JPH0560865U - 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 a circular convex body 3 and a polygonal concave portion 5 are separately provided on both side surfaces of the tubular portion 2.

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. 10), the frame 20 holds the rotor 22 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. 11) 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. 12) 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. 13) Finally, if a metallic 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]

 A toothed disc 1 is stretched at one end of the tubular portion 2, and a circular convex body 3 and a polygonal concave portion 5 are separately provided on both side surfaces of the tubular portion 2.

[0006]

[Action]

 The circular convex body 3 of one rotor is inserted into the concave portion 5 of the adjacent rotor, and a plurality of rotors are sequentially inserted and connected. No rotor is required, and each rotor is independent and reliable. It can rotate. Regarding the blur, comparing the diameter D1 of the virtual shaft created by the circular convex portion 3 with the straight diameter D2 of the conventional shaft, D1> D2, and the clearance required for rotation (the clearance between the circular convex portion 3 and the concave portion 5) is obtained. S1: A clearance S2 between the shaft diameter and the hole diameter of the rotor, where S1 = S2) is provided, the larger the supported diameter, the smaller the blur angle θ. 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.

[0007]

【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. A cylindrical portion 2 has a circular shape with a diameter of 20 mm and a thickness of 7 mm, and the toothed disc 1 is provided at one end thereof. The diameter of the side surface of the other end of the cylindrical portion 2 is 11. A circular convex body 3 having a length of 6 mm and a length of 1 mm is provided. Further, on the side surface of the end portion of the cylindrical portion 2 on the toothed disc 1 side, a concave body is provided in a square concave shape having a side of 12 mm and a depth of 1 mm. Therefore, even if the circular convex body 3 is inserted into the concave portion 5, each rotor is held by the outer peripheral surface of the circular convex body 3 and the outer wall 5'of the concave portion 5, and each rotor is independent and surely. Rotate. Even if the end surface of the circular convex body 3 is curved, it does not hinder the operation and effect of the present invention. In Example 1, the length of the circular convex body 3 and the depth of the concave portion 5 are the same, but at least about 1 mm is required, and the size and strength of the circular convex body 3 may be taken into consideration and appropriately determined. Good. Further, the diameter of the circular convex body 3 is preferably at least about ⅓ of the diameter of the tubular portion 2, but it goes without saying that it is even better if it is close to the diameter of the tubular portion 2.

Reference numeral 6 denotes a protrusion, which is provided on the outer peripheral surface of the cylindrical portion 2 at equal intervals. The height is usually about 1 mm, but not necessarily 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. 4 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 concave portions 5 of the adjacent rotors, 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 circular convex body 3 of the first rotor is inserted into the concave portion 10 having the same shape as the concave portion 5 provided on one inner side surface of the frame 7, and the other inner side surface of the frame 7 is further formed on the other inner side surface. A convex portion 11 having the same shape as the circular convex body 3 is provided and is inserted into the concave portion 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. As the material of the receiving metal 8, any material such as metal or synthetic resin that can be usually used may be used. Each of the print belts 9 is stretched around the receiving member 8 and the cylindrical portion 2 of each rotor. 14 is a holder. Reference numeral 16 is a thin sheet.

The rotary rubber stamp of this embodiment can be used in the same manner as a conventional rotary rubber stamp, and the toothed disc 1 can be rotated to rotate the printing belt, but the adjacent rotor is Does not rotate. There are various possible reasons for this, but the main ones are to increase the diameter of the rotating shaft of the adjacent rotor, to reduce the deviation of the toothed disc 1 of the rotor, and to further improve the circular convex body 3 If the frictional resistance between the protrusions 6 on the surface of the cylindrical body 2 and the print belt 9 is greater than the frictional resistance between the receiving plate 8 and the print belt 9, If not, the print belt will not rotate, so tension is applied to the print belt so that it will always be large. This tension is smaller than the conventional rotary rubber stamp by the contact resistance between the rotor and the print belt due to rotor shake.

A second embodiment of the present invention is shown in FIGS. 5, 6 and 7. The description of the configuration overlapping with that of the first embodiment will be omitted. The concave portion 5 is an equilateral triangle having a side of 16 mm 2 and a depth of 5 mm, and is provided on the toothed disc 1 side of the tubular portion 2. The circular convex body 3 has a circular shape with a diameter of 9 mm and a length of 5 mm, and is provided on the side surface of the other end of the cylindrical portion 2.

A third embodiment of the present invention is shown in FIGS. 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. On the end surface 2 ′ of the tubular portion 2, three semi-spherical projections 15 having a radius of 0.5 are evenly installed. The depth of the concave portion 5 is the same as the length of the circular convex body 3. As shown in FIG. 4, when this rotor is made of a rubber stamp, the end face 2 ′ of the tubular portion 2 of each rotor is equal to the end face 2 ″ of the tubular portion 2 of the adjacent rotor by the length of the protrusion 15. That is, the intervals are 0.5 mm, and the contact resistance between adjacent rotors is small.The places where the protrusions 15 can be provided are both end faces 2 ′, 2 ″ of the cylindrical portion 2 or the convex body 3. Can be provided on at least one of the end face 3'of the base or the bottom surface 5 "of the circular concave portion 5. However, when provided on a plurality of places, the protrusions 15 must be set so as not to contact each other. Since the shape of the protrusion 15 is to reduce the contact area between the adjacent rotors, the point contact by the polygonal pyramid shape such as the triangular pyramid shape or the apex of the triangular section is provided at the above-mentioned location. Line contact or small surface contact, and these are the end surfaces 2 '. 2 ″, 3 ′ or the bottom surface 5 ″ may be provided in any shape such as a radial shape, a circular shape, an arc shape, or a linear shape.

[0012]

【effect】

 The present invention is configured as described above and has the following effects. A rotor for a rotary rubber stamp in which a toothed disc 1 is stretched at one end of a cylindrical portion 2 and a circular convex body 3 and a polygonal concave portion 5 are separately provided on both side surfaces of the cylindrical portion 2. Therefore, (1) it is possible to make 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 5", the contact resistance of each rotor can be made smaller, so that the rotational force can be more reliably transmitted to the print belt. Can be made

[0013]

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment.

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

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

FIG. 4 is a partially broken cross-sectional view of a rotary rubber stamp using Example 1.

FIG. 5 is an upper left perspective view of the second embodiment.

FIG. 6 is a lower right perspective view of the second embodiment.

FIG. 7 is a sectional view taken along line BB of Example 2.

FIG. 8 is a perspective view of the third embodiment.

FIG. 9 is a sectional view taken along line CC of Example 3.

FIG. 10 is a partially broken sectional view of a conventional rotary rubber stamp.

FIG. 11 is a partially broken sectional view of a conventional rotor and shaft.

FIG. 12 is a partially broken sectional view of a conventional rotor, a print belt, and a shaft.

FIG. 13 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 Circular convex body 5 Concave 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, a rotor for a rotary rubber stamp, wherein a circular convex body 3 and a polygonal concave portion 5 are separately provided on both side surfaces of the cylindrical portion 2. 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 convex body 3 or the bottom surface 5" of the circular concave portion 5.