JP2602741Y2 - Seal - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal having a main body made of precious metal and using a stamp material or a noble metal for a stamp surface.

[0002]

2. Description of the Related Art Box seals, ivory, buffalo, crystal, and the like have been used as materials for seals, particularly personal seals and bank seals. Of these, ivory is the best, but in the future it will be very difficult to obtain ivory, so you must rely on other materials.

[0003] On the other hand, a seal is rarely made of a precious metal such as gold, silver or platinum, but it is expensive and not suitable for general use, and is heavy and difficult to use. Only done in form. However, precious metals have moderate flexibility and elasticity,
Since it also has corrosion resistance, it should be suitable as a seal material as long as the above-mentioned price and weight problems can be solved.

[0004]

[Problem to be solved by the invention] The object of the invention is to form an outer shell of a noble metal from such a viewpoint, and to use a common boxwood or buffalo horn on the stamp face, or use a noble metal. Another object of the present invention is to provide an inexpensive, relatively lightweight and easy-to-use seal.

[0005]

The basic aspect of the seal according to the present invention is a gourd shape in which the middle part (12) is obtained by precision casting or electroforming of a noble metal as shown in FIG. The top part (11) is closed inside the hollow shell (1) with the bottom part (13) opened, as shown in FIG. 2, and the stamp face piece part (21) and the support pillar part (22) are integrally formed. And the outer shape of the stamp face piece portion (21) is the bottom portion of the outer shell (1).
3) Fits to the inner shape of
As shown in FIG. 3, the stamp material (2) having a shape in which the outer shape of (22) fits into the inner shape of the constricted portion (12) of the outer shell is supported by the stamp face piece portion (21). The end on the side of the pillar portion (22) is fixed so as to be supported by the constriction from the bottom (13) of the outer shell toward the middle (12), and the exposed surface of the stamp is stamped (3).

As the stamp material (2), a commonly used stick material or a commonly used buffalo horn is used. For fixing to the outer shell (1), as shown in FIG. 3, an appropriate adhesive (4) is applied between the outer surface of the stamped piece (21) and the inner surface of the outer shell bottom (13), or the support pillar portion. What is necessary is just to apply between the outer surface of (22) and the inner surface of the constricted part (12), or both.

As shown in FIG. 1, a modified form of the seal according to the present invention is a gourd-shaped body with a narrow neck formed by precision casting or electroforming of a noble metal, wherein the top (11) is closed and the bottom is closed.
As shown in FIG. 2, a stamp face piece portion (21) and a support pillar portion (22) are integrally formed in a hollow outer shell (1) having an opening (13). The outer shape of (21) fits into the inner shape of the bottom (13) of the outer shell, and the outer shape of the support column portion (22) matches the inner shape of the constricted portion (12) of the outer shell. As shown in FIG. 4, the stamp material (2) having a shape to be fitted is connected to the support pillar portion (22) side of the stamp surface piece portion (21) in the middle from the bottom (13) of the outer shell (12). It is fixed so as to be supported by a constriction toward the front, and a precious metal plate (5) having a mark (3) on the exposed surface of the stamping material is fixed.

In any of the above embodiments, when a noble metal selected from a gold alloy, a platinum alloy, and a silver alloy is used, the outer shell (1) can be manufactured by precision casting. Since the noble metal having a high purity is too soft, it is preferable that the noble metal is alloyed with copper, palladium, zinc or the like as long as it has appropriate strength and retains the noble metal likeness. For gold, a range of K14 to 20, particularly K18, is suitable. Platinum is suitably added with some palladium, and silver is suitably alloyed with about 10% zinc. According to the lost wax method, it is possible to obtain a casting having a thin portion with a thickness of about 1 mm.

When a noble metal selected from gold, platinum and silver is used, the outer shell (1) is formed by electroforming.
Can be manufactured. According to the electroforming method, 400 μm
Within this range, it is possible to obtain a product of any thickness without requiring an excessively long time. The outer shell of the seal of the present invention is generally 100 to 200 μm,
Typically, an electroformed thickness of 150 to 160 μm is appropriate. Since the surface of the electroformed product is generally rough and not glossy, the entire outer surface or a part thereof is polished to a glossy surface if desired. In this case, it is needless to say that electroforming is one type of plating, so there is a limitation on the use of alloys. On the other hand, electroforming of two or more metals can be repeated.

[0010] The same applies to the precious metal plate to be engraved in the variant of FIG.

[0011]

In the illustrated example, the stamp face piece is completely inserted into the inside of the open end of the outer shell of the noble metal, and the open end is used as the outline of the mark. Of course, the outline can be formed on the stamp face piece, but the appearance as shown in the figure is better in appearance and the seal is easy to use. To match the opening end of the outer shell and the stamp face piece, one of the protruding sides may be ground.

When the sealer uses the seal, the force applied by the sealer is larger than expected when actually measured, and not only the buckling direction but also the tightening and bending stresses act. Therefore, in the present invention, the difference in diameter is about 0.5 mm by inserting a stamping material with a supporting pillar part with a thickness just suitable for the diameter inside the outer shell. Countered these stresses. Thereby, even a hollow body having a relatively small thickness can have the strength required for a seal.

[0013]

[Effect of the Invention] The seal of the present invention uses a small amount of expensive and heavy precious metal to form an outer shell, utilizes the characteristics of the precious metal, and improves the ease and ease of use as a seal by using a regular stamp material. Secured by use. Precious metals have unique softness and elasticity and high corrosion resistance. By using a hollow body, the weight can be reduced to 1/10 or less as compared with the conventional Muku precious metal stamping material, and the price can be reduced accordingly.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of an outer shell of a seal of the present invention.

FIG. 2 is a longitudinal sectional view similar to FIG. 1, showing an example of a stamp material of the seal of the present invention.

FIG. 3 is a longitudinal sectional view showing a state where the stamping material of FIG. 2 is fixed in the outer shell of FIG. 1 and engraved;

FIG. 4 is a view similar to FIG. 3, showing a modification of the seal of the present invention.

[Explanation of symbols]

1 outer shell 11 top 12 middle (constricted part)
13 Bottom part 2 Stamping material 21 Stamping piece part 22 Support pillar part 3 Engraving 4 Adhesive 5 Precious metal plate

Claims (5)

(57) [Scope of request for utility model registration] 1. A hollow outer shell (1) obtained by precision casting or electroforming of a noble metal, wherein the middle shell (12) is a constricted gourd shape, the top (11) is closed and the bottom (13) is open. Inside, a stamping piece (21) integrally formed
And a support pillar portion (22), and a stamp face piece portion (21)
The outer shape of the outer shell fits the inner shape of the bottom portion (13) of the outer shell, and the outer shape of the support column portion (22) fits the inner shape of the constricted portion (12) of the outer shell. The stamping material (2) having a related shape is fixed such that the end of the stamping surface portion (21) on the side of the support column (22) is supported by the constriction from the bottom (13) toward the middle (12) of the outer shell. And a stamp made by engraving (3) on the exposed surface of the stamping material (2). 2. The seal according to claim 1, wherein a material selected from boxwood or buffalo horns is used as the stamp material. 3. A hollow outer shell (1) obtained by precision casting or electroforming of a noble metal, wherein the middle shell (12) is a constricted gourd shape, the top (11) is closed and the bottom (13) is open. Inside, a stamping piece (21) integrally formed
And a support pillar portion (22), and a stamp face piece portion (21)
The outer shape of the outer shell fits the inner shape of the bottom portion (13) of the outer shell, and the outer shape of the support column portion (22) fits the inner shape of the constricted portion (12) of the outer shell. The stamping material (2) having a related shape is fixed such that the end of the stamping surface portion (21) on the side of the support column (22) is supported by the constriction from the bottom (13) toward the middle (12) of the outer shell. A stamp made by fixing a stamp (3) on a noble metal plate (5) on the exposed surface of the stamp material (2). 4. A gold alloy of K14-20 as a noble metal,
Use the one selected from platinum alloy and silver alloy,
An outer shell (1) manufactured by precision casting.
Seal. 5. The seal according to claim 1, wherein the outer shell (1) is manufactured by electroforming using a noble metal selected from gold, platinum and silver.