JP2004176502A

JP2004176502A - Ladder

Info

Publication number: JP2004176502A
Application number: JP2002347314A
Authority: JP
Inventors: Atsufumi Norimatsu; 敦文乗松
Original assignee: Hasegawa Kogyo Co Ltd
Current assignee: Hasegawa Kogyo Co Ltd
Priority date: 2002-11-29
Filing date: 2002-11-29
Publication date: 2004-06-24
Anticipated expiration: 2022-11-29
Also published as: JP4019214B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ladder making a space to a wall adjustable to facilitate work to the wall and eliminate attaching/detaching labor for the work to the wall. <P>SOLUTION: The ladder has a pair of right and left side woods 4 , a plurality of tread sashes 5, and an adjusting device 11 for adjusting a distance from the wall. The adjusting device 11 for adjusting the distance from the wall is provided with a fixing metal fitting 31 fixed to the upper end of the side wood 4, a movable metal fitting 32 rotatably supported thereto, a contact member 33 fitted to the movable metal fitting 32 and coming into contact with the wall, and a stopper 35 fixing the movable metal fitting 32 in a use state and a housed state. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
この発明は、梯子に関し、特に、壁に立て掛けて使用する際の利便性を向上させた梯子に関する。
【０００２】
【従来の技術】
左右一対の側木および複数の踏桟からなる梯子は、建物に立て掛けて種々の用途に使用されている。梯子を壁に立て掛ける際には、側木の上端が壁に当接することになるが、この状態では、梯子の上部での壁への作業（壁紙貼り、塗装等）が壁に近づきすぎてやりにくいという問題があった。
【０００３】
そこで、壁との間に所定の間隔を設けるアタッチメント（梯子固定用治具）を必要に応じて着脱し壁への作業性を向上させることが提案されている（例えば特許文献１）。
【０００４】
【特許文献１】
実開平５−８９７９９号公報
【０００５】
【発明が解決しようとする課題】
上記従来の梯子では、アタッチメントを取り付けたままでの梯子の移動や保管が難しいため、壁への作業を行うごとにアタッチメントの着脱が必要となり、そのための手間が掛かるという問題があった。
【０００６】
この発明の目的は、壁との間隔が調整可能となって壁への作業がしやすくなるとともに、壁への作業のためのアタッチメント着脱の手間をなくした梯子を提供することにある。
【０００７】
【課題を解決するための手段および発明の効果】
この発明による梯子は、左右一対の側木、複数の踏桟および壁との間隔調整装置を備えており、壁との間隔調整装置は、側木の上端に固定された固定金具と、これに回動可能に支持された可動金具と、可動金具に取り付けられて壁に当接する当接部材と、可動金具を使用状態および収納状態で固定するストッパとを有していることを特徴とするものである。
【０００８】
当接部材は、壁に傷を付けないように、また、滑りにくいように、ゴム、合成樹脂などの弾性を有する材料で形成される。
【０００９】
この発明の梯子によると、壁との間隔調整装置は、側木の上端に上方突出状に固定された固定金具と、これに回動可能に支持された可動金具と、可動金具に取り付けられて壁に当接する当接部材と、可動金具を使用状態および収納状態で固定するストッパとを有しているので、壁への作業時に壁との間に間隔がほしい場合には、可動金具を回動させて側木上端と壁との間に可動金具を位置させた状態で、ストッパにより可動金具の動きを阻止すればよい。そして、可動金具を回動させてこれを側木の延長上に位置させた状態で、ストッパにより可動金具の動きを阻止することにより、壁への作業時に壁との間に間隔が必要でない場合や運搬および保管に際しては、壁との間隔調整装置を有していない梯子と全く同じに取り扱うことができる。
【００１０】
この発明による梯子のより具体的な構成は、例えば、固定金具は、梯子の中空状側木内に嵌め入れられて固定される角筒部と、角筒部の上方に設けられた左右立上り壁とからなり、左右立上り壁は、その中央部分を貫通する軸挿通孔と、その周縁に設けられた収納時ストッパ係合用切り欠きと、これと略９０°離れた位置にある使用時ストッパ係合用切り欠きとを有しており、可動金具は、固定金具の軸挿通孔に対応する軸挿通孔を有し固定金具の対向壁間に回動可能に収められる幅広部と、逆Ｕ字状に形成されて当接部材に設けられた凹所内に嵌め入れられた幅狭部とからなり、幅狭部の前後壁間に、ストッパ支持用のピンが渡し止められるとともに、幅広部の軸挿通孔よりも上の部分に、ストッパ収納孔が設けられており、ストッパは、その上端部がストッパ支持ピンに回動可能に支持されるとともに、ストッパ支持ピンに巻き掛けられたねじりコイルばねによって、ストッパ収納孔から出ていく方向に付勢されており、ストッパの下端部が固定金具の切り欠きの縁部に当たることによって、ねじりコイルばねの付勢力が受け止められ、ストッパの中間部分を押すことによって、ストッパと固定金具のストッパ係合用切り欠き縁部との係合が解除されるようになされているものとされる。
【００１１】
【発明の実施の形態】
この発明の実施の形態を、以下図面を参照して説明する。この明細書において、前とは図１の右を、後とは同図の左をいい、左右は前方に向かっていうものとする。
【００１２】
この発明による梯子は、左右一対の側木（２）および複数の踏桟（３）からなる下梯子（１）と、左右一対の側木（５）および複数の踏桟（６）からなり下梯子（１）の後に摺動自在に連結された上梯子（４）と、両梯子（１）（４）に渡された上梯子昇降ロープ（７）と、下梯子（１）の上端部に設けられて昇降ロープ（７）が巻き掛けられている滑車（８）と、上梯子（４）の下端部に設けられて昇降ロープ（７）の端部を保持するロープ保持部材（９）と、使用状態で下梯子（１）に対する上梯子（４）の下方への移動を阻止するとともに、この状態から上梯子（４）を所定量以上上方へ移動させたときにその移動を許容する梯子ロック・アンロック装置（１０）と、上梯子（４）の上端部に回動自在に設けられ梯子を壁（Ｗ）に立て掛ける際に壁（Ｗ）と梯子との間隔を調整する壁との間隔調整装置（１１）とを備えている。
【００１３】
下梯子（１）の上端部には、上梯子（４）を案内するコの字状案内金具（１２）が固定されており、滑車（８）は、同金具（１２）の右側面に固定された滑車支持金具（１３）に支持されている。
【００１４】
梯子ロック・アンロック装置（１０）は、公知のものでその詳細は省略するが、上梯子（４）の各側木（５）の内側面所定位置に下向きに揺動自在に取り付けられるとともにばねにより下梯子（１）方向に付勢されて下梯子（１）の踏桟（３）に嵌合する係止爪（１０ａ）を備えており、上梯子（４）を伸長させて係止爪（１０ａ）が下梯子（１）の踏桟（３）を越えてすぐに伸長を停止すると、係止爪（１０ａ）がその踏桟（３）に係合し、上梯子（４）をさらに伸長させて係止爪（１０ａ）が下梯子（１）の踏桟（３）を所定量以上越えてから伸長を停止すると、係止爪（１０ａ）と踏桟（３）との係合が解除されて、収縮可能状態が得られる。
【００１５】
ロープ保持部材（９）は、アルミニウム押出形材製であり、その押出方向を上下方向に向けて上梯子（４）の側木（５）の下端部外側面に取り付けられている。図２に拡大して示すように、ロープ保持部材（９）には、上下方向にのびかつ昇降ロープ（７）の一端部が挿通される横断面が円形の後側ロープ挿通部（２１）と、上下方向にのびかつ昇降ロープ（７）の他端部が挿通される横断面が円形の前側ロープ挿通部（２２）と、後側ロープ挿通部（２１）と前側ロープ挿通部（２２）との中間にあって上下方向にのびかつボルト（１４）の頭部（１４ａ）を含む部分が摺動可能に嵌め入れられる横断面Ｔ字状のボルト頭嵌入部（２３）とが形成されている。各ロープ挿通部（２１）（２２）の径は、昇降ロープ（７）が遊びを有して挿通できる大きさとされている。
【００１６】
壁との間隔調整装置（１１）は、図３から図７までに示すように、上梯子（４）の側木（５）の上端に上方突出状に固定された固定金具（３１）と、これに回動可能に支持された可動金具（３２）と、可動金具（３２）に角筒状の補助金具（３４）を介して取り付けられた当接部材（３３）と、可動金具（３２）を使用状態および収納状態で固定するストッパ（３５）とを有している。そして、図１の実線および図３に示すように、可動金具（３２）を回動させてこれを側木（４）の延長上に位置させた状態で、ストッパ（３５）により可動金具（３２）の動きを阻止することにより、壁との間隔調整装置（１１）を有していない梯子と同様の作業が可能であり、壁への作業時に壁との間にもっと大きな間隔がほしい場合には、図１の鎖線および図４に示すように、可動金具（３２）を回動させて側木（４）上端と壁（Ｗ）との間に可動金具（３２）を位置させた状態で、ストッパ（３５）により可動金具（３２）の動きを阻止することにより、必要な間隔を得ることができる。そして、この作業が終了すれば、可動金具（３２）を回動させて、図１の実線および図３に示す状態に復帰させることにより、運搬および保管についても、壁との間隔調整装置（１１）を有していない梯子と全く同じに取り扱うことができる。
【００１７】
固定金具（３１）は、側木（４）上端部内に嵌め入れられてリベット止めされた角筒部（３１ａ）と、角筒部（３１ａ）の上方に設けられた左右立上り壁（３１ｂ）とからなり、左右立上り壁（３１ｂ）は、その中央部分を左右方向に貫通する軸挿通孔（３６）と、円弧状に形成された周縁の上端部に設けられた収納時ストッパ係合用切り欠き（３７）と、これから９０°前方位置に設けられた使用時ストッパ係合用切り欠き（３８）とを有している。
【００１８】
可動金具（３２）は、押出形材製であり、固定金具（３１）の軸挿通孔（３６）に対応する軸挿通孔（３９）を有し固定金具（３１）の左右立上り壁（３１ｂ）間に回動可能に収められる幅広部（３２ａ）と、逆Ｕ字状に形成されて角筒状補助金具（３４）内に嵌め入れられた幅狭部（３２ｂ）とからなる。幅狭部（３２ｂ）は、前後壁および頂壁からなり、その前後壁間には、ストッパ支持ピン（４０）が渡し止められている。幅広部（３２ａ）の軸挿通孔（３９）よりも上の部分には、断面縦長方形のストッパ収納孔（４１）が設けられている。
【００１９】
固定金具（３１）と可動金具（３２）とは、両金具（３１）（３２）の軸挿通孔（３６）（３９）に挿通されたリベット（４２）によって結合されている。固定金具（３１）の軸挿通孔（３６）は、リベット（４２）が緩く挿通される大きさとされ、可動金具（３２）の軸挿通孔（３９）は、リベット（４２）がきつく挿通される大きさとされており、リベット（４２）には、固定金具（３１）の右立上り壁（３１ｂ）と可動金具（３２）の幅広部（３２ａ）右面との間に位置させられる平座金（４３）が嵌められている。
【００２０】
当接部材（３３）は、合成樹脂製で、その外面には、滑り止め効果を上げるための凹凸が形成されている。当接部材（３３）には、補助金具（３４）全体を収める凹所（３３ａ）が設けられており、同凹所（３３ａ）内に嵌め入れられた補助金具（３４）は、当接部材（３３）および補助金具（３４）を貫通するボルト（４４）およびこれにねじ合わされたナット（４５）によって結合されている。
【００２１】
ストッパ（３５）は、縦長の板状に形成されており、その上端部には、ストッパ支持ピン（４０）が挿通されている前後方向貫通孔（４６）を有する突出部（３５ａ）が左右方向内方に突出するように設けられている。ストッパ（３５）は、ストッパ支持ピン（４０）に両端部が巻き掛けられ中央部がストッパ（３５）に内側から当てられているたねじりコイルばね（４７）によって、ストッパ収納孔（４１）から出ていく方向に付勢されており、その下端部（３５ｂ）が固定金具（３１）の切り欠き（３７）（３８）の縁部に内側から当たることによって、ねじりコイルばね（４７）の付勢力が受け止められている。ストッパ（３５）の上下の中間部の外面には、凹凸が形成された操作部（３５ｃ）が設けられており、この操作部（３５ｃ）を押すことによって、ストッパ（３５）と固定金具（３１）の切り欠き（３７）（３８）縁部との係合が解除される。
【００２２】
図５および図６に示す状態では、壁との間隔調整装置（１１）は、収納状態にあり、ストッパ（３５）の下部が固定金具（３１）の収納時ストッパ係合用切り欠き（３７）に嵌まり合っており、ストッパ（３５）が取り付けられている可動金具（３２）を固定金具（３１）に対して回動させることはできない。この状態で、ストッパ（３５）の操作部（３５ｃ）を押すと、ストッパ（３５）の下部は、収納時ストッパ係合用切り欠き（３７）から外れてストッパ（３５）と固定金具（３１）との係合が解除される。ストッパ（３５）の操作部（３５ｃ）を押したまま、当接部材（３３）を持ってこれを前方に押すと、当接部材（３３）、補助金具（３４）、可動金具（３２）およびストッパ（３５）は、一体となって前方に回動する。この際、ストッパ（３５）は、ねじりコイルばね（４７）に付勢されて固定金具（３１）の立上り壁（３１ｂ）の内面に押し付けられており、回動の妨げとなることはない。当接部材（３３）、補助金具（３４）、可動金具（３２）およびストッパ（３５）が９０°回動すると、ねじりコイルばね（４７）に付勢されたストッパ（３５）は、その下部が使用時ストッパ係合用切り欠き（３８）に嵌まり合うことになり、その下端部（３５ｂ）が同切り欠き（３８）の縁部に内側から当たったところで停止させられる。こうして、当接部材（３３）は、９０°回動した状態で固定され、この状態で、梯子を使用することにより、壁（Ｗ）との間隔を大きくすることができる。ストッパ（３５）を押して当接部材（３３）を回動させる操作は、非常に簡単なものであることから、使用状態（壁（Ｗ）との間隔が大）と収納状態（壁（Ｗ）との間隔が小さい使用状態を含む）との切換えを手間なく行うことができる。
【００２３】
なお、上記の実施形態では、二連梯子に壁との間隔調整装置（１１）を設けた例を示したが、壁との間隔調整装置は、もちろん、一連だけの梯子にも設けることができる。
【図面の簡単な説明】
【図１】この発明による梯子を示す側面図である。
【図２】ロープ支持部分の拡大斜視図である。
【図３】壁との間隔調整装置を示す拡大側面図である。
【図４】同じく壁との間隔調整装置を示す拡大側面図であり、その使用状態を示している。
【図５】壁との間隔調整装置を示す一部を切り欠いた側面図である。
【図６】図５のＶＩ−ＶＩ線に沿う断面図である。
【図７】壁との間隔調整装置の分解斜視図である。
【符号の説明】
（４）側木
（３１）固定金具
（３１ａ）角筒部
（３１ｂ）左右立上り壁
（３２）可動金具
（３２ａ）幅広部
（３２ｂ）幅狭部
（３３）当接部材
（３３ａ）凹所
（３５）ストッパ
（３５ｂ）下端部
（３６）軸挿通孔
（３７）収納時ストッパ係合用切り欠き
（３８）使用時ストッパ係合用切り欠き
（３９）軸挿通孔
（４０）ストッパ支持用のピン
（４１）ストッパ収納孔
（４７）ねじりコイルばね[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a ladder, and more particularly to a ladder having improved convenience when used on a wall.
[0002]
[Prior art]
A ladder including a pair of left and right side trees and a plurality of steps is used for various purposes by leaning against a building. When the ladder is leaned against the wall, the upper end of the side stub will come into contact with the wall. In this state, the work (wallpaper application, painting, etc.) on the upper part of the ladder will be too close to the wall. There was a problem that it was difficult.
[0003]
Therefore, it has been proposed that an attachment (ladder fixing jig) providing a predetermined space between the wall and the wall is detached as necessary to improve the workability on the wall (for example, Patent Document 1).
[0004]
[Patent Document 1]
Japanese Utility Model Laid-Open No. 5-89799 [0005]
[Problems to be solved by the invention]
In the above-mentioned conventional ladder, it is difficult to move or store the ladder with the attachment attached, so that the attachment and detachment of the attachment is required every time work is performed on the wall, and there is a problem that it takes time and effort.
[0006]
An object of the present invention is to provide a ladder in which the distance to the wall can be adjusted to facilitate the work on the wall, and the attachment and detachment of the attachment for the work on the wall is eliminated.
[0007]
Means for Solving the Problems and Effects of the Invention
A ladder according to the present invention includes a pair of left and right side trees, a plurality of steps, and a gap adjusting device for a wall. The gap adjusting device for a wall is fixed to a top end of a side tree by a fixing bracket. A movable metal member rotatably supported, a contact member attached to the movable metal member and abutting against a wall, and a stopper for fixing the movable metal member in a used state and a stored state. It is.
[0008]
The contact member is formed of an elastic material such as rubber or synthetic resin so as not to damage the wall and to prevent slippage.
[0009]
According to the ladder of the present invention, the gap adjusting device for the wall is fixed to the upper end of the side tree so as to protrude upward, the movable bracket rotatably supported by the fixing bracket, and attached to the movable bracket. Since it has a contact member that contacts the wall and a stopper that fixes the movable bracket in the used state and the stored state, if there is a gap between the wall and the wall when working on the wall, the movable bracket is turned. In a state where the movable metal fitting is moved between the upper end of the side tree and the wall, the movement of the movable metal fitting may be prevented by the stopper. When the movable bracket is rotated and positioned on the extension of the side tree, the movement of the movable bracket is prevented by the stopper, so that there is no need for an interval between the wall and the wall when working on the wall. For transportation and storage, the ladder can be handled in exactly the same way as a ladder that does not have a wall adjustment device.
[0010]
A more specific configuration of the ladder according to the present invention includes, for example, a fixing bracket, a square tube portion fixed by being fitted into a hollow side bar of the ladder, and a right and left rising wall provided above the square tube portion. The left and right rising walls are formed with a shaft insertion hole penetrating the central portion thereof, a notch for storing stopper engagement provided on the peripheral edge thereof, and a notch for use stopper engagement at a position approximately 90 ° away from the notch. The movable bracket has a shaft insertion hole corresponding to the shaft insertion hole of the fixed bracket, and has a wide portion rotatably received between opposed walls of the fixed bracket, and is formed in an inverted U-shape. And a narrow portion fitted into a recess provided in the contact member, and a pin for supporting the stopper is stopped between the front and rear walls of the narrow portion, and the shaft insertion hole of the wide portion is A stopper storage hole is provided in the upper part, and the stopper is The upper end of the stopper is rotatably supported by the stopper support pin, and is urged in a direction to come out of the stopper storage hole by a torsion coil spring wound around the stopper support pin. By hitting the edge of the notch of the fixing bracket, the urging force of the torsion coil spring is received, and by pressing the intermediate portion of the stopper, the engagement between the stopper and the notch edge for stopper engagement of the fixing bracket is released. It is assumed that it has been made.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In this specification, the front means the right in FIG. 1, the rear means the left in the figure, and the left and right refer to the front.
[0012]
A ladder according to the present invention comprises a lower ladder (1) comprising a pair of left and right side bars (2) and a plurality of steps (3), and a lower ladder comprising a pair of left and right side bars (5) and a plurality of steps (6). Upper ladder (4) slidably connected after ladder (1), upper ladder lifting rope (7) passed to both ladders (1) and (4), and upper end of lower ladder (1) A pulley (8) provided and around which a lifting rope (7) is wound; and a rope holding member (9) provided at a lower end of the upper ladder (4) and holding an end of the lifting rope (7). A ladder that prevents the lower ladder (1) from moving downward with respect to the lower ladder (1) in use, and allows the upper ladder (4) to move by a predetermined amount or more from this state. A lock / unlock device (10) and a ladder that is rotatably provided at the upper end of the upper ladder (4) and stands on the wall (W). Wall (W) when the kick to have a spacing device between the wall for adjusting the distance between the ladder (11).
[0013]
A U-shaped guide fitting (12) for guiding the upper ladder (4) is fixed to the upper end of the lower ladder (1), and the pulley (8) is fixed to the right side of the fitting (12). Supported by the pulley support fitting (13).
[0014]
The ladder lock / unlock device (10) is a known device, and details thereof are omitted. The ladder lock / unlock device (10) is attached to a predetermined position on the inner surface of each side tree (5) of the upper ladder (4) so as to be swingable downward and a spring. And a locking claw (10a) which is urged in the direction of the lower ladder (1) to fit into the step (3) of the lower ladder (1) by extending the upper ladder (4). When (10a) stops extending immediately after crossing the step (3) of the lower ladder (1), the locking claw (10a) engages with the step (3) and further moves the upper ladder (4). When the extension is stopped and the extension is stopped after the locking claw (10a) exceeds the step (3) of the lower ladder (1) by a predetermined amount or more, the engagement between the locking claw (10a) and the step (3) is stopped. It is released and a contractible state is obtained.
[0015]
The rope holding member (9) is made of an extruded aluminum material, and is attached to the outer surface of the lower end portion of the side member (5) of the upper ladder (4) with its extruding direction directed vertically. As shown in an enlarged manner in FIG. 2, the rope holding member (9) has a rear rope insertion part (21) extending vertically and having a circular cross section through which one end of the lifting rope (7) is inserted. A front rope insertion part (22) having a circular cross section, which extends vertically and through which the other end of the lifting rope (7) is inserted, a rear rope insertion part (21), and a front rope insertion part (22). A bolt head fitting portion (23) having a T-shaped cross section, which extends in the vertical direction and has a portion including the head portion (14a) of the bolt (14) slidably fitted therein. The diameter of each of the rope insertion portions (21) and (22) is set to a size that allows the lifting rope (7) to be inserted with play.
[0016]
As shown in FIG. 3 to FIG. 7, the space adjusting device (11) with the wall includes a fixing bracket (31) fixed to the upper end of the side bar (5) of the upper ladder (4) so as to protrude upward. A movable bracket (32) rotatably supported on the movable bracket, an abutting member (33) attached to the movable bracket (32) via a rectangular cylindrical auxiliary bracket (34), and a movable bracket (32). And a stopper (35) for fixing in a use state and a storage state. Then, as shown in the solid line of FIG. 1 and FIG. 3, the movable bracket (32) is rotated and is positioned on the extension of the side block (4), and the movable bracket (32) is moved by the stopper (35). ), It is possible to perform the same operation as a ladder without the space adjusting device (11) for the wall, and when a larger space is required between the ladder and the wall when working on the wall. As shown in the chain line in FIG. 1 and FIG. 4, the movable bracket (32) is rotated to position the movable bracket (32) between the upper end of the side member (4) and the wall (W). By stopping the movement of the movable fitting (32) by the stopper (35), a necessary interval can be obtained. When this operation is completed, the movable bracket (32) is rotated to return to the state shown in the solid line in FIG. 1 and the state shown in FIG. ) Can be treated exactly the same as a ladder without.
[0017]
The fixing bracket (31) includes a square tube portion (31a) fitted in the upper end portion of the side member (4) and riveted, and a right and left rising wall (31b) provided above the square tube portion (31a). The left and right rising walls (31b) are formed with a shaft insertion hole (36) penetrating the center part in the left and right direction, and a notch for storage stopper engagement (not shown) provided at the upper end of the arc-shaped peripheral edge. 37) and a notch (38) for use in engagement with the stopper at the time of use provided at a position 90 degrees forward from this.
[0018]
The movable fitting (32) is made of an extruded shape, has a shaft insertion hole (39) corresponding to the shaft insertion hole (36) of the fixing fitting (31), and has a left and right rising wall (31b) of the fixing fitting (31). It comprises a wide portion (32a) rotatably housed in between, and a narrow portion (32b) formed in an inverted U-shape and fitted in a rectangular cylindrical auxiliary fitting (34). The narrow portion (32b) includes front and rear walls and a top wall, and a stopper support pin (40) is interposed between the front and rear walls. A stopper storage hole (41) having a rectangular cross section is provided in a portion of the wide portion (32a) above the shaft insertion hole (39).
[0019]
The fixed fitting (31) and the movable fitting (32) are connected by a rivet (42) inserted into the shaft insertion holes (36) (39) of the two fittings (31) (32). The shaft insertion hole (36) of the fixing bracket (31) is sized to allow the rivet (42) to be loosely inserted, and the shaft insertion hole (39) of the movable bracket (32) is inserted tightly by the rivet (42). The rivet (42) has a flat washer (43) located between the right rising wall (31b) of the fixing bracket (31) and the right side of the wide portion (32a) of the movable bracket (32). Is fitted.
[0020]
The contact member (33) is made of a synthetic resin, and its outer surface is formed with irregularities for enhancing a non-slip effect. The contact member (33) is provided with a recess (33a) for accommodating the entire auxiliary fitting (34), and the auxiliary fitting (34) fitted in the recess (33a) includes a contact member. (33) and a bolt (44) passing through the auxiliary fitting (34) and a nut (45) screwed to the bolt (44).
[0021]
The stopper (35) is formed in a vertically long plate shape, and a protrusion (35a) having a front-rear through-hole (46) into which a stopper support pin (40) is inserted is provided at the upper end thereof in the left-right direction. It is provided so as to protrude inward. The stopper (35) is extended from the stopper housing hole (41) by a torsion coil spring (47) whose both ends are wound around the stopper support pin (40) and whose center is applied to the stopper (35) from the inside. When the lower end portion (35b) of the fixing member (31) comes into contact with the edge of the notch (37) (38) from the inside, the urging force of the torsion coil spring (47) is applied. Is received. An operation portion (35c) having irregularities is provided on the outer surface of the upper and lower intermediate portion of the stopper (35). By pressing the operation portion (35c), the stopper (35) and the fixing bracket (31) are pressed. ) Is disengaged from the notches (37) and (38).
[0022]
In the state shown in FIG. 5 and FIG. 6, the space adjusting device (11) with the wall is in the housed state, and the lower part of the stopper (35) is in the notch (37) for engaging the stopper at the time of housing the fixing bracket (31). The movable fitting (32) fitted with the stopper (35) and attached thereto cannot be rotated with respect to the fixed fitting (31). In this state, when the operation portion (35c) of the stopper (35) is pressed, the lower portion of the stopper (35) is disengaged from the notch (37) for engaging the stopper at the time of storage, and the stopper (35) and the fixing bracket (31) are disengaged. Is disengaged. While holding down the operation part (35c) of the stopper (35) and holding the contact member (33) and pushing it forward, the contact member (33), the auxiliary fitting (34), the movable fitting (32) and The stopper (35) rotates forward integrally. At this time, the stopper (35) is urged by the torsion coil spring (47) and pressed against the inner surface of the rising wall (31b) of the fixing bracket (31), and does not hinder rotation. When the contact member (33), the auxiliary fitting (34), the movable fitting (32), and the stopper (35) rotate by 90 °, the lower part of the stopper (35) urged by the torsion coil spring (47) has a lower part. At the time of use, the notch (38) for stopper engagement fits into the notch (38), and is stopped when the lower end (35b) hits the edge of the notch (38) from the inside. In this way, the contact member (33) is fixed in a state of being rotated by 90 °, and in this state, by using the ladder, the distance between the contact member (33) and the wall (W) can be increased. Since the operation of pressing the stopper (35) to rotate the contact member (33) is very simple, the operation state (the distance from the wall (W) is large) and the storage state (the wall (W)) are used. (Including the use state in which the interval between the two is small).
[0023]
In the above-described embodiment, an example is shown in which the double ladder is provided with the gap adjusting device (11) with the wall. However, the gap adjusting device with the wall can of course be provided on only a series of ladders. .
[Brief description of the drawings]
FIG. 1 is a side view showing a ladder according to the present invention.
FIG. 2 is an enlarged perspective view of a rope supporting portion.
FIG. 3 is an enlarged side view showing an apparatus for adjusting a distance from a wall.
FIG. 4 is an enlarged side view showing the gap adjusting device with respect to a wall, showing a use state thereof.
FIG. 5 is a partially cutaway side view showing a space adjusting device with respect to a wall.
FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;
FIG. 7 is an exploded perspective view of an apparatus for adjusting a distance from a wall.
[Explanation of symbols]
(4) Side piece (31) Fixing fitting (31a) Square tube part (31b) Right and left rising wall (32) Movable fitting (32a) Wide part (32b) Narrow part (33) Contact member (33a) Recess ( 35) Stopper (35b) Lower end (36) Shaft insertion hole (37) Notch for stopper engagement at storage (38) Notch for stopper engagement at use (39) Shaft insertion hole (40) Pin for stopper support (41) ) Stopper storage hole (47) Torsion coil spring

Claims

A pair of left and right side bars (4), a plurality of steps (5), and a gap adjusting device (11) with the wall are provided, and the gap adjusting device (11) with the wall is provided at the upper end of the side bar (4). A fixed fixture (31), a movable fixture (32) rotatably supported by the fixture, a contact member (33) attached to the movable fixture (32) and abutting against a wall, and a movable fixture (33). A ladder characterized in that the ladder has a stopper (35) for fixing the device in the use state and the stored state.

The fixing bracket (31) includes a square tube portion (31a) fitted and fixed in the hollow side tree (4), and a right and left rising wall (31b) provided above the square tube portion (31a). The left and right rising walls (31b) are provided with a shaft insertion hole (36) penetrating the central portion thereof, a storage stopper engaging notch (37) provided on a peripheral edge thereof, and a distance of approximately 90 ° therefrom. The movable bracket (32) has a shaft insertion hole (39) corresponding to the shaft insertion hole (36) of the fixing bracket (31). A wide portion (32a) rotatably housed between opposed walls (31b) of the fixing bracket (31), and a recess (33a) formed in an inverted U-shape and provided in the contact member (33). A narrow portion (32b) fitted into the inside, and a gap is formed between the front and rear walls of the narrow portion (32b). The stopper supporting pin (40) is stopped and the stopper accommodating hole (41) is provided in a portion of the wide portion (32b) above the shaft insertion hole (39). The upper end is rotatably supported by the stopper support pin (40), and comes out of the stopper housing hole (41) by a torsion coil spring (47) wound around the stopper support pin (40). When the lower end (35b) of the stopper (35) comes into contact with the edges of the notches (37) and (38) of the fixing bracket (31), the urging force of the torsion coil spring (47) is exerted. Is pressed, and the stopper (35) is pushed in the middle to release the engagement between the stopper (35) and the edge of the stopper fitting notch (37) (38) of the fixture (31). What 2. The ladder of claim 1, wherein the ladder is configured.