JP6889556B2 - Fixed structure of inspection port outer frame - Google Patents

Fixed structure of inspection port outer frame Download PDF

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JP6889556B2
JP6889556B2 JP2017001379A JP2017001379A JP6889556B2 JP 6889556 B2 JP6889556 B2 JP 6889556B2 JP 2017001379 A JP2017001379 A JP 2017001379A JP 2017001379 A JP2017001379 A JP 2017001379A JP 6889556 B2 JP6889556 B2 JP 6889556B2
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inspection port
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有弘 永谷
有弘 永谷
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Naka Corp
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Description

本発明は点検口外枠の固定構造に関するものである。 The present invention relates to a fixed structure of an inspection port outer frame.

天井点検口等の点検口外枠を野縁等の天井支持材に直接固定する点検口外枠の固定構造としては、特許文献１の図１６に記載のものが知られている。この従来例において、点検口外枠は外枠コーナ具により枠片を矩形枠状に連結して形成され、木ネジ等を使用して天井支持材に固定される。 As a fixing structure of the inspection port outer frame for directly fixing the inspection port outer frame such as the ceiling inspection port to the ceiling support material such as the field edge, the one described in FIG. 16 of Patent Document 1 is known. In this conventional example, the inspection port outer frame is formed by connecting the frame pieces in a rectangular frame shape with an outer frame corner tool, and is fixed to the ceiling support material by using wood screws or the like.

外枠コーナ具を装着するための嵌込み溝は、枠片の外壁部に断面Ｌ字形状の突条を突設することにより形成されており、この状態で外枠を天井支持材にネジ止めすると、枠片は木ネジの頭部により天井支持材側に引き込まれ、変形してしまう虞があるために、天井支持材と外枠との間にスペーサ部材が介装される。 The fitting groove for mounting the outer frame corner tool is formed by projecting a ridge having an L-shaped cross section on the outer wall of the frame piece, and in this state, the outer frame is screwed to the ceiling support material. Then, the frame piece is pulled toward the ceiling support material side by the head of the wood screw and may be deformed. Therefore, a spacer member is interposed between the ceiling support material and the outer frame.

特許第３３１１６８６号公報Japanese Patent No. 3311686

しかし、上述した従来例において、点検口外枠７の固定に際してスペーサ部材を介装する作業は手間がかかり点検口の設置作業性を低下させることとなってしまうという欠点がある。 However, in the above-mentioned conventional example, there is a drawback that the work of interposing the spacer member when fixing the inspection port outer frame 7 is troublesome and reduces the installation workability of the inspection port.

本発明は、以上の欠点を解消すべくなされたものであって、点検口の設置作業性を向上させることのできる点検口外枠の固定構造を提供することを目的とする。 The present invention has been made to eliminate the above drawbacks, and an object of the present invention is to provide a fixed structure of an inspection port outer frame capable of improving the installation workability of the inspection port.

本発明によれば上記目的は、
点検口設置面１に開設した点検用開口２の対向する少なくとも一対の辺縁に沿って配設される枠支持材３と、
円筒部４が軸部５の呼び径に比して大きな段付きネジ６により前記枠支持材３に連結される点検口外枠７とを有し、
前記段付きネジ６は円筒部４の端面を枠支持材３に当接させて該枠支持材３へのねじ込み深さが規制され、点検口外枠７への段付きネジ６による引き込み力が規制され、
前記段付きネジ６は、円筒部４近傍のネジピッチが他の部位に比して小さく形成される点検口外枠の固定構造を提供することにより達成される。 According to the present invention, the above object is
A frame support member 3 arranged along at least a pair of opposite edges of the inspection opening 2 opened on the inspection port installation surface 1 and
The cylindrical portion 4 has an inspection port outer frame 7 which is connected to the frame support member 3 by a stepped screw 6 which is larger than the nominal diameter of the shaft portion 5.
In the stepped screw 6, the end face of the cylindrical portion 4 is brought into contact with the frame support member 3, the screwing depth into the frame support member 3 is regulated, and the pulling force of the stepped screw 6 into the inspection port outer frame 7 is regulated. Being done
The stepped screw 6 is achieved by providing a fixing structure of an inspection port outer frame in which a screw pitch in the vicinity of the cylindrical portion 4 is formed to be smaller than that of other portions.

本発明において、点検口外枠７は、天井壁面、あるいは壁壁面等の点検口設置面１に開設した点検用開口２に沿って配設される枠支持材３に直接ねじ止めされる。 In the present invention, the inspection port outer frame 7 is directly screwed to the frame support member 3 arranged along the inspection opening 2 opened in the inspection port installation surface 1 such as the ceiling wall surface or the wall wall surface.

枠支持材３としては、天井壁面等を支持する野縁等の壁面支持材を利用したり、あるいは壁面支持材間に架設等した補助支持材を利用することができる。 As the frame support material 3, a wall surface support material such as a field edge that supports the ceiling wall surface or the like can be used, or an auxiliary support material erected between the wall surface support materials can be used.

ねじ止めにはネジの呼び径に対して大径の円筒部４を備えた段付きネジ６が使用され、段付きネジ６の円筒部４の長さは、概ね点検口外枠７と枠支持材３との間隙に等しく形成されており、点検口外枠７を段付きネジ６によりねじ止めし、円筒部４の先端が点検口外枠７の外壁に当接した状態で点検口外枠７と枠支持材３との間には円筒部４の長さに相当する空隙が確保される。 A stepped screw 6 having a cylindrical portion 4 having a diameter larger than the nominal diameter of the screw is used for screwing, and the length of the cylindrical portion 4 of the stepped screw 6 is approximately the inspection port outer frame 7 and the frame support material. The inspection port outer frame 7 is screwed with a stepped screw 6 so as to be equal to the gap with the inspection port 3, and the inspection port outer frame 7 and the frame are supported in a state where the tip of the cylindrical portion 4 is in contact with the outer wall of the inspection port outer frame 7. A gap corresponding to the length of the cylindrical portion 4 is secured between the material 3 and the material 3.

また、上記円筒部４は、ねじ止め操作時に該円筒部４の先端が枠支持材３に当接した際に、さらなるねじ込み操作を規制し、あるいはその急激な抵抗の増加により作業者に設定値としてのねじ込み深さを知らせることが可能になる。 Further, when the tip of the cylindrical portion 4 comes into contact with the frame support member 3 during the screwing operation, the cylindrical portion 4 restricts a further screwing operation or a value set by the operator due to a sudden increase in resistance thereof. It becomes possible to inform the screwing depth as.

この結果、点検口外枠７のねじ止め作業時にねじ込み深さが過大に深くなって点検口外枠７にネジ頭部６ａを介して大きな荷重が枠外方に負荷されて点検口外枠７が変形してしまうことを確実に防止することができる。 As a result, when the inspection port outer frame 7 is screwed, the screwing depth becomes excessively deep, and a large load is applied to the inspection port outer frame 7 via the screw head 6a to the outside of the frame, and the inspection port outer frame 7 is deformed. It is possible to surely prevent it from being stored.

また、ねじ込み深さの制御のためにカラー、スペーサ等を介装する必要がないために、取り付け作業性を低下させることもない。 Further, since it is not necessary to insert a collar, a spacer, or the like for controlling the screwing depth, the mounting workability is not deteriorated.

さらに、他の態様として、
前記枠支持材３は薄鋼板により形成されるとともに、
前記段付きネジ６は、円筒部４近傍のネジピッチが他の部位に比して小さく形成される点検口外枠７の固定構造を構成することができる。 Furthermore, as another aspect,
The frame support material 3 is made of a thin steel plate and
The stepped screw 6 can form a fixed structure of the inspection port outer frame 7 in which the screw pitch in the vicinity of the cylindrical portion 4 is formed to be smaller than that of other portions.

このように構成すると、枠支持材３が薄鋼板により形成される場合、円筒部４近傍にネジピッチが他の部位に比して小さな細ピッチ部６ｂを備えた段付きネジ６を使用すると、枠支持材３へのネジ部の噛み込みが良好になるために、枠支持材３にバーリング加工を施すことなく必要な締結強度が確保でき、組み付け作業性、および固定信頼性が向上する。 With this configuration, when the frame support member 3 is formed of a thin steel plate, if a stepped screw 6 having a fine pitch portion 6b having a screw pitch smaller than that of other portions is used in the vicinity of the cylindrical portion 4, the frame can be used. Since the threaded portion is better engaged with the support member 3, the required fastening strength can be ensured without burring the frame support member 3, and the assembling workability and fixing reliability are improved.

また、上記目的を達成するための本発明の他の態様として、
前記段付きネジ６はタッピンネジとして形成されるとともに、
前記枠支持材３は、前記段付きネジ６が下穴を開設することなくねじ込み可能な薄鋼板を矩形枠形状に折り曲げて形成される点検口外枠７の固定構造を構成することができる。 In addition, as another aspect of the present invention for achieving the above object,
The stepped screw 6 is formed as a tapping screw and is also formed.
The frame support member 3 can form a fixed structure of an inspection port outer frame 7 formed by bending a thin steel plate into which the stepped screw 6 can be screwed into into a rectangular frame shape without forming a pilot hole.

本発明によれば、枠支持材３はタッピンネジをドリルねじのように下穴なしでねじ込むこむことができる程度に十分薄肉（０．４ｍｍ程度）の鋼板により形成され、薄肉化による強度、剛性低下が断面を閉じた矩形枠形状とすることにより補償される。 According to the present invention, the frame support member 3 is formed of a steel plate having a thickness sufficiently thin (about 0.4 mm) so that a tapping screw can be screwed in without a pilot hole like a drill screw, and the strength and rigidity are reduced due to the thinning. Is compensated by forming a rectangular frame shape with a closed cross section.

したがって本発明において、下穴を明ける工程を省くことができる上に、点検口の支持強度も維持することが可能になる。 Therefore, in the present invention, the step of drilling a pilot hole can be omitted, and the support strength of the inspection port can be maintained.

さらに、
前記点検口外枠７は、外枠片８をコーナ金具９により矩形枠状に連結して形成されるとともに、
前記段付きネジ６の円筒部４によるスペースが、前記点検口外枠２に形成される前記コーナ金具９の装着部１０の収容スペースに使用される点検口外枠７の固定構造を構成した場合には、コーナ金具９の装着部１０を点検口外枠７の外壁部に形成することができるために、点検口外枠７内部のスペースを有効に利用することができる。 further,
The inspection port outer frame 7 is formed by connecting outer frame pieces 8 with corner metal fittings 9 in a rectangular frame shape, and at the same time.
When the space provided by the cylindrical portion 4 of the stepped screw 6 constitutes the fixed structure of the inspection port outer frame 7 used for the accommodation space of the mounting portion 10 of the corner metal fitting 9 formed on the inspection port outer frame 2. Since the mounting portion 10 of the corner metal fitting 9 can be formed on the outer wall portion of the inspection port outer frame 7, the space inside the inspection port outer frame 7 can be effectively used.

本発明によれば、点検口外枠７と枠支持材３との間隙確保のための格別の作業が不要となるために、点検口の設置作業性を向上させることができる。 According to the present invention, since it is not necessary to perform a special work for securing a gap between the inspection port outer frame 7 and the frame support member 3, it is possible to improve the installation workability of the inspection port.

本発明を示す図で、（ａ）は断面図、（ｂ）は（ａ）の要部拡大図である。In the figure showing the present invention, (a) is a cross-sectional view, and (b) is an enlarged view of a main part of (a). 天井部への点検口外枠の取り付け状態を示す斜視図である。It is a perspective view which shows the attachment state of the inspection port outer frame to the ceiling part. 段付きネジを示す図で、（ａ）は正面図、（ｂ）は右側面図である。It is a figure which shows the stepped screw, (a) is a front view, (b) is a right side view. 点検口外枠の取り付け工程を示す図で、（ａ）は段付きネジのねじ込み操作を示す図、（ｂ）は連結完了状態を示す図である。It is a figure which shows the attachment process of the inspection port outer frame, (a) is a figure which shows the screwing operation of a step screw, (b) is a figure which shows the connection completion state.

図１以下に天井点検口に適用された本発明の実施の形態を示す。 FIG. 1 and below show an embodiment of the present invention applied to a ceiling inspection port.

まず、本例における天井は、図２に示すように、図外の鋼製ライナーにより支持される壁面支持材１１により天井面形成板材１２を支持して形成される所謂軽量天井システムであり、点検口設置面１としての天井面には、天井面形成板材１２を切り抜いて点検用開口２が開設される。 First, as shown in FIG. 2, the ceiling in this example is a so-called lightweight ceiling system formed by supporting the ceiling surface forming plate material 12 by a wall surface supporting material 11 supported by a steel liner (not shown), and is inspected. An inspection opening 2 is opened on the ceiling surface as the mouth installation surface 1 by cutting out the ceiling surface forming plate material 12.

本例において壁面支持材１１は、板厚が０．４ｍｍ程度の亜鉛メッキ薄鋼板を折り曲げることにより、断面が矩形枠形状を有する長尺材であり、上記点検用開口２は、上記壁面支持材１１に沿って開設され、必要に応じ、点検用開口２に沿って補助的な壁面支持材１１が配設される。 In this example, the wall surface support material 11 is a long material having a rectangular frame shape in cross section by bending a galvanized thin steel plate having a plate thickness of about 0.4 mm, and the inspection opening 2 is the wall surface support material. An auxiliary wall surface support member 11 is arranged along the inspection opening 2 as needed.

この点検用開口２を閉塞する天井点検口は、図１に示すように、点検用開口２内に固定される点検口外枠７と、点検口外枠７内に開閉操作可能に連結される内枠１３とを有する。内枠１３には蓋板１３ａが固定され、内枠１３を閉塞状態にすることにより点検口外枠７内の開口が閉塞される。 As shown in FIG. 1, the ceiling inspection port that closes the inspection opening 2 is an inspection port outer frame 7 fixed in the inspection opening 2 and an inner frame that is openably and closably connected to the inspection port outer frame 7. 13 and. A lid plate 13a is fixed to the inner frame 13, and the opening in the inspection port outer frame 7 is closed by closing the inner frame 13 in a closed state.

内枠１３と点検口外枠７とは各々アルミニウム材等により形成される外枠片８、内枠片１３ｂを金属片をＬ字形状に折り曲げたコーナ金具９により矩形枠形状に枠組みして形成される。コーナ金具９を装着するために、外枠片８、内枠材１３ｂには枠組み状態において外壁となる壁面の上下対向位置をＬ字形状に突出させて装着部１０が形成され、コーナ金具９は、隣接する壁面に対応する翼片を装着部１０に嵌合させた後、枠内方からコーナ金具９を外方に向けて押し込んで固定される。 The inner frame 13 and the inspection port outer frame 7 are formed by frame the outer frame piece 8 and the inner frame piece 13b formed of an aluminum material or the like into a rectangular frame shape by a corner metal fitting 9 obtained by bending a metal piece into an L shape, respectively. Rectangle. In order to mount the corner metal fitting 9, the outer frame piece 8 and the inner frame material 13b are formed with the mounting portion 10 by projecting the vertically opposed positions of the wall surface, which is the outer wall in the frame state, into an L shape, and the corner metal fitting 9 is formed. After fitting the wing pieces corresponding to the adjacent wall surfaces to the mounting portion 10, the corner metal fittings 9 are pushed outward from the inside of the frame to be fixed.

本例において、点検口外枠７は上記壁面支持材１１を枠支持材３として利用し、該枠支持材３に直接ねじ止めされる。図４に示すように、点検口外枠７には天井裏空間に配置される野縁受け等から吊り金具を使用して吊り下げる場合の吊り金具装着孔を兼用するビス挿通孔７ａが開設されており、ねじ止めは、段付きネジ６をビス挿通孔７ａから挿通させることにより行われる。 In this example, the inspection port outer frame 7 uses the wall surface support material 11 as the frame support material 3 and is directly screwed to the frame support material 3. As shown in FIG. 4, the inspection port outer frame 7 is provided with a screw insertion hole 7a that also serves as a hanging bracket mounting hole when hanging using a hanging bracket from a field edge receiver or the like arranged in the space behind the ceiling. The ceiling screw is screwed by inserting the stepped screw 6 through the screw insertion hole 7a.

段付きネジ６は、図３に示すように、先端が鋭利な尖り先の皿頭タッピンネジであり、ネジ頭部６ａと軸部５との間には点検口外枠７と枠支持材３との間隙、正確には、枠支持材３と点検口外枠７との間に、該点検口外枠７に形成されるコーナ金具９の装着部１０を収容可能な長さで軸部５の呼び径に比して大径の円筒部４が形成される。 As shown in FIG. 3, the stepped screw 6 is a flat head tapping screw with a sharp tip, and an inspection port outer frame 7 and a frame support member 3 are provided between the screw head 6a and the shaft portion 5. The gap, to be exact, between the frame support member 3 and the inspection port outer frame 7, has a length that can accommodate the mounting portion 10 of the corner metal fitting 9 formed on the inspection port outer frame 7, and has a nominal diameter of the shaft portion 5. A cylindrical portion 4 having a relatively large diameter is formed.

また、段付きネジ６の軸部５には、円筒部４から点検口外枠７の板厚よりも長い程度にわたり、他の範囲に比してネジピッチが狭い細ピッチ部６ｂが形成される。 Further, on the shaft portion 5 of the stepped screw 6, a fine pitch portion 6b is formed from the cylindrical portion 4 to a degree longer than the plate thickness of the inspection port outer frame 7 and the screw pitch is narrower than other ranges.

したがって本例において、段付きネジ６の軸部５の先端部が尖り先であるために、ねじ込み操作開始時に操作力を点接触する枠支持材３に穿孔力として効率的に伝えることができるとともに、枠支持材３は、このようにして発生する穿孔力により容易に穿孔されるように十分な小さな板厚で形成されるために、枠支持材３に予め下穴を明けることなくねじ込み操作を行うことができる。 Therefore, in this example, since the tip of the shaft portion 5 of the stepped screw 6 has a sharp tip, the operating force can be efficiently transmitted to the frame support member 3 in point contact at the start of the screwing operation as a drilling force. Since the frame support member 3 is formed with a plate thickness sufficiently small so that the frame support member 3 can be easily drilled by the drilling force generated in this way, the screwing operation can be performed without drilling a pilot hole in the frame support member 3 in advance. It can be carried out.

さらに、段付きネジ６の先端部は通常のタッピンネジと同等のネジピッチにより形成されているために、一旦先端が枠支持材３に入り込むと、その後、効率的に、かつ確実なねじ込み操作を行うことができる。 Further, since the tip of the stepped screw 6 is formed with a screw pitch equivalent to that of a normal tapping screw, once the tip enters the frame support member 3, an efficient and reliable screwing operation is performed thereafter. Can be done.

また、段付きネジ６は頭部６ａと軸部５との間に円筒部４を備えているために、円筒部４先端が枠支持材３に当接したときにねじ込み操作が不可能になり、あるいはねじ込み操作に対する抵抗が大きくなるために、ねじ込み深さが過大になることを確実に防ぐことができる。この結果、ねじ込み深さが過大なために点検口外枠７が変形して外向きの荷重が負荷されて点検外枠が変形してしまう虞がなくなる。 Further, since the stepped screw 6 is provided with the cylindrical portion 4 between the head portion 6a and the shaft portion 5, the screwing operation becomes impossible when the tip of the cylindrical portion 4 comes into contact with the frame support member 3. Or, since the resistance to the screwing operation becomes large, it is possible to surely prevent the screwing depth from becoming excessive. As a result, there is no possibility that the inspection port outer frame 7 is deformed due to the excessive screwing depth and an outward load is applied to deform the inspection outer frame.

さらに、段付きネジ６には細ピッチ部６ｂが形成されるために、円筒部４の先端が枠支持材３に当接した状態、すなわちねじ込み操作が完了した状態で枠支持材３とネジ条との接触長が長くなるために、枠支持材３の板厚が薄く、かつ、バーリング加工等を施さなくとも必要な固定強度を確保することができる。 Further, since the fine pitch portion 6b is formed on the stepped screw 6, the frame support member 3 and the screw strip are in a state where the tip of the cylindrical portion 4 is in contact with the frame support member 3, that is, when the screwing operation is completed. Since the contact length with the frame is long, the thickness of the frame support member 3 is thin, and the required fixing strength can be secured without performing burring or the like.

なお、以上においては天井点検口を例にとって本発明を説明したが、壁に設置する壁点検口に適用することも可能である。
また、以上において枠支持材３を薄鋼板により構成した例を記載したが、木材等によってもよい。 Although the present invention has been described above by taking the ceiling inspection port as an example, it can also be applied to a wall inspection port installed on a wall.
Further, although the example in which the frame support material 3 is made of a thin steel plate is described above, it may be made of wood or the like.

１ 点検口設置面
２ 点検用開口
３ 枠支持材
４ 円筒部
５ 軸部
６ 段付きネジ
７ 点検口外枠
８ 外枠片
９ コーナ金具
１０ 装着部 1 Inspection port installation surface 2 Inspection opening 3 Frame support material 4 Cylindrical part 5 Shaft part 6 Stepped screw 7 Inspection port outer frame 8 Outer frame piece 9 Corner metal fittings 10 Mounting part

Claims (3)

点検口設置面に開設した点検用開口の対向する少なくとも一対の辺縁に沿って配設される枠支持材と、
円筒部が軸部の呼び径に比して大きな段付きネジにより前記枠支持材に連結される点検口外枠とを有し、
前記段付きネジは円筒部の端面を枠支持材に当接させて該枠支持材へのねじ込み深さが規制され、点検口外枠への段付きネジによる引き込み力が規制され、
前記段付きネジは、円筒部近傍のネジピッチが他の部位に比して小さく形成される点検口外枠の固定構造。 A frame support material arranged along at least a pair of opposite edges of the inspection opening opened on the inspection port installation surface, and
The cylindrical portion has an inspection port outer frame that is connected to the frame support material by a stepped screw that is larger than the nominal diameter of the shaft portion.
In the stepped screw, the end face of the cylindrical portion is brought into contact with the frame support material to regulate the screwing depth to the frame support material, and the pulling force of the stepped screw to the inspection port outer frame is regulated.
The stepped screw has a fixed structure of an inspection port outer frame in which the screw pitch near the cylindrical portion is formed to be smaller than that of other portions. 前記段付きネジはタッピンネジとして形成されるとともに、
前記枠支持材は、前記段付きネジが下穴を開設することなくねじ込み可能な薄鋼板を矩形枠形状に折り曲げて形成される請求項１記載の点検口外枠の固定構造。 The stepped screw is formed as a tapping screw and is also
The fixed structure of the inspection port outer frame according to claim 1, wherein the frame support material is formed by bending a thin steel plate into which the stepped screw can be screwed into into a rectangular frame shape. 前記点検口外枠は、外枠片をコーナ金具により矩形枠状に連結して形成されるとともに、
前記段付きネジの円筒部によるスペースが、前記点検口外枠の外壁面に形成される前記コーナ金具の装着部の収容スペースに使用される請求項１または２記載の点検口外枠の固定構造。 The inspection port outer frame is formed by connecting outer frame pieces in a rectangular frame shape with corner metal fittings, and at the same time.
The fixing structure of the inspection port outer frame according to claim 1 or 2, wherein the space formed by the cylindrical portion of the stepped screw is used as a storage space for the mounting portion of the corner metal fitting formed on the outer wall surface of the inspection port outer frame.
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