JPH07125635A - Truck for rolling stock - Google Patents

Truck for rolling stock

Info

Publication number
JPH07125635A
JPH07125635A JP5276449A JP27644993A JPH07125635A JP H07125635 A JPH07125635 A JP H07125635A JP 5276449 A JP5276449 A JP 5276449A JP 27644993 A JP27644993 A JP 27644993A JP H07125635 A JPH07125635 A JP H07125635A
Authority
JP
Japan
Prior art keywords
bogie
cover
truck
railcar
view
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP5276449A
Other languages
Japanese (ja)
Other versions
JP3173255B2 (en
Inventor
Atsushi Furukawa
淳 古川
Minoru Nakamura
実 中村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP27644993A priority Critical patent/JP3173255B2/en
Publication of JPH07125635A publication Critical patent/JPH07125635A/en
Application granted granted Critical
Publication of JP3173255B2 publication Critical patent/JP3173255B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance

Landscapes

  • Vibration Prevention Devices (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)

Abstract

PURPOSE:To reduce the noise generated from the lower part of a truck, and prevent ballasts from being flung up in a rolling stock when it is traveling at high speed. CONSTITUTION:A mounting seat is provided on a main motor seat 13 and a caliper seat consisting of a truck, and a truck cover which is formed smooth is bolted to the mounting seat in an approximately horizontal manner. The truck cover is provided so as to cover the lower parts of a main motor 7, a center pin or the like. This constitution reduces the noise generated from the lower part of the truck, and prevents the ballasts from being flung up.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、鉄道車両用台車に係
り、特に高速で走行する車両に好敵な鉄道車両用台車に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railcar bogie, and more particularly to a railcar bogie that is suitable for a vehicle traveling at high speed.

【０００２】[0002]

【従来の技術】従来の鉄道車両用台車を図１５ないし図
１７によって説明する。図１５に従来の高速走行用ボル
スタレス台車の一例、図１６に図１５の側面図、図１７
に図１５の断面ＤＤ図を示す。同図において、輪軸組立
１の両端に取付けた軸箱２の上に、軸バネ３を取付け、
前記軸バネ３上に台車枠４が支持されている。前記台車
枠４上に空気バネ５を取付け、該空気バネ５により車体
を支持する構造となっている。台車枠４には、ブレーキ
装置６、主電動機７、増圧シリンダ８、歯車吊り装置９
を取付けるための各ブラケットが構成されており、前記
各部品が締結されている。また、台車中央部には車体に
取付けられた中心ピン１０が配置されており、前記中心
ピン１０は一本リンク１１により台車枠４と締結され前
後力を伝達する構成となっている。一例として、実開３
−１０９９７３に示す台車が挙げられる。2. Description of the Related Art A conventional bogie for a railway vehicle will be described with reference to FIGS. FIG. 15 shows an example of a conventional high-speed bolsterless truck, FIG. 16 is a side view of FIG. 15, and FIG.
FIG. 15 shows a sectional DD view of FIG. In the figure, the shaft springs 3 are mounted on the shaft boxes 2 mounted on both ends of the wheel assembly 1,
A bogie frame 4 is supported on the shaft spring 3. An air spring 5 is attached on the bogie frame 4, and the air spring 5 supports the vehicle body. The bogie frame 4 includes a brake device 6, a main motor 7, a pressure increasing cylinder 8, and a gear suspension device 9.
Each of the brackets for mounting the above is constructed, and each of the above parts is fastened. A center pin 10 attached to the vehicle body is arranged in the center of the bogie, and the center pin 10 is fastened to the bogie frame 4 by a single link 11 to transmit the longitudinal force. As an example, actual operation 3
The dolly shown in -109973 is mentioned.

【０００３】[0003]

【発明が解決しようとする課題】上記従来の台車は、必
要な機器が必要な部位に取付けられて、台車下部は凸凹
になっており、台車下部の空気の流れを整風するものは
なかった。このため、台車下部の空気の流れが乱れ、複
雑な渦流を発生し、騒音の原因となるとともに、渦流に
より、軌道に施設されたバラストを巻き上げて飛散をさ
せてしまうという不具合が生じていた。In the above-mentioned conventional bogie, the necessary equipment is attached to a necessary part, and the lower part of the bogie is uneven, and there is no one that regulates the air flow in the lower part of the bogie. For this reason, the air flow in the lower part of the bogie is disturbed, a complicated vortex is generated, which causes noise, and there is a problem that the vortex causes the ballast installed in the track to be rolled up and scattered.

【０００４】本発明は、前記従来例の問題点を解決する
ため、台車下部を平滑化するためのカバーを設けて、台
車下部の空気の乱れを防止して、騒音を抑制するととも
に、バラストの飛散防止を図ることを目的としている。In order to solve the above-mentioned problems of the prior art, the present invention provides a cover for smoothing the lower part of the bogie to prevent air turbulence in the lower part of the bogie, suppress noise, and prevent ballast. The purpose is to prevent scattering.

【０００５】[0005]

【課題を解決するための手段】鉄道車両の台車枠には、
その走行性能を確保するため、主電動機・ブレーキ装置
・歯車装置等が効率よく取付けられている。しかしなが
ら、これらの機器は、各々に最適な形状寸法で構成され
ており、台車枠に取付けた状態においては、必ずしも整
然で平滑な状態にはなっていない。このため、前記各機
器の下部に平滑なカバーを設けて空気の流れを整風する
手法を考案した。[Means for Solving the Problems] In the bogie frame of a railway vehicle,
In order to ensure its running performance, the main motor, brake device, gear device, etc. are installed efficiently. However, these devices are configured with optimum shape and dimensions, and are not necessarily in an orderly and smooth state when mounted on the bogie frame. For this reason, a method has been devised in which a smooth cover is provided at the bottom of each device to regulate the flow of air.

【０００６】下部カバーの基本的な構成としては、左右
車輪間と前後車軸間をカバーするものであるが、電動台
車のように主電動機や歯車装置を有するものについて
は、前後方向は各機器の取付ブラケット間で構成するこ
とも考えられる。また、左右方向についても、側バリ下
部まで延長して前後軸箱間の整風まで考慮することも考
えられる。さらに、当該カバーは保守性を考慮して着脱
を容易にして、必要部位には点検窓を設け、保守作業の
容易化を考慮している。本カバーの材質は、振動や飛石
に対して十分な強度を有する必要があり、鋼製薄板，ア
ルミ合金板，アルミハニカム材，繊維強化プラスチック
やその他複合材料により構成することが考えられる。The basic structure of the lower cover is to cover the space between the left and right wheels and the space between the front and rear axles. However, in the case of an electric trolley having a main electric motor and a gear device, the front and rear directions of each device are different. It is also conceivable to configure between the mounting brackets. Also in the left-right direction, it may be possible to extend to the lower part of the side burr and consider the air conditioning between the front and rear axle boxes. Further, the cover is designed to be easily attached and detached in consideration of maintainability, and an inspection window is provided in a necessary portion to facilitate maintenance work. The material of this cover needs to have sufficient strength against vibrations and flying stones, and it is conceivable that it is made of steel thin plate, aluminum alloy plate, aluminum honeycomb material, fiber reinforced plastic or other composite material.

【０００７】[0007]

【作用】台車下部カバーは進行方向の空気の流れを整風
するとともに、万一、バラスト等が飛散して来た時に
は、台車枠に取付けられた機器を保護することができ、
かつ、該バラストの車体側方への飛散も抑制することが
できる。[Function] The lower cover of the bogie regulates the air flow in the traveling direction and protects the equipment attached to the bogie frame in the unlikely event that ballast or the like is scattered.
At the same time, it is possible to prevent the ballast from scattering to the side of the vehicle body.

【０００８】[0008]

【実施例】本発明では台車下面に台車カバーを取付ける
ことによって、台車下面の空気の流れを滑らかにする。
図１は本発明による台車カバー１２を付けた場合の平面
図、図２は図１の側面図を示す。同図において、前記従
来例と同一符号は、同一部材を示すものである。主電動
機受１３及びキャリパ受１４の下部に取付座を設置し、
カバー１２をボルト締結する方式とし、高速走行時の風
圧、振動に対しても十分な強度を持つようにした。前記
カバー１２を設置することにより、台車下面の平滑化が
図れ、騒音の発生を抑え、かつ、走行風の乱れを防止し
てバラストの飛散を抑することができる。バラストの飛
散による機器の損傷を防止できる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the flow of air on the lower surface of the bogie is made smooth by attaching a bogie cover to the lower surface of the bogie.
FIG. 1 is a plan view showing a case where a truck cover 12 according to the present invention is attached, and FIG. 2 is a side view of FIG. In the figure, the same reference numerals as those of the conventional example indicate the same members. Installation seats are installed under the main motor receiver 13 and the caliper receiver 14,
The cover 12 is bolted so that it has sufficient strength against wind pressure and vibration during high-speed traveling. By installing the cover 12, it is possible to smooth the lower surface of the bogie, suppress the generation of noise, prevent the disturbance of the traveling wind, and suppress the scattering of ballast. Equipment damage due to ballast scattering can be prevented.

【０００９】図３、図４は、図１、図２と同様に主電動
機受１３及びキャリパ受１４下部にボルト締結する方式
の台車カバー１２において、更に前後方向から、中心ピ
ン１０に当たる風を防ぐため、横ハリ１５の下の隙間を
埋める形で垂直板１６を設けた方式とした例を示す。図
５は、図３の正面図を示す。このように横ハリの空間を
垂直板１７でふさげば、中心ピン１０に風が当たること
により発生する騒音を防止することができる。3 and 4, in the same manner as FIGS. 1 and 2, in the bogie cover 12 of the type in which bolts are fastened to the lower parts of the main motor receiver 13 and the caliper receiver 14, the wind that hits the center pin 10 from the front and rear direction is further prevented. Therefore, an example in which the vertical plate 16 is provided so as to fill the gap below the lateral tension 15 will be shown. FIG. 5 shows a front view of FIG. Thus, by closing the space of the horizontal tension with the vertical plate 17, it is possible to prevent the noise generated by the wind hitting the center pin 10.

【００１０】さらに実施例について説明する。図３に示
した実施例において、台車カバー１２が取外せることを
考慮した台車構造の例として図６に示す。Further examples will be described. In the embodiment shown in FIG. 3, FIG. 6 shows an example of a bogie structure in consideration of the fact that the bogie cover 12 can be removed.

【００１１】同図において、台車カバー１２と垂直板１
７がボルト締結により分割されるようにして、垂直板１
７を残したまま台車カバー１２を横から引き出すことが
可能である。In the figure, the trolley cover 12 and the vertical plate 1
Vertical plate 1 so that 7 is divided by bolts
It is possible to pull out the trolley cover 12 from the side while leaving 7.

【００１２】図７ないし図９の実施例は、台車カバー１
２を輪軸組立１の下部まで延長拡大したものである。こ
うすることにより、台車下面の平滑な部分が前記各実施
例より大きくなる。取付方法としては、両端部で主電動
機７にボルト締結とし、他は図１，図２の実施例と同様
の主電動機１３及びキャリパ受１４の位置でボルト締結
とする。また、台車カバー１２はバネ間部材となり、走
行時にバネ撓みにより変位するため輪軸組立１との間に
隙間を開ける必要がある。さらに歯車装置１７の下部で
は固定することができないため、歯車装置１７の下方の
部分では台車カバー１２を切り欠いておく。このような
構成によれば、台車のほぼ全体の下面が平滑となること
から、さらに低騒音化が図れ、かつ、ハラストの飛散を
防止できる。The embodiment of FIGS. 7 to 9 is based on the trolley cover 1.
2 is extended and expanded to the lower part of the wheel set 1. By doing so, the smooth portion of the lower surface of the bogie becomes larger than that in each of the above embodiments. As for the mounting method, bolts are fastened to the main electric motor 7 at both ends, and bolts are fastened at the positions of the main electric motor 13 and the caliper receiver 14 which are the same as those in the embodiment of FIGS. Further, since the truck cover 12 serves as an inter-spring member and is displaced due to the spring flexure during traveling, it is necessary to open a gap with the wheel shaft assembly 1. Further, since the lower part of the gear device 17 cannot be fixed, the trolley cover 12 is cut out in the lower part of the gear device 17. According to such a configuration, since the lower surface of almost the entire bogie is smooth, it is possible to further reduce noise and prevent scattering of harast.

【００１３】また、台車カバー１２の取外しを考慮し
て、車輪内側まで幅を狭めた実施例を図１０により説明
する。すなわち、台車カバー１２は、前記図７の実施例
に比べ取付部材が少なく、また、キャリパブレーキ下部
を開口していることから、保持点検が容易に行なえるも
のである。An embodiment in which the width is narrowed to the inside of the wheel in consideration of removal of the truck cover 12 will be described with reference to FIG. That is, the trolley cover 12 has fewer mounting members than the embodiment shown in FIG. 7 and the lower part of the caliper brake is open, so that the holding and inspection can be easily performed.

【００１４】図１１，図１２の実施例も図７，図８と同
様に、台車カバー１２を車軸まで拡大した実施例を示
す。ここでは台車カバー１２の先端を主電動機７端部で
垂直に曲げて、主電動機７にボルト締結し、輪軸組立１
からの干渉を避けている。Similarly to FIGS. 7 and 8, the embodiment of FIGS. 11 and 12 also shows an embodiment in which the bogie cover 12 is enlarged to the axle. Here, the tip of the trolley cover 12 is bent vertically at the end of the main motor 7 and fastened to the main motor 7 with bolts, and the wheel shaft assembly 1
Avoid interference from.

【００１５】図１３，図１４の実施例は、前記他の実施
例に示した台車カバーにおいて、中央部に保守作業用の
点検穴を明け、更に走行時に点検穴をふさぐための蓋１
８を取付け、下面を平滑にした例を示す。点検穴の縁に
は、蓋受座１９を設け、蓋１８を蓋受座１９に下から押
し当て、ボルトで締結する。In the embodiment of FIGS. 13 and 14, in the bogie cover shown in the other embodiment, an inspection hole for maintenance work is opened in the center portion, and a lid 1 for closing the inspection hole during traveling is further provided.
8 is attached and the lower surface is made smooth. A lid seat 19 is provided at the edge of the inspection hole, and the lid 18 is pressed against the lid seat 19 from below and fastened with a bolt.

【００１６】[0016]

【発明の効果】台車下部に平滑な板を設けることによ
り、台車下面の進行方向の空気の流れが滑らかになり、
騒音低減とバラスト巻き上げ防止の効果がある。また、
バラストなど地面からの飛散物から台車各部品を保護す
る役割も果たす。By providing a smooth plate on the lower part of the bogie, the air flow in the traveling direction of the underside of the bogie becomes smooth,
It has the effect of reducing noise and preventing ballast hoisting. Also,
It also plays a role in protecting each part of the bogie from flying materials such as ballast.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の一実施例の台車を示す平面図である。FIG. 1 is a plan view showing a truck according to an embodiment of the present invention.

【図２】図１の側面図である。FIG. 2 is a side view of FIG.

【図３】本発明の他の実施例の台車を示す平面図であ
る。FIG. 3 is a plan view showing a truck according to another embodiment of the present invention.

【図４】図３の側面図である。FIG. 4 is a side view of FIG.

【図５】図４の正面図である。FIG. 5 is a front view of FIG.

【図６】本発明の他の実施例の台車を示す側面図であ
る。FIG. 6 is a side view showing a truck according to another embodiment of the present invention.

【図７】本発明の他の実施例の台車を示す平面図であ
る。FIG. 7 is a plan view showing a truck according to another embodiment of the present invention.

【図８】図７のＡＡ部断面図である。8 is a cross-sectional view taken along the line AA of FIG.

【図９】図７の正面図である。9 is a front view of FIG. 7. FIG.

【図１０】本発明の他の実施例の台車を示す平面図であ
る。FIG. 10 is a plan view showing a truck according to another embodiment of the present invention.

【図１１】本発明の他の実施例の台車を示す平面図であ
る。FIG. 11 is a plan view showing a truck according to another embodiment of the present invention.

【図１２】図１１のＢＢ部断面図である。FIG. 12 is a sectional view taken along line BB of FIG.

【図１３】本発明の他の実施例の台車を示す平面図であ
る。FIG. 13 is a plan view showing a truck according to another embodiment of the present invention.

【図１４】図１３のＣＣ部断面図である。FIG. 14 is a cross-sectional view of a CC section in FIG.

【図１５】従来の台車を示す平面図である。FIG. 15 is a plan view showing a conventional truck.

【図１６】図１５の側面図である。16 is a side view of FIG.

【図１７】図１５のＤＤ部断面図である。FIG. 17 is a cross-sectional view taken along line DD of FIG.

【符号の説明】[Explanation of symbols]

１…輪軸組立、２…軸箱、３…軸バネ、４…台車枠、５
…空気バネ、６…ブレーキ装置、７…主電動機、８…増
圧シリンダ、９…歯車箱吊り装置、１０…中心ピン、１
１…一本リンク、１２…台車カバー、１３…主電動機
受、１４…キャリパ受、１５…横梁、１６…垂直板、１
７…歯車装置、１８…蓋、１９…蓋受座。1 ... Wheel axle assembly, 2 ... Shaft box, 3 ... Shaft spring, 4 ... Bogie frame, 5
... Air spring, 6 ... Brake device, 7 ... Main motor, 8 ... Booster cylinder, 9 ... Gear box suspension device, 10 ... Center pin, 1
1 ... Single link, 12 ... Bogie cover, 13 ... Main motor receiver, 14 ... Caliper receiver, 15 ... Horizontal beam, 16 ... Vertical plate, 1
7 ... Gear device, 18 ... Lid, 19 ... Lid seat.

Claims (8)

【特許請求の範囲】[Claims] 【請求項１】台車下部に水平面内において平滑なカバー
を取付けたことを特徴とした鉄道車両用台車。1. A trolley for a railway vehicle, characterized in that a smooth cover is attached to a lower portion of the trolley in a horizontal plane. 【請求項２】請求項１に記載の鉄道車両用台車におい
て、前記カバーは横梁に取付けられたブラケット下部を
取付部として設置されていることを特徴とする鉄道車両
用台車。2. A bogie for a railcar according to claim 1, wherein the cover is installed with a lower portion of a bracket attached to a lateral beam as a mounting portion. 【請求項３】請求項２に記載の鉄道車両用台車におい
て、取付部のブラケット同士のすきまを垂直平面で塞い
だことを特徴とする鉄道車両用台車。3. A bogie for a railcar according to claim 2, wherein the clearance between the brackets of the mounting portion is closed by a vertical plane. 【請求項４】請求項１に記載の鉄道車両用台車におい
て、前記カバーを前後車軸間に延長配置したことを特徴
とする鉄道車両用台車。4. The railcar bogie according to claim 1, wherein the cover is extended between the front and rear axles. 【請求項５】請求項１に記載の鉄道車両用台車におい
て、前記カバーを鋼製薄板で構成したことを特徴とする
鉄道車両用台車。5. The railcar bogie according to claim 1, wherein the cover is made of a thin steel plate. 【請求項６】請求項１に記載の鉄道車両用台車におい
て、前記カバーをアルミハニカム材により構成したこと
を特徴とする鉄道車両用台車。6. The bogie for a railcar according to claim 1, wherein the cover is made of an aluminum honeycomb material. 【請求項７】請求項１に記載の鉄道車両用台車におい
て、前記カバー取付部を主電動機本体部に構成したこと
を特徴とする鉄道車両用台車。7. A bogie for a railcar according to claim 1, wherein the cover mounting portion is formed on a main motor main body portion. 【請求項８】請求項１に記載の鉄道車両用台車におい
て、前記カバーに保守作業のための点検穴を開けたこと
を特徴とする鉄道車両用台車。8. The bogie for railway vehicles according to claim 1, wherein the cover has an inspection hole for maintenance work.
JP27644993A 1993-11-05 1993-11-05 Railcar bogie Expired - Fee Related JP3173255B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27644993A JP3173255B2 (en) 1993-11-05 1993-11-05 Railcar bogie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27644993A JP3173255B2 (en) 1993-11-05 1993-11-05 Railcar bogie

Publications (2)

Publication Number Publication Date
JPH07125635A true JPH07125635A (en) 1995-05-16
JP3173255B2 JP3173255B2 (en) 2001-06-04

Family

ID=17569593

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27644993A Expired - Fee Related JP3173255B2 (en) 1993-11-05 1993-11-05 Railcar bogie

Country Status (1)

Country Link
JP (1) JP3173255B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1116638A1 (en) * 2000-01-17 2001-07-18 Hitachi, Ltd. Railway vehicle bogie with vibrations reducing device
JP2005153755A (en) * 2003-11-27 2005-06-16 Hitachi Ltd Railroad vehicle
JP2005262962A (en) * 2004-03-17 2005-09-29 Railway Technical Res Inst Aerodynamic noise reducing structure of moving body
JP2010149808A (en) * 2008-12-26 2010-07-08 Hitachi Ltd Bogie for railroad vehicle
JP2018144685A (en) * 2017-03-07 2018-09-20 川崎重工業株式会社 Truck frame for railway vehicle and railway vehicle including the same
JP2019199114A (en) * 2018-05-14 2019-11-21 東日本旅客鉄道株式会社 Truck cover
JP2019199112A (en) * 2018-05-14 2019-11-21 東日本旅客鉄道株式会社 Fastening member
JP2019199117A (en) * 2018-05-14 2019-11-21 東日本旅客鉄道株式会社 Truck cover and installation structure for the same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1116638A1 (en) * 2000-01-17 2001-07-18 Hitachi, Ltd. Railway vehicle bogie with vibrations reducing device
JP2005153755A (en) * 2003-11-27 2005-06-16 Hitachi Ltd Railroad vehicle
JP2005262962A (en) * 2004-03-17 2005-09-29 Railway Technical Res Inst Aerodynamic noise reducing structure of moving body
JP2010149808A (en) * 2008-12-26 2010-07-08 Hitachi Ltd Bogie for railroad vehicle
JP4685921B2 (en) * 2008-12-26 2011-05-18 株式会社日立製作所 Railcar bogie
JP2018144685A (en) * 2017-03-07 2018-09-20 川崎重工業株式会社 Truck frame for railway vehicle and railway vehicle including the same
JP2019199114A (en) * 2018-05-14 2019-11-21 東日本旅客鉄道株式会社 Truck cover
JP2019199112A (en) * 2018-05-14 2019-11-21 東日本旅客鉄道株式会社 Fastening member
JP2019199117A (en) * 2018-05-14 2019-11-21 東日本旅客鉄道株式会社 Truck cover and installation structure for the same

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