WO2019215941A1 - 移動手摺製造方法 - Google Patents
移動手摺製造方法 Download PDFInfo
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- WO2019215941A1 WO2019215941A1 PCT/JP2018/038523 JP2018038523W WO2019215941A1 WO 2019215941 A1 WO2019215941 A1 WO 2019215941A1 JP 2018038523 W JP2018038523 W JP 2018038523W WO 2019215941 A1 WO2019215941 A1 WO 2019215941A1
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- moving handrail
- joint
- mold
- manufacturing
- end side
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B23/00—Component parts of escalators or moving walkways
- B66B23/22—Balustrades
- B66B23/24—Handrails
Definitions
- This invention relates to the manufacturing method of the moving handrail used for a passenger conveyor which uses a thermoplastic elastomer as a main raw material.
- moving handrails used for passenger conveyors such as escalators are mainly made of thermoplastic elastomer.
- the moving handrail is composed of a composite material formed by extruding a thermoplastic elastomer together with a cloth and a tensile body made of a steel cable or a metal plate.
- the moving handrail after being extruded is cut into a prescribed length, and then joined to both ends to form an annular shape, thereby forming a final product.
- a method for manufacturing the moving handrail a method has been proposed in which both ends are brought together so that the tensile bodies do not overlap, and they are put into a mold and bonded by thermally welding a thermoplastic elastomer (see, for example, Patent Document 1). ).
- the conventional joining method has a problem that bubbles and sink marks are generated at and around the joints at both ends of the moving handrail, and the design surface of the moving handrail becomes uneven, resulting in poor appearance.
- thermoplastic elastomer in the vicinity of the heat-welded joint and the cloth were not sufficiently joined, and the cloth was peeled off from the thermoplastic elastomer due to aging, and the moving handrail could not be used.
- the present invention has been made to solve the above-described problems, and can correct the appearance and internal defects of the moving handrail and improve the durability of the moving handrail.
- a moving handrail manufacturing method is obtained.
- the moving handrail manufacturing method heats the joint portion where one end side and the other end side of the moving handrail formed of a material including a cloth, a thermoplastic elastomer, and a tensile body are welded, and the periphery of the joint portion. And pressurizing.
- the present invention can correct the appearance of the moving handrail and the defects generated inside by heating and pressurizing the joining portion where the one end side and the other end side of the moving handrail are welded and the periphery of the joining portion.
- the durability of the moving handrail can be improved.
- FIG. 1 is a schematic diagram showing an example of an escalator device in which a moving handrail 1 manufactured using the moving handrail manufacturing method according to Embodiment 1 of the present invention is arranged.
- FIG. 2 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of a moving handrail 1 manufactured using the moving handrail manufacturing method in Embodiment 1 of the present invention and a guide 5 to which the moving handrail 1 is attached.
- the moving handrail 1 is formed in an annular shape, and is circulated and reversed at the entrances 2 and 3 of the escalator device.
- the moving handrail 1 includes a main body portion 10, a tensile body 20, and a cloth 30.
- the cross section of the main body 10 of the moving handrail 1 is formed in a C shape.
- the main body 10 has a design surface 10a formed on the front side and a guide surface 10b formed on the back side.
- the design surface 10a is a surface that the user of the escalator device touches.
- the cloth 10 is arranged on the surface of the guide surface 10b and slides along the guide 5 of the escalator device.
- the main body 10 is attached to the guide 5 so that the guide surface 10b covers the surface of the guide 5 of the escalator device.
- the main body 10 is composed of a single thermoplastic elastomer such as polyurethane, polystyrene, or polyolefin, or a thermoplastic elastomer in which two or more of these are mixed.
- the tensile body 20 is embedded in the main body 10 along the longitudinal direction of the moving handrail 1 in order to satisfy the tensile strength and bending strength required for the moving handrail 1.
- the tensile body 20 is composed of a metal plate or a plurality of steel cables.
- the cloth 30 is formed of a fiber such as cotton and linen, or a resin such as polyester so that the friction coefficient of the surface becomes low.
- the cloth 30 is attached to the guide surface 10b so as to cover the guide surface 10b of the main body 10.
- the cloth 30 attached to the guide surface 10 b is slid with respect to the surface of the guide 5.
- the formation process of the moving handrail 1 demonstrated here is an example, and does not specify the moving handrail manufacturing method of this invention.
- any process among conventionally known processes may be used.
- the tensile body 20 and the cloth 30 are arranged on an insert line of an unillustrated extruder.
- the tensile body 20 is disposed at a position where it is embedded in the thermoplastic elastomer.
- the cloth 30 is disposed on the surface on which the guide surface 10b is formed.
- thermoplastic elastomer is put into a mold of an extrusion molding machine, and the main body 10 is extruded together with the tensile body 20 and the cloth 30.
- the endless moving handrail 1 continuously formed is wound around the core for primary storage while being cooled by a medium such as water or air.
- the endless moving handrail 1 wound around the core for primary storage is cut to a length according to the specifications of the final product.
- the cut surface of the cut handrail 1 is the same as the cross section of the handrail 1 shown in FIG.
- FIG. 3 is a view showing one end side 1 a and the other end side 1 b of the processed moving handrail 1.
- molds the moving handrail 1 demonstrated here in an annular shape is an example, and does not specify the moving handrail manufacturing method of this invention.
- any step among conventionally known steps may be used.
- the guide surface 10 b side of the main body 10 extends from the end surface 1 aa on the one end side 1 a to the other end side 1 b in the range of the length L 1. Exclude until. Then, the joint surface 1ab is formed on the guide surface 10b side of the one end side 1a, and the joint surface 1ac perpendicular to the longitudinal direction of the moving handrail 1 is formed on the end portion of the other end side 1b of the joint surface 1ab.
- the design surface 10a side of the main body 10 is extended in the thickness direction of the tensile body 20 over the range of the length L1 from the end surface 1ba of the other end side 1b to the one end side 1a. Cut to the middle part.
- joining surface 1bb is formed in the design surface 10a side of the other end side 1b
- vertical to the longitudinal direction of the moving handrail 1 is formed in the edge part of the one end side 1a of joining surface 1bb.
- the joining surface 1ab on one end side 1a of the moving handrail 1 and the joining surface 1bb on the other end side 1b are overlapped and placed in a mold (not shown).
- one end side 1a and the other end side 1b of the moving handrail 1 in the mold are heated by a heating device (not shown). Then, the thermoplastic elastomer constituting each of the end surface 1aa and the joining surfaces 1ab and 1ac on the one end side 1a, the end surface 1ba on the other end side 1b and the joining surfaces 1bb and 1bc is melted.
- the end face 1ba of the side 1b is butted against each other and welded.
- the part which welded the one end side 1a and the other end side 1b of the moving handrail 1 is called the junction part 10c.
- the joint 10c of the moving handrail 1 and the mold are cooled in a state of being arranged in the mold.
- the moving handrail 1 is taken out from the mold.
- joining of the one end side 1a and the other end side 1b of the moving handrail 1 is completed, and the annular moving handrail 1 is formed.
- the process of the manufacturing method of the moving handrail in Embodiment 1 of this invention is implemented with respect to the moving handrail 1 formed in cyclic
- FIG. 4 is a partial perspective view, partly in section, showing an example of a problem that occurs in the moving handrail 1 manufactured without using the moving handrail manufacturing method according to the first embodiment of the present invention. 4 shows a cross section of the other end 1b when the joint 10c of the moving handrail 1 is cut at the position of the joining surface 1ac on the one end 1a shown in FIG.
- a cavity 40 and a cavity 41 as shown in FIG. 4 may be formed in the main body portion 10 and the design surface 10a of the joint portion 10c due to bubbles generated when the thermoplastic elastomer is melted. Bending stress is applied to the moving handrail 1 when it is attached to the escalator device and reversed. For this reason, when the cavity 40 or the cavity 41 exists, the main body 10 or the design surface 10a is cracked starting from the cavity 40 or the cavity 41, and the moving handrail 1 may be broken.
- sink marks 42 may occur on the design surface 10a of the moving handrail 1 as shown in FIG. 4 when each joint surface is welded and cooled.
- the cavity 41 and the sink mark 42 generated on the design surface 10a are treated as defective products because the appearance of the moving handrail 1 is impaired.
- the end surface 1aa of the one end side 1a of the joining part 10c and A gap 43 may be formed between the joint surface 1bc on the other end side 1b. Such a gap 43 causes the moving handrail 1 to break.
- the cloth 30 may not be in close contact with the guide surface 10b on the guide surface 10b of the moving handrail 1. If the cloth 30 is not in close contact with the guide surface 10b, the cloth 30 may float from the guide surface 10b as shown in FIG. When the gap 44 is generated between the cloth 30 and the guide surface 10b, the slidability between the guide surface 10b and the guide 5 of the escalator device is deteriorated, and the cloth 30 is peeled off from the guide surface 10b and is moved from the moving handrail 1. There is a risk of overhanging.
- the moving handrail manufacturing method of the present invention is performed on the joint 10c of the movable handrail 1 and the periphery of the joint 10c. Since the thermoplastic elastomer is thermoplastic, it can be remolded by heating and softening. The moving handrail manufacturing method of the present invention uses this property of the thermoplastic elastomer to correct the problem.
- FIG. 5 is an exploded perspective view of the mold 50.
- the mold 50 is composed of three members: an upper mold 51, a lower mold 52, and a center core 53.
- the upper mold 51 is formed in a shape along the design surface 10 a of the moving handrail 1.
- the lower mold 52 is formed in a shape along the surface opposite to the design surface 10 a of the moving handrail 1.
- the lower mold 52 is provided with an attachment surface 52a to which the core 53 is attached.
- the core 53 is formed in a shape along the guide surface 10b.
- the upper mold 51 and the lower mold 52 are all formed to have the same length L2 in the longitudinal direction.
- the length L2 in the longitudinal direction of the mold 50 is bonded in order to cover the entire portion where defects such as cavities 40 and 41, sink marks 42 and gaps 43 and 44 generated by welding of the handrail 1 are expected to occur. For example, it is formed larger by 50 mm or more on both sides than the length L1 of the portion 10c.
- Both ends of the upper mold 51 and the lower mold 52 in the longitudinal direction are tapered toward the outside of the mold 50 so that the edge mark of the mold 50 is not attached around the joint 10c of the moving handrail 1. It is formed in a shape.
- the length L3 of the core 53 is formed to be equal to or longer than the length L2 of the upper mold 51 and the lower mold 52 in order to stabilize the posture of the moving handrail 1 in the mold 50.
- the core 53 may be configured by assembling a plurality of parts, or may be integrally formed.
- the mold 50 includes a heating mechanism and a press mechanism (not shown).
- the heating mechanism is, for example, an electrothermal bar heater inserted into at least one of the upper mold 51 and the lower mold 52.
- the press mechanism pressurizes the movable handrail 1 by moving at least one of the upper mold 51 and the lower mold 52 forward and backward with respect to the other.
- the thermoplastic elastomer that forms the periphery of the joint 10c of the moving handrail 1 by the heating mechanism is such that viscosity appears in the thermoplastic elastomer that is not higher than the thermal decomposition temperature and near the glass transition temperature. Heat to temperature. Then, the moving handrail 1 is pressed along the shape of the moving handrail 1 by the mold 50. By pressurizing the thermoplastic elastomer heated to a temperature at which viscosity appears, defects such as the cavities 40 and 41 and the gap 43 generated in the previous process can be corrected.
- the mold 50 includes a cooling mechanism (not shown).
- the cooling mechanism is configured, for example, by providing a flow path of a coolant such as water or air inside at least one of the upper mold 51 and the lower mold 52.
- the cooling mechanism stabilizes the shape of the moving handrail 1 by lowering the temperature of the heated moving handrail 1 while holding the moving handrail 1 between the upper mold 51 and the lower mold 52. Thereby, malfunctions, such as the sink mark 42 which generate
- the temperature of the upper mold 51 and the lower mold 52 is raised to the vicinity of the glass transition temperature of the thermoplastic elastomer constituting the moving handrail 1 by a heating mechanism (not shown) provided in the mold 50.
- the core 53 may be heated at the same time as the upper mold 51 and the lower mold 52.
- the temperature may be increased by heat transmitted from the upper mold 51 and the lower mold 52 so that the cloth 30 of the moving handrail 1 does not burn.
- the core 53 is inserted into the guide surface 10b of the joined portion 10c of the joined moving handrail 1.
- the core 53 to which the movable handrail 1 is attached is disposed on the attachment surface 52 a of the lower mold 52.
- the movable handrail 1 and the center core 53 are sandwiched from above and below by the upper mold 51 and the lower mold 52.
- the joint 10c of the movable handrail 1 sandwiched between the upper mold 51 and the lower mold 52 and the periphery of the joint 10c are raised to a temperature at which viscosity appears in the thermoplastic elastomer constituting the movable handrail 1. Let warm. At this time, there is no gap between each of the upper mold 51, the center core 53, and the lower mold 52 and the moving handrail 1. If there is a gap, there is a possibility that an uneven shape is generated on the design surface 10a of the moving handrail 1 or the like.
- the upper mold 51 When the temperature is raised to a temperature at which viscosity appears in the joint 10c of the moving handrail 1 and the thermoplastic elastomer around the joint 10c, the upper mold 51 is further lowered to join the joint 10c and the joint of the moving handrail 1 Pressurize around 10c. Thereby, it is possible to correct defects such as the cavities 40 and 41, sink marks 42, and gaps 43 and 44 generated around the joint 10c and the joint 10c of the moving handrail 1.
- the upper mold 51, the lower mold 52, the core 53, and the moving handrail 1 are cooled by the cooling mechanism provided in the mold 50.
- the upper portion is replenished with the thermoplastic elastomer before the upper portion.
- the mold 51 and the lower mold 52 may be pressed and molded.
- molding it is good to remove a burr
- the upper mold 51 of the mold 50 is moved toward the lower mold 52 to pressurize the joint 10c and the periphery of the joint 10c of the moving handrail 1.
- the configuration of 50 is not limited to this.
- the lower mold 52 may be moved toward the upper mold 51, or both the upper mold 51 and the lower mold 52 may be moved.
- Embodiment 2 The moving handrail 1 used in the escalator is damaged by friction with a component that drives the moving handrail 1.
- the joint portion of the moving handrail 1 and the periphery of the joint portion are unlikely to be bent, damage due to friction is likely to occur.
- the surface of the moving handrail 1 is damaged by scratches, scrapes, etc. caused by the user's nails and luggage.
- the defect of the moving handrail 1 is corrected by repairing the damaged portion of the moving handrail 1 by using the same moving handrail manufacturing method as in the first embodiment.
- the moving handrail manufacturing method of the second embodiment is performed, for example, at the time of escalator maintenance.
- the moving handrail manufacturing method of the second embodiment first, the moving handrail 1 is removed from the guide. Next, the movable handrail 1 to be repaired is set in the mold 50. When damage has occurred at the joint of the moving handrail 1, the joint and the periphery of the joint are set in the mold 50. In the case where damage has occurred in a portion other than the joint portion of the moving handrail 1, the damaged portion is set at the center of the mold 50.
- thermoplastic elastomer is replenished to the insufficient portion and heated and pressurized.
- the damaged portion of the moving handrail 1 is repaired by heating and pressing the damaged portion of the moving handrail 1 used in the escalator. be able to.
- the moving handrail 1 used in the escalator in operation is deformed over time. Thereby, the clearance gap between the moving handrail 1 and the guide 5 increases. Then, the force with which the moving handrail 1 grips the guide 5 is reduced, and problems such as vibration and abnormal noise occur in the moving handrail 1. If the gap between the moving handrail 1 and the guide 5 is further increased, the moving handrail 1 may be detached from the guide 5 and fall off.
- the moving handrail 1 thus deformed can be corrected by the moving handrail manufacturing method of the second embodiment. That is, the deformed portion of the moving handrail 1 is heated using the heating mechanism of the mold 50. Then, the thermoplastic elastomer of the moving handrail 1 is softened and penetrated into the cloth 30. Further, the deformed portion of the moving handrail 1 is pressurized and repaired using the press mechanism of the mold 50. Thereby, the force with which the moving handrail 1 grips the guide 5 can be restored. Therefore, the durability of the moving handrail 1 can be improved and the life of the moving handrail 1 can be extended.
- 1 moving handrail 1a one end side, 1b other end side, 1aa, 1ba end surface, 1ab, 1ac, 1bb, 1bc joint surface, 2,3 entrance / exit, 5, guide, 10 main body, 10a design surface, 10b guide surface, 10c Joint, 20 tensile body, 30 cloth, 40, 41 cavity, 42 sink, 43, 44 gap, 50 mold, 51 upper mold, 52 lower mold, 52a mounting surface, 53 core.
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- Escalators And Moving Walkways (AREA)
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Abstract
Description
図1は、本発明の実施の形態1における移動手摺製造方法を用いて製造される移動手摺1が配置されるエスカレータ装置の例を示す概略図である。図2は、本発明の実施の形態1における移動手摺製造方法を用いて製造される移動手摺1と、移動手摺1が取り付けられるガイド5の、長手方向に直交する断面を示す断面図である。
水、空気などの冷媒の流路を設けることによって構成される。冷却機構は、上部金型51と下部金型52との間に移動手摺1を保持した状態で、加熱された移動手摺1の温度を下げて移動手摺1の形状を安定させる。これにより、前工程で移動手摺1の意匠面10aに発生したヒケ42などの不具合を修正することができる。また、冷却機構を備えることによって、移動手摺1の冷却に要する時間を短縮することができる。
エスカレータで使用されている移動手摺1には、移動手摺1を駆動する部品との間の摩擦によって損傷が発生する。特に、移動手摺1の接合部及び接合部周辺は曲がりにくいため、摩擦による損傷が発生しやすい。また、移動手摺1の表面には、利用者の爪、荷物などによる引っ掻き傷、削れなどの損傷が発生する。実施の形態2では、実施の形態1と同様の移動手摺製造方法を用いて、移動手摺1の損傷が発生している部分を補修することにより、移動手摺1の不具合を修正する。実施の形態2の移動手摺製造方法は、例えばエスカレータのメンテナンス時に行われる。
次に、補修を行う移動手摺1を金型50にセットする。移動手摺1の接合部に損傷が発生している場合には、接合部及び接合部周辺を金型50にセットする。移動手摺1の接合部以外の部分に損傷が発生している場合には、損傷が発生している部分を金型50の中心にセットする。
なお、移動手摺1の表面が削れて熱可塑性エラストマーが不足している場合には、不足部分に熱可塑性エラストマーを補充して加熱及び加圧する。
Claims (9)
- 布、熱可塑性エラストマー、抗張体を含む材料によって形成される移動手摺の、一端側と他端側とが溶着された接合部及び前記接合部の周辺を加熱するとともに加圧する工程を有する、
移動手摺製造方法。 - 前記加熱するとともに加圧する工程は、
前記接合部及び前記接合部の周辺を、前記移動手摺の形状に沿う金型の中に配置する工程と、
前記接合部及び前記接合部の周辺の温度を、前記熱可塑性エラストマーの熱分解温度以下でかつ前記熱可塑性エラストマーのガラス転移温度近傍であって、前記熱可塑性エラストマーに粘性が現れる程度の温度まで加熱する工程と、
前記接合部及び前記接合部の周辺を加圧する工程と
前記接合部及び前記接合部の周辺を前記金型の中に配置した状態で、前記接合部及び前記接合部の周辺の温度を、前記熱可塑性エラストマーが硬化する温度または室温まで冷却する工程とを有する、
請求項1に記載の移動手摺製造方法。 - 前記加熱するとともに加圧する工程は、
上部金型と、下部金型と、前記上部金型と前記下部金型との間に配置される中芯とによって構成される前記金型に前記接合部及び前記接合部の周辺を配置する工程を有し、
前記金型に前記接合部及び前記接合部の周辺を配置する工程は、
前記中芯の表面に、前記接合部及び前記接合部の周辺に配置される前記布を密着させる工程を有する、
請求項2に記載の移動手摺製造方法。 - 前記上部金型の前記移動手摺の長手方向に沿う方向の長さは、前記下部金型の前記移動手摺の長手方向に沿う方向の長さと同一である、
請求項3に記載の移動手摺製造方法。 - 前記中芯の前記移動手摺の長手方向に沿う方向の長さは、前記上部金型及び前記下部金型の前記移動手摺の長手方向に沿う方向の長さ以上であり、
前記中芯は、前記上部金型と前記下部金型との間で前記接合部及び前記接合部の周辺を直線状に固定する、
請求項3または請求項4に記載の移動手摺製造方法。 - 前記金型は加圧機構を備え、
前記加圧機構は、
前記接合部及び前記接合部の両端部から前記移動手摺の前記一端側及び前記他端側に50mm以上延出する範囲を加圧する、
請求項3から請求項5のいずれか1項に記載の移動手摺製造方法。 - 前記加圧機構は、
前記上部金型及び前記下部金型の少なくとも一方を他方に向けて移動させることによって前記移動手摺を加圧する、
請求項6に記載の移動手摺製造方法。 - 前記上部金型及び前記下部金型のうち少なくとも一方は加熱機構を備える、
請求項3から請求項7のいずれか1項に記載の移動手摺製造方法。 - 前記上部金型及び前記下部金型のうち少なくとも一方は冷却機構を備える、
請求項3から請求項8のいずれか1項に記載の移動手摺製造方法。
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CA3099467A CA3099467C (en) | 2018-05-09 | 2018-10-16 | Moving handrail manufacturing method |
CN201880093009.8A CN112135725B (zh) | 2018-05-09 | 2018-10-16 | 移动扶手制造方法和移动扶手的修补方法 |
JP2020517757A JP6918223B2 (ja) | 2018-05-09 | 2018-10-16 | 移動手摺製造方法 |
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Cited By (1)
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WO2022044744A1 (ja) * | 2020-08-24 | 2022-03-03 | 三菱電機株式会社 | 手摺ベルト、乗客コンベアの移動手摺及び乗客コンベアの移動手摺の製造方法 |
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WO2015182739A1 (ja) * | 2014-05-30 | 2015-12-03 | 三菱電機株式会社 | エンドレス手摺の製造方法、エンドレス手摺およびエスカレーター |
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WO2022044744A1 (ja) * | 2020-08-24 | 2022-03-03 | 三菱電機株式会社 | 手摺ベルト、乗客コンベアの移動手摺及び乗客コンベアの移動手摺の製造方法 |
JP7409516B2 (ja) | 2020-08-24 | 2024-01-09 | 三菱電機株式会社 | 乗客コンベアの移動手摺の製造方法 |
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