JP6820023B2

JP6820023B2 - Telescopic device

Info

Publication number: JP6820023B2
Application number: JP2019076071A
Authority: JP
Inventors: 修江良
Original assignee: Pica Corp
Current assignee: Pica Corp
Priority date: 2019-04-12
Filing date: 2019-04-12
Publication date: 2021-01-27
Anticipated expiration: 2035-09-04
Also published as: JP2019132124A

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。 The present invention relates to a telescopic device such as a ladder or a stepladder that can be expanded and contracted.

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, the telescopic device of the strut of the stepladder is provided with a lock mechanism for inserting the insert body into the outer body in a stretchable manner and fixing the insert body in the extended position, and the lock mechanism is a support frame fixed to the outer body. There is a lock member that is swingably pivotally supported with respect to the support frame and engages with the engaged portion of the insert body, and a handle that disengages and swings the lock member from the insert body. ..

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 this type of conventional telescopic device, the handle is formed integrally with a pivot portion that supports the lock member and is movably supported in the axial direction through a pair of side wall portions of the support frame. It is provided with a hooking portion that swings the lock member, supports the handle movably in a direction orthogonal to the swinging direction with respect to the support frame, and hooks the handle with the hooking portion on the side wall portion of the support frame. A hook hole is provided, and when the lock member locks the insert, the hook portion is hooked on the hook hole by moving the handle, so that the handle or the lock member cannot swing and the lock member Some are designed to prevent detachment swing (for example, Patent Document 1).

特開２００６−５２５８１号公報Japanese Unexamined Patent Publication No. 2006-52581

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 conventional case, after the lock member is engaged with the insert by swinging the handle, it is necessary to move the handle in the direction orthogonal to the swing direction to hook the hooking portion in the hooking hole. Further, when the lock member is released from the insert body, the handle is first moved in the direction orthogonal to the swing direction to release the hook from the hook hole of the hook portion, and then the handle swings. There is a problem that the lock member must be separated from the insert by the operation, and the operation of the expansion / contraction adjustment is very troublesome.

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, it is an object of the present invention to provide an expansion / contraction device capable of preventing the lock member from swinging apart and easily performing expansion / contraction adjustment operations.

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、外套体８とこの外套体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とを有する左右一対の伸縮体５と、この左右伸縮体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・中・下３段の踏桟部材６と、各外套体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、各ロック機構７をロック動作及びロック解除動作させる操作部材６９とを備えた伸縮装置であって、
前記各ロック機構７は、挿入体９に長手方向に沿って設けられた被係止部１１と、外套体８と下段踏桟部材６との連結位置近傍に配置されていて挿入体９の被係止部１１と係脱自在に係合するロック部材２３とを有しており、
前記操作部材６９は外套体８の対向面に近接しかつ長手方向に沿って上下移動自在に配置されており、
前記中段の踏桟部材６の長手方向端部と外套体８の対向面との間に操作部材６９が挿通する挿通空間２１が形成されており、
前記操作部材６９は外套体８と上段踏桟部材６との連結位置近傍まで延設されており、操作部材６９の上部に操作部材６９を上下動させるための力が加えられる操作部７０が設けられており、
前記各ロック機構７は、ロック部材２３を揺動自在に支持する枢支軸２４と、外套体８の対向面に固定されていて前記枢支軸２４を支持する支持フレーム１８とを有しており、
前記挿入体９の上端に支持フレーム１８と当接して外套体８からの抜けを規制する抜け止め部材１５が設けられている点にある。
また、本発明の他の技術的手段は、前記左右外套体８は対向部側でかつ挿入体９の被係止部１１に対応する位置に開口溝１０が形成されており、
前記操作部材６９の下部とロック部材２３との間に、操作部材６９の上下移動でロック部材２３を係脱動作させる連結体８２が設けられており、
前記操作部材６９及び連結体８２は開口溝１０を塞ぐように配置されている点にある。 Specific means for solving the problem in the present invention are as follows.
The technical means of the present invention for solving this technical problem is a pair of left and right telescopic bodies 5 having a mantle 8 and an inserter 9 which is stretchably inserted into the mantle 8 and whose lower end can be grounded. , The upper, middle, and lower three-stage tread members 6 in which both ends in the longitudinal direction are connected to the facing surfaces of the outer body 8 of the left and right telescopic body 5 so as to face each other, and the insert body inserted into each outer body 8. A telescopic device including a lock mechanism 7 for fixing the 9 to the mantle 8 at a telescopic position, and an operating member 69 for locking and unlocking each lock mechanism 7.
Each of the lock mechanisms 7 is arranged in the vicinity of the connection position between the locked portion 11 provided on the insertion body 9 along the longitudinal direction, the mantle body 8 and the lower tread member 6, and is covered with the insertion body 9. It has a locking member 23 that engages with the locking portion 11 in a detachable manner.
The operating member 69 is arranged close to the facing surface of the mantle 8 and vertically movable along the longitudinal direction.
An insertion space 21 through which the operation member 69 is inserted is formed between the longitudinal end portion of the tread member 6 in the middle stage and the facing surface of the mantle body 8.
The operation member 69 extends to the vicinity of the connection position between the mantle body 8 and the upper tread member 6, and an operation unit 70 to which a force for moving the operation member 69 up and down is applied is provided above the operation member 69. Has been
Each of the lock mechanisms 7 has a pivot shaft 24 that swingably supports the lock member 23, and a support frame 18 that is fixed to the facing surface of the mantle 8 and supports the pivot shaft 24. Ori
A point is that a retaining member 15 is provided at the upper end of the insertion body 9 so as to come into contact with the support frame 18 and prevent the insertion body 8 from coming off .
Further, in another technical means of the present invention, the left and right mantles 8 have an opening groove 10 formed on the opposite side and at a position corresponding to the locked portion 11 of the insertion body 9.
A connecting body 82 that engages and disengages the lock member 23 by moving the operating member 69 up and down is provided between the lower portion of the operating member 69 and the lock member 23.
The operating member 69 and the connecting body 82 are arranged so as to close the opening groove 10 .

また、本発明の他の技術的手段は、操作部７０は、上段踏桟部材６の上面より下方であって指力が加えられる位置に配置されている点にある。
また、本発明の他の技術的手段は、外套体８と上段踏桟部材６との連結位置近傍に、操作部材６９の上部が外套体８の対向面から離反するのを規制する上ガイド部材７６が設けられている点にある。 Further, another technical means of the present invention is that the operation unit 70 is arranged below the upper surface of the upper tread member 6 at a position where finger force is applied.
Further, another technical means of the present invention is an upper guide member that regulates the upper part of the operating member 69 from separating from the facing surface of the outer body 8 in the vicinity of the connecting position between the outer body 8 and the upper tread member 6. The point is that 76 is provided.

また、本発明の他の技術的手段は、前記外套体８の下部に、操作部材６９の下部が外套体８の対向面から離反するのを規制する下ガイド部材７７が設けられている点にある。 Further, another technical means of the present invention is that a lower guide member 77 that regulates the lower part of the operating member 69 from separating from the facing surface of the mantle body 8 is provided in the lower part of the mantle body 8. Oh Ru.

また、本発明の他の技術的手段は、各ロック機構７は、ロック部材２３を揺動自在に支持する枢支軸２４と、ロック部材２３をロック動作させる方向に付勢する付勢部材９１と、この付勢部材９１に抗してロック部材２３を枢支軸２４廻りに揺動させるハンドル２５とを有している点にある。 Further, in another technical means of the present invention, each lock mechanism 7 has a pivot shaft 24 that swingably supports the lock member 23 and an urging member 91 that urges the lock member 23 in a locking operation direction. If, Ru near point and a handle 25 for swinging the lock member 23 to the pivot shaft 24 around against the urging member 91.

本発明によれば、ロック機構のロック動作及びロック解除動作を、長尺の踏桟部材を使って上段踏桟部材の近傍で行うことができる。
また、本発明によれば、ロック機構７をロック動作及びロック解除動作させる操作部材６９は、外套体８の対向面に近接しかつ長手方向に沿って上下移動自在に配置され、中段の踏桟部材６の長手方向端部と外套体８の対向面との間の挿通空間２１に挿通され、操作部材６９は外套体８と上段踏桟部材６との連結位置近傍まで延設されかつ操作部材６９の上部に操作部材６９を上下動させるための力が加えられる操作部７０が設けられているので、上段踏桟部材６の近傍で操作部材６９を操作してロック機構７のロック動作及びロック解除動作を行うことができ、操作部材６９の保護と円滑な移動ができる。しかも各ロック機構７は、枢支軸２４と、枢支軸２４を支持する支持フレーム１８とを有し、挿入体９の上端に抜け止め部材１５が設けられているので、抜け止め部材１５が支持フレーム１８と当接することにより、挿入体９が外套体８から抜けるのを規制することができる。
また、本発明によれば、操作部材６９の下部とロック部材２３との間に、操作部材６９の上下移動でロック部材２３を係脱動作させる連結体８２が設けられているので、操作部材６９が外套体８に沿い、ロック部材２３が外套体８から離れた位置にあっても、操作部材６９の上下移動をロック部材２３に確実に伝達することができる。しかも操作部材６９及び連結体８２は開口溝１０を塞ぐように配置されているので、挿入体９の被係止部１１を覆い隠すことができる。 According to the present invention, the locking operation and the unlocking operation of the lock mechanism can be performed in the vicinity of the upper tread member by using a long tread member.
Further, according to the present invention, the operating member 69 that locks and unlocks the lock mechanism 7 is arranged close to the facing surface of the mantle 8 and vertically movable along the longitudinal direction, and is arranged so as to be vertically movable along the longitudinal direction. It is inserted into the insertion space 21 between the longitudinal end of the member 6 and the facing surface of the mantle 8, and the operation member 69 extends to the vicinity of the connecting position between the mantle 8 and the upper tread member 6 and is an operation member. Since an operation unit 70 for applying a force for moving the operation member 69 up and down is provided on the upper part of the 69, the operation member 69 is operated in the vicinity of the upper tread member 6 to lock and lock the lock mechanism 7. The release operation can be performed, and the operation member 69 can be protected and smoothly moved. Moreover, each lock mechanism 7 has a pivot shaft 24 and a support frame 18 that supports the pivot shaft 24, and the retaining member 15 is provided at the upper end of the insertion body 9, so that the retaining member 15 can be removed. By contacting with the support frame 18, it is possible to prevent the inserter 9 from coming out of the mantle 8.
Further, according to the present invention, since the connecting body 82 that engages and disengages the lock member 23 by moving the operating member 69 up and down is provided between the lower portion of the operating member 69 and the lock member 23, the operating member 69 Can reliably transmit the vertical movement of the operating member 69 to the lock member 23 even when the lock member 23 is located along the mantle body 8 and away from the mantle body 8. Moreover, since the operating member 69 and the connecting body 82 are arranged so as to close the opening groove 10, the locked portion 11 of the inserting body 9 can be covered.

また、本発明によれば、操作部７０が上段踏桟部材６の上面より下方であって指力が加えられる位置に配置されているので、上段踏桟部材６に手を掛けながら操作部材６９の上下移動操作をすることができる。
また、本発明によれば、中段の踏桟部材６の挿通空間２１だけでなく、上ガイド部材７６を設けているので、操作部材６９の上部が外套体８の対向面から離反するのを規制することができ、操作部材６９の保護と円滑な移動ができる。 Further, according to the present invention, since the operation unit 70 is arranged below the upper surface of the upper tread member 6 at a position where finger force is applied, the operation member 69 is placed while putting a hand on the upper tread member 6. Can be moved up and down.
Further, according to the present invention, not only the insertion space 21 of the tread member 6 in the middle stage but also the upper guide member 76 is provided, so that the upper part of the operating member 69 is restricted from separating from the facing surface of the mantle body 8. The operation member 69 can be protected and smoothly moved.

また、本発明によれば、中段の踏桟部材６の挿通空間２１だけでなく、下ガイド部材７７を設けているので、操作部材６９の下部が外套体８の対向面から離反するのを規制することができ、操作部材６９の保護と円滑な移動ができる。 Further, according to the present invention, not only the insertion space 21 of the tread member 6 in the middle stage but also the lower guide member 77 is provided, so that the lower portion of the operating member 69 is restricted from separating from the facing surface of the mantle body 8. it can be, Ru can protect and smooth movement of the operating member 69.

また、本発明によれば、各ロック機構７は、枢支軸２４と、付勢部材９１と、ロック部材２３を枢支軸２４廻りに揺動させるハンドル２５とを有しているので、ロック部材２３を下段踏桟部材６の近傍でロック動作及びロック解除動作を行うことができる。 Further, according to the present invention, each lock mechanism 7 has a pivot shaft 24, an urging member 91, and a handle 25 that swings the lock member 23 around the pivot shaft 24, so that the lock mechanism 7 is locked. Ru can lock operation and the lock release operation member 23 in the vicinity of the lower踏桟member 6.

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 cross-sectional front view of the stepladder which shows one Embodiment of this invention. 同支柱の斜視図である。It is a perspective view of the support. 同支柱の内側から見た側面図である。It is a side view seen from the inside of the support. 同支柱下部の正面断面図である。It is a front sectional view of the lower part of the support. 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 a front sectional view of the lower part of a column in a state where the lock is released. 同支柱上部の正面断面図である。It is a front sectional view of the upper part of the support. 図４のＡ−Ａ線断面図である。FIG. 4 is a cross-sectional view taken along the line AA of FIG. 図６のＢ−Ｂ線断面図である。FIG. 6 is a cross-sectional view taken along the line BB of FIG. 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 connecting body, an interlocking tool and the like. 脚立の全体側面図である。It is an overall 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 mounted on a stepladder. In FIGS. 1 and 11, the stepladder 1 is mainly configured by pivotally supporting the upper portions of a pair of ladders 2 arranged so as to face each other with a pin 4 via a bracket 3. This stepladder 1 can be used by leaning a pair of ladders 2 against a ground plane, and unlocks the opening stoppers that lock both ladders 2 so as not to open the pair of ladders 2. 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 (expandable bodies) that are arranged at intervals on the left and right and can be expanded and contracted, a plurality of tread members 6 that connect the left and right stanchions 5, and a stanchion 5 and a tread member 6. It has a lock mechanism 7 provided between the two.
In the following description, for convenience of explanation, as shown in FIG. 1, the step ladder member 6 can be viewed from the front, and the direction in which the columns 5 are arranged in parallel (the left-right direction on the paper surface in FIG. 1) is defined as the left-right direction. As shown in 11, the parallel direction of the ladder 2 (the left-right direction on the paper surface of 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 column 5 has a column body 8 (mantle body) formed of a channel material and a square tubular pedestal 9 (insertion body) inserted into the column body 8. The column 5 is expandable and contractible by sliding in the axial direction (vertical direction), and the pedestal 9 is fixed by the lock mechanism 7 so as not to be movable in the axial direction at a predetermined position expanded and contracted. There is.
In FIGS. 1 to 10, the support column body 8 is formed of a metal system such as aluminum in a substantially U-shape in cross section, and an opening groove 10 is formed in the longitudinal direction on the facing portion side of the support column body 8 facing the support column body 8. Is 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 pedestal 9 is formed of a metal material such as aluminum like the column main body 8, and a plurality of locked portions 11 (rack portions) are mounted on the side wall at a position corresponding to the opening groove 10 on the opposite side of the column main body 8. Is formed. A grounding member 12 is attached to the lower end of the pedestal 9, and the grounding member 12 allows the ladder 2 to ground to the grounding surface in a stable state. A retaining member 15 is provided on the upper portion of the insertion base of the pedestal 9 so as to protrude outward from the opening groove 10 so as to contact the support frame 18 of the lock mechanism 7 described later and prevent the pedestal 9 from coming off from the main body 8. Has been done.

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で脚柱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。 As shown in FIG. 6, the retaining member 15 is detachably fixed to the pedestal 9 with a fixing tool 17 such as a bolt.
The tread member 6 is formed in a square cylinder shape, and the upper and lower surfaces of the tread member 6 are inclined so as to move upward or downward from the front side to the rear side, and the inclined portion 16 on the upper surface side. Non-slip irregularities are formed along the longitudinal direction thereof.

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 tread member 6 (6b) at the intermediate portion of the ladder 2 is fixed between the left and right support main bodies 8 via plate-shaped brackets 14 mounted on the front and rear walls 13F and 13R of the support main body 8.
A pair of front and rear brackets 14 are arranged so as to correspond to the outer end portion of the tread member 6, and each bracket 14 has a support column fixing portion 14a and a tread fixing portion 14b via a step portion 14c. The strut fixing portion 14a is fixed to the strut body 8 with a fixing tool 22 such as a rivet, and the tread fixing portion 14b is fixed to the outer end portion of the tread member 6 with a fixing tool 22 such as a rivet, and is shown in FIG. As described above, an insertion space 21 for the long operating member 69, which will be described later, is formed between the outer surface of the support column main body 8 and the end portion of the tread 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 tread member 6a at the lowermost stage of the ladder 2 and the support column 5, and one lock mechanism 7 is provided for each support column 5, and the opposite surfaces of the left and right support column main bodies 8 are provided. The lock mechanism 7 is attached to the ladder.
The lock mechanism 7 is pivotally supported by a support frame 18 fixed to the column main body 8 and swingably in the left-right direction (direction a in FIGS. 4 and 5) with respect to the support frame 18, and is covered by the pedestal 9. A lock member 23 that engages with the locking portion 11, a pivot shaft 24 that swingably supports the lock member 23, and a handle that is supported by the pivot shaft 24 to disengage and swing the lock member 23 from the pedestal 9. It has 25 and.

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。 As will be described later, the lock member 23 is swingable in the left-right direction about the pivot shaft 24 supported by the support frame 18, and can be freely engaged with and disengaged from the pedestal 9 by swinging the lock member 23. You can do it.
Further, the lock mechanism 7 has an interlocking tool 27 movably supported on the support frame 18 at the lock position X and the unlock position Y shown in FIGS. 2, 4 and 5, and the lock member 23 and the interlocking tool. When the interlocking tool 27 moves to the lock position X, the lock member 23 is engaged with the pedestal 9, and when the interlocking tool 27 moves to the unlocking position Y, the lock member 23 is moved to the pedestal 9 When the interlocking means 29 and the interlocking tool 27 move to the lock position X, the locking member 23 is prevented from swinging apart, and when the interlocking tool 27 is disengaged from the lock position X, the locking member 23 is disengaged and swung. Withdrawal preventing means 30 is provided.

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 in a box shape by bending a single metal-based plate material such as aluminum, and can be attached to the column main body 8 and the tread member 6, and is mounted on the pedestal 9 side (column 5). The side) has an opening shape, and is attached to the front and rear walls 13F and 13R of the column main body 8 and extends to the opposite side, and a pair of front and rear side wall portions 32F and 32R and a locked portion of the pedestal 9. A pair of treads that face the 11 and are arranged between the front and rear side wall portions 32F and 32R, and a pair of treads that protrude downward from the lower part of the front and rear side wall portions 32F and 32R and are attached to the tread 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 portions of the front and rear side wall portions 32F and 32R of the support frame 18 are formed so that the front and rear walls 13F and 13R of the support column main body 8 can be sandwiched, and the front and rear wall 13F of the support column main body 8 is formed by the outer portions of the front and rear side wall portions 32F and 32R. , 13R is sandwiched and fixtures 22 such as rivets are struck against them, so that the support frame 18 is attached to the support column main body 8.
The rivet mounting portions 34F and 34R of the support frame 18 are formed so as to be able to sandwich the end sides of the front and rear walls 26F and 26R of the rivet member 6, and the rivet mounting portions 34F and 34R are formed in front of and behind the rivet member 6. The support frame 18 is attached to the tread member 6 by sandwiching the end sides of the walls 26F and 26R and striking fixtures 22 such as rivets against them.

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 tread member 6 to the support column 5, thereby reducing the number of brackets for attaching the treadle member 6 to the support column 5. it can.
When the support frame 18 is attached to the tread member 6, the inclined portion 16 on the upper surface side of the tread member 6 plunges into the support frame 18. The back wall portion 33 of the support frame 18 is formed in the shape of a vertical plate 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は枢支軸用貫通孔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 through the front and rear side wall portions 32F and 32R of the support frame 18, and is rotatably supported in the same direction as the swing direction of the lock member 23.
A retaining ring 37 having a diameter larger than that of the pivot shaft through hole 36R (one of the pivot shaft through holes 36F and 36R) of the rear side wall portion 32R is attached to the tip 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 to serve as a stopper, and the pivot shaft 24 is prevented from falling out of the through hole 36R for the pivot shaft.

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 actuating portion 42 protruding from the grip portion 41 toward the interlocking tool 27, and the grip portion 41 is a pivot shaft. It is fixed to one end (front end) of 24 by welding or the like, is arranged along the outer surface of the front side wall 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 in the rear direction at a position radially separated from the pivot shaft 24. The pivot shaft 24, the grip portion 41, and the actuating portion 42 are formed in a substantially U-shape in 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 actuating portion 42 of the handle 25 is inserted through the actuating portion through hole 44 provided in the lower part of the front wall portion 32F of the support frame 18. The through hole 44 for the operating portion is formed in an arc shape centered on the axis of the pivot shaft 24 (the center of the through holes 36F and 36R for the pivot shaft).
The grip portion 41 of the handle 25 integrally connects the pivot shaft 24 and the actuating portion 42. A synthetic resin handle cover 47 is externally fitted to the front portion of the grip portion 41 and the pivot shaft 24 and the front portion of the actuating portion 42, and the handle cover 47 is mounted on the front portion of the grip portion 41 and the pivot shaft 24 and the actuating portion. It covers the outer circumference of 42 with the front part. Left and right narrow knobs 48 are projected downward from the lower part 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 arranged between the front and rear wall portions 32F and 32R of the support frame 18, and is arranged outside the pivot shaft mounting portion 49 mounted on the front and rear substantially central portion of the pivot shaft 24 and the operating portion 42. It has a swinging protrusion 51 and a locking portion 52 that engages with the locked portion 11 of the pedestal 9.
The pivot shaft mounting portion 49 of the lock member 23 is rotatably fitted to the pivot shaft 24, and the lock member 23 is swingably supported around the pivot shaft 24 in the left-right direction (a direction). ing. A pressing portion 54 is projected toward the interlocking tool 27 at the lower portion (free end side) of the lock member 23, and an operating piece 55 is projected inward at the pivot shaft mounting portion 49.

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 has a back that connects an upper wall 27b that connects a pair of front and rear side walls 27a and an upper portion of the front and rear side walls 27a and an inner end portion of the front and rear side walls 27a in the left-right direction. It is formed in a box shape having an opening on the outside side having a wall 27c, and is arranged so as to project upward in the lateral direction of the lock member 23 in the support frame 18, and is formed on the inner surface of the back wall portion 33 of the support frame 18. It is held so that it can slide (move) up and down along it. Therefore, the interlocking tool 27 of the left and right support frames 18 is movably held along the facing surfaces of the left and right support columns 8 in the longitudinal direction thereof.

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。 The square cylinder 57 is projected outward from the upper part of the back wall 27c of the interlocking tool 27, the upper part of the square cylinder 57 is the first push piece 58, and the lower part is the second push piece 59. The first pushing piece 58 and the second pushing piece 59 are vertically separated from each other with the tip of the operating piece 55 sandwiched vertically. A regulating portion 60 is projected outward from the lower side of the square cylinder 57 of the back wall 27c, and a pair of front and rear cam walls 61 having arc-shaped 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 are projected 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 projecting from the lock member 23, and a first pushing piece 58 and a second pushing piece 59 projecting from the interlocking tool 27, and the first pushing force 29. The piece 58 and the second pushing 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 push piece 58 pushes the operation piece 55, and when the interlocking tool 27 moves to the unlock position Y, the second push piece 59 swings the lock member 23 in the release direction. Is configured to push.

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 unlocking position Y to the locking position X, the regulating portion 60 first pushes the pressing portion 54 downward to move the locking member 23 in the engaging direction. After swinging, the first pushing piece 58 pushes the operating piece 55 downward, and when the interlocking tool 27 moves to the lock position X, the locking member 23 swings in the engaging direction. The movement is to be 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。 Further, the detachment preventing means 30 includes a pressing portion 54 projecting toward the interlocking tool 27 on the swinging end side of the lock member 23, and a regulating portion 60 projecting toward the pressing portion 54 on the interlocking tool 27. 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 lock member 23 from swinging apart, and the interlocking tool 27 is released from the lock position X. Occasionally, the restricting portion 60 is configured to deviate from the position facing the pressing portion 54 to allow the lock member 23 to swing apart.

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。 Further, in FIG. 4, when the interlocking tool 27 moves from the lock position X to the lock release position Y, the locking member 23 starts to swing apart after the restricting portion 60 is released from the pressing portion 54. As shown, an idle gap 65 is formed between the second pushing piece 59 and the operating piece 55.
By rotating the handle 25 around the pivot shaft 24 inward to the left and right in the direction of the arrow a, the interlocking tool 27 is pushed to the unlocked position Y against the urging of the urging member 91 described later. The tool pushing means 67 is provided between the grip portion 41 and the interlocking tool 27. The interlocking tool pushing means 67 is composed of an outer peripheral surface of the operating portion 42 and a cam surface 61a of the front and rear cam walls 61 of the interlocking tool 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 operating member 69 for operating the lock member 23 is arranged on the outer surface of the support column main body 8 so as to close the opening groove 10. .. The long operating member 69 is movably held in the longitudinal direction along the outer surface of the support column main body 8, and is vertically movably held in the insertion space 21. The interlocking tool 27 is connected to the lower end (one end) of the long operating member 69 via a connecting body 82 described later, and the operating portion 70 is provided at the upper end (the other end) of the long operating 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 plate-shaped operation wall portion 69a that is long in the vertical direction and a pair of front and rear side wall portions 69b that project outward from both front and rear ends of the operation wall portion 69a. An upper locking hole 71 and a lower locking hole 72 are provided at a lower portion with a vertical interval, and these locking holes 71 and 72 are formed in a long rectangular shape in the front-rear direction.
The operation unit 70 is formed separately from the long operation member 69, and is bent outward from the upper portion of the mounting wall 70a arranged along the outer surface of the long operation member 69 and the mounting wall 70a. The top wall 70b is provided on the upper end surface of the long operation member 69, and the mounting wall 70a is fixed to the long operation member 69 by a fixture 22 such as a rivet, and is above the outer end of the top wall 70b. A finger hook piece 74 is projected in a hook shape toward the surface.

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。 The support column main body 8 is provided with an upper guide member 76 and a lower guide member 77 that movably guide the long operating member 69.
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 the upper left and right inner ends of the front and rear side walls 76a, and a back wall 76b. An inclined wall 76c that slopes outward from the lower part of the wall 76b and is connected to the front and rear side walls 76a, and a vertical plate-shaped support wall 76d that stands upward from the lower part of the inclined wall 76c and is 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 striking a fixture 22 such as a rivet, and the long operating member 69 is formed between the support wall 76d and the outer surface of the support body 8. The upper part is held so that it can be moved up and down. A discharge hole for discharging rainwater is provided in the lower part of 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 protrudes inward from the pair of front and rear side walls 77a, the 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 between the upper parts of the storage side wall 77c.
A step portion 80 is provided in the middle of the front-rear side wall 77a in the left-right direction, an engaging piece 81 is projected inward in the front-rear direction inward of the step portion 80, and the outer portion of the front-rear side wall 77a is a rivet. By striking a fixture 22 such as, etc., it is fixed to the front and rear side walls 13F and 13R of the support column main body 8, and the front and rear ends of the long operating member 69 can be moved up and down between the step portion 80 and the engaging piece 81. I'm holding it.

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 operating member 69. The connecting body 82 has a front wall 82a and a back wall 82b on the left and right sides, the back wall 82b projects upward from the front wall 82a, and the upper wall 82c projects inward from the upper part of the back wall 82b. On the outer side of the upper wall 82c, an upper engaging piece 83 bent in a stepwise manner upward and outward is provided. A bottom wall 82d that connects the lower part of the back wall 82b and the lower part of the front wall 82a is provided, a cylindrical connecting cylinder 85 is provided between the back wall 82b and the bottom wall 82d, and the upper part and the back of the front wall 82a are provided. A lower spring receiving wall 86 for connecting the intermediate portion of the wall 82b is provided, and a connecting wall 82e for connecting the front wall 82a, the back wall 82b, the bottom wall 82d, and the lower spring receiving wall 86 is provided. A lower engaging piece 84 is projected outward from the upper part of the front wall 82a in a hook shape.

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 engaging piece 83 is detachably engaged with the upper locking hole 71 of the long operating member 69, and the lower engaging piece 84 is engaged with the lower locking hole 72 so as to be engaged and disengaged. The body 82 is detachably connected and fixed to the lower part of the long operating member 69 in a downward protruding shape.
The connecting body 82 is placed on the upper wall 27b of the interlocking tool 27 via the bottom wall 82d, and is connected by inserting and tightening a tightening tool 88 such as a bolt nut through the front and rear connecting pieces 62 and the connecting cylinder 85. The body 82 is detachably connected to the interlocking tool 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, the spring storage case 89 is formed by the upper half of the back wall 82b of the connecting body 82, the lower spring receiving wall 86, the front and rear storage side walls 77c of the lower guide member 77, and the upper spring receiving wall 79.
The coil spring 90 is housed in the spring storage case 89 in the vertical direction, 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 connecting body 82 to the interlocking tool 27 are urged downward. Therefore, the interlocking tool 27 is urged to the lock position X by the urging member 91 formed 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。 Further, 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 to remove the connecting body 82 from the long operating member 69, and the fastener 88 is removed to remove the connecting body 82. By removing the link 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.
Further, by removing the connecting body 82 from the long operating member 69, loosening the fastener 88, and rotating the connecting body 82 inward around the tightening tool 88, the connecting body 82 can also be rotated inward. The opening groove 10 can be opened by retracting from between the 69 and the interlocking tool 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, a tool can be inserted through the opening groove 10 to remove the retaining member 15 attached to the upper part of the pedestal 9, whereby the damaged pedestal 9 can be taken out from the column body 8 and replaced or repaired. Can be done.
According to the above embodiment, as shown in FIG. 4, the lock member 23 is engaged with the locked portion 11 of the pedestal 9, and the pedestal 9 is immovably locked with respect to the column main body 8. When adjusting the expansion and contraction of the support column 5, when a finger is hooked on the finger hook piece 74 of the operation unit 70 and the long operation member 69 is pulled upward, the interlocking tool 27 resists the urging of the urging member 91 and the lock position X. Moves to the unlock position Y from. Alternatively, when the knob 48 of the handle cover 47 is picked up and the handle 25 is swung around the pivot shaft 24 in the left-right inward direction in the direction of arrow a, the operating portion 42 pushes the cam surface 61a upward to attach the interlocking tool 27. It moves from the lock position X to the unlock position Y against the urging of the force 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。 Then, when the interlocking tool 27 moves from the lock position X to the unlocking position Y, since there is an idle gap 65 between the second pushing piece 59 and the operating piece 55, first, the interlocking tool 27 is moved upward. The restricting portion 60 is disengaged from the position facing the pressing portion 54, the disengagement prevention of the lock member 23 by the disengagement preventing means 30 is released, and the disengagement swing of the lock member 23 becomes possible. After that, the second pushing piece 59 pushes the operation piece 55 upward, the release swing of the lock member 23 is started, and the lock member 23 swings in the release direction. When the interlocking tool 27 moves to the unlocked position Y, the release of the pedestal 9 of the lock member 23 from the locked portion 11 is completed. As a result, the pedestal 9 becomes movable with respect to the column main body 8, and the column 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。 To lock the pedestal 9 immovably with respect to the support body 8 after expanding and contracting the support column 5, release the upward pull of the long operating member 69 or release the swing operation of the handle 25. Then, due to the urging of the urging member 91, the long operating member 69 to the interlocking tool 27 moves downward, and the interlocking tool 27 moves from the unlock position Y to the lock position X.
When the interlocking tool 27 moves from the unlocking position Y to the locking position X, the regulating unit 60 first pushes the pressing unit 54 downward to swing the locking 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 swing of the lock member 23 in the engaging 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
。 Further, when the interlocking tool 27 moves to the lock position X, the pressing portion 54 and the regulating portion 60 face each other, and the release preventing means 30 prevents the lock member 23 from swinging in the release direction. As a result, the lock member 23 engages with the locked portion 11 of the pedestal 9, whereby the pedestal 9 is immovably locked with respect to the column body 8. Moreover, the detachment preventing means 30 can prevent the lock member 23 from swinging in the detaching direction, and can surely prevent the pedestal 9 from unexpectedly expanding and contracting with respect to the support column main 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。 Therefore, when the interlocking tool 27 moves to the lock position X, the interlocking means 29 engages the lock member 23 with the pedestal 9, and at the same time, the disengagement preventing means 30 engages the lock member 23 with the pedestal 9. It is possible to prevent it from coming off unexpectedly. Moreover, when the interlocking tool 27 is released from the lock position X, the release preventing means 30 allows the lock member 23 to swing apart, and the interlocking tool 27 moves from the lock position X to the lock release position Y, so that the lock member 23 is moved. The engagement with the pedestal 9 and the disengagement from the pedestal 9 can be easily changed, and the expansion / contraction adjustment operation 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。 Further, since the long operation member 69 is arranged along the outer surface of the support column main body 8, the lock mechanism 7 and the long operation member 69 do not interfere with the use of the stepladder 1. Moreover, since the lock mechanism 7 and the long operating member 69 are arranged outside the pedestal 9, the pedestal 9 can be formed of a tubular body, which is advantageous in terms of strength. Further, by using the long operation member 69, it is possible to easily operate the engagement of the lock member 23 with the pedestal 9 and the disengagement from the pedestal 9 from a position 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 embodiment, the telescopic device is applied to the stepladder 1 having the telescopic support 5, but instead, the telescopic device may be applied to the ladder 2, the scaffolding platform, or the like.
Further, the telescopic body is not limited to the strut 5 composed of the strut body 8 and the pedestal 9, and the telescopic body may be a member that expands and contracts as a whole by inserting the pedestal 9 into the tubular 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 above embodiment, when the interlocking tool 27 moves from the unlocking position Y to the locking position X, the regulating portion 60 first pushes the pressing portion 54 downward and swings the lock member 23 in the engaging direction. After that, the first pushing piece 58 pushes the operating piece 55 downward. Instead, when the interlocking tool 27 moves from the unlocking position Y to the locking position X, the first pushing piece 58 is moved downward. 1 The lock member 23 may swing in the engaging direction only when the pushing piece 58 pushes the operating 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
１３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 (expansion and contraction device)
2 Ladder 5 Support (expandable body)
6 Tread member 7 Lock mechanism 8 Support body (mantle body)
9 pedestal (insertion body)
10 Opening groove 11 Locked part 13 Locking part 13 Support frame 21 Insertion space 23 Locking member 24 Pivot shaft 25 Handle 27 Interlocking tool 29 Interlocking means 30 Detachment preventing means 41 Gripping part 42 Acting part 54 Pressing part 55 Operation piece 58 1st push piece 59 2nd push piece 60 Control part 65 Idle gap 67 Interlocking tool Pushing means 69 Long operating member 70 Operating part 77 Lower guide member 82 Connecting body 90 Coil spring 91 Biasing member

Claims

A pair of left and right telescopic bodies (5) having an outer body (8) and an insert body (9) that is elastically inserted into the outer body (8) and whose lower end can be grounded, and the left and right elastic bodies (5). ), The upper, middle, and lower three-stage tread members (6), which are connected to the facing surfaces of the outer body (8) in the longitudinal direction so as to face each other, and the insertion inserted into each outer body (8). Expansion and contraction including a lock mechanism (7) for fixing the body (9) to the mantle body (8) at an expanded and contracted position, and an operating member (69) for locking and unlocking each lock mechanism (7). It ’s a device,
Each of the lock mechanisms (7) is near the connection position between the locked portion (11) provided on the insert body (9) along the longitudinal direction, the mantle body (8), and the lower tread member (6). It has a lock member (23) that is arranged in the insert body (9) and engages with the locked portion (11) of the insert body (9) in a detachable manner.
The operating member (69) is arranged close to the facing surface of the mantle body (8) and can be moved up and down along the longitudinal direction.
An insertion space (21) through which the operation member (69) is inserted is formed between the longitudinal end of the tread member (6) in the middle stage and the facing surface of the mantle (8).
The operating member (69) extends to the vicinity of the connecting position between the mantle body (8) and the upper tread member (6), and the operating member (69) is moved up and down above the operating member (69). There is an operation unit (70) to which the force of
Each of the lock mechanisms (7) has a pivot shaft (24) that swingably supports the lock member (23) and the pivot shaft (24) that is fixed to the facing surface of the mantle body (8). It has a support frame (18) to support and
A telescopic device characterized in that a retaining member (15) is provided at the upper end of the insertion body (9) so as to come into contact with the support frame (18) and regulate the removal from the mantle body (8) .

The left and right mantles (8) have an opening groove (10) formed on the opposite side and at a position corresponding to the locked portion (11) of the insert body (9).
A connecting body (82) for engaging and disengaging the locking member (23) by moving the operating member (69) up and down is provided between the lower portion of the operating member (69) and the locking member (23).
The telescopic device according to claim 1, wherein the operating member (69) and the connecting body (82) are arranged so as to close the opening groove (10) .

The telescopic device according to claim 1 or 2, wherein the operation unit (70) is arranged below the upper surface of the upper tread member (6) at a position where finger force is applied.

An upper guide member (76) that regulates the upper part of the operating member (69) from separating from the facing surface of the outer body (8) in the vicinity of the connecting position between the outer body (8) and the upper tread member (6). The telescopic device according to any one of claims 1 to 3, wherein the telescopic device is provided.

A claim characterized in that a lower guide member (77) for restricting the lower part of the operating member (69) from separating from the facing surface of the mantle body (8) is provided in the lower part of the mantle body (8). Item 2. The telescopic device according to any one of Items 1 to 4.

Each of the lock mechanisms (7) includes a pivot shaft (24) that swingably supports the lock member (23), and an urging member (91) that urges the lock member (23) in a locking operation direction. The first to fifth aspects of the invention, wherein the lock member (23) has a handle (25) that swings around the pivot shaft (24) against the urging member (91). The telescopic device according to any one item.