JP6634913B2 - Inverted seal - Google Patents

Description

  The present invention relates to a reversible stamp in which a stamp can be performed by reversing a printing body.

  Conventionally, there has been known an inversion-type stamp in which ink is supplied by bringing an ink pad into contact with a stamp surface of a printing body, and the stamp surface is turned downward while pressing a grip so that the stamp can be performed (for example, an inversion stamp). And Patent Document 1). In particular, when a quick-drying ink is used in this type of stamp, it is necessary to increase the airtightness of the ink pad to prevent volatilization and drying of the ink. For example, Patent Literature 2 suggests that when a stamp is not used, pressing the side wall of the print body around the ink pad prevents early drying of the ink.

JP 2011-25659 A JP-A-49-37727

  However, when a quick-drying ink is used, it is necessary to ensure the air-tightness of the ink pad even if there are variations or errors in the dimensions of the molded product or the printed body. For this reason, if a highly resilient spring is used and the stamped surface having irregularities is kept in contact with the ink pad for a long time, settling of the ink pad may occur. In such a case, if the transfer position is slightly shifted, the ink of the pad in the loose portion does not adhere to the print body, and as a result, there is a possibility that the amount of ink adhered to the stamp surface portion may be uneven, and quality deterioration such as imprint unevenness may occur. . In addition, the transfer load may be increased more than necessary due to dimensional change (variation) of the molded product such as the stamp surface, and therefore, the amount of ink adhered to the stamp surface may increase, and quality deterioration such as blurring of the stamp may occur. is there.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and ensures airtightness of an ink pad even when a dimensional variation occurs in a molded product (a stamped portion or the like) or a printed body, and the contact of the stamped surface is maintained. It is an object of the present invention to provide a reversible stamp in which the transfer load can be prevented from becoming excessive due to the settling of the ink pad due to the above, or the dimensional change of a molded product or the like.

  In order to solve the above-described problems, the present invention provides an inner cylinder body that supports a printed body with a seal surface facing an ink pad, and the inner cylinder body is slidable via an elastic body that pivotally supports the printed body. And an outer cylinder body that is housed in the inner cylinder body. By pressing the outer cylinder body against the repulsive force of the elastic body, the printing body can be inverted in the inner cylinder body to perform the marking. A stamp that accommodates the ink pad in a movable container that is slidable in the inner cylinder, and elastically supports the movable container by a biasing unit that applies an elastic force to a side of the printed body that opposes the stamp surface. This is a reversible stamp which is characterized in that it is performed.

  In the above configuration, the reversal stamp is such that the ink pad is accommodated in an accommodation space above the inner cylinder, and the accommodation space is closed by the printing body due to a repulsive force of the elastic body. It is preferable that a packing member is provided for making the inside of the storage space closed by the printing body airtight.

  Further, in the reversal stamp, it is preferable that the packing member is an O-ring surrounding the outer peripheral portion of the printing body.

  In the reversing stamp, it is preferable that the elasticity of the urging means is set smaller than that of the ink pad.

  Further, it is preferable that the reversing stamp is a coil spring in which the urging means is provided on a back surface of the movable container.

  According to the inversion type stamp according to the present invention, the ink container is accommodated in the movable container, and the movable container is elastically supported by the urging means. Due to the elastic support of the movable container, the contact between the ink pad and the stamp surface is buffered, preventing the transfer load from becoming unnecessarily large due to settling of the ink pad and dimensional change of the molded product (the stamp surface). Is done. Thereby, imprint spots and imprint bleeding can be prevented.

It is the front view and side view of the reversal type stamp by one embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II of the inverted stamp shown in FIG. FIG. 3 is a cross-sectional view of the reversing stamp shown in FIG. FIG. 3 is a diagram for explaining a support structure of a printing body. FIG. 3 is a diagram for explaining the structures of a printing body and an ink cartridge. It is a flowchart for demonstrating operation | movement of an inversion type stamp.

  Hereinafter, the configuration of the reversible stamp 10 according to a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1A is a front view of the reversible stamp 10, and FIG. 1B is a side view of the reversible stamp 10. FIG. 2 is a sectional view taken along the line II-II shown in FIG. 1A, and FIG. 3 is a sectional view taken along the line III-III shown in FIG.

The reversing stamp 10 includes an inner cylinder 20 that rotatably supports a main body 40 of a printed body, for example, a rubber body, and an outer cylinder 30 that accommodates the inner cylinder 20 slidably up and down. ing.
The outer cylinder 30 is a container that stores the ink cartridge 50 and the main body 40 described later, and is a member that also functions as a handle when the reversible seal 10 is stamped. The outer cylinder 30 has a bottom and a hollow, substantially cylindrical shape. For example, in order to facilitate replacement of the ink cartridge 50, the outer cylinder 30 is detachable from the cylinder 31. It is preferable that the cap portion 32 be composed of two members. At this time, the cap portion 32 can be detachably attached by an appropriate means such as a fitting lock mechanism so as to cover the upper portion of the cylindrical portion 31.

  For example, a protrusion 31a for preventing the cylindrical stamp 10 from rolling may be formed on, for example, a rear side of an outer wall of the cylindrical portion 31. In addition, the protrusion 31a can be used as a mark indicating the direction of the seal 10 at the time of stamping. In the present embodiment, the projection 31a is formed so as to be at a lower position with respect to the imprint after the transfer to the paper surface. That is, by always stamping the projection 31a of the seal 10 toward the user, the up and down direction of the seal can be correctly adjusted.

  Further, a window hole 31b for confirming whether or not the ink cartridge 50 is correctly inserted at a predetermined position in the back may be provided in a part of the cylindrical portion 31 of the outer cylindrical body 30.

  The inner cylindrical body 20 is formed of a substantially cylindrical hollow member having an opening 21 on the side (front side) where the printing surface of the printing body 41 rotates (front side). The outer diameter of the inner cylinder 20 corresponds to the inner diameter of the outer cylinder 30 described above, and the upper part of the inner cylinder 20 is slidably inserted from the lower opening of the outer cylinder 30.

  On both left and right sides of the inner cylindrical body 20, long slit holes 20a, 20a are formed along the vertical direction which is the sliding direction. The horizontal shafts 42, 42 of the main body 40, which are rotatably supported by the inner wall of the outer cylindrical body 30, are inserted through the slit holes 20a, 20a. That is, as shown in FIG. 4, in the inner cylinder 20, the main body 40 moves up and down in conjunction with the pressing operation of the outer cylinder 30 (however, the stroke range is limited by the length of the slit hole 20a), and The rotation of the main body 40 around the horizontal axis 42 passing through the slit hole 20a is allowed.

  The outer cylinder 30 slidably accommodates the inner cylinder 20 via a compressed coil spring 60 that is an elastic body. That is, the inner cylindrical body 20 is constantly urged by the elastic repulsive force of the coil spring 60 in a direction to protrude from the outer cylindrical body 30, but the packing (O-ring 43) comes into contact with the inner wall at the end of the outer frame case 51. Thus, further protrusion of the inner cylindrical body 20 is restricted. Thus, the outer cylinder 30 and the inner cylinder 20 are prevented from being separated from each other.

  A reversing guide 22 for reversing the body 40 of the printed body is formed on the inner wall of the inner cylindrical body 20 along the slit hole 20a. The reversing guide 22 of the present embodiment is formed to have a substantially semicircular middle groove 22b between two cylindrical small projections 22a and 22c. However, the reversing guide is not limited to the mode described here as long as it is a gear body or a cam mechanism that meshes so as to reverse the main body 40 with the vertical movement of the main body 40 of the printed body.

  An ink cartridge 50 for supplying ink to the printing body 41 is inserted into the upper part of the inner cylinder 20. In the ink cartridge 50, a movable container 53 containing an ink pad 52 is slidable up and down within the accommodation space of the outer frame case 51. The sliding direction of the movable container 53 in the outer frame case 51 and the sliding direction of the inner cylinder 20 in the outer cylinder 30 match.

  The movable container 53 that accommodates the ink pad 52 is elastically supported by a coil spring 54 that is a biasing means provided in the outer frame case 51. The coil spring 54 constantly applies an elastic force to the rear surface (upper surface) of the movable container 53 in a compressed state. When a relatively hard ink pad 52 is employed, it is preferable that the elastic modulus (spring constant) of the coil spring 54 be set smaller than that of the ink pad 52.

  The ink impregnated in the ink pad 52 can be appropriately used regardless of a pigment type, a dye type, an oil type or an aqueous type. For example, as a quick-drying ink for imprinting hard-to-absorbent paper or non-absorbent material such as coated paper, plastic film, aluminum, and iron, an oil-based ink obtained by dissolving and mixing a colorant or resin in a quick-drying solvent may be used. it can.

In the present embodiment, polyolefin fibers made of polyethylene (PE) and polypropylene (PP) are used as the material of the ink pad 52. In addition, the ink pad 52 has a two-layer structure having a different basis weight (fiber density) because the continuous printing property is better than that of a single layer. The two fiber layers can be bonded by, for example, a heat fusion process. For example, with respect to basis weight 0.23 g / cm ³ of the surface layer (TOP) side in contact with the stamp face, the basis weight of the substrate (BASE) side can be 0.15 g / cm ^3.
In this way, by increasing the fiber density on the TOP side than on the BASE side, it is possible to create a flow of ink from the BASE to the TOP due to a difference in capillary force. Thereby, the transfer time of the ink to the printing body 41 can be stably shortened, and the continuous printing property can be improved.

  When the seal 10 is not used, the outer cylinder 30 is at the upper position where it is not pressed, and the upper surface of the print body 41 is in contact with the lower surface of the ink pad 52 as shown in FIG. As described above, the main body 40 of the printed body in which the horizontal shaft 42 is supported on the inner wall of the outer cylindrical body 30 is in a state where the printed body 41 is pressed against the ink pad 52 by the repulsive force of the coil spring 60. In the related art, if a printed body having irregularities on a stamp surface is kept in contact with an ink pad for a long time, there is a concern that the ink pad may be plastically deformed or set. However, in the present embodiment, a structure in which the movable container 53 containing the ink pad 52 is elastically supported via the coil spring 54 having a smaller elastic modulus than the ink pad 52 is employed, so that the printing body 41 is The force pressing the 52 is buffered by the coil spring 54. Therefore, the force due to the contact of the printing body 41 is reduced, and it is possible to prevent the ink pad 52 from being set.

  In addition, the ink cartridge 50 of the present embodiment has a structure in which the outer frame case 51 that accommodates the ink pad 52 is closed by the main body 40 of the printing body urged by the coil spring 60. Therefore, airtightness of the accommodation space of the ink pad 52 when the stamp 10 is not used or stored is ensured. Further, in this embodiment, an O-ring 43 is provided on the main body 40 of the printing body so as to surround the outer periphery thereof. Since the main body 40 is pressed against the end of the outer frame case 51 via the packing such as the O-ring 43, the airtightness of the accommodation space of the ink pad 52 is further improved, and the volatilization and drying of the ink can be effectively prevented. it can.

The operation of the inverted stamp 10 having the above configuration will be described with reference to FIG.
When the outer cylinder 30 of the seal 10 is not pressed and is not used, the outer cylinder 30 and the inner cylinder 20 are in the extended state where they are farthest from each other. At this time, the printing surface of the printing body 41 comes into contact with the ink pad 52, and the ink is transferred.

  The reversing stamp 10 is stamped by bringing the lower end of the inner cylindrical body 20 into contact with the paper surface P. When the stamp 10 is placed upright on the paper surface P and the grip-shaped outer cylinder 30 is pressed down against the repulsive force of the coil spring 60, the whole is contracted so that the inner cylinder 20 enters the outer cylinder 30. At this time, the main body 40 of the printing body pivotally supported by the inner wall of the outer cylinder 30 also moves downward in the inner cylinder 20 with the horizontal shaft 42 being guided by the slit hole 20a of the inner cylinder 20. .

  When the main body 40 of the printing body 41 descends in conjunction with the pressing operation of the outer cylindrical body 30, first, the first semicircular groove 40 a formed at the lower rear end of the main body 40 is formed in the upper small projection 22 a of the inner cylindrical body 20. (FIG. 6 (I)). At this time, as the main body 40 descends, the rear side of the main body 40 is pushed up by the upper small projections 22a, and the main body 40 starts rotating around the horizontal shaft 42 (FIG. 6 (II)). When the rotation angle of the main body 40 becomes 90 °, the semicircular projection 40b at the center engages with the reversing guide 22 so as to enter the middle groove 22b (FIG. 6 (III)). When the rotation of the main body 40 further proceeds, the lower small projection 22c pushes up the semicircular projection 40b. As a result, finally, the main body 40 is turned 180 ° at the lower end position of the inner cylindrical body 20, and the stamp surface (printing body 41) faces downward (FIG. 6 (IV)). When a pressing force is applied to the outer cylindrical body 30 from above in a state where the printing body 41 and the paper surface P are in contact with each other, the ink of the printing body 41 is transferred to the paper surface P and stamping is performed.

  When the pressing of the outer cylinder 30 is released after the completion of the stamping, the inner cylinder 20 returns to the initial position due to the repulsive force of the compressed coil spring 60. In conjunction with this, the main body 40 of the printed body also moves in the inner cylindrical body 20 and returns to the initial position. However, the stamp face is reversed upward by an operation reverse to the engagement operation with the reversing guide 22 described above.

  In addition, as shown in FIG. 5, in particular, the inverted stamp 10 is such that the main body 40 of the printing body supported on the inner wall of the outer cylinder 30 is pressed against the ink pad 52 side by the repulsive force of the coil spring 60 so as to be in close contact therewith. It is in a state of having done. In the present embodiment, since the ink pad 52 is elastically supported by the cartridge 50 via the coil spring 54 having a spring constant smaller than that of the ink pad 52, the force with which the printing body 41 directly presses the ink pad 52 is reduced. Thus, even when a relatively hard ink pad 52 having a large fiber density in the surface layer is employed, it is possible to prevent the ink pad 52 from being set. In addition, since the ink pad 52 is elastically supported by the coil spring 54, the transfer load of the ink to the printing body 41 does not become unnecessarily large, and can be appropriately adjusted. As described above, by maintaining the flatness of the ink pad 52 and adjusting the transfer load due to the dimensional change of the molded product (the stamped surface portion or the like), it is possible to prevent bleeding or contamination of the imprint.

  In addition, the reversible stamp 10 of the present embodiment closes the space for accommodating the ink pad with the printing body 41 and also uses the packing (for example, a sealing member such as the O-ring 43) disposed around the printing body 41 to form the ink. It has a structure in which the main body 40 is pressed against the end of the outer frame case 51 of the cartridge 50. Thereby, airtightness in the space accommodating the ink pad 52 is secured when the stamp 10 is not used, and even when quick-drying ink is used, volatilization and drying of the ink can be effectively prevented.

DESCRIPTION OF SYMBOLS 10 Reversal type stamp 20 Inner cylinder 22 Inversion guide 30 Outer cylinder 31 Cylindrical part 32 Cap part 40 Main body 41 Printing body 42 Horizontal axis 43 O-ring 50 Ink cartridge 51 Outer frame case 52 Ink pad 53 Movable container 54 Coil spring (Means for transfer)
60 coil spring (elastic body; for stamping)

Claims (5)

An inner cylinder body for supporting the printed body with the stamp surface facing the ink pad; and an outer cylinder body for pivotally supporting the printed body and slidably receiving the inner cylinder body via an elastic body. A reversible stamp in which the printing body is reversed inside the inner cylinder by pressing the outer cylinder against the repulsive force of the body so that a seal can be performed,
The ink pad is housed in a movable container slidable in the inner cylinder, and the movable container is elastically supported by an urging means for applying an elastic force to a side of the printed body opposite to a stamp surface. Inverted seal, characterized by the following.   The ink pad is accommodated in an accommodation space above the inner cylinder, and the accommodation space is closed by the print body by a repulsive force of the elastic body, and the ink body is closed by the print body. The reversible stamp according to claim 1, further comprising a packing member for sealing the inside of the accommodation space.   The reversible stamp according to claim 2, wherein the packing member is an O-ring surrounding an outer peripheral portion of the printing body.   The reversible stamp according to any one of claims 1 to 3, wherein the elasticity of the urging means is set to be smaller than that of the ink pad. The reversible stamp according to any one of claims 1 to 4, wherein the urging means is a coil spring provided on a back surface of the movable container.

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