JP2009073457A

JP2009073457A - Aluminum alloy slope for welfare vehicle

Info

Publication number: JP2009073457A
Application number: JP2007274428A
Authority: JP
Inventors: Yoshikazu Inohara; 良和猪原
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-21
Filing date: 2007-09-21
Publication date: 2009-04-09

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor member for a slope with increased strength in a longitudinal (extending) direction of the slope. <P>SOLUTION: Aluminum extruded material of which the cross section can be fitted is used, and the floor member jointed by fitting is made in one piece of panel, providing large rigidity to bent stress in an arranged direction, and reducing the thickness of the cross section and height of the floor member. With this structure, a lightweight rail with a running off prevention function of a wheelchair is sufficient, replacing a "thick" reinforcement rail located at both ends at the width of the slope. Therefore, it is possible to reduce weight of the slope device, and cost accordingly. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

Detailed Description of the Invention

本発明は、福祉車両後部から地上に下ろして車椅子の乗降を容易にするスロープ装置の構造に関する発明である。 The present invention relates to a structure of a slope device that makes it easy to get on and off a wheelchair by lowering it from the rear of a welfare vehicle to the ground.

初期のスロープ装置では、アルミ板を曲げ加工した構造の物が主流であった。（参考文献１参照）
その後、中空アルミ押出型材を使ったスロープ装置が提案されている。その提案は、隣り合う床部材の端を重ね合わせる構造にする（係合させる）事によって、鉛直方向の荷重を隣の床部材にも分担させるという特徴を持っているものが提出されている。（参考文献２参照）もともと中空型材を使うことは、同じ断面積の板材より断面性能を向上させる目的に効果があるが、それと係合の方案が相まって、初期のアルミ板の曲げ加工したスロープ装置に比べて、軽量化に成功している。軽くなれば、スロープの収納・展開の取扱いが簡単なるし、また素材の使用量減に比例して製品が安価になるという効果を得ている。In the initial slope device, the structure with a bent aluminum plate was the mainstream. (See Reference 1)
Thereafter, a slope device using a hollow aluminum extrusion mold material has been proposed. The proposal has been proposed that has a feature of sharing the load in the vertical direction with the adjacent floor member by superimposing (engaging) the ends of the adjacent floor members. (Refer to Reference 2) Originally, the use of a hollow type material is effective in improving the cross-sectional performance compared with a plate material having the same cross-sectional area, but in combination with the engagement method, the slope device in which the initial aluminum plate was bent Compared to, it has succeeded in reducing the weight. If it is lighter, it will be easier to store and unfold the slope, and the product will become cheaper in proportion to the reduced amount of material used.

Reference 1

特開平１０−８６７３９号公報JP-A-10-86739

Reference 2

特開２００２−８７１６４号公報JP 2002-87164 A

上記の中空アルミ押出型材を使ったスロープでは隣り合う床部材の端に段差を付けて重なる部分を持たせることで、鉛直下方向の荷重に対して荷重を分担したり、撓み量を軽減するには有効ではあったが、それはスロープ巾方向の強度に限定されるものである。
一方、スロープ長さ（延伸）方向は、スロープ巾方向より支点間距離も長く、より高い断面性能が求められる。長さ方向の剛性も併せて向上させることができれば、スロープ装置の強度バランスは理想的で、より軽量化も図れると考えられる。前述（参考文献２）の発明にはこの点が課題であった。本発明ではその課題であるスロープ長さ方向の強度アップも併せて解決できるスロープ装置の発明である。In the slope using the above-mentioned hollow aluminum extrusion mold material, by adding a step to the end of the adjacent floor member and having an overlapping part, the load is shared with respect to the load in the vertical downward direction, or the amount of bending is reduced. Was effective, but it is limited to the strength in the slope width direction.
On the other hand, in the slope length (stretching) direction, the distance between supporting points is longer than that in the slope width direction, and higher cross-sectional performance is required. If the rigidity in the length direction can also be improved, the strength balance of the slope device is ideal, and it is considered that the weight can be further reduced. This point was a problem in the above-described invention (reference 2). The present invention is an invention of a slope device that can solve the problem of increasing the strength in the direction of the slope length.

本発明は、床部材のアルミ押出断面に勘合の機能を持たせ、勘合した床部材を一体化したパネルとみなせる構造としている事を特徴としている。
これにより、スロープ長さ方向の曲げ応力に対して、飛躍的に剛性を向上させることを可能にするものである。The present invention is characterized in that the aluminum extrusion cross section of the floor member has a fitting function, and the fitted floor member can be regarded as an integrated panel.
This makes it possible to dramatically improve the rigidity against bending stress in the slope length direction.

パネルとしての剛性が向上した事によって、従来のスロープの床部材厚を更により薄くかつ軽量化することが可能となった。その結果、スロープの展開・収納に於いて操作が更に容易となり、また一層のコスト低減が可能となった。
勘合することで、各部材は拘束される事となり、スロープ巾方向の中央部付近において発生していた撓みに依る床部材の高さのズレ（段差）も、解消することが出来た。軽くて剛性のある床パネルは、使う人に安心感を与えるスロープ装置となっている。By improving the rigidity as a panel, it has become possible to make the floor member thickness of the conventional slope even thinner and lighter. As a result, the operation of the slope can be further facilitated and stored, and the cost can be further reduced.
By fitting, each member is restrained, and the deviation (step) in the height of the floor member due to the bending generated near the center in the slope width direction can be eliminated. The light and rigid floor panel is a slope device that gives the user a sense of security.

アルミニウム合金が勘合に適する理由は、弾性係数が６８ｋＮ／ｍｍ^２と鉄の１／３で、弾性限度内での変形量は鉄より３倍も大きいことに依る。アルミニウウム合金の勘合は日用品、電気製品など一般に広く使われている。
また、アルミニウム合金押出型材は、熱間押出で作られるが、押出方向に垂直な断面形状は比較的自由な形状を選ぶことが出来る。勘合断面はこれらの特長を充分考慮して考案した。
床部材の勘合の実施例としては、一般的に「スナップ勘合」と呼ばれている断面形状が望ましい。（図２）これは、勘合して連結させた状態で曲げが作用した際に、上面側の係合と下面側の係合の係合状態が安定的に維持されるように支持されるので、連結したパネル全体の曲げ剛性を高める事が出来、今回のような用途に最適である。
また、勘合により床部材間の連結にはビス、ボルトなどを用いる必要も無くなる。The reason why the aluminum alloy is suitable for fitting is that the elastic modulus is 68 kN / mm ² and 1/3 of iron, and the deformation amount within the elastic limit is three times larger than iron. The fitting of aluminum alloy is widely used in daily goods and electrical products.
In addition, the aluminum alloy extrusion mold is made by hot extrusion, but the cross-sectional shape perpendicular to the extrusion direction can be selected to be relatively free. The fitting cross section was devised taking into account these features.
As an example of fitting of the floor member, a cross-sectional shape generally called “snap fitting” is desirable. (FIG. 2) This is supported so that the engagement state between the upper surface side engagement and the lower surface side engagement is stably maintained when bending acts in a state of being fitted and connected. It is possible to increase the bending rigidity of the whole connected panel, and it is most suitable for the use like this time.
In addition, it is not necessary to use screws, bolts or the like for connection between floor members due to the fitting.

スロープ巾方向の両端には、車いすの脱輪を防止する目的の車輪誘導レールを配置する（図３）。またこのレールは、パネルの両端の切断面を覆い隠す用途も兼ねている。 At both ends in the slope width direction, wheel guide rails for the purpose of preventing wheelchairs from being removed are arranged (FIG. 3). The rail also serves to cover the cut surfaces at both ends of the panel.

床部材の押し出し方向の断面には、車いすの車輪が無回転で滑り落ちないように、三角形状の滑り止め凹凸形状を付けた（図４）。 The cross section of the floor member in the push-out direction was provided with a triangular anti-slip uneven shape so that the wheel of the wheelchair did not rotate and slip off (FIG. 4).

スロープの概略図Schematic diagram of the slope スナップ勘合を示したアルミ押出型材の断面図Sectional view of an aluminum extrusion mold showing a snap fit アルミ押出型材の勘合組合せを示したスロープ長手方向断面図Slope longitudinal sectional view showing fitting combination of aluminum extrusion mold materials 車輪誘導レールを示した断面図Sectional view showing wheel guide rail

Explanation of symbols

１．床部材（＝アルミ押出型１ｐｃ）
２．車輪誘導レール
３．三角形状の滑り止め凹凸1. Floor material (= aluminum extrusion mold 1pc)
2. 2. Wheel guide rail Triangular anti-slip irregularities

Claims

There are types of welfare vehicles that have a slope at the rear of the vehicle so that people can get on and off the wheelchair. The floor member of the slope is characterized by a structure using an aluminum extruded material having a cross-sectional shape that can be fitted for the purpose of improving the strength in the length (stretching) direction of the slope.
The floor members connected by fitting are born to function as an integrated panel, and exhibit great rigidity against bending stress in the arranged direction.