JP2019182326A - Footboard - Google Patents

Abstract

To provide a footboard having a structure which prevents interference with a front spoiler of a vehicle when loading and unloading a vehicle on a load-carrying platform.SOLUTION: A footboard W is rotatably supported at a rear end part of a load-carrying platform 110 of a vehicle dolly 110. One end of the footboard is a free end, the other end side is rotatably supported at the rear end part of the load-carrying platform 110, and one face is a transport face Wa. When the free end is grounded on a ground surface G in a lodging state, the transport face Wa is oriented upward, and a transport path, which is constructed between the load-carrying platform 100 and the ground surface G, to which the transport face Wa is continuously connected from the ground surface G, and which extends to the load-carrying platform 110, is formed. Plural step parts 22, 23, 24 are formed on the transport face Wa, and a height dimension from the ground surface G is gradually increased from the ground surface G toward the load-carrying platform 110 by the plural steps 22, 23, 24 when forming the transport path.SELECTED DRAWING: Figure 9

Description

本発明は、歩み板に関し、例えば、車両運搬車の荷台の後端部に設けられる歩み板に関する。   The present invention relates to a step board, for example, a step board provided at a rear end portion of a loading platform of a vehicle transport vehicle.

特許文献１には、歩み板を備えた車両運搬車の構成が開示されている。この車両運搬車は、車枠（車体フレーム）上に枢軸を以て傾動自在に設けられた支持枠（チルトフレーム）と、支持枠に前後方向にスライド自在に支持された荷台（荷箱）と、当該荷台の後部に取付けられる歩み板とを備えている。また、上記の歩み板は、その一方面に、表面が平坦な搬送面（乗り込み面）が形成されている。   Patent Document 1 discloses a configuration of a vehicle transporter including a step board. The vehicle transport vehicle includes a support frame (tilt frame) provided on a vehicle frame (body frame) so as to be tiltable about a pivot, a cargo bed (loading box) supported by the support frame so as to be slidable in the front-rear direction, It has a step board attached to the rear part. In addition, the above-mentioned step board has a conveyance surface (boarding surface) with a flat surface formed on one surface thereof.

上記の車両運搬車に、車両を積み込む場合には、先ず、作業者が車両運搬車の操作部を操作し、水平姿勢の支持枠を後方側に傾斜した傾斜姿勢にし、支持枠にスライド自在に支持されている荷台を、支持枠と共に傾斜させ且つ支持枠に沿って後方に移動させる。次に、作業者は、荷台の後端部に立設している歩み板を回動させて歩み板の先端（自由端）を地上面に接地させる。これにより、歩み板は、荷台と地上とに架設されて、地上から連続的に繋がった登坂路（搬送路）を形成する。そして、作業者は、地上の運搬車両（車両）を運転し、上記の搬送路を通行させて、荷台に車両を搭載させることができるようになっている。
なお、表面が平坦な搬送面になっている歩み板の構成は、例えば、特許文献２にも開示されている。 When loading a vehicle onto the vehicle transport vehicle, first, an operator operates the operation unit of the vehicle transport vehicle to change the horizontal support frame to a tilted position inclined backward, and is slidable on the support frame. The supported loading platform is tilted together with the support frame and moved rearward along the support frame. Next, the worker rotates the step board standing at the rear end of the loading platform to ground the front end (free end) of the step board to the ground surface. Thereby, a step board is constructed by the loading platform and the ground, and forms the uphill road (conveyance path) continuously connected from the ground. Then, the operator can drive the ground transportation vehicle (vehicle) and allow the vehicle to be mounted on the loading platform by passing the transportation path.
In addition, the structure of the step board in which the surface is a flat conveyance surface is also disclosed in Patent Document 2, for example.

実公平７−２３０４号公報No. 7-2304 特許６２３２２６４号公報Japanese Patent No. 6232264

ところで、上述した従来技術は、いずれも、歩み板の搬送面（乗り込み面）が平坦に形成されている。そして、荷台と地上との間に歩み板を架設した状態にすると、歩み板の搬送面は、地上面から荷台まで直線状に延びる傾斜面を形成し、その傾斜面の上を車両が通行するようになっている。
しかし、上述した従来技術は、地上面にある車両を荷台に積み込むために、略水平の地上面から、荷台に向けて直線状に延びる傾斜面を形成している歩み板（搬送面）の上に移動させている最中に、車両のフロントスポイラーが歩み板に干渉することがあった。これは、車両が、略水平の地上面から直線状に上昇する傾斜面になっている歩み板に移動するときに、直線状に延びる傾斜面の距離が長いと、車両のフロントスポイラーが歩み板に干渉する可能性が高まるためである。その結果、上述した従来技術の歩み板では、荷台に車両を積み降ろしする際に、歩み板に車両のフロントスポイラーがぶつかり、フロントスポイラーを損傷或いは破損させる虞があった。 By the way, in each of the conventional techniques described above, the transport surface (boarding surface) of the step board is formed flat. Then, when the step board is installed between the loading platform and the ground, the conveyance surface of the walking plate forms an inclined surface extending linearly from the ground surface to the loading platform, and the vehicle passes over the inclined surface. It is like that.
However, the above-described conventional technique is designed to load a vehicle on the ground surface onto a loading platform, on a step board (conveying surface) that forms an inclined surface extending linearly from the substantially horizontal ground surface toward the loading platform. During the movement, the front spoiler of the vehicle sometimes interferes with the walking board. This is because when the vehicle moves from a substantially horizontal ground surface to a step board that has an inclined surface that rises linearly, if the distance of the inclined surface that extends linearly is long, the front spoiler of the vehicle becomes a step board. This is because the possibility of interference increases. As a result, in the above-described prior art step board, when the vehicle is loaded onto or unloaded from the loading platform, the front spoiler of the vehicle collides with the step board, and the front spoiler may be damaged or broken.

本発明は、上記技術的課題に鑑みてなされたものであり、その目的は、車両運搬車の荷台の後端部に設けられる歩み板であって、荷台に車両を積み降ろしする際に、車両のフロントスポイラーとの干渉を防止した歩み板を提供することにある。   The present invention has been made in view of the above technical problem, and an object of the present invention is a step board provided at a rear end portion of a loading platform of a vehicle transporter. When loading and unloading a vehicle on a loading platform, the vehicle is An object of the present invention is to provide a walk board that prevents interference with the front spoiler.

上記技術的課題を解決するためになされた本発明は、車両運搬車の荷台の後端部において、該荷台の荷物搭載面から略垂直に立設した起立状態と、該荷物搭載面と略面一をなして該荷台より後方に延びる倒伏状態とになるように、該荷台の後端部に回動自在に支持されている歩み板であって、一端部が自由端になっており、他端部側が前記荷台の後端部に回動自在に支持されている共に、その一方面が搬送面になっており、前記倒伏状態にしてその自由端を地上面に接地させると、前記搬送面が上方に向くと共に、前記荷台と前記地上面との間に架設され、前記搬送面が該地上面から連続的に繋がり該荷台まで延びる搬送路を形成し、前記搬送面には、複数の段差部が形成されており、前記搬送面は、前記搬送路を形成したときに、前記複数の段差部により、前記地上面から前記荷台に向けて、段階的に地上面からの高さ寸法が大きくなるようになっていることを特徴とする。   The present invention, which has been made to solve the above technical problem, is a standing state of standing substantially vertically from the load mounting surface of the load carrier at the rear end of the load carrier of the vehicle transport vehicle, and the load mounting surface and the substantially surface. A step board that is pivotally supported at the rear end of the cargo bed so as to be in a lying state extending rearward from the cargo bed at one end, with one end being a free end, The end side is rotatably supported by the rear end portion of the loading platform, and one surface thereof is a transport surface. When the free end is grounded to the ground surface in the above-described lying state, the transport surface Is directed between the loading platform and the ground surface, the transportation surface is continuously connected from the ground surface to form a transportation path extending to the loading platform, and the transportation surface has a plurality of steps. A portion is formed, and the transport surface is formed when the transport path is formed. By the step portion, toward the loading platform from the ground surface, characterized in that it stepwise so as height from the ground surface is increased.

このように本発明では、地上面から該荷台まで延びる搬送路（歩み板により形成された搬送路）は、上述した従来技術のような「地上面から荷台まで直線状に延びる傾面」ではなく、段階的に地上面からの高さ寸法が大きくなる段差部が形成された構成になっている。
この構成によれば、車両は、歩み板の各段差部を登ることで、地上面から段階的に上昇するようになる。また、このとき、車両のフロントスポイラーは、車両と共に、段差部の高さ寸法分（厚さ方向の寸法分）だけ、歩み板から離間する方向に押し上げられるため、「直線状に上昇する傾斜面（段差が無い傾斜面）を形成する歩み板」を通る場合と比べて、車両のフロントスポイラーが、歩み板Ｗの搬送面に干渉する可能性が軽減される。 As described above, in the present invention, the conveyance path extending from the ground surface to the loading platform (conveyance path formed by the step board) is not the “inclined surface extending linearly from the ground surface to the loading platform” as described above. The step portion is formed such that the height from the ground surface increases step by step.
According to this configuration, the vehicle climbs stepwise from the ground surface by climbing each stepped portion of the step board. At this time, since the front spoiler of the vehicle is pushed up with the vehicle by a height dimension of the stepped portion (a dimension in the thickness direction) in a direction away from the step board, “an inclined surface that rises linearly ( The possibility that the front spoiler of the vehicle interferes with the conveyance surface of the step board W is reduced as compared with the case of passing through a “step board that forms an inclined surface having no level difference”.

また、複数の前記段差部には、いずれも、前記搬送路を形成したときに、その一端部側に、一端部側から他端部側に向けて地上面からの高さ寸法が徐々に大きくなる斜面部が形成されていることが望ましい。
本発明では、車両のフロントスポイラーとの干渉を防ぐために、歩み板の搬送面に段差部を設けた構成を採用しているが、その一端部側に斜面部を形成することにより、車両がスムーズに段差部の上に登ることができる。すなわち、本発明の歩み板は、段差部を有する構成でありながら、車両をスムーズに通行させることができる。 In addition, when the transport path is formed in each of the plurality of stepped portions, the height dimension from the ground surface gradually increases from one end portion side to the other end portion side. It is desirable that a slope portion is formed.
In the present invention, in order to prevent interference with the front spoiler of the vehicle, a configuration is adopted in which a step portion is provided on the conveying surface of the step board. You can climb on the steps. That is, the step board of the present invention can smoothly pass the vehicle while having a stepped portion.

また、複数の前記段差部には、前記搬送路を形成したときに、前記斜面部に加えて、該斜面部の頂部から他端部に向けて水平面部が形成されるようになっており、且つ前記搬送路を形成したときに、前記水平面部は、一端部から他端部に向かう方向の長さ寸法が、前記斜面部のものより大きくなっていることが望ましい。
本発明の歩み板は、地上面から荷台までの搬送路となる搬送面に、複数の段差部が設けられ、その段差部に、斜面部と水平面部とを形成している。また、搬送路を形成したときに、水平面部は、一端部から他端部に向かう方向の長さ寸法が、斜面部のものより大きくなっている。この構成によれば、地上面から荷台まで延びる搬送路において、斜面部の長さを短くできるため、車両のフロントスポイラーが歩み板に干渉する可能性を軽減できる。 In addition, when the transport path is formed in the plurality of stepped portions, in addition to the slope portion, a horizontal plane portion is formed from the top portion of the slope portion toward the other end portion, And when the said conveyance path is formed, it is desirable for the said horizontal surface part to have the length dimension of the direction which goes to an other end part from one end part larger than the thing of the said slope part.
In the walking board of the present invention, a plurality of stepped portions are provided on a transport surface serving as a transport path from the ground surface to the loading platform, and a slope portion and a horizontal surface portion are formed in the stepped portion. Further, when the transport path is formed, the horizontal plane portion has a length dimension in the direction from the one end portion toward the other end portion that is larger than that of the slope portion. According to this configuration, since the length of the inclined surface portion can be shortened in the conveyance path extending from the ground surface to the loading platform, the possibility that the front spoiler of the vehicle interferes with the step board can be reduced.

本発明によれば、車両運搬車の荷台の後端部に設けられる歩み板であって、荷台に車両を積み降ろしする際に、車両のフロントスポイラーとの干渉を防止する歩み板を提供することができる。   According to the present invention, there is provided a step board provided at a rear end portion of a loading platform of a vehicle transport vehicle, which prevents interference with a front spoiler of the vehicle when the vehicle is loaded onto and unloaded from the loading platform. it can.

本発明の実施形態の歩み板が設けられた荷台を備えた車両運搬車を示した模式図であり、水平姿勢の荷台に運搬車両が積み込まれた状態を示している。It is the model which showed the vehicle carrier provided with the loading platform provided with the step board of embodiment of this invention, and has shown the state by which the conveyance vehicle was loaded on the loading platform of a horizontal attitude | position. 本発明の実施形態の歩み板が設けられた荷台を備えた車両運搬車を示した模式図であり、荷台を傾斜させて運搬車両を積み込みでいる最中の状態を示している。It is the model which showed the vehicle carrier provided with the loading platform provided with the step board of embodiment of this invention, and has shown the state in the middle of loading a conveyance vehicle by inclining a loading platform. 本発明の実施形態の歩み板が設けられた荷台と当該荷台を支持するチルトフレームとを示した模式図である。It is the schematic diagram which showed the loading platform in which the step board of embodiment of this invention was provided, and the tilt frame which supports the said loading platform. 本発明の実施形態の歩み板が設けられた荷台の平面を示した模式図である。It is the schematic diagram which showed the plane of the loading platform in which the step board of embodiment of this invention was provided. 本発明の実施形態の歩み板の搬送面を示した模式図である。It is the schematic diagram which showed the conveyance surface of the step board of embodiment of this invention. 本発明の実施形態の歩み板の接地面を示した模式図である。It is the schematic diagram which showed the ground-contact plane of the step board of embodiment of this invention. 本発明の実施形態の歩み板の側面を示した模式図である。It is the schematic diagram which showed the side surface of the step board of embodiment of this invention. 本発明の実施形態の歩み板と荷台との接続部分を説明するための模式図である。It is a schematic diagram for demonstrating the connection part of the step board and loading platform of embodiment of this invention. 図２に示すＡ部を拡大して示した模式図である。It is the schematic diagram which expanded and showed the A section shown in FIG.

以下、本発明の実施形態について、図面に基づいて説明する。
なお、本実施形態は、荷台の後部に取り付けられる歩み板の構成に特徴があり、それ以外の構成は従来のものと同じである。そのため、以下では、上記特徴を詳細に説明し、それ以外の構成については、省略或いは簡略化して説明する。また、歩み板は、テールゲート、或いは踏板とも呼ばれているが、本実施形態では、歩み板の名称で説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In addition, this embodiment has the characteristics in the structure of the step board attached to the rear part of a loading platform, and a structure other than that is the same as the conventional one. Therefore, in the following, the above features will be described in detail, and other configurations will be described with omission or simplification. The step board is also referred to as a tailgate or a tread board, but in the present embodiment, it will be described with the name of the step board.

先ず、本実施形態の概略について、図１〜図４を参照しながら説明する。
ここで、図１は、本実施形態の歩み板が設けられた荷台を備えた車両運搬車を示した模式図であり、水平姿勢の荷台に運搬車両が積み込まれた状態を示している。図２は、本実施形態の歩み板が設けられた荷台を備えた車両運搬車を示した模式図であり、荷台を傾斜させて運搬車両を積み込みでいる最中の状態を示している。図３は、本実施形態の歩み板が設けられた荷台と当該荷台を支持するチルトフレームとを示した模式図である。図４は、本実施形態の歩み板が設けられた荷台の平面を示した模式図である。 First, an outline of the present embodiment will be described with reference to FIGS.
Here, FIG. 1 is a schematic view showing a vehicle transporter provided with a loading platform provided with a step board according to the present embodiment, and shows a state in which the transporting vehicle is loaded on a horizontal loading platform. FIG. 2 is a schematic diagram showing a vehicle transport vehicle including a loading platform provided with a step board according to the present embodiment, and shows a state in which the transport vehicle is being loaded while the loading platform is inclined. FIG. 3 is a schematic diagram showing a loading platform provided with a step board according to the present embodiment and a tilt frame that supports the loading platform. FIG. 4 is a schematic diagram showing a plane of the loading platform provided with the step board of the present embodiment.

本実施形態の歩み板Ｗは、車両運搬車１００の荷台１１０の後端部において、荷台１１０の荷物搭載面（以下、「搭載面」という）１１０ａから略垂直・上方に延びる起立状態（図１参照）と、搭載面１１０ａと略面一をなして該荷台より後方（車両前後方向における後方）に延びる倒伏状態（図２参照）とになるように、荷台１１０の後端部に回動自在に支持されている。   The step board W of the present embodiment is in an upright state extending substantially vertically and upward from a load carrying surface (hereinafter referred to as “mounting surface”) 110a of the load carrier 110 at the rear end portion of the load carrier 110 of the vehicle transport vehicle 100 (FIG. 1). ) And a rear end portion of the loading platform 110 so as to be in a lying state (see FIG. 2) extending rearwardly (backward in the vehicle front-rear direction) substantially flush with the mounting surface 110a. It is supported by.

また、図１、２に示すように、車両運搬車１００は、車体フレーム１０１と、車両前後方向（図中に示すＸ方向）の後方に下傾するチルトフレーム１０３と、チルトフレーム１０３に対して車両前後方向にスライド自在に支持されている荷台１１０とを有し、荷台１１０の後端部側に、歩み板Ｗが設けられている。   As shown in FIGS. 1 and 2, the vehicle transport vehicle 100 has a vehicle body frame 101, a tilt frame 103 that tilts backward in the vehicle front-rear direction (X direction shown in the figure), and the tilt frame 103. The platform 110 is slidably supported in the vehicle front-rear direction, and a step board W is provided on the rear end side of the platform 110.

上記の歩み板Ｗは、その下端部が、車両運搬車１００の荷台１１０の後端部に設けられたヒンジ軸１３０を介して、荷台１１０に対して回動自在に取り付けられている。
また、歩み板Ｗは、一方面が運搬車両Ｃを通行させる搬送面（乗り込み面）Ｗａになっており、他方面が地上面Ｇに接地する接地面Ｗｂになっている。また、歩み板Ｗの搬送面Ｗａには、複数の段差部が形成されており、この段差部により、荷台１１０に運搬車両Ｃを積み込む際に、歩み板Ｗと、運搬車両Ｃのフロントスポイラーとの干渉を防止している。 The lower end of the step board W is rotatably attached to the platform 110 via a hinge shaft 130 provided at the rear end of the platform 110 of the vehicle transport vehicle 100.
Further, the one side of the walking board W is a conveyance surface (boarding surface) Wa through which the transport vehicle C passes, and the other surface is a grounding surface Wb that contacts the ground surface G. In addition, a plurality of step portions are formed on the conveyance surface Wa of the step board W, and when the transport vehicle C is loaded on the loading platform 110, the step plate W and the front spoiler of the transport vehicle C are formed by the step portions. Interference is prevented.

なお、車両運搬車１００は、走行しているとき等には、図１、３に示すように、チルトフレーム１０３が水平姿勢で車体フレーム１０１に支持され、この姿勢のチルトフレーム１０３に荷台１１０が引き上げられた状態で支持されている。この場合、歩み板Ｗは、荷台１１０の後端部において、荷台１１０の搭載面１１０ａ（図１、３、４参照）に対して略垂直に立てられた起立状態で利用される。このとき、歩み板Ｗは、搬送面Ｗａが荷台１１０側に向けて配置されると共に、接地面Ｗｂが後方・外側方向に向けて配置されるようになっている。   When the vehicle transporter 100 is traveling, as shown in FIGS. 1 and 3, the tilt frame 103 is supported by the vehicle body frame 101 in a horizontal posture, and the loading platform 110 is supported on the tilt frame 103 in this posture. Supported in a raised state. In this case, the step board W is used in an upright state, which is set up substantially perpendicular to the mounting surface 110a (see FIGS. 1, 3 and 4) of the loading platform 110 at the rear end portion of the loading platform 110. At this time, the step board W is arranged such that the conveyance surface Wa faces the loading platform 110 side, and the ground contact surface Wb faces the rear and outside directions.

また、荷台１１０に運搬車両Ｃを搬入（或いは荷台１００から運搬車両Ｃを搬出）するときには、先ず、停止した状態の車両運搬車１００の操作部（図示せず）を操作し、チルトフレーム１０３を水平姿勢から後方側に傾斜した傾斜姿勢にする。
そして、チルトフレーム１０３を水平姿勢から後方側に傾斜した傾斜姿勢にすると、チルトフレーム１０３にスライド自在に支持されている荷台１１０が、チルトフレーム１０３と共に傾斜し且つチルトフレーム１０３に沿って後方側にスライドし移動する。また、後方側に移動した荷台１１０は、その後端の下端部が地上面Ｇに接地するようになっている。 Further, when the transport vehicle C is carried into the loading platform 110 (or the transport vehicle C is transported from the loading platform 100), first, the operation unit (not shown) of the stopped vehicle transport vehicle 100 is operated, and the tilt frame 103 is moved. The inclined posture is inclined backward from the horizontal posture.
When the tilt frame 103 is tilted backward from the horizontal posture, the loading platform 110 that is slidably supported by the tilt frame 103 tilts together with the tilt frame 103 and moves rearward along the tilt frame 103. Slide and move. In addition, the loading platform 110 that has moved to the rear side is configured such that the lower end of the rear end thereof contacts the ground surface G.

次に、起立状態の歩み板Ｗをヒンジ軸１３０回りに後方へ向けて回動させ倒し倒伏状態にし、歩み板Ｗの接地面Ｗｂの自由端（先端）側の接地板２１を地上面Ｇに接地させると、搬送面Ｗａが上方に向くと共に、歩み板Ｗが荷台１１０と地上面Ｇとの間に架設され、搬送面Ｗａが地上面Ｇから連続的に繋がり該荷台まで延びる搬送路を形成する。   Next, the standing walking board W is rotated backward around the hinge shaft 130 to fall down, and the grounding board 21 on the free end (tip) side of the grounding surface Wb of the walking board W is placed on the ground surface G. When grounded, the conveyance surface Wa faces upward, and the step board W is installed between the loading platform 110 and the ground surface G, and the conveyance surface Wa is continuously connected from the ground surface G to form a conveyance path extending to the loading platform. To do.

そして、荷台１１０と地上面Ｇとの間に架設させた歩み板Ｗにより形成された搬送路の搬送面Ｗａに運搬車両Ｃを乗り上げ通行させることにより、荷台１１０に運搬車両Ｃを搬入（或いは荷台１００から運搬車両Ｃを搬出）できるようになっている（図２参照）。
なお、搬送面Ｗａのうち、後述する、一対の歩み板本体部２０・２０に運搬車両Ｃのタイヤが乗り上げられ、運搬車両Ｃの搬入や搬出が行われる。 Then, the transport vehicle C is carried on the transport surface Wa of the transport path formed by the step board W laid between the load platform 110 and the ground surface G, so that the transport vehicle C is carried into the transport platform 110 (or the load platform). The transport vehicle C can be unloaded from 100) (see FIG. 2).
In addition, on the conveyance surface Wa, the tire of the transport vehicle C rides on a pair of step board main body portions 20 and 20 described later, and the transport vehicle C is carried in and out.

次に、本実施形態の歩み板Wの構成について、上述した図1〜４と、図５〜７とを参照しながら説明する。
なお、図５は、本実施形態の歩み板の搬送面を示した模式図であり、図６は、本実施形態の歩み板の接地面を示した模式図であり、図７は、本実施形態の歩み板の側面を示した模式図である。 Next, the configuration of the walking board W of the present embodiment will be described with reference to FIGS. 1 to 4 and FIGS.
FIG. 5 is a schematic view showing the conveying surface of the step board of the present embodiment, FIG. 6 is a schematic view showing the grounding surface of the step board of the present embodiment, and FIG. It is the schematic diagram which showed the side surface of the walk board of a form.

図５、６に示すように、歩み板Ｗは、荷台１１０の車幅方向（図示するＹ方向）に延びる基端部１０と、基端部１０の左右・両側に所定間隔を開けて取り付けられた一対の歩み板本体部２０・２０と、１対の歩み板本体部２０・２０の間に配置され、１対の歩み板本体部２０・２０を連結する連結部３０とを有している。   As shown in FIGS. 5 and 6, the step board W is attached to the base end portion 10 extending in the vehicle width direction (Y direction shown in the figure) of the loading platform 110 and to the left and right and both sides of the base end portion 10 with a predetermined interval. A pair of step board main body parts 20 and 20 and a connecting part 30 that is arranged between the pair of step board main body parts 20 and 20 and connects the pair of step board main body parts 20 and 20. .

上記の連結部３０は、平面視で矩形の板状に形成されており、車幅方向の一端部が一方の歩み板２０の内側・側面に当接し固定され、車幅方向の他端部が他方の歩み板２０の内側・側面に当接し固定されている（連結部３０は、左右両側が１対の歩み板本体部２０・２０に挟持されている）。また、連結部３０は、その下端部が基端部１０に支持・固定されている。なお、連結部３０は、縦方向（図中のＺ方向）の長さ寸法が、歩み板本体部２０の縦方向の長さ寸法よりも小さくなっている（図示する例では、連結部３０は、縦方向の長さ寸法が、歩み板本体部２０の縦方向の長さ寸法の半分程度の寸法になっている）。   The connecting portion 30 is formed in a rectangular plate shape in plan view, and one end portion in the vehicle width direction is abutted against and fixed to the inner side / side surface of one step board 20, and the other end portion in the vehicle width direction is fixed. The inner side surface and the side surface of the other step board 20 are abutted and fixed (the connecting portion 30 is sandwiched between a pair of step board main body portions 20 and 20 on both the left and right sides). Further, the lower end portion of the connecting portion 30 is supported and fixed to the base end portion 10. Note that the length of the connecting portion 30 in the vertical direction (Z direction in the drawing) is smaller than the length of the step board main body 20 in the vertical direction (in the illustrated example, the connecting portion 30 is The length in the vertical direction is about half the length in the vertical direction of the step board main body 20).

また、基端部１０は、荷台１１０の車幅方向に延びる底壁１０ａと、底壁１０ａの長手方向の両端から略直角に延設された側壁１０ｂ・１０ｂと、底壁１０ａの短手方向の一端から略直角に延設された後壁１０ｃとを有する、断面視Ｌ字状に形成されている。
そして、基端部１０の底壁１０ａには、一対の歩み板本体部２０の下端部と、連結部３０の下端部とが載置されている。また、基端部１０の一方の側壁１０ｂには、一方の歩み板本体部２０の下端部の外側・側面が当接し、基端部１０の他方の側壁１０ｂには、他方の歩み板本体部２０の下端部の外側・側面が当接している。また、基端部１０の後壁１０ｃには、一対の歩み板本体部２０の接地面の下端部側の部分と、連結部３０の下端部側の部分とが当接している。 The base end portion 10 includes a bottom wall 10a extending in the vehicle width direction of the loading platform 110, side walls 10b and 10b extending substantially at right angles from both longitudinal ends of the bottom wall 10a, and a short direction of the bottom wall 10a. And a rear wall 10c extending substantially at a right angle from one end of each of the two.
Then, on the bottom wall 10 a of the base end portion 10, the lower end portions of the pair of walking board main body portions 20 and the lower end portion of the connecting portion 30 are placed. Further, one side wall 10b of the base end portion 10 is in contact with the outside / side surface of the lower end portion of the one step board main body portion 20, and the other side wall 10b of the base end portion 10 is contacted with the other step board main body portion. The outer side surface and the side surface of the lower end of 20 are in contact. Further, the lower wall side portion of the ground plane of the pair of walking board main body portions 20 and the lower edge portion side portion of the connecting portion 30 are in contact with the rear wall 10 c of the base end portion 10.

また、歩み板本体部２０は、平面視矩形に形成されており（図５、６参照）、一端部が自由端になっており、他端部が基端部１０に支持・固定されている。   Further, the step board main body portion 20 is formed in a rectangular shape in plan view (see FIGS. 5 and 6), one end portion is a free end, and the other end portion is supported and fixed to the base end portion 10. .

また、図７に示すように、歩み板本体部２０は、その一方面である搬送面Ｗａ側に、複数（３段）の段差部（第１段差部２２、第２段差部２３、第３段差部２４）が形成されており、自由端から他端部（基端部１０側）に向けて、厚さ方向（図示する「ｈ方向」）の寸法が段階的に大きくなっている。   In addition, as shown in FIG. 7, the step board main body 20 has a plurality of (three steps) step portions (first step portion 22, second step portion 23, third step) on the conveyance surface Wa side which is one side thereof. A stepped portion 24) is formed, and the dimension in the thickness direction ("h direction" shown in the figure) increases stepwise from the free end toward the other end (base end 10 side).

図示する例では、自由端を基準にして（自由端から見て）１段目の第１段差部２２は、厚さ寸法が「ｈ１（ｍｍ）」になっており、自由端から見て２段目の第２段差部２３は、厚さ寸法が「ｈ２（ｍｍ）」になっており、自由端から見て３段目の第３段差部２４は、厚さ寸法が「ｈ３（ｍｍ）」になっている。
なお、各段差部（第１段差部２２、第２段差部２３、第３段差部２４）の厚さ寸法は、「ｈ１」＜「ｈ２（ｈ２=２＊ｈ１）」＜「ｈ３（ｈ３=３＊ｈ１）」の関係になっている。 In the example shown in the drawing, the thickness of the first step portion 22 in the first step with respect to the free end (viewed from the free end) is “h1 (mm)”. The thickness of the second step portion 23 at the stage is “h2 (mm)”, and the third step portion 24 at the third stage as viewed from the free end has a thickness dimension of “h3 (mm)”. "It has become.
The thickness dimension of each step portion (the first step portion 22, the second step portion 23, and the third step portion 24) is “h1” <“h2 (h2 = 2 * h1)” <“h3 (h3 = 3 * h1) ”.

また、各段差部（第１段差部２２、第２段差部２３、第３段差部２４）は、いずれも、その一端部側の端部（先端部）に、一端部側から他端部側に向けて徐々に厚さ寸法が大きくなる斜面部（第１斜面部２２ａ、第２斜面部２３ａ、第３斜面部２４ａ）が形成されている。
また、各段差部（第１段差部２２、第２段差部２３、第３段差部２４）には、斜面部（第１斜面部２２ａ、第２斜面部２３ａ、第３斜面部２４ａ）に加えて、当該斜面部の頂部から他端部に向けて水平方向（図示するＺ方向）に延びる水平面部（第１水平面部２２ｂ、第２水平面部２３ｂ、第３水平面部２４ｂ）が形成されている。 In addition, each step portion (the first step portion 22, the second step portion 23, and the third step portion 24) is on one end side (tip portion) from the one end side to the other end side. Slope portions (the first slope portion 22a, the second slope portion 23a, and the third slope portion 24a) whose thickness dimension gradually increases toward are formed.
Further, in addition to the slope portions (the first slope portion 22a, the second slope portion 23a, and the third slope portion 24a), each step portion (the first step portion 22, the second step portion 23, and the third step portion 24) is added. Thus, horizontal plane portions (first horizontal plane portion 22b, second horizontal plane portion 23b, and third horizontal plane portion 24b) extending in the horizontal direction (Z direction shown in the drawing) from the top of the slope portion toward the other end are formed. .

具体的には、第１段差部２２は、歩み板本体部２０の一端部から他端部に向け且つ斜め上方に延びる第１斜面部２２ａと、第１斜面部２２ａの頂部から前記他端部に向けて水平方向に延びる第１水平面部２２ｂとにより構成されている。なお、第１斜面部２２ａの縦方向（図中のＺ方向）の長さ寸法は、第１水平面部２２ｂの縦方向の長さ寸法より小さくなっている（図示する例では、第１斜面部２２ａの縦方向の長さ寸法は、第１水平面部２２ｂの縦方向の長さ寸法の１／２程度になっている）。   Specifically, the first step portion 22 includes a first slope portion 22a extending from one end portion of the step board main body portion 20 toward the other end portion and obliquely upward, and the other end portion from the top portion of the first slope portion 22a. And a first horizontal surface portion 22b extending in the horizontal direction. In addition, the length dimension of the vertical direction (Z direction in a figure) of the 1st slope part 22a is smaller than the length dimension of the vertical direction of the 1st horizontal surface part 22b (in the example shown in figure, 1st slope part) The length dimension in the vertical direction of 22a is about ½ of the length dimension in the vertical direction of the first horizontal surface portion 22b).

また、第２段差部２３は、第１水平面部２２ｂの後端部から前記他端部に向け且つ斜め上方に延びる第２斜面部２３ａと、第２斜面部２３ａの頂部から前記他端部に向けて水平方向に延びる第２水平面部２３ｂとにより構成されている。なお、第２斜面部２３ａの縦方向（図中のＺ方向）の長さ寸法は、第２水平面部２３ｂの縦方向の長さ寸法より小さくなっている（図示する例では、第２斜面部２３ａの縦方向の長さ寸法は、第２水平面部２３ｂの縦方向の長さ寸法の１／６程度になっている）。   The second stepped portion 23 includes a second slope portion 23a extending from the rear end portion of the first horizontal surface portion 22b toward the other end portion and obliquely upward, and a top portion of the second slope portion 23a from the top portion to the other end portion. And a second horizontal surface portion 23b extending in the horizontal direction. In addition, the length dimension of the vertical direction (Z direction in a figure) of the 2nd slope part 23a is smaller than the length dimension of the vertical direction of the 2nd horizontal surface part 23b (in the example shown in figure, 2nd slope part) The longitudinal length of 23a is about 1/6 of the longitudinal length of the second horizontal surface portion 23b).

また、また、第３段差部２４は、第２水平面部２３ｂの後端部から前記他端部に向け且つ斜め上方に延びる第３斜面部２４ａと、第３斜面部２４ａの頂部から前記他端部に向けて水平方向に延びる第３水平面部２４ｂとにより構成されている。なお、第３斜面部２４ａの縦方向（図中のＺ方向）の長さ寸法は、第３水平面部２４ｂの縦方向の長さ寸法より小さくなっている（図示する例では、第３斜面部２４ａの縦方向の長さ寸法は、第３水平面部２４ｂの縦方向の長さ寸法の１／８程度になっている）。
なお、第１段差部２２の一端部側の裏面（接地面Ｗｂ）には、矩形の薄板状の接地板２１が取り付けられており、歩み板Ｗを倒伏状態にしたときに、この接地板２１が地上面Ｇに接地するようになっている。 The third step portion 24 includes a third slope portion 24a extending from the rear end portion of the second horizontal surface portion 23b toward the other end portion and obliquely upward, and the other end portion from the top portion of the third slope portion 24a. It is comprised by the 3rd horizontal surface part 24b extended in a horizontal direction toward a part. In addition, the length dimension of the vertical direction (Z direction in a figure) of the 3rd slope part 24a is smaller than the length dimension of the vertical direction of the 3rd horizontal surface part 24b (in the example shown in figure, 3rd slope part) The longitudinal length of 24a is about 1/8 of the longitudinal length of the third horizontal surface portion 24b).
Note that a rectangular thin plate-like ground plate 21 is attached to the back surface (ground surface Wb) on the one end portion side of the first step portion 22, and this ground plate 21 when the step board W is in a lying state. Is grounded to the ground surface G.

なお、本実施形態は、歩み板本体部２０がどのような製造方法で形成されてもよい。例えば、３枚の平面視・矩形状の板材（後述する第１板材２０ａ、第２板材２０ｂ、第３板材２０ｃ）と、１枚の平面視・矩形状の板材（接地板２１）と、補強部材（後述する補強部材２８ａ、２８ｂ、２８ｃ）とを組み立て溶接手段やボルト及びナット等の手段で固定して形成しても良いし、鋳造やプレス成形等により、図示する形状の歩み板本体部２０を形成するようにしても良い。   In the present embodiment, the step board main body 20 may be formed by any manufacturing method. For example, three planar / rectangular plates (first plate member 20a, second plate member 20b, and third plate member 20c described later), one planar / rectangular plate member (ground plate 21), and reinforcement A member (reinforcing members 28a, 28b, 28c, which will be described later) may be formed by being fixed by means of assembly welding means, bolts, nuts, or the like. 20 may be formed.

例えば、３枚の平面視・矩形状の板材と、平面視・矩形の薄板状の接地板２１と、補強部材とを組み立てることで歩み板本体部２０を形成する場合、横幅寸法が同じになっている、３枚の平面視・矩形状の板材（金属等で形成された板材（第１板材２０ａ、第２板材２０ｂ、第３板材２０ｃ））を準備する。
また、上記の板材（第１板材２０ａ、第２板材２０ｂ、第３板材２０ｃ）は、少なくとも、平面視・矩形状の上面部と、上面部の左右両側から略直角に屈曲した１対の側面部とを有している。また、１対の側面部の下端には、当該下端から内側に向けて略直角に屈曲して延設された脚片部が形成されている。 For example, when the step board main body 20 is formed by assembling three planar / rectangular plate members, a planar / rectangular thin plate-like ground plate 21 and a reinforcing member, the lateral dimensions are the same. 3 plate-like / rectangular plate materials (plate materials (first plate material 20a, second plate material 20b, third plate material 20c) formed of metal or the like) are prepared.
The plate members (first plate member 20a, second plate member 20b, and third plate member 20c) are at least a pair of side surfaces bent at substantially right angles from the left and right sides of the upper surface portion and the rectangular upper surface portion in plan view. Part. Further, leg pieces are formed at the lower ends of the pair of side surface portions so as to bend and extend substantially perpendicularly from the lower ends to the inside.

また、上記の板材の上面部は、一端部側にテーパ部が形成されており、組み立てられたときに、このテーパ部が斜面部（第１斜面部２２ａ、第２斜面部２３ａ、第３斜面部２４ａ）を形成する。
なお、第1板材２０ａは縦方向（図中のＺ方向）の長さ寸法が「ｚ１（ｍｍ）」、第２板材２０ｂは縦方向の長さ寸法が「ｚ２（ｚ２＞ｚ１）（ｍｍ）」、第３板材２０ｃは縦方向の長さ寸法が「ｚ３（ｚ３＜ｚ２）（ｍｍ）」になっている（図７参照）。 In addition, the upper surface portion of the plate material has a tapered portion formed on one end side, and when assembled, the tapered portion becomes a slope portion (first slope portion 22a, second slope portion 23a, third slope surface). Forming part 24a).
The first plate 20a has a longitudinal dimension (Z direction in the drawing) of “z1 (mm)”, and the second plate 20b has a longitudinal dimension of “z2 (z2> z1) (mm). The third plate member 20c has a longitudinal dimension of “z3 (z3 <z2) (mm)” (see FIG. 7).

そして、３枚の板材を部分的に重なり合うように配置して固定する（例えば、溶接手段により固定する）ことにより、搬送面Ｗａ側に、３段の段差部を形成している。
具体的には、第１板材２０ａと、第２板材２０ｂとを他端部（下端部）の位置を揃えると共に、左右両側の位置を揃えて、且つ第２板材２０ｂの上面部に、第１部材２０ａの脚片部を重ね合わせて固定する。また、第２板材２０ｂと第３板材２０ｃの左右両側の位置を揃えて、且つ第２板材２０ｂの脚片部のなかの第１板材２０ａと重なっている部分に、第３板材２０ｃの上面部を重ね合わせて固定する。 Then, by arranging and fixing the three plate materials so as to partially overlap (for example, fixing by welding means), three steps are formed on the conveyance surface Wa side.
Specifically, the first plate member 20a and the second plate member 20b are aligned with the positions of the other end portions (lower end portions), the left and right sides are aligned, and the first plate member 20b is aligned with the upper surface portion of the second plate member 20b. The leg pieces of the member 20a are overlapped and fixed. Further, the upper surface portion of the third plate member 20c is aligned with the left and right sides of the second plate member 20b and the third plate member 20c and overlaps the first plate member 20a in the leg piece portion of the second plate member 20b. Overlay and fix.

また、上記のように、３枚の板材（第１板材２０ａ、第２板材２０ｂ、第３板材２０ｃ）を重ね合わせて固定された中間体の裏面（接地面Ｗｂになる側）に、中空棒状の補強部材２８ａ、２８ｂ、２８ｃ（図６参照）を取り付ける。その後、第３板材２０ｃの一端側の脚片部に、矩形の薄板状の接地板２１を重ね合わせて取り付けて固定する。この作業により、搬送面Ｗａ側に、複数（３段）の段差部（第１段差部２２、第２段差部２３、第３段差部２４）が形成された、縦方向（図中のＺ方向）の長さ寸法が「ｚ４（ｍｍ）」の歩み板本体部２０が得られる。   Further, as described above, a hollow rod-like shape is formed on the back surface (the side that becomes the ground contact surface Wb) of the intermediate body that is fixed by superimposing the three plate materials (first plate material 20a, second plate material 20b, and third plate material 20c). The reinforcing members 28a, 28b and 28c (see FIG. 6) are attached. Thereafter, a rectangular thin plate-like ground plate 21 is attached and fixed to the leg piece on one end side of the third plate member 20c. By this operation, a plurality of (three steps) step portions (first step portion 22, second step portion 23, and third step portion 24) are formed on the conveyance surface Wa side in the vertical direction (Z direction in the figure). ) Has a length dimension “z4 (mm)”.

また、歩み板本体部２０の各寸法については、特に限定されるものではない。
例えば、歩み板Ｗは、第１斜面部２２ａのＺ方向の長さ寸法が、第１水平面部２２ｂのＺ方向の長さ寸法の半分程度の長さ寸法であり、第２、３斜面面部２３ａ、２４ａのＺ方向の長さ寸法が、厚さ寸法「ｈ１」の２倍程度（２＊ｈ１）の長さ寸法であっても良い。 Moreover, about each dimension of the step board main-body part 20, it does not specifically limit.
For example, in the walking board W, the length in the Z direction of the first slope portion 22a is about half the length in the Z direction of the first horizontal plane portion 22b, and the second and third slope surface portions 23a. 24a may be about twice as long as the thickness dimension “h1” (2 * h1).

次に、歩み板Ｗと、荷台１１０との接続構造について、上述した図１、２と、図８とを用いて説明する。
なお、図８は、本実施形態の歩み板と荷台との接続部分を説明するための模式図である。 Next, a connection structure between the step board W and the loading platform 110 will be described with reference to FIGS.
FIG. 8 is a schematic diagram for explaining a connecting portion between the step board and the loading platform of the present embodiment.

図示するように、本実施形態の歩み板Ｗは、基端部１０側の左右・両端部が、一対の荷台接続部材１２０・１２０に固定されている。また、荷台接続部材１２０・１２０は、荷台１１０の後端部側に設けられたヒンジ軸１３０に回動自在に取り付けられている。   As shown in the figure, the step board W of the present embodiment has the left and right and both ends on the base end 10 side fixed to a pair of load carrier connection members 120 and 120. Further, the loading platform connecting members 120 and 120 are rotatably attached to a hinge shaft 130 provided on the rear end side of the loading platform 110.

図示する例では、荷台接続部材１２０は、ヒンジ軸１３０に回動自在に取り付けられた回動部１２０ａと、回動部１２０ａに支持・固定されており、回動部１２０と共に回動するアーム部１２０ｂとを有している（図８参照）。また、アーム部１２０ｂに、歩み板Ｗの基端部１０が支持・固定されている。
この構成により、歩み板Ｗは、荷台接続部材１２０を介して、荷台１１０に回動自在に支持される。そして、歩み板Ｗは、荷台接続部材１２０を介して、荷台１１０に略垂直に起立させた起立状態で支持されるともに、起立状態からヒンジ軸１３０回りに後方へ向けて回動させて倒して倒伏状態にすることができる。 In the example shown in the figure, the loading platform connecting member 120 is pivotally attached to the hinge shaft 130 so as to be pivotable, and the arm portion is supported and fixed to the pivotable portion 120a and pivots together with the pivotable portion 120. 120b (see FIG. 8). Further, the base end portion 10 of the step board W is supported and fixed to the arm portion 120b.
With this configuration, the step board W is rotatably supported by the loading platform 110 via the loading platform connection member 120. The step board W is supported in an upright state in which the step board W is erected substantially perpendicularly to the gantry 110 via the pallet connection member 120, and is turned backward from the erected state around the hinge shaft 130. Can be in a lying state.

次に、荷台１１０に運搬車両Ｃを搬入（或いは荷台１００から運搬車両Ｃを搬出）させるために、歩み板Ｗを倒伏させ、荷台１１０と地上面Ｇとの間に架設させて形成した搬送路について、上述した図７と、図９とを参照しながら説明する。
なお、図９は、図２に示すＡ部を拡大して示した模式図である。 Next, in order to load the transport vehicle C into the loading platform 110 (or to transport the transport vehicle C from the loading platform 100), the transportation path formed by laying the step board W between the loading platform 110 and the ground surface G is formed. Will be described with reference to FIG. 7 and FIG. 9 described above.
FIG. 9 is an enlarged schematic view of the part A shown in FIG.

起立状態の歩み板Ｗをヒンジ軸１３０回りに後方へ向けて回動させ倒し倒伏状態にして、歩み板Ｗの接地面Ｗｂの自由端（先端）側の接地板２１を地上面Ｇに接地させると、歩み板Ｗは、荷台１１０と地上面Ｇとの間に架設されて、地上面Ｇから連続的に繋がり荷台１１０まで延びる搬送路を形成する（図９参照）。また、搬送路となっている歩み板Ｗの搬送面Ｗａには、３つの段差部（第１段差部２２、第２段差部２３、第３段差部２４）が形成され、搬送面Ｗａは、地上面Ｇから荷台１１０に向けて、段階的に地上面Ｇからの高さ寸法が上昇している。   The standing walking board W is rotated backward around the hinge shaft 130 to fall down, and the grounding board 21 on the free end (tip) side of the grounding surface Wb of the walking board W is grounded to the ground surface G. And the step board W is constructed between the loading platform 110 and the ground surface G, and forms the conveyance path extended from the ground surface G to the loading platform 110 continuously (refer FIG. 9). In addition, three step portions (first step portion 22, second step portion 23, and third step portion 24) are formed on the conveyance surface Wa of the step board W serving as a conveyance path. The height from the ground surface G is gradually increased from the ground surface G toward the loading platform 110.

また、上述した通り、上記の搬送路を形成する搬送面Ｗａには、複数の段差部２２、２３、２４が設けられている。そして、各段差部（第１段差部２２、第２段差部２３、第３段差部２４）には、いずれも、搬送路を形成したときに、その一端部側に、一端部側から他端部側に向けて地上面Ｇからの高さ寸法が徐々に大きくなる斜面部２２ａ、２３ａ、２４ａが形成されている。また、各段差部（第１段差部２２、第２段差部２３、第３段差部２４）には、いずれも、搬送路を形成したときに、斜面部２２ａ、２３ａ、２４ａに加えて、各斜面部２２ａ、２３ａ、２４ａの頂部から他端部に向けて延びる水平面部２２ｂ、２３ｂ、２４ｂが形成されている。
なお、上記の各水平面部２２ｂ、２３ｂ、２４ｂは、一端部から他端部に向かう方向（図中のＸ方向）の長さ寸法が、斜面部２２ａ、２３ａ、２４ａのものより大きくなっている。 Further, as described above, a plurality of step portions 22, 23, and 24 are provided on the transport surface Wa that forms the transport path. And each step part (the 1st step part 22, the 2nd step part 23, the 3rd step part 24) is the other end from the one end part side to the other end side when the conveyance path is formed. Slope portions 22 a, 23 a, and 24 a in which the height from the ground surface G gradually increases toward the portion side are formed. In addition, in each of the step portions (the first step portion 22, the second step portion 23, the third step portion 24), in addition to the inclined surface portions 22a, 23a, 24a, Horizontal surface portions 22b, 23b, and 24b extending from the tops of the slope portions 22a, 23a, and 24a toward the other end are formed.
In addition, each horizontal surface part 22b, 23b, 24b has a length dimension in a direction (X direction in the drawing) from one end part to the other end part, which is larger than that of the slope parts 22a, 23a, 24a. .

そして、地上面Ｇにある運搬車両Ｃを荷台１１０に搬入する場合、運搬車両Ｃは、先ず、地上面Ｇと略同じ高さ位置に配置されている「歩み板Ｗの第１段差部２２の先端部」から第１斜面部２２ａに乗り上がり、第１斜面部２２ａを通って、第１段差部２２の第１水平面部２２ｂの位置に進入する。これにより、運搬車両Ｃは、地上面Ｇから１段差分・上段の位置に移動し、地上面Ｇから「約ｈ１（ｈ１＋接地板２１の厚さ寸法）ｍｍ」の高さ寸法分・上昇した状態になる。   When the transport vehicle C on the ground surface G is carried into the loading platform 110, the transport vehicle C is first arranged at “the first step portion 22 of the step board W that is disposed at substantially the same height position as the ground surface G. From the “tip portion”, it rides on the first slope portion 22a, passes through the first slope portion 22a, and enters the position of the first horizontal surface portion 22b of the first step portion 22. As a result, the transport vehicle C moves from the ground surface G to the position of one step / upper level, and rises from the ground surface G by the height dimension of “about h1 (h1 + thickness dimension of the ground plate 21) mm”. It becomes a state.

次に、運搬車両Ｃは、第１水平面部２２ｂと略同じ高さ位置に配置されている「歩み板Ｗの第２段差部２３の先端部」から第２斜面部２３ａを通って、第２段差部２３の第２水平面部２３ｂまで進入する。これにより、運搬車両Ｃは、第１水平面部２２ｂから１段差分・上段の位置に移動し、第１水平面部２２ｂから「ｈ１ｍｍ」の高さ寸法分・上昇した状態になる。なお、運搬車両Ｃは、地上面Ｇから見ると、２段差分・上段の位置に移動し、地上面Ｇから「約ｈ２（ｈ２（２＊ｈ１）＋（接地板２１の厚さ寸法））ｍｍ」の高さ寸法分・上昇した状態になる。   Next, the transport vehicle C passes through the second inclined surface portion 23a from the “tip portion of the second stepped portion 23 of the walk board W” disposed at substantially the same height as the first horizontal surface portion 22b, and then passes through the second inclined surface portion 23a. It enters to the second horizontal surface part 23b of the step part 23. As a result, the transport vehicle C moves from the first horizontal plane portion 22b to the position of one step / upper stage, and rises from the first horizontal plane portion 22b by a height dimension of “h1 mm”. In addition, when viewed from the ground surface G, the transport vehicle C moves to a position of two steps and an upper level, and from the ground surface G, “about h2 (h2 (2 * h1) + (thickness dimension of the ground plate 21))”. It will be in a state where it is raised by the height dimension of “mm”.

次に、運搬車両Ｃは、第２水平面部２２ｂと略同じ高さ位置に配置されている「歩み板Ｗの第３段差部２４の先端部」から第３斜面部２４ａを通って、第３段差部２４の第３水平面部２４ｂまで進入する。これにより、運搬車両Ｃは、第２水平面部２３ｂから１段差分・上段の位置に移動し、「ｈ１ｍｍ」の高さ寸法分・上昇する。なお、運搬車両Ｃは、地上面Ｇから見ると、３段差分・上段の位置に移動し、地上面Ｇから「約ｈ３（ｈ３（３＊ｈ１）＋（接地板２１の厚さ寸法））ｍｍ」の高さ寸法分・上昇する。
その後、運搬車両Ｃは、歩み板Ｗの第３段差部２４の第３水平面部２４ｂから荷台１１０の搭載面１１０ａに移動していき、荷台１１０の上に搬入される。 Next, the transport vehicle C passes through the third inclined surface portion 24a from the “tip portion of the third stepped portion 24 of the walk board W” disposed at substantially the same height position as the second horizontal surface portion 22b, and passes through the third inclined surface portion 24a. It enters to the third horizontal surface portion 24b of the step portion 24. As a result, the transport vehicle C moves from the second horizontal plane portion 23b to the position of one step and the upper step, and rises by the height dimension of “h1 mm”. In addition, when viewed from the ground surface G, the transport vehicle C moves to a position of three steps and an upper level, and from the ground surface G, “about h3 (h3 (3 * h1) + (thickness dimension of the ground plate 21))”. Increases by the height of “mm”.
Thereafter, the transport vehicle C moves from the third horizontal surface portion 24 b of the third stepped portion 24 of the step board W to the mounting surface 110 a of the loading platform 110 and is carried onto the loading platform 110.

このように、本実施形態の歩み板Ｗは、倒伏状態にして、荷台１１０と地上面Ｇとの間に架設させると、地上面Ｇから連続的に繋がって荷台１１０の搭載面１１０ａまで延びる搬送路を形成する。また、この搬送路は、３つの段差部（第１段差部２２、第２段差部２３、第３段差部２４）により、地上面Ｇから荷台１１０の搭載面１１０ａに向けて、段階的に地上面Ｇからの高さ寸法が上昇していく構成になっている。
すなわち、本実施形態では、地上面Ｇから荷台１１０まで延びる搬送路（歩み板Ｗにより形成された搬送路）は、上述した従来技術のような「地上面から荷台まで直線状に延びる傾斜面」ではなく、段階的に地上面からの高さ寸法が大きくなる段差部（第１段差部２２、第２段差部２３、第３段差部２４）が形成された構成になっている。 As described above, when the walking board W of the present embodiment is placed in a lying state and is laid between the loading platform 110 and the ground surface G, the conveyance is continuously connected from the ground surface G and extends to the mounting surface 110a of the loading platform 110. Form a road. In addition, this conveyance path is grounded stepwise from the ground surface G toward the mounting surface 110a of the loading platform 110 by three step portions (first step portion 22, second step portion 23, and third step portion 24). The height dimension from the upper surface G increases.
That is, in this embodiment, the conveyance path (conveyance path formed by the step board W) extending from the ground surface G to the loading platform 110 is “an inclined surface extending linearly from the ground surface to the loading platform” as described above. Instead, stepped portions (the first stepped portion 22, the second stepped portion 23, and the third stepped portion 24) whose height dimension from the ground surface gradually increases are formed.

この構成によれば、運搬車両Ｃは、歩み板Ｗの各段差部（第１段差部２２、第２段差部２３、第３段差部２４）を登ることで、段階的に、地上面Ｇから上昇するようになる。また、このとき、運搬車両Ｃのフロントスポイラーは、車両Ｃと共に、段差部（第１段差部２２、第２段差部２３、第３段差部２４）の高さ寸法分（厚さ方向の寸法分）だけ、歩み板Ｗから離間する方向に押し上げられるため、「直線状に延びる傾斜面（段差が無い傾斜面）を形成する歩み板」を通る場合と比べ、車両Ｃのフロントスポイラーが、歩み板Ｗの搬送面Ｗａに干渉する可能性が軽減される。   According to this configuration, the transport vehicle C climbs from the ground surface G step by step by climbing the respective step portions (the first step portion 22, the second step portion 23, and the third step portion 24) of the step board W. To rise. At this time, the front spoiler of the transport vehicle C and the vehicle C together with the height dimension of the stepped portions (the first stepped portion 22, the second stepped portion 23, and the third stepped portion 24) (the dimension in the thickness direction). Therefore, the front spoiler of the vehicle C is compared with the case where the front spoiler of the vehicle C is compared with the case where it passes through a “step board that forms a linearly extending inclined surface (an inclined surface having no step)”. The possibility of interference with the transport surface Wa is reduced.

また、本実施形態では、上述したように、運搬車両Ｃのフロントスポイラーとの干渉を防ぐために、歩み板Ｗの搬送面Ｗａに段差部（第１段差部２２、第２段差部２３、第３段差部２４）を設けた構成を採用しているが、各段差部（第１段差部２２、第２段差部２３、第３段差部２４）の一端部側に斜面部を形成しているため、運搬車両Ｃがスムーズに段差部（第１段差部２２、第２段差部２３、第３段差部２４）の上に登ることができる。すなわち、本実施形態の歩み板Ｗは、段差部（第１段差部２２、第２段差部２３、第３段差部２４）を有する構成でありながら、車両Ｃをスムーズに荷台１１０まで通行させることができる。   In the present embodiment, as described above, in order to prevent interference with the front spoiler of the transport vehicle C, the stepped portions (the first stepped portion 22, the second stepped portion 23, the third stepped portion) are formed on the transport surface Wa of the step board W. Portion 24) is employed, but because the slope portion is formed on one end side of each step portion (first step portion 22, second step portion 23, third step portion 24), The transport vehicle C can smoothly climb on the stepped portions (the first stepped portion 22, the second stepped portion 23, and the third stepped portion 24). That is, the walking board W of the present embodiment is configured to have stepped portions (the first stepped portion 22, the second stepped portion 23, and the third stepped portion 24), but allows the vehicle C to pass smoothly to the loading platform 110. Can do.

また、本実施形態の歩み板Ｗは、地上面Ｇから荷台１１０までの搬送路となる搬送面Ｗａに、複数の段差部（第１段差部２２、第２段差部２３、第３段差部２４）が設けられ、その段差部に、斜面部２２ａ、２３ａ、２４ａと、水平面部２２ｂ、２３ｂ、２４ｂとを形成している。また、搬送路を形成したときに、水平面部２２ｂ、２３ｂ、２４ｂは、一端部から他端部に向かう方向（図示するＸ方向）の長さ寸法が、斜面部２２ａ、２３ａ、２４ａのものより大きくなっている。この構成によれば、地上面Ｇから荷台１１０まで延びる搬送路において、各斜面部２２ａ、２３ａ、２４ａの長さを短くできるため、運搬車両Ｃのフロントスポイラーが歩み板Ｗに干渉する可能性を軽減できる。   Further, the walking board W of the present embodiment has a plurality of stepped portions (first stepped portion 22, second stepped portion 23, and third stepped portion 24) on a transport surface Wa serving as a transport path from the ground surface G to the loading platform 110. ), And slope portions 22a, 23a, and 24a and horizontal surface portions 22b, 23b, and 24b are formed at the stepped portions. Further, when the transport path is formed, the horizontal plane portions 22b, 23b, 24b have a length dimension in the direction from the one end portion toward the other end portion (the X direction shown in the drawing) from that of the slope portions 22a, 23a, 24a. It is getting bigger. According to this configuration, since the length of each inclined surface portion 22a, 23a, 24a can be shortened in the conveyance path extending from the ground surface G to the loading platform 110, the possibility that the front spoiler of the transport vehicle C interferes with the step board W is reduced. it can.

なお、本発明は、上述した実施形態に限定されるものではなく、その要旨の範囲内において種々の変更が可能である。   In addition, this invention is not limited to embodiment mentioned above, A various change is possible within the range of the summary.

例えば、上述した実施形態では、歩み板Ｗを倒伏させて荷台１１０と地上面Ｇとの間に架設した状態にして、歩み板により地上面Ｇから連続的に繋がって荷台１１０まで延びる搬送路を形成したときに、歩み板Ｗの搭載面１１０ａに、段階的に地上面Ｇからの高さ寸法が上昇する、３段の段差部（第１段差部２２、第２段差部２３、第３段差部２４）を設けているが、特にこれに限定されるものではない。段差部が４段以上であってもよいし、段差部が２段であってもよい。   For example, in the above-described embodiment, the transfer path extending from the ground surface G to the loading platform 110 is continuously connected to the loading platform 110 by the walking platform, with the walking platform W lying down between the loading platform 110 and the ground surface G. When formed, the three-level stepped portion (first stepped portion 22, second stepped portion 23, third stepped portion) whose height dimension from the ground surface G gradually increases on the mounting surface 110a of the step board W. However, the present invention is not limited to this. The step portion may be four or more steps, or the step portion may be two steps.

また、上述した実施形態の歩み板１０では、運搬車両Ｃのタイヤが通る、一対の歩み板本体部２０を有する構成になっているが、特にこれに限定されるものではない。例えば、基端部１０に、基端部１０と同じ横幅寸法に形成された「１枚の歩み板本体部」が取り付けられている構成になっていても良い。この場合は、連結部３０が不要になる。また、歩み板本体部の一方面の搬送面には、歩み板本体部２０と同様、複数の段差部が形成されているものとする。   Moreover, in the step board 10 of embodiment mentioned above, although it has the structure which has a pair of step board main-body part 20 with which the tire of the conveyance vehicle C passes, it is not limited to this in particular. For example, the base end portion 10 may be configured such that “one step board main body portion” formed in the same width dimension as the base end portion 10 is attached. In this case, the connection part 30 becomes unnecessary. Further, it is assumed that a plurality of stepped portions are formed on the conveyance surface on one side of the step board main body, similarly to the step board main body 20.

Ｃ…運搬車両
Ｇ…地上面

１００…車両運搬車
１０１…車体フレーム
１０３…チルトフレーム
１１０…荷台
１１０ａ…
１２０…荷台接続部材
１２０ａ…回動部
１２０ｂ…アーム部
１３０…ヒンジ軸

Ｗ…歩み板
Ｗａ…搬送面
Ｗｂ…接地面
１０…基端部
１０ａ…底壁
１０ｂ…側壁
１０ｃ…底壁

２０…歩み板本体部
２１…接地板
２２…第１段差部
２２ａ…第１斜面部
２２ｂ…第１水平面部
２３…第２段差部
２３ａ…第２斜面部
２３ｂ…第２水平面部
２４…第３段差部
２４ａ…第３斜面部
２４ｂ…第３水平面部
２８ａ…補強部材
２８ｂ…補強部材
２８ｃ…補強部材
３０…連結部 C ... Transport vehicle G ... Ground level

DESCRIPTION OF SYMBOLS 100 ... Vehicle carrier 101 ... Body frame 103 ... Tilt frame 110 ... Loading platform 110a ...
120 ... loading platform connection member 120a ... rotating part 120b ... arm part 130 ... hinge shaft

W ... Walking board Wa ... Conveying surface Wb ... Grounding surface 10 ... Base end 10a ... Bottom wall 10b ... Side wall 10c ... Bottom wall

20 ... Step board main body portion 21 ... Ground plate 22 ... First step portion 22a ... First slope portion 22b ... First horizontal surface portion 23 ... Second step portion 23a ... Second slope portion 23b ... Second horizontal surface portion 24 ... Third Step portion 24a ... third slope portion 24b ... third horizontal surface portion 28a ... reinforcing member 28b ... reinforcing member 28c ... reinforcing member 30 ... connecting portion

Claims (3)

車両運搬車の荷台の後端部において、該荷台の荷物搭載面から略垂直に立設した起立状態と、該荷物搭載面と略面一をなして該荷台より後方に延びる倒伏状態とになるように、該荷台の後端部に回動自在に支持されている歩み板であって、
一端部が自由端になっており、他端部側が前記荷台の後端部に回動自在に支持されている共に、その一方面が搬送面になっており、
前記倒伏状態にしてその自由端を地上面に接地させると、前記搬送面が上方に向くと共に、前記荷台と前記地上面との間に架設され、前記搬送面が該地上面から連続的に繋がり該荷台まで延びる搬送路を形成し、
前記搬送面には、複数の段差部が形成されており、
前記搬送面は、前記搬送路を形成したときに、前記複数の段差部により、前記地上面から前記荷台に向けて、段階的に地上面からの高さ寸法が大きくなるようになっていることを特徴とする歩み板。 At the rear end of the loading platform of the vehicle transporter, there is an upright state standing substantially vertically from the load carrying surface of the load carrying platform, and a lying state extending rearward from the load carrying platform and substantially flush with the load carrying surface. A step board that is rotatably supported at the rear end of the loading platform,
One end is a free end, the other end is rotatably supported by the rear end of the cargo bed, and one surface thereof is a transport surface,
When the free end is grounded to the ground surface in the lying down state, the transport surface faces upward and is laid between the cargo bed and the ground surface, and the transport surface is continuously connected from the ground surface. Forming a conveying path extending to the loading platform;
A plurality of stepped portions are formed on the transport surface,
When the transport path is formed, the transport surface is configured such that the height from the ground surface gradually increases from the ground surface toward the cargo bed due to the plurality of stepped portions. A walk board characterized by 複数の前記段差部には、いずれも、前記搬送路を形成したときに、その一端部側に、一端部側から他端部側に向けて地上面からの高さ寸法が徐々に大きくなる斜面部が形成されていることを特徴とする請求項１に記載の歩み板。   In each of the plurality of stepped portions, a slope whose height from the ground surface gradually increases from one end to the other end when one of the transport paths is formed. The step board according to claim 1, wherein a portion is formed. 複数の前記段差部には、前記搬送路を形成したときに、前記斜面部に加えて、該斜面部の頂部から他端部に向けて水平面部が形成されるようになっており、且つ前記搬送路を形成したときに、前記水平面部は、一端部から他端部に向かう方向の長さ寸法が、前記斜面部のものより大きくなっていることを特徴とする請求項２に記載の歩み板。   In the plurality of step portions, when the transport path is formed, in addition to the slope portion, a horizontal surface portion is formed from the top portion of the slope portion toward the other end portion, and 3. The step according to claim 2, wherein when the transport path is formed, the horizontal surface portion has a length dimension in a direction from one end portion toward the other end portion that is larger than that of the slope portion. Board.

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