JP2000056052A - Shield case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of part items and facilitate the assembling and repair by mounting a cover on a case body in such a manner as to be movable between opened and closed states and attachable and detachable, and engagingly locking the cover to the case body under the closed condition where the cover is put thereon. SOLUTION: This shield case is formed into a hollowed rectangular box as the whole by integrally assembling a cover 12 to a case body 10. The case body 10 comprises rectangular wall side plates 14 stood at a right angle and support side plates 16 stood at a right angle from the short edge of a bottom plate. The free end of each support side plate 16 is bent at a right angle outward to form a base for supporting the other part. The cover 12 comprises a flat rectangular top plate and rectangular side plates 18 bent at a right angle from a pair of long edges of the top plate, which are integrated in reverse U-shape as the whole. As mooring means, receiving parts are provided on the side plates 18 of the cover 12 and mooring parts are provided on the wall side parts 14. As engagingly locking means, protrusions are provided on the wall side parts 14, and recess are provided on the side plates 18 of the cover 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield case provided with a structure for detachably attaching a lid to a case body.

[0002]

2. Description of the Related Art In a conventional electric device, in order to prevent noise from entering an electric circuit from an external electric or magnetic field, a shield case covers the electric circuit portion and the entire chassis of the device. I have. The shield case used in this way is formed in a closed container made of a metal or the like that shields an electric or magnetic field, and is used for storing equipment in the shield case or performing maintenance and repair of the equipment. The lid is configured to be detachable from the case body.

[0003] In such a shield case, a screw is usually used to removably fasten the lid to the case body. In the case of employing such a screw fastening structure, for example, through-holes are drilled at four corners of the lid in a rectangular box-shaped shield case, and the tip screw portions of the screws respectively passed through the respective through-holes correspond to each of the case body. The lid is fastened integrally to the case body by screwing into each of the screw holes drilled at the position, thereby forming a sealed container-shaped shield case.

[0004]

In a shield case using the above-mentioned screw fastening structure, a plurality of screw parts are required to fasten the respective corners of the lid, respectively.
Moreover, since a screw hole for inserting the screw component is formed in the case main body or the lid body, screw hole processing using a tap is required, and the number of parts increases, and the processing becomes complicated. Also, when placing the electrical equipment in such a shield case, for example, at the time of assembling and manufacturing, pick up the screws stocked in the work place at multiple places such as the four corners of the shield case and remove it from the tip. This requires a lot of troublesome and troublesome work of passing through the through hole of the lid, aligning the tip of the screw with the screw hole of the case body, and screwing it in, thus reducing the work efficiency. In addition, when performing maintenance or repair of the electric device part in the shield case, remove all screws at the four corners of the shield case and store it, remove the lid from the case body, put it in another place, and Do the work. After this work, pick up the lid that was stored in another place again, position this lid with respect to the case main body, and work to fasten the four corners with each screw, so workability Bad, the product became expensive.

SUMMARY OF THE INVENTION In view of the above, the present invention provides a new shield case in which the number of separate parts for fastening is reduced, and operations such as assembly, manufacture, maintenance, and repair are facilitated. Aim.

[0006]

According to a first aspect of the present invention, there is provided a shield case comprising a cover body integrally attached to a case body, wherein the cover body is closed to the case body. Mooring means that can be mounted between the state and the open state in a detachable manner, and locking means for locking the lid to the case main body in a closed state in which the lid is covered by the mooring means on the case main body And the following.

With the above-described structure, when the locking means is released, the lid supported by the mooring means is opened, and operations such as maintenance or repair of the device in the case main body can be performed. Further, even during assembly and manufacture, the lid supported by the mooring means with respect to the case main body can be handled similarly to an integral member, which is convenient, and the work of incorporating the device into the case main body with the lid opened can be easily performed. The work can be performed easily, and a separate screw part is not required, thereby facilitating the work.

According to a second aspect of the present invention, in the shield case according to the first aspect, the mooring means includes a rising portion bent from the plate surface and a laterally extending portion bent parallel to the plate surface. The protruding piece with a part, the rising part of the protruding piece,
And an opening for loose insertion.

With the above construction, in addition to the functions and effects of the shield case according to the first aspect, the projecting piece as the mooring means and the opening are each formed of a case body or a cover formed of a sheet metal. When it is formed by processing such as punching, an integrated structure can be formed by simultaneously processing in the same processing steps such as sheet metal and punching. Further, since the laterally extending portion of the protruding piece hits the periphery of the opening so as to press the rising portion so as not to be pulled out from the opening, the protruding piece can be prevented from coming off from the opening.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A shield case according to an embodiment of the present invention is shown in FIGS. 1 to 3
As shown in FIG. 1, the lid 12 is integrally assembled to the case body 10 so as to form a hollow rectangular box as a whole.

In this case body 10, rectangular wall side plates 14 (horizontal side portions) are respectively erected at right angles from two long sides, and support side plates 16 are respectively erected at right angles from two short sides of a bottom plate. Has been established. The free end portion of each of the support side plates 16 is bent outward at a right angle, and is formed on a platform that supports other members.

The lid 12 has rectangular side plates 18 bent at right angles from a pair of long sides of a flat rectangular top plate, and is formed in an inverted U shape as a whole.

In this shield case, a predetermined width portion of the free end of each corresponding side plate 18 of the lid 12 is superimposed on a predetermined width portion of the free end side of each wall side plate 14. Be integrated.

As shown in FIG. 1 and FIG.
An anchoring means is formed at each part near the end on the arrow G side in the drawing of the portion where the side plate 18 and the side plate 18 are overlapped,
Further, at each part near the end side on the arrow F side in the figure, a concave / convex locking structure as locking means and a screw fastening portion for maintaining the connection are formed.

The mooring means is configured to allow the receiving portion to removably and rotatably support the mooring portion. In the present embodiment, the mooring portion is provided on each wall side plate 14 of the case main body 10, and the lid is provided. A receiving portion is provided on the side plate 18 of the body 12. The side plate 18 may be provided with a mooring portion, and the wall side plate 14 may be provided with a receiving portion.

As shown in FIGS. 4 and 5, the mooring section
A predetermined portion of each wall side plate 14 is punched into a substantially U-shaped front, and the tongue-shaped protruding piece 20 left in the punched portion is bent at a base end thereof so as to rise from each wall side plate 14 at a right angle. Rising portion 20A and the rising portion 20A
And each wall side plate 14 and a laterally extending portion 20B which is bent in parallel, and is bent in a substantially Z-shape so as to extend outward by one step. The height of the rising portion 20A is determined so that the width H of the space between the free end portion and the wall side plate 14 is slightly larger than the thickness of the side plate 18. The song is formed.

The projecting piece 20 thus formed can be formed at the same time when the wall side plate 14 of the case body 10 is subjected to sheet metal and punching, thereby reducing the number of working steps.

The receiving portion has a small rectangular opening 22 formed at a predetermined position of each side plate 18 and is linearly continuous from this opening 22 and is opened to a free end of the side plate 18. Through groove 2
2A is formed.

The width L of the opening 22 is slightly larger than the width W of the rising portion 20A of the projecting piece 20. Further, the groove width S of the through groove portion 22A is formed slightly larger than the thickness of the rising portion 20A of the projecting piece 20.

The notch of the opening 22 and the through groove 22A can be cut at the same time as the punching of the side plate 18 of the lid 12, and the number of working steps can be reduced.

The locking means is configured to removably lock the convex portion to the concave portion. In the present embodiment, the convex portion is provided on each wall side plate 14 of the case body 10 and the convex portion is provided on the side of the lid 12. A recess is provided in the side plate 18. In addition, you may provide a convex part in the side plate 18, and provide a recessed part in the wall side plate 14.

As shown in FIGS. 6 and 7, as a concave / convex locking structure of the locking means, a small columnar projection 32 is formed at a predetermined position on each wall side plate 14. As shown in FIG.

The projections 32 formed in this manner can be formed at the same time when the wall side plate 14 of the case body 10 is subjected to sheet metal and punching, and the number of working steps can be reduced.

Also, each side plate 18 is provided as an uneven locking structure.
A locking hole 34, which is a through hole slightly larger in diameter than the projection 32, is formed at a predetermined location.

It should be noted that the locking hole 34 is formed by the lid 12
Can be simultaneously performed when the side plate 18 is punched, and the number of working steps can be reduced.

As shown in FIGS. 1 to 3, 6 and 7, each wall side plate 14 and side plate 18 is provided with a screw fastening portion at a position adjacent to the locking means, and a screw 24 is used. It has a screw fastening structure. That is, the case body 10
A screw hole 26 for screwing the screw 24 is formed at a predetermined position of each wall side plate 14. Further, through holes 28 for passing the shafts of the screws 24 are formed at predetermined positions corresponding to the screw holes 24 of each side plate 18 of the lid 12. Here, this screw fastening portion structure assists the locking of the lid 12 with the case body 10 by the locking means, and may be omitted.

Next, the use and operation of the shield case according to the present embodiment configured as described above will be described.

First, when assembling the shield case, the mooring means between the case body 10 and the lid 12 is engaged, and then the locking means is connected. The work of mooring the mooring means
As shown in FIGS. 4 and 5, the base end side rising portion 20A of the projecting piece 20 of the case main body 10 that is bent so as to rise one step is passed through the through groove 22A of the lid 12 in the direction of arrow A in FIG. 5. By pushing the protruding piece 20 into the opening 22 in the direction of arrow B in FIG.
The engagement state shown in FIGS. 1 and 4 is assumed.

In this state, the rising portion 2 of the projection 20
0A is loosely fitted into the opening 22 and the laterally extending portion 20A sandwiches the side plate 18 with the wall side plate 14. 12 is movable between a closed state shown in FIG. 1 and an open state shown in FIG. 3, and is supported such that the rising portion 20A does not come off the opening 22.

In the open state of the lid 12 shown in FIG.
0 relatively rotates within the opening 22 and the through groove 22A
It is in a supporting state in contact with the inner side of the groove on the side. At the same time, the edge 12A of the top plate near the portion where the opening 22 of the lid 12 is provided is connected to the edge 14A of the wall side plate 14 near the protruding piece 20.
A or a supporting state in which the supporting side plate 16 is in contact with the supporting side plate 16.

In this open state, an assembling work for mounting the main parts of the electric equipment in the case main body 10 is performed, or a maintenance work or a repair work for the main parts of the electric equipment installed in the case main body 10 is performed. Is in an executable state. That is, in this shield case,
Even if the lid 12 is not removed from the case main body 10 and placed in another place, the lid 12 is rotated in the direction of arrow C in the drawing to be in the open state while being attached to the case main body 10. Thus, the work of assembling, maintaining, and repairing the main parts of the electric device described above can be performed. If the lid 12 is turned in the direction opposite to the arrow C in the drawing from the open state of the lid 12 shown in FIG. 3, as shown in FIG. The case body 10 can be brought into a closed state in which the lid body 12 is covered.

When the lid 12 shown in FIGS. 1 and 2 is closed, the lid 12 is
When the cover 12 is rotated in the opposite direction to
By fitting the projections 32 of the respective wall side plates 14 of the case body 10 into the locking holes 34 of the respective side plates 18 in the above, the lid 12 is integrally connected to the case body 10. As described above, the lid 12 is provided with the projecting piece 20 which is a mooring means.
Is fixedly attached to the case main body 10 by the anchoring of the opening 22 and the coupling in which the projection 32 fits into the locking hole 34 serving as locking means.

After the lid 12 is integrally attached to the case main body 10 as described above, when maintenance or repair of the electric equipment housed therein is performed, the shield case and the case main body 10 must be connected to each other. The operation such as maintenance or repair can be performed only by removing the projection 34 from the locking hole 32 serving as the locking means and opening the lid 12 as described above. Therefore, at this time, the case body 10
It is possible to save the work of removing and storing in another place. In the conventional configuration in which the four corners of the case body 10 and the lid 12 are screwed, to remove the lid 12,
The four screws must be removed and stored, but in the present embodiment, it is only necessary to remove the projections 34 from the locking holes 32, so that the number of screws can be reduced and labor can be saved. Also,
When the lid 12 is completely removed from the case body 10, when the lid 12 is assembled to the case body 10 again,
It takes time and labor to perform a fine work of fitting the respective end portions of the wall side plate 14 and the side plate 18 so as to overlap each other and aligning the through holes 28 and the screw holes 26 so as to communicate with each other. In the embodiment, the lid 12 in the open state is turned to the closed state, and the lid 12 is integrally assembled to the main body 10 by a simple one-touch operation simply by fitting the projection 34 into the locking hole 32, so that the lid 12 can be quickly assembled. Can work.

Next, when the lid 12 is to be more firmly fixed to the case main body 10, the lid 12 can be fastened with the lid 12 over the case main body 10 by screwing.

In this case, as shown in FIGS. 1 and 2, when the cover 12 is closed, each wall side plate 1 of the case body 10 is inserted into the locking hole 34 of each side plate 18 of the cover 12.
By fitting the projections 32 of the case 4, the case body 10
The cover 12 is integrally connected to the cover. As a result, the screw hole 26 and the through hole 28 can be aligned with each other, so that the screw can be easily fixed, and in addition to the concave and convex locking of the locking means,
The cover 12 is firmly fixed to the case body 10 by fastening using the screws 24.

In the above-described embodiment, the structure using two screws as the fastening structure for attaching the lid 12 to the case body 10 has been described.
Alternatively, three or more screws may be used, or other fastening means may be used.

[0037]

According to the shield case of the present invention, the lid can be integrally locked to the case body with a simple structure having a small number of parts, and further, the lid is opened and the device is incorporated inside. There is an effect that operations such as assembly manufacturing, maintenance, and repair can be easily performed.

[Brief description of the drawings]

FIG. 1 is an overall side view showing an embodiment of a shield case of the present invention.

FIG. 2 is an overall bottom view showing the embodiment of the shield case of the present invention.

FIG. 3 is an overall side view of a shield case according to an embodiment of the present invention in a state where a lid is in an open state.

FIG. 4 is an enlarged perspective view of a main part of a mooring means provided between a case body and a lid showing an embodiment of the shield case of the present invention.

FIG. 5 is an enlarged exploded perspective view of a main part showing a part of mooring means for a case body and a lid showing an embodiment of the shield case of the present invention.

FIG. 6 is an enlarged perspective view of a main part of a locking means provided between a case body and a lid showing an embodiment of the shield case of the present invention.

FIG. 7 is an enlarged exploded perspective view of a main part showing a part of a locking means for a case body and a lid showing an embodiment of the shield case of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Case main body 12 Lid 14 Wall side plate 18 Side plate 20 Protrusion piece 22 Opening 22A Through-groove part 24 Screw 26 Screw hole 28 Through-hole

Claims (2)

[Claims] 1. A shield case configured by integrally attaching a lid to a case main body, wherein the lid can be shifted between a closed state and an open state and detachable with respect to the case main body. And a locking means for locking the lid to the case body in a closed state in which the lid is covered by the mooring means on the case body. Shield case. 2. A projecting piece having a rising part bent upright from a plate surface and a laterally extending part bent parallel to the plate surface from the mooring means, and a rising part of the projecting piece. The shield case according to claim 1, further comprising: an opening for loosely inserting.