JPH05761A - Safe cutter easy to install - Google Patents

Abstract

PURPOSE:To obtain a safe cutter which is safe and has the superior cutting performance even in a wasted state, by cutting a slit where the intrusion of fingers from a half folded part is prevented, on a rigid plate having elasticity, cutting the edge part opposed to the half folded part into a cutter form, carrying out polishing, and carrying out hardening if necessary, and forming a cutting edge by the inward bending so as to be exposed on the bottom part of the slit. CONSTITUTION:A narrow slit 5 into which the intrusion of fingers from a half folded part 2 is prevented is cut on a rigid plate 1 which possesses elasticity and forms the first and second surfaces 3 and 4 through the half folded part 2. The edge part opposed to the half folded part 2 of the first surface 3 is cut to a cutter form, and polished, and quenched if necessary, and a cutting edge 6 is formed by the inward bending from an inward folded line 76 so as to be exposed on the bottom part of the slit 5. Accordingly, the installation of a narrow width article such as ribbon into a distribution container is facilitated and productivity is improved, and safety is secured even in the wasted state in single form, and the cutting edge can be polished by using a rotary grinder having a flat surface, and a safe cutter having the superior cutting performance and easy installation can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a sharp cutter that can be attached to a distribution container for narrow articles such as strings, ribbons, and tubular plastics, and can be touched by fingers alone or in a scattered or broken state. The present invention relates to an easy-to-install safety cutter that is easy to install and easy to install in a distribution container without fear of injury.

[0002]

2. Description of the Related Art Conventionally, as a cutter to be attached to a long narrow container such as a cord or a strip, the blade edge of a razor is sandwiched between two paperboards having slits at the same position, and the blade edge is placed at the bottom of the slit. The one attached to the opening of the slit was used. This cutter is a safe and sharp cutter, in which the finger does not directly touch the cutting edge in the state of use and the object to be cut may be inserted into the slit for cutting.

However, when the container is discarded after use, the cutter separates from the container, and when it further contains water, the surrounding paperboard may be easily peeled off, and the razor blade may be directly exposed, resulting in injury. , I was worried about supplying in large quantities.

[0004]

As a safe tool even if only the cutting edge is exposed after use, a punch provided with a slit in a metal plate and punched to provide the cutting edge at the bottom of the slit. Means using blades were also considered.

However, since the press blade is not sharp and has a problem as a product, it is necessary to further polish the press blade to improve the sharpness. Since the polishing site is at the bottom of the narrow slit during polishing, it is not possible to contact the cutting edge even with a rotating grindstone consisting of a flat surface, and it is necessary to polish one by one using a round bar-shaped abrasive, which improves productivity. It was too low for practical use. Therefore, there is a demand for a highly productive cutter that is sharp and safe even when it is discarded alone, and that can sharpen the cutting edge using a rotating grindstone made of a flat surface and that can be easily attached to a distribution container. It was

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and the structure thereof is such that an elastic rigid plate forming a first surface and a second surface through a double-folded portion is formed from a double-folded portion. Engrave a slit that does not allow fingers to enter, cut the end of the first surface that faces the two-folded portion into a blade shape, polish it, quench if necessary, and bend inward so that it is exposed at the bottom of the slit. It is characterized in that a cutting edge is formed.

The material of the cutter of the present invention is not particularly limited to a tin plate, a stainless plate, a steel plate, a plastic plate, etc., and it is folded in two and sandwiched between the edges of a distribution container having rigidity itself and a certain thickness. Any material may be used as long as it has elasticity so that it will not easily come off when it is attached.

In manufacturing the safety cutter of the present invention, (1) a rigid plate such as a steel plate is cut into a ribbon shape. (2) An inner fold line (two-folded portion) is provided in the central portion of the ribbon-shaped rigid plate in the lengthwise direction, and is divided into a first surface and a second surface. (3) A large number of slits are provided at equal intervals symmetrically with respect to the folded portion. The slit has the widest width at the folded portion. (4) An inward folding line is provided outside the slit on the first surface. (5) A piece facing the two-folded portion of the first surface is cut into a blade shape, preferably polished, and more preferably this portion is quenched. (6) Cut the slits adjacent to each other and the central portion of the slits.

The steel plates (1) and (3) can be cut at the same time, and in the case (1), the first surface side can be cut obliquely to simultaneously cut into a blade shape. Furthermore (2) and (4)
The inward folding line can also be formed at the same time as cutting by slightly changing the shape of the die. If the inner fold line of (4) is slightly inclined with respect to the slit length direction, the cutting effect is improved. The blade shape in (5) may be formed after the cutting in (6), but in general, it can be more efficiently performed before cutting. Furthermore, it is not necessary to carry out the polishing and quenching steps on all the edges of the first surface,
In particular, it is sufficient to apply it near the extension line of the slit. The formation of the blade shape in (5) may be the same as in the cutting in (1).
The above manufacturing process is one example, and variations in manufacturing process do not affect the technical idea of the present invention.

By bending the inward folding line of the first surface of the piece cut in this way inward and then folding the two-folded portion inward, a cutter having the shape shown in FIG. 1 is obtained. In this case, since the blade portion is stored inside the two rigid plates, the blade edge is exposed when it is discarded when the two rigid plates are damaged, and at this time, the blade edge has already been removed. After being dull, there is no risk of injury.

[0011]

According to the present invention, the slit is punched in the rigid plate, the inner folding line is engraved in advance, and the part to be the cutting edge is polished or hardened as necessary,
A safe cutter can be manufactured mainly by punching and bending operations.

Since the cutter according to the present invention is sandwiched between two rigid plates obtained by bending, it is safe even after it is discarded and rusted or damaged. In addition, the manufacturing process is extremely simple, and the material used is not limited to one, and when it is attached to a distribution container, it can be easily attached by simply sandwiching it at the necessary end of the distribution container. . After mounting, the stress due to cutting is applied only in the direction that pushes the cutter deeply into the end of the distribution container, so there is no risk of it coming off during use.

[0013]

FIG. 1 is a perspective view showing an embodiment of the present invention,
FIG. 2 is an explanatory diagram showing an example of a method for manufacturing a safety cutter. Reference numeral 1 is a cutter made of a tin plate, and 2 is a double-folded portion bent along an inner folding line. 3 is a first surface and 4 is a second surface. The first surface 3 and the second surface 4 were aligned to form the slit 5. Therefore, the slit 5 forms one deep groove as the entire cutter.
6 is a blade edge exposed at the bottom of the slit 5,
It can be formed by bending the surface 3 of the inside of the first surface and the inside of the second surface along the inner folding line 7. At this time, the inner fold line 7 needs to be a portion where the cutting edge 6 is exposed at the bottom of the slit 5. Further, it is preferable that the cutting edge 6 is slightly inclined with respect to the depth direction of the slit in terms of sharpness.

FIG. 2 shows a state in which a metal plate is cut into a ribbon shape as an example of the manufacturing process. Half-folded part 2 is 2 in the center
The cutting edge 6 provided on the first surface 3 is shown by a dotted line, and the slit 5
The inward folding line 7 for exposing the bottom of the is also shown by a two-dot chain line. The slit 5 is symmetrical with respect to the folded part 2. 8
Is a cutting line for cutting into individual cutters 1. 9
Is a notch formed at the end of the cutting line 8 of the first surface 3,
It is possible to prevent a phenomenon in which the end portion of the first surface protrudes from the side portion of the cutter when the inner folding line 7 is bent at an angle. Reference numeral 10 represents a polished surface of the cutting edge, and the edge line of the first surface 3 cut in the cutting edge shape was further polished with a file to improve the cutting force.

FIG. 3 is a perspective view showing a state in which the cutter according to the present invention is attached to a cord-shaped material distribution container. Reference numeral 11 is a distribution container, 12 is a string-like object, and 13 is a stenosis extraction hole. By forming a vertically long narrow groove in the portion of the distribution container 11 to which the cutter is to be attached, and by inserting the cutter 1 of the present invention from above, the distribution container 11 can be formed by the elasticity of the material without using an adhesive. It was in close contact with the edge of the cutter, and the force of inserting the cutter 1 into the edge of the distribution container worked every time the product was used repeatedly, and the cutter 1 did not fall off or slip.

[0016]

EFFECTS OF THE INVENTION According to the present invention, it is easy to install in a distribution container, has high productivity, is safe even when it is discarded alone, and can sharpen the cutting edge by using a rotary grindstone made of a flat surface, resulting in sharpness. It is possible to provide a safety cutter that is easy to install and has good performance.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of a method for manufacturing a safety cutter.

FIG. 3 is a perspective view showing a state in which the cutter of the present invention is attached to a distribution container of a string-like object.

[Explanation of symbols]

1 cutter 2 Folded part 3 First side 4 second side 5 slits 6 cutting edge 7 Inward line 8 cutting line 10 Polished surface of the cutting edge 11 distribution containers 12 Strings

Claims (2)

[Claims] 1. A rigid plate having elasticity that forms a first surface and a second surface via a two-folded portion is provided with a slit that does not allow fingers to enter from the two-folded portion, and a two-folded portion of the first surface is formed. An easy-to-install safety cutter characterized by forming a cutting edge by bending inward so that opposite ends are exposed at the bottom of the slit. 2. An elastic metal plate forming a first surface and a second surface via a double-folded portion is provided with a slit that does not allow fingers to enter from the double-folded portion, and a double-folded portion of the first surface is formed. An easy-to-install safety cutter characterized by cutting the opposite ends into a blade shape, polishing, quenching if necessary, and bending inward so that it is exposed at the bottom of the slit.