JP3956141B2 - Terminal cutting tool to connect pencil - Google Patents

Description

  The present invention relates to a tool for cutting the tip of a pencil into a concave conical shape.

  Traditionally, pencils were thrown away when they were shortened by use and could not be sharpened with a pencil sharpener. Even if it was cut with a cutting knife, it could not be used up completely, and there was a problem in resource saving. Alternatively, there is a “terminal-shaped pencil that connects and connects a shortened pencil and its cutting method”. (See Patent Literature).

  JP 2003-063191 A

The present invention relates to a method for completely using a shortened pencil and a tool therefor. Japanese Patent Application Laid-Open No. 2003-063191 provides a method for completely using a shortened pencil and a tool therefor, and the pencil terminal is cut in a direction perpendicular to the side of the pencil. Therefore, the pencil often tears in the vertical direction and the cut part is often missing, which is not a complete method. In addition, two cutting tools that are connected to each other and cut into different terminal shapes are necessary, and it cannot be said to be a simple and inexpensive tool.
The present invention has been made to solve these problems.

Means to solve the problem

  A cone-shaped cutting tool fixed to keep the smoothness of the slope, or a cone-shaped cutting tool fixed to maintain the smoothness of the slope along the slope of the multi-faceted cutting cone or cone-shaped body with three or more faces. Fix the conical cutting tool that is fixed by taking out the cutting blade from the groove opened along the center of the pedestal, and put it in the cylinder without touching the cutting tool, and fix the cylinder and pedestal so that they do not move. . A pencil for cutting the terminal is put in a cylinder, and the pencil or cutting tool and pedestal are rotated to cut the tip of the pencil into a concave cone.

  A general pencil whose tip has already been cut into a conical shape and a pencil that has been cut into a concave conical shape are fitted and connected via an adhesive. The convex cone shape and the concave cone shape need to be the same shape in the forward and reverse directions. Also, it is desirable to join pencils with the same external shape.

The invention's effect

  Since the method of cutting the tip of the pencil is a method in which the tip of the pencil is scraped off little by little in the longitudinal direction of the pencil, the tip of the pencil does not break or chip.

  This is a tool and a tool that has the effect of completely eliminating resources and waste that can be used up completely without throwing away a part of a pencil with a conical tip already in use.

  Color pencils can be used completely without waste, especially for watercolors.

  It is an inexpensive stationery that can be used safely even by small children and requires only a small amount of adhesive.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to examples.
FIG. 1 is an enlarged vertical cross-sectional view in a state where the cutting tool is a four-sided cutting pyramid 1 and is embedded in the center of the base 3 without being in contact with the pencil insertion cylinder 5. A cutting tool shaft 2 extending from the center of a four-sided cutting cone 1 for cutting a pencil end into a concave cone shape is embedded and fixed in the center of a cylindrical base 3. The outer shape of the pedestal is not necessarily cylindrical. A pencil insertion cylinder 5 into which the four-sided cutting cone 1 enters the pedestal recess 4 of the pedestal 3 without contact is accommodated. The outer shape of the pencil insertion cylinder 5 and the inner shape of the base recess 4 are cylindrical in the case of FIG. 1, but are not necessarily the same. However, when the pencil insertion tube 5 and the pedestal 3 are combined, a part of the convex portion 7 of the pencil insertion tube 5 enters the fitting hole 6 formed in the pedestal 3 and moves in the lateral rotation direction. Keep it away. There may be multiple places.

  FIG. 2 is a plan view seen from the top of FIG. 1, but the four-sided cutting cone 1 may be a three-sided cutting cone.

  Further, as shown in FIG. 3, the cutting blade 9 is slightly protruded from the inclined surface of the conical body 8 in a shape along the inclined surface, and the thickness of the cutting blade 9 is cut and embedded, and further conical. It is good also as the cone-shaped cutting tool 10 processed and maintained with the fastener 11 so that the shape and surface smoothness may be maintained.

  FIG. 4 shows that the conical shaped body 8 is partially hollowed out of the conical shaped cutting tool except for the connecting portion of the cutting tool shaft 2, and a slot 12 is formed along the outer conical slope. The cutting blade 9 is slightly exposed to the outside of the cone, the cutting blade 9 is fixed to the inside by a fastener 11 along the conical slope, and the head of the fastener is made smooth following the cone shape. It is a side view of the shape cutting tool. Alternatively, the main body of the cutting blade 9 is embedded in the inside of the conical shape with a hardened resin or the like, leaving a cavity in which chips when the tip of the pencil is cut into a concave shape enters the groove and falls, and the cutting blade 9 is fixed. . The cutting tool shaft 2 is either integrated with the hollow cone-shaped cutting tool 13 leaving a hole for pencil cutting waste, or the pencil cutting with which the circular hollow cone-shaped cutting tool 13 and the cutting tool shaft 2 do not move. Tighten it with another fixing tool to which trash will fall. As described above, when the pencil is cut, cutting waste enters from the slot 12 and the pencil can be easily cut.

  A four-sided cutting cone 1, a three-sided cutting cone, or a conical cutting tool 8 or a hollow cone-shaped cutting tool 13 is placed in a pencil insertion cylinder 5, and the cutting tool shaft 2 is embedded in the center of the base 3 through an adhesive or the like. Fix it. Further, the cutting tool shaft 2 is not a cylinder but a prismatic shape. Alternatively, when the tip 3 is made larger than the shaft diameter or the base 3 made of thermoplastic hard plastic is obtained by injection molding with an L shape or the like, if it is embedded at the same time, it can withstand the permanent use of rotary cutting of the pencil.

  The pencil insertion cylinder 5 only needs to have a gap in which a pencil can enter and rotate. The pencil cutting waste accumulates in the pedestal recess 4 from the gap or from the inside of the cone-shaped body 8 when the hollow cone-shaped cutting tool 13 is used. The pencil insertion cylinder 5 and the base 3 are separated and the cutting waste is discarded.

  The four-sided cutting cone 1 and the like, the cutting blade 9 and the cutting tool shaft 2 are made of steel, but the other conical cutting tool 10, the hollow conical cutting tool 13, the pencil insertion cylinder 5 and the pedestal 3 are made of a hard material such as plastic. Use wood. The cutting tool shaft 2 may be the same hard plastic or the like depending on the material of the conical cutting tool.

  The cylindrical pencil cut into the concave conical shape 14 has a mutual shape that fits with the cylindrical pencil 16 already cut into the convex conical shape 15 as shown in the side view of the pencil joint in FIG. It is necessary to be. Pencil bonding can be done with wood-based adhesives or instant adhesives, and can be easily cut with a pencil sharpener. There will be no.

  It is possible to join and connect circular pencils and hexagonal pencils having different external shapes.

It is a longitudinal cross-sectional view in the center of the Example which uses a cutting tool as a four-sided cutting cone. It is the top view seen from the upper surface of FIG. It is a side view of the Example of the cone-shaped cutting tool which attached the cutting blade to the slope. It is a side view of the Example of the hollow cone-shaped cutting tool which took out the cutting blade from the inside of a conical slope, and fixed the cutting blade inside. It is a side view which shows the joining relationship of the convex cone shape of a cylindrical pencil tip, and a concave cone shape.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Four-surface cutting cone 2 Cutting tool shaft 3 Base 4 Base recessed part 5 Pencil insertion cylinder 6 Fitting hole 7 Convex part 8 Cone-shaped body 9 Cutting blade 10 Cone-shaped cutting tool 11 Fastener 12 Groove hole 13 Cavity cone-shaped cutting tool 14 Conical shape of concave 15 Conical shape of convex 16 Cylindrical pencil

Claims (1)

  A cylindrical body and a pyramid with a cutting blade along the slope, a cone-shaped cutting tool with a cutting blade along the slope, or a cutting blade from the groove opened along the slope are attached. A cutting tool for cutting the end of a pencil into a concave conical shape by fixing the hollow conical cutting tool in a pedestal for receiving the hollow conical cutting tool.

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