JP2018102444A - Fall prevention device - Google Patents

Fall prevention device Download PDF

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JP2018102444A
JP2018102444A JP2016250204A JP2016250204A JP2018102444A JP 2018102444 A JP2018102444 A JP 2018102444A JP 2016250204 A JP2016250204 A JP 2016250204A JP 2016250204 A JP2016250204 A JP 2016250204A JP 2018102444 A JP2018102444 A JP 2018102444A
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air tube
air
charge
core material
vehicle
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JP6789098B2 (en
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庄司 柚木
Shoji Yugi
庄司 柚木
義和 松谷
Yoshikazu Matsutani
義和 松谷
悟志 林田
Satoshi Hayashida
悟志 林田
幸輝 大村
Yukiteru Omura
幸輝 大村
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West Japan Railway Technos Corp
West Japan Railway Co
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West Japan Railway Technos Corp
West Japan Railway Co
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Abstract

PROBLEM TO BE SOLVED: To provide a fall prevention device capable of preventing a fall of a human or a thing from a gap between a roof inspection scaffold and a vehicle roof that hardly causes damage to the vehicle.SOLUTION: A fall prevention device 1 includes: an air tube 4 provided along a vehicle side end part 21 of a roof inspection scaffold 2; a core material 5 provided inside the air tube 4; and an air charging/discharging device 6 for charging the air tube 4 with air and discharging the air from the air tube 4. The air tube 4 inflates in a radial direction and closes a gap G when charged with air, and contracts in a radial direction to generate the gap G when the air is discharged by the air charging/discharging device 6. The core material 5 reduces the gap G when the air in the air tube 4 is released without depending on the air charging/discharging device 6. Thereby, a fall of a human or a thing can be prevented not only when the air tube 4 is charged with air, but also when the air in the air tube is released.SELECTED DRAWING: Figure 1

Description

本発明は、鉄道車両の検修を行う場所における屋根上点検足場と車両屋根との隙間からの人又は物の落下を防止するための落下防止装置に関する。   The present invention relates to a fall prevention device for preventing a person or an object from falling from a gap between a roof inspection scaffold and a vehicle roof in a place where a railway vehicle is inspected and repaired.

図５に示すように、鉄道車両の検修（検査・修繕）を行う場所には、車両３（鉄道車両）の屋根上を点検するための屋根上点検足場２が設けられている。作業員は、屋根上点検足場２から車両屋根３１の上に乗り移って検修作業を行う。屋根上点検足場２は、車両３との接触を避けるために建築限界外に設けられる。建築限界とは、車両限界の外側に必要最小限の余裕空間を加えた、建築物に対する限界である（非特許文献１の番号１２１０２）。車両限界とは、車両が平たん直線軌道上に停止しているとき、車両のどの部分も超えてはならない車両に対する限界である（非特許文献１の番号１２１０１）。屋根上点検足場２は、建築限界を遵守するため、車両屋根３１との間に隙間Ｇがある。この隙間Ｇの大きさは、車両３によって異なり、隙間Ｇを最適化することは困難である。このため、屋根上点検足場２と車両屋根３１との隙間Ｇから作業員が落下するおそれがある。また、この隙間Ｇから工具等の物が落下して、下にいる作業員に当たるおそれがある。   As shown in FIG. 5, a roof inspection scaffold 2 for inspecting the roof of the vehicle 3 (railway vehicle) is provided at a place where the inspection (inspection / repair) of the railway vehicle is performed. The worker transfers from the roof inspection scaffold 2 onto the vehicle roof 31 to perform the repair work. The roof inspection scaffold 2 is provided outside the building limits in order to avoid contact with the vehicle 3. The building limit is a limit for a building in which a necessary minimum margin space is added outside the vehicle limit (No. 12102 of Non-Patent Document 1). The vehicle limit is a limit for a vehicle that should not exceed any part of the vehicle when the vehicle is stopped on a flat straight track (number 12101 of Non-Patent Document 1). The roof inspection scaffold 2 has a gap G with the vehicle roof 31 in order to comply with the building limits. The size of the gap G differs depending on the vehicle 3, and it is difficult to optimize the gap G. For this reason, an operator may fall from the gap G between the roof inspection scaffold 2 and the vehicle roof 31. Further, there is a possibility that an object such as a tool falls from the gap G and hits a worker underneath.

このような隙間を塞ぐための車両用点検作業装置が知られている（特許文献１参照）。この装置では、屋根上点検足場は、可動式の足場板（通路形成体及び転落防止体）を有し、その足場板で車両屋根との隙間を塞ぐ。しかしながら、このような装置では、足場板の収納を忘れ、車両が動いた時に足場板が車両屋根や屋根上機器に当たって損傷するおそれがある。   A vehicle inspection work device for closing such a gap is known (see Patent Document 1). In this apparatus, the roof inspection scaffold has a movable scaffold plate (passage formation body and fall prevention body), and the scaffold plate closes the gap with the vehicle roof. However, in such a device, the storage of the scaffolding plate may be forgotten, and when the vehicle moves, the scaffolding plate may hit the vehicle roof or equipment on the roof and be damaged.

特開平６−３２９００３号公報JP-A-6-329003

ＪＩＳ Ｅ ４００１：２０１１「鉄道車両−用語」JIS E 4001: 2011 “Railway Vehicles—Terminology”

本発明は、上記問題を解決するものであり、屋根上点検足場と車両屋根との隙間からの人又は物の落下を防止するとともに、車両を損傷し難い落下防止装置を提供することを目的とする。   The present invention solves the above-described problem, and an object thereof is to provide a fall prevention device that prevents a person or an object from falling from a gap between a roof inspection scaffold and a vehicle roof, and that hardly damages the vehicle. To do.

本発明の落下防止装置は、鉄道車両の検修を行う場所における屋根上点検足場と車両屋根との隙間からの人又は物の落下を防止するためのものであって、屋根上点検足場の車両側端部に沿って設けられた長尺状のエアチューブと、前記エアチューブ内に設けられた長尺状の芯材と、前記エアチューブを充気及び排気するための充排気装置とを備え、前記エアチューブは、充気されたとき、径方向に膨張して前記隙間を塞ぎ、前記充排気装置によって排気されたとき、径方向に収縮して前記隙間を生じさせ、前記芯材は、前記充排気装置によらずに前記エアチューブ内の空気が抜けたとき、前記隙間を縮小することを特徴とする。   A fall prevention device of the present invention is for preventing a person or an object from falling from a gap between a roof inspection scaffold and a vehicle roof in a place where a railway vehicle is inspected, and is a vehicle for a roof inspection scaffold. A long air tube provided along the side end portion, a long core material provided in the air tube, and a charge / exhaust device for charging and exhausting the air tube When the air tube is filled, the air tube expands in the radial direction to close the gap, and when exhausted by the charge / exhaust device, the air tube contracts in the radial direction to generate the gap. The air gap is reduced when the air in the air tube escapes regardless of the charge / exhaust device.

この落下防止装置において、前記エアチューブは、膨張したときに円筒形であり、前記充排気装置によって車両から遠い側から充排気され、前記芯材は、一方向に長い断面形状を有し、前記エアチューブが前記充排気装置によって充気されるとき、断面視で、前記芯材は、膨張した前記エアチューブ内で倒れ、前記エアチューブが前記充排気装置によって排気されるとき、前記芯材は、前記エアチューブ内で起立し、前記充排気装置によらずに前記エアチューブ内の空気が抜けるとき、前記芯材は、前記エアチューブ内で倒れたままであることが好ましい。   In this fall prevention device, the air tube has a cylindrical shape when expanded, and is charged / exhausted from the side far from the vehicle by the charge / exhaust device, and the core member has a long cross-sectional shape in one direction, When the air tube is charged by the charge / exhaust device, in cross-sectional view, the core material falls down in the expanded air tube, and when the air tube is exhausted by the charge / exhaust device, the core material is When the air tube stands up and the air in the air tube escapes without using the charge / exhaust device, the core material preferably falls down in the air tube.

この落下防止装置において、前記芯材は、楕円の断面形状を有し、前記エアチューブが前記充排気装置によって充気されたとき、前記芯材は、前記楕円の長径方向が略水平になり、前記エアチューブが前記充排気装置によって排気されたとき、前記芯材は、前記長径方向が略鉛直になり、前記充排気装置によらずに前記エアチューブ内の空気が抜けたとき、前記芯材は、前記長径方向が略水平のままであることが好ましい。   In this fall prevention device, the core material has an elliptical cross-sectional shape, and when the air tube is filled with the charge / exhaust device, the core material becomes substantially horizontal in the major axis direction of the ellipse, When the air tube is exhausted by the charge / exhaust device, the core material becomes substantially vertical in the major axis direction, and when the air in the air tube escapes without using the charge / exhaust device, the core material It is preferable that the major axis direction remains substantially horizontal.

この落下防止装置において、前記エアチューブは、ゴム製であり、前記芯材は、発泡樹脂製であることが好ましい。   In this fall prevention device, it is preferable that the air tube is made of rubber, and the core material is made of foamed resin.

本発明の落下防止装置によれば、エアチューブは、充気されたとき、車両屋根との隙間を塞ぐので、人及び物の落下が防止される。エアチューブは、空気で膨張するものであるので、万一、車両と接触した状態で車両が動いても車両を損傷し難い。また、エアチューブは、充排気装置によって排気されたとき、車両屋根との隙間を生じさせるので、車両が動いても車両を損傷しない。さらに、充排気装置によらずにエアチューブ内の空気が抜けたとき、芯材が車両屋根との隙間を縮小するので、人及び大きな物の落下が防止される。   According to the fall prevention device of the present invention, when the air tube is filled, the air tube closes a gap with the vehicle roof, so that a person and an object are prevented from falling. Since the air tube expands with air, it is difficult to damage the vehicle even if the vehicle moves in contact with the vehicle. Moreover, since an air tube produces the clearance gap with a vehicle roof, when exhausted by the charging / exhausting apparatus, even if a vehicle moves, a vehicle is not damaged. Furthermore, when the air in the air tube escapes without using the charge / exhaust device, the core member reduces the gap with the vehicle roof, thereby preventing people and large objects from falling.

本発明の一実施形態に係る落下防止装置におけるエアチューブを充気したときの断面構成図。The cross-sectional block diagram when the air tube in the fall prevention apparatus which concerns on one Embodiment of this invention is filled. 同装置のエアチューブの斜視図。The perspective view of the air tube of the apparatus. 同装置におけるエアチューブを排気したときの断面構成図。The cross-sectional block diagram when the air tube in the same apparatus is exhausted. 同装置におけるエアチューブ内の空気が抜けたときの断面構成図。The cross-sectional block diagram when the air in the air tube in the same apparatus escapes. 鉄道車両の検修を行う場所における屋根上点検足場と車両屋根との隙間を示す図。The figure which shows the clearance gap between a roof inspection scaffold and a vehicle roof in the place which performs inspection of a rail vehicle.

本発明の一実施形態に係る落下防止装置を図１乃至図４を参照して説明する。図１に示すように、落下防止装置１は、鉄道車両３の検修を行う場所における屋根上点検足場２と車両屋根３１との隙間Ｇからの人又は物の落下を防止するためのものである。落下防止装置１は、エアチューブ４と、芯材５と、充排気装置６とを備える。図２に示すように、エアチューブ４は長尺状である。このエアチューブ４は、屋根上点検足場２の車両側端部２１に沿って設けられる（図１参照）。芯材５は、長尺状であり、エアチューブ４内に設けられる（図２参照）。充排気装置６は、エアチューブ４を充気（空気充填）及び排気（空気排出）するための装置である（図１参照）。   A fall prevention device according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the fall prevention device 1 is for preventing a person or an object from falling from a gap G between a roof inspection scaffold 2 and a vehicle roof 31 at a place where a railway vehicle 3 is inspected and repaired. is there. The fall prevention device 1 includes an air tube 4, a core material 5, and a charge / exhaust device 6. As shown in FIG. 2, the air tube 4 has a long shape. The air tube 4 is provided along the vehicle-side end 21 of the roof inspection scaffold 2 (see FIG. 1). The core material 5 has a long shape and is provided in the air tube 4 (see FIG. 2). The charge / exhaust device 6 is a device for charging (air filling) and exhausting (air discharging) the air tube 4 (see FIG. 1).

上記の各構成をさらに詳述する。エアチューブ４の材料は、例えば、ゴムであり、より具体的には一般的なゴムボートの素材である。エアチューブ４は、内部の空気圧に応じて、径方向に膨張・収縮する。エアチューブ４は、膨張したときに円筒形である（図２参照）。在来鉄道で用いる場合、エアチューブ４の直径は、膨張したとき、約３５０ｍｍである。エアチューブ４の長さは、例えば、約１７００ｍｍである。エアチューブ４は、充排気カプラ４１と、点検用充排気バルブ４２と、取付金具４３とを有する。充排気カプラ４１は、充排気装置６からの配管６１が接続される。エアチューブ４は、充排気装置６によって車両から遠い側から充排気される。点検用充排気バルブ４２は、エアチューブ４の点検時に充排気装置６を介さずに充排気するためのバルブである。取付金具４３は、エアチューブ４を所定位置に取り付けるための金具である。エアチューブ４は、取付金具４３を介して鋼材２２に取付けられる（図１参照）。鋼材２２は、屋根上点検足場２の車両側端部２１の下側に設けられている。   Each of the above configurations will be further described in detail. The material of the air tube 4 is, for example, rubber, and more specifically, a general rubber boat material. The air tube 4 expands and contracts in the radial direction according to the internal air pressure. The air tube 4 is cylindrical when expanded (see FIG. 2). When used in a conventional railway, the diameter of the air tube 4 is about 350 mm when expanded. The length of the air tube 4 is, for example, about 1700 mm. The air tube 4 includes a charge / exhaust coupler 41, an inspection charge / exhaust valve 42, and a mounting bracket 43. A pipe 61 from the charge / exhaust device 6 is connected to the charge / exhaust coupler 41. The air tube 4 is charged / exhausted from the side far from the vehicle by the charge / exhaust device 6. The inspection charge / exhaust valve 42 is a valve for charging / exhausting the air tube 4 without using the charge / exhaust device 6 at the time of inspection. The mounting bracket 43 is a bracket for mounting the air tube 4 at a predetermined position. The air tube 4 is attached to the steel material 22 via the attachment fitting 43 (see FIG. 1). The steel material 22 is provided below the vehicle-side end 21 of the roof inspection scaffold 2.

芯材５は、それ自身が軽量で、人の体重程度の荷重に耐えるものが望ましい。芯材５の材料は、例えば、発泡樹脂であり、より具体的には発泡スチロールである。芯材５は、一方向に長い断面形状を有し、例えば、楕円の断面形状を有する楕円柱形である。芯材５は、長手方向に複数に分割して構成してもよい。   It is desirable that the core material 5 is light by itself and can withstand a load about the weight of a person. The material of the core material 5 is, for example, a foamed resin, and more specifically, a polystyrene foam. The core material 5 has a long cross-sectional shape in one direction, for example, an elliptical column shape having an elliptical cross-sectional shape. The core material 5 may be divided into a plurality of parts in the longitudinal direction.

充排気装置６は、圧縮空気が外部から供給されるとともに、真空発生器（真空ポンプ）、３位置電磁弁、減圧弁、スピードコントローラ等を有する。圧縮空気は、エアチューブ４の充気に用いられる。真空発生器は、エアチューブ４を排気する。３位置電磁弁は、充気、停止、排気の動作を切り替える。減圧弁は、エアチューブ４の充気圧力を調整する。スピードコントローラは、エアチューブ４の排気時における真空引き量（真空圧）を調整する。   The charge / exhaust device 6 is supplied with compressed air from the outside and has a vacuum generator (vacuum pump), a three-position electromagnetic valve, a pressure reducing valve, a speed controller, and the like. The compressed air is used to fill the air tube 4. The vacuum generator exhausts the air tube 4. The 3-position solenoid valve switches between charging, stopping, and exhausting operations. The pressure reducing valve adjusts the charging pressure of the air tube 4. The speed controller adjusts the amount of vacuum (vacuum pressure) when the air tube 4 is exhausted.

上記のように構成された落下防止装置１の動作について説明する。作業員が屋根上点検足場２から車両屋根３１の上に乗り移って検修作業を行う場合、エアチューブ４が充気される。エアチューブ４は、充気されたとき、径方向に膨張して隙間Ｇを塞ぐ（図１参照）。エアチューブ４が充排気装置６によって充気されるとき、断面視で、芯材５は、膨張したエアチューブ４内で倒れる。矢印で示すように、エアチューブ４が、充排気装置６によって車両から遠い側から充気されるので、芯材５が充気の気流によって押されるからである。芯材５は、一方向に長い断面形状を有するので、倒れた状態が物理的に安定な状態である。芯材５が楕円の断面形状を有する場合、芯材５は、その楕円の長径方向が略水平になる。   Operation | movement of the fall prevention apparatus 1 comprised as mentioned above is demonstrated. When an operator transfers from the roof inspection scaffold 2 onto the vehicle roof 31 and performs a repair work, the air tube 4 is filled. When the air tube 4 is filled, it expands in the radial direction and closes the gap G (see FIG. 1). When the air tube 4 is filled with the charge / exhaust device 6, the core material 5 falls in the expanded air tube 4 in a sectional view. This is because the air tube 4 is charged from the side far from the vehicle by the charge / exhaust device 6 as indicated by the arrow, so that the core material 5 is pushed by the airflow of charge. Since the core material 5 has a long cross-sectional shape in one direction, the collapsed state is a physically stable state. When the core material 5 has an elliptical cross-sectional shape, the major axis direction of the core material 5 is substantially horizontal.

車両３が動く場合、その前にエアチューブ４が排気される。図３に示すように、エアチューブ４は、充排気装置６によって排気されたとき、径方向に収縮して隙間Ｇを生じさせる。このとき、芯材５は、エアチューブ４内で起立する。矢印で示すように、エアチューブ４が、充排気装置６によって車両３から遠い側から排気されるので、芯材５が排気の気流によって引かれるからである。芯材５が楕円の断面形状を有する場合、芯材５は、楕円の長径方向が略鉛直になる。   Before the vehicle 3 moves, the air tube 4 is exhausted. As shown in FIG. 3, when the air tube 4 is exhausted by the charge / exhaust device 6, the air tube 4 contracts in the radial direction to generate a gap G. At this time, the core material 5 stands up in the air tube 4. This is because the air tube 4 is exhausted from the side far from the vehicle 3 by the charge / exhaust device 6 as indicated by the arrows, so that the core member 5 is drawn by the exhaust airflow. When the core material 5 has an elliptical cross-sectional shape, the major axis direction of the ellipse is substantially vertical.

落下防止装置１において、充排気装置６によらずにエアチューブ４内の空気が抜けることは、異常動作であり、例えば、エアチューブ４がパンクしたときに起きる。図４に示すように、エアチューブ４は、充排気装置６によらずにエアチューブ４内の空気が抜けたとき、隙間Ｇを縮小する。芯材５は、一方向に長い断面形状を有し、倒れた状態が物理的に安定な状態であるので、充排気装置６によらずにエアチューブ４内の空気が抜けたとき、倒れたままである。芯材５が楕円の断面形状を有する場合、芯材５は、楕円の長径方向が略水平のままである。なお、芯材５は、エアチューブ４内で倒れた状態で隙間Ｇを塞ぐように長径が設定されることがさらに望ましい。   In the fall prevention device 1, the air in the air tube 4 escaping without depending on the charge / exhaust device 6 is an abnormal operation, and occurs, for example, when the air tube 4 is punctured. As shown in FIG. 4, the air tube 4 reduces the gap G when the air in the air tube 4 escapes regardless of the charge / exhaust device 6. Since the core material 5 has a long cross-sectional shape in one direction and the collapsed state is a physically stable state, the core material 5 remains collapsed when the air in the air tube 4 escapes without using the charge / exhaust device 6. There is. When the core material 5 has an elliptical cross-sectional shape, the major axis direction of the core material 5 remains substantially horizontal. In addition, as for core material 5, it is still more desirable that a long diameter is set up so that gap G may be closed in the state where it fell down in air tube 4.

このように、本実施形態の落下防止装置１によれば、エアチューブ４は、充気されたとき、車両屋根３１との隙間Ｇを塞ぐので、人及び物の落下が防止される。エアチューブ４は、空気で膨張するものであるので、万一、車両３と接触した状態で車両３が動いても車両３を損傷し難い。また、エアチューブ４は、充排気装置６によって排気されたとき、車両屋根３１との隙間Ｇを生じさせるので、車両３が動いても車両３を損傷しない。さらに、充排気装置６によらずにエアチューブ４内の空気が抜けたとき、芯材５が車両屋根３１との隙間Ｇを縮小するので、人及び大きな物の落下が防止される。   As described above, according to the fall prevention device 1 of the present embodiment, the air tube 4 closes the gap G with the vehicle roof 31 when the air tube 4 is filled, thereby preventing a person and an object from falling. Since the air tube 4 expands with air, the vehicle 3 is unlikely to be damaged even if the vehicle 3 moves while in contact with the vehicle 3. Moreover, since the air tube 4 produces the gap G with the vehicle roof 31 when being exhausted by the charge / exhaust device 6, the vehicle 3 is not damaged even if the vehicle 3 moves. Furthermore, when the air in the air tube 4 escapes without using the charge / exhaust device 6, the core material 5 reduces the gap G with the vehicle roof 31, thereby preventing people and large objects from falling.

なお、本発明は、上記の実施形態の構成に限られず、発明の要旨を変更しない範囲で種々の変形が可能である。例えば、芯材５の断面形状は、楕円に限定されず、八角形等の多角形であってもよい。   In addition, this invention is not restricted to the structure of said embodiment, A various deformation | transformation is possible in the range which does not change the summary of invention. For example, the cross-sectional shape of the core material 5 is not limited to an ellipse, and may be a polygon such as an octagon.

１ 落下防止装置
２ 屋根上点検足場
３ 車両（鉄道車両）
３１ 車両屋根
４ エアチューブ
５ 芯材
６ 充排気装置
Ｇ 屋根上点検足場と車両屋根との隙間 1 Fall prevention device 2 Roof inspection scaffold 3 Vehicle (Railway)
31 Vehicle roof 4 Air tube 5 Core material 6 Charge / exhaust device G Clearance between roof inspection scaffold and vehicle roof

Claims (4)

鉄道車両の検修を行う場所における屋根上点検足場と車両屋根との隙間からの人又は物の落下を防止するための落下防止装置であって、
屋根上点検足場の車両側端部に沿って設けられた長尺状のエアチューブと、
前記エアチューブ内に設けられた長尺状の芯材と、
前記エアチューブを充気及び排気するための充排気装置とを備え、
前記エアチューブは、充気されたとき、径方向に膨張して前記隙間を塞ぎ、前記充排気装置によって排気されたとき、径方向に収縮して前記隙間を生じさせ、
前記芯材は、前記充排気装置によらずに前記エアチューブ内の空気が抜けたとき、前記隙間を縮小することを特徴とする落下防止装置。 A fall prevention device for preventing a person or an object from falling from a gap between a roof inspection scaffold and a vehicle roof in a place where a railway vehicle is inspected,
A long air tube provided along the vehicle side end of the roof inspection scaffold;
A long core provided in the air tube;
A charge / exhaust device for charging and exhausting the air tube;
When the air tube is filled, it expands in the radial direction to close the gap, and when exhausted by the charge / exhaust device, the air tube contracts in the radial direction to generate the gap,
The core material reduces the gap when the air in the air tube escapes without using the charge / exhaust device. 前記エアチューブは、膨張したときに円筒形であり、前記充排気装置によって車両から遠い側から充排気され、
前記芯材は、一方向に長い断面形状を有し、
前記エアチューブが前記充排気装置によって充気されるとき、断面視で、前記芯材は、膨張した前記エアチューブ内で倒れ、
前記エアチューブが前記充排気装置によって排気されるとき、前記芯材は、前記エアチューブ内で起立し、
前記充排気装置によらずに前記エアチューブ内の空気が抜けるとき、前記芯材は、前記エアチューブ内で倒れたままであることを特徴とする請求項１に記載の落下防止装置。 The air tube is cylindrical when inflated, and is charged / exhausted from the side far from the vehicle by the charging / discharging device,
The core material has a long cross-sectional shape in one direction,
When the air tube is charged by the charge / exhaust device, in a cross-sectional view, the core member collapses in the expanded air tube,
When the air tube is exhausted by the charge / exhaust device, the core material stands up in the air tube,
2. The fall prevention device according to claim 1, wherein when the air in the air tube escapes without depending on the charge / exhaust device, the core member remains fallen in the air tube. 前記芯材は、楕円の断面形状を有し、
前記エアチューブが前記充排気装置によって充気されたとき、前記芯材は、前記楕円の長径方向が略水平になり、
前記エアチューブが前記充排気装置によって排気されたとき、前記芯材は、前記長径方向が略鉛直になり、
前記充排気装置によらずに前記エアチューブ内の空気が抜けたとき、前記芯材は、前記長径方向が略水平のままであることを特徴とする請求項２に記載の落下防止装置。 The core has an elliptical cross-sectional shape,
When the air tube is filled with the charge / exhaust device, the core material is substantially horizontal in the major axis direction of the ellipse,
When the air tube is exhausted by the charge / exhaust device, the core material is substantially vertical in the major axis direction,
The fall prevention device according to claim 2, wherein when the air in the air tube escapes without using the charge / exhaust device, the core material remains substantially horizontal in the major axis direction. 前記エアチューブは、ゴム製であり、
前記芯材は、発泡樹脂製であることを特徴とする請求項１乃至請求項３のいずれか一項に記載の落下防止装置。




The air tube is made of rubber,
The fall prevention device according to any one of claims 1 to 3, wherein the core material is made of foamed resin.




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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06329003A (en) * 1993-05-21 1994-11-29 East Japan Railway Co Vehicle inspecting equipment
JPH11269900A (en) * 1998-03-24 1999-10-05 Daimei Kk Temporary lid for preventing falling to manhole
JP2000095099A (en) * 1998-09-24 2000-04-04 Nec Mobile Commun Ltd Method and device for preventing accident such as downfall
US20120067669A1 (en) * 2009-09-11 2012-03-22 Changchun Railway Vehicles Co., Ltd. Safety protection device for roof construction of train body assembly
JP2014136892A (en) * 2013-01-16 2014-07-28 Nippon Steel & Sumitomo Metal Device for protection from falling object in chimney

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06329003A (en) * 1993-05-21 1994-11-29 East Japan Railway Co Vehicle inspecting equipment
JPH11269900A (en) * 1998-03-24 1999-10-05 Daimei Kk Temporary lid for preventing falling to manhole
JP2000095099A (en) * 1998-09-24 2000-04-04 Nec Mobile Commun Ltd Method and device for preventing accident such as downfall
US20120067669A1 (en) * 2009-09-11 2012-03-22 Changchun Railway Vehicles Co., Ltd. Safety protection device for roof construction of train body assembly
JP2014136892A (en) * 2013-01-16 2014-07-28 Nippon Steel & Sumitomo Metal Device for protection from falling object in chimney

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