JP3614209B2

JP3614209B2 - Small low voltage switchboard

Info

Publication number: JP3614209B2
Application number: JP15636995A
Authority: JP
Inventors: 司緒方
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1995-06-22
Filing date: 1995-06-22
Publication date: 2005-01-26
Anticipated expiration: 2020-01-26
Also published as: JPH099425A

Description

【０００１】
【産業上の利用分野】
この発明は、発電機等の配電もしくは制御に用いる小型の低圧配電盤に関するものである。
【０００２】
【従来の技術】
図９は従来の小型低圧配電盤を示す斜視図であり、図において１は前面を開口１ａとする箱型の筐体、２は筐体１の前面に開閉自在に取り付けられた扉、３は筐体１の底面や内側壁面あるいは扉２の裏面に取り付けられて筐体１内に収納される収納部品であり、これらの収納部品３としては、例えば遮断器、各種制御回路、充電装置、補機制御回路、警報回路、計測回路、自動電圧調整回路等があげられる。
【０００３】
このように構成された小型低圧配電盤は、通常機械部および発電機等の電気部と一緒に一体型の装置として構成され、さらにエンクロージャに収納される場合にひろく用いられるため、物理的な制約が伴う。そのため、限られた筐体１の条件下でその必要とされる機能、性能を実現させるとともに、生産性や保守性を考慮する必要がある。
この小型低圧配電盤に収納部品３を組み付けるには、扉２を開け放ち、筐体１の前部開口１ａから収納部品３を筐体１の底面や内側壁面あるいは扉２の裏面に取り付けている。この時、筐体１内の空間における収納部品３の効率的な配置を考慮し、部品の収納密度を高めている。
さらに、保守点検の際には、扉２を開け放すことにより、筐体１の前部開口１ａから保守点検作業を実施している。
【０００４】
【発明が解決しようとする課題】
従来の小型低圧配電盤は以上のように、筐体１の前部開口１ａから収納部品３の組み付けあるいは保守点検を実施するように構成されている。
そこで、収納部品３を組み付ける際に、筐体１の前部開口１ａから手や顔が入りにくく、筐体１内の底面、側面および裏面に高密度に収納部品３を組み付けにくく、さらに配線ルートの確保も困難となり、作業性が悪くなる。
また、保守点検をする際に、収納部品３の重なり合いも避けられず、奥の収納部品３を点検しようとしても、手前の収納部品３に触れてしまうという危険性がある。このような危険性を回避するために、手前の収納部品３を一旦取り外して奥の収納部品３の点検することもできるが、作業効率が著しく低下してしまうことになる。
このように、従来の小型低圧配電盤では、生産性や保守点検性が悪くなるという課題があった。
【０００５】
この発明は、上記のような課題を解決するためになされたもので、収納部品の収納点数を減らすことなく、生産性および保守点検性を著しく向上させることができる小型低圧配電盤を得ることを目的とする。
【０００６】
【課題を解決するための手段】
この発明の第１の発明に係る小型低圧配電盤は、前部を開口とする箱型の筐体と、開口から筐体に出し入れ自在に構成されて収納部品が組み付けられた箱型の台車部とを備えた小型低圧配電盤において、台車部が、底板と、底板の前部に取り付けられて筐体内に収納された際に開口を塞ぐ前面板と、底板に連結部を回動中心として倒立可能に取り付けられた側板および背面板とから構成されているものである。
【０００７】
また、この発明の第２の発明に係る小型低圧配電盤は、上記第１の発明において、筐体の側面および裏面の少なくとも一面に切り欠きが形成され、台車部が筐体内に収納された際に、台車部の側板および背面板により切り欠きが塞口されるように構成されているものである。
【０００８】
また、この発明の第３の発明に係る小型低圧配電盤は、上記第１の発明において、筐体の裏面に切り欠きが形成され、台車部が筐体内に収納された際に、台車部の背面板により切り欠きが塞口され、かつ、背面板に組み付けられた収納部品である冷却装置の一部が切り欠きから外部に突出できるように構成されているものである。
【０００９】
また、この発明の第４の発明に係る小型低圧配電盤は、上記第１乃至第３の発明のいずれかの発明において、前面板が底板に開閉可能に取り付けられているものである。
【００１０】
【作用】
この発明の第１の発明においては、台車部は筐体から引き出して、側板および背面板を連結部を回動中心として外方に倒すことにより、底板、側板および背面板が平面状に展開される。そこで、収納部品を組み付ける際には、筐体１の狭い前部の開口から手や顔を入れることなく、上方から平面状に展開された底板、側板および背面板上に簡易に収納部品を組み付けられ、さらに部品間に配線を簡易に施すことができる。また、保守点検の際には、筐体１の狭い前部の開口から手や顔を入れることなく、収納部品の重なり合いもなく、上方から平面状に展開された底板、側板および背面板上に組み付けられた収納部品を簡易に、かつ、他の収納部品に触れことなく保守点検がなされる。
【００１１】
また、この発明の第２の発明においては、台車部の構成要素が筐体の一部を兼ね、装置の軽量化が図られる。
【００１２】
また、この発明の第３の発明においては、台車部の構成要素が筐体の一部を兼ね、装置の軽量化が図られる。また、背面板に組み付けられた収納部品である冷却装置の一部が切り欠きから外部に突出できるように構成されているので、冷却装置の一部を筐体外に突出でき、冷却効率が高められる。
【００１３】
また、この発明の第４の発明においては、前面板が底板に開閉可能に取り付けられているので、台車部を筐体内に収納した状態で、前面板を開け放ち、筐体の前部の開口から簡易な保守点検が可能となる。
【００１４】
【実施例】
以下、この発明の実施例を図について説明する。
実施例１．
図１はこの発明の実施例１に係る小型低圧配電盤における台車部の引き出し状態を示す斜視図、図２はこの発明の実施例１に係る小形低圧配電盤の台車部を示す平面図、図３はこの発明の実施例１に係る小形低圧配電盤の台車部を示す展開平面図であり、図において図９に示した従来の小形低圧配電盤と同一または相当部分には同一符号を付し、その説明を省略する。
図において、４は筐体１の相対する内側面にそれぞれ設けられた案内溝、５は案内溝４に案内されて筐体１に引き出し自在に構成された台車部であり、この台車部５は、底板６、前面板７、一対の側板８および背面板９から上部に開口する箱型に構成されている。そして、底板６の両側端面には、それぞれ前後にローラ１０が回転自在に配設され、該ローラ１０が案内溝４に係合して台車部５の出し入れ動作をスムーズにしている。また、前面板７は底板６に一体に取り付けられ、台車部５を筐体１内に挿入した際に前部開口１ａを塞ぎ、筐体１の扉として機能する。さらに、側板８および背面板９はそれぞれ連結部材としての蝶番１１を回動中心として底板６に倒立可能に取り付けられている。１２は側板８および背面板９が底板６上にコ字状に立てられた際に側板８と背面板９とを連結するＬ型金具である。
【００１５】
このように構成された小型低圧配電盤に収納部品３を組み付けるには、まず台車部５を筐体１から引き出す。そして、Ｌ型金具１２の取付ボルト１３を取り外し、側板８および背面板９を蝶番１１を回動中心として外側に倒し平面状に展開する。そこで、底板６、前面板７、側板８およぼ背面板９にそれぞれ収納部品３を取り付け、さらに収納部品３間の配線を行い、図３に示すように、収納部品３の組み付けを行う。
ついで、側板８および背面板９を蝶番１１を回動中心として起立させ、背面板９の上部内縁に取り付けられているＬ型金具１２に取付ボルト１３を通し、側板８のネジ穴８ａに締着して側板８と背面板９とを連結し、図２に示すように、台車部５を組み上げる。
その後、ローラ１０を案内溝４内に嵌め込み、前面板７を押して、台車部５を筐体１内に収納し、小型低圧配電盤が完成する。
【００１６】
ついで、保守点検する場合には、台車部５を筐体１から引き出す。そして、取付ボルト１３を取り外し、側板８および背面板９を平面状に展開して収納部品３の保守点検を行う。その後、側板８および背面板９を起立させ、Ｌ型金具１２を介して取付ボルト１３を締着し、台車部５を筐体１内に収納して、保守点検作業が完了する。
【００１７】
このように、この実施例１によれば、台車部５を構成する側板８および背面板９が底板６に蝶番１１を回動中心として倒立可能に取り付けられているので、収納部品３を組み付ける際に、側板８および背面板９を平面状に展開でき、作業スペースが広くなり、収納部品３の重なり合いもなくなる。そこで、底板６、前面板７、側板８および背面板９に収納部品３を支障なく組み付けられ、収納部品３間の配線も容易にでき、収納部品３の収納点数を減らすことなく、生産性を高めることができる。
また、側板８および背面板９を平面状に展開して保守点検できるので、収納部品３の重なり合いもなくなり、従来装置のように、他の収納部品３に触れたり、障害となる他の収納部品３を一旦取り外す必要もなく、保守点検の作業効率を著しく向上させることができる。
【００１８】
実施例２．
上記実施例１では、一対の側板８，８および背面板９のそれぞれが蝶番１１を回動中心として底板６に倒立可能に取り付けられているものとしているが、この実施例２では、図４に示すように、一方の側板８と背面板９とが蝶番１１を回動中心として底板６に倒立可能に取り付けられ、他方の側板８は背面板９に蝶番１１を回動中心として開閉可能に取り付けられている。ここで、他方の側板８は底板６上にコ字状に立てられた際に底板６に取り付けられたＬ型金具１２にネジ穴８ａに螺着された取付ボルト１３により締着固定される。なお、他の構成は、上記実施例１と同様に構成されている。
【００１９】
この実施例２では、台車部５を筐体１から引き出した状態で、取付ボルト１３を取り外し、一方の側板８と背面板９との連結、および他方の側板８と底板６との連結をそれぞれ解除する。そして、一方の側板８を蝶番１１を回動中心として外方に倒す。ついで、他方の側板８を蝶番１１を回動中心として背面板９と同一面となるように開き、さらに背面板９を蝶番１１を回動中心として外方に倒し、図５に示すように、側板８および背面板９が平面状に展開される。
そこで、この実施例２においても、上記実施例１と同様の効果が得られる。
【００２０】
実施例３．
この実施例３では、図６に示すように、底板６の前縁部の一端に支持片１４を配設し、前面板７の内面に突設した突出片１５を該支持片１４に軸１６によって回転可能に支持して、前面板７が底板６に開閉可能に取り付けられている。なお、他の構成は、上記実施例１と同様に構成されている。
【００２１】
この実施例３によれば、上記実施例１と同様に、側板８および背面板９が底板６に平面状に展開可能に取り付けられているので、上記実施例１と同様の効果が得られる。
また、この実施例３によれば、前面板７が底板６に開閉可能に取り付けられているので、簡単な保守点検作業の際には、台車部５を筐体１内に収納した状態で前面板７を開け放ち、筐体１の前部開口１ａから保守点検できるようになり、保守点検性を一層向上させることができる。
【００２２】
なお、上記実施例３では、前面板７が底板６に片持ちの支持部で回転可能に支持されているものとしているが、前面板７の支持構造はこれに限定されるものではなく、前面板７が前部開口１ａを開閉できるように底板６に装着されていればよい。
【００２３】
実施例４．
この実施例４では、図７に示すように、一対のガイドレール１７が筐体１の底部に台車部５の出し入れ方向に平行に延設され、台車部５の底板６の裏面側にガイドレール１７上を走行する車輪（図示せず）が設けられ、さらに筐体１の側面部に切り欠き１８が設けられている。なお、他の構成は、上記実施例１と同様に構成されている。
【００２４】
この実施例４によれば、上記実施例１と同様に、側板８および背面板９が底板６に平面状に展開可能に取り付けられているので、上記実施例１と同様の効果が得られる。
また、この実施例４では、底板６の裏面に設けられた車輪がガイドレール１７上を走行して台車部５の出し入れが行われるので、上記実施例１のように、底板６の側端面に突設されたローラ１０や筐体１の内側面に設けられた案内溝４が不要となる。そして、底板６を筐体１の内側面まで拡張し、側板８を底板６の縁部に取り付けることにより、台車部５を筐体１内に収納した際に、側板８が切り欠き１８を塞いで筐体１の一部を兼ねるようになる。そこで、筐体１に切り欠き１８を設けた分、小型低圧配電盤の重量を軽減することができる。
【００２５】
実施例５．
この実施例５では、図８に示すように、筐体１の後面部に切り欠き１９を設け、底板６を筐体１の背面側まで拡張し、背面板９を底板６の縁部に取り付け、台車部５を筐体１内に収納した際に、背面板９が切り欠き１９を塞いで筐体１の一部を兼ねるようにしている。さらに、収納部品３の冷却装置２０を切り欠き１９から外方に突き出すように背面板９に組み付けている。なお、他の構成は、上記実施例４と同様に構成されている。
【００２６】
この実施例５によれば、上記実施例４と同様に、側板８および背面板９が底板６に平面状に展開可能に取り付けられ、背面板９が切り欠き１９を塞いで筐体１の一部を兼ねるようにしているので、上記実施例４と同様の効果が得られる。
また、この実施例５では、冷却装置２０を切り欠き１９から外方に突き出しているので、冷却効率を向上させることができる。
【００２７】
【発明の効果】
この発明は、以上のように構成されているので、以下に記載されるような効果を奏する。
【００２８】
この発明の第１の発明によれば、台車部が、底板と、底板の前部に取り付けられて筐体内に収納された際に開口を塞ぐ前面板と、底板に連結部を回動中心として倒立可能に取り付けられた側板および背面板とから構成されているので、台車部を筐体から引き出した状態で台車部の側面および背面板を平面状に展開でき、収納部品の組み付けおよび保守点検の作業性が高められ、収納部品の収納点数を減らさず、生産性および保守点検性に優れた小型低圧配電盤が得られる。
【００２９】
また、この発明の第２の発明によれば、上記第１の発明において、筐体の側面および裏面の少なくとも一面に切り欠きが形成され、台車部が筐体内に収納された際に、台車部の側板および背面板により切り欠きが塞口されるように構成されているので、台車部の構成要素が筐体の一部を兼ね、その分装置の軽量化が図られる。
【００３０】
また、この発明の第３の発明によれば、上記第１の発明において、筐体の裏面に切り欠きが形成され、台車部が筐体内に収納された際に、台車部の背面板により切り欠きが塞口され、かつ、背面板に組み付けられた収納部品である冷却装置の一部が切り欠きから外部に突出できるように構成されているので、台車部の構成要素が筐体の一部を兼ね、その分装置の軽量化が図られるとともに、収納部品として冷却装置を用いる場合、その冷却効率を高めることができる。
【００３１】
また、この発明の第４の発明によれば、上記第１乃至第３の発明のいずれかの発明において、前面板が底板に開閉可能に取り付けられているので、台車部を筐体に収納した状態で前面板を開けることにより、筐体の前部の開口から簡易な保守点検が行え、保守点検性を一層向上させることができる。
【図面の簡単な説明】
【図１】この発明の実施例１に係る小型低圧配電盤における台車部の引き出し状態を示す斜視図である。
【図２】この発明の実施例１に係る小形低圧配電盤の台車部を示す平面図である。
【図３】この発明の実施例１に係る小形低圧配電盤の台車部を示す展開平面図である。
【図４】この発明の実施例２に係る小形低圧配電盤の台車部を示す平面図である。
【図５】この発明の実施例２に係る小形低圧配電盤の台車部を示す展開平面図である。
【図６】この発明の実施例３に係る小型低圧配電盤の前面板開放状態を示す斜視図である。
【図７】この発明の実施例４に係る小型低圧配電盤における台車部の引き出し状態を示す斜視図である。
【図８】この発明の実施例５に係る小型低圧配電盤を示す一部破断上面図である。
【図９】従来の小型低圧配電盤の扉開放状態を示す斜視図である。
【符号の説明】
１筐体、１ａ開口、３収納部品、５台車部、６底板、７前面板、８側板、９背面板、１１蝶番（連結部）、１８、１９切り欠き、２０冷却装置（収納部品）。[0001]
[Industrial application fields]
The present invention relates to a small low-voltage switchboard used for power distribution or control of a generator or the like.
[0002]
[Prior art]
FIG. 9 is a perspective view showing a conventional small-sized low-voltage switchboard. In FIG. 9, 1 is a box-shaped housing having an opening 1a on the front surface, 2 is a door attached to the front surface of the housing 1 so as to be opened and closed, and 3 is a housing. It is a storage component that is attached to the bottom surface or the inner wall surface of the body 1 or the back surface of the door 2 and is stored in the housing 1. Examples of the storage component 3 include a circuit breaker, various control circuits, a charging device, and an auxiliary device. A control circuit, an alarm circuit, a measurement circuit, an automatic voltage adjustment circuit, etc.
[0003]
The small low-voltage switchboard configured in this way is usually configured as an integrated device together with electrical parts such as a mechanical part and a generator, and is used extensively when housed in an enclosure. Accompany. Therefore, it is necessary to realize the functions and performances required under the limited housing 1 conditions, and to consider productivity and maintainability.
In order to assemble the storage component 3 to this small low-voltage switchboard, the door 2 is opened wide, and the storage component 3 is attached to the bottom surface or inner wall surface of the housing 1 or the back surface of the door 2 from the front opening 1 a of the housing 1. At this time, considering the efficient arrangement of the storage components 3 in the space in the housing 1, the storage density of the components is increased.
Further, during the maintenance inspection, the maintenance inspection work is performed from the front opening 1a of the housing 1 by opening the door 2 open.
[0004]
[Problems to be solved by the invention]
As described above, the conventional small-sized low-voltage switchboard is configured to perform assembly or maintenance inspection of the storage component 3 from the front opening 1a of the housing 1.
Therefore, when the storage component 3 is assembled, it is difficult for a hand or a face to enter from the front opening 1a of the housing 1, the storage component 3 is difficult to be assembled with high density on the bottom surface, side surface and back surface of the housing 1, and the wiring route As a result, it becomes difficult to ensure the workability and workability is deteriorated.
Further, when carrying out maintenance and inspection, the overlapping of the storage components 3 is unavoidable, and even if an attempt is made to check the storage components 3 in the back, there is a risk that the storage components 3 in front will be touched. In order to avoid such a risk, the front storage component 3 can be temporarily removed and the back storage component 3 can be inspected, but the working efficiency will be significantly reduced.
As described above, the conventional small-sized low-voltage switchboard has a problem that the productivity and the maintenance / inspection are deteriorated.
[0005]
The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a small low-voltage switchboard that can remarkably improve productivity and maintenance and inspection without reducing the number of storage parts. And
[0006]
[Means for Solving the Problems]
A small low-voltage switchboard according to a first aspect of the present invention includes a box-shaped casing having an opening at the front, and a box-shaped carriage unit configured to be freely inserted into and removed from the opening and assembled with storage parts. In a small low-voltage switchboard equipped with a trolley, the cart can be inverted with the bottom plate, the front plate that is attached to the front of the bottom plate and closes the opening when housed in the housing, and the bottom plate with the connecting part as the rotation center It is comprised from the attached side plate and back plate.
[0007]
The small low-voltage switchboard according to the second invention of the present invention is the above-described first invention, wherein a cutout is formed in at least one of the side surface and the back surface of the housing, and the carriage unit is housed in the housing. The cutout is closed by the side plate and the back plate of the carriage unit.
[0008]
The small low-voltage switchboard according to the third aspect of the present invention is the above-mentioned first aspect, wherein a notch is formed on the rear surface of the housing, and the back of the cart portion is stored when the cart portion is stored in the housing. The notch is closed by the face plate , and a part of the cooling device , which is a storage component assembled to the back plate, can be projected to the outside from the notch.
[0009]
According to a fourth aspect of the present invention, there is provided a small-sized low-voltage switchboard in which the front plate is attached to the bottom plate so as to be opened and closed in any one of the first to third inventions.
[0010]
[Action]
In the first aspect of the present invention, the bottom plate, the side plate, and the back plate are developed in a flat shape by pulling out the carriage unit from the housing and tilting the side plate and the back plate outward with the connecting portion as the rotation center. The Therefore, when assembling the storage components, the storage components are simply assembled on the bottom plate, the side plate, and the back plate that are flatly developed from above without putting a hand or face through the narrow front opening of the housing 1. In addition, wiring can be easily provided between components. Also, during maintenance and inspection, do not put a hand or face through the narrow front opening of the housing 1, there is no overlap of storage parts, and it is placed on the bottom plate, side plate and back plate that are flatly developed from above. Maintenance inspection is performed on the assembled storage parts easily and without touching other storage parts.
[0011]
In the second invention of the present invention, the component of the carriage unit also serves as a part of the housing, and the weight of the apparatus can be reduced.
[0012]
In the third aspect of the present invention, the component of the carriage unit also serves as a part of the housing, so that the weight of the apparatus can be reduced. In addition, since a part of the cooling device , which is a storage component assembled to the back plate , is configured to protrude outside from the notch, a part of the cooling device can protrude outside the housing, and the cooling efficiency is improved. .
[0013]
In the fourth aspect of the present invention, since the front plate is attached to the bottom plate so as to be openable and closable, the front plate is opened and opened from the opening at the front of the housing in a state where the carriage is housed in the housing. Simple maintenance inspection is possible.
[0014]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
Example 1.
1 is a perspective view showing a drawer state of a carriage part in a small low voltage distribution board according to Embodiment 1 of the present invention, FIG. 2 is a plan view showing the carriage part of the small low voltage distribution board according to Embodiment 1 of the present invention, and FIG. It is an expanded plan view showing a cart part of a small low voltage distribution board according to Embodiment 1 of the present invention, in which the same or equivalent parts as in the conventional small low voltage distribution board shown in FIG. Omitted.
In the figure, 4 is a guide groove provided on each of the opposing inner side surfaces of the housing 1, and 5 is a cart portion that is guided by the guide groove 4 and can be pulled out to the housing 1. The bottom plate 6, the front plate 7, the pair of side plates 8 and the back plate 9 are configured in a box shape that opens upward. Rollers 10 are rotatably disposed on both side end surfaces of the bottom plate 6 so that the rollers 10 are engaged with the guide grooves 4 to smoothly move the carriage unit 5 in and out. The front plate 7 is integrally attached to the bottom plate 6, and closes the front opening 1 a when the carriage unit 5 is inserted into the housing 1 and functions as a door of the housing 1. Further, the side plate 8 and the back plate 9 are attached to the bottom plate 6 so that they can be inverted with the hinge 11 as a connecting member as the center of rotation. Reference numeral 12 denotes an L-shaped metal fitting for connecting the side plate 8 and the back plate 9 when the side plate 8 and the back plate 9 are erected on the bottom plate 6.
[0015]
In order to attach the storage component 3 to the small low-voltage switchboard configured as described above, the cart unit 5 is first pulled out of the housing 1. Then, the mounting bolts 13 of the L-shaped metal fitting 12 are removed, and the side plate 8 and the back plate 9 are moved outward with the hinge 11 as the center of rotation, and developed in a planar shape. Therefore, the storage component 3 is attached to the bottom plate 6, the front plate 7, the side plate 8, and the back plate 9, and wiring between the storage components 3 is performed, and the storage component 3 is assembled as shown in FIG.
Next, the side plate 8 and the back plate 9 are erected with the hinge 11 as the center of rotation, and the mounting bolt 13 is passed through the L-shaped metal fitting 12 attached to the upper inner edge of the back plate 9 and fastened to the screw hole 8a of the side plate 8. Then, the side plate 8 and the back plate 9 are connected, and the cart unit 5 is assembled as shown in FIG.
Thereafter, the roller 10 is fitted into the guide groove 4 and the front plate 7 is pushed to accommodate the carriage unit 5 in the housing 1, thereby completing the small low voltage switchboard.
[0016]
Next, when carrying out maintenance inspection, the carriage unit 5 is pulled out from the housing 1. Then, the mounting bolts 13 are removed, and the side plate 8 and the back plate 9 are developed in a flat shape to perform maintenance inspection of the storage component 3. Thereafter, the side plate 8 and the back plate 9 are erected, the mounting bolts 13 are fastened through the L-shaped metal fittings 12, and the cart unit 5 is housed in the housing 1 to complete the maintenance and inspection work.
[0017]
As described above, according to the first embodiment, the side plate 8 and the back plate 9 constituting the carriage unit 5 are attached to the bottom plate 6 so as to be able to be inverted around the hinge 11 as a rotation center. In addition, the side plate 8 and the back plate 9 can be developed in a planar shape, the work space is widened, and the storage components 3 are not overlapped. Therefore, the storage component 3 can be assembled to the bottom plate 6, the front plate 7, the side plate 8 and the back plate 9 without hindrance, wiring between the storage components 3 can be easily performed, and productivity can be improved without reducing the number of storage components 3. Can be increased.
Further, since the side plate 8 and the back plate 9 can be developed and maintained in a flat shape, the storage components 3 are not overlapped, and other storage components that touch or interfere with other storage components 3 as in the conventional apparatus. It is not necessary to remove 3 once, and the work efficiency of maintenance inspection can be significantly improved.
[0018]
Example 2
In the first embodiment, each of the pair of side plates 8 and 8 and the rear plate 9 is attached to the bottom plate 6 with the hinge 11 as a rotation center so as to be able to be inverted. In this second embodiment, FIG. As shown, one side plate 8 and the back plate 9 are attached to the bottom plate 6 so that they can be inverted with the hinge 11 as a rotation center, and the other side plate 8 is attached to the back plate 9 so that it can be opened and closed with the hinge 11 as a rotation center. It has been. Here, when the other side plate 8 is erected on the bottom plate 6 in a U-shape, the other side plate 8 is fastened and fixed to the L-shaped metal fitting 12 attached to the bottom plate 6 by mounting bolts 13 screwed into the screw holes 8a. Other configurations are the same as those in the first embodiment.
[0019]
In the second embodiment, the mounting bolt 13 is removed in a state in which the carriage unit 5 is pulled out from the housing 1, and the connection between the one side plate 8 and the back plate 9 and the connection between the other side plate 8 and the bottom plate 6 are respectively performed. To release. Then, the one side plate 8 is tilted outward with the hinge 11 as the center of rotation. Next, the other side plate 8 is opened so as to be flush with the back plate 9 with the hinge 11 as the center of rotation, and the back plate 9 is further tilted outward with the hinge 11 as the center of rotation, as shown in FIG. The side plate 8 and the back plate 9 are developed in a planar shape.
Therefore, also in the second embodiment, the same effect as in the first embodiment can be obtained.
[0020]
Example 3 FIG.
In the third embodiment, as shown in FIG. 6, a support piece 14 is disposed at one end of the front edge of the bottom plate 6, and a protruding piece 15 protruding from the inner surface of the front plate 7 is attached to the support piece 14 with a shaft 16. The front plate 7 is attached to the bottom plate 6 so that it can be opened and closed. Other configurations are the same as those in the first embodiment.
[0021]
According to the third embodiment, as in the first embodiment, since the side plate 8 and the back plate 9 are attached to the bottom plate 6 so as to be deployable in a planar shape, the same effects as in the first embodiment can be obtained.
Further, according to the third embodiment, the front plate 7 is attached to the bottom plate 6 so as to be openable and closable. The face plate 7 can be opened and maintenance inspection can be performed from the front opening 1a of the housing 1, so that the maintenance inspection performance can be further improved.
[0022]
In the third embodiment, the front plate 7 is rotatably supported on the bottom plate 6 by a cantilevered support. However, the support structure of the front plate 7 is not limited to this, It is only necessary that the face plate 7 is attached to the bottom plate 6 so as to open and close the front opening 1a.
[0023]
Example 4
In the fourth embodiment, as shown in FIG. 7, a pair of guide rails 17 are extended in parallel with the direction of the carriage unit 5 at the bottom of the housing 1, and the guide rails are provided on the back side of the bottom plate 6 of the carriage unit 5. Wheels (not shown) that run on 17 are provided, and a notch 18 is provided on the side surface of the housing 1. Other configurations are the same as those in the first embodiment.
[0024]
According to the fourth embodiment, as in the first embodiment, the side plate 8 and the back plate 9 are attached to the bottom plate 6 so as to be deployable in a flat shape, so that the same effect as in the first embodiment can be obtained.
Moreover, in this Example 4, since the wheel provided on the back surface of the bottom plate 6 travels on the guide rail 17 and the carriage unit 5 is put in and out, the side plate of the bottom plate 6 is placed on the side end surface as in the above Example 1. The protruding roller 10 and the guide groove 4 provided on the inner surface of the housing 1 are not necessary. Then, by extending the bottom plate 6 to the inner surface of the housing 1 and attaching the side plate 8 to the edge of the bottom plate 6, the side plate 8 closes the notch 18 when the cart unit 5 is stored in the housing 1. Thus, it also serves as a part of the housing 1. Thus, the weight of the small low-voltage switchboard can be reduced by providing the notch 18 in the housing 1.
[0025]
Example 5 FIG.
In the fifth embodiment, as shown in FIG. 8, a notch 19 is provided in the rear surface portion of the housing 1, the bottom plate 6 is extended to the back side of the housing 1, and the back plate 9 is attached to the edge of the bottom plate 6. When the cart unit 5 is housed in the housing 1, the back plate 9 closes the notch 19 and serves as a part of the housing 1. Furthermore, the cooling device 20 of the storage component 3 is assembled to the back plate 9 so as to protrude outward from the notch 19. Other configurations are the same as those in the fourth embodiment.
[0026]
According to the fifth embodiment, as in the fourth embodiment, the side plate 8 and the back plate 9 are attached to the bottom plate 6 so as to be flatly developed, and the back plate 9 closes the notch 19 and closes the housing 1. Since it serves also as a part, the same effect as the said Example 4 is acquired.
Moreover, in this Example 5, since the cooling device 20 protrudes outward from the notch 19, the cooling efficiency can be improved.
[0027]
【The invention's effect】
Since this invention is comprised as mentioned above, there exists an effect as described below.
[0028]
According to the first aspect of the present invention, the carriage unit includes the bottom plate, the front plate that closes the opening when the carriage unit is attached to the front portion of the bottom plate and accommodated in the housing, and the connecting portion of the bottom plate is the rotation center. Since it is composed of side plates and back plates that are attached in an inverted manner, the side and back plates of the cart can be deployed in a flat shape with the cart pulled out from the housing, and assembly and maintenance inspection of the storage parts can be performed. Workability is improved, and the small number of low voltage switchboards with excellent productivity and maintenance and inspection can be obtained without reducing the number of storage parts.
[0029]
According to the second invention of the present invention, in the first invention, when the notch is formed in at least one of the side surface and the back surface of the housing, and the cart portion is stored in the housing, the cart portion Since the cutout is closed by the side plate and the back plate, the components of the carriage part also serve as a part of the casing, and the weight of the device can be reduced accordingly.
[0030]
According to a third aspect of the present invention, in the first aspect, when the notch is formed on the back surface of the housing and the cart portion is housed in the housing, it is cut by the back plate of the cart portion. Since the notch is closed and a part of the cooling device , which is a storage component assembled to the back plate, can be projected to the outside from the notch, the components of the carriage part are part of the housing In addition, the weight of the device can be reduced correspondingly, and when a cooling device is used as a storage component, the cooling efficiency can be increased.
[0031]
According to the fourth invention of the present invention, in any one of the first to third inventions, the front plate is attached to the bottom plate so as to be openable and closable. By opening the front plate in the state, simple maintenance inspection can be performed from the opening at the front of the housing, and the maintenance inspection performance can be further improved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a carriage unit is pulled out in a small low-voltage switchboard according to Embodiment 1 of the present invention.
FIG. 2 is a plan view showing a carriage part of a small low voltage switchboard according to Embodiment 1 of the present invention.
FIG. 3 is a developed plan view showing a carriage part of a small low voltage switchboard according to Embodiment 1 of the present invention.
FIG. 4 is a plan view showing a carriage section of a small low voltage switchboard according to Embodiment 2 of the present invention.
FIG. 5 is a developed plan view showing a carriage portion of a small low voltage switchboard according to Embodiment 2 of the present invention.
FIG. 6 is a perspective view showing an open state of a front plate of a small low voltage switchboard according to Embodiment 3 of the present invention.
FIG. 7 is a perspective view showing a state in which a carriage unit is pulled out in a small low voltage switchboard according to Embodiment 4 of the present invention.
FIG. 8 is a partially broken top view showing a small low voltage switchboard according to Embodiment 5 of the present invention.
FIG. 9 is a perspective view showing a door open state of a conventional small low voltage switchboard.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Housing | casing, 1a opening, 3 storage components, 5 cart part, 6 bottom plate, 7 front plate, 8 side plate, 9 back plate, 11 hinge (connection part), 18, 19 notch, 20 cooling device (storage component).

Claims

In a small low-voltage distribution board comprising a box-shaped housing having an opening at the front, and a box-shaped carriage unit that is configured to be freely inserted into and withdrawn from the housing through the opening, and a storage part is assembled,
The carriage is attached to a bottom plate, a front plate that closes the opening when the carriage is attached to the front portion of the bottom plate and housed in the housing, and is attached to the bottom plate so as to be able to be inverted with a connecting portion as a rotation center. A small low-voltage switchboard comprising a side plate and a back plate.

A notch is formed in at least one of the side surface and the back surface of the housing, and the notch is configured to be closed by a side plate and a back plate of the cart portion when the cart portion is stored in the housing. The small-sized low voltage switchboard according to claim 1 characterized by things.

A storage part in which a notch is formed on the back surface of the housing, and when the cart portion is stored in the housing, the notch is closed by the back plate of the cart portion and is assembled to the back plate. The small-sized low voltage switchboard according to claim 1, wherein a part of the cooling device is configured to protrude outside from the notch.

The small low-voltage switchboard according to any one of claims 1 to 3, wherein the front plate is attached to the bottom plate so as to be openable and closable.