JPH0422966Y2 - - Google Patents

Description

[Detailed explanation of the invention] <Industrial application field> This invention involves pouring a hardening fluid such as concrete or plaster into the interior surrounded by a formwork, and removing the formwork after the fluid has hardened. When constructing a wall or a shaped object for an event, it is attached to the whole or part of the inner surface of the formwork by gluing or nailing in advance to prevent dents or protrusions on the wall or shaped object. This invention relates to a tool for forming a rough surface on a foamed resin mold material that expresses patterns, designs, etc.

<Prior art> As mentioned above, a foamed resin mold material is attached to the inner surface of the formwork, and a hardening fluid such as concrete or plaster is poured into the inside of the formwork, and as the fluid hardens, walls and events are formed. It is known from Japanese Patent Publication No. Sho 62-9439 to construct a model for use in the art.

Then, in order to improve the decorative effect by making the concave and convex surfaces of the patterns and designs expressed on walls and sculptures into finely uneven surfaces, it is necessary to It is necessary to form a rough surface on the convex surface of the mold material for molding a double face, or on the concave concave surface of the mold material for molding the convex surface of a pattern or design.

<Problems to be solved by the invention> In order to form a rough surface on the convex or concave surfaces of the shape material, conventionally, it was scratched with a wire brush using steel wire as the bristles. A rough surface was formed by scraping off the surface layer of the foamed resin.

However, since the hair of the steel wire is long and has elasticity, if the surface layer of the foamed resin is strongly scratched, the steel wire will bend and undergo elastic deformation, and then return to its original straight state.

For this reason, the force applied to the surface layer of the foamed resin by the steel wire is adjusted over the entire area of the surface to be roughened by scraping the surface layer of the foamed resin at a substantially constant depth, and the steel wire is bent just the right amount. is necessary, and the force to be applied is insufficient,
If the steel wire is not bent too much, it will only scratch the surface layer of the foamed resin, and if the applied force is excessive, the bent steel wire will straighten out and scratch the surface layer deeper than the intended depth. Scrape away. Therefore, skill is required to operate the wire brush.

In addition, the rough surface formed on foamed resin changes depending on the density of the steel wire of the wire brush used.
If the density of the steel wire is coarse, the irregularities on the rough surface will be coarse, and if the density is dense, the irregularities on the rough surface will be fine.
Therefore, when forming a rough surface on a foamed resin, it is necessary to use wire brushes with different steel wire densities depending on whether the roughness is coarse or fine.

<Means for Solving the Problems> Therefore, the present invention is capable of scraping and roughening the surface layer of foamed resin without requiring any skill, and also makes it possible to change the unevenness of the rough surface from coarse to fine. It was developed for the purpose of forming a rough surface on a foamed resin molded material, and is a processing tool in which the substrate is equipped with a shaft that is longer than the thickness of the board, has a sharp tip, and has a male thread on the outer periphery. It is characterized in that the pins are screwed through in a predetermined arrangement, and the sharp tip of the shaft of each processed pin protrudes from one side of the substrate.

<Example> In each illustrated example, 1 represents a substrate, and 2 represents a processing pin. The board 1 is a board made of wood or synthetic resin with a thickness of about 5 to 20 mm, and the processing pins are screw nails,
Tapping screws, screws, etc., which have a length L longer than the thickness t of the substrate 1, have a shaft 3 with a sharp point 4 at the tip, a male thread 5 on the outer periphery, and preferably have a head 6 at the other end. Good.

In the substrate 1, holes smaller than the diameter of the shaft 3 are opened in a predetermined array on both sides of the substrate.
One processing pin 2 is screwed into each hole with a male screw 5 on the outer periphery to penetrate and hold the board, and the sharp end 4 of the shaft is made to protrude from one side 1a of the board.

The tool in the embodiment shown in Figures 1 and 2 has a long side of approximately 20 cm.
The short side is about 8 cm, about the size of a blackboard eraser, and the thickness
It has a substrate 1 made of a 1.5 cm wooden board, and about 1.5 cm
Processing pins 2 consisting of a total of 65 screw nails arranged in 5 rows and 13 columns are screwed into place at intervals of cm. The length of each screw nail is approximately 2.5cm. The head 6 of the screw nail is dish-shaped, but it may of course be round.

When each nail is screwed in to the maximum, the tip of the screw protrudes about 1 cm from the surface 1a of the board. By grasping the substrate 1 in this state and scratching the surface of the foamed resin mold material with the tip of a screw nail, the surface layer of the mold material can be scraped to a depth of about 1 cm from the surface to make it rough. Of course, if the surface to be roughened is wide, the surface layer can be scraped more deeply.

Also, turn all the processing pins 2 in the direction of loosening the screws to reduce the amount of protrusion from the surface 1a of the board,
For example, make it protrude by 3 mm or 5 mm from surface 1a,
It is also possible to roughen the surface layer of the mold material by scraping it to a depth commensurate with the amount of protrusion.

Furthermore, out of the 5 rows of screws, make the 2nd and 4th rows face up.
Retract it so that it does not protrude from 1a, 1st row, 3rd row
The surface layer of the profile can be scratched with only some of the screws, such as scratching only with the screws in the fifth row, or retracting the even-numbered screws from surface 1a and scratching with only the odd-numbered screws. By scraping it off, it is possible to form a rough surface with rougher unevenness than if it were formed with all screws.

The tool of the embodiment shown in FIGS. 3 and 4 has a handle 7 connected to one end of a curved substrate 1 having a length of about 10.5 cm, a width of about 4.5 cm, and a thickness of about 1 cm. This tool is also carved out of wood, and has machining pins 2 screwed into the board 1, consisting of a total of 24 screws arranged in 3 rows and 8 columns at intervals of approximately 1.2 cm. The length of each screw is approximately 2 cm.

Similar to the tools in Figures 1 and 2, this tool also adjusts the protrusion amount of the screw nails that protrude from the surface 1a of the board, and uses all or part of the screw nails to scrape off the surface layer of the form material. , it is possible to form a rough surface. In the case of this tool, the board 1a is curved in an arc shape, so as shown in FIG.
Suitable for scraping off the surface and forming a curved rough surface that matches the curvature.

In addition, when the substrate is made of wood, it is appropriate to use Himekomatsu wood, which is used in the manufacture of wood, and when it is made of synthetic resin, it is appropriate to mold it from polyethylene or polypropylene. This is because these materials bite into the male thread of the processing pin well, and even if the amount of protrusion of the processing pin from surface 1a of the board is reduced, it holds the processing pin strongly enough and prevents the processing pin from wobbling during use. It is.

<Effects of the invention> As is clear from the above, the tool of the invention scratches and removes the surface layer of the foamed resin mold material with the tip of the rigid machining pin protruding from the surface 1a of the substrate, and removes the rough surface. form. Therefore, the force applied by hand to the tool is directly transmitted to the tip of the pin, and the magnitude of the force can scratch the surface of the mold material to form a rough surface, similar to a wire brush. Very easy to use as there is no need to adjust the force.

By adjusting the amount of protrusion of the processing pins from the surface of the substrate, the depth of the surface layer to be scraped can be made almost constant, and by making all the processing pins protrude, a rough surface with fine irregularities can be formed. It is also possible to retract some of the processing pins from the surface of the substrate and scrape away the surface layer with only the remaining processing pins to form a rough surface with rough irregularities or to change the texture of the rough surface.

[Brief explanation of the drawing]

Figure 1 is a partially sectional side view of an embodiment of the tool of the present invention, Figure 2 is a plan view of one half of the tool in Figure 1 seen from above and the other half from below, and Figure 3. 4 is a perspective view of another embodiment of the tool of the present invention, and FIG. 4 is a side view of the tool of FIG. 3 in a partially sectional state in use. In the figure, 1 is the board, 2 is the processing pin, 3 is its axis,
4 indicates a sharp tip, 5 indicates a male screw, and 6 indicates a head.

Claims (1)

[Scope of utility model registration request] The board is longer than the thickness of the board and has a pointed tip,
A method for forming a molded material made of foamed resin, characterized in that processing pins each having a shaft with a male thread on the outer periphery are screwed through at a predetermined arrangement, and the sharp tip of the shaft of each processing pin protrudes from one side of the substrate. Surface forming tool.