JPH0719193Y2 - Silence structure of electronic equipment cabinet - Google Patents

Description

[Detailed Description of the Invention] [Outline] Regarding the sound deadening structure of the electronic equipment cabinet that adopts the forced air cooling method, by changing the direction of the noise passing through the ventilation holes to the outside,
For the purpose of providing a sound deadening structure that can prevent reflected noise from the ceiling from being directed to a specific place, in a sound deadening structure in which a sound absorbing material is arranged around the air vent of an electronic equipment cabinet, Between a pair of fixed wall surface elements that are formed by fixed wall surface elements that are separated in parallel and a pair of movable wall surface elements that are separated in parallel so that the pair of movable wall surface elements can incline while maintaining a parallel relationship with each other. The sound-deadening structure is characterized by being arranged in.

[Industrial application field]

The present invention relates to a sound deadening structure for an electronic equipment cabinet that adopts a forced air cooling method.

[Conventional technology]

A forced air cooling system is adopted in a cabinet that houses electronic equipment such as an electronic computer or a communication device in order to suppress a temperature rise due to heat generation of the electronic equipment. Specifically, referring to FIG. 3, a cooling fan 14 is attached to the bottom side and the top side of the electronic device mounting section 12 housed in the cabinet 10, whereby forced ventilation is provided in the cabinet 10. And the electronic components such as the printed circuit board in the electronic device mounting section 12 are cooled. That is, appropriate openings are formed at the bottom of the cabinet 10, and external air is taken into the cabinet 10 through the openings as shown by an arrow A, while a ventilation hole 16 is formed at the top of the cabinet 10. The air in the cabinet 10 is discharged through the ventilation holes 16 as indicated by the arrow B, and the electronic device mounting portion 12 of the cabinet 10 is cooled by the forced ventilation.

By the way, noise is generated from the cooling fan 14 and the like in the cabinet 10, and such noise causes discomfort to workers such as operators. Therefore, conventionally, a sound absorbing material 18 made of sponge-like polyurethane, glass wool, or the like is provided on the top side of the cabinet to prevent or reduce noise.

[Problems to be solved by the device]

The ventilation hole 16 must be formed on the top side of the cabinet 10 as described above, and therefore the ventilation hole 16 is formed by the sound absorbing material 18.
In this case, some of the noise is
As shown by the arrow C in the figure, the air passes through the ventilation hole 16 to the outside. The noise that has passed through the ventilation holes 16 is reflected on the ceiling and propagates around the cabinet 10 as shown in FIG. 5, but if there is an operator seat 20 around the cabinet 10 at this time, the operator will hear the reflected noise. Will be directly received.

Therefore, the object of the present invention is to muffle the electronic equipment cabinet that adopts the forced air cooling method, and changes the direction of the noise passing through the ventilation holes to the outside to direct the reflected noise from the ceiling to a specific place. It is to provide a silencing structure that can be avoided.

[Means for Solving the Problems]

According to the present invention, in a sound deadening structure in which a sound absorbing material is arranged around a ventilation hole of an electronic equipment cabinet, the ventilation hole is provided with a pair of fixed wall surface elements that are spaced in parallel and a pair of movable walls that are spaced in parallel. It is characterized in that it is formed by a wall surface element and is arranged between the pair of fixed wall surface elements so that the pair of movable wall surface elements can be inclined while maintaining a parallel relationship with each other.

[Action]

As is apparent from the above configuration, in the sound deadening structure of the electronic device cabinet according to the present invention, the pair of movable wall surface elements are arranged between the pair of fixed wall surface elements so as to be inclined while maintaining the parallel relationship with each other. Therefore, the direction of noise passing through the ventilation hole to the outside can be changed.

〔Example〕

An embodiment of a sound deadening structure for an electronic equipment cabinet according to the present invention will be described with reference to FIGS. 1A, 1B, 1C and 2 of the accompanying drawings. 1A is a partial vertical cross-sectional view of the sound deadening structure provided on the top of the electronic equipment cabinet, and FIG. 1B is a partial cross-sectional view taken along the line BB of FIG. 1A. FIG. C is a partial perspective view of a mechanism for forming a ventilation hole of the sound deadening structure of FIG. 1A, and FIG. 2 is a schematic view for explaining the function and effect of the sound deadening structure of the electronic equipment cabinet according to the present invention.

Referring to FIGS. 1A and 1C, a rectangular opening 22a is formed in a top wall 22 of an electronic device cabinet,
A pair of fixed wall surface elements 24 (only one of the fixed wall surface elements 24 is shown in FIGS. 1A and 1C) is provided on the top wall 22 along one opposite side edge of the opening 22a. It is installed vertically. A pair of movable wall surface elements 26 is arranged between the pair of fixed wall surface elements 24 along the other opposing edge of the opening 22a. In short, in this embodiment, the pair of fixed wall surface elements 24 and the pair of movable wall surface elements 26 form the ventilation holes 28 along the four sides of the opening 22a of the top wall 22. A suitable sound absorbing material 30 (for example, sponge-like polyurethane, glass wool, etc.) is arranged around the ventilation hole 28 thus formed, and the sound absorbing material 30 is integrated with the pair of fixed wall surface elements 24 on the top cover plate. Covered by 32. Although both end edges of the pair of fixed wall surface elements 24 are not shown, the end surface wall elements close the space between the respective end edges. Further, a rectangular opening 32a is also formed in the top cover plate 32, and one width dimension of this rectangular opening 32a, that is, the width dimension in the direction perpendicular to the pair of fixed wall surface elements 24 is the corresponding width dimension of the opening 22a. However, the other width dimension, that is, the width dimension along the surfaces of the pair of fixed wall elements 24 is larger than the corresponding width dimension of the opening 22a as is apparent from FIG. 1A. To be done.

Each movable wall surface element 26 is composed of two movable wall surface portions 26a and 26b, which are movable with respect to each other. More specifically, the upper and lower side edges of the movable wall surface portion 26a are first along the length direction.
B is bent as shown in FIG. B, and both side edges of the movable wall surface portion 26b are slidably accommodated in the bent portion, so that both portions 26a and 26b are moved to the arrow E (see FIGS. 1A and 1C). )
Can be expanded and contracted along the direction of. Each movable wall element
One movable wall surface portion 26a of 26 is rotatably pivotally attached to the rod 26c at its lower edge, and both ends of the rod 26c are bent and fixed to the top wall 22 as shown in FIG. 1C. .
In short, the movable wall surface portion 26a is surrounded by the arrow F around the rod 26C.
It is rotatable in the directions (FIGS. 1A and 1C). The other movable wall surface portion 26b of each movable wall element 26 is pivotally attached to the rod 26d at its upper edge so that the rod 26d is somewhat shorter than the width between the pair of fixed wall element 24. . As with the movable wall portion 26a, the movable wall portion 2
6b is also rotatable around the rod 26d in the direction of arrow H (Fig. 1C). At both ends of the two rods 26d, FIG.
Two rods 34 (only one of which is shown in FIG. 1A) are arranged parallel to each other, as shown in FIG. 1, and each rod 34 is pivotally attached to its respective end of two rods 26d. Be worn. At least one end of each of the two rods 34 has a rod 36 at right angles to the rods 34 and horizontally.
Both ends of the rod 36 project through the long slots 35 (FIG. 1C) horizontally formed in the pair of fixed wall surface elements 24 and project outward. When the protruding tip portion of the rod 36 is moved along the elongated slot 35 in either direction indicated by an arrow G (FIG. 1A, FIG. 1C), the pair of movable wall surface elements 26 are brought into parallel relationship with each other. While maintaining the rod 26
By rotating around c and 26d, it is possible to take an inclined position, whereby the direction of the ventilation hole 28 can be changed. As shown in FIG. 1C, it is possible to fix a stop plate piece 36a having a set screw insertion hole to the end of the rod 36,
The rod 34 can be fixed at an appropriate position by the stop plate piece 36a. More specifically, along the lower side of the elongated slot 35, a plurality of screw holes are formed in the fixed wall element 24 at appropriate intervals, and the stopper plate piece 36a is fixed to an appropriate one of the screw holes. By fixing with screws,
The rod 34 may be fixed in position and the pair of movable wall surface elements 26 may be held in a predetermined tilted position.

When the movable wall surface element 26 is tilted, the movable wall surface portion 26b is pulled out from the movable wall surface portion 26a, and the length of the movable wall element 26 is increased. When rotated toward the vertical position as shown in A and FIG. 1C, the movable wall portion 26b is retracted into the movable wall portion 26a, reducing the length of the movable wall element 26.

According to the above configuration, by tilting the pair of movable wall surface elements 26 as necessary, the direction of the noise passing through the ventilation holes 28 is changed to direct the reflected noise from the ceiling of the floor to a specific place. It is possible to prevent them from changing. For example, although the same situation is assumed in FIGS. 2 and 5, it is clear from FIG. 2 that by directing the ventilation holes 28 as shown, the reflected noise from the ceiling can be reduced. It is possible to prevent the operator seat 20 from going to the seat.

[Effect of device]

As is clear from the above description, according to the present invention, the direction of the noise passing through the ventilation hole to the outside can be changed, so that the operator or other worker can be freed from the discomfort caused by the noise. It will be possible.

[Brief description of drawings]

1A is a sectional view showing a sound deadening structure of an electronic equipment cabinet according to the present invention, FIG. 1C is a partial perspective view of a mechanism for forming ventilation holes of the sound deadening structure of FIG. 1A, and FIG. 1B is a first view. FIG. 2 is a cross-sectional view taken along line BB of FIG. A, FIG.
FIG. 3 is a schematic cross-sectional view showing a sound deadening structure of a conventional electronic equipment cabinet, FIG. 4 is a partially enlarged cross-sectional view of FIG. 3, and FIG. 5 illustrates problems of the sound deadening structure of a conventional electronic equipment cabinet. It is a schematic diagram. 24 …… Fixed wall element, 26 …… Movable wall element, 26a ・ 26b…
… Movable wall surface, 28 …… Ventilation hole, 30 …… Sound absorbing material.

Claims (1)

[Scope of utility model registration request] 1. A sound deadening structure in which a sound absorbing material (30) is arranged around a ventilation hole (28) of an electronic equipment cabinet, wherein the ventilation hole (28) is a pair of fixed wall surface elements (2) separated in parallel.
4) and a pair of movable wall surface elements (26) spaced apart in parallel, and the pair of fixed wall surface elements (26) can be inclined while maintaining a parallel relationship with each other. (24) Silence structure characterized by being placed between.