JP6661864B2

JP6661864B2 - Telescopic device

Info

Publication number: JP6661864B2
Application number: JP2015174629A
Authority: JP
Inventors: 修江良
Original assignee: Pica Corp
Current assignee: Pica Corp
Priority date: 2015-09-04
Filing date: 2015-09-04
Publication date: 2020-03-11
Anticipated expiration: 2035-09-04
Also published as: JP2017048650A

Description

本発明は、例えば梯子や脚立の伸縮自在な支柱等の伸縮装置に関するものである。 TECHNICAL FIELD The present invention relates to a telescopic device such as a ladder or a stepladder that can be telescopically extended.

例えば脚立の支柱の伸縮装置には、外套体に挿入体を伸縮自在に挿入すると共に、外套体に挿入体を伸縮した位置で固定するロック機構を設け、ロック機構は外套体に固定の支持フレームと、この支持フレームに対して揺動自在に枢支されていて挿入体の被係合部と係合するロック部材と、このロック部材を挿入体から離脱揺動させるハンドルを有したものがある。 For example, in a telescopic device of a strut post, a lock mechanism for inserting an insert into a mantle so as to be able to expand and contract and fixing the insert to the mantle at a position where the insert is stretched is provided, and the lock mechanism is a support frame fixed to the mantle. And a lock member pivotally supported on the support frame and engaged with the engaged portion of the insert, and a handle having a handle for detaching and swinging the lock member from the insert. .

この種の従来の伸縮装置では、ハンドルは、ロック部材を支持すると共に軸心方向移動自在に前記支持フレームの一対の側壁部に貫通支持された枢支部と、この枢支部と一体的に形成されていてロック部材を揺動する掛止部とを備え、ハンドルを支持フレームに対して揺動方向と直交する方向に移動自在に支持し、支持フレームの側壁部に前記掛止部と掛止する掛止孔を設け、ロック部材が挿入体をロックしているときに、ハンドルの移動で掛止部を掛止孔に掛止することにより、ハンドル乃至ロック部材を揺動不能にしてロック部材の離脱揺動を阻止するようにしたものがある（例えば特許文献１）。 In the conventional telescopic device of this type, the handle supports the lock member and is formed integrally with the pivot supporting portion that is supported by the pair of side walls of the support frame so as to be freely movable in the axial direction. And a hook for swinging the lock member. The handle is movably supported in a direction orthogonal to the swing direction with respect to the support frame, and is hooked to the side wall of the support frame with the hook. A locking hole is provided, and when the locking member locks the insertion body, the handle is moved to lock the locking portion in the locking hole, so that the handle or the locking member cannot be swung and the locking member is locked. There is one that prevents the detachment swing (for example, Patent Document 1).

特開２００６−５２５８１号公報JP 2006-52581 A

しかし、従来の場合、ハンドルの揺動操作によってロック部材を挿入体に係合した後に、ハンドルを揺動方向と直交する方向に移動させて掛止部を掛止孔に掛止する必要があるし、また、ロック部材を挿入体から離脱する場合には、まずハンドルを揺動方向と直交する方向に移動して掛止部の掛止孔への掛止を解除し、その後ハンドルの揺動操作によってロック部材を挿入体から離脱させなければならず、伸縮調整の操作が非常に面倒であるという問題があった。 However, in the case of the related art, after the lock member is engaged with the insert by the swinging operation of the handle, it is necessary to move the handle in a direction orthogonal to the swing direction so that the latch portion is latched in the latch hole. When the lock member is to be removed from the insertion body, first, the handle is moved in a direction perpendicular to the swinging direction to release the engagement of the engagement portion with the engagement hole. There has been a problem that the operation of adjusting the expansion and contraction is very troublesome because the lock member must be detached from the insertion body by the operation.

本発明は上記問題点に鑑み、ロック部材の離脱揺動を阻止できると共に、伸縮調整の操作を簡単になし得るようにした伸縮装置を提供することを目的としている。 In view of the above problems, an object of the present invention is to provide a telescopic device that can prevent detachment and swinging of a lock member and can easily perform a telescopic adjustment operation.

本発明における課題解決のための具体的手段は、次の通りである。
この技術的課題を解決する本発明の技術的手段は、対向配置される一対の外套体８及び各外套体８内に伸縮自在に挿入されていて下端が接地可能な挿入体９を有する一対の伸縮体５と、
一対の伸縮体５の外套体８の対向面に長手方向両端が対向して連結されている上下複数段の踏桟部材６と、
各外套体８の対向面でかつ下段の踏桟部材６との連結位置近傍に配置されていて、外套体８に挿入されている挿入体９を伸縮した位置で外套体８に対して固定するロック機構７と、
各外套体８の対向面に沿ってロック機構７から上段の踏桟部材６の近傍まで延設されていて、各ロック機構７をロック動作及びロック解除動作させる長尺操作部材６９と、を備えており、
前記各ロック機構７は外套体８に固定の支持フレーム１８と、この支持フレーム１８に対して揺動自在に枢支されていて挿入体９の被係止部１１と係合するロック部材２３とを有しており、
前記支持フレーム１８に、長尺操作部材６９の下端部に連結されていてロック位置Ｘとロック解除位置Ｙとに移動自在に支持された連動具２７と、連動具２７がロック位置Ｘに移動するときにロック部材２３を挿入体９と係合させかつ連動具２７がロック解除位置Ｙに移動するときにロック部材２３を挿入体９から離脱させる連動手段２９とが、設けられ、
連動具２７がロック位置Ｘに移動したときにロック部材２３の離脱揺動を阻止しかつ連動具２７がロック位置Ｘから外れたときにロック部材２３の離脱揺動を許容する離脱阻止手段３０が設けられている点にある。 The specific means for solving the problems in the present invention are as follows.
The technical means of the present invention for solving this technical problem includes a pair of mantles 8 arranged opposite to each other and a pair of mantles 8 which are inserted into each mantle 8 so as to be extendable and contractable and whose lower end can be grounded. Elastic body 5,
A plurality of upper and lower step members 6 whose longitudinal ends are connected to the opposing surfaces of the mantle 8 of the pair of elastic members 5 so as to face each other;
The inserts 9 that are arranged on the opposing surfaces of the respective outer jackets 8 and near the connecting position with the lower step member 6 and are inserted into the outer jackets 8 are fixed to the outer jackets 8 at the expanded and contracted positions. A lock mechanism 7,
A long operating member 69 extending from the lock mechanism 7 to the vicinity of the upper step member 6 along the opposing surface of each mantle 8 and performing a lock operation and a lock release operation of each lock mechanism 7. And
Each of the lock mechanisms 7 includes a support frame 18 fixed to the jacket 8, a lock member 23 pivotally supported on the support frame 18 and engaged with the locked portion 11 of the insert 9. Has,
The interlocking device 27 connected to the lower end of the long operation member 69 and movably supported by the lock position X and the unlock position Y on the support frame 18, and the interlocking device 27 moves to the lock position X. Interlocking means 29 for engaging the lock member 23 with the insert 9 and for releasing the lock member 23 from the insert 9 when the interlocking tool 27 moves to the unlock position Y,
When the interlocking tool 27 moves to the lock position X, the detachment preventing means 30 for preventing the detachment swinging of the lock member 23 and allowing the detachment and swinging of the lock member 23 when the interlocking tool 27 deviates from the lock position X is provided. It is in the point provided.

また、本発明の他の技術的手段は、前記連動手段２９は、連動具２７の移動により押動されるロック部材２３に突設した操作片５５と、操作片５５を連動具２７の移動方向に挟むように連動具２７に突設した第１押動片５８及び第２押動片５９とを備え、連動具２７がロック位置Ｘに移動するときにロック部材２３を係合方向に揺動させるべく第１押動片５８が操作片５５を押動し、連動具２７がロック解除位置Ｙに移動するときにロック部材２３を離脱方向に揺動させるべく第２押動片５９が操作片５５を押動するように構成され、
前記離脱阻止手段３０は、ロック部材２３の揺動端部側に連動具２７に向けて突設した押圧部５４と、連動具２７に押圧部５４に向けて突設した規制部６０とを備え、連動具２７がロック位置Ｘに移動したときに、押圧部５４と規制部６０とが対向し、連動具２７がロック位置Ｘから外れたときに規制部６０が押圧部５４対向位置から外れるように構成され、
連動具２７がロック位置Ｘからロック解除位置Ｙに移動するときに、規制部６０が押圧部５４に対して外れた後にロック部材２３の離脱揺動が開始されるように、第２押動片５９と操作片５５との間にアイドル間隙６５が形成されている点にある。 Further, another technical means of the present invention is that the interlocking means 29 includes an operating piece 55 protruding from the lock member 23 pushed by the movement of the interlocking tool 27 and a moving direction of the operating piece 55 in the moving direction of the interlocking tool 27. A first pushing piece 58 and a second pushing piece 59 protrudingly provided on the interlocking tool 27 so as to be interposed therebetween. When the interlocking tool 27 moves to the lock position X, the lock member 23 is swung in the engagement direction. The first pushing piece 58 pushes the operating piece 55 to move the lock member 23 in the release direction when the interlocking tool 27 moves to the unlock position Y. 55 to be pushed,
The detachment preventing means 30 includes a pressing portion 54 protruding toward the interlocking device 27 on the swinging end side of the lock member 23 and a regulating portion 60 protruding toward the pressing portion 54 on the interlocking device 27. When the interlocking device 27 moves to the lock position X, the pressing portion 54 and the restricting portion 60 face each other, and when the interlocking device 27 deviates from the lock position X, the restricting portion 60 comes off from the pressing portion 54 opposing position. Is composed of
When the interlocking tool 27 moves from the locked position X to the unlocked position Y, the second pushing piece is started so that the detachment swing of the lock member 23 is started after the restricting portion 60 comes off from the pressing portion 54. The point is that an idle gap 65 is formed between 59 and the operation piece 55.

また、本発明の他の技術的手段は、前記連動具２７をロック位置Ｘに付勢する付勢部材９１が設けられ、前記ロック機構７はロック部材２３を揺動自在に支持する枢支軸２４と、枢支軸２４に支持されたハンドル２５とを有しており、
このハンドル２５は、一端が枢支軸２４に連結された把持部４１と、この把持部４１の他端から連動具２７側に突出した作動部４２とを備え、
前記作動部４２と連動具２７との間に、ハンドル２５を枢支軸２４廻りに回動操作することにより連動具２７を付勢部材９１の付勢に抗してロック解除位置Ｙに押動する連動具押動手段６７が設けられている点にある。 Further, another technical means of the present invention is provided with an urging member 91 for urging the interlocking member 27 to the lock position X, and the lock mechanism 7 pivotally supports the lock member 23 in a swingable manner. 24, and a handle 25 supported on the pivot 24.
The handle 25 is provided at one end with the grip portion 41 connected to the pivot shaft 24, an actuating portion 42 that protrudes in conjunction device 27 side from the other end of the grip portion 41,
By rotating the handle 25 about the pivot 24 between the operating portion 42 and the interlocking device 27, the interlocking device 27 is pushed to the unlock position Y against the urging of the urging member 91. interlocking member pressing means 67 for is in the point that vignetting set.

また、本発明の他の技術的手段は、前記各外套体８はその対向面で長尺操作部材６９を上下移動可能に保持されており、
前記支持フレーム１８はその背壁部３３の内面で連動具２７を外套体８の対向面に沿って上下方向摺動可能に保持している点にある。 Further, another technical means of the present invention is that each of the mantles 8 holds a long operation member 69 so as to be able to move up and down on its opposing surface,
The support frame 18 is characterized in that the interlocking device 27 is held on the inner surface of the back wall portion 33 so as to be vertically slidable along the facing surface of the mantle 8.

本発明によれば、外套体の対向面に沿ってロック機構から上段の踏桟部材の近傍まで延設された長尺操作部材で連動具を操作して、連動具がロック位置に移動したときに連動手段によりロック部材を挿入体と係合させ、このとき同時に離脱阻止手段がロック部材の離脱揺動を阻止するため、離脱阻止手段によってロック部材の挿入体への係合が不測に外れるのを防止することができる。しかも、連動具がロック解除位置に移動するときに、連動具がロック位置から外れると離脱阻止手段がロック部材の離脱揺動を許容し、連動具がロック解除位置に移動すると、連動手段がロック部材を挿入体から離脱させるため、連動具のロック位置乃至ロック解除位置への移動によって、ロック部材の挿入体への係合と挿入体からの離脱とを簡単に変更操作することができ、上段の踏桟部材の近傍から伸縮調整の操作を簡単になし得る。 According to the present invention, when the interlock is operated by the long operating member extending from the lock mechanism to the vicinity of the upper step member along the opposing surface of the mantle, and the interlock is moved to the lock position. The lock member is engaged with the insert by the interlocking means, and at the same time, the release prevention means prevents the release member from swinging at the same time, whereby the engagement of the lock member with the insert is unexpectedly released by the release prevention means. Can be prevented. In addition, when the interlocking device moves to the unlock position, if the interlocking device deviates from the lock position, the release preventing means allows the locking member to release and swing, and when the interlocking device moves to the unlocking position, the interlocking device locks. for disengaging the member from the insert, by moving to the locked position to the unlocked position of the interlocking device, it is possible to easily change the operation of detachment and from engagement with the insert of the insert of the lock member, the upper The operation of adjusting the expansion and contraction can be easily performed from the vicinity of the step member .

本発明の一実施形態を示す脚立の一部断面正面図である。It is a partial section front view of a stepladder showing one embodiment of the present invention. 同支柱の斜視図である。It is a perspective view of the same support | pillar. 同支柱の内側から見た側面図である。It is the side view seen from the inside of the same pillar. 同支柱下部の正面断面図である。It is front sectional drawing of the lower part of the said support | pillar. 同ロックを解除した状態の支柱下部の正面断面図である。It is front sectional drawing of the support | pillar lower part of the state which released the lock. 同支柱上部の正面断面図である。It is front sectional drawing of the same support | pillar upper part. 図４のＡ−Ａ線断面図である。FIG. 5 is a sectional view taken along line AA of FIG. 4. 図６のＢ−Ｂ線断面図である。FIG. 7 is a sectional view taken along line BB of FIG. 6. ロック部材及びハンドル等の分解斜視図である。It is an exploded perspective view of a lock member, a handle, and the like. 下ガイド部材、連結体、連動具等の分解斜視図である。It is an exploded perspective view of a lower guide member, a connection body, an interlocking tool, etc. 脚立の全体側面図である。It is a whole side view of a stepladder.

以下、本発明の実施形態を図面に基づいて説明する。
図１〜図１１は本発明の伸縮装置を脚立に実施した脚立の構成を示している。図１及び図１１において、脚立１は、対向配置された一対の梯子２の上部を互いにブラケット３を介してピン４により枢支することにより主構成されている。この脚立１は一対の梯子２を接地面に立てかけることで使用できると共に、一対の梯子２を開かないように両梯子２をロックしている開き止め具のロックを解除して一方の梯子２をピン４廻りに回動させることで使用することができるものである。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 11 show the configuration of a stepladder in which the telescopic device of the present invention is implemented on a stepladder. 1 and 11, the stepladder 1 is mainly configured by pivotally supporting upper portions of a pair of ladders 2 opposed to each other with pins 4 via brackets 3. This stepladder 1 can be used by leaning a pair of ladders 2 against a ground surface, and unlocking a locking device that locks the two ladders 2 so as not to open the pair of ladders 2 and one ladder 2 can be used. It can be used by rotating it around the pin 4.

梯子２は、左右に間隔をおいて配置されて伸縮自在な一対の支柱５（伸縮体）と、この左右支柱５をそれぞれ連結する複数の踏桟部材６と、支柱５と踏桟部材６との間に設けられたロック機構７を有している。
なお、以下の説明において、説明の便宜上、図１に示すように、踏桟部材６を正面視できて、支柱５が並列している方向（図１の紙面左右方向）を左右方向とし、図１１に示すように梯子２の並列方向（図１１の紙面左右方向）を前後方向とする。 The ladder 2 includes a pair of struts 5 (elastic bodies) which are arranged at right and left intervals and can extend and contract, a plurality of step members 6 respectively connecting the left and right struts 5, and the struts 5 and the step members 6. And a lock mechanism 7 provided therebetween.
In the following description, for convenience of explanation, as shown in FIG. 1, the step member 6 can be viewed from the front, and the direction in which the columns 5 are arranged side by side (the left-right direction in FIG. 1) is referred to as the left-right direction. As shown in FIG. 11, the parallel direction of the ladders 2 (the left-right direction in FIG. 11) is the front-back direction.

各支柱５は、チャンネル材で形成された支柱本体８（外套体）と、この支柱本体８内に挿入された角筒状の脚柱９（挿入体）とを有しており、脚柱９を軸心方向（上下方向）にスライドすることによって支柱５は伸縮自在となっていて、脚柱９はロック機構７によって伸縮した所定の位置で軸心方向移動不能に固定されるようになっている。
図１〜１０において、支柱本体８はアルミニウム等の金属系で断面視略コの字状に形成され、この支柱本体８が向き合っている支柱本体８の対向部側には長手方向に開口溝１０が形成されている。 Each strut 5 has a strut body 8 (outer body) formed of a channel material, and a prismatic pillar 9 (inserted body) inserted into the strut body 8. By sliding in the axial direction (vertical direction), the column 5 can be expanded and contracted, and the pillar 9 is fixed so as to be immovable in the axial direction at a predetermined position expanded and contracted by the lock mechanism 7. I have.
1 to 10, a column main body 8 is formed of a metal such as aluminum and has a substantially U-shape in cross section, and an opening groove 10 is formed in a longitudinal direction on an opposing portion side of the column main body 8 with which the column main body 8 faces. Are formed.

脚柱９は支柱本体８と同様にアルミニウム等の金属系で形成されており、支柱本体８の対向側の開口溝１０に対応する位置の側壁には複数の被係止部１１（ラック部）が形成されている。脚柱９の下端部には接地部材１２が装着され、この接地部材１２により梯子２が安定した状態で接地面に接地するようになっている。脚柱９の挿入基部である上部に、後述するロック機構７の支持フレーム１８に当接して脚柱９を支柱本体８から抜け止めする抜け止め部材１５が開口溝１０から外方突出状に設けられている。 The pillar 9 is made of a metal such as aluminum similarly to the pillar main body 8, and a plurality of locked portions 11 (rack portions) are provided on a side wall of the pillar main body 8 at a position corresponding to the opening groove 10 on the opposite side. Are formed. A grounding member 12 is attached to the lower end of the pillar 9, and the ladder 2 is stably grounded on the grounding surface by the grounding member 12. A retaining member 15 is provided at an upper portion, which is an insertion base of the pillar 9, to come into contact with a support frame 18 of the lock mechanism 7, which will be described later, to prevent the pillar 9 from falling out of the pillar body 8 so as to protrude outward from the opening groove 10. Have been.

なお、抜け止め部材１５は、図６に示すようにボルト等の固定具１７で脚部９に着脱自在に固定されている。
踏桟部材６は、角筒状に形成されて、踏桟部材６の上下面は前側から後側にいくにしたがって上方又は下方に移行するように傾斜しており、上面側の傾斜部１６に滑り止め用の凸凹がその長手方向に亘って形成されている。 The retaining member 15 is detachably fixed to the leg 9 with a fixture 17 such as a bolt as shown in FIG.
The step member 6 is formed in a rectangular cylindrical shape, and the upper and lower surfaces of the step member 6 are inclined so as to move upward or downward as going from the front side to the rear side. Anti-slip irregularities are formed over the longitudinal direction.

梯子２の中間部の踏桟部材６（６ｂ）は、支柱本体８の前後壁１３Ｆ，１３Ｒに装着された板状のブラケット１４を介して左右の支柱本体８間で固定されている。
板状のブラケット１４は踏桟部材６の外端部に対応して前後一対ずつ配置されており、各ブラケット１４は、支柱固定部１４ａと踏桟固定部１４ｂとを段部１４ｃを介して有し、支柱固定部１４ａは支柱本体８にリベット等の固定具２２で固定され、踏桟固定部１４ｂは踏桟部材６の外端部にリベット等の固定具２２で固定され、図８に示すように支柱本体８の外側面と踏桟部材６の端部との間に後述する長尺操作部材６９の挿通空間２１が形成されている。 The step member 6 (6b) in the middle part of the ladder 2 is fixed between the left and right column bodies 8 via plate-shaped brackets 14 attached to the front and rear walls 13F, 13R of the column body 8.
A pair of plate-shaped brackets 14 are arranged in front and back corresponding to the outer end of the step member 6, and each bracket 14 has a column fixing part 14a and a step fixing part 14b via a step part 14c. Then, the column fixing portion 14a is fixed to the column main body 8 by a fixing tool 22 such as a rivet, and the step fixing portion 14b is fixed to the outer end of the step member 6 by a fixing tool 22 such as a rivet, as shown in FIG. As described above, the insertion space 21 of the long operation member 69 described later is formed between the outer surface of the column body 8 and the end of the step member 6.

ロック機構７は、梯子２の最下段の踏桟部材６ａと支柱５との間にそれぞれ設けられて、１つの支柱５につき１つのロック機構７が設けられ、左右支柱本体８のそれぞれの対向面にロック機構７が装着されている。
このロック機構７は、支柱本体８に固定の支持フレーム１８と、支持フレーム１８に対して左右方向（図４及び図５のａ方向）に揺動自在に枢支されていて脚柱９の被係止部１１と係合するロック部材２３と、ロック部材２３を揺動自在に支持する枢支軸２４と、枢支軸２４に支持されてロック部材２３を脚柱９から離脱揺動させるハンドル２５と、を有している。 The lock mechanism 7 is provided between the lowermost step member 6 a of the ladder 2 and the support 5, and one lock mechanism 7 is provided for each support 5, and the opposing surfaces of the left and right support main bodies 8 are provided. Is provided with a lock mechanism 7.
The lock mechanism 7 is supported by a support frame 18 fixed to the support body 8, and pivotally supported by the support frame 18 so as to be swingable in the left-right direction (a direction in FIGS. 4 and 5). A lock member 23 that engages with the locking portion 11, a pivot shaft 24 that supports the lock member 23 in a swingable manner, and a handle that is supported by the pivot shaft 24 and that detaches the lock member 23 from the pillar 9 and swings. 25.

ロック部材２３は、後述するように支持フレーム１８に支持された枢支軸２４を中心として左右方向に揺動自在となっており、ロック部材２３の揺動により脚柱９への係脱が自在に行えるようになっている。
また、ロック機構７は、支持フレーム１８に図２、図４及び図５に示すロック位置Ｘとロック解除位置Ｙとに移動自在に支持された連動具２７を有し、ロック部材２３と連動具２７との間に、連動具２７がロック位置Ｘに移動するときにロック部材２３を脚柱９と係合させかつ連動具２７がロック解除位置Ｙに移動するときにロック部材２３を脚柱９から離脱させる連動手段２９と、連動具２７がロック位置Ｘに移動したときにロック部材２３の離脱揺動を阻止しかつ連動具２７がロック位置Ｘから外れたときにロック部材２３の離脱揺動を許容する離脱阻止手段３０と、が設けられている。 The lock member 23 is swingable in the left-right direction about a pivot 24 supported by the support frame 18 as described later, and the swing of the lock member 23 enables the lock member 23 to be freely disengaged from the pillar 9. You can do it.
Further, the lock mechanism 7 has an interlocking member 27 movably supported on the support frame 18 between a lock position X and an unlock position Y shown in FIGS. 2, 4 and 5. When the interlocking tool 27 moves to the lock position X, the lock member 23 is engaged with the pillar 9, and when the interlocking tool 27 moves to the unlock position Y, the lock member 23 is moved to the pillar 9. Interlocking means 29 for disengaging the lock member 23 from the lock position 23 when the interlocking member 27 moves to the lock position X, and preventing the lock member 23 from separating from the lock position X when the interlocking member 27 is disengaged from the lock position X. And a disengagement prevention means 30 that allows

支持フレーム１８は、アルミニウム等の金属系の１枚の板材を屈曲させて箱状に形成され且つ、支柱本体８及び踏桟部材６に装着可能とされたもので、脚柱９側（支柱５側）は開口状となっていて、支柱本体８の前後壁１３Ｆ，１３Ｒに装着され且つ、対向部側に延設された一対の前後側壁部３２Ｆ，３２Ｒと、脚柱９の被係止部１１に対向し且つ、前後側壁部３２Ｆ，３２Ｒの間に配置された背壁部３３と、前後側壁部３２Ｆ，３２Ｒの下部から下方に突出していて踏桟部材６に装着される一対の踏桟装着部３４Ｆ，３４Ｒとを有している。 The support frame 18 is formed by bending a single metal-based plate material such as aluminum into a box shape, and can be attached to the column body 8 and the step member 6. Side) is open, is mounted on the front and rear walls 13F and 13R of the column body 8, and extends between the pair of front and rear side walls 32F and 32R. A back wall portion 33 facing the side wall 11 and disposed between the front and rear side wall portions 32F and 32R, and a pair of step rails projecting downward from the lower portions of the front and rear side wall portions 32F and 32R and attached to the step member 6 It has mounting portions 34F and 34R.

支持フレーム１８の前後側壁部３２Ｆ，３２Ｒの外側部は、支柱本体８の前後壁１３Ｆ，１３Ｒを挟み込み可能に形成されており、前後側壁部３２Ｆ，３２Ｒの外側部で支柱本体８の前後壁１３Ｆ，１３Ｒを挟み込み、リベット等の固定具２２をこれらに打ち付けることによって、支持フレーム１８は支柱本体８に装着されている。
支持フレーム１８の踏桟装着部３４Ｆ，３４Ｒは、踏桟部材６の前後壁２６Ｆ，２６Ｒの端部側を挟み込み可能に形成されており、踏桟装着部３４Ｆ，３４Ｒで踏桟部材６の前後壁２６Ｆ，２６Ｒの端部側を挟み込み、リベット等の固定具２２をこれらに打ち付けることによって支持フレーム１８は踏桟部材６に装着されている。 The outer sides of the front and rear side walls 32F and 32R of the support frame 18 are formed so as to sandwich the front and rear walls 13F and 13R of the support body 8, and the front and rear walls 13F of the support body 8 are formed outside the front and rear side walls 32F and 32R. , 13R, and a fixing tool 22 such as a rivet is struck against them, whereby the support frame 18 is mounted on the support body 8.
The step mounting portions 34F, 34R of the support frame 18 are formed so as to be able to sandwich the end portions of the front and rear walls 26F, 26R of the step member 6, and the front and rear of the step member 6 at the step mounting portions 34F, 34R. The support frame 18 is mounted on the step member 6 by sandwiching the end portions of the walls 26F and 26R and hitting a fixing tool 22 such as a rivet.

したがって、支持フレーム１８は踏桟部材６を支柱５に連結するためのブラケットの機能を有しており、これにより、踏桟部材６を支柱５に装着するためのブラケットの数を少なくすることができる。
支持フレーム１８を踏桟部材６に装着したとき、踏桟部材６の上面側の傾斜部１６は支持フレーム１８内に突入している。支持フレーム１８の背壁部３３は、前後方向の垂直板状に形成されている。 Therefore, the support frame 18 has a function of a bracket for connecting the step member 6 to the column 5, thereby reducing the number of brackets for mounting the step member 6 to the column 5. it can.
When the support frame 18 is mounted on the step member 6, the inclined portion 16 on the upper surface side of the step member 6 protrudes into the support frame 18. The back wall 33 of the support frame 18 is formed in a vertical plate shape in the front-rear direction.

枢支軸２４は円柱状に形成され、支持フレーム１８の前後側壁部３２Ｆ，３２Ｒに貫通状に設けられてロック部材２３の揺動方向と同一方向に回転自在に支持されている。
枢支軸２４の先端部には、後側壁部３２Ｒの枢支軸用貫通孔３６Ｒ（枢支軸用貫通孔３６Ｆ，３６Ｒの一方）よりも大きな径の抜止リング３７が装着されており、枢支軸２４を前方に引いたときにその抜止リング３７が後側壁部３２Ｒに当接してストッパとなり枢支軸２４は枢支部用貫通孔３６Ｒから抜け落ちないようになっている。 The pivot shaft 24 is formed in a columnar shape, is provided in a penetrating manner on the front and rear side wall portions 32F, 32R of the support frame 18, and is rotatably supported in the same direction as the rocking direction of the lock member 23.
A retaining ring 37 having a larger diameter than the pivot shaft through hole 36R (one of the pivot shaft through holes 36F and 36R) of the rear wall portion 32R is attached to the distal end of the pivot shaft 24. When the support shaft 24 is pulled forward, the retaining ring 37 comes into contact with the rear side wall portion 32R and serves as a stopper so that the pivot shaft 24 does not fall out of the through hole 36R for the pivot portion.

図３，図４，図５，図９に示すように、ハンドル２５は、把持部４１と、把持部４１から連動具２７側に突出した作動部４２とを備え、把持部４１は枢支軸２４の一端部（前端部）に溶接等により固着され、前側壁部３２Ｆの外面に沿って配置され、枢支軸２４と作動部４２との前部側を連結している。作動部４２は円柱状に形成され、枢支軸２４とは径方向に離れた位置で後方向に突出している。枢支軸２４と把持部４１と作動部４２とで側面視略コの字形に形成されている。 As shown in FIGS. 3, 4, 5, and 9, the handle 25 includes a grip portion 41 and an operating portion 42 protruding from the grip portion 41 toward the interlocking tool 27. 24 is fixed to one end (front end) by welding or the like, is arranged along the outer surface of the front side wall portion 32F, and connects the front side of the pivot shaft 24 and the operating portion 42. The operating portion 42 is formed in a columnar shape, and protrudes rearward at a position radially away from the pivot 24. The pivot shaft 24, the grip portion 41, and the operation portion 42 are formed in a substantially U-shape in a side view.

ハンドル２５の作動部４２は、支持フレーム１８の前壁部３２Ｆの下部に設けられた作動部用貫通孔４４に挿通されている。作動部用貫通孔４４は、枢支軸２４の軸心を中心（枢支軸用貫通孔３６Ｆ，３６Ｒの中心）とする円弧形状に形成されている。
ハンドル２５の把持部４１は、枢支軸２４及び作動部４２を一体的に連結している。把持部４１と枢支軸２４の前部と作動部４２の前部に合成樹脂製のハンドルカバー４７が外嵌装着され、ハンドルカバー４７は把持部４１と枢支軸２４の前部と作動部４２の前部との外周を覆っている。ハンドルカバー４７の下部に左右小幅のつまみ４８が下方に突設されている。 The operating portion 42 of the handle 25 is inserted into an operating portion through hole 44 provided below the front wall 32F of the support frame 18. The operating portion through hole 44 is formed in an arc shape with the axis of the pivot shaft 24 as the center (the center of the pivot shaft through holes 36F and 36R).
The grip 41 of the handle 25 integrally connects the pivot 24 and the operating part 42. A handle cover 47 made of synthetic resin is externally fitted to the grip portion 41, the front portion of the pivot shaft 24, and the front portion of the operating portion 42, and the handle cover 47 is connected to the grip portion 41, the front portion of the pivot shaft 24, and the operating portion. 42 covers the outer periphery with the front part. Left and right small width knobs 48 are protruded downward from the lower portion of the handle cover 47.

ロック部材２３は、支持フレーム１８の前後壁部３２Ｆ，３２Ｒ間に配置され、枢支軸２４の前後略中央部に装着される枢支軸用装着部４９と、作動部４２の外側方に配置される揺動突部５１と、脚柱９の被係止部１１に係合する係止部５２とを有している。
ロック部材２３の枢支軸用装着部４９は枢支軸２４に回動自在に外嵌されており、ロック部材２３は枢支軸２４廻りに左右方向（ａ方向）に揺動自在に支持されている。ロック部材２３の下部（遊端側）に連動具２７に向けて押圧部５４が突設され、枢支軸用装着部４９に操作片５５が内側方に突設されている。 The lock member 23 is disposed between the front and rear wall portions 32F and 32R of the support frame 18, and is mounted on a pivot support shaft mounting portion 49 which is mounted substantially at the front and rear center portions of the support shaft 24, and on the outer side of the operation portion 42. And a locking portion 52 that engages with the locked portion 11 of the pillar 9.
The pivot shaft mounting portion 49 of the lock member 23 is rotatably fitted to the pivot shaft 24 so as to be rotatable. The lock member 23 is supported around the pivot shaft 24 so as to be swingable in the left-right direction (a direction). ing. A pressing portion 54 protrudes from the lower portion (the free end side) of the lock member 23 toward the interlocking member 27, and an operation piece 55 protrudes inward from the mounting portion 49 for the pivot shaft.

図４，図５，図１０に示すように、前記連動具２７は、前後一対の側壁２７ａと前後側壁２７ａの上部を連結する上壁２７ｂと前後側壁２７ａの左右方向内端部を連結する背壁２７ｃとを有する外側方が開口した箱形に形成され、支持フレーム１８内のロック部材２３の左右方向の内方側に上方突出状に配置され、支持フレーム１８の背壁部３３の内面に沿って上下摺動（移動）自在に保持されている。従って、左右支持フレーム１８の連動具２７は左右の支柱本体８の対向面に沿ってそれぞれその長手方向に移動自在に保持されている。 As shown in FIGS. 4, 5, and 10, the interlocking tool 27 includes a pair of front and rear side walls 27a and an upper wall 27b connecting the upper portions of the front and rear side walls 27a and a back connecting the left and right inner ends of the front and rear side walls 27a. It is formed in a box shape having an outside opening having a wall 27c, and is disposed so as to protrude upward on the inward side of the lock member 23 in the support frame 18 in the left-right direction. It is held slidably (movable) up and down along. Therefore, the interlocking members 27 of the left and right support frames 18 are held movably in the longitudinal direction along the opposing surfaces of the left and right support columns 8 respectively.

連動具２７の背壁２７ｃの上部に角筒体５７が外側方に突設されおり、角筒体５７の上部が第１押動片５８とされ、下部が第２押動片５９とされ、第１押動片５８と第２押動片５９とは操作片５５の先端部を上下に挟んだ状態で上下に離間している。背壁２７ｃの角筒体５７の下方に規制部６０が外側方に突設され、規制部６０の前後両側に円弧状のカム面６１ａを有する前後一対のカム壁６１が設けられている。 A rectangular cylindrical body 57 projects outward from an upper part of the back wall 27c of the interlocking member 27, an upper part of the rectangular cylindrical body 57 is a first pushing piece 58, and a lower part thereof is a second pushing piece 59, The first pushing piece 58 and the second pushing piece 59 are vertically separated from each other with the tip of the operation piece 55 sandwiched vertically. A regulating portion 60 projects outwardly below the rectangular cylindrical body 57 of the back wall 27c, and a pair of front and rear cam walls 61 having arcuate cam surfaces 61a are provided on both front and rear sides of the regulating portion 60.

連動具２７の上壁２７ｂに前後一対の連結片６２が上方突設され、各連結片６２には取付孔６３が設けられている。
而して、前記連動手段２９は、ロック部材２３に突設した操作片５５と、連動具２７に突設した第１押動片５８及び第２押動片５９とを備え、第１押動片５８及と第２押動片５９とは操作片５５を連動具２７の移動方向に挟んでおり、連動具２７がロック位置Ｘに移動するときにロック部材２３を係合方向に揺動させるべく第１押動片５８が操作片５５を押動し、連動具２７がロック解除位置Ｙに移動するときにロック部材２３を離脱方向に揺動させるべく第２押動片５９が操作片５５を押動するように構成されている。 A pair of front and rear connecting pieces 62 project upward from the upper wall 27b of the interlocking tool 27, and each connecting piece 62 is provided with a mounting hole 63.
Thus, the interlocking means 29 includes an operation piece 55 protruding from the lock member 23 and a first pressing piece 58 and a second pressing piece 59 protruding from the interlocking tool 27, and the first pressing The piece 58 and the second pressing piece 59 sandwich the operation piece 55 in the moving direction of the interlocking tool 27, and swing the lock member 23 in the engaging direction when the interlocking tool 27 moves to the lock position X. The first pushing piece 58 pushes the operating piece 55 to move the lock member 23 in the release direction when the interlocking tool 27 moves to the unlock position Y so that the operating piece 55 is moved. Is configured to be pushed.

なお、本実施形態の場合、連動具２７がロック解除位置Ｙからロック位置Ｘに移動するとき、まず、規制部６０が押圧部５４を下方に押動して、ロック部材２３を係合方向に揺動させ、その後に、第１押動片５８が操作片５５を下方に押動するようになり、連動具２７がロック位置Ｘに移動したときに、ロック部材２３の係合方向への揺動が完了するようになっている。 In the case of the present embodiment, when the interlocking tool 27 moves from the lock release position Y to the lock position X, first, the restricting portion 60 pushes the pressing portion 54 downward to move the lock member 23 in the engaging direction. After that, the first pushing piece 58 pushes the operating piece 55 downward, and when the interlocking tool 27 moves to the lock position X, the lock member 23 swings in the engagement direction. The movement is completed.

また、前記離脱阻止手段３０は、ロック部材２３の揺動端部側に連動具２７に向けて突設した押圧部５４と、連動具２７に押圧部５４に向けて突設した規制部６０とを備え、連動具２７がロック位置Ｘに移動したときに、押圧部５４と規制部６０とが対向して、ロック部材２３の離脱揺動を阻止し、連動具２７がロック位置Ｘから外れたときに規制部６０が押圧部５４対向位置から外れて、ロック部材２３の離脱揺動を許容するように構成されている。 The detachment preventing means 30 includes a pressing portion 54 protruding toward the interlocking tool 27 on the swinging end side of the lock member 23, and a restricting portion 60 protruding from the interlocking device 27 toward the pressing portion 54. When the interlocking tool 27 moves to the lock position X, the pressing portion 54 and the restricting portion 60 face each other to prevent the locking member 23 from swinging away, and the interlocking tool 27 comes off the lock position X. At this time, the restricting portion 60 is displaced from the position facing the pressing portion 54, and is configured to allow the lock member 23 to separate and swing.

また、連動具２７がロック位置Ｘからロック解除位置Ｙに移動するときに、規制部６０が押圧部５４に対して外れた後にロック部材２３の離脱揺動が開始されるように、図４に示す如く第２押動片５９と操作片５５との間にアイドル間隙６５が形成されている。
ハンドル２５を枢支軸２４廻りに矢印ａ方向の左右内方に回動操作することにより、連動具２７を後述の付勢部材９１の付勢に抗してロック解除位置Ｙに押動する連動具押動手段６７が把持部４１と連動具２７との間に設けられている。この連動具押動手段６７は、作動部４２の外周面と連動具２７の前後カム壁６１のカム面６１ａとで構成されている。 Also, when the interlocking tool 27 moves from the lock position X to the lock release position Y, the detachment swinging of the lock member 23 is started after the restricting portion 60 is disengaged from the pressing portion 54, as shown in FIG. As shown, an idle gap 65 is formed between the second pushing piece 59 and the operation piece 55.
By rotating the handle 25 inward and rightward in the direction of arrow a about the pivot shaft 24, the interlocking tool 27 is pushed to the unlock position Y against the urging of the urging member 91 described later. A tool pushing means 67 is provided between the grip part 41 and the interlocking tool 27. The interlocking device pushing means 67 is constituted by the outer peripheral surface of the operating portion 42 and the cam surface 61 a of the front and rear cam wall 61 of the interlocking device 27.

図２，図３，図６，図８，図１０に示すように、ロック部材２３を操作するための長尺操作部材６９が支柱本体８の外面に開口溝１０を塞ぐように配置されている。この長尺操作部材６９は支柱本体８の外面に沿って長手方向に移動自在に保持されると共に、前記挿通空間２１に上下移動自在に挿通保持されている。長尺操作部材６９の下端部（一端部）に後述の連結体８２を介して連動具２７が連結され、長尺操作部材６９の上端部（他端部）に操作部７０が設けられている。 As shown in FIGS. 2, 3, 6, 8, and 10, a long operation member 69 for operating the lock member 23 is arranged on the outer surface of the column body 8 so as to close the opening groove 10. . The long operation member 69 is movably held in the longitudinal direction along the outer surface of the column body 8, and is inserted and held in the insertion space 21 so as to be vertically movable. The interlocking tool 27 is connected to a lower end (one end) of the long operation member 69 via a connecting body 82 described later, and an operation unit 70 is provided at an upper end (the other end) of the long operation member 69. .

長尺操作部材６９は、上下方向に長い板状の操作壁部６９ａと、操作壁部６９ａの前後両端部から外側方に突出した前後一対の側壁部６９ｂとを有し、操作壁部６９ａの下部に上係止孔７１と下係止孔７２とが上下に間隔をおいて設けられ、これら係止孔７１，７２は前後に長い長方形状に形成されている。
操作部７０は、長尺操作部材６９とは別体に形成されており、長尺操作部材６９の外面に沿うように配置される取付壁７０ａと、取付壁７０ａの上部から外側方に屈曲して長尺操作部材６９の上端面上に配置された天壁７０ｂとを備え、取付壁７０ａがリベット等の固定具２２で長尺操作部材６９に固着され、天壁７０ｂの外側端部から上方に向けて指掛け片７４が鈎形に突設されている。 The long operation member 69 has a vertically long plate-shaped operation wall portion 69a, and a pair of front and rear side wall portions 69b protruding outward from both front and rear end portions of the operation wall portion 69a. An upper locking hole 71 and a lower locking hole 72 are provided at a lower portion at an upper and lower interval, and these locking holes 71 and 72 are formed in a rectangular shape which is long in front and rear.
The operation unit 70 is formed separately from the long operation member 69, and is provided with a mounting wall 70a arranged along the outer surface of the long operation member 69, and bent outward from an upper portion of the mounting wall 70a. And a top wall 70b disposed on the upper end surface of the long operation member 69, and the mounting wall 70a is fixed to the long operation member 69 with a fixing tool 22 such as a rivet, and the mounting wall 70a extends upward from the outer end of the top wall 70b. A finger-hanging piece 74 protrudes in a hook shape.

支柱本体８に、前記長尺操作部材６９を移動自在に案内する上ガイド部材７６と下ガイド部材７７とが設けられている。
図２，図３，図６に示すように、上ガイド部材７６は、前後一対の側壁７６ａと、前後側壁７６ａの上部の左右内端部に連結された垂直板状の背壁７６ｂと、背壁７６ｂの下部から外側方下がりに傾斜しかつ前後側壁７６ａに連結された傾斜壁７６ｃと、傾斜壁７６ｃの下部から上方に起立しかつ前後側壁７６ａに連結された垂直板状の支持壁７６ｄとを有し、前後側壁７６ａがリベット等の固定具２２を打ち付けることによって支柱本体８の前後側壁１３Ｆ，１３Ｒに固着され、支持壁７６ｄと支柱本体８の外面との間に長尺操作部材６９の上部が上下移動自在に保持されている。なお、傾斜壁７６ｃの下部に雨水を排出するための排出孔が設けられている。 An upper guide member 76 and a lower guide member 77 for movably guiding the long operation member 69 are provided on the support body 8.
As shown in FIGS. 2, 3, and 6, the upper guide member 76 includes a pair of front and rear side walls 76a, a vertical plate-shaped back wall 76b connected to upper left and right inner ends of the front and rear side walls 76a, An inclined wall 76c inclined downward and outward from the lower part of the wall 76b and connected to the front and rear side walls 76a, and a vertical plate-shaped support wall 76d rising upward from the lower part of the inclined wall 76c and connected to the front and rear side walls 76a. The front and rear side walls 76a are fixed to the front and rear side walls 13F and 13R of the support body 8 by hitting the fixing tool 22 such as a rivet, and the long operation member 69 is provided between the support wall 76d and the outer surface of the support body 8. The upper part is held movably up and down. A drain hole for discharging rainwater is provided below the inclined wall 76c.

図２，図３，図１０に示すように、下ガイド部材７７は、前後一対の側壁７７ａと、前後側壁７７ａの内側端部を連結した背壁７７ｂと、背壁７７ｂから内側方に突出した前後一対の収納側壁７７ｃと、収納側壁７７ｃの上部間を閉塞するように背壁７７ｂの上部から内側方に突出した上バネ受け壁７９とを有している。
前記前後側壁７７ａの左右方向の中途部に段部８０が設けられ、段部８０よりも内側方に係合片８１が前後方向内方に突設されており、前後側壁７７ａの外側部がリベット等の固定具２２を打ち付けることによって支柱本体８の前後側壁１３Ｆ，１３Ｒに固着され、段部８０と係合片８１との間で、長尺操作部材６９の前後両端部を上下方向移動自在に挟持している。 As shown in FIGS. 2, 3, and 10, the lower guide member 77 projects inward from the pair of front and rear side walls 77a, a back wall 77b connecting the inner ends of the front and rear side walls 77a, and the back wall 77b. It has a pair of front and rear storage side walls 77c, and an upper spring receiving wall 79 projecting inward from the upper part of the back wall 77b so as to close the upper part of the storage side wall 77c.
A step portion 80 is provided at a middle portion in the left-right direction of the front and rear side wall 77a, and an engagement piece 81 is provided inwardly of the step portion 80 to protrude inward in the front and rear direction. Is fixed to the front and rear side walls 13F and 13R of the column main body 8 by striking the fixing tool 22 or the like, and the front and rear ends of the long operation member 69 can be vertically moved between the stepped portion 80 and the engagement piece 81. It is pinched.

図２，図３，図４，図５，図１０に示すように、前記連動具２７と長尺操作部材６９の一端部との間に連結体８２が設けられている。連結体８２は、左右に前壁８２ａと背壁８２ｂとを有し、背壁８２ｂは前壁８２ａよりも上方に突出しており、背壁８２ｂの上部から内側方に上壁８２ｃが突設され、上壁８２ｃの外側部に上方及び外側方に階段状に屈曲した上係合片８３が突設されている。背壁８２ｂの下部と前壁８２ａの下部とを連結する底壁８２ｄが設けられ、背壁８２ｂと底壁８２ｄとの間に円筒状の連結筒８５が設けられ、前壁８２ａの上部と背壁８２ｂの中間部とを連結する下バネ受け壁８６が設けられ、前壁８２ａと背壁８２ｂと底壁８２ｄと下バネ受け壁８６との前後中央部を連結する連結壁８２ｅが設けられ、前壁８２ａの上部から外側方に下係合片８４が鈎形に突設されている。 As shown in FIGS. 2, 3, 4, 5, and 10, a connecting body 82 is provided between the interlocking tool 27 and one end of the long operation member 69. The connecting body 82 has a front wall 82a and a back wall 82b on the left and right, the back wall 82b protrudes above the front wall 82a, and an upper wall 82c protrudes inward from an upper portion of the back wall 82b. An upper engaging piece 83 is provided on an outer portion of the upper wall 82c so as to protrude upward and outward in a stepwise manner. A bottom wall 82d is provided for connecting a lower portion of the back wall 82b and a lower portion of the front wall 82a, and a cylindrical connecting tube 85 is provided between the back wall 82b and the bottom wall 82d. A lower spring receiving wall 86 that connects the middle portion of the wall 82b is provided, and a connecting wall 82e that connects the front and rear central portions of the front wall 82a, the back wall 82b, the bottom wall 82d, and the lower spring receiving wall 86 is provided, A lower engagement piece 84 protrudes in a hook shape outward from the upper portion of the front wall 82a.

上係合片８３を長尺操作部材６９の上係止孔７１に係脱自在に係合すると共に、下係合片８４を下係止孔７２に係脱自在に係合することにより、連結体８２は長尺操作部材６９の下部に下方突出状でかつ着脱自在に連結固着されている。
連結体８２は底壁８２ｄを介して連動具２７の上壁２７ｂに載置され、ボルトナット等の締付具８８を前後の連結片６２と連結筒８５とに挿通して締め付けることにより、連結体８２は連動具２７に着脱自在に連結されている。 The upper engagement piece 83 is removably engaged with the upper locking hole 71 of the long operation member 69, and the lower engagement piece 84 is removably engaged with the lower locking hole 72, thereby connecting the upper and lower engagement pieces. The body 82 is connected to and fixed to the lower part of the long operation member 69 so as to protrude downward and to be detachable.
The connecting body 82 is placed on the upper wall 27b of the interlocking tool 27 via the bottom wall 82d, and is tightened by inserting a fastening tool 88 such as a bolt and nut into the front and rear connecting pieces 62 and the connecting cylinder 85 and tightening. The body 82 is detachably connected to the interlock 27.

而して、連結体８２の背壁８２ｂの上半分と下バネ受け壁８６と下ガイド部材７７の前後収納側壁７７ｃと上バネ受け壁７９とによって、バネ収納ケース８９が形成されている。
このバネ収納ケース８９内にコイルバネ９０を上下方向に収納し、コイルバネ９０の上端を上バネ受け壁７９で受け、コイルバネ９０の下端を下バネ受け壁８６で受けて、コイルバネ９０によって下ガイド部材７７に対して連結体８２乃至連動具２７を下方に付勢している。従って、コイルバネ９０により構成した付勢部材９１によって連動具２７をロック位置Ｘに付勢するようになっている。 Thus, a spring housing case 89 is formed by the upper half of the back wall 82 b of the connecting body 82, the lower spring receiving wall 86, the front and rear storage side walls 77 c of the lower guide member 77, and the upper spring receiving wall 79.
The coil spring 90 is housed vertically in the spring housing case 89, the upper end of the coil spring 90 is received by the upper spring receiving wall 79, the lower end of the coil spring 90 is received by the lower spring receiving wall 86, and the lower guide member 77 is received by the coil spring 90. The connector 82 or the interlocking member 27 is urged downward. Therefore, the interlocking device 27 is urged to the lock position X by the urging member 91 constituted by the coil spring 90.

また、上係合片８３及び下係合片８４を上係止孔７１又は下係止孔７２から外して連結体８２を長尺操作部材６９から取り外し、締付具８８を外して連結体８２を連動具２７から取り外すことにより、連結体８２を長尺操作部材６９と連動具２７との間から退避させて開口溝１０を開放することができるようになっている。
また、連結体８２を長尺操作部材６９から取り外し、締付具８８を緩めて、連結体８２を締付具８８廻りに内側方に回動することによっても、連結体８２を長尺操作部材６９と連動具２７との間から退避させて開口溝１０を開放できるようになっている。 Also, the upper engaging piece 83 and the lower engaging piece 84 are removed from the upper locking hole 71 or the lower locking hole 72, the connecting body 82 is removed from the long operating member 69, and the fastener 88 is removed to remove the connecting body 82. By removing from the interlocking tool 27, the connecting body 82 can be retracted from between the long operating member 69 and the interlocking tool 27 to open the opening groove 10.
Alternatively, by removing the connecting member 82 from the long operating member 69, loosening the fastener 88, and rotating the connecting member 82 inward around the fastener 88, the connecting member 82 can be removed from the long operating member 69. The opening groove 10 can be opened by being retracted from between 69 and the interlocking member 27.

その結果、開口溝１０より工具を挿入して、脚柱９の上部に取り付けた抜け止め部材１５を取り外すことができ、これにより、破損した脚柱９を支柱本体８から取り出して交換したり修理したりすることができる。
前記実施形態によれば、図４に示すように、ロック部材２３が脚柱９の被係止部１１に係合し、脚柱９が支柱本体８に対して移動不能にロックされた状態で、支柱５を伸縮調整する場合、操作部７０の指掛け片７４に指を引っ掛けて長尺操作部材６９を上方に引っ張ると、連動具２７が付勢部材９１の付勢に抗してロック位置Ｘからロック解除位置Ｙに移動する。又は、ハンドルカバー４７のつまみ４８を摘んで、ハンドル２５を枢支軸２４廻りに矢印ａ方向の左右内方に揺動操作すると、作動部４２がカム面６１ａを上方に押して連動具２７が付勢部材９１の付勢に抗してロック位置Ｘからロック解除位置Ｙに移動する。 As a result, it is possible to remove the retaining member 15 attached to the upper part of the pillar 9 by inserting a tool through the opening groove 10, thereby taking out the damaged pillar 9 from the pillar main body 8 to replace or repair it. Or you can.
According to the embodiment, as shown in FIG. 4, in a state where the lock member 23 is engaged with the locked portion 11 of the pillar 9 and the pillar 9 is locked immovably with respect to the support body 8. In the case of adjusting the length of the support column 5, when the finger is hooked on the finger hook 74 of the operation unit 70 and the long operation member 69 is pulled upward, the interlocking tool 27 is locked at the lock position X against the urging of the urging member 91. To the unlock position Y. Alternatively, by gripping the knob 48 of the handle cover 47 and swinging the handle 25 inward and rightward in the direction of arrow a around the pivot shaft 24, the operating portion 42 pushes the cam surface 61a upward to attach the interlocking member 27. It moves from the lock position X to the unlock position Y against the urging of the urging member 91.

そして、連動具２７がロック位置Ｘからロック解除位置Ｙに移動するときに、第２押動片５９と操作片５５との間にアイドル間隙６５があるため、まず、連動具２７の上方移動によって規制部６０が押圧部５４対向位置から外れ、離脱阻止手段３０によるロック部材２３の離脱阻止が解除されて、ロック部材２３の離脱揺動が可能になる。その後に、第２押動片５９が操作片５５を上方に押動し、ロック部材２３の離脱揺動が開始され、ロック部材２３が離脱方向に揺動する。連動具２７がロック解除位置Ｙに移動したとき、ロック部材２３の脚柱９の被係止部１１からの離脱が完了する。その結果、脚柱９が支柱本体８に対して移動可能になり、支柱５を伸縮することができる。 When the interlocking tool 27 moves from the lock position X to the unlocking position Y, there is an idle gap 65 between the second pushing piece 59 and the operation piece 55. The restricting portion 60 is disengaged from the position opposing the pressing portion 54, and the lock-off prevention of the lock member 23 by the lock-off prevention means 30 is released, so that the lock member 23 can be rocked. Thereafter, the second pushing piece 59 pushes the operation piece 55 upward, the detachment swinging of the lock member 23 starts, and the lock member 23 swings in the detaching direction. When the interlocking tool 27 moves to the unlock position Y, the detachment of the lock member 23 from the locked portion 11 of the pillar 9 is completed. As a result, the pillar 9 becomes movable with respect to the pillar main body 8, and the pillar 5 can be expanded and contracted.

支柱５を伸縮させた後、脚柱９を支柱本体８に対して移動不能にロックするには、長尺操作部材６９の上方への引っ張りを解除し、又は、ハンドル２５の揺動操作を解除すると、付勢部材９１の付勢によって、長尺操作部材６９乃至連動具２７が下方に移動し、連動具２７がロック解除位置Ｙからロック位置Ｘに移動する。
連動具２７がロック解除位置Ｙからロック位置Ｘに移動するとき、まず、規制部６０が押圧部５４を下方に押動して、ロック部材２３を係合方向に揺動させる。その後、第１押動片５８が操作片５５を下方に押動するようになり、連動具２７がロック位置Ｘに移動したときに、ロック部材２３の係合方向への揺動が完了する。 In order to lock the leg 9 immovably with respect to the column main body 8 after the column 5 is expanded and contracted, the upward operation of the long operation member 69 is released or the swing operation of the handle 25 is released. Then, by the urging of the urging member 91, the long operation member 69 to the interlocking tool 27 move downward, and the interlocking tool 27 moves from the lock release position Y to the lock position X.
When the interlocking tool 27 moves from the lock release position Y to the lock position X, first, the restricting portion 60 pushes the pressing portion 54 downward to swing the lock member 23 in the engaging direction. Thereafter, the first pushing piece 58 pushes the operation piece 55 downward, and when the interlocking tool 27 moves to the lock position X, the swing of the lock member 23 in the engagement direction is completed.

また、連動具２７がロック位置Ｘに移動したときに、押圧部５４と規制部６０とが対向し、離脱阻止手段３０がロック部材２３の離脱方向への揺動を阻止する。その結果、ロック部材２３が脚柱９の被係止部１１に係合し、これにより脚柱９が支柱本体８に対して移動不能にロックされる。しかも、離脱阻止手段３０がロック部材２３の離脱方向への揺動を阻止し、脚柱９が支柱本体８に対して不測に伸縮移動するのを確実に防ぐことができる。 When the interlocking tool 27 moves to the lock position X, the pressing portion 54 and the restricting portion 60 face each other, and the detachment preventing means 30 prevents the lock member 23 from swinging in the detaching direction. As a result, the locking member 23 engages with the locked portion 11 of the pillar 9, thereby locking the pillar 9 immovably with respect to the support body 8. In addition, the detachment preventing means 30 prevents the lock member 23 from swinging in the detaching direction, so that the pillar 9 can be reliably prevented from unexpectedly expanding and contracting with respect to the support body 8.

従って、連動具２７がロック位置Ｘに移動したときに連動手段２９によりロック部材２３を脚柱９と係合させ、このとき同時に離脱阻止手段３０によってロック部材２３の脚柱９への係合が不測に外れるのを防止することができる。しかも、連動具２７がロック位置Ｘから外れると、離脱阻止手段３０がロック部材２３の離脱揺動を許容し、連動具２７のロック位置Ｘ乃至ロック解除位置Ｙへの移動によって、ロック部材２３の脚柱９への係合と脚柱９からの離脱とを簡単に変更操作することができ、伸縮調整の操作を簡単になし得る。 Accordingly, when the interlocking member 27 moves to the lock position X, the lock member 23 is engaged with the pillar 9 by the interlocking means 29, and at the same time, the engagement of the lock member 23 with the pillar 9 by the detachment preventing means 30 is performed. It is possible to prevent accidental detachment. In addition, when the interlocking tool 27 deviates from the lock position X, the detachment preventing means 30 allows the lock member 23 to separate and swing, and by moving the interlocking tool 27 from the lock position X to the unlock position Y, the lock member 23 is released. The engagement with the pillar 9 and the detachment from the pillar 9 can be easily changed, and the operation of expansion and contraction can be easily performed.

また、長尺操作部材６９が支柱本体８の外面に沿って配置されるため、ロック機構７や長尺操作部材６９が脚立１の使用の邪魔になることもなくなる。しかも、ロック機構７や長尺操作部材６９が脚柱９の外部に配置されるため、脚柱９を筒体で構成することができて強度的に有利になる。また、長尺操作部材６９を使用して、ロック機構７から離れた箇所からロック部材２３の脚柱９への係合と脚柱９から離脱を簡単に操作することが可能になる。 In addition, since the long operation member 69 is arranged along the outer surface of the column main body 8, the lock mechanism 7 and the long operation member 69 do not obstruct the use of the stepladder 1. In addition, since the lock mechanism 7 and the long operation member 69 are arranged outside the pillar 9, the pillar 9 can be formed of a cylindrical body, which is advantageous in strength. Further, by using the long operation member 69, it is possible to easily operate the engagement of the lock member 23 with the pillar 9 and the detachment from the pillar 9 from a place away from the lock mechanism 7.

なお、本実施形態にかかる発明は、上記実施の形態に限定されるものではない。上記の実施の形態では、伸縮装置を伸縮可能な支柱５を有する脚立１に適用したが、これに代え、伸縮装置を梯子２や足場台等に適用しても良い。
また、伸縮体は支柱本体８と脚柱９とで構成される支柱５に限定されず、伸縮体は筒状の部材内に脚柱９が挿入されて全体として伸縮する部材であればよい。 The invention according to the present embodiment is not limited to the above embodiment. In the above-described embodiment, the telescopic device is applied to the stepladder 1 having the telescopic strut 5, but the telescopic device may be applied to the ladder 2, the scaffold, or the like instead.
In addition, the elastic body is not limited to the column 5 composed of the column main body 8 and the column 9, and the elastic body may be any member that can be expanded and contracted as a whole by inserting the column 9 into a cylindrical member.

また、前記実施形態では、連動具２７がロック解除位置Ｙからロック位置Ｘに移動するとき、まず、規制部６０が押圧部５４を下方に押動して、ロック部材２３を係合方向に揺動させ、その後、第１押動片５８が操作片５５を下方に押動するようになっているが、これに代え、連動具２７がロック解除位置Ｙからロック位置Ｘに移動するとき、第１押動片５８が操作片５５を下方に押動することによってのみ、ロック部材２３が係合方向へ揺動するようにしてもよい。 Further, in the embodiment, when the interlocking tool 27 moves from the lock release position Y to the lock position X, first, the restricting portion 60 pushes the pressing portion 54 downward to swing the lock member 23 in the engaging direction. After that, the first pushing piece 58 pushes the operating piece 55 downward. Alternatively, when the interlocking tool 27 moves from the unlocked position Y to the locked position X, The lock member 23 may swing in the engagement direction only when the one pushing piece 58 pushes the operation piece 55 downward.

１脚立（伸縮装置）
２梯子
５支柱（伸縮体）
６踏桟部材
７ロック機構
８支柱本体（外套体）
９脚柱（挿入体）
１０開口溝
１１被係止部
１５抜け止め部材
１８支持フレーム
２１挿通空間
２３ロック部材
２４枢支軸
２５ハンドル
２７連動具
２９連動手段
３０離脱阻止手段
４１把持部
４２作動部
５４押圧部
５５操作片
５８第１押動片
５９第２押動片
６０規制部
６５アイドル間隙
６７連動具押動手段
６９長尺操作部材
７０操作部
７７下ガイド部材
８２連結体
９０コイルバネ
９１付勢部材 1 stepladder (telescopic device)
2 ladder 5 prop (elastic body)
6 Stepping member 7 Locking mechanism 8 Main body of column (outer body)
9 Pillar (insert)
10 Opening groove 11 Locked part
15 Retaining member 18 Support frame 21 Insertion space 23 Lock member 24 Pivot shaft 25 Handle 27 Interlocking tool 29 Interlocking means 30 Detachment preventing means 41 Gripping part 42 Operating part 54 Pressing part 55 Operation piece 58 First pressing piece 59 Second Pushing piece 60 Restriction section 65 Idle gap 67 Interlocking tool pushing means 69 Long operating member 70 Operating section 77 Lower guide member 82 Connecting body 90 Coil spring 91 Biasing member

Claims

A pair of telescoping bodies (5) having a pair of mantle bodies (8) arranged opposite to each other and an insert body (9) which is telescopically inserted into each mantle body (8) and whose lower end can be grounded;
A plurality of upper and lower steps (6) having longitudinal ends oppositely connected to opposing surfaces of a mantle (8) of a pair of elastic bodies (5);
It is arranged on the opposing surface of each mantle (8) and near the connecting position with the lower step member (6), and at the position where the insert (9) inserted into the mantle (8) is expanded and contracted. A lock mechanism (7) fixed to the mantle (8) ;
A length extending from the lock mechanism (7) to the vicinity of the upper step member (6) along the opposing surface of each mantle (8), and a lock and unlock operation of each lock mechanism (7). And a scale operating member (69).
Each of the lock mechanisms (7) is supported on a support frame (18) fixed to the mantle (8), and is pivotally supported on the support frame (18) so as to be locked by the insert (9). A locking member (23) that engages with the portion (11);
An interlocking tool (27) connected to the lower end of the long operation member (69 ) and movably supported at the lock position (X) and the unlock position (Y) on the support frame (18); The lock member (23) is engaged with the insert (9) when the interlock (27) moves to the lock position (X), and locked when the interlock (27) moves to the unlock position (Y). Interlocking means (29) for detaching the member (23) from the insert (9) is provided;
When the interlocking tool (27) moves to the lock position (X), the lock member (23) is prevented from disengaging and swinging, and when the interlocking tool (27) deviates from the lock position (X), the lock member (23). A departure preventing means (30 ) for allowing the departure swing of the
The interlocking means (29) includes an operating piece (55) protruding from a lock member (23) pushed by the movement of the interlocking tool (27) and a moving direction of the operating piece (55). A first pushing piece (58) and a second pushing piece (59) projecting from the interlock (27) so that the interlock (27) moves to the lock position (X). When the first pushing piece (58) pushes the operating piece (55) to swing the locking member (23) in the engagement direction, and the interlock (27) moves to the unlocking position (Y). The second pushing piece (59) is configured to push the operation piece (55) so as to swing the lock member (23) in the detaching direction,
The detachment preventing means (30) includes a pressing portion (54) protruding toward the interlocking tool (27) on the swing end side of the lock member (23), and a pressing portion (54) on the interlocking tool (27). When the interlocking device (27) moves to the lock position (X), the pressing portion (54) and the restricting portion (60) are opposed to each other, and the interlocking device is provided. The restricting portion (60) is configured to be disengaged from the position opposing the pressing portion (54) when the (27) is disengaged from the lock position (X),
When the interlocking tool (27) moves from the lock position (X) to the unlock position (Y), the locking member (23) is disengaged and oscillated after the restricting portion (60) is disengaged from the pressing portion (54). A telescopic device, characterized in that an idle gap (65) is formed between the second pushing piece (59) and the operating piece (55) so that the operation is started .

A pair of telescoping bodies (5) having a pair of mantle bodies (8) arranged opposite to each other and an insert body (9) which is telescopically inserted into each mantle body (8) and whose lower end can be grounded;
A plurality of upper and lower steps (6) having longitudinal ends oppositely connected to opposing surfaces of a mantle (8) of a pair of elastic bodies (5);
It is arranged on the opposing surface of each mantle (8) and near the connecting position with the lower step member (6), and at the position where the insert (9) inserted into the mantle (8) is expanded and contracted. A lock mechanism (7) fixed to the mantle (8);
A length extending from the lock mechanism (7) to the vicinity of the upper step member (6) along the opposing surface of each mantle (8), and a lock and unlock operation of each lock mechanism (7). And a scale operating member (69).
Each of the lock mechanisms (7) is supported on a support frame (18) fixed to the mantle (8), and is pivotally supported on the support frame (18) so as to be locked by the insert (9). A locking member (23) that engages with the portion (11);
An interlocking tool (27) connected to the lower end of the long operation member (69) and movably supported at the lock position (X) and the unlock position (Y) on the support frame (18); The lock member (23) is engaged with the insert (9) when the interlock (27) moves to the lock position (X), and locked when the interlock (27) moves to the unlock position (Y). Interlocking means (29) for detaching the member (23) from the insert (9) is provided;
When the interlocking tool (27) moves to the lock position (X), the lock member (23) is prevented from disengaging and swinging, and when the interlocking tool (27) deviates from the lock position (X), the lock member (23). A departure preventing means (30) for allowing the departure swing of the
An urging member (91) for urging the interlock (27) to the lock position (X) is provided, and the lock mechanism (7) is provided with a pivot shaft (24) for swingably supporting the lock member (23). ) And a handle (25) supported on a pivot (24),
The handle (25) has a grip portion (41) having one end connected to the pivot shaft (24), and an operating portion (42) projecting from the other end of the grip portion (41) toward the interlock (27). With
By rotating the handle (25) about the pivot (24) between the operating portion (42) and the interlocking tool (27), the interlocking tool (27) is attached to the urging member (91). Shin contraction device you characterized in that interlocking member pressing means for pressing the lock release position against the energizing (Y) (67) is provided.

A pair of telescoping bodies (5) having a pair of mantle bodies (8) arranged opposite to each other and an insert body (9) which is telescopically inserted into each mantle body (8) and whose lower end can be grounded;
A plurality of upper and lower steps (6) having longitudinal ends oppositely connected to opposing surfaces of a mantle (8) of a pair of elastic bodies (5);
It is arranged on the opposing surface of each mantle (8) and near the connecting position with the lower step member (6), and at the position where the insert (9) inserted into the mantle (8) is expanded and contracted. A lock mechanism (7) fixed to the mantle (8);
A length extending from the lock mechanism (7) to the vicinity of the upper step member (6) along the opposing surface of each mantle (8), and a lock and unlock operation of each lock mechanism (7). And a scale operating member (69).
Each of the lock mechanisms (7) is supported on a support frame (18) fixed to the mantle (8), and is pivotally supported on the support frame (18) so as to be locked by the insert (9). A locking member (23) that engages with the portion (11);
An interlocking tool (27) connected to the lower end of the long operation member (69) and movably supported at the lock position (X) and the unlock position (Y) on the support frame (18); The lock member (23) is engaged with the insert (9) when the interlock (27) moves to the lock position (X), and locked when the interlock (27) moves to the unlock position (Y). Interlocking means (29) for detaching the member (23) from the insert (9) is provided;
When the interlocking tool (27) moves to the lock position (X), the lock member (23) is prevented from disengaging and swinging, and when the interlocking tool (27) deviates from the lock position (X), the lock member (23). A departure preventing means (30) for allowing the departure swing of the
Each of the mantles (8) holds a long operation member (69) on its opposing surface so as to be vertically movable,
The support frame (18) shall be the feature that it retains its rear wall (33) inner surface in interlocking member (27) and along opposite surfaces of the possible vertical slide overcoat member (8) Shin contraction apparatus.