JPS60106198A - Housing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a printing device mounted inside a housing, and particularly has soundproofing properties, internal cooling properties, and maintainability. The present invention relates to a method of configuring a Layaratomo housing for each component mounted within the housing.

<Prior art and background> Conventionally, printing devices such as line printers have been used to combine electrical and mechanical elements, and have been used to produce linear magnets, paper feed drive motors, typeface rotor drive motors, rectification, and stability. circuit, magnet drive circuit 9 Paper feed motor drive circuit, drive circuit for various control magnets.

While considering the power system circuits such as the ribbon motor drive circuit 2, internal heat generation amount, and the upper limit of allowable temperature, forced air cooling fans are provided in necessary parts to cool them, and air that has risen in temperature inside the housing is pumped out of the housing. Forced ventilation has been achieved by providing exhaust holes in the housing to exhaust air and intake holes to take in fresh air, and in some cases, providing fans at these intake or exhaust holes.

In addition, since these printing devices print by striking moving type with paper intervening by a printing hammer driven by a magnet, impact noise is generated during printing, so such a housing also serves as a soundproof cover.

Although it is relatively easy to obtain an attenuation rate of about 30 db depending on the thickness and material of the housing, if there are any openings or gaps, the noise inside will leak out, so cover it with a housing. In an effort to reduce the noise emitted to the outside, for example, if the entrance for unprinted paper or the outlet for printed paper is left open, if you try to reduce the noise by more than 10 to 15 dB, it is necessary to install sound-absorbing material inside the housing. It is not very easy to paste a large number of materials, and even if you use porous foam rubber, which is normally used as a sound absorbing material, asphalt cardboard, which also serves as a vibration damping material, or rubber plates for vibration isolation, the heat conductivity is extremely low. Since this is not a good idea, the intention was to dissipate the heat generated from inside the case through the walls of the case, and by adding an opening/closing door to the case and sealing it except when replacing the paper, the opening on the paper entrance side could be closed. It is known that it is quite effective as a soundproofing measure to form a stack chamber on the paper ejection port side, which is surrounded and sealed, and has a door that opens and closes only when paper is taken out, thereby blocking the opening. However, when such a configuration is adopted, the stack chamber is placed on the rear side, which is usually the maintenance side of the device, and the stack chamber or stacker must be configured so that it can be opened for maintenance. jIf you remove it, you will have trouble storing it, and if you try to open or close it, it will be quite large (it is heavy, so if you fix it with a hinge, the hinge and structure must be quite strong to prevent it from twisting).

However, although this configuration can be expected to be quite effective as a soundproofing measure, if you want to extract the heat inside the device case to the outside, you will need a fan, an air intake and an air outlet, and no sound can be heard from these openings. leaks, and when the external noise level goes above the level where sound insulation measures are taken, the wind noise from the fan itself cannot be ignored.
A proper countermeasure would be to install a muffler between the fan and the outside, but installing a special muffler requires a certain amount of space due to the structure of the housing, which is not very desirable. In addition, although ventilation is possible with a configuration in which fans are provided at the intake and exhaust holes, it is difficult to blow air at a high velocity to specific heat generating parts, and cooling (heat exchange) of specific parts is difficult.
In order to increase the efficiency of the system, fans are required in specific internal parts, but it is not very desirable to have many small fans, both in terms of cost performance and conversion efficiency.

Also, noise is mainly generated in the printing section within the device, but from the perspective of radiation, the vibrations of the paper are quite efficiently converted into sound and radiated, so the part where the mechanical part of the housing is mounted and the paper It is undesirable from the soundproofing point of view to open an opening in a part that is still vibrating.

Purpose and Features> In view of the above-mentioned background, the present invention has been developed to combine various parts mounted inside a housing into an electrical circuit part with a heat source but no noise source, a mechanical part with a heat source and a noise source, and a stack part with a noise radiation source. Thinking separately, from the electrical circuit section to the mechanical section.

By providing a through-flow passage that communicates with the stack part, narrowing down the communication passage between the electrical circuit part and the mechanical part, and installing a fan in this part, cross-flow air is generated, and the main heat source is generated along the outlet position of this ventilation passage. To provide a layout within a housing that takes into account both sound and cooling, in which a magnet drive circuit, a printing magnet, etc. are arranged, and the whole is cooled, and it also serves as an intake opening and an exhaust opening. In order to achieve the above-mentioned object, the present invention has a main casing with an open back and partitioned into two chambers, and a sub-casing attached to the back of the main casing. By recessing the inside of the rear facing wall of the sub-casing to the main casing at the boundary between the two chambers to form a communication passage between the two chambers, and by providing a fan on the sub-casing side in such a way as to squeeze out the communication passage. Furthermore, an intake hole may be provided in the first chamber of the two chambers, an opening may be provided in the sub-casing to communicate with the second chamber, and an exhaust hole may be formed in the sub-casing, and the communication path may be used to communicate with the second chamber. In addition, equipment that generates heat must be installed in the first and second rooms, which are
The equipment installed in the room may be the sound source, the fan must be a cross-flow fan, and there is a soundproof duct in the part of the first room air intake hole and the sub-casing exhaust hole that connect to the outside air opening. Furthermore, the equipment mounted in the second chamber is a printing device, and the back surface of the communication path formed by recessing is used as a paper guide for printed paper.

<Example> FIGS. 1 and 2 are explanatory diagrams of an embodiment of the present invention.

In the figure, A is the main housing, B is the secondary housing, the suffixes are each room of each housing, A1 is the unprinted paper stack section, A2 is the electric circuit mounting section, A3 is the mechanical mounting section, A4 and A5 are the air intake. The duct portion B1 is a stack portion, B2 and 83B4 are rooms inside the housing prepared as exhaust duct portions, and the rooms A4, B5, B2, B3, and B4 have openings that communicate with the outside.

A4 and A5 communicate with A2, and A2 and A3 communicate with each other via the cross-flow fan l in the recess 2 of the opposing wall on the side of the sub-casing that accommodates the cross-flow fan l.
3 and B1 communicate with each other above the recessed portion 2 and also serve as a discharge port for the paper 15. Also rooms B1 and 82B3 or B
4 is connected via air or sound in a looped manner. Therefore, when the cross-flow fan 1 is rotated in this configuration, it is possible to install the cross-flow fan in such a way that it squeezes the center of the through-flow passage from the intake hole 3.3' to the exhaust hole 4.4'5 in A4 or A5. Ventilation is possible with a single fan using negative pressure on the one hand and positive pressure on the other hand, and the flow velocity can be increased by narrowing the cross section of the flow path near the fan, and furthermore, the highest speed airflow can be obtained immediately after the fan. By paying attention to this and mounting a heat-generating member in such a flow passage, it is possible to use only one fan for both air cooling (heat exchange) and ventilation of the heat-generating member.

From the perspective of heat-generating components, almost all of the rooms are between rooms A2 and A3, and room A2 is equipped with a power supply unit 1-6 control circuit that has heat sources such as power transformer rectifier circuit stabilization circuits. Printed board unit 7
etc. are installed, and in room A3, a printing magnet 9 and a magneto dryer 10, which are the main heat generation sources in the mechanical section 8 of the printing device, are installed near the air outlet of the cross flow fan 1, and another heat generation source is installed. The belt drive motor 11 uses the outside of the paper path to perform air cooling by branched flow.The belt drive motor 11 itself is air-cooled by attaching blades to the belt drive motor 11, which uses the outside of the paper path to cool the air. are collectively discharged together with the paper 13 into the room B1 via the communication opening 12 with the room B1 which also serves as a paper discharge port, and are turned back into the rooms B2, B3 . It is discharged to the outside via B4.

Furthermore, although the printing device mechanism section 8 is an assembly with a width that is larger on the outside than the maximum storage paper width, it is normal to leave some clearance between it and the casing, so it is easy to separate the outside and inside of the mechanism section. The wind can be partitioned and controlled, and the upper part of the side where the printing magnet and paper feed are located, which is the path for ejecting the printed paper, can be partitioned off as a paper guide, at least the middle part of the paper guide. It forms a passage for connecting the printing magnet and the magnet chambers A2 and A3, and the upper part faces the paper guide of the mechanism section to form a paper guide on the stack section side.

The reason why such a configuration can be easily achieved is that the airflow direction changes by nearly 90 degrees between the intake and exhaust sides of the cross 1 flow fan, and the printing device is long in the printing digit direction, but compact on the orthogonal cross section side. In this respect, it is well suited to be placed on the back side of such a paper guide and sucked in from the same direction and discharged in the same direction.The airflow is also used to cool the printing magnet, which is spread out over a width of nearly 14 inches, from the back side. However, the wide rectangular airflow is easy to use. It is also easy to partition the through-flow path to block it. On the other hand, when reviewing the configuration for soundproofing, we found that most of the sound sources are from the mechanical part of the printing device installed in room A3, and the sound and vibrations generated by printing are emitted by the mechanical part and paper. paper and cross flow fan to some extent,
On the intake side, room A2 doubles as a duct for soundproofing, and room A
4 and A5 are prepared as soundproof ducts, and on the exhaust side, room B1, where pre-printed paper is stacked, also serves as a soundproof duct, and rooms B2B3B4 are folded over and prepared as soundproof ducts. This is because the path from the opening to each opening can be extremely long.

Even without using much sound-absorbing material, the sound pressure level at the opening can be attenuated to a satisfactory level that allows implementation of a noise level of 55 db at a distance of 1 m from the hour wheel.

As for the mounting case, in addition to this, the upper part of the main case and the back of the sub-case are configured as a door or an opening/closing cover for handling paper, and the electrical circuit (power supply unit) installed in room A2. In order to maintain the mechanical parts mounted on A3 (printed boards, etc.), the main casing A and sub casing B are constructed so that they can be opened and closed, but when the auxiliary casing is opened, the fan is also on the side of the auxiliary casing. Therefore, it is possible to secure a maintenance surface for backside maintenance in printing devices, etc. that have a heating element on the backside and want to be air-cooled from the backside.

Effect〉 By mounting a heat-generating member along such a through-flow passage and installing a cross-flow fan in the middle of the through-flow passage, ventilation and blowing can serve as air cooling, and the above-mentioned through-flow The ventilation path can also serve as a duct for attenuating leakage sound, and unnecessary space can be effectively used as a layout for soundproofing, cooling, and maintenance, so there is no need to increase the volume of the case, and there is no need to use too much sound-absorbing material. It is possible to realize a layout within the housing of the printing device that does not need to be used and is extremely cost-effective.

[Brief explanation of the drawing]

FIG. 1, FIG. 2, and FIG. 3 are explanatory diagrams of one embodiment of the present invention. In the figure, A is the main housing, B is the secondary housing, A3 and A2 are the upper and lower chambers on the main housing side, BL is the chamber on the secondary housing side, A4A3 is a room with intake and exhaust openings, and AI is the unprinted paper stack chamber. B2.
B3. B4 indicates a room having intake and exhaust openings on the side of the sub-casing. Also, 1 is a cross flow fan, 2 is a recessed part, 3°3',
4.4', 5. are the intake and exhaust holes, 6 is the power supply unit, 7 is the intake and exhaust hole, respectively.
Reference numeral 1-18 is a mechanical unit of the printing device, 9 is a printing magnet, 10 is a magnet driver, and 11 is a belt drive motor.

Claims (1)

[Scope of Claims] (11 A main casing having an open back and partitioned into two chambers, and a sub-casing attached to the back of the main casing, the sub-casing having a rear surface facing the main casing. 2 above by recessing the opposing wall at the boundary between the two rooms above.
A housing device characterized in that a fan is provided on a sub-casing side to form a communication path between the chambers and to block the communication path. (2) An intake hole is provided in the first of the two chambers, and the sub-casing ε
The casing device according to claim 1, wherein the opening is provided to communicate with the second chamber, and an exhaust hole is formed in the sub-casing. (3) The casing according to claim 11 or (2), characterized in that equipment that generates heat is mounted in the first and second chambers connected by the communication path. (4) The housing device according to claim (3), characterized in that the equipment installed in the second chamber is a sound source. (5) The device is characterized in that the fan is a cross-flow fan. The casing device according to claim 1, 2, 3, or 4. (6) The intake hole of the first chamber and the sub-casing. The housing device according to claim (2), characterized in that a soundproof duct is formed in a portion of the exhaust hole that connects to the outside air opening. (7) The housing device is mounted in the second chamber. The equipment is a printing device,
Claim No. 4, characterized in that the back surface of the communicating path formed by recessing forms a paper guide for already printed paper.
or (6) or (6).