JPH06326481A - Printed wiring board arrangement electronic apparatus - Google Patents

Abstract

PURPOSE:To facilitate maintenance inspection work of a printed wiring board, and prevent a shelf from getting out from a cabinet at the time of carriage, earthquake, etc., regarding a printed wiring board arrangement electronic apparatus having a shelf which loads many printed wiring boards by inserting them from the side surface direction, and a cabinet which accommodates a plurality of the shelfs in parallel by inserting them from the front side direction. CONSTITUTION:A shaft member 24 which is fixed to the front corner lower part of each shelf 5 so as to horizontally span the front surface, and an engaging member 25 which has a nearly circular section and is fixed to the front part of each accommodation chamber 22 of a cabinet 2 so as to engage with the shaft member 24 are installed, and each of the shelf 5 is loaded in the accommodation chamber 22, so as to able to swing around the shaft member 24 as a fulcrum.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shelf in which a large number of printed wiring boards are accommodated in parallel by inserting and removing from the side, and a cabinet in which a plurality of shelves are accommodated in parallel by inserting and extracting from the front. The present invention relates to a printed wiring board array electronic device having a cabinet on which cabinets are mounted in multiple stages.

[0002]

2. Description of the Related Art A shelf that can be inserted and removed from the front of a rack
If relatively small printed wiring boards are accommodated in parallel, the rack will be small in the depth direction and long in the left-right direction, which makes the rack unstable. In addition, a long maintenance work area is required on the front of the rack in the left-right direction.

In order to solve this problem, an electronic device which accommodates a large number of small printed wiring boards has a structure in which the depth direction of the rack is large and the maintenance work area on the front side of the rack is small. ing.

FIG. 6 is a side sectional view of such a conventional example, and FIG.
[Fig. 4] is a perspective view of a conventional example. As shown in the drawing, cabinets 2 are mounted in multiple stages on a rack 1 having a large depth, and a plurality of shelves 5 are accommodated in parallel in each cabinet 2.

Further, the air intake / exhaust units 7 are mounted on the upper and lower stages of the cabinets 2, respectively, so that the printed wiring boards plug-mounted on the shelves 5 are naturally air-cooled.

The details of the cabinet and shelf are shown in FIG. The shelf 5 is a shallow box shape having a front plate 51, an upper plate 52, a lower plate 53, and a rear plate having one side surface opened and a back board 55 fixed to the other side surface, and is parallel to the upper plate 52. Provide the desired number of middle plates 56 and move the shelf 5 upwards.
It is divided into several stages such as middle and lower.

Guides are provided on the lower surface of the upper plate 52, the upper and lower surfaces of the middle plate 56, and the upper surface of the lower plate 53, and the printed wiring board 6 is inserted from the opening surface, that is, from the right side of the drawing to the shelf 5 , And a printed board connector is plugged into the connector of the backboard 55 to mount a large number of printed wiring boards 6 in parallel with the shelf 5.

On the other hand, ventilation holes 58 are provided in the upper side plate 52 and the lower side plate 53, respectively, and cold air enters the shelf 5 through the ventilation holes 58 of the lower side plate 53 of the shelf 5 and rises between the printed wiring boards 6. To cool the printed wiring board 6 and to ventilate holes 58 in the upper plate 52.
It is designed to get out of.

When the individual front boards 61 are attached to the front side edges of the respective printed wiring boards 6 and all the printed wiring boards 6 are mounted on the shelf 5, the individual front boards 61 are arranged and the opening surface of the shelf 5 is arranged. Are blocked so that the cooling performance of the printed wiring board 6 is improved.

The cabinet 2 for accommodating a plurality of shelves 5 in parallel is composed of a pair of left and right side plates 21, a rear face plate, and a lower frame member, and the front side edges of each side plate 21 are bent at right angles to the outside and fixed. A plate portion 2A is provided.

Further, a partition plate 21A parallel to the side plate 21 is provided, and a rectangular parallelepiped accommodating chamber 22 having a small front width is provided in parallel. Then, the shelves 5 are slid from the front and pushed in, and the shelves 5 are mounted in the respective accommodation chambers 22.

The cabinet 2 is fixedly mounted on the rack 1 by pushing such a cabinet 2 onto the shelf plate of the rack 1 and screwing the fixing plate portion 2A to the front side member of the rack 1. The lower frame member of the cabinet 2 is provided with a small frame member for supporting the four side edges of the lower plate of the shelf 5 on the lower surface of each accommodation chamber 22.

Therefore, as shown by the dotted line in FIG. 6, the cold air on the front surface F of the rack enters through the front opening of the lower intake / exhaust air unit 7, and along the fixed convection guide plate 71 whose rear portion is inclined obliquely upward. Is guided and enters the shelf 5. Then, after cooling each printed wiring board 6, the printed wiring boards 6 rise into the upper air intake / exhaust unit 7
It is discharged to the rear of the cabinet 2 through the rear opening of 7.

A space forming a ventilation duct is provided between the rear plate of the rack and the rear part of the cabinet 2. Route the cables 9 using this ventilation duct, and connect the cables 9 to the connectors on the backboard 55 of each shelf 5.
To connect the external device to the shelf 5.

[0015]

By the way, the above-mentioned conventional shelf has a structure in which it is mounted in the cabinet by horizontally inserting and removing it from the front side of the cabinet, that is, the front side F of the rack.

Therefore, in order to carry out maintenance and inspection of the printed wiring board, it is necessary to pull out the shelf from the cabinet, and it is required to have a structure such that the pulled-out shelf can be placed on the floor or held in the pulled-out state. .

In the former case, there is a problem that the setup work requires a lot of time. In the latter case, there is a problem that the structure of the shelf or cabinet becomes complicated.

Further, since the shelf slides on the lower frame member of the cabinet and is mounted in the storage chamber, the extra length portion 9A of the cable is treated behind the shelf, that is, by extra length treatment such as meandering in the ventilation duct. Therefore, there is a problem that the ventilation of the ventilation duct is hindered by the extra length portion 9A.

On the other hand, there is a risk that the shelf may come out of the cabinet during an earthquake or transportation during operation. The present invention has been made in view of the above circumstances, and an object thereof is to provide a printed wiring board array electronic device that facilitates maintenance and inspection work of the printed wiring board.

Another object is to prevent the shelf from coming out of the cabinet during transportation or an earthquake.

[0021]

In order to achieve the above object, the present invention has a front board 51, an upper board 52, in which printed wiring boards 6 are plugged in in parallel as shown in FIG.
Shelf 5 with a box-shaped structure consisting of a lower plate 53 and a rear plate 54, one side surface of which is open and a back board 55 is fixed to the other side surface.
A cabinet 2 in which the storage chambers 22 for mounting the shelves 5, which are open at the front and the top, are arranged in the left-right direction, a rack for mounting the cabinets 2 in multiple stages, and an upper stage and a lower stage of each cabinet 2. In the electronic device having the intake and exhaust unit mounted on the rack,
Shaft members 24 attached to the lower front corners of the respective shelves 5 so that the front surface is laid horizontally, and substantially semicircular side views attached to the front portions of the respective accommodation chambers 22 so as to engage with the shaft members 24. Of the engaging member 25, and the shelf 5 is swingably mounted on the shaft member 24 in the accommodation chamber 22.

Further, a cylindrical member 82A attached to the front plate 51 of each shelf 5 so that its axis is oriented in the vertical direction.
And another cylindrical member 82B attached to the lower portion of each accommodation chamber 22 of the cabinet 2 so that the axis thereof is oriented in the front-back direction.
And a support bar 92 that can be fitted into both the cylindrical members 82A and 82B. The support bar 92 rotates the shelf 5 in the forward direction with the shaft member 24 as a fulcrum and takes it out to the front surface of the cabinet 2 and then It shall penetrate through the cylindrical members 82A, 82B.

Further, the front plate of each shelf 5 is engaged with the connecting bar 91 which is provided on the front surface of the cabinet 2.
A holder member 81A attached to 51 and another holder member 81B fixed to the front surface of the cabinet 2 or the rack 1 so as to engage with the connecting bar 91 are provided.

Alternatively, as illustrated in FIG. 4, the convection guide plate 31 of the air intake / exhaust air unit 3 is swingably mounted with the upper rear portion of the air intake / exhaust air unit 3 as a fulcrum.

[0025]

The shelf of the present invention, in which the printed wiring board is inserted and removed from the side, is mounted by rotating in the forward direction with the shaft member as the fulcrum at the time of maintenance and inspection of the printed wiring board.
The shelf opening is bare on the front of the cabinet.

Therefore, since the printed wiring board can be easily removed from the shelf, the setup work for maintenance and inspection of the printed wiring board becomes extremely simple. Also, by connecting the cable to the backboard near the axis of rotation of the shelf, the length of the cable hardly changes even when the shelf is rotated during maintenance and inspection. Therefore, the ventilation of the ventilation duct is not impaired.

Furthermore, during maintenance and inspection of the printed wiring board,
By rotating the shelf forward and then passing the support bar through both the front plate and the cylindrical members attached to the cabinet, the shelf is held in the front of the cabinet without rocking from side to side or up and down.

Therefore, the maintenance / inspection work of the printed wiring board can be carried out without holding the shelf by hand, and the safety of the maintenance / inspection work is secured. On the other hand, the convection guide plate of the air intake / exhaust air unit is swingable around the upper rear part of the air intake / exhaust air unit as a fulcrum.

As a result, when the shelf is rotated in the forward direction and the rear portion of the upper plate hits the lower surface of the convection guide plate, the convection guide plate swings and is lifted. Therefore, the maintenance and inspection of the printed wiring board can be performed without removing the air intake / exhaust unit.

When the shelf has been rotated to the front of the cabinet, the convection guide plate returns. Therefore, even if another shelf is in operation, the cooling performance of the printed wiring board housed in the other shelf does not deteriorate.

On the other hand, at the time of operation or transportation, since the connecting bar is laid across the front surface of the cabinet, the shelf is prevented from coming out of the cabinet.

[0032]

The present invention will be described in detail with reference to the drawings. The same reference numerals denote the same objects throughout the drawings.

FIG. 1 is a configuration diagram of an embodiment of the present invention, FIG. 2 is a perspective view of the embodiment of the present invention, FIG. 3 is a side sectional view of the embodiment of the present invention, and FIG. 4 is a perspective view of an air intake / exhaust unit. 5 is a rear perspective view of the shelf.

As shown in FIGS. 1 to 3, the shelf 5 has an opening on one side and a backboard 55 on the other side.
The front plate 51, the upper plate 52, the lower plate 53 and the rear plate to which the
It is a shallow box shape consisting of 54, and a desired number of intermediate plates 56 parallel to the upper plate 52 are provided to divide the inside of the shelf 5 into several stages such as upper, middle, and lower.

Guides are provided on the lower surface of the upper plate 52, the upper and lower surfaces of the middle plate 56, and the upper surface of the lower plate 53, and the printed wiring board 6 is inserted from the opening surface, that is, from the right side of the drawing, the shelf 5 is inserted. , And a printed board connector is plugged into the connector of the backboard 55 to mount a large number of printed wiring boards 6 in parallel with the shelf 5.

On the other hand, ventilation holes 58 are provided in the upper side plate 52 and the lower side plate 53, respectively, and cold air enters into the shelf 5 from the ventilation holes 58 of the lower side plate 53 of the shelf 5 and rises between the printed wiring boards 6. To cool the printed wiring board 6 and to ventilate holes 58
It is designed to get out of.

An individual front board 61 is attached to the front side edge of each printed wiring board 6, and all the printed wiring boards 6 are attached.
When mounted on the shelf 5, the individual front plates 61 are arranged so that the opening surface of the shelf 5 is closed and the cooling performance of the printed wiring board 6 is improved.

A pin-shaped shaft member 24 is attached to the shelf 5 of the present invention so as to horizontally extend across the lower front corner. Further, a pair of upper and lower cylindrical members 82A are fixed to the front plate 51 of the shelf 5 by welding or the like so that the axis of the shelf 5 is oriented in the vertical direction. The inner diameter of the cylindrical member 82A is such that the columnar support bar 92 can be loosely inserted.

Furthermore, a holder member 81A having a U-shape in a side view, which is opened upward, is provided at a position where it does not interfere with the insertion of the support bar 92 into the cylindrical member 82A at a substantially middle portion in the height direction of the front plate 51. Are fixed by welding or the like.

The holder member 81A supports and engages the connecting bar 91 which is laid horizontally on the front surface of the cabinet 2. By setting the opening width of the connecting bar 91 equal to the inner diameter of the cylindrical member 82A described above, the supporting bar 92 and the connecting bar 91 are
Can be used also as, and the support bar 92 need not be specially provided.

As shown in FIG. 5, the lower plate 53 of the shelf 5 is extended so as to extend outward from the lower edge of the backboard 55, and an extending portion is provided. The plywood 59 is attached to the back side of the shelf 5.

The cable 9 is pulled out from the rear of the shelf 5 to the front side, and the cable connector 9C is plugged into a backboard connector provided near the shaft member 24. on the other hand,
The cabinet 2 which accommodates the plurality of shelves 5 in parallel in the left-right direction is composed of a pair of left and right side plates 21, a rear face plate, and a lower frame member. The front side edges of the side plates 21 are bent at right angles to the outside and fixedly attached. The plate portion 2A is provided, and the fixed plate portion 2A is screwed to the front side member of the rack 1.

By providing the partition plate 21A parallel to the side plate 21, the rectangular parallelepiped accommodating chambers 22 having a small front width are provided in parallel, and the shelves 5 are mounted in the respective accommodating chambers 22.

The lower frame member of the cabinet 2 is provided with a small frame member for supporting the four side edges of the lower plate of the shelf 5 on the lower surface of each accommodation chamber 22. The cabinet 2 of the present invention further includes the following items.

Each partition plate 21A of the cabinet 2 is provided with a vertically long stopper 23 whose width is substantially equal to the width of the engaging plate 59 of the shelf 5 by bending the front side edge of each partition plate 21A at right angles. The stopper 23 is also provided on the front side edge of one side plate 21.

Further, the front part of each accommodation chamber 22 is engaged with a shaft member 24 attached to the lower front corner of the shelf 5.
An engagement member 25 having a substantially semicircular shape in side view is provided. A cylindrical member 82B having an inner diameter dimension into which the support bar 92 can be fitted is attached to the lower portion of each accommodation chamber 22 of the cabinet 2 by welding or the like so that the axial center is oriented in the front-rear direction.

As shown in FIG. 2, the left and right front side members of the rack 1 are located at desired positions (corresponding to the holder members 81A of the shelf 5) at the desired positions. Are fixed by welding or the like.

The holder member 81B has substantially the same size as the holder member 81A attached to the front plate 51 of the shelf 5. On the other hand, in the intake / exhaust air unit 3 mounted on the rack 1 so as to be located in the upper and lower stages of each cabinet 2, the convection guide plate 31 is swingable with the upper rear portion of the intake / exhaust air unit 3 as a fulcrum.

More specifically, as shown in FIG. 4, the intake / exhaust air unit 3 has a pair of left and right side plates 33 connected to each other via a rear surface frame member 32, and the inclined convection guide is directed downward between the pair of side plates 33. A plate 31 is attached. The rear edge of the convection guide plate 31 and the upper frame member of the rear surface frame member 32 are connected via a hinge 35.

The pin portions 36 provided so as to project outward from the left and right side edges of the convection guide plate 31 are provided near the front side edge of the side plate 33 and are fitted into the arc-shaped guide groove 37, so that the convection guide plate is formed. 31 swing range is restricted.

As shown in FIG. 3, the cabinet 2 as described above is pushed onto the shelf plate (shelf plate 1B shown in FIG. 2) of the rack 1, and the fixing plate portion 2A is screwed to the front side member of the rack 1. do it,
The cabinet 2 is fixedly mounted on the rack 1.

Then, the shelf 5 is inserted into each accommodation chamber 22 of the cabinet 2, the shaft member 24 is fitted into the engaging member 25, and the shelf 5 is mounted in the cabinet 2. Further, the connecting bar 91 is laid horizontally on the front surface of the cabinet 2 and inserted into the holder members 81A and 81B arranged in one horizontal row to prevent the shelf 5 from moving in the front-rear direction.

Therefore, the shelf 5 is prevented from coming out of the cabinet 2 during operation or transportation. Further, during operation, as shown by the dotted line, the cold air on the front surface F of the rack enters through the front opening of the lower intake / exhaust air unit 3 and is guided along the convection guide plate 31 whose rear portion is inclined upward. Intrude into the shelf 5. Then, after cooling the respective printed wiring boards 6, the upper intake / exhaust air unit 3
Inside, and along the convection guide plate 31 of the upper air intake / exhaust unit 3 obliquely upward, is discharged from the rear opening of the air intake / exhaust unit 3 to the rear of the cabinet 2, and rises in the ventilation duct to rise to the rack 1 The printed wiring board 6 has good cooling performance because it is discharged above.

As shown in FIG. 5, the cable 9 is pulled out from the ventilation duct, and the cable connector is connected to the backboard connector attached to the position near the front of the shelf 5. It is not meandering.

That is, the cable 9 is less likely to obstruct the ventilation of the ventilation duct. When the shelf 5 is rotated forward and the printed wiring board 6 is maintained and inspected, the length of the cable hardly changes, so that it is not necessary to perform extra length treatment and the ventilation of the ventilation duct is impaired. There is no.

For maintenance and inspection of the printed wiring board 6, the connecting bar 91 is first removed from the holder members 81A and 81B. Next, the support bar 92 or the connection bar 91 is inserted into the cylindrical member 82A attached to the front plate 51 of the shelf, and the support bar 92 is attached.
The upper part of the (connecting bar 91) is pulled to the front side, and the shelf 5 is rotated in the forward tilting direction with the shaft member 24 as the fulcrum.

When the shelf 5 is rotated 90 degrees, the shelf 5
The engaging plate 59 attached to the
Since it abuts on the back surface of 23, the shelf 5 does not rotate any more.

Then, the support bar 92 (connecting bar 91) is pushed in the direction of the cabinet 2 so that the tip of the support bar 92 (connecting bar 91) is moved to the cabinet 2.
Insert it into the cylindrical member 82B attached to. This prevents the shelf 5 from swinging vertically and horizontally.

In this state, since the opening of the shelf 5 is bare on the front surface of the cabinet 2, the printed wiring board 6 can be maintenance-inspected by removing the printed wiring board 6 from the shelf 5.

On the other hand, since the convection guide plate 31 of the intake / exhaust air unit 3 is swingably mounted, when the shelf 5 is rotated forward, the rear portion of the upper plate 52 of the shelf 5 causes the convection of the intake / exhaust unit 3 to flow. The lower surface of the guide plate (31) is pushed up and rocked, and the front part of the convection guide plate (31) is lifted. Therefore, the air intake / exhaust unit 3 does not hinder the rotational movement of the shelf 5.

When the shelf 5 is completely rotated to the front of the cabinet 2, the convection guide plate 31 returns, so that the printed wiring boards accommodated in the other shelves are cooled even when the other shelves are in operation. There is no deterioration in sex.

[0062]

As described above, the present invention has the effect that the setup work for the maintenance and inspection of the printed wiring board is extremely simple and the safety of the maintenance and inspection work is ensured.

Also, there is little risk that the cable connected to the external device will obstruct the ventilation of the ventilation duct. Furthermore, it has the effect that the shelf is prevented from coming out of the cabinet during operation or transportation.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a perspective view of an embodiment of the present invention.

FIG. 3 is a side sectional view of an embodiment of the present invention.

FIG. 4 is a perspective view of an air intake / exhaust unit.

FIG. 5 is a rear perspective view of the shelf.

FIG. 6 is a side sectional view of a conventional example.

FIG. 7 is a perspective view of a conventional example.

[Explanation of symbols]

1 rack 2 cabinet 3,7 air intake / exhaust unit 5 shelf 6 printed wiring board 9 cable 21 side plate 21A partition plate 22 housing chamber 23 stopper 24 shaft member 25 engaging member 31 convection guide plate 51 front plate 55 backboard 59 engaging plate 71 fixed Convection guide plate 81A, 81B Holder member 82A, 82B Cylindrical member 91 Connecting bar 92 Support bar

Claims (4)

[Claims] 1. A box shape comprising a front plate, an upper plate, a lower plate, and a rear plate, in which printed wiring boards (6) are mounted in parallel by plug-in, one side surface is open and the other side surface is a backboard (5
A cabinet (2) in which a shelf (5) to which the shelf (5) is fixed and a storage chamber (22) in which the shelf (5) is mounted and which is open at the front and the top are arranged in the left-right direction.
And a rack on which the cabinets (2) are mounted in multiple stages, and an air intake / exhaust unit mounted on the racks so as to be located above and below the cabinets (2), respectively. The shaft members (24) attached to the front lower corners of the respective shelves (5) so that the shaft members are crossed, and the front of the respective accommodation chambers (22) for engaging the shaft members (24). An engaging member (25) having a substantially semicircular shape attached to a side portion, and the shelf (5) is mounted in the accommodating chamber (22) so as to be swingable about the shaft member (24) as a fulcrum. A printed wiring board array electronic device characterized by the following. 2. A cylindrical member (82) attached to a front plate (51) of each shelf (5) so that its axis is directed vertically.
A) and another cylindrical member (82) attached to the lower part of each accommodation chamber (22) of the cabinet (2) so that the axis is oriented in the front-back direction.
B) and a support bar (92) that can be fitted into both of the cylindrical members (82A, 82B).
The support bar (92) is provided with the shaft member (24) as a fulcrum.
The printed wiring according to claim 1, wherein (5) is rotated in a forward direction and taken out to the front surface of the cabinet (2), and then penetrated through both the cylindrical members (82A, 82B). Plate array electronics. 3. A holder member (81A) attached to a front plate (51) of each of the shelves (5) so as to engage with a connecting bar (91) extending across the front surface of the cabinet (2), In order to engage with the connecting bar (91), another holder member (81B) fixed to the front part of the cabinet (2) or the rack (1),
The printed wiring board array electronic device according to claim 1 or 2, further comprising: 4. The convection guide plate (31) of the intake and exhaust unit (3)
5. The printed wiring board array electronic device according to claim 1, wherein the air intake / exhaust unit (3) is swingably mounted with an upper rear portion of the air intake / exhaust unit (3) as a fulcrum.