JPH0560861U - Rotor for rotating rubber stamp - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a rotor that does not require a shaft in a rotary rubber stamp, and the print belt does not shift during use, and can be rotated with a small force when rotating. , Rotor for rotating rubber stamps that can rotate reliably without spinning. [Structure] A toothed disc 1 is stretched at one end of a tubular portion 2, and at least three rod-shaped bodies 3 are circumferentially equidistantly centered around an axis on both side surfaces of the tubular portion 2. And at least a concave portion 5 inscribed in each of the rod-shaped bodies 3 and having a diameter smaller than that of the tubular portion 2.
Alternatively, each of the rod-shaped bodies 3 is circumscribed, and a recess 5 smaller than the diameter of the tubular portion 2 is separately provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotating rubber stamp rotor for use in a rotating rubber stamp.

[Prior Art]

 In the conventional rotary rubber stamp (FIG. 12), the rotor 22 is held by the frame 20 with the shaft 21, and the print belt 9 is stretched between the rotor 22 and the frame 20 or the receiving plate 8 to rotate the rotor 22. The print belt 9 was rotated. In these rotary rubber stamps, in order to hold the rotor 22 on the shaft 21, both ends of the shaft 21 are fixed to the frame with screws 23. Further, the shaft 21 is as thin as about 1/10 of the diameter of the rotor 22, and the central hole through which the shaft 21 of the rotor 22 passes is slightly larger than the diameter of the shaft 21. Further, the place where the print belt 9 is applied is in the vicinity of approximately half the half diameter of the rotor 22. Therefore, when the rotor 22 is held by the shaft 21, the rotor 22 has a shake angle θ about the shaft 21 with respect to both end directions of the shaft 21. In this type of rotary rubber stamp, the clear lance S is required to easily rotate the rotor. This is because if the clearance S2 between the diameter of the center hole of the rotor 22 and the diameter of the shaft 21 is made smaller or smaller, the blurring will disappear, but if it is made smaller or smaller, the tightening of the rotor and the shaft will increase, and It becomes difficult to rotate.

Therefore, the clearance S2 is increased. (FIG. 13) When the print belt 9 stretched around the rotor 22 is rotated for that purpose, the rotor 22 and the back surface of the print belt 9 may float due to the blur angle θ2 generated by the clearance S2. As a result, the rotor 22 and the print belt 9 are less entangled, and it is difficult to transmit the rotational force from the rotor to the print belt 9. (FIG. 14) Therefore, the print belt 9 was idle. Extra tension is applied to the print belt 9 in order to improve the idle rotation due to the blur angle θ2. For example, Japanese Utility Model Publication No. 50-1932 and Japanese Utility Model Publication No. 50-17454 are known. In all of these devices, the rotor is held by the shaft 21, and the printing belt is always under tension, and the printing belt is stretched. This is because the deflection angle θ2 of the rotor is reduced and the tension applied to the print belt 9 is increased in order to ensure the engagement of the print belt 9. Further, the tension may be adjusted appropriately, but the adjustment of the tension is delicate. Furthermore, if the tension is further reduced, the deflection angle θ of the rotor 22 is generated as described above, and the print belt 9 is not sufficiently hung up, so that the rotational force cannot be reliably transmitted and cannot be used by spinning.

Next, the shaft diameter is increased in order to improve the idling of the print belt 9 by the blur angle θ. This is a point where the clearance S2 is far from the center of rotation (close to the circumference of the rotor) because the shaft diameter is large, even if the same clearance S2 required for rotation is provided, and the blurring angle θ1 is naturally reduced to print. Improving the idle rotation of the belt 9. However, enlarging the shaft 21 'makes the finished product heavy, costly, and difficult to handle. (FIG. 15) Finally, if a metal print ring is used as in Japanese Utility Model Publication No. 55-21818, a complicated structure is required to rotate each print ring. Further, since the print belt 9 is not stretched, the purpose, structure and effect are different.

[0004]

[Problems to be solved by the device]

 As described above, the problem to be solved by the present invention is that the clearance between the rotor hole and the shaft diameter causes blurring, which makes the print belt hung on the rotor uncertain and rotates the print belt. It requires a great deal of power to do it, and it causes an idle rotation. Also, if a large tension is applied to the print belt, the stretch of the print belt will occur due to consideration of the hang-up of the print belt. Therefore, the present invention provides a rotor that does not require a shaft for holding the rotor, provided in the rotor such that the clearance S2 is far from the center of rotation (a point close to the circumference of the rotor). When used for a rotating rubber stamp, the printing belt can be rotated with a smaller force than before without applying a large amount of tension to the printing belt, and the rotational force can be transmitted to the printing belt. It provides a rotor for a rotating rubber stamp that can be reliably rotated without

[0005]

[Means for solving problems]

 The toothed disc 1 is stretched at one end of the tubular portion 2, and at least three rod-shaped bodies 3 are equidistantly arranged on the circumference of the tubular portion 2 on both sides of the tubular portion 2 at equal intervals on the circumference. A recess 5 that is inscribed in each of the rod-shaped bodies 3 and smaller than the diameter of the cylindrical portion 2 or a recess 5 that is inscribed in each of the rod-shaped bodies 3 and smaller than the diameter of the cylindrical portion 2 is separately provided.

[Action]

 The rod-shaped body 3 of one rotor is inserted into the recessed portion 5 of the adjacent rotor, and a plurality of rotors are sequentially inserted and connected to each other. You can. Regarding the blurring, comparing the diameter D1 of the virtual shaft formed by the rod-shaped body 3 with the diameter D2 of the conventional shaft, D1> D2, and the clearance required for rotation (clearance S1 between the rod-shaped body 3 and the concave portion 5: shaft diameter And S1 = S2) and the clearance S2 of the hole diameter of the rotor is provided, the shake angle θ decreases if the diameter to be supported is large. Therefore, the print belt can be securely hooked on the rotor, can be rotated with a force smaller than the conventional one, and can be reliably rotated without idling.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be specifically described. Embodiment 1 of the present invention is shown in FIGS. 1, 2 and 3. Reference numeral 1 is a toothed disc having a diameter of 30 mm and a thickness of 0.8 mm, and small teeth are uniformly provided on the outer circumference. Reference numeral 2 denotes a cylindrical portion having a diameter of 20 mm and a thickness of 7 mm, which is smaller in diameter than the toothed disc 1 and is provided with the toothed disc 1 at one end thereof. The side surface is provided with a recess 5 having a depth of 1.5 mm and a diameter of 18 mm and a diameter of 13 mm in a donut shape. At the other end, rod-like bodies 3 having a diameter of 1.5 mm and a length of 1.5 mm, which are inscribed in the circle having a diameter of 17.9 mm from the cylindrical portion 2, are provided at three equal intervals. Each of the rod-shaped bodies 3 has dimensions of diameter and length that can be inserted into the recess 5. In Example 1, the length of the rod-shaped body 3 and the depth of the recess 5 are the same, but at least about 1 mm is required, but it may be longer than the length of the tubular portion 2, and the thickness and strength of the rod-shaped body 3 may be increased. , Etc. may be taken into consideration when deciding. Further, the diameter of the concave portion 5 may be at least about 1/3 of the diameter of the tubular portion 2 or more, but it is needless to say that the diameter may be close to the diameter of the tubular portion 2. Incidentally, 6 is a projecting body, which is provided on the outer peripheral surface of the cylindrical portion 2 at equal intervals in the same direction as the axial direction. The height is usually about 1 mm, but it does not necessarily have to be 1 mm. It may be determined in consideration of the sizes of the toothed disc 1 and the cylindrical portion 2. The cross-sectional shape of the protrusion 6 is an isosceles triangle. As the material of the rotor of the first embodiment, synthetic resin such as polypropylene, polyethylene, ABS resin, acrylic resin, polyacetal resin can be used.

FIG. 6 is a partially broken sectional view of a rotary rubber stamp using the rotor of the first embodiment. It is a rotary rubber stamp using five print belts 9 and five rotors. The five rotors are inserted into the recesses 5 of the adjacent rotors of the rod-shaped bodies 3, and the five rotors are connected. Reference numeral 7 denotes a frame, which can be made of the same material as that of the rotor. The frame 7 is divided into two parts on the left and right, and is integrated by a fixing ring 12 and a receiving metal 8. The rod-shaped body 3 of the first rotor is inserted into the circular recess 10 having the same shape as the recess 5 provided on one inner surface of the frame 7, and the other inner surface of the frame 7 is provided with A cylindrical body 11 having the same diameter as the circle inscribed in the rod-shaped body 3 is provided, and is inserted into the recess 5 of the fifth rotor. The money receiver 8 is provided with tabs 13 at both ends and is fitted to the lower end of the frame 7. In the first embodiment, since the rod-shaped bodies 3 and the inward wall surface 5 ′ of the recess 5 are connected to each other by a clearance, the recess 5 may be a circular recess having a diameter of 18 mm. The material of the receiving metal 8 may be any material that can be used normally, such as metal and synthetic resin. Each print belt 9 is stretched around the receiving member 8 and the cylindrical portion 2 of each rotor. 14 is a holder. 16 is a thin sheet.

The rotating rubber stamp using the rotor of this embodiment can be used in the same manner as the conventional rotating rubber stamp, and the toothed disc 1 can be rotated to rotate the print belt. The adjacent rotor does not rotate. There are various possible reasons for this, but the main ones are that the diameter of the rotating shaft of the adjacent rotor can be increased, the blurring of the toothed disc 1 of the rotor can be reduced, and the rod-shaped bodies 3 and When the frictional resistance between the concave portion 5 and the printing belt 9 is smaller than the frictional resistance between the concave portion 5 and the printing belt 9 on the surface of the cylindrical portion 2, printing is performed unless the frictional resistance between the receiving metal 8 and the printing belt 9 is larger. Since the belt does not rotate, tension is applied to the print belt so that it will always be large. This tension is smaller than that of the conventional rotary rubber stamp by the contact resistance between the rotor and the print belt due to the rotation of the rotor.

A second embodiment of the present invention is shown in FIGS. The description of the same size and the same configuration as that of the first embodiment will be omitted. The rod-shaped body 3 was formed into a 2 mm prism, inscribed in a circle having a diameter of 17.9 mm, and four rods were provided at equal intervals. This second embodiment can also be used for a rotary rubber stamp as in the first embodiment. The shape of the rod-shaped body 3 may be a polygonal prism such as a rectangular parallelepiped, a triangular prism, and a rhomboidal prism, and the number provided is preferably 3 to 8.

A third embodiment of the present invention is shown in FIGS. The description of the same size and the same configuration as the first embodiment will be omitted. In this embodiment, three equilateral triangular rod-shaped bodies 3 each having a side length of 1.5 mm and a length of 1.5 mm, which are inscribed in a circle having a diameter of 17.9 mm, are attached to the side surface of the toothed disc 1 at equal intervals. In addition, a concave portion 5 having a diameter of 18 mm is provided on the other end surface of the tubular portion 2.

A fourth embodiment of the present invention is shown in FIGS. 9 and 10. The dimensions are the same as those of the first embodiment, and the description of the overlapping configuration will be omitted. In this embodiment, the contact resistance between adjacent rotors can be further reduced. The end surface 2'of the tubular portion 2 has a radius of 0. Three 3 mm semispherical protrusions 15 were provided at equal intervals. The depth of the recess 5 is the same as the length of the tubular body 3. When this rotor is made into a rubber stamp as shown in FIG. 6, the end face 2 ′ of the tubular portion 2 of each rotor is the same as the end face 2 ″ of the tubular portion 2 of the adjacent rotor by the length of the protrusion 15. That is, the gap is 0.3 mm, and the contact resistance between adjacent rotors is small.

The protrusion 15 can be provided at at least one of the end faces 2 ′ and 2 ″ of the tubular portion 2, the end face 3 ′ of the tubular body 3 or the bottom surface 4 of the recess 5. Since the shape of the protrusion 15 is to reduce the contact area of the adjacent rotors, the point contact of the polygonal pyramid shape such as the triangular pyramid shape or the apex of the triangular cross section is provided at the above position. Line contact or small surface contact, and these may be provided in any shape such as a radial shape, a circular shape, an arc shape, or a linear shape on each of the end faces 2 ′, 2 ″, 3 ′ or the bottom face 4.

A fifth embodiment of the present invention is shown in FIGS. The description of the same size and the same configuration as the first embodiment will be omitted. In this embodiment, three regular triangular rod-shaped bodies 3 each having a side length of 2 mm and a length of 2 mm, which circumscribes a circle having a diameter of 13.2 mm, are stretched on the side surface of the toothed disc 1 at equal intervals to form a cylinder. A circular donut-shaped concave portion 5 having a diameter of 18 mm and a diameter of 13 mm is provided on the other end surface of the portion 2. When the rotor of this embodiment is used for the rotary rubber stamp of FIG. 6, each rotor is connected by the regular triangular rod-shaped body 3 and the outward wall surface 5 ″ of the recess 5.

[0014]

【effect】

 The present invention is configured as described above and has the following effects. The toothed disc 1 is stretched at one end of the tubular portion 2, and at least three rod-shaped bodies 3 are equidistantly arranged on the circumference of the tubular portion 2 on both sides of the tubular portion 2 at equal intervals on the circumference. , A rotary rubber stamp which is inscribed in each of the rod-shaped bodies 3 and has a recess 5 smaller than the diameter of the cylindrical portion 2 or circumscribed in each of the rod-shaped bodies 3 and separately provided with a recess 5 smaller than the diameter of the cylindrical portion 2. Since it is a rotor, (1) it can be a new rotary rubber stamp that does not use the shaft that is always used in the conventional rotary rubber stamp. (2) Since the diameter of the rotary shaft of each rotor can be increased, the shake of the rotor can be reduced, so that the print belt is not subjected to excessive tension and the rotational force is reliably transmitted to the print belt. Since the print belt can be prevented from idling, the print belt will not be broken. Further, by providing the protrusion 15 on any of the end faces 2 ', 2 ", 3'or the bottom face 4, the contact resistance of each rotor can be made smaller, so that the rotational force can be more reliably applied to the print belt. Can be transmitted.

[0015]

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of the first embodiment of the present invention.

FIG. 3 is an enlarged view of part E of FIG.

FIG. 4 is a perspective view of a second embodiment of the present invention.

FIG. 5 is a sectional view taken along line BB of the second embodiment of the present invention.

FIG. 6 is a partially broken sectional view of a rotary rubber stamp using the first embodiment of the present invention.

FIG. 7 is a perspective view of a third embodiment of the present invention.

FIG. 8 is a sectional view taken along line CC of the third embodiment of the present invention.

FIG. 9 is a perspective view of a fourth embodiment of the present invention.

FIG. 10 is a perspective view of a fifth embodiment of the present invention.

FIG. 11 is a sectional view taken along line DD of Example 5 of the present invention.

FIG. 12 is a partially broken sectional view of a conventional rotary rubber stamp.

FIG. 13 is a partially broken sectional view of a conventional rotor and shaft.

FIG. 14 is a partial cross-sectional view of a conventional rotor, print belt, and shaft.

FIG. 15 is a partially broken sectional view of a conventional rotor using a large diameter shaft.

[Explanation of symbols]

 1 Toothed disc 2 Tube part 3 Rod-like body 5 Recessed part

Claims (2)

[Scope of utility model registration request] 1. A toothed disc 1 is stretched at one end of a tubular portion 2,
Further, at least three rod-shaped bodies 3 on the circumference of the cylinder 2 at equal intervals on the side surface of both ends of the cylindrical portion 2, and at least
A recess 5 that is inscribed in each of the rod-shaped bodies 3 and smaller than the diameter of the cylindrical portion 2 or a recess 5 that is inscribed in each of the rod-shaped bodies 3 and smaller than the diameter of the cylindrical portion 2 is separately provided. Rotating rubber stamp rotor. 2. At least both side surfaces 2'of the tubular portion 2,
2. The rotor for a rotary rubber stamp according to claim 1, wherein a protrusion 15 is provided on either 2 "or the end surface 3'of the rod-shaped body 3 or the bottom surface 4 of the recess 5.