WO2012107894A1 - Assise transportable de manière compacte pour assemblage sur site et procédés correspondants - Google Patents

Assise transportable de manière compacte pour assemblage sur site et procédés correspondants Download PDF

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Publication number
WO2012107894A1
WO2012107894A1 PCT/IB2012/050581 IB2012050581W WO2012107894A1 WO 2012107894 A1 WO2012107894 A1 WO 2012107894A1 IB 2012050581 W IB2012050581 W IB 2012050581W WO 2012107894 A1 WO2012107894 A1 WO 2012107894A1
Authority
WO
WIPO (PCT)
Prior art keywords
seat
wall
seat shell
components
sets
Prior art date
Application number
PCT/IB2012/050581
Other languages
English (en)
Inventor
Dan Raz
Zeev Geva
Zeev SCHREIBER
Amir RAZ
Original Assignee
Paltechnica Nitzanim A.C.C. 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 Paltechnica Nitzanim A.C.C. Ltd. filed Critical Paltechnica Nitzanim A.C.C. Ltd.
Publication of WO2012107894A1 publication Critical patent/WO2012107894A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D33/00—Seats
    • B61D33/0007—Details; Accessories
    • B61D33/0014—Seat frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D33/00—Seats
    • B61D33/0057—Seats characterised by their mounting in vehicles

Definitions

  • the present invention relates to seating and, in particular, it concerns compactly transportable seating systems suitable for on-site assembly, particularly for railway carriages and the like.
  • Train bench seats are manufactured in production floors, using for example welding machines, and are typically transported and installed in train wagons as pre- assembled, heavy and sizeable pieces of furniture.
  • Train bench seats installed to the car's perimeter walls may have 1, 2, 3, 4, 5, 6, 7 or more passenger seats and hence are heavy pieces of furniture that require expensive transportation and installation.
  • the present invention is a shipping configuration for compact transportation of seating for on-site assembly, and a corresponding method of assembling a seat.
  • a method for assembling a wall-mounted seat comprising: (a) providing on the wall at least an upper horizontal member; (b) attaching a plurality of shaped ribs to the wall by attachment to at least the upper horizontal member to form a support structure; and (c) attaching to the support structure a seat shell so that the seat shell is supported by the shaped ribs to form a seat.
  • the seat shell is a press-formed sheet-metal structure.
  • the seat shell is configured to nest with other similar seat shells for compact transportation.
  • the seat shell is attached to the upper horizontal member via a hook-in-siot engagement configuration.
  • the support structure and the seat shell are sized and shaped to define a multi-person bench seat.
  • the seat shell extends for a full length of the multi- person bench seat.
  • the seat shell is one of a plurality of seat shells each of which extends along only a part of a length of the multi-person bench seat.
  • the step of providing further comprises providing a lower horizontal member, the upper and lower horizontal members being separated by a given vertical spacing, and wherein the plurality of shaped ribs are attached to both the upper and lower horizontal members.
  • the step of providing is performed by attaching the upper and lower horizontal members to the wall.
  • the upper and lower horizontal members are interconnected by a plurality of vertical spacers to define a frame.
  • the step of providing is performed by providing specification of required features of the upper horizontal member to a party responsible for design or production of the wall.
  • a lower cover is attached to the support structure such that the seat shell and the lower cover at least partially delineate a substantially closed inner volume bounded by the wall.
  • the wall is part of a railway carriage.
  • a shipping configuration comprising: (a) a shipping container; and (b) a plurality of sets of components for assembling wall-mounted seats, the plurality of sets of components being packed within the shipping container, each of the sets of components comprising: (i) a plurality of shaped ribs configured for mounting directly or indirectly on a wall to form a support structure; and (ii) a seat shell for attachment to the support structure so as to be supported by the shaped ribs to form a seat, wherein the seat shells for the plurality of sets of components are nested with each other for compact storage within the shipping container.
  • the seat shell is a press-formed sheet-metal structure.
  • the sets of components further comprise at least an upper horizontal member configured for attachment to a wall, and wherein the plurality of shaped ribs are configured for attachment to the upper and lower horizontal members.
  • the seat shell and the upper horizontal member include complementary hook-and-slot engagement features.
  • the support structure and the seat shell are sized and shaped to define a multi-person bench seat.
  • the seat shell extends for a full length of the multi-person bench seat.
  • the seat shell is one of a plurality of seat shells each of which extends along only a part of a length of the multi-person bench seat.
  • the sets of components further comprise at least an upper horizontal member and a lower horizontal member configured for attachment to a wall separated by a given vertical spacing, and wherein the plurality of shaped ribs are configured for attachment to the wall by attachment to at least the upper horizontal member.
  • the upper and lower horizontal members are interconnected by a plurality of vertical spacers to define a frame.
  • each set of components further comprises a lower cover for attachment to the support structure such that the seat shell and the lower cover at least partially delineate a substantially closed inner volume bounded by the wall.
  • a shipping configuration comprising: (a) a shipping container; and (b) a plurality of sets of components for assembling wall-mounted seats, the plurality of sets of components being packed within the shipping container, each of the sets of components comprising at least a seat shell for attachment to a wall-mounted support structure to form a seat, wherein the seat shells for the plurality of sets of components are nested with each other for compact storage within the shipping container.
  • the seat shell is a press-formed sheet-metal structure.
  • FIG. 1 is a schematic isometric view of a 7 seat train bench seat, constructed and operative according to an embodiment of the present invention, assembled on a wall of a railway carriage;
  • FIG. 2 illustrates a wall frame of the seat of FIG. 1;
  • FIG. 3 A illustrates a plurality of support ribs attached to the frame of FIG. 2 to form a support structure of the seat of FIG. 1 ;
  • FIGS. 3B and 3C are isometric enlarged views of a rib from the support structure of FIG. 3 A;
  • FIG. 4 A is a lower isometric view of the support structure of FIG. 3 A;
  • FIG. 4B is an enlarged view of a circled region of FIG. 4 A as indicated;
  • FIG. 5 A is a lower isometric view of the seat of FIG. 1;
  • FIG. 5B is an enlarged view of a circled region of FIG. 5 A as indicated;
  • FIG. 6 is an isometric view of a seat shell from the seat of FIG. 1;
  • FIG. 7 is an isometric view of the support structure of FIG. 3 A with addition of a lower cover, and ready to receive the seat shell of FIG. 6;
  • FIG. 8 A is a rear isometric view of the seat shell of FIG. 6;
  • FIG. 8B is an enlarged view of a circled region of FIG. 8 A as indicated;
  • FIG. 9 A is a rear isometric view of the support structure of FIG. 7;
  • FIG. 9B is an enlarged view of a circled region of FIG. 9A as indicated;
  • FIG. 10A is a cut-away view of the seat of FIG. 1;
  • FIGS. 10B and IOC are enlarged views of circled regions of FIG. 10A as indicated;
  • FIGS. 11 A and 1 IB are isometric views illustrating a shipping configuration of the components of a plurality of the seats of FIG. 1 (2-seat and 7-seat versions) packed within a shipping container, where the walls of the shipping container have been rendered transparent to reveal the contents;
  • FIG. 12 is a schematic isometric view of a 4 seat train bench seat, constructed and operative according to an embodiment of the present invention, employing a plurality of separate seat shells;
  • FIG. 13 illustrates upper and lower horizontal members from the seat of FIG. 12, attached to a wall;
  • FIG. 14 illustrates a plurality of support ribs being attached to the members of FIG. 13 to form a support structure
  • FIG. 15 illustrates the support structure of the seat of FIG. 12 with addition of a lower cover
  • FIG. 16 illustrates the support structure of FIG. 15 during attachment of the seat shells
  • FIG. 17 is an enlarged rear isometric view of a seat shell from the seat of FIG. 12.
  • FIGS. 18A and 18B are isometric views illustrating a shipping configuration of the components of a plurality of the seats of FIG. 12 packed within a shipping container, where the walls of the shipping container have been rendered transparent to reveal the contents.
  • the present invention is a shipping configuration for compact transportation of seating for on-site assembly, and a corresponding method of assembling a seat.
  • FIGS. 1-18B illustrate various embodiments of seats, shipping configurations and methods of assembly according to the teachings of the present invention.
  • an aspect of the present invention provides a method for assembling a wall-mounted seat 100 (FIG. 1) or 200 (FIG. 12) supported on a wall 10 by at least an upper horizontal member 102 and a lower horizontal member 104 (FIGS. 2 and 13), separated by a given vertical spacing.
  • the horizontal members 102, 1.04 are interconnected by a plurality of vertical spacers 106 to define a frame (FIG. 2).
  • the horizontal members may be components of the assembly shipped together with other parts of the seat, for attachment to the wall in situ, or may be integrated with the wall as part of a dedicated wall design prepared for attachment of seats according to the teachings of the present invention.
  • a plurality of shaped ribs 108, 110 are mounted between upper and lower horizontal members 102, 104 (FIGS. 3A-4B and 14-15) so as to project outwards from the wall, thereby forming a support structure (FIGS. 7 and 15).
  • On or more seat shell 112, 212 are then attached to the support structure so that seat shell(s) 112, 212 are supported by the shaped ribs to form a seat.
  • shell is used herein in the description and claims to refer to an outer layer of a structure which typically lacks sufficient structural strength to provide the required functionality alone, but cooperates with an underlying support structure to offer a highly advantageous combination of properties.
  • the shell is typically implemented as a relatively thin layer of generally uniform thickness material, and typically relies upon structural support from other elements in order to provide the rigidity or strength required for its function.
  • the seat shells of the present invention are implemented as press-formed sheet metal structures.
  • seat shells 112, 212 are configured to nest with other similar seat shells for compact transportation, thereby providing profound advantages over pre- assembled furniture in terms of shipping costs.
  • various preferred embodiments of the present invention allow assembly of the seats on site without requiring skilled workmanship or unusual tools.
  • the present invention is described as relating to "wall-mounted” seats.
  • the word “wall” is used herein to refer to any and all generally upright surfaces to which seats are to be mounted, and includes various partitions and other upright support structures, even where they perform no additional function other than as a support for seats.
  • Certain embodiments of the present invention enable manufacturing and installing of the train bench seats that overcome the difficulties and limitations of the prior art train bench seats by using a wall frame hung on the train car side walls and modular parts that are transported conveniently in parts, and are installed easily onto the wall frame.
  • installation is achieved by a click-in installation mechanism that cannot readily be disassembled without specialized tools, or is otherwise rendered relatively tamper resistant, as described herein below by way of example.
  • the form of interconnection between parts is designed such that, after a part is clicked-in into a joint, it can be removed only by using specific tools not typically accessible to passengers, such as screwdrivers for non-standard-head screws or other specialized tools.
  • the train bench seat strength and stiffness is obtained only after the bench seat parts are installed in place in the train car, which allow convenient transportation and installation of the bench seat parts on one hand, and strong and durable bench seat usage after installation in the train car on the other hand.
  • at least part of the structure preferably has an open profile which is closed by fastening the structure to the wall of the train carriage, thereby generating a more rigid resulting structure.
  • the seat structure can be viewed as a relatively thin layer ("skin” or "shell”) which is supported and made more rigid by a skeletal support structure, typically formed primarily from a sequence of vertical ribs. This construction lends itself to the use of an open profile for the "skin” component, which can then be compactly nested with other identical (or similar) components for compact packaging for shipping to the assembly location.
  • the parts of the bench seat are manufactured by cold press, including features defining various for interlocking engagement or other forms of connection between elements, such that no joining by welding or any other irreversible joining technique is needed prior to shipping, or during installation of the parts in the train car.
  • no pre-assembly of parts is required prior to shipping, such that the parts can come directly off the production line for packing into shipping containers with requiring an assembly line at the production facility.
  • the seats are preferably also modular in the sense that the various different components are identical and interchangeable between assembled seats, and parts of the bench seat can be easily swapped out and replaced by an unskilled person with the required simple tools.
  • the train bench seats are made of a metal part produced in cold press with no upholstery or pads and hence the train bench seats are durable and their maintenance is simple and inexpensive.
  • hot press may be used for manufacturing the metal bench seat parts.
  • plastic parts may be used.
  • any known material and process for manufacturing the train bench seat parts are in the scope of the present invention and may be used according to embodiments of the present invention.
  • FIG. 1 illustrates a 7 seat train bench, according to embodiments of the present invention. Attached to the train side wall 10, a 7 seat bench 100 is shown.
  • the metal parts of the bench seat (tin or stainless steel for example) are manufactured by cold press, including the click-in grooved joints, and no irreversible joining by welding or any other means are needed prior to the easy click-in or otherwise straight-forward mechanical engagement for installation of the parts in the train car.
  • Complementary inter-engaging of the bench seat parts allows easy installation of one part to the joint of a second part.
  • the assembly is rendered resistant to vandalism by use of assemblies which can only be opened by using non-standard tools supplied by the manufacturer, such as star-head bolts or the like.
  • the train bench seat strength and stiffness is obtained only after the cold press metal parts are installed in the train car connected to the train side wall, which allow convenient transportation and installation of the bench seat and strong and durable bench seat usage after installation.
  • the train side wall provides a stiff frame for the bench seat.
  • the bench seat composed of cold pressed metal parts strength and stiffness lean on the train side wall stiff frame.
  • FIG. 2 illustrates the wall frame of the 7 seat train bench, according to embodiments of the present invention.
  • the wall frame 102, 104, 106 is attached to the train side wall and preferably has features configured to receive connection of ribs 108, 110, typically in the form of inter-engaging slots and projections. Holes are provided to connect the wall frame to the train carriage wall with screws.
  • the wall frame lower beam 104 and upper beam 102 are shown here (FIG. 2) connected by vertical connecting elements 106, rendering the frame structurally well defined, such that the wall frame can be supplied together with the bench seat parts or may be part of the train car side wall construction.
  • vertical connecting elements 106 may be omitted, instead employing upper and lower beams 102 and 104 mounted directly to, or integrated as part of, the carriage wall.
  • lower horizontal member 104 may also be omitted.
  • support ribs 108, 110 are attached to the sole horizontal member and preferably additionally secured to the wall, such as by self-tapping screws or the like.
  • FIG. 3A the shaped ribs are typically subdivided into internal support ribs 108 and end-forming ribs 110.
  • a preferred example of a structure of internal support ribs 108 is shown more clearly in FIGS. 3B and 3C.
  • FIGS. 3B and 3C illustrate a center rib 108 of the 7 ⁇ seat train bench, according to embodiments of the present invention.
  • the center rib 108 inter-engages with features at corresponding locations of the wall frame, and is typically fixed with screws or bolts.
  • a lower plate 114 (FIGS.
  • the center rib 108 is preferably manufactured by a cold pressing process from sheet metal and preferably has a contoured shape with an indented portion 118 that gives extra strength to the rib.
  • FIGS. 6 and 8A-8B illustrate the upper sheet (“seat shell") 112 of the 7 seat train bench according to an embodiment of the present invention.
  • seat shell 112 is a single piece of metal produced by a cold pressing process from a blank of sheet metal material, and is preferably contoured to provide a comfortable shaped seat design with an individually defined sitting positions and a convex back support to provide lumbar support.
  • an upper edge of seat shell 112 is preferably formed with interlocking features configured to interlock with complementary features of horizontal support member 102.
  • seat shell 112 is formed with a series of spaced-apart hook elements 1.20 which are configured to engage corresponding slots 122 of upper horizontal member 102 (best seen in FIGS. 9A and 9B), typically connected via an arcuate insertion motion, so that seat shell 112 is effectively hung from horizontal support member 102 when deployed.
  • FIGS. 10- IOC An exemplary geometry of attachment of seat shell 112 to upper horizontal member 102 and of lower cover 114 to lower horizontal member 104 is further illustrated in the cut-away views of FIGS. 10- IOC.
  • a closure strip 124 typically of silicone rubber or another suitable resilient material, is deployed to conceal the upper engagement features and prevent collection of dirt or insertion of fingers into the hollow elements of the structure.
  • the various screws or bolts 126 (FIG. IOC), used here and throughout the structure to attach the various components, are chosen to have non-standard heads, thereby rendering them resistant to tampering and vandalism.
  • FIGS. 11A and 11B illustrate a preferred shipping configuration for the seating system of the present invention, deployed within a shipping container 124.
  • seat shells 112 are nested, thereby greatly reducing the shipping bulk for a given number of seat units.
  • benches of different lengths can be combined in a single shipping container, as exemplified here by a combination of 7 seat units (shells 112) and 2 seat units (shells 112a).
  • the structure described above can readily be scaled to units of any number of seats.
  • the various ribs and other components are also compactly stacked within the shipping container. It should be noted that lower covers 114 have been omitted from these drawings for clarity, but can readily be stored, close packed against each other, along one side of the container.
  • the horizontal member(s) may be provided to a party responsible for design or production of the wall, for inclusion as an integral part of the wall structure, hi such cases, the horizontal members or frame need not be shipped at all.
  • one or more container may be packed with all the seat shells and another with all the support ribs.
  • a single seat shell 112 extends for the full length of multi-person bench seat 100.
  • a plurality of seat shells 212 are used for a multi-person bench seat 200, with each shell extending along only a part of the length.
  • each seat shell 212 corresponds to a single seat of the multi-person bench seat 200.
  • the structure, assembly and mode of use of seat 200 is generally similar to that of seat 100 described above, and will be understood by analogy thereto. Equivalent elements are labeled similarly.
  • a number of seat shells 212 are nested densely in a shipping container, in contrast to prior art train bench seats that are assembled in production floors and are heavy pieces of furniture that require expensive transportation means.
  • the hook-and-slot joints described hereinabove are an example of joints that may be used in some embodiments of the present invention.
  • Other joints, such as screws, nuts and bolts and generally any type of joints may be used in embodiments of the present invention.
  • assembly does not entail any irreversible joining process, such as welding. By avoiding irreversible joining processes, modular replacement is facilitated of any part which becomes damaged without leading to damage to adjacent parts during disassembly and reassembly.
  • the present invention train bench seat parts are designed for convenient, effective and inexpensive packing, storing and transporting. Furthermore, the present invention train bench seat parts are designed for easy installation in the train cars and easy replacement of a part by any person. According to a particularly preferred option, no preassembly of parts is performed at. the manufacturing location(s). Instead, each component is shipped, typically compactly packaged or nested with other similar components, to the assembly location where the entire structure is assembled and fixed in position in a single procedure. This reduces the costs of the manufacturing process, and allows distributed manufacturing of the different components by different production processes (e.g., skins by cold press techniques, ribs by molding etc.), in different factories and at different locations according to the availability and costs of the production processes, raw materials and shipping.
  • different production processes e.g., skins by cold press techniques, ribs by molding etc.
  • seats according to the teachings of the present invention may be used to advantage for installation in a wide range of other contexts, particularly in passenger vehicles such as trains, road vehicles, ships and airplanes.
  • Embodiments of present invention bench seats are also envisaged for use in static structures, such as airport halls, train station halls, public building halls, theaters, streets, parks and boulevards and the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Special Chairs (AREA)

Abstract

Selon l'invention, une configuration d'expédition pour des sièges, particulièrement appropriés pour être utilisés dans le transport public, comprend un conteneur d'expédition contenant des ensembles de composants emballés pour l'assemblage de sièges montés sur une paroi. Chaque ensemble de composants comprend une coque de siège pour la fixation à une structure de support montée sur la paroi pour former un siège. Les coques de siège sont logées les unes dans les autres pour un stockage compact à l'intérieur du conteneur d'expédition. Les coques de siège sont de préférence des structures métalliques en feuille formées par pression. L'invention porte également sur un procédé d'assemblage de ces sièges, comprenant leurs structures de support, in situ.
PCT/IB2012/050581 2011-02-09 2012-02-09 Assise transportable de manière compacte pour assemblage sur site et procédés correspondants WO2012107894A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161440876P 2011-02-09 2011-02-09
US61/440,876 2011-02-09

Publications (1)

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WO2012107894A1 true WO2012107894A1 (fr) 2012-08-16

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103101550A (zh) * 2013-03-04 2013-05-15 南车南京浦镇车辆有限公司 整体式不锈钢座椅
CN103101551A (zh) * 2013-03-04 2013-05-15 南车南京浦镇车辆有限公司 地铁车辆乘客座椅安装工艺
JP2014108736A (ja) * 2012-12-03 2014-06-12 Japan Transport Engineering Co Ltd 片持ち式腰掛、片持ち式腰掛ユニット、治具、及び、片持ち式腰掛の取付方法。
FR3031333A1 (fr) * 2015-01-07 2016-07-08 Alstom Transp Tech Dispositif modulaire de support pour passagers, destine a equiper un vehicule de transport public
RU175290U1 (ru) * 2017-01-10 2017-11-29 Открытое акционерное общество "МЕТРОВАГОНМАШ" (ОАО "МЕТРОВАГОНМАШ") Сиденье для пассажиров транспортного средства
CN111071274A (zh) * 2018-10-19 2020-04-28 中车唐山机车车辆有限公司 用于轨道车辆的座椅结构及轨道车辆
JP7497283B2 (ja) 2020-12-09 2024-06-10 株式会社日立製作所 軌条車両及びその製造方法

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Publication number Priority date Publication date Assignee Title
US2711786A (en) * 1953-11-10 1955-06-28 Alexander C Weiss Combined bench and advertising device
US3328075A (en) * 1964-05-01 1967-06-27 Don C Albinson Base construction for furniture and utility chair
US3606944A (en) * 1969-06-09 1971-09-21 Robert T Cadillac Methods and means for packaging vehicles in land-sea containers
US3915493A (en) * 1974-11-21 1975-10-28 Gen Motors Corp Seat cushion retainer device
US5464273A (en) * 1991-07-15 1995-11-07 Kotobuki Seating Co. Ltd. Seat construction
US20100007163A1 (en) * 2008-06-04 2010-01-14 International Truck Intellectual Property Company, Llc Nested Seating Unit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2711786A (en) * 1953-11-10 1955-06-28 Alexander C Weiss Combined bench and advertising device
US3328075A (en) * 1964-05-01 1967-06-27 Don C Albinson Base construction for furniture and utility chair
US3606944A (en) * 1969-06-09 1971-09-21 Robert T Cadillac Methods and means for packaging vehicles in land-sea containers
US3915493A (en) * 1974-11-21 1975-10-28 Gen Motors Corp Seat cushion retainer device
US5464273A (en) * 1991-07-15 1995-11-07 Kotobuki Seating Co. Ltd. Seat construction
US20100007163A1 (en) * 2008-06-04 2010-01-14 International Truck Intellectual Property Company, Llc Nested Seating Unit

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014108736A (ja) * 2012-12-03 2014-06-12 Japan Transport Engineering Co Ltd 片持ち式腰掛、片持ち式腰掛ユニット、治具、及び、片持ち式腰掛の取付方法。
CN103101550A (zh) * 2013-03-04 2013-05-15 南车南京浦镇车辆有限公司 整体式不锈钢座椅
CN103101551A (zh) * 2013-03-04 2013-05-15 南车南京浦镇车辆有限公司 地铁车辆乘客座椅安装工艺
FR3031333A1 (fr) * 2015-01-07 2016-07-08 Alstom Transp Tech Dispositif modulaire de support pour passagers, destine a equiper un vehicule de transport public
EP3042820A1 (fr) * 2015-01-07 2016-07-13 ALSTOM Transport Technologies Dispositif modulaire de support pour passagers, destiné à équiper un véhicule de transport public
RU175290U1 (ru) * 2017-01-10 2017-11-29 Открытое акционерное общество "МЕТРОВАГОНМАШ" (ОАО "МЕТРОВАГОНМАШ") Сиденье для пассажиров транспортного средства
CN111071274A (zh) * 2018-10-19 2020-04-28 中车唐山机车车辆有限公司 用于轨道车辆的座椅结构及轨道车辆
JP7497283B2 (ja) 2020-12-09 2024-06-10 株式会社日立製作所 軌条車両及びその製造方法

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