JPS6046282A - Printer with sound-absorbing device - Google Patents

Abstract

PURPOSE:To contrive to reduce noise and to reduce the leakage of noise to the exterior of a printer, by a construction wherein a sound-absorbing roller and a press roller for a paper being passed are so provided as to seal off an opening part of a sound-insulating cover, in a printer comprising a sound-insulating cover. CONSTITUTION:To abbsorb vibrations of a paper 5, the sound-absorbing roller 12 is provided in an absorbing member 2. To stop the vibration of the paper 5, a press roller 13 is provided in the interior of the sound-insulating cover 4, and a press roller 14 is provided at the position of the cover 3. Pulleys 15, 16 are connected to each other by a belt 17 so that the roller 12 is rotated in synchronism with a platen 1 and no undue force or no sag is generated in the paper 5. Accordingly, noise generated by vibrations of the paper 5 can be reduced, and an inserting port 10 and a discharging port 11 for the paper 5 are stopped up, so that the noise generated in the printer is prevented from leaking out to the exterior of the printer.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printer having a platen, and more particularly to a printer equipped with a sound absorbing device.

BACKGROUND TECHNOLOGY FIG. 1 is an external view of a conventional printer, and FIG. 2 is a sectional view taken along line A--A in FIG.

1 and 2, 1 is a platen, 2 is a sound absorbing member for preventing noise inside the device from leaking to the outside, and 3 is a platen.
4 is a sound insulating cover, 5 is a printing paper (hereinafter abbreviated as paper), 6 is a feed roller, 7 is a paper press roller for keeping the paper in close contact with the platen, and 8 is a paper presser for holding the paper 5 sent to the platen 1. A printing wheel for printing, 9 a printing hammer for striking the printing wheel 8, 10 an insertion port for the paper 5, and 11 a paper 5 discharge port.

Next, the paper feeding operation of the conventional printer will be explained.

In FIGS. 1 and 2, when paper 5 is drawn into the printer from an insertion slot 10 provided on the top of the printer by the platen 1 and the paper presser roller, it rotates while remaining in close contact with the platen l by the paper presser roller.

At this time, when the printing hammer 9 hits the printing wheel 8, the paper 5 will be printed.

Thereafter, the platen 1 and the feed roller 6 send the paper out of the apparatus from the discharge port 11 provided on the top surface of the printer, but at the moment of printing, the platen 1 is also subjected to impact, causing vibration.

On the other hand, when the printer is operated, vibrations are naturally generated in the apparatus, and these vibrations are transmitted from the platen 1 to the paper 5 together with the above-mentioned vibrations. Since there is nothing to suppress the vibrations transmitted to the paper 5, the vibrations propagate to the outside of the apparatus and become noise. In addition, the insertion port 10 and the ejection port [11
1 is narrowed by the sound insulating cover 3゜4 and the sound absorbing member 2 to prevent noise from leaking out of the apparatus, but this opening cannot be eliminated in order to ensure a passage for the paper. There is a drawback that noise generated within the device leaks out of the device from the insertion port 10 and the discharge port 11.

-View An object of the present invention is to provide a quiet printer by reducing the noise generated when the printer is operated and by reducing the leakage of the noise to the outside of the device.

composition The configuration of the present invention will be explained together with examples.

FIG. 3 is a side view showing the configuration of essential parts of an embodiment of the present invention. Components that are the same as those in FIG. 2 are given the same reference numerals, and repeated explanations thereof will be omitted.

In this embodiment, as shown in FIG. 3, a sound absorbing roller 12 made of an appropriately soft material is provided within the absorbing member 2 in order to absorb the vibrations of the paper 5.

The paper 5 moving in contact with two symmetrical surfaces with respect to the central axis of the sound absorbing roller 12 is pressed against the sound absorbing roller 12 to remove the paper 5.
A pressure roller 13 is provided inside the sound insulating cover 4 to stop the vibration of the sound insulating cover 4. On the other hand, a pressure roller 14 is placed in a position inside the sound insulation cover 3 that is symmetrical to the pressure roller 13 with respect to the sound absorption roller 12.
will be established. A pulley 15 is attached to the platen 1, a pulley 16 is attached to the sound absorbing roller 12, and they are connected by a belt 17 so that they rotate synchronously. As a result, the sound absorbing roller 12 moves to the platen l.
The paper 5 rotates in synchronization with the paper 5, and can be moved without any excessive force or slack on the paper 5.

Furthermore, vibration of the paper 5 is suppressed by the sound absorbing roller 12 and the pressure rollers 13 and 14, so that the noise generated by the paper 5 can be reduced. Further, since the pressure rollers 13 and 14 are in close contact with the sound absorbing roller 12, the insertion opening 10 and the discharge opening 11 for the paper 5 provided between the sound absorbing member 2 and the sound insulation covers 3 and 4 are closed. This prevents noise generated within the device from leaking outside the device.

Here, the pulleys 15 and 16 and the belt 17 provided for synchronously rotating the platen 1 and the sound absorbing roller 12 may be any synchronously rotating means having similar functions. For example, said pulley 15.1
6 may be replaced with a sprocket, and the belt 17 may be replaced with a sprocket chain. Alternatively, as shown in FIG. 4, a synchronous rotation means may be used in which gears 18 and 19 are attached to the platen 1 and the sound absorbing roller 12, respectively, and the connection between the two is performed by a gear 20 provided between the gears 18 and 19. Furthermore, as shown in FIG. 5, a drive roller 21 that transmits rotation by adhesive force is provided to the platen l, a parasenger roller 22 is provided to the sound absorption roller 12, and a synchronous rotation means is provided in which the two are connected by an idle roller 23. But that's fine.

As explained above, according to the novel technical means disclosed by the present application, the following effects can be obtained.

(1) The printer can be made quieter by suppressing paper vibrations and reducing the number of openings in the cover.

(2) Damage to the paper can be prevented by suppressing vibrations during paper feeding, ejection, and printing.

(3) With the technical means mentioned in (2) above, it is possible to use even weak and thin paper, and the capabilities of the printer can be expanded.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the appearance of a conventional printer. Fig. 2 is an enlarged view of the main part of a cross section taken along line A-A in Fig. 1, Fig. 3 is a side view showing the main part configuration of an embodiment of the present invention, Figs. 4 and 5. FIG. 2 is a side view of a main part of another embodiment of the synchronous rotation means of the present invention. 1...Platen, 2...Sound absorbing member, 3.4...
Sound insulation cover, 5...Paper, 6...Feed roller, 7...Paper press roller, 8...Print wheel, 9
...Printing hammer, 10...Paper insertion slot, 11
...Paper discharge port, 12...Sound absorption roller, 13.1
4... Pressure roller, 15.16... Pulley, 17
... Belt, 18.19 ... Gear, 20 ... Intermediate gear, 21 ... Drive roller, 22 ... Parasenger roller, 23 ... Idle roller, Agent: Patent attorney Shukidai Akita Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A printer having a platen and a sound insulating cover, comprising a sound absorbing roller made of a soft material suitable for absorbing sound and rotating in synchronization with the platen, and rollers for holding down passing paper provided on both sides of the sound absorbing roller. . A printer with a sound absorbing device, characterized in that the sound absorbing roller and the passing paper pressing roller are provided so as to seal an opening of the sound insulating cover.