CA3099467A1 - Moving handrail manufacturing method - Google Patents
Moving handrail manufacturing method Download PDFInfo
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- CA3099467A1 CA3099467A1 CA3099467A CA3099467A CA3099467A1 CA 3099467 A1 CA3099467 A1 CA 3099467A1 CA 3099467 A CA3099467 A CA 3099467A CA 3099467 A CA3099467 A CA 3099467A CA 3099467 A1 CA3099467 A1 CA 3099467A1
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- Prior art keywords
- moving handrail
- joining portion
- mold
- periphery
- manufacturing
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Classifications
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Escalators And Moving Walkways (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
This moving handrail production method has a step for applying heat and applying pressure to a joint and an area surrounding the joint, said joint being where one end side and another end side of a moving hand rail, which is formed from a material comprising a fabric, a thermoplastic elastomer and a tensile body, are welded together. Thus, in addition to correcting defects occurring in the external appearance and an inner portion of the moving handrail, the durability of the moving handrail can be improved.
Description
Description Title of Invention: MOVING HANDRAIL MANUFACTURING METHOD
Technical Field [0001] The present invention relates to a method of manufacturing a moving handrail which is formed of thermoplastic elastomer as a main raw material, and is to be used in a passenger conveyor.
Background Art
Technical Field [0001] The present invention relates to a method of manufacturing a moving handrail which is formed of thermoplastic elastomer as a main raw material, and is to be used in a passenger conveyor.
Background Art
[0002]
Hitherto, a moving handrail to be used in a passenger conveyor such as an escalator is formed of thermoplastic elastomer as a main raw material. The moving handrail is formed of a composite material formed through extrusion molding of thermoplastic elastomer together with a cloth and a tensile body, which is formed of steel cables or a metal plate. The moving handrail having been subjected to extrusion molding is cut to a prescribed length, and then, both end portions of the cut moving handrail are joined to each other to be formed into an annular shape, thereby obtaining a final product. As a method of manufacturing a moving handrail, there has been proposed a method of joining both end portions of the moving handrail to each other by butting both the end portions against each other while preventing overlapping of a tensile body, pouring thermoplastic elastomer into a mold, and thermally welding the thermoplastic Date Recue/Date Received 2020-11-05 elastomer (see, for example, Patent Literature 1).
Citation List Patent Literature
Hitherto, a moving handrail to be used in a passenger conveyor such as an escalator is formed of thermoplastic elastomer as a main raw material. The moving handrail is formed of a composite material formed through extrusion molding of thermoplastic elastomer together with a cloth and a tensile body, which is formed of steel cables or a metal plate. The moving handrail having been subjected to extrusion molding is cut to a prescribed length, and then, both end portions of the cut moving handrail are joined to each other to be formed into an annular shape, thereby obtaining a final product. As a method of manufacturing a moving handrail, there has been proposed a method of joining both end portions of the moving handrail to each other by butting both the end portions against each other while preventing overlapping of a tensile body, pouring thermoplastic elastomer into a mold, and thermally welding the thermoplastic Date Recue/Date Received 2020-11-05 elastomer (see, for example, Patent Literature 1).
Citation List Patent Literature
[0003] [PTL 1] JP 4937215 B2 Summary of Invention Technical Problem
[0004] However, in the related-art joining method, there is a problem in that air bubbles, a sink mark, and the like are formed in a joining portion of both the end portions of the moving handrail and a periphery of the joining portion, and irregularities are formed on a design surface of the moving handrail, resulting in poor appearance.
[0005] Further, there is a problem in that the thermoplastic elastomer in the vicinity of the thermally welded joining portion and a cloth are not sufficiently joined to each other, and hence the cloth is peeled off from the thermoplastic elastomer due to aging degradation, with the result that the moving handrail is not durable.
[0006] The present invention has been made in order to solve the above-mentioned problems, and obtains a moving handrail manufacturing method capable of improving the durability of a moving handrail as well as being capable of correcting defects caused in the appearance and the inside of the moving handrail.
Date Recue/Date Received 2020-11-05 Solution to Problem
Date Recue/Date Received 2020-11-05 Solution to Problem
[0007]
According to one embodiment of the present invention, there is provided a moving handrail manufacturing method, including a step of heating and pressurizing a joining portion and a periphery of the joining portion, the joining portion being a portion in which one end side and another end side of a moving handrail formed of a material including a cloth, thermoplastic elastomer, and a tensile body are welded to each other.
Advantageous Effects of Invention
According to one embodiment of the present invention, there is provided a moving handrail manufacturing method, including a step of heating and pressurizing a joining portion and a periphery of the joining portion, the joining portion being a portion in which one end side and another end side of a moving handrail formed of a material including a cloth, thermoplastic elastomer, and a tensile body are welded to each other.
Advantageous Effects of Invention
[0008]
According to the present invention, the joining portion in which the one end side and the another end side of the moving handrail are welded to each other, and the periphery of the joining portion are heated and pressurized. Thus, the defects caused in the appearance and the inside of the moving handrail can be corrected, and the durability of the moving handrail can be improved.
Brief Description of Drawings
According to the present invention, the joining portion in which the one end side and the another end side of the moving handrail are welded to each other, and the periphery of the joining portion are heated and pressurized. Thus, the defects caused in the appearance and the inside of the moving handrail can be corrected, and the durability of the moving handrail can be improved.
Brief Description of Drawings
[0009] FIG. I
is a schematic view for illustrating an example of an escalator device in which a moving handrail manufactured using a moving handrail manufacturing method according to a first embodiment of the present invention is arranged.
Date Recue/Date Received 2020-11-05 FIG. 2 is a sectional view for illustrating the moving handrail manufactured using the moving handrail manufacturing method according to the first embodiment of the present invention in cross section orthogonal to a longitudinal direction.
FIG. 3 is a partial perspective view for illustrating a preceding step of the moving handrail manufactured using the moving handrail manufacturing method according to the first embodiment of the present invention in partial cross section.
FIG. 4 is a partial perspective view for illustrating an example of defects caused in a moving handrail manufactured without using the moving handrail manufacturing method according to the first embodiment of the present invention in partial cross section.
FIG. 5 is an exploded perspective view for illustrating a mold to be used in the moving handrail manufacturing method according to the first embodiment of the present invention.
FIG. 6A is a schematic view for illustrating a first step of the moving handrail manufacturing method according to the first embodiment of the present invention in partial cross section.
FIG. 6B is a schematic view for illustrating a second step of the moving handrail manufacturing method according to the first embodiment of the present invention in partial cross section.
FIG. 6C is a schematic view for illustrating a third step Date Recue/Date Received 2020-11-05 of the moving handrail manufacturing method according to the first embodiment of the present invention in partial cross section.
FIG. 6D is a schematic view for illustrating a fourth step of the moving handrail manufacturing method according to the first embodiment of the present invention in partial cross section.
Description of Embodiments [0011] Now, description is made of a moving handrail manufacturing method according to an exemplary embodiment of the present invention with reference to the drawings.
[0011] First Embodiment FIG. 1 is a schematic view for illustrating an example of an escalator device in which a moving handrail 1 manufactured using a moving handrail manufacturing method according to a first embodiment of the present invention is arranged. FIG. 2 is a sectional view for illustrating the moving handrail 1 manufactured using the moving handrail manufacturing method according to the first embodiment of the present invention and a guide 5 to which the moving handrail 1 is mounted in cross section orthogonal to a longitudinal direction.
[0012] As illustrated in FIG. 1, the moving handrail 1 has an annular shape, and is circulated and moved by being inverted Date Recue/Date Received 2020-11-05 at landings 2 and 3 of the escalator device. Further, as illustrated in FIG. 2, the moving handrail 1 includes a main body portion 10, a tensile body 20, and a cloth 30.
[0013] As illustrated in FIG. 2, the main body portion 10 of the moving handrail 1 has a C shape in cross section. The main body portion 10 has a design surface 10a formed on a front side and a guide surface 10b formed on a back side. The design surface 10a is a surface to be touched by a user of the escalator device by hand. The guide surface 10b has the cloth 30 arranged on a surface thereof and slides along the guide 5 of the escalator device.
[0014] The main body portion 10 is mounted to the guide 5 such that the guide surface 10b covers a surface of the guide 5 of the escalator device. The main body portion 10 is formed of single thermoplastic elastomer such as polyurethane, polystyrene, or polyolefin elastomer, or thermoplastic elastomer containing two or more of the single elastomers mixed therein.
[0015] The tensile body 20 is embedded in the main body portion 10 along the longitudinal direction of the moving handrail 1 in order to satisfy the tensile strength and the bending strength required for the moving handrail 1. The tensile body 20 is formed of a metal plate or a plurality of steel cables.
[0016] The cloth 30 is formed of fiber such as cotton or linen or resin such as polyester such that the friction coefficient of the surface becomes lower. The cloth 30 is Date Recue/Date Received 2020-11-05 mounted to the guide surface 10b of the main body portion 10 so as to cover the guide surface 10b. The cloth 30 mounted to the guide surface 10b is slid relative to the surface of the guide 5.
[0017] Next, a step of molding the moving handrail 1 configured as described above is described. The molding step for the moving handrail 1 described here is an example, and does not specify the moving handrail manufacturing method of the present invention. As the step of molding the moving handrail 1, any of the steps that have hitherto been known may be used.
[0018] First, the tensile body 20 and the cloth 30 are arranged on an insert line of an extrusion molding machine (not shown). The tensile body 20 is arranged at a position at which the tensile body 20 is to be embedded in the thermoplastic elastomer. The cloth 30 is arranged on a surface on which the guide surface 10b is to be formed.
[0019] Next, the thermoplastic elastomer is poured into a mold of the extrusion molding machine, and the main body portion is subjected to extrusion molding together with the tensile body 20 and the cloth 30. Next, the endless moving handrail 1 that is continuously formed is wound around a core body for primary storage while being cooled by a medium such as water or air.
[0020] Next, the endless moving handrail 1 wound around the core body for primary storage is cut to a length corresponding Date Recue/Date Received 2020-11-05 to the specification of a final product. The cut surface of the cut moving handrail 1 is similar to the cross section of the moving handrail 1 illustrated in FIG. 2.
[0021] Next, a step of molding the cut moving handrail 1 into an annular shape is described with reference to FIG. 3.
FIG. 3 is a view for illustrating one end side la and another end side lb of the processed moving handrail 1. The step of molding the moving handrail 1 into an annular shape described here is an example, and does not specify the moving handrail manufacturing method of the present invention. As the step of molding the moving handrail 1 into an annular shape, any of the steps that have hitherto been known may be used.
[0022] First, on the one end side la of the moving handrail 1, the guide surface 10b side of the main body portion 10 is cut to an intermediate portion in a thickness direction of the tensile body 20 in a range of the length Li from an end surface laa of the one end side la toward the another end side lb. Then, a joining surface lab is formed on the guide surface 10b side of the one end side la, and a joining surface lac, which is perpendicular to the longitudinal direction of the moving handrail 1, is formed on an end portion of the joining surface lab on the another end side lb.
[0023] Next, on the another end side lb of the moving handrail 1, the design surface 10a side of the main body portion is cut to an intermediate portion in the thickness direction Date Recue/Date Received 2020-11-05 of the tensile body 20 in a range of the length Li from an end surface lba of the another end side lb toward the one end side la. Then, a joining surface lbb is formed on the design surface 10a side of the another end side lb, and a joining surface lbc, which is perpendicular to the longitudinal direction of the moving handrail 1, is formed on an end portion of the joining surface lbb on the one end side la.
[0024] Next, as illustrated in FIG. 3, the joining surface lab on the one end side la of the moving handrail 1 and the joining surface lbb on the another end side lb are overlaid on each other, and the moving handrail 1 is arranged in a mold (not shown).
[0025] Next, the one end side la and the another end side lb of the moving handrail 1 in the mold are heated by a heating device (not shown). Then, the thermoplastic elastomer forming the end surface laa and the joining surfaces lab and lac on the one end side la and the end surface lba and the joining surfaces lbb and lbc on the another end side lb is melted.
[0026] Next, the end surface laa on the one end side la and the joining surface lbc on the another end side lb, the joining surface lab on the one end side la and the joining surface lbb on the another end side lb, and the joining surface lac on the one end side la and the end surface lba on the another end side lb are butted against each other and welded to each other, respectively. A portion in which the one end side la and the Date Recue/Date Received 2020-11-05 another end side lb of the moving handrail 1 are welded to each other is hereinafter referred to as a joining portion 10c.
[0027] Next, the joining portion 10c of the moving handrail 1 and the mold are cooled under a state in which the moving handrail 1 is arranged in the mold. Next, the moving handrail 1 is taken out from the mold. Thus, the joining of the one end side la and the another end side lb of the moving handrail 1 is completed, thereby forming the moving handrail 1 having an annular shape. After that, steps in the moving handrail manufacturing method according to the first embodiment of the present invention are performed on the moving handrail 1 having an annular shape.
[0028] Here, defects caused in the main body portion 10 of the moving handrail 1 and the design surface 10a by the related-art moving handrail manufacturing method are described.
[0029] FIG. 4 is a partial perspective view for illustrating an example of defects caused in a moving handrail 1 manufactured without using the moving handrail manufacturing method according to the first embodiment of the present invention in partial cross section. FIG. 4 is an illustration of the joining portion 10c of the moving handrail 1 in a cross section of the another end side lb cut at a position of the joining surface lac on the one end side la illustrated in FIG. 3.
[0030] In the main body portion 10 and the design surface 10a in the joining portion 10c, a cavity 40 and a cavity 41 as Date Recue/Date Received 2020-11-05 illustrated in FIG. 4 may be formed by air bubbles generated when the thermoplastic elastomer is melted. The moving handrail 1 is subjected to bending stress when the moving handrail 1 is mounted to the escalator device and is inverted. Therefore, when the cavity 40 or the cavity 41 is present, a crack may be formed in the main body portion 10 or the design surface 10a from the cavity 40 or the cavity 41 as a starting point, with the result that the moving handrail 1 may be broken.
[0031] Further, when the joining surfaces are welded to each other and cooled, a sink mark 42 may be formed in the design surface 10a of the moving handrail 1 as illustrated in FIG. 4.
The cavity 41 and the sink mark 42 formed in the design surface 10a impair the appearance of the moving handrail 1, and hence the moving handrail 1 is treated as a defective product.
[0032] Further, when the welding between the one end side la and the another end side lb of the moving handrail 1 is insufficient in the joining portion 10c, as illustrated in FIG.
4, a gap 43 may be formed between the end surface laa on the one end side la and the joining surface lbc on the another end side lb in the joining portion 10c. Such a gap 43 causes breakage of the moving handrail 1.
[0033] Further, in the guide surface 10b of the moving handrail 1, the cloth 30 is not in close contact with the guide surface 10b in some cases. When the cloth 30 is not in close contact with the guide surface 10b, as illustrated in FIG. 4, Date Recue/Date Received 2020-11-05 the cloth 30 may be separated from the guide surface 10b to form a gap 44. When the gap 44 is formed between the cloth 30 and the guide surface 10b, there is a fear in that the slidability between the guide surface 10b and the guide 5 of the escalator device is lowered, and the cloth 30 peels off from the guide surface 10b to protrude from the moving handrail 1.
[0034] In order to correct such defects, the steps in the moving handrail manufacturing method of the present invention are performed on the joining portion 10c of the moving handrail 1 and the periphery of the joining portion 10c. The thermoplastic elastomer is thermoplastic, and hence can be re-molded by heating and softening. The moving handrail manufacturing method of the present invention utilizes such a property of the thermoplastic elastomer to correct the defects.
[0035] In the following, a mold 50 to be used in the moving handrail manufacturing method according to the first embodiment of the present invention and the steps in the moving handrail manufacturing method are described.
[0036] First, the mold 50 to be used in the moving handrail manufacturing method is described. FIG. 5 is an exploded perspective view of the mold 50. The mold 50 is formed of three members including an upper mold 51, a lower mold 52, and a middle core 53.
[0037] The upper mold 51 has a shape conforming to the design surface 10a of the moving handrail 1. The lower mold 52 Date Recue/Date Received 2020-11-05 has a shape conforming to a surface on a side opposite to the design surface 10a of the moving handrail 1. Further, the lower mold 52 has a mounting surface 52a to which the middle core 53 is to be mounted. The middle core 53 has a shape conforming to the guide surface 10b.
[0038] The dimensions of the upper mold 51 and the lower mold 52 in the longitudinal direction are all set to the same length L2. The length L2 of the mold 50 in the longitudinal direction is set larger than the length Li of the joining portion 10c by, for example, 50 mm or more to both sides so as to cover the entire part in which defects such as the cavities 40 and 41, the sink mark 42, and the gaps 43 and 44 due to the welding of the moving handrail 1 are expected to be caused.
[0039] Both end portions of each of the upper mold 51 and the lower mold 52 in the longitudinal direction have a tapered shape expanding toward the outside of the mold 50 so as to prevent an edge mark of the mold 50 from being formed in the periphery of the joining portion 10c of the moving handrail 1.
[0040] The length L3 of the middle core 53 is set to be equal to or larger 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 middle core 53 may be formed by assembling the plurality of components or formed integrally.
[0041] The mold 50 includes a heating mechanism and a press mechanism (not shown).
Date Recue/Date Received 2020-11-05 [0042] The heating mechanism is, for example, an electric rod heater to be inserted into at least one of the upper mold 51 and the lower mold 52. The press mechanism pressurizes the moving handrail 1 by advancing or retreating at least one of the upper mold 51 and the lower mold 52 relative to another one of the upper mold 51 and the lower mold 52.
[0043] In the moving handrail manufacturing method of the present invention, the thermoplastic elastomer forming the periphery of the joining portion 10c of the moving handrail 1 is heated by the heating mechanism to a temperature equal to or less than a thermal decomposition temperature and close to a glass transition temperature, around which temperature the viscosity appears in the thermoplastic elastomer. Then, the moving handrail 1 is pressurized by the mold 50 along the shape of the moving handrail 1. The thermoplastic elastomer heated to the temperature around which the viscosity appears is pressurized so that defects such as the cavities 40 and 41 and the gap 43 caused in the preceding step can be corrected.
[0044] Further, the mold 50 includes a cooling mechanism (not shown).
[0045] The cooling mechanism is formed by, for example, providing a flow passage for a refrigerant such as water or air in at least one of the upper mold 51 and the lower mold 52. The cooling mechanism lowers the temperature of the heated moving handrail 1 under a state in which the moving handrail 1 is held Date Recue/Date Received 2020-11-05 between the upper mold 51 and the lower mold 52, thereby stabilizing the shape of the moving handrail 1. With this, the defects such as the sink mark 42 formed in the design surface 10a of the moving handrail 1 in the preceding step can be corrected. Further, the cooling mechanism is provided so that the time required for cooling the moving handrail 1 can be shortened.
[0046] Next, the steps in the moving handrail manufacturing method according to the first embodiment using the mold 50 are described with reference to FIG. 6A to FIG. 6D.
[0047] First, the temperatures of the upper mold 51 and the lower mold 52 are raised to a temperature close to the glass transition temperature of the thermoplastic elastomer forming the moving handrail 1 by the heating mechanism (not shown) of the mold 50. The temperature of the middle core 53 may be raised at the same time as the upper mold 51 and the lower mold 52. It is preferred that the temperature of the middle core 53 be raised by heat transferred from the upper mold 51 and the lower mold 52 in order to prevent the cloth 30 of the moving handrail 1 from being burnt.
[0048] Next, as illustrated in FIG. 6A, the middle core 53 is inserted through the guide surface 10b in the joining portion 10c of the joined moving handrail 1. Next, as illustrated in FIG. 6B, the middle core 53 to which the moving handrail 1 is Date Recue/Date Received 2020-11-05 mounted is arranged on the mounting surface 52a of the lower mold 52.
[0049] Next, as illustrated in FIG. 6C, the upper mold 51 is moved toward the lower mold 52.
[0050] Next, as illustrated in FIG. 6D, the moving handrail 1 and the middle core 53 are sandwiched by the upper mold 51 and the lower mold 52 in an up-and-down direction.
[0051] Next, the temperatures of the joining portion 10c of the moving handrail 1 sandwiched by the upper mold 51 and the lower mold 52 and the periphery of the joining portion 10c are raised to the temperature around which the viscosity appears in the thermoplastic elastomer forming the moving handrail 1. At this time, a gap is prevented from being formed between each of the upper mold 51, the middle core 53, and the lower mold 52 and the moving handrail 1. When a gap is formed, there is a fear in that an irregular shape is formed in the design surface 10a of the moving handrail 1.
[0052] When the temperatures of the joining portion 10c of the moving handrail 1 and the periphery of the joining portion 10c are raised to the temperature around which the viscosity appears in the thermoplastic elastomer, the upper mold 51 is further lowered, and the joining portion 10c of the moving handrail 1 and the periphery of the joining portion 10c are pressurized. With this, the defects such as the cavities 40 and 41, the sink mark 42, and the gaps 43 and 44 caused in the Date Recue/Date Received 2020-11-05 joining portion 10c of the moving handrail 1 and the periphery of the joining portion 10c can be corrected.
[0053] Next, the upper mold 51, the lower mold 52, the middle core 53, and the moving handrail 1 are cooled by the cooling mechanism provided to the mold 50.
[0054] After the joining portion 10c of the moving handrail 1 and the periphery of the joining portion 10c are cooled to a temperature at which the shape is stabilized, the upper mold 51 is raised to be separated from the lower mold 52. Next, the middle core 53 to which the moving handrail 1 is mounted is removed from the lower mold 52. Next, the middle core 53 is removed from the moving handrail 1. With this, the steps in the moving handrail manufacturing method according to the first embodiment are completed.
[0055] In the preceding step of the moving handrail manufacturing method according to the first embodiment, when there is a portion in which the thermoplastic elastomer is insufficient on the surface of the moving handrail 1, it is preferred that the thermoplastic elastomer be replenished in the insufficient portion, and then the moving handrail 1 be pressurized by the upper mold 51 and the lower mold 52 so as to be molded. Further, when a burr or the like is formed on the surface of the moving handrail 1 after the molding, it is preferred that the burr be removed by a cutter or the like.
[0056] As described above, the moving handrail Date Recue/Date Received 2020-11-05 manufacturing method according to the first embodiment includes the step of reheating and pressurizing the joining portion 10c of the moving handrail 1, which is formed into an annular shape by joining one end side and another end side of a long composite material including the cloth 30, the main body portion 10 formed of the thermoplastic elastomer, and the tensile body 20, and the periphery of the joining portion 10c. With this, defects such as the cavity 41, the sink mark 42, and the gap 43 caused in the design surface 10a of the moving handrail 1 can be corrected.
Further, defects such as the cavity 40 and the gap 44 caused inside the main body portion 10 of the moving handrail 1 are corrected so that the durability of the moving handrail 1 can be improved.
[0057] In the first embodiment, the upper mold 51 of the mold 50 is moved toward the lower mold 52 to pressurize the joining portion 10c of the moving handrail 1 and the periphery of the joining portion 10c. However, the configuration of the mold 50 is not limited thereto. For example, 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.
[0058] Second Embodiment The moving handrail 1 used in the escalator is damaged by friction with a component that drives the moving handrail 1. In particular, the joining portion of the moving handrail 1 and the periphery of the joining portion are less liable to be bent, and Date Recue/Date Received 2020-11-05 hence are more liable to be damaged by the friction. Further, damage such as scratches or scrapes is caused on the surface of the moving handrail 1 by nails of a user, baggage, and the like.
In the second embodiment, the damaged portion of the moving handrail 1 is repaired using the moving handrail manufacturing method similar to that of the first embodiment so that the defects of the moving handrail 1 are corrected. The moving handrail manufacturing method according to the second embodiment is performed, for example, at the time of maintenance of the escalator.
[0059] In the moving handrail manufacturing method according to the second embodiment, first, the moving handrail 1 is removed from the guide.
Next, the moving handrail 1 to be repaired is set in the mold 50. When the joining portion of the moving handrail 1 is damaged, the joining portion and the periphery of the joining portion are set in the mold 50. When a portion of the moving handrail 1 other than the joining portion is damaged, the damaged portion is set at the center of the mold 50.
[0060] The subsequent steps are similar to the steps in the moving handrail manufacturing method according to the first embodiment.
When the surface of the moving handrail 1 is scraped, and the thermoplastic elastomer is insufficient, the thermoplastic elastomer is replenished in the insufficient portion, and the Date Recue/Date Received 2020-11-05 portion is heated and pressurized.
[0061] As described above, in the moving handrail manufacturing method according to the second embodiment, the damaged portion in the moving handrail 1 used in the escalator is heated and pressurized so that the damage of the moving handrail 1 can be repaired.
[0062] The moving handrail 1 used in the escalator being operated is deformed with time. With this, the gap between the moving handrail 1 and the guide 5 becomes larger. As a result, the force for gripping the guide 5 by the moving handrail 1 is lowered, and defects such as vibration and abnormal sound are caused in the moving handrail 1. When the gap between the moving handrail 1 and the guide 5 further becomes larger, there is a fear in that the moving handrail 1 comes off from the guide 5.
[0063] The moving handrail 1 deformed as described above can be corrected by the moving handrail manufacturing method according to 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 to be permeated through the cloth 30. Further, the deformed portion of the moving handrail 1 is pressurized and repaired using the press mechanism of the mold 50. With this, the force for gripping the guide 5 by the moving handrail 1 can be restored. Accordingly, the durability of the moving handrail 1 can be improved to extend the life of Date Recue/Date Received 2020-11-05 the moving handrail 1.
Reference Signs List [0064] 1 moving handrail, la one end side, lb another end side, laa, lba end surface, lab, lac, lbb, lbc joining surface, 2, 3 landing, 5 guide, 10 main body portion, 10a design surface, 10b guide surface, 10c joining portion, 20 tensile body, 30 cloth, 40, 41 cavity, 42 sink mark, 43, 44 gap, 50 mold, 51 upper mold, 52 lower mold, 52a mounting surface, 53 middle core Date Recue/Date Received 2020-11-05
is a schematic view for illustrating an example of an escalator device in which a moving handrail manufactured using a moving handrail manufacturing method according to a first embodiment of the present invention is arranged.
Date Recue/Date Received 2020-11-05 FIG. 2 is a sectional view for illustrating the moving handrail manufactured using the moving handrail manufacturing method according to the first embodiment of the present invention in cross section orthogonal to a longitudinal direction.
FIG. 3 is a partial perspective view for illustrating a preceding step of the moving handrail manufactured using the moving handrail manufacturing method according to the first embodiment of the present invention in partial cross section.
FIG. 4 is a partial perspective view for illustrating an example of defects caused in a moving handrail manufactured without using the moving handrail manufacturing method according to the first embodiment of the present invention in partial cross section.
FIG. 5 is an exploded perspective view for illustrating a mold to be used in the moving handrail manufacturing method according to the first embodiment of the present invention.
FIG. 6A is a schematic view for illustrating a first step of the moving handrail manufacturing method according to the first embodiment of the present invention in partial cross section.
FIG. 6B is a schematic view for illustrating a second step of the moving handrail manufacturing method according to the first embodiment of the present invention in partial cross section.
FIG. 6C is a schematic view for illustrating a third step Date Recue/Date Received 2020-11-05 of the moving handrail manufacturing method according to the first embodiment of the present invention in partial cross section.
FIG. 6D is a schematic view for illustrating a fourth step of the moving handrail manufacturing method according to the first embodiment of the present invention in partial cross section.
Description of Embodiments [0011] Now, description is made of a moving handrail manufacturing method according to an exemplary embodiment of the present invention with reference to the drawings.
[0011] First Embodiment FIG. 1 is a schematic view for illustrating an example of an escalator device in which a moving handrail 1 manufactured using a moving handrail manufacturing method according to a first embodiment of the present invention is arranged. FIG. 2 is a sectional view for illustrating the moving handrail 1 manufactured using the moving handrail manufacturing method according to the first embodiment of the present invention and a guide 5 to which the moving handrail 1 is mounted in cross section orthogonal to a longitudinal direction.
[0012] As illustrated in FIG. 1, the moving handrail 1 has an annular shape, and is circulated and moved by being inverted Date Recue/Date Received 2020-11-05 at landings 2 and 3 of the escalator device. Further, as illustrated in FIG. 2, the moving handrail 1 includes a main body portion 10, a tensile body 20, and a cloth 30.
[0013] As illustrated in FIG. 2, the main body portion 10 of the moving handrail 1 has a C shape in cross section. The main body portion 10 has a design surface 10a formed on a front side and a guide surface 10b formed on a back side. The design surface 10a is a surface to be touched by a user of the escalator device by hand. The guide surface 10b has the cloth 30 arranged on a surface thereof and slides along the guide 5 of the escalator device.
[0014] The main body portion 10 is mounted to the guide 5 such that the guide surface 10b covers a surface of the guide 5 of the escalator device. The main body portion 10 is formed of single thermoplastic elastomer such as polyurethane, polystyrene, or polyolefin elastomer, or thermoplastic elastomer containing two or more of the single elastomers mixed therein.
[0015] The tensile body 20 is embedded in the main body portion 10 along the longitudinal direction of the moving handrail 1 in order to satisfy the tensile strength and the bending strength required for the moving handrail 1. The tensile body 20 is formed of a metal plate or a plurality of steel cables.
[0016] The cloth 30 is formed of fiber such as cotton or linen or resin such as polyester such that the friction coefficient of the surface becomes lower. The cloth 30 is Date Recue/Date Received 2020-11-05 mounted to the guide surface 10b of the main body portion 10 so as to cover the guide surface 10b. The cloth 30 mounted to the guide surface 10b is slid relative to the surface of the guide 5.
[0017] Next, a step of molding the moving handrail 1 configured as described above is described. The molding step for the moving handrail 1 described here is an example, and does not specify the moving handrail manufacturing method of the present invention. As the step of molding the moving handrail 1, any of the steps that have hitherto been known may be used.
[0018] First, the tensile body 20 and the cloth 30 are arranged on an insert line of an extrusion molding machine (not shown). The tensile body 20 is arranged at a position at which the tensile body 20 is to be embedded in the thermoplastic elastomer. The cloth 30 is arranged on a surface on which the guide surface 10b is to be formed.
[0019] Next, the thermoplastic elastomer is poured into a mold of the extrusion molding machine, and the main body portion is subjected to extrusion molding together with the tensile body 20 and the cloth 30. Next, the endless moving handrail 1 that is continuously formed is wound around a core body for primary storage while being cooled by a medium such as water or air.
[0020] Next, the endless moving handrail 1 wound around the core body for primary storage is cut to a length corresponding Date Recue/Date Received 2020-11-05 to the specification of a final product. The cut surface of the cut moving handrail 1 is similar to the cross section of the moving handrail 1 illustrated in FIG. 2.
[0021] Next, a step of molding the cut moving handrail 1 into an annular shape is described with reference to FIG. 3.
FIG. 3 is a view for illustrating one end side la and another end side lb of the processed moving handrail 1. The step of molding the moving handrail 1 into an annular shape described here is an example, and does not specify the moving handrail manufacturing method of the present invention. As the step of molding the moving handrail 1 into an annular shape, any of the steps that have hitherto been known may be used.
[0022] First, on the one end side la of the moving handrail 1, the guide surface 10b side of the main body portion 10 is cut to an intermediate portion in a thickness direction of the tensile body 20 in a range of the length Li from an end surface laa of the one end side la toward the another end side lb. Then, a joining surface lab is formed on the guide surface 10b side of the one end side la, and a joining surface lac, which is perpendicular to the longitudinal direction of the moving handrail 1, is formed on an end portion of the joining surface lab on the another end side lb.
[0023] Next, on the another end side lb of the moving handrail 1, the design surface 10a side of the main body portion is cut to an intermediate portion in the thickness direction Date Recue/Date Received 2020-11-05 of the tensile body 20 in a range of the length Li from an end surface lba of the another end side lb toward the one end side la. Then, a joining surface lbb is formed on the design surface 10a side of the another end side lb, and a joining surface lbc, which is perpendicular to the longitudinal direction of the moving handrail 1, is formed on an end portion of the joining surface lbb on the one end side la.
[0024] Next, as illustrated in FIG. 3, the joining surface lab on the one end side la of the moving handrail 1 and the joining surface lbb on the another end side lb are overlaid on each other, and the moving handrail 1 is arranged in a mold (not shown).
[0025] Next, the one end side la and the another end side lb of the moving handrail 1 in the mold are heated by a heating device (not shown). Then, the thermoplastic elastomer forming the end surface laa and the joining surfaces lab and lac on the one end side la and the end surface lba and the joining surfaces lbb and lbc on the another end side lb is melted.
[0026] Next, the end surface laa on the one end side la and the joining surface lbc on the another end side lb, the joining surface lab on the one end side la and the joining surface lbb on the another end side lb, and the joining surface lac on the one end side la and the end surface lba on the another end side lb are butted against each other and welded to each other, respectively. A portion in which the one end side la and the Date Recue/Date Received 2020-11-05 another end side lb of the moving handrail 1 are welded to each other is hereinafter referred to as a joining portion 10c.
[0027] Next, the joining portion 10c of the moving handrail 1 and the mold are cooled under a state in which the moving handrail 1 is arranged in the mold. Next, the moving handrail 1 is taken out from the mold. Thus, the joining of the one end side la and the another end side lb of the moving handrail 1 is completed, thereby forming the moving handrail 1 having an annular shape. After that, steps in the moving handrail manufacturing method according to the first embodiment of the present invention are performed on the moving handrail 1 having an annular shape.
[0028] Here, defects caused in the main body portion 10 of the moving handrail 1 and the design surface 10a by the related-art moving handrail manufacturing method are described.
[0029] FIG. 4 is a partial perspective view for illustrating an example of defects caused in a moving handrail 1 manufactured without using the moving handrail manufacturing method according to the first embodiment of the present invention in partial cross section. FIG. 4 is an illustration of the joining portion 10c of the moving handrail 1 in a cross section of the another end side lb cut at a position of the joining surface lac on the one end side la illustrated in FIG. 3.
[0030] In the main body portion 10 and the design surface 10a in the joining portion 10c, a cavity 40 and a cavity 41 as Date Recue/Date Received 2020-11-05 illustrated in FIG. 4 may be formed by air bubbles generated when the thermoplastic elastomer is melted. The moving handrail 1 is subjected to bending stress when the moving handrail 1 is mounted to the escalator device and is inverted. Therefore, when the cavity 40 or the cavity 41 is present, a crack may be formed in the main body portion 10 or the design surface 10a from the cavity 40 or the cavity 41 as a starting point, with the result that the moving handrail 1 may be broken.
[0031] Further, when the joining surfaces are welded to each other and cooled, a sink mark 42 may be formed in the design surface 10a of the moving handrail 1 as illustrated in FIG. 4.
The cavity 41 and the sink mark 42 formed in the design surface 10a impair the appearance of the moving handrail 1, and hence the moving handrail 1 is treated as a defective product.
[0032] Further, when the welding between the one end side la and the another end side lb of the moving handrail 1 is insufficient in the joining portion 10c, as illustrated in FIG.
4, a gap 43 may be formed between the end surface laa on the one end side la and the joining surface lbc on the another end side lb in the joining portion 10c. Such a gap 43 causes breakage of the moving handrail 1.
[0033] Further, in the guide surface 10b of the moving handrail 1, the cloth 30 is not in close contact with the guide surface 10b in some cases. When the cloth 30 is not in close contact with the guide surface 10b, as illustrated in FIG. 4, Date Recue/Date Received 2020-11-05 the cloth 30 may be separated from the guide surface 10b to form a gap 44. When the gap 44 is formed between the cloth 30 and the guide surface 10b, there is a fear in that the slidability between the guide surface 10b and the guide 5 of the escalator device is lowered, and the cloth 30 peels off from the guide surface 10b to protrude from the moving handrail 1.
[0034] In order to correct such defects, the steps in the moving handrail manufacturing method of the present invention are performed on the joining portion 10c of the moving handrail 1 and the periphery of the joining portion 10c. The thermoplastic elastomer is thermoplastic, and hence can be re-molded by heating and softening. The moving handrail manufacturing method of the present invention utilizes such a property of the thermoplastic elastomer to correct the defects.
[0035] In the following, a mold 50 to be used in the moving handrail manufacturing method according to the first embodiment of the present invention and the steps in the moving handrail manufacturing method are described.
[0036] First, the mold 50 to be used in the moving handrail manufacturing method is described. FIG. 5 is an exploded perspective view of the mold 50. The mold 50 is formed of three members including an upper mold 51, a lower mold 52, and a middle core 53.
[0037] The upper mold 51 has a shape conforming to the design surface 10a of the moving handrail 1. The lower mold 52 Date Recue/Date Received 2020-11-05 has a shape conforming to a surface on a side opposite to the design surface 10a of the moving handrail 1. Further, the lower mold 52 has a mounting surface 52a to which the middle core 53 is to be mounted. The middle core 53 has a shape conforming to the guide surface 10b.
[0038] The dimensions of the upper mold 51 and the lower mold 52 in the longitudinal direction are all set to the same length L2. The length L2 of the mold 50 in the longitudinal direction is set larger than the length Li of the joining portion 10c by, for example, 50 mm or more to both sides so as to cover the entire part in which defects such as the cavities 40 and 41, the sink mark 42, and the gaps 43 and 44 due to the welding of the moving handrail 1 are expected to be caused.
[0039] Both end portions of each of the upper mold 51 and the lower mold 52 in the longitudinal direction have a tapered shape expanding toward the outside of the mold 50 so as to prevent an edge mark of the mold 50 from being formed in the periphery of the joining portion 10c of the moving handrail 1.
[0040] The length L3 of the middle core 53 is set to be equal to or larger 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 middle core 53 may be formed by assembling the plurality of components or formed integrally.
[0041] The mold 50 includes a heating mechanism and a press mechanism (not shown).
Date Recue/Date Received 2020-11-05 [0042] The heating mechanism is, for example, an electric rod heater to be inserted into at least one of the upper mold 51 and the lower mold 52. The press mechanism pressurizes the moving handrail 1 by advancing or retreating at least one of the upper mold 51 and the lower mold 52 relative to another one of the upper mold 51 and the lower mold 52.
[0043] In the moving handrail manufacturing method of the present invention, the thermoplastic elastomer forming the periphery of the joining portion 10c of the moving handrail 1 is heated by the heating mechanism to a temperature equal to or less than a thermal decomposition temperature and close to a glass transition temperature, around which temperature the viscosity appears in the thermoplastic elastomer. Then, the moving handrail 1 is pressurized by the mold 50 along the shape of the moving handrail 1. The thermoplastic elastomer heated to the temperature around which the viscosity appears is pressurized so that defects such as the cavities 40 and 41 and the gap 43 caused in the preceding step can be corrected.
[0044] Further, the mold 50 includes a cooling mechanism (not shown).
[0045] The cooling mechanism is formed by, for example, providing a flow passage for a refrigerant such as water or air in at least one of the upper mold 51 and the lower mold 52. The cooling mechanism lowers the temperature of the heated moving handrail 1 under a state in which the moving handrail 1 is held Date Recue/Date Received 2020-11-05 between the upper mold 51 and the lower mold 52, thereby stabilizing the shape of the moving handrail 1. With this, the defects such as the sink mark 42 formed in the design surface 10a of the moving handrail 1 in the preceding step can be corrected. Further, the cooling mechanism is provided so that the time required for cooling the moving handrail 1 can be shortened.
[0046] Next, the steps in the moving handrail manufacturing method according to the first embodiment using the mold 50 are described with reference to FIG. 6A to FIG. 6D.
[0047] First, the temperatures of the upper mold 51 and the lower mold 52 are raised to a temperature close to the glass transition temperature of the thermoplastic elastomer forming the moving handrail 1 by the heating mechanism (not shown) of the mold 50. The temperature of the middle core 53 may be raised at the same time as the upper mold 51 and the lower mold 52. It is preferred that the temperature of the middle core 53 be raised by heat transferred from the upper mold 51 and the lower mold 52 in order to prevent the cloth 30 of the moving handrail 1 from being burnt.
[0048] Next, as illustrated in FIG. 6A, the middle core 53 is inserted through the guide surface 10b in the joining portion 10c of the joined moving handrail 1. Next, as illustrated in FIG. 6B, the middle core 53 to which the moving handrail 1 is Date Recue/Date Received 2020-11-05 mounted is arranged on the mounting surface 52a of the lower mold 52.
[0049] Next, as illustrated in FIG. 6C, the upper mold 51 is moved toward the lower mold 52.
[0050] Next, as illustrated in FIG. 6D, the moving handrail 1 and the middle core 53 are sandwiched by the upper mold 51 and the lower mold 52 in an up-and-down direction.
[0051] Next, the temperatures of the joining portion 10c of the moving handrail 1 sandwiched by the upper mold 51 and the lower mold 52 and the periphery of the joining portion 10c are raised to the temperature around which the viscosity appears in the thermoplastic elastomer forming the moving handrail 1. At this time, a gap is prevented from being formed between each of the upper mold 51, the middle core 53, and the lower mold 52 and the moving handrail 1. When a gap is formed, there is a fear in that an irregular shape is formed in the design surface 10a of the moving handrail 1.
[0052] When the temperatures of the joining portion 10c of the moving handrail 1 and the periphery of the joining portion 10c are raised to the temperature around which the viscosity appears in the thermoplastic elastomer, the upper mold 51 is further lowered, and the joining portion 10c of the moving handrail 1 and the periphery of the joining portion 10c are pressurized. With this, the defects such as the cavities 40 and 41, the sink mark 42, and the gaps 43 and 44 caused in the Date Recue/Date Received 2020-11-05 joining portion 10c of the moving handrail 1 and the periphery of the joining portion 10c can be corrected.
[0053] Next, the upper mold 51, the lower mold 52, the middle core 53, and the moving handrail 1 are cooled by the cooling mechanism provided to the mold 50.
[0054] After the joining portion 10c of the moving handrail 1 and the periphery of the joining portion 10c are cooled to a temperature at which the shape is stabilized, the upper mold 51 is raised to be separated from the lower mold 52. Next, the middle core 53 to which the moving handrail 1 is mounted is removed from the lower mold 52. Next, the middle core 53 is removed from the moving handrail 1. With this, the steps in the moving handrail manufacturing method according to the first embodiment are completed.
[0055] In the preceding step of the moving handrail manufacturing method according to the first embodiment, when there is a portion in which the thermoplastic elastomer is insufficient on the surface of the moving handrail 1, it is preferred that the thermoplastic elastomer be replenished in the insufficient portion, and then the moving handrail 1 be pressurized by the upper mold 51 and the lower mold 52 so as to be molded. Further, when a burr or the like is formed on the surface of the moving handrail 1 after the molding, it is preferred that the burr be removed by a cutter or the like.
[0056] As described above, the moving handrail Date Recue/Date Received 2020-11-05 manufacturing method according to the first embodiment includes the step of reheating and pressurizing the joining portion 10c of the moving handrail 1, which is formed into an annular shape by joining one end side and another end side of a long composite material including the cloth 30, the main body portion 10 formed of the thermoplastic elastomer, and the tensile body 20, and the periphery of the joining portion 10c. With this, defects such as the cavity 41, the sink mark 42, and the gap 43 caused in the design surface 10a of the moving handrail 1 can be corrected.
Further, defects such as the cavity 40 and the gap 44 caused inside the main body portion 10 of the moving handrail 1 are corrected so that the durability of the moving handrail 1 can be improved.
[0057] In the first embodiment, the upper mold 51 of the mold 50 is moved toward the lower mold 52 to pressurize the joining portion 10c of the moving handrail 1 and the periphery of the joining portion 10c. However, the configuration of the mold 50 is not limited thereto. For example, 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.
[0058] Second Embodiment The moving handrail 1 used in the escalator is damaged by friction with a component that drives the moving handrail 1. In particular, the joining portion of the moving handrail 1 and the periphery of the joining portion are less liable to be bent, and Date Recue/Date Received 2020-11-05 hence are more liable to be damaged by the friction. Further, damage such as scratches or scrapes is caused on the surface of the moving handrail 1 by nails of a user, baggage, and the like.
In the second embodiment, the damaged portion of the moving handrail 1 is repaired using the moving handrail manufacturing method similar to that of the first embodiment so that the defects of the moving handrail 1 are corrected. The moving handrail manufacturing method according to the second embodiment is performed, for example, at the time of maintenance of the escalator.
[0059] In the moving handrail manufacturing method according to the second embodiment, first, the moving handrail 1 is removed from the guide.
Next, the moving handrail 1 to be repaired is set in the mold 50. When the joining portion of the moving handrail 1 is damaged, the joining portion and the periphery of the joining portion are set in the mold 50. When a portion of the moving handrail 1 other than the joining portion is damaged, the damaged portion is set at the center of the mold 50.
[0060] The subsequent steps are similar to the steps in the moving handrail manufacturing method according to the first embodiment.
When the surface of the moving handrail 1 is scraped, and the thermoplastic elastomer is insufficient, the thermoplastic elastomer is replenished in the insufficient portion, and the Date Recue/Date Received 2020-11-05 portion is heated and pressurized.
[0061] As described above, in the moving handrail manufacturing method according to the second embodiment, the damaged portion in the moving handrail 1 used in the escalator is heated and pressurized so that the damage of the moving handrail 1 can be repaired.
[0062] The moving handrail 1 used in the escalator being operated is deformed with time. With this, the gap between the moving handrail 1 and the guide 5 becomes larger. As a result, the force for gripping the guide 5 by the moving handrail 1 is lowered, and defects such as vibration and abnormal sound are caused in the moving handrail 1. When the gap between the moving handrail 1 and the guide 5 further becomes larger, there is a fear in that the moving handrail 1 comes off from the guide 5.
[0063] The moving handrail 1 deformed as described above can be corrected by the moving handrail manufacturing method according to 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 to be permeated through the cloth 30. Further, the deformed portion of the moving handrail 1 is pressurized and repaired using the press mechanism of the mold 50. With this, the force for gripping the guide 5 by the moving handrail 1 can be restored. Accordingly, the durability of the moving handrail 1 can be improved to extend the life of Date Recue/Date Received 2020-11-05 the moving handrail 1.
Reference Signs List [0064] 1 moving handrail, la one end side, lb another end side, laa, lba end surface, lab, lac, lbb, lbc joining surface, 2, 3 landing, 5 guide, 10 main body portion, 10a design surface, 10b guide surface, 10c joining portion, 20 tensile body, 30 cloth, 40, 41 cavity, 42 sink mark, 43, 44 gap, 50 mold, 51 upper mold, 52 lower mold, 52a mounting surface, 53 middle core Date Recue/Date Received 2020-11-05
Claims (9)
- [Claim 1] A moving handrail manufacturing method, comprising a step of heating and pressurizing a joining portion and a periphery of the joining portion, the joining portion being a portion in which one end side and another end side of a moving handrail formed of a material including a cloth, thermoplastic elastomer, and a tensile body are welded to each other.
- [Claim 2] The moving handrail manufacturing method according to claim 1, wherein the step of heating and pressurizing includes:
a step of arranging the joining portion and the periphery of the joining portion in a mold conforming to a shape of the moving handrail;
a step of heating the joining portion and the periphery of the joining portion to a temperature equal to or less than a thermal decomposition temperature of the thermoplastic elastomer and close to a glass transition temperature of the thermoplastic elastomer, around which viscosity appears in the thermoplastic elastomer;
a step of pressurizing the joining portion and the periphery of the joining portion; and a step of cooling the joining portion and the periphery of the joining portion to a temperature at which the thermoplastic elastomer is cured or a room temperature under a state in which the joining portion and the periphery of the Date Recue/Date Received 2020-11-05 joining portion are arranged in the mold. - [Claim 3] The moving handrail manufacturing method according to claim 2, wherein the step of heating and pressurizing includes a step of arranging the joining portion and the periphery of the joining portion in the mold including an upper mold, a lower mold, and a middle core arranged between the upper mold and the lower mold, and wherein the step of arranging the joining portion and the periphery of the joining portion in the mold includes a step of bringing the cloth arranged on the joining portion and the periphery of the joining portion into close contact with a surface of the middle core.
- [Claim 4] The moving handrail manufacturing method according to claim 3, wherein a length of the upper mold in a direction along a longitudinal direction of the moving handrail is equal to a length of the lower mold in the direction along the longitudinal direction of the moving handrail.
- [Claim 5] The moving handrail manufacturing method according to claim 3 or 4, wherein a length of the middle core in the direction along the longitudinal direction of the moving handrail is equal to or Date Recue/Date Received 2020-11-05 larger than the lengths of the upper mold and the lower mold in the direction along the longitudinal direction of the moving handrail, and wherein the middle core is configured to linearly fix the joining portion and the periphery of the joining portion between the upper mold and the lower mold.
- [Claim 6] The moving handrail manufacturing method according to any one of claims 3 to 5, wherein the mold includes a pressurizing mechanism, and wherein the pressurizing mechanism is configured to pressurize the moving handrail in a range from the joining portion to portions extended by 50 mm or more from both end portions of the joining portion to the one end side and the another end side of the moving handrail.
- [Claim 7] The moving handrail manufacturing method according to claim 6, wherein the pressurizing mechanism is configured to pressurize the moving handrail by moving at least one of the upper mold and the lower mold toward another one of the upper mold and the lower mold.
- [Claim 8] The moving handrail manufacturing method according to any one of claims 3 to 7, wherein the at least one of the upper mold and the lower mold includes a heating mechanism.
Date Recue/Date Received 2020-11-05 - [Claim 9] The moving handrail manufacturing method according to any one of claims 3 to 8, wherein the at least one of the upper mold and the lower mold includes a cooling mechanism.
Date Recue/Date Received 2020-11-05
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP2018-090829 | 2018-05-09 | ||
| JP2018090829 | 2018-05-09 | ||
| PCT/JP2018/038523 WO2019215941A1 (en) | 2018-05-09 | 2018-10-16 | Moving handrail production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA3099467A1 true CA3099467A1 (en) | 2019-11-14 |
| CA3099467C CA3099467C (en) | 2022-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CA3099467A Active CA3099467C (en) | 2018-05-09 | 2018-10-16 | Moving handrail manufacturing method |
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| JP (1) | JP6918223B2 (en) |
| CN (1) | CN112135725B (en) |
| CA (1) | CA3099467C (en) |
| WO (1) | WO2019215941A1 (en) |
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| JP7409516B2 (en) * | 2020-08-24 | 2024-01-09 | 三菱電機株式会社 | Manufacturing method of moving handrail for passenger conveyor |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0710452A (en) * | 1993-06-23 | 1995-01-13 | Hitachi Building Syst Eng & Service Co Ltd | Heating device for hand rail of passenger conveyer |
| JP2004277080A (en) * | 2003-03-14 | 2004-10-07 | Mitsubishi Electric Corp | Handrail guide device for passenger conveyor |
| JP2005225636A (en) * | 2004-02-13 | 2005-08-25 | Mitsubishi Electric Corp | Moving handrail for passenger conveyor, and manufacturing method thereof |
| JP4647423B2 (en) * | 2005-07-27 | 2011-03-09 | 三菱電機ビルテクノサービス株式会社 | Heating and pressing device for moving handrail for passenger conveyor and its connection method |
| AT502900B1 (en) * | 2005-11-09 | 2008-12-15 | Semperit Ag Holding | HANDRAIL |
| JP5022730B2 (en) * | 2007-02-19 | 2012-09-12 | 株式会社日立ビルシステム | Canvas repair pot for moving handrails for passenger conveyors |
| JP5446562B2 (en) * | 2009-08-05 | 2014-03-19 | 三菱電機ビルテクノサービス株式会社 | Processing method of moving handrail for man conveyor |
| JP4894031B1 (en) * | 2010-08-30 | 2012-03-07 | 株式会社アイコム | Model train container |
| KR101862969B1 (en) * | 2014-05-30 | 2018-05-31 | 미쓰비시덴키 가부시키가이샤 | Endless handrail manufacturing method, endless handrail and escalator |
| JP2017043443A (en) * | 2015-08-26 | 2017-03-02 | 三菱電機株式会社 | Method of manufacturing moving handrail of passenger conveyor and moving handrail of passenger conveyor |
-
2018
- 2018-10-16 CA CA3099467A patent/CA3099467C/en active Active
- 2018-10-16 JP JP2020517757A patent/JP6918223B2/en active Active
- 2018-10-16 WO PCT/JP2018/038523 patent/WO2019215941A1/en active Application Filing
- 2018-10-16 CN CN201880093009.8A patent/CN112135725B/en active Active
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| WO2019215941A1 (en) | 2019-11-14 |
| CN112135725A (en) | 2020-12-25 |
| JP6918223B2 (en) | 2021-08-11 |
| CN112135725B (en) | 2022-05-13 |
| JPWO2019215941A1 (en) | 2020-12-10 |
| CA3099467C (en) | 2022-07-19 |
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