JP3105029U - chisel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engraving sword that gives gorgeousness to a handle and is easy to use.
SOLUTION: The chisel 11 comprises a blade body 17, a handle 15 having the blade body 17 attached to one end thereof, and a cap 18 attached to the other end of the handle 15. The handle 15 is formed by double molding in which the cover 14 is injection-molded on the integrally formed core 13. The core 13 is formed of polycarbonate, which is a transparent hard resin, and the cover 14 is formed of an elastomer, which is an opaque soft resin. The core 13 is entirely covered with the cover 14 except for the first exposed portion 22, the second exposed portion 23, and the third exposed portion 24. This allows the inside of the core body 13 to be seen through the first exposed portion 22, the second exposed portion 23, and the third exposed portion 24, so that the gorgeousness of the entire handle 15 is improved.
[Selection diagram] Fig. 1

Description

  The present invention relates to a chisel, and more particularly, to a chisel having a handle formed of a synthetic resin.

  2. Description of the Related Art Conventionally, many swords used as teaching materials for elementary schools have been replaced with wooden patterns instead of synthetic resin patterns. Such a synthetic resin handle is obtained by double molding in which a hard resin core of ABS resin is almost entirely covered with a soft resin such as an elastomer as disclosed in Japanese Utility Model Laid-Open No. 23799/1994. There are many. Therefore, the rigidity of the entire handle is increased, and the handle of the chisel is hard to slip at any position with respect to the handle.

  In the conventional chisel as described above, the soft resin is often opaque due to its material properties, and this covers almost the entire handle, and thus lacks the gorgeousness of the handle. Further, even if the hard resin is an ABS resin, the transparency is not high because it is an ABS resin, and the impression of the entire chisel has been sober because the exposed portion required for double molding is small.

  This invention has been made to solve the above-mentioned problems, and an object of the invention is to provide a chisel which gives the handle a gorgeousness and is easy to use.

  In order to achieve the above object, the invention according to claim 1 is a chisel, in which the blade is integrally formed of a transparent hard resin, and the blade is attached to an end thereof. A core body composed of a body and a protrusion protruding outward with respect to the body, and an opaque soft resin that covers the body and covers the core so that the outer surface of the protrusion is exposed. And a coating.

  With this configuration, the handle of the chisel is composed of a transparent hard resin and an opaque soft resin.

  According to a second aspect of the present invention, in the configuration of the first aspect, the hard resin is made of polycarbonate and the soft resin is made of an elastomer.

  According to a third aspect of the present invention, in the configuration of the first or second aspect, the core body has a hollow portion in which the inside extends in the axial direction.

  With this configuration, the weight of the core body is reduced.

  According to a fourth aspect of the present invention, in the configuration of the first aspect, at least a part of the projection has an outer surface having a shape corresponding to the blade shape of the blade body. .

  With this configuration, the convex portion having a shape corresponding to the blade shape is exposed from the covering.

  According to a fifth aspect of the present invention, in the configuration of the first aspect, the ratio of the total area of the outer surface of the projection to the total area of the outer surface of the cover is 1: 2. ~ 2: 3.

  With such a configuration, the ratio of the outer surface of the transparent hard resin to the handle increases.

  As described above, in the device according to the first aspect of the invention, the handle of the chisel is made of a transparent hard resin and an opaque soft resin, so that the chisel has a gorgeous atmosphere. Further, the combination of the transparent color and the opaque color can indicate the type of the blade, so that the usability is improved.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the rigidity of the core body is increased, and the feel of the cover is improved, so that the reliability in use is improved.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, the weight of the core body is reduced, so that the weight of the entire chisel becomes lighter and the usability is improved.

  The invention according to claim 4 has, in addition to the effect of the invention according to any one of claims 1 to 3, a convex portion having a shape corresponding to the blade shape is exposed from the covering body, so that the type of the blade edge is a handle. Can be easily determined from the above.

  The invention according to claim 5 is, in addition to the effect of the invention according to any one of claims 1 to 4, furthermore, because the ratio of the outer surface of the transparent hard resin occupying the handle to the handle becomes larger, the glamor of the chisel is increased. Is more improved.

  FIG. 1 is a perspective view showing the external shape of a chisel according to a first embodiment of the present invention, and is a perspective view seen from the front of the blade, and FIG. 2 is a perspective view seen from the back of the blade. FIG.

  Referring to these figures, chisel 11 includes blade 17, handle 15 to which blade 17 is attached at its end, and cap 18 which is detachably attached to the rear end of handle 15. Have been. The handle 15 is formed of polycarbonate, which is a transparent hard resin, and the cover 14 is formed of an elastomer, which is an opaque soft resin. The handle 15 is manufactured by double molding, and a part of the core 13 is exposed as the first exposed portion 22, the second exposed portion 23, and the third exposed portion 24 from the outer surface of the cover 14. .

  The first exposed portion 22 is formed at a position away from the end of the handle 15 to which the cover 14 is attached by a predetermined amount. The second exposed portion 23 is formed in a long oval shape backward from the center of the handle 15. The shape of the outer surface of the third exposed portion 24 is adapted to the shape of the cutting edge of the blade body 17 attached to the handle 15. Although the ratio of the total area of these exposed portions to the outer surface of the coating is relatively large, the ratio is 1: 2 to 2: 3 in order to emphasize the gorgeousness of the pattern. It is preferable to be within the range.

  A plurality of star-shaped convex patterns 20 which also serve as a non-slip are formed integrally with the covering body 14 at a portion of the covering body 14 closer to the blade body 17 than the first exposed portion 22. Thus, in addition to the characteristics of the soft resin constituting the cover 14, the formation of the convex pattern 20 enhances the anti-slip effect when the chisel 11 is used.

  FIG. 3 is a diagram showing the external shape of the core body 13 shown in FIG. 1, and is a perspective view seen from the direction corresponding to FIG. 1, and FIG. 4 is a perspective view seen from the direction corresponding to FIG. FIG. 5 is a sectional view taken along line VV shown in FIG. The figure shows a state in which the cap 18 is attached to the core 13.

  Referring to these figures, core body 13 is formed by injection molding of polycarbonate as a hard resin. Its external shape is composed of a rod-shaped body 26, and first, second, and third protrusions 31, 32, and 33 projecting outward on the outer surface of the body 26.

  As shown in FIG. 5, a hollow portion 29 in a hollow state extending in the axial direction of the body portion 26 is formed inside the body portion 26 constituting the core 13. As a result, the overall weight of the core 13 is greatly reduced. The hollow portion 29 has an open end at the rear end, and the opening is closed by attaching the cap 18 to the body portion 26.

  On the other hand, a blade mounting hole 28 reaching the hollow portion 29 is formed at the front end of the body portion 26. The blade mounting hole 28 is formed for press-fitting the blade body 17 and fixing it to the core body 13 in the final step.

  The core 13 is configured as described above. Next, a process of forming the cover 14 on the core 13 will be described below.

  A cap 18 is fitted and attached to the end of the core body 13 formed by integral molding. In this state, the core 13 is supported on a mold for forming the cover 14 by using the first convex portion 31, the second convex portion 32, the third convex portion 33 and the outer surface of the cap 18. And fix it. Next, in this state, an elastomer, which is a soft resin, is injected into the inside of the mold. As a result, the core 13 is entirely covered with the elastomer except for the outer surfaces of the first protrusion 31, the second protrusion 32, the third protrusion 33, and the cap 18. When the injection and molding of the elastomer are completed and the molded product is taken out from the mold, the handle 15 and the cap 18 to which the blade body 17 is not attached in FIG. 1 are completed. The chisel 11 is completed by press-fitting and fixing the blade body 17 toward the blade mounting hole 28 formed in the core body 13 with respect to the end of the handle 15 thus formed.

  In the completed chisel 11, the outer surfaces of the first convex portion 31, the second convex portion 32, and the third convex portion 33 become the first exposed portion 22, the second exposed portion 23, and the third exposed portion 24, and the outer surface is formed. Will appear on the side. Since the core body 13 is formed of a transparent hard resin as described above, the inside can be seen through the outer surfaces of the first exposed portion 22, the second exposed portion 23 and the third exposed portion 24, and the second exposed portion Since the ratio of closing the handle 23 is relatively large, the chisel 11 is gorgeous. In this case, the gorgeousness of the handle 15 can be further improved by forming the core 13 in a state where not only a transparent soft resin is used for the core 13 but also metal powder and the like.

  Since the chisel according to the present embodiment is configured as described above, by selecting and combining the transparent color of the core and the opaque color of the cover, for example, the type of the chisel blade can be displayed. Usability is further improved. In this case, it is conceivable to prepare a plurality of transparent colors and make one opaque color, or to make one transparent color and make a plurality of opaque colors.

  As described above, since the hollow portion 29 is formed inside the core body 13 from a position away from the front end by a predetermined distance to the rear end, the center of gravity of the entire handle 15 moves to the blade body 17 side. In addition, since the overall weight is reduced, the usability of the chisel 11 is further improved.

  By the way, although nothing is contained in the hollow portion 29 formed inside the core 13, it is easy to fill a predetermined amount of liquid, particles and the like having a different color from the core 13. In this case, it is possible to visually recognize the moving state of the chisel 11 through the second exposed portion 23 of the core 13 or the like when the chisel 11 is used. Thereby, the hobby is further improved together with the gorgeousness due to the transparency of the core 13.

  In the above embodiment, polycarbonate is used as the hard resin, and estramer is used as the soft resin. However, any other resin may be used as long as the resin has the same characteristics as these. Needless to say.

  Further, in the above embodiment, the hollow portion is provided in the center of the inside of the core body, but this hollow portion is not necessarily required. In that case, a cap to be attached to the end of the core body may be unnecessary.

  Further, in the above-described embodiment, the exposed shape and the exposed location of the core body with respect to the cover are specified, but it goes without saying that other exposed shapes and other exposed locations may be used.

It is the figure which showed the external appearance shape of the chisel according to the 1st Embodiment of this invention, and was seen from the front. It is the perspective view which looked at the chisel shown in FIG. 1 from the back. FIG. 2 is a perspective view showing an external shape of a core used in the chisel shown in FIG. 1, as viewed from a direction corresponding to FIG. 1. FIG. 4 is a perspective view of the core shown in FIG. 3 as viewed from a direction corresponding to FIG. 2. FIG. 5 is a sectional view taken along line VV shown in FIG. 3.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 11 ... Chisel 13 ... Core 14 ... Coating body 17 ... Blade body 22 ... First exposed part 23 ... Second exposed part 24 ... Third exposed part 26 ... Body part 29 ... Hollow part 31 ... First convex part 32 ... 2nd convex part 33 ... 3rd convex part In addition, the same code | symbol in each figure shows the same or equivalent part.

Claims (5)

A chisel,
Blade body,
A core body formed integrally with a transparent hard resin, the blade body including a rod-shaped body portion attached to an end thereof and a convex portion protruding outward with respect to the body portion;
A chisel which is made of an opaque soft resin and covers the body and covers the core so that an outer surface of the projection is exposed. The chisel according to claim 1, wherein the hard resin is made of polycarbonate, and the soft resin is made of an elastomer. 3. The chisel according to claim 1, wherein the core has a hollow portion in which the inside extends in the axial direction. 4. The chisel according to any one of claims 1 to 3, wherein at least a part of the convex portion has an outer surface having a shape corresponding to a blade shape of the blade body. The chisel according to any one of claims 1 to 4, wherein a ratio of a total area of an outer surface of the convex portion to a total area of an outer surface of the cover is 1: 2 to 2: 3.

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