JP3039587B2 - Subrack - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subrack used for industrial control equipment, and more particularly to an improvement in a structure which accommodates various units and is easy to assemble.

[0002]

2. Description of the Related Art The present applicant has disclosed, for example, Japanese Utility Model Application Laid-Open No. 2-6769.
No. 6 proposes a structure for mounting a fan unit on a subrack (nest), and Japanese Utility Model Laid-Open Publication No. 2-76888 proposes a structure of a cabinet fan unit. Such a fan unit generates a forced air flow to exhaust heat generated by a subrack or an electronic circuit housed in a cabinet.

A printed circuit board mounted on the subrack is, for example, a so-called plug-in unit as disclosed in Japanese Patent Application Laid-Open No. 45199/1988. The plug-in unit has, in addition to the printed circuit board on which the electronic circuit is mounted, a connector portion connected to a connector provided on the subrack side, and a front plate that covers the opening of the subrack.

[0004]

By the way, the fan unit is mounted on either the intake side or the exhaust side on the basis of the electronic circuit. However, when the fan unit is mounted on the exhaust side, all air is necessarily removed by a filter to remove dust. In some cases, dirty air flowing from a gap generated near the opening of the subrack may be partially mixed. Then, dust adheres to the electronic components inside the subrack, and there is a problem that the plug-in unit housed in the subrack must be cleaned.

Conventionally, the shape of plug-in units has been unified. However, with the recent progress in integration of electronic circuits and the demand for cost reduction, the shape has been differentiated according to the function of each plug-in unit. For example, it is categorized into a full height of a standard width and a half height of a half width. In this case, it is necessary to accommodate each type of plug-in unit on the subrack side as well, but there are problems that the mechanism of the subrack becomes complicated and assembly work becomes complicated. An object of the present invention is to solve such a problem, and an object of the present invention is to provide a subrack that has an air cooling mechanism that does not allow dust to enter therein, can accommodate each type of plug-in unit, and is easy to assemble. .

[0006]

In order to achieve the above object, the present invention provides a bottom plate (10), left and right side plates (20), a ceiling plate (50), and a back board (6) provided on the back surface.
In the box-shaped subrack having 2), the middle plate (40) attached to the left and right side plates at an interval for accommodating the ceiling plate and the full height unit, and the left and right side plates at an interval for accommodating the intermediate plate and the interface unit. A fan is inserted between the ventilation plate (30) attached to the
Fan from front panel (12) of fan room having window (12)
A filter mounting bracket in which the filter is housed outside the fan unit while the unit is inserted
(18) is attached in a drawer shape to provide ventilation holes
Suspended between the bottom plate and the middle plate and the ceiling plate,
A partition plate (70) on which the half-height unit is mounted on the middle plate side and the ceiling plate side, respectively, and a ventilation hole are provided.
The air sucked by the filter unit is
A ventilation hole is provided so as to be discharged to the outside through
A subrack comprising: a ceiling plate; and the backboard having a connector (66) to which a full height unit, a half height unit, and an interface unit to be mounted are connected.

[0007]

The room between the ceiling plate and the middle plate accommodates a full height unit. If a partition plate is attached between the ceiling plate and the middle plate, it will be converted into a room that houses a half-height unit. Between the middle plate and the ventilation plate is a room for accommodating the interface unit. The space between the ventilation plate and the bottom plate is a chamber for accommodating the fan unit, and has a shape in which a filter is mounted outside the fan unit.

The air sucked into the subrack by the filter unit is filtered in advance to remove dust, and is discharged from the ceiling plate through the ventilation plate and the middle plate. At this time, the heat discharged from the full-height unit, the half-height unit and the interface unit is absorbed, thereby cooling with clean air.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a configuration perspective view of a subrack showing an embodiment of the present invention. In the figure, a full height unit room is located on the upper left side of the front of the subrack, and accommodates a full height plug-in unit. The upper half-height unit room is located at the upper right corner of the front of the subrack, and the lower half-height unit room is located at the middle right front of the subrack, and all accommodate half-height plug-in units. The interface unit room
It accommodates an interface unit that balances external signal lines with signals handled by internal plug-in units, and is located in the middle of the front of the subrack. The fan unit room is located at the lower front of the subrack, and two fan units are housed in the left and right rooms. The filter chamber is located immediately below the fan unit chamber and houses a filter for removing dust from passing air. The distribution board room is located in the lower right front of the subrack,
A distribution board is housed.

In the device configured as described above, air flows from the bottom surface of the subrack to the ceiling plate, and the heat generated in each plug-in unit is exhausted. In the fan unit chamber, air from which dust has been removed in the filter chamber is drawn into the subrack and discharged from the ceiling plate. Therefore, since each plug-in unit exchanges heat with clean air, dust does not adhere.

2 to 4 are three views of the subrack when the plug-in unit is not mounted. FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. 4 is a side view. FIG. 5 is an exploded view of a subrack. 6 to 8 are three views of the subrack when the plug-in unit is mounted. FIG. 6 is a plan view, FIG. 7 is a front view, and FIG. 8 is a side view. In the figure, a bottom plate 10 is a ceiling plate 50.
A fan chamber front plate 12 is provided on the front upper side of the plate member in which the same ventilation holes (not shown) are formed. The fan insertion windows 14 are two openings provided on the left and right sides of the fan chamber front plate 12, and the fan unit 94 is inserted therein. The bracket guide 16 is a pair of rails provided below the bottom plate 10, and the filter mounting bracket 18 is mounted in a drawer shape. The filter mounting bracket 18 accommodates the filter 95. When dust adheres to the filter 95, the filtering characteristics deteriorate and the air resistance increases. Therefore, the filter is replaced at regular intervals.

The side plate 20 has a substantially symmetrical shape on the left and right sides, and three bottom plate mounting holes 22 and one ventilation plate mounting hole 24 are provided for the right side plate and two locations for the left side plate. Two mounting holes 26, two top plate mounting holes 28, and three backboard mounting holes 29 are provided. The ventilation plate mounting hole 24, the middle plate mounting hole 26, and the top plate mounting hole 28 have the same shape, and claw portions for restraining the inserted side plate flange from both sides are stamped out.
The backboard mounting hole 29 sandwiches the end of the backboard 62 by a pair of bow-shaped projections formed by stamping. The reason why the ventilation plate mounting hole 24 is provided at one place in the right side plate is that a part of the ventilation plate 30 is cut off to form a distribution board room.

The ventilation plate 30 separates the fan unit chamber and the interface unit chamber, and has side plate flanges 32 which are locked in the ventilation plate mounting holes 24 at the bent portions on both sides. Ventilation port 34 is fan unit 9
4 are provided at two positions corresponding to the outer shape of the fan unit 4, and the air flow from the fan unit 94 passes therethrough. Fan support 36
Is a guide for inserting the fan unit 94 from the fan insertion window 14, and is formed by bending a sheet metal.
The notch 37 is provided with the ventilation plate 30 to secure the distribution board room.
It is the one that was excised. The guide rail 38 is the ventilation plate 30
Are mounted corresponding to each slot on the interface unit room side.

The middle plate 40 separates the interface unit room and the full height unit room. Side plate flanges 42 which are locked in the middle plate mounting holes 26 are formed in the bent portions on both side surfaces. The slot holding portion 44 is a middle plate 40
Is bent toward the bottom plate side, and serves as an opening through which air sent from the fan unit 94 passes. The unit fixing part 45 is provided on the front end face of the middle plate 40, and has a screw hole for fixing the plug-in unit 91 for each slot. The guide rail 46 is attached to the middle plate 40 on the side of the full height unit room, and is provided for each slot. The guide rail 48 is attached to the slot holding section 44 on the interface unit chamber side, and guides the insertion of the interface unit 93 by pairing with the guide rail 38. The slot lower bracket 49 is provided above the front end face of the middle plate 40. A concave portion corresponding to the guide rail 48 is formed for each slot, and the remaining portion is erroneously formed as a convex portion by a plug-in unit. Is prevented from being inserted into the subunit.

The ceiling plate 50 has a fine ventilation hole 51 substantially at the front.
Are formed in the bent portions on both side surfaces, and side plate flange portions 52 to be locked in the top plate mounting holes 28 are formed. The backboard restraining portion 53 has the same shape as the backboard mounting hole 29 provided in the side plate 20, and supports the backboard 62. The unit fixing part 54 is a ceiling plate 5
0, and a screw hole for fixing the plug-in unit 91 is provided for each slot. The slot upper bracket 55 is provided below the front end face of the ceiling plate 50. A concave portion corresponding to the guide rail 56 is formed for each slot, and the remaining portion is erroneously plugged in as a convex portion. This prevents the unit from being inserted into the subunit.

The back plate 60 is a cover attached to the back of the subrack and protects the back board 62. The back board 62 has a side flange portion 64 used for screwing to the side plate 20 on the back surface, and a connector 66 to which each of the plug-in units 91 to 93 is connected. The connectors 66 are connected to each other by wiring provided on the backboard 62, and a wiring generally called a bus connection is performed.

The partition plate 70 is suspended between the ceiling plate 50 and the middle plate 40 to convert a full-height unit room for one slot into a half-height unit room for two slots which is vertically divided. The posture is held by the collar portion 72 engaged with the middle plate 40. The guide rail 74 is attached to an area (intermediate plate) that separates the upper and lower slots of the partition plate 70. Two sets of guide rails, one for the lower half of the upper half unit chamber and one for the upper half of the lower half unit chamber, form a set, and are used for a full height unit. Guides the mounting of the half-height unit 92 in cooperation with the guide rails 56 and 46 already mounted on the connector 66, and ensures the fitting to the connector 66. The connection plate 76 increases the rigidity of the partition plate 70, and connects the intermediate plate and the side plate 20. The opening 78 connects the half-height unit room and the full-height unit room of the partition plate 70, and ensures ventilation and enhances cooling efficiency.

The material of such components is the backboard 6
2 is a printed circuit board, which is made of resin, and the connector is also molded of resin.
A steel plate of about mm is provided with a plating layer for securing insulation. In this way, the required rigidity is obtained.
Although the guide rails 38, 46, 48, and 56 are provided for each slot, they may be integrally formed using resin.

Next, an assembling operation will be described with reference to FIG.
First, the bottom plate 10 and the left and right side plates 20 are fastened with rivets to form a frame. Next, the ventilation plate 30 and the middle plate 40 are attached to the opening frame. Next, the backboard 62 is inserted along the backboard mounting hole 29.
When there is a partition plate 70, the partition plate 70 is attached to the middle plate 40 and the side plate 20 to maintain the posture. Next, the ceiling board 50 is assembled to form a closed frame, and the backboard 62 is regulated by the backboard restraining portion 53. Then, the rear plate 60 is attached. The guide rails 38, 46, 48, 56 and the upper and lower slot brackets 49, 55 are attached.

When the combination is completed, the bottom plate 10, the ventilation plate 30, the middle plate 40, the ceiling plate 50, the back board 62, and the back plate 60 are riveted or screwed from the left and right side surfaces 20 and fastened. Is completed. Next, the full height unit 91 and the half height unit 9
2 and the interface unit 93, the fan unit 94, the filter 95, and the distribution board 9
6 is assembled to complete the subrack.

FIG. 9 is a component development view showing another embodiment of the present invention. Explaining what is different from FIG. 5, a partition plate 80 is added. The partition plate 80 is suspended between the ceiling plate 50 and the middle plate 40 to convert a full-height unit room for one slot into a half-height unit room for two slots divided into upper and lower portions. Is provided. The guide rail 82 is attached to an area (intermediate plate) that separates the upper and lower slots of the partition plate 80,
The half-height unit 92 cooperates with the guide rails 56, 46 already mounted for the full-height unit.
Is guided, and the fitting to the connector 66 is ensured.
The communication plate 84 increases the rigidity of the partition plate 80, and has a front H shape in cooperation with the partition bar 86 here. The partition bar 86 is fixed to the adjacent partition plate 70. The overhang portion 88 is provided on the back side of the partition plate 80 and increases the rigidity. The partition plates 70 and 80 are attached to the right side surface to increase the number of slots for accommodating half units. If the rigidity is sufficient, the number of slots for accommodating half units may be increased by continuously providing the partition plates 70.

Further, in addition to the above-described embodiment, various plug-ins can be provided by adding a middle plate 30 and providing a space between the existing middle plate and the added middle plate for a full height unit, a half height unit, or an interface unit. The number of units accommodated in a single subrack increases.

[0023]

As described above, according to the present invention, since the chamber for accommodating the fan unit is located below the subrack, the outside air is forced into the subrack to have a positive pressure. This has the effect of increasing the reliability of electronic components. Further, since the rooms for the full height unit, the half height unit, and the interface unit are formed by using the ventilation plate 30 and the middle plate 40, various plug-in units can be accommodated.

[Brief description of the drawings]

FIG. 1 is a configuration perspective view of a subrack showing an embodiment of the present invention.

FIG. 2 is a plan view of a subrack when a plug-in unit is not mounted.

FIG. 3 is a front view of the subrack when a plug-in unit is not mounted.

FIG. 4 is a side view of the subrack when the plug-in unit is not mounted.

FIG. 5 is an exploded view of parts of a subrack.

FIG. 6 is a plan view of a subrack when a plug-in unit is not mounted.

FIG. 7 is a front view of the subrack when the plug-in unit is not mounted.

FIG. 8 is a side view of the subrack when the plug-in unit is not mounted.

FIG. 9 is a developed view of parts of a subrack showing another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 bottom plate 20 side plate 30 ventilation plate 40 middle plate 50 ceiling plate 62 backboard 70 partition plate 91 full height unit 92 half height unit 93 interface unit 94 fan unit 95 filter 96 distribution board

Claims (1)

(57) [Claims] 1. A bottom plate (10) and side plates (2) provided on the left and right sides.
0), a box-shaped subrack having a ceiling plate (50) and a backboard (62) provided on the back surface, wherein a middle plate (40) attached to the left and right side plates at an interval accommodating the ceiling plate and the full height unit. A ventilation plate (30) attached to the left and right side plates at intervals to accommodate the middle plate and the interface unit, and a fan insertion window (12) between the ventilation plates (30).
Fan unit is inserted from fan room front panel (12)
The filter is housed outside this fan unit.
The filter mounting bracket (18) to be
Ri and the bottom plate of the air vents are provided attached, the inside passed applied between the plate and the ceiling plate, a partition plate half height unit is mounted on the plate side and the ceiling plate side in each (70), ventilation A hole is provided and sucked by the filter unit
Air is discharged to the outside through the ventilation plate and the middle plate
A back plate having a connector (66) to which a full-height unit, a half-height unit and an interface unit to be mounted are connected.