JP4023930B2

JP4023930B2 - Revolving door support mechanism

Info

Publication number: JP4023930B2
Application number: JP31317498A
Authority: JP
Inventors: 勉上野; 弘渡部; 幸浩大庭
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 1998-11-04
Filing date: 1998-11-04
Publication date: 2007-12-19
Anticipated expiration: 2018-11-04
Also published as: JP2000145256A

Description

【０００１】
【発明の属する技術分野】
本発明は、建物の壁に取り付けた筐体に対して取り付けおよび取り外しが容易な回転扉の支持機構に関し、例えば壁掛形防災アンプの開閉扉に適用して好適なものである。
【０００２】
【従来の技術】
建物の壁に取り付けた筐体に対して回転扉を取り付ける構造としては、例えば壁掛形防災アンプがある。壁掛形防災アンプはラック形防災アンプと共に消防法の規定から一定規模以上の建物に設置が義務付けられた放送設備である。
【０００３】
ラック形防災アンプが縦長のラックの中に操作ユニット、制御ユニット、電源ユニット等の各種ユニットを装着して構成したものであるのに対し、壁掛形防災アンプは建物の壁に直接固定する一体構成形の比較的小形のものである。
【０００４】
前述したように、壁掛形防災アンプは筐体を建物の壁に固定し、筐体の前面に開閉扉を回動自在に取り付けた構成となっている。開閉扉はマイクロホンをはじめ非常起動スイッチや放送階選択スイッチなどが装備された操作パネルを形成している。
【０００５】
【発明が解決しようとする課題】
ところで、従来の壁掛形防災アンプの開閉扉は、筐体の内側面に蝶番によって回動自在に取り付ける構造であるため、設置工事の際に壁に固定した筐体に開閉扉を取り付ける作業は一人では困難であった。また、メンテナンス時においても壁に固定した筐体から開閉扉を取り外す作業は困難であった。
【０００６】
本発明は、このような従来の課題を解決するためになされたもので、筐体に対する取り付けおよび取り外しが容易な回転扉の支持機構を提供することを目的とする。
【０００７】
【課題を解決するための手段】
本発明による回転扉の支持機構は、筐体の前面開口部に一方の側方を回動支点として前後に開閉する開閉扉を設け、筐体は開口部の一方の側方の天井面および底面に一対の固定軸を対向して有し、開閉扉は一方の側方の上面に筐体の天井面の固定軸と係合する係合孔と一方の側方の底面に筐体の底面の固定軸と係合する側端面に開口部を有する切欠溝とを有し、開閉扉の切欠溝の上面に筐体の底面の固定軸と係合する係合孔を有する抑え部材を取り付けた回転扉の支持機構において、抑え部材の先端部が開閉扉の一方の側端面から突出して取り付けられ、筐体の底面に開閉扉の開扉時に抑え部材の先端部が当接する係止部材を設けたものであり、または、前記筐体の前面開口部の底面および開閉扉の底面の裏面に、前記開閉扉の開扉時に互いに接触する突起をそれぞれ設けたものである。
【０００８】
本発明によれば、筐体に対する取り付けおよび取り外しが容易な開閉扉を備えた回転扉の支持機構が得られる。
【０００９】
【発明の実施の形態】
本発明の請求項１に記載の発明は、筐体の前面開口部に一方の側方を回動支点として前後に開閉する開閉扉を設け、筐体は開口部の一方の側方の天井面および底面に一対の固定軸を対向して有し、開閉扉は一方の側方の上面に筐体の天井面の固定軸と係合する係合孔と一方の側方の底面に筐体の底面の固定軸と係合する側端面に開口部を有する切欠溝とを有し、開閉扉の切欠溝の上面に筐体の底面の固定軸と係合する係合孔を有する抑え部材を取り付けた回転扉の支持機構において、抑え部材の先端部が開閉扉の一方の側端面から突出して取り付けられ、筐体の底面に開閉扉の開扉時に抑え部材の先端部が当接する係止部材を設けたものである。
【００１０】
本発明によると、筐体の天井面の固定軸に開閉扉の上面の係合孔を嵌め込み、筐体の底面の固定軸に開閉扉の切欠溝を開口部から嵌め込み、抑え部材を開閉扉の底面上に固定することで開閉扉を筐体に取り付けることができるという作用を有する。
【００１２】
また、本発明によると、開閉扉の開扉時に抑え部材の先端部が係止部材と当接して開閉扉の開扉角度を規制するという作用を有する。
【００１３】
本発明の請求項２に記載の発明は、筐体の前面開口部に一方の側方を回動支点として前後に開閉する開閉扉を設け、筐体は開口部の一方の側方の天井面および底面に一対の固定軸を対向して有し、開閉扉は一方の側方の上面に筐体の天井面の固定軸と係合する係合孔と一方の側方の底面に筐体の底面の固定軸と係合する側端面に開口部を有する切欠溝とを有し、開閉扉の切欠溝の上面に筐体の底面の固定軸と係合する係合孔を有する抑え部材を取り付けた回転扉の支持機構において、筐体の前面開口部の底面および開閉扉の底面の裏面に、開閉扉の開扉時に互いに接触する突起をそれぞれ設けたものである。
【００１４】
本発明によると、筐体に対する取り付けおよび取り外しが容易な開閉扉を備えた回転扉が得られると共に、開閉扉が開いたときにそれぞれの突起が互いに摩擦係合して開閉扉を静止させるという作用を有する。
【００１５】
以下、本発明の実施の形態について、図１〜図５を用いて説明する。
【００１６】
（実施の形態１）
図１は、本発明が適用される壁掛形防災アンプの正面図で、建物の壁（図示せず）に固定された筐体１の前面に、操作パネル構成の開閉扉２が取り付けられた構成を示している。
【００１７】
開閉扉２の表面には、マイクロホン３のほか、非常起動スイッチ、非常復旧スイッチ、火災放送スイッチ、非火災放送スイッチ、放送階選択スイッチ等の各種操作子が装備されている。開閉扉２を開けるには、左端に取り付けられているネジ４ａ，４ｂを取り外し、開閉扉２の左端側を手前に引くことで、右端側を回動支点として開けることができる。
【００１８】
図２は、本発明による回転扉の支持機構の実施の形態１を示す斜視図で、筐体１と開閉扉２との結合関係を示す図である。同図において、筐体１は前面の枠体１１の右内側面１１ａから横方向に一定の距離をおいて枠体１１の天井面１１ｂおよび底面１１ｃに固定軸１２ａ，１２ｂを立設した構成を有し、さらに固定軸１２ｂの後方に枠体１１に対して後方に直交する面状の係止部材１３を立設した構成を有している。
【００１９】
開閉扉２は上面２１に右端面２２から横方向に一定の距離をおいて係合孔２１ａが穿設されており、底面２３には右端面２２側に開口部を有する切欠溝２３ａが穿設されている。係合孔２１ａが筐体１の固定軸１２ａと係合し、切欠溝２３ａが筐体１の固定軸１２ｂと係合する。こうして開閉扉２が筐体１に対して回動自在に取り付けられる。
【００２０】
また、開閉扉２の右端面２２の下部には、固定軸１２ｂと切欠溝２３ａとが係合する際の固定軸１２ｂに対する逃げとして切り欠き２２ａが設けられている。また、開閉扉２の底面２３上には、固定軸１２ｂと切欠溝２３ａとの係合後に上方から抑え部材５が取り付けられる構成となっている。
【００２１】
図３は、筐体１、開閉扉２、抑え部材５の係合関係を示す分解斜視図である。抑え部材５は底面５ａと立上り片５ｂとを有し、底面５ａには係合孔５ｃが穿設され、立上り片５ｂにはネジ孔５ｄ，５ｅが穿設されている。
【００２２】
この抑え部材５は底面５ａが開閉扉２の底面２３上に載置され、係合孔５ｃに固定軸１２ｂの先端が挿入される状態で取り付けられる。これにより切欠溝２３ａの開口部は抑え部材５の底面５ａによって塞がれ、固定軸１２ｂが切欠溝２３ａから抜け出るのを阻止することができる。
【００２３】
また、抑え部材５はネジ孔５ｄが開閉扉２の底面２３から立上った後端面２３ｂに穿設されたネジ孔２３ｃと位置決めされてネジ６により開閉扉２に固定される。また、抑え部材５はネジ孔５ｅが開閉扉２の右端面２２から立上った後端面２２ｂに穿設された長孔２２ｃと位置決めされてネジ７により開閉扉２に固定される。
【００２４】
また、抑え部材５は先端部５ｆが開閉扉２の右端面２２より外側に突出した状態で取り付けられ、開閉扉２の開扉時に先端部５ｆの側面５ｇが係止部材１３と当接して開閉扉２の開扉角度を規制する役目を果たしている。
【００２５】
図４は、開閉扉２が開いたときに筐体１の係止部材１３と抑え部材５の先端部５ｆの側面５ｇとが当接して開閉扉２の開扉角度を規制している状態を示す要部平面図である。
【００２６】
この図から明らかなように、側面５ｇの切り落とし角度θを変更することによって開閉扉２の開扉角度を調整することができる。なお、開閉扉２が閉じたときに、抑え部材５の先端部５ｆが筐体１の枠体１１に当接するのを避けるために、内側面１１ａの下部に切り欠き１１ｄを設けている。
【００２７】
また、開閉扉２が開いたときに開閉扉２を静止させるための簡易なロック機構として、枠体１１の底面１１ｃ上に固定軸１２ｂに隣接して突起１１ｅを設け、開閉扉２の底面２３の裏面に切欠溝２３ａに隣接して突起２３ｄを設けている。これにより、開閉扉２の開扉時に両突起１１ｅ，２３ｄが摩擦係合して開閉扉２を静止させることができる。
【００２８】
この構成において、設置工事時に壁に固定した筐体１に開閉扉２を取り付けるには、開閉扉２を筐体１の前面開口部に対してほぼ直交させ、筐体１の固定軸１２ａに開閉扉２の係合孔２１ａを嵌め込み、筐体１の固定軸１２ｂに切欠溝２３ａを開口部から嵌め込む。
【００２９】
次いで、抑え部材５を開閉扉２の底面２３上に載置する。このとき固定軸１２ｂの先端が係合孔５ｃを貫通する状態で載置する。そして、開閉蓋２のネジ孔２３ｃと抑え部材５のネジ孔５ｄとを位置決めしてネジ６で固着し、開閉蓋２の長孔２２ｃと抑え部材５のネジ孔５ｅとを位置決めしてネジ７で固着する。
【００３０】
逆に、メンテナンス等で筐体１から開閉扉２を取り外す場合は、開閉扉２を開いた状態でネジ６，７を取り外し、図５に示すように、抑え部材５を固定軸１２ｂから上方に抜き取る。抑え部材５を外しても開閉扉２は自重でＡ方向に作用するため、開閉扉２は脱落することなく安全性を確保することができる。
【００３１】
次いで、固定軸１２ａを支点として開閉扉２の下部をＢ方向に引き出すと、切欠溝２３ａから固定軸１２ｂが外れ、次いで係合孔２１ａが固定軸１２ａから外れるので、開閉扉２を筐体１から取り外すことができる。
【００３２】
【発明の効果】
本発明によれば、筐体の天井面の固定軸に開閉扉の上面の係合孔を嵌め込み、筐体の底面の固定軸に開閉扉の切欠溝を開口部から嵌め込み、抑え部材を開閉扉の底面上に固定することで開閉扉を筐体に取り付けることができるので、筐体に対する開閉扉の取り付けおよび取り外し作業が容易であるという有利な効果が得られる。
【００３３】
本発明によれば、抑え部材の先端部が開閉扉の一方の側端面から突出して取り付けられ、筐体底面に開閉扉の開扉時に抑え部材の先端部が当接する係止部材を設けたので、開閉扉の開扉時に抑え部材の先端部が係止部材と当接して開閉扉の開扉角度を規制するという有利な効果が得られる。
【００３４】
本発明によれば、筐体の前面開口部の底面および開閉扉の底面の裏面に開閉扉の開扉時に互いに接触する突起をそれぞれ設けたので、開閉扉が開いたときにそれぞれの突起が互いに摩擦係合して開閉扉を静止させるという有利な効果が得られる。
【図面の簡単な説明】
【図１】本発明が適用される壁掛形防災アンプの正面図
【図２】本発明による筐体と開閉扉との結合関係を示す斜視図
【図３】筐体と開閉扉と抑え部材との係合関係を示す分解斜視図
【図４】開閉扉の抑え部材と筐体の係止部材とが当接して開扉角度を規制している状態を示す要部平面図
【図５】筐体から開閉扉を取り外す場合の手順を示す説明図
【符号の説明】
１筐体
２開閉扉
４ａ，４ｂネジ
５抑え部材
５ａ底面
５ｂ立上り片
５ｃ係合孔
５ｄ，５ｅネジ孔
５ｆ先端部
５ｇ側面
６，７ネジ
１１枠体
１１ａ右内側面
１１ｂ天井面
１１ｃ底面
１１ｄ切り欠き
１１ｅ突起
１２ａ，１２ｂ固定軸
１３係止部材
２１上面
２１ａ係合孔
２２右端面
２２ａ切り欠き
２２ｂ後端面
２２ｃ長孔
２３底面
２３ａ切欠溝
２３ｂ後端面
２３ｃネジ孔
２３ｄ突起[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a support mechanism for a revolving door that can be easily attached to and detached from a housing attached to a wall of a building, and is suitable for application to, for example, an opening / closing door of a wall-mounted disaster prevention amplifier.
[0002]
[Prior art]
As a structure for attaching the revolving door to the housing attached to the wall of the building, for example, there is a wall-mounted disaster prevention amplifier. The wall-mounted disaster prevention amplifier is a broadcasting facility that is required to be installed in a building of a certain size or more according to the Fire Service Act together with the rack-type disaster prevention amplifier.
[0003]
The rack-type disaster prevention amplifier is constructed by mounting various units such as an operation unit, control unit, power supply unit, etc. in a vertically long rack, whereas the wall-mounted disaster prevention amplifier is directly integrated to the wall of the building It is relatively small in shape.
[0004]
As described above, the wall-mounted disaster prevention amplifier has a configuration in which a casing is fixed to a wall of a building and an opening / closing door is rotatably attached to the front surface of the casing. The open / close door forms an operation panel equipped with a microphone, emergency start switch, broadcast floor selection switch, and the like.
[0005]
[Problems to be solved by the invention]
By the way, the door of the conventional wall-mounted disaster prevention amplifier has a structure that can be pivotally attached to the inner surface of the housing with a hinge. Therefore, only one person can attach the door to the housing fixed to the wall during installation work. It was difficult. In addition, it is difficult to remove the door from the housing fixed to the wall even during maintenance.
[0006]
The present invention has been made to solve such a conventional problem, and an object thereof is to provide a support mechanism for a revolving door that can be easily attached to and detached from a housing.
[0007]
[Means for Solving the Problems]
The support mechanism for a revolving door according to the present invention is provided with an opening / closing door that opens and closes at the front opening portion of the housing with one side as a pivot, and the housing has a ceiling surface and a bottom surface on one side of the opening portion. The open / close door has an engagement hole that engages with the fixed shaft on the ceiling surface of the housing and a bottom surface of the housing on the bottom surface of the housing. Rotation having a notch groove having an opening on a side end face engaged with the fixed shaft, and a holding member having an engagement hole engaging with the fixed shaft on the bottom surface of the housing on the upper surface of the notch groove of the door In the door support mechanism, the front end of the restraining member is attached to protrude from one side end surface of the door, and a locking member is provided on the bottom surface of the housing so that the front end of the restraining member contacts when the door is opened. Or on the bottom surface of the front opening of the housing and the back surface of the bottom surface of the door, when the door is opened. A protrusion that contact is obtained respectively.
[0008]
ADVANTAGE OF THE INVENTION According to this invention, the support mechanism of the rotation door provided with the opening / closing door which is easy to attach and detach with respect to a housing | casing is obtained.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, an opening / closing door that opens and closes forward and backward with one side as a rotation fulcrum is provided at the front opening of the casing, and the casing has a ceiling surface on one side of the opening. A pair of fixed shafts are opposed to the bottom surface, and the open / close door has an engagement hole that engages with the fixed shaft of the ceiling surface of the housing on one side upper surface and a housing bottom surface on one side surface. A holding member having a notch groove having an opening on a side end face engaged with the fixed shaft on the bottom surface and having an engagement hole engaging with the fixed shaft on the bottom surface of the housing is attached to the upper surface of the notch groove of the door. In the support mechanism of the revolving door, the locking member is attached so that the front end portion of the restraining member protrudes from one side end surface of the opening and closing door, and the front end portion of the restraining member contacts the bottom surface of the housing when the opening and closing door is opened. It is provided .
[0010]
According to the present invention, the engagement hole on the upper surface of the door is fitted into the fixed shaft on the ceiling surface of the housing, the notch groove of the door is fitted into the fixed shaft on the bottom surface of the housing from the opening, and the holding member is attached to the door door. The door can be attached to the housing by being fixed on the bottom surface.
[0012]
In addition, according to the present invention, when the opening / closing door is opened, the front end portion of the restraining member comes into contact with the locking member to restrict the opening angle of the opening / closing door.
[0013]
According to a second aspect of the present invention, an opening / closing door that opens and closes forward and backward with one side as a rotation fulcrum is provided at the front opening of the casing, and the casing has a ceiling surface on one side of the opening. A pair of fixed shafts are opposed to the bottom surface, and the open / close door has an engagement hole that engages with the fixed shaft of the ceiling surface of the housing on one side upper surface and a housing bottom surface on one side surface. A holding member having a notch groove having an opening on a side end face engaged with the fixed shaft on the bottom surface and having an engagement hole engaging with the fixed shaft on the bottom surface of the housing is attached to the upper surface of the notch groove of the door. In the rotating door support mechanism, the bottom surface of the front opening of the housing and the back surface of the bottom surface of the door are provided with protrusions that contact each other when the door is opened.
[0014]
According to the present invention, a revolving door having an opening / closing door that can be easily attached to and detached from the housing is obtained , and when the opening / closing door is opened, the projections are frictionally engaged with each other to make the opening / closing door stationary. Have
[0015]
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0016]
(Embodiment 1)
FIG. 1 is a front view of a wall-mounted disaster prevention amplifier to which the present invention is applied, in which an opening / closing door 2 having an operation panel configuration is attached to the front surface of a housing 1 fixed to a wall (not shown) of a building. Is shown.
[0017]
On the surface of the open / close door 2, in addition to the microphone 3, various operators such as an emergency start switch, an emergency recovery switch, a fire broadcast switch, a non-fire broadcast switch, and a broadcast floor selection switch are equipped. In order to open the door 2, the screws 4 a and 4 b attached to the left end are removed, and the left end of the door 2 is pulled forward, so that the right end can be opened as a rotation fulcrum.
[0018]
FIG. 2 is a perspective view showing the first embodiment of the support mechanism for the revolving door according to the present invention, and is a diagram showing the coupling relationship between the housing 1 and the door 2. In the figure, the housing 1 has a configuration in which fixed shafts 12a and 12b are erected on the ceiling surface 11b and the bottom surface 11c of the frame 11 at a certain distance in the lateral direction from the right inner surface 11a of the front frame 11. In addition, a planar locking member 13 that is perpendicular to the rear of the frame 11 is provided behind the fixed shaft 12b.
[0019]
The opening / closing door 2 has an engagement hole 21a formed in the upper surface 21 at a certain distance in the lateral direction from the right end surface 22, and a notch groove 23a having an opening on the right end surface 22 side in the bottom surface 23. Has been. The engagement hole 21 a engages with the fixed shaft 12 a of the housing 1, and the notch groove 23 a engages with the fixed shaft 12 b of the housing 1. Thus, the opening / closing door 2 is attached to the housing 1 so as to be rotatable.
[0020]
Further, a notch 22a is provided below the right end surface 22 of the open / close door 2 as a relief for the fixed shaft 12b when the fixed shaft 12b and the notch groove 23a are engaged. In addition, on the bottom surface 23 of the opening / closing door 2, the pressing member 5 is attached from above after the engagement between the fixed shaft 12b and the cutout groove 23a.
[0021]
FIG. 3 is an exploded perspective view showing the engagement relationship of the housing 1, the opening / closing door 2, and the holding member 5. The holding member 5 has a bottom surface 5a and a rising piece 5b. An engaging hole 5c is formed in the bottom surface 5a, and screw holes 5d and 5e are formed in the rising piece 5b.
[0022]
The holding member 5 is attached in such a manner that the bottom surface 5a is placed on the bottom surface 23 of the door 2 and the tip of the fixed shaft 12b is inserted into the engagement hole 5c. As a result, the opening of the cutout groove 23a is blocked by the bottom surface 5a of the restraining member 5, and the fixed shaft 12b can be prevented from coming out of the cutout groove 23a.
[0023]
In addition, the holding member 5 is positioned with a screw hole 23 c formed in a rear end surface 23 b of which the screw hole 5 d rises from the bottom surface 23 of the open / close door 2 and is fixed to the open / close door 2 with screws 6. Further, the holding member 5 is positioned with a long hole 22 c formed in a rear end surface 22 b of which the screw hole 5 e rises from the right end surface 22 of the open / close door 2, and is fixed to the open / close door 2 with a screw 7.
[0024]
The holding member 5 is attached in a state where the front end portion 5f protrudes outward from the right end surface 22 of the open / close door 2, and the side surface 5g of the front end portion 5f contacts the locking member 13 when the open / close door 2 is opened. It plays the role of regulating the opening angle of the door 2.
[0025]
FIG. 4 shows a state in which when the opening / closing door 2 is opened, the locking member 13 of the housing 1 and the side surface 5g of the front end portion 5f of the holding member 5 are in contact with each other to regulate the opening angle of the opening / closing door 2. It is a principal part top view shown.
[0026]
As is apparent from this figure, the opening angle of the door 2 can be adjusted by changing the cut-off angle θ of the side surface 5g. In order to prevent the front end portion 5f of the holding member 5 from coming into contact with the frame body 11 of the housing 1 when the open / close door 2 is closed, a notch 11d is provided in the lower portion of the inner side surface 11a.
[0027]
Further, as a simple locking mechanism for stopping the door 2 when the door 2 is opened, a protrusion 11e is provided on the bottom surface 11c of the frame 11 adjacent to the fixed shaft 12b, and the bottom surface 23 of the door 2 is opened. A protrusion 23d is provided adjacent to the notch groove 23a. Thereby, when the opening / closing door 2 is opened, the projections 11e and 23d can be frictionally engaged to make the opening / closing door 2 stationary.
[0028]
In this configuration, in order to attach the opening / closing door 2 to the housing 1 fixed to the wall at the time of installation work, the opening / closing door 2 is made substantially orthogonal to the front opening of the housing 1 and opened / closed to the fixed shaft 12a of the housing 1 The engagement hole 21a of the door 2 is fitted, and the notch groove 23a is fitted into the fixed shaft 12b of the housing 1 from the opening.
[0029]
Next, the holding member 5 is placed on the bottom surface 23 of the open / close door 2. At this time, the fixed shaft 12b is placed in a state where the tip of the fixed shaft 12b penetrates the engagement hole 5c. Then, the screw hole 23c of the opening / closing lid 2 and the screw hole 5d of the holding member 5 are positioned and fixed by the screw 6, and the long hole 22c of the opening / closing lid 2 and the screw hole 5e of the holding member 5 are positioned and screw 7 Secure with.
[0030]
Conversely, when the door 2 is removed from the housing 1 for maintenance or the like, the screws 6 and 7 are removed with the door 2 opened, and the restraining member 5 is moved upward from the fixed shaft 12b as shown in FIG. Pull out. Even if the restraining member 5 is removed, the door 2 acts in the direction A under its own weight, so that the door 2 can be secured without dropping off.
[0031]
Next, when the lower part of the door 2 is pulled out in the B direction with the fixed shaft 12a as a fulcrum, the fixed shaft 12b is detached from the notch groove 23a, and then the engagement hole 21a is detached from the fixed shaft 12a. Can be removed from.
[0032]
【The invention's effect】
According to the present invention, the engagement hole on the upper surface of the door is fitted into the fixed shaft on the ceiling surface of the housing, the notch groove of the door is fitted into the fixed shaft on the bottom surface of the housing from the opening, and the holding member is opened and closed. Since the opening / closing door can be attached to the housing by being fixed on the bottom surface, an advantageous effect that the attaching / detaching operation of the opening / closing door to / from the housing is easy can be obtained.
[0033]
According to the present invention, since the front end portion of the holding member protrudes from one side end surface of the opening / closing door, and the locking member is provided on the bottom surface of the housing, the end portion of the holding member abuts when the opening / closing door is opened. An advantageous effect is obtained in that when the opening / closing door is opened, the front end of the holding member abuts on the locking member to regulate the opening angle of the opening / closing door.
[0034]
According to the present invention, the protrusions that contact each other when the opening / closing door is opened are provided on the bottom surface of the front opening of the housing and the back surface of the bottom surface of the opening / closing door. An advantageous effect is obtained in that the open / close door is made stationary by frictional engagement.
[Brief description of the drawings]
FIG. 1 is a front view of a wall-mounted disaster prevention amplifier to which the present invention is applied. FIG. 2 is a perspective view showing a coupling relationship between a casing and an open / close door according to the present invention. FIG. 4 is a main part plan view showing a state in which the opening / closing door holding member and the locking member of the housing are in contact with each other to regulate the opening angle. Explanatory drawing showing the procedure for removing the door from the body 【Explanation of symbols】
DESCRIPTION OF SYMBOLS 1 Case 2 Opening / closing door 4a, 4b Screw 5 Holding member 5a Bottom face 5b Standing piece 5c Engagement hole 5d, 5e Screw hole 5f Tip part 5g Side face 6,7 Screw 11 Frame 11a Right inner side face 11b Ceiling face 11c Bottom face 11d Cutting Notch 11e Protrusion 12a, 12b Fixed shaft 13 Locking member 21 Upper surface 21a Engagement hole 22 Right end surface 22a Notch 22b Rear end surface 22c Long hole 23 Bottom surface 23a Notch groove 23b Rear end surface 23c Screw hole 23d Protrusion

Claims

An opening / closing door that opens and closes forward and backward with one side as a pivot is provided at the front opening of the housing,
The housing has a pair of fixed shafts facing the ceiling surface and bottom surface on the one side of the opening,
The opening / closing door engages with an engagement hole that engages with a fixed shaft of the ceiling surface of the casing on the upper surface of the one side, and with a fixed shaft of the bottom surface of the casing on the bottom surface of the one side. And a notch groove having an opening on the side end surface thereof,
In the support mechanism of the revolving door in which a holding member having an engagement hole that engages with the fixed shaft of the bottom surface of the housing is attached to the upper surface of the notch groove of the open / close door .
A locking member is provided in which a front end portion of the holding member protrudes from one side end face of the opening / closing door, and a front end portion of the holding member contacts the bottom surface of the housing when the opening / closing door is opened. A revolving door support mechanism.

An opening / closing door that opens and closes forward and backward with one side as a pivot is provided at the front opening of the housing,
The housing has a pair of fixed shafts facing the ceiling surface and bottom surface on the one side of the opening,
The opening / closing door engages with an engagement hole that engages with a fixed shaft of the ceiling surface of the casing on the upper surface of the one side, and with a fixed shaft of the bottom surface of the casing on the bottom surface of the one side. And a notch groove having an opening on the side end surface thereof,
In the support mechanism of the revolving door in which a holding member having an engagement hole that engages with the fixed shaft of the bottom surface of the housing is attached to the upper surface of the notch groove of the open / close door.
Wherein the rear surface of the bottom surface of the bottom and door of the front opening of the housing, the support mechanism times Utatetobira, characterized in that the protrusions contact each other when the door opening of the door is provided, respectively.