JP7170901B2 - Elevator Suspension and Elevator - Google Patents

Description

The present invention relates to an elevator suspension and an elevator from which a car is suspended.

Ropes using reinforcing fibers are known that have a load-bearing portion in which reinforcing fibers oriented in the longitudinal direction of the rope, which is a suspension, are contained in a matrix, which is a covering layer. Carbon fibers or glass fibers are used as reinforcing fibers, and epoxy resin is used as the matrix. A rope using reinforcing fibers has a higher breaking strength per unit weight than a wire rope made of twisted steel wires. Therefore, in high-rise elevators that require particularly long ropes, ropes using reinforcing fibers have attracted attention because they can reduce the weight of the entire rope and reduce the driving load of the hoisting machine. However, ropes using reinforcing fibers have poor flexibility due to the high elastic modulus of the reinforcing fibers. In elevators, ropes using reinforcing fibers are shaped into thin, wide belt-shaped cross-sections in order to bend the ropes along the drive sheaves of the hoisting machine. When such a belt-type rope is wound around the drive sheave and driven, in order to prevent the rope from moving in the width direction and coming off the drive sheave, a convex surface called a crown is formed on the surface of the drive sheave. There is something.

If a crown is formed on the surface of the drive sheave, the belt-shaped rope will also be bent in the width direction along the crown. At this time, a bending stress in the width direction due to the crown acts on the load-bearing portion of the belt-type rope. In the following, this bending stress is referred to as crown bending stress. The magnitude of the crown bending stress is determined by the modulus of the matrix. In a belt-type rope, the reinforcing fibers are not oriented in the width direction, so the strength in the width direction of the rope is significantly lower than that in the longitudinal direction. can be torn apart and destroyed.

Patent Literature 1 discloses a rope whose matrix is composed of a material containing an elastomer that is a low elastic modulus component. Since the elastic modulus of the matrix is lower than that of the matrix made of epoxy resin, the crown bending stress of the rope using reinforcing fibers is reduced, and the durability of the rope using reinforcing fibers is improved.

Japanese Patent Publication No. 2013-504695

However, in the technique described in Patent Document 1, the reinforcing fibers are only bonded to the matrix by the surface material. In the technique described in Patent Literature 1, the surface material is made of a material containing polyurethane, thermoplastic elastomer, polyester, rubber or a rubber derivative. A surface material made of such a material has an interfacial strength between the reinforcing fiber and the matrix that can suppress delamination failure at the interface between the reinforcing fiber and the matrix when subjected to crown bending stress. do not have.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and provides an elevator suspension capable of improving the interfacial strength between the reinforcing fibers and the covering layer while reducing the crown bending stress in the width direction of the suspension. The goal is to get the body.

In order to solve the above-described problems and achieve the object, the elevator suspension of the present invention comprises a load-bearing layer having a width larger than the thickness, and an outer circumference of the load-bearing layer in a cross section perpendicular to the length direction. and a covering layer that covers at least a portion of the The load bearing layer has a plurality of longitudinally oriented fibers and a cured impregnated resin that fills between the plurality of fibers. The impregnated resin is an epoxy resin containing a polyoxy-based epoxy resin and a bisphenol A type epoxy resin containing a polyoxyalkylene bond represented by general formula (1) in the resin skeleton.

ADVANTAGE OF THE INVENTION According to this invention, it is effective in the ability to improve the interfacial strength between a reinforcing fiber and a coating layer, reducing the crown bending stress in the width direction of a suspension body.

A diagram schematically showing an example of the overall configuration of an elevator according to Embodiment 1. Sectional view schematically showing an example of a configuration in a direction perpendicular to the length direction of the rope according to Embodiment 1 A cross-sectional view schematically showing an example of a configuration in a direction perpendicular to the length direction of the rope wound around the drive sheave. Partial cross-sectional view schematically showing an example of the configuration of the load bearing layer in a direction perpendicular to the length of the rope 4 is a graph showing an example of the relationship between crown bending stress and fiber-resin interfacial strength with respect to the compounding ratio of the polyoxy epoxy resin in the rope according to Embodiment 1. FIG. A diagram schematically showing an example of the configuration of a load bearing layer manufacturing apparatus. A diagram showing an example of the change in the elastic modulus of the impregnated resin depending on the presence or absence of the reactive diluent with respect to the compounding ratio of the polyoxy epoxy resin. 7 is a diagram showing an example of the relationship between the crown bending stress and the fiber-resin interface strength with respect to the compounding ratio of the polyoxy epoxy resin in the rope according to Embodiment 2. FIG.

An elevator suspension and an elevator according to embodiments of the present invention will be described in detail below with reference to the drawings. In addition, this invention is not limited by these embodiments.

Embodiment 1.
FIG. 1 is a diagram schematically showing an example of the overall configuration of an elevator according to Embodiment 1. FIG. The elevator 10 is provided in a building such as a building, and includes a vertically extending hoistway 11 and a machine room 12 provided above the hoistway 11 . The elevator 10 has a hoist 13 , a deflector 14 and an elevator controller 15 in a machine room 12 . The hoisting machine 13 has a driving sheave 16 , a hoisting machine motor (not shown) that rotates the driving sheave 16 , and a hoisting machine brake (not shown) that brakes the rotation of the driving sheave 16 .

The elevator 10 includes a plurality of ropes 17 as suspension bodies, a car 18 as a first elevating body that ascends and descends in the hoistway 11, and a counterweight 19 as a second elevating body that ascends and descends in the hoistway 11. , have Note that FIG. 1 shows only one rope 17 . A plurality of ropes 17 are wound around the drive sheave 16 and the deflector wheel 14 . Each rope 17 has a first end 17 a connected to the cage 18 and a second end 17 b connected to the counterweight 19 . The cage 18 and counterweight 19 are suspended by ropes 17 in a 1:1 roping scheme. Also, the car 18 and the counterweight 19 move up and down in the hoistway 11 by rotating the drive sheave 16 . The elevator control device 15 controls operation of the car 18 by controlling the hoist 13 .

The elevator 10 has a pair of car guide rails (not shown) and a pair of counterweight guide rails (not shown) in the hoistway 11 . The car guide rails guide the elevator car 18 in the hoistway 11 . The counterweight guide rail guides the lifting and lowering of the counterweight 19 within the hoistway 11 .

The car 18 has a car frame 20 to which the rope 17 is connected and a car room 21 supported by the car frame 20 . A person or an object is accommodated in the cage 21 .

FIG. 2 is a cross-sectional view schematically showing an example of a configuration in a direction perpendicular to the length direction of the rope according to Embodiment 1. FIG. In the following description, the longitudinal direction of the rope 17 is the Z direction. In a plane perpendicular to the Z direction, the width direction of the rope 17 is the X direction, and the thickness direction of the rope 17 perpendicular to the X direction is the Y direction. As shown in FIG. 2, the rope 17 is a so-called flat belt having a belt shape in which the thickness, ie the dimension in the Y direction, is smaller than the width, ie the dimension in the X direction.

The rope 17 also has a sheave contact surface 17c, which is one of the end surfaces in the thickness direction. The sheave contact surface 17 c contacts the outer peripheral surface of the drive sheave 16 when the rope 17 is wound around the drive sheave 16 . That is, when the rope 17 passes through the drive sheave 16, it is bent along the outer peripheral surface of the drive sheave 16 so that the sheave contact surface 17c faces inward.

The rope 17 has a belt-like load bearing layer 31 and a covering layer 32 covering at least part of the outer periphery of the load bearing layer 31 . The load support layer 31 is a layer that mainly supports the load acting on the rope 17 . The covering layer 32 has a function of protecting the load bearing layer 31 .

FIG. 3 is a cross-sectional view schematically showing an example of a configuration in a direction perpendicular to the length direction of the rope wound around the drive sheave. When driving the drive sheave 16 around which the rope 17 is wound, in order to prevent the rope 17 from moving in the width direction, that is, in the X direction, and coming off the drive sheave 16, the surface of the drive sheave 16 is provided with a crown 16a. A convex surface called is formed. The rope 17 wound around the drive sheave 16 is bent in the width direction of the rope 17 along the crown 16a.

FIG. 4 is a partial cross-sectional view schematically showing an example of the configuration of the load support layer in the direction perpendicular to the length of the rope, and is an enlarged cross-sectional view of region D in FIG. The load support layer 31 includes a plurality of high-strength fibers 311 and a hardened impregnating resin 312 filled between the plurality of high-strength fibers 311 . The high-strength fibers 311 are arranged to be oriented in the length direction of the load-bearing layer 31, that is, in the Z direction. A fiber-resin interface 315 exists between the high-strength fiber 311 and the impregnating resin 312 .

The high-strength fibers 311 are lightweight and high-strength fibers compared to steel wires. Examples of high strength fibers 311 are carbon fibres, glass fibres, aramid fibres, PBO (poly-paraphenylenebenzobisoxazole) fibres, or basalt fibres. Alternatively, one example of high-strength fiber 311 is a composite fiber combining two or more fibers selected from the group of carbon fiber, glass fiber, aramid fiber, PBO fiber and basalt fiber.

As shown in FIG. 3, when the rope 17 is bent in the width direction of the rope 17 along the crown 16a, as shown in FIG. works. The crown bending stress S becomes a tensile stress on the load bearing layer upper surface 31a. That is, on the side of the upper surface 31a of the load supporting layer, stress acts in the direction of tearing off the fiber-resin interface 315 .

The magnitude of the crown bending stress S is determined by the elastic modulus of the impregnated resin 312 . Moreover, since the high-strength fibers 311 are not oriented in the width direction of the rope 17 , the strength in the width direction of the rope 17 is determined by the interfacial strength at the fiber-resin interface 315 . If the elastic modulus of the impregnating resin 312 is too high, the interfacial strength at the fiber-resin interface 315 is significantly lower than the strength in the longitudinal direction of the load-bearing layer 31 . Therefore, the fiber-resin interface 315 may be separated by the crown bending stress S, and the load bearing layer 31 may be torn in the width direction and destroyed.

Therefore, in Embodiment 1, an epoxy resin containing a polyoxy-based epoxy resin having a polyoxyalkylene bond represented by the following general formula (2) in the resin skeleton and a bisphenol A type epoxy resin is used as the impregnation resin 312. be done.

The elastic modulus of the impregnated resin 312 is preferably in the range of 0.01 GPa or more and less than 2 GPa. This is because the crown bending stress S can be sufficiently reduced when the elastic modulus of the impregnated resin 312 is within this range. As a result, breakage of the load supporting layer 31 of the rope 17 can be prevented.

The substituent R in general formula ( ₂ ) represents a hydrogen atom H or a methyl group _CH3 , and the substituent R' represents _{C2H4 , C3H6} or bisphenol A. The polyoxy-based epoxy resin having a polyoxyalkylene bond represented by the general formula (2) has flexibility due to the ether group, and thus has flexibility as compared with a general-purpose bisphenol A type epoxy resin. Moreover, since the polyoxy-based epoxy resin having the polyoxyalkylene bond represented by the general formula (2) has a relatively low viscosity, it is excellent in impregnation between the high-strength fibers 311 .

However, the polyoxy-based epoxy resin alone has poor reactivity with the surface of the high-strength fiber 311, and the interfacial strength of the fiber-resin interface 315 may be lower than the crown bending stress S. If the interfacial strength of the fiber-resin interface 315 is too low, the fiber-resin interface 315 may be separated by the crown bending stress S, and the load support layer 31 may be destroyed. Therefore, by blending a bisphenol A type epoxy resin, which has excellent adhesiveness with the high-strength fiber 311, into the polyoxy-based epoxy resin, the fiber-resin interface 315 can have flexibility and can suppress breakage due to the crown bending stress S. An impregnating resin 312 having an interfacial strength of .

The impregnation resin 312 contains a curing agent in addition to the polyoxy epoxy resin and the bisphenol A epoxy resin. As the curing agent, general curing agents such as amine curing agents, acid anhydrides, and imidazoles can be used without particular limitation. In addition, the impregnated resin 312 may contain a curing accelerator, an internal release agent, a filler, etc., in addition to the curing agent.

The polyoxy epoxy resin and the bisphenol A type epoxy resin are continuously bonded. Here, "continuously bonded" means that the polyoxy epoxy resin and the bisphenol A type epoxy resin are integrated without phase separation from each other. When the polyoxy-based epoxy resin and the bisphenol A-type epoxy resin are phase-separated from each other, the heat resistance of the impregnating resin 312 is dominated by whichever resin has the lower gelation temperature. Generally, the heat resistance of the polyoxy epoxy resin is lower than that of the bisphenol A type epoxy resin, so the heat resistance of the impregnation resin 312 is governed by the heat resistance of the polyoxy epoxy resin. When the polyoxy-based epoxy resin and the bisphenol A type epoxy resin are continuously bonded, the gelling temperature of the impregnated resin 312 is a value between the gelling temperatures of the respective resins, resulting in phase separation. Heat resistance can be improved as compared with the case.

Whether or not the polyoxy-based epoxy resin and the bisphenol A type epoxy resin are phase-separated is determined by evaluating the gelation temperature of the impregnating resin 312 in the state of a cured product. When the polyoxy epoxy resin and the bisphenol A epoxy resin are phase-separated, the gelling temperatures of the polyoxy epoxy resin and the bisphenol A epoxy resin are separately detected. For example, when the gelation temperature is evaluated by dynamic viscoelasticity measurement, two temperatures at which the dynamic viscoelasticity drops sharply are observed. On the other hand, when the polyoxy epoxy resin and the bisphenol A type epoxy resin are continuously bonded without phase separation, only one point of gelation temperature is detected. In this specification, the detection of only one gelling temperature of the impregnated resin 312 in the state of a cured product means that the polyoxy epoxy resin and the bisphenol A epoxy resin are "continuously bonded". defined as

The coating layer 32 is preferably made of a material having heat resistance and wear resistance. By changing the material of the coating layer 32, the coefficient of friction between the rope 17 and the drive sheave 16 can be adjusted. Therefore, the material of the coating layer 32 is selected to provide the desired coefficient of friction between the rope 17 and the drive sheave 16 .

Thermoplastic resins such as polyethylene, polypropylene, polyamide 6 (PA6), polyamide 12 (PA12), polyamide 66 (PA66), polycarbonate, polyetheretherketone, and polyphenylene sulfide can be used as the material of the coating layer 32 .

As a material for the coating layer 32, an olefin-based, styrene-based, polyvinyl chloride-based, urethane-based, polyester-based, polyamide-based, fluorine-based, or butadiene-based thermoplastic elastomer can be used.

Furthermore, as the material of the coating layer 32, thermosetting elastomer rubber such as butadiene rubber, styrene-butadiene rubber, chloroprene rubber, acrylic rubber, urethane rubber, and silicone rubber can be used.

In FIGS. 2 and 3 , the coating layer 32 covers the entire lengthwise side surfaces of the load bearing layer 31 , but covers at least a portion of the lengthwise side surfaces of the load bearing layer 31 . should be covered. The portion to be covered may be the portion where the rope 17 contacts the drive sheave 16 . For example, in the examples of FIGS. 2 and 3, the coating layer 32 may be provided only on the lower surface of the load support layer 31 in the Y direction, and the coating layer 32 may not be provided on the other surfaces.

FIG. 5 is a diagram showing an example of the relationship between the crown bending stress and the fiber-resin interfacial strength with respect to the compounding ratio of the polyoxy epoxy resin in the rope according to Embodiment 1. In FIG. In this figure, the horizontal axis indicates the weight compounding ratio of the polyoxy epoxy resin when the total weight of the polyoxy epoxy resin and the bisphenol A type epoxy resin is 100. Hereinafter, the weight blending ratio of the polyoxy epoxy resin is referred to as the polyoxy epoxy resin blending ratio. The vertical axis indicates relative crown bending stress and relative fiber-resin interfacial strength at each compounding ratio. The relative crown bending stress is normalized by setting the interfacial strength of the fiber-resin interface 315 when the blending ratio of the polyoxy epoxy resin is 0% to the crown bending stress. The relative fiber-resin interface strength is normalized by setting the interfacial strength at the fiber-resin interface 315 to 1 when the polyoxy epoxy resin blending ratio is 0%. Graph s in the figure indicates relative crown bending stress, and graph is indicates relative fiber-resin interfacial strength.

From FIG. 5, the relative crown bending stress s is higher than the relative fiber-resin interfacial strength is in regions where the polyoxy epoxy resin compounding ratio is lower than 47% and higher than 98%. If the polyoxy-based epoxy resin compounding ratio is lower than 47%, the elastic modulus of the impregnated resin 312 increases, and as a result, the crown bending stress S increases. When the blending ratio of the polyoxy-based epoxy resin is higher than 98%, the elasticity of the impregnated resin 312 is reduced to lower the crown bending stress S, but the interfacial strength of the fiber-resin interface 315 is also reduced, resulting in a decrease in the crown bending stress. It is believed that the stress S is higher.

From the above, there is an appropriate range for the blending ratio of the polyoxy-based epoxy resin for realizing the rope 17 according to Embodiment 1, and the range is a range of 47% or more and 98% or less for the polyoxy-based epoxy resin blending ratio. be. The relative fiber-resin interfacial strength is also varies due to variations in manufacturing the rope 17 and the like. If the blending ratio of the polyoxy-based epoxy resin deviates to the lower side, the manufactured rope 17 may be damaged. Therefore, the blending ratio of the polyoxy epoxy resin is preferably in the range of 55% or more and 90% or less, and more preferably in the range of 60% or more and 85% or less. By setting the blending ratio of the polyoxy-based epoxy resin within such a range, it is possible to suppress damage to the rope 17 even if the relative fiber-resin interfacial strength is is reduced due to variations during manufacturing.

In other words, by using a resin having a polyoxy-based epoxy resin blending ratio of 47% or more and 98% or less as the impregnating resin 312, the elasticity of the impregnating resin 312 is reduced to reduce the crown bending stress S and the interfacial strength of the fiber-resin interface 315. can be compatible with the improvement of As a result, breakage of the rope 17 by the crown 16a of the drive sheave 16 can be prevented.

In Embodiment 1, the rope 17 includes a load bearing layer 31 including a plurality of high-strength fibers 311 oriented in the length direction of the rope 17 and an impregnated resin 312 filled between the plurality of high-strength fibers 311. have The impregnated resin 312 is an epoxy resin containing a polyoxy-based epoxy resin containing a polyoxyalkylene bond represented by general formula (2) and a bisphenol A type epoxy resin. As a result, the interfacial strength at the fiber-resin interface 315 between the high-strength fiber 311 and the impregnated resin 312 can be improved while reducing the crown bending stress in the width direction of the rope 17 . Further, in the elevator 10 using this rope 17, there is an effect that the rope 17 can be prevented from being broken by the crown 16a of the drive sheave 16.

Embodiment 2.
In Embodiment 2, first, a general method for manufacturing a load-bearing layer will be described. A problem when using an impregnation resin containing a bisphenol A type epoxy resin will be described. After that, a second embodiment for solving this problem will be described.

FIG. 6 is a diagram schematically showing an example of the configuration of a load bearing layer manufacturing apparatus. In one example, the load bearing layer 31 of the rope 17 according to Embodiment 1 is manufactured by a pultrusion method. A manufacturing apparatus 100 for the load bearing layer 31 includes a bobbin 101 , a resin impregnation mold 102 , a thermoforming section 103 , a drawing section 104 and a winding section 105 .

In the pultrusion method, a high-strength fiber bundle 110 in which a plurality of high-strength fibers 311 are bundled is pulled out from a bobbin 101 and pulled into a resin-impregnated mold 102 by a puller 104 . In FIG. 6, only three high-strength fiber bundles 110 are shown for simplification of explanation. In the resin impregnation mold 102 , the aligned high-strength fiber bundles 110 are impregnated with the impregnation resin 312 . Here, the high-strength fiber bundle 110 is impregnated with the impregnation resin 312 before curing.

After that, the high-strength fiber bundle 110 impregnated with the impregnating resin 312 is drawn into the thermoforming section 103 by the drawing section 104 . The thermoforming unit 103 heats the high-strength fiber bundle 110 impregnated with the impregnation resin 312 . The impregnated resin 312 is cured by being heated. As a result, the high-strength fibers 311 and the impregnated resin 312 are integrated to form the load-bearing layer 31 . The formed load bearing layer 31 is wound up by the winding section 105 .

In the resin impregnation step in the resin impregnation mold 102, it is necessary to impregnate the impregnation resin 312 between the high-strength fibers 311 arranged at narrow intervals. Therefore, it is desirable that the viscosity of the impregnating resin 312 is low. Although the impregnating resin 312 containing the polyoxy epoxy resin has a relatively low viscosity, the impregnating property of the impregnating resin 312 may not be sufficient depending on the viscosity or compounding ratio of the bisphenol A type epoxy resin.

Therefore, in the rope 17 according to Embodiment 2, the impregnated resin 312 further contains a reactive diluent. The reactive diluent is a diluent that has low viscosity and is reactive with the polyoxy epoxy resin and bisphenol A type epoxy resin that are the main ingredients. It is a component that can increase viscosity and improve impregnation.

The reactive diluent should be reactive with the polyoxy epoxy resin and the bisphenol A epoxy resin. In particular, a polyoxy epoxy resin having a polyoxyalkylene bond represented by general formula (2) is suitable as a reactive diluent.

When the reactive diluent is a polyoxy-based epoxy resin, the elastic modulus of the impregnating resin 312 is lower when the reactive diluent is added than when the reactive diluent is not added.

FIG. 7 is a diagram showing an example of changes in the elastic modulus of the impregnated resin depending on the presence or absence of a reactive diluent with respect to the compounding ratio of the polyoxy epoxy resin. In this figure, the horizontal axis indicates the blending ratio of the polyoxy-based epoxy resin, and the vertical axis indicates the elastic modulus of the impregnated resin 312 . Graph C0 shows the elastic modulus of the impregnating resin 312 when no reactive diluent is added, and graph C1 shows the reactive dilution when the total weight of the polyoxy epoxy resin and bisphenol A epoxy resin is 100. Figure 3 shows the elastic modulus of the impregnated resin 312 when the agent is added at 20% weight.

As can be seen from FIG. 7, the elastic modulus of the impregnating resin 312 at the same polyoxy epoxy resin compounding ratio is lower when the reactive diluent is added than when the reactive diluent is not added. It is considered that this is because the addition of the reactive diluent relatively increases the ratio of the flexible polyoxy-based epoxy resin, thereby making the impregnated resin 312 low in elasticity.

If a reactive diluent is added to the polyoxy epoxy resin, the elasticity of the impregnated resin 312 will be lowered, so it is thought that the preferred blending ratio of the polyoxy epoxy resin will also change. FIG. 8 is a diagram showing an example of the relationship between the crown bending stress and the fiber-resin interfacial strength with respect to the compounding ratio of the polyoxy epoxy resin in the rope according to Embodiment 2. In FIG. In this figure, the horizontal axis indicates the polyoxyepoxy resin compounding ratio, and the vertical axis indicates the relative crown bending stress and the relative fiber-resin interfacial strength at each compounding ratio. The relative crown bending stress and the relative fiber-resin interfacial strength are the same as in FIG. 5, so descriptions thereof are omitted. Graph s in the figure indicates relative crown bending stress, and graph is indicates relative fiber-resin interfacial strength.

Comparing FIG. 8 and FIG. 5, the range in which the relative fiber-resin interface strength is exceeds the relative crown bending stress s moves to the lower polyoxy epoxy resin compounding ratio in FIG. Therefore, there is an appropriate range for the blending ratio of the polyoxy-based epoxy resin when the reactive diluent is added, and the range is a range of 34% or more and 98% or less for the polyoxy-based epoxy resin blending ratio. The relative fiber-resin interfacial strength is also varies due to variations in manufacturing the rope 17 and the like. If the blending ratio of the polyoxy-based epoxy resin deviates to the lower side, the manufactured rope 17 may be damaged. Therefore, the blending ratio of the polyoxy epoxy resin is preferably 40% or more and 90% or less, more preferably 50% or more and 85% or less. By setting the blending ratio of the polyoxy-based epoxy resin within such a range, it is possible to suppress damage to the rope 17 even if the relative fiber-resin interfacial strength is is lowered due to variations during manufacturing.

The weight compounding ratio of the reactive diluent is preferably in the range of 0% or more and 20% or less when the total weight of the polyoxy epoxy resin and the bisphenol A type epoxy resin is 100. In the following, the weight blending ratio of the reactive diluent is referred to as the reactive diluent blending ratio. If the reactive diluent compounding ratio is more than 20%, the heat resistance of the impregnating resin 312 is lowered, which is not desirable. The case where the reactive diluent is 0% corresponds to the case described in the first embodiment. As described above, by setting the mixing ratio of the reactive diluent to 20% or less, it is possible to reduce the viscosity of the impregnated resin 312 while suppressing deterioration in the heat resistance of the impregnated resin 312 .

In Embodiment 2, as the impregnation resin 312, a resin having a polyoxy epoxy resin blending ratio of 34% or more and 98% or less and a reactive diluent blending ratio of 0% or more and 20% or less is used. This reduces the viscosity of the impregnating resin 312 . As a result, it is possible to obtain the rope 17 capable of suppressing breakage of the drive sheave 16 by the crown 16a while realizing an improvement in the impregnating property of the impregnating resin 312 between the high-strength fibers 311 .

The configuration shown in the above embodiment shows an example of the content of the present invention, and it is possible to combine it with another known technology, and one configuration can be used without departing from the scope of the present invention. It is also possible to omit or change the part.

10 elevator, 11 hoistway, 12 machine room, 13 hoist, 14 deflector, 15 elevator controller, 16 drive sheave, 16a crown, 17 rope, 17c sheave contact surface, 18 car, 20 car frame, 21 car compartment , 31 load bearing layer, 31a load bearing layer upper surface, 32 coating layer, 100 manufacturing apparatus, 101 bobbin, 102 resin impregnation mold, 103 thermoforming section, 104 drawing section, 105 winding section, 110 high-strength fiber bundle, 311 height Strength fiber, 312 impregnating resin, 315 fiber-resin interface.

Claims (9)

a load-bearing layer having a width larger than the thickness in a cross section perpendicular to the length direction;
a coating layer covering at least a portion of the outer periphery of the load supporting layer;
with
The load support layer has a plurality of fibers oriented in the length direction and a hardened impregnated resin that fills spaces between the plurality of fibers,
An elevator suspension, wherein the impregnated resin is an epoxy resin containing a polyoxy-based epoxy resin containing a polyoxyalkylene bond represented by the general formula (1) in the resin skeleton and a bisphenol A type epoxy resin. .

The substituent R in the general formula (1) is a hydrogen atom H or a methyl group _CH3 ,
2. Elevator suspension according to claim 1, characterized in that the substituent R' is _{C2H4 , C3H6} or bisphenol _- A. 3. The elevator suspension according to claim 1, wherein the hardened impregnation resin comprises a continuous bond between the polyoxy epoxy resin and the bisphenol A epoxy resin. The elevator suspension according to any one of claims 1 to 3, wherein the elastic modulus of the hardened material of the impregnated resin is 0.01 GPa or more and 2 GPa or less. 4. The weight compounding ratio of the polyoxy epoxy resin is 47% or more and 98% or less when the total weight of the polyoxy epoxy resin and the bisphenol A type epoxy resin of the impregnation resin is 100. 5. An elevator suspension as claimed in any one of 1 to 4. 5. The elevator suspension of any one of claims 1 to 4, wherein the impregnating resin further comprises a reactive diluent that reduces the viscosity of the impregnating resin. 7. The elevator suspension according to claim 6, wherein the reactive diluent is a polyoxy epoxy resin having a polyoxyalkylene bond represented by the general formula (1) in the resin skeleton. The impregnated resin has a weight blending ratio of the polyoxy epoxy resin of 34% or more and 98% or less when the total weight of the polyoxy epoxy resin and the bisphenol A type epoxy resin is 100, and the reactive diluent 8. The elevator suspension according to claim 6 or 7, wherein the weight compounding ratio of is 0% or more and 20% or less. an elevator suspension according to any one of claims 1 to 8;
a hoist having a drive sheave around which the suspension is wound;
A car suspended by the suspension and raised and lowered by the rotation of the drive sheave;
with
An elevator, wherein said drive sheave has a crown on its surface.

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