JP4140036B2

JP4140036B2 - Trolley-type work scaffolding

Info

Publication number: JP4140036B2
Application number: JP2004370623A
Authority: JP
Inventors: 健次小林; 政司山田
Original assignee: Daifuku Co Ltd
Current assignee: Daifuku Co Ltd
Priority date: 2004-12-22
Filing date: 2004-12-22
Publication date: 2008-08-27
Anticipated expiration: 2024-12-22
Also published as: JP2006177020A

Description

本発明は、台車上に昇降自在に支持された作業足場台と、この作業足場台と台車との間に架設された伸縮自在梯子とを備えた台車式作業足場に関するものである。 The present invention relates to a cart-type work platform including a work platform supported so as to be movable up and down on a cart, and a telescopic ladder constructed between the work platform and the cart.

この種の台車式作業足場は、高所作業用に各方面で活用されているが、従来の一般的な台車式作業足場は、台車の上に立設された垂直伸縮自在な伸縮フレームの昇降上端部で作業足場台が支持されると共に、当該作業足場台と台車との間に垂直に伸縮自在梯子が介装されている。このような従来の構成の台車式作業足場では、梯子が垂直に立っている状態であるから、台車と作業足場台との間での作業者の昇り降りが安全に行い難いという問題点がある。梯子が斜めに架設されたこの種の台車式作業足場は、例えば特許文献１などにより知られているが、当該特許文献１に記載された台車式作業足場は、台車に対して作業足場台を梯子と平行な傾斜方向に伸縮する伸縮フレームで支持させる構成であった。
実公昭６４−３７３４号公報 This type of truck-type work platform is used in various directions for working at heights, but the conventional general truck-type work platform is raised and lowered by a vertically extendable telescopic frame standing on the carriage. A work platform is supported at the upper end, and a telescopic ladder is vertically interposed between the work platform and the carriage. Since the ladder-type work scaffolding having such a conventional configuration is in a state in which the ladder stands vertically, there is a problem that it is difficult for the worker to ascend and descend safely between the carriage and the work platform. . This type of truck-type work scaffolding in which ladders are installed obliquely is known from, for example, Patent Document 1 and the like, but the truck-type work scaffold described in Patent Document 1 has a work scaffold base with respect to the carriage. It was configured to be supported by an extendable frame that expands and contracts in an inclined direction parallel to the ladder.
Japanese Utility Model Publication No. 64-3734

上記のような特許文献１に記載された台車式作業足場の構成では、伸縮フレーム自体を梯子と平行に傾斜させて斜めに伸縮させるものであるから、上昇せしめられた作業足場台の揺れを無くして安全に作業を行えるようにすると共に必要十分な耐久性を持たせるためには、伸縮フレームに相当の曲げ強度が必要となり、台車式作業足場全体の大重量化、延いては取り扱い作業性の低下、大幅なコストアップは免れず、実用性に乏しいものであった。 In the configuration of the carriage type work scaffold described in Patent Document 1 as described above, the telescopic frame itself is tilted in parallel with the ladder to be stretched and contracted diagonally, so that the lift of the raised work scaffold base is eliminated. In order to be able to work safely and have sufficient and sufficient durability, the telescopic frame needs to have a considerable bending strength, which increases the weight of the entire bogie type work platform, and hence the handling workability. The decline and significant cost increase was inevitable, and the practicality was poor.

本発明は上記のような従来の問題点を解消し得る台車式作業足場を提供することを目的とするものであって、請求項１に記載の本発明では、その手段を後述する実施形態の参照符号を付して示すと、台車１上に昇降自在に支持された作業足場台１０と、この作業足場台１０と台車１との間に架設された伸縮自在梯子１２とを備え、前記作業足場台１０は、台車１に対して垂直に立設され且つ伸縮駆動手段９により伸縮駆動される伸縮フレーム６の昇降上端部に支持され、前記伸縮自在梯子１２は、下端側が前記伸縮フレーム６から離れるように梯子全体が斜めに傾斜する姿勢において、上端が作業足場台１０側に下端が前記台車１側に、それぞれ水平支軸３１，３４の周りに揺動自在に軸支されて、作業足場台１０の昇降に伴って傾斜角度を変えながら伸縮するように構成されている台車式作業足場において、前記伸縮フレーム６の台車側固定フレーム部分７と台車１との間に、前記伸縮自在梯子１２を左右両側から挟むように配置された左右一対の台車手押し操作用バー１３が架設する構成となっている。 The object of the present invention is to provide a carriage-type work scaffold capable of solving the conventional problems as described above. In the present invention according to claim 1, the means is described in an embodiment described later. When are denoted with reference numerals, with a work scaffolding platform 10 which is vertically movably supported on the carriage 1, a telescopic ladder 12 which is bridged between the working scaffold platform 10 and the carriage 1, before Symbol The work platform 10 is vertically supported with respect to the carriage 1 and supported by the upper and lower upper ends of the telescopic frame 6 that is telescopically driven by the telescopic driving means 9. The telescopic ladder 12 has a lower end on the telescopic frame 6. In a posture in which the entire ladder is inclined obliquely so as to be separated from the work platform, the upper end is supported on the work platform 10 side and the lower end is supported on the cart 1 side so as to be swingable around the horizontal support shafts 31 and 34, respectively. As the scaffold base 10 moves up and down, the inclination angle In bogie type work scaffold is configured to stretch while example, between the carriage-side fixing frame part 7 and carriage 1 of the telescopic frame 6, which is arranged so as to sandwich the telescopic ladder 12 from left and right sides A pair of left and right cart hand pushing operation bars 13 is constructed .

上記構成の本発明を実施するについて、具体的には請求項２に記載のように、前記伸縮フレーム６の台車側固定フレーム部分７には、その外側を覆うカバー材６０ａ〜６０ｄを張設し、当該カバー材６０ａ〜６０ｄの内、少なくとも前記伸縮自在梯子１２と伸縮フレーム６とを結ぶ台車前後方向に位置するカバー材６０ｂ，６０ｄは、透明材料から構成するのが望ましい。 In carrying out the present invention having the above-described configuration, specifically, as described in claim 2, cover materials 60 a to 60 d covering the outside are stretched on the cart-side fixed frame portion 7 of the telescopic frame 6. Of the cover members 60a to 60d, at least the cover members 60b and 60d positioned in the front-rear direction of the carriage connecting the extendable ladder 12 and the extendable frame 6 are preferably made of a transparent material.

又、請求項３に記載の本発明では、台車１上に昇降自在に支持された作業足場台１０と、この作業足場台１０と台車１との間に架設された伸縮自在梯子１２とを備え、前記作業足場台１０は、台車１に対して垂直に立設され且つ伸縮駆動手段９により伸縮駆動される伸縮フレーム６の昇降上端部に支持され、前記伸縮自在梯子１２は、下端側が前記伸縮フレーム６から離れるように梯子全体が斜めに傾斜する姿勢において、上端が作業足場台１０側に下端が前記台車１側に、それぞれ水平支軸３１，３４の周りに揺動自在に軸支されて、作業足場台１０の昇降に伴って傾斜角度を変えながら伸縮するように構成されている台車式作業足場において、前記台車１は、その長手方向一端部上に前記伸縮フレーム６が立設されると共に他端部上に前記伸縮自在梯子１２の下端が軸支された平面長方形状のもので、少なくとも伸縮フレーム６が立設された一端部側の左右両側には、出退自在なアウトリガー５ａ〜５ｄが設けられ、このアウトリガー５ａ〜５ｄは、台車１の四隅に各々垂直軸心４の周りに回転自在に設けられ、各アウトリガー５ａ〜５ｄを台車１の側辺に沿った退入姿勢において係止する係止具５０ａ〜５０ｄが併設された構成となっている。According to the third aspect of the present invention, the work platform 10 is supported on the carriage 1 so as to be movable up and down, and the telescopic ladder 12 is provided between the work platform 10 and the carriage 1. The working platform 10 is supported vertically on the upper and lower ends of the telescopic frame 6 which is set up vertically with respect to the carriage 1 and is telescopically driven by the telescopic driving means 9, and the telescopic ladder 12 has the lower end on the telescopic side. In a posture in which the entire ladder is inclined obliquely away from the frame 6, the upper end is pivotally supported around the horizontal support shafts 31 and 34, respectively, on the work platform 10 side and the lower end on the cart 1 side. In the cart type work scaffolding configured to expand and contract while changing the inclination angle as the work platform 10 is raised and lowered, the telescopic frame 6 is erected on one end in the longitudinal direction of the cart 1. With the other end on the front The telescopic ladder 12 is a flat rectangular shape that is pivotally supported at its lower end, and at least the left and right sides of one end portion where the telescopic frame 6 is erected are provided with retractable outriggers 5a to 5d. 5a to 5d are provided at the four corners of the carriage 1 so as to be rotatable around the vertical axis 4, respectively, and are used to engage the outriggers 5a to 5d in a retracted posture along the side of the carriage 1. 50d is provided.

更に、請求項４に記載の本発明では、台車１上に昇降自在に支持された作業足場台１０と、この作業足場台１０と台車１との間に架設された伸縮自在梯子１２とを備え、前記作業足場台１０は、台車１に対して垂直に立設され且つ伸縮駆動手段９により伸縮駆動される伸縮フレーム６の昇降上端部に支持され、前記伸縮自在梯子１２は、下端側が前記伸縮フレーム６から離れるように梯子全体が斜めに傾斜する姿勢において、上端が作業足場台１０側に下端が前記台車１側に、それぞれ水平支軸３１，３４の周りに揺動自在に軸支されて、作業足場台１０の昇降に伴って傾斜角度を変えながら伸縮するように構成されている台車式作業足場において、前記台車１は、その長手方向一端部上に前記伸縮フレーム６が立設されると共に他端部上に前記伸縮自在梯子１２の下端が軸支された平面長方形状のもので、その四隅下側と、前記伸縮フレーム６の台車側固定フレーム部分７の上端で伸縮自在梯子１２のある側とは反対側に、移動用車輪６１が配設された構成となっている。Furthermore, in the present invention described in claim 4, a work scaffold 10 supported on the carriage 1 so as to be movable up and down, and a telescopic ladder 12 constructed between the work scaffold 10 and the carriage 1 are provided. The working platform 10 is supported vertically on the upper and lower ends of the telescopic frame 6 which is set up vertically with respect to the carriage 1 and is telescopically driven by the telescopic driving means 9, and the telescopic ladder 12 has the lower end on the telescopic side. In a posture in which the entire ladder is inclined obliquely away from the frame 6, the upper end is pivotally supported around the horizontal support shafts 31 and 34, respectively, on the work platform 10 side and the lower end on the cart 1 side. In the cart type work scaffolding configured to expand and contract while changing the inclination angle as the work platform 10 is raised and lowered, the telescopic frame 6 is erected on one end in the longitudinal direction of the cart 1. And on the other end The lower end of the extendable ladder 12 is a planar rectangular shape that is pivotally supported. The lower side of the four corners and the upper end of the carriage side fixed frame portion 7 of the extendable frame 6 are opposite to the side where the extendable ladder 12 is located. In addition, a moving wheel 61 is provided.

尚、前記作業足場台１０には安全手摺り枠１１を併設することができるが、請求項５に記載のように、この安全手摺り枠１１は、この安全手摺り枠１１を含む全高を低くする倒伏姿勢に切り換え可能に構成するのが望ましい。又この場合、請求項６に記載のように、倒伏姿勢に切り換えられた前記安全手摺り枠１１を前記伸縮フレーム６の台車側固定フレーム部分７に係止するロック手段４４を設けることができる。The work platform 10 can be provided with a safety handrail frame 11. As described in claim 5, the safety handrail frame 11 has a lower overall height including the safety handrail frame 11. It is desirable to be able to switch to the lying posture. Further, in this case, as described in claim 6, there can be provided locking means 44 for locking the safety handrail frame 11 switched to the lying posture to the cart side fixed frame portion 7 of the telescopic frame 6.

又、請求項７に記載のように、前記伸縮フレーム６は、台車側固定フレーム部分７とその内側を昇降し且つ上端で作業足場台１０を支持する昇降フレーム部分８とから構成し、前記伸縮駆動手段９は、前記昇降フレーム部分８の内側に配置され且つ前記台車側固定フレーム部分７の上端側に支持されたチエン巻き上げ繰り出し手段２５から構成し、当該チエン巻き上げ繰り出し手段２５で巻き上げ繰り出し操作されるチエン２７の端部を前記昇降フレーム部分８の下端に係止し、当該チエン巻き上げ繰り出し手段２５を前記台車側固定フレーム部分７の横外側に配置された操作ハンドル２９で駆動操作し得るように構成することができる。According to a seventh aspect of the present invention, the telescopic frame 6 comprises a carriage side fixed frame portion 7 and an elevating frame portion 8 that moves up and down the inside and supports the work platform 10 at the upper end. The driving means 9 is composed of a chain winding and feeding means 25 arranged inside the elevating frame part 8 and supported on the upper end side of the cart side fixed frame part 7, and the chain winding and feeding means 25 performs the winding and feeding operation. The end of the chain 27 is locked to the lower end of the elevating frame portion 8 so that the chain winding and feeding means 25 can be driven and operated by the operation handle 29 disposed on the laterally outer side of the cart side fixed frame portion 7. Can be configured.

前記伸縮フレーム６の台車側固定フレーム部分７と昇降フレーム部分８とは、請求項８に記載のように、それぞれ四隅に配置されたアルミニウム成形材から成る角柱状部材１４ａ〜１５ｄを備えたものとし、各角柱状部材１４ａ〜１５ｄには、当該角柱状部材１４ａ〜１５ｄの長さ方向に連続する横断面奥広がり形の部材取付用溝１８が設けられたものを使用し、台車側固定フレーム部分７と昇降フレーム部分８との間に介在される昇降ガイド用ローラー１９，２０には、当該ローラー１９，２０が対接する側の角柱状部材１４ａ〜１５ｄの前記部材取付用溝１８に嵌合する大径鍔部１９ａ，２０ａを有せしめ、このローラー１９，２０を支持する側の角柱状部材１４ａ〜１５ｄに前記部材取付用溝１８を介して取り付けられた軸受け部材２１，２２に当該ローラー１９，２０を軸支することができる。The carriage side fixed frame portion 7 and the elevating frame portion 8 of the telescopic frame 6 are each provided with prismatic members 14a to 15d made of aluminum molding materials arranged at four corners, respectively, as claimed in claim 8. Each of the prismatic members 14a to 15d is provided with a member mounting groove 18 having a transverse cross section extending in the longitudinal direction of the prismatic members 14a to 15d. 7 and the lifting guide rollers 19 and 20 interposed between the lifting frame portion 8 are fitted in the member mounting grooves 18 of the prismatic members 14a to 15d on the side where the rollers 19 and 20 abut. The bearing member 2 is provided with large-diameter flanges 19a and 20a, and is attached to the prismatic members 14a to 15d on the side supporting the rollers 19 and 20 via the member attaching grooves 18. , It can be pivotally supported the rollers 19 and 20 to 22.

前記伸縮自在梯子１２は、請求項９に記載のように、下端を台車１側に軸支された下側梯子部分３２と、上端を作業足場台１０側に軸支され且つ下端側が前記下側梯子部分３２に重なる上側梯子部分３５と、上下両梯子部分３２，３５の重なり部分を互いに重なり状態で長さ方向に相対移動のみ可能に保持させる保持手段３６とから構成し、この保持手段３６は、上下各梯子部分３２，３５の端部の左右両側に取り付けられて相手側梯子部分３５，３２の左右両側辺を保持する保持部材３７，３８と、各保持部材３７，３８の内側に付設された合成樹脂製滑り材３９とから構成することができる。The telescopic ladder 12 includes a lower ladder portion 32 whose lower end is pivotally supported on the carriage 1 side, an upper end pivotally supported on the work platform 10 side, and a lower end side on the lower side. The upper ladder portion 35 that overlaps the ladder portion 32 and the holding means 36 that holds the overlapping portions of the upper and lower ladder portions 32 and 35 so as to be able to move only relative to each other in the length direction in an overlapping state. The holding members 37 and 38 are attached to the left and right sides of the end portions of the upper and lower ladder portions 32 and 35 and hold the left and right sides of the mating ladder portions 35 and 32, and are attached to the inside of the holding members 37 and 38. And a synthetic resin sliding material 39.

上記請求項１、３、及び４に記載の本発明に係る台車式作業足場によれば、作業足場台は、台車に対して垂直に立設され且つ伸縮駆動手段により伸縮駆動される伸縮フレームの昇降上端部に支持される構成であるから、伸縮フレームに適度な太さを有せしめるだけで十分な曲げ強度を持たせることができ、斜めに伸縮する伸縮フレームで作業足場台を支持させる従来の構成のように、台車式作業足場全体の大重量化、延いては取り扱い作業性の低下、大幅なコストアップなどの不都合を伴うことなく、上昇せしめられた作業足場台の揺れを無くして安全に作業を行えるようにすると共に必要十分な耐久性を持たせることが極めて簡単容易に実現できる。しかも、作業足場台に対する昇り降り用の梯子は、上昇させた作業足場台に対して人手によって斜めに架設する必要はなく、作業足場台の高さに関係なく常に斜めに架設されており、いつでも安全容易に昇り降りすることができるので、作業性も向上する。 According to the cart type work scaffold according to the present invention as set forth in the first, third, and fourth aspects, the work platform is an extension frame that is erected vertically with respect to the cart and is telescopically driven by the telescopic drive means. Because it is configured to be supported by the upper and lower ends, it is possible to give sufficient bending strength just by giving the telescopic frame an appropriate thickness, and support the work platform with the telescopic frame that stretches diagonally As in the configuration, there is no inconvenience such as an increase in the weight of the entire platform work platform, a decrease in handling workability, and a significant cost increase, and it is possible to safely eliminate the shaking of the raised work platform. It is very easy and easy to perform the work and to provide the necessary and sufficient durability. In addition, the ladder for ascending / descending the work platform does not need to be installed diagonally by hand with respect to the raised work platform, and is always installed diagonally regardless of the height of the work platform. Since it can be ascending and descending easily and safely, workability is also improved.

又、請求項１に記載の本発明の構成によれば、台車手押し操作用バーを利用して台車の手押し移動を安全容易に行えるのであるが、当該左右一対の台車手押し操作用バーにより伸縮自在梯子を保護し得る効果と伸縮フレームに対する補強効果も得ることができる。また、左右両側から挟むように配置されたを架設することができる。又、伸縮自在梯子の少なくとも下部領域を昇り降りする際の手摺りに左右一対の台車手押し操作用バーを利用できるように構成することも可能であり、伸縮自在梯子に専用の手摺りを取り付ける必要性を無くすこともできる。更に、伸縮フレームの台車側固定フレーム部分には、その外側を覆うカバー材を張設することにより、伸縮フレームの伸縮動作時の粉塵の飛散などを抑えることができるので、先に説明したように、特にクリーンルーム内で使用される台車式作業足場として効果的に活用できるができるが、この場合、請求項２に記載の構成によれば、台車手押し操作用バーを利用して台車を手押し移動させる際の台車の進行方向前方の視認にカバー材が障害になることがなくなり、台車を安全に手押し移動させることができる。Further, according to the configuration of the present invention described in claim 1, the cart can be manually pushed and moved safely using the cart hand pushing operation bar. However, the cart can be expanded and contracted by the pair of left and right cart pushing operation bars. The effect which can protect a ladder and the reinforcement effect with respect to an expansion-contraction frame can also be acquired. In addition, it is possible to erection that is arranged so as to be sandwiched from both the left and right sides. In addition, it is possible to use a pair of left and right cart hand push operation bars for handrails when ascending and descending at least the lower region of the telescopic ladder, and it is necessary to attach a dedicated handrail to the telescopic ladder Sex can be lost. In addition, it is possible to suppress dust scattering during expansion / contraction operation of the expansion / contraction frame by stretching a cover material covering the outside of the fixed frame portion of the expansion / contraction frame, as explained above. In particular, it can be effectively used as a trolley-type work scaffold used in a clean room. In this case, according to the configuration of claim 2, the trolley is manually pushed and moved by using the trolley bar pushing bar. The cover material does not become an obstacle to visual recognition in the forward direction of the cart at the time, and the cart can be safely pushed and moved.

又、請求項３に記載の本発明の構成によれば、台車の平面サイズを必要最小限に抑えながら、作業足場台上に作業者が搭乗している作業時において、伸縮フレームから台車が突出しない側への台車（伸縮フレーム）の転倒の恐れをアウトリガーによって確実に防止することができ、安全性を必要最小限のアウトリガーによって高めることができるのであるが、台車四隅のアウトリガーの台車に対する突出方向を、作業時の台車周囲の構造物などの配置に応じて変えて、常に台車を最も安全な状態で位置決めすることができ、安全性を大幅に高めることができ、しかも、アウトリガーを使用しないときは、台車の側辺に沿わせた状態で係止させ、アウトリガーが台車の移動に邪魔になる恐れを無くすことができる。According to the third aspect of the present invention, the cart protrudes from the telescopic frame when the operator is on the work platform while minimizing the plane size of the cart. The outrigger can reliably prevent the trolley (extensible frame) from falling over to the side where it does not move, and safety can be enhanced by the minimum necessary amount of outrigger. Can be changed according to the arrangement of the structure around the cart during work, so that the cart can always be positioned in the safest state, greatly improving safety, and when the outrigger is not used Is locked in a state along the side of the carriage, and the possibility that the outrigger interferes with the movement of the carriage can be eliminated.

更に、請求項４に記載の本発明の構成によれば、伸縮フレームを水平に転倒させた状態でも、当該伸縮フレームの台車側固定フレーム部分の上端に配設された移動用車輪と、同一側の台車四隅下側の移動用車輪の内、前記移動用車輪と同一側にある左右一対の移動用車輪とを接地させて、全体を移動用車輪で安定的に支持させることができるので、台車式作業足場をトラックの荷台に対して積み下ろしする際や高さの狭い空間内で移動格納させる際などに便利である。Furthermore, according to the structure of this invention of Claim 4, even if the expansion-contraction frame is fallen horizontally, it is the same side as the movement wheel arrange | positioned at the upper end of the cart side fixed frame part of the said expansion-contraction frame. Since the pair of left and right moving wheels on the same side as the moving wheels among the moving wheels below the four corners of the bogie can be grounded, the whole can be stably supported by the moving wheels. This is convenient when loading and unloading a work platform from a truck bed or moving and storing it in a narrow space.

尚、請求項５に記載の構成によれば、前記作業足場台に併設された安全手摺り枠の存在により、作業足場台上での作業の安全性を高めることができるのであるが、この台車式作業足場を移動させるようなときには、安全手摺り枠を倒伏姿勢に切り換えて、この安全手摺り枠を含む全高を低くすることができるので、この台車式作業足場を移動させるときの安全性を高めると共に通行や格納が可能な領域を広げて汎用性を高めることができる。この場合、請求項６に記載の構成によれば、倒伏姿勢に切り換えられた安全手摺り枠を前記伸縮フレームの台車側固定フレーム部分に係止することにより、安全手摺り枠を倒伏姿勢に固定したままで伸縮フレームを伸長させて作業足場台を上昇させてしまう恐れがなくなり、安全手摺り枠を所期通り起立させた後に作業足場台を上昇させるという作業手順を遵守させ易くなる。In addition, according to the structure of Claim 5, the safety | security of the operation | work on a work scaffolding can be improved by presence of the safety handrail frame attached to the said working scaffolding. When moving the work platform, the safety handrail frame can be switched to the lying position, and the overall height including the safety handrail frame can be lowered. It is possible to increase versatility by expanding the area that can be passed and stored. In this case, according to the configuration of the sixth aspect, the safety handrail frame is fixed to the lying posture by locking the safety handrail frame switched to the lying posture to the carriage side fixed frame portion of the telescopic frame. Thus, there is no risk that the work platform is lifted by extending the telescopic frame, and it is easy to comply with the work procedure of raising the work platform after raising the safety handrail frame as expected.

又、請求項７に記載の構成によれば、伸縮フレームを伸縮させる伸縮駆動手段を、その操作ハンドルのみが伸縮フレームの外に配置されている状態で構成することができ、しかも駆動源としては、既製のチエンブロックやレバーブロックと呼称されているようなチエン巻き上げ繰り出し手段を活用することができ、安価に実施することができる。Moreover, according to the structure of Claim 7, the expansion-contraction drive means which expands / contracts an expansion-contraction frame can be comprised in the state in which only the operation handle is arrange | positioned outside the expansion-contraction frame, and also as a drive source Further, it is possible to use a chain winding and feeding means such as a ready-made chain block or lever block, which can be implemented at low cost.

又、請求項８に記載の構成によれば、伸縮フレームの台車側固定フレーム部分や昇降フレーム部分をアルミニウム成形材から成る角柱状部材を活用して軽量に構成することができるのであるが、当該角柱状部材が備える横断面奥広がり形の部材取付用溝を利用して昇降ガイド用ローラーの軸受け部材を角柱状部材の任意の高さに簡単容易に取り付けることができるだけでなく、各昇降ガイド用ローラーに設けられた大径鍔部を、当該ローラーの対接側の角柱状部材が備える部材取付用溝に嵌合させるようにしたので、当該ローラーの周面による相手側フレーム部分の位置決め、即ち、当該ローラーの軸心に対し直交する方向の位置決めと、ローラー大径鍔部による相手側フレーム部分の位置決め、即ち、当該ローラーの軸心方向の位置決めとを同時に行わせることができ、各方向の位置決めにそれぞれ専用のローラーを配置する場合と比較して、昇降ガイドローラーの総個数を大幅に削減し、コストダウンを図ることができる。Further, according to the configuration described in claim 8, the carriage side fixed frame portion and the lifting frame portion of the telescopic frame can be configured to be lightweight by utilizing a prismatic member made of an aluminum molding material. It is possible not only to easily and easily attach the bearing member of the lifting guide roller to an arbitrary height of the prismatic member by utilizing the member mounting groove with a wide cross section provided in the prismatic member, but for each lifting guide Since the large-diameter flange provided on the roller is fitted into the member mounting groove provided on the prism-shaped member on the contact side of the roller, the positioning of the counterpart frame portion by the peripheral surface of the roller, that is, , Positioning in the direction orthogonal to the axis of the roller, positioning of the counterpart frame portion by the roller large-diameter flange, that is, positioning of the roller in the axial direction Can be performed simultaneously, as compared with the case of arranging a dedicated rollers respectively positioned in each direction, significantly reducing the total number of elevation guide rollers, it is possible to reduce the cost.

更に、請求項９に記載の構成によれば、伸縮自在な梯子を簡単な構造で実現させることができると共に、作業足場台の昇降に伴う梯子の伸縮動作時の軋み音や粉塵の発生も抑えることができ、特にクリーンルーム内で使用される台車式作業足場として効果的に活用できる。Furthermore, according to the structure of Claim 9, while being able to implement | achieve an extendable ladder with a simple structure, generation | occurrence | production of the squeaking sound and dust at the time of the extension / contraction operation of the ladder accompanying raising / lowering of a working scaffold base is also suppressed. In particular, it can be effectively used as a carriage type work scaffold used in a clean room.

以下に本発明の具体的実施例を添付図に基づいて説明すると、図１〜図４において、１は台車であって、平面形状が前後方向に長い長方形の台枠２の四隅下側に移動用車輪３を配設すると共に、四隅にそれぞれ垂直支軸４の周りに水平揺動自在にアウトリガー５ａ〜５ｄが取り付けられている。６は伸縮フレームであって、台車１の長手方向の前端部上に垂直に立設された台車側固定フレーム部分７と、当該台車側固定フレーム部分７の内側に垂直に昇降自在に嵌合する昇降フレーム部分８と、伸縮駆動手段９とから構成されている。１０は作業足場台であって、伸縮フレーム６の昇降上端部、即ち、昇降フレーム部分８の上端部に水平に支持され、起伏自在な安全手摺り枠１１を備えている。１２は伸縮自在梯子であって、台車１の長手方向の前端部上と作業足場台１０（具体的には、伸縮フレーム６の昇降上端部、即ち、昇降フレーム部分８の上端部後側辺）との間に、斜めに傾斜する状態に架設されている。１３は台車手押し操作用バーであって、伸縮フレーム６の台車側固定フレーム部分７と台車１の長手方向の後端部上との間に、伸縮自在梯子１２の下半部を左右両側から挟むように左右一対架設されている。 DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 to 4, reference numeral 1 denotes a carriage, which moves to the lower corners of a rectangular frame 2 having a long planar shape in the front-rear direction. The wheels 3 are disposed, and the outriggers 5a to 5d are attached to the four corners so as to be swingable horizontally around the vertical support shaft 4, respectively. Reference numeral 6 denotes a telescopic frame, which is vertically fitted on a front end portion in the longitudinal direction of the carriage 1 and is vertically fitted to the inside of the carriage side fixed frame part 7 so as to be vertically movable. The lift frame portion 8 and the expansion / contraction drive means 9 are configured. Reference numeral 10 denotes a work platform, which includes a safety handrail frame 11 that is supported horizontally by the upper and lower end portions of the telescopic frame 6, that is, the upper end portion of the elevating frame portion 8, and that can be raised and lowered. Reference numeral 12 denotes a telescopic ladder, which is on the front end in the longitudinal direction of the carriage 1 and the work platform 10 (specifically, the upper and lower ends of the telescopic frame 6, that is, the rear side of the upper end of the upper and lower frame portion 8). In between, it is constructed in a slanting state. 13 is a bar for pushing the cart manually, and the lower half of the telescopic ladder 12 is sandwiched between the left and right sides between the cart-side fixed frame portion 7 of the telescopic frame 6 and the rear end of the cart 1 in the longitudinal direction. As shown in FIG.

以下、各部を詳細に説明すると、伸縮フレーム６の台車側固定フレーム部分７及び昇降フレーム部分８は、図５〜図７に示すように、それぞれ四隅にアルミニウム成形材から成る垂直向きの角柱状部材１４ａ〜１４ｄ，１５ａ〜１５ｄを備えたもので、これら垂直向きの角柱状部材１４ａ〜１４ｄ，１５ａ〜１５ｄを高さ方向の適当箇所で水平向きの角柱状部材１６，１６ａ，１７で連結一体化して構成されている。而して、全ての角柱状部材１４ａ〜１７は同一断面のものであって、台車１の台枠２も、角柱状部材１４ａ〜１７と同一断面の角柱状部材を矩形枠状に連結して構成されている。これら伸縮フレーム６の台車側固定フレーム部分７、昇降フレーム部分８、及び台車１の台枠２を構成する角柱状部材の四側面には、当該角柱状部材の長さ方向に連続する横断面奥広がり形（ハウス形）の部材取付用溝１８が、横断面形状が前後左右何れも対称形となるように設けられている。 Hereinafter, each part will be described in detail. As shown in FIGS. 5 to 7, the cart-side fixed frame portion 7 and the lifting frame portion 8 of the telescopic frame 6 are vertically oriented prismatic members made of aluminum moldings at four corners, respectively. 14a to 14d and 15a to 15d, and these vertically oriented prismatic members 14a to 14d and 15a to 15d are connected and integrated by horizontally oriented prismatic members 16, 16a and 17 at appropriate positions in the height direction. Configured. Thus, all the prismatic members 14a to 17 have the same cross section, and the base frame 2 of the carriage 1 also connects the prismatic members having the same cross section as the prismatic members 14a to 17 in a rectangular frame shape. It is configured. On the four side surfaces of the prismatic member constituting the cart side fixed frame portion 7 of the telescopic frame 6, the lifting frame portion 8, and the platform frame 2 of the cart 1, there is a transverse cross section continuous in the length direction of the prismatic member. A widened (house-shaped) member mounting groove 18 is provided so that the cross-sectional shape is symmetrical in both front and rear and left and right directions.

伸縮フレーム６の台車側固定フレーム部分７の上端部には、４つの昇降ガイドローラー１９が上下二段に軸支され、昇降フレーム部分８の下端部には４つの昇降ガイドローラー２０が軸支されている。これら昇降ガイドローラー１９，２０は、周面の幅方向の中央位置に、各角柱状部材の前記部材取付用溝１８に丁度嵌合する幅の大径鍔部１９ａ，２０ａを備えている。 Four elevating guide rollers 19 are pivotally supported in two upper and lower stages on the upper end portion of the cart side fixed frame portion 7 of the telescopic frame 6, and four elevating guide rollers 20 are pivotally supported on the lower end portion of the elevating frame portion 8. ing. These elevating guide rollers 19 and 20 are provided with large-diameter flange portions 19a and 20a having a width that fits just in the member mounting grooves 18 of the respective prismatic members at the center position in the width direction of the peripheral surface.

台車側固定フレーム部分７の上端部の各昇降ガイドローラー１９は、前後対を成す角柱状部材１４ａ，１４ｃ及び１４ｂ，１４ｄの互いに対面する内側面に取り付けられた軸受け部材２１にそれぞれ前後方向水平軸心の周りに自転可能に軸支されることにより、昇降フレーム部分８の各角柱状部材１５ａ〜１５ｄにおける左右方向の外側面に各ローラー１９の周面が隣接すると共に、当該左右方向の外側面の部材取付用溝１８に大径鍔部１９ａが嵌合している。また、昇降フレーム部分８の下端部の各昇降ガイドローラー２０は、前後対を成す角柱状部材１５ａ，１５ｃ及び１５ｂ，１５ｄの互いに背を向ける外側面に取り付けられた軸受け部材２２にそれぞれ前後方向水平軸心の周りに自転可能に軸支されることにより、台車側固定フレーム部分７の各角柱状部材１４ａ〜１４ｄにおける左右方向の内側面に各ローラー２０の周面が隣接すると共に、当該左右方向の内側面の部材取付用溝１８に大径鍔部２０ａが嵌合している。 Each elevating guide roller 19 at the upper end portion of the carriage side fixed frame portion 7 is provided with a horizontal horizontal axis on a bearing member 21 attached to inner surfaces facing each other of the prismatic members 14a, 14c and 14b, 14d forming a front-rear pair. By being pivotally supported around the center so as to be able to rotate, the circumferential surface of each roller 19 is adjacent to the lateral surface of each of the prismatic members 15a to 15d of the lifting frame portion 8 and the lateral surface of the lateral direction. The large-diameter flange 19a is fitted in the member mounting groove 18. Further, each lifting guide roller 20 at the lower end of the lifting frame portion 8 is horizontally horizontal in the front-rear direction on the bearing members 22 attached to the outer side surfaces of the prismatic members 15a, 15c and 15b, 15d forming a pair of front and rear. By being pivotally supported around the shaft center, the peripheral surface of each roller 20 is adjacent to the inner surface in the left-right direction of each prismatic member 14a-14d of the carriage side fixed frame portion 7, and the left-right direction A large-diameter flange portion 20a is fitted in the member mounting groove 18 on the inner surface of the inner surface.

軸受け部材２１，２２の取り付けは、角柱状部材１４ａ〜１５ｄの軸受け部材２１，２２の取り付け面に位置する部材取付用溝１８の奥端広幅部内に自転不能に遊嵌されたナット２３に軸受け部材２１，２２を貫通させたボルト２４の先端部を螺合締結することにより行われる。従って、ボルト２４を弛めるだけで、軸受け部材２１，２２の取り付け高さ、即ち、昇降ガイドローラー１９，２０の軸支高さを任意に調整することができる。また、図示省略しているが、台車１の台枠２と伸縮フレーム６の台車側固定フレーム部分７（垂直向きの角柱状部材１４ａ〜１４ｄ）との結合箇所を含めて、全ての角柱状部材どうしのＬ字形またはＴ字形の結合には、当該結合箇所の入り隅部に添えられる三角形またはＬ字形の結合金具が併用されるが、この結合金具の各側辺と各角柱状部材との結合も、前記部材取付用溝１８を利用したナット２３とボルト２４による軸受け部材２１，２２の取り付け方法と同様に行うことができる。 The bearing members 21 and 22 are attached to the nuts 23 that are loosely fitted in the wide end portions of the member mounting grooves 18 located on the mounting surfaces of the bearing members 21 and 22 of the prismatic members 14a to 15d so as not to rotate. This is done by screwing and fastening the front end of the bolt 24 that penetrates 21 and 22. Therefore, it is possible to arbitrarily adjust the mounting height of the bearing members 21, 22, that is, the shaft support height of the elevating guide rollers 19, 20 simply by loosening the bolt 24. Although not shown in the drawings, all the prismatic members including the connecting portion of the carriage 2 of the carriage 1 and the carriage-side fixed frame portion 7 (vertical prismatic members 14a to 14d) of the telescopic frame 6 are included. For joining L-shaped or T-shaped to each other, a triangular or L-shaped coupling fitting attached to the corner of the coupling portion is used together. The coupling between each side of the coupling fitting and each prismatic member is used. Can also be performed in the same manner as the mounting method of the bearing members 21 and 22 by the nut 23 and the bolt 24 using the member mounting groove 18.

上記の伸縮フレーム６の構成によれば、台車側固定フレーム部分７に対して昇降する昇降フレーム部分８は、台車側固定フレーム部分７が備える各昇降ガイドローラー１９の周面と当該ローラー周面に対して左右方向に隣接する昇降フレーム部分８側の角柱状部材１５ａ〜１５ｄの側面、及びこの昇降フレーム部分８が備える各昇降ガイドローラー２０の周面と当該ローラー周面に対して左右方向に隣接する台車側固定フレーム部分７側の角柱状部材１４ａ〜１４ｄの側面によって、左右横方向に関して位置決めされ、前後方向に関しては、台車側固定フレーム部分７が備える各昇降ガイドローラー１９の大径鍔部１９ａと当該大径鍔部１９ａが嵌合する昇降フレーム部分８側の角柱状部材１５ａ〜１５ｄの部材取付用溝１８、及びこの昇降フレーム部分８が備える各昇降ガイドローラー２０の大径鍔部２０ａと当該大径鍔部２０ａが嵌合する台車側固定フレーム部分７側の角柱状部材１４ａ〜１４ｄの部材取付用溝１８によって位置決めされ、前後方向の位置決めのための昇降ガイドローラーを使用していないにもかかわらず、垂直姿勢を保って円滑に昇降することができる。 According to the configuration of the telescopic frame 6 described above, the lifting frame portion 8 that moves up and down with respect to the cart side fixed frame portion 7 is provided on the circumferential surface of each lifting guide roller 19 provided on the cart side fixed frame portion 7 and the roller circumferential surface. In contrast, the side surfaces of the prismatic members 15a to 15d on the side of the lifting frame portion 8 adjacent in the left-right direction, the peripheral surface of each lifting guide roller 20 provided in the lifting frame portion 8 and the roller peripheral surface are adjacent in the left-right direction. Positioned with respect to the left and right lateral directions by the side surfaces of the prismatic members 14a to 14d on the cart side fixed frame portion 7 to be performed, and in the front-rear direction, the large diameter flange portion 19a of each lifting guide roller 19 provided in the cart side fixed frame portion 7 is provided. And the member mounting groove 18 of the prismatic members 15a to 15d on the lifting frame portion 8 side into which the large-diameter flange portion 19a is fitted, and the lifting / lowering Positioned by the member mounting grooves 18 of the prismatic members 14a to 14d on the side of the carriage-side fixed frame portion 7 where the large-diameter flange 20a of each lifting guide roller 20 provided in the ram portion 8 and the large-diameter flange 20a are fitted. Although the elevating guide roller for positioning in the front-rear direction is not used, the elevating and lowering can be performed smoothly while maintaining the vertical posture.

伸縮フレーム６を伸縮駆動する伸縮駆動手段９は、チエン巻き上げ繰り出し手段２５を利用したものである。このチエン巻き上げ繰り出し手段２５は、一般にレバーブロックと呼称されるもので、図１、図２、及び図９に示すように、昇降フレーム部分８が図１に示す上昇限位置にあるときに、当該昇降フレーム部分８の下端より上方で当該昇降フレーム部分８の内側ほぼ中央に位置するように、台車側固定フレーム部分７の中間高さにある左右一対の水平向きの角柱状部材１６ａを利用して昇降フレーム部分８内を横断するように架設された水平梁材２６に吊り下げられている。そしてこのチエン巻き上げ繰り出し手段２５により巻き上げ繰り出し操作されるチエン２７の端部が昇降フレーム部分８の下端ほぼ中央位置に係止され、当該チエン２７を巻き込んだときにチエン巻き上げ繰り出し手段２５から繰り出されて垂下するチエン２７の遊端部が上向きにＵターンした状態で前記水平梁材２６に係止されている。チエン巻き上げ繰り出し手段２５は、左右水平方向片側に延出し且つ前記水平梁材２６の一端を支持する片側の角柱状部材１６ａの下側に取り付けられた軸受け２８により支承される回転操作軸２５ａと、台車側固定フレーム部分７の横外側に位置するように前記回転操作軸２５ａの外端部に取り付けられた操作ハンドル２９とを備えている。 The expansion / contraction driving means 9 for extending / contracting the expansion / contraction frame 6 uses a chain winding and feeding means 25. The chain hoisting and feeding means 25 is generally called a lever block. As shown in FIGS. 1, 2, and 9, when the lifting frame portion 8 is in the ascending limit position shown in FIG. Using a pair of left and right horizontally oriented prismatic members 16a located at the intermediate height of the carriage side fixed frame portion 7 so as to be positioned at the center of the inside of the lift frame portion 8 above the lower end of the lift frame portion 8. It is suspended by a horizontal beam member 26 laid so as to cross the inside of the elevating frame portion 8. Then, the end portion of the chain 27 that is operated to be rolled up by the chain winding and unwinding means 25 is locked at the substantially central position of the lower end of the elevating frame portion 8, and when the chain 27 is wound, the chain 27 is unwound from the chain winding and unwinding means 25. The free end portion of the hanging chain 27 is locked to the horizontal beam member 26 in a U-turn upward. The chain hoisting and feeding means 25 includes a rotation operation shaft 25a that is supported by a bearing 28 that is attached to the lower side of the one-side prismatic member 16a that extends to one side in the horizontal direction and supports one end of the horizontal beam member 26; And an operation handle 29 attached to an outer end portion of the rotation operation shaft 25a so as to be positioned laterally outside the cart-side fixed frame portion 7.

従って、操作ハンドル２９をチエン巻き込み方向に回転操作してチエン２７をチエン巻き上げ繰り出し手段２５により巻き上げることにより、図２に示すように、台車側固定フレーム部分７に対して下降限位置にあった昇降フレーム部分８を、図１に示す上昇限位置まで当該チエン２７で吊り上げ、伸縮フレーム６を伸長させて作業足場台１０を上昇限位置まで上昇させることができる。逆に、回転操作ハンドル２９をチエン繰り出し方向に逆回転操作してチエン２７をチエン巻き上げ繰り出し手段２５から繰り出すことにより、図１に示すように、台車側固定フレーム部分７に対して上昇限位置にあった昇降フレーム部分８を、図２に示す下降限位置までチエン２７の繰り出しに応じて重力で降下させ、伸縮フレーム６を縮小させて作業足場台１０を下降限位置まで降下させることができる。 Accordingly, by rotating the operating handle 29 in the chain winding direction and winding the chain 27 by the chain winding and unwinding means 25, as shown in FIG. The frame portion 8 can be lifted by the chain 27 to the ascending limit position shown in FIG. 1 and the telescopic frame 6 can be extended to raise the work scaffold 10 to the ascending limit position. Conversely, by rotating the rotation operation handle 29 in the reverse direction of the chain and extending the chain 27 from the chain winding and unwinding means 25, as shown in FIG. The raised / lowered frame portion 8 can be lowered by gravity according to the extension of the chain 27 to the lower limit position shown in FIG. 2, and the telescopic frame 6 can be reduced to lower the work platform 10 to the lower limit position.

伸縮自在梯子１２は、図１及び図２に示すように、下端部が台車１の台枠２の後端部上に左右水平支軸３１により前後揺動自在に軸支された下側梯子部分３２と、上端部が作業足場台１０側、具体的には伸縮フレーム６の昇降フレーム部分８の上端部後側辺から後方に突設された支持部材３３、に左右水平支軸３４により前後揺動自在に軸支された上側梯子部分３５、及び上下両梯子部分３２，３５の遊端部分を互いに重なり状態に保持する保持手段３６から構成されたもので、下端側ほど伸縮フレーム６から後方に離れるように傾斜している。前記保持手段３６は、図８にも示すように、上側梯子部分３５の下端部外側（作業者が昇り降りする側）に重なる下側梯子部分３２の上端部の左右両側に取り付けられて、上側梯子部分３５の左右両側枠３５ａ，３５ｂを左右両側から抱き抱える左右一対のＬ形保持部材３７と、上側梯子部分３５の下端部の左右両側に取り付けられて、下側梯子部分３２の左右両側枠３２ａ，３２ｂを左右両側から抱き抱える左右一対のＬ形保持部材３８を備えており、これら各Ｌ形保持部材３７，３８のＬ形内側面には、合成樹脂製滑り材３９が張設されている。３２ｃ，３５ｃは、左右両側枠３２ａ，３２ｂ間、及び左右両側枠３５ａ，３５ｂ間にそれぞれ長さ方向同一間隔おきに架設されたステップ部材である。 As shown in FIGS. 1 and 2, the telescopic ladder 12 has a lower ladder portion whose lower end is pivotally supported by a left and right horizontal support shaft 31 on the rear end portion of the frame 2 of the carriage 1 so as to be swingable back and forth. 32 and a support member 33 projecting backward from the rear side of the upper end of the lifting frame portion 8 of the telescopic frame 6 on the work platform 10 side, specifically, the support frame 33 by the left and right horizontal support shaft 34. The upper ladder portion 35 is pivotally supported, and the holding means 36 holds the free end portions of the upper and lower ladder portions 32 and 35 so as to overlap each other. Inclined to leave. As shown in FIG. 8, the holding means 36 is attached to the left and right sides of the upper end portion of the lower ladder portion 32 that overlaps the lower end portion of the upper ladder portion 35 (the side on which the operator ascends and descends). A pair of left and right L-shaped holding members 37 that hold the left and right side frames 35a and 35b of the ladder portion 35 from both the left and right sides, and left and right side frames of the lower ladder portion 32 attached to the left and right sides of the lower end portion of the upper ladder portion 35. A pair of left and right L-shaped holding members 38 for holding 32a and 32b from both left and right sides are provided, and a synthetic resin sliding material 39 is stretched on the L-shaped inner surface of each of the L-shaped holding members 37 and 38. Yes. 32c and 35c are step members that are installed between the left and right side frames 32a and 32b and between the left and right side frames 35a and 35b at equal intervals in the length direction.

上記の伸縮自在梯子１２の構成によれば、Ｌ形保持部材３７，３８によって上下両梯子部分３２，３５は、その端部の重なり部分において長さ方向の相対移動のみ可能に連結されていることになり、伸縮自在梯子１２の伸縮動作時には、下側梯子部分３２の上端部の左右一対のＬ形保持部材３７は、その内側の合成樹脂製滑り材３９を介して上側梯子部分３５の左右両側枠３５ａ，３５ｂに対しその長さ方向に相対摺接移動し、上側梯子部分３５の下端部の左右一対のＬ形保持部材３８は、その内側の合成樹脂製滑り材３９を介して下側梯子部分３２の左右両側枠３２ａ，３２ｂに対しその長さ方向に相対摺接移動することになる。而して、伸縮フレーム６を伸長させて作業足場台１０を上昇させたとき、上側梯子部分３５が下側梯子部分３２に対して上方に引き上げられ、伸縮自在梯子１２全体の傾斜角度が小さくなる方向に変化しながら伸縮自在梯子１２が伸長することになり、逆に伸縮フレーム６を縮小させて作業足場台１０を降下させたとき、上側梯子部分３５が下側梯子部分３２に対して降下し、伸縮自在梯子１２全体の傾斜角度が大きくなる方向に変化しながら伸縮自在梯子１２が縮小することになる。即ち、台車１に対する作業足場台１０の高さに関係なく、傾斜した姿勢のままの伸縮自在梯子１２が台車１と作業足場台１０との間を繋いでおり、作業者は、この傾斜した姿勢の伸縮自在梯子１２を利用して作業足場台１０に対し安全且つ容易に昇り降りすることができる。 According to the configuration of the telescopic ladder 12 described above, the upper and lower ladder portions 32 and 35 are connected by the L-shaped holding members 37 and 38 so that only relative movement in the length direction is possible at the overlapping portions of the end portions. When the telescopic ladder 12 is expanded and contracted, the pair of left and right L-shaped holding members 37 at the upper end of the lower ladder portion 32 are connected to the left and right sides of the upper ladder portion 35 via the synthetic resin sliding material 39 inside. The pair of left and right L-shaped holding members 38 at the lower end portion of the upper ladder portion 35 are moved in relative sliding movement with respect to the frames 35a and 35b, and the lower ladder through the synthetic resin sliding material 39 inside thereof. The left and right side frames 32a and 32b of the portion 32 move relative to each other in the length direction. Thus, when the work frame 10 is lifted by extending the telescopic frame 6, the upper ladder portion 35 is pulled upward with respect to the lower ladder portion 32, and the tilt angle of the entire telescopic ladder 12 is reduced. The telescopic ladder 12 is extended while changing the direction. Conversely, when the working frame 10 is lowered by reducing the telescopic frame 6, the upper ladder portion 35 is lowered with respect to the lower ladder portion 32. The telescopic ladder 12 is contracted while the inclination angle of the entire telescopic ladder 12 is changed in the increasing direction. That is, regardless of the height of the work platform 10 with respect to the carriage 1, the telescopic ladder 12 that remains in an inclined posture connects the carriage 1 and the work platform 10, and the operator can use this inclined posture. It is possible to ascend and descend safely and easily with respect to the work platform 10 by using the telescopic ladder 12.

安全手摺り枠１１は、図１〜図４に示されるように、左右両側枠４０と当該左右両側枠４０どうしを伸縮自在梯子１２のある側とは反対側で連結一体化する前側枠４１、及び左右両側枠４０の伸縮自在梯子１２のある側に掛け外し自在に架設された手摺りバー４２から構成されたもので、左右両側枠４０の伸縮自在梯子１２のある側とは反対側の支柱部下端が作業足場台１０の左右両側前端部（伸縮自在梯子１２のある側とは反対側）に左右水平向きの互いの同心状の支軸４３で軸支され、当該支軸４３の周りに前方へ回転起立させることにより、図１及び図３に示すように、平面視において作業足場台１０の周囲を取り囲む起立姿勢に切り換え、支軸４３の周りに後方へ回転倒伏させることにより、図２及び図４に示すように、伸縮フレーム６の上端部と伸縮自在梯子１２の上端部とに被さる倒伏姿勢に切り換えることができる。尚、手摺りバー４２は左右両側枠４０間に固定しても良い。 As shown in FIGS. 1 to 4, the safety handrail frame 11 includes a front side frame 41 for connecting and integrating the left and right side frames 40 and the left and right side frames 40 on the side opposite to the side where the telescopic ladder 12 is provided, And a handrail bar 42 that is detachably mounted on the side of the left and right side frames 40 on the side where the extendable ladder 12 is provided. The lower ends of the work are pivotally supported on the left and right front ends of the work platform 10 (on the side opposite to the side where the telescopic ladder 12 is provided) by left and right horizontal concentric support shafts 43, around the support shaft 43. By rotating and standing forward, as shown in FIG. 1 and FIG. 3, the plane is switched to a standing posture that surrounds the periphery of the work platform 10 in a plan view, and rotated and tilted backward around the support shaft 43, so that FIG. And as shown in FIG. It can be switched to horizontal position overlying the upper end portion of the 6 upper part and telescopic ladder 12. The handrail bar 42 may be fixed between the left and right side frames 40.

上記安全手摺り枠１１は、ロック手段４４を備えている。このロック手段４４は、安全手摺り枠１１における左右両側枠４０の伸縮自在梯子１２のある側の支柱部下端に設けられたグリップ付きボルト４５と、作業足場台１０の左右両側辺に設けられて前記起立姿勢にあるときにグリップ付きボルト４５を螺入締結し得るネジ孔４６（図２参照）と、伸縮フレーム６の台車側固定フレーム部分７の前側左右一対の角柱状部材１４ａ，１４ｂに設けられて前記倒伏姿勢にあるときにグリップ付きボルト４５を螺入締結し得るネジ孔４７（図１参照）とから構成されている。 The safety handrail frame 11 includes locking means 44. The locking means 44 is provided on the left and right sides of the work platform 10 and the bolts 45 with grips provided at the lower ends of the support columns on the side where the telescopic ladder 12 of the left and right side frames 40 of the safety handrail frame 11 is provided. A screw hole 46 (see FIG. 2) through which a bolt 45 with a grip can be screwed and fastened when in the standing posture, and a pair of prismatic members 14a and 14b on the front left and right sides of the carriage-side fixed frame portion 7 of the telescopic frame 6 are provided. And a screw hole 47 (see FIG. 1) through which the grip bolt 45 can be screwed and fastened when in the lying posture.

アウトリガー５ａ〜５ｄは、図３の仮想線と図４に示すように、台車１の台枠２の左右両側辺に沿う退入姿勢から台枠２より離れる方向にほぼ１８０度の範囲内で垂直支軸４の周りに水平に揺動させることができるもので、その先端部には、ネジジャッキ４８により昇降させることができる接地盤４９が配設されている。また、各アウトリガー５ａ〜５ｄを台枠２の左右両側辺に沿う退入姿勢において係止する係止具５０ａ〜５０ｄが設けられている。この係止具５０ａ〜５０ｄは、各アウトリガー５ａ〜５ｄに取り付けられた被キャッチ部材５１と、台枠２側に取り付けられて当該被キャッチ部材５１を弾性力で自動把持し得るキャッチ部材５２とから成るものである。従って、使用するアウトリガー５ａ〜５ｄは、係止具５０ａ〜５０ｄで係止されている退入姿勢から当該係止具５０ａ〜５０ｄの把持弾性力に抗して強く引き離すだけで、任意の角度まで水平に回転させることができ、使用しなくなったアウトリガー５ａ〜５ｄは、台枠２の左右両側辺に沿う退入姿勢まで回転させて係止具５０ａ〜５０ｄにより自動係止させ、自然に台枠２から離れるように回転するのを防止できる。 The outriggers 5a to 5d are perpendicular within a range of approximately 180 degrees in a direction away from the frame 2 from the retracted posture along the left and right sides of the frame 2 of the carriage 1 as shown in the phantom line of FIG. 3 and FIG. A grounding board 49 that can be swung horizontally around the support shaft 4 and that can be moved up and down by a screw jack 48 is disposed at the tip thereof. Moreover, the locking tools 50a-50d which lock each outrigger 5a-5d in the retracted attitude | position along the right-and-left both sides of the frame 2 are provided. The locking members 50a to 50d include a member 51 to be caught attached to each of the outriggers 5a to 5d, and a catch member 52 that is attached to the frame 2 and can automatically grip the member 51 to be caught by an elastic force. It consists of. Accordingly, the outriggers 5a to 5d to be used can be separated from the retracted position locked by the locking tools 50a to 50d to an arbitrary angle simply by pulling them strongly against the gripping elastic force of the locking tools 50a to 50d. The outriggers 5a to 5d that can be rotated horizontally and are no longer used are rotated to the retracted posture along the left and right sides of the frame 2 and are automatically locked by the locking tools 50a to 50d. Rotating away from 2 can be prevented.

作業現場まで移動用車輪３を利用するなどして搬入された台車式作業足場の使用方法を説明すると、各アウトリガー５ａ〜５ｄを垂直支軸４の周りに回転させて、退入姿勢から台車１の外側へ適当角度で張り出す作用姿勢に切り換えると共に、先端の接地盤４９をネジジャッキ４８により降下させて適当圧力で接地させ、台車１を定位置に固定する。尚、アウトリガー５ａ〜５ｄは、その全てを前記作用姿勢に切り換える必要はなく、例えば台車１が壁などの建造物に接近していて当該建造物側には転倒の恐れが無いときは、他の方向に張り出させることができるアウトリガーのみを作用姿勢に切り換えたり、その台車１からの張り出し量や張り出し方向なども、台車１の周囲の状況に応じて任意に決定することができる。若し、台車１の周囲全域に十分な床上空間が確保されている状況であれば、例えば図３に実線で示すように、伸縮フレーム６が台車１の前端に配置されていることを考慮して、前端側の左右一対のアウトリガー５ａ，５ｂは台車１から前方へ互いに平行に、または少し先端広がりになる向きに張り出させ、台車１の左右横幅が伸縮フレーム６（作業足場台１０）の左右横幅と殆ど同じであることを考慮して、後端側左右一対のアウトリガー５ｃ，５ｄは台車から左右横向きに張り出させるのが良い。 The usage method of the carriage type work scaffold carried in by using the moving wheel 3 to the work site will be described. The outriggers 5a to 5d are rotated around the vertical support shaft 4 to move the carriage 1 from the retracted posture. Is switched to an action posture projecting outside at an appropriate angle, and the grounding board 49 at the tip is lowered by a screw jack 48 and grounded at an appropriate pressure to fix the carriage 1 at a fixed position. The outriggers 5a to 5d do not need to switch all of them to the action posture. For example, when the carriage 1 is approaching a building such as a wall and there is no fear of the building falling, Only the outriggers that can be projected in the direction can be switched to the action posture, and the amount and direction of the projection from the carriage 1 can be arbitrarily determined according to the situation around the carriage 1. If a sufficient floor space is secured around the entire area of the carriage 1, it is considered that the telescopic frame 6 is disposed at the front end of the carriage 1 as shown by a solid line in FIG. Thus, the pair of left and right outriggers 5a, 5b on the front end side is projected forward from the carriage 1 in a direction parallel to each other or slightly extended so that the lateral width of the carriage 1 is equal to that of the telescopic frame 6 (working platform 10). Considering that it is almost the same as the left and right lateral width, the pair of left and right outriggers 5c and 5d on the rear end side are preferably extended laterally from the carriage.

上記のようにアウトリガー５ａ〜５ｄを利用して台車１を定位置に安定的に固定したならば、先に説明したように伸縮フレーム６を伸長させて作業足場台１０を上昇させるのであるが、上記実施形態では、縮小状態にある伸縮フレーム６の伸長はロック手段４４で台車側固定フレーム部分７に係止されている倒伏状態の安全手摺り枠１１によって阻止されているので、伸縮フレーム６を伸長させる前にロック手段４４のグリップ付きボルト４５を弛めて、倒伏状態での安全手摺り枠１１のロックを解除する。そして安全手摺り枠１１を水平支軸４３の周りに上方に回転させて起立させ、グリップ付きボルト４５を作業足場台１０側のネジ孔４６（図２参照）に螺合して安全手摺り枠１１を図１に示す起立姿勢にロックする。 If the carriage 1 is stably fixed at a fixed position using the outriggers 5a to 5d as described above, the work frame platform 10 is raised by extending the telescopic frame 6 as described above. In the above embodiment, the expansion of the telescopic frame 6 in the contracted state is prevented by the safety railing frame 11 in the fallen state that is locked to the cart side fixed frame portion 7 by the locking means 44. Before extending, the bolt 45 with the grip of the locking means 44 is loosened to unlock the safety handrail frame 11 in the lying state. Then, the safety handrail frame 11 is rotated up around the horizontal support shaft 43 to stand up, and the bolt 45 with grip is screwed into the screw hole 46 (see FIG. 2) on the work platform 10 side to secure the safety handrail frame. 11 is locked in the standing posture shown in FIG.

安全手摺り枠１１を起立姿勢に切り換えたならば、伸縮駆動手段９を操作して伸縮フレーム６を伸長させ、作業足場台１０を図１に示す上昇限位置、またはこれよりも低い任意の高さまで上昇させる。このとき、伸縮自在梯子１２も多少の角度変化を伴いながら引き伸ばされる。伸縮駆動手段９に利用されているチエン巻き取り繰り出し手段２５が、作業足場台１０にかかる最大積載荷重に対しても重力による伸縮フレーム６の縮小動作（作業足場台１０の重力による降下）を確実に阻止できるものであるときは、伸縮駆動手段９の操作により作業足場台１０を所定の高さまで上昇させ終わったならば直ちに作業足場台１０への作業者の搭乗を開始させることができるが、そのような能力を持たない伸縮駆動手段９である場合、或いは必要な能力は備えているが安全性を一層高める場合には、適当な落下防止手段を併用するのが望ましい。 When the safety handrail frame 11 is switched to the standing posture, the telescopic drive means 9 is operated to extend the telescopic frame 6, and the work platform 10 is moved to the ascending limit position shown in FIG. Raise it up. At this time, the extendable ladder 12 is also stretched with some change in angle. The chain take-up / feeding means 25 used for the extension / contraction drive means 9 ensures the reduction operation of the extension / contraction frame 6 due to gravity (lowering due to the gravity of the work platform 10) even for the maximum load applied to the work platform 10. If the work platform 10 has been raised to a predetermined height by operating the telescopic drive means 9, the operator can start boarding the work platform 10 immediately. When the expansion / contraction drive means 9 does not have such ability, or when it has the necessary ability but further increases safety, it is desirable to use an appropriate fall prevention means together.

図１０に基づいて、本実施形態における構成に組み合わせることができる落下防止手段の一例を説明すると、この図１０に示す落下防止手段５３は、伸縮フレーム６における昇降フレーム部分８の１つの垂直向きの角柱状部材１５ｃにその長さ方向に沿って取り付けられ且つ長さ方向一定間隔おきに水平方向の貫通係止孔５４を備えた帯状部材５５と、台車側固定フレーム部分７の水平向きの角柱状部材１６の内、伸縮フレーム６の伸長長さに関係なく常に前記帯状部材５５の外側に隣接する位置にある中間高さの角柱状部材１６ａに、前記貫通係止孔５４と択一的に合致する水平方向のピン孔５６と、当該ピン孔５６と選択された１つの貫通係止孔５４とにわたって挿入離脱自在な係止ピン５７と、当該係止ピン５７を使用しないときに下向きに差し込んで係止ピン５７を保持できる係止ピン保持板５８と、紛失防止のために係止ピン５７と係止ピン保持板５８とを繋ぐチエン、ワイヤーロープなどの索条体５９とから構成されている。 An example of the fall prevention means that can be combined with the configuration in the present embodiment will be described based on FIG. 10. The fall prevention means 53 shown in FIG. 10 has one vertical orientation of the elevating frame portion 8 in the telescopic frame 6. A strip-like member 55 attached to the prism-like member 15c along its length direction and provided with horizontal through-holes 54 at regular intervals in the length direction, and a horizontally-oriented prismatic shape of the carriage-side fixed frame portion 7 Regardless of the extension length of the telescopic frame 6 among the members 16, the prismatic member 16a having an intermediate height that is always adjacent to the outside of the belt-like member 55 is alternatively matched with the through-locking hole 54. A horizontal pin hole 56, a locking pin 57 that can be inserted and removed freely across the pin hole 56 and one selected through locking hole 54, and a lower pin when the locking pin 57 is not used. A locking pin holding plate 58 that can be inserted into the cable to hold the locking pin 57, and a cable body 59 such as a chain or a wire rope that connects the locking pin 57 and the locking pin holding plate 58 to prevent loss. It is configured.

上記構成の落下防止手段５３では、伸縮フレーム６を最大長さまで伸長させて作業足場台１０を上昇限位置まで上昇させたとき、最下位の貫通係止孔５４とピン孔５６とが合致するように構成され、作業足場台１０をそれ以下の高さで使用するときは、１つの貫通係止孔５４とピン孔５６とが合致する高さまで作業足場台１０を上昇させる。何れにしても、作業足場台１０を所定高さまで上昇させたならば、そのとき合致する１つの貫通係止孔５４とピン孔５６とにわたって係止ピン５７を差し込み、伸縮フレーム６における台車側固定フレーム部分７と昇降フレーム部分８とを係止ピン５７により互いに係止し、昇降フレーム部分８の降下を伴う作業足場台１０の不測の降下を係止ピン５７により確実に防止し、安全性を高めることができる。 In the fall prevention means 53 configured as described above, when the telescopic frame 6 is extended to the maximum length and the work platform 10 is raised to the ascending limit position, the lowest penetration locking hole 54 and the pin hole 56 are matched. When the work scaffold base 10 is used at a height lower than that, the work scaffold base 10 is raised to a height at which one through-locking hole 54 and the pin hole 56 match. In any case, when the work platform 10 is raised to a predetermined height, the locking pin 57 is inserted over the one through locking hole 54 and the pin hole 56 that coincide with each other, and the carriage side fixing in the telescopic frame 6 is performed. The frame portion 7 and the lifting frame portion 8 are locked to each other by a locking pin 57, and the locking pin 57 reliably prevents an unexpected lowering of the work platform 10 accompanied by the lowering of the lifting frame portion 8, thereby enhancing safety. Can be increased.

作業足場台１０を所定の高さまで上昇させたならば、当該作業足場台１０によって上側梯子部分３５が引き上げられて伸長状態になっている伸縮自在梯子１２を利用して作業者は作業足場台１０に昇り、当該作業足場台１０上で所定の高所作業を行うことができる。 When the work scaffold base 10 is raised to a predetermined height, the worker uses the telescopic ladder 12 in which the upper ladder portion 35 is pulled up by the work scaffold base 10 and is in an extended state. The predetermined height work can be performed on the work platform 10.

尚、伸縮自在梯子１２は、図１に示すように作業足場台１０が上昇限位置まで上げられたとき、下側梯子部分３２の上端側ステップ部材３２ｃと上側梯子部分３５の下端側ステップ部材３５ｃとがほぼ同一レベルで前後に並列するように構成し、この伸縮自在梯子１２と上記構成の落下防止手段５３を採用する場合、貫通係止孔５４の間隔は、伸縮自在梯子１２のステップ部材３２ｃ，３５ｃの間隔と同一かまたは整数分の１（１／２〜１／４程度）とするのが望ましい。即ち、伸縮自在梯子１２を昇り降りする作業者が、上下両梯子部分３２，３５の重なり部分において、手前にある下側梯子部分３２のステップ部材３２ｃに足を掛ける動作が奥側にある上側梯子部分３５のステップ部材３５ｃによって妨害されないかまたは、妨害され難いように構成するのが望ましい。 As shown in FIG. 1, the telescopic ladder 12 is configured such that when the work platform 10 is raised to the upper limit position, the upper end step member 32 c of the lower ladder portion 32 and the lower end step member 35 c of the upper ladder portion 35. Are arranged in parallel at the front and rear at substantially the same level, and when the telescopic ladder 12 and the fall prevention means 53 having the above configuration are employed, the interval between the through-holes 54 is set at the step member 32c of the telescopic ladder 12. , 35c, or 1 / integer (about 1/2 to 1/4). That is, the operator who goes up and down the telescopic ladder 12 is placed on the upper ladder in which the step of placing the foot on the step member 32c of the lower ladder portion 32 at the front in the overlapping portion of the upper and lower ladder portions 32 and 35 is provided. It is desirable that the configuration is such that the step member 35c of the portion 35 is not obstructed or hardly obstructed.

また、伸縮自在梯子１２を昇り降りする作業者が、当該伸縮自在梯子１２の左右両側に位置する台車手押し操作用バー１３の後側垂直部分１３ａを手摺り代わりに使用できるように、図１に示すように、当該台車手押し操作用バー１３の後側垂直部分１３ａを伸縮自在梯子１２よりも適当距離だけ後方に突出しているように構成しておくことができる。 Further, FIG. 1 shows that an operator who goes up and down the telescopic ladder 12 can use the rear vertical portion 13a of the cart hand pushing operation bar 13 located on the left and right sides of the telescopic ladder 12 instead of a handrail. As shown, the rear vertical portion 13a of the cart hand pushing operation bar 13 can be configured to protrude rearward from the telescopic ladder 12 by an appropriate distance.

作業が終わって台車式作業足場を片づけるときは、落下防止手段５３の係止ピン５７を貫通係止孔５４及びピン孔５６から抜取り、その係止ピン５７を係止ピン保持板５８の垂直なピン孔に下向きに差し込んで保持させた後、伸縮駆動手段９を操作して伸縮フレーム６を縮小させ、昇降フレーム部分８およびその上端の作業足場台１０を下降限位置まで降下させる。この状態で落下防止手段５３の最上位の貫通係止孔５４がピン孔５６と合致するように構成されているときは、その最上位の貫通係止孔５４とピン孔５６とにわたって係止ピン５７を差し込み、伸縮フレーム６を伸長不能な状態に切り換えることもできる。 When the work-type scaffolding is cleared after the work is finished, the locking pin 57 of the fall prevention means 53 is removed from the through-hole locking hole 54 and the pin hole 56, and the locking pin 57 is perpendicular to the locking pin holding plate 58. Then, the telescopic drive means 9 is operated to reduce the telescopic frame 6, and the elevating frame portion 8 and the work platform 10 at the upper end thereof are lowered to the lower limit position. In this state, when the uppermost through locking hole 54 of the fall preventing means 53 is configured to match the pin hole 56, the locking pin extends over the uppermost through locking hole 54 and the pin hole 56. 57 can be inserted to switch the telescopic frame 6 to an unextendable state.

作業足場台１０を下降限位置まで降下させたならば、安全手摺り枠１１を起立姿勢にロックしているロック手段４４のグリップ付きボルト４５を弛めてロックを解除し、当該安全手摺り枠１１を水平支軸４３の周りに後方下方へ回転させて、図２に示すように伸縮フレーム６の上端部及び伸縮自在梯子１２の上端部に覆いかぶさる倒伏姿勢に切り換える。そしてロック手段４４のグリップ付きボルト４５を台車側固定フレーム部分７のネジ孔４７（図１参照）に螺合締結し、安全手摺り枠１１を倒伏姿勢でロックする。 When the work platform 10 is lowered to the lower limit position, the bolt 45 with the grip of the locking means 44 that locks the safety handrail frame 11 in the standing posture is released to release the lock, and the safety handrail frame is released. 11 is rotated rearward and downward around the horizontal support shaft 43 to switch to a lying posture covering the upper end of the telescopic frame 6 and the upper end of the telescopic ladder 12 as shown in FIG. And the bolt 45 with a grip of the locking means 44 is screwed and fastened to the screw hole 47 (see FIG. 1) of the carriage side fixed frame portion 7, and the safety handrail frame 11 is locked in the lying posture.

この後、作用姿勢にあったアウトリガー５ａ〜５ｄの接地盤４９をそのネジジャッキ４８により上昇させると共に、当該アウトリガー５ａ〜５ｄを垂直支軸４の周りに回転させて台車１の左右両側辺に沿う退入姿勢に切り換える。このとき各アウトリガー５ａ〜５ｄは、係止具５０ａ〜５０ｄによって自動的に退入姿勢で係止保持される。 Thereafter, the grounding board 49 of the outriggers 5a to 5d in the acting posture is raised by the screw jack 48, and the outriggers 5a to 5d are rotated around the vertical support shaft 4 to follow the left and right sides of the carriage 1. Switch to the retracted position. At this time, the outriggers 5a to 5d are automatically locked and held in the retracted posture by the locking tools 50a to 50d.

そして最後に台車１を、台車手押し操作用バー１３を利用して伸縮自在梯子１２のある側から手押し操作して所定の場所へ移動させるのであるが、そのときの作業者から見て前方に位置する伸縮フレーム６が上記実施形態で示したような枠組み構造体であれば、それほど視界を邪魔されることは無く、比較的安全に手押し操作することができるし、伸縮駆動手段９や、台車側固定フレーム部分７と昇降フレーム部分８との間の昇降ガイドローラー１９，２０などに対する保守点検が容易に行えるが、反面、伸縮フレーム６が枠組み構造体であるときは、台車側固定フレーム部分７と昇降フレーム部分８との間に手や衣服を挟んだり、両者間の滑りに伴って発生する粉塵の飛散が容易になるなどの問題点が生じる。従って、このような問題点を解消する方を優先させるのであれば、図５に仮想線で示すように、台車側固定フレーム部分７の周囲をカバー材６０ａ〜６０ｄで覆うことができるが、この場合、少なくとも台車側固定フレーム部分７の前後両側面（伸縮自在梯子１２のある側と反対側の両方の側面）のカバー材６０ｂ，６０ｄは、台車１を前方へ手押し移動するときの視界を邪魔しないように透明材料（好ましくは透明合成樹脂材）で構成されたものを使用するのが望ましい。勿論、昇降フレーム部分８の側面にも、昇降ガイドローラー１９やチエン巻き上げ繰り出し手段２５の回転操作軸２５ａなどと干渉しない範囲でカバー材を張設することができるし、台車側固定フレーム部分７の上端から上方に突出する昇降フレーム部分８の各側面をカバーする目的で、台車側固定フレーム部分７の上端各側辺と昇降フレーム部分８の上端各側辺との間に、自動巻取り式のスクリーンを張設することもできる。これら昇降フレーム部分８の各側面に対して作用するカバー材も、必要に応じて前記カバー材６０ａ〜６０ｄと同様に、一部または全部を透明材料から構成することができる。 Finally, the carriage 1 is moved to a predetermined place by manually pushing from the side where the extendable ladder 12 is located by using the carriage pushing operation bar 13, but is positioned forward as viewed from the operator at that time. If the telescopic frame 6 is a frame structure as shown in the above embodiment, the field of view is not disturbed so much and it can be operated by hand relatively safely. The telescopic drive means 9 and the cart side Maintenance and inspection for the elevating guide rollers 19 and 20 between the fixed frame portion 7 and the elevating frame portion 8 can be easily performed. On the other hand, when the telescopic frame 6 is a frame structure, the carriage side fixed frame portion 7 and There are problems that hands and clothes are sandwiched between the lift frame portion 8 and that dust generated due to slippage between both is easily scattered. Accordingly, if priority is given to solving such problems, the periphery of the carriage-side fixed frame portion 7 can be covered with the cover materials 60a to 60d as shown in phantom lines in FIG. In this case, at least the cover members 60b and 60d on both the front and rear side surfaces (both sides opposite to the side where the telescopic ladder 12 is provided) of the cart side fixed frame portion 7 obstruct the field of view when the cart 1 is pushed forward. It is desirable to use a material composed of a transparent material (preferably a transparent synthetic resin material). Of course, a cover material can be stretched on the side surface of the elevating frame portion 8 as long as it does not interfere with the elevating guide roller 19 and the rotation operating shaft 25a of the chain hoisting and feeding means 25, etc. For the purpose of covering each side of the elevating frame portion 8 protruding upward from the upper end, an automatic winding type is provided between the upper end sides of the carriage side fixed frame portion 7 and the upper end sides of the elevating frame portion 8. A screen can be stretched. The cover material that acts on each side surface of the elevating frame portion 8 can be partly or entirely made of a transparent material, if necessary, like the cover materials 60a to 60d.

図２に示すように、伸縮フレーム６を縮小させた状態の台車式作業足場を移動させるとき、図１及び図２に示すように、伸縮フレーム６の台車側固定フレーム部分７の上端またはその近傍位置で、伸縮自在梯子１２のある側とは反対側の左右両側（左右幅方向の中央１箇所でも良い）に移動用車輪６１が配設してあると、トラックなどの荷台上に対してこの台車式作業足場を積み下ろしする場合や、上下空間高さの低い場所でこの台車式作業足場を移動させるとき、この台車式作業足場を９０度前方に転倒させた姿勢にしても、台車１の四隅下側の移動用車輪３の内、伸縮自在梯子１２のある側とは反対側（前端側）の左右一対の移動用車輪３と前記移動用車輪６１とを着床させて当該台車式作業足場を移動可能に支持させることができる。 As shown in FIG. 2, when moving the cart-type work scaffold with the telescopic frame 6 contracted, as shown in FIGS. 1 and 2, the upper end of the cart side fixed frame portion 7 of the telescopic frame 6 or its vicinity is shown. If the moving wheels 61 are arranged on both the left and right sides (or one center in the left-right width direction) opposite to the side where the telescopic ladder 12 is located, When loading or unloading a truck-type work platform, or when moving this truck-type work platform in a place where the height of the vertical space is low, the four corners of the carriage 1 can be placed even if the carriage-type work platform is tilted 90 degrees forward. Of the lower moving wheel 3, the pair of left and right moving wheels 3 on the opposite side (front end side) to the side where the telescopic ladder 12 is located and the moving wheel 61 are landed to make the cart-type work platform. Can be movably supported.

作業足場台を上昇限位置まで上げて使用するときの状態を示す側面図である。It is a side view which shows a state when raising and using a work scaffold stand to a raise end position. 作業足場台を下降限位置まで下げて台車を移動させるときの状態を示す側面図である。It is a side view which shows a state when lowering | hanging a work scaffold to a descent | fall limit position and moving a trolley | bogie. 図１の状態での平面図である。It is a top view in the state of FIG. 図２の状態での平面図である。It is a top view in the state of FIG. 伸縮フレームの詳細構造を示す横断平面図である。It is a cross-sectional top view which shows the detailed structure of an expansion-contraction frame. 図５の要部の拡大図である。It is an enlarged view of the principal part of FIG. 上半分は図５のＸ−Ｘ線断面図であり、下半部は図５のＹ−Ｙ線断面図である。The upper half is a cross-sectional view taken along the line XX in FIG. 5, and the lower half is a cross-sectional view taken along the line YY in FIG. Ａ図は伸縮自在梯子の要部を示す側面図であり、Ｂ図は上側の保持部材を示す横断平面図と下側の保持部材を示す横断平面図である。Fig. A is a side view showing the main part of the extendable ladder, and Fig. B is a transverse plan view showing the upper holding member and a transverse plan view showing the lower holding member. Ａ図は伸縮駆動手段を示す要部の側面図であり、Ｂ図は同縦断正面図である。Fig. A is a side view of the main part showing the telescopic drive means, and Fig. B is a longitudinal front view of the same. Ａ図は落下防止手段を示す要部の一部切欠き側面図であり、Ｂ図は同要部の拡大横断平面図である。Fig. A is a partially cutaway side view of the main part showing the fall prevention means, and Fig. B is an enlarged transverse plan view of the main part.

符号の説明Explanation of symbols

１台車
３，６１移動用車輪
４垂直支軸
５ａ〜５ｄアウトリガー
６伸縮フレーム
７台車側固定フレーム部分
８昇降フレーム部分
９伸縮駆動手段
１０作業足場台
１１安全手摺り枠
１２伸縮自在梯子
１３台車手押し操作用バー
１４ａ〜１５ｄ垂直向きの角柱状部材
１６，１６ａ，１７水平向きの角柱状部材
１８部材取付用溝
１９，２０昇降ガイドローラー
１９ａ，２０ａローラーの大径鍔部
２１，２２ローラーの軸受け部材
２５チエン巻き上げ繰り出し手段
２７チエン
２９チエン巻き上げ繰り出し手段の操作ハンドル
３１，３４，４３水平支軸
３２下側梯子部分
３５上側梯子部分
３６保持手段
３７，３８Ｌ形保持部材
３９合成樹脂製滑り材
４４安全手摺り枠のロック手段
４５グリップ付きボルト
４６，４７ネジ孔
４８アウトリガーのネジジャッキ
４９アウトリガーの接地盤
５０ａ〜５０ｄアウトリガーの係止具
５３落下防止手段
５４貫通係止孔
５６ピン孔
５７係止ピン
６０ａ〜６０ｄカバー材 DESCRIPTION OF SYMBOLS 1 Carriage 3,61 Wheel 4 Vertical support shaft 5a-5d Outrigger 6 Telescopic frame 7 Carriage side fixed frame part 8 Lifting frame part 9 Telescopic drive means 10 Work scaffolding base 11 Safety handrail frame 12 Telescopic ladder 13 Carriage manual push operation Bars 14a to 15d Vertically oriented prismatic members 16, 16a, 17 Horizontally oriented prismatic members 18 Member mounting grooves 19, 20 Lifting guide rollers 19a, 20a Roller large diameter flanges 21, 22 Roller bearing members 25 Chain winding and unwinding means 27 Chain 29 Operation handle 31, 34, 43 of the chain winding and unwinding means Horizontal support shaft 32 Lower ladder portion 35 Upper ladder portion 36 Holding means 37, 38 L-shaped holding member 39 Synthetic resin sliding material 44 Safety hand Locking means 45 for the sliding frame Bolts 46, 47 with grips Screw holes 48 Gur screw jack 49 Outrigger grounding panels 50a to 50d Outrigger lock 53 Drop prevention means 54 Through lock hole 56 Pin hole 57 Lock pin 60a to 60d Cover material

Claims

台車上に昇降自在に支持された作業足場台と、この作業足場台と台車との間に架設された伸縮自在梯子とを備え、前記作業足場台は、台車に対して垂直に立設され且つ伸縮駆動手段により伸縮駆動される伸縮フレームの昇降上端部に支持され、前記伸縮自在梯子は、下端側が前記伸縮フレームから離れるように梯子全体が斜めに傾斜する姿勢において、上端が作業足場台側に下端が前記台車側に、それぞれ水平支軸の周りに揺動自在に軸支されて、作業足場台の昇降に伴って傾斜角度を変えながら伸縮するように構成されている台車式作業足場において、前記伸縮フレームの台車側固定フレーム部分と台車との間には、前記伸縮自在梯子を左右両側から挟むように配置された左右一対の台車手押し操作用バーが架設されている、台車式作業足場。 A work scaffolding platform which is vertically movably supported on a carriage, and a telescopic ladder which is bridged between the work scaffolding platform and the truck, before Symbol work scaffolding platform is erected perpendicular to the carriage The telescopic ladder supported by the upper and lower ends of the telescopic frame that is telescopically driven by the telescopic driving means is configured such that the upper end is on the side of the work platform when the entire ladder is inclined obliquely so that the lower end is separated from the telescopic frame. to the lower end the carriage side, is swingably supported about respective horizontal support shaft, the carriage type work scaffolding that is configured to stretch while changing the inclination angle with the work scaffolding platform of the lifting the between the bogie side fixed frame part and the carriages of the telescopic frame, the telescopic ladder the placed pair of left and right carriage hand operating bar so as to sandwich the left and right sides are bridged, trolley-type working legs .

前記伸縮フレームの台車側固定フレーム部分には、その外側を覆うカバー材が張設され、当該カバー材の内、少なくとも前記伸縮自在梯子と伸縮フレームとを結ぶ台車前後方向に位置するカバー材は、透明材料から構成されている、請求項１に記載の台車式作業足場。 A cover material covering the outside is stretched on the cart side fixed frame portion of the telescopic frame, and at least the cover material located in the front-rear direction of the cart connecting the telescopic ladder and the telescopic frame is the cover material, The trolley type work scaffolding according to claim 1, which is made of a transparent material .

台車上に昇降自在に支持された作業足場台と、この作業足場台と台車との間に架設された伸縮自在梯子とを備え、前記作業足場台は、台車に対して垂直に立設され且つ伸縮駆動手段により伸縮駆動される伸縮フレームの昇降上端部に支持され、前記伸縮自在梯子は、下端側が前記伸縮フレームから離れるように梯子全体が斜めに傾斜する姿勢において、上端が作業足場台側に下端が前記台車側に、それぞれ水平支軸の周りに揺動自在に軸支されて、作業足場台の昇降に伴って傾斜角度を変えながら伸縮するように構成されている台車式作業足場において、前記台車は、その長手方向一端部上に前記伸縮フレームが立設されると共に他端部上に前記伸縮自在梯子の下端が軸支された平面長方形状のもので、少なくとも伸縮フレームが立設された一端部側の左右両側には、出退自在なアウトリガーが設けられ、このアウトリガーは、台車の四隅に各々垂直軸心の周りに回転自在に設けられ、各アウトリガーを台車の側辺に沿った退入姿勢において係止する係止具が併設されている、台車式作業足場。 A working scaffold supported on the carriage so as to be movable up and down, and a telescopic ladder constructed between the working scaffold and the carriage, the working scaffold standing upright with respect to the carriage and Supported by the upper and lower ends of the telescopic frame that is telescopically driven by the telescopic driving means, the telescopic ladder has an upper end on the work platform side in a posture in which the entire ladder is inclined obliquely so that the lower end side is separated from the telescopic frame. In the truck-type work scaffolding, which is configured such that the lower end thereof is pivotally supported around the horizontal support shaft on each side of the carriage and is expanded and contracted while changing the inclination angle as the work platform is raised and lowered. The cart has a rectangular shape in which the telescopic frame is erected on one end in the longitudinal direction and the lower end of the telescopic ladder is pivotally supported on the other end, and at least the telescopic frame is erected. The The left and right sides of the end portion, projecting and retracting freely outriggers are provided, this outrigger is rotatably provided around each vertical axis in the four corners of the cart, retreat each outrigger along the sides of the bogie A truck-type work scaffolding with a locking tool that locks in the entrance position.

台車上に昇降自在に支持された作業足場台と、この作業足場台と台車との間に架設された伸縮自在梯子とを備え、前記作業足場台は、台車に対して垂直に立設され且つ伸縮駆動手段により伸縮駆動される伸縮フレームの昇降上端部に支持され、前記伸縮自在梯子は、下端側が前記伸縮フレームから離れるように梯子全体が斜めに傾斜する姿勢において、上端が作業足場台側に下端が前記台車側に、それぞれ水平支軸の周りに揺動自在に軸支されて、作業足場台の昇降に伴って傾斜角度を変えながら伸縮するように構成されている台車式作業足場において、前記台車は、その長手方向一端部上に前記伸縮フレームが立設されると共に他端部上に前記伸縮自在梯子の下端が軸支された平面長方形状のもので、その四隅下側と、前記伸縮フレームの台車側固定フレーム部分の上端で伸縮自在梯子のある側とは反対側に、移動用車輪が配設されている、台車式作業足場。 A working scaffold supported on the carriage so as to be movable up and down, and a telescopic ladder constructed between the working scaffold and the carriage, the working scaffold standing upright with respect to the carriage and Supported by the upper and lower ends of the telescopic frame that is telescopically driven by the telescopic driving means, the telescopic ladder has an upper end on the work platform side in a posture in which the entire ladder is inclined obliquely so that the lower end side is separated from the telescopic frame. In the truck-type work scaffolding, which is configured such that the lower end thereof is pivotally supported around the horizontal support shaft on each side of the carriage and is expanded and contracted while changing the inclination angle as the work platform is raised and lowered. The cart has a rectangular shape in which the telescopic frame is erected on one end in the longitudinal direction and the lower end of the telescopic ladder is pivotally supported on the other end. Telescopic frame The upper end with retractable with ladder side of the car-side fixed frame portion on the opposite side, transport wheel is arranged, trolley-type working scaffold.

前記作業足場台には安全手摺り枠が併設され、当該安全手摺り枠は、この安全手摺り枠を含む全高を低くする倒伏姿勢に切り換え可能に構成されている、請求項１〜４の何れか１項に記載の台車式作業足場。 A safety handrail frame is attached to the work platform, and the safety handrail frame is configured to be switchable to a lying posture that reduces the overall height including the safety handrail frame. truck type working scaffold described in item 1 or.

倒伏姿勢に切り換えられた前記安全手摺り枠を前記伸縮フレームの台車側固定フレーム部分に係止する係止手段を備えている、請求項５に記載の台車式作業足場。 The cart-type work scaffold according to claim 5 , further comprising locking means for locking the safety handrail frame switched to a lying posture to a cart-side fixed frame portion of the telescopic frame .

前記伸縮フレームは、台車側固定フレーム部分とその内側を昇降し且つ上端で作業足場台を支持する昇降フレーム部分とから成り、前記伸縮駆動手段は、前記昇降フレーム部分の内側に配置され且つ前記台車側固定フレーム部分の上端側に支持されたチエン巻き上げ繰り出し手段から成り、当該チエン巻き上げ繰り出し手段で巻き上げ繰り出し操作されるチエンの一端が前記昇降フレーム部分の下端に係止され、当該チエン巻き上げ繰り出し手段から垂下するチエンの遊端が前記台車側固定フレーム部分に係止され、当該チエン巻き上げ繰り出し手段を前記台車側固定フレーム部分の横外側に配置された操作ハンドルで駆動操作し得るように構成されている、請求項１〜６の何れか１項に記載の台車式作業足場。 The telescopic frame includes a carriage-side fixed frame part and an elevating frame part that moves up and down inside and supports the work platform at the upper end, and the telescopic drive means is disposed inside the elevator frame part and the carriage A chain winding and feeding means supported on the upper end side of the side fixed frame portion. One end of the chain that is wound and fed by the chain winding and feeding means is locked to the lower end of the lifting and lowering frame portion, and the chain winding and feeding means The free end of the hanging chain is locked to the cart-side fixed frame portion, and the chain winding and feeding means can be driven and operated by an operation handle arranged on the lateral outer side of the cart-side fixed frame portion. The cart type work scaffold according to any one of claims 1 to 6 .

前記伸縮フレームの台車側固定フレーム部分と昇降フレーム部分とは、それぞれ四隅に配置されたアルミニウム成形材から成る角柱状部材を備え、各角柱状部材には、当該角柱状部材の長さ方向に連続する横断面奥広がり形の部材取付用溝が設けられ、台車側固定フレーム部分と昇降フレーム部分との間に介在される昇降ガイド用ローラーは、対接する側の角柱状部材の前記部材取付用溝に嵌合する大径鍔部を有するもので、このローラーを支持する側の角柱状部材に前記部材取付用溝を介して取り付けられた軸受け部材に軸支されている、請求項１〜７の何れか１項に記載の台車式作業足場。 The cart-side fixed frame portion and the lifting frame portion of the telescopic frame include prismatic members made of aluminum moldings arranged at the four corners, and each prismatic member is continuous in the length direction of the prismatic member. A member mounting groove having a transverse cross-sectionally widened shape is provided, and the lifting guide roller interposed between the carriage-side fixed frame portion and the lifting frame portion is provided in the member mounting groove of the prismatic member on the contact side. The large-diameter flange portion fitted to the roller is supported by a bearing member attached to the prismatic member on the side supporting the roller via the member attachment groove. The cart type work scaffold of any one statement.

前記伸縮自在梯子は、下端を台車側に軸支された下側梯子部分と、上端を作業足場台側に軸支され且つ下端側が前記下側梯子部分に重なる上側梯子部分と、上下両梯子部分の重なり部分を互いに重なり状態で長さ方向に相対移動のみ可能に保持させる保持手段とから構成され、前記保持手段は、上下各梯子部分の端部の左右両側に取り付けられて相手側梯子部分の左右両側辺を保持する保持部材と、各保持部材の内側に付設された合成樹脂製滑り材とから成る、請求項１〜８の何れか１項に記載の台車式作業足場。 The telescopic ladder includes a lower ladder portion whose lower end is pivotally supported on the cart side, an upper ladder portion whose upper end is pivotally supported on the work platform and the lower end overlaps the lower ladder portion, and both upper and lower ladder portions. Holding means for holding the overlapping portions of each other in an overlapping state so as to allow only relative movement in the length direction.The holding means are attached to both the left and right sides of the end portions of the upper and lower ladder portions, and The cart type work scaffolding according to any one of claims 1 to 8, comprising a holding member that holds both left and right sides, and a synthetic resin sliding material provided inside each holding member .