JP7391489B2 - Loading platform lifting device - Google Patents

Loading platform lifting device Download PDF

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JP7391489B2
JP7391489B2 JP2023052054A JP2023052054A JP7391489B2 JP 7391489 B2 JP7391489 B2 JP 7391489B2 JP 2023052054 A JP2023052054 A JP 2023052054A JP 2023052054 A JP2023052054 A JP 2023052054A JP 7391489 B2 JP7391489 B2 JP 7391489B2
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loading platform
platform
loading
load receiving
road board
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JP2023103198A (en
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滋 池田
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Shinmaywa Industries Ltd
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Shinmaywa Industries Ltd
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Description

本発明は、荷受台を昇降させて車両の荷台に対する荷役作業を支援する荷受台昇降装置に関し、好ましくは、荷台の床板の後端に床面より下がった段差を持つ車両に架装され、回動するアームにより荷受台を昇降させる荷受台昇降装置に係る。 The present invention relates to a loading platform lifting and lowering device that raises and lowers a loading platform to support cargo handling operations on a loading platform of a vehicle, and is preferably mounted on a vehicle having a step lower than the floor surface at the rear end of the floor plate of the loading platform. The present invention relates to a loading platform elevating device that raises and lowers a loading platform using a movable arm.

荷受台昇降装置は、車両の荷台の床面の高さと接地する高さとの間で荷受台を昇降させ、車両の荷台に対する荷物等の積み卸し作業を支援する装置である。この種の荷受台昇降装置においては、荷受台に載せる荷物によって荷受台の面積拡大が必要な場合がある。荷受台の面積を拡大するものとして、荷受台の基部に延長荷受台を取り付けられるようにしたものがある(特許文献1)。 A loading platform elevating device is a device that lifts and lowers a loading platform between the height of the floor surface of a vehicle loading platform and the height at which it touches the ground, and supports loading and unloading work of cargo and the like onto the vehicle loading platform. In this type of loading platform lifting/lowering device, the area of the loading platform may need to be expanded depending on the cargo to be placed on the loading platform. As a device for expanding the area of a cargo receiving platform, there is a device in which an extension receiving platform can be attached to the base of the receiving platform (Patent Document 1).

特許第5714309号公報Patent No. 5714309

荷受台昇降装置においては、昇降する荷受台がその昇降中に荷台に接触することを回避するために僅かではあるが多少のクリアランスが予め設定されることがある。これに加えて、荷台の床面の高さまで上昇した際の荷受台と荷台との間に例えば製作精度や取り付け精度によって予期せず若干の隙間が生じ得る。また車両の荷台の床面の後端部には水切りと呼ばれる段差が設けられる場合もある。そのため、こうした隙間や水切りがあると荷台と荷受台との間の台車の行き来の円滑性を阻害する。 In a loading platform elevating device, a certain amount of clearance may be set in advance to prevent the lifting platform from coming into contact with the loading platform while moving up and down. In addition, a slight gap may unexpectedly occur between the loading platform and the loading platform when the loading platform is raised to the floor level due to, for example, manufacturing accuracy or installation accuracy. In some cases, a step called a drainer is provided at the rear end of the floor surface of the vehicle's loading platform. Therefore, such gaps and drains impede the smooth movement of the cart between the loading platform and the loading platform.

そこで、車両の荷台には例えば回動反転式の道板と呼ばれる部材が設置される場合がある。荷受台が上昇した際にこの道板を手作業で反転させて荷台の縁部から突出させることで、荷受台と荷台との間に道板が架かった状態となる。必要に応じてこの道板を渡すことにより、荷台と荷受台との間で台車をスムーズに行き来させることができる。 Therefore, for example, a member called a rotary and reversible road board may be installed on the loading platform of the vehicle. When the cargo platform is raised, the road board is manually turned over and protruded from the edge of the cargo platform, so that the road board is suspended between the cargo platform and the cargo platform. By passing this road board as necessary, it is possible to smoothly move the cart between the cargo platform and the cargo receiving platform.

しかし、荷受台昇降装置を使用する度に荷台と荷受台との間に道板を手作業で渡すのは面倒であり、作業者にも負担を強いることになる。 However, it is troublesome to manually pass the road board between the loading platform and the loading platform each time the loading platform lifting device is used, and it also imposes a burden on the operator.

また、特許文献1のように荷受台の基部に延長荷受台を取り付けられる構成とすれば、適切な長さの延長荷受台を荷受台の基部に取り付けることで、荷受台と荷台との間の隙間を埋めることができる。しかし、延長荷受台を装着しても実体的には荷受台を基部側に広げて予め設定されているクリアランスを狭小化するだけで、荷受台昇降装置の架装精度の誤差を補正、さらには水切りによる隙間を狭める点ではまだ十分ではない。 In addition, if the configuration is such that an extended loading platform can be attached to the base of the loading platform as in Patent Document 1, by attaching an extended loading platform of an appropriate length to the base of the loading platform, the distance between the loading platform and the loading platform can be increased. can fill in the gaps. However, even if an extended loading platform is installed, the practical effect is simply expanding the loading platform toward the base and narrowing the preset clearance, which can correct errors in mounting accuracy of the loading platform lifting device, and It is still not enough to narrow the gap caused by draining.

本発明の目的は、荷台と荷受台との間に道板を手作業で渡す必要がなく、台車を用いた荷役作業を効率的に行うことができ、水切りによる隙間も効果的に狭めることができる荷受台昇降装置を提供することにある。 It is an object of the present invention to eliminate the need to manually pass a road board between a loading platform and a loading platform, to enable efficient loading and unloading work using a trolley, and to effectively narrow the gap caused by draining. The purpose of the present invention is to provide a loading platform lifting and lowering device that can be used.

上記目的を達成するために、本発明は、荷台の床板の端に床面より下がった段差部を持つ車両に架装される荷受台昇降装置において、前記車両の荷台に対して上下に回動するリフトアームと、前記リフトアームの先端に連結された荷受台と、前記荷受台の前記荷台との対向部に設けられた道板とを備え、前記道板は、前記荷受板の裏面に固定される固定部と、前記固定部から折れ曲がり、前記荷受板の前記荷台との対向端面に沿って立ち上がる立上部と、前記立上部から前記荷台に向かって折れ曲がり、前記荷受板の荷受面に連なって前記荷台と前記荷受板との間に位置する主部とを含んで構成されており、前記荷受台が円弧軌道を描いて前記荷台の床面の高さまで上昇した状態で、前記主部が、前記荷台の段差部の上側に重なり、前記荷台の床面と前記荷受台との間に位置するように構成されている荷受台昇降装置を提供する。リフトアームを介した荷受台の昇降動作に適した形状の道板を備えることで、荷台側との間に生じる隙間を狭めるだけでなく、必要最小限の大きさとして軽量化を果たす構成となっている。 In order to achieve the above object, the present invention provides a loading platform elevating device mounted on a vehicle having a step portion lowered from the floor surface at the end of the floor plate of the loading platform, which can be rotated up and down with respect to the loading platform of the vehicle. a lift arm connected to the tip of the lift arm, and a road board provided at a portion of the cargo board facing the cargo board, the road board being fixed to the back surface of the cargo board. a fixed part that is bent from the fixed part and stands up along an end surface of the load receiving plate opposite to the loading platform; The main part is configured to include a main part located between the cargo platform and the cargo receiving plate, and in a state where the cargo receiving platform is raised to the height of the floor surface of the cargo platform while drawing an arcuate trajectory, the main part: A loading platform elevating device is provided, which is configured to overlap above a stepped portion of the loading platform and to be located between the floor surface of the loading platform and the loading platform. By providing a road plate with a shape suitable for lifting and lowering the loading platform via the lift arm, the structure not only narrows the gap between the loading platform and the loading platform, but also reduces weight by keeping the size to the minimum necessary. ing.

本発明によれば、荷台と荷受台との間に道板を手作業で渡す必要がなく、台車を用いた荷役作業を効率的に行うことができ、水切りによる隙間も効果的に狭めることができる。 According to the present invention, there is no need to manually pass a road board between the loading platform and the loading platform, cargo handling work using a trolley can be performed efficiently, and gaps caused by draining can also be effectively narrowed. can.

本発明の一実施形態に係る荷受台昇降装置を搭載した車両の全体構造を表す側面図A side view showing the overall structure of a vehicle equipped with a loading platform elevating device according to an embodiment of the present invention 本発明の一実施形態に係る荷受台昇降装置の側面図A side view of a loading platform elevating device according to an embodiment of the present invention 本発明の一実施形態に係る荷受台昇降装置の基端側荷受台の下面図A bottom view of the proximal loading platform of the loading platform lifting device according to an embodiment of the present invention 図3中のIV-IV線による部分矢視断面図Partial cross-sectional view taken along line IV-IV in Figure 3 図3中のV-V線による部分矢視断面図Partial cross-sectional view taken along line V-V in Figure 3

以下に図面を用いて本発明の実施の形態を説明する。 Embodiments of the present invention will be described below using the drawings.

-荷受台昇降装置-
図1は本発明の一実施形態に係る荷受台昇降装置を搭載した車両の全体構造を表す側面図、図2は図1の荷受台昇降装置の側面図、図3は後述する基端側荷受台21の下面図である。また、図4は図3中のIV-IV線による部分矢視断面図、図5は図3中のV-V線による部分矢視断面図である。本願明細書においては、図1-図5における左右を荷受台昇降装置の前後とする。本実施形態では荷受台昇降装置を車両の後部に積載して荷受台を車両の後側に引き出す場合を例示しており、荷受台昇降装置の前後方向が車両の前後方向に一致している。但し、車両の側部に荷受台を引き出すように荷受台昇降装置を積載する場合もある。その場合には、荷受台昇降装置の前後方向は車両の前後方向に直交する。
- Loading platform lifting device -
FIG. 1 is a side view showing the overall structure of a vehicle equipped with a loading platform elevating device according to an embodiment of the present invention, FIG. 2 is a side view of the loading platform lifting device of FIG. 1, and FIG. 3 is a proximal side loading device described later. It is a bottom view of the stand 21. 4 is a partial sectional view taken along the line IV-IV in FIG. 3, and FIG. 5 is a partial sectional view taken along the line V-V in FIG. 3. In the present specification, the left and right sides in FIGS. 1 to 5 are the front and rear of the loading platform lifting device. In this embodiment, a case is illustrated in which the loading platform elevating device is loaded in the rear of the vehicle and the loading platform is pulled out to the rear of the vehicle, and the front-rear direction of the loading platform lifting device coincides with the longitudinal direction of the vehicle. However, there are cases where a loading platform elevating device is loaded on the side of the vehicle so that the loading platform can be pulled out. In that case, the front-rear direction of the loading platform lifting device is orthogonal to the front-rear direction of the vehicle.

図1に示した車両は、車枠(シャシフレーム)Fと、車枠Fの前方に設けた運転室Cとを備えている。車枠Fの上部には、荷台Lが搭載される。荷箱も荷台の一種である。本実施形態では、車枠Fの後部下側に荷受台昇降装置1が積載されている。この荷受台昇降装置1は、例えば車両の走行時には荷受台(プラットフォーム)20を折り畳み、車枠Fの下側に引き込んで格納する。一方で荷役作業(荷台に対する荷物の積卸作業)時には、荷受台20を車枠Fの外側(本実施形態では後方)に引き出して展開し、荷台の床面高さと接地高さとの間で昇降させる(図1)。 The vehicle shown in FIG. 1 includes a vehicle frame (chassis frame) F and a driver's cab C provided in front of the vehicle frame F. A loading platform L is mounted on the upper part of the vehicle frame F. A cargo box is also a type of cargo platform. In this embodiment, a loading platform elevating device 1 is loaded on the rear lower side of the vehicle frame F. For example, when the vehicle is running, the loading platform elevating device 1 folds up the loading platform 20 and draws it into the lower side of the vehicle frame F for storage. On the other hand, during cargo handling work (loading and unloading of cargo to and from the cargo platform), the cargo receiving platform 20 is pulled out to the outside of the vehicle frame F (to the rear in this embodiment), and is raised and lowered between the floor surface height of the cargo platform and the ground contact height. (Figure 1).

図2に示したように、荷受台昇降装置1は、荷受台20、スライダユニット30、リフタユニット40、パワーユニット(不図示)及び制御装置(不図示)を備えている。スライダユニット30は、荷受台20等を前後方向に移動させるアクチュエータを含むユニットである。リフタユニット40は、荷受台20を昇降させるアクチュエータを含むユニットである。パワーユニットは、スライダユニット30及びリフタユニット40を駆動するシステムである。制御装置は、パワーユニットを制御する装置である。スライダユニット30、リフタユニット40及び荷受台20について順次説明する。 As shown in FIG. 2, the loading platform elevating device 1 includes a loading platform 20, a slider unit 30, a lifter unit 40, a power unit (not shown), and a control device (not shown). The slider unit 30 is a unit that includes an actuator that moves the cargo receiving platform 20 and the like in the front-back direction. The lifter unit 40 is a unit that includes an actuator that raises and lowers the loading platform 20. The power unit is a system that drives the slider unit 30 and lifter unit 40. The control device is a device that controls the power unit. The slider unit 30, lifter unit 40, and loading platform 20 will be explained in order.

-スライダユニット-
スライダユニット30は、左右のガイドレール31、スライダ32及びスライドシリンダ33を備えている。左右のガイドレール31は、車枠Fの後部下側に取り付けられており、互いに平行に前後に延びている。スライダ32は、左右のガイドレール31にスライド可能に取り付けられ、ガイドレール31に沿って前後に移動可能である。スライドシリンダ33は、複動式の油圧シリンダであり、ガイドレール31及びスライダ32に適宜支持部材を介して両端が固定されている。スライドシリンダ33の伸縮動作によりガイドレール31に沿ってスライダ32が前後に移動し、リフタユニット40を介してスライダ32に支持された荷受台20が前後に移動する。スライダ32には、荷受台20の格納動作時に荷受台20を凭せ掛けるための格納用支持ローラ34が設けられている。格納用支持ローラ34は、荷受台昇降装置1の左右方向の中央に位置している。
-Slider unit-
The slider unit 30 includes left and right guide rails 31, a slider 32, and a slide cylinder 33. The left and right guide rails 31 are attached to the rear lower side of the vehicle frame F, and extend parallel to each other back and forth. The slider 32 is slidably attached to the left and right guide rails 31 and is movable back and forth along the guide rails 31. The slide cylinder 33 is a double-acting hydraulic cylinder, and both ends thereof are fixed to the guide rail 31 and the slider 32 via appropriate support members. The slider 32 moves back and forth along the guide rail 31 due to the expansion and contraction of the slide cylinder 33, and the cargo receiving platform 20 supported by the slider 32 via the lifter unit 40 moves back and forth. The slider 32 is provided with a storage support roller 34 for leaning the loading platform 20 during the storage operation of the loading platform 20. The storage support roller 34 is located at the center of the loading platform lifting device 1 in the left-right direction.

-リフタユニット-
リフタユニット40は、チルトアーム41、リフトアーム42、コンプレッションアーム(不図示)及びリフトシリンダ(不図示)を左右一組ずつ備えている。チルトアーム41は、スライダ32に対して上部がピンを介して連結され、下部が前後に回動する。リフトアーム42は、前端部がチルトアーム41に、後端部が荷受台20に、左右に延びる軸を介してそれぞれ回動可能に連結されていて、スライダ32や車両の荷台Lに対して上下に回動する。左右のリフトアーム42は、左右に延びる連結バーにより連結されており、これによりリフタユニット40の剛性が高められている。コンプレッションアームは、前端部がスライダ32に、後端部が荷受台20に、左右に延びる軸を介してそれぞれ回動可能に連結されている。リフトシリンダは、単動式油圧シリンダ(複動式でも良い)であり、本実施形態では、前端(ロッド側)がチルトアーム41の下部に、後端(ボトム側)がリフトアーム42に、それぞれ回動可能に連結されている。リフトアーム42及びコンプレッションアームは、スライダ32に対して荷受台20を昇降可能に連結する平行リンクを形成する。この平行リンクがリフトシリンダの伸縮駆動に伴って上下に回動駆動することで、荷受台20が水平姿勢を保ち円弧軌道O(図2)を描いて昇降する。
-Lifter unit-
The lifter unit 40 includes a tilt arm 41, a lift arm 42, a compression arm (not shown), and a lift cylinder (not shown), one set on each side. The tilt arm 41 has an upper portion connected to the slider 32 via a pin, and a lower portion that rotates back and forth. The lift arm 42 is rotatably connected to the tilt arm 41 at the front end and to the loading platform 20 at the rear end through shafts extending left and right, and is vertically connected to the slider 32 and the loading platform L of the vehicle. Rotate to. The left and right lift arms 42 are connected by a connecting bar extending left and right, thereby increasing the rigidity of the lifter unit 40. The compression arm is rotatably connected to the slider 32 at the front end and to the loading platform 20 at the rear end via a shaft extending left and right. The lift cylinder is a single-acting hydraulic cylinder (double-acting type is also acceptable), and in this embodiment, the front end (rod side) is connected to the lower part of the tilt arm 41, and the rear end (bottom side) is connected to the lift arm 42. Rotatably connected. The lift arm 42 and the compression arm form a parallel link that connects the load receiving platform 20 to the slider 32 so as to be movable up and down. This parallel link rotates up and down as the lift cylinder expands and contracts, so that the loading platform 20 maintains a horizontal position and moves up and down in an arcuate trajectory O (FIG. 2).

-荷受台-
荷受台20は、荷物等を受けて昇降する台であり、リフトアーム42及びコンプレッションアームの先端に連結された基端側荷受台21、及び基端側荷受台21の後部にヒンジ(不図示)を介して回動可能に連結された先端側荷受台22を備えている。先端側荷受台22は、ヒンジを支点に回動可能であり、展開姿勢(図1の二点鎖線)から左側面視で反時計回りに反転(180度回動)され、基端側荷受台21の上側に折り重ねられて荷台Lの下方に収納された状態となる(図1の実線)。折り畳んだ状態の荷受台20の後端面は、車両のバンパを構成する。荷受台20の左右の幅は、例えば荷台Lの間口の幅と同程度であり、左右の車枠Fの外法寸法よりも広い。本実施形態の先端側荷受台22は、非折り畳み式である。つまり、荷受台20は、先端側荷受台22を1枚のみ含んだ2枚折れ構造である。
-Logging stand-
The loading platform 20 is a platform that lifts and lowers while receiving cargo, etc., and includes a proximal loading platform 21 connected to the tips of the lift arm 42 and the compression arm, and a hinge (not shown) at the rear of the proximal loading platform 21. It is provided with a tip-side load receiving stand 22 rotatably connected via a. The distal side loading platform 22 is rotatable about a hinge, and is reversed (rotated 180 degrees) counterclockwise from the unfolded position (double-dashed line in FIG. 1) when viewed from the left side, and rotates by 180 degrees. 21 and stored below the loading platform L (solid line in FIG. 1). The rear end surface of the cargo receiving platform 20 in the folded state constitutes a bumper of the vehicle. The left and right widths of the loading platform 20 are, for example, approximately the same as the width of the frontage of the loading platform L, and are wider than the outer dimensions of the left and right vehicle frames F. The tip side load receiving platform 22 of this embodiment is of a non-folding type. In other words, the loading platform 20 has a two-piece folded structure including only one loading platform 22 on the front end side.

基端側荷受台21及び先端側荷受台22は、それぞれ荷受板23を有しており、これら荷受板23の上面が荷受面S1を構成する。荷受面S1は、荷物等を受ける上向きの面であり、基端側荷受台21の荷受面S1は常時上向きである。先端側荷受台22の荷受面S1は、展開時は上向きであるが格納時は下を向く。荷受板23は、アルミニウム製で押出成形により中空に形成されている。例えば基端荷受台21の前部(前端付近)には、図4に示すように、左右に直線的に延びて荷受板23を左右に貫通する空洞23aが設けられている。本実施形態において、この空洞23aは、スリット23bによって下向きに、つまり裏面S2にも開口している。スリット23bは、空洞23aに沿って裏面S2に設けられ、荷受板23を左右に貫通する。 The proximal loading platform 21 and the leading end loading platform 22 each have a loading receiving plate 23, and the upper surface of these loading receiving plates 23 constitutes a loading surface S1. The cargo receiving surface S1 is an upwardly facing surface that receives cargo and the like, and the cargo receiving surface S1 of the proximal cargo receiving platform 21 always faces upward. The load receiving surface S1 of the front end side load receiving stand 22 faces upward when unfolded, but faces downward when stored. The cargo receiving plate 23 is made of aluminum and is formed hollow by extrusion molding. For example, as shown in FIG. 4, a cavity 23a is provided in the front part (near the front end) of the base end cargo receiving stand 21, extending linearly from side to side and penetrating the receiving plate 23 from side to side. In this embodiment, the cavity 23a opens downward, that is, also to the back surface S2, through a slit 23b. The slit 23b is provided on the back surface S2 along the cavity 23a, and penetrates the cargo receiving plate 23 from side to side.

また、荷受板23の裏面S2には、左右一対のスチフナ24が設けられている。これらスチフナ24は、基端側荷受台21及び先端側荷受台22に設けられており、荷受台20が展開すると基端側荷受台21に設けたものと先端側荷受台22に設けたものが連なり、左右から見ると基端から先端(後方)に向かって薄くなる三角形状になる。 Further, a pair of left and right stiffeners 24 are provided on the back surface S2 of the cargo receiving plate 23. These stiffeners 24 are provided on the proximal loading platform 21 and the distal loading platform 22, and when the loading platform 20 is expanded, the stiffeners 24 are provided on the proximal loading platform 21 and the distal loading platform 22. When viewed from the left and right, they form a triangular shape that becomes thinner from the base to the tip (rearward).

また、下降した荷受台20がリフトアーム42に干渉しないように、荷受台20の荷受板23の前縁には、左右のリフトアーム42の位置に対応して左右一対の切欠き25(図3)が形成されている。図3は基端側荷受台21の左半部を表しており、左側の切欠き25のみを図示している。これら切欠き25は、それぞれフラップ26でカバーされている。左右のフラップ26は、切欠き25の形状に応じて上下方向に見て矩形状に形成されている(図3)。フラップ26は、左右に延びる回動軸27を介して後端部が基端側荷受台21の荷受板23に連結されており、前部が上下に回動して切欠き25を開閉する。フラップ26は基端側荷受台21の荷受面S1に対して上方向に開動作する。フラップ26の回動範囲の下限は、基端側荷受台21の荷受面S1とフラップ26が面一になる角度(荷受面S1が水平であれば水平)であり、この角度を超えてフラップ26が下方に回動しないようにフラップ26の回動範囲がストッパで規定されている。 In addition, in order to prevent the lowered load receiving platform 20 from interfering with the lift arm 42, the front edge of the load receiving plate 23 of the load receiving platform 20 has a pair of left and right notches 25 (FIG. ) is formed. FIG. 3 shows the left half of the proximal loading platform 21, and only the left notch 25 is shown. These notches 25 are each covered with a flap 26. The left and right flaps 26 are formed into a rectangular shape when viewed in the vertical direction according to the shape of the notch 25 (FIG. 3). The rear end of the flap 26 is connected to the load receiving plate 23 of the proximal load receiving platform 21 via a rotation shaft 27 extending left and right, and the front portion rotates up and down to open and close the notch 25. The flap 26 opens upward relative to the load receiving surface S1 of the base end side load receiving stand 21. The lower limit of the rotation range of the flap 26 is the angle at which the load receiving surface S1 of the proximal side load receiving stand 21 and the flap 26 are flush (horizontal if the load receiving surface S1 is horizontal), and beyond this angle, the flap 26 The rotation range of the flap 26 is defined by a stopper so that the flap 26 does not rotate downward.

-道板-
ここで、荷台Lの床板FLの端部(本例では後端部)には、床面SL(床板FLの上面)よりも一段下がった段差部STが形成されている。この段差部STは水切り段差とも呼ばれ、閉じた状態の荷台Lの扉DR(図4)がこの段差部STに位置する。
- Road board -
Here, a stepped portion ST that is one step lower than the floor surface SL (the upper surface of the floor plate FL) is formed at the end portion (in this example, the rear end portion) of the floor plate FL of the loading platform L. This step ST is also called a draining step, and the door DR (FIG. 4) of the cargo platform L in a closed state is located at this step ST.

本実施形態の荷受台昇降装置1には、道板60,70が備わっている。これら道板60,70は、荷受台20(基端側荷受台21)の荷台Lとの対向部に設けられている。ここでいう荷受台20の荷台Lとの対向部とは、荷受台20の荷受面S1が荷台Lの床面SLの高さにあるときに荷台Lの床面SLの縁部に前後に対向する部分であり、具体的には基端側荷受台21の前部である。道板60,70は、荷受台20が荷台Lの床面SLの高さに位置する状態で、荷台Lの床面SLと荷受面S1との間に空く隙間を狭める役割を果たす。道板60,70は、荷受台20の荷受板23とは異なる材料、本実施形態ではステンレスで形成されている。但し、道板60,70を荷受板23と同じ材料で形成することもできる。 The loading platform elevating device 1 of this embodiment is equipped with road boards 60 and 70. These road boards 60, 70 are provided at a portion of the loading platform 20 (base end loading platform 21) facing the loading platform L. Here, the portion of the loading platform 20 facing the loading platform L refers to the portion facing the edge of the floor surface SL of the loading platform L when the loading surface S1 of the loading platform 20 is at the height of the floor surface SL of the loading platform L. Specifically, it is the front part of the proximal loading platform 21. The road boards 60 and 70 serve to narrow the gap between the floor surface SL of the cargo platform L and the cargo receiving surface S1 when the cargo platform 20 is located at the height of the floor surface SL of the cargo platform L. The road plates 60 and 70 are made of a material different from that of the cargo receiving plate 23 of the cargo receiving platform 20, and in this embodiment, stainless steel. However, the road boards 60 and 70 can also be made of the same material as the cargo receiving board 23.

道板60は、図4に示しように、荷受台20の荷受板23(少なくとも基端側荷受台21の荷受板23の前端部)よりも薄い板材を曲げ加工して形成され、固定部61、立上部62及び主部63を含んで構成されている。本実施形態において、固定部61、立上部62及び主部63は、折れ曲がり部分を除いてフラットに形成されている。この道板60は、可動部がない非可動構造であり、ボルト68及びナット69により荷受板23に片持ち支持されている。道板60を構成する板材は、片持ち支持構造の道板60に想定最大荷重がかかっても、道板60の左右の幅や前後長、支点位置等を考慮して座屈しない範囲で薄いものが好ましく選択される。本実施形態において、道板60を構成する板材の板厚は、荷受板23における空洞23aを囲う壁部の板厚t程度(例えば4,5mm程度)であり、ボルト68の頭部やナット69の厚みよりも薄い。 As shown in FIG. 4, the road board 60 is formed by bending a plate material that is thinner than the cargo receiving plate 23 of the cargo receiving platform 20 (at least the front end of the cargo receiving plate 23 of the proximal receiving platform 21). , a rising part 62 and a main part 63. In this embodiment, the fixed portion 61, the rising portion 62, and the main portion 63 are formed flat except for bent portions. The road board 60 has a non-movable structure with no movable parts, and is supported in a cantilever manner by the load receiving board 23 with bolts 68 and nuts 69. The board material constituting the road board 60 is thin enough that it will not buckle, taking into consideration the left and right width, front and back length, fulcrum position, etc. of the road board 60, even if the expected maximum load is applied to the road board 60, which has a cantilever support structure. are preferably selected. In this embodiment, the thickness of the plate material constituting the road board 60 is approximately the thickness t of the wall portion surrounding the cavity 23a of the cargo receiving plate 23 (for example, approximately 4.5 mm), and the thickness of the plate material composing the road board 60 is approximately the same as that of the wall portion surrounding the cavity 23a (for example, approximately 4.5 mm). thinner than the thickness of

固定部61は、道板60を荷受台20に固定する部位であり、ボルト68及びナット69により基端側荷受台21の荷受板23の裏面S2に固定される。固定部61は、基端側荷受台21の裏面S2の前端から後方に延びてスリット23bを少し越える位置を後端としており、その前後長はボルト68の頭部及びナット69の直径よりも少し長い程度である。 The fixing portion 61 is a part for fixing the road board 60 to the load receiving platform 20, and is fixed to the back surface S2 of the load receiving plate 23 of the proximal end side receiving platform 21 with bolts 68 and nuts 69. The fixing part 61 extends rearward from the front end of the back surface S2 of the base-side loading platform 21, and has a rear end at a position slightly beyond the slit 23b, and its front-to-back length is slightly longer than the diameter of the head of the bolt 68 and the nut 69. It's about a long time.

なお、ボルト68の頭部又はナット69(本実施形態ではナット69)は、荷受板23の空洞23aに収容され、ボルト68の軸(ネジ部等)は荷受板23のスリット23bを通り上下に延びている。荷受板23の裏面S2からのボルト68又はナット69の最大突き出し量(本実施形態ではボルト68の突き出し量)は、スチフナ24の上下の厚みよりも小さい。 The head of the bolt 68 or the nut 69 (in this embodiment, the nut 69) is accommodated in the cavity 23a of the load receiving plate 23, and the shaft (threaded portion, etc.) of the bolt 68 passes through the slit 23b of the load receiving plate 23 and moves up and down. It is extending. The maximum amount of protrusion of the bolt 68 or nut 69 from the back surface S2 of the load receiving plate 23 (the amount of protrusion of the bolt 68 in this embodiment) is smaller than the upper and lower thicknesses of the stiffener 24.

立上部62は、上下にオフセットした固定部61及び主部63を連結する部位であり、固定部61の前端から折れ曲がり、荷受板23の荷台Lとの対向端面S3に沿って荷受面S1の高さまで立ち上がる。 The rising part 62 is a part that connects the fixing part 61 and the main part 63 that are offset vertically, and is bent from the front end of the fixing part 61 and extends along the end surface S3 of the cargo receiving plate 23 facing the loading platform L to adjust the height of the cargo receiving surface S1. Stand up.

主部63は、荷受板23の荷受面S1に連なる部位であり、立上部62の上端から荷台Lに向かって(つまり前方に)折れ曲がっている。この道板60の主部63は、リフトアーム42の回動に伴って荷受台20と一体に円弧軌道Oを描いて上昇し荷台Lの床面SLの高さに至る過程で、荷台Lの端面(後端面)SRを越えて荷受台20の床面SLに接近する。荷受台20が荷台Lの床面SLの高さに位置するとき、道板60の主部63は、荷台Lの段差部ST(上向きの面)の上側に重なり、荷台Lの床面SLと荷受板23の荷受面S1との間に位置する。荷受台20が床面SLの高さに位置するとき、道板60の主部63の上面、荷台Lの床面SL、及び荷受台20の荷受面S1は、実質的に同じ高さに位置し(誤差は許容)、床面SLと荷受面S1との隙間が道板60の主部63によって狭められる。具体的には、主部63によって、基端側荷受台21と荷台Lの端面SRとの隙間L2を解消するとともに、段差部STによって生じる隙間L1が狭められる。 The main portion 63 is a portion connected to the load receiving surface S1 of the load receiving plate 23, and is bent from the upper end of the upright portion 62 toward the loading platform L (that is, forward). The main portion 63 of this road board 60 rises together with the loading platform 20 in an arcuate trajectory O as the lift arm 42 rotates, and in the process of reaching the height of the floor surface SL of the loading platform L, the main portion 63 of the loading platform L It approaches the floor surface SL of the loading platform 20 by passing over the end surface (rear end surface) SR. When the loading platform 20 is located at the height of the floor surface SL of the loading platform L, the main portion 63 of the road board 60 overlaps the upper side of the step ST (upward facing surface) of the loading platform L, and is in contact with the floor surface SL of the loading platform L. It is located between the receiving surface S1 of the receiving plate 23 and the receiving surface S1 of the receiving plate 23. When the loading platform 20 is located at the height of the floor surface SL, the upper surface of the main portion 63 of the road board 60, the floor surface SL of the loading platform L, and the loading surface S1 of the loading platform 20 are located at substantially the same height. (errors are allowed), and the gap between the floor surface SL and the cargo receiving surface S1 is narrowed by the main portion 63 of the road board 60. Specifically, the main portion 63 eliminates the gap L2 between the proximal loading platform 21 and the end surface SR of the loading platform L, and narrows the gap L1 caused by the stepped portion ST.

なお、主部63の前後長は、円弧軌道Oを描いて荷受台20が昇降する際、荷台Lの段差部STの後端X(荷台Lの端面SRの上端)に主部63が干渉しない範囲で、極力長く設定することが望ましい。そのため、道板60を構成する板材の板厚が薄いほど、主部63の前後長を長くとることができ、床面SLと荷受面S1との隙間をより狭められる。 The longitudinal length of the main part 63 is such that the main part 63 does not interfere with the rear end X of the step ST of the cargo platform L (the upper end of the end surface SR of the cargo platform L) when the loading platform 20 moves up and down in an arcuate trajectory O. It is desirable to set it as long as possible within the range. Therefore, the thinner the plate material constituting the road board 60, the longer the longitudinal length of the main portion 63 can be, and the narrower the gap between the floor surface SL and the cargo receiving surface S1.

また、道板60は、荷受台20の昇降時に干渉する障害物の有無に応じ、必要に応じて左右方向の複数個所で分割し、間欠的に構成することができる。本実施形態では、道板60を左右方向に5分割した構成を図3に例示している。説明のため、ここでは左右方向の最も外側の道板60を道板60a、左右方向の中央の道板60を道板60b、道板60a,60bの間の道板60を道板60cと記載する。 Further, the road board 60 can be divided into a plurality of locations in the left-right direction as necessary, and configured intermittently, depending on the presence or absence of obstacles that interfere with the lifting and lowering of the loading platform 20. In this embodiment, a configuration in which the road board 60 is divided into five parts in the left-right direction is illustrated in FIG. 3 . For the sake of explanation, here, the outermost road board 60 in the left and right direction is referred to as a road board 60a, the center road board 60 in the left and right direction is referred to as a road board 60b, and the road board 60 between the road boards 60a and 60b is referred to as a road board 60c. do.

道板60b,60cの間のスペースZは、荷受台20が荷台Lの床面の高さに上昇したときに、荷台Lの後部扉のロックのパーツ(かんぬき錠の箱金具)との干渉を避けるために確保したスペースである。このスペースZについては、道板60の前縁に切欠きを設け、この切欠きで代替することもできる。この場合、スペースZを確保するために道板60を分割する必要はない。 The space Z between the road boards 60b and 60c is designed to prevent interference with the lock parts (box metal fittings of the bolt lock) of the rear door of the loading platform L when the loading platform 20 rises to the floor level of the loading platform L. This is a space reserved to avoid this. This space Z can also be replaced by a notch provided at the front edge of the road board 60. In this case, there is no need to divide the road board 60 in order to secure the space Z.

道板60a,60cの間のスペースは、荷受台20が下降した際にリフトアーム42との干渉を避けるためのスペースである。このスペースZには、上記道板70が配置され、荷受台20が上昇し荷台Lの床面の高さにある状態では道板70で塞がれる。 The space between the road boards 60a and 60c is a space for avoiding interference with the lift arm 42 when the loading platform 20 is lowered. The above-mentioned road board 70 is arranged in this space Z, and is blocked by the road board 70 when the loading platform 20 is raised and is at the level of the floor surface of the loading platform L.

道板70は、ジョイントプレート71を介してフラップ26の前部に連結されている。道板70とフラップ26は、ジョイントプレート71で継ぎ合わされて一体の板状構造物を構成しており、回動軸27を中心にして一体に上下に回動する。道板70は、フラップ26と一体に自重で閉じる(水平に寝る)構成であり、荷受台20が地面付近にある状態ではリフトアーム42により押し上げられて起立する。それ以外のとき(例えば荷受面S1が荷台Lの床面SLの高さに位置するとき)は、水平に倒れて道板60と面一に連なった姿勢になる。 The road board 70 is connected to the front part of the flap 26 via a joint plate 71. The road board 70 and the flap 26 are joined together by a joint plate 71 to form an integral plate-like structure, and rotate up and down together around the rotation axis 27. The road board 70 is configured to close (lie horizontally) under its own weight together with the flap 26, and is pushed up by the lift arm 42 and stands up when the load receiving platform 20 is near the ground. At other times (for example, when the load receiving surface S1 is located at the height of the floor surface SL of the loading platform L), the load receiving surface S1 falls horizontally and becomes flush with the road board 60.

-荷役動作-
荷役動作は、荷受台20が展開状態であること、具体的には後端センサ(不図示)がオンでゲートセンサ(不図示)がオフであることを条件として実行される。この条件下で操作装置(不図示)が上げ操作されると、上げ操作信号に応じて制御装置から制御信号が出力され、リフトシリンダが伸長して荷受台20が上昇する。操作装置で下げ操作がされると、下げ操作信号に応じて制御装置から制御信号が出力され、リフトシリンダが収縮して荷受台20が下降する。
-Cargo handling operations-
The cargo handling operation is performed on the condition that the cargo receiving platform 20 is in the unfolded state, specifically, that the rear end sensor (not shown) is on and the gate sensor (not shown) is off. When the operating device (not shown) is operated to raise under this condition, a control signal is output from the control device in response to the raising operation signal, the lift cylinder is extended, and the cargo receiving platform 20 is raised. When a lowering operation is performed using the operating device, a control signal is output from the control device in response to the lowering operation signal, the lift cylinder contracts, and the loading platform 20 is lowered.

荷受台20は、リフトアーム42に連結されているため、リフトアーム42の回動支点を中心とする円弧軌道Oを描いて昇降する。荷台Lの後端には段差部STがあるため、荷受台20が荷台Lの床面SLの高さまで上昇しても、荷受台20の荷受面S1と荷台Lの床面SLの間には、段差部STの前後長かそれよりも広い隙間が空く(図4)。しかし、上記の通り薄手の板材で構成した道板60の主部63が、荷受台20の上昇過程で荷台Lの段差部STの後端Xをかわして段差部STの上側の領域に入り込み、荷台Lの床面SLと荷受台20の荷受面S1との間の隙間を狭める(図4)。もちろん、荷台Lの床面SLの高さから荷受台20が下降する際も、道板60の主部63が荷台Lの構造物に干渉することはない。 Since the loading platform 20 is connected to the lift arm 42, it moves up and down while drawing an arcuate trajectory O centered on the pivot point of the lift arm 42. Since there is a step ST at the rear end of the loading platform L, even if the loading platform 20 rises to the height of the floor surface SL of the loading platform L, there is no space between the loading surface S1 of the loading platform 20 and the floor surface SL of the loading platform L. , a gap is created that is equal to or wider than the length of the stepped portion ST (FIG. 4). However, as mentioned above, the main part 63 of the road board 60 made of a thin plate material passes over the rear end X of the stepped portion ST of the loading platform L and enters the area above the stepped portion ST during the rising process of the loading platform 20. The gap between the floor surface SL of the loading platform L and the loading surface S1 of the loading platform 20 is narrowed (FIG. 4). Of course, even when the loading platform 20 is lowered from the height of the floor surface SL of the loading platform L, the main portion 63 of the road board 60 does not interfere with the structure of the loading platform L.

-効果-
(1)本実施形態において、荷受台20に装着した道板60が、荷受板23の裏面S2からオフセットして折れ曲がり、荷受面S1に連なる薄板状の主部63を荷受台20の前方に突き出させている。このように薄板を折り曲げて道板60を製作することで、荷受台20の昇降に伴って道板60が描く軌道の内径を拡大し、荷台Lの後端Xをかわして道板60の主部63を段差部STの上側の領域に出入りさせることができる。
-effect-
(1) In the present embodiment, the road board 60 attached to the loading platform 20 is bent offset from the back surface S2 of the loading platform 23, and the thin plate-shaped main portion 63 connected to the loading surface S1 is projected forward of the loading platform 20. I'm letting you do it. By manufacturing the road board 60 by bending a thin plate in this way, the inner diameter of the track drawn by the road board 60 is expanded as the loading platform 20 moves up and down, and the main part of the road board 60 is bent to avoid the rear end X of the loading platform L. The portion 63 can be moved into and out of the area above the stepped portion ST.

これにより、荷台Lの後端の段差部STの存在によって荷台Lの床面SLと荷受台20の荷受面S1との間に空く隙間の大部分を、道板60の主部63で塞ぐことができる。こうして道板60で段差部STにより広く空く隙間が狭められることにより、台車を用いた荷役作業を効率的に行うことができる。 This allows the main portion 63 of the road board 60 to close most of the gap between the floor surface SL of the loading platform L and the load receiving surface S1 of the loading platform 20 due to the presence of the step ST at the rear end of the loading platform L. I can do it. In this way, the wide gap formed by the step ST in the road board 60 is narrowed, so that cargo handling operations using the trolley can be performed efficiently.

また、立上部62が、荷受板23の荷台Lとの対向端面S3に沿って荷受面S1の高さまで立ち上がる形状を有していることで、固定部61の高さから車両前方側に延出する構成と比較して、荷受台20の昇降動作に伴う荷台Lの端面SRとの干渉を回避しつつ主部63を隙間L1内に侵入させることができる。 In addition, since the rising portion 62 has a shape that rises up to the height of the load receiving surface S1 along the end surface S3 of the load receiving plate 23 facing the loading platform L, it extends from the height of the fixed portion 61 toward the front side of the vehicle. Compared to the configuration, the main portion 63 can enter the gap L1 while avoiding interference with the end surface SR of the loading platform L due to the vertical movement of the loading platform 20.

また、道板60は、荷受台20に装着された非可動部材であるため、荷台に設けられた反転式の従来の道板と異なり手作業で開閉する必要がなく、作業者の負担を軽減することができる。使用後に道板を仕舞い忘れることによる不具合も生じない。道板60に複雑な可動機構がなく、道板60の製作が容易であることも大きなメリットである。 In addition, since the road board 60 is a non-movable member attached to the loading platform 20, there is no need to manually open and close it, unlike conventional reversible road boards installed on the loading platform, reducing the burden on the operator. can do. There are no problems caused by forgetting to put the board away after use. Another great advantage is that the road board 60 does not have a complicated movable mechanism, and the road board 60 is easy to manufacture.

なお、荷受台昇降装置1は、荷台が段差部STを持たない車両に架装しても構わない。この場合、必要に応じて道板60の主部63の前後長を調整し、荷台Lの床面SLと荷受面S1との間の隙間を道板60の主部63で埋めて台車作業等を円滑化することができる。 Note that the loading platform elevating device 1 may be mounted on a vehicle whose loading platform does not have a stepped portion ST. In this case, the front and back length of the main part 63 of the road board 60 is adjusted as necessary, and the gap between the floor surface SL of the loading platform L and the cargo receiving surface S1 is filled with the main part 63 of the road board 60, so that the cart work etc. can be facilitated.

(2)道板60は、ボルト68及びナット69で基端側荷受台21に固定される構成であるため脱着が容易である。そのため、例えば荷台の後端に段差がなく道板60が必要ない車両に荷受台昇降装置1を架装する場合には、道板60を容易に取り外すことができ、荷受台昇降装置1を架装する車両に応じて荷受台昇降装置1の形態を柔軟に変更することができる。 (2) Since the road board 60 is configured to be fixed to the proximal loading platform 21 with bolts 68 and nuts 69, it is easy to attach and detach. Therefore, for example, when mounting the cargo platform lifting device 1 on a vehicle that has no step at the rear end of the cargo platform and does not require the road plate 60, the road board 60 can be easily removed and the cargo platform lifting device 1 can be mounted on the vehicle. The configuration of the cargo platform lifting device 1 can be flexibly changed depending on the vehicle in which it is installed.

このとき、道板60を基端側荷受台21に単にボルト締結するだけなら、道板60をフラットに構成して荷受面S1にボルトで留めたりすることもできる。しかし、荷受面S1に道板60をボルトで留める場合には、道板60やボルトの頭部が荷受面S1から出っ張り、必要のない段差が生じてしまうが、本実施形態ではこれらの段差の発生を防止できる。 At this time, if the road board 60 is simply bolted to the proximal cargo receiving platform 21, the road board 60 may be configured flat and fastened to the cargo receiving surface S1 with bolts. However, when the road board 60 is fastened to the load receiving surface S1 with bolts, the road board 60 and the heads of the bolts protrude from the load receiving surface S1, creating unnecessary steps. However, in this embodiment, these steps are removed. Occurrence can be prevented.

また、本実施形態によれば、ボルト68を通すスリット23bが下向き(本例では鉛直下向き)に開口しているので、左右に隣接するボルト68の間隔から雨水等を効率的に排出することができる。特に、本実施形態に係る荷受台は、荷物の積み卸しに用いるときだけでなく、荷台Lの下方に収納されているときも上記スリット23bが鉛直下向きに開口した姿勢となる点でも好ましい。また、空洞23a及びスリット23bが直線状に延びて荷受板23の左右に開口しているので、狭隘な空洞23aに対するボルト68の頭部又はナット69の出し入れが容易であり、この点も道板60の脱着作業の容易化に貢献する。 Further, according to the present embodiment, since the slit 23b through which the bolt 68 is passed is opened downward (vertically downward in this example), rainwater etc. can be efficiently drained from the intervals between the bolts 68 adjacent to each other on the left and right. can. In particular, the loading platform according to this embodiment is preferable not only when used for loading and unloading cargo, but also when stored below the loading platform L, in that the slit 23b is opened vertically downward. In addition, since the cavity 23a and the slit 23b extend linearly and open on the left and right sides of the cargo receiving plate 23, it is easy to insert and remove the head of the bolt 68 or the nut 69 from the narrow cavity 23a. Contributes to facilitating the work of attaching and detaching the 60.

(4)荷受板23の裏面S2には、スチフナ24が取り付けられており、荷受台20はスチフナ24で接地するため、荷受台20の接地時にはスチフナ24によって地面と荷受板23との間にスペースが確保される。 (4) A stiffener 24 is attached to the back surface S2 of the cargo receiving plate 23, and since the cargo receiving board 20 is grounded by the stiffener 24, there is a space between the ground and the cargo receiving plate 23 due to the stiffener 24 when the cargo receiving board 20 is grounded. is ensured.

そこで、荷受台20の荷受板23の裏面S2に道板60をボルト締結する構成を採用されている。この場合、ボルト68又はナット69が荷受板23の裏面S2から突出するが、荷受台20が接地した状態でもスチフナ24によって地面と荷受板23の間にスペースが確保されるため、ボルト68又はナット69が地面に干渉することがない。 Therefore, a configuration is adopted in which the road board 60 is bolted to the back surface S2 of the cargo receiving plate 23 of the cargo receiving platform 20. In this case, the bolt 68 or nut 69 protrudes from the back surface S2 of the load receiving plate 23, but even when the load receiving plate 20 is in contact with the ground, the stiffener 24 secures a space between the ground and the load receiving plate 23, so the bolt 68 or the nut 69 protrudes from the back surface S2 of the load receiving plate 23. 69 does not interfere with the ground.

(5)道板60は板材の曲げ加工で形成することができるため、道板60の材料は荷受台20の材料に制限されない。また、道板60は薄板であって体積が小さいため、比重の観点でも様々な材料が許容される。そのため、道板60の材料は広い選択肢から選択することができる。本実施形態の場合、荷受台20がアルミ製であるところ、道板60の材料にはステンレスが選択されている。これにより、道板60を高強度で耐食性に優れたパーツとすることができる。 (5) Since the road board 60 can be formed by bending a plate material, the material of the road board 60 is not limited to the material of the cargo receiving platform 20. Furthermore, since the road board 60 is a thin plate and has a small volume, various materials are acceptable in terms of specific gravity. Therefore, the material for the road board 60 can be selected from a wide range of options. In the case of this embodiment, the loading platform 20 is made of aluminum, but stainless steel is selected as the material for the road board 60. Thereby, the road board 60 can be made into a part with high strength and excellent corrosion resistance.

-変形例-
本発明は、荷受台の折り畳み構造や格納形態によらず、アームの回動運動により荷受台を昇降させる荷受台昇降装置に適用することができる。例えば、上記実施形態では、先端側荷受台22が1枚の(1箇所で荷受台20が折れる)構造を例示したが、先端側荷受台22を前後複数枚の荷受台で構成し、荷受台20が2カ所以上で折れる構造としても良い。このような荷受台を採用した荷受台昇降装置にも以上で説明した道板60,70は適用可能である。また、荷受台を折り畳まなくてもスライドシリンダ33で引き込むだけで車枠Fの下部に格納できる場合には、荷受台20の折り畳み機構自体を省略できる。また荷受台昇降装置には、車枠の下側に荷受台を格納するものの他、荷受台を車両の荷台の壁面(例えば後面)に沿って起立させた格納姿勢が選択できるものも存在する。このような2通りの格納姿勢を採用する荷受台昇降装置にも本発明は適用可能である。また車枠の下側に荷受台を格納する機構を持たず、荷受台を車両の荷台の壁面に沿って起立させて格納する荷受台昇降装置にも本発明は適用可能である。
-Modified example-
INDUSTRIAL APPLICATION This invention is applicable to the loading platform lifting device which raises and lowers a loading platform by the rotational movement of an arm, irrespective of the folding structure and storage form of a loading platform. For example, in the above embodiment, the structure in which the tip side loading platform 22 is one piece (loading tray 20 is folded at one point) is illustrated, but the tip side loading tray 22 is configured with a plurality of loading trays in the front and rear, and 20 may be bent at two or more places. The road boards 60 and 70 described above can also be applied to a cargo platform lifting device that employs such a cargo platform. Further, if the loading platform can be stored in the lower part of the vehicle frame F by simply pulling it in with the slide cylinder 33 without folding the loading platform, the folding mechanism of the loading platform 20 itself can be omitted. In addition to the loading platform lifting device that stores the loading platform under the vehicle frame, there are also devices that allow you to select a storage position in which the loading platform is erected along the wall surface (for example, the rear surface) of the loading platform of the vehicle. The present invention is also applicable to a loading platform lifting/lowering device that adopts such two storage postures. Further, the present invention is also applicable to a loading platform elevating device that does not have a mechanism for storing the loading platform under the vehicle frame, but stores the loading platform in an upright manner along the wall surface of the loading platform of the vehicle.

また、道板60の形状に関しても、図4のように固定部61と主部63の間に立上部62を有する形状に限らず、基端側荷受台21の前端面(対向端面S3)にボルトで留める(立上部62が固定部61を兼用する)形状、つまり左右から見てL字型の形状としても良い。 Further, the shape of the road board 60 is not limited to the shape having the raised part 62 between the fixed part 61 and the main part 63 as shown in FIG. It may be fastened with bolts (the upright part 62 also serves as the fixing part 61), that is, it may have an L-shape when viewed from the left and right.

1…荷受台昇降装置、20…荷受台、23a…空洞、23b…スリット、23…荷受板、24…スチフナ、42…リフトアーム、60…道板、61…固定部、62…立上部、63…主部、68…ボルト、69…ナット、FL…床板、L…荷台、O…円弧軌道、S1…荷受面、S2…裏面、S3…対向端面、SL…床面、ST…段差部 DESCRIPTION OF SYMBOLS 1... Load receiving platform lifting device, 20... Load receiving platform, 23a... Cavity, 23b... Slit, 23... Load receiving plate, 24... Stiffener, 42... Lift arm, 60... Road board, 61... Fixed part, 62... Standing part, 63 ...Main part, 68...Bolt, 69...Nut, FL...Floor plate, L...Cargo platform, O...Circular track, S1...Load receiving surface, S2...Back surface, S3...Opposite end surface, SL...Floor surface, ST...Step part

Claims (6)

荷台の床板の端に床面より下がった段差部を持つ車両に架装される荷受台昇降装置において、
前記車両の荷台に対して上下に回動するリフトアームと、
前記リフトアームの先端に連結され、荷受板の裏面に取り付けられて接地するスチフナを有する荷受台と、
前記荷受台の前記荷台との対向部に設けられた非可動構造の道板とを備え、
前記道板は、
前記荷受板の裏面に着脱可能に固定される固定部と、
前記固定部から折れ曲がり、前記荷受板の前記荷台との対向端面に沿って立ち上がる立上部と、
前記立上部から前記荷台に向かって折れ曲がり、前記荷受板の荷受面に連なって前記荷台と前記荷受板との間に位置する主部と
を含んで構成されており、
前記荷受台が円弧軌道を描いて前記荷台の床面の高さまで上昇した状態で、前記主部が、前記荷台の段差部の上側に重なり、前記荷台の床面と前記荷受台との間に位置するように構成されており、
前記道板は、前記リフトアームの回動に伴って前記荷受台と一体に円弧軌道を描いて上昇し、前記荷台の端面を超えて前記荷台の床面に接近するように構成されている
ことを特徴とする荷受台昇降装置。
In a loading platform lifting device mounted on a vehicle that has a step lower than the floor surface at the end of the loading platform floor plate,
a lift arm that rotates up and down with respect to the loading platform of the vehicle;
a load receiving plate connected to the tip of the lift arm and having a stiffener attached to the back surface of the load receiving plate and grounded;
a road board of a non-movable structure provided at a portion of the loading platform facing the loading platform;
The road board is
a fixing part that is removably fixed to the back surface of the load receiving plate;
an upright portion bent from the fixed portion and rising along an end surface of the load receiving plate facing the loading platform;
The main portion is bent from the raised portion toward the loading platform, and is connected to the loading surface of the loading plate and is located between the loading platform and the loading plate,
In a state in which the loading platform draws an arcuate trajectory and rises to the height of the floor surface of the loading platform, the main portion overlaps the upper side of the stepped portion of the loading platform, and there is a space between the floor surface of the loading platform and the loading platform. It is configured to be located
The road board is configured to rise integrally with the loading platform in an arcuate trajectory as the lift arm rotates, and to approach the floor surface of the loading platform beyond the end surface of the loading platform. A loading platform lifting device featuring:
請求項1の荷受台昇降装置において、
前記立上部は、前記荷台に向かう方向に傾斜して立ち上がる前記荷受板の前記対向端面に沿っていることを特徴とする荷受台昇降装置。
In the loading platform elevating device according to claim 1,
The loading platform elevating and lowering device is characterized in that the rising portion is along the opposing end surface of the loading platform that stands up with an inclination toward the loading platform.
請求項1又は2の荷受台昇降装置において、
前記道板は、ボルト及びナットで前記荷受台に固定されており、
前記荷受板は、左右に延びる空洞と、前記裏面に前記空洞に沿って設けられて前記空洞を下向きに開口させるスリットとを備えており、
前記ボルトの頭部又はナットが前記空洞に収容され、前記ボルトの軸が前記スリットを通り上下に延びている
ことを特徴とする荷受台昇降装置。
The loading platform lifting device according to claim 1 or 2,
The road board is fixed to the loading platform with bolts and nuts,
The load receiving plate includes a cavity extending left and right, and a slit provided on the back surface along the cavity to open the cavity downward;
A loading platform lifting device characterized in that a head or a nut of the bolt is housed in the cavity, and a shaft of the bolt passes through the slit and extends up and down.
請求項3の荷受台昇降装置において、
前記荷受板の裏面からの前記ボルト又は前記ナットの突き出し量は、前記スチフナの上下の厚みよりも小さい
ことを特徴とする荷受台昇降装置。
In the loading platform lifting device according to claim 3,
The load receiving platform elevating device characterized in that the amount of protrusion of the bolt or the nut from the back surface of the load receiving plate is smaller than the upper and lower thicknesses of the stiffener.
請求項1の荷受台昇降装置において、
前記道板は、前記荷受台とは異なる材料で形成されていることを特徴とする荷受台昇降装置。
In the loading platform elevating device according to claim 1,
The load receiving platform elevating device is characterized in that the road board is formed of a material different from that of the load receiving platform.
請求項5の荷受台昇降装置において、
前記荷受台はアルミ製、前記道板はステンレス製であることを特徴とする荷受台昇降装置。
In the cargo platform elevating device according to claim 5,
A loading platform lifting device characterized in that the loading platform is made of aluminum and the road board is made of stainless steel.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003137016A (en) 2001-11-05 2003-05-14 Eishin Body Kogyo:Kk Tail gate lift of truck
JP2005145193A (en) 2003-11-13 2005-06-09 Kyokuto Kaihatsu Kogyo Co Ltd Load receiving platform lifting device
JP5714309B2 (en) 2010-11-24 2015-05-07 極東開発工業株式会社 Loading platform lifting device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4579503A (en) * 1983-11-02 1986-04-01 Leyman Manufacturing Corp. Sideloader elevator platform
JP3392033B2 (en) * 1997-12-25 2003-03-31 極東開発工業株式会社 Loading platform lifting device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003137016A (en) 2001-11-05 2003-05-14 Eishin Body Kogyo:Kk Tail gate lift of truck
JP2005145193A (en) 2003-11-13 2005-06-09 Kyokuto Kaihatsu Kogyo Co Ltd Load receiving platform lifting device
JP5714309B2 (en) 2010-11-24 2015-05-07 極東開発工業株式会社 Loading platform lifting device

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