JPH11182166A - Expansion pipe structure of ascending/descending frame and opening frame - Google Patents
Expansion pipe structure of ascending/descending frame and opening frameInfo
- Publication number
- JPH11182166A JPH11182166A JP36463097A JP36463097A JPH11182166A JP H11182166 A JPH11182166 A JP H11182166A JP 36463097 A JP36463097 A JP 36463097A JP 36463097 A JP36463097 A JP 36463097A JP H11182166 A JPH11182166 A JP H11182166A
- Authority
- JP
- Japan
- Prior art keywords
- contact surface
- corners
- tube
- telescopic
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Ladders (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、梯子、梯子兼用脚
立、脚立、足場作業台、作業タワー等に用いられる昇降
枠及び開口枠の伸縮管構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic pipe structure of a lifting frame and an opening frame used for a ladder, a stepladder serving as a ladder, a stepladder, a scaffold work table, a work tower, and the like.
【０００２】[0002]
【従来の技術】従来、例えば、図１２に示す足場作業台
８０は、上面に作業床面８１を有する横長矩形板からな
る足場板８２と、それぞれ上端部が足場板８２の左右端
部に折り畳み連結機構８３、８４を介して折り畳み自在
に連結されると共に、下端が床面８５に載置される一対
の支持脚８６、８７を具備する。2. Description of the Related Art Conventionally, for example, a scaffolding worktable 80 shown in FIG. It includes a pair of support legs 86 and 87 that are foldably connected via connection mechanisms 83 and 84 and whose lower ends are placed on the floor 85.
【０００３】ここに、支持脚８６、８７は伸縮管構造を
具備する昇降枠として構成されている。即ち、支持脚８
６（支持脚８７も同じ。）は、図１２に示すように、所
定の間隔を開けて上下方向に伸延する一対の支柱８８、
８９と、両支柱８８、８９間に上下方向に間隔を開けて
横架される複数の踏み桟９０から形成されている。ま
た、各支柱８８（支柱８９も同じ。）は、図１３に示す
ように、中空矩形断面を有する主脚（外管を形成す
る。）９１中に同様に中空矩形断面を有する伸縮脚（内
管を構成する。）９２を摺動自在に嵌入した伸縮管構造
を有している。さらに、伸縮脚９２の外側面にはラック
溝９３ａが設けられ、このラック溝９３ａには、固定装
置９３内に設けられスプリングによって係合方向に付勢
されたラック歯を着脱自在に係合させることができる。Here, the support legs 86 and 87 are configured as a lifting frame having a telescopic tube structure. That is, the support legs 8
As shown in FIG. 12, a pair of columns 88 extending in the vertical direction at predetermined intervals, as shown in FIG.
89, and a plurality of treads 90 that are laterally suspended between the columns 88, 89 with an interval in the vertical direction. Also, as shown in FIG. 13, each of the columns 88 (the columns 89 are the same) has a telescopic leg (an inner tube) similarly having a hollow rectangular cross section in a main leg (forming an outer tube) 91 having a hollow rectangular cross section. (It constitutes a tube.) 92 has a telescopic tube structure in which a sliding member 92 is slidably fitted. Further, a rack groove 93a is provided on the outer surface of the telescopic leg 92, and the rack teeth provided in the fixing device 93 and urged in the engaging direction by a spring are detachably engaged with the rack groove 93a. be able to.
【０００４】従って、伸縮脚９２を主脚９１に対して任
意の長さだけ伸長した後、固定装置９３によってラック
溝９３ａにラック歯を係合させることによって床面８５
から足場板８２までの高さを調整することができる。ま
た、上記した構成を有する支持脚８６、８７に代えて、
図１４に示す昇降枠９４を足場板８２と同様な足場板の
両端に連結した作業用足場台がある。Therefore, after extending the extendable leg 92 by an arbitrary length with respect to the main leg 91, the rack teeth are engaged with the rack groove 93a by the fixing device 93, so that the floor surface 85 is formed.
Can be adjusted from the height to the scaffold plate 82. Further, instead of the support legs 86 and 87 having the above-described configuration,
There is a working scaffold that connects a lifting frame 94 shown in FIG. 14 to both ends of a scaffold similar to the scaffold 82.
【０００５】ここに、昇降枠９４は、幅方向に所定の間
隔を開けて垂直方向に伸延する一対の支柱９５、９６
と、支柱９５、９６間に上下方向に間隔を開けて横架さ
れる複数の踏み桟９７と、支柱９５、９６の下端同士を
連結する下部連結管１０５と、上端が支柱９５、９６の
外側面に揺動自在に枢支されると共に下端が支柱９５、
９６の下端面より下方に伸延して床面等に接地可能な補
助支柱９８、９９と、補助支柱９８、９９と下部連結管
１０５との間に介設され、補助支柱９８、９９の幅方向
の張り出し量を規制する張り出し量調整管１００、１０
１とを具備する。上記した構成において、補助支柱９
８、９９のみならず、下部連結管１０５と張り出し量調
整管１００、１０１も、図１３に示した伸縮管構造と同
様な伸縮管構造を有している。[0005] Here, the lifting frame 94 is provided with a pair of columns 95, 96 extending in the vertical direction at predetermined intervals in the width direction.
And a plurality of step bars 97 which are horizontally suspended at intervals in the vertical direction between the supports 95 and 96, a lower connecting pipe 105 which connects lower ends of the supports 95 and 96, and an upper end is outside the supports 95 and 96. It is pivotally supported on the side and the lower end is a support 95,
Auxiliary posts 98, 99 extending downward from the lower end surface of 96 and capable of contacting the floor or the like, and are interposed between the auxiliary posts 98, 99 and the lower connecting pipe 105, and the width direction of the auxiliary posts 98, 99 Overhang adjusting pipes 100, 10 for regulating the overhang amount
1 is provided. In the above configuration, the auxiliary support 9
Not only 8, 99, but also the lower connecting pipe 105 and the overhang amount adjusting pipes 100, 101 have the same telescopic pipe structure as the telescopic pipe structure shown in FIG.
【０００６】[0006]
【発明が解決しようとする課題】しかし、上記した昇降
枠の伸縮管構造は、未だ、以下の解決すべき課題を有し
ていた。即ち、図１３に示す昇降枠の伸縮管構造におい
ては、伸縮脚９２の主脚９１内での円滑な摺動を確保す
るため、共に中空矩形断面を有する伸縮脚９２の外周面
と主脚９１の内周面との間に一定の隙間が形成されてい
る。しかし、図示するように、伸縮脚９２の外周面と主
脚９１の内周面とは、共に、中心を共通する矩形形状を
有するので、全周にわたって、即ち、前、後方向のみな
らず、横方向にも隙間が生じることになる。However, the above-described telescopic structure of the elevating frame still has the following problems to be solved. That is, in the telescopic tube structure of the elevating frame shown in FIG. 13, in order to ensure smooth sliding of the telescopic legs 92 in the main legs 91, the outer peripheral surface of the telescopic legs 92, both of which have a hollow rectangular cross section, and the main legs 91. A constant gap is formed between the inner peripheral surface and the inner peripheral surface. However, as shown in the figure, since the outer peripheral surface of the telescopic leg 92 and the inner peripheral surface of the main leg 91 both have a rectangular shape having a common center, not only the entire circumference, that is, not only the front and rear directions, A gap also occurs in the lateral direction.
【０００７】従って、作業者が支持脚８６上を昇降する
際、主脚９１の外壁内面が地面に接地され固定されてい
る伸縮脚９２の外壁外面に押圧され、前後方向は固定さ
れることになるが、横方向にも隙間があるので、主脚９
１は伸縮脚９２に対して横方向に移動する。この移動
は、作業者に不安感を与えることになり、場合によって
は転落事故を引き起こすことも考えられる。このこと
は、図１４に示す昇降枠９４の伸縮管構造における補助
支柱９８、９９、及び、下部連結管１０５と張り出し量
調整管１００、１０１についても同様である。特に、図
１４に示す場合においては、下部連結管１０５に伸縮自
在に嵌入されている張り出し量調整管１００、１０１は
ロックピン１０２、１０３によって位置決めされている
だけであるため、横ゆれ個所が４か所もあり、補助支柱
９８、９９における横ゆれと合わせて、作業用足場台の
横ゆれが大きく、作業者の不安感を増すことになる。本
発明は、このような事情に鑑みなされたものであり、伸
縮管構造を構成する内、外管間の横ゆれを確実に防止し
て、作業者の安定かつ安全な昇降を可能とする昇降枠及
び開口枠の伸縮管構造を提供することを目的とする。Accordingly, when the worker moves up and down on the support leg 86, the inner surface of the outer wall of the main leg 91 is pressed against the outer surface of the outer wall of the telescopic leg 92 which is fixed to the ground and is fixed in the front-rear direction. However, since there is a gap in the lateral direction,
1 moves laterally with respect to the telescopic leg 92. This movement gives the worker a feeling of anxiety, and in some cases, may cause a fall accident. This is the same for the auxiliary columns 98 and 99, the lower connecting tube 105, and the overhang amount adjusting tubes 100 and 101 in the telescopic tube structure of the lifting frame 94 shown in FIG. In particular, in the case shown in FIG. 14, since the overhang amount adjusting tubes 100 and 101 which are fitted into the lower connecting tube 105 so as to be extendable and contractible are merely positioned by the lock pins 102 and 103, the lateral shaking portion is 4 There are also some places, and in addition to the lateral sway of the auxiliary columns 98 and 99, the lateral sway of the work scaffolding table is large, which increases the worker's anxiety. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and includes a telescopic tube structure, in which a horizontal swing between outer tubes is reliably prevented, and a lift that enables a stable and safe ascent and descent of an operator is provided. An object is to provide a telescopic tube structure of a frame and an opening frame.
【０００８】[0008]
【課題を解決するための手段】前記目的に沿う請求項１
記載の昇降枠の伸縮管構造は、横幅方向に間隔をあけて
立設した一対の垂直部材を、上下方向に間隔をあけて配
設した複数の横架部材によって連結して昇降枠が構成さ
れ、前記各垂直部材が内管と外管からなる伸縮管構造と
なっている昇降枠の伸縮管構造において、前記内管と外
管が共に中空矩形断面を有し、前記外管の４つのコーナ
ー部のうち少なくとも隣り合う２つのコーナー部の内側
に、軸線方向に伸延する広幅かつ平坦な第１の斜切接触
面がそれぞれ形成され、前記第１の斜切接触面を有する
前記外管の２つのコーナー部に対峙する前記内管の２つ
のコーナー部の外側に、同様に軸線方向に伸延する広幅
の平坦な第２の斜切接触面がそれぞれ形成され、前記昇
降枠に垂直方向又は水平方向の負荷がかかった際、前記
第２の斜切接触面が対応する前記第１の斜切接触面に押
圧状態に当接される。According to the present invention, there is provided a semiconductor device comprising:
The elevating frame structure of the elevating frame described above is configured by connecting a pair of vertical members erected at intervals in the horizontal width direction by a plurality of horizontal members arranged at intervals in the up-down direction to form an elevating frame. In a telescopic tube structure of a lifting frame in which each of the vertical members has a telescopic tube structure including an inner tube and an outer tube, the inner tube and the outer tube both have a hollow rectangular cross section, and four corners of the outer tube. A wide and flat first inclined contact surface extending in the axial direction is formed inside at least two adjacent corner portions of the outer tube, and each of the outer tubes having the first inclined contact surface has a wide and flat first inclined contact surface. Outside the two corners of the inner tube facing the two corners, a wide flat second inclined contact surface is also formed, which also extends in the axial direction, and is formed on the lift frame vertically or horizontally. The second beveled contact surface when a load of Into contact with the pressing state to the first beveled contact surface corresponding.
【０００９】ここで、「広幅」とは、内管及び外管の寸
法にもよるが、３ｍｍ〜１５ｍｍとするのが好ましい。
３ｍｍより狭い場合は、第１及び第２の斜切接触面が横
ゆれに対して有効に働かず、一方、１５ｍｍより大きく
すると、内管の外管に対する摺動を円滑に行うことがで
きなくなるおそれがあるからである。また、斜切接触面
の傾斜角度は、好ましくは、当接面に対して３０〜６０
°とするのが好ましい。３０°未満では、第１及び第２
の斜切接触面が横ゆれに対して有効に働かず、６０°よ
り大きい場合は、内管の外管に対する摺動を円滑に行う
ことができなくなるおそれがあるからである。Here, "wide" means 3 mm to 15 mm, although it depends on the dimensions of the inner tube and the outer tube.
If it is smaller than 3 mm, the first and second beveled contact surfaces do not work effectively against side-swing, while if it is larger than 15 mm, the inner pipe cannot slide smoothly on the outer pipe. This is because there is a fear. The angle of inclination of the oblique contact surface is preferably 30 to 60 with respect to the contact surface.
° is preferable. At less than 30 °, the first and second
If the oblique cutting contact surface does not work effectively against the lateral shake and is larger than 60 °, the sliding of the inner tube with respect to the outer tube may not be performed smoothly.
【００１０】請求項２記載の昇降枠の伸縮管構造は、横
幅方向に間隔をあけて立設した一対の垂直部材と、上下
方向に間隔をあけて横架される複数の横架部材と、前記
垂直部材の下端同士を連結する下部連結管と、上端が前
記垂直部材の中途部に揺動自在に枢支されると共に下端
が前記垂直部材の下端面より下方に伸延して床面上に設
置可能な補助垂直部材と、該補助垂直部材と前記下部連
結管間に伸縮自在に介設され、前記補助垂直部材の横幅
方向の張り出し量を規制する張り出し量調整管とから昇
降枠が構成され、前記各補助垂直部材が内管と外管から
なる第１の伸縮管構造を有すると共に前記下部連結管と
前記張り出し量調整管によって内管と外管からなる第２
の伸縮管構造が形成される昇降枠の伸縮管構造におい
て、前記内管と外管が共に中空矩形断面を有し、前記外
管の４つのコーナー部のうち少なくとも隣り合う２つの
コーナー部の内側に、軸線方向に伸延する広幅かつ平坦
な第１の斜切接触面がそれぞれ形成され、前記第１の斜
切接触面を有する前記外管の２つのコーナー部に対峙す
る前記内管の２つのコーナー部の外側に、同様に軸線方
向に伸延する広幅の平坦な第２の斜切接触面がそれぞれ
形成され、前記昇降枠に垂直方向又は水平方向の負荷が
かかった際、前記第２の斜切接触面が対応する前記第１
の斜切接触面に押圧状態に当接される。According to a second aspect of the present invention, there is provided an elevating frame telescopic tube structure, comprising: a pair of vertical members erected at intervals in a horizontal width direction; A lower connecting pipe for connecting the lower ends of the vertical members to each other, and an upper end pivotally supported at an intermediate portion of the vertical member so that the lower end extends downward from a lower end surface of the vertical member and extends on the floor surface. An elevating frame is composed of an installable auxiliary vertical member, and a projecting amount adjusting tube that is stretchably interposed between the auxiliary vertical member and the lower connecting tube and regulates an amount of projecting of the auxiliary vertical member in a lateral width direction. Each of the auxiliary vertical members has a first telescopic tube structure including an inner tube and an outer tube, and a second telescopic tube structure including an inner tube and an outer tube formed by the lower connecting tube and the overhang amount adjusting tube.
In the telescopic tube structure of the elevating frame in which the telescopic tube structure is formed, both the inner tube and the outer tube have a hollow rectangular cross section, and the inside of at least two adjacent corner portions of the four corner portions of the outer tube. A first wide and flat first inclined contact surface extending in the axial direction is formed on each of the two inner tubes facing the two corners of the outer tube having the first inclined contact surface. On the outside of the corner portion, a wide flat second oblique cutting contact surface is also formed, which also extends in the axial direction. When a vertical or horizontal load is applied to the lifting frame, the second oblique contact surface is formed. The first contact surface corresponding to the cutting contact surface
Abuts on the oblique cutting contact surface in a pressed state.
【００１１】請求項３記載の昇降枠の伸縮管構造は、請
求項１又は２記載の昇降枠の伸縮管構造において、前記
外管の４つのコーナー部の内側に、軸線方向に伸延する
広幅かつ平坦な第１の斜切接触面がそれぞれ形成され、
前記外管の４つのコーナー部に対峙する前記内管の４つ
のコーナー部の外側に、同様に軸線方向に伸延する広幅
の平坦な第２の斜切接触面がそれぞれ形成され、前記昇
降枠に垂直方向又は水平方向の負荷がかかった際、前記
第２の斜切接触面が対応する前記第１の斜切接触面に押
圧状態に当接される。According to a third aspect of the present invention, there is provided a telescopic tube structure of a lifting frame according to the first or second aspect, wherein a wide width extending in the axial direction is provided inside the four corners of the outer tube. First flat beveled contact surfaces are respectively formed,
On the outside of the four corners of the inner tube facing the four corners of the outer tube, a wide flat second oblique cutting contact surface also extending in the axial direction is formed, respectively. When a vertical or horizontal load is applied, the second beveled contact surface is brought into contact with the corresponding first beveled contact surface in a pressed state.
【００１２】請求項４記載の開口枠の伸縮管構造は、横
幅方向に間隔をあけて立設した一対の垂直部材の上、下
端部同士を連結して開口枠が構成され、前記各垂直部材
が内管と外管からなる伸縮管構造となっている開口枠の
伸縮管構造において、前記内管と外管が共に中空矩形断
面を有し、前記外管の４つのコーナー部のうち少なくと
も隣り合う２つのコーナー部の内側に、軸線方向に伸延
する広幅かつ平坦な第１の斜切接触面がそれぞれ形成さ
れ、前記第１の斜切接触面を有する前記外管の２つのコ
ーナー部に対峙する前記内管の２つのコーナー部の外側
に、同様に軸線方向に伸延する広幅の平坦な第２の斜切
接触面がそれぞれ形成され、前記開口枠に垂直方向又は
水平方向の負荷がかかった際、前記第２の斜切接触面が
対応する前記第１の斜切接触面に押圧状態に当接され
る。According to a fourth aspect of the present invention, there is provided an opening frame telescopic tube structure, wherein upper and lower ends of a pair of vertical members erected at an interval in the width direction are connected to each other to form an opening frame. In the telescopic tube structure of the opening frame, which has a telescopic tube structure comprising an inner tube and an outer tube, the inner tube and the outer tube both have a hollow rectangular cross section, and at least one of the four corners of the outer tube is adjacent to the outer tube. A wide and flat first inclined contact surface extending in the axial direction is formed inside each of the two fitted corner portions, and faces the two corner portions of the outer tube having the first inclined contact surface. Outside the two corners of the inner pipe, a wide flat second oblique contact surface is formed, which also extends in the axial direction, and a vertical or horizontal load is applied to the opening frame. At this time, the second oblique cutting contact surface corresponds to the first Into contact with the pressing state to the chamfered contact surface.
【００１３】請求項５記載の開口枠の伸縮管構造は、横
幅方向に間隔をあけて立設した一対の垂直部材と、前記
垂直部材の上下端同士を連結する上、下部連結管と、上
端が前記垂直部材の中途部に揺動自在に枢支されると共
に下端が前記垂直部材の下端面より下方に伸延して床面
上に設置可能な補助垂直部材と、該補助垂直部材と前記
下部連結管間に伸縮自在に介設され、前記補助垂直部材
の横幅方向の張り出し量を規制する張り出し量調整管と
から開口枠が構成され、前記各補助垂直部材が内管と外
管からなる第１の伸縮管構造を有すると共に前記下部連
結管と前記張り出し量調整管によって内管と外管からな
る第２の伸縮管構造が形成される開口枠の伸縮管構造に
おいて、前記内管と外管が共に中空矩形断面を有し、前
記外管の４つのコーナー部のうち少なくとも隣り合う２
つのコーナー部の内側に、軸線方向に伸延する広幅かつ
平坦な第１の斜切接触面がそれぞれ形成され、前記第１
の斜切接触面を有する前記外管の２つのコーナー部に対
峙する前記内管の２つのコーナー部の外側に、同様に軸
線方向に伸延する広幅の平坦な第２の斜切接触面がそれ
ぞれ形成され、前記開口枠に垂直方向又は水平方向の負
荷がかかった際、前記第２の斜切接触面が対応する前記
第１の斜切接触面に押圧状態に当接される。According to a fifth aspect of the present invention, there is provided a telescopic tube structure of an opening frame, wherein a pair of vertical members erected at an interval in a horizontal width direction, an upper and lower connecting pipe connecting the upper and lower ends of the vertical member, and an upper end. An auxiliary vertical member pivotally supported on a middle portion of the vertical member and having a lower end extending downward from a lower end surface of the vertical member and capable of being installed on a floor surface; and the auxiliary vertical member and the lower portion. An opening frame is formed between the connecting pipes so as to be extendable and contractible, and a projecting amount adjusting pipe that regulates the projecting amount of the auxiliary vertical member in the lateral width direction, and each of the auxiliary vertical members includes an inner pipe and an outer pipe. In the telescopic tube structure of an open frame having a telescopic tube structure according to 1 above and wherein a second telescopic tube structure including an inner tube and an outer tube is formed by the lower connecting tube and the overhanging amount adjusting tube, Have a hollow rectangular cross-section and have four cores of the outer tube. Adjacent at least one of the toner section 2
A wide and flat first oblique contact surface extending in the axial direction is formed inside each of the corner portions,
Outside the two corners of the inner tube facing the two corners of the outer tube having the oblique contact surfaces of the above, a wide flat second oblique contact surface, which also extends in the axial direction, is provided. When a vertical or horizontal load is applied to the opening frame, the second oblique contact surface comes into contact with the corresponding first oblique contact surface in a pressed state.
【００１４】請求項６記載の開口枠の伸縮管構造は、請
求項４又は５記載の開口枠の伸縮管構造において、前記
外管の４つのコーナー部の内側に、軸線方向に伸延する
広幅かつ平坦な第１の斜切接触面がそれぞれ形成され、
前記外管の４つのコーナー部に対峙する前記内管の４つ
のコーナー部の外側に、同様に軸線方向に伸延する広幅
の平坦な第２の斜切接触面がそれぞれ形成され、前記開
口枠に垂直方向又は水平方向の負荷がかかった際、前記
第２の斜切接触面が対応する前記第１の斜切接触面に押
圧状態に当接される。According to a sixth aspect of the present invention, there is provided the telescopic pipe structure of the opening frame according to the fourth or fifth aspect, wherein the wide pipe extending in the axial direction is provided inside the four corners of the outer pipe. First flat beveled contact surfaces are respectively formed,
On the outside of the four corners of the inner tube facing the four corners of the outer tube, wide, flat second oblique contact surfaces also extending in the axial direction are formed, respectively. When a vertical or horizontal load is applied, the second beveled contact surface is brought into contact with the corresponding first beveled contact surface in a pressed state.
【００１５】[0015]
【発明の実施の形態】続いて、添付した図面を参照しつ
つ、本発明を具体化した実施の形態につき説明し、本発
明の理解に供する。以下、図１〜図８を参照して、本発
明の一実施の形態に係る昇降枠及び開口枠の伸縮管構造
について説明する。なお、本実施の形態は、この昇降枠
及び開口枠の伸縮管構造を、作業用足場台Ａに適用した
場合である。図１に示すように、作業用足場台Ａは、実
質的に、上面に作業床面１０を有する横長矩形板からな
る足場板１１と、それぞれ上端部が足場板１１の左右端
部に折り畳み連結機構１２、１３を介して折り畳み自在
に連結されると共に、下端が床面１４に載置される昇降
枠１５と開口枠１６を具備する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. Hereinafter, with reference to FIGS. 1 to 8, a description will be given of a telescopic tube structure of an elevating frame and an opening frame according to an embodiment of the present invention. This embodiment is a case where the telescopic tube structure of the lifting frame and the opening frame is applied to the work scaffolding A. As shown in FIG. 1, the working scaffolding table A is substantially a scaffolding board 11 formed of a horizontally long rectangular plate having a working floor surface 10 on the upper surface, and each upper end is connected to the left and right ends of the scaffolding board 11 by folding. It is foldably connected via mechanisms 12 and 13 and has a lifting frame 15 and an opening frame 16 whose lower end is placed on the floor surface 14.
【００１６】ここに、昇降枠１５は、図１、かつ、図３
及び図４に示す側面視において、幅方向に所定の間隔を
開けて垂直方向に伸延し、上端が足場板１１の左端部に
折り畳み連結機構１２を介して連結される垂直部材の一
例である一対の左、右支柱１７、１８と、左、右支柱１
７、１８間に上下方向に間隔を開けて横架される横架部
材の一例である複数の踏み桟１９と、左、右支柱１７、
１８の下端同士を連結する外管の一例である下部連結管
２０と、上端が左、右支柱１７、１８の中途部外側面に
揺動自在に枢支されると共に下端が左、右支柱１７、１
８の下端面より下方に伸延して床面１４に接地可能な補
助垂直部材の一例である左、右補助支柱２１、２２と、
左、右補助支柱２１、２２と下部連結管２０との間に介
設され、左、右補助支柱２１、２２の幅方向の張り出し
量を規制する内管の一例である左、右張り出し量調整管
２３、２４とを具備する。Here, the lifting frame 15 is shown in FIG. 1 and FIG.
4 and a pair of vertical members extending vertically with a predetermined interval in the width direction and being connected to the left end of the scaffold plate 11 via the folding connection mechanism 12 in a side view shown in FIG. Left and right columns 17, 18 and left and right columns 1
A plurality of treads 19, which are examples of a horizontal member which is horizontally suspended at intervals in the vertical direction between the right and left columns 7 and 18;
A lower connecting pipe 20 which is an example of an outer pipe connecting lower ends of the pipes 18 and an upper end thereof is pivotally supported on left and right supports 17 and 18 on the outer side of a middle part thereof and a lower end thereof is a left and right support 17. , 1
Left and right auxiliary columns 21 and 22, which are examples of auxiliary vertical members that extend below the lower end surface of 8 and can contact the floor 14;
Left and right overhang amount adjustment, which is an example of an inner pipe that is interposed between the left and right auxiliary columns 21 and 22 and the lower connecting pipe 20 and regulates the width of the left and right auxiliary columns 21 and 22 in the width direction. Tubes 23 and 24 are provided.
【００１７】左、右補助支柱２１、２２は、図１、図３
〜図５に示すように、それぞれ、外管の一例である揺動
脚２５に対して内管の一例である伸縮脚２６が入れ子式
に、即ち、軸線方向に摺動自在に挿入されている伸縮管
構造を有すると共に、伸縮脚２６を任意の伸縮位置で固
定することができる固定装置２７を具備する。即ち、揺
動脚２５と伸縮脚２６によって第１の伸縮管構造が形成
される。また、図１、図３〜図５に示すように、下部連
結管２０の両端部に対して左、右張り出し量調整管２
３、２４を入れ子式に、即ち、軸線方向に摺動自在に挿
入することによって伸縮管構造が形成されると共に、
左、右張り出し量調整管２３、２４を任意の伸縮位置で
固定することができる固定装置２８を具備する。即ち、
下部連結管２０と左、右張り出し量調整管２３、２４と
によって第２の伸縮管構造が形成される。The left and right supporting columns 21 and 22 are shown in FIGS.
As shown in FIGS. 5 to 5, telescopic legs 26 as an example of an inner tube are inserted into a swinging leg 25 as an example of an outer tube in a nested manner, that is, slidably in the axial direction. A fixing device 27 having a telescopic tube structure and capable of fixing the telescopic leg 26 at an arbitrary telescopic position is provided. That is, a first telescopic tube structure is formed by the swing leg 25 and the telescopic leg 26. Also, as shown in FIGS. 1 and 3 to 5, the left and right overhang amount adjusting pipes 2 with respect to both ends of the lower connecting pipe 20.
A telescopic tube structure is formed by nesting the 3, 24, that is, by slidably inserting in the axial direction,
The apparatus is provided with a fixing device 28 that can fix the left and right overhang amount adjusting tubes 23 and 24 at arbitrary expansion and contraction positions. That is,
A second telescopic tube structure is formed by the lower connecting tube 20 and the left and right overhang amount adjusting tubes 23 and 24.
【００１８】一方、開口枠１６は、図１に示すように、
幅方向に所定の間隔を開けて垂直方向に伸延し、上端が
足場板１１の右端部に折り畳み連結機構１３を介して連
結される垂直部材の一例である一対の左、右支柱２９、
３０と、左、右支柱２９、３０の下端同士を連結する下
部連結管３１と、上端が左、右支柱２９、３０の中途部
外側面に揺動自在に枢支されると共に下端が左、右支柱
２９、３０の下端面より下方に伸延して床面１４に接地
可能な補助垂直部材の一例である左、右補助支柱３２、
３３と、左、右補助支柱３２、３３の幅方向の張り出し
量を規制する左、右張り出し量調整管３４、３５とを具
備する。なお、本実施の形態では、開口枠１６の上部連
結管は、足場板１１の右端部によって形成されている。On the other hand, as shown in FIG.
A pair of left and right columns 29, which are an example of a vertical member that extends in the vertical direction at predetermined intervals in the width direction and whose upper end is connected to the right end of the scaffold plate 11 via the folding connection mechanism 13,
30 and a lower connecting pipe 31 for connecting the lower ends of the left and right columns 29 and 30 to each other; Left and right auxiliary columns 32, which are examples of auxiliary vertical members that extend below the lower end surfaces of the right columns 29 and 30 and can contact the floor surface 14,
33, and left and right overhang amount adjusting tubes 34 and 35 for regulating the overhang amounts of the left and right auxiliary columns 32 and 33 in the width direction. In the present embodiment, the upper connecting pipe of the opening frame 16 is formed by the right end of the scaffold plate 11.
【００１９】補助支柱３２、３３は、図１に示すよう
に、それぞれ、外管の一例である揺動脚３６に対して内
管の一例である伸縮脚３７が入れ子式に摺動自在に挿入
されている伸縮管構造を有すると共に、伸縮脚３７を任
意の伸縮位置で固定することができる固定装置３８を具
備する。即ち、揺動脚３６と伸縮脚３７によって第１の
伸縮管構造が形成される。また、外管の一例である下部
連結管３１の両端部に対して内管の一例である左、右張
り出し量調整管３４、３５を入れ子式に摺動自在に挿入
することによって伸縮管構造が形成されると共に、左、
右張り出し量調整管３４、３５を任意の伸縮位置で固定
することができる固定装置３９を具備する。即ち、下部
連結管３１と左、右張り出し量調整管３４、３５とによ
って第２の伸縮管構造が形成される。As shown in FIG. 1, each of the auxiliary columns 32 and 33 has a telescopic leg 37 as an example of an inner tube slidably inserted into a swinging leg 36 as an example of an outer tube. And a fixing device 38 capable of fixing the telescopic leg 37 at any telescopic position. That is, a first telescopic tube structure is formed by the swing leg 36 and the telescopic leg 37. In addition, the left and right overhanging amount adjusting tubes 34 and 35 as an example of the inner tube are slidably inserted in a nested manner into both ends of the lower connecting tube 31 as an example of the outer tube, so that the telescopic tube structure is formed. Formed and left
There is provided a fixing device 39 that can fix the right overhanging amount adjusting tubes 34 and 35 at arbitrary expansion and contraction positions. That is, the lower telescopic tube 31 and the left and right overhanging amount adjusting tubes 34 and 35 form a second telescopic tube structure.
【００２０】本発明は、上記した構成を有する作業用足
場台Ａにおいて、昇降枠１５の伸縮管構造、及び、開口
枠１６の伸縮管構造を、横ゆれを確実に防止する構成と
したことに特徴を有する。まず、昇降枠１５の伸縮管構
造について説明すると、図３、図５及び図６に示すよう
に、第１の伸縮管構造を形成する揺動脚２５と伸縮脚２
６は、共に、中空矩形断面を有する。そして、図７に示
すように、揺動脚２５の内側をなす２つのコーナー部の
内側に、軸線方向に伸延する広幅かつ平坦な第１の斜切
接触面４０、４１がそれぞれ形成されている。一方、こ
の第１の斜切接触面４０、４１を有する揺動脚２５の２
つのコーナー部に対峙する伸縮脚２６の２つのコーナー
部の外側に、同様に軸線方向に伸延する広幅の平坦な第
２の斜切接触面４２、４３がそれぞれ形成されている。According to the present invention, in the working scaffold A having the above-described structure, the telescopic tube structure of the elevating frame 15 and the telescopic tube structure of the opening frame 16 are configured to surely prevent lateral shaking. Has features. First, the telescopic tube structure of the lifting frame 15 will be described. As shown in FIGS. 3, 5 and 6, the swing leg 25 and the telescopic leg 2 forming the first telescopic tube structure are used.
6 both have a hollow rectangular cross section. Then, as shown in FIG. 7, wide and flat first oblique cutting contact surfaces 40 and 41 extending in the axial direction are formed inside the two corner portions forming the inside of the swinging leg 25, respectively. . On the other hand, the swing leg 25-2 having the first oblique contact surfaces 40, 41
Outside the two corners of the telescopic leg 26 facing the two corners, wide flat second inclined cutting surfaces 42 and 43 which are also extended in the axial direction are formed respectively.
【００２１】そして、使用者が昇降枠１５を利用して足
場板１１まで昇る際に昇降枠１５に垂直方向又は水平方
向の負荷がかかると、図５〜図７に示すように、固定装
置２７によって、第２の斜切接触面４２、４３が第１の
斜切接触面４０、４１に向けてＸ方向に移動し、押圧状
態に当接されることになる。従って、伸縮脚２６のＹ方
向の移動は確実に防止されることになり、伸縮脚２６の
幅方向の横ゆれを確実に防止することができ、使用者は
安心して昇降枠１５を昇降することができると共に、転
倒や落下事故も確実に防止することができる。When a vertical or horizontal load is applied to the lifting frame 15 when the user ascends to the scaffold 11 using the lifting frame 15, as shown in FIGS. As a result, the second oblique cutting contact surfaces 42 and 43 move in the X direction toward the first oblique cutting contact surfaces 40 and 41 and come into contact with the pressed state. Therefore, the movement of the telescopic leg 26 in the Y direction is reliably prevented, and the lateral movement of the telescopic leg 26 in the width direction can be reliably prevented, so that the user can safely lift and lower the lifting frame 15. In addition to this, it is possible to reliably prevent a fall or a fall accident.
【００２２】上記したように、揺動脚２５を伸縮脚２６
に対して第１及び第２の斜切接触面４０、４１、４２、
４３を介して当接することによって、以下の効果も奏す
る。 揺動脚２５と伸縮脚２６は共にコーナー部のみを斜
切しただけなので、中空矩形断面とほぼ同様な断面係数
を確保することができ、昇降枠の伸縮管構造の強度を高
めることができる。As described above, the swing leg 25 is connected to the telescopic leg 26.
, The first and second oblique contact surfaces 40, 41, 42,
By contacting via 43, the following effects are also achieved. Since only the corners of the swing leg 25 and the telescopic leg 26 are cut off only at the corners, it is possible to secure substantially the same section modulus as the hollow rectangular cross section, and it is possible to increase the strength of the telescopic tube structure of the lifting frame.
【００２３】 揺動脚２５と伸縮脚２６は共にコーナ
ー部のみを斜切しただけなので、中空矩形断面と同様に
全周が平坦面から形成され、条溝がないので、ゴミ等を
除去しやすい。 揺動脚と伸縮脚の一方に突条を設け、他方に突条を
嵌入する嵌入溝を設ける場合と比較して、突条がないの
で、揺動脚２５と伸縮脚２６は変形しにくい。Since both the swinging leg 25 and the telescopic leg 26 have only bevels at the corners, the entire periphery is formed of a flat surface similarly to the hollow rectangular cross section, and there is no groove, so that dust and the like can be easily removed. . Compared to a case where a ridge is provided on one of the swinging leg and the telescopic leg, and a fitting groove for fitting the ridge is provided on the other, there is no protruding ridge, so that the rocking leg 25 and the telescopic leg 26 are less likely to be deformed.
【００２４】 第１及び第２の斜切接触面４０、４
１、４２、４３が揺動脚２５と伸縮脚２６のコーナー部
分に設けられているので、第１の斜切接触面４０、４１
間の距離、及び、第２の斜切接触面４２、４３間の距離
を十分に確保でき、捩じりモーメントがかかった場合で
も、斜切接触面４０、４１、４２、４３にかかる面圧を
小さくでき、この面からも昇降枠の伸縮管構造の強度を
高めることができる。 揺動脚２５と伸縮脚２６のコーナー部を斜切するこ
とによって、外観的に小さく見せることができ、昇降枠
の伸縮管構造及び作業用足場台Ａの美観を向上すること
ができる。First and second beveled contact surfaces 40, 4
1, 42, 43 are provided at the corners of the swing leg 25 and the telescopic leg 26, so that the first oblique contact surfaces 40, 41 are provided.
And the distance between the second inclined contact surfaces 42 and 43 can be sufficiently ensured, and even when a torsional moment is applied, the surface pressure applied to the inclined contact surfaces 40, 41, 42 and 43 is increased. And the strength of the telescopic tube structure of the elevating frame can be increased from this aspect as well. By beveling the corners of the swinging leg 25 and the telescopic leg 26, it is possible to make it look small externally, and it is possible to improve the beauty of the telescopic tube structure of the elevating frame and the work scaffold A.
【００２５】また、図１及び図５に示すように、第２の
伸縮管構造を形成する下部連結管２０と左、右張り出し
量調整管２３、２４は、共に、中空矩形断面を有する。
そして、図８に示すように、下部連結管２０の上面側を
なす２つのコーナー部の内側に、軸線方向に伸延する広
幅かつ平坦な第１の斜切接触面４４、４５がそれぞれ形
成されている。一方、図８に示すように、この第１の斜
切接触面４４、４５を有する下部連結管２０の２つのコ
ーナー部に対峙する左、右張り出し量調整管２３、２４
の上面側の２つのコーナー部の外側に、同様に軸線方向
に伸延する広幅の平坦な第２の斜切接触面４６、４７が
それぞれ形成されている。As shown in FIGS. 1 and 5, both the lower connecting pipe 20 and the left and right overhang amount adjusting pipes 23 and 24 forming the second telescopic pipe structure have hollow rectangular cross sections.
As shown in FIG. 8, wide and flat first oblique contact surfaces 44 and 45 extending in the axial direction are formed inside the two corner portions forming the upper surface side of the lower connecting pipe 20, respectively. I have. On the other hand, as shown in FIG. 8, the left and right overhang amount adjusting tubes 23 and 24 facing the two corner portions of the lower connecting tube 20 having the first oblique contact surfaces 44 and 45, respectively.
Outside the two corner portions on the upper surface side of the upper surface, wide flat second oblique cutting contact surfaces 46 and 47 which are also extended in the axial direction are formed respectively.
【００２６】そして、使用者が昇降枠１５を利用して足
場板１１まで昇る際に昇降枠１５に垂直方向又は水平方
向の負荷がかかると、図８に示すように、第２の斜切接
触面４６、４７が対応する第１の斜切接触面４４、４５
に押圧状態に当接されることになる。ここで、図８に示
すように、左、右張り出し量調整管２３、２４は下部連
結管２０に対して第１及び第２の斜切接触面４４、４
５、４６、４７を介して当接されるので、下部連結管２
０は左、右張り出し量調整管２３、２４に対してＸ方
向、即ち、押圧方向のみならずＹ方向、即ち、幅方向の
横ゆれも確実に防止されることになる。従って、使用者
は安心して昇降枠１５を昇降することができると共に、
転倒や落下事故も確実に防止することができる。When a vertical or horizontal load is applied to the lifting frame 15 when the user ascends to the scaffold plate 11 using the lifting frame 15, as shown in FIG. The first beveled contact surfaces 44, 45 to which the surfaces 46, 47 correspond
Is brought into contact with the pressed state. Here, as shown in FIG.
5, 46, 47, the lower connecting pipe 2
A value of 0 reliably prevents lateral displacement in the X direction, that is, the pressing direction as well as the Y direction, that is, the width direction, with respect to the left and right overhang amount adjustment tubes 23, 24. Therefore, the user can move the lifting frame 15 up and down with ease.
Falling and falling accidents can also be reliably prevented.
【００２７】次に、開口枠１６の伸縮管構造について説
明すると、図示しないが、開口枠１６の伸縮管構造にお
いて第１の伸縮管構造を形成する揺動脚３６と伸縮脚３
７は、昇降枠１５の揺動脚２５と伸縮脚２６と同様に相
互に当接する第１及び第２の斜切接触面からなる横ゆれ
防止構造を有している。従って、揺動脚３６は地面に接
地固定されている伸縮脚３７に対して第１及び第２の斜
切接触面を介して当接されるので、揺動脚３６はＸ方向
のみならずＹ方向、即ち、横幅方向の横ゆれも確実に防
止されることになる。従って、使用者は安心して、開口
枠１６と反対側にある昇降枠１５を利用して昇降するこ
とができると共に、転倒や落下事故も確実に防止するこ
とができる。Next, the telescopic tube structure of the opening frame 16 will be described. Although not shown, the swing leg 36 and the telescopic leg 3 forming the first telescopic tube structure in the telescopic tube structure of the opening frame 16 are not shown.
Numeral 7 has a lateral sway prevention structure including first and second oblique cutting contact surfaces which come into contact with each other similarly to the swinging leg 25 and the telescopic leg 26 of the lifting frame 15. Therefore, since the swinging leg 36 is in contact with the telescopic leg 37 fixed to the ground on the ground via the first and second oblique contact surfaces, the swinging leg 36 is moved not only in the X direction but also in the Y direction. The direction, that is, the lateral displacement in the lateral width direction is also reliably prevented. Therefore, the user can ascend and descend using the elevating frame 15 on the opposite side of the opening frame 16 with assurance, and can surely prevent a fall or a fall accident.
【００２８】また、図示しないが、第２の伸縮管構造を
形成する下部連結管３１と左、右張り出し量調整管３
４、３５は、昇降枠１５の下部連結管２０と左、右張り
出し量調整管２３、２４と同様に相互に当接する第１及
び第２の斜切接触面からなる横ゆれ防止構造を有してい
る。従って、下部連結管３１は地面に接地固定されてい
る伸縮脚３７を介して揺動脚３６に連設されている左、
右張り出し量調整管３４、３５に対して第１及び第２の
斜切接触面を介して当接されるので、下部連結管３１は
Ｘ方向の縦ぶれのみならずＹ方向、即ち、横幅方向の横
ゆれも確実に防止されることになる。従って、使用者は
安心して、開口枠１６と反対側にある昇降枠１５を利用
して昇降することができると共に、転倒や落下事故も確
実に防止することができる。Although not shown, the lower connecting pipe 31 and the left and right overhanging amount adjusting pipes 3 forming the second telescopic pipe structure.
Reference numerals 4 and 35 each have a side-slip prevention structure including first and second oblique cutting contact surfaces that come into contact with each other similarly to the lower connecting tube 20 of the lifting frame 15 and the left and right overhanging amount adjusting tubes 23 and 24. ing. Therefore, the lower connecting pipe 31 is connected to the swinging leg 36 via the telescopic leg 37 fixed to the ground, and
Since the right overhang amount adjusting tubes 34 and 35 are in contact with the first and second oblique contact surfaces via the first and second oblique contact surfaces, the lower connecting tube 31 is not only vertically displaced in the X direction but also in the Y direction, that is, in the width direction. Is surely prevented. Therefore, the user can ascend and descend using the lift frame 15 on the opposite side of the opening frame 16 with a sense of security, and also can reliably prevent a fall or a fall accident.
【００２９】図９及び図１０に上記した揺動脚２５と伸
縮脚２６を具備する昇降枠１５の第１の伸縮管構造の変
形例を示す。図示するように、揺動脚２５に対応する外
管の一例である揺動脚５０は、４つのコーナー部の内側
に、軸線方向に伸延する広幅かつ平坦な第１の斜切接触
面５１〜５４がそれぞれ形成され、揺動脚５０の４つの
コーナー部に対峙する内管の一例である伸縮脚５５の４
つのコーナー部の外側に、同様に軸線方向に伸延する広
幅の平坦な第２の斜切接触面５６〜５９がそれぞれ形成
されている。FIGS. 9 and 10 show a modification of the first telescopic tube structure of the elevating frame 15 having the swinging leg 25 and the telescopic leg 26 described above. As shown in the figure, the swing leg 50, which is an example of an outer tube corresponding to the swing leg 25, has a wide and flat first oblique cutting contact surface 51 to 51 extending in the axial direction inside four corner portions. 54 are formed and extendable legs 55-4 which are examples of an inner tube facing the four corners of the swing leg 50
Outside the corners, wide, flat, second beveled contact surfaces 56 to 59 are formed, which also extend in the axial direction.
【００３０】そして、図１０に示すように、使用者が昇
降枠１５ａを利用して足場板１１まで昇る際に昇降枠１
５ａに垂直方向又は水平方向の負荷がかかると、固定装
置２７ａによって、第２の斜切接触面５６、５７が第１
の斜切接触面５１、５２に向けてＸ方向に移動し、押圧
状態に当接されることになる。従って、伸縮脚５５の揺
動脚５０に対するＹ方向の移動は確実に防止されること
になり、伸縮脚５５の幅方向の横ゆれを確実に防止する
ことができ、使用者は安心して昇降枠１５ａを昇降する
ことができると共に、転倒や落下事故も確実に防止する
ことができる。Then, as shown in FIG. 10, when the user climbs up to the scaffold plate 11 using the lifting frame 15a, the lifting frame 1
When a vertical or horizontal load is applied to 5a, the second oblique contact surfaces 56, 57 are moved to the first position by the fixing device 27a.
Are moved in the X direction toward the oblique contact surfaces 51 and 52 of FIG. Accordingly, the movement of the telescopic leg 55 in the Y direction with respect to the swing leg 50 is reliably prevented, and the lateral movement of the telescopic leg 55 in the width direction can be reliably prevented, so that the user can safely move the elevating frame. 15a can be raised and lowered, and a fall or a fall accident can be reliably prevented.
【００３１】また、図９において、揺動脚５０と伸縮脚
５５の４つのコーナー部に第１及び第２の斜切接触面５
１〜５４、５６〜５９を設けることによって、ｃ点にお
いて第１及び第２の斜切接触面５３、５４、５８、５９
を当接させることができると共に、ｄ点において、第１
及び第２の斜切接触面５１、５２、５６、５７を当接さ
せることができる。即ち、軸線方向に間隔をあけた２点
において揺動脚５０に対する伸縮脚５５を横ゆれを防止
することができる。また、下部連結管２０と対応する下
部連結管６０と左張り出し量調整管２３に対応する内管
の一例である張り出し量調整管６１についても、図９で
示したように、４つのコーナー部に第１及び第２の斜切
接触面を設けることによって、ｅ点及びｆ点において、
下部連結管６０の第１の斜切接触面と張り出し量調整管
６１の第２の斜切接触面とを当接させることができる。
即ち、軸線方向に間隔をあけた２点において、下部連結
管６０と張り出し量調整管６１との間の横ゆれを防止す
ることができる。従って、使用者はより安全に昇降枠１
５ａを昇降したり足場板１１上を移動することができ
る。なお、図９に示す左支柱１７ａ、固定装置２７ａ
は、図１に示す左支柱１７、固定装置２７と対応する。In FIG. 9, first and second oblique cutting contact surfaces 5 are provided at four corners of the swinging leg 50 and the telescopic leg 55.
By providing 1 to 54, 56 to 59, the first and second oblique contact surfaces 53, 54, 58, 59 at the point c.
Can be brought into contact with each other, and at the point d, the first
And the second oblique cutting contact surfaces 51, 52, 56, 57 can be brought into contact. In other words, it is possible to prevent the telescopic leg 55 from swaying relative to the swing leg 50 at two points spaced apart in the axial direction. Also, as shown in FIG. 9, the lower connection pipe 60 corresponding to the lower connection pipe 20 and the overhang amount adjustment pipe 61 which is an example of the inner pipe corresponding to the left overhang amount adjustment pipe 23 have four corner portions as shown in FIG. By providing the first and second oblique contact surfaces, at points e and f,
The first oblique contact surface of the lower connecting tube 60 and the second oblique contact surface of the overhang amount adjusting tube 61 can be brought into contact with each other.
That is, it is possible to prevent the lateral displacement between the lower connecting pipe 60 and the overhang amount adjusting pipe 61 at two points spaced apart in the axial direction. Therefore, the user can safely move up and down the frame 1
5a can be moved up and down and on the scaffold plate 11. The left support 17a and the fixing device 27a shown in FIG.
Corresponds to the left support 17 and the fixing device 27 shown in FIG.
【００３２】図１１に上記した実施の形態の変形例に係
る昇降枠及び開口枠の伸縮管構造を有する作業用足場台
Ａ１を示す。図示するように、本変形例に係る作業用足
場台Ａ１は、図１に示す作業用足場台Ａと異なり、左、
右補助支柱２１、２２、３２、３３に相当する補助支柱
を具備していない。一方、図１に示す作業用足場台Ａに
おいて昇降枠１５を形成する垂直部材１７、１８や、開
口枠１６を形成する垂直部材２９、３０に相当する垂直
部材７０〜７３を、それぞれ、外管の一例である固定脚
７４と、内管の一例である伸縮脚７５とからなる伸縮管
構造によって構成している。なお、本変形例において
も、垂直部材７０、７１と踏み桟７６によって昇降枠７
７が構成されており、垂直部材７２、７３と上、下部連
結管７８、７８ａによって開口枠７９が構成されてい
る。FIG. 11 shows a working scaffold A1 having a telescopic tube structure of a lifting frame and an opening frame according to a modification of the above embodiment. As illustrated, the work scaffold A1 according to the present modification is different from the work scaffold A shown in FIG.
Auxiliary columns corresponding to the right auxiliary columns 21, 22, 32, 33 are not provided. On the other hand, the vertical members 17 and 18 forming the lifting frame 15 and the vertical members 70 to 73 corresponding to the vertical members 29 and 30 forming the opening frame 16 in the work scaffold A shown in FIG. , And a telescopic leg structure including a telescopic leg 75 as an example of an inner tube. In this modification, the vertical members 70 and 71 and the stepping bar 76 are used to lift the lifting frame 7.
7, an opening frame 79 is formed by the vertical members 72 and 73 and the upper and lower connecting pipes 78 and 78a.
【００３３】そして、これらの固定脚７４と伸縮脚７５
も、図１等を参照して説明してきた揺動脚２５及び伸縮
脚２６と同様に、共に中空矩形断面を有し、かつ、固定
脚７４の４つのコーナー部のうち少なくとも隣り合う２
つのコーナー部の内側に、軸線方向に伸延する広幅かつ
平坦な第１の斜切接触面がそれぞれ形成され、第１の斜
切接触面を有する固定脚７４の２つのコーナー部に対峙
する伸縮脚７５の２つのコーナー部の外側に、同様に軸
線方向に伸延する広幅の平坦な第２の斜切接触面がそれ
ぞれ形成されている。従って、昇降枠７７や開口枠７９
において、垂直方向又は水平方向又は水平方向の負荷が
かかった際、第２の斜切接触面が対応する第１の斜切接
触面に押圧状態に当接されることになり、固定脚７４は
Ｘ方向のみならずＹ方向、即ち、横幅方向の横ゆれも確
実に防止されることになる。従って、使用者は安心し
て、開口枠７９と反対側にある昇降枠７７を利用して昇
降することができると共に、転倒や落下事故も確実に防
止することができる。The fixed leg 74 and the telescopic leg 75
Also, like the swing leg 25 and the telescopic leg 26 described with reference to FIG. 1 and the like, both have a hollow rectangular cross-section, and at least two of the four corners of the fixed leg 74 are adjacent to each other.
A wide and flat first oblique contact surface extending in the axial direction is formed inside each of the two corner portions, and the telescopic legs oppose the two corner portions of the fixed leg 74 having the first oblique contact surface. Outside the two corners of 75 are formed, respectively, wide, flat second oblique contact surfaces which also extend in the axial direction. Therefore, the lifting frame 77 and the opening frame 79
When a vertical, horizontal, or horizontal load is applied, the second inclined contact surface comes into contact with the corresponding first inclined contact surface in a pressed state, and the fixed leg 74 is Not only in the X direction but also in the Y direction, that is, in the lateral width direction, the lateral displacement can be reliably prevented. Therefore, the user can ascend and descend using the elevating frame 77 on the opposite side of the opening frame 79 with peace of mind, and also can reliably prevent a fall or a fall accident.
【００３４】上記した実施の形態におけるその他の構成
について説明すると、図１に示す作業用足場台Ａにおい
て、固定装置２７、３８は、本出願人が先に特開平９−
１７７４６０号公報において開示した固定装置と同様な
構成を有する。即ち、伸縮脚２６、３７の外側面にはラ
ック溝が設けられ、このラック溝には、固定装置２７、
３８内に設けられスプリングによって係合方向に付勢さ
れたラック歯が着脱自在に係合されている。従って、伸
縮脚２６、３７を任意の長さだけ伸長した後、固定装置
２７、３８によってラック溝にラック歯を係合させるこ
とによって床面１４からの足場板１１までの高さを調整
することができる。なお、図９に示す固定装置２７ａも
同様な構成を有する。The other configuration in the above embodiment will be described. In the work scaffold A shown in FIG.
It has a configuration similar to that of the fixing device disclosed in Japanese Patent No. 177460. That is, rack grooves are provided on the outer surfaces of the telescopic legs 26, 37, and the fixing devices 27,
The rack teeth provided in the bracket 38 and urged in the engagement direction by a spring are detachably engaged. Therefore, the height from the floor surface 14 to the scaffold plate 11 is adjusted by engaging the rack teeth with the rack grooves by the fixing devices 27 and 38 after extending the telescopic legs 26 and 37 by an arbitrary length. Can be. The fixing device 27a shown in FIG. 9 has a similar configuration.
【００３５】また、図１に示す固定装置２８、３９も、
本出願人が先に特開平９−１７７４６０号公報において
開示した固定装置と同様な構成を有する。即ち、図５に
おいて、左、右張り出し量調整管２３、２４の端部内側
には、板ばねをＵ字状に曲げて収納配設しており、同板
ばねの一端に凸部を形成し、この凸部を左、右張り出し
量調整管２３、２４に形成した孔に係合させると共に、
板ばねの他端に位置決めピン６２を取付け、下部連結管
２０の側壁に設けた位置決め孔６３及び左、右張り出し
量調整管２３、２４に設けた貫通孔を挿通可能としてい
る。なお、下部連結管２０には複数の位置決め孔６３、
６４が設けられている。The fixing devices 28 and 39 shown in FIG.
It has the same configuration as the fixing device disclosed by the present applicant in Japanese Patent Application Laid-Open No. Hei 9-177460. That is, in FIG. 5, a leaf spring is bent and stored in a U-shape inside the ends of the left and right overhang amount adjusting tubes 23 and 24, and a convex portion is formed at one end of the leaf spring. The protrusions are engaged with holes formed in the left and right overhang amount adjusting tubes 23 and 24,
A positioning pin 62 is attached to the other end of the leaf spring so that a positioning hole 63 provided on the side wall of the lower connecting pipe 20 and through holes provided in the left and right overhang amount adjusting pipes 23 and 24 can be inserted. The lower connecting pipe 20 has a plurality of positioning holes 63,
64 are provided.
【００３６】かかる構成によって、位置決めピン６２の
先端部を下部連結管２０の内部側に押し込み、位置決め
ピン６２と位置決め孔６３と貫通孔との嵌合状態を開放
することにより、左、右張り出し量調整管２３、２４を
摺動自在とすることができるようになっている。また、
左、右張り出し量調整管２３、２４を摺動して、位置決
めピン６２が位置決め孔６４の位置にくると、再び位置
決めピン６２と位置決め孔６４及び貫通孔が嵌合状態と
なり、左、右張り出し量調整管２３、２４が下部連結管
２０より摺動できないようにして、左、右張り出し量調
整管２３、２４の左右外側への張り出し量を調整できる
ようにしている。なお、図１に示す実施の形態では、位
置決め孔６３、６４を左右２か所設けているので、左、
右張り出し量調整管２３、２４の張り出し量をそれぞれ
２段階に規制することができる。なお、図９に示す変形
例においても、同様な位置決めピン６５と位置決め孔６
６、６７が設けられている。With this configuration, the distal end of the positioning pin 62 is pushed into the inside of the lower connecting pipe 20 to release the fitting state between the positioning pin 62, the positioning hole 63, and the through hole, so that the left and right protrusion amounts are increased. The adjusting tubes 23 and 24 can be slid freely. Also,
When the positioning pin 62 comes to the position of the positioning hole 64 by sliding the left and right overhanging amount adjusting pipes 23 and 24, the positioning pin 62, the positioning hole 64 and the through hole are in the fitted state again, and the left and right overhangs. The amount adjustment tubes 23 and 24 are prevented from sliding with respect to the lower connecting tube 20 so that the left and right overhang amount adjustment tubes 23 and 24 can adjust the amount of protrusion to the left and right outside. In the embodiment shown in FIG. 1, since two positioning holes 63 and 64 are provided on the left and right,
The overhang amount of the right overhang amount adjustment tubes 23 and 24 can be regulated in two stages. In the modification shown in FIG. 9, similar positioning pins 65 and positioning holes 6 are also provided.
6, 67 are provided.
【００３７】また、図１、図５において、左、右張り出
し量調整管２３、２４の端部には短筒からなる受金６８
が枢ピン６９により揺動自在に取付けられている。そし
て、受金６８には揺動脚２５が摺動自在に保持されてい
る。従って、左、右張り出し量調整管２３、２４が伸縮
しても、受金６８が左、右張り出し量調整管２３、２４
に対して揺動し、かつ、揺動脚２５に対して摺動するの
で、左、右張り出し量調整管２３、２４を水平状態に保
つことができる。In FIGS. 1 and 5, the left and right overhanging amount adjusting tubes 23 and 24 have ends 68 made of short cylinders at their ends.
Are pivotally mounted by a pivot pin 69. The swing leg 25 is slidably held by the receiving metal 68. Therefore, even if the left and right overhanging amount adjusting tubes 23 and 24 expand and contract, the receiving member 68 can move the left and right overhanging amount adjusting tubes 23 and 24.
, And slide with respect to the swinging leg 25, so that the left and right overhanging amount adjusting tubes 23, 24 can be kept horizontal.
【００３８】以上、本発明を、一実施の形態を参照して
説明してきたが、本発明は何ら上記した実施の形態に記
載の構成に限定されるものではなく、特許請求の範囲に
記載されている事項の範囲内で考えられるその他の実施
の形態や変形例も含むものである。As described above, the present invention has been described with reference to an embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and is described in the claims. It also includes other embodiments and modifications that can be considered within the scope of the matters described.
【００３９】[0039]
【発明の効果】請求項１〜６記載の昇降枠及び開口枠の
伸縮管構造においては、外管の４つのコーナー部のうち
少なくとも隣り合う２つのコーナー部の内側に、軸線方
向に伸延する広幅かつ平坦な第１の斜切接触面がそれぞ
れ形成され、外管の２つのコーナー部に対峙する内管の
２つのコーナー部の外側に、同様に軸線方向に伸延する
広幅の平坦な第２の斜切接触面を形成し、昇降枠や開口
枠に垂直方向又は水平方向の負荷がかかった際、第２の
斜切接触面が第１の斜切接触面に押圧状態に当接される
ようにしている。従って、内管は外管に対して押圧方向
に固定保持されるのみでなく、幅方向に固定保持される
ので、幅方向の横ゆれも確実に防止されることになり、
使用者は安心して昇降枠を昇降することができると共
に、転倒や落下事故も確実に防止することができる。According to the telescopic tube structure of the lifting frame and the opening frame according to the first to sixth aspects, a wide width extending in the axial direction at least inside two adjacent corner portions of the four corner portions of the outer tube. And a first flat beveled contact surface is formed respectively, and a wide flat second extending also in the axial direction outside the two corners of the inner tube facing the two corners of the outer tube. The oblique contact surface is formed such that when a vertical or horizontal load is applied to the lifting frame or the opening frame, the second oblique contact surface is pressed against the first oblique contact surface. I have to. Therefore, the inner pipe is not only fixedly held in the pressing direction with respect to the outer pipe, but also fixedly held in the width direction, so that lateral sway in the width direction is reliably prevented,
The user can safely move up and down the lifting frame, and can reliably prevent a fall or a fall accident.
【００４０】外管と内管は共にコーナー部のみを斜切し
ただけなので、中空矩形断面とほぼ同様な断面係数を確
保することができ、昇降枠の伸縮管構造の強度を高める
ことができる。外管と内管は共にコーナー部のみを斜切
しただけなので、中空矩形断面と同様に全周が平坦面か
ら形成され、条溝がないので、ゴミ等を除去しやすい。
外管と内管の一方に突条を設け、他方に突条を嵌入する
嵌入溝を設ける場合と比較して、突条がないので、外管
と内管は変形しにくい。Since both the outer pipe and the inner pipe have only the oblique cuts at the corners, it is possible to secure substantially the same section modulus as that of the hollow rectangular section, and it is possible to increase the strength of the telescopic pipe structure of the lifting frame. Since both the outer pipe and the inner pipe have only bevels at the corners, the entire circumference is formed of a flat surface similarly to the hollow rectangular cross section, and there are no grooves, so that dust and the like can be easily removed.
Compared to a case where a protrusion is provided on one of the outer tube and the inner tube and a fitting groove for fitting the protrusion on the other is provided, the outer tube and the inner tube are less likely to be deformed because there is no protrusion.
【００４１】第１及び第２の斜切接触面が外管と内管の
コーナー部分に設けられているので、第１の斜切接触面
間の距離、及び、第２の斜切接触面間の距離を十分に確
保でき、捩じりモーメントがかかった場合でも、第１及
び第２の斜切接触面にかかる面圧を小さくでき、この面
からも昇降枠の伸縮管構造の強度を高めることができ
る。外管と内管のコーナー部を斜切することによって、
外観的に小さく見せることができ、昇降枠又は開口枠の
伸縮管構造及びそれを用いた梯子、梯子兼用脚立、脚
立、足場作業台、作業タワー等の美観を向上することが
できる。Since the first and second inclined contact surfaces are provided at the corners of the outer tube and the inner tube, the distance between the first inclined contact surface and the distance between the second inclined contact surface Can be sufficiently secured, and even when a torsional moment is applied, the surface pressure applied to the first and second oblique contact surfaces can be reduced, and from this surface the strength of the telescopic tube structure of the lifting frame can be increased. be able to. By beveling the corners of the outer and inner pipes,
The appearance can be made small, and the aesthetic appearance of the telescopic tube structure of the elevating frame or the opening frame and the ladder, the ladder combined stepladder, the stepladder, the scaffolding work table, the work tower and the like using the same can be improved.
【００４２】請求項２及び５記載の昇降枠及び開口枠の
伸縮管構造においては、補助垂直部材を構成する内管と
外管とからなる第１の伸縮管構造において、第１及び第
２の斜切接触面を押圧状態に当接させることによって補
助垂直部材の幅方向の横ゆれを確実に防止することがで
きると共に、外管となる下部連結管と内管となる張り出
し量調整管とからなる第２の伸縮脚構造において、第１
及び第２の斜切接触面を押圧状態に当接させることによ
って下部連結管の幅方向の横ゆれを確実に防止すること
ができる。従って、使用者はさらに安全に昇降枠を昇降
したり足場板上で移動することができると共に、転倒や
落下事故もより確実に防止することができる。According to a second aspect of the present invention, in the first telescopic tube structure including the inner pipe and the outer pipe constituting the auxiliary vertical member, the first and second telescopic pipe structures are provided. By contacting the oblique contact surface in a pressed state, it is possible to reliably prevent the lateral displacement of the auxiliary vertical member in the width direction, and from the lower connecting pipe serving as the outer pipe and the protrusion amount adjusting pipe serving as the inner pipe. In the second telescopic leg structure,
In addition, by causing the second oblique cutting contact surface to come into contact with the pressed state, it is possible to reliably prevent the lower connecting pipe from laterally swaying. Therefore, the user can further safely move up and down the elevating frame and move on the scaffold plate, and can more reliably prevent a fall or a fall accident.
【００４３】請求項３及び６記載の昇降枠及び開口枠の
伸縮管構造においては、外管の４つのコーナー部の内側
に、軸線方向に伸延する広幅かつ平坦な第１の斜切接触
面がそれぞれ形成され、外管の４つのコーナー部に対峙
する内管の４つのコーナー部の外側に、同様に軸線方向
に伸延する広幅の平坦な第２の斜切接触面がそれぞれ形
成され、昇降枠や開口枠に垂直方向又は水平方向の負荷
がかかった際、第２の斜切接触面が対応する第１の斜切
接触面に押圧状態に当接されるようにしている。従っ
て、外管と内管は軸線方向に間隔をあけた２点において
横ゆれを防止することができ、使用者はより安全に昇降
枠を昇降したり、足場板上を移動することができる。In the telescopic tube structure of the lifting frame and the opening frame according to the third and sixth aspects, a wide and flat first oblique cutting contact surface extending in the axial direction is provided inside the four corner portions of the outer tube. A wide flat second oblique contact surface, which also extends in the axial direction, is formed outside each of the four corners of the inner tube that are formed and that face the four corners of the outer tube. When a load in the vertical direction or horizontal direction is applied to the opening frame or the opening frame, the second oblique contact surface is brought into contact with the corresponding first oblique contact surface in a pressed state. Therefore, the outer pipe and the inner pipe can be prevented from swaying at two points spaced apart in the axial direction, and the user can move up and down the lifting frame and move on the scaffold more safely.
【図１】本発明の一実施の形態に係る昇降枠及び開口枠
の伸縮管構造を具備する作業用足場台の斜視図である。FIG. 1 is a perspective view of a working scaffolding provided with a telescopic tube structure of a lifting frame and an opening frame according to an embodiment of the present invention.
【図２】本発明の一実施の形態に係る昇降枠及び開口枠
の伸縮管構造を具備する作業用足場台の正面図である。FIG. 2 is a front view of a working scaffolding provided with a telescopic tube structure of a lifting frame and an opening frame according to an embodiment of the present invention.
【図３】本発明の一実施の形態に係る昇降枠の伸縮管構
造を具備する作業用足場台の側面図である。FIG. 3 is a side view of a working scaffold having a telescopic structure of a lifting frame according to an embodiment of the present invention.
【図４】本発明の一実施の形態に係る昇降枠の伸縮管構
造を具備する作業用足場台の側面図である。FIG. 4 is a side view of a working scaffolding provided with a telescopic structure of a lifting frame according to an embodiment of the present invention.
【図５】本発明の一実施の形態に係る昇降枠の伸縮管構
造の要部拡大側面図である。FIG. 5 is an enlarged side view of a main part of a telescopic tube structure of a lifting frame according to an embodiment of the present invention.
【図６】図５のIII −III 線による矢視図である。FIG. 6 is a view taken along the line III-III in FIG. 5;
【図７】図３のＩ−Ｉ線による断面図である。FIG. 7 is a sectional view taken along line II of FIG. 3;
【図８】図３のII−II線による断面図である。FIG. 8 is a sectional view taken along line II-II of FIG.
【図９】本発明の一実施の形態の変形例に係る昇降枠の
伸縮管構造における揺動脚と伸縮脚の要部拡大側面図で
ある。FIG. 9 is an enlarged side view of a main part of a swing leg and a telescopic leg in a telescopic tube structure of a lifting frame according to a modification of the embodiment of the present invention.
【図１０】図９のIV−IV線による断面図である。FIG. 10 is a sectional view taken along line IV-IV in FIG. 9;
【図１１】本発明の一実施の形態の変形例に係る昇降枠
及び開口枠を具備する作業用足場台の斜視図である。FIG. 11 is a perspective view of a working scaffold having a lifting frame and an opening frame according to a modification of the embodiment of the present invention.
【図１２】従来の昇降枠の伸縮管構造を具備する作業用
足場台の斜視図である。FIG. 12 is a perspective view of a conventional work scaffolding having a telescopic structure of a lifting frame.
【図１３】従来の昇降枠の伸縮管構造における揺動脚と
伸縮脚の断面図である。FIG. 13 is a cross-sectional view of a swinging leg and a telescopic leg in a conventional telescopic tube structure of a lifting frame.
【図１４】従来の昇降枠の伸縮管構造を具備する作業用
足場台の側面図である。FIG. 14 is a side view of a conventional work scaffolding provided with a telescopic tube structure of a lifting frame.
Ａ 作業用足場台 Ａ１ 作業用足
場台 １０ 作業床面 １１ 足場板 １２ 折り畳み連結機構 １３ 折り畳み
連結機構 １４ 床面 １５ 昇降枠 １５ａ 昇降枠 １６ 開口枠 １７ 左支柱 １７ａ 左支柱 １８ 右支柱 １９ 踏み桟 ２０ 下部連結管 ２１ 左補助支
柱 ２２ 右補助支柱 ２３ 左張り出
し量調整管 ２４ 右張り出し量調整管 ２５ 揺動脚 ２６ 伸縮脚 ２７ 固定装置 ２７ａ 固定装置 ２８ 固定装置 ２９ 左支柱 ３０ 右支柱 ３１ 下部連結管 ３２ 左補助支
柱 ３３ 右補助支柱 ３４ 左張り出
し量調整管 ３５ 右張り出し量調整管 ３６ 揺動脚 ３７ 伸縮脚 ３８ 固定装置 ３９ 固定装置 ４０ 第１の斜
切接触面 ４１ 第１の斜切接触面 ４２ 第２の斜
切接触面 ４３ 第２の斜切接触面 ４４ 第１の斜
切接触面 ４５ 第１の斜切接触面 ４６ 第２の斜
切接触面 ４７ 第２の斜切接触面 ５０ 揺動脚 ５１ 第１の斜切接触面 ５２ 第１の斜
切接触面 ５３ 第１の斜切接触面 ５４ 第１の斜
切接触面 ５５ 伸縮脚 ５６ 第２の斜
切接触面 ５７ 第２の斜切接触面 ５８ 第２の斜
切接触面 ５９ 第２の斜切接触面 ６０ 下部連結
管 ６１ 張り出し量調整管 ６２ 位置決め
ピン ６３ 位置決め孔 ６４ 位置決め
孔 ６５ 位置決めピン ６６ 位置決め
孔 ６７ 位置決め孔 ６８ 受金 ６９ 枢ピン ７０ 垂直部材 ７１ 垂直部材 ７２ 垂直部材 ７３ 垂直部材 ７４ 固定脚 ７５ 伸縮脚 ７６ 踏み桟 ７７ 昇降枠 ７８ 下部連結
管 ７８ａ 下部連結管 ７９ 開口枠A scaffolding for work A1 scaffolding for work 10 work floor surface 11 scaffold plate 12 folding connection mechanism 13 folding connection mechanism 14 floor surface 15 lifting frame 15a lifting frame 16 opening frame 17 left support 17a left support 18 right support 19 stepping beam 20 Lower connecting pipe 21 Left auxiliary support 22 Right auxiliary support 23 Left overhang amount adjustment pipe 24 Right overhang amount adjustment pipe 25 Swinging leg 26 Telescopic leg 27 Fixing device 27a Fixing device 28 Fixing device 29 Left support 30 Right support 31 Lower connecting tube 32 Left auxiliary support 33 Right auxiliary support 34 Left overhang amount adjustment tube 35 Right overhang amount adjustment tube 36 Swing leg 37 Telescopic leg 38 Fixing device 39 Fixing device 40 First oblique contact surface 41 First oblique contact surface 42 First 2 inclined contact surface 43 second inclined contact surface 44 first inclined contact surface 45 first inclined contact surface 46 second inclined contact surface 4 Second oblique cutting contact surface 50 swing leg 51 first oblique cutting contact surface 52 first oblique cutting contact surface 53 first oblique cutting contact surface 54 first oblique cutting contact surface 55 telescopic leg 56 second Oblique contact surface 57 Second oblique contact surface 58 Second oblique contact surface 59 Second oblique contact surface 60 Lower connecting pipe 61 Overhang amount adjusting pipe 62 Positioning pin 63 Positioning hole 64 Positioning hole 65 Positioning pin 66 Positioning hole 67 Positioning hole 68 Receptacle 69 Pivot pin 70 Vertical member 71 Vertical member 72 Vertical member 73 Vertical member 74 Fixed leg 75 Telescopic leg 76 Stepping bar 77 Elevating frame 78 Lower connecting tube 78a Lower connecting tube 79 Opening frame
Claims (6)
垂直部材を、上下方向に間隔をあけて配設した複数の横
架部材によって連結して昇降枠が構成され、前記各垂直
部材が内管と外管からなる伸縮管構造となっている昇降
枠の伸縮管構造において、 前記内管と外管が共に中空矩形断面を有し、前記外管の
４つのコーナー部のうち少なくとも隣り合う２つのコー
ナー部の内側に、軸線方向に伸延する広幅かつ平坦な第
１の斜切接触面がそれぞれ形成され、前記第１の斜切接
触面を有する前記外管の２つのコーナー部に対峙する前
記内管の２つのコーナー部の外側に、同様に軸線方向に
伸延する広幅の平坦な第２の斜切接触面がそれぞれ形成
され、前記昇降枠に垂直方向又は水平方向の負荷がかか
った際、前記第２の斜切接触面が対応する前記第１の斜
切接触面に押圧状態に当接されることを特徴とする昇降
枠の伸縮管構造。1. A vertical frame is formed by connecting a pair of vertical members standing up at intervals in the horizontal width direction by a plurality of horizontal members arranged at intervals in the vertical direction. Is a telescopic tube structure of an elevating frame having an telescopic tube structure comprising an inner tube and an outer tube, wherein the inner tube and the outer tube both have a hollow rectangular cross section, and at least one of four corners of the outer tube is adjacent to the outer tube. A wide and flat first inclined contact surface extending in the axial direction is formed inside each of the two fitted corner portions, and faces the two corner portions of the outer tube having the first inclined contact surface. Outside the two corners of the inner pipe, a wide flat second oblique contact surface is formed, which also extends in the axial direction, and a vertical or horizontal load is applied to the lifting frame. At this time, the second oblique cutting contact surface corresponds to the Telescopic pipe structure of the lifting frame, characterized in that it is in contact with the pressing state to the first beveled contact surface.
垂直部材と、上下方向に間隔をあけて横架される複数の
横架部材と、前記垂直部材の下端同士を連結する下部連
結管と、上端が前記垂直部材の中途部に揺動自在に枢支
されると共に下端が前記垂直部材の下端面より下方に伸
延して床面上に設置可能な補助垂直部材と、該補助垂直
部材と前記下部連結管間に伸縮自在に介設され、前記補
助垂直部材の横幅方向の張り出し量を規制する張り出し
量調整管とから昇降枠が構成され、前記各補助垂直部材
が内管と外管からなる第１の伸縮管構造を有すると共に
前記下部連結管と前記張り出し量調整管によって内管と
外管からなる第２の伸縮管構造が形成される昇降枠の伸
縮管構造において、 前記内管と外管が共に中空矩形断面を有し、前記外管の
４つのコーナー部のうち少なくとも隣り合う２つのコー
ナー部の内側に、軸線方向に伸延する広幅かつ平坦な第
１の斜切接触面がそれぞれ形成され、前記第１の斜切接
触面を有する前記外管の２つのコーナー部に対峙する前
記内管の２つのコーナー部の外側に、同様に軸線方向に
伸延する広幅の平坦な第２の斜切接触面がそれぞれ形成
され、前記昇降枠に垂直方向又は水平方向の負荷がかか
った際、前記第２の斜切接触面が対応する前記第１の斜
切接触面に押圧状態に当接されることを特徴とする昇降
枠の伸縮管構造。2. A pair of vertical members erected at intervals in the horizontal width direction, a plurality of horizontal members laid horizontally at intervals in a vertical direction, and a lower connection for connecting lower ends of the vertical members. A tube, an auxiliary vertical member whose upper end is pivotally supported on a middle portion of the vertical member and whose lower end extends below the lower end surface of the vertical member and can be installed on a floor surface; An elevating frame is configured from a member and the lower connecting pipe so as to be extendable and contractible, and a protruding amount adjusting pipe for restricting a protruding amount of the auxiliary vertical member in a lateral width direction. A telescopic frame structure of a lifting frame having a first telescopic tube structure comprising a pipe and a second telescopic tube structure comprising an inner pipe and an outer pipe formed by the lower connecting pipe and the overhanging amount adjusting pipe; Wherein both the tube and the outer tube have a hollow rectangular cross-section, A wide and flat first oblique contact surface extending in the axial direction is formed inside at least two adjacent corner portions of the four corner portions, and the outer oblique contact surface having the first oblique contact surface is formed. Outside the two corners of the inner pipe facing the two corners of the pipe, wide flat second oblique cut contact surfaces are also formed, which also extend in the axial direction. Alternatively, when a load in a horizontal direction is applied, the second oblique cutting contact surface is brought into contact with the corresponding first oblique cutting contact surface in a pressed state, and the telescopic tube structure of the elevating frame is characterized in that:
軸線方向に伸延する広幅かつ平坦な第１の斜切接触面が
それぞれ形成され、前記外管の４つのコーナー部に対峙
する前記内管の４つのコーナー部の外側に、同様に軸線
方向に伸延する広幅の平坦な第２の斜切接触面がそれぞ
れ形成され、前記昇降枠に垂直方向又は水平方向の負荷
がかかった際、前記第２の斜切接触面が対応する前記第
１の斜切接触面に押圧状態に当接されることを特徴とす
る請求項１又は２記載の昇降枠の伸縮管構造。3. Inside the four corners of the outer tube,
Wide and flat first oblique contact surfaces extending in the axial direction are respectively formed, and also extend in the axial direction outside the four corners of the inner tube facing the four corners of the outer tube. A wide flat second inclined contact surface is formed, and when a vertical or horizontal load is applied to the lift frame, the second inclined contact surface corresponds to the first inclined cut surface. 3. The telescopic tube structure of a lifting frame according to claim 1, wherein the telescopic tube structure is brought into contact with the contact surface in a pressed state.
垂直部材の上、下端部同士を連結して開口枠が構成さ
れ、前記各垂直部材が内管と外管からなる伸縮管構造と
なっている開口枠の伸縮管構造において、 前記内管と外管が共に中空矩形断面を有し、前記外管の
４つのコーナー部のうち少なくとも隣り合う２つのコー
ナー部の内側に、軸線方向に伸延する広幅かつ平坦な第
１の斜切接触面がそれぞれ形成され、前記第１の斜切接
触面を有する前記外管の２つのコーナー部に対峙する前
記内管の２つのコーナー部の外側に、同様に軸線方向に
伸延する広幅の平坦な第２の斜切接触面がそれぞれ形成
され、前記開口枠に垂直方向又は水平方向の負荷がかか
った際、前記第２の斜切接触面が対応する前記第１の斜
切接触面に押圧状態に当接されることを特徴とする開口
枠の伸縮管構造。4. An opening frame is formed by connecting upper and lower ends of a pair of vertical members erected at intervals in the width direction to form an opening frame, wherein each of the vertical members comprises an inner tube and an outer tube. Wherein the inner pipe and the outer pipe both have a hollow rectangular cross-section, and at least two corners of the four corners of the outer pipe are arranged in the axial direction. A wide and flat first oblique contact surface is formed, and two outer corners of the inner tube facing two corners of the outer tube having the first oblique contact surface. In the same manner, wide flat second inclined contact surfaces extending in the axial direction are respectively formed, and when a vertical or horizontal load is applied to the opening frame, the second inclined contact surface is Pressed against the corresponding first oblique contact surface in a pressed state Telescopic pipe structure of the opening frame, characterized and.
垂直部材と、前記垂直部材の上下端同士を連結する上、
下部連結管と、上端が前記垂直部材の中途部に揺動自在
に枢支されると共に下端が前記垂直部材の下端面より下
方に伸延して床面上に設置可能な補助垂直部材と、該補
助垂直部材と前記下部連結管間に伸縮自在に介設され、
前記補助垂直部材の横幅方向の張り出し量を規制する張
り出し量調整管とから開口枠が構成され、前記各補助垂
直部材が内管と外管からなる第１の伸縮管構造を有する
と共に前記下部連結管と前記張り出し量調整管によって
内管と外管からなる第２の伸縮管構造が形成される開口
枠の伸縮管構造において、 前記内管と外管が共に中空矩形断面を有し、前記外管の
４つのコーナー部のうち少なくとも隣り合う２つのコー
ナー部の内側に、軸線方向に伸延する広幅かつ平坦な第
１の斜切接触面がそれぞれ形成され、前記第１の斜切接
触面を有する前記外管の２つのコーナー部に対峙する前
記内管の２つのコーナー部の外側に、同様に軸線方向に
伸延する広幅の平坦な第２の斜切接触面がそれぞれ形成
され、前記開口枠に垂直方向又は水平方向の負荷がかか
った際、前記第２の斜切接触面が対応する前記第１の斜
切接触面に押圧状態に当接されることを特徴とする開口
枠の伸縮管構造。5. A pair of vertical members erected at intervals in the width direction, and upper and lower ends of the vertical members are connected to each other.
A lower connecting pipe, an auxiliary vertical member whose upper end is pivotally supported on a middle portion of the vertical member and whose lower end extends below the lower end surface of the vertical member and can be installed on the floor surface; Telescopically interposed between the auxiliary vertical member and the lower connecting pipe,
An opening frame is constituted by an extension amount adjusting tube for regulating the extension amount of the auxiliary vertical member in the lateral width direction. Each of the auxiliary vertical members has a first telescopic tube structure including an inner tube and an outer tube, and the lower connection is formed. In a telescopic tube structure of an opening frame in which a second telescopic tube structure including an inner tube and an outer tube is formed by a tube and the overhanging amount adjusting tube, the inner tube and the outer tube both have a hollow rectangular cross section, A wide and flat first inclined contact surface extending in the axial direction is formed inside at least two adjacent corners of the four corners of the pipe, and has the first inclined contact surface. On the outside of the two corners of the inner tube facing the two corners of the outer tube, a wide flat second inclined cutting surface is also formed, which also extends in the axial direction. Vertical or horizontal negative The telescopic tube structure of an opening frame, wherein when a load is applied, the second oblique cutting contact surface is brought into contact with the corresponding first oblique cutting contact surface in a pressed state.
軸線方向に伸延する広幅かつ平坦な第１の斜切接触面が
それぞれ形成され、前記外管の４つのコーナー部に対峙
する前記内管の４つのコーナー部の外側に、同様に軸線
方向に伸延する広幅の平坦な第２の斜切接触面がそれぞ
れ形成され、前記開口枠に垂直方向又は水平方向の負荷
がかかった際、前記第２の斜切接触面が対応する前記第
１の斜切接触面に押圧状態に当接されることを特徴とす
る請求項４又は５記載の開口枠の伸縮管構造。6. Inside the four corners of the outer tube,
Wide and flat first oblique contact surfaces extending in the axial direction are respectively formed, and also extend in the axial direction outside the four corners of the inner tube facing the four corners of the outer tube. A wide, flat second inclined contact surface is formed, and when a vertical or horizontal load is applied to the opening frame, the second inclined contact surface corresponds to the first first inclined contact surface. The telescopic tube structure of an opening frame according to claim 4 or 5, wherein the telescopic tube structure is brought into contact with the contact surface in a pressed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36463097A JP3955669B2 (en) | 1997-12-17 | 1997-12-17 | Telescopic tube structure of lifting frame and opening frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36463097A JP3955669B2 (en) | 1997-12-17 | 1997-12-17 | Telescopic tube structure of lifting frame and opening frame |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11182166A true JPH11182166A (en) | 1999-07-06 |
| JP3955669B2 JP3955669B2 (en) | 2007-08-08 |
Family
ID=18482281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36463097A Expired - Fee Related JP3955669B2 (en) | 1997-12-17 | 1997-12-17 | Telescopic tube structure of lifting frame and opening frame |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3955669B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008285966A (en) * | 2007-05-21 | 2008-11-27 | Kimiyo Nakao | Multi-step ladder |
| FR2928402A1 (en) * | 2008-03-10 | 2009-09-11 | Escalux Soc Par Actions Simpli | Self-locking adjustable leg for supporting e.g. ladder, has straight rod forming small angle with ground such that locking in position of leg is assured by friction of straight rod in sleeve and on ground, and plate fixed at end of rod |
| JP2017036625A (en) * | 2015-08-12 | 2017-02-16 | 長谷川工業株式会社 | Outrigger type leg device |
| KR20210085318A (en) * | 2019-12-30 | 2021-07-08 | 안예원 | A ladder apparatus |
-
1997
- 1997-12-17 JP JP36463097A patent/JP3955669B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008285966A (en) * | 2007-05-21 | 2008-11-27 | Kimiyo Nakao | Multi-step ladder |
| FR2928402A1 (en) * | 2008-03-10 | 2009-09-11 | Escalux Soc Par Actions Simpli | Self-locking adjustable leg for supporting e.g. ladder, has straight rod forming small angle with ground such that locking in position of leg is assured by friction of straight rod in sleeve and on ground, and plate fixed at end of rod |
| JP2017036625A (en) * | 2015-08-12 | 2017-02-16 | 長谷川工業株式会社 | Outrigger type leg device |
| KR20210085318A (en) * | 2019-12-30 | 2021-07-08 | 안예원 | A ladder apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3955669B2 (en) | 2007-08-08 |
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