JPS5933656Y2 - soundproof cover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a soundproof cover that is used for teleprinters, typewriters, etc. and is effective in blocking noise generated inside these devices from propagating to the outside.

Teleprinters, typewriters, etc. are usually used in offices.

For this reason, great efforts have been made in the past to reduce the noise of these devices.

This is even more true for impact printers.

However, since there is a certain limit to keeping the noise of the device itself low, it is useful to use a soundproof cover for stronger soundproofing.

Since it is a soundproof cover, it is natural that something with a higher soundproofing effect is required. Efforts have been made to make it smaller.

However, even with these measures, it was still possible to attenuate the impact sound generated when printing type on recording paper by impact and other internal noises by only about 10 dB outside the soundproof cover. .

This idea was devised in view of these points,
The purpose is to provide a soundproof cover that dramatically increases the soundproofing effect and is convenient and easy to use.

The details will be explained below based on the illustrated embodiment.

An embodiment of the soundproof cover according to the present invention is shown in FIGS. 1 to 6.

FIG. 1 is a perspective view from the rear of a teleprinter, typewriter, etc., opposite to the operating section side.

The soundproof cover 1 has a box shape with a top surface 2, left and right side walls 3'3', a rear wall 4, and a front wall 5.
It is attached to the top of the machine using a hinge or the like, and can be completely placed over a teleprinter, typewriter, etc. through the opening at the bottom.

The cover main body 8, the side walls 3 and 3', the rear wall 4, and the front wall 5 are lined with sound-absorbing material as much as possible.

The upper surface portion 2 is provided with a front transparent window 9 and a rear transparent window 7.

The front transparent window 9 has two upper and lower transparent plates 10.1 made of synthetic resin.
1 with an elastic member such as rubber so as to leave an air layer in between 12.1
3 and is fixed to the window frame 31 by means such as screwing, and the rear edge is an inclined surface 10' whose position is shifted upward and downward,
It forms 11'.

These inclined surfaces 10' and 11' are the two sides of the rear transparent window 7, which will be described later.
By abutting the two inclined surfaces 24' and 25' and slanting them, the adhesion is improved and internal noise is prevented from leaking, and by shifting the positions of the upper and lower sides, the soundproofing effect is further improved. .

Further, the tip of the lower inclined surface 11' has a knife shape, so that the recording paper 14 can be easily cut as shown in FIG. 3.

The distance from the platen 15 to the tip of the inclined surface 11' is equal to the feeding length required for cutting printed recording paper in a normal teleprinter or typewriter.

In addition, a metal protrusion 1 is provided on the lower surface of the rear end of the lower transparent plate 11.
6 stand vertically downward from the plate surface, and are inserted at equal intervals along the feeding direction of the recording paper 14, and the printed recording paper 14 is electrostatically attracted to the lower surface of the transparent plate 11. It functions as a so-called separator to prevent the recording paper 1 from
4 to the feeding path 32.

A feedout port 17 for the printed recording paper 14 is opened in the rear wall 4, and the recording paper 14, which has been hit-printed by the type wheel 18 and the printing hammer 19 at the platen 15, is transferred to a thin metal guide plate 20. You will be guided and brought out.

This guide plate 20 has both side edges fixed to both side walls 3.3', its rear edge fixed to the lower edge of the outlet 17 of the rear wall 4, and its front edge close to the platen 15.

Similarly to the front transparent window 9, the rear transparent window 7 also has an elastic member 22, 23 such as rubber placed between the window frame 21, and two transparent plates 24, 25 made of synthetic resin, leaving an air space between the plates. It is fixed in this way.

The front edges of the two transparent plates 24 and 25 are provided with inclined surfaces 24' and 25' that correspond correctly to the two transparent plates 10 and 11 of the front transparent window 9 described above. In the closed case, that is, in the state shown in FIGS. 1 and 3, the inclined surface 10
', 24' and 11', 25' are in close contact with each other.

There are also four metal protrusions 26 on the lower surface of the lower transparent plate 25.
They stand vertically downward from the plate surface and are fixed to the depth of the transparent plate 25 at equal intervals along the feeding direction of the recording paper 14 to prevent electrostatic adsorption of the recording paper 14 to the transparent plate 25. It functions as a separator and together with the guide plate 20 forms a feeding path 32 for the recording paper 14.

The height of the feeding path 32, that is, the interval formed by the protrusion 26 and the guide plate 20, allows the recording paper 14 to pass smoothly, but the recording paper 1
The spacing is low enough to easily suppress longitudinal vibration during intermittent feeding of 4, that is, the spacing is narrow.

Further, this feeding path 32 is made as long as the structure allows.

Therefore, the noise leaking through this delivery path 32 is significantly attenuated.

Furthermore, since the recording paper 14 contacts the guide plate 20 over a wide area, vibrations and noise transmitted through the recording paper are also attenuated or suppressed.

Four rollers 29 are attached to the window frame 21 via two sets of support fittings 27 and 28, and are mounted inside the side walls 3, 3' at the back of the slot 6 in FIGS. 1 and 2. They are in contact with guide strips (not shown).

When the handle 30 provided on the upper transparent plate 24 is pulled, the roller 29 rolls on the guide strip and rises diagonally upward, and then moves horizontally to open the rear transparent window 7 as shown in FIG. It is placed above the front transparent window 9.

At this time, the rear edge of the rear transparent window 7 is located in front of the inclined surfaces 10' and 11' of the front edge of the front transparent window 9, and is in a position that does not interfere with cutting of the recording paper 14.

When the handle 30 is pushed rearward, the rear transparent window 7 is moved horizontally and then diagonally downward, contrary to the above, and is closed.

At this time, transparent plates 10.24 and 11. of both the front and rear transparent windows.
25 is each inclined surface 10'.

24', and 11' and 25' are brought into close contact and abutment.

FIG. 7 shows another embodiment of the present invention in which the rear transparent window 7 is opened and closed to the left using a hinge, but it can also be opened and closed in the desired direction by changing the mounting position of the hinge. be able to.

As explained above, according to the soundproof cover according to the present invention, the transparent window has a double structure consisting of two upper and lower transparent plates facing each other with an air layer in between, and the corresponding edges of both the front and rear transparent windows are The slanted surface allows for close contact and abutment, and the upper and lower transparent plates are arranged at different positions.In addition, the feeding path of the recording paper is as long as possible due to the structure of a teleprinter, typewriter, etc., and the recording paper is 1 yen. Because they are formed at such narrow intervals that they can be passed through smoothly, their soundproofing effect is remarkable (experiments have confirmed that the noise attenuation, which was previously around 10 dB at most, has been improved to as much as 20 dB). It is something.

In addition, in the soundproof cover according to the present invention, the transparent window 7 can be freely separated into the front and back, and the corresponding edges of both transparent windows provided at an appropriate distance from the platen are knife edges. After proper feeding, the recording paper can be cut freely,
In addition, the metal protrusions attached to the bottom of both transparent windows allow the recording paper to be guided stably and reliably fed out without being attracted to the transparent plate due to static electricity, making it extremely convenient in terms of use. Moreover, it is easy to use and has an effect.

[Brief explanation of the drawing]

Figure 1 is a perspective view from the rear of the soundproof cover according to the present invention;
FIG. 2 is a partial sectional view taken along the line II--II of FIG. 1, and FIG. 3 is a perspective view showing the rear transparent window in a state where it is pulled toward the front and opened. FIGS. 4 and 5 are explanatory diagrams showing details of the rear transparent window, and FIG. 6 is an explanatory diagram showing details of the front transparent window. FIG. 7 is a perspective view from the rear of another embodiment of the soundproof cover according to the present invention. 1...Soundproof cover, 2...Top part, 7
......Rear side transparent window, 9......Front side transparent window,
10,11.24.25...Transparent plate, 10',
11', 24', 25'... Inclined surface, 14...
... Recording paper, 16°26 ... Protrusion, 20.
...Guidance board, 32...Feeding route.

Claims (1)

[Scope of Claim for Utility Model Registration] In a soundproof cover for use over a teleprinter, typewriter, etc., which is equipped with a transparent window on the top surface for viewing the printing status of recording paper, the transparent windows are placed facing each other with an air space in between. It is formed by two transparent windows, front and rear, which are freely separable, and each of the upper and lower transparent plates has a sloped surface with a knife for cutting recording paper at the corresponding edges of both transparent windows. The transparent windows are provided at different positions, and a plurality of metal protrusions are attached to the lower surface of each transparent window along the direction in which the recording paper is fed out, and the recording paper can smoothly pass through the protrusions further below the protrusions. A guide plate is provided with as narrow an interval as possible, and a recording paper feeding path is formed between the protrusion and the guide plate as long as possible due to the structure of the teleprinter, typewriter, etc. soundproof cover