JPS5843826Y2 - Frame structure in electrical equipment cases - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a frame structure in a case of electrical equipment such as electronic/communication equipment on which a large number of divided panel units are mounted.

Generally, in electronic and communication-related electrical equipment, the entire system is often constructed by combining panel units that are divided into a large number of blocks for each panel, each of which is a functional unit of the equipment.

When a large number of unit panels are lined up vertically or horizontally and screwed to an equipment case or frame, it is important to provide a large number of screw holes at precise positions at regular intervals on the equipment case side. This is necessary for alignment and installation.

Conventionally, in order to perform accurate drilling as described above, after pre-processing was performed such as marking the center line in a cross shape at each hole location and creating recesses with a punch, the mold was removed. It was customary to make holes with a drill or the like, which had the drawbacks of low work efficiency and high costs.

In view of this, the present invention has been developed to provide mounting holes, such as screw holes for mounting panels, etc., along a single thin groove, thereby efficiently drilling holes at precise locations. The purpose is to provide a frame structure in the case of electrical equipment that can improve the mounting accuracy or assembly accuracy of units, panels, etc., and has multiple mounting holes. Characterized by being located within a common narrow groove.

EMBODIMENT OF THE INVENTION Hereinafter, the structure of this invention will be explained about an Example based on drawing.

Reference numeral 1 denotes an equipment case for electronic/communication equipment, and is configured such that a printed circuit board 2 is provided inside the equipment case.

The front frame (square frame) of the equipment case 1 is
It consists of upper and lower horizontal frames 3, 3 installed in parallel, and left and right vertical frames 4, 4 orthogonal to the horizontal frames 3, 3.

The horizontal frame 3 consists of a fitting recess 5 whose interior (inner bottom) is widened from one end to the other, and an engaging recess 7 having an engaging part 6 on the opening side, and the fitting recess 5 is an engaging recess. 7
The vertical frame 4 has a fitting protrusion 8 that tightly fits into the fitting recess 5 at its upper and lower ends, and a non-opening side of the engaging recess 7. It is formed by an engaging convex portion 9.

The fitting protrusion 8 of the vertical frame 4 is tightly fitted into the fitting recess 5 of the horizontal frame 3, and the engagement protrusion 9 is engaged with the engagement recess 7 to form a fitting part (four corners), A fixing device 10 such as a screw or a rivet is used to fix the engaging recess 7 and the engaging protrusion 9, which constitute a part of the fitting part.
Each is fixed at

In the horizontal frame 3, a plurality of screw holes 12 (mounting holes) for screwing the unit panel 11 are arranged in a straight line in the longitudinal direction at regular intervals.
A single narrow groove 13 (straight and tapered in cross section) is continuously cut out connecting the centers of the grooves.

Further, the width of the narrow groove 13 is smaller than the diameter of the screw hole 12 to prevent the strength from decreasing.

The narrow grooves 13 are formed at the same time when the aluminum frame is extruded.

In this example, the cross-sectional shape of the narrow groove 13 is V-shaped, and to give an example of the dimensions, for a screw hole with a diameter of 3 m, the depth Q is 3 mm (1/10 of the diameter), and the width is Q: A V-shaped groove of 5 mm (1/6 of the diameter) is appropriate.

The screw holes 12 are prepared at one time using a mold, and each screw is individually cut using a tap.

Alternatively, a V-shaped groove may be formed by cutting, and then holes may be made with a drill.

Although this example illustrates the case of a vertically split panel, the present invention can be applied to a horizontally split panel by providing narrow grooves in the vertical frame.

Moreover, it goes without saying that the present invention can be applied to both vertical frames and horizontal frames.

The cross-sectional shape of the narrow groove 13 may be a V-shaped groove, a U-shaped groove, or any other shape as long as it has a tapered shape that accurately guides the drill, but a V-shaped groove is most preferable.

Further, although the mounting hole is a screw hole in this example, it may be a screw hole or other hole.

The distance between the mounting holes is accurately regulated by other means.

The horizontal frames 3, 3 and the vertical frames 4, 4 are each integrally formed of aluminum, for example, by extrusion molding, die casting, etc., and each includes a chassis 14, left and right side plates 15, 15, a guide mounting plate 16, and a top plate. 17 mag is attached.

The upper surface plate 17 is sometimes attached to the upper part of the box-shaped case 1 at the engaging part 6 of the horizontal frame 3, and is located on the head 18 of the fixture 10, It constitutes a loosening means to prevent the looseness remover from falling.

Reference numeral 19 denotes a guide rail to which the printed circuit board 2 is attached, and is arranged in parallel so as to correspond to the chassis 14 and the guide mounting plate 16 provided on the rear side of the vertical frame 4 and horizontal frame 3, respectively.

The guide rail 19 has an engaging recess 26 on its front side, and an engaging bent part 20 is integrally provided at both ends of its back side, and the engaging bent part 20 is connected to the chassis 14 and the guide mounting plate 1.
It is fitted into the mounting hole 21 of No. 6 and locked.

Three mounting holes 22 of the chassis 14 are newly provided at equal intervals in the front-rear direction, and the mounting position of the guide rail 19 can be changed to the front-rear position by commonly using the central mounting hole 22. .

That is, the panel unit can be plugged in from the front or the rear (in this case, the arrangement of the board connectors also changes accordingly).

Further, as shown in FIG. 3, when the unit is inserted into the case 1 along the guide rail 19, the connector insertion part 23 at the rear end of the printed circuit board 2 is combined with the connector 24, and the L-shaped frame is replaced with the rear panel 25. 26 can also be provided and the connector 27 can be provided on the curved frame 26.

The cross-sectional shape of the fitting portion of the horizontal frame 3 may be round or square, and the depth of the engaging recess 7 is equal to the head portion 1 of the fixture 10.
8 is hidden or the head 18 is in contact with the lower surface of the top plate.

The fitting convex part 8 of the vertical frame 4 is slightly tapered to facilitate fitting, but the fitting convex part 5 of the horizontal frame 3 is slightly tapered.
The external dimensions are such that it fits closely.

Moreover, the screw holes of each attachment part are provided by post-processing.

The upper and lower horizontal frames 3, 3, the left and right vertical frames 4, 4, and the left and right side plates 15, 15 share the same parts.

Furthermore, in this example, the horizontal frame 3 is provided with a fitting recess and the vertical frame 4 is provided with a fitting convex portion; Of course, a recess can be provided.

Since the present invention is constructed as described above, when drilling holes, the tip of a tool such as a drill is guided along the sloped wall at the bottom of the narrow groove, and many mounting holes can be drilled without running away or shifting. Since it is easily formed at an accurate center position, it is possible to improve the mounting accuracy or assembly accuracy of units, panels, etc.

Therefore, when unit panels are attached to the frame processed as described above, since the mounting holes of the panels are provided in accurate positions, tilting and uneven spacing between the panels are prevented. Installs neatly in place.

Moreover, the positional relationship between the printed circuit board of the panel unit, the guide rail, and the connector corresponds accurately, so that the unit can be smoothly attached to and removed from the case.

Furthermore, the narrow grooves can be easily obtained by extrusion molding of aluminum or by one-step post-processing such as cutting, and precise drilling operations can be performed efficiently, contributing to cost reduction.

[Brief explanation of the drawing]

The drawings illustrate the embodiment of the present invention, and FIG. 1 is an exploded perspective view of the equipment case, FIG. 2 is a front view of the horizontal frame with some parts omitted, and FIG. 3 is a vertical cross-section of the horizontal frame. 4 is an enlarged view of section A in FIG. 3, and FIG. 5 is a longitudinal sectional view of another modification. 1...Equipment case, 3...Horizontal frame, 4...Vertical frame, 11...Unit panel, 12...Screw hole , 13...
・Narrow groove.

Claims (1)

[Scope of utility model registration request] At least one thin groove with a tapered cross section is continuously provided in the frame portion of the equipment case, and multiple mounting holes such as screw holes and round holes are provided so that the center is located within the thin groove. A frame structure for an electrical equipment case, wherein the width of the narrow groove is smaller than the diameter of the mounting hole.