WO2021117232A1 - Corps de suspension, procédé de production de corps de suspension, procédé d'assemblage d'ascenseur et ascenseur - Google Patents

Corps de suspension, procédé de production de corps de suspension, procédé d'assemblage d'ascenseur et ascenseur Download PDF

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Publication number
WO2021117232A1
WO2021117232A1 PCT/JP2019/048988 JP2019048988W WO2021117232A1 WO 2021117232 A1 WO2021117232 A1 WO 2021117232A1 JP 2019048988 W JP2019048988 W JP 2019048988W WO 2021117232 A1 WO2021117232 A1 WO 2021117232A1
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WIPO (PCT)
Prior art keywords
resin
suspension body
outer layer
thickness
fixture
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PCT/JP2019/048988
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English (en)
Japanese (ja)
Inventor
晋也 内藤
田中　直也
治彦 角谷
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2019/048988 priority Critical patent/WO2021117232A1/fr
Priority to JP2020529659A priority patent/JP6756420B1/ja
Priority to CN201980101237.XA priority patent/CN114787067B/zh
Publication of WO2021117232A1 publication Critical patent/WO2021117232A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/06—Arrangements of ropes or cables

Definitions

  • This disclosure relates to a suspension body and an elevator using the suspension body.
  • FRP Fiber Reinforced Plastics
  • the load support portion may be cracked due to the pressure from the fixture that fixes the suspension body. There was a problem.
  • the present disclosure has been made to solve the above-mentioned problems, and an object of the present disclosure is to provide a suspension body capable of suppressing cracks in a load supporting portion.
  • the suspension body according to the present disclosure has a belt-shaped load support portion made of fiber reinforced plastic and a holding portion that covers the load support portion and is formed of a flexible resin and is sandwiched by a main body portion and a fixture. It is provided with an outer layer portion in which the thickness of the sandwiching portion is thinner than the thickness of the main body portion.
  • a belt-shaped load supporting portion is formed by molding an impregnated body in which reinforcing fibers are impregnated with a matrix resin containing at least one of a thermoplastic resin and a thermosetting resin.
  • a part of an outer layer resin formed of a flexible resin covering a belt-shaped load support portion made of fiber reinforced plastic is partially cut.
  • the process of making the suspension body by thinning or heating it to a temperature higher than the thermal deformation temperature and pressing it to make it thinner to form a holding portion to be sandwiched by the fixture, and sandwiching the sandwiched portion of the suspension with the fixture.
  • the suspension body is provided with a step of fixing the suspension body to a balance weight that balances with the car and a step of winding the suspension body around a drive sheave that raises and lowers the car and the balance weight on a hoistway.
  • the elevator according to the present disclosure is provided with a drive sheave, a hoist for rotating the drive sheave, a suspension body according to the present disclosure wound around the drive sheave, and a fixture for sandwiching the holding portion of the suspension body. It is equipped with a cage that is fixed and moves up and down by the rotation of the drive sheave.
  • FIG. 5 is a relationship diagram showing the relationship between the compressive stress and the amount of compression of the suspension body according to the first embodiment. It is a side view of the suspension body which concerns on Embodiment 1. FIG. It is a cross-sectional view of AA in FIG. 1 of the suspension body which concerns on Embodiment 1. FIG. It is a BB sectional view in FIG. 1 of the suspension body which concerns on Embodiment 1. FIG. It is an enlarged sectional view of the load support part of the suspension body which concerns on Embodiment 1. FIG. It is a schematic diagram of the elevator using the suspension body which concerns on Embodiment 1. FIG.
  • FIG. 9 is a cross-sectional view of CC in FIG. 9 of the suspension body according to the second embodiment. It is a DD sectional view in FIG. 9 of the suspension body which concerns on Embodiment 2.
  • FIG. 9 is a cross-sectional view taken along the line EE in FIG. 9 of the suspension body according to the second embodiment. It is a side view of the suspension body which concerns on Embodiment 3.
  • FIG. It is FF sectional view in FIG. 13 of the suspension body which concerns on Embodiment 3.
  • FIG. It is a GG sectional view in FIG. 13 of the suspension body which concerns on Embodiment 3.
  • FIG. 9 is a cross-sectional view of CC in FIG. 9 of the suspension body according to the second embodiment. It is a DD sectional view in FIG. 9 of the suspension body which concerns on Embodiment 2.
  • FIG. 9 is a cross-sectional view taken along the line EE in FIG. 9 of the suspension body according to the second embodiment.
  • FIG. It is
  • Embodiment 1 When the suspension body is sandwiched and pressed by the fixture to suspend the elevator car, a force is applied to the load support portion formed of the FRP of the suspension body, and a force is also applied to the outer layer portion covering the load support portion.
  • the outer layer portion is a flexible resin, the resin is deformed outward in the width direction of the suspension body. The effect of this deformation on the load bearing was investigated.
  • FIG. 1 is an explanatory view of the occurrence of cracks
  • FIG. 1 (a) is a schematic cross-sectional view in a state where the suspension body is not pressed by the fixture 2
  • FIG. 1 (b) is a fixed cross-sectional view. It is sectional drawing which is the state pressed by the tool 2.
  • the suspension body can cover a belt-shaped load support portion 3 composed of FRP in which reinforcing fibers having tensile strength in the longitudinal direction are impregnated with, for example, a matrix resin which is a thermosetting resin, and the load support portion 3. It is composed of an outer layer 44 having flexibility.
  • the belt-shaped FRP constituting the load support portion 3 has a strong tensile strength in the longitudinal direction, but in the width direction, if the reinforcing fibers constituting the FRP of the load support portion 3 and the matrix resin are peeled off, vertical cracks occur. (Crack) may occur. Therefore, the outward deformation of the outer layer 44 in the width direction causes a problem because the load supporting portion 3 in contact with the outer layer 44 is pulled in the width direction.
  • the inventors considered that it was necessary to reduce the amount of deformation due to the pressing of the outer layer 44 by the fixture 2.
  • the outer layer 44 of the suspension body needs to be thick in order to secure durability against wear due to contact with the drive sheave 14 or the like around which the suspension body is wound.
  • the thickness of the outer layer 44 covering the portion pressed by the fixture 2 of the load support portion 3 is determined by the portion pressed by the fixture 2. It has been found that cracks in the load supporting portion 3 of the suspension body can be suppressed by making the thickness thinner than the thickness of the outer layer 44 that covers the parts other than the above. This will be described below.
  • a load support portion 3 composed of FRP having a thickness of 1.6 mm, a width of 35 mm, and a length of 40 mm is used, and the outer layer thickness of sample A is 0.7 mm and the outer layer thickness of sample B is 2.1 mm.
  • the sample was prepared.
  • the total thickness of sample A is 3.0 mm, and the total thickness of sample B is 5.8 mm.
  • carbon fiber and epoxy resin were used for the load-bearing portion 3 of each sample, and ether-based thermoplastic polyurethane elastomer was used for the outer layer of each sample.
  • the thickness of the outer layer other than the portion sandwiched between the fixtures 2 is generally set to a thickness that can withstand the wear caused by the contact with the drive sheave 14 or the like in order to secure the durability against the wear of the suspension body.
  • the outer layer thickness of sample B is further increased in order to increase the amount of compression.
  • the vertical axis of FIG. 2 is the compressive stress obtained by dividing the load during the compression test by the area of the test piece, and the horizontal axis is the amount of compression.
  • sample A even when compressed to a stress equal to or higher than that of the 2.1 mm test piece, no noise was introduced in the compressive stress, and no crack was confirmed in the load support portion 3.
  • sample B when the compression amounts were about 2.6 mm and about 3.4 mm, noise was introduced into the compressive stress and cracks were generated in the load support portion 3.
  • FIG. 3 is a side view of the suspension body 1 according to the first embodiment.
  • the suspension body 1 includes a belt-shaped load support portion 3 that is continuous in parallel with the longitudinal direction of the suspension body 1, and an outer layer portion 4 made of a flexible resin that covers the load support portion 3.
  • the belt shape means a shape extending in a belt shape.
  • the x-axis, y-axis, and z-axis are orthogonal to each other, and in the embodiment, the x-axis is the longitudinal direction, the y-axis is the width direction, and the z-axis is the thickness direction.
  • the load support portion 3 of the suspension body 1 shown by the broken line in FIG. 3 is composed of a main portion that is not pressed by the fixture 2 and an end portion that is pressed by the fixture 2.
  • the main part and the end part each have substantially the same cross section in the longitudinal direction. That is, the main portion and the end portion are integrated, and in the example of FIG. 3, there are end portions pressed by the fixture 2 at both ends of the main portion of the load support portion 3. Further, since the length of contact between the fixture 2 and the suspension body 1 is about 0.2 m, the length of the end portion in the longitudinal direction is at least 0.2 m or more.
  • the load support portion 3 is formed of FRP formed by impregnating a plurality of reinforcing fibers 7 which are strong against tension in the longitudinal direction, for example, which are continuous in parallel in the longitudinal direction, with a matrix resin 8. In this way, even a heavy one can be supported by the load supporting portion 3.
  • the outer layer portion 4 that covers the load supporting portion 3 has a main body portion 5 that covers the main portion and a holding portion 6 that covers the end portions, and is a cross-sectional view including the main body portion 5 of the suspension body 1 in FIGS. As shown in the cross-sectional view including the portion 6, the thickness t2 of the sandwiching portion 6 is formed to be thinner than the thickness t1 of the main body portion 5.
  • the thickness t2 of the sandwiching portion 6 is secured to a thickness that does not damage the load supporting portion 3 when sandwiched by the fixture 2. Then, in order to reduce the amount of deformation due to pressing, the thickness t2 of the sandwiching portion 6 is reduced.
  • the thickness t1 of the main body portion 5 is formed to be thicker than the holding portion 6 in order to prevent the load supporting portion 3 from being exposed due to wear due to contact between the main body portion 5 and, for example, the drive sheave 14.
  • the thickness of the sandwiching portion 6 is about the same on both sides sandwiched by the fixture 2. In this way, it is possible to prevent the compressive force from the fixture 2 from being biased to one side.
  • a tensile test was performed on a sample in which the thickness tf of the load supporting portion 3 and the thickness t2 of the sandwiching portion 6 were changed.
  • a load support portion 3 was prepared using carbon fiber as the reinforcing fiber 7 and an epoxy resin as the matrix resin 8, and ether was used as the resin covering the load support portion 3.
  • the sandwiching portion 6 was produced using a thermoplastic polyurethane elastomer (hardness 90A) of the system.
  • the load supporting portion 3 has a length of 1 m and a width of 35 mm
  • the holding portion 6 has a length of 0.25 m and is provided at both ends of the sample.
  • the tensile test was carried out by sandwiching the holding portions 6 provided at both ends of the sample with a wedge-type fixture 2 having a gripping length of 0.2 m and applying a tensile load.
  • Whether or not a crack has occurred is determined by determining that a crack has occurred in the load support portion 3 at a load lower than that of the entire sample breaking during the tensile test, and the load support portion 3 has a crack before the entire sample breaks. Those without cracks were judged to have no cracks.
  • Table 1 shows the presence or absence of cracks in each sample.
  • the thickness ratio t2 / tf of the thickness tf of the load supporting portion 3 and the thickness t2 of the sandwiching portion 6 is 100% or more (Comparative Examples 1 to 6)
  • a crack occurs in the load supporting portion and the thickness ratio t2 / tf becomes When it is 85% or less (Examples 1 to 10), it can be seen that cracks do not occur.
  • the thickness of the main body portion 5 that is worn is set to a thickness that can withstand the wear due to contact with the drive sheave 14, and the holding portion 6 that is deformed by pressing.
  • the load support portion 3 is formed by an FRP in which the reinforcing fibers 7 are arranged substantially parallel to the longitudinal direction of the suspension body 1.
  • the reinforcing fibers 7 are arranged in parallel with each other without twisting.
  • FIG. 6 is an enlarged cross-sectional view of the load supporting portion 3 in the suspension body 1 according to the first embodiment.
  • the load support portion 3 is composed of the matrix resin 8 and the reinforcing fibers 7, and is formed by impregnating the reinforcing fibers 7 with the matrix resin 8.
  • the reinforcing fiber 7 constituting the load supporting portion 3 it is preferable to use carbon fiber capable of ensuring strength. Further, as long as it is a lightweight and high-strength fiber, for example, a fiber such as a glass fiber, an aramid fiber, a polyarylate fiber, or a polyparaphenylene benzobisoxazole fiber may be used as the reinforcing fiber 7. Here, one of these fibers may be used as the reinforcing fiber 7, or two or more types may be used in combination as the reinforcing fiber 7.
  • the volume content of the reinforcing fibers which indicates the ratio of the volume occupied by the reinforcing fibers 7, is preferably about 50% to 70% with respect to the total volume of FRP. In this way, the load supporting portion 3 can be easily formed, and the reinforcing effect of the reinforcing fibers 7 can be obtained.
  • thermosetting resin or a thermoplastic resin is used as the matrix resin 8 constituting the load supporting portion 3.
  • the thermosetting resin is a resin obtained by adding a curing agent to a main agent such as an epoxy resin, a polyurethane resin, an unsaturated polyester resin, a vinyl ester resin, or a phenol resin, and the thermoplastic resin is, for example, polyurethane, polyamide 6, or polyamide. 12. Resin such as polyamide 66. Further, one of these resins may be used as the matrix resin 8, or two or more of these resins may be combined and used as the matrix resin 8. Further, the matrix resin 8 may contain additives such as a flame retardant and a mold release agent.
  • the matrix resin 8 is preferably an epoxy resin because of its high adhesive strength.
  • the outer layer portion 4 that covers the load support portion 3 will be described.
  • a flexible resin such as a thermoplastic elastomer is used.
  • the material constituting the outer layer portion 4 is preferably a thermoplastic polyurethane elastomer, and more preferably an ether-based thermoplastic polyurethane elastomer. Since the ether-based thermoplastic polyurethane elastomer has excellent hydrolysis resistance in a high-temperature and high-humidity environment, deterioration of the outer layer portion 4 due to the usage environment can be suppressed.
  • the ether system means that an ether bond is contained in the composition.
  • the outer layer portion 4 may be made of a material that can secure friction and has excellent wear resistance.
  • a material that can secure friction and has excellent wear resistance for example, an olefin-based thermoplastic elastomer, a styrene-based thermoplastic elastomer, a vinyl chloride-based thermoplastic elastomer, and a polyester-based thermoplastic elastomer. Elastomers, polyamide-based thermoplastic elastomers, and the like may be used.
  • the resin forming the outer layer portion 4 may contain a flame retardant, a cross-linking agent, or the like.
  • FIG. 7 is a schematic view of the elevator 9 according to the first embodiment.
  • the suspension body 1, the fixture 2 that sandwiches and fixes the end portion of the suspension body 1, the car 10 having the frame 11 suspended by the suspension body 1, and the suspension body 1 are wound around.
  • the drive sheave 14 and a hoisting machine that rotates the drive sheave 14 to wind up the suspension body 1 and raise and lower the car 10 are provided.
  • a counterweight 12 is suspended via a fixture 2 on the side of the suspension body 1 opposite to the side on which the car 10 is suspended, and the counterweight 12 is lifted and lowered by the deflecting wheel 13. Suspended so as not to come into contact with.
  • the hoisting machine motor and hoisting machine brake included in the hoisting machine rotate and brake the drive sheave 14 around which the suspension body 1 is wound, so that the car 10 and the balance weight 12 move through the hoistway 15. Go up and down and stop.
  • the elevating and lowering of the balance weight 12 with the car 10 is controlled by the control device 17 provided in the machine room 16 provided in the upper part of the hoistway 15 in the example of FIG.
  • the suspension body 1 included in the elevator 9 is composed of a load support portion 3 having strength in the vertical direction in FIG. 7, that is, a tensile direction in the longitudinal direction of the suspension body 1, and an outer layer portion 4 covering the periphery of the load support portion 3. It is formed.
  • the holding portion 6 is sandwiched by the fixing tool 2, and the car 10 is suspended via the fixing tool 2.
  • FIG. 8 shows an example of the fixture 2 that sandwiches the suspension body 1.
  • the fixture 2 includes, for example, a socket 18 and a wedge 19, and the suspension body 1 is inserted into the socket 18 and a force is applied to the end of the suspension body 1 in the thickness direction of the suspension body 1 by driving the wedge 19.
  • the suspension body 1 is sandwiched. Further, as in the example shown in FIG. 8, the end portion of the suspension body 1 may be gripped by the stopper 20. When the suspension body 1 is gripped by the stopper 20, it is possible to prevent the suspension body 1 from slipping between the suspension body 1 and the fixture 2 and the suspension body 1 from falling out of the fixture 2.
  • the thickness of the belt-shaped load support portion 3 formed of FRP and the sandwich portion 6 sandwiched by the fixture 2 is set from the thickness of the main body portion 5.
  • the matrix resin 8 is prepared by mixing the base resin that is the base of the matrix resin 8 with the curing agent, additives, etc. used as needed.
  • the reinforcing fiber 7 is impregnated with the matrix resin 8, and the impregnated body is formed into a belt shape by, for example, drawing molding to form the load support portion 3 (load support portion forming step).
  • the flexible outer layer resin is heated to a temperature above the heat flow temperature (hereinafter referred to as the heat flow temperature), and the load support portion 3 is continuously covered with the heat flow outer layer resin, for example, by extrusion coating.
  • the heat-fluidized outer layer resin is solidified by a method such as water cooling or air cooling to obtain a continuum in which the load supporting portion 3 is coated with the solidified outer layer resin (outer layer resin forming step).
  • water cooling and air cooling include not only cooling the outer layer resin by circulating cooling water and air, but also exposing the outer layer resin to outside air and the like.
  • the thickness of the outer layer resin covering the end portion pressed by the fixture 2 of the load support portion 3 is reduced, and the outer layer portion having the main body portion 5 and the sandwiching portion 6 having different thicknesses.
  • Form 4 The outer layer resin is cut by a milling machine or the like, and the outer layer resin is thinned in parallel with the surface over a length of about 0.2 m to form a sandwiching portion 6 (pinching portion forming step) to obtain an outer layer portion 4.
  • the outer layer resin covering the end portion is pressed by pressing the outer layer resin covering the end portion in a state of being heated to a temperature higher than the temperature at which the outer layer resin covering the end portion is thermally deformed (hereinafter referred to as the thermal deformation temperature).
  • the thickness of the outer layer resin covering the portion is made thinner than the thickness of the outer layer resin covering the main portion.
  • the thermal deformation temperature when pressing is performed using a spacer formed of, for example, a metal whose target thickness is a dimension, the thickness can be adjusted more easily. In this way, the outer layer portion 4 having the main body portion 5 and the sandwiching portion 6 can be formed, and the suspension body 1 can be manufactured.
  • the excess portion may be cut in a later step. Further, in the step of forming the sandwiching portion 6, an example in which the sandwiching portion 6 is thinned in parallel has been described, but the thinned portion may not be parallel and a partially thick portion may remain in the sandwiching portion 6.
  • an impregnated body in which the reinforcing fibers 7 are impregnated with a matrix resin 8 containing a thermoplastic resin, a thermosetting resin, or both is formed to form a continuous load support portion 3 in a belt shape. Then, it is coated with a flexible outer layer resin heated to a heat flow temperature or higher and solidified. Further, the outer layer resin of the portion covering the end portion of the load supporting portion 3 is partially thinned by cutting or heated to a temperature higher than the thermal deformation temperature and pressed, and partially thinned and sandwiched between the fixtures 2. The sandwiching portion 6 is formed. In this way, it is possible to obtain the suspension body 1 capable of suppressing the generation of cracks due to the pressing from the fixture 2.
  • a continuum cut to a required length is prepared, which has a belt-shaped load support portion 3 formed of FRP and an outer layer resin formed of a flexible resin that covers the load support portion 3.
  • the portion sandwiched by the fixture 2 of the outer layer resin is partially thinned by cutting or heated to a temperature higher than the thermal deformation temperature and pressed to partially thin the portion sandwiched by the fixture 2.
  • the portion 6 is formed to obtain the suspension body 1.
  • the suspension body 1 is connected to the car 10 and the counterweight 12 via the fixture 2.
  • the suspension body 1 is wound around the drive sheave 14 so that the car 10 and the counterweight 12 can move up and down the hoistway 15 by the rotation of the hoisting machine.
  • suspension body 1 can be sandwiched by the fixture 2, and the car 10 and the counterweight 12 can be suspended by the suspension body 1 from the hoistway 15 of the elevator 9 to assemble the elevator 9.
  • FIG. 9 is a side view of the suspension body 1 according to the second embodiment. Similar to the first embodiment, the suspension body 1 according to the second embodiment has a belt-shaped load support portion 3 formed of FRP and an end portion pressed by the fixture 2 rather than the thickness covering the main portion. The outer layer portion 4 having a thin covering thickness is provided. In the second embodiment, the thickness of the outer layer portion 4 at the end of the suspension body 1 gripped by the fixture 2 is thinner than the thickness of the outer layer portion 4 at the main portion of the suspension body 1, and further. The difference is that the sandwiching portion 6 is provided with a locking portion 21 that continuously locks the fixture 2.
  • the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.
  • FIG. 10 is a cross-sectional view including the main body portion
  • FIG. 11 is a cross-sectional view including the sandwiching portion
  • FIG. 12 is a cross-sectional view including the sandwiching portion.
  • the locking portion 21 is provided adjacent to the holding portion 6 on the opposite side of the main body portion 5 so as to lock the fixture 2.
  • the locking portion 21 is provided so as to be in contact with the fixture 2, and the thickness t3 of the locking portion 21 is t2 ⁇ between the thickness t1 of the main body portion 5 and the thickness t2 of the sandwiching portion 6. It has a relationship of t3 ⁇ t1.
  • the length of the locking portion 21 in the longitudinal direction is 30 mm or more, preferably 50 mm or more. In this way, even if a load in the tensile direction is applied to the suspension body 1, the displacement of the fixture 2 in the longitudinal direction can be suppressed. Since the locking portion 21 is not sandwiched by the fixture 2, it is not pressed in the thickness direction, and there is no effect on the occurrence of cracks due to the increase in thickness.
  • the manufacturing method of the suspension body 1 according to the second embodiment will be described.
  • the same method as that described in the first embodiment can be used until the step of obtaining the continuum in which the load supporting portion 3 is coated with the outer layer resin.
  • the thickness of the outer layer resin covering the end pressed by the fixture 2 is reduced to form the outer layer portion 4 having the main body portion 5 and the sandwiching portion 6 having different thicknesses.
  • a method of reducing the thickness of the outer layer resin for example, cutting with a milling machine or the like is used.
  • the outer layer resin is thinned in parallel with the surface for about 0.2 m, and at the same time, a locking portion 21 having a length of about 30 mm is provided continuously with the sandwiching portion 6.
  • the locking portion 21 is formed to exceed the thickness of the holding portion 6 and to be less than or equal to the thickness of the main body portion 5. That is, the locking portion 21 is formed by making the cutting amount of the outer layer resin covering the load supporting portion 3, for example, the tip side smaller than that of the sandwiching portion 6 in the step of forming the sandwiching portion 6. Here, a small amount of cutting includes not being cut. In this way, the main body portion 5 that covers the main portion, the holding portion 6 that is formed thinner than the main body portion 5 by cutting, and the cutting amount that is smaller than that of the holding portion 6 are continuously provided in the holding portion 6. An outer layer portion 4 having the locked locking portion 21 is obtained.
  • the suspension body 1 thus obtained is provided with a locking portion 21 which is continuous with the sandwiching portion 6 and is thicker than the thickness of the sandwiching portion 6 sandwiched by the fixture 2.
  • the displacement of the fixture 2 in the longitudinal direction can be suppressed.
  • the sandwiching portion 6 is formed by cutting, but as described in the first embodiment, the outer layer resin is partially heated and pressed to a temperature higher than the thermal deformation temperature.
  • the sandwiching portion 6 may be formed by making it thin.
  • a locking portion can be obtained by adjusting the pressing amount using, for example, a mold so as to continuously form a portion thicker than the sandwiching portion 6 in the sandwiching portion 6.
  • FIG. 13 is a side view of the suspension body 1 according to the third embodiment. Similar to the first embodiment, the suspension body 1 according to the third embodiment has a belt-shaped load support portion 3 formed of FRP and an end portion pressed by the fixture 2 rather than the thickness covering the main portion. The outer layer portion 4 having a thin covering thickness is provided. The third embodiment is different in that the outer layer portion 4 is formed of a plurality of resin layers. The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.
  • the main body portion 5 that covers the main portion of the load support portion 3 is formed by a first coating layer 22 that covers the main portion and a second coating layer 23 that covers the first coating layer 22.
  • the holding portion 6 covering the end portion of the load supporting portion 3 is formed by the third coating layer 24 covering the end portion exposed from the fourth coating layer 25.
  • the first coating layer 22 and the third coating layer 24 are continuums having substantially the same cross section in the longitudinal direction.
  • the third coating layer 24 is exposed from the fourth coating layer 25 on the surface in contact with the fixture 2.
  • the first coating layer 22 and the third coating layer 24 have different colors from the second coating layer 23 and the fourth coating layer 25, so that they can be visually distinguished.
  • the fourth coating layer 25 is removed by cutting in the manufacturing process of the suspension body 1, and the total thickness of the first coating layer 22 and the second coating layer 23 becomes the thickness t1 of the main body portion 5, and the third coating layer 24 Is the thickness t2 of the sandwiching portion 6. Further, if the third coating layer 24 is exposed on the surface in contact with the fixture 2, the fourth coating layer 25 may remain without being removed in the width direction of the sandwiching portion 6.
  • color includes transparency.
  • the suspension body 1 of the present embodiment includes the outer layer portion 4 having the main body portion 5 and the holding portion 6, and the color of the outermost layer of the main body portion 5 and the surface of the holding portion 6 in contact with the fixture 2.
  • the color of the outermost layer is different. In this way, it is possible to prevent the end portion from being exposed from the sandwiching portion 6 in the step of reducing the thickness of the resin by cutting at the time of forming the sandwiching portion 6, and the sandwiching portion 6 is formed in the sandwiching portion forming step. Since it is possible to grasp how thin the outer layer resin of the portion to be formed should be, the formation becomes easy.
  • the manufacturing method of the suspension body 1 according to the present embodiment will be described.
  • the same method as that described in the first embodiment can be used up to the step of obtaining the load support portion 3 formed in a belt shape.
  • the flexible resin is thermally fluidized and then solidified by a method such as water cooling or air cooling to form a first resin layer composed of a first coating layer 22 and a third coating layer 24. Covers the load support portion 3 with. Next, the first resin layer is covered with a second resin layer composed of a second coating layer 23 and a fourth coating layer 25, which are different in color from the first resin layer.
  • the thickness of the resin covering the portion pressed by the fixture 2 is reduced, and the outer layer having the main body portion 5 and the sandwiching portion 6 having different thicknesses. Part 4 is formed.
  • the method of reducing the thickness of the outer layer resin is, for example, cutting with a milling machine or the like.
  • the outer layer resin is thinned parallel to the surface over a length of about 0.2 m until the first resin layer is exposed to form the sandwiching portion 6.
  • the outer layer portion 4 of the suspension body 1 is formed of a plurality of layers having different colors, so that the thickness of the outer layer resin at the time of forming the holding portion 6 is reduced. It is possible to prevent the load supporting portion 3 from being exposed, and further, it is possible to suppress damage to the load supporting portion 3 due to excessive cutting.
  • the case where the outer layer portion 4 is formed by two layers has been described, but when a more multi-step guideline is required in the step of forming the sandwiching portion 6, a resin having three or more layers.
  • the load support portion 3 may be covered with the above layer so that the colors are different between the layers. In this way, for example, if processing is performed while detecting a change in color with a sensor, the accuracy of forming the sandwiching portion 6 is improved.
  • the example in which the end portion of the suspension body 1 is fixed by the fixture 2 has been described, but when the fixture 2 is attached to a portion other than the end portion of the suspension body 1, another method is used.
  • the portion may be thinned to provide the sandwiching portion 6.
  • the suspension body 1 is used as the belt of the elevator 9, but one end is sandwiched by the fixture 2 and a tensile force is generated at both ends, for example, a crane belt. It is also possible to apply the suspension body 1 to the above.

Abstract

Selon l'invention, dans un corps de suspension qui supporte la charge d'un ascenseur, etc., il existe un problème selon lequel, lorsqu'une partie de support de charge disposée sur le corps de suspension est comprimée, des fissures pourraient se former dans la partie de support de charge en association avec une déformation dans la direction de la largeur du corps de suspension d'une partie de couche externe recouvrant la partie de support de charge.　Selon la présente invention, un corps de suspension (1) est pourvu : d'une partie de support de charge en forme de courroie (3) formée à partir de plastique renforcé par des fibres ; et d'une partie de couche externe (4) recouvrant la partie de support de charge (3), la partie de couche externe (4) étant formée à partir d'une résine souple, comprenant une partie prise en sandwich (6) qui est prise en sandwich par une partie de corps et un accessoire de fixation, et étant telle que l'épaisseur de la partie prise en sandwich (6) est inférieure à l'épaisseur de la partie de corps (5). Cela atténue la déformation de la partie de couche externe (4) et permet de supprimer la formation de fissures dans la partie de suspension de charge (3), la durabilité de la partie de couche externe (4) au regard de l'usure étant assurée.
PCT/JP2019/048988 2019-12-13 2019-12-13 Corps de suspension, procédé de production de corps de suspension, procédé d'assemblage d'ascenseur et ascenseur WO2021117232A1 (fr)

Priority Applications (3)

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PCT/JP2019/048988 WO2021117232A1 (fr) 2019-12-13 2019-12-13 Corps de suspension, procédé de production de corps de suspension, procédé d'assemblage d'ascenseur et ascenseur
JP2020529659A JP6756420B1 (ja) 2019-12-13 2019-12-13 懸架体、懸架体の製造方法、エレベーターの組立方法、及びエレベーター
CN201980101237.XA CN114787067B (zh) 2019-12-13 2019-12-13 悬挂体、悬挂体的制造方法、电梯的组装方法和电梯

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PCT/JP2019/048988 WO2021117232A1 (fr) 2019-12-13 2019-12-13 Corps de suspension, procédé de production de corps de suspension, procédé d'assemblage d'ascenseur et ascenseur

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DE112021007002T5 (de) * 2021-02-01 2023-11-16 Mitsubishi Electric Corporation Designverfahren für einen aufzug und aufzug

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JP6522268B1 (ja) * 2018-07-20 2019-05-29 三菱電機株式会社 エレベータロープ端末構造体

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JP6756420B1 (ja) 2020-09-16
CN114787067A (zh) 2022-07-22

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