JPH03155198A - Shelf structure - Google Patents

Abstract

PURPOSE:To enable a printed-circuit board of small size other than a standard size to be stored easily and to prevent damage when a trouble occurs greatly by providing an auxiliary rail plate which divides a space between upper and lower rail plates to an auxiliary frame body which can be inserted into the inside of a shelf along a rail. CONSTITUTION:An auxiliary frame body 13 which can be stored by inserting from the front is provided at an internal space S of a main frame body 10. In this auxiliary frame body 13, as an example three parallel horizontal auxiliary rail plates 15, 16, and 17 are fixed between a pair of side plates 14 which are installed at a gap which is narrower than the width of the main frame body 10. The auxiliary rail plates 15, 16, and 17 are mounted to a position which equally divides the side plate 14 into four areas and are provided with mutually corresponding auxiliary rails 18. Namely, when this auxiliary frame body 13 is inserted into the main frame body 10, four spaces which are equally divided into four areas in the direction of height are formed between the rail plate 15 of the main frame body 10 and the auxiliary rail plates 15-17. With this structure, it is possible to store a printed-circuit board 2' which is 1/4 as high as a standard size printed-circuit board 2 in addition to the latter.

Description

[Detailed Description of the Invention] [Summary] Regarding the structure of a shelf for storing a large number of printed circuit boards mounted with electronic components in parallel in telephone exchanges, etc., the present invention utilizes the conventional basic shelf structure as is. , the purpose of this is to provide a shelf structure that can easily accommodate small-sized non-standard printed circuit boards, and standard-sized printed circuit boards are placed along the rails in the space between the upper and lower rail plates equipped with a large number of rails. A shell structure consisting of a main frame having a height dimension that can be stored in parallel vertically, and an auxiliary frame that can be inserted into the interior of the shelf along the rail, the auxiliary frame having the space. The configuration is such that an auxiliary rail plate is provided to horizontally divide the area.

[Industrial application field]

The present invention relates to the structure of a shelf for storing a large number of printed circuit boards mounted with electronic components in parallel in a telephone exchange or the like.

[Conventional technology]

As shown in FIG. 4, the shelf has a backboard 4 attached to the back of a frame 3 made to match the height h of the printed circuit boards 2 housed therein, and the upper or lower edge of the printed circuit boards 2. It is constructed by fixing a rail plate 5 having a large number of parallel guide rails to its upper and lower surfaces. The printed circuit board 2 is inserted along the rail from the open front side of the shelf and connected to a connector (not shown) provided on the backboard 4.

The length of the printed circuit board 2, that is, the dimension d in the depth direction, needs to be constant because it is connected to the connector on the backboard 4. Furthermore, from the relationship with the upper and lower rail plates 5,
The height h of the printed circuit board 2 must be constant, and as a result the printed circuit boards accommodated in this type of shelf must be of standard size with dimensions dXh.

[Problem to be solved by the invention]

For this reason, in the past, standard-sized printed circuit boards were used, leaving wasted space, even when the number of mounted components was small and a large space was not required.However, recent electronic devices are becoming increasingly denser. This kind of wasteful use of space cannot be tolerated. In order to avoid such waste, a plurality of electronic circuits that should originally be assembled on a separate printed circuit board are sometimes mounted on the printed circuit board in order to make effective use of space. In this case, if a failure occurs in one circuit, it is necessary to bring down the other normal circuit in order to replace the non-defective printed circuit board, which is a drawback that is difficult to accept, especially in equipment that has a large social impact such as telephone exchanges. It becomes.

Of course, it is possible to specially design the frame body and upper and lower rail plates for small sizes other than the standard size, but this is not preferable because it lacks versatility, increases the number of types, and increases manufacturing costs.

The present invention solves the problems of the prior art and provides a shelf structure that can easily accommodate small-sized non-standard printed circuit boards by using the conventional basic shelf structure as is. purpose.

[Means to solve the problem]

The purpose of this is to provide a main frame body having a height dimension that can accommodate standard-sized printed circuit boards vertically in parallel along the rails in a space between upper and lower rail plates each having a large number of rails; A shell structure comprising an auxiliary frame body that can be inserted into the interior of the shelf along the line, and the auxiliary frame body is provided with an auxiliary rail plate that horizontally divides the space. Achieved through structure.

[For production]

According to this shelf structure, standard-sized printed circuit boards are usually inserted and accommodated along the rail plate of the main frame.
If necessary, insert an auxiliary frame body in parallel with these printed circuit boards, and install a back frame with a height suitable for this in the internal space of the shelf, which is horizontally partitioned by the auxiliary rail board provided on this frame. Specially sized printed circuit boards with low temperatures can be inserted along the rails provided on these rail plates.

Hereinafter, the present invention will be explained in more detail based on preferred embodiments shown in the drawings.

〔Example〕

FIG. 1 is an exploded perspective view schematically showing a shelf structure according to the present invention.

The main frame 10 has substantially the same configuration as the above-mentioned conventional shelf structure shown in FIG. A rail plate 5 comprising a backboard 4 and a number of parallel rails 11 is fixed to its upper and lower surfaces.

A feature of the present invention is that an auxiliary frame 13 is provided in the internal space S of the main frame 10, which can be inserted from the front and accommodated in the same way as the standard-sized printed circuit board 2. This auxiliary frame body 13 is arranged between a pair of side plates 140 installed at an appropriate width interval narrower than the width of the main frame body 10, and in the example shown in FIG. .17 is fixed.

The side plate 14 has the same height h as the standard size printed circuit board 2, and can be inserted into the internal space S by engaging with the rail 11 of the rail plate 5 of the main frame body 10.

The auxiliary rail plates 15, 16, and 17 are attached to positions that divide the side plate 14 into four equal parts, as shown in FIG. 2, and each has a plurality of auxiliary rails 18 corresponding to each other. That is, when this auxiliary frame 13 is inserted into the main frame 10, there are four spaces S divided into four in the height direction between the rail plate 5° of the main frame 10 and the auxiliary rail plates 15 to 17. It is formed.

It will be clear from FIGS. 1 and 2 that a printed circuit board 2' having a corresponding quarter height can be inserted into this space S along the rails 11.18. That is,
In this shelf structure, in addition to the standard size printed circuit board 2, it is possible to accommodate a printed circuit board 2' whose height is 1/4 of the standard size.

FIG. 3 shows an auxiliary frame 13° according to a second embodiment of the present invention. In this case, the intermediate auxiliary rail plate 16 is divided in the middle and is defined only by the upper and lower auxiliary rail plates 15 and 17. A space r is provided. This makes it possible to accommodate a printed circuit board that is half the height of the standard size.

In addition, in the above example, three auxiliary rail plates are provided at equally divided positions, but the number and position of the plates are not limited to this and can be arbitrarily selected. However, from the point of view of using the current standard size printed circuit board, the method of dividing into equal parts is economical and waste-free, and is most preferable.

In addition, it is preferable to make the cutting allowance when cutting a standard size printed circuit board into the special size mentioned above to match the thickness of the auxiliary rail plate, as this will simplify the manufacturing process of the special size printed circuit board. .

〔Effect of the invention〕

As described in detail above, according to the present invention, small-sized printed circuit boards other than standard-sized printed circuit boards can be simultaneously mounted on the same shelf. As a result, the unmounted area of the printed circuit board can be reduced, and a one-line-one printed circuit board system can be adopted in a switchboard, etc., and damage when a failure occurs can be minimized. In addition, the shelf structure of the present invention is extremely economical because basically conventional shelves and printed circuit boards can be used as they are.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of one embodiment schematically showing the shelf structure of the present invention, Fig. 2 is a side sectional view of the auxiliary frame portion of the shelf shown in Fig. 1, and Fig. 3 is a similar A perspective view of the auxiliary frame body of the embodiment. FIG. 4 is an exploded perspective view schematically showing a conventional shelf structure. 2 printed circuit board, 4 backboard, 5 rail board, 11 rail, 10 main frame, 13.13° auxiliary frame, 14 side plate, 15-17 auxiliary rail board, 18 auxiliary rail.

Claims (1)

[Claims] 1. Upper and lower rail plates (5) with multiple rails (11)
), the main frame body (10) has a height dimension capable of accommodating standard size printed circuit boards (2) vertically in parallel along the rail (11), and the rail (1
Auxiliary frame (1) that can be inserted inside the shelf along
3, 13'), and the auxiliary frame body (13, 13') is provided with auxiliary rail plates (15, 16, 17) that horizontally divide the space (S). A shelf structure characterized by a