JPH0776159A - Stamp device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a stamp device capable of printing a printed matter of uniform density without blur even when printing is performed using a stencil printing plate provided with a rail portion for protecting a printing surface. . When the pressing member 3 is pressed, the stencil printing plate 5 is subjected to a pressing force from the film 53 side through the pad 11 provided on the pressing member 3 to deform the frame 51 while printing. It is brought into contact with the paper 21. When the stencil printing plate 5 is brought into contact with the printing paper 21, the ink impregnation member 52
The ink impregnated in the ink permeates the perforated portion of the heat-sensitive stencil sheet 50, and the perforated image is printed on the printing paper 21. At this time, the decrease in the pressing force due to the elastic restoring force generated in the frame body 51 deformed with the tip of the rail portion 51a as the starting point is mitigated by the increase in the pressing force by the pad protruding portion 11b of the pad 11 of the pressing member 3, A uniform pressing force is applied to the stamp surface 55.

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 stencil printing plate, and more particularly, a pad projecting part of a pressing member is provided at a position corresponding to a frame projecting part of the stencil printing plate.
The present invention relates to a stamp device capable of printing a printed matter having a uniform density without blurring.

[0002]

2. Description of the Related Art A conventional stamping apparatus using this type of stencil printing plate is disclosed in Japanese Patent Laid-Open No. 63-17074. As shown in FIG. It is composed of a hand-push stamp holder 60 having an adhesive layer 62, and a stencil printing original plate 63 adhered to the adhesive layer 62 of the hand-push stamp holder 60. The stencil printing plate 63 includes a heat-sensitive stencil sheet 64 on which a perforated image is formed in advance, a frame body 65, and a cover sheet 66, which are laminated in this order. The frame body 65 has the perforated image on the cover sheet 66 side. An opening that is exposed to the inside is formed, and the opening is filled with ink.

In the stamp device having such a structure, the stencil printing master plate 63 is mounted on the manual stamp stamp holder 60 by adhering the cover sheet 66 side of the stencil printing master plate 63 to the adhesive layer 62 of the manual stamp stamp holder 60. To print.

However, since there is no means for protecting the printing surface in the stencil printing plate 63, there is a drawback that the printing surface is scratched or the printing surface is erroneously touched and the hand or the object to be printed is soiled.

As a means for solving this problem, as shown in FIG. 3, in order to protect the stamp surface 55, a stencil printing plate having rail portions 51a protruding from the stamp surface 55 side of the frame 51 on both sides of the stamp surface 55. No. 5 is the applicant's application No. 4-35
No. 338 is pending.

[0006]

However, when the stencil printing plate 5 on which the rail portion 51a is formed is attached to the conventional hand-push stamp holder 60 and pressed against the printing paper, the frame 51 has the printing paper side. Rail part 51 protruding to
Since a is formed, the frame body 51 is deformed into an arc shape, and as a result, an elastic restoring force is generated in the frame body 51. Frame 5
Since 1 is deformed starting from the tip of the rail portion 51a, this elastic restoring force largely acts around the rail portion 51a in the direction opposite to the pressing direction.

Therefore, the cushion layer 61 around the rail portion 51a receives a large force in the direction opposite to the pressing direction due to the elastic restoring force, and is compressed and deformed in the direction of the force.
Therefore, the pressing force applied to the stamp surface 55 around the rail portion 51a is smaller than the pressing force applied to the other stamp surfaces 55, so that the pressing force applied to the stamp surface 55 at the time of printing becomes uneven. .

That is, since the pressing force at the time of printing is reduced in the vicinity of the rail portion 51a, the printing is blurred. On the other hand, if the pressing force is increased in order to prevent the scraping around the rail portion 51a, the pressing force at the time of printing becomes too large in a portion other than the periphery of the rail portion 51a, which causes blurring in printing. There was a point.

The present invention has been made to solve the above-mentioned problems, and is free from blurring even when printing is performed using a stencil printing plate provided with a frame protruding portion for protecting the printing surface. It is an object of the present invention to provide a stamp device capable of printing a printed matter having a uniform density.

[0010]

In order to achieve this object, a stamp device according to a first aspect of the present invention is an ink impregnated body impregnated with ink, a frame body provided on the periphery of the ink impregnated body, and the ink. An original plate for stencil printing, which is provided on one side of the impregnated body and has a perforated image formed thereon, and an ink impermeable base material provided on the other side of the ink impregnated body, and the stencil printing A pressing member for applying a pressing force from the base material side of the original plate for printing a perforated image formed on the stencil sheet on an object to be printed with the ink impregnated in the ink impregnated body, and further, The frame has a frame projecting portion that projects toward the stencil sheet, the pressing member includes a pad that presses the stencil sheet, and the pad has a pad projecting portion on a surface facing the stencil sheet. have.

According to a second aspect of the present invention, in the stamp apparatus according to the first aspect, the pad protrusion is provided at a position corresponding to at least the frame protrusion.

According to a third aspect of the present invention, in the stamp apparatus according to the first or second aspect, the tip of the pad protrusion is rounded.

A stamp device according to a fourth aspect is the stamp device according to any one of the first to third aspects, in which a corner portion of a peripheral surface of the pad is rounded.

[0014]

In the stamp apparatus having the above-mentioned structure, when the pressing member is pressed, the stencil printing plate is
A pressing force is applied from the base material side through a pad provided on the pressing member, and the frame body is deformed and pressed against the printing object. When the stencil printing plate is pressed against the printing material, the ink impregnated in the ink impregnated body oozes out from the perforated portion of the stencil printing paper, and the perforated image is printed on the printing material.

At this time, the reduction of the pressing force due to the elastic restoring force generated in the frame body deformed with the tip of the frame projecting portion as a starting point is provided on the surface of the pad of the pressing member facing the stencil printing plate. The increase in the pressing force due to the pad protrusion portion reduces the pressure, and a uniform pressing force is applied to the stamp surface.

In the stamp device according to the second aspect of the present invention, since the pad projecting portion is provided at a position corresponding to the frame projecting portion, the elastic restoring force generated in the deformed frame body starting from the tip of the frame projecting portion at the time of printing. The decrease in the pressing force due to is further effectively alleviated by the increase in the pressing force due to the pad protruding portion, and a uniform pressing force is given to the stamp surface.

In the stamp device according to the third aspect of the present invention, since the tip of the pad protrusion that contacts the base material of the stencil printing plate is rounded during printing, the pressure at the time of contact between the tip of the pad protrusion and the base material is reduced. Will be alleviated.

In the stamp device of the fourth aspect, since the corners of the peripheral surface of the pad are rounded, the pressure at the time of contact between the corners of the peripheral surface of the pad and the base material is relaxed.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1A and 1B are cross-sectional views of the stamp device of this embodiment in a non-printing state. The stamp device 1 of the present embodiment includes a grip 2, a pressing member 3 arranged below the grip 2, a stencil printing plate 5 arranged below the pressing member 3, a pressing member 3 and a stencil printing plate. 5, a stamp cover 4 configured to surround the stamp cover 5, and the stamp cover 4 provided inside the stamp cover 4
And a tension spring 19 that is lifted upward in the stamp cover 4 and the stencil printing plate 5 provided in the stamp cover 4.
And a compression spring 20 that pushes the grip 2 upward while the grip 2 is not pressed down.

The handle 2 is composed of a grip portion 9, a pillar portion 17, a notch portion 8 and a spherical surface portion 7. At the upper end of the handle 2, a rectangular parallelepiped grip portion 9 that is pressed by an operator is provided. A columnar portion 17 having a columnar shape is provided below the grip portion 9 and is inserted into the guide portion 18 of the stamp cover 4 so as to move up and down. A columnar notch 8 having a smaller radius than the column 17 is provided below the column 17, and the pressing member 3 and the handle 2 described later are engaged with each other in the notch 8. Below the notch 8 and at the lower end of the handle 2,
A spherical portion 7 having a spherical shape is provided in the downward direction, and the distal end of the spherical portion 7 is arranged so as to contact the pad holder 10 of the pressing member 3.

FIG. 3 shows a sectional view of the stencil printing plate 5. In this example, the previously filed application No. 4-35338.
The stencil printing plate 5 having the same structure as that disclosed in the above-mentioned application is adopted. This stencil printing plate 5 has a rectangular ink impregnation member 52 as an ink impregnation body impregnated with ink, a frame body 51 having a rectangular opening for accommodating the ink impregnation member 52 formed therethrough, and ink impregnation. Member 52
A known heat-sensitive stencil sheet 50 provided as a stencil sheet on one side of which a perforated image is formed, and an ink impregnating member 5.
2 and an ink impermeable film 53 as an ink impermeable substrate provided on the other side surface.

The frame 51 is integrally formed of a synthetic resin material, and has a rail portion 51a as a frame projecting portion projecting toward the heat-sensitive stencil sheet 50 side and a leaf spring engaging portion projecting toward the film 53 side. 51b and. Rail part 51a
Are rail-shaped at both longitudinal ends of the stencil printing plate 5, and prevent the printing surface 55 from being inadvertently contacted when the stencil printing plate 5 is left with the stamp surface 55 facing downward. As a result, the stamp surface 55 is prevented from being damaged, or the object contacting the stamp surface 55 is prevented from becoming dirty. The leaf spring engaging portion 51b is formed in an inverted L shape, is engaged with the leaf spring 6, and is used for mounting the stencil printing plate 5 on the stamp cover 4.

The heat-sensitive stencil sheet 50 and the film 53 are adhered to the frame body 51 by a double-sided tape 54 in order to seal the ink impregnating member 52. The reason why the heat-sensitive stencil sheet 50 is not adhered to the frame 51 with an adhesive is that wrinkles do not occur on the printing surface 55 of the heat-sensitive stencil sheet 50. Since the adhesive is solidified by the adhesion, when the two are adhered by the adhesive, the heat-sensitive stencil sheet 50 and the frame body 51 having different thermal expansion coefficients expand differently due to the change of the environmental temperature, and as a result, Wrinkles are generated on the printing surface 55 of the heat-sensitive stencil sheet 50. When printing is performed with the wrinkles on the stamp surface 55, the perforated image cannot be printed neatly. Therefore, in order to prevent the wrinkles, the heat-sensitive stencil sheet 50 is adhered to the frame body 51 by the double-sided tape 54 which is an adhesive. This is because the double-sided tape 54, which is an adhesive, acts as a cushioning material, and thus wrinkles can be prevented from occurring.

The ink impregnation member 52 is made of a 20 ° acrylonitrile butadiene rubber (NBR) porous body in a sponge hardness meter (Asker C type), and is impregnated with an oil ink. If the hardness of the ink impregnating member 52 is too hard, contact with the printing object becomes uneven during printing, causing blurring, and if it is too soft, when a perforating means such as a thermal head is pressed against the stencil printing plate 5. Since the perforation of the heat-sensitive stencil sheet 50 becomes unstable and a desired perforated image cannot be obtained, the hardness of the ink impregnating member 52 is practically 5 ° to 40 ° in a sponge hardness meter.

As the film 53, a polyethylene terephthalate film (PET film) having a thickness of 75 μm is suitable. If it is thicker than this, the strength of the PET film becomes too strong and an extremely large pressing force is required at the time of printing, while if it is thinner than this, the durability of the PET film deteriorates.

The film 53 can be formed integrally with the frame body 51 by partially forming the frame body 51 thinly. That is, instead of adhering the film 53 to the frame 51, a bottomed opening is formed in the frame 51, the bottom is formed thinly, and the ink impregnating member 52 is housed in the opening, and the film is heat-sensitive. It is also possible to cover with the stencil sheet 50.

An original plate 5 for stencil printing having the above structure
Is perforated with a perforated image on the heat-sensitive stencil sheet 50 by a plate-making device (not shown).

FIG. 4 shows a perspective view of the pressing member 3. In addition, in order to facilitate understanding of the engagement relationship between the pressing member 3 and the handle 2, the handle 2 is shown in a part of the upper portion of FIG. The pressing member 3 is a pad holder 10 made of a metal having a C-shaped cross section and having an opening at the top, and a pad 1 that is adhered and fixed to the lower surface of the pad holder 10 to press the stencil printing plate 5.
It is composed of 1.

The pad holder 10 is bent so that the mounting groove 12 with which the notch portion 8 of the handle 2 is engaged and the two spring hook portions 13 with which the tension springs 19 are engaged are located on the upper surface. Has been formed. Since the axial length of the cutout portion 8 of the handle 2 is larger than the thickness of the pad holder 10 that constitutes the mounting groove 12, the pressing member 3 is used for automatic alignment described later within a predetermined angle range. Mounting groove 12 so that it can be rotated
Engages with the cutout 8. Further, due to the engagement between the mounting groove 12 and the cutout portion 8, the pressing member 3 is operated in conjunction with the vertical movement of the handle 2.

The pad 11 is made of an elastically deformable rectangular plate made of resin or rubber, and has a size smaller than the inner circumference (opening) of the frame 51 and larger than the printing range. The corners of the pad 11a, which are the corners of the peripheral surface of the pad 11, are provided with rounded arcs each having a radius of approximately 1.5 mm in four corners. The roundness attached to the corner portion 11a of the pad relieves the pressure at the time of contact between the pad 11 and the film 53 of the stencil printing plate 5 during printing, so that the durability of the film 53 is increased and the product of the stencil printing plate 5 is increased. It has the effect of extending the life. The pad corner 11a
The larger the arc is, the more durable the film 53 is.

On the surface of the pad 11 facing the stencil printing plate 5, a pad protrusion corresponding to the pair of rail portions 51a of the frame body 51 and protruding from the central portion toward the stencil printing plate 5 side by about 2 mm. The portion 11b is provided integrally with the pad 11. A circular arc-shaped ridgeline having a radius of about 1 mm is attached to the tip of the pad protrusion 11b as a roundness.
The roundness provided at the tip of the pad protruding portion 11b relaxes the pressure at the time of contact between the pad 11 and the film 53 of the stencil printing master plate 5 at the time of printing, like the roundness provided at the pad corner portion 11a. This has the effect of increasing the durability of 53 and extending the product life of the master plate 5 for stencil printing.
The roundness of the tip of the pad protrusion 11b also relieves the pressure applied to the tip of the pad protrusion 11b during printing, and thus improves the durability of the pad 11 itself.

The pad protrusion 11b is formed by the pad 11
It is also possible to gradually increase the thickness from the central part to the peripheral part.

As shown in FIG. 1, the stamp cover 4 is
A box-like shape with an open bottom is formed so as to surround the pressing member 3, and a guide portion 18 that allows the handle 2 to move up and down is formed in the center of the upper portion. A compression spring 20 is attached to the outer periphery of the guide portion 18 between the upper surface of the stamp cover 4 and the grip portion 9 to push the handle 2 upward. The opened bottom of the stamp cover 4 guides the stencil printing plate 5 so that it can move up and down.

As shown in FIG. 1A, the upper ends of two tension springs 19 whose lower ends are attached to the spring hooks 13 of the pad holder 10 are attached to the upper surface of the inner wall of the stamp cover 4, respectively. , The pressing member 3 is pulled upward.

As shown in FIG. 1 (b), inside the stamp cover 4, two leaf springs 6 serving as holding means for the stencil printing plate 5 are provided. The leaf spring 6 is formed in an inverted U-shape, one end of which is fixed to a protrusion 4a provided in the stamp cover 4, and the other end of which is a claw portion formed at the tip of the leaf spring of the stencil printing plate 5. It is engaged with the engaging portion 51b. The leaf spring 6 has a shape that bends up and down so as to follow the vertical movement of the stencil printing plate 5.

The leaf spring 6 and the master plate 5 for stencil printing are engaged by the operator inserting the master plate 5 for stencil printing into the stamp cover 4 so that the claw portion formed at the tip of the plate spring 6 is used for stencil printing. Guided to the upper surface of the leaf spring engaging portion 51b of the original plate 5,
The leaf spring 6 is bent in the stamp cover 4 toward the guide portion 18, and the leaf spring engaging portion 51b is guided above the claw portion of the leaf spring 6. The stencil printing plate 5 is detached from the leaf spring 6 by releasing the claw portion formed at the tip of the leaf spring 6 toward the guide portion 18 side in the stamp cover 4 by a release means (not shown). This is performed by removing the claw portion 6 of the plate spring engaging portion 51b.

Next, the operation of the stamp device 1 of the present invention will be described.

1 (a) and 1 (b), since the pressing member 3 is pulled upward by the tension spring 19 when the stamp device 1 is placed on the printing paper 21 which is the object to be printed, The stencil printing plate 5 does not come into contact with the printing paper 21 and the printing paper 21 does not become dirty.

Next, when the operator pushes down the handle 2 against the force of the tension spring 19 and the compression spring 20, the handle 2 is guided by the guide portion 18 of the stamp cover 4 and moved downward. The pressing member 3 is also moved downward in conjunction with the downward movement of the handle 2, and first, the pad 11 of the pressing member 3 comes into contact with the film 53 of the stencil printing plate 5. After that, as the handle 2 moves downward, the pressing member 3 and the stencil printing plate 5 are both moved downward until the rail portion 51a of the frame 51 of the stencil printing plate 5 comes into contact with the printing paper 21. Be moved.

As shown in FIGS. 2A and 2B, when the handle 2 is further pushed down by the operator, the printing paper 2
Following the inclination of 1, the pressing member 3 is rotated around the spherical surface portion 7 of the handle 2. That is, the pressing member 3 is automatically aligned according to the inclination of the stamp surface 55.

When the handle 2 is further pushed down, the frame body 51 of the stencil printing plate 5 is deformed with the tip of the rail portion 51a as a starting point, and the stamp surface 55 is brought into contact with the printing paper 21.
At this time, the elastic restoring force generated in the frame body 51 deformed with the tip of the rail portion 51a as a starting point reduces the pressing force of the stamp surface 55 around the rail portion 51a, but the pad 11 of the pressing member 3 projects to the pad 11. Since the portion 11b is provided at a position corresponding to the rail portion 51a, the pressing force is increased by the stamp surface 55 around the pad protruding portion 11b. As a result, the reduction of the pressing force around the rail portion 51a is alleviated, and the pressing surface 55 is given a uniform pressing force.

The stamp surface 55 of the stencil printing plate 5 is the printing paper 2
When the ink is impregnated into the ink impregnating member 52, the ink impregnated into the ink impregnating member 52 is exuded from the perforated portion formed on the heat-sensitive stencil sheet 50, and the perforated image is printed on the printing paper 21. Since the pressing force applied to the printing surface 55 is uniform as described above, a printed matter having a uniform density and no blurring is printed.

As is clear from the above description, in the stamp device 1 of this embodiment, the pad 11 of the pressing member 3 is used.
Since the pad protruding portion 11b is provided at a position corresponding to the rail portion 51a of the frame body 51, the pressing force of the stamp surface 55 at the time of printing is made uniform, and a printed matter of uniform density without blur can be printed. There is.

Further, since the tip of the pad protrusion 11b of the pad 11 and the pad corner 11a which come into contact with the film 53 of the stencil printing plate 5 are rounded, the pressure at the time of contact is relieved, Pad 11 and film 53
Has the effect of improving the durability of.

It should be noted that the present invention is not limited to the above embodiments, and it can be easily inferred that various improvements and modifications can be made without departing from the spirit of the present invention.

For example, in the above-described embodiment, the rail portions 51a protruding from both sides of the frame body 51 are shown as the frame body projecting portion, but it is also possible to form a columnar projecting portion from the four corners of the frame body 51. is there.

The position and shape of the pad protruding portion 11b are arranged corresponding to the rail portion 51a as the frame protruding portion, as long as the pressing force of the stamp surface 55 can be made uniform. The position and shape of the pad protrusion 11b can be freely changed.

[0049]

As is apparent from the above description, according to the stamping device of the first aspect, even when printing is performed using the stencil printing plate provided with the frame protruding portion, the pad of the pressing member can be printed. Has a pad protrusion, so when printing,
The decrease in the pressing force due to the elastic restoring force generated in the frame body deformed with the tip of the frame projecting portion as a starting point is mitigated by the increase in the pressing force by the pad projecting portion, and a uniform pressing force is given to the stamp surface. As a result, there is an effect that it is possible to print a printed matter of uniform density without blurring.

According to the stamp device of claim 2,
Since the pad protrusion is provided at a position corresponding to the frame protrusion, the pressing force on the printing surface during printing is more effectively equalized, and as a result, it is possible to print a printed matter of uniform density without blurring. There is.

According to the stamping device of the third aspect, since the tip of the pad protrusion that comes into contact with the base material of the stencil printing plate at the time of printing is rounded, the tip of the pad protrusion and the base material come into contact with each other. The pressure at the time is relieved, and there is an effect that the durability of the pad and the base material is improved.

According to the stamp device of the fourth aspect, since the corners of the peripheral surface of the pad are rounded, the pressure at the time of contact between the corners of the peripheral surface of the pad and the base material is relieved, and the base is It has the effect of improving the durability of the material.

[Brief description of drawings]

FIG. 1A is a cross-sectional view of a stamp device according to this embodiment. (B) is a longitudinal sectional view of the stamp device of the present embodiment.

FIG. 2A is a cross-sectional view showing a printing state of the stamp device. (B) is a longitudinal sectional view showing a printing state of the stamp device.

FIG. 3 is a sectional view of a stencil printing plate.

FIG. 4 is a perspective view showing a part of a handle and a pressing member.

FIG. 5 is a perspective view of a conventional stamp device.

[Explanation of symbols]

 3 Pressing member 5 Stencil printing master plate 11 Pad 11a Pad corner 11b Pad protrusion 50 Heat-sensitive stencil base paper 51 Frame 51a Rail part 52 Ink impregnation member 53 Film

Claims (4)

[Claims] 1. An ink impregnated body impregnated with ink, a frame body provided at a peripheral edge of the ink impregnated body, a stencil sheet provided on one side surface of the ink impregnated body and having a perforated image formed thereon, A stencil printing original plate having an ink impermeable substrate provided on the other side surface of the ink impregnated body, by applying a pressing force from the substrate side of the stencil printing original plate,
In a stamping device comprising a pressing member for printing a perforated image formed on the stencil sheet on an object to be printed with the ink impregnated in the ink impregnated body, the frame body is a frame body protruding toward the stencil sheet side. A stamp device having a protrusion, wherein the pressing member includes a pad that presses the stencil printing plate, and the pad has a pad protrusion on a surface facing the stencil printing plate. 2. The stamp device according to claim 1, wherein the pad protrusion is provided at a position corresponding to at least the frame protrusion. 3. The stamp device according to claim 1, wherein a tip of the pad protrusion is rounded. 4. The stamp device according to claim 1, wherein a corner portion of a peripheral surface of the pad is rounded.