JPH0638467Y2 - Unit fixed structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a fixing structure of an electronic circuit unit in a device rack on which the electronic circuit unit is mounted.

(Prior Art) Conventionally, as a technology in such a field, there is one as shown in FIG. The figure is a perspective view from the back of the device rack.
As shown in the figure, one or a plurality of electronic circuit units 3 are mounted on the device rack 1 and the unit mounting shelves 2 constituting the device rack 1, and through the screw holes 4 provided on the unit mounting rack 2 from the rear surface of the device rack 1. The unit fixing screw 5 is screwed into a screw hole (not shown) provided on the electronic circuit unit 3 to fix the electronic circuit unit 3, and then a screw hole (not shown) provided on the front surface of the electronic circuit unit 3. Unit fixing screw 6
The electronic circuit unit 3 was fixed to the unit mounting shelf 2.

(Problems to be solved by the invention) However, in the above structure, the dimensions of the screw holes provided in the electronic circuit unit 3 and the screw holes 4 (a plurality of holes including the front face) provided in the unit mounting shelf 2 Precision and unit 3
It was difficult to secure dimensional accuracy in the front and rear, and there was a problem that screw tightening work was required on the back side. Therefore, the present invention eliminates the above-described difficulty in securing dimensional accuracy when fixing the back side of the electronic circuit unit and the necessity of fixing work on the back side, and inserts the electronic circuit unit into the unit mounting shelf from the front of the device rack. This provides a fixing structure in which fixing on the back side is completed and fixing work of the electronic circuit unit can be completed by fixing screws on the front side.

(Means for Solving the Problems) The present invention is, in a device rack for mounting a plurality of electronic circuit units, provided on a notch portion provided on the back surface of the unit mounting shelf and on a lower side surface protruding to the rear surface of the electronic circuit unit. By engaging the notches with the electronic circuit unit when it is inserted, the vertical and horizontal movements of the electronic circuit unit can be fixed on the back side, and the front side of the electronic circuit unit and the unit mounting shelf can be screwed or the like. The electronic circuit unit is fixed so that the electronic circuit unit moves in the front-rear direction, and the small movements in the vertical and horizontal directions of the front surface that occur after the back surface is fixed are fixed.

(Operation) By doing so, the electronic circuit unit can be fixed only by the work from the front side, and finally all the movements of the electronic circuit unit in the vertical, horizontal, and front-back directions can be fixed. Can be removed.

(Embodiment) FIG. 1 is a perspective view showing a first embodiment of the fixing structure of the present invention. In the figure, 1 is a device rack, 2 is a unit mounting shelf,
An electronic circuit unit 3 has a notch 7 provided in a unit retainer 2a provided on the upper portion of the unit mounting shelf 2 having a rear-shaped surface. On the other hand, a cutout 3a into which the cutout 7 is fitted is provided in the lower portion of the side surface of the electronic circuit unit 3 with the rear surface thereof protruding. In addition, 6 indicates a unit fixing screw,
The front part of the electronic circuit unit 3 and the unit mounting shelf 2 are fixed to each other.

In such a configuration, in order to mount and fix the electronic circuit unit 3 on the device rack 1, first, the electronic circuit unit 3 is mounted on the unit mounting shelf 2 from the front surface of the device rack 1 and pushed backward. Simultaneously with the completion of pushing, the notch 7 of the unit presser 2a provided on the rear part of the unit mounting shelf 2 and the notch 3a provided on the lower side of the electronic circuit unit 3 protruding from the back surface are fitted to each other, and the electronic circuit for the upper, lower, left and right Restrain the movement of unit 3. Next, by fixing the front side with the screw 6, the movement in the front-back direction is also restrained, and the electronic circuit unit 3 is completely fixed to the unit mounting shelf 2.

FIG. 2 is a detailed view for explaining the fitting portion on the back surface of the electronic circuit unit. That is, a notch 3a substantially equal to the thickness of the unit mounting shelf 2 provided on the lower side surface of the electronic circuit unit 3 protruding on the back surface of the electronic circuit unit 3 and a rear upper portion of the unit mounting shelf 2 (the end of the unit mounting shelf 2) The notch 7 of the unit presser 2a provided in the above is fitted into the notch 7 having substantially the same size as the protruding portion of the electronic circuit unit 3, and the vertical and horizontal movements of the electronic circuit unit 3 are restricted. At this time, tapers 3b and 7a are provided at the fitting introduction portions of 3a and 7 in order to facilitate the pushing device of the electronic circuit unit 3. Further, the shape of the notch 7 and the dimension between the notches 7 may be matched with the outer dimensions of the electronic circuit unit 3, and precise dimensional accuracy is not required. In addition, there is no need to fix screws on the back surface. Furthermore, since the rear portion of the unit mounting shelf 2 is shaped like a letter, the deflection of the unit mounting shelf 2 caused by the weight of the electronic circuit unit 3 is controlled.

FIG. 3 shows a second embodiment of the fixing structure of the present invention, and is a detailed view for explaining the fitting portion on the rear surface of the electronic circuit unit. In the figure, a notch 3a is provided on the back surface of the electronic circuit unit 3.
And a notch 3c having a size different from that of the notch 3a is provided. On the other hand, the unit retainer 2a provided at the upper part of the rear part of the unit mounting shelf 2 corresponds to the notch 3a provided in the electronic circuit unit 3. The cutout 7 is provided, and the cutouts 3a and 7 are engaged with each other to fix the electronic circuit unit 3 vertically and horizontally. At this time, the other notch 3c fits into the unit retainer 2a, and the vertical movement is fixed together with the notch 3a. It should be noted that it is necessary to provide the notch 7 in the unit presser 2a corresponding to the plurality of electronic circuit units 3, how to set the slit width of the notch, and to provide the fitting introduction portion with a taper. The same applies to the examples.

Also in this case, the movement of the electronic circuit unit 3 on the back side in the vertical and horizontal directions is restricted, so that the electronic circuit unit 3
The mounting work is completed by fixing the front surface of the unit to the unit mounting shelf 2 with screws or the like.

In the second embodiment, as compared with the first embodiment, the reference for the alignment of the electronic circuit unit 3 is one place, and the electronic circuit unit 3 is positioned by fitting the notches 3a and 7 together. Since the position of the other notch 3c in the left-right direction of the unit presser 2a is free, the dimensional accuracy is further relaxed. In this case, since the lateral movement of the electronic circuit unit 3 is restricted only by the notch 3a, the electronic circuit unit 3 can be applied to a relatively lightweight electronic circuit unit.

(Effects of the Invention) As described in detail above, according to the present invention, (a) since the back surface of the electronic circuit unit is fixed by fitting with the notch, the dimensional accuracy of the screw position and the screw hole (for fixing It does not require dimensional accuracy of holes) and can be processed according to the unit outline.

(B) Since the fixing on the back side is performed by inserting the electronic circuit unit, the fixing work on the back side is unnecessary, and the mounting work time can be shortened.

(C) All the mounting work can be done on the front side of the equipment rack, which eliminates the need for maintenance space on the back side.

And so on.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the fixing structure of the present invention,
FIG. 2 is a detailed view for explaining the fitting portion on the back surface of the electronic circuit unit, and FIG. 3 is a detailed view for explaining the fitting portion on the back surface of the electronic circuit unit, which also shows the second embodiment of the present invention. FIG. 4 is a perspective view showing a conventional fixing structure of this kind. 1 ... Device rack, 2 ... Unit mounting shelf, 2a ... Unit presser, 3 ... Electronic circuit unit, 3a ... Notch, 7 ...
… Notches. 7a …… Introduction taper, 3b …… Introduction taper, 3c …… Notch.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 999999999 Hitachi, Ltd. 4-6, Kanda Surugadai, Chiyoda-ku, Tokyo (71) Applicant 999999999 Fujitsu Limited 1015, Uedotachu, Nakahara-ku, Kawasaki-shi, Kanagawa Prefecture (72) Device Yuji Emori 1-7-12 Toranomon, Minato-ku, Tokyo Oki Denki Kogyo Co., Ltd. (72) Inventor Akinori Miyake 3-9-11 Midoricho, Musashino-shi, Tokyo Nippon Telegraph and Telephone Public Corporation Musashino Electro-Communications Research Laboratory (72 ) Inventor Hiroshi Ishiyama 5-33-1 Shiba, Minato-ku, Tokyo Inside NEC Corporation (72) Creator Tetsuya Hattori 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi Ltd. Totsuka factory (72) Inventor Hiroshi Terasaki 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Fujitsu Limited (56) References , U)

Claims (1)

[Scope of utility model registration request] 1. In an apparatus rack mounting one or more electronic circuit units, the electronic circuit units and the unit mounting shelves are fixed to the back side by mounting the electronic circuit unit on the lower side surface protruding from the back side. A notch having a width substantially equal to the plate thickness of the rear unit presser of the unit mounting shelf for mounting the circuit unit is provided, while a notch having a width substantially equal to the plate thickness of the electronic circuit unit is also provided to the rear unit presser, By fitting both of them substantially perpendicularly to each other, the up and down and left and right movements of the electronic circuit unit are fixed on the back surface,
Further, the front and rear movements of the electronic circuit unit and the unit mounting shelf are fixed by screws or the like to fix the forward and backward movements.