JP6240903B1 - seal - Google Patents

Abstract

To provide a seal stamp capable of obtaining a clear imprint with a small stamping force. A seal 10 includes a stamp 11 having a specific gravity of 12.0 or more made of a metal material having a tungsten content of 65.0% by weight or more. [Selection] Figure 3

Description

  The present disclosure relates to a seal.

  Conventionally, natural materials such as ivory, crystal, fangs / horns, and eyelashes, and synthetic resin materials such as acrylic and polyester have been used as seal materials.

  In recent years, metal materials such as titanium have also been used as seal materials in order to increase the durability of the seals.

JP-A-5-169785 Japanese Patent No. 2880136

  By the way, when imprinting a seal, the imprint may be blurred or misaligned. In order to prevent such fading and displacement, a flexible stamping mat is placed under the paper to be stamped.

  However, it is troublesome to lay a stamp mat every time. Further, in order to print a clear imprint with no blurring, an appropriate printing force is required, but if the force is applied too much, the imprinting may be displaced. For this reason, it is not easy for the user to obtain a clear imprint without blurring or shifting.

  An object of this indication is to provide the seal which can obtain a clear imprint with small printing power.

  The seal stamp according to one aspect of the present disclosure includes a stamp material having a specific gravity of 12.0 or more, which is made of a metal material having a tungsten content of 65.0 wt% or more.

  Since the seal stamp according to the present disclosure includes a stamp material having a specific gravity of 12.0 or more made of a metal material having a tungsten content of 65.0 wt% or more, it is heavier than a conventional seal stamp of the same size. Therefore, the seal stamp according to the present disclosure can obtain a clear imprint with a small printing force.

The perspective view which shows the seal | sticker which concerns on embodiment Side view showing a seal according to an embodiment Figure showing imprint comparison test results The perspective view which shows the seal | sticker which concerns on a modification

  Hereinafter, embodiments of a seal according to the present disclosure will be described with reference to the drawings. The embodiment disclosed below is an example in all respects, and there is no intention to limit the seal according to the present disclosure.

  Note that in the embodiments disclosed below, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and overlapping descriptions of substantially the same configuration may be omitted. This is to facilitate understanding by those skilled in the art by avoiding unnecessarily redundant descriptions.

[Embodiment]
FIG. 1 is a perspective view showing a seal stamp according to the embodiment. As shown in FIG. 1, the seal 10 according to the present embodiment is composed of only a substantially cylindrical stamp 11. The stamp 11 has a stamping surface 12 at one end. Note that the seal 10 is not limited to the one composed only of the stamp material 11, and may be one in which a protrusion as a so-called “attach” is attached to the stamp material 11, or the surface of the stamp material 11 is colored by coating or the like. A coating layer having the following may be formed.

  The stamp 11 is made of only a metal material having a tungsten content of 65.0% by weight or more, and has a specific gravity of 12.0 or more. The metal material here means a pure metal, an alloy metal, a fiber reinforced metal to which a nonmetal such as a fiber is added, or the like.

  Specifically, in the case of the present embodiment, the stamp material 11 is made of only a metal material having a tungsten content of 99.6 wt% or more when the weight of the stamp material 11 (metal material) is 100 wt%. . Further, the printing material 11 has a specific gravity of 19.3.

  Further, the metal material contains 33 ppm or more and 53 ppm or less of potassium as an additive. Further, the metal material contains, as impurities, 0.005% by weight or less of iron, 0.005% by weight or less of molybdenum, and 0.03% by weight or less of other nonvolatile content.

  Note that when potassium is added to the metal material, the effect of improving the workability of the metal material can be obtained.

  The seal surface 12 is a surface engraved with a target seal imprint and a seal imprint that is upside down. Since the stamp material 11 made of a metal material having a tungsten content of 65.0% by weight or more is very hard, a laser engraving machine is used for engraving to form the stamp surface 12. Examples of the laser to be used include a YAG laser and a fiber laser. In addition, examples of the imprint include characters such as names and company names, figures, symbols, or combinations thereof.

  FIG. 2 is a side view showing a seal stamp according to the embodiment. As shown in FIG. 2, the radial width W <b> 1 of the marking surface 12 is longer than the radial width W <b> 2 of the top surface (surface opposite to the marking surface 12) 13. That is, the seal 10 has a tapered shape from the end portion 14 on the stamp surface 12 side toward the end portion 15 on the top surface 13 side. As a result, the finger holding the seal 10 at the time of stamping is less likely to slip downward, and a force can be accurately applied to the stamp surface 12. That is, it is possible to obtain a clear imprint without blurring or misalignment with a small stamping force.

  The tapered shape referred to here is not limited to a straight outline of the side surface 16 of the stamp 11 in the side view shown in FIG. 2. If the width W1 is longer than the width W2 and is tapered as a whole, the side 16 The contour line may be a curved line or a bent line. For example, the side surface 16 of the seal 10 may be provided with a recess for fitting a finger for gripping the seal 10 or a projection for hooking the finger, and the shape of the side 16 may not be symmetrical.

  The size of the seal 10 called a so-called round shape is 60.0 mm in height, 10.5 mm, 12.0 mm, 13.5 mm, 15.0 mm in width W1 for a seal, bank seal, real seal, and company seal. Generally, it is either 16.5 mm or 18.0 mm. The height here is the length from the end portion 14 on the marking surface 12 side to the end portion 15 on the top surface 13 side.

  In addition, the height and width W1 of the seal 10 are not limited to the general size. In addition, the shape of the stamp surface 12 is a round shape in the present embodiment, but may be other shapes such as an oval shape. Further, in the present embodiment, the surface other than the stamp surface 12 of the seal 10 is mirror-finished or sandblasted, but is not limited thereto. For example, the printing material 11 may be heat-treated to form an oxide film on the surface of the printing material 11 and add color to the printing material 11.

[effect]
(Marking performance)
According to the seal stamp 10 according to the present embodiment described above, it is easy to obtain a clear imprint with little blurring and misalignment with a small stamping force. For example, when the height is 60.0 mm and the width W1 is 18.0 mm, the weight of the ivory seal is about 27 g, and the weight of the titanium seal is about 69 g. In contrast, the seal 10 according to the present embodiment has a weight of about 295 g, which is about four times as heavy as a titanium seal. With this weight, it is possible to obtain a clear imprint with little blurring and displacement with a small printing force.

  Here, since a seal impression test using seal materials having different specific gravities was performed, the result of the comparison will be described.

  The comparative test was performed using the seals of the following five samples 1-5.

  The seal of sample 1 is made of titanium (specific gravity 4.5). The seal of sample 2 is made of a cobalt-chromium-molybdenum alloy (specific gravity 8.4). The seal of Sample 3 is made of a tungsten-nickel-copper alloy (specific gravity 12.0, tungsten content 65.0% by weight). The seal of sample 4 is made of a silver-tungsten alloy (specific gravity 14.9, tungsten content is 65.0% by weight). The seal of sample 5 is made of tungsten (specific gravity 19.3, containing 99.6% by weight of tungsten).

  The seal stamps of samples 1 to 5 were collected according to the following procedure. Note that the sizes of the seals of Samples 1 to 5 are all the same (height is 60.0 mm and width W1 is 13.5 mm), and the vermilion attached to the stamp surface and the paper to be stamped are also the same. Also, no stamping mat is used at the time of stamping.

  First, apply vermilion firmly to the seal. Next, the seal is placed straight on the paper to be stamped with the stamp side down. At this time, no force is applied to the stamping direction, and the stamping time (leaving time) is 10 seconds. After 10 seconds, gently lift the sample from the paper.

  FIG. 3 is a diagram showing the result of the comparison test of the seal impression. As shown in FIG. 3, in the seals of Samples 3 to 5 in which the specific gravity of the printing material is 12.0 or more, a clear imprint with little blurring could be obtained. In particular, in the seal stamp of Sample 5 in which the stamp material is made of a metal material having a tungsten content of 99.6% by weight or more, a clear imprint without blurring was obtained. On the other hand, in the seal stamps of Samples 1 and 2 in which the stamp material is made of a metal material that does not contain tungsten, the seal image has faded.

  In this comparative test, since no force is applied to the seal in the stamping direction at the time of stamping, there is no deviation in the seal impression. Therefore, it can be said that in the seal stamps of Samples 3 to 5, it is possible to obtain an imprint with little blurring and displacement by simply placing them. On the other hand, in the seal stamps of Samples 1 and 2, the seal is faint only by placing them. In order to obtain an imprint with no blurring with the seal stamps of Samples 1 and 2, an appropriate printing force is required. However, if too much force is applied, the imprint is shifted.

  From the result of the comparison test of the imprint described above, if the stamp is a stamp having a specific gravity of 12.0 or more made of a metal material having a tungsten content of 65.0% by weight or more, an imprint with little blurring and deviation is obtained. I found out that I could do it.

  In addition, in order to obtain a clear imprint without blurring or deviation, the specific gravity of the printing material is preferably 14.9 or more, and more preferably 18.0 or more. Further, the content of tungsten contained in the metal material is preferably 70.0% by weight or more, and more preferably 90.0% by weight or more.

  In particular, if it is a seal stamp provided with a stamping material having a specific gravity of 19.3 made of a metal material having a tungsten content of 99.6% by weight or more, it is possible to obtain a clear imprint without blurring or deviation at a low cost.

(Other effects)
Since tungsten has about twice the hardness (Vickers hardness) of titanium, the seal 10 according to the present embodiment is resistant to defects, wear, and deformation. That is, since the stamp surface 12 is resistant to chipping, wear, and deformation, the seal stamp 10 according to the present embodiment can keep the same seal impression semipermanently.

  Furthermore, the seals made of natural materials, synthetic resins, titanium, etc. that have been used conventionally have a problem that they are weak against high temperatures and combustion and become unusable when exposed to fire. On the other hand, since the melting point of tungsten is 3380 ° C., which is a high level in the metal, the seal 10 according to the present embodiment is less affected even in the event of a fire.

[Modification]
As mentioned above, although the seal 10 which concerns on this Embodiment was demonstrated, this indication is not limited to the said embodiment. Unless it deviates from the meaning of this indication, what carried out various modification which those skilled in the art can consider to the above-mentioned embodiment is also included in the range of this indication.

  (1) In the present embodiment, the shape of the printing material 11 is substantially cylindrical, but may be other shapes such as a substantially prismatic shape. The seal 10 having a substantially cylindrical shape of the stamp 11 is generally referred to as a round cylinder, but the seal 10 is not limited to this, and may be, for example, a round sky circle, a square hole, or a square sky circle.

  (2) In the present embodiment, a mark called “atari” that can determine the top and bottom of a character without looking at the marking surface 12 at the time of stamping may be added to the stamping material 11. The claws may be protrusions, indentations, or through holes.

  (3) In the present embodiment, the printing material 11 has a uniform specific gravity as a whole. However, in order to further improve the printing performance, the printing material 11 may be configured so that the specific gravity varies depending on the part.

  For example, the stamp material 11 may have a structure in which the tungsten content of the metal material varies depending on the part, and the tungsten content in the end portion 14 on the stamp surface 12 side is higher than the tungsten content in the end portion 15 on the top surface 13 side. Good. According to this configuration, since the center of gravity of the stamp 11 is closer to the stamp surface 12, the operability and stability of the stamp 10 at the time of stamping are improved. That is, the seal 10 can obtain a clear imprint with less fading and displacement with a small stamping force.

  The stamp 11 may have a configuration in which the tungsten content in the end portion 14 on the marking surface 12 side is lower than the tungsten content in the end portion 15 on the top surface 13 side. According to this configuration, the end 14 on the stamping surface 12 side of the stamping material 11 is softer than the metal material constituting the end 14 on the stamping surface 12 side of the stamping material 11 according to the embodiment. That is, since the weight of the printing material 11 as a whole is the same as that of the printing material 11 according to the embodiment, the stamp 10 can obtain a clear imprint with little blurring and displacement with a small printing force, and also forms a printing surface 12. Workability at the time of improving.

  FIG. 4 is a perspective view of a seal 10 composed of a first stamp 11a and a second stamp 11b. As shown in FIG. 4, the seal 10 includes a first printing material 11 a having a specific gravity of 12.0 or more made of a metal material having a tungsten content of 65.0 wt% or more, and a tungsten content of 99.6 wt%. % Of the second printing material 11b made of a material of% or less. A marking surface 12 is formed on the first marking material 11a, and a second marking material 11b is attached to an end portion 17 on the opposite side of the marking surface 12 of the first marking material 11a. Further, the side surface 16 of the printing material 11 is constituted by the side surface 16a of the first printing material 11a and the side surface 16b of the second printing material 11b.

  The first stamp material 11 a is provided with a male screw 18 on the end surface 17 opposite to the stamp surface 12, and the second stamp material 11 b is provided with a female screw 20 on the end surface 19 opposite to the top surface 13. ing. The first stamp material 11a and the second stamp material 11b are connected by screwing the male screw 18 into the female screw 20. In addition, the structure which provides the internal thread 20 in the end surface 17 of the 1st stamp 11a, and provides the external thread 18 in the end surface 19 of the 2nd stamp 11b may be sufficient.

  According to this configuration, a desired seal can be obtained simply by changing the first stamping material 11a in accordance with the application, such as for a seal, a bank seal, a real seal, or a company seal, which is convenient for carrying around. Moreover, although the 1st printing material 11a and the 2nd printing material 11b are connected by screwing together with a screw, it is not limited to this.

  For example, it may be connected by a method such as adhesion or press fitting.

DESCRIPTION OF SYMBOLS 10 Seal 11 Stamping material 11a 1st stamping material 11b 2nd stamping material 12 Stamping surface 13 Top surface 14 End part on the marking surface side 15 End part on the top surface side (End part on the opposite side to the marking surface)
16 side face 16a side face of the first printing material 16b side face of the second printing material 17 end face (end face opposite to the printing face of the first printing material)
18 Male screw 19 End face (End face opposite to the top face of the second stamp)
20 Female thread

Claims (9)

  A seal comprising a stamping material having a specific gravity of 12.0 or more and made of a metal material having a tungsten content of 65.0% by weight or more.   The stamp according to claim 1, wherein the stamp is made of a metal material having a tungsten content of 99.6% by weight or more. The seal stamp according to claim 1 or 2, wherein the stamp material has a tapered shape from an end portion on the stamping surface side toward an end portion on the opposite side to the stamping surface. The printing material is configured so that the specific gravity varies depending on the site,
The seal according to any one of claims 1 to 3. The stamping material has a different tungsten content in the metal material depending on the part, and the tungsten content in the end on the stamping surface side is higher than the tungsten content in the end on the opposite side to the marking surface,
The seal according to any one of claims 1 to 4. The stamping material has a different tungsten content in the metal material depending on the site, and the tungsten content in the end on the marking surface side is lower than the tungsten content in the end on the opposite side to the marking surface,
The seal according to any one of claims 1 to 4. The printing material has been added with a color by forming an oxide film on the surface of the printing material by heat treatment,
The seal according to any one of claims 1 to 6. A first printing material having a specific gravity of 12.0 or more, comprising a metal material having a tungsten content of 65.0% by weight or more;
A second stamp made of a material having a tungsten content of 99.6% by weight or less;
With
A stamping surface is formed on the first stamping material,
The said 2nd stamp is attached to the edge part on the opposite side to the said marking surface of the said 1st stamp, The seal stamp characterized by the above-mentioned.   The seal stamp according to claim 8, wherein the second stamp material is screwed to an end portion of the first stamp material opposite to the stamp surface.