JPS6342943Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The present invention relates to a knife for cutting into paint films and other thin materials, and is particularly useful for cutting paint films into required dimensions for film testing, or cutting paper, film sheets, etc. The present invention provides a cutting knife that is most suitable for use when cutting into strips for decorative purposes.

BACKGROUND ART AND PROBLEMS The outer surfaces of various articles and machinery and equipment are usually painted. A checkerboard test is a method for measuring the adhesion strength of a coating film formed by this coating finish. This applies to the paint film both vertically and horizontally.
Form 11 score lines to create 100 grid lines, then firmly adhere adhesive tape, such as cellophane tape, to the coating film where the grid lines are formed, and quickly peel it off in the right angle direction to create 100 grid lines. The degree of peeling of the paint film is examined and the adhesion strength of the paint film is determined based on this.

By the way, in the case of such adhesion strength tests of paint films, conventionally, a cutter knife, that is, a knife consisting of a single cutter blade, was used to cut score lines into the paint film sequentially at predetermined intervals to form a grid pattern. Ta. For this reason, the intervals between the score lines tend to vary, thereby reducing the reliability of the measured values. Also, it takes a considerable amount of man-hours and time to form 11 vertical and horizontal cut lines.
It was not desirable.

Also, when using the above-mentioned cutter knife to make strips of paper or film sheets for decorative purposes, place a ruler on the paper and run the cutter knife along the ruler. However, like the above-mentioned case of making incisions on the coating surface, this work required a considerable amount of time and effort.

Purpose of the invention The present invention was devised to correct the above-mentioned defects, and is capable of accurately making a large number of cuts in the above-mentioned coating film, film sheet, paper, etc. at once, and is easy to handle. The aim is to provide a durable cutting knife.

Summary of the invention The cutting knife according to the invention includes a plurality of cutter blades, a holding block that holds one ends of these cutter blades at a predetermined distance from each other, and a holding block that accommodates the cutter blades so as to be slidable through the holding block. Each of the cutter blades includes a holder, a guide block fixed within the holder and guiding the other ends of the cutter blades at a predetermined distance from each other, and a fixture for fixing the holding block at a desired position of the holder. , the other end of the cutter blade is guided by the guide block and is configured to protrude outside the holder;
The holder is provided with an elastic body that protects the cutter blade.

Embodiments In the following, embodiments of the present invention will be described with reference to the drawings.

1 to 8 show an embodiment of the present invention, and as is clear from FIGS. 1 to 4,
The holder 1 is formed by bending a metal plate into a substantially U-shape, and has two pairs of bent pieces 2 and 3 formed on its open upper edge. The cover 4 is attached to the holder 1 with screws 5 and 6 using the bent pieces 2 and 3. A guide block 7 is attached to the cover 4 with screws 8. Eleven slits 9 are formed in this guide block 7 at a constant pitch. Further, a pressing rubber piece 10 is attached to the cover 4 by adhering it. Further, a rubber piece 11 is adhered and fixed to the inside of the bottom of the holder 1.

Eleven cutter blades 12 are arranged inside the holder 1. These cutter blades 12 have one end formed in a slit 1 in a holding block 13.
4, and a small hole 15 is provided at one end of the blade 12. A butterfly bolt 16 is inserted into the small hole 15, passing through the portion of the block 13 where the slit 14 is formed. Both ends of this butterfly bolt 16 are connected to the holding block 13.
A notch 1 protrudes from both ends of the holder 1, and the protruding portion is formed in the opposing wall of the holder 1.
It is designed to be stored in 7. In this state, the cutter blade 12 is attached to the holder 1 by tightening the butterfly bolt 16 which is also a fixing device.
It is designed to be held at a predetermined inclination angle with respect to the main body.

In the holder 1, the cutter blade 12 has its rear end held in the slit 14 of the holding block 13, and its tip part held in the slit 9 of the guide block 7, so that the cutter blades 12 are held constant relative to each other. They will be held parallel with a distance of . Further, the upper surface of the cutter blade 12 is elastically pressed downward by a rubber piece 10, and the lower surface thereof is supported by a rubber piece 11. Note that the lower surface of the blade 12 constitutes a blade portion, and this portion is attached to the metal holder 1.
Since the blade portion is in contact with the rubber piece 11 without being in direct contact with the rubber piece 11, the blade portion is not damaged.

Next, to explain the case of making a cut in the coating film using this cutting knife, as shown in FIG. 5, for example, a panel 19 on which the coating film 18 is formed,
horizontally, and blade 1 of this cutting knife.
The tip of the blade 12 is brought into contact with the surface of the panel 19 so that the blade 2 forms an angle of about 30 degrees with respect to the horizontal plane. In this state, move the cutting knife to the fifth
Pull forcefully in the direction of arrow A in the figure. As a result, eleven horizontal incision lines 20 are formed on the surface of the panel 19, as shown in FIG. Next, 11 vertical incision lines 21 are formed on the surface of the panel 19 in the same manner. In this way, 100 coating film pieces arranged in a grid pattern are formed on the surface of the panel 19 as shown in the figure. Next, the adhesive tape is strongly adhered to the surface of this panel 19 and then quickly peeled off in the right angle direction. As a result, the coating film 18 is partially peeled off depending on the adhesion strength of the coating film, and it becomes possible to know the adhesion strength of the coating film from the peeling state of the coating film.

Note that the 11 cutter blades 12 have a seventh blade.
As shown in the figure, the grooves 2 are spaced at regular intervals.
2 is formed, and the blade 12 is split by this groove 22. In other words, if you use this cutting knife many times, the blade 1
The tip of 2 becomes dull. Then, loosen the bolt 16, bring the blade 12 forward, and make the slit 23 at one end.
By breaking off the tip of the blade 12 using a snapper 24 on which a new cutting edge is formed, a new cutting edge is exposed. This allows blade 12
It can be used many times without replacing. If the butterfly bolt 16 is moved within the notch 17 as the blade 12 becomes shorter,
The 11 blades 12 can be moved forward together with the block 13. Also, when the blade 12 is used until it becomes shorter than a predetermined length, remove the butterfly bolt 16 from the block 13 and remove the blade 12 from the block 13.
from the slit 14 and insert a new blade 1.
All you have to do is replace it with 2.

Also, when not using this cutting knife,
As shown in FIG. 8, by fitting a cover 27 made of plastic, for example, to the tip of the holder 1, the blade 12 protruding from the tip of the holder 1 can be protected and safety can be increased. .

By the way, in the above embodiment, the blade 1
The operation of holding the holder 2 at an angle of about 30 degrees with respect to the panel 19 is left to the skilled examiner who handles this instrument.As shown in FIG. A roller 26 may be attached, and the cutting knife may be moved while the roller 26 is in contact with the surface of the panel 19. In this way, the angle of the blade 12 with respect to the panel 19 can be maintained more accurately.

Effects of the invention As mentioned above, the present invention is designed to hold a plurality of cutter blades in a holder at predetermined intervals, so it is possible to form score lines for coating film tests accurately and with less man-hours. It becomes possible to do so.
In addition, when creating strips from paper, film sheets, etc., it is sufficient to simply apply the cutting knife to the paper and move it forcefully in a linear manner, thereby making it possible to obtain a large number of strips at once.

Moreover, in the present invention, one end of a large number of cutter blades is held by a holding block, and the other end is guided by a guide block provided in a holder. Even when sliding freely, the spacing between each cutter blade is always maintained accurately. Therefore, there is no possibility that the cut of the cutter blade will be inaccurate.

Furthermore, since the cutter blade is simply guided by a guide block fixed in the holder so that the other ends thereof are spaced apart from each other by a predetermined distance, the amount of protrusion of the tip of the cutter blade after the tip is broken off is limited. When adjusting or replacing the cutter blade, there is no need to remove or attach the guide block from the cutter blade by loosening or tightening fixing tools such as mounting bolts. Therefore, handling and using the incision knife according to the present invention is extremely simple and easy.

Furthermore, since the holder is provided with an elastic body that protects the cutter blade, damage to the cutter blade can be effectively prevented.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of an embodiment of a cutting knife to which the present invention is applied, Fig. 2 is a plan view of the same, Fig. 3 is a side view of the same, Fig. 4 is a front view of the same, and Fig. 5 is a front view of the same. The figure is a vertical cross-sectional view of the main parts of the same as above, showing the state of use.
The figure is a plan view of the panel with the cut line formed by the cutting knife shown in Figure 1, Figure 7 is a side view of the same panel showing the operation of breaking off the tip of the blade, and Figure 8 is the cover attached. FIG. 9 is a side view of a main part showing a modification of the above embodiment. In addition, in the symbols used in the drawings, 1...Holder, 7...Guide block, 9...Slit, 1
2... cutter blade, 13... holding block,
14...Slit.

Claims (1)

[Scope of utility model registration request] a plurality of cutter blades, a holding block that holds one ends of these cutter blades at a predetermined distance from each other, a holder that slidably accommodates the cutter blades through the holding block, and a holding block that is fixed within the holder and that holds the cutter blades at a predetermined distance from each other. The cutter blade is provided with a guide block for guiding the other ends of the blades at a predetermined distance from each other, and a fixture for fixing the holding block at a desired position of the holder, and the other end of the cutter blade is attached to the guide block. The cutting knife is configured to project outside the holder while being guided by the cutter blade, and the holder is provided with an elastic body for protecting the cutter blade.