JP2587268Y2 - Rotary rubber stamp rotor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary rubber stamp rotor for use in a rotary rubber stamp.

2. Description of the Related Art A conventional rotary rubber stamp (FIG. 9) has a structure in which a frame 20 holds a rotor 22 with a shaft 21 and a printing belt 9 is stretched over the rotor 22 and the frame 20 or the receiving member 8.
To rotate the print belt 9. In order to hold the rotor 22 on the shaft 21, these rotary rubber stamps are fixed to the frame at both ends of the shaft 21 with screws 23. Further, the shaft 21 is thinner than the diameter of the rotor 22 by about 1/10, and the center hole through which the shaft 21 of the rotor 22 passes is slightly larger than the diameter of the shaft 21. Printing belt 9
This is near the half of the radius of the rotor 22. Therefore, when the rotor 22 is held on the shaft 21, the rotor 22 has a blur angle θ about the shaft 21 with respect to both ends of the shaft 21, and particularly, The blur angle θ2 of the outer shell (the toothed disk) becomes large. This is because in such a type of rotating rubber stamp, a clearance S was 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 minute or small, there is no blur, but if it is made small or small, the tightening of the rotor and the shaft becomes large, Is difficult to rotate.

Therefore, the clearance S2 is increased. (FIG. 10) When the print belt 9 stretched on the rotor 22 is rotated for that purpose, the back surface of the rotor 22 and the print belt 9 floats due to the shake angle θ2 generated by the clearance S2. The engagement between the rotator 22 and the printing belt 9 was reduced, and it was difficult to transmit the rotational force from the rotator to the printing belt 9. (FIG. 11) As a result, the printing belt 9 was idle. Extra tension is applied to the print belt 9 in order to improve the idling by the shake angle θ2. For example, 50-5032
And Japanese Utility Model Publication No. 50-17454. In each of these inventions, the rotor is held by the shaft 21, and the printing belt is always under tension, and the printing belt is stretched. This is the rotor's shake angle θ2
This is because the tension applied to the printing belt 9 is increased in order to secure the printing belt 9 and to secure the printing belt 9.
The tension may be adjusted appropriately, but the adjustment of the tension is delicate. Further, when the tension is reduced, the blurring angle θ of the rotor 22 is generated as described above, and the engagement of the printing belt 9 is not sufficient.

Next, the printing belt 9 is determined based on the shake angle θ.
The shaft diameter is increased in order to improve the idle rotation. This is a point at which 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 when the same clearance S2 required for rotation is provided. Improve the idling of the belt 9. However, increasing the size of the shaft 21 ′, when the finished product,
It is heavy, expensive, and difficult to handle. (FIG. 12) 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 printing belt 9 is not stretched, the purpose, the configuration, and the effect are different.

[0004]

[Problems to be solved by the present invention] 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 the blur, and the printing belt is hung on the rotor. It is uncertain, requires a large force to rotate the printing belt, and causes idle rotation. Also, if the printing belt is applied with a large tension so much as to take into account the hanging of the printing belt, the printing belt elongates. Therefore, in the present invention, the clearance S
2 is provided at a point far from the center of rotation (a point close to the circumference of the rotor) to provide a rotor that does not require a shaft for holding the rotor. A rotating rubber stamp rotator that can transmit a rotational force to a printing belt without applying a large tension as in the prior art, can rotate with a smaller force when rotating, and can surely rotate without idling. To provide.

[0005]

Means for Solving the Problems A toothed disk 1 is stretched at one end of a cylindrical portion 2 and a cylindrical body 3 and a concave groove 5 are separately formed on both side surfaces of the cylindrical portion 2. In addition, at least three raised portions 4 are provided on the inward wall surface 5 ′ of the concave groove 5.

[0006]

The cylindrical body 3 of one rotor is inserted into the groove 5 of the adjacent rotor, and a plurality of rotors are inserted and connected in sequence.
No shaft is required, and each rotor can rotate independently and reliably. When comparing the diameter D1 of the imaginary shaft formed by the raised portion 4 and the diameter D2 of the conventional shaft with respect to blur, D1> D2, and the clearance required for rotation (the clearance S1: the clearance between the raised portion 4 and the concave groove 5 is equal to the shaft diameter). When a clearance S2 is set for the rotor hole diameter (S1 = S2), the larger the diameter to be supported, the smaller the blur angle θ. Therefore, the printing belt is securely hooked on the rotor, and can be rotated with a smaller force than before, and can be reliably rotated without running idle.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below.
Embodiment 1 of the present invention is shown in FIGS. 1, 2 and 3. FIG. Reference numeral 1 denotes 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. 2 is diameter 20mm, thickness 5
mm, and has a diameter smaller than that of the toothed disk 1, the toothed disk 1 is provided at one end thereof, and a groove 5 is formed on a side surface of the toothed disk 1. 1mm deep, large diameter 14
mm and a small diameter of 9 mm in a donut shape. The other end is provided with a cylindrical body 3 having a diameter smaller than that of the cylindrical section 2 and a large diameter of 12.5 mm, a wall thickness of 0.8 mm, and a length of 1 mm. Three raised portions 4 having a height of 0.5 mm are uniformly arranged on the inward wall surface 5 'of the concave groove 5. The raised portion 4 is in a direction parallel to the axial direction and has a semicircular cross section, but does not necessarily have to be semicircular. The shape may be a semi-ellipse, an isosceles triangle, or the like. The number of the raised portions 4 is three to six.
Individual is good. The concave groove 5 with the raised portion 4 has a diameter and a length in which the cylindrical body 3 can be inserted. In the first embodiment, the length of the cylindrical body 3 and the depth of the concave groove 5 are the same. If the small diameter of the concave groove 5 is at least 1/3 or more of the diameter of the cylindrical portion 2, the effect of the present invention is remarkably exhibited. It goes without saying that the concave groove 5 only needs to be in the vicinity of the size of the cylindrical portion 2. Further, the length of the cylindrical body 3 is required to be at least about 1 mm, but may be longer than the length of the cylindrical body 2.
It can be determined in consideration of strength and the like. Reference numeral 6 denotes a protruding body, which is provided on the outer peripheral surface of the cylindrical portion 2 at the same interval as the raised portion 4 at equal intervals. The height is usually about 1 mm to 5 mm, but may be appropriately determined in consideration of the sizes of the toothed disc 1 and the cylindrical portion 2. The cross-sectional shape of the projection 6 is an isosceles triangle. The rotor of the first embodiment can be made of a synthetic resin such as polypropylene, polyethylene, ABS resin, acrylic resin, and polyacetal resin.

FIG. 6 is a partially broken sectional view of a rotary rubber stamp using the rotor of the first embodiment. This is a rotary rubber stamp using five printing belts 9 and five rotators. Each of the five rotors is inserted into the groove 5 of the adjacent rotor in which the cylindrical body 3 is adjacent, 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, left and right, and is integrated by a fixing ring 12 and a receiving member 8.
The cylindrical body 3 of the first rotor is inserted into a circular groove 10 having the same shape as the concave groove 5 provided on one inner surface of the frame 7. A cylindrical body 11 having the same shape as the cylindrical body 3 is provided, and is inserted into the groove 5 of the fifth rotor. Each rotor of the first embodiment is connected by a clearance between the raised portion 4 and the outer wall surface of the cylindrical body 3. The raised portion 4 is further provided on the inner wall surface of the cylindrical body 3, and the raised portion 4 It goes without saying that a clearance with the other wall surface of the groove may be provided at the same time. The receiving member 8 is provided with claws 13 at both ends, and fitted to the lower end of the frame 7. The material of the receiver 8 may be any material that can be used normally, such as metal and synthetic resin. Each of the printing belts 9 is stretched over the receiving member 8 and the cylindrical portion 2 of each of the rotors. 14 is a holder. Reference numeral 16 denotes a thin sheet.

The rotary rubber stamp using the rotor of the present embodiment can be used in the same manner as a conventional rotary rubber stamp. To rotate the printing belt, the toothed disk 1 may be rotated. Adjacent rotors do not rotate. Although various factors can be considered as the reason, the main factor is that the diameter of the rotating shaft of the adjacent rotor is increased and the toothed disc 1 of the rotor is increased.
Of the cylindrical body 3 and the raised portion 4 of the concave groove 5 can be reduced.
If the frictional resistance between the protruding body 6 on the surface of the cylindrical portion 2 and the printing belt 9 is not greater than the frictional resistance between the receiver 8 and the printing belt 9, the printing belt Since it does not rotate, the printing belt is tensioned so as to 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 shake of the rotor.

FIG. 4 and FIG. 5 show a second embodiment of the present invention. A description of the configuration having the same dimensions as in the first embodiment will be omitted. A raised portion 4 'having a height of 0.2 mm is provided with a small diameter of 11 mm and a wall thickness of 0.
Three tubes were provided on the inner wall surface of the 7 mm cylindrical body 3. The second embodiment can be used similarly to the first embodiment.

A third embodiment of the present invention is shown in FIGS. Description of the same configuration as that of the first embodiment and the same configuration will be omitted. This embodiment can further reduce the contact resistance between adjacent rotors. A length of 1 mm, a height of 0,
Three 3 mm arc-shaped protrusions 15 were provided at equal intervals. The depth of the concave groove 5 is the same as the length of the cylindrical body 3. When this rotor is a rubber stamp as shown in FIG. 5, the end surface 2 'of the cylindrical portion 2 of each rotor is in the height of the protrusion 15 with the end surface 2 "of the cylindrical portion 2 of the adjacent rotor. The protrusions 15 can be provided at both ends 2 ′ and 2 ″ of the cylindrical portion 2 or at the end surface of the cylindrical body 3. 3 'or at least one of the bottom surface 5 "of the concave groove 5. The shape of the protrusion 15 is to reduce the contact area between adjacent rotors. , A point contact by a polygonal pyramid shape such as a triangular pyramid shape, a line contact by a vertex of a cross-sectional triangle, or a small surface contact, and these are radially, circularly, It may be provided in an arbitrary shape such as an arc shape or a linear shape.

[0012]

[Effect] The present invention has the above configuration and has the following effects.
A toothed disk 1 is stretched over one end of the cylindrical portion 2, and
The cylindrical body 3 and the concave groove 5 are separately provided on both end side surfaces, and at least three raised portions 4 are provided on the inward wall surface 5 ′ of the concave groove 5. (1) It is possible to provide a new rotary rubber stamp that does not use a shaft that has always been used for a conventional rotary rubber stamp. (2) Since the diameter of the rotating shaft of each rotor can be increased, the blur of the rotor can be reduced, so that the tension is not applied to the printing belt more than necessary and the torque can be transmitted to the printing belt reliably. As a result, the idle of the print belt can be prevented, and the print belt does not break. 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 reduced, so that the rotational force can be further transmitted to the printing belt. it can.

[0013]

[Brief description of the 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 a partially enlarged view of a portion E in FIG. 2;

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

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

FIG. 6 is a partially broken cross-sectional view of a rotating 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 the line A'-A 'of the third embodiment of the present invention;

FIG. 9 is a partially broken sectional view of a conventional rotating rubber stamp.

FIG. 10 is a partially broken sectional view of a conventional rotor and shaft.

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

FIG. 12 is a partially broken sectional view of a conventional rotor using a large-diameter shaft.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 toothed disk 2 cylindrical part 3 cylindrical body 4 raised part 5 concave groove

Claims (2)

(57) [Scope of request for utility model registration] 1. A toothed disk 1 is stretched at one end of a cylindrical portion 2;
Further, the cylindrical body 3 and the concave groove 5 are separately provided on both side surfaces of the cylindrical portion 2, and at least three raised portions 4 are provided on the inward wall surface 5 ′ of the concave groove 5. For a rotating rubber stamp. 2. At least both end side surfaces 2 'of the cylindrical portion 2,
2. The rotary rubber stamping rotor according to claim 1, wherein the protrusion 15 is provided on either 2 ", the end face 3 'of the cylindrical body 3 or the bottom face 5" of the concave groove 5.