JP5626938B1

JP5626938B1 - Safety ladder

Info

Publication number: JP5626938B1
Application number: JP2013133014A
Authority: JP
Inventors: 孝雄坪井
Original assignee: 株式会社東洋技研
Priority date: 2013-06-25
Filing date: 2013-06-25
Publication date: 2014-11-19
Anticipated expiration: 2033-06-25
Also published as: JP2015007342A

Abstract

【課題】簡単な構成で、安全に縦支柱と可動支柱（移動ユニット）とを固定可能とし、安全帯を取り付けてから降りることができる安全梯子を提供する。【解決手段】安全梯子１０を、梯子２０と、移動柱３０と一対の右操作柱４０Ａ及び左操作柱４０Ｂを有する移動ユニット５０と、を備える構成とする。右操作柱４０Ａ、左操作柱４０Ｂの下部に、右係合部４１Ａ、左係合部４１Ｂをそれぞれ配設し、右縦支柱２１、左縦支柱２２の上部に、右係合部４１Ａ、左係合部４１Ｂと係合する右被係合部２４Ａ、左被係合部２４Ｂをそれぞれ配設し、右操作柱４０Ａ、左操作柱４０Ｂに、右上支持部３４Ａ、左上支持部３４Ｂの下側に配置されるとともに右上支持部３４Ａ、左上支持部３４Ｂを係止可能に形成された右係止部４２Ａ、左係止部４２Ｂをそれぞれ配設する。【選択図】図２Provided is a safety ladder capable of safely fixing a vertical support and a movable support (moving unit) with a simple configuration and capable of descending after attaching a safety belt. A safety ladder 10 includes a ladder 20, a moving column 30, a moving unit 50 having a pair of right operating column 40A and left operating column 40B. A right engagement portion 41A and a left engagement portion 41B are disposed below the right operation column 40A and the left operation column 40B, respectively, and the right engagement portion 41A and the left engagement portion 41B are disposed above the right vertical column 21 and the left vertical column 22, respectively. A right engaged portion 24A and a left engaged portion 24B that engage with the engaging portion 41B are provided, respectively, and the lower right support portion 34A and the upper left support portion 34B are provided on the right operation column 40A and the left operation column 40B. And a right locking portion 42A and a left locking portion 42B formed to be able to lock the upper right support portion 34A and the upper left support portion 34B, respectively. [Selection] Figure 2

Description

本発明は、構造物に設置される安全梯子に関する。 The present invention relates to a safety ladder installed in a structure.

ＰＣタンク等の比較的大きな構造物の保全、点検時には、構造物の屋根側にある開口部から内周壁に設けられた梯子を使用してタンク内に入って保全、点検作業を行なう。 When maintaining and inspecting relatively large structures such as PC tanks, maintenance and inspection work is performed by entering the tank from the opening on the roof side of the structure using a ladder provided on the inner peripheral wall.

しかし、図１１、１２−１、１２−２に示すように、ＰＣタンク１００等の開口部１０１は、上方に筒状に突出部分が形成され、梯子１０２が配設されている部分までの距離が体半分程度あった。開口部１０１付近には、蓋１０３が設置されるため、安全帯を取り付ける為の設備もなく、手で把持可能な設備もなかった。高所作業の移動時には、安全帯を付けることが義務付けられているが、上述したように、開口部１０１には、安全帯を取り付けられる状態でないので、従来は安全帯を付けたくても付けられなかった。 However, as shown in FIGS. 11, 12-1, and 12-2, the opening 101 of the PC tank 100 or the like is a distance to a portion where a protruding portion is formed in a cylindrical shape above and the ladder 102 is disposed. There was about half the body. Since the lid 103 was installed in the vicinity of the opening 101, there was no equipment for attaching a safety belt and no equipment that could be gripped by hand. Although it is obliged to attach a safety belt when moving at work in high places, as described above, the opening 101 is not in a state where a safety belt can be attached. There wasn't.

そのような状況において、作業者は、図１２−１、１２−２に示すように、開口部１０１の端部を手でつかみながら足で梯子１０２のステップ１０２ａ又はステップ１０２ｂを探るという危険を冒しながら梯子１０２まで降りていくことを余儀なくされ、開口部１０１から梯子１０２に降りる際には、落下するおそれがあった。 In such a situation, as shown in FIGS. 12A and 12B, the operator takes the risk of searching for the step 102a or the step 102b of the ladder 102 with his / her foot while grasping the end of the opening 101 by hand. However, it was forced to descend to the ladder 102, and there was a possibility of falling when descending from the opening 101 to the ladder 102.

これに対し、マンホール内への転落を防止するものであるが、昇降式梯子として特許文献１に記載されるものがあった。これによれば、マンホールの内周壁に上下方向に沿って梯子を取り付け、梯子を構成する一対の縦支柱の上端付近には、複数列の滑車が配設され、複数列の滑車の間に可動支柱が昇降可能に通されていた。 On the other hand, although it is what prevents falling into a manhole, there existed what was described in patent document 1 as a raising / lowering ladder. According to this, a ladder is attached to the inner peripheral wall of the manhole along the vertical direction, and a plurality of rows of pulleys are arranged near the upper ends of the pair of vertical columns constituting the ladder, and are movable between the rows of pulleys. The column was passed up and down.

ワイヤは、一端側においてカウンタウエイトと連結され、縦支柱に配設された支点プーリを経由して配された後、他端側において可動支柱の下端部と連結されている。 The wire is connected to the counterweight on one end side, arranged via a fulcrum pulley disposed on the vertical support, and then connected to the lower end of the movable support on the other end.

そして、縦支柱の上端部に取り付けられた第一ストッパと、可動支柱が最上位の位置にあるとき第一ストッパと対応する位置となる第二ストッパとを、ストッパピンを通して固定することとなっていた。 Then, the first stopper attached to the upper end portion of the vertical support and the second stopper that corresponds to the first stopper when the movable support is at the uppermost position are fixed through the stopper pin. It was.

特開平０９−２７９６１５号公報JP 09-279615 A

上記の安全梯子では、縦支柱と可動支柱とをストッパピンで固定する際には、可動支柱は固定されていない状態で、作業者は縦支柱の上端部まで安全帯をつけずに、降りて行って当該作業することになるので、危険であることに変わりはないという問題があった。 In the above safety ladder, when fixing the vertical strut and the movable strut with the stopper pin, the operator should go down without attaching a safety belt to the upper end of the vertical strut, with the movable strut not fixed. There was a problem that there was no change in being dangerous because the work would be carried out.

また、ワイヤ、支点プーリ、カウンタウエイト等による滑車機構と、可動支柱を昇降させる複数列の滑車と、が必要で、部品点数が多く、機構が複雑となっていた。 Further, a pulley mechanism using a wire, a fulcrum pulley, a counterweight, and the like and a plurality of rows of pulleys for moving the movable column up and down are necessary, and the number of parts is large and the mechanism is complicated.

本発明は、簡単な構成で、人力により安全に縦支柱と可動支柱（移動ユニット）とを固定可能とし、安全帯を取り付けてから降りることができる安全梯子を提供することを目的とする。 It is an object of the present invention to provide a safety ladder that can be secured after a vertical belt and a movable column (moving unit) can be safely secured by human power with a simple configuration and can be lowered after a safety belt is attached.

請求項１記載の発明では、構造物に設置される安全梯子であって、筒状に形成された左右一対の縦支柱と、各縦支柱を連結するステップとを有し構造物に固定される梯子と、梯子側に位置する待機位置と待機位置より上側に引き上げられた引き出し位置との間を移動可能な移動ユニットと、を備え、移動ユニットは、各縦支柱内にそれぞれ摺動可能に配設される左右一対の縦柱と、各縦柱を連結する横柱とを有し、安全帯を取り付け可能な移動柱と、長尺状に形成され、各縦柱に配設された上支持部及び各縦支柱に配設された下支持部に、移動柱及び縦支柱に対して上下方向に沿って移動可能、に支持される一対の操作柱と、を有し、各操作柱の下部には、係合部が配設され、各縦支柱の上部には、各係合部と係合する被係合部が配設され、操作柱には、上支持部の下側に配置されるとともに上支持部を係止可能に形成された係止部が配設され、各操作柱が引き上げられて、同じ側に位置する、操作柱の前記係合部と縦支柱の被係合部とが係合されることにより、各操作柱が前記縦支柱に対して下側に移動することが規制されるとともに、同じ側に位置する、上支持部が係止部に係止されることにより、移動柱が各操作柱に対して下側に移動することが規制され、移動ユニットが前記引き出し位置に保持される。 The invention according to claim 1 is a safety ladder installed in a structure, and has a pair of left and right vertical struts formed in a cylindrical shape and a step of connecting the vertical struts and is fixed to the structure. A ladder, and a moving unit movable between a standby position located on the ladder side and a pulling position pulled up above the standby position, and the moving unit is slidably arranged in each vertical column. It has a pair of left and right vertical columns and a horizontal column that connects each vertical column, a movable column to which a safety belt can be attached, and an upper support that is formed in a long shape and disposed on each vertical column And a pair of operation columns supported to be movable in the vertical direction with respect to the moving column and the vertical column, and a lower portion of each operation column. Is provided with an engaging portion, and an upper portion of each vertical column is provided with an engaged portion that engages with each engaging portion. The column is arranged on the lower side of the upper support part and is provided with a locking part formed to be able to lock the upper support part, and each operation column is pulled up and positioned on the same side. When the engaging portion of the column and the engaged portion of the vertical column are engaged, the operation columns are restricted from moving downward with respect to the vertical column and are positioned on the same side. When the upper support portion is locked to the locking portion, the movement column is restricted from moving downward with respect to each operation column, and the movement unit is held at the pull-out position.

これによれば、同じ側に位置する、操作柱の係合部と、縦支柱の被係合部とを係合させて、各操作柱が下側に移動するのを規制し、同じ側に位置する、操作柱に配設された係止部が上支持部を係止して、移動柱が下側に移動するのを規制して、移動ユニットを引き出し位置に保持するので、簡単な構成で移動ユニットを縦支柱に対して固定可能とすることができる。 According to this, by engaging the engaging portion of the operation column and the engaged portion of the vertical column, which are located on the same side, the movement of each operation column is restricted to the lower side, The locking unit located on the operation column is positioned to lock the upper support unit, restricting the moving column from moving downward, and holding the moving unit in the pull-out position. The mobile unit can be fixed to the vertical support.

また、各操作柱を持って引き上げると、各操作柱に配設された係止部が、各移動柱に配設された上支持部と係止して、移動ユニット全体を引き上げることとになり、そのときに各操作柱を操作して、操作柱の係合部と、縦支柱の被係合部とを係合させて、引き出し位置に保持された移動柱に安全帯を取り付けてから梯子に降りることができる。 In addition, when each operation column is held up, the locking portion disposed on each operation column is locked with the upper support portion disposed on each moving column, and the entire moving unit is pulled up. Then, by operating each operation column at that time, engage the engagement portion of the operation column and the engaged portion of the vertical column, and attach the safety belt to the moving column held at the pulling position, and then the ladder You can get off.

また、梯子に降りる際に引き出した移動柱を手でつかむことができるので安全性を高めることができる。 Moreover, since the moving pillar pulled out when getting down to a ladder can be grasped by hand, safety can be improved.

また、係合、係止部分がそれぞれ二か所となるので、移動ユニットの固定状態の安定性を向上させることができる。 In addition, since there are two engaging and locking portions, the stability of the fixed state of the moving unit can be improved.

なお、ここで「構造物」とは、複数の材料や部材などにより構成され、基礎などにより重量を支えられた構造により造作されたものをいう。 Here, the “structure” refers to a structure made of a plurality of materials, members, and the like and having a structure in which the weight is supported by a foundation or the like.

また、被係合部を、平面視においてステップに対して斜め方向に延設されるとともに、操作柱から外れた位置とすれば、操作柱を上下方向に移動させたときに、被係合部が係合部と干渉することを抑制することができる。 In addition, if the engaged portion is extended in an oblique direction with respect to the step in plan view and is positioned away from the operation column, the engaged portion is moved when the operation column is moved in the vertical direction. Can be prevented from interfering with the engaging portion.

また、操作柱を、上支持部及び下支持部に、上下方向を軸として回動可能に支持され、操作柱の上端部に、ハンドルを配設し、平面視において、係合部がハンドルと同一の方向に延びるように形成し、係合部を回動させることにより、被係合部と係合する構成とすれば、ハンドルの回動動作と係合部の動作が平面視において同じになるため、操作柱の係合部と縦支柱の被係合部との係合作業を容易にすることができる。 The operation column is supported by the upper support portion and the lower support portion so as to be rotatable about the vertical direction. A handle is disposed at the upper end portion of the operation column. If it is formed to extend in the same direction and the engaging portion is rotated to engage with the engaged portion, the turning operation of the handle and the operation of the engaging portion are the same in plan view. Therefore, the engagement work of the engaging part of the operation column and the engaged part of the vertical column can be facilitated.

本発明の一実施形態の安全梯子を示す正面図である。It is a front view which shows the safety ladder of one Embodiment of this invention. 同実施形態の安全梯子の移動ユニットを引き上げた状態を示す正面図である。It is a front view which shows the state which pulled up the moving unit of the safety ladder of the embodiment. 同実施形態の安全梯子を示す平面図である。It is a top view which shows the safety ladder of the embodiment. 同実施形態の移動ユニットが待機位置にあるときの部分拡大正面図である。It is a partial enlarged front view when the movement unit of the embodiment is in a standby position. 同実施形態の移動ユニットが引き出し位置にあるときの部分拡大正面図である。It is a partial expanded front view when the movement unit of the embodiment exists in a drawer position. 同実施形態の動作状態を示す部分拡大図である。It is the elements on larger scale which show the operation state of the embodiment. 同実施形態の動作状態を示す部分拡大平面図である。It is a partial enlarged plan view which shows the operation state of the embodiment. 移動ユニットを待機位置から引き出し位置に引き出す際の使用状態を示す側面図である。It is a side view which shows the use condition at the time of pulling out a moving unit from a stand-by position to a drawer position. 移動ユニットを待機位置から引き出し位置に引き出す際の使用状態を示す側面図である。It is a side view which shows the use condition at the time of pulling out a moving unit from a stand-by position to a drawer position. 引き出し位置において移動柱に安全帯を取り付けた状態を示す正面図である。It is a front view which shows the state which attached the safety belt to the movement pillar in the drawer position. 引き出し位置において移動柱に安全帯を取り付けた状態を示す側面図である。It is a side view which shows the state which attached the safety belt to the movement pillar in the drawer position. 同実施形態の安全梯子の作業者が降りる状態を示す側面図である。It is a side view showing the state where the worker of the safety ladder of the embodiment gets off. 同実施形態の安全梯子の作業者が降りる状態を示す側面図である。It is a side view showing the state where the worker of the safety ladder of the embodiment gets off. 従来の構造物における梯子の設置状態の概略図である。It is the schematic of the installation state of the ladder in the conventional structure. 従来の構造物における梯子の作業者が降りる状態を示す側面図である。It is a side view which shows the state in which the worker of the ladder in the conventional structure gets down. 従来の構造物における梯子の作業者が降りる状態を示す側面図である。It is a side view which shows the state in which the worker of the ladder in the conventional structure gets down.

本発明の安全梯子の一実施形態を図面に基づいて説明する。以下の説明では、各図面の矢印の、Ｆを前、ＲＥを後ろ、Ｒを右、Ｌを左、Ｕを上、Ｄを下、とする。なお、説明をしやすくするため、図３においては、右下支持部２５Ａ、左下支持部２５Ｂ、右上支持部３４Ａ、左上支持部３４Ｂ、右上補助支持部３５Ａ、左上補助支持部３５Ｂ、を二点鎖線で示している。 An embodiment of a safety ladder according to the present invention will be described with reference to the drawings. In the following description, in the arrows of each drawing, F is front, RE is back, R is right, L is left, U is up, and D is down. For ease of explanation, in FIG. 3, the lower right support portion 25A, the lower left support portion 25B, the upper right support portion 34A, the upper left support portion 34B, the upper right auxiliary support portion 35A, and the upper left auxiliary support portion 35B are two points. Shown with a chain line.

安全梯子１０は、概略的には、図８−１〜１０−２に示すように、梯子２０と、移動柱３０と操作柱４０とを有する移動ユニット５０と、を備え、移動ユニット５０を梯子２０に対して固定可能とし、移動柱３０に安全帯Ｂを取り付けてから、梯子２０に降りることを可能とし、構造物内に進入時の安全を確保するものである。 As schematically shown in FIGS. 8-1 to 10-2, the safety ladder 10 includes a ladder 20, a moving unit 50 having a moving column 30 and an operation column 40, and the moving unit 50 is included in the ladder. 20 can be fixed, and the safety belt B can be attached to the movable column 30 and then the ladder 20 can be descended to ensure safety when entering the structure.

梯子２０は、図１〜５に示すように、構造物に取り付けられた状態で、上下方向に沿って延びる、右縦支柱２１及び左縦支柱２２と、左右方向に沿って延びて、右縦支柱２１と左縦支柱２２とを連結する複数のステップ２３（２３ａ、２３ｂ、２３ｃ、２３ｄ、２３ｅ、２３ｆ）と、を有している。 As shown in FIGS. 1 to 5, the ladder 20 is attached to the structure, and extends along the vertical direction, the right vertical column 21 and the left vertical column 22, and extends along the horizontal direction. A plurality of steps 23 (23a, 23b, 23c, 23d, 23e, 23f) for connecting the column 21 and the left vertical column 22;

右縦支柱２１及び左縦支柱２２は、円筒状で、後述する右縦柱３１、左縦柱３２を、内側で上下方向に沿って摺動可能にそれぞれ形成されている。 The right vertical column 21 and the left vertical column 22 are cylindrical, and are formed so that a right vertical column 31 and a left vertical column 32, which will be described later, can be slid along the vertical direction inside.

右縦支柱２１及び左縦支柱２２の上部には、後述する右係合部４１Ａ、左係合部４１Ｂと係合する右被係合部２４Ａ、左被係合部２４Ｂがそれぞれ配設されている。 On the upper part of the right vertical column 21 and the left vertical column 22, a right engaged portion 41A and a right engaged portion 24A that engage with the left engaged portion 41B, which will be described later, and a left engaged portion 24B are disposed, respectively. Yes.

右被係合部２４Ａ、左被係合部２４Ｂは、円柱状に形成され、上下方向に直交する方向に沿って延び、かつ、平面視において、図３に示すように、ステップ２３に対して斜め方向に延設されるとともに、右操作柱４０Ａ、左操作柱４０Ｂから外れた位置となるように配設されている。本実施形態では、ステップ２３に対して、右被係合部２４Ａは右後側に、左被係合部２４Ｂは左後側に、４５度斜めに延設させている。 The right engaged portion 24A and the left engaged portion 24B are formed in a columnar shape, extend along a direction orthogonal to the vertical direction, and in plan view, as shown in FIG. It extends in an oblique direction, and is disposed so as to be positioned away from the right operation column 40A and the left operation column 40B. In the present embodiment, with respect to step 23, the right engaged portion 24A extends to the right rear side, and the left engaged portion 24B extends obliquely by 45 degrees to the left rear side.

右縦支柱２１及び左縦支柱２２の上部には、矩形平板状に形成された右下支持部２５Ａ、左下支持部２５Ｂがそれぞれ配設されている。右下支持部２５Ａ、左下支持部２５Ｂには、後述する右操作柱４０Ａ、左操作柱４０Ｂを上下方向に沿って挿通可能な図示しない挿通孔がそれぞれ形成されている。 On the upper part of the right vertical column 21 and the left vertical column 22, a lower right support part 25A and a lower left support part 25B formed in a rectangular flat plate shape are respectively arranged. The lower right support part 25A and the lower left support part 25B are formed with insertion holes (not shown) through which a right operation column 40A and a left operation column 40B described later can be inserted in the vertical direction.

右縦支柱２１及び左縦支柱２２は、固定部材２６を介して構造物の壁面Ｆに固定されている。 The right vertical column 21 and the left vertical column 22 are fixed to the wall surface F of the structure via a fixing member 26.

移動柱３０は、図１〜５に示すように、右縦支柱２１内を摺動可能に形成された右縦柱３１と、左縦支柱２２内を摺動可能に形成された左縦柱３２と、右縦柱３１及び左縦柱３２の上端部どうしを連結する横柱３３と、を有し、正面視において、略コの字状に形成されている。 As shown in FIGS. 1 to 5, the movable column 30 includes a right vertical column 31 that is slidable in the right vertical column 21 and a left vertical column 32 that is slidable in the left vertical column 22. And a horizontal column 33 that connects the upper ends of the right vertical column 31 and the left vertical column 32, and is formed in a substantially U-shape when viewed from the front.

右縦柱３１及び左縦柱３２の上部には、矩形平板状に形成された右上支持部３４Ａ、左上支持部３４Ｂがそれぞれ配設されている。 Above the right vertical column 31 and the left vertical column 32, a right upper support portion 34A and an upper left support portion 34B formed in a rectangular flat plate shape are respectively disposed.

右上支持部３４Ａ、左上支持部３４Ｂには、後述する右操作柱４０Ａ、左操作柱４０Ｂを上下方向に沿って挿通可能な図示しない挿通孔がそれぞれ形成されている。 The upper right support portion 34A and the upper left support portion 34B are formed with insertion holes (not shown) through which a right operation column 40A and a left operation column 40B described later can be inserted along the vertical direction.

右上支持部３４Ａ、左上支持部３４Ｂの下側には、矩形平板状に形成された右上補助支持部３５Ａ、左上補助支持部３５Ｂがそれぞれ配設されている。 Below the upper right support portion 34A and the upper left support portion 34B, an upper right auxiliary support portion 35A and an upper left auxiliary support portion 35B formed in a rectangular flat plate shape are respectively disposed.

右上補助支持部３５Ａ、左上補助支持部３５Ｂには、後述する右操作柱４０Ａ、左操作柱４０Ｂを上下方向に沿って挿通可能な図示しない挿通孔がそれぞれ形成されている。 The upper right auxiliary support portion 35A and the upper left auxiliary support portion 35B are formed with insertion holes (not shown) through which a later-described right operation column 40A and left operation column 40B can be inserted in the vertical direction.

右縦柱３１は右縦支柱２１内に挿入され、左縦柱３２は左縦支柱２２内に挿入され、移動ユニット５０が、梯子２０側に位置する待機位置と、待機位置より上側に引き上げられた引き出し位置との間を移動可能とされている。 The right vertical column 31 is inserted into the right vertical column 21, the left vertical column 32 is inserted into the left vertical column 22, and the moving unit 50 is pulled up to the standby position located on the ladder 20 side and above the standby position. It is possible to move between the drawer positions.

操作柱４０、４０は、図１〜７に示すように、上下方向に延びる円筒状に形成され、右側に設けられた操作柱４０を右操作柱４０Ａ、左側に設けられた操作柱４０を左操作柱４０Ｂ、と表記する。 1 to 7, the operation columns 40 and 40 are formed in a cylindrical shape extending in the vertical direction, the operation column 40 provided on the right side is the right operation column 40A, and the operation column 40 provided on the left side is the left. This is represented as an operation column 40B.

右操作柱４０Ａは、右縦柱３１に配設された右上支持部３４Ａ、右上補助支持部３５Ａ及び右縦支柱２１に配設された右下支持部２５Ａに、上下方向を軸として回動可能、かつ、右縦柱３１及び右縦支柱２１に対して上下方向に沿って移動可能に支持されている。 The right operation column 40A is rotatable about the vertical direction to the upper right support portion 34A, the upper right auxiliary support portion 35A disposed on the right vertical column 31, and the lower right support portion 25A disposed on the right vertical column 21. And, it is supported so as to be movable along the vertical direction with respect to the right vertical column 31 and the right vertical column 21.

左操作柱４０Ｂは、左縦柱３２に配設された左上支持部３４Ｂ、左上補助支持部３５Ｂ及び左縦支柱２２に配設された左下支持部２５Ｂに、上下方向を軸として回動可能、かつ、左縦柱３２及び左縦支柱２２に対して上下方向に沿って移動可能に支持されている。 The left operation column 40B can be rotated around the vertical direction to the upper left support portion 34B disposed on the left vertical column 32, the upper left auxiliary support portion 35B, and the lower left support portion 25B disposed on the left vertical column 22. In addition, the left vertical column 32 and the left vertical column 22 are supported so as to be movable in the vertical direction.

右操作柱４０Ａ及び左操作柱４０Ｂの下部には、右係合部４１Ａ、左係合部４１Ｂがそれぞれ配設されている。 A right engagement portion 41A and a left engagement portion 41B are disposed below the right operation column 40A and the left operation column 40B, respectively.

右係合部４１Ａ、左係合部４１Ｂは、平板状の部材で、右操作柱４０Ａ、左操作柱４０Ｂの径方向外側にそれぞれ延びて形成される平板４１Ａａ、４１Ｂａと、平板４１Ａａ、４１Ｂａの自由端側の下面にそれぞれ配設される一対の止め板４１Ａｂ、４１Ｂｂと、を有して、図１、２の状態において、自由端部分が縦断面略コの字状に形成されている。 The right engaging portion 41A and the left engaging portion 41B are flat members, and are formed by extending flat plates 41Aa and 41Ba and flat plates 41Aa and 41Ba that extend outward in the radial direction of the right operating column 40A and the left operating column 40B, respectively. In the state of FIGS. 1 and 2, the free end portion is formed in a substantially U-shape in vertical section. The pair of stop plates 41 </ b> Ab and 41 </ b> Bb are disposed on the lower surface on the free end side.

平板４１Ａａと一対の止め板４１Ａｂ、４１Ａｂとで形成される縦断面略コの字状の部分の内面がコの字部４１Ａｃとされ、平板４１Ｂａと、一対の止め板４１Ｂｂ、４１Ｂｂとで形成される縦断面略コの字状の内面がコの字部４１Ｂｃとされ、コの字部４１Ａｃ、４１Ｂｃは、円柱状に形成された右被係合部２４Ａ、左被係合部２４Ｂと、それぞれ係合可能に形成されている。 An inner surface of a substantially U-shaped portion formed by the flat plate 41Aa and the pair of stop plates 41Ab and 41Ab is a U-shaped portion 41Ac, and is formed by the flat plate 41Ba and the pair of stop plates 41Bb and 41Bb. The inner surface of the substantially U-shaped longitudinal section is a U-shaped portion 41Bc, and the U-shaped portions 41Ac and 41Bc are respectively formed into a right engaged portion 24A and a left engaged portion 24B formed in a columnar shape. It is formed to be engageable.

右操作柱４０Ａと、左操作柱４０Ｂには、円盤状の右係止部４２Ａ、左係止部４２Ｂが配設されている。右係止部４２Ａ、左係止部４２Ｂの上面は、右上支持部３４Ａ、左上支持部３４Ｂの下面と接して、移動柱３０が右操作柱４０Ａと、左操作柱４０Ｂに対して下側に移動するのを規制する。 The right operation column 40A and the left operation column 40B are provided with disc-shaped right locking portions 42A and left locking portions 42B. The upper surfaces of the right locking portion 42A and the left locking portion 42B are in contact with the lower surfaces of the upper right support portion 34A and the upper left support portion 34B, so that the moving column 30 is below the right operation column 40A and the left operation column 40B. Restrict movement.

右操作柱４０Ａ及び左操作柱４０Ｂの上端部には、右ハンドル４３Ａ、左ハンドル４３Ｂがそれぞれ配設されている。 A right handle 43A and a left handle 43B are provided at the upper ends of the right operation column 40A and the left operation column 40B, respectively.

右ハンドル４３Ａ、左ハンドル４３Ｂは、それぞれ右操作柱４０Ａ、左操作柱４０Ｂの径方向外側に延び、平面視において、右係合部４１Ａ、左係合部４１Ｂと同一の方向に延びるように形成されている。 The right handle 43A and the left handle 43B extend outward in the radial direction of the right operation column 40A and the left operation column 40B, respectively, and are formed to extend in the same direction as the right engagement portion 41A and the left engagement portion 41B in plan view. Has been.

本発明の安全梯子１０の使用態様及び作用機能を説明する。 The usage mode and function of the safety ladder 10 of the present invention will be described.

図４、８−１に示した、移動ユニット５０が梯子２０側に位置する待機位置の状態から、右操作柱４０Ａ及び左操作柱４０Ｂの、右ハンドル４３Ａ、左ハンドル４３Ｂを手でつかみ、上側に引き上げる。このとき、図５、８−２に示すように、右係止部４２Ａ、左係止部４２Ｂにより、右上支持部３４Ａ、左上支持部３４Ｂがそれぞれ係止されるので、右操作柱４０Ａ及び左操作柱４０Ｂを引き上げると、移動ユニット５０全体が引き上げられることになる。 From the state of the standby position where the moving unit 50 is located on the ladder 20 side shown in FIGS. 4 and 8-1, the right handle 43A and the left handle 43B of the right operation column 40A and the left operation column 40B are grasped by hand, and the upper side Pull up. At this time, as shown in FIGS. 5 and 8-2, the upper right support portion 34A and the upper left support portion 34B are locked by the right locking portion 42A and the left locking portion 42B, respectively. When the operation column 40B is pulled up, the entire moving unit 50 is pulled up.

図３、５、６、７に示すように、右ハンドル４３Ａ、左ハンドル４３Ｂを回転させて、右係合部４１Ａのコの字部４１Ａｃを右被係合部２４Ａに、左係合部４１Ｂのコの字部４１Ｂｃを左被係合部２４Ｂに、係合させる。右ハンドル４３Ａと右係合部４１Ａ、左ハンドル４３Ｂと左係合部４１Ｂ、は、平面視において、同一の方向に延びるように形成されているので、右係合部４１Ａ、左係合部４１Ｂは、右ハンドル４３Ａ、左ハンドル４３Ｂとそれぞれ同様に回転し、係合作業を容易にすることになる。 As shown in FIGS. 3, 5, 6, and 7, the right handle 43A and the left handle 43B are rotated so that the U-shaped portion 41Ac of the right engagement portion 41A becomes the right engaged portion 24A and the left engagement portion 41B. The U-shaped portion 41Bc is engaged with the left engaged portion 24B. Since the right handle 43A and the right engagement portion 41A, and the left handle 43B and the left engagement portion 41B are formed to extend in the same direction in plan view, the right engagement portion 41A and the left engagement portion 41B are formed. Are rotated in the same manner as the right handle 43A and the left handle 43B, respectively, to facilitate the engaging operation.

右被係合部２４Ａ、左被係合部２４Ｂは、平面視において、ステップ２３に対して４５度斜めに延設させているので、右ハンドル４３Ａ、左ハンドル４３Ｂを左右方向に沿って配置しておけば、右ハンドル４３Ａ、左ハンドル４３Ｂの操作は、４５度又は１３５度の回転で済むことになる。 Since the right engaged portion 24A and the left engaged portion 24B extend obliquely by 45 degrees with respect to the step 23 in plan view, the right handle 43A and the left handle 43B are disposed along the left-right direction. In this case, the operation of the right handle 43A and the left handle 43B only needs to be rotated by 45 degrees or 135 degrees.

右係合部４１Ａ、左係合部４１Ｂを、右被係合部２４Ａ、左被係合部２４Ｂにそれぞれ係合させると、右操作柱４０Ａ及び左操作柱４０Ｂが右縦支柱２１及び左縦支柱２２に対して下側に移動することが規制される。 When the right engaging portion 41A and the left engaging portion 41B are engaged with the right engaged portion 24A and the left engaged portion 24B, respectively, the right operating column 40A and the left operating column 40B become the right vertical column 21 and the left vertical column. Movement to the lower side with respect to the column 22 is restricted.

同じ側に位置する、右係止部４２Ａが右上支持部３４Ａを、左係止部４２Ｂが左上支持部３４Ｂを、それぞれ係止することにより、移動柱３０が右操作柱４０Ａ及び左操作柱４０Ｂに対して下側に移動することが規制されて、移動ユニット５０を引き出し位置に保持することになる。 The right locking portion 42A and the left locking portion 42B lock the right upper support portion 34A and the left upper support portion 34B, respectively, which are located on the same side, whereby the moving column 30 is moved to the right operation column 40A and the left operation column 40B. Therefore, the movement unit 50 is held in the pull-out position.

図９−１、９−２に示すように、移動柱３０の横柱３３に安全帯Ｂを掛止して、ステップ２３ａに足を乗せて安全を確保してから、梯子２０まで降りることが可能となる。 As shown in FIGS. 9A and 9B, the safety belt B is hooked on the horizontal column 33 of the moving column 30, the foot is put on the step 23 a to ensure safety, and then the ladder 20 can be lowered. It becomes possible.

図１０−１、１０−２に示すように、安全帯Ｂを横柱３３からステップ２３ａに掛け直して、手で、右縦柱３１又は／及び左縦柱３２をつかんで、安全に、さらに下降することが可能となる。 As shown in FIGS. 10-1 and 10-2, the safety belt B is re-hanged from the horizontal column 33 to the step 23a, and the right vertical column 31 and / or the left vertical column 32 are grasped by hand to further safely. It is possible to descend.

一方、移動ユニット５０を待機位置に戻すときは、右ハンドル４３Ａ、左ハンドル４３Ｂを回転させて、右係合部４１Ａのコの字部４１Ａｃと右被係合部２４Ａ、左係合部４１Ｂのコの字部４１Ｂｃと左被係合部２４Ｂ、との係合を解除させる。右ハンドル４３Ａ、左ハンドル４３Ｂを手でつかみ、右操作柱４０Ａ及び左操作柱４０Ｂを下降させる。このとき、引き上げ時と同様に、右上支持部３４Ａが右係止部４２Ａに、左上支持部３４Ｂが左係止部４２Ｂに、それぞれ係止されるので、右操作柱４０Ａ及び左操作柱４０Ｂを下降させると、移動ユニット５０全体が下降していくことになる。そして、図４に示すように、右上補助支持部３５Ａ、左上補助支持部３５Ｂが右縦支柱２１及び左縦支柱２２の上端面にそれぞれ当接して、移動ユニット５０の下降がストップし、待機位置において保持される。 On the other hand, when returning the moving unit 50 to the standby position, the right handle 43A and the left handle 43B are rotated so that the U-shaped portion 41Ac of the right engaging portion 41A, the right engaged portion 24A, and the left engaging portion 41B The engagement between the U-shaped portion 41Bc and the left engaged portion 24B is released. The right handle 43A and the left handle 43B are grasped by hand, and the right operation column 40A and the left operation column 40B are lowered. At this time, the upper right support portion 34A is locked to the right locking portion 42A and the upper left support portion 34B is locked to the left locking portion 42B, respectively, so that the right operation column 40A and the left operation column 40B are When lowered, the entire moving unit 50 is lowered. Then, as shown in FIG. 4, the upper right auxiliary support portion 35A and the upper left auxiliary support portion 35B come into contact with the upper end surfaces of the right vertical column 21 and the left vertical column 22, respectively, and the lowering of the moving unit 50 is stopped, and the standby position Held in.

上記構成の安全梯子１０では、構造物に設置される安全梯子であって、筒状に形成された左右一対の右縦支柱２１及び左縦支柱２２と、右縦支柱２１及び左縦支柱２２を連結するステップ２３を有し構造物に固定される梯子２０と、梯子２０側に位置する待機位置と待機位置より上側に引き上げられた引き出し位置との間を移動可能な移動ユニット５０と、を備え、移動ユニット５０は、右縦支柱２１及び左縦支柱２２内にそれぞれ摺動可能に配設される左右一対の右縦柱３１及び左縦柱３２と、右縦柱３１及び左縦柱３２を連結する横柱３３を有して略コの字状に形成され、安全帯Ｂを取り付け可能な移動柱３０と、長尺状に形成され、右縦柱３１及び左縦柱３２にそれぞれ配設された右上支持部３４Ａ、左上支持部３４Ｂ及び右縦支柱２１、左縦支柱２２にそれぞれ配設された右下支持部２５Ａ、左下支持部２５Ｂに、移動柱３０及び右縦支柱２１、左縦支柱２２に対して上下方向に沿って移動可能、に支持される一対の右操作柱４０Ａ及び左操作柱４０Ｂと、を有し、右操作柱４０Ａ、左操作柱４０Ｂの下部には、右係合部４１Ａ、左係合部４１Ｂがそれぞれ配設され、右縦支柱２１、左縦支柱２２の上部には、右係合部４１Ａ、左係合部４１Ｂと係合する右被係合部２４Ａ、左被係合部２４Ｂがそれぞれ配設され、右操作柱４０Ａ、左操作柱４０Ｂには、右上支持部３４Ａ、左上支持部３４Ｂの下側に配置されるとともに右上支持部３４Ａ、左上支持部３４Ｂを係止可能に形成された右係止部４２Ａ、左係止部４２Ｂがそれぞれ配設され、右操作柱４０Ａ及び左操作柱４０Ｂが引き上げられて、同じ側に位置する、右操作柱４０Ａ、左操作柱４０Ｂの右係合部４１Ａと右被係合部２４Ａ、左係合部４１Ｂと左被係合部２４Ｂ、とが係合されることにより、右操作柱４０Ａ、左操作柱４０Ｂが右縦支柱２１、左縦支柱２２に対して下側に移動することが規制されるとともに、同じ側に位置する、右上支持部３４Ａが右係止部４２Ａに、左上支持部３４Ｂが左係止部４２Ｂに、係止されることにより、移動柱３０が右操作柱４０Ａと、左操作柱４０Ｂに対して下側に移動することが規制され、移動ユニット５０が引き出し位置に保持される。 The safety ladder 10 configured as described above is a safety ladder installed in a structure, and includes a pair of right and left right columns 21 and 22 and a right column 21 and left column 22 formed in a cylindrical shape. A ladder 20 having a connecting step 23 and fixed to the structure; and a moving unit 50 movable between a standby position located on the ladder 20 side and a pull-out position pulled up above the standby position. The moving unit 50 includes a pair of left and right right vertical columns 31 and 32, and a right vertical column 31 and a left vertical column 32, which are slidably disposed in the right vertical column 21 and the left vertical column 22, respectively. It has a horizontal column 33 to be connected, is formed in a substantially U-shape, can be attached to a movable column 30 to which a safety belt B can be attached, and is formed in a long shape, and is disposed on each of the right vertical column 31 and the left vertical column 32 The upper right support portion 34A, the upper left support portion 34B, and the right vertical support 2 The lower right support portion 25A and the lower left support portion 25B respectively disposed on the left vertical column 22 are supported so as to be movable in the vertical direction with respect to the moving column 30, the right vertical column 21, and the left vertical column 22. A right operation column 40A and a left operation column 40B. A right engagement portion 41A and a left engagement portion 41B are respectively disposed below the right operation column 40A and the left operation column 40B. A right engaged portion 24A and a left engaged portion 24B that engage with the right engaging portion 41A and the left engaging portion 41B are disposed on the upper portions of the vertical support column 21 and the left vertical support column 22, respectively. 40A and the left operation column 40B are disposed below the upper right support part 34A and the upper left support part 34B, and are formed with a right lock part 42A that can lock the upper right support part 34A and the upper left support part 34B. The locking portions 42B are respectively arranged, and the right operation column 40A and the left operation column 40 are arranged. Are pulled up and the right engaging column 41A and the right engaged portion 24A of the left operating column 40B and the left engaged portion 41B and the left engaged portion 24B are located on the same side. As a result, the right operation column 40A and the left operation column 40B are restricted from moving downward with respect to the right vertical column 21 and the left vertical column 22, and the upper right support portion 34A is located on the same side. Is locked to the right locking portion 42A and the upper left support portion 34B is locked to the left locking portion 42B, so that the moving column 30 moves downward relative to the right operating column 40A and the left operating column 40B. Is restricted, and the moving unit 50 is held in the drawer position.

これによれば、右係合部４１Ａと右被係合部２４Ａ、左係合部４１Ｂと左被係合部２４Ｂ、とを係合させて、右操作柱４０Ａ、左操作柱４０Ｂが下側に移動するのを規制し、右操作柱４０Ａ、左操作柱４０Ｂに配設された右係止部４２Ａ、左係止部４２Ｂが右上支持部３４Ａ、左上支持部３４Ｂを係止して、移動柱３０が下側に移動するのを規制して、移動ユニット５０を引き出し位置に保持するので、簡単な構成で移動ユニット５０を右縦支柱２１及び左縦支柱２２に対して固定可能とすることができる。 According to this, the right engaging portion 41A and the right engaged portion 24A, the left engaging portion 41B and the left engaged portion 24B are engaged, and the right operating column 40A and the left operating column 40B are on the lower side. To the right operation column 40A and the left operation column 40B, the right engagement portion 42A and the left engagement portion 42B are engaged with the upper right support portion 34A and the upper left support portion 34B. Since the movement of the column 30 is restricted and the moving unit 50 is held in the pull-out position, the moving unit 50 can be fixed to the right vertical column 21 and the left vertical column 22 with a simple configuration. Can do.

また、右操作柱４０Ａ及び左操作柱４０Ｂを持って引き上げると、右操作柱４０Ａ及び左操作柱４０Ｂに配設された右係止部４２Ａ、左係止部４２Ｂが、移動柱３０に配設された右上支持部３４Ａ、左上支持部３４Ｂと係止して、移動ユニット５０全体を引き上げることとになり、そのときに右操作柱４０Ａ及び左操作柱４０Ｂを操作して、右係合部４１Ａ、左係合部４１Ｂと、右被係合部２４Ａ、左被係合部２４Ｂとを係合させて、引き出し位置に保持された移動柱３０に安全帯Ｂを取り付けてから梯子２０に降りることができる。 When the right operation column 40A and the left operation column 40B are pulled up, the right locking portion 42A and the left locking portion 42B disposed on the right operation column 40A and the left operation column 40B are disposed on the moving column 30. The upper right support portion 34A and the upper left support portion 34B are engaged with each other and the entire moving unit 50 is pulled up. At that time, the right operation column 40A and the left operation column 40B are operated, and the right engagement portion 41A is operated. Then, the left engaging portion 41B, the right engaged portion 24A, and the left engaged portion 24B are engaged, and the safety belt B is attached to the moving column 30 held at the pulling position, and then the ladder 20 is lowered. Can do.

また、係合、係止部分がそれぞれ二か所となるので、移動ユニット５０の固定状態の安定性を向上させることができる。 Moreover, since there are two engaging and locking portions, the stability of the moving unit 50 in the fixed state can be improved.

また、右被係合部２４Ａ、左被係合部２４Ｂを、平面視においてステップ２３に対して斜め方向に延設されるとともに、右操作柱４０Ａ、左操作柱４０Ｂから外れた位置としているので、右操作柱４０Ａ、左操作柱４０Ｂを上下方向に移動させたときに、右被係合部２４Ａ、左被係合部２４Ｂが、右係合部４１Ａ、左係合部４１Ｂと干渉することを抑制することができる。 Further, the right engaged portion 24A and the left engaged portion 24B extend obliquely with respect to the step 23 in plan view, and are positioned away from the right operation column 40A and the left operation column 40B. When the right operation column 40A and the left operation column 40B are moved in the vertical direction, the right engaged portion 24A and the left engaged portion 24B interfere with the right engaged portion 41A and the left engaged portion 41B. Can be suppressed.

また、右操作柱４０Ａを、右上支持部３４Ａ及び右下支持部２５Ａにより、左操作柱４０Ｂを、左上支持部３４Ｂ及び左下支持部２５Ｂにより、上下方向を軸として回動可能に支持し、右操作柱４０Ａと、左操作柱４０Ｂの上端部に、右ハンドル４３Ａ、左ハンドル４３Ｂを配設し、平面視において、右係合部４１Ａ、左係合部４１Ｂが右ハンドル４３Ａ、左ハンドル４３Ｂと同一の方向に延びる構成としているので、右ハンドル４３Ａ、左ハンドル４３Ｂの回動動作と、右係合部４１Ａ、左係合部４１Ｂの動作が平面視において同じになるため、右係合部４１Ａ、左係合部４１Ｂと右被係合部２４Ａ、左被係合部２４Ｂとの係合作業を容易にすることができる。 Further, the right operation column 40A is supported by the upper right support portion 34A and the lower right support portion 25A, and the left operation column 40B is supported by the upper left support portion 34B and the lower left support portion 25B so as to be rotatable about the vertical direction. A right handle 43A and a left handle 43B are disposed at the upper ends of the operation column 40A and the left operation column 40B, and in a plan view, the right engagement portion 41A and the left engagement portion 41B are connected to the right handle 43A and the left handle 43B. Since it is configured to extend in the same direction, the rotation operation of the right handle 43A and the left handle 43B and the operation of the right engagement portion 41A and the left engagement portion 41B are the same in a plan view. In addition, it is possible to facilitate the engagement of the left engagement portion 41B, the right engaged portion 24A, and the left engaged portion 24B.

本発明は、上記構成に限定されるものではない。即ち、本発明の要旨を逸脱しない限り各種の設計変更等が可能である。 The present invention is not limited to the above configuration. That is, various design changes can be made without departing from the gist of the present invention.

右係合部４１Ａと右被係合部２４Ａ、左係合部４１Ｂと左被係合部２４Ｂ、との係合は、右操作柱４０Ａ、左操作柱４０Ｂが右縦支柱２１、左縦支柱２２に対して下側に移動するのを規制できるのであれば、例えば、右操作柱４０Ａ、左操作柱４０Ｂの下部に、右被係合部２４Ａ、左被係合部２４Ｂを配設し、左縦支柱２２の上部に、右係合部４１Ａ、左係合部４１Ｂを上下の向きを逆にして配設することも可能である。 The right engaging part 41A and the right engaged part 24A, and the left engaging part 41B and the left engaged part 24B are engaged with each other in the right operation column 40A and the left operation column 40B. If the movement to the lower side can be restricted, for example, the right engaged portion 24A and the left engaged portion 24B are disposed below the right operating column 40A and the left operating column 40B. It is also possible to dispose the right engaging portion 41A and the left engaging portion 41B in the upper part of the left vertical column 22 with their vertical directions reversed.

また、右係止部４２Ａ、左係止部４２Ｂと、右上支持部３４Ａ、左上支持部３４Ｂとの係止方法は、移動柱３０が下側に移動するのを規制できるのであれば、棒状の部材を用いる等、適宜変更することができる。 Further, the locking method of the right locking portion 42A, the left locking portion 42B, the upper right support portion 34A, and the upper left support portion 34B can be a rod-like shape as long as the moving column 30 can be restricted from moving downward. It can be appropriately changed such as using a member.

１０安全梯子
２０梯子
２１右縦支柱
２２左縦支柱
２３ステップ
２４Ａ右被係合部
２４Ｂ左被係合部
２５Ａ右下支持部
２５Ｂ左下支持部
３０移動柱
３１右縦柱
３２左縦柱
３３横柱
３４Ａ右上支持部
３４Ｂ左上支持部
４０操作柱
４０Ａ右操作柱
４０Ｂ左操作柱
４１Ａ右係合部
４１Ｂ左係合部
４２Ａ右係止部
４２Ｂ左係止部
５０移動ユニット 10 safety ladder 20 ladder 21 right vertical column 22 left vertical column 23 Step 24A right engaged unit 24B left engaged unit 25A lower right support unit 25B lower left support unit 30 moving column 31 right vertical column 32 left vertical column 33 horizontal column 34A Upper right support portion 34B Upper left support portion 40 Operation column 40A Right operation column 40B Left operation column 41A Right engagement portion 41B Left engagement portion 42A Right engagement portion 42B Left engagement portion 50 Moving unit

Claims

A safety ladder installed in a structure,
A ladder fixed to the structure having a pair of left and right vertical columns formed in a cylindrical shape and a step of connecting the vertical columns;
A movable unit movable between a standby position located on the ladder side and a pull-out position pulled up above the standby position;
With
The moving unit has a pair of left and right vertical columns that are slidably disposed in the vertical columns, and a horizontal column that connects the vertical columns, and a movable column to which a safety belt can be attached. ,
It is formed in a long shape and moves along the vertical direction with respect to the movable column and the vertical column to the upper support unit disposed on each vertical column and the lower support unit disposed on each vertical column. And a pair of operation columns supported by
An engaging portion is disposed at the lower part of each of the operation columns,
An engaged portion that engages with each of the engaging portions is disposed on the upper portion of each of the vertical struts,
The operation column is provided with a locking portion that is arranged on the lower side of the upper support portion and is formed so as to be able to lock the upper support portion,
The operation columns are pulled up and engaged with the engagement portions of the operation columns and the engaged portions of the vertical columns, which are located on the same side, so that the operation columns are moved to the vertical columns. Is restricted from moving downwards,
The upper support portion, which is located on the same side, is locked to the locking portion, thereby restricting the movement column from moving downward with respect to each operation column,
A safety ladder, wherein the moving unit is held in the drawer position.

2. The safety ladder according to claim 1, wherein the engaged portion extends in an oblique direction with respect to the step in a plan view and is at a position away from the operation column.

The operation column is supported by the upper support portion and the lower support portion so as to be rotatable about the vertical direction,
A handle is disposed at the upper end of the operation column,
In plan view, the engaging portion is formed to extend in the same direction as the handle,
The safety ladder according to claim 1 or 2, wherein the engaging portion is rotated to be engaged with the engaged portion.