JPH08207406A - Stamp device - Google Patents

Abstract

PURPOSE: To obtain a small-size portable stamp device capable of invariantly setting a seal with a constant printing quality. CONSTITUTION: Heat-sensitive stencil base paper with an image perforated is provided on one surface of an ink pad 51. The other surface is supported by an ink pad holder 49. A grip 33 is mounted on the ink pad 51 through a cylindrical member. A housing 1 is mounted slidably in the direction of an axis connecting the ink pad 51 to the grip 33. By pressing down the grip 33 on a medium to be printed, the ink pad 51 is compressed, and an image is transferred through the heat-sensitive stencil base paper. At this time, if further pressing down the ink pad 51 is attempted, an abutting part 33c of the grip 33 abuts on an upper end face 31a of a cylindrical guide 31 of the housing 1, thereby preventing the ink pad 51 from being further compressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stamping device using a heat-sensitive stencil sheet perforated by infrared rays or a thermal head.

[0002]

2. Description of the Related Art Heretofore, a heat-sensitive stencil sheet has been known in which characters and the like can be perforated by infrared irradiation or a thermal head. Above all, a heat-sensitive stencil sheet obtained by laminating a thermoplastic film and a porous thin paper with an adhesive. Is typical.
A small portable stamp apparatus using such a heat-sensitive stencil sheet is disclosed in Japanese Utility Model Laid-Open No. 63-11855. This stamping device has a stencil printing plate removably attached to a pedestal consisting of a grip portion, a cushion layer, and an adhesive layer. It has a three-layer structure with a transparent cover sheet, and is formed by filling ink in the space between the stencil sheet and the cover sheet, which is constituted by a frame, by coating or the like. In such a stamping device, stencil printing can be performed by attaching a stencil printing original on which desired characters, figures, and the like are perforated to a pedestal, and pressing the stencil printing original onto printing paper.

[0003]

However, in the stamping device according to Japanese Utility Model Laid-Open No. 63-11855, the ink thickness is not constant because the ink must be applied manually, resulting in uneven printing. There was a problem that is caused.

Further, if a predetermined amount or more is compressed at the time of printing, there is a problem that a large amount of ink oozes out and the print quality deteriorates.

The present invention has been made in order to solve the above-mentioned problems, and an object thereof is to provide a stamping device which can always imprint with a constant print quality.

[0006]

In order to achieve this object, a stamp device according to a first aspect of the present invention is provided with an ink impregnating body and a detachable one side surface of the ink impregnating body,
A heat-sensitive stencil sheet on which a perforated image is formed, an outer frame provided on the other side surface of the ink impregnated body and supporting the ink impregnated body, a grip portion provided on the outer frame, and the ink impregnated body. Since the ink impregnated body is not compressed by a predetermined amount or more because it is provided with a pressing force adjusting means for preventing the ink from being compressed by a predetermined amount or more at the time of printing, printing that occurs when a large amount of ink oozes out. It is possible to prevent deterioration of quality.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a stamp device according to an embodiment, showing a state where an ink impregnated body is in a first position separated from a heat-sensitive stencil sheet. This stamping device has a heat-sensitive stencil sheet 3 (hereinafter abbreviated as stencil sheet) whose both ends are wound in a roll shape inside a housing 1.
Is housed and is roughly configured. The right end of the base paper 3 in the figure is wound around the original spool 5, and the left end thereof is wound around the take-up spool 7. Original spool 5 and take-up spool 7
Are rotatably supported with respect to the housing 1.

As shown in FIG. 3, the base paper 3 is constructed by laminating a thermoplastic film 9 and a porous support 13 with an adhesive layer 11 and laminating them together. In this embodiment, the thermoplastic film 9 is a polyethylene terephthalate film having a thickness of 2 μ (hereinafter abbreviated as PET film), but other films such as polypropylene and vinylidene chloride-vinyl chloride copolymer may be used. Good.
The PET film preferably has a thickness of 1 μm to 4 μm. If it is less than 1 μm, the manufacturing cost is high and the strength is low and not practical, and if it exceeds 4 μm, the thermal head having a rating of about 1 mJ / dot is too thick to perforate. On the other hand, the porous support 13 of this embodiment is made of, for example, a natural fiber such as Manila hemp, Kozo, Mitsumata, synthetic fiber such as PET, polyvinyl alcohol, polyacrylonitrile, and semi-synthetic fiber such as rayon as a main raw material. Thin paper is used. Then, the base paper 3 thus configured
Is wound so that the surface of the thermoplastic film 9 faces outward in FIG.

Next, the transport path of the base paper 3 will be described with reference to FIG. The base paper 3 pulled out from the original spool 5 is a cylindrical boss 15 formed integrally with the housing 1.
Be transported to. Above the cylindrical boss 15, a leaf spring 19 having a felt 17 at its tip is attached. The L-shaped bent end of the leaf spring 19 is supported by the housing 1, and the felt 17 at the tip of the leaf spring 19 is elastically deformed so as to constantly press the cylindrical boss 15. As a result, a predetermined frictional force is applied to the base paper 3 conveyed between the felt 17 and the cylindrical boss 15.

Next, the base paper 3 pulled out from the cylindrical boss 15 is wound up on the winding spool 7 via the platen 21, the original winding side guide roller 23, and the winding side guide roller 25. A torsion coil spring 27 is wound around one end of the take-up spool 7. The original winding side guide roller 23 constitutes the first supporting body of the present invention, and the winding side guide roller 25 constitutes the second supporting body. The arm formed at the end of the torsion coil spring 27 is
The take-up spool 7 is engaged with a shaft 29 formed integrally with the housing 1 so that the take-up spool 7 is on the loose side with respect to clockwise rotation of the take-up spool 7 and is on the tightened side with respect to counterclockwise rotation. Is wrapped around. As a result, the load is small with respect to the rotation of the take-up spool 7 in the winding direction (clockwise direction), and the load is extremely large with respect to the rotation of the take-up spool 7 in the direction in which the base paper 3 is pulled back (counterclockwise direction). It is getting bigger.

Next, the platen 21 is rotatably fitted in the housing 1. A platen drive gear 22 is attached to one end of the platen 21, and the rotational drive is transmitted via the platen drive gear 22. In addition, a cylindrical guide 3 is provided at the center of the upper part of the housing 1.
1 is formed integrally with the housing 1. A grip unit 32 is slidably inserted in the vertical direction in the cylindrical guide 31.

As shown in FIG. 4, the grip unit 32 includes a grip 33, a cylindrical member 35, and a compression coil spring 4.
1 is comprised. The grip 33 has a multi-stepped shape in which the diameter gradually decreases, and a grip portion 33a for gripping with a hand is provided at the upper end. The grip 33 has a cylindrical portion 33b fitted in the cylindrical guide 31 so as to be vertically movable.
Adjacent to the upper part thereof, there is provided an abutting part 33c having a diameter larger than that of the cylindrical part 33b and abutting on the upper end face 31a of the cylindrical guide 31. Further, a compression coil spring 43 described later is provided between the outer peripheral portion of the grip portion 33a and the cylindrical portion 33b and the contact portion 33c.
A space portion 33d for accommodating is provided (see FIG. 1). The upper end surface 31a and the contact portion 33c form the pressing force adjusting means of the present invention. Further, a total of four claws 37 projecting toward the outer peripheral side are formed on the lower end portion of the grip 33 at a plurality of locations divided in the circumferential direction. On the other hand, the cylindrical member 35 is formed with four engagement holes 39 that are long in the axial direction, and the grip 33 is attached to the cylindrical member 3.
The four hooks 37 are respectively engaged with the engagement holes 39 by being fitted to the hooks 5. A flange 38 is formed at the lower end of the cylindrical member 35, and the flange 3
A male threaded portion 40 is formed on the lower side of 8. The compression coil spring 41 is inserted between the grip 33 and the cylindrical member 35, and generates a biasing force that separates the grip 33 and the cylindrical member 35 from each other. Since the spring force of the compression coil spring 41 is set to such a magnitude that the claw 37 is not deformed by creep deformation, the grip 33 and the cylindrical member 35 are not separated from each other.

The grip unit 3 constructed in this way
2, the grip 33 and the cylindrical member 35 are prevented from rotating relative to each other, and relative movement in the axial direction is possible, and the grip 33 is resisted against the biasing force of the compression coil spring 41.
And the cylindrical member 35 are pressed against each other, the claw 3
7 and the engaging hole 39 can be moved toward and away from each other by an axial gap. As shown in FIG. 1, this grip unit 32 is provided between the housing 1 and another compression coil spring 4.
It is attached via 3 and is always urged upward by the force of the compression coil spring 43. The grip 33 constitutes the grip of the present invention.

Next, below the grip unit 32,
The ink pad unit 45 is arranged. As shown in FIG. 5, the ink pad unit 45 includes an ink pad cartridge 47, an ink pad holder 49, an ink pad 51, and a leaf spring 53. The ink pad 51 is formed of a porous elastic body so as to be able to impregnate the ink, and has an upper surface adhered and fixed to the ink pad holder 49. The ink pad 51 constitutes the ink impregnated body of the present invention. The ink pad holder 49 has a box shape, and the male screw portion 4 of the cylindrical member 35 is provided on the upper surface thereof.
A female screw portion 55 and a claw 57 that are screwed with 0 are integrally formed. The ink pad cartridge 47 also has a box shape, and a rectangular through hole 48 is formed on the upper surface thereof.
The inside is sized to accommodate the ink pad holder 49. The leaf spring 53 is substantially H-shaped, and a clearance hole 59 for the female screw portion 55 of the ink pad holder 49 and a notch portion 61 with which two claws 57 of the ink pad holder 49 are engaged are formed in the central portion thereof. Has been done. Further, the total length of the four arm portions 63 of the leaf spring 53 is set longer than the through hole 48 of the ink pad cartridge 47. The leaf spring 53 is attached to the ink pad holder 49 by engaging the center portion of the leaf spring 53 with the claws 57 at two locations.
The arm portion 63 of the book is brought into contact with the upper surface of the ink pad cartridge 47. Therefore, the ink pad holder 4
9 is constantly urged to the ink pad cartridge 47 by the force of the leaf spring 53 so that the ink pad 51 does not protrude downward from the lower surface of the ink pad cartridge 47 (see FIG. 1). The ink pad holder 49 constitutes the outer frame of the present invention.

The ink pad unit 45 thus constructed is inserted into the housing 1 through the opening 65 formed in the side surface of the housing 1, as shown in FIG. Ink pad cartridge 47
Is guided by the guide groove 67 in a state of being inserted into the housing 1 so as not to move in the housing 1. In addition, the female screw portion 5 of the ink pad holder 49
5 is screwed into the male thread portion 40 of the cylindrical member 35, whereby the ink pad holder 49 moves the ink pad cartridge 4 as the grip unit 32 moves up and down.
It can move up and down inside 7.

Next, as shown in FIG. 2, a latch claw 69 is arranged inside the housing 1. Latch claw 6
9 is rotatably supported by a shaft 71 integrally formed with the housing 1. The latch claw 69 is formed by three arms. The first arm 73 contacts the cylindrical member 35, the second arm 75 has a tension coil spring 79 attached thereto, and the third arm 77 has a third arm 77. Is in contact with the button key 81. The other end of the tension coil spring 79 is attached to the housing 1, and the spring force causes the latch claw 6 to move.
Biasing 9 in the counterclockwise direction. Further, the button key 81 is provided with a guide groove 8 formed integrally with the housing 1.
3 is slidably supported in the axial direction, and the third arm 77 of the latch pawl 69 is supported by the spring force of the compression coil spring 85 arranged between the flange portion formed at the end of the shaft 3 and the housing 1. Is abutted against. Here, the spring force of the tension coil spring 79 is set stronger than the spring force of the compression coil spring 85, whereby the latch pawl 69
The first arm 73 is always in contact with the outer periphery of the cylindrical member 35.

A frame 84 is arranged below the ink pad unit 45. The frame body 84 is fixed to the housing 1 by attaching the peripheral wall portion thereof to the housing 1. In addition, a hole 88 corresponding to the size of the stamp plate to be printed is formed in the center of the frame 84. The size of the hole 88 is the same as the ink pad 51 described above.
It is one size smaller than the size of.

Next, the base paper 3 of the stamp device having the above structure is subjected to plate making with desired characters by the plate making device 86 shown in FIG. The plate making device 86 shown in FIG.
The plate making unit 89 and the liquid crystal display 91 having a predetermined number of digits are provided. The plate head 89 has a thermal head 9
3, base paper feed gear 95, take-up spool drive cam 97,
A release lever 96 is arranged. As shown in FIG. 1, the thermal head 93 and the base paper feed gear 95 can be brought into and out of contact with the platen 21 and the platen drive gear 22 of the stamp device by interlocking with two positions of setting and releasing the release lever 96. Has been done. The solid line in FIG. 1 indicates the contact position, and the chain double-dashed line indicates the separation position. The take-up spool drive cam 97 can be engaged with the take-up spool 7. Thermal head 9
3 is brought into contact with the platen 21 via the base paper 3 and is energized in that state to thermally perforate the thermoplastic film 9 of the base paper 3. The raw paper feed gear 95 and the take-up spool drive cam 97 are both driven by a raw paper feed motor (not shown). The base paper feed gear 95 meshes with the platen drive gear 22 to convey the base paper 3 by a predetermined amount, and the take-up spool drive cam 97 applies a take-up torque for winding the conveyed base paper 3 to the take-up spool 7. ing.

Next, the operation of the stamp device having the above construction will be described. FIG. 1 shows the ink pad 5 as described above.
1 indicates a first position separated from the base paper 3, and the plate making device 8
6 shows a state of being attached to No. 6 for plate making. In this state, the thermal head 93 is in pressure contact with the platen 21 via the base paper 3, and the base paper feed gear 95 meshes with the platen drive gear 22. A take-up spool drive cam 97 is engaged with the take-up spool 7. In this state, print information is input from the input unit 87 of the plate making device 86, and finally a print start command is input. The base paper feed motor is rotationally driven according to the print start command, and the driving force is supplied to the platen drive gear 2 via the base paper feed gear 95.
2, the platen 21 rotates clockwise. Since the base paper 3 is pressed against the platen 21 and the thermal head 93, the base paper 3 is conveyed by the frictional force between the platen 21 and the base paper 3. At this time, back tension is applied to the base paper 3 by the frictional force between the felt 17 and the base paper 3 in the direction opposite to the conveying direction.

On the other hand, the thermal head 93 is used in the plate making device 8
A control unit (not shown) 6 heats the thermoplastic film 9 surface of the base paper 3 by heating at a predetermined timing according to the print information to form a predetermined perforated image on the base paper 3. Base paper 3 sent out from the platen 21
Is wound by the winding torque transmitted to the winding spool 7 via the winding spool drive cam 97. This winding torque is based on the base paper feed motor and the winding drive cam 9
It is generated by a well-known slip mechanism (not shown) interposed between the slip mechanism and the slide mechanism. Therefore, the base paper 3 is wound around the winding spool 7 by the amount conveyed by the platen 21. Even after the energization of the thermal head 93 is finished and the punched image is formed, the raw paper 3 is conveyed until the punched image area faces the hole 88 of the frame body 84.

When plate making in the stamp device is completed in this way, as shown in FIGS.
Is pushed down to move the ink pad 51 to the second position where it is in close contact with the base paper 3. In this case, first, the grip 33 is pushed down against the spring force of the compression coil spring 43, so that the cylindrical member 35 is pushed by the compression coil spring 41 and moves downward while being guided by the cylindrical guide 31. At this time, the ink pad holder 49
Is coupled to the cylindrical member 35 by a screw, and therefore moves downward while resisting the spring force of the plate spring 53 in accordance with the movement of the cylindrical member 35 while being guided by the peripheral wall portion of the ink pad cartridge 47. In this way, the ink pad 51 comes into close contact with the base paper 3, moves further downward, and contacts the frame body 84 via the base paper 3. When the cylindrical member 35 further descends, the peripheral portion of the ink pad 51 is compressed by the frame 84 by a predetermined amount, and the upper edge of the cylindrical member 35 is latched by the latch claw 6.
Reach 9. Then, the latch claw 69 is rotated counterclockwise by the spring force of the tension coil spring 79, and the first arm 73 of the latch claw 69 is engaged with the upper end surface of the cylindrical member 35. The spring force of the tension coil spring 79 is the compression coil spring 43 that pushes the cylindrical member 35 upward.
And the spring force of the leaf spring 53 that pushes the ink pad holder 49 upward. Therefore, the latch claw 69 is firmly engaged with the compression coil spring 43 and the leaf spring 53 without being pushed back. In this state, the base paper 3 is pressed against the outer edge portion of the punched image area by the frame 84 and the ink pad 51, so that the frame 84 and the ink pad 51 are substantially in contact.
It is designed so that it does not deviate from it. The above is the operation when the stamp device is mounted on the plate making device 86.

Next, referring to FIG. 6, the release lever 96
The thermal head 9 by moving the
3 and the base paper feed gear 95 are separated from the platen 21 and the platen drive gear 22, respectively, and the stamp device is removed from the plate making device 86. Then, as shown in FIG. 9, the stamp device is placed so that the punched image area of the base paper 3 faces the position where the printing paper 98 should be printed, and the grip 33 is pushed down in this state. Then, the compression coil spring 41 inside the cylindrical member 35 is compressed, and the ink pad 51 in contact with the printing paper 98 via the base paper 3 is elastically deformed by the spring force according to the amount of compression. When the grip 33 is further pushed down, the upper end surface 31a of the cylindrical guide 31 of the housing 1 comes into contact with the contact portion 33c of the grip 33, and the grip 33 is no longer lowered.

In this state, the predetermined spring force of the compression coil spring 41 elastically deforms the ink pad 51 by a predetermined amount, and ink corresponding to the elastic deformation amount of the ink pad 51 is transferred from the perforated portion of the base paper 3 to the printing paper 98 side. The bleeding begins and the image is transferred onto the printing paper 98. At this time, even if the grip 33 is further pushed down, the contact portion 3 of the grip 33
3c is an upper end surface 31a of the cylindrical guide 31 of the housing 1.
Since it is in contact with, the pushing force is only transmitted to the printing paper 98 via the housing 1 and the frame 84. For this reason, the ink pad 51 is not compressed by a predetermined amount or more, and therefore it is possible to prevent deterioration of the print quality caused by a large amount of ink oozing out. Since the ink pad 51 is an elastic body, the printing paper 9
It is deformed according to the unevenness of 8 and local blur is unlikely to occur. Further, since the compression coil spring 41 is interposed between the grip 33 and the ink pad 51, uniform pressure can be applied to the stamp surface.

By the way, in the stamp device,
After printing an arbitrary number of sheets on the same plate, it is possible to print on another new plate. In this case, before attaching the stamp device to the plate making device 86 for plate making, the ink pad 5
1 is moved from the second position in close contact with the base paper 3 to the first position separated from the base paper 3. That is, in FIG. 8, by pushing the button key 81 against the spring force of the tension coil spring 79, the latch pawl 9 is rotated clockwise to release the latch. When the latch is released, the ink pad holder 49 is pushed upward by the spring force of the compression coil spring 43 and the leaf spring 53, and moves until the upper surface of the ink pad holder 49 contacts the lower surface of the ink pad cartridge 47. That is, by pressing down the button key 81, the ink pad 5
1 moves to a first position separated from the base paper 3. Next, the stamp device is attached to the plate making device 86 with the release lever 96 of the plate making device 86 in the release position. Next, by moving the release lever 96 to the set position, the plate making device 86 is brought into the same state as described above, and the same plate making process is performed.

Further, in the stamp device having the above-mentioned structure, the ink pad unit 45 is used for changing the color of the ink and supplementing the ink.
It can be easily done by exchanging. This will be described with reference to FIGS. 1 and 10. First, in FIG. 1, by turning the grip 33 counterclockwise, the screw tightening of the male screw portion 40 of the cylindrical member 35 and the female screw portion 55 of the ink pad holder 49 is released. As a result, the grip unit 32 is pushed upward by the spring force of the compression coil spring 43, and the cylindrical member 35 moves until the upper surface of the flange 38 contacts the lower end surface of the cylindrical guide 31 of the housing 1. FIG. 10 shows the state at the moving end. In FIG. 10, the ink pad unit 4
5 can be removed by pulling out from the opening 65 of the housing 1 to the left side in the drawing. The ink pad unit 45 can be attached in the reverse operation of this procedure.

As described above, in the stamp device having the above-described structure, the ink pad unit 45 can be replaced very easily, and the hands and clothes are not soiled when the ink color is changed or the ink is replenished.

It should be noted that the present invention is not limited to the embodiments described above, and can be implemented in various modes without departing from the gist of the present invention. For example,
In the above-described embodiment, when the ink pad 51 is in the second position in close contact with the base paper 3, the state is held by the engagement of the latch claw 69 and the cylindrical member 35, and at the time of printing. Although the grip 33 is further pushed down, the printing may be performed directly when the ink pad 51 is moved to the second position in which it is in close contact with the base paper 3 without providing the latch claw 69. .

[0028]

As is apparent from the above description,
The stamp device according to claim 1 is provided on an ink impregnation body, a heat-sensitive stencil sheet on which a perforation image is formed, which is detachably provided on one side surface of the ink impregnation body, and on the other side surface of the ink impregnation body. And an outer frame that supports the ink impregnated body, a grip portion provided on the outer frame, and a pressing force adjusting unit that prevents the ink impregnated body from being compressed by a predetermined amount or more at the time of marking. Therefore, the ink impregnated body is not compressed more than a predetermined amount, and therefore it is possible to prevent the deterioration of the print quality caused by the large amount of ink oozing out.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which an ink impregnated body is separated from a heat-sensitive stencil sheet in a stamp device according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the stamp device orthogonal to FIG.

FIG. 3 is a sectional view of a heat-sensitive stencil sheet.

FIG. 4 is an exploded perspective view of the grip unit.

FIG. 5 is a perspective view of an ink pad unit.

FIG. 6 is a perspective view of a plate making device.

FIG. 7 is a cross-sectional view showing a state in which the ink impregnated body of the stamp device is in close contact with the heat-sensitive stencil sheet.

FIG. 8 is a side sectional view of the stamp device orthogonal to FIG.

FIG. 9 is a cross-sectional view showing a state where printing is performed by the stamp device.

FIG. 10 is a cross-sectional view showing a state when the ink pad unit of the stamp device is replaced.

[Explanation of symbols]

 1 Housing 3 Heat-sensitive stencil sheet 31a Upper end face 33 Grip 33c Contact part 49 Ink pad holder 51 Ink pad

Claims (1)

[Claims] 1. An ink impregnated body impregnated with ink, a heat-sensitive stencil sheet on which a perforated image is formed and which is detachably provided on one side surface of the ink impregnated body, and is provided on the other side surface of the ink impregnated body. An outer frame that supports the ink impregnated body, a grip provided on the outer frame, and a pressing force adjusting unit that prevents the ink impregnated body from being compressed by a predetermined amount or more at the time of marking. A stamp device characterized in that