small amplitude, and the thickness of the blade is constant at the tip. , The cut teeth to be formed are cut on a surface perpendicular to the front and back surfaces of the blade, and are not provided with a set, which is a replacement blade for an electric scraper. The replacement blade for an electric scraper according to claim 1, wherein the planar shape of the cut tooth is a continuous shape of isosceles triangles having the same shape.

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