JPS6317237B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mounting structure for a printed board unit housed in a shelf of a casing structure mounted on a communication equipment rack or the like.

Printed board units and communication equipment racks and the like that accommodate them have been designed to be smaller, simpler, and lighter than ever before, and are required to be easy to operate.

[Conventional technology]

FIG. 1 is a perspective view showing a conventional unit mounting structure, and FIG. 2 is a perspective view showing the printed board unit of FIG. 1. The figure shows a mounting structure in which a rack 2 consisting of a pair of rear pillars stands upright in a manner such that printed board units 1 with a relatively small housing structure are stacked, and the racks 2 can be installed side by side as shown in the figure. It is.

The rack 2 has a shelf-shaped support plate 3 on which the printed board unit 1 is placed, and a connector 4 forming a connection mechanism with the printed board unit 1 is provided on the back side. Further, a surface plate 5 is attached to the printed board unit 1 with screws 5a, and serves as dustproof. The printed board unit 1 is then connected to the rack 2 with a connector and locked.

A plurality of printed boards 6 forming a unit line are inserted and housed horizontally in the printed board unit 1 to form a line function. The printed board 6 is housed in a plug-in connection as shown in FIG. 2 by fitting the connector 8 provided on the rear back panel 7 of the printed board unit 1 to the connector 6a provided on the printed board 6.

Connection with the inside of the rack 2 is achieved by coupling the connector 9 provided on the back panel 7 of the printed board unit 1 with the rear connector 4 of the rack 2. In addition, as a countermeasure against radiation convection of each printed board unit 1, a large number of oval ventilation holes 10 are provided on both sides of the wall surface.

[Problem that the invention seeks to solve]

The conventional frame structure described above has poor earthquake resistance because its strength depends on the pair of pillars on the back, and has a large number of parts as a whole. Furthermore, since the support plate and the printed board are horizontal surfaces, the upward heat dissipation effect is not good, and the effect is further reduced by arranging them side by side.
Wiring for forming circuits between printed boards, especially connecting wiring to a common printed board, is done on the back panel, so the wiring between connectors becomes congested, making it difficult to manufacture,
Makes expansion, maintenance, etc. difficult. The high wiring density of the back panel requires the back panel to be multi-layered, which has the disadvantage of increasing costs.

In view of the above-mentioned conventional problems, the present invention aims to provide a unit mounting structure that is excellent in mounting performance, manufacturability, and practicality.

[Means for solving problems]

In order to achieve the above object, the present invention comprises an upright frame to which shelfs having a box-shaped housing structure are attached in vertical columns to the front surface of the frame columns, and printed board units inserted into the shelves. The printed board unit is attached to a steel plate panel that is removably inserted in parallel in multiple rows of guide grooves provided on two opposing upper and lower sides of the shelf, and is fixed to the back side in parallel with the steel plate panel, and is fixed to the back side in parallel with the steel plate panel. A common circuit printed board equipped with a connecting connector and a guide rail are provided on the front side to allow multiple printed boards to be inserted and removed from the front side in parallel with the steel plate panel, and the above steel plate panel is inserted into the shelf. By inserting a plurality of printed boards into the guide rail from the front, the connectors of the printed boards can be plug-in connected to the connectors of the common circuit printed board, respectively.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 3 shows an overall perspective view of a unit structure according to an embodiment of the present invention. In the figure, on the front side of a pair of upright rear frame columns similar to those shown in FIG. Multiple rows of guide grooves 12a are provided on the upper and lower two opposing sides of the (in the figure, three side shelves are provided on one rack).
A plurality of printed board units 11 (in the figure, three printed board units per shelf) are inserted and removably inserted in parallel.

The printed board unit 11 has a pair of guide grooves 12a.
The substrate is a rectangular steel plate panel 13 with dimensions that can be inserted and removed from the panel, and on the back side of the panel, a rectangular common circuit printed board (indicated by diagonal lines) 17 that is vertically long and parallel to the steel plate panel 13 is installed at a predetermined interval. It is fixed at 13. A connector 17 for plug-in connection with the rack 12 is provided at the rear end of the common circuit printed board 17.
Three connectors 17b for connecting printed boards are provided in the vertical direction at the front end.

In the space on the front side of the steel plate panel 13, a plurality of horizontally parallel guide rails 14 are attached to the connectors 17b in pairs in the vertical direction by screwing, welding, caulking, or the like.

With the above configuration, by inserting the printed board unit 11 along the guide groove 12a through the front opening of the shelf attached to the rack 12, the connector inside the rack 12 (not shown) and the printed board unit 11 can be inserted.
A plug-in connection is made between the connector 17a and the connector 17a. In this state, the printed board unit 11 is in a shape that corresponds to the opening surface of the shelf and supports insertion of the printed board 16.

By inserting the printed board 16 into the groove of the guide rail 14, the connector at the tip is plug-in connected to the common circuit printed board 17b. In this way, the three printed boards 16 can be independently attached to and removed from the printed board unit 11, and are in parallel with the steel plate panel 13. Then, a surface plate is attached to the surface of each shelf unit using screws or the like, covering the surface of each shelf unit.

The printed board 16 constitutes a conventional unit line, and the printed board unit 11 similarly constitutes a line function. In this way, each printed board 17 includes a common circuit section and serves as a pack panel.
It has a connection function between

In addition, the shelves with a box-shaped housing structure arranged in vertical rows on the front surface of the rack 12 have a vertically long box-shaped housing structure that is sufficiently longer than conventional ones, and are attached to the rack 12. Reinforce the frame 12 from above. In this case, the shelves are also connected and fixed to each other by means not shown, such as connecting plates and screws. When the racks 12 are arranged side by side, the reinforcing effect can be further increased by connecting the racks and adjacent shelves in the same manner.

The unit shelf is also defined by the guide groove 12a by inserting a plurality of steel plate panels 13 and partitions the inside, resulting in a reinforced structure, and the steel plate panels 13 are fixed above and below the shelf to prevent it from coming off. This reinforcing effect becomes even greater.

Since it is possible to accommodate several units of the conventional unit as one printed board unit in one shelf with the same rack width as the conventional one, it is possible to accommodate, for example, the number 3 in Fig. 1 compared to the conventional configuration. The number of other parts can be greatly reduced as the support plate shown is no longer necessary and the number of unit casings and surface plates are reduced to one instead of a plurality. Therefore, the conventional space can be used effectively, and higher density packaging and a larger number of printed boards and printed board units can be mounted.

The printed board unit uses a steel plate panel as the substrate to increase the overall mechanical strength, and provides extremely good electromagnetic shielding by providing a common circuit printed board and a printed board for each line on parallel surfaces. This eliminates mutual electromagnetic interference between adjacent printed board units because the space between them is electromagnetically shielded by the steel plate panel.

The steel plate panel 13 and the common circuit printed board 17 are fixed with a gap between them, resulting in a multi-layer panel structure, which complements each other's strength and has high rigidity, improving the bending strength of the steel plate panel and improving electrical and mechanical strength. Overall high reliability can be obtained.

The printed circuit board 16 forming the line unit can be inserted and removed directly from the opening surface of the shelf, making expansion easy.
It is easy to attach and detach for maintenance inspections, etc., and can also be compatible.

Regarding heat dissipation, since the printed board units 11 are arranged in parallel within the shelf with their faces vertical, air for cooling can smoothly convect.In particular, the back panel does not cover the entire back surface of the shelf, but has a sufficiently open back surface. Because of this, an exhaust path is secured to the rear part of the rack. By providing ventilation holes on the upper and lower surfaces of the shelf and openings in the front plate (none of which are shown), ventilation becomes smooth, and together with the chimney effect, a significant improvement over the conventional structure is achieved.

〔Effect of the invention〕

As explained above, the present invention has a structure in which a shelf is attached to the front surface of an upright frame column, and a printed board unit is inserted into the shelf, and the printed board unit is made of steel plate. By fixing a common circuit printed board to the panel and removably accommodating multiple printed boards constituting a unit circuit to form a circuit configuration, we are able to reduce the number of parts and machine The practical effects are significant, with improvements in physical strength, electrical shielding, cooling performance, expansion, and ease of maintenance and inspection.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional unit mounting structure, FIG. 2 is a perspective view of the printed board unit of FIG. 1, and FIG. 3 is a perspective view of an embodiment of the unit mounting structure of the present invention. In the figure, 1 and 11 are printed board units;
2 and 12 are racks, 3 is a support plate, 4, 6a, 8, 9,
17a, 17b are connectors, 5 is a surface plate, 5a is a mounting screw, 6, 16, 17 is a printed board, 7 is a back panel, 10 is a heat radiation hole, 12a is a guide groove, 1
3 is a steel plate panel, and 14 is a guide rail.

Claims (1)

[Scope of Claims] 1. Consists of an upright frame to which shelfs having a box-shaped housing structure are attached in vertical columns to the front of the frame column, and a printed board unit inserted into the shelf, the printed board unit being A steel plate panel is removably inserted in parallel to a plurality of rows of guide grooves provided on two opposing upper and lower sides of the shelf, and a front and rear connecting connector is fixed to the back side in parallel with the steel plate panel. A guide rail is provided on the common circuit printed board and the front side thereof so that a plurality of printed boards can be inserted and removed from the front in parallel with the steel plate panel, and the plurality of printed boards are inserted with the steel plate panel inserted into the shelf. A unit mounting structure characterized in that the connectors of the printed board are plug-in connected to the connectors of the common circuit printed board by inserting them into the guide rail from the front.