JPS63280676A - Silencing structure of printing device - Google Patents

Abstract

PURPOSE:To increase a noise damping effect and improve operability by concentrating both insertion and delivery ports of printing paper at one place facing downward at the rear and forming a passage from a printing point to a paper delivery port in a bent duct. CONSTITUTION:Printing noise generated in a printing head part is reflected and damped in a paper transport path which forms a bent duct up to a printing paper delivery port 9. In addition, double or triple covers 2, 3 are provided which give a damping effect to a noise penetrating through the covers. Further, the noise generated in a printer is not directly released nor diffused backward, thus preventing the noise backward of the printer by setting the insertion and delivery ports for paper facing the back and downward. The paper is also easily set by providing the damping covers 2, 3 which are opened backward.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a soundproof structure for a printer device, in which printing paper is introduced into a part of the casing, and the printed paper is taken out of the casing. The present invention relates to a sound-deadening structure for use in equipment having an aperture for transmitting sound.

[Conventional technology]

Conventional devices have a structure in which only the paper feed port is closed, as described in Japanese Patent Application Laid-Open No. 60-24985, or
As in No. 18706, an elastic member and a paper feed roller were installed at the paper entrance/exit portion of the casing to close the opening.

[Problem that the invention seeks to solve]

In the first conventional technique, no consideration is given to soundproofing of the paper inlet, and since the opening direction is also backward, sound is directly radiated and diffused toward the rear of the apparatus.

No consideration was given to reducing noise for people sitting behind the equipment.

Furthermore, in the second conventional technology, consideration has not been given to operability, such as the need to pass the paper between the rollers of the summer paper insertion section, wrap it around the platen shaft, and then pass the paper between the rollers of the paper ejection section. Not yet.

Another problem is that a drive mechanism that is synchronized with the platen is required to prevent paper jams.

Furthermore, since the rotating part of the paper feed roller is exposed outside the printer case, there is a risk of getting your fingers caught and getting injured.There is no consideration given to safety. ? , = 7' A large abzone that covers the entire link is commercially available, but it has a great effect on reducing noise, but the case is large and it is difficult to operate, such as having to go to the back of the printer when setting paper. Furthermore, the installation space required is 1.5 to 2 times that of the case where the printer is used alone.

It is an object of the present invention to provide a noise reduction structure that overcomes these drawbacks, has a large noise reduction effect, is compact, has good operability, and can be easily applied to existing printers.

[Means for solving the problem] The above purpose is to consolidate the printing paper inlet/outlet openings in one place facing downward at the rear, and to form a curved duct-like path from the printing point to the paper outlet, thereby reducing the amount of paper generated from the print head. This is achieved by attenuating the printing sound within this duct and by directing the sound emission direction downward to reduce the spread of sound toward the rear of the device.

Further, by configuring the sound-absorbing structural cover separately from the printer body and providing a holding means that can be easily attached to and detached from the printer body, the present invention can be easily applied to existing printers.

[Effect]

The printing sound generated from the print head section is reflected and attenuated within the paper conveyance path that forms a curved duct at the print paper exit.

Furthermore, the cover can be configured in two or five layers, which is effective against sound passing through the cover.

Furthermore, by locating the paper inlet and outlet facing downward at the rear,
The noise generated inside the printer is not directly emitted or diffused to the rear, so the noise pipe at the rear of the device is low. can be saved.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a right side view of a state in which a silencer is sold to a printer device. Figure 92 shows the printing paper 4 on the tractor 7.
The right side view shows the silencer opened to set it. FIG. 6 is a perspective view showing the fitting portion of the silencer expanded, and FIG. 4 is a perspective view showing the assembled state of the silencer.

One printing mechanism with five printing heads is housed in an upper blade/bar 51 and a lower cover 52, and the printing paper 4 is introduced from a lower opening 16 at the rear of the upper cover 51.

It is inserted into the printer through the rear opening 55 of the upper cover 51.

The inserted print paper 4 is wound around a platen 6, passes between the print head 5 and the platen 8, is set on the tractor 7, and then passes through a duct formed by the first silencer cover 2 and the silencer cover 3 of wI2. The paper is sent out through the paper exit opening 9 through the space 6t.

When the printing paper 4 passes through the platen 8, characters are printed by the impact force of the print head 5. The printing paper 40 passage from the paper introduction opening 16 to the paper exit opening 9 is covered with a first silencer cover 2z and a second silencer cover 5.

The silencer cover 2 is rotatably supported by a defeating shaft 15 via a bracket 19 which is supported by a fitting 18 provided at the rear of the printer upper cover 51.
The second fat throat (rotated backwards about 90" to open (5). When opened, the stopper 17 prevents it from falling backwards or accidentally returning to the front. When setting the printing paper 4, with the silencer cover 2 open, the opening 16 formed between the printing paper 4t-1 and the opened silencer cover 2 at the rear of the printer.
The printing paper 4 is introduced into the tractor 7 through the opening 53 at the rear of the upper cover 51 and wound around the platen 8 .

The silencer cover 3 is axially supported by a bin 29 so as to be able to rotate once through a fulcrum metal fitting 28t provided at the rear of the first silencer cover 2, making it easy to cut and take out the paper 4.

When the first silencer cover 2 is closed with the printing paper 4 set on the tractor 7 and printing is started, the printing paper passes through the space 6 between the first silencer cover 2 and the second silencer cover 6 and exits at the paper outlet 9. It is ejected outside the printer.

When the print paper 4 passes through this duct interior space 6, the impact sound emitted from the print head 5 also traverses the same space and exits through the paper outlet 9. However, this impact sound is caused by the inside space 6 of the duct.
Since the duct interior space 6 is curved when passing through the duct, the impact sound is attenuated because the sound undergoes diffuse reflection (repeatedly) and exits.When the printing paper 4 passes through the duct interior space 6f, the silencer cover 2 In order to prevent the sheets from sticking together due to friction, ribs 20 and 30 are provided at the portions where the sheets come into contact to prevent the sheets from jamming.

Further, by providing the sound absorbing material 11 at the outlet of the duct internal space 6, the amount of noise attenuation can be increased. If only the sound absorbing material 11 is used, the print paper will stick due to friction and paper jam will occur, so a paper guide 12 with holes in the surface is provided to improve the running performance of the print paper.

The paper guide 16 is located inside the first silencer cover 2.
Further, the paper kite 12 is provided inside the second silencer cover 3 in order to improve paper running performance in the paper introduction section and to narrow the opening area so as to reduce noise emitted from the paper introduction opening 16. There is.

Next, install and remove the silencer cover.

As shown in FIG. 2, with the silencer cover 2.5 open, hold the lower end of the bracket 19 and lift it upward or push it downward, allowing for one-touch installation.

This fitting part is shown in FIG. By fitting with the printer upper cover 51VC, the printer upper cover 51VC is held.

〔Effect of the invention〕

According to the present invention, the housing cover can have one opening facing downward on the rear surface, and the paper path from the print head, which is a source of noise generation, to the paper entrance/exit can be made into a curved duct, and the opening can be reduced to the minimum necessary for only the paper entrance/exit. It can be made small and has a large effect on noise reduction.

Furthermore, paper can be easily set by opening the sound-deadening structure cover to the rear.

In addition, this sound-deadening structure cover can be installed and removed with one touch, so it can be attached to existing equipment in a short time.

By installing this silencer, we were able to significantly reduce the noise by approximately 8 da.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a printer device according to an embodiment of the present invention in which a sound-deadening structure cover of the present invention is mounted, and FIG. 2 is a state in which the sound-deadening structure cover is opened when printing paper is set in the printer device. Side view 1 and Figure 5 are perspective views of the hook support part for attaching the silencer cover of the present invention with one touch;
The figure is a perspective view showing the entirety of the present invention. 2... Silencer cover. 3... Silencer cover. 4...Print paper, 5...Print head. 6... Gerd space, 7... Tractor. 8...Platen, 9...Paper exit opening. 18...Mounting tool, 19...Bracket. Figure 1 Figure 3

Claims (1)

[Claims] 1. In a printing device that impulsively prints on paper and sends the printed paper out from inside a case in which a mechanism is housed, a support member provided in the case and a support member that fits into the support member. a fitting member for attaching the silencer cover to the printing device; a first silencer cover rotatably supported by the fitting member; and a first silencer cover rotatably supported by the first silencer cover. a second silencer cover, the paper conveyance path formed by the first silencer cover and the second silencer cover is formed into a curved duct shape, and the paper introduction hole and the paper outlet are provided at one location facing downward at the rear of the device. A noise-reducing structure for a printing device characterized by being arranged in a concentrated manner.