JP2002192822A - Ink penetrating seal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink penetrating seal, which can be manufactured at low cost by a method wherein a sealing material mounting structure is so improved as to reduce the number of parts. SOLUTION: A pedestal 31 is mounted to a holder 23. In the pedestal, at the top side of which a larger diametral part 45 as an indent for housing the sealing material therein is formed. At the opening part of the larger diametral part, an inlet projecting part 51 is formed, while an interior projecting part 53 is formed between the inlet projecting part and a bottom part 49. By holding the holding allowance 77 of the sealing material 71 by the inlet projecting part, the outer periphery of a main body part is compressed by the interior projecting part, resulting in fixing the sealing material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an ink-penetrating seal. More specifically, the present invention relates to an ink-penetrating seal having an improved structure for attaching a seal material.

[0002]

2. Description of the Related Art Conventionally, an ink-penetration type seal (hereinafter simply referred to as a seal) using a material capable of impregnating ink into a seal material.
Is used. An example of such a seal is shown in an exploded vertical sectional view of FIG.

The seal 1 includes a holder 2 having one end 3 opened. The pedestal 4 is attached to the one end opening 3. That is, the pedestal 4 is a cylindrical member provided with a through-hole 5, and a radially outward flange 6 is formed at a predetermined position in the axial direction, and a lower pedestal 7 below the flange 6 is connected to one end of the holder 2. It is inserted into the opening 3 and is fixed in a state where the flange 6 is in contact with the end face of the opening 3. On a pedestal upper portion 8 above the flange portion 5 of the pedestal 4, a stamping material fixing ring 9 for fixing a stamping material described later is attached. The fixing ring 9 is also a hollow cylindrical member, and the fixing ring 9 is attached to the pedestal 4 by fitting a lower portion of the fixing ring 9 into the upper portion 8 of the pedestal. The mounting ring 9 is made of metal, and the upper end thereof is a bent portion 10 bent inward in the radial direction.

[0004] The stamping material 11 has a main body 12 having a circular cross section, and a stamp surface 13 formed concentrically with the main body 12 above the main body 12. The stamp surface 13 has a smaller diameter than the main body 12, and an annular shoulder 15 is formed near the outer periphery of the upper surface of the main body 12. The printing material 11 is placed on the upper end surface 8a of the pedestal 4. Then, the fixing ring 9 is covered from above, and the fixing ring 9 is fitted and fixed until the lower end surface 9a of the fixing ring 9 comes into contact with the upper surface of the flange 6 of the pedestal 4. At this time, the bent portion 13 presses the shoulder portion 15 of the stamp material 14, so that the stamp material 11 is fixed on the pedestal 4. Reference numeral 16 is a cap. Here, in a state where the stamping material 11 is fixed by the fixing ring 9, the upper end surface 14 of the stamping surface portion 13 of the stamping material 11 projects above the upper end surface 10 a of the bent portion 10 by a predetermined dimension. When the seal is used, the stamp surface 13 is pressed against the paper surface and compressed. That is, the bent portion 10 fixes the stamp material 11 and regulates the compression allowance of the stamp face portion 13 so that a clear stamp can be obtained.

However, in the above-mentioned seal, the stamp material 11 is attached to the pedestal 4 using the stamp material fixing ring 9, so that the number of components is large, and the process of the fixing ring itself requires a step of forming the bent portion 10, which is costly. Will be higher.
Also, when the stamp material 11 hits the paper diagonally at the time of stamping,
There is a possibility that the shoulder 15 of the stamp 11 moves inward in the radial direction and shifts from the bent portion 10 so that the stamp 11 comes off.
In order to prevent this, it is necessary to increase the width of the shoulder portion 15 and the bent portion 10 to secure a wide holding margin. As a result, the diameter of the stamp material 11, that is, the diameter of the seal 1 increases, and the material cost increases.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has an improved stamping material fixing structure, thereby reducing the number of parts and reducing the manufacturing cost. Is to provide It is another object of the present invention to provide an ink-penetrating seal that can be reduced in size.

[0007]

In order to solve the above-mentioned problems, according to the present invention, a pedestal attached to a holder has a recess formed on a side protruding from the holder.
A projection formed radially inward is provided at the opening-side end of the recess. The main body of the stamping material is received in this recess, and the shoulder formed near the outer periphery of the end face of the main body on the side of the stamping face is pressed from above by a projection to fix the stamping material to the pedestal.
In another embodiment, a protrusion formed radially inward is provided on the inner peripheral wall of the recess of the pedestal at a predetermined position between the open end and the bottom of the recess.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments, but falls within the scope of the invention described in the claims. Thus, various modifications are possible, and these are also included in the scope of the present invention.

FIG. 1 is an exploded perspective view of an ink penetrating seal 21 according to a specific embodiment of the present invention. This seal 21 is also provided with a cylindrical holder 23 having one end 25 opened as in the conventional example. The pedestal 31 is attached to the opening end 25. The pedestal 31 is a cylindrical member having a through hole 33, and has a flange portion 35 radially outward at a predetermined position in the axial direction on the outer peripheral side. Four elongated protrusions 39 extending in the circumferential direction at a position slightly below the flange 35 are formed at equal intervals on the outer periphery of the base lower portion 37 below the flange 29 in this embodiment. Base lower part 37
Is inserted into the open end 25 of the holder 23 and the raised portion 39
Fits into a circumferentially extending groove (not shown) formed on the inner peripheral wall of the holder 23, thereby fixing the pedestal 31 to the holder 23.

Reference numeral 71 denotes a stamp material, which is received in the through hole 33 of the pedestal 41 and attached thereto, which will be described later. On the outer periphery of the pedestal upper portion 41 above the flange 35 of the pedestal 41, three elongated protrusions 43 extending in the circumferential direction at a position slightly above the flange 35 are formed at equal intervals in this embodiment. ing. The cap 91 is fitted to the pedestal upper portion 41 and the raised portion 43 is fitted to a circumferentially extending groove (not shown) formed on the inner peripheral wall of the cap 91.
The cap 91 is attached to the base 31.

In the present embodiment, a raised portion 39 formed on the lower portion 37 of the pedestal 31 and a raised portion 4 formed on the upper portion 41 are provided.
3 has the same shape, but the number of the raised portions 39 formed in the lower portion 37 is larger, and once fitted to the pedestal 31, the holder 23 is less likely to come off the pedestal. . Therefore, when removing the cap 91 to use the seal 21, the holder 23 does not come off the pedestal 31. The shapes and numbers of the grooves of the holder 23 and the cap 91 formed corresponding to the raised portions 39 and 43 are not limited to the present embodiment. Ridges 39, 4
The direction in which 3 extends is not limited to the circumferential direction, and may be formed so as to extend in the axial direction of the pedestal 31.

FIG. 2 is a longitudinal sectional view showing a state where the stamp material 71 is attached to the pedestal 31. As shown in the figure, the through hole 33 of the pedestal 31 is composed of a large diameter portion 45 having a short upper side and a large diameter, and a small diameter portion 47 having a long lower length and a small diameter. The large-diameter portion 45 serves as a mounting portion for a later-described stamping material 71. An inlet projection 51 protruding radially inward at a predetermined height and extending in a circumferential direction is formed at an upper end opening thereof. ing. Further, the bottom portion 49 of the large diameter portion 45
An internal projection 53, which also projects radially inward and protrudes by a predetermined height, is formed between the projection and the projection 51 in the circumferential direction. In the figure, the protrusions 51 and 53 are exaggerated. In addition, the protrusions 51 and 53 may be formed in the shape of a protrusion formed integrally over the entire circumference, or may be formed as a plurality of divided parts. Small diameter part 45
As shown, an annular groove 55 having a depth up to near the bottom 49 of the large diameter portion 45 is formed. This is because the pedestal 31 is formed of plastic, which facilitates the formation and forms the pedestal into accurate dimensions.

As in the case of the conventional printing material, the printing material 71 has a disk-shaped main body portion 73 and a small-diameter printing surface portion 75 formed concentrically on the upper side thereof. Therefore, the main body 7
An annular press allowance 77 is formed on the upper surface side of 3. As in the conventional example, the stamping material 71 is made of a porous material such as nitrile rubber or urethane having elasticity so that the ink can be impregnated. And the thickness of the main body 73 is
The distance between the lower surface of the entrance projection 51 of the large diameter portion 45 of the pedestal 31 and the bottom 49 of the large diameter portion 45 is equal to or slightly larger. Therefore, the stamping material 71 can be attached as shown in the figure by pushing the stamping material 71 into the large diameter portion 45 from above the large diameter portion 45. In this case, the entrance projection 51 presses the pressing allowance 77 of the stamp 71 from above, and the internal projection 53 compresses the main body 73 of the stamp 71 from the surroundings and fixes it as shown in the figure. When a sufficient fixing force can be obtained, a groove may be formed in the outer peripheral portion of the main body 73 of the stamp 71 in correspondence with the internal projection 53.

[0014]

As is apparent from the above description, according to the present invention, the pedestal is provided with a recess for receiving the main body of the stamping material, and the opening of the recess is formed with a radially inward entrance projection. Since the pressing margin formed in the vicinity of the outer peripheral portion of the upper surface of the main body of the printing material is suppressed by using the projection, the conventionally used printing material fixing ring becomes unnecessary. Also, when a further radially inward internal projection is provided at a predetermined position in the axial direction of the depression,
Since the fixing force is added by this, it is possible to reduce the pressing allowance of the stamping material and the width of the entrance projection, and it is possible to further reduce the size of the stamp and to reduce the material cost with the downsizing of the stamping material. Savings are also possible.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an ink-penetrating seal according to a specific embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the seal shown in FIG. 1, showing a state where a seal material is attached to a base.

FIG. 3 is an exploded vertical sectional view of a conventional ink-penetrating seal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Ink penetration type seal 23 Holder 31 Pedestal 33 Through-hole 35 Flange part 45 Large diameter part 47 Small diameter part 51 Inlet projection 53 Internal projection 71 Stamping material 73 Main body 75 Stamping surface 77 Pressing allowance

Claims (2)

[Claims] A cylindrical holder having at least one open end, an axial pedestal attached to the one end opening of the holder at one end, and having the other end protruding from the holder; A marking material fixed to the pedestal, the pedestal comprising a recess formed at the other end side, and a projection formed radially inward at an opening end of the recess. Comprises a main body received in the recess of the pedestal, and a stamped surface formed on the upper side of the main body and having a smaller diameter than the main body and concentric with the main body.
An ink-penetrating seal, wherein the protruding portion of the pedestal is fixed by pressing an end surface of the main body portion of the printing material on the side of the printing surface from above. 2. The ink-penetrating seal according to claim 1, wherein an inner peripheral wall of the recess of the pedestal is radially inward at a predetermined position between an opening end and a bottom of the recess. An ink-penetrating seal having a projection formed thereon.