Mobile cable

Abstract

The present disclosure provides a mobile cable capable of further reducing weight. The moving cable (5b) is a flat cable of which one end in the length direction is fixed to a car (3) of the elevator (1). A mobile cable (5b) is provided with a plurality of strip-shaped conductors (10), a plurality of strip-shaped insulators (11), and an outer coating (9). Each strip conductor (10) is a strip of aluminum or an aluminum alloy. In a plane perpendicular to the longitudinal direction of the mobile cable (5b), an outer coating (9) covers the whole of the plurality of strip conductors (10) and the plurality of strip insulators (11) in a state in which the strip conductors (10) and the strip insulators (11) are alternately stacked in the thickness direction.

Description

Technical Field

[0001] The present disclosure relates to a moving cable for an elevator. Background Art

[0002] Patent Document 1 discloses an example of a flat moving cable for an elevator. The moving cable includes a plurality of cores formed by bundling a plurality of conductive wires respectively, and an outer covering that covers the plurality of cores.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2009-280349 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] One end in the length direction of the moving cable of Patent Document 1 is fixed to a car and suspended in a hoistway. If the traveling distance of the car becomes longer due to high-rise buildings or the like, the moving cable becomes longer. Along with this, the weight of the moving cable becomes larger.

[0008] The present disclosure relates to the solution of such a problem. The present disclosure provides a moving cable for an elevator that can further reduce the weight.

[0009] Means for Solving the Problems

[0010] The moving cable of the present disclosure is a flat moving cable whose one end in the length direction is fixed to an elevator car, and the moving cable includes: a plurality of strip conductors that are strips of aluminum or aluminum alloy; one or more strip insulators; and an outer covering that covers the plurality of strip conductors and the one or more strip insulators as a whole in a state where the strip conductors and the strip insulators are alternately laminated in a thickness direction perpendicular to the length direction.

[0011] Advantages of the Invention

[0012] According to the moving cable for an elevator of the present disclosure, the weight is further reduced. Brief Description of the Drawings

[0013] Figure 1 It is a structural diagram of an elevator according to Embodiment 1.

[0014] Figure 2 It is a cross-sectional view of the moving cable according to Embodiment 1 taken in a plane perpendicular to the length direction.

[0015] Figure 3 It is a perspective view showing the structure of an end portion in the length direction of the moving cable according to Embodiment 1.

[0016] Figure 4 This is a cross-sectional view of a surface perpendicular to the longitudinal direction of the moving cable of the comparative example.

[0017] Reference numeral description

[0018] 1: Elevator; 2: Hoistway; 3: Car; 4: Control panel; 5, 5a, 5b, 5c: Moving cable; 6: Junction box; 7, 7s, 7p: Multicore cable; 8: Steel core; 9: Outer covering; 10: Strip conductor; 11: Strip insulator; 12: Bus bar; 13: Connection terminal. Detailed implementation manner

[0019] A manner for implementing the object of the present disclosure will be described with reference to the accompanying drawings. In each figure, the same or corresponding parts are denoted by the same reference numerals, and repeated descriptions are appropriately simplified or omitted. In addition, the object of the present disclosure is not limited to the following embodiments, and within the scope not departing from the gist of the present disclosure, deformation of any constituent element of the embodiment or omission of any constituent element of the embodiment can be performed.

[0020] Embodiment 1.

[0021] Figure 1 This is a structural diagram of the elevator 1 of Embodiment 1.

[0022] The elevator 1 is applied to a building having multiple floors. In the building, a hoistway 2 for the elevator 1 is provided. The hoistway 2 is a space that extends in the vertical direction and spans multiple floors. The elevator 1 includes a car 3 and a control panel 4. The car 3 is a device that transports users of the elevator 1 between multiple floors of the building by traveling in the vertical direction in the hoistway 2. The car 3 travels in the hoistway 2 by using the driving force generated by a traction machine (not shown) through a main rope (not shown) or the like, for example. The control panel 4 is a device that controls the operation of the elevator 1. The control panel 4 is disposed, for example, in the upper part or the lower part of the hoistway 2. For example, when a machine room for the elevator 1 is provided above the hoistway 2 or the like, the control panel 4 can also be disposed in the machine room. The operation of the elevator 1 controlled by the control panel 4 includes the traveling of the car 3 and the like.

[0023] The elevator 1 is equipped with a movable cable 5. The movable cable 5 is a cable for supplying power to the car 3 and inputting / outputting signals of the car 3, etc. One end in the length direction of the movable cable 5 is connected to the car 3. The other end in the length direction of the movable cable 5 is connected to a connection box 6 provided on the wall surface of the hoistway 2, etc. The connection box 6 is connected to the control panel 4 in a manner capable of supplying power and communicating signals, etc. The end of the movable cable 5 on the car 3 side is fixed to the car 3 by a sling (not shown), etc. The end of the movable cable 5 on the connection box 6 side is fixed to the connection box 6 by a sling (not shown), etc. The movable cable 5 is suspended between the car 3 and the connection box 6 in the hoistway 2. As the car 3 travels in the up and down directions, the movable cable 5 deforms and moves inside the hoistway 2.

[0024] Figure 2 It is a cross-sectional view of a plane perpendicular to the length direction of the movable cable 5 of Embodiment 1.

[0025] In this example, the elevator 1 is equipped with a movable cable 5a and a movable cable 5b. Here, when not particularly distinguishing between the movable cable 5a and the movable cable 5b, etc., it is sometimes only expressed as the movable cable 5. In this example, the movable cable 5 is a flat cable.

[0026] The movable cable 5a includes a plurality of multi-core cables 7, a plurality of steel cores 8, and an outer covering 9. In this example, the movable cable 5a includes 6 multi-core cables 7 and 4 steel cores 8.

[0027] From the aspects of resistance to bending accompanying the movement of the movable cable 5 and the strength of supporting its own weight, etc., each multi-core cable 7 uses, for example, copper stranded wire. In this example, each multi-core cable 7 is a signal cable for inputting / outputting signals of the car 3. Each multi-core cable 7 is arranged along the length direction of the movable cable 5.

[0028] Each steel core 8 is a component for strengthening and supporting the movable cable 5. Each steel core 8 is, for example, a cable rope, etc. Each steel core 8 is arranged along the length direction of the movable cable 5.

[0029] In the movable cable 5a, the plurality of multi-core cables 7 and the plurality of steel cores 8 are arranged in a row in the width direction perpendicular to the length direction. The plurality of steel cores 8 are arranged at intervals of two with respect to the multi-core cables 7. Two of the plurality of steel cores 8 are arranged on the two outer sides in the width direction.

[0030] The outer covering sheath 9 is a part that constitutes the outer covering of the moving cable 5. The outer covering sheath 9 is, for example, an insulating resin or the like. The outer covering sheath 9 covers the multi-core cable 7, the steel core 8, etc. of the moving cable 5. In the moving cable 5a, each multi-core cable 7 is embedded in the outer covering sheath 9. In the moving cable 5a, each steel core 8 is embedded in the outer covering sheath 9. In the moving cable 5a, in a plane perpendicular to the length direction, the outer covering sheath 9 covers the plurality of multi-core cables 7 and the plurality of steel cores 8 as a whole.

[0031] The moving cable 5b includes a plurality of strip conductors 10, a plurality of strip insulators 11, a plurality of steel cores 8, and an outer covering sheath 9. In this example, the moving cable 5b includes six strip conductors 10, eight strip insulators 11, and three steel cores 8.

[0032] Each strip conductor 10 is, for example, a strip of aluminum or aluminum alloy. The aluminum alloy is, for example, an Al-Cu alloy or the like. In this example, each strip conductor 10 is used as a power conductor for supplying power to the car 3. In this example, the widths of the respective strip conductors 10 are the same as each other. In addition, the thicknesses of the respective strip conductors 10 are the same as each other. Each strip conductor 10 is arranged along the length direction of the moving cable 5. The thickness direction of each strip conductor 10 is arranged to be consistent with the thickness direction of the moving cable 5. The thickness direction of the moving cable 5 is a direction perpendicular to the length direction and the width direction.

[0033] Each strip insulator 11 is, for example, insulating paper or the like. In this example, the widths of the respective strip insulators 11 are the same as each other. The width of each strip insulator 11 is wider than the width of the strip conductor 10. In addition, the thicknesses of the respective strip insulators 11 are the same as each other. Each strip insulator 11 is arranged along the length direction of the moving cable 5. The thickness direction of each strip insulator 11 is arranged to be consistent with the thickness direction of the moving cable 5.

[0034] In the moving cable 5b, multiple strip conductors 10 and multiple strip insulators 11 are arranged in an alternately laminated state in the thickness direction. In this example, two sets of multiple strip conductors 10 and multiple strip insulators 11 are arranged separately on the left and right in the width direction. On the left side in the width direction, 4 strip insulators 11 and 3 strip conductors 10 are laminated one by one alternately. That is, one strip insulator 11 is sandwiched between two opposed strip conductors 10. In addition, strip insulators 11 are arranged on both outer sides in the thickness direction. The laminated multiple strip conductors 10 and multiple strip insulators 11 are arranged so that the center lines in the width direction are aligned. At this time, the left end of each strip insulator 11 is located on the left side of the left end of the multiple strip conductors 10 laminated together. In addition, the right end of each strip insulator 11 is located on the right side of the right end of the multiple strip conductors 10 laminated together. That is, in the width direction of the moving cable 5, the left and right end portions of each strip insulator 11 are located on the outer sides of the left and right end portions of the multiple strip conductors 10 laminated together. Similarly, on the right side in the width direction, 4 strip insulators 11 and 3 strip conductors 10 are laminated one by one alternately. In addition, strip insulators 11 are arranged on both outer sides in the thickness direction. The steel cores 8 are arranged on the left and right outer sides of the strip conductors 10 in the width direction. In this example, one steel core 8 is arranged at each of the left and right ends in the width direction of the moving cable 5b. In addition, one steel core 8 is arranged between the strip conductors 10 laminated separately on the left and right at the center in the width direction of the moving cable 5b.

[0035] In the moving cable 5b, multiple strip conductors 10 and multiple strip insulators 11 are embedded in the outer covering 9 in an alternately laminated state. In the moving cable 5b, each steel core 8 is embedded in the outer covering 9. In the moving cable 5b, in a plane perpendicular to the length direction, the outer covering 9 covers the multiple strip conductors 10, the multiple strip insulators 11, and the multiple steel cores 8 as a whole.

[0036] Figure 3 It is a perspective view showing the structure of the end portion in the length direction of the moving cable 5b of Embodiment 1.

[0037] The moving cable 5b includes a plurality of busbars 12. Each busbar 12 is, for example, a conductor plate made of copper or other metals. Each busbar 12 corresponds to any one of the plurality of strip conductors 10. Each busbar 12 is connected to the corresponding strip conductor 10, for example, by welding or soldering at the end in the length direction of the moving cable 5b. Each busbar 12 protrudes from the corresponding strip conductor 10 toward the same side in the thickness direction. The plurality of busbars 12 are arranged at different positions in the width direction. In this example, the plurality of busbars 12 are arranged offset from each other left and right. In each busbar 12, a connection terminal 13 is provided at the end protruding in the thickness direction of the moving cable 5b. In the moving cable 5b, power is input and output through the connection terminal 13.

[0038] Next, use Figure 4 to illustrate an example of the effect in the case of using the moving cable 5b of Embodiment 1.

[0039] Figure 4 is a cross-sectional view of a plane perpendicular to the length direction of the moving cable 5c of the comparative example.

[0040] In the comparative example, the elevator 1 includes two moving cables 5c. The moving cable 5c includes a plurality of multi-core cables 7, a plurality of steel cores 8, and an outer covering 9. In this example, each moving cable 5c includes 6 multi-core cables 7 and 4 steel cores 8.

[0041] From the aspects of resistance to bending associated with the movement of the moving cable 5c and strength to support its own weight, etc., each multi-core cable 7 uses, for example, copper stranded wire. In the moving cable 5c of this example, 3 of the multi-core cables 7 are signal multi-core cables 7s for inputting and outputting signals of the car 3. In addition, in the same moving cable 5c, the other 3 of the multi-core cables 7 are power multi-core cables 7p for supplying power to the car 3. Here, when not particularly distinguishing between the signal multi-core cable 7s and the power multi-core cable 7p, etc., it is sometimes only expressed as the multi-core cable 7. Each multi-core cable 7 is arranged along the length direction of the moving cable 5c.

[0042] In the moving cable 5c, the plurality of multi-core cables 7 and the plurality of steel cores 8 are arranged in a row in the width direction perpendicular to the length direction. The plurality of steel cores 8 are arranged every two with respect to the multi-core cables 7. Two of the plurality of steel cores 8 are arranged on the two outer sides in the width direction.

[0043] In the moving cable 5c, each multi-core cable 7 is buried in the outer covering 9. In the moving cable 5c, each steel core 8 is buried in the outer covering 9. In the moving cable 5c, in a plane perpendicular to the length direction, the outer covering 9 covers the plurality of multi-core cables 7 and the plurality of steel cores 8 as a whole.

[0044] In the comparative example, both the power cable and the communication cable are multi-core cables 7, and each mobile cable 5c is formed. Here, the electrical conductivity of copper is higher than that of aluminum. On the other hand, the specific gravity of aluminum is lighter than that of copper. When the difference in specific gravity between copper and aluminum is compared in terms of their ratio, it is larger than the difference in electrical conductivity between copper and aluminum. Therefore, when setting the conductor cross-sectional area so that the resistance value per unit length is the same, the weight per unit length when using aluminum as the conductor is lighter than the weight per unit length when using copper as the conductor. Thus, by changing the conductor of the mobile cable 5c from copper to aluminum, a reduction in the weight of the conductor can be achieved. On the other hand, in this case, in order to keep the resistance value per unit length at the same level, it is necessary to increase the conductor cross-sectional area. Especially in the power cable, a certain amount of electric power or more needs to be supplied. Therefore, when the resistance value per unit length becomes larger, as the length of the mobile cable 5c increases, the influence of voltage drop becomes larger. Based on this, when using aluminum instead of copper as the conductor of the multi-core cable 7, it is necessary to increase the conductor cross-sectional area. At this time, the cross-sectional area of the outer covering 9 that forms a flat cable by covering the entire multi-core cable 7 also becomes larger. As a result, if aluminum is applied to the conductor of the multi-core cable 7, the weight per unit length of the entire mobile cable 5c may not become lighter, and in some cases, it may become heavier.

[0045] In contrast, in the elevator 1 of the first embodiment, the communication mobile cable 5a and the power mobile cable 5b are used, and the communication and power mobile cables 5 are separated. In the power mobile cable 5b, instead of the multi-core cable 7, a strip-shaped conductor 10 such as a strip of aluminum or an aluminum alloy is used as the conductor that bears the power supply. Since the strip-shaped conductor 10 is thin, it can be laminated in the thickness direction. In addition, since the strip-shaped insulator 11 is sandwiched between the strip-shaped conductors 10, insulation between the strip-shaped conductors 10 is maintained. In this way, by applying the alternately laminated strip-shaped conductors 10 and strip-shaped insulators 11 to the power mobile cable 5b, the conductor cross-sectional area is increased, and the gap between the conductors becomes smaller. Thereby, an increase in the cross-sectional area of the outer covering 9 between the conductors can be suppressed, and the entire mobile cable 5b is lighter and more compact. In addition, since the entire mobile cable 5b is thin and light, the number of steel cores 8 used for reinforcement support can be reduced. Thereby, the weight of the mobile cable 5b can be further reduced.

[0046] As described above, the moving cable 5b of the first embodiment is a flat cable whose one end in the longitudinal direction is fixed to the car 3 of the elevator 1. The moving cable 5b includes a plurality of strip conductors 10, a plurality of strip insulators 11, and an outer covering 9. Each strip conductor 10 is a strip of aluminum or aluminum alloy. In a plane perpendicular to the longitudinal direction of the moving cable 5b, the outer covering 9 covers the plurality of strip conductors 10 and the plurality of strip insulators 11 as a whole in a state where the strip conductors 10 and the strip insulators 11 are alternately laminated in the thickness direction.

[0047] With such a structure, it is possible to further reduce the weight of the moving cable 5b while ensuring the necessary conductor cross-sectional area. By reducing the weight of the moving cable 5b fixed to the car 3, the energy required to move the car 3 can be reduced. In addition, the strength required for the suspension means for fixing the end portion in the longitudinal direction of the moving cable 5b to the car 3 and the connection box 6 can be suppressed. Further, in the moving cable 5b, only the strip insulator 11 sandwiched between the strip conductors 10 may be provided. For example, when there are two strip conductors 10, the strip insulator 11 may be only one piece sandwiched between the two strip conductors 10.

[0048] In addition, the moving cable 5b includes a steel core 8. The steel core 8 is arranged outside the left and right sides of the plurality of strip conductors 10 in the width direction. In a plane perpendicular to the longitudinal direction, the outer covering 9 covers the steel core 8 as a whole. With such a structure, sufficient strength for supporting the self-weight of the moving cable 5b can be achieved even when the moving cable 5b is long in a high-lift elevator 1 or the like.

[0049] In addition, the plurality of strip conductors 10 and the plurality of strip insulators 11 are laminated such that the strip insulators 11 are arranged on both outer sides in the thickness direction. With such a structure, the strip conductor 10 is double-insulated by the strip insulator 11 and the outer covering 9. Thereby, sufficient insulation performance for using the moving cable 5b in the hoistway 2 can be achieved.

[0050] In addition, each strip conductor 10 is a power conductor for supplying power to the car 3. In a power cable that needs to supply a certain amount of power or more, a conductor cross-sectional area that can suppress the influence of voltage drop can be ensured. Thereby, while reducing the weight of the moving cable 5b, power transmission of a plurality of power supply systems can be performed in the same manner as in the case where copper is used for the conductor.

[0051] In addition, in the width direction, both end portions of each strip-shaped insulator 11 are located on the left and right outer sides compared to both end portions of the multiple strip-shaped conductors 10 stacked together. With such a structure, the strip-shaped conductor 10 is also surrounded by the strip-shaped insulator 11 in the width direction, so the insulation achieved by the strip-shaped insulator 11 becomes more reliable. In addition, the widths of the individual strip-shaped conductors 10 may also be different from each other. At this time, the width of each strip-shaped insulator 11 is wider than that of the strip-shaped conductor with the widest width among the strip-shaped conductors 10 stacked together. Thereby, both end portions in the width direction of each strip-shaped insulator 11 are arranged on the left and right outer sides compared to both end portions of the strip-shaped conductor 10 with the widest width among the multiple strip-shaped conductors 10 stacked together.

[0052] In addition, the moving cable 5b includes a plurality of bus bars 12. Each bus bar 12 corresponds to any one of the strip-shaped conductors 10. Each bus bar 12 is connected to the corresponding strip-shaped conductor 10 at the end portion in the length direction of the moving cable 5b. Each bus bar 12 protrudes from the corresponding strip-shaped conductor 10 toward the thickness direction. The plurality of bus bars 12 are arranged at different positions in the width direction. With such a structure, at the end portion of the moving cable 5b, it is possible to easily perform input and output of electric power with respect to each strip-shaped conductor 10. In addition, the plurality of bus bars 12 are arranged staggeredly from each other, so it is difficult for contact between the bus bars 12 to occur.

[0053] Summarizing the above description, the structures that can adopt the technology of the present disclosure include the following various structures shown as appendices.

[0054] (Appendix 1)

[0055] A moving cable, which is a flat moving cable whose one end in the length direction is fixed to an elevator car, the moving cable comprising:

[0056] A plurality of strip-shaped conductors, which are strips of aluminum or aluminum alloy;

[0057] One or more strip-shaped insulators; and

[0058] An outer covering, in a plane perpendicular to the length direction, the outer covering integrally covers the plurality of strip-shaped conductors and the one or more strip-shaped insulators in a state where the strip-shaped conductors and the strip-shaped insulators are alternately stacked in the thickness direction perpendicular to the length direction.

[0059] (Appendix 2)

[0060] The moving cable according to Appendix 1, wherein

[0061] The moving cable includes a steel core, and the steel core is arranged on both outer sides of the plurality of strip-shaped conductors in the width direction perpendicular to the length direction and the thickness direction.

[0062] In a plane perpendicular to the length direction, the outer covering skin covers the steel core entirely.

[0063] (Supplementary Note 3)

[0064] The moving cable according to Supplementary Note 1 or 2, wherein

[0065] The plurality of strip conductors and the one or more strip insulators are laminated in such a manner that the strip insulators are arranged on both outer sides in the thickness direction.

[0066] (Supplementary Note 4)

[0067] The moving cable according to any one of Supplementary Notes 1 to 3, wherein

[0068] The plurality of strip conductors are respectively power conductors for supplying power to the car.

[0069] (Supplementary Note 5)

[0070] The moving cable according to any one of Supplementary Notes 1 to 4, wherein

[0071] In the width direction perpendicular to the length direction and the thickness direction, both end portions of each of the one or more strip insulators are located at positions outside the end portions of the plurality of strip conductors.

[0072] (Supplementary Note 6)

[0073] The moving cable according to any one of Supplementary Notes 1 to 5, wherein

[0074] The moving cable includes a plurality of bus bars, each of which corresponds to any one of the plurality of strip conductors and is connected to the corresponding strip conductor at the end portion in the length direction.

[0075] (Supplementary Note 7)

[0076] The moving cable according to Supplementary Note 6, wherein

[0077] The plurality of bus bars respectively protrude from the corresponding strip conductors in the thickness direction and are arranged at different positions in the width direction perpendicular to the length direction and the thickness direction.

Claims

1. A moving cable, which is a flat moving cable having one end in the length direction fixed to an elevator car, the moving cable comprising: A plurality of strip conductors, which are strips of aluminum or aluminum alloy; one or more pieces of tape insulation; and The outer covering covers the plurality of strip conductors and the one or more strip insulators as a whole in a state where the strip conductors and the strip insulators are alternately stacked in a thickness direction perpendicular to the longitudinal direction in a plane perpendicular to the longitudinal direction.

2. The mobile cable according to claim 1, wherein: The movable cable includes a steel core, which is arranged on both outer sides of the plurality of strip conductors in a width direction perpendicular to the length direction and the thickness direction. The outer covering covers the entire steel core in a plane perpendicular to the longitudinal direction.

3. The mobile cable according to claim 1 or 2, wherein: The plurality of strip-shaped conductors and the one or more strip-shaped insulators are stacked in a manner such that the strip-shaped insulators are arranged on both outer sides in the thickness direction.

4. The mobile cable according to claim 1 or 2, wherein: Each of the plurality of strip-shaped conductors is a power conductor for supplying electric power to the car.

5. The movable cable according to claim 1 or 2, wherein: In a width direction perpendicular to the longitudinal direction and the thickness direction, both ends of each of the one or more strip-shaped insulators are located outside both ends of the plurality of strip-shaped conductors.

6. The movable cable according to claim 1 or 2, wherein: The traveling cable includes a plurality of bus bars, each of which corresponds to one of the plurality of strip-shaped conductors and is connected to a corresponding strip-shaped conductor of the plurality of strip-shaped conductors at an end in the longitudinal direction.

7. The movable cable according to claim 6, wherein: The plurality of bus bars protrude from corresponding strip-shaped conductors among the plurality of strip-shaped conductors toward the thickness direction, and are arranged at different positions from each other in a width direction perpendicular to the length direction and the thickness direction.

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