JP6024716B2 - Stamp and its manufacturing method - Google Patents

Description

The present invention relates to a stamp and a manufacturing method thereof , in which a stamp sheet and a stamp holder are fused and held over the entire circumference, and both are fixed and sealed.

Since the stamp of Patent Document 1 is obtained by simply fusing the edge of the stamp material and the end face of the stamp holder by heat, the adhesive strength is weak. If the stamp is used repeatedly, the adhesive part will crack and ink will leak out from the crack. There was a drawback. Further, when used, there is a drawback that the bonded portion is broken and the printing material falls from the stamp holder.
Also, when melt bonding the peripheral edge of the stamp and the end face of the stamp holder, the upper end of the stamp must be in contact with the lower end of the base so that the stamp does not move upward. Since the base is an indispensable member, there are restrictions on the configuration.
Furthermore, since the peripheral edge of the printing material is melted inside the end face of the stamp holder, there is a drawback that the effective area of the printing surface is reduced. Further, since the stamp surface is smaller than the stamp holder end surface, there is a drawback that it is difficult for a user who uses the stamp holder end surface contour as a guideline for marking and stamping to determine the size and position of the stamp surface.

In the stamp of Patent Document 2, the lower end edge of the stamp holder member and the peripheral edge of the printing material are deformed by heat pressure, the peripheral edge of the printing material is formed on the slope, and the wedge that hooks the lower end edge of the stamp holder member on the peripheral edge of the printing material. Since the bottom edge of the stamp holder member is formed into a wedge, the attachment of the stamp holder member and the stamping material is mechanical, providing a seal with excellent sealing performance and effective for repeated use. To do. However, since the wedge portion is provided on the stamping material side that is directly subjected to the stress of the imprinting, there is a defect that the adhesive portion gradually cracks due to repeated use, ink leaks out from the crack, or the crack expands and breaks. there were.
Also, when the peripheral edge of the printing material and the lower edge of the stamp holder member are deformed by heat pressure, the upper end of the printing material needs to be in contact with the lower end of the support column provided in the holder member so that the printing material does not move upward. In addition to the stamp and stamp holder members, the supporting pillars are indispensable members when deformed by hot pressure, so there are structural limitations.
Further, since the peripheral portion of the printing material melts from the inner side of the lower end edge of the stamp holder member, there is a drawback that the effective area of the printing surface is reduced. Further, since the stamp surface is smaller than the stamp holder end surface, there is a drawback that it is difficult for a user who uses the stamp holder end surface contour as a guideline for marking and stamping to determine the size and position of the stamp surface.

The stamp of Patent Document 3 is provided with a protrusion on the lower end surface portion of the frame of the stamp holder, and the joining portion is formed on the lower end surface portion of the frame. There was a disadvantage inferior to.
In addition, when melt bonding the peripheral edge of the porous printing material and the protrusion, the upper end of the porous printing material must be in contact with the lower end of the ink occlusion body so that the porous printing material does not move upward. Since the ink occlusion body is an essential member in addition to the marking material and the frame, there are restrictions on the configuration.
Furthermore, since the peripheral portion of the porous stamping material melts from the inner side of the lower end surface portion of the frame, there is a drawback that the effective area of the stamping surface becomes narrow. Further, since the stamp surface is smaller than the stamp holder end surface, there is a drawback that it is difficult for a user who uses the stamp holder end surface contour as a guideline for marking and stamping to determine the size and position of the stamp surface.

  The stamp of Patent Document 4 is obtained by fusing and holding the peripheral edge portion of the printing material and the lower end portion of the stamp holder by heat. However, since the lower end portion of the stamp holder is flat, there is a disadvantage that the melting area is small and the adhesiveness is poor. It was.

JP-A-4-363285 JP 2000-94818 A JP 2009-73033 A JP-A-10-181173

The present invention, without cracking the fused portion of the stamp material sheet and stamp material holder be used repeatedly stamp, stamp and a method of manufacturing the printing material sheet and stamp material holder excellent in reliably fixed and sealability The purpose is to provide.

The invention according to claim 1 completed in order to solve the above problems includes a printing material sheet made of a thermoplastic resin,
It is a stamp made of a material that is the same as or similar to the stamp material sheet, and a stamp material holder having a frame that holds the stamp material sheet,
The frame has a bowl-like shape extending horizontally inward at the upper end of the printing material holder,
Projections are provided on the entire upper surface of the bowl-shaped frame, and the printing sheet is bonded and held to the frame with a melt of the peripheral edge and the projections. stamp.
The invention according to claim 2 is the stamp according to the first invention, characterized in that a plurality of the protruding pieces having the same height are provided at regular intervals.
The invention according to claim 3 is a printing material sheet made of a thermoplastic resin,
This stamp material sheet is made of the same or similar material, a stamp material manufacturing method comprising a stamp material holder having a frame for holding the stamp material sheet,
The frame has a bowl-like shape extending horizontally inward at the upper end of the printing material holder,
A projecting piece is provided over the entire circumference of the upper surface of the bowl-shaped frame, and is pressed and heated in a state in which the peripheral portion of the printing material sheet is placed on the projecting piece. A stamp manufacturing method characterized in that a stamp sheet and a frame are bonded together by fusing.

The stamp of the present invention has a bowl-like frame extending horizontally inward at the upper end of the printing material holder, and a protruding piece is provided over the entire circumference of the upper surface of the frame. Since the protruding piece and the peripheral edge are fused and held in a state where the peripheral edge of the printing material sheet is placed, the amount of fusion is larger than a flat frame having no protruding piece, and the stamping is repeated many times. In addition, the peripheral edge of the printing material sheet does not come off from the printing material holder or the gap is not opened, and the sealing property is excellent and ink leakage does not occur.
Further, when the printing material sheet is fused to the frame, no other parts are required, and the two components of the printing material sheet and the frame are completed.
Furthermore, since the peripheral edge portion of the printing material sheet is melted only at the upper end surface of the frame, the area of the entire inner surface of the frame can be effectively used as the printing surface. In addition, since the peripheral portion melts only at the end face of the stamp holder, the size and position of the stamp face can be easily understood by a user who prints using the end face contour of the stamp holder as a guideline for stamping and imprinting.

Cross section of the stamp of the present invention Explanatory drawing of the fusion holding | maintenance of an Example

In the following, an embodiment according to the present invention will be described with reference to FIGS.
In the present invention, “upper” and “upper end” indicate the printing material sheet side, and “lower” and “lower end” indicate the printing material holder side.
The stamp of the present invention includes a printing material sheet 1 made of a thermoplastic resin, and a printing material holder 2 provided with a projecting piece 22 on an upper end surface of a frame 21 that holds the printing material sheet 1. Then, the protruding piece 22 and the peripheral edge portion 11 are fused and held in a state where the peripheral edge portion 11 of the printing material sheet 1 is placed on the protruding piece 22. By doing so, the peripheral edge portion 11 and the projecting piece 22 of the printing material sheet 1 are fused and held over the entire circumference.

As a thermoplastic resin used as the raw material of the stamp sheet 1, a thermoplastic resin that melts at 50 ° C. to 300 ° C. can be used. For example, polyethylene, polypropylene, polybutylene, polyurethane, polystyrene, polyvinyl chloride, polyester, polycarbonate , Polyethylene thermoplastic elastomer, polypropylene thermoplastic elastomer, polybutylene thermoplastic elastomer, polyurethane thermoplastic elastomer, polystyrene thermoplastic elastomer, polydiene thermoplastic elastomer, polychloride thermoplastic elastomer, ethylene vinyl acetate copolymer Resins can be used.
Among these, polyolefin thermoplastic resins such as polyethylene, polypropylene, ethylene-α olefin copolymer, polyethylene thermoplastic elastomer, and polypropylene thermoplastic elastomer are particularly preferably used.
The stamp sheet 1 can be made of a thermoplastic resin stamp material in which characters and the like are not formed, or a thermoplastic resin stamp material in which characters and the like are formed in a convex shape. When a stamp made of thermoplastic resin with no characters or the like is used, the stamp will be formed after the stamp of the present invention is completed, and a stamp made of thermoplastic resin with the characters or the like previously formed in a convex shape is used. In this case, the stamp of the present invention can be used immediately after completion.
Moreover, the stamp material sheet 1 can use a porous material or a non-porous material. When a porous printing material is used, it is possible to obtain a penetrating mark that can contain ink, and when a non-porous printing material is used, it is possible to obtain a stamp that transfers ink from a stamp table.

The printing material holder 2 of the present invention includes a fitting portion 23 for fitting with the grip member 4 and other parts, and a frame 21 for holding the printing material sheet 1.
The printing material holder 2 may be a columnar body such as a rectangular column or a cylinder, or may be a frame shape having an open central portion. As the shape of the outer periphery of the printing material holder 2, a round / elliptical shape, a polygonal shape such as a triangle / quadrangle, or the like can be appropriately employed. When the printing material holder 2 has a frame shape, it is necessary to accommodate a cushioning material, an ink occlusion body, a bottom raising member for raising the height, etc. in the central opening.
The frame 21 indicates the edge portion on the upper surface of the printing material holder 2, and a protruding piece 22 is provided on the upper end surface of the frame 21. The protrusions 22 are provided over the entire circumference of the upper end surface of the frame 21, and the number thereof may be one or a plurality of two or more. Moreover, the protrusion 22 should just be provided in the upper end surface of the flame | frame 21, and the position may be anywhere in a center part or an end surface. The projecting piece 22 only needs to have a substantially projecting tip, and a cross-sectional shape such as a triangle, a quadrangle, or a trapezoid can be appropriately employed.
The material of the printing material holder 2 includes polyethylene, polypropylene, polybutylene, polyurethane, polystyrene, polyvinyl chloride, polyester, polycarbonate, polyethylene-based thermoplastic elastomer, polypropylene-based thermoplastic elastomer, polybutylene-based thermoplastic elastomer, polyurethane-based thermoplastic elastomer, Thermoplastic resins such as polystyrene-based thermoplastic elastomers, polydiene-based thermoplastic elastomers, polychloride-based thermoplastic elastomers, and ethylene-vinyl acetate copolymer resins are used.
In particular, it is preferable to use the same or similar material as the above-mentioned printing material sheet 1 from the viewpoint of adhesive performance. When a polyolefin-based thermoplastic resin is used for the printing material sheet 1, the material of the printing material holder 2 is also a polyolefin-based thermoplastic resin. Is preferably used.

As shown in FIG. 2A, the printing material sheet 1 is placed on a protruding piece 22 provided on the upper end surface of the frame 21. As described above, when the printing material holder 2 has a frame shape, it is preferable that the back surface of the printing material sheet 1 accommodates the cushion material 3, the ink occlusion body, the bottom raising member for raising the height, and the like.
Next, the peripheral edge portion 11 of the printing material sheet 1 and the protruding piece 22 provided on the upper end surface of the frame 21 are fused and held over the entire circumference. Specifically, as shown in FIG. 2B, a heat sealing jig 5 having a sufficient size capable of simultaneously melting the printing material sheet 1 and the frame 21 over the entire circumference is prepared, and this is used as the printing material sheet 1 and the frame 21. After being heated to a temperature higher than the melting temperature, the stamping sheet 1 and the frame 21 are pressed for several seconds.
More specifically, first, the heat sealing jig 5 contacts the peripheral edge 11 of the printing material sheet 1 to melt the peripheral edge 11, and when further pressed, the heat sealing jig 5 is attached to the projecting piece 22 provided on the frame 21. The protruding piece 22 is melted by contact. Next, both melts are bonded in a polymerized or mixed state. The fusion holding part formed by melting the two adheres in a shape in which the melts overlap or mix depending on differences in melting temperature, melting time, melting pressure, etc., but in any case on the upper end surface of the frame 21 It is formed.
Therefore, since a sufficient amount of fusion can be secured, the peripheral portion 11 of the printing material sheet 1 does not come off from the printing material holder 2 and no gap is opened even if the stamping is repeated many times. In addition to being able to be securely fixed, it has excellent sealing properties and can prevent ink leakage.
In the fusion holding step, it is preferable to place the protective film 6 in order to protect the surface of the stamp sheet 1 and to ensure the releasability of the heat sealing jig 5. The protective film 6 is a plastic film that can withstand high temperatures. For example, a polyethylene terephthalate film, a polyethylene naphthalate film, a polyamide film, a polytetrafluoroethylene film, a fluorine film, a silicone film, or the like can be used.

  As a method for forming characters on the stamp surface of the thermoplastic resin stamp material of the present invention, a method for forming a stamp surface by selectively irradiating infrared rays with a xenon flash lamp or the like, or a stamp surface by pressing on a heated mold And a method of directly engraving with a laser processing machine using various laser beams such as a carbon dioxide laser and a YAG laser can be used.

This example will be described in further detail.
A mixture of 100 parts by weight of a polyethylene resin having a melting point of 70 ° C., 20 parts by weight of polyethylene glycol having a molecular weight of 400, and 350 parts by weight of sodium chloride having a particle size of 10 to 60 μm is kneaded with a slight amount of carbon black. A sheet-shaped original member is created.
Next, the original member is immersed in warm water to completely remove polyethylene glycol and sodium chloride, and then sufficiently dried to obtain a grayish porous sheet having a thickness of 2.0 mm.
Next, the porous sheet is cut into a required size with a cutter to obtain a porous printing material sheet 1 made of a thermoplastic resin. At this time, when an ultrasonic cutter is used, it is possible to obtain the printing material sheet 1 whose cut surface is melted and solidified simultaneously with the cutting.

Next, a method for forming characters or the like on the stamp material sheet 1 will be described.
In this embodiment, a block is first created by a computer or the like, and then the block is output to paper using a dry copying machine or a laser printer that forms an image by attaching carbon toner to create a manuscript sheet. .
As the paper used in the present invention, a transparent sheet such as polypropylene resin, polyester resin, or polyethylene terephthalate resin or a white opaque sheet, or a sheet that transmits infrared rays, such as tracing paper or PPC paper, can be used.
As the manuscript, one that is divided and formed by a portion where a character or figure to be a stamp face is formed and the remaining portion and that can obtain a difference in infrared transmittance is used. Specifically, a transparent sheet or a white opaque sheet is used. Characters or figures drawn with heat-generating ink that generates heat when irradiated with infrared rays on one side, or letters or figures such as PPC paper or OHP paper by a copying machine formed as an infrared-absorbing film on the sheet surface, paper Examples include letters or figures drawn with ink or transfer tape (white type character correction tape, etc.) that reflects infrared rays on one side, or punched letters or figures on a sheet that does not transmit infrared rays. be able to.
Next, after wrapping the original sheet with a release film such as a laminate film that can transmit infrared rays, the original sheet of the present invention is obtained by cutting the original sheet into approximately the same size as the outer periphery of the stamp material sheet 1.
Next, infrared rays are applied while applying pressure so that the printing material sheet 1 and the original are in close contact with each other, and the surface layer of the surface of the printing material sheet 1 that is heated by transmission of infrared rays is mixed therein. A non-porous protective coating that prevents ink from seeping out is formed by melting and solidifying under the heat of fine powder of heat-generating material such as carbon, and the remaining surface of the porous printing material corresponding to the portion of the original with a low infrared transmittance is ink. It is formed on the bleeding surface and forms characters and the like.

Next, a printing material holder 2 made of polyethylene having a melting point of 70 ° C. and having a fitting portion 23 on the lower side and a frame 21 on which the printing material sheet 1 is placed on the upper side is prepared, and the printing material sheet 1 is placed on the frame 21. Put. A projecting piece 22 is provided at the center of the upper end surface of the frame 21. The projecting piece 22 is installed at a central portion at a distance from the inner surface of the frame 21.
A polyethylene terephthalate film is placed as a protective film 6 on the surface side of the printing material sheet 1.
A heat sealing jig 5 having a sufficient size capable of simultaneously melting the entire circumference of both the printing material sheet 1 and the frame 21 is prepared, heated to about 100 ° C., and then pressed against the printing material sheet 1 and the frame 21. . When pressing is started, the peripheral edge 11 of the printing material sheet 1 is first melted, and then the protruding piece 22 provided on the frame 21 is melted. When it is released after about 3 seconds while being pressed, the melted portion of the projecting piece 22 overlaps with the melted portion of the printing material sheet 1 and is held by fusion over the entire circumference. Further, a fusion holding portion formed by melting both is formed on the upper end surface of the frame 21.
The protective film 6 was removed to obtain a printing material holder 2 in which the printing material sheet 1 on which characters and the like were formed was fused and held.
After the printing material sheet 1 was impregnated with ink, the grip member 4 was connected to the fitting portion 23 of the printing material holder 2 in a state where the cushion material 3 was accommodated on the back surface of the printing material sheet 1 to obtain a stamp of this example.
Here, the timing for forming characters on the stamp material sheet 1 may be formed before being fused and held on the frame 21, or may be formed after being fused and held on the frame 21. Further, a stamp cap (not shown) may be provided for the purpose of protecting the surface of the stamp sheet 1 and preventing the ink from being damaged.

  The stamp created using the present embodiment has the protruding piece 22 and the peripheral edge in a state where the peripheral edge portion 11 of the printing material sheet 1 is placed on the protruding piece 22 provided on the entire upper end surface of the frame 21. Since the portion 11 is fused and held, the amount of fusion is large, and even if the stamping is repeated hundreds of thousands of times, the peripheral edge of the printing material sheet 1 does not come off from the printing material holder 2 and no gap is opened. In addition, since the printing material sheet 1 and the printing material holder can be securely fixed, the sealing material is excellent in airtightness and ink evaporation and ink leakage can be prevented.

  Although the present invention has been described with reference to the most practical and preferred embodiments at the present time, the present invention is not limited to the embodiments disclosed herein, It should be understood that the scope of the invention can be appropriately changed without departing from the scope and spirit of the invention that can be read from the entire specification, and that a stamp with such a change is also included in the technical scope.

DESCRIPTION OF SYMBOLS 1 Printing material sheet 11 Peripheral part 2 Printing material holder 21 Frame 22 Projection piece 23 Fitting part 3 Cushion material 4 Grip member 5 Heat sealing jig 6 Protective film

Claims (3)

A printing sheet made of thermoplastic resin;
It is a stamp made of a material that is the same as or similar to the stamp material sheet, and a stamp material holder having a frame that holds the stamp material sheet,
The frame has a bowl-like shape extending horizontally inward at the upper end of the printing material holder,
Projections are provided on the entire upper surface of the bowl-shaped frame, and the printing sheet is bonded and held to the frame with a melt of the peripheral edge and the projections. stamp.   2. The stamp according to claim 1, wherein a plurality of protruding pieces having the same height are provided at regular intervals. A printing sheet made of thermoplastic resin;
This stamp material sheet is made of the same or similar material, a stamp material manufacturing method comprising a stamp material holder having a frame for holding the stamp material sheet,
The frame has a bowl-like shape extending horizontally inward at the upper end of the printing material holder,
A projecting piece is provided over the entire circumference of the upper surface of the bowl-shaped frame, and is pressed and heated in a state in which the peripheral portion of the printing material sheet is placed on the projecting piece. A method for manufacturing a stamp, wherein the stamp sheet and a frame are bonded together by fusing.