JP2568580Y2 - Dot impact printer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dot impact printer.

[0002]

2. Description of the Related Art A conventional dot impact printer is
The bottom of the frame made of the metal material is placed on a table for operating this dot impact printer as it is, or a single vibration damping material provided on the bottom of the frame described above, for example, from rubber or the like It is designed to be installed on a table via the installation feet.

[0003]

In the above-mentioned conventional dot impact type printer, mechanical vibration is generated with the printing operation. This vibration is transmitted to the table where the printer is located without being attenuated, and adversely affects other devices installed on the same table, especially devices that are sensitive to mechanical vibration. There was a drawback that caused.

An object of the present invention is to provide a dot impact type printer which absorbs mechanical vibrations generated during the above-mentioned printing operation of the printer and does not transmit the mechanical vibrations to a table on which the printer is installed. Is to do.

[0005]

SUMMARY OF THE INVENTION A dot impact printer according to the present invention is a dot impact printer which prints on a sheet mounted on a predetermined portion in accordance with a signal input from the outside. Female screw portions provided at a plurality of locations on the bottom surface of the frame of the dot impact printer having a symmetric axis, and three or more first metal plates in the form of a flat plate in which the top surface of the wide surface contacts the bottom surface of the frame; A flat first damping member having an upper surface bonded to the lower surface of each of the first metal plates, and a flat first damping member having an upper surface bonded to the lower surface of each of the first vibration members. A second metal plate, a second vibration-damping member having a hardness different from that of the first vibration-damping member in a flat plate shape having an upper surface bonded to a lower surface of each of the second metal plates; That A plurality of first through holes perpendicularly penetrating the wide surface of the first metal plate at a plurality of locations of the first metal plate; and the first and second coaxial holes coaxial with the first through hole. A second through hole penetrating the vibration damping member and the second metal plate and having a diameter larger than the diameter of the first through hole; and a second through hole inserted into the second through hole and through the first through hole. And a screw that is screwed to the female screw portion to fix the first metal plate to the frame.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a partial vertical sectional view showing an embodiment of the dot impact type printer of the present invention.

As shown in FIG. 1, a dot impact printer according to this embodiment includes a dot impact printer having a printer frame 1 and a flat metal plate having an upper surface in contact with the bottom of the printer frame 1. 3, a flat first damping member 4 having an upper surface bonded to the lower surface of the metal plate 3 with an adhesive, and a metal plate 5 having an upper surface bonded to the lower surface of the first vibration damping member 4. A second vibration damping member 6 having an upper surface adhered to the lower surface of the metal plate 5, a female screw portion 9 provided at a plurality of locations on the bottom surface of the printer frame 1 and having a longitudinal direction in the vertical direction, and a female screw portion 9. Metal plate 3 corresponding to
A plurality of through holes 10 vertically penetrating through the wide surface of the first through hole, and the first through hole 10 and the second through hole 6 coaxial with the through hole 10 and through the metal plate 5 and larger than the through hole 10. It has a through hole 8 having a diameter, and a screw 2 screwed into the female screw portion 9 and inserted into the through hole 8 to fix the printer frame 1 and the metal plate 3 through the through hole 10.

The outlines of the wide surfaces of the metal plates 3 and 5 and the first vibration damping member 4 and the second vibration damping member 6 may be substantially the same, and their shapes may be circular or any other shape. Also, the first
The materials are selected so that the hardness of the vibration damping member and the second vibration damping member are different from each other, and the mechanical resonance frequencies of the vibration damping members 4 and 6 are made different from each other. As a material for these damping members, for example, rubber may be used.

As shown in FIG. 1, one set of feet 11 is constituted by one damping member 4 and 6 and one metal plate 3 and 5 respectively, and these feet 11 are formed at least. Three sets may be prepared, and these three sets of feet 11 may be fixed to the bottom of the printer frame 1 at different positions using screws 2.

FIG. 2 is a perspective view showing an example of a dot impact type printer having such a foot portion 11.

[0012]

As described above, the dot impact type printer according to the present invention has the first and second flat damping members having different hardnesses interposed between the metal plates 3 and 5. The mechanical vibration frequency of the dot-impact printer during printing operation can be absorbed by these damping members. It is possible to prevent the mechanical vibration generated by the above-described printer from being transmitted to the desk where the printer is installed, and to prevent the malfunction caused by the mechanical vibration from occurring to other devices installed on the same desk. It has the effect of being able to.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view showing one embodiment of a dot impact type printer of the present invention.

FIG. 2 is a perspective view of the dot impact printer of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printer frame 2 Screw 3 Metal plate 4 First damping member 5 Metal plate 6 Second damping member

Claims (1)

(57) [Scope of request for utility model registration] 1. A dot impact printer which prints on a sheet mounted on a predetermined portion in response to a signal input from the outside, wherein the frame of the dot impact printer has a symmetry axis parallel to a vertical direction. Female screw portions provided at a plurality of locations on the bottom surface, three or more first metal plates in the form of a flat plate whose upper surface of a wide surface is in contact with the bottom surface of the frame, and an upper surface on the lower surface of each of the first metal plates A first damping member having a flat plate shape, a second metal plate having a flat plate shape having an upper surface bonded to a lower surface of each of the first damping members; A second vibration-damping member having a hardness different from that of the first vibration-damping member in a flat plate shape having an upper surface bonded to a lower surface thereof, and a second vibration-damping member having a hardness different from the hardness of the first vibration-damping member; 1 Wide surface of metal plate A plurality of first through holes perpendicularly penetrating the first through hole, and a diameter of the first through hole passing through the first and second damping members and the second metal plate coaxially with the first through hole. A second through hole having a larger diameter, and screwed into the female screw portion via the first through hole inserted into the second through hole and fixing the first metal plate to the frame. A dot impact printer comprising a screw.