JP4588187B2

JP4588187B2 - Telescopic support device

Info

Publication number: JP4588187B2
Application number: JP2000317316A
Authority: JP
Inventors: 正夫東本
Original assignee: サンマックス株式会社
Priority date: 2000-10-18
Filing date: 2000-10-18
Publication date: 2010-11-24
Anticipated expiration: 2020-10-18
Also published as: JP2002124121A

Description

【０００１】
【発明の属する技術分野】
本発明は、複数の筒部材が入れ子式に摺動して伸縮可能に構成された支持装置に関し、例えばスタジオにおいて照明器具などを天井から吊り下げるために利用される。
【０００２】
【従来の技術】
従来より、スタジオにおいて照明器具などを天井から吊り下げるためにワイヤが用いられている。
【０００３】
つまり、天井近くに設けたビームに多数のウインチおよび滑車を設置し、ワイヤの先端に取り付けた照明器具を、滑車を介し、ウインチによって巻き上げたり降ろしたりする。
【０００４】
【発明が解決しようとする課題】
しかし、ワイヤのみで吊り下げた場合には、吊り下げた照明器具が左右に揺れることがあり、揺れた場合にはそれがなかなか止まらないという問題がある。
【０００５】
そこで、複数の筒部材を入れ子式に摺動させたテレスコープ式の支持装置を用いることが考えられる。テレスコープ式の支持装置では、複数の筒部材が摺動するので、摺動部材が摩耗した場合に騒音が発生したり円滑に摺動しなくなる可能性がある。
【０００６】
したがって、摺動部分の定期的な点検や摩耗時の交換などのメンテナンスが容易であることが望まれる。特に、吊り下げたままの状態で、筒部材をその外側の筒部材から抜き出すことが可能なことが望ましい。
【０００７】
本発明は、上述の問題に鑑みてなされたもので、吊り下げたままの状態で筒部材をその外側の筒部材から抜き出すことを可能としたメンテナンスが容易な伸縮可能な支持装置を提供することを目的とする。
【０００８】
本発明に係る装置は、複数の筒部材が入れ子式に摺動して伸縮可能に構成された支持装置であって、前記複数の筒部材のうちの少なくとも最も内側に挿入された筒部材を除く筒部材の端部にはカバー部材がそれぞれ設けられており、前記カバー部材は、当該カバー部材が設けられた前記筒部材の端部外周面に嵌まり込んだリング状の外嵌部と、前記外嵌部に連続して一体的に形成され、当該筒部材の内周面よりも内側に突出する係止部とを有し、前記外嵌部に設けられたねじ穴にねじ込まれ、当該筒部材に設けられた穴に嵌入するねじピンによって、当該筒部材と軸方向に係合して当該カバー部材の当該筒部材からの抜け止めがなされ、かつ前記ねじピンを取り外すことによって当該カバー部材を当該筒部材から取り外すことができるようになっており、当該カバー部材が設けられた当該筒部材の直ぐ内側に挿入された筒部材の外周面には、当該カバー部材の係止部に軸方向に当接して抜け止めを図るための係止部材が設けられており、前記係止部には、当該係止部に設けられたねじ穴にねじ込まれ、当該係止部よりも内側に突出して当該カバー部材が設けられた当該筒部材の直ぐ内側に挿入された筒部材の外周面と摺接するとともに、ねじ込み位置を調整することによってその摺接状態を調整することの可能な摺動ねじ部材が設けられている。
【００１０】
さらに好ましくは、前記複数の筒部材のそれぞれは断面が四角形であり、前記ねじピンは、各面においてその両側に２つずつ設けられ、前記係止部材は、各面においてその中央部に１つずつ設けられている。
【００１１】
さらに好ましくは、前記カバー部材が設けられた前記筒部材の直ぐ内側に挿入された筒部材の外周面の奥側には、当該カバー部材が設けられた筒部材の内周面と摺接する摺動部材が、各面において一方の端部側に片寄った位置であって当該カバー部材が設けられた筒部材に設けられた係止部材と干渉しない位置に設けられている。
【００１２】
【発明の実施の形態】
図１は本発明に係る支持装置１の収縮時における正面図、図２は支持装置１の下端部を拡大して示す断面図、図３は筒部材１１ａ〜１１ｆの係止部材の近辺を拡大して示す断面図、図４は筒部材１１ａ〜１１ｆの摺動部材の近辺を拡大して示す断面図、図５は係止部材３１ｂ〜３１ｆおよび摺動部材４１ｂ〜４１ｆの位置関係を示す図である。
【００１３】
図１において、支持装置１は、最も外側から内側まで順に入れ子式に挿入された６つの筒部材１１ａ〜１１ｆ、それぞれの筒部材１１ａ〜１１ｆの下端部に設けられたカバー部材１２ａ〜１２ｆ、最も外側の筒部材１１ａを除く筒部材１１ｂ〜１１ｆの各外面の上端部の近辺に設けられた係止部材３１ｂ〜３１ｆおよび摺動部材４１ｂ〜４１ｆなどからなる。
【００１４】
つまり、支持装置１は、６つの筒部材１１ａ〜１１ｆからなる６段のテレスコープ式のものである。いずれかの段または全ての段について言うときには、ａ，ｂ，ｃなどの符号を省略することがある。
【００１５】
各筒部材１１ａ〜１１ｅとそれぞれの直ぐ内側に挿入された筒部材１１ｂ〜１１ｆとの間の構造的および作用的な関係は、ごく一部を除いて互いに同一であるので、下端側の２つの筒部材１１ｅ、１１ｆおよびカバー部材１２ｅ、１２ｆについて代表的に説明し、これとの相違点について補足的に説明する。
【００１６】
筒部材１１ａ〜１１ｆは、アルミニウム合金などからなり、断面が正四角形に形成されている。
図２において、カバー部材１２ｅは、アルミニウム合金またはステンレス鋼などからなり、筒部材１１ｅの下端部の外周面に嵌まり込んだリング状の外嵌部１２１と、外嵌部１２１に連続して一体的に形成され、筒部材１１ｅの内周面よりも内側に突出する係止部１２２とを有する。
【００１７】
このカバー部材１２ｅは、外嵌部１２１に設けられたねじ穴１２３にねじ込まれ、筒部材１１ｅに設けられた穴１１１に嵌入するねじピン２１ｅによって、筒部材１１ｅと軸方向に係合して抜け止めがなされている。
【００１８】
また、筒部材１１ｅの下端面と係止部１２２との間には、筒部材１１ｆに取り付けられた係止部材３１ｆが当接したときの衝撃を弱めるために、合成樹脂または合成ゴムなどからなるクッション部材１２４が設けられている。
【００１９】
外嵌部１２１の上端部には周溝１２５が設けられている。周溝１２５には、当該筒部材１１ｅが収縮して（上方に移動して）その外嵌部１２１の上端面が直ぐ外側の筒部材１１ｄのカバー部材１２ｄに当接したときの衝撃を弱めるとともに、塵埃が入るのを防止するための、合成樹脂または合成ゴムからなるパッキン１２６が設けられている。
【００２０】
なお、ねじピン２１ｅは、ステンレス鋼などからなり、頭部２１１、ネジ部２１２、および円柱状のピン部２１３を有する。頭部２１１の中央には、レンチを挿入して回転させるための六角穴２１４が設けられている。
【００２１】
係止部１２２には、ねじ穴１２７が設けられている。ねじ穴１２７には、摺動性の良好な合成樹脂からなる摺動ねじ２２ｅがねじ込まれている。摺動ねじ２２ｅは、係止部１２２の内周面よりも内側に突出し、その内側に挿入された筒部材１１ｆの外周面と摺接する。摺動ねじ２２ｅには、その端面に、レンチを挿入して回転させるための六角穴２２１が設けられている。また、摺動ねじ２２ｅのねじ込み位置を調整した後に、その位置で固定するためのロックナット２２２が設けられている。
【００２２】
なお、摺動ねじ２２ｅの全体を合成樹脂から形成してもよいが、例えば、摺動ねじ２２ｅの本体部を銅合金などから形成し、その先端の摺動部分に合成樹脂からなるシューを嵌め込んで構成してもよい。
【００２３】
最も内側の筒部材１１ｆについては、その下端部に設けられたカバー部材１２ｆは、筒部材１１ｆの外周面に嵌まり込んだリング状のものである。カバー部材１２ｆは、筒部材１１ｆに設けられた穴を貫通し、カバー部材１２ｆに設けられたねじ穴にねじ込まれたボルト２１ｆによって固定されている。
【００２４】
１つのカバー部材１２ｅについて、ねじピン２１ｅおよび摺動ねじ２２ｅは、各面においてその両側に２つずつ、合計８つ設けられている。カバー部材１２ｆについて、ねじピン２１ｆも同様に、各面においてその両側に２つずつ、合計８つ設けられている。
【００２５】
図３において、筒部材１１ｆには、その外側のカバー部材１２ｅの係止部１２２（クッション部材１２４）に軸方向に当接して抜け止めを図るための係止部材３１ｆが取り付けられている。係止部材３１ｆは、ステンレス鋼などからなる直方体の板状の本体３１１に、ねじ穴３１３を有した２つのボス３１２が設けられている。ボス３１２が、筒部材１１ｆに設けられた穴１１２に嵌まり込み、内側からねじ込まれたねじ３１４によって固定されている。
【００２６】
図１によく示されるように、係止部材３１ｂ〜３１ｆは、長さは同じであるが、幅は互いに異なる。すなわち、係止部材３１ｂ〜３１ｄは互いに同じ幅であるが、係止部材３１ｅはそれらよりも幅が狭く、係止部材３１ｆはそれよりもさらに狭い。
【００２７】
図５によく示されるように、係止部材３１ｂ〜３１ｆは、各筒部材１１ｂ〜１１ｆに対して、それぞれの４つの外面の中央部にそれぞれ１つずつ、合計４つずつ設けられている。
【００２８】
図４において、筒部材１１ｆには、摺動部材４１ｆが取り付けられている。摺動部材４１ｆは、摺動性のよい合成樹脂などからなり、径大の円板状部４１１に径小のボス部４１２が一体に設けられている。ボス部４１２が、筒部材１１ｆに設けられた穴１１３に嵌まり込み、その外側の筒部材１１ｅの内周面との間で挟まれることによって取り付けられている。
【００２９】
図１および図５によく示されるように、摺動部材４１ｂ〜４１ｆは、同じ大きさであるが、その取り付け位置が若干異なる。すなわち、摺動部材４１ｂは筒部材１１ｂの各面の幅方向の中央に１つずつ設けられ、他の各摺動部材４１ｃ〜４１ｆは、各筒部材１１ｃ〜１１ｆの各面の幅方向の端部側に片寄った位置に１つずつ設けられている。
【００３０】
摺動部材４１ｃ〜４１ｆが各筒部材１１ｃ〜１１ｆの各面において一方の端部側に片寄って設けられている理由は、外側の筒部材１１ｂ〜１１ｅに設けられた係止部材３１ｂ〜３１ｅのねじ３１４の頭部と干渉しないようにするためである。したがって、ねじ３１４の頭部が筒部材１１ｂ〜１１ｅの内周面よりも凹んでいるなどの理由で干渉しないことが明らかな場合は、各摺動部材４１ｃ〜４１ｆを筒部材１１ｃ〜１１ｆの各面の幅方向の中央に設けてもよい。
【００３１】
最も外側の筒部材１１ａには、係止部材も摺動部材も設けられていない。その代わり、天井のビームなどに取り付けるための８つの穴１１４が設けられている。
【００３２】
次に、上のように構成された支持装置１の動作および作用について説明する。
支持装置１は、最も内側の筒部材１１ｆおよびカバー部材１２ｆが下になるような鉛直状態で、最も外側の筒部材１１ａに設けられた穴１１４を利用して、天井のビームなどにボルトで固定される。
【００３３】
天井のビームなどに設けられたウインチのワイヤを、筒部材１１ａの直上に設けられた滑車を介して筒部材１１ａ〜１１ｆの中を通し、ワイヤの先端を、最も内側の筒部材１１ｆのカバー部材１２ｆまたはそれに取り付けられた図示しない金具に固定する。
【００３４】
最も内側のカバー部材１２ｆまたはそれに取り付けられた金具には、照明器具などを取り付ける。照明器具以外に、カメラ、マイクロフォン、スピーカ、モニタ、各種計測装置、乗物籠などを取り付けることが可能である。
【００３５】
ウインチによってワイヤを巻き戻すと、筒部材１１ｂ〜１１ｆはその自重によって下降する。これによって、照明器具が下降する。但し、各筒部材１１ｂ〜１１ｆは、係止部材３１ｂ〜３１ｆがカバー部材１２ａ〜１２ｅの係止部１２２（クッション部材１２４）に当接すると停止する。
【００３６】
これとは逆に、ウインチによってワイヤを巻き上げると、それに応じて筒部材１１ｂ〜１１ｆが上昇する。これによって、照明器具が上昇する。ワイヤを適当な位置で静止することによって、照明器具の高さ位置が決定される。このとき、支持装置１は剛性を有し、筒部材１１ａの根元が固定されているので、ほとんど揺れない。
【００３７】
筒部材１１ａ〜１１ｆが下降する際には、外側から順に下降する。筒部材１１ａ〜１１ｆが上昇する際には、内側から順に上昇する。その際に、筒部材１１ｂ〜１１ｆの表面は、それぞれの外側のカバー部材１２ａ〜１２ｅの摺動ねじ２２と摺接し、摺動部材４１ｂ〜４１ｆは、それぞれの外側の筒部材１１ａ〜１１ｅの内周面と摺接する。したがって、摺動時の音が小さく静かである。
【００３８】
摺動部材４１ｂ〜４１ｆが、筒部材１１ｂ〜１１ｆの各面に１ヵ所のみ設けられているので、筒部材１１ａ〜１１ｆが歪んだ場合であってもこじれることなく、摺動が円滑である。摺動部材４１ｂ〜４１ｆは、ボス部４１２が穴１１３に嵌まり込むことによって取り付けられているので、着脱が容易である。したがって、摩耗の際の交換が容易である。
【００３９】
摺動ねじ２２ｅを回転させて調整することによって、筒部材１１ｂ〜１１ｆの表面との摺接状態を容易に調整することができる。
筒部材１１ｂ〜１１ｆの下降の際に、それぞれの最大ストローク位置において係止部材３１ｂ〜３１ｆがカバー部材１２ａ〜１２ｅの係止部１２２に当接して停止するので、安全である。また、クッション部材１２４が設けられているので、衝撃が少なく、一層安全である。
【００４０】
カバー部材１２ａ〜１２ｅは、筒部材１１ａ〜１１ｅの外周面に嵌まり込み、ねじピン２１ｅによって軸方向に係合しているので、取り付けが確実で安全である。しかも、ねじピン２１ｅを取り外すことによって、カバー部材１２ａ〜１２ｅを筒部材１１ａ〜１１ｅから容易に取り外すことができる。また取り付けも簡単である。
【００４１】
したがって、支持装置１の全体を取り外すことなく、支持装置１を吊り下げたままの状態で、必要な箇所のカバー部材１２ａ〜１２ｅを取り外して必要な筒部材１１ｂ〜１１ｆを抜き出して分解することができる。これによって、摺動部材４１ｂ〜４１ｆの交換、摺動部分へのグリースの注入、内部の点検および清掃などを容易に行うことができ、メンテナンスが容易である。
【００４２】
また、支持装置１の各部の構造が単純であり、全体をコンパクトに構成することができる。
上の実施形態では、６段の支持装置１について説明したが、５段以下または７段以上の支持装置としてもよい。筒部材１１ａ〜１１ｆを四角形としたが、三角形、五角形、六角形、八角形など、種々の断面形状とすることができる。
【００４３】
筒部材１１ａ〜１１ｆを軽量化するためにアルミニウム合金を用いたが、段数、寸法、用途などに応じて、鋼鉄、ステンレス合金、他の金属、または合成樹脂などを用いることが可能である。
【００４４】
支持装置１は、スタジオで利用する他、ホール、体育館、その他の種々の施設、井戸の中、ダムの中、穴の中など、種々の環境で利用することができる。支持装置１を鉛直姿勢で用いる他、斜め姿勢で用いることも可能である。
【００４５】
その他、支持装置１の全体または各部の構造、形状、寸法、材質、個数などは、本発明の趣旨に沿って適宜変更することができる。
【００４６】
【発明の効果】
本発明によると、吊り下げたままの状態で筒部材をその外側の筒部材から抜き出すことが可能であり、メンテナンスが容易である。
【００４７】
請求項２の発明によると、筒部材の表面との摺接状態を容易に調整することができる。
【図面の簡単な説明】
【図１】本発明に係る支持装置の収縮時における正面図である。
【図２】支持装置の下端部を拡大して示す断面図である。
【図３】筒部材の係止部材の近辺を拡大して示す断面図である。
【図４】筒部材の摺動部材の近辺を拡大して示す断面図である。
【図５】係止部材および摺動部材の位置関係を示す図である。
【符号の説明】
１支持装置
１１ａ〜１１ｆ筒部材
１２ａ〜１２ｆカバー部材
２１ねじピン
２２摺動ねじ（摺動ねじ部材）
３１ｂ〜３１ｆ係止部材
４１ｃ〜４１ｆ摺動部材
１１１穴
１２１外嵌部
１２２係止部
１２３ねじ穴
１２４クッション部材（係止部）
１２７ねじ穴[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a support device configured such that a plurality of cylindrical members slide in a telescopic manner and can be extended and contracted. For example, the present invention is used to suspend a lighting fixture or the like from a ceiling in a studio.
[0002]
[Prior art]
Conventionally, wires have been used to suspend lighting fixtures and the like from the ceiling in studios.
[0003]
That is, a large number of winches and pulleys are installed on a beam provided near the ceiling, and a lighting fixture attached to the tip of the wire is rolled up or down by the winch through the pulleys.
[0004]
[Problems to be solved by the invention]
However, when suspended only with wires, the suspended luminaire may sway from side to side, and when swayed, it is difficult to stop.
[0005]
Therefore, it is conceivable to use a telescopic support device in which a plurality of cylindrical members are slid in a nested manner. In the telescopic support device, since a plurality of cylindrical members slide, there is a possibility that noise may be generated or the sliding may not be smoothly performed when the sliding member is worn.
[0006]
Therefore, it is desired that maintenance such as periodic inspection of the sliding portion and replacement at the time of wear is easy. In particular, it is desirable that the tubular member can be extracted from the outer tubular member in a suspended state.
[0007]
The present invention has been made in view of the above-described problems, and provides an easily extendable support device that can be easily pulled out from the outer cylindrical member while being suspended. With the goal.
[0008]
An apparatus according to the present invention is a support device configured such that a plurality of cylindrical members slide in a telescopic manner, and excludes at least the innermost cylindrical member among the plurality of cylindrical members. A cover member is provided at each end of the tubular member, and the cover member includes a ring-shaped outer fitting portion fitted into an outer peripheral surface of the end of the tubular member provided with the cover member , It is integrally formed continuously on the outer fitting portion, and a locking portion protruding inward from the inner peripheral surface of the tubular member is screwed into a threaded hole provided in the outer fitting portion, the tube by screws pin that fits into a hole provided in the member engages the tubular member and axially is retaining from the tubular member of the cover member made, and the cover member by removing the screw pin So that it can be removed from the cylinder And Tsu, on the outer peripheral surface of the inserted tubular member just inside of the tubular member to which the cover member is provided, engaging in order to contact with retaining the locking portion of the cover member in the axial direction A locking member is provided, and the locking portion is screwed into a screw hole provided in the locking portion, protrudes inward from the locking portion, and the cylindrical member provided with the cover member is provided. A sliding screw member is provided that is in sliding contact with the outer peripheral surface of the cylindrical member inserted immediately inside, and whose sliding contact state can be adjusted by adjusting the screwing position.
[0010]
More preferably, each of the plurality of cylindrical members has a quadrangular cross section, two screw pins are provided on each side of each surface, and one locking member is provided at the center of each surface. It is provided one by one.
[0011]
More preferably, the back side of the outer peripheral surface of the inserted tubular member just inside of the tubular member to which the cover member is provided, the sliding of the cover member is in contact with the inner peripheral surface in sliding of the tubular member provided The member is provided at a position that is offset toward one end side on each surface and does not interfere with the locking member provided on the cylindrical member provided with the cover member .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a front view of the support device 1 according to the present invention when contracted, FIG. 2 is an enlarged cross-sectional view of the lower end portion of the support device 1, and FIG. 3 is an enlarged view of the vicinity of the locking members of the cylindrical members 11a to 11f. FIG. 4 is an enlarged sectional view showing the vicinity of the sliding members of the cylindrical members 11a to 11f, and FIG. 5 is a diagram showing the positional relationship between the locking members 31b to 31f and the sliding members 41b to 41f. It is.
[0013]
In FIG. 1, the support device 1 includes six cylindrical members 11 a to 11 f that are nested in order from the outermost side to the inner side, cover members 12 a to 12 f that are provided at the lower ends of the respective cylindrical members 11 a to 11 f, It consists of locking members 31b to 31f and sliding members 41b to 41f provided near the upper ends of the outer surfaces of the cylindrical members 11b to 11f excluding the outer cylindrical member 11a.
[0014]
That is, the support device 1 is a six-stage telescope type composed of six cylindrical members 11a to 11f. When referring to any or all of the stages, symbols such as a, b, and c may be omitted.
[0015]
The structural and functional relationships between the cylindrical members 11a to 11e and the cylindrical members 11b to 11f inserted immediately inside are the same except for a small part. The cylindrical members 11e and 11f and the cover members 12e and 12f will be described representatively, and differences from this will be described supplementarily.
[0016]
The cylinder members 11a to 11f are made of an aluminum alloy or the like, and have a square cross section.
In FIG. 2, the cover member 12e is made of aluminum alloy, stainless steel, or the like, and is continuously integrated with the ring-like outer fitting portion 121 fitted into the outer peripheral surface of the lower end portion of the cylindrical member 11e. And a locking portion 122 that protrudes inward from the inner peripheral surface of the cylindrical member 11e.
[0017]
The cover member 12e is screwed into the screw hole 123 provided in the outer fitting portion 121, and is engaged with the cylinder member 11e in the axial direction by the screw pin 21e fitted into the hole 111 provided in the cylinder member 11e, and is removed. Stopped.
[0018]
In addition, between the lower end surface of the cylindrical member 11e and the locking portion 122, it is made of synthetic resin or synthetic rubber in order to weaken the impact when the locking member 31f attached to the cylindrical member 11f contacts. A cushion member 124 is provided.
[0019]
A circumferential groove 125 is provided at the upper end portion of the outer fitting portion 121. The circumferential groove 125 weakens the impact when the cylindrical member 11e contracts (moves upward) and the upper end surface of the outer fitting portion 121 immediately contacts the cover member 12d of the outer cylindrical member 11d. A packing 126 made of synthetic resin or synthetic rubber is provided to prevent dust from entering.
[0020]
The screw pin 21e is made of stainless steel or the like, and has a head portion 211, a screw portion 212, and a cylindrical pin portion 213. In the center of the head 211, a hexagonal hole 214 for inserting and rotating a wrench is provided.
[0021]
The locking part 122 is provided with a screw hole 127. A sliding screw 22e made of a synthetic resin having good slidability is screwed into the screw hole 127. The sliding screw 22e protrudes inward from the inner peripheral surface of the locking portion 122 and is in sliding contact with the outer peripheral surface of the cylindrical member 11f inserted inside the sliding screw 22e. The sliding screw 22e is provided with a hexagonal hole 221 at its end face for inserting and rotating a wrench. Further, after adjusting the screwing position of the sliding screw 22e, a lock nut 222 is provided for fixing at the position.
[0022]
The entire sliding screw 22e may be formed of a synthetic resin. For example, the body of the sliding screw 22e is formed of a copper alloy or the like, and a shoe made of synthetic resin is fitted to the sliding portion at the tip. May be configured.
[0023]
For the innermost cylindrical member 11f, the cover member 12f provided at the lower end of the cylindrical member 11f has a ring shape fitted into the outer peripheral surface of the cylindrical member 11f. The cover member 12f passes through a hole provided in the cylindrical member 11f, and is fixed by a bolt 21f screwed into a screw hole provided in the cover member 12f.
[0024]
For one cover member 12e, a total of eight screw pins 21e and sliding screws 22e are provided on each side, two on each side. Similarly, the cover member 12f is also provided with a total of eight screw pins 21f, two on each side, two on each side.
[0025]
In FIG. 3, a locking member 31 f is attached to the cylinder member 11 f to prevent it from coming off by contacting the locking portion 122 (cushion member 124) of the outer cover member 12 e in the axial direction. The locking member 31f is provided with two bosses 312 having screw holes 313 in a rectangular plate-shaped main body 311 made of stainless steel or the like. The boss 312 is fitted in the hole 112 provided in the cylindrical member 11f, and is fixed by a screw 314 screwed from the inside.
[0026]
As well shown in FIG. 1, the locking members 31 b to 31 f have the same length but different widths. That is, the locking members 31b to 31d have the same width, but the locking member 31e is narrower than them, and the locking member 31f is narrower than that.
[0027]
As well shown in FIG. 5, the locking members 31 b to 31 f are provided in a total of four, one for each cylindrical member 11 b to 11 f, one at the center of each of the four outer surfaces.
[0028]
In FIG. 4, a sliding member 41f is attached to the cylinder member 11f. The sliding member 41f is made of synthetic resin or the like having good sliding properties, and a small-diameter boss portion 412 is integrally provided on a large-diameter disk-shaped portion 411. The boss portion 412 is fitted by being fitted into a hole 113 provided in the cylindrical member 11f and sandwiched between the outer peripheral surface of the cylindrical member 11e.
[0029]
As well shown in FIGS. 1 and 5, the sliding members 41b to 41f have the same size, but their mounting positions are slightly different. That is, one sliding member 41b is provided at the center in the width direction of each surface of the cylindrical member 11b, and the other sliding members 41c to 41f are end portions in the width direction of the respective surfaces of the cylindrical members 11c to 11f. One is provided at a position offset to the part side.
[0030]
The reason why the sliding members 41c to 41f are provided so as to be offset toward one end side on each surface of the cylindrical members 11c to 11f is that the locking members 31b to 31e provided on the outer cylindrical members 11b to 11e are provided. This is to prevent interference with the head of the screw 314. Therefore, when it is clear that the head of the screw 314 is not interfered because the head is recessed from the inner peripheral surfaces of the cylindrical members 11b to 11e, the sliding members 41c to 41f are connected to the cylindrical members 11c to 11f. You may provide in the center of the width direction of a surface.
[0031]
The outermost cylindrical member 11a is provided with neither a locking member nor a sliding member. Instead, eight holes 114 are provided for attachment to a ceiling beam or the like.
[0032]
Next, the operation and action of the support device 1 configured as described above will be described.
The support device 1 is fixed to a ceiling beam or the like with a bolt using a hole 114 provided in the outermost cylindrical member 11a in a vertical state in which the innermost cylindrical member 11f and the cover member 12f are downward. Is done.
[0033]
A winch wire provided on a ceiling beam or the like is passed through the cylindrical members 11a to 11f via a pulley provided directly above the cylindrical member 11a, and the tip of the wire is connected to the cover member of the innermost cylindrical member 11f. It is fixed to 12f or a metal fitting (not shown) attached thereto.
[0034]
A lighting fixture or the like is attached to the innermost cover member 12f or the metal fitting attached thereto. In addition to the lighting fixture, a camera, a microphone, a speaker, a monitor, various measuring devices, a vehicle basket, and the like can be attached.
[0035]
When the wire is rewound by the winch, the cylindrical members 11b to 11f are lowered by their own weight. This lowers the luminaire. However, the cylindrical members 11b to 11f stop when the locking members 31b to 31f come into contact with the locking portions 122 (cushion members 124) of the cover members 12a to 12e.
[0036]
On the contrary, when the wire is wound up by the winch, the cylindrical members 11b to 11f are raised accordingly. This raises the luminaire. By resting the wire in place, the height position of the luminaire is determined. At this time, the support device 1 has rigidity and the base of the cylindrical member 11a is fixed, so that it hardly swings.
[0037]
When the cylindrical members 11a to 11f are lowered, they are sequentially lowered from the outside. When the cylindrical members 11a to 11f rise, they rise in order from the inside. At that time, the surfaces of the cylindrical members 11b to 11f are in sliding contact with the sliding screws 22 of the respective outer cover members 12a to 12e, and the sliding members 41b to 41f are the inner surfaces of the respective outer cylindrical members 11a to 11e. Make sliding contact with the peripheral surface. Therefore, the sound during sliding is small and quiet.
[0038]
Since the sliding members 41b to 41f are provided at only one place on each surface of the cylindrical members 11b to 11f, even if the cylindrical members 11a to 11f are distorted, the sliding is smooth. Since the sliding members 41b to 41f are attached by fitting the boss portion 412 into the hole 113, the sliding members 41b to 41f are easily attached and detached. Therefore, replacement at the time of wear is easy.
[0039]
By rotating and adjusting the sliding screw 22e, the sliding contact state with the surfaces of the cylindrical members 11b to 11f can be easily adjusted.
When the cylindrical members 11b to 11f are lowered, the locking members 31b to 31f come into contact with the locking portions 122 of the cover members 12a to 12e and stop at the maximum stroke positions. Moreover, since the cushion member 124 is provided, there is little impact and it is safer.
[0040]
Since the cover members 12a to 12e are fitted on the outer peripheral surfaces of the cylindrical members 11a to 11e and are engaged in the axial direction by the screw pins 21e, the attachment is reliable and safe. Moreover, by removing the screw pin 21e, the cover members 12a to 12e can be easily detached from the cylindrical members 11a to 11e. It is also easy to install.
[0041]
Therefore, it is possible to remove the necessary cylindrical members 11b to 11f and disassemble them by removing the cover members 12a to 12e at necessary places while the support device 1 is suspended without removing the entire support device 1. it can. As a result, replacement of the sliding members 41b to 41f, injection of grease to the sliding portion, internal inspection and cleaning, etc. can be easily performed, and maintenance is easy.
[0042]
Moreover, the structure of each part of the support apparatus 1 is simple, and the whole can be comprised compactly.
In the above embodiment, the six-stage support device 1 has been described. However, the support device may have five stages or less or seven stages or more. Although the cylindrical members 11a to 11f are quadrangular, they can have various cross-sectional shapes such as a triangle, pentagon, hexagon, and octagon.
[0043]
In order to reduce the weight of the cylindrical members 11a to 11f, an aluminum alloy is used. However, steel, a stainless alloy, another metal, a synthetic resin, or the like can be used depending on the number of steps, dimensions, applications, and the like.
[0044]
The support device 1 can be used in various environments such as a studio, a hall, a gymnasium, various other facilities, a well, a dam, and a hole. In addition to using the support device 1 in a vertical posture, the support device 1 can also be used in an oblique posture.
[0045]
In addition, the structure, shape, dimensions, material, number, etc. of the entire support device 1 or each part can be appropriately changed in accordance with the spirit of the present invention.
[0046]
【The invention's effect】
According to the present invention, the cylinder member can be extracted from the outer cylinder member while being suspended, and maintenance is easy.
[0047]
According to the invention of claim 2, the sliding contact state with the surface of the cylindrical member can be easily adjusted.
[Brief description of the drawings]
FIG. 1 is a front view of a support device according to the present invention when contracted.
FIG. 2 is an enlarged cross-sectional view of a lower end portion of a support device.
FIG. 3 is an enlarged cross-sectional view showing the vicinity of a locking member of a cylindrical member.
FIG. 4 is an enlarged cross-sectional view showing the vicinity of a sliding member of a cylindrical member.
FIG. 5 is a diagram showing a positional relationship between a locking member and a sliding member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Support apparatus 11a-11f Tube member 12a-12f Cover member 21 Screw pin 22 Sliding screw (sliding screw member)
31b-31f Locking member 41c-41f Sliding member 111 Hole 121 Outer fitting part 122 Locking part 123 Screw hole 124 Cushion member (locking part)
127 Screw hole

Claims

It is a support device configured such that a plurality of cylindrical members slide in a telescopic manner and can be expanded and contracted,
A cover member is provided at each end of the cylindrical member excluding the cylindrical member inserted at least on the innermost side of the plurality of cylindrical members ,
The cover member is
A ring-shaped outer fitting portion fitted into the outer peripheral surface of the end portion of the cylindrical member provided with the cover member ;
Is integrally formed continuously on the outer fitting portion, and a locking portion protruding inward from the inner peripheral surface of the tubular member,
Screwed into a threaded hole provided in the outer fitting portion, the screw pin that fits into a hole provided in the tubular member, exits from the tubular member of the cover member engaged with the tubular member and the axial direction The stopper is made , and the cover member can be removed from the cylindrical member by removing the screw pin ,
On the outer peripheral surface of the cylindrical member inserted immediately inside the cylindrical member provided with the cover member, there is provided a locking member for coming into contact with the locking portion of the cover member in the axial direction to prevent the cylindrical member from coming off. It is and,
The locking member is screwed into a screw hole provided in the locking portion, protrudes inward from the locking portion, and is inserted immediately inside the cylindrical member provided with the cover member. And a sliding screw member capable of adjusting the sliding contact state by adjusting the screwing position is provided.
A telescopic support device characterized by that.

Each of the plurality of cylindrical members has a square cross section,
Two screw pins are provided on each side of the screw pin,
The locking members are provided one at the center of each surface,
Extendable support apparatus of claim 1 Symbol placement.

On the back side of the outer peripheral surface of the cylindrical member inserted immediately inside the cylindrical member provided with the cover member, there are sliding members that are in sliding contact with the inner peripheral surface of the cylindrical member provided with the cover member. It is provided at a position that is offset toward one end side on the surface and does not interfere with the locking member provided on the cylindrical member provided with the cover member .
The extendable support device according to claim 2 .