Stamp pad and transfer tool set for pad printing

Abstract

To provide a stamp pad for pad printing capable of simply and efficiently performing marking even with respect to a fastening member not constant in size or shape, and a transfer tool set.SOLUTION: A stamp pad for pad printing is equipped with a base 10 housing an ink pad 11 impregnated with ink and the cover 20 covering the ink pad 11 and a hole 23 exposing a part of the ink pad 11 is provided to the cover 20. The transfer tool set comprises a stamp pad for pad printing, and a transfer tool in which a mounting part to a finger is attached to a transfer seal formed of a flexible material.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a stamp pad and transfer tool set for pad printing that can print on curved surfaces, uneven surfaces, etc., and in particular to a stamp pad and transfer tool set for pad printing that is suitable for marking fastening members such as bolts and nuts. [Background technology]

[0002] When fastening steel materials that make up large structures using fastening members such as bolts and nuts, the initial tightening is first performed with a specified torque, after which a linear marking is made in the axial direction of the fastening member, and then the final tightening is performed. For example, the marking is made so that it straddles the bolt and nut. If the marking positions on the bolt and nut are misaligned by a specified angle after the final tightening, it can be confirmed that the final tightening was performed correctly. However, if the marking positions on the bolt and nut are not misaligned, it can be discovered that the fastening members have rotated together and the final tightening was not performed correctly, and the fastening can be performed again.

[0003] Conventionally, marking on such fastening members has been done manually with a pen, but in recent years, to reduce the burden on workers, marking devices have been developed, such as those shown in Patent Documents 1 and 2. These marking devices are used by placing the main body over the fastening members.

[0004] The marking device in Patent Document 1 is structured so that two marking rollers attached to the main body are moved in the axial direction of the bolt to perform marking.The marking device in Patent Document 2 is structured so that a marking member with a printing surface that matches the outer shape of the fastener is pivotally attached to the main body, and this marking member is swung in the axial direction of the bolt to perform marking.

[0005] However, these marking devices are custom-made to fit the size and shape of the fastening members. While they are convenient for fastening inspection of large structures that use a large number of fastening members of the same size, they are difficult to use for fastening inspection of structures where the fastening members do not have a consistent size or shape, and there are also cost issues.

[0006] One possible solution to these problems is pad printing. Pad printing has long been used as a method for producing clear prints even on curved or uneven surfaces. Figure 11 is a process diagram that schematically illustrates the principles of pad printing. First, an intaglio plate 1 is created as shown in Figure 11 (A). Ink is poured onto its surface, and excess ink is removed with a blade 2 as shown in (B), leaving ink only in the recesses. Next, a flexible ink pad 3 made of silicone rubber or similar material is pressed against the intaglio plate 1 as shown in (C). The ink is transferred to the surface of the ink pad 3 as shown in (D). This is then pressed against the surface of the printing substrate 4 as shown in (E), and printing is performed as shown in (F).

[0007] This pad printing method has the advantage that it can mark the uneven surfaces of fastening parts because it uses a flexible and deformable ink pad 3. However, as mentioned above, it requires many work steps, such as pouring ink into the recesses of the intaglio plate 1, removing excess ink with the blade 2, and then transferring the ink to the ink pad 3 to print. This has created the problem that it is difficult to apply to marking a large number of fastening parts. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Publication No. 2013-202754 [Patent Document 2] Patent No. 5953877 Summary of the Invention [Problem to be solved by the invention]

[0009] The object of the present invention is to solve the above-mentioned conventional problems and to provide a stamp pad and transfer tool set for pad printing that can easily and efficiently mark fastening members of various sizes and shapes. [Means for solving the problem]

[0010] The stamp pad for pad printing of the present invention, which has been made to solve the above problems, is characterized by comprising a base that houses an ink pad impregnated with ink, and a cover that covers the ink pad, with a hole in the cover that exposes a portion of the ink pad.

[0011] Preferably, the cover is fitted to the base so that the mounting angle can be freely changed. It is also preferable to have an angle restriction mechanism that restricts the mounting angle of the cover to the base at predetermined angles. It is also preferable to provide the base with a portion for being worn by a finger.

[0012] Furthermore, the transfer tool set of the present invention, which was created to solve the above-mentioned problems, consists of a stamp pad for pad printing equipped with the above-mentioned finger attachment portion, and a transfer tool in which the finger attachment portion is attached to a transfer stamp formed of a flexible material. [Effects of the Invention]

[0013] The stamp pad for pad printing of the present invention is always filled with ink, eliminating the need for operations such as pouring ink or removing excess ink with a blade for each operation, allowing for efficient marking. In addition, the orientation of the marker can be freely changed by changing the mounting angle of the cover relative to the base.

[0014] The transfer tool set of the present invention is a stamp pad and a transfer tool made of flexible material, each equipped with a finger attachment part. This allows the worker to simply and easily press the transfer tool against the hole in the stamp pad to transfer ink to the surface of the transfer tool in the shape of the hole, and then press the transfer tool against a fastening member to mark it, all using just their fingers, thereby improving workability. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 2 is a perspective view of the appearance of the stamp pad according to the embodiment. [Figure 2] FIG. 2 is a front view of the stamp pad according to the embodiment. [Figure 3] FIG. 2 is a top view of the stamp pad of the embodiment. [Figure 4] FIG. 2 is a central vertical cross-sectional view of the stamp pad of the embodiment. [Figure 5] FIG. 2 is an external perspective view of the base with the cover removed. [Figure 6] FIG. 2 is a perspective view of the appearance of the cover in a state where it is turned upside down. [Figure 7] FIG. 1 is a perspective view of the appearance of a transfer tool according to an embodiment. [Figure 8] FIG. 2 is a cross-sectional view of the transfer tool of the embodiment. [Figure 9] FIG. 10 is an explanatory diagram showing the stamp pad and transfer tool attached to a finger. [Figure 10] FIG. 10 is an explanatory diagram of a state in which a fastening member is marked. [Figure 11] FIG. 1 is a process explanatory diagram schematically illustrating the principle of pad printing. DETAILED DESCRIPTION OF THE INVENTION

[0016] Preferred embodiments of the present invention will now be described in detail. Fig. 1 is a perspective view of the stamp pad of the embodiment, Fig. 2 is a front view, Fig. 3 is a top view, and Fig. 4 is a central longitudinal cross-sectional view. As shown in Fig. 4, this stamp pad consists of a base 10, a cover 20, and a part 30 that is attached to a finger.

[0017] In this embodiment, the base 10 is in the shape of a circular dish, and a circular ink pad 11 impregnated with ink is fixed to the upper surface of the center of the base. The ink pad 11 is made of porous rubber, and the interior of the ink pad is impregnated with marking ink. In this embodiment, the ink pad 11 is circular, approximately 20 mm in diameter and 4 mm in height, although these sizes and shapes can be changed as appropriate. The ink color is preferably white or yellow, which is easily noticeable.

[0018] The height of the peripheral wall 12 of the base 10 is approximately the same as the height of the ink pad 11. A cover 20 that covers the ink pad 11 is attached to the upper surface of the base 10. The cover 20 has a circular upper surface 21 and a circular wall 22 that hangs down from the periphery, and is removably fitted to the upper surface of the base 10.

[0019] 1, a hole 23 is provided in the upper surface 21 of the cover 20 to expose a portion of the ink pad 11. In this embodiment, the hole 23 is linear. The upper surface of the ink pad 11 is in close contact with the lower surface of the cover 20 due to its own elasticity, and only the surface corresponding to the hole 23 is exposed.

[0020] FIG. 5 is an external perspective view of the base 10 with the cover 20 removed. The ink pad 11 is omitted. As shown in FIG. 5, gear-shaped projections 13 are formed at a constant pitch on the lower half of the peripheral wall 12 of the base 10. Meanwhile, as shown in FIG. 6, an inward protrusion 24 is formed between two opposing horizontal grooves on the circular wall 22 of the cover 20. Because the peripheral wall 12 of the base 10 and the circular wall 22 of the cover 20 are both circular, the mounting angle of the cover 20 relative to the base 10 is freely adjustable. However, because the gear-shaped projections 13 formed on the peripheral wall 12 of the base 10 mesh with the protrusions 24 formed on the circular wall 22 of the cover 20, the mounting angle of the cover 20 is restricted to a predetermined angle. In other words, the projections 13 and the protrusions 24 form an angle restriction mechanism. The specific structure of the angle restriction mechanism is not limited to this and can be modified as appropriate.

[0021] As shown in FIG. 1, the base 10 is provided with a finger attachment portion 30. In this embodiment, both the base 10 and the finger attachment portion 30 are made of resin and are molded as a single unit. The finger attachment portion 30 consists of a circular tubular portion 31 that can accommodate an adult's index finger, and a bifurcated leg portion 32 connected to the bottom of the circular tubular portion 31. By moving the middle finger along the curved surface of the leg portion 32, the stamp pad can be freely rotated around the index finger as the axis, which has the effect of allowing the stamp pad to be adjusted to a position that is easy to mark. The leg portion 32 is also convenient for holding the stamp pad upright as shown in FIG. 1.

[0022] The stamp pad described above is used as a transfer tool set in combination with the transfer stamp 40 shown in Figures 7 and 8. The transfer stamp 40 is a circular base 41 to which a transfer pad 42 made of a flexible material is attached, and like the stamp pad, a finger attachment part 50 is integrally provided. This attachment part 50 is preferably sized so that it can fit on an adult's thumb.

[0023] Silicone rubber is preferably used as the flexible material that makes up this transfer pad 42. In addition to using silicone rubber entirely, it is also possible to increase flexibility by incorporating silicone oil or soft urethane inside. Transfer pad 42 made of such a flexible material can deform to fit the uneven surface shape of bolts and nuts.

[0024] Next, we will explain how to mark a fastening member using the transfer tool set of the present invention. First, adjust the mounting angle of the cover 20 relative to the base 10, and then press the transfer pad 42 of the transfer mark 40 against the surface of the stamp pad. As mentioned above, the cover 20 has a linear hole 21 formed therein, which exposes a portion of the ink pad 11. Therefore, the transfer pad 42, made of a flexible material, comes into contact with the ink pad 11 located below the cover 20 through the hole 21. As a result, a linear ink mark is transferred onto the surface of the transfer pad 42.

[0025] Next, the transfer pad 42 of the transfer stamp 40 is pressed against the surface of the fastening member, as shown in Figure 10. In the example of Figure 10, a bolt 61 is inserted upward from the underside of a base member 60, and a nut 62 is fastened to the bolt 61 to fasten and fix the fastened member 63. The transfer pad 42 is pressed against the corner between the shank of the bolt 61 and the surface of the nut 62, and the linear ink on the surface of the transfer pad 42 adheres to the shank of the bolt 61 and the nut 62, thereby forming a mark. This series of operations can be performed with the stamp pad and transfer stamp 40 worn on the fingers of the worker's hand, as shown in Figure 9, so marking can be done easily and efficiently even when the size and shape of the fastening member are not uniform.

[0026] Furthermore, if it is necessary to change the direction of marking on the fastening member, the direction of the linear ink transferred to the surface of the transfer pad 42 can be easily changed by changing the attachment direction of the cover 20 relative to the base 10 of the stamp pad.

[0027] As explained above, the present invention is suitable for marking fastening members, but it goes without saying that the present invention can also be applied to marking other than fastening members. [Explanation of symbols]

[0028] 10 Foundations 11 Ink Pad 12. Perimeter wall of the base 13 Unevenness 20 Cover 21 Top side 22 Circular Wall 23 holes 24 protrusions 30 Finger attachment part 31 Circular cylindrical section 32 Legs 40 Transfer stamp 41 Foundation 42 Transfer Pad 50 Finger attachment part 60 Base material 61 volts 62 Nut 63. Contracted materials

Claims

1. A stamp pad for pad printing, comprising a base containing an ink pad impregnated with ink, and a cover covering the ink pad, the cover having a hole for exposing a portion of the ink pad.

2. 2. The stamp pad for pad printing according to claim 1, wherein said cover is fitted to said base so that an attachment angle thereof can be freely changed.

3. 3. The stamp pad for pad printing according to claim 2, further comprising an angle restriction mechanism for restricting the mounting angle of said cover relative to said base at predetermined angles.

4. 4. The stamp pad for pad printing according to claim 1, wherein the base is provided with a portion for attachment to a finger.

5. 5. A transfer tool set comprising the stamp pad for pad printing according to claim 4 and a transfer tool having a transfer mark made of a flexible material and a finger attachment part attached thereto.

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