JPH0668852U - Stamp device - Google Patents

Abstract

(57) [Summary] [Object] To provide a stamping device capable of printing with a uniform density even when using a stencil printing plate having rail-shaped protrusions. [Structure] The material, shape, and the like of the pressing member 3, that is, the pad holder 10 and the pad 11 are set so that the deformation amount of the entire surface of the pressing member 3 under a predetermined marking load is 0.2 mm or less.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stamp device using a stencil printing plate.

[0002]

[Prior art]

 A conventional stamping device using a stencil printing plate is disclosed in Japanese Patent Laid-Open No. 63-17074, which is composed of a hand-pushing stamp holder 60 having a cushion layer 61 and an adhesive layer 62. (See Figure 5). Next, in the stencil printing plate 63 used for this stamping device, a heat-sensitive stencil sheet 64 on which a perforated image is formed in advance, a frame body 65, and a cover sheet 66 are laminated in this order. Ink is applied to the opening of the.

In the stamp device having such a structure, the stencil printing master plate 63 is attached to 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. And print.

However, since there is no stencil printing plate 63 for guarding the stamp surface, there is a drawback that the stamp surface may be scratched or the stamp surface may be accidentally touched and the hands or non-printed matter may become dirty. .

As a means for solving this problem, a stencil printing plate provided with a rail-shaped protruding member for protecting the stamp surface around the stamp surface is disclosed in the specification attached to the application of Japanese Patent Application No. Hei 4-035338. Proposed in the drawing. This is composed of a heat-sensitive stencil sheet, a resin frame body on which a rail having a substantially H-shaped cross section is formed, an ink impregnating member arranged at the opening of the frame body, and a backup film are sequentially laminated. Is configured.

[0006]

[Problems to be solved by the device]

 However, when the stencil printing plate on which the rails are formed is mounted on a conventional hand-operated stamp holder and printed, the peripheral part of the rails of the frame has a large elastic restoring force, and therefore the peripheral part of the pressing member composed of a cushion layer. Will be deformed by compression and will drip. For this reason, the printing surface has a convex shape at the center, and the printing surface pressure for non-printed matter becomes uneven. That is, a large pressure is generated in the central portion of the printing surface, and bleeding occurs, and a small pressure is generated in the peripheral portion of the printing surface, causing blurring.

The present invention has been made in order to solve the above-mentioned problems, and a stamping apparatus capable of printing with a uniform density even when using a stencil printing plate having a rail-shaped protrusion. The purpose is to provide.

[0008]

[Means for Solving the Problems]

 To achieve this object, the stamp device of the present invention comprises a heat-sensitive stencil sheet, a frame body having rail-shaped protrusions, an ink-impregnated member impregnated with ink, and a back-up film. A stencil printing plate is formed with a perforated image, and printing is performed by a marking means provided with a pressing member. As the pressing member, a pressing surface whose deformation amount is 0.2 mm or less is used.

[0009]

[Action]

 In the stamp device of the present invention having the above-mentioned structure, the printing is performed by pressing the printing surface against the non-printed material while the stamping member deforms the frame of the stencil printing plate during printing. At this time, since the pressing member is hardly deformed by the sealing load, the printing surface remains flat regardless of the elastic restoring force of the frame, and uniform pressure is transmitted to the printing surface.

[0010]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIGS. 1A and 1B are schematic sectional views of the stamp device of this embodiment. The stamp device 1 is roughly divided into a handle 2, a pressing member 3 disposed below the handle 2, a stamp cover 4 serving as a guide member of the handle 2 and a pressing member 4 arranged so as to surround the pressing member 3. The stencil printing plate 5 arranged below the member 3 and the plate spring 6 which is a holding member for removably holding the stencil printing plate 5 inside the stamp cover 4 Composed.

The handle 2 includes a spherical surface portion 7 having a spherical lower end, a notch portion 8 formed above the spherical surface portion 7, and a grip portion 9 at the upper end.

As shown in FIG. 3, the stencil printing plate 5 is arranged in a known heat-sensitive stencil sheet 50, a resin frame 51 having rails formed therein, and an opening of the frame 51. The ink impregnating member 52 and the backup film 53 are sequentially laminated. The heat-sensitive stencil sheet 50 and the backup film 53 are adhered to the frame body 51 by the adhesive layer 54 in order to seal the ink impregnation member 52.

As the adhesive layer 54, a double-sided tape having improved ink resistance is suitable. This is because the use of the adhesive prevents the heat-sensitive stencil sheet 50 and the frame body 51 from having different coefficients of thermal expansion and causing wrinkles due to the environmental temperature. This is because when the double-sided tape is used, the adhesive layer 54 acts as a cushioning material, so that wrinkles can be prevented.

The ink impregnation member 52 is obtained by impregnating an NBR porous body of 20 ° in a sponge hardness meter (Asker C type) with an oil-based ink. If the hardness of the ink impregnating member 52 is too hard, the non-printed material will not come into contact with it easily, and if it is too soft, the perforation of the stencil printing plate 5 will be unstable. Therefore, the practical hardness of the ink impregnating member 52 is 5 ° to 40 ° in a sponge hardness meter. Next, as the backup film 53, a PET film having a thickness of 75 μm is suitable. If it is thicker than this, the PET film is too stiff and a larger marking load is required, and if it is thinner than this, the durability of the PET film is lost. The stencil printing plate 5 thus configured is perforated with a heat-sensitive stencil sheet 50 by a plate making apparatus (not shown).

As shown in FIGS. 1A and 1B, the pressing member 3 is composed of a metal pad holder 10 having a C-shaped cross section and a pad 11 adhesively fixed to the lower surface of the pad holder 10. ing. As shown in FIG. 4, a mounting groove 12 and two spring hook portions 13 are integrally formed on the upper surface of the pad holder 10. The notch portion 8 of the handle 2 described above can be engaged with the mounting groove 12 of the pad holder 10, whereby the pressing member 3 is rotatably connected to the handle 2 within a predetermined angular range, and It can move in conjunction with the vertical movement of 2.

The pad 11 is made of a rectangular plate made of metal or resin, and has a size smaller than the opening of the frame 51 and larger than the printing range. Then, corners R of 1.5 mm are attached to the four corners of the pad 11 on the printing surface side. The larger the angle R, the more durable the backup film 53 of the stencil printing plate 5 is. Further, the same effect can be obtained even if the ridgeline R is provided on the ridge line on the printing surface side of the pad 11, but if the ridgeline R is applied to the printing range, a large ridgeline R cannot be practically attached because the image is blurred.

A concentrated load from the handle 2 that acts on the center of the upper surface and a distributed load from the stamp surface that acts on the entire lower surface act on the pressing member 3. Therefore, the pressing member 3 is in a state in which the peripheral portion is bent with respect to the central portion due to the difference between the concentrated load and the distributed load. Further, since the rail portion for protecting the stamp surface is formed on the frame body 51 of the stencil printing plate 5, the elastic restoring force of the frame body 51 becomes larger in the peripheral portion than in the central portion. Due to the above two effects, the surface of the pressing member 3 is deformed into a shape with a convex center. Since the stamp surface of the stencil printing plate 5 follows the pressing member 3, the stamp surface becomes convex at the center. In order to prevent this, in the present embodiment, the material, shape, etc. of the pressing member 3, that is, the pad holder 10 and the pad 11 are set so that the deformation amount of the entire surface of the pressing member 3 under a predetermined marking load is 0.2 mm or less. Is set. Incidentally, the actual stamping load in this embodiment is 4 kgf, but the predetermined stamping load is set to 10 kgf in consideration of the margin. Originally, if the pressing member 3 is deformed, the print density should be changed, but if the deformation amount is 0.2 mm or less, a printed matter having a uniform density can be practically obtained.

As another means, there is a method in which the stamping surface of the pressing member 3 is dented from the beginning in anticipation of deformation of the pressing member 3. However, since it is premised that the operator manually stamps, the marking is performed. When the load changes, the amount of deformation of the pressing member 3 changes as a result, and a printed matter with uniform density cannot be obtained.

As shown in FIGS. 1 (a) and 1 (b), the stamp cover 4 has a shape surrounding the pressing member 3, that is, a box shape with an open bottom, and the handle 2 is provided at the center thereof. A guide portion 18 is formed so as to be movable up and down. Inside the stamp cover 4, the upper ends of two tension springs 19 whose lower ends are attached to the spring hooking portions 13 of the pad holder 10 are attached in order to pull the pressing member 3 upward, and the outer periphery of the guide portion 18 is provided. A compression spring 20 for pushing the handle 2 upward is attached between the upper surface of the stamp cover 4 and the grip portion 9. The open bottom of the stamp cover 4 guides the stencil printing plate 5 so that it can move up and down.

Further, leaf springs 6 which are means for holding the stencil printing plate 5 are arranged on both left and right sides inside the stamp cover 4. The leaf spring 6 is U-shaped, one end is fixed to the stamp cover 4, and the claw portion formed at the other end is in a groove provided in the rail portion on the upper surface of the stencil printing plate 5. It is designed to engage. The leaf spring 6 has a claw portion which is bent outward by a release means (not shown) to be disengaged from the groove portion of the stencil printing plate 5, so that the stencil printing plate 5 can be removed. When the operator inserts the master plate 5 for stencil printing into the stamp cover 4, the claws at the tips of the leaf springs 6 are guided to the upper rails of the master plate 5 for stencil printing. It is attached to the outside by engaging with the flexure groove. Further, the leaf spring 6 has a shape that bends up and down so as to follow the up and down movement of the stencil printing plate 5.

Next, the operation will be described. In FIGS. 1A and 1B, the operator holds the gripping portion 9 of the handle 2 and places the stamp device 1 on the printing paper 21, which is the material to be printed. At this time, since the pressing member 3 is pulled upward by the tension spring 19, the stencil printing plate 5 does not come into contact with the printing paper 21, so that the printing paper 21 is not contaminated. Next, the operator pushes down the handle 2 against the force of the tension spring 19 and the compression spring 20, so that the handle 2 is guided by the guide portion 18 of the stamp cover 4 and moves downward. The pressing member 3 is interlocked with the movement of the handle 2 and moves downward until the stencil printing plate 5 comes into contact with the printing paper 21. As shown in FIGS. 2A and 2B, when the user further depresses the handle 2, the pressing member 3 rotates around the spherical surface portion 7 of the handle 2 following the printing paper 21. That is, the pressing member 3 is automatically aligned according to the inclination of the stamp surface. When the handle 2 is further pressed, the frame 51 of the stencil printing plate 5 is deformed, and the stamp surface comes into contact with the printing paper 21. At this time, since the stamp surface follows the surface of the pressing member 3, it is pressed onto the printing paper 21 as a flat surface, so that it is possible to obtain printing with a uniform density.

As is clear from the above description, in the stamp device of the present embodiment, the pressing member 3 having a deformation amount of the pressing surface of 0.2 mm or less at the time of marking is used. Since the member 3 is hardly deformed by the sealing load, the stamp surface remains flat regardless of the elastic restoring force of the frame 51, and uniform pressure is transmitted to the stamp surface. Therefore, it is possible to print with a uniform density.

The present invention is not limited to the embodiments described in detail above, and modifications can be made without departing from the spirit of the invention.

[0025]

[Effect of device]

 As is apparent from the above description, in the stamp device of the present invention, since the pressing member whose deformation amount on the pressing surface is 0.2 mm or less at the time of stamping is used, the stamping member is about the stamping load. Since it hardly deforms, the stamp surface remains flat regardless of the elastic restoring force of the frame, and uniform pressure is transmitted to the stamp surface. Therefore, even with a stencil printing plate having rail-shaped protrusions, it is possible to print with a uniform density.

[Brief description of drawings]

1A and 1B are schematic cross-sectional views of a stamp device according to this embodiment.

2A and 2B are schematic cross-sectional views for explaining a printing state of the stamp device according to the present embodiment.

FIG. 3 is a schematic cross-sectional view of a stencil printing plate.

FIG. 4 is a perspective view for explaining a mounting state 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 plate 10 Pad holder 11 Pad 50 Heat-sensitive stencil sheet

Claims (1)

[Scope of utility model registration request] 1. A stencil printing plate comprising a heat-sensitive stencil sheet, a frame body on which rail-shaped protrusions are formed, an ink impregnating member impregnated with ink, and a backup film is formed and pressed. A stamp device for performing printing by a stamping device including a member, wherein the pressing member has a deformation amount of a pressing surface of 0.2 mm or less at the time of stamping.