JP6690978B2

JP6690978B2 - System ceiling

Info

Publication number: JP6690978B2
Application number: JP2016069380A
Authority: JP
Inventors: 宗明大原; 実記森山; 孝博山崎; 康浩杉元
Original assignee: Takenaka Corp
Current assignee: Takenaka Corp
Priority date: 2016-03-30
Filing date: 2016-03-30
Publication date: 2020-04-28
Anticipated expiration: 2036-03-30
Also published as: JP2017179918A

Description

本発明は、躯体に吊下げ支持された多数のバー材で構成される天井下地に、天井面を形成する多数の天井材を取付け、前記天井面の所定部位に、分電盤を埋め込み状態で設置し、この分電盤の下側面で前記天井面の一部を構成してあるシステム天井に関する。 The present invention attaches a large number of ceiling materials forming a ceiling surface to a ceiling base composed of a large number of bar members suspended and supported by a skeleton, and a distribution board is embedded in a predetermined portion of the ceiling surface. The present invention relates to a system ceiling which is installed and constitutes a part of the ceiling surface on the lower surface of the distribution board.

システム天井の天井面に分電盤を埋め込み状態で設置するにあたって、従来では、多数のバー材を躯体に吊下げ支持させるシステム天井の吊下げ構造とは別に、躯体の分電盤配置相当箇所に、分電盤のケーシングを吊下げ支持する複数本の専用のアンカーボルトを垂設し、この垂設されたアンカーボルトに、分電盤のケーシングに設けた複数の取付け部をナット等で締め付け固定している（例えば、特許文献１参照）。 When installing a distribution board embedded in the ceiling surface of the system ceiling, conventionally, in addition to the suspension structure of the system ceiling in which a large number of bar members are suspended and supported on the structure, the distribution board of the structure should be installed at the equivalent position. , A plurality of dedicated anchor bolts for suspending and supporting the casing of the distribution board are laid vertically, and the mounting bolts provided on the casing of the distribution board are tightened and fixed to the hung anchor bolts. (For example, see Patent Document 1).

特開２０００−１３４７２５号公報JP, 2000-134725, A

上述のように、システム天井の天井面に分電盤を埋め込み状態で設置するので、例えば、オフィスビルの共用部や執務室などの電気幹線用パイプスペース（ＥＰＳ）や壁面に分電盤を設置する場合に比較して、家具配置等の使い勝手に制約を与えず、且つ、オフィスのレンタブル比及び天井面の意匠性を損なうことなく分電盤を配置することができる。反面、多数のバー材を躯体に吊下げ支持させるシステム天井の吊下げ構造とは別に、躯体の分電盤配置相当箇所に複数本のアンカーボルトからなる専用の吊下げ構造を構築する必要があるため、分電盤の取付け工事が大掛かりになり、コストが高騰化する不都合がある。
しかも、執務空間のレイアウト変更に伴って分電盤の設置位置を変更する必要が生じた場合でも、分電盤の設置位置変更工事が大掛かりになる不都合がある。 As described above, since the distribution board is installed in the ceiling surface of the system ceiling, for example, the distribution board is installed in the electric main pipe space (EPS) or the wall surface in the common area of the office building or the office. In comparison with the above case, the distribution board can be arranged without restricting usability such as furniture arrangement, and without impairing the rentable ratio of the office and the design of the ceiling surface. On the other hand, in addition to the system ceiling suspension structure that suspends and supports a large number of bar materials in the frame, it is necessary to build a dedicated suspension structure consisting of multiple anchor bolts at the location equivalent to the distribution board layout of the frame. Therefore, there is a disadvantage that the installation work of the distribution board becomes large and the cost rises.
In addition, even if it is necessary to change the installation position of the distribution board due to the layout change of the work space, there is the inconvenience that the installation position of the distribution board is changed.

この実情に鑑み、本発明の主たる課題は、システム天井の吊下げ構造を利用した合理的な改良により、使い勝手に制約を与えず、且つ、オフィスのレンタブル比及び天井面の意匠性を損なうことなく、分電盤を適切な設置場所に能率良く容易に設置することができ、さらに、分電盤の設置場所の自由性と配線等の作業性を向上することのできるシステム天井を提供する点にある。 In view of this situation, the main problem of the present invention is that the rational improvement using the system ceiling suspension structure does not limit usability and does not impair the rentable ratio of the office and the design of the ceiling surface. In order to provide a system ceiling that can efficiently and easily install the distribution board at an appropriate installation location and further improve workability such as wiring and the freedom of the installation location of the distribution board. is there.

躯体に吊下げ支持された多数のバー材で構成される天井下地に、天井面を形成する多数の天井材を取付け、前記天井面の所定部位に、分電盤を埋め込み状態で設置し、この分電盤の下側面で前記天井面の一部を構成してあるシステム天井であって、
前記分電盤を、前記天井下地の平行なバー材間に亘って荷重を支持させる状態で載架してある。 On the ceiling base composed of a large number of bar members suspended and supported by the frame , a large number of ceiling materials that form the ceiling surface are attached, and a distribution board is installed in a predetermined portion of the ceiling surface in an embedded state, A system ceiling in which a part of the ceiling surface is constituted by the lower surface of the distribution board,
The distribution board, Ru rests Citea state for supporting a load over between parallel bar member of the ceiling foundation.

上記構成によれば、分電盤をシステム天井の天井面の所定部位に埋め込み状態で設置することにより、例えば、分電盤を共用部や執務室の電気幹線用パイプスペース（ＥＰＳ）や壁面に設置する場合に比較して、家具配置等の使い勝手に制約を与えず、且つ、オフィスのレンタブル比及び天井面の意匠性を損なうことなく分電盤を配置することができる。
特に、本発明では、分電盤をシステム天井のバー材間に亘って荷重を支持させる状態で載架するので、システム天井のバー材間の何れの位置にも分電盤を配置することができるとともに、システム天井の吊下げ構造として構築されているバー材間に分電盤を載架状態で支持させるだけで済む。
それ故に、システム天井の天井面の所定部位に分電盤を能率良く容易に設置することができるとともに、分電盤の設置場所の自在性も高めることができる。さらに、システム天井の天井下地に照明器具等の他の天井設置電気機器が取付けられている場合には、略同じ高さレベルに配置される他の天井設置電気機器に対する配線等の作業性も同時に向上することができる。
また、配電盤の二次側での配線長さの減少によってローコスト化を図ることが可能で、特に、小規模テナントを想定した貸ビルでは高い効果が期待できる。 According to the above configuration, the distribution board is installed in a predetermined portion of the ceiling surface of the system ceiling in an embedded state, so that the distribution board can be installed in, for example, a common space or an electric trunk pipe space (EPS) in a work room or a wall surface. Compared with the case of installation, the distribution board can be arranged without restricting usability such as furniture arrangement, and without impairing the rentable ratio of the office and the design of the ceiling surface.
Particularly, in the present invention, since the distribution board is mounted in a state of supporting the load between the bar members of the system ceiling, the distribution board can be arranged at any position between the bar members of the system ceiling. In addition to that, it is only necessary to support the distribution board in the mounted state between the bar materials constructed as the suspension structure of the system ceiling.
Therefore, the distribution board can be efficiently and easily installed at a predetermined portion of the ceiling surface of the system ceiling, and the flexibility of the installation location of the distribution board can be enhanced. Furthermore, when other ceiling-mounted electric equipment such as lighting equipment is attached to the ceiling base of the system ceiling, workability such as wiring for other ceiling-mounted electric equipment arranged at approximately the same height level is also achieved. Can be improved.
In addition, it is possible to reduce costs by reducing the wiring length on the secondary side of the switchboard, and in particular, a high effect can be expected in a rental building assuming a small tenant.

前記天井下地は、前記バー材をグリッド状に枠組みして構成され、前記分電盤の長手方向幅は前記天井下地のグリッド幅に構成され、且つ、前記分電盤の短手方向幅は前記天井下地のグリッド幅よりも小に構成されている。 Before SL ceiling foundation is constituted by a framework of the bar member in a grid, the longitudinal width of the distribution board is constructed in a grid width of the ceiling foundation, and, the breadth of the distribution board is that it is configured to be smaller than the grid width of the ceiling foundation.

上記構成によれば、分電盤の長手方向幅が天井下地のグリッド幅に構成されているので、天井下地に区画形成されている何れのグリッドに対しても、そのグリッドを構成する両バー材間に分電盤を載架することができる。しかも、分電盤の短手方向幅は天井下地のグリッド幅よりも小に構成されているので、分電盤の軽量化を図ることができる。
それ故に、天井下地の何れのグリッドに対しても分電盤を能率良く容易に取付けることができとともに、分電盤の取付け作業性と設置場所の自在性をより向上することができる。 According to the above configuration, since the width in the longitudinal direction of the distribution board is configured to be the grid width of the ceiling base material, for both grids partitioned and formed on the ceiling base material, both bar members forming the grid are formed. A distribution board can be mounted between them. Moreover, since the width of the distribution board in the widthwise direction is smaller than the grid width of the ceiling base, the weight of the distribution board can be reduced.
Therefore, the distribution board can be efficiently and easily attached to any grid on the ceiling base, and the workability of installing the distribution board and the flexibility of the installation location can be further improved.

前記分電盤には、前記両バー材に対して上方から係脱自在な係止部が設けられている。 The front SL distribution board, said that not disengageably locking portion is provided from above for both bar member.

上記構成によれば、システム天井の天井面の所定部位に分電盤を埋め込み状態で設置するとき、分電盤に設けた係止部を、天井面の所定部位に配設されている両バー材に対して上方から乗せ掛けるだけで、分電盤をバー材間に亘って荷重を支持させる状態で載架することができる。それ故に、分電盤の取付け作業性を一層向上することができる。 According to the above configuration, when the distribution board is installed in a predetermined position on the ceiling surface of the system ceiling in an embedded state, the locking portion provided on the distribution board is provided on both sides of the bar installed at the predetermined portion on the ceiling surface. The distribution board can be mounted in a state in which the load is supported across the bar members only by mounting it on the members from above. Therefore, the workability of installing the distribution board can be further improved.

前記分電盤のケーシングの少なくとも一つの側面部が開放されている。 At least one side portion of the front SL distribution board of the casing that are open.

上記構成によれば、分電盤のケーシングの少なくとも一つの側面部を開放形成することにより、ケーシング自体の重量を軽減することができるとともに、この側面部の大きな開放口を、分電盤に配置される分岐ブレーカ等に対する配線用の作業窓として使用することができる。それ故に、分電盤の軽量化による取付け作業性の向上と配線作業の容易化を図ることができる。 According to the above configuration, the weight of the casing itself can be reduced by forming at least one side surface portion of the casing of the distribution board to be open, and the large opening of this side surface portion is arranged on the distribution board. It can be used as a work window for wiring for a branch breaker or the like. Therefore, it is possible to improve the mounting workability and facilitate the wiring work by reducing the weight of the distribution board.

前記分電盤外に主幹ブレーカが配置され、前記分電盤には、前記主幹ブレーカに電力供給用ケーブルで電気接続される複数の分岐ブレーカが配置されている。 Main breaker is disposed outside the front SL distribution board, the said distribution board, that are arranged a plurality of branch breakers which are electrically connected with a power supply cable to the master breaker.

上記構成によれば、分電盤には複数の分岐ブレーカを配置し、各分岐ブレーカと分電盤
外に配置された主幹ブレーカとを電力供給用ケーブルで電気接続する形態を取るので、例
えば、分電盤内において主幹ブレーカと複数の分岐ブレーカとを電力供給用銅板で電気接
続する従来形態に比較して、重量のある電力供給用銅板が存在しない分だけ分電盤の軽量
化を促進することができ、分電盤の取付け作業性をさらに向上することができる。
本発明による第１の特徴構成は、躯体に吊下げ支持された多数のバー材で構成される天井下地に、天井面を形成する多数の天井材を取付け、前記天井面の所定部位に、分電盤を埋め込み状態で設置し、この分電盤の下側面で前記天井面の一部を構成してあるシステム天井であって、
前記分電盤を、前記天井下地の平行なバー材間に亘って荷重を支持させる状態で載架し、
前記天井下地は、前記バー材をグリッド状に枠組みして構成され、前記分電盤の長手方向幅は前記天井下地のグリッド幅に構成され、且つ、前記分電盤の短手方向幅は前記天井下地のグリッド幅よりも小に構成され、
前記分電盤の側面部の下端部には、グリッドの分電盤設置領域を除く残余領域に配置される天井板の端部を載架状態で支持する天井板支持部が形成されている点にある。
本発明による第２の特徴構成は、前記分電盤の短辺側の一方の側面部の短手方向中央部には、一方の前記バー材に対して上方から係脱自在な第１係止部が設けられ、短辺側の他方の側面部の短手方向両側部には、他方の前記バー材に対して上方から係脱自在な一組の第２係止部が設けられ、前記両第２係止部の隣接間は、前記第１係止部の長さよりも大なる間隔に構成されている点にある。
本発明による第３の特徴構成は、前記分電盤の長辺側の両側面部の各々には、前記分電盤内に配置される分岐ブレーカよりも大きな配線作業用の開放口が形成されている点にある。 According to the above configuration, a plurality of branch breakers are arranged in the distribution board, and each branch breaker and the main breaker arranged outside the distribution board are electrically connected by the power supply cable, so that, for example, Compared to the conventional form in which a main circuit breaker and a plurality of branch breakers are electrically connected to each other in a distribution board by a copper plate for power supply, the weight reduction of the distribution board is promoted as much as there is no heavy copper plate for power supply. Therefore, the workability of installing the distribution board can be further improved.
According to a first characteristic configuration of the present invention, a large number of ceiling materials forming a ceiling surface are attached to a ceiling base composed of a large number of bar materials suspended and supported by a skeleton, and a plurality of ceiling materials are formed at predetermined portions of the ceiling surface. A system ceiling in which a switchboard is installed in an embedded state, and a lower surface of this switchboard constitutes a part of the ceiling surface,
The distribution board is mounted in a state of supporting a load between the parallel bar members of the ceiling base,
The ceiling base is configured by framing the bar material in a grid shape, the longitudinal width of the distribution board is configured to be the grid width of the ceiling base, and the width of the distribution board in the lateral direction is the width. It is configured to be smaller than the grid width of the ceiling base,
At the lower end of the side surface of the distribution board, there is formed a ceiling board support portion for supporting the end of the ceiling board arranged in the remaining area of the grid except the distribution board installation area in a mounted state. It is in.
A second characteristic configuration according to the present invention is a first locking which is engageable with and disengageable from above with respect to one of the bar members, at a lateral center portion of one side surface portion on the short side of the distribution board. And a pair of second locking portions that are engageable with and disengageable from the other bar member from above are provided on both lateral sides of the other side surface portion on the short side. The space between the adjacent second locking portions is larger than the length of the first locking portion.
In a third characteristic configuration according to the present invention, an opening for wiring work larger than a branch breaker arranged in the distribution board is formed on each of both side surfaces on the long side of the distribution board. There is a point.

システム天井の天井裏側からの斜視図Perspective view from behind the system ceiling 図１におけるＩＩ−ＩＩ線断面図II-II sectional view taken on the line in FIG. 図１におけるＩＩＩ−ＩＩＩ線断面図III-III sectional view taken on the line in FIG. １つのグリッドに対応する分電の配置説明図Layout explanatory diagram of power distribution corresponding to one grid 分電盤の斜視図Perspective view of distribution board 分電盤の配線状態の説明図Illustration of wiring condition of distribution board

〔第１実施形態〕
図１〜図４は、建物の一例であるオフィスビルのシステム天井を示す。このシステム天井では、躯体としての床スラブ１の複数個所から垂設された吊りボルト２に、アルミ合金製やスチール製等の細長いバー材の一例である多数のＴバー３が、直吊りハンガー等の各種のジョイント４を介して水平姿勢で吊下げ支持されている。
Ｔバー３の形態としては従来から種々の形態のものが存在し、そのいずれの形態のものも好適に用いることができる。本実施形態で用いられるＴバー３は、図２、図３に示すように、上下方向に沿う板状のウェブ３Ｃと、このウェブ３Ｃの下端部から両側方に張り出す状態で一体形成される横断面形状が略コ状の下側フランジ部３Ａと、ウェブ３Ｃの上端部から両側方に張り出す状態で一体形成される横断面形状が中空矩形状の上側フランジ部３Ｂとから構成されている。
Ｔバー３の下側フランジ部３Ａの横断方向での横幅は、上側フランジ部３Ｂの横断方向での横幅よりも大に構成されている。 [First Embodiment]
1 to 4 show a system ceiling of an office building which is an example of a building. In this system ceiling, a large number of T-bars 3 which are examples of elongated bar members made of aluminum alloy, steel, etc. are attached to hanging bolts 2 suspended from a plurality of places of a floor slab 1 as a body, direct hanging hangers, etc. It is suspended and supported in a horizontal posture through various joints 4 of FIG.
Various forms of the T-bar 3 have been conventionally available, and any of these forms can be preferably used. As shown in FIGS. 2 and 3, the T-bar 3 used in the present embodiment is integrally formed with a plate-shaped web 3C extending in the up-down direction and in a state of protruding from the lower end of the web 3C to both sides. It is composed of a lower flange portion 3A having a substantially U-shaped cross section and an upper flange portion 3B having a hollow rectangular cross section which is integrally formed so as to project from the upper end of the web 3C to both sides. .
The lateral width of the lower flange portion 3A of the T-bar 3 in the transverse direction is larger than the lateral width of the upper flange portion 3B in the transverse direction.

多数のＴバー３は、同一水平面上において直交する縦横方向に沿って等間隔で連結され、この連結された多数のＴバー３をもってグリット状に枠組みされた天井下地５が構成されている。この天井下地５に区画形成されている多数の正方形のグリッド６は、例えば、縦方向のグリッド幅Ｌ×横方向のグリッド幅Ｌが600ｍｍ×600ｍｍ、又は、640ｍｍ×640ｍｍの大きさに構成されている。 A large number of T-bars 3 are connected at equal intervals along the vertical and horizontal directions that are orthogonal to each other on the same horizontal plane, and the plurality of connected T-bars 3 constitute a ceiling base 5 that is framed in a grid shape. The large number of square grids 6 partitioned and formed on the ceiling base 5 are, for example, configured such that the vertical grid width L × the horizontal grid width L is 600 mm × 600 mm or 640 mm × 640 mm. There is.

天井下地５を構成する縦横のＴバー３のうち、各グリッド６を区画形成する縦方向及び横方向で相対向する二組のＴバー３の下側フランジ部３Ａに亘って、縦方向のグリッド幅Ｌ×横方向のグリッド幅Ｌに対応する寸法で正方形に形成された天井材の一例である天井板７が取付けられ、多数の天井板７の下面側の天井仕上げ面とＴバー３の下側フランジ部３Ａの下面とでシステム天井の天井面Ｃの主要部が形成されている。
各天井板７の周側面部には、Ｔバー３の下側フランジ部３Ａの高さに相当する溝深さの環状掛止溝部７ａが形成されている。そのため、各天井板７の環状掛止溝部７ａを、各グリッド６を区画形成するＴバー３の下側フランジ部３Ａに対して上方から係合状態で乗せ掛けることにより、各天井板７をＴバー３に荷重を支持させる状態で載架してある。 Of the vertical and horizontal T-bars 3 that form the ceiling base 5, the vertical grids extend over the lower flange portions 3A of the two sets of the T-bars 3 that define the grids 6 and that face each other in the vertical and horizontal directions. A ceiling board 7 which is an example of a ceiling material formed in a square with dimensions corresponding to the width L × the lateral grid width L is attached, and the ceiling finish surface on the lower surface side of the many ceiling boards 7 and the bottom of the T bar 3. The lower surface of the side flange portion 3A forms a main part of the ceiling surface C of the system ceiling.
An annular retaining groove portion 7a having a groove depth corresponding to the height of the lower flange portion 3A of the T bar 3 is formed on the peripheral side surface portion of each ceiling plate 7. Therefore, by mounting the annular retaining groove portion 7a of each ceiling plate 7 on the lower flange portion 3A of the T bar 3 that defines and forms each grid 6 from above in an engaged state, each ceiling plate 7 is T-shaped. The bar 3 is mounted in a state of supporting the load.

そして、上述のシステム天井においては、天井面Ｃの所定部位に分電盤Ｄが埋め込み状態で設置され、天井面Ｃの他の所定部位には、図示はしないが照明器具等の他の天井配置機器が埋め込み状態で設置され、分電盤Ｄの下側面と他の天井配置機器の下側面が天井面Ｃの一部を構成することになる。
上述のように、分電盤Ｄをシステム天井の天井面Ｃの所定部位に埋め込み状態で設置することにより、例えば、分電盤Ｄを共用部や執務室などの電気幹線用パイプスペース（ＥＰＳ）や壁面に設置する場合に比較して、家具配置等の使い勝手に制約を与えず、且つ、オフィスのレンタブル比及び天井面Ｃの意匠性を損なうことなく分電盤Ｄを配置することができる。 In the above-mentioned system ceiling, the distribution board D is installed in a predetermined portion of the ceiling surface C in an embedded state, and at other predetermined portions of the ceiling surface C, other ceiling arrangements such as lighting fixtures, which are not shown. The device is installed in an embedded state, and the lower surface of the distribution board D and the lower surfaces of other ceiling-mounted devices form a part of the ceiling surface C.
As described above, by installing the distribution board D in a predetermined state on the ceiling surface C of the system ceiling in an embedded state, for example, the distribution board D is a pipe space (EPS) for an electric trunk line such as a common area or an office. In comparison with the case where the distribution board D is installed on a wall surface or a wall surface, the distribution board D can be arranged without restricting usability such as furniture arrangement, and without impairing the rentable ratio of the office and the design of the ceiling surface C.

分電盤Ｄのケーシング１０は、図１〜図４に示すように、各グリッド６を区画形成する縦方向及び横方向で相対向する二組のＴバー３間に入り込み配置可能な略直方体形状に構成されている。詳しくは、分電盤Ｄのケーシング１０の長手方向幅（長辺寸法）Ｗ１は、グリッド６のグリッド幅Ｌに構成され、ケーシング１０の短手方向幅（短辺寸法）Ｗ２は、各グリッド６のグリッド幅Ｌよりも小に構成されている。本実施形態においては、ケーシング１０の短手方向幅Ｗ２は、グリッド幅Ｌの略１／３又はそれに近い寸法に構成されている。
尚、他の天井配置機器のケーシングも、分電盤Ｄのケーシング１０と同様に、長手方向幅（長辺寸法）は、グリッド６のグリッド幅Ｌに構成され、且つ、短手方向幅（短辺寸法）は、グリッド幅Ｌの略１／３又はそれに近い寸法に構成されている。 As shown in FIGS. 1 to 4, the casing 10 of the distribution board D has a substantially rectangular parallelepiped shape that can be inserted and arranged between two sets of T-bars 3 that define the grids 6 and that face each other in the vertical direction and the horizontal direction. Is configured. Specifically, the longitudinal width (long side dimension) W1 of the casing 10 of the distribution board D is configured to be the grid width L of the grid 6, and the lateral width (short side dimension) W2 of the casing 10 is set to each grid 6. Is smaller than the grid width L. In this embodiment, the width W2 in the lateral direction of the casing 10 is configured to be approximately 1/3 of the grid width L or a dimension close thereto.
In the casings of other ceiling-mounted devices, the width in the longitudinal direction (long-side dimension) is set to the grid width L of the grid 6 and the width in the lateral direction (short) as in the casing 10 of the distribution board D. The side dimension) is configured to be approximately 1/3 of the grid width L or a dimension close thereto.

分電盤Ｄのケーシング１０には、下方である室内側に開口するケーシング本体１１と、当該ケーシング本体１１の開口を開閉可能な揺動式の化粧扉１２とが主要構成として備えられている。
ケーシング本体１１の長手方向で相対向する短辺側の側面部１１Ａ、１１Ｃのうち、一方の側面部１１Ａの短手方向中央部には、図１、図２、図４、図５に示すように、ケーシング１０の長手方向で相対向する一組のＴバー３の一方に対して上方から係脱自在な広幅の第１係止部１３が設けられている。ケーシング本体１１の他方の短辺側の側面部１１Ｃにおける短手方向両側部には、図２、図４、図５に示すように、ケーシング１０の長手方向で相対向する一組のＴバー３の他方に対して上方から係脱自在な狭幅の第２係止部１４が設けられている。
ケーシング本体１１の第１係止部１３及び第２係止部１４を両Ｔバー３に対して上方から係合させた状態では、ケーシング１０が両Ｔバー３に荷重を支持させる状態で安定良く三点支持される。
また、両第２係止部１４の隣接間は、第１係止部１３の長さよりも大なる間隔に構成されている。そのため、２台の分電盤Ｄを一列状態で配置する必要が生じた場合でも、一方の分電盤Ｄの両第２係止部１４が係合されているＴバー３に対して、他方の分電盤Ｄの第１係止部１３を、一方の分電盤Ｄの両第２係止部１４の隣接間に入り込み配置した状態で係合させることができる。 The casing 10 of the distribution board D is mainly provided with a casing main body 11 that opens downward to the inside of the room, and a swingable makeup door 12 that can open and close the opening of the casing main body 11.
Of the side portions 11A, 11C on the short side opposite to each other in the longitudinal direction of the casing body 11, one of the side portions 11A has a center portion in the lateral direction as shown in FIG. 1, FIG. 2, FIG. 4, and FIG. In addition, a wide first locking portion 13 is provided which can be engaged and disengaged from above with respect to one of the pair of T bars 3 facing each other in the longitudinal direction of the casing 10. As shown in FIGS. 2, 4, and 5, a pair of T-bars 3 facing each other in the longitudinal direction of the casing 10 are provided on both sides in the lateral direction of the side surface portion 11C on the other short side of the casing body 11. The second engaging portion 14 having a narrow width is provided on the other side of the second engaging portion 14 so as to be engageable and disengageable from above.
In a state where the first locking portion 13 and the second locking portion 14 of the casing body 11 are engaged with both T-bars 3 from above, the casing 10 stably supports the load on both T-bars 3. Three points are supported.
Further, the space between the adjacent second locking portions 14 is configured to be larger than the length of the first locking portion 13. Therefore, even when it is necessary to arrange the two distribution boards D in a single row, the other of the T-bars 3 with which the second locking portions 14 of one distribution board D are engaged is different from the other. The first locking portion 13 of the distribution board D can be engaged with the second locking portions 14 of one of the distribution boards D so as to be inserted between the adjacent second locking portions 14.

上述のように、システム天井の天井下地５に区画形成されている多数のグリッド６の何れにおいても、そのグリッド６を形成する両Ｔバー３に対して、分電盤Ｄのケーシング本体１１に設けられた第１係止部１３及び第２係止部１４を上方から係合状態で乗せ掛けることにより、分電盤Ｄを両Ｔバー３に荷重を支持させる状態で安定良く載架支持することができる。それ故に、システム天井の天井下地５における取付け対象のグリッド６に分電盤Ｄを能率良く容易に設置することができるとともに、分電盤Ｄの設置場所の自在性も高めることができる。 As described above, in any of the large number of grids 6 formed in the ceiling base 5 of the system ceiling, the T-bars 3 forming the grids 6 are provided in the casing body 11 of the distribution board D. By stably mounting the first locking portion 13 and the second locking portion 14 thus fixed from above from above, the distribution board D can be stably mounted and supported in a state in which the load is supported on both T-bars 3. You can Therefore, the distribution board D can be efficiently and easily installed on the grid 6 to be mounted on the ceiling base 5 of the system ceiling, and the installation location of the distribution board D can be increased.

第１係止部１３及び第２係止部１４の各々は、図１、図２、図５に示すように、ケーシング本体１１の短辺側の側面部１１Ａ，１１Ｃに固着される取付け板部１３ａ，１４ａと、当該取付け板部１３ａ，１４ａの下端から水平方向の外方側に折り曲げ形成され、且つ、Ｔバー３の上側フランジ部３Ｂに対して上方から乗せ掛け状態で係合する係合板部１３ｂ，１４ｂと、当該係合板部１３ｂ，１４ｂの先端から下方に折り曲げ形成される外止め板部１３ｃ，１４ｃとから構成されている。
第１係止部１３の係合板部１３ｂ及び第２係止部１４の係合板部１４ｂは、図１、図２に示すように、Ｔバー３の上側フランジ部３Ｂに乗せ掛けられた載置状態にあるため、第１係止部１３及び第２係止部１４はＴバー３の上側フランジ部３Ｂの長手方向に沿ってスライド移動自在に構成されている。これにより、天井下地５の両Ｔバー３に載架された分電盤Ｄの取付け位置を両Ｔバー３に沿って自由に変更することができる。
また、図２に示すように、第１係止部１３の外止め板部１３ｃ及び第２係止部１４の外止め板部１４ｃには、Ｔバー３のウェブ３Ｃに当接する固定用のネジ部材１５が螺合されている。 As shown in FIGS. 1, 2, and 5, each of the first locking portion 13 and the second locking portion 14 is a mounting plate portion fixed to the side surface portions 11A and 11C on the short side of the casing body 11. 13a and 14a, and an engagement plate that is bent outward from the lower ends of the mounting plate portions 13a and 14a in the horizontal direction and that engages with the upper flange portion 3B of the T-bar 3 from above in a mounted state. It is comprised from the parts 13b and 14b, and the outer stop plate parts 13c and 14c bent downward from the tips of the engagement plate parts 13b and 14b.
The engaging plate portion 13b of the first locking portion 13 and the engaging plate portion 14b of the second locking portion 14 are mounted on the upper flange portion 3B of the T bar 3 as shown in FIGS. 1 and 2. Since it is in the state, the first locking portion 13 and the second locking portion 14 are configured to be slidable along the longitudinal direction of the upper flange portion 3B of the T bar 3. Thereby, the mounting position of the distribution board D mounted on both T-bars 3 of the ceiling base 5 can be freely changed along both T-bars 3.
In addition, as shown in FIG. 2, the outer retaining plate 13c of the first retaining portion 13 and the outer retaining plate 14c of the second retaining portion 14 are provided with fixing screws that contact the web 3C of the T-bar 3. The member 15 is screwed.

図３、図５に示すように、ケーシング本体１１の長辺側の両側面部１１Ｂ，１１Ｄのうち、一方の長辺側の側面部１１Ｂの下端１１ｂは、閉止姿勢にある化粧扉１２の下側面（室内側外面）１２ａに対してＴバー３の下側フランジ部３Ａの高さに相当する寸法分だけ短く構成されている。
そのため、図３に示すように、ケーシング本体１１の第１係止部１３及び第２係止部１４を両Ｔバー３の上側フランジ部３Ｂに載架し、且つ、一方の長辺側の側面部１１ＢをＴバー３の上側フランジ部３Ｂの一側面に当接又は近接させた状態では、一方の長辺側の側面部１１Ｂの下端１１ｂが、Ｔバー３の下側フランジ部３Ａに対して上方から係合し、分電盤ＤをＴバー３に支持させる支持構造の一部を構成している。 As shown in FIG. 3 and FIG. 5, the lower end 11b of the side surface portion 11B on one long side of the both side portions 11B, 11D on the long side of the casing body 11 is the lower surface of the makeup door 12 in the closed posture. It is configured to be shorter than the (inner side outer surface) 12a by a dimension corresponding to the height of the lower flange portion 3A of the T bar 3.
Therefore, as shown in FIG. 3, the first locking portion 13 and the second locking portion 14 of the casing body 11 are mounted on the upper flange portions 3B of both T-bars 3, and the side surface on one long side is In the state where the portion 11B is brought into contact with or close to one side surface of the upper side flange portion 3B of the T bar 3, the lower end 11b of the side surface portion 11B on the one long side is with respect to the lower side flange portion 3A of the T bar 3. It constitutes a part of a support structure that is engaged from above and supports the distribution board D on the T-bar 3.

また、図２、図５に示すように、ケーシング本体１１の短辺側の両側面部１１Ａ，１１Ｃの下端１１ａ，１１ｃも、上述の一方の長辺側の側面部１１Ｂと同様に、閉止姿勢にある化粧扉１２の下側面１２ａに対してＴバー３の下側フランジ部３Ａの高さに相当する寸法分だけ短く構成されている。
そのため、図２に示すように、ケーシング本体１１の第１係止部１３及び第２係止部１４を両Ｔバー３の上側フランジ部３Ｂに載架し、且つ、短辺側の両側面部１１Ａ，１１ＣをＴバー３の上側フランジ部３Ｂの一側面に当接又は近接させた状態では、短辺側の両側面部１１Ａ，１１Ｃの下端１１ａ，１１ｃが、Ｔバー３の下側フランジ部３Ａに対して上方から係合し、分電盤ＤをＴバー３に支持させる支持構造の一部を構成している。 In addition, as shown in FIGS. 2 and 5, the lower ends 11a and 11c of the both side surfaces 11A and 11C on the short side of the casing body 11 are also in the closed position, like the side surface section 11B on the one long side. It is configured to be shorter than a lower side surface 12a of a certain decorative door 12 by a dimension corresponding to the height of the lower flange portion 3A of the T bar 3.
Therefore, as shown in FIG. 2, the first locking portion 13 and the second locking portion 14 of the casing main body 11 are mounted on the upper flange portions 3B of both T-bars 3 and both side surface portions 11A on the short side. , 11C is brought into contact with or close to one side surface of the upper flange portion 3B of the T-bar 3, the lower ends 11a, 11c of both side surface portions 11A, 11C on the short side are attached to the lower flange portion 3A of the T-bar 3. On the other hand, a part of a support structure that engages from above and supports the distribution board D on the T-bar 3 is configured.

図３〜図５に示すように、他方の長辺側の側面部１１Ｄの下端部には、グリッド６の分電盤設置領域を除く残余領域に配置される短寸法の天井板７の環状掛止溝部７ａを載架状態で支持する天井板支持部１６が形成されている。この天井板支持部１６の下側面１６ａは、閉止姿勢にある化粧扉１２の下側面１２ａと同じ高さ位置に構成されている。 As shown in FIG. 3 to FIG. 5, at the lower end of the side surface portion 11D on the other long side, a ring-shaped hook of a short-sized ceiling plate 7 arranged in the remaining area of the grid 6 excluding the distribution board installation area. A ceiling plate support portion 16 that supports the stop groove portion 7a in a mounted state is formed. The lower side surface 16a of the ceiling board support portion 16 is formed at the same height position as the lower side surface 12a of the makeup door 12 in the closed posture.

図２、図３、図５に示すように、ケーシング本体１１の天井面部１１Ｅの内面には、複数（本実施形態では８個）の分岐ブレーカ２１と、複数（本実施形態では６個）の弱電用端子２２と、銅製のアースバー２３が配設されている。
そして、図６に示すように、分岐ブレーカ２１の一次側は、分電盤Ｄのケーシング１０外である共用部に配置された主幹ユニット２４の主幹ブレーカ２５と単相３線式の電力供給用ケーブル２６で電気接続され、分岐ブレーカ２１の二次側は、照明器具やコンセント、照明制御機器等の電力供給先と電力供給用ケーブル２７で電気接続されている。
弱電用端子２２の一次側は、共用部に配置された主幹ユニット２４と幹線ケーブル２９で電気接続され、弱電用端子２２の二次側は、電話機等の中継先と中継用ケーブル３０で電気接続されている。
アースバー２３には、コンセント等のアース接続機器とアース線３１で電気接続されている。 As shown in FIG. 2, FIG. 3, and FIG. 5, a plurality of (eight in this embodiment) branch breakers 21 and a plurality (six in this embodiment) of branch breakers 21 are provided on the inner surface of the ceiling surface portion 11E of the casing body 11. A low-power terminal 22 and a copper earth bar 23 are provided.
Then, as shown in FIG. 6, the primary side of the branch breaker 21 is for supplying power to the main circuit breaker 25 of the main unit 24 arranged in the common portion outside the casing 10 of the distribution board D and the single-phase three-wire system. The branch breaker 21 is electrically connected by a cable 26, and the secondary side of the branch breaker 21 is electrically connected by a power supply cable 27 to a power supply destination such as a lighting fixture, an outlet, and a lighting control device.
The primary side of the terminal 22 for low power is electrically connected to the main unit 24 arranged in the common area by a trunk cable 29, and the secondary side of the terminal 22 for low power is electrically connected to a relay destination such as a telephone with a relay cable 30. Has been done.
The grounding bar 23 is electrically connected to a grounding connection device such as an outlet through a grounding wire 31.

また、ケーシング本体１１内には、図３、図５に示すように、分岐ブレーカ２１の二次側の電力供給用ケーブル２７及び弱電用端子２２の二次側の中継用ケーブル３０に対する配線挿入孔３２ａを備えた配線ガイド板３２が、他方の長辺側の側面部１１Ｄに沿って配設されている。
さらに、図１〜図３、図５に示すように、ケーシング本体１１の長辺側の両側面部１１Ｂ，１１Ｄの各々には、当該側面部１１Ｂ，１１Ｄを開放する長手方向で二つの大きな矩形状の配線作業用の開放口３５が形成されている。
本実施形態では、ケーシング本体１１の二つの長辺側の側面部１１Ｂ，１１Ｄを開放形成するので、分電盤Ｄ自体の重量を軽減することができるとともに、この長辺側の両側面部１１Ｂ，１１Ｄの大きな開放口３５を、分電盤Ｄに配置される分岐ブレーカ２１等に対する配線作業窓として使用することができる。それ故に、分電盤Ｄの軽量化による取付け作業性の向上と配線作業の容易化を図ることができる。 Further, as shown in FIGS. 3 and 5, in the casing body 11, wiring insertion holes for the power supply cable 27 on the secondary side of the branch breaker 21 and the relay cable 30 on the secondary side of the low-power terminal 22 are inserted. The wiring guide plate 32 including 32a is arranged along the side surface portion 11D on the other long side.
Further, as shown in FIG. 1 to FIG. 3 and FIG. 5, each of the long side side surface portions 11B and 11D of the casing main body 11 has two large rectangular shapes in the longitudinal direction which open the side surface portions 11B and 11D. An opening 35 is formed for wiring work.
In the present embodiment, since the two long side surface portions 11B and 11D of the casing body 11 are formed open, the weight of the distribution board D itself can be reduced, and both side surface portions 11B on the long side can be reduced. The large opening 35 of 11D can be used as a wiring work window for the branch breaker 21 and the like arranged on the distribution board D. Therefore, it is possible to improve mounting workability and facilitate wiring work by reducing the weight of the distribution board D.

分電盤Ｄの化粧扉１２は、ケーシング本体１１の下向き開口部に水平軸芯周りで揺動開閉自在に枢着され、化粧扉１２の長手方向中央の先端側部位には、室内側から施錠及び解錠操作可能な錠３６が設けられている。 The decorative door 12 of the distribution board D is pivotally attached to the downward opening of the casing main body 11 so as to be able to swing and open / close about a horizontal axis, and the distal end portion at the center of the decorative door 12 in the longitudinal direction is locked from the indoor side. Also, a lock 36 that can be unlocked is provided.

〔その他の実施形態〕
（１）上述の第１実施形態では、システム天井の天井下地５を、同一水平面上において直交する縦横方向に沿って多数のＴバー３をグリット状に枠組みして構成したが、この構成に限定されない。例えば、縦方向又は横方向に沿う多数のＴバー３の上面に、横方向又は縦方向に沿う多数のＴバー３を載架してシステム天井の天井下地５を構成してもよい。
さらに、縦方向又は横方向に沿う多数のＴバー３をもってシステム天井の天井下地５を構成してもよい。 [Other Embodiments]
(1) In the above-described first embodiment, the ceiling base 5 of the system ceiling is configured by framing a large number of T-bars 3 along the vertical and horizontal directions orthogonal to each other on the same horizontal plane, but is limited to this configuration. Not done. For example, the ceiling base 5 of the system ceiling may be configured by mounting a large number of T-bars 3 extending in the horizontal direction or the vertical direction on the upper surfaces of a large number of T-bars 3 extending in the vertical direction or the horizontal direction.
Further, the ceiling base 5 of the system ceiling may be configured with a large number of T-bars 3 extending in the vertical direction or the horizontal direction.

（２）上述の第１実施形態では、ケーシング本体１１の短辺側の両側面部１１Ａ、１１Ｃに、両Ｔバー３に対して上方から係脱自在な第１係止部１３及び第２係止部１４を設けたが、この構成に限定されない。例えば、両Ｔバー３に対して上方から係脱自在に載架される支持フレームに、分電盤Ｄのケーシング１０を取付けてもよい。
さらに、分電盤Ｄのケーシング１０を両Ｔバー３に直接にボルトやビス等で固定連結してもよい。 (2) In the above-described first embodiment, the first locking portion 13 and the second locking portion that are engageable and disengageable from above with respect to both T-bars 3 are provided on both side surface portions 11A and 11C on the short side of the casing body 11. Although the portion 14 is provided, the configuration is not limited to this. For example, the casing 10 of the distribution board D may be attached to a support frame that is removably mounted on the T-bars 3 from above.
Further, the casing 10 of the distribution board D may be directly fixedly connected to both the T-bars 3 with bolts or screws.

（３）上述の第１実施形態では、分電盤Ｄのケーシング１０内に分岐ブレーカ２１等を配置したが、この構成に限定されない。例えば、分電基板に分岐ブレーカ２１等を配設してもよい。 (3) In the above-described first embodiment, the branch breaker 21 and the like are arranged in the casing 10 of the distribution board D, but the configuration is not limited to this. For example, the branch breaker 21 or the like may be arranged on the distribution board.

（４）上述の第１実施形態では、ケーシング本体１１の長辺側の両側面部１１Ｂ，１１Ｄの各々を開放形成したが、この構成に限定されない。例えば、ケーシング本体１１の長辺側の両側面部１１Ｂ，１１Ｄ及び短辺側の両側面部１１Ａ、１１Ｃの各々を開放形成してもよい。
要するに、ケーシング本体１１の側面部１１Ａ〜１１Ｄのうち、少なくとも一つの側面部を開放形成すればよい。 (4) In the above-described first embodiment, the side surfaces 11B and 11D on the long side of the casing body 11 are formed to be open, but the configuration is not limited to this. For example, both side surface portions 11B and 11D on the long side of the casing body 11 and both side surface portions 11A and 11C on the short side may be formed open.
In short, at least one of the side surface portions 11A to 11D of the casing body 11 may be opened.

１躯体（床スラブ）
３バー材（Ｔバー）
５天井下地
７天井材（天井板）
１０ケーシング
１１Ｂ側面部（長辺側の側面部）
１１Ｄ側面部（長辺側の側面部）
１３係止部（第１係止部）
１４係止部（第２係止部）
２１分岐ブレーカ
２５主幹ブレーカ
２６電力供給用ケーブル
Ｃ天井面
Ｄ分電盤
Ｌグリッド幅
Ｗ１長手方向幅
Ｗ２短手方向幅 1 skeleton (floor slab)
3 bar material (T bar)
5 Ceiling base material 7 Ceiling material (ceiling board)
10 Casing 11B Side part (long side side part)
11D Side part (side part on the long side)
13 Locking part (first locking part)
14 Locking part (second locking part)
21 Branch Breaker 25 Main Breaker 26 Power Supply Cable C Ceiling Surface D Distribution Board L Grid Width W1 Longitudinal Width W2 Short Width

Claims

A ceiling base material composed of a large number of bar members suspended and supported by a frame is attached with a large number of ceiling materials forming a ceiling surface, and a distribution board is installed in a predetermined portion of the ceiling surface in an embedded state. A system ceiling in which a part of the ceiling surface is formed by the lower surface of the distribution board,
The distribution board is mounted in a state of supporting a load between the parallel bar members of the ceiling base ,
The ceiling base is configured by framing the bar material in a grid shape, the longitudinal width of the distribution board is configured to be the grid width of the ceiling base, and the width of the distribution board in the lateral direction is the width. It is configured to be smaller than the grid width of the ceiling base,
At the lower end of the side surface of the distribution board, there is formed a ceiling board support part for supporting the end of the ceiling board arranged in the remaining area of the grid except the distribution board installation area in a mounted state. ceiling.

A first locking portion that is engageable and disengageable from above with respect to one of the bar members is provided at the center portion in the lateral direction of one side surface portion on the short side of the distribution board, and the other one on the short side is provided. A pair of second locking portions that can be engaged with and disengaged from the other bar member from above is provided on both side portions in the lateral direction of the side surface portion of the The system ceiling according to claim 1, wherein the system ceiling is configured with an interval larger than a length of the first locking portion .

The system ceiling according to claim 1 or 2 , wherein an opening for wiring work, which is larger than a branch breaker arranged in the distribution board, is formed on each of both side surfaces on the long side of the distribution board. .