JPH0744698U - Rotating rubber stamp rotor - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a rotor that does not require a shaft in a rotating rubber stamp, and the printing 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 disk 1 is stretched at one end of a cylindrical portion 2, and polygonal convex bodies 3 and circular concave portions 5 are separately provided on both side surfaces of the cylindrical 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. 12), the frame 20 holds the rotor 22 with the shaft 21, the print belt 9 is stretched around the rotor 22 and the frame 20 or the receiving plate 8, and the rotor 22 rotates. 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 about 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 blur will disappear, but if it is made smaller or smaller, the tightening of the rotor and the shaft will increase, and the rotor will be tightened. It becomes difficult to rotate.

Therefore, the clearance S2 is increased. (FIG. 13) Therefore, when the print belt 9 stretched around the rotor 22 is rotated, the blur angle θ2 generated by the clearance S2 causes the rotor 22 and the back surface of the print belt 9 to float. As a result, the rotor 22 and the print belt 9 are less entangled with each other, and it is difficult to transmit the rotational force from the rotor to the print belt 9. (FIG. 14) For that reason, 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 each 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. Further, 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 hooked, so that the rotational force cannot be reliably transmitted and cannot be used by idling.

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 (a point close to the circumference of the rotor) because the shaft diameter is large even if the same clearance S2 necessary 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 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 also 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 hole of the rotor 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 so, or it causes an idle rotation. In addition, if too much tension is applied to the print belt, the print belt will be stretched, taking into consideration the print belt hang-up. Therefore, the present invention provides a rotor that does not require a shaft for holding the rotor, in which the clearance S2 is provided at a point farther from the center of rotation (a point closer to the circumference of the rotor). When used as 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 polygonal convex body 3 and a circular concave portion 5 are separately provided on the side surfaces of both end portions of the tubular portion 2.

[0006]

[Action]

 The convex body 3 of one rotor is inserted into the circular concave portion 5 of the adjacent rotor, and a plurality of rotors are sequentially inserted and connected to each other. It can rotate. Regarding the blur, when comparing the diameter D1 of the virtual shaft created by the corner 4 with the diameter D2 of the conventional shaft, D1> D2, and the clearance required for rotation (the clearance S4 between the corner 4 and the circular recess 5 is the shaft diameter and the rotation). When the clearance S2 of the diameter of the child is used and S1 = S2) is provided, the blur angle θ decreases if the diameter to be supported is large. Therefore, the print belt is securely hooked on the rotor, and can be rotated with a force smaller than that of 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 side of the other end of the cylindrical portion 2 has one side 12. An equilateral triangular convex body 3 having a length of 5 mm and a length of 1 mm is provided. Further, a circular concave portion 5 is formed in a circular concave shape having a depth of 1 mm and a diameter of 15 mm on the side surface of the end portion of the cylindrical portion 2 on the toothed disc 1 side. The corner 4 of the convex body 3 is formed in a direction parallel to the axial direction and is sharply pointed. However, it is not necessarily pointed, and may be appropriately rounded with a radius of 0.5 mm to 10 mm. Also, since the distances from the center of the shaft to each corner 4 are all set to 7.2 mm, even if the convex body 3 is inserted into the circular concave portion 5, each rotor is independent and reliable. Rotate. The shape of the convex body 3 is not specified as long as the distance from the center of the axis to each corner 4 is the same, and the end surface of the convex body 3 may be curved. In Example 1, the length of the convex body 3 and the depth of the circular concave portion 5 are the same, but at least about 1 mm is required, and the size, strength, etc. of the convex body 3 are taken into consideration and appropriately determined. do it. Further, the diameter of the circular concave portion 5 is preferably at least about 1/3 of the diameter of the cylindrical portion 2, but it goes without saying that it is more preferable if it is close to the diameter of the cylindrical portion 2.

Reference numeral 6 denotes a projecting body, which is provided on the outer peripheral surface of the cylindrical portion 2 at equal intervals. 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 for the rotor of the first embodiment, polypropylene, polyethylene, ABS resin, acrylic resin, polyacetal resin, or other synthetic 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 circular concave portions 5 of the adjacent rotors of the respective convex bodies 3, and the five rotors are connected. A frame 7 is made of the same material as that of the rotor. The frame 7 is divided into two parts on the left and right sides, and is integrated by a fixing ring 12 and a receiving metal 8. The convex body 3 of the first rotor is inserted into the concave portion 10 having the same shape as the circular concave portion 5 provided on one inner side surface of the frame 7, and the other inner side surface of the frame 7 is A convex portion 11 having the same shape as that of the convex body 3 is provided and is inserted into the circular concave portion 5 of the fifth rotor. The money receiver 8 has tabs 13 at both ends and is fitted to the lower end of the frame 7. The material of the receiving metal 8 may be any material that can be used normally, such as metal and synthetic resin. Each of the print belts 9 is stretched around the receiving member 8 and the cylindrical portion 2 of each of the rotors. 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 the conventional rotary rubber stamp, and the toothed disc 1 can be rotated to rotate the print 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, reduce the blurring of the toothed disc 1 of the rotor, and If the frictional resistance between the circular concave portion 5 and the protrusion 6 on the surface of the cylindrical body 2 and the print belt 9 is larger than the frictional resistance between the receiving metal 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. The description of the configuration overlapping with the first embodiment will be omitted. The circular concave portion 5 is provided with a depth of 5 mm and a diameter of 15 mm. The convex body 3 has a length of 5 mm, and two rectangular shapes of 14 mm and 4 mm are combined in a cross shape. The corner 4 is rounded with a circle having a half diameter of 0.5 mm.

A third embodiment of the present invention is shown in FIGS. 7, 8 and 9. The description of the configuration overlapping with that of the first embodiment will be omitted. In this embodiment, the hexagonal convex body 3 is provided on the toothed disc 1 side, and the circular concave portion 5 is provided on the side surface of the other end of the tubular portion 2. The distances from the center of the shaft to the corner 4 are all set to 7.3 mm.

A fourth 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 circular concave portion 5 is the same as the length of the convex body 3. When this rotor is made into a rubber stamp as shown in FIG. 4, 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 the adjacent rotors is small.The place where the protrusion 15 can be provided is at 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, it must be set so that the projections 15 do not contact each other. Since the shape of the protrusion 15 is to reduce the contact area of the adjacent rotors, the point contact by 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 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.

[0013]

【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 tubular portion 2 and polygonal convex bodies 3 and circular concave portions 5 are separately provided on both side surfaces of the tubular 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 rotating shaft of each rotor can be made large, the shake of the rotor can be made small. Therefore, the rotational force can be reliably transmitted to the printing belt without applying excessive tension to the printing 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.

[0014]

[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 a front view of the second embodiment.

FIG. 6 is a right side view of the second embodiment.

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

FIG. 8 is an upper left perspective view of the third embodiment.

FIG. 9 is a lower right perspective view of the third embodiment.

FIG. 10 is a sectional view taken along line CC of Example 3.

FIG. 11 is a perspective view of the fourth embodiment.

FIG. 12 is a sectional view taken along line DD of FIG.

FIG. 13 is a partially broken sectional view of a conventional rotary rubber stamp.

FIG. 14 is a partially broken sectional view of a conventional rotor and shaft.

FIG. 15 is a partially broken sectional view of a conventional rotor, print belt, and shaft.

FIG. 16 is a partially broken cross-sectional view using a large-diameter shaft of a conventional rotor

[Explanation of symbols]

 1 Toothed disc 2 Tube part 3 Convex body 4 Corner 5 Circular concave part

[Procedure amendment]

[Submission date] July 23, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[0014]

[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 a perspective view of the second embodiment.

FIG. 6 is a sectional view taken along line BB of Example 2.

FIG. 7 is a left upper perspective view of the third embodiment.

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

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

FIG. 10 is a perspective view of the fourth embodiment.

FIG. 11 is a sectional view taken along line DD of FIG.

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

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

[Explanation of reference numerals] 1 toothed disc 2 tubular portion 3 convex body 4 corner 5 circular concave portion

Claims (2)

[Scope of utility model registration request] 1. A toothed disc 1 is stretched at one end of a tubular portion 2,
Further, the polygonal convex body 3 and the circular concave portion 5 are separately provided on the side surfaces of both ends of the cylindrical portion 2 for a rotary 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 projection 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.