JP2018167475A - Seal - Google Patents

Abstract

To provide a seal in which failure does not occur such as blur of a seal impression even in a long term use.SOLUTION: A seal comprises: a body part 1; an ink absorber 3; and a printing body 4, in which the printing body 4 is brought into contact with a surface on which seal is performed for performing seal, by pressing the body part 1. The ink absorber 3 is stored in a compressed state so as to be always pressed with respect to the printing body 4, the printing body 4 is fused to a frame body 8 attached to a lower end of the body part 1, and the frame body 8 is slidably attached to the body part 1, and in performing seal, the frame body 8 slides to the body part side by pressing force of seal, for further applying compression force to the ink absorber 3.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a stamp that does not cause defects such as imprint defects even after long-term use.

  2. Description of the Related Art Conventionally, a stamp using a printing body made of a heat-sensitive stencil sheet punched by infrared irradiation or a thermal head is known. Such a stamp has a structure having a recess provided in the lower part of the main body, an ink absorber accommodated in the recess, and a printed body covering the opening of the recess.

  In the case of a stamp using a printing body made of the above-mentioned heat-sensitive stencil paper, for example, depending on the material of the printing paper, the type of the ink absorber, the number of times of use, etc., the imprinting will be blurred unless the pressing force at the time of stamping is adjusted There was a problem. In addition, as the ink absorber repeats the stamping, the restoring force (repulsive force) drops, and the ink pump cannot achieve a good pumping action, resulting in a decrease in ink followability and blurring of the imprint. There was also a problem.

In view of this, there has been proposed a stamp that prevents the occurrence of defects such as shading of the imprint by making the ink absorber compress at the time of pressing so as to obtain a good pumping action of the ink absorber (for example, , See Patent Document 1 and Patent Document 2).
However, even in the stamps described in Patent Document 1 and Patent Document 2, if the stamping is repeated for a long period of time, the pumping action of the ink absorber is lowered due to the sticking phenomenon of the ink absorber. In addition, if printing is repeated over a long period of time, the ink absorber will become loose, and the ink absorber at the time of non-printing will be densified (cured), so that the ink absorber and the printed body (high density) The difference in the density of the ink becomes small, the good capillary action does not work, and the ink permeability to the printed body is lowered. From the above, if the stamping is repeated for a long period of time, it has been impossible to avoid the problem that the imprinting is blurred.

Japanese Patent No. 4234950 JP-A-4-135369

  The present invention solves the above-mentioned conventional problems, prevents the ink absorber from dripping and restoring force even after long-term use, and prevents the ink absorber from pumping and non-printing. To provide a stamp that can permanently maintain the low density state of the ink absorber (relatively soft compared to the time of stamping), and as a result, does not cause defects such as shading of the imprint. It is intended.

The stamp of the present invention made to solve the above problems has a recess provided in the lower portion of the main body, an ink absorber housed in the recess, and a printed body covering the opening of the recess, A stamp that is printed by pressing the main body portion so that the printed body is in close contact with the surface to be printed,
The ink absorber is stored in a compressed state so as to always press against the printed body,
The printing body is fused to a frame body attached to the lower end of the main body, and the frame body is slidably attached to the main body.
At the time of stamping, the frame body is structured to slide to the main body side by the pressing force of the stamping and to apply a further compressive force to the ink absorber. Such an invention.

  According to a preferred embodiment, the frame is attached so that the hole provided on the outer periphery thereof engages with the convex provided on the outer periphery of the lower part of the main body, and the length of the hole in the vertical direction. It is preferable that the length of the projection is larger than the outer diameter of the convex portion, and the frame body is configured to slide relative to the main body portion.

  According to another preferred embodiment, a pedestal for protecting the printing body that is movable in the vertical direction with respect to the main body is attached to the lower portion of the main body, and this pedestal is normally attached by a spring member. It is preferable to have a structure that is bulleted downward to protect the printed body, and this is the invention according to claim 3.

  In the invention according to claim 1, the ink absorber is stored in a compressed state so as to be always pressed against the print body, and the print body is fused to a frame body attached to the lower end of the main body. The frame is attached to the main body so as to be slidable. At the time of marking, the frame is slid to the main body by the pressing force of the marking and further compressed to the ink absorber. Because it has a structure that applies force, even if the ink absorber becomes loose after long-term use, the ink absorber is pre-compressed in the initial compression, so the restoring force (elasticity) is Without being completely impaired, a good pumping action can be maintained permanently. In addition, since the restoring force (elastic force) of the ink absorber is not completely impaired, the density of the ink absorber at the time of non-printing is relatively small compared with that at the time of printing, and between the ink absorber and the printed material. In addition, since the close relationship is maintained for a long period of time, a good capillary action works, and the ink permeability to the printed body can be improved. From the above, even if the stamping is repeated for a long period of time, it is possible to prevent the imprint blur for a long period of time.

  In the invention according to claim 2, the frame is attached so that the hole provided on the outer periphery thereof engages with the convex provided on the outer periphery of the lower part of the main body, and the vertical direction of the hole. Since the length is formed to be larger than the outer diameter of the convex part and the frame body is configured to slide relative to the main body part, at the time of stamping, the frame body is slid by the pressing force of the stamp. A simple mechanism can be provided.

  According to a third aspect of the present invention, a printing body protecting pedestal that is movable in the vertical direction with respect to the main body is attached to the lower portion of the main body, and this pedestal is always below the spring by a spring member. Since the structure is such that the print body is protected by being ejected to the side, the spring member can reliably protect the print body.

1 is an overall perspective view showing an embodiment of the present invention. It is a front longitudinal cross-sectional view which shows embodiment of this invention. It is a perspective view which shows a main-body part. It is a front longitudinal cross-sectional view of FIG. It is a perspective view which shows a frame. It is explanatory drawing of the process in which a frame slides by pressing force at the time of stamping. It is a perspective view which shows a base. It is a front longitudinal cross-sectional view of FIG. It is explanatory drawing of the process in which a base and a frame are slid by the pressing force at the time of marking.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
In the present invention, the “printed surface” refers to a surface to be printed and refers to an ink absorbing surface such as paper and an ink non-absorbing surface such as metal and plastic.
FIG. 1 is an overall perspective view showing an embodiment of the present invention, and FIG. 2 is a front longitudinal sectional view thereof. The stamp of the present invention has a concave portion 2 provided in the lower portion of the main body 1, an ink absorber 3 accommodated in the concave portion 2, and a printing body 4 that covers the opening of the concave portion 2. By pressing 1, the printed body 4 is in close contact with the surface to be printed and printed. In the figure, 5 is a grip portion, and 6 is a pedestal for protecting the printed body.
The print body 4 is preferably made of a thermoplastic resin and is a porous body that is heated and melted when printing is performed using a thermal head. For example, the print body 4 is made of a thermoplastic resin or a thermoplastic elastomer. Specifically, synthetic resins such as polyolefin-based synthetic resins, polyamides, polyurethanes, polyesters, polyvinyls, polyacetals, etc., styrene-based, vinyl chloride-based, olefin-based, polyester-based, polyamide-based, urethane-based thermoplastic elastomers, Commercially available products include porous materials using polyethylene, polypropylene, nylon, polyurethane, polyester, polyvinyl chloride, vinyl acetate vinyl acetate copolymer, polyvinyl alcohol, polyethylene terephthalate, polyacetal resin, polycarbonate and the like as raw materials.

  In the recess 2, the ink absorber 3 is accommodated in a slightly compressed state so as to come into contact with the print body 4 in a constantly pressed state. In this specification, this compression is referred to as initial compression. By this initial compression, the ink absorber 3 can be surely brought into contact with the printed body 4, and the ink can easily penetrate.

FIG. 3 shows a perspective view of the main body, and FIG. 4 shows a front longitudinal sectional view thereof.
The main body 1 includes a base plate 1a, two support members 1b and 1b for supporting the grip 5 provided upright on both side parts of the upper surface, and a pillar provided upright in the center. 1c. Further, a concave portion 2 for accommodating the ink absorber 3 is provided at the lower portion of the main body portion 1. Furthermore, the some convex part 7 is formed in the surrounding wall 7a of the base board part 1a.

FIG. 5 shows a perspective view of the frame 8.
The frame body 8 is used to fix the print body 4 by fusion. The print body 4 is fused and fixed to the lower end of the peripheral wall 9a so as to close the opening 8a on the lower side of the frame body 8. Further, the peripheral wall 9a is formed with a hole 9 that engages with the convex portion 7. The frame body 4 is fitted to the main body 1 and the frame body 4 is slidable in the vertical direction.

  As shown in FIG. 6, the frame 8 is attached so that the hole 9 provided in the peripheral wall 9a is engaged with the convex part 7 provided in the peripheral wall 7a at the lower part of the main body. The length in the vertical direction is larger than the outer diameter of the convex portion 7, and a gap (s) is generated in the vertical direction when both are engaged. As a result, the state in which the ink absorber 3 presses the print body 4 slightly downward is usually maintained by the initial compression, and a gap (s) is formed between the lower end of the convex portion 7 and the lower end of the hole portion 9. (See the above figure).

On the other hand, when a pressing force is applied at the time of stamping, the printing body 4 is pressed, and at the same time, the frame body 8 is pushed upward and slides. As a result, the ink absorber 3 is further compressed. It will shrink slightly. In addition, a gap (s) is formed between the upper end of the convex portion 7 and the upper end of the hole portion 9 (see the following figure).
In this specification, this compression is called stamp compression. This stamping compression makes it easy to prevent blurring of the imprint by stable ink supply to the printing body 4 by the pumping action of the ink absorber 3. Further, since the hardness of the ink absorber 3 is increased at the time of stamping, the pressing force is easily transmitted to the central portion of the print body 3 and the omission phenomenon of the imprint is easily prevented. This effect becomes more prominent as the size of the printed body becomes larger than 100 mm. In addition to the initial compression described above, the ink absorber 3 presses the print body 4 by stamping compression and further shrinks by the gap (s). Therefore, even if the ink absorber 3 becomes loose due to long-term use, Since the ink absorber 3 is pre-compressed in the initial compression, the restoring force (elastic force) is not completely lost, and a good pumping action can be maintained permanently. In addition, since the restoring force (elastic force) of the ink absorber 3 is not completely impaired, the density of the ink absorber 3 at the time of non-printing is relatively smaller than that at the time of printing. Since the close relationship between the fonts 4 is maintained for a long period of time, a good capillary action works and the ink permeability to the print 4 can be improved. From the above, even if the stamping is repeated for a long period of time, it is possible to prevent the imprint blur for a long period of time. Further, since the hardness of the ink absorber 4 can be increased by stamping compression, the pressing force is easily transmitted to the central portion of the printing body 4 and the omission phenomenon of the imprint is easily prevented. This effect becomes more prominent as the size of the printed body 4 exceeds 100 mm.

FIG. 7 shows a perspective view of the base 6 and FIG. 8 shows a front longitudinal sectional view thereof.
The pedestal 6 protects the printed body 4 when not in use, and is attached to the lower portion of the main body 1 so as to be movable in the vertical direction with respect to the main body 1. A storage portion 6 a for storing and protecting the frame body 8 is formed at the lower portion of the base 6.
As shown in FIG. 2, the pedestal 6 is mounted so as to cover the main body 1, and is held by the spring member 10 so as to be always lowered to the lower side. It has a protective structure. On the other hand, at the time of marking, the printing body 4 is lowered by the pressing force so as to be able to print on the surface to be printed.

Below, the stamping process of the stamp of this invention is demonstrated.
The stamp configured as described above is the same as the conventional one in that the grip portion 5 is pressed to be printed on the surface to be printed. As shown in FIG. 9, at the time of non-printing, the pedestal 6 is retained by the spring member 10 and is lowered downward to protect the printed body 4. At this time, since the ink absorber 3 is accommodated in the recess 2 in a state where the initial compression is applied, the printing body 4 is pressed downward by the ink absorber 3, and the lower end of the protrusion 7 and the hole 9 are A slight gap (s) is formed between the lower end (see the above figure).
On the other hand, when the main body 1 is lowered by the pressing force at the time of stamping, the printed body 4 comes into contact with the surface to be stamped. Further, when pressing is performed for the stamping, the printing body 4 is pressed by the stamping compression, and the ink absorber 3 is contracted. As a result, the frame body 8 is pushed upward and slides, and a gap (s) is formed between the upper end of the convex portion 7 and the upper end of the hole portion 9 (see the following figure).

As described above, in the present invention, the ink absorber 3 is compressed in advance by the initial compression, even if the ink absorber 3 becomes loose due to long-term use due to the two compression actions of the initial compression and the stamp compression. The restoring force (elastic force) is not completely impaired, and a good pumping action can be maintained permanently. In addition, since the restoring force (elastic force) of the ink absorber 3 is not completely impaired, the density of the ink absorber 3 at the time of non-printing is relatively smaller than that at the time of printing. Since the close relationship between the fonts 4 is maintained for a long period of time, a good capillary action works and the ink permeability to the print 4 can be improved. From the above, even if the stamping is repeated for a long period of time, it is possible to prevent the imprint blur for a long period of time.
After the marking, the pedestal 6 is ejected by the spring member 10 and is lowered downward to protect the printed body 4. Further, the printing body 4 is also pressed downward by the ink absorber 3, and a slight gap (s) is formed between the lower end of the convex portion 7 and the lower end of the hole portion 9 (see the upper diagram of FIG. 9). reference).

DESCRIPTION OF SYMBOLS 1 Main-body part 1a Base board part 1b Support member 1c Column part 2 Concave part 3 Ink absorber 4 Printing body 5 Grip part 6 Base 6a Storage part 7 Convex part 7a Peripheral wall 8 Frame body 9 Hole part 9a Peripheral wall 10 Spring member s Gap

Claims (3)

A concave portion provided in the lower portion of the main body, an ink absorber housed in the concave portion, and a printing body covering the opening of the concave portion, and pressing the main body to place the printed body on the surface to be printed. A seal that is in close contact and stamped,
The ink absorber is stored in a compressed state so as to always press against the printed body,
The printing body is fused to a frame body attached to the lower end of the main body, and the frame body is slidably attached to the main body.
The stamp is characterized in that at the time of stamping, the frame body is configured to slide to the main body side by the pressing force of the stamp and to apply a further compressive force to the ink absorber.   The frame is attached so that the hole provided on the outer periphery thereof engages with the convex provided on the outer periphery of the lower part of the main body, and the vertical length of the hole is the outer diameter of the convex. The stamp according to claim 1, wherein the stamp is formed so as to be larger than the frame and the frame body is configured to slide relative to the main body.   A pedestal for protecting the printing body that is movable in the vertical direction with respect to the main body is attached to the lower part of the main body, and this pedestal is always ejected downward by a spring member to protect the printing body. The stamp according to claim 1 or 2, which has a structure.