JPH04345484A - Flat elevator cable - Google Patents

Abstract

PURPOSE:To prevent passengers from being confined within a cage as well as to prevent the occurrence of fire by preventing the occurrence of interphase short circuiting at the time of disconnection. CONSTITUTION:A driving wire core group 4 is divided into respective phases with driving wire cores 3 twisted by phase, and each space is concurrently provided between the different phases of the respective driving core group 4, so that each bulkhead 5 made of sheath 1 is interposed between the respective phases.

Description

[Detailed description of the invention]

0001

FIELD OF INDUSTRIAL APPLICATION The invention according to claims 1 to 3 relates to a flat elevator cable for supplying motive power to a drive source mounted on an elevating body such as a car or a counterweight.

0002

2. Description of the Related Art When a driving source such as a linear induction motor or a hoisting motor is mounted on a lifting body such as an elevator car or a counterweight, it is necessary to supply power to the driving source. Conventionally, as such a power supply cable, a flat elevator cable or a round elevator cable as shown in Japanese Unexamined Patent Publication No. 193305/1988 has been used.

FIG. 4 is a cross-sectional view of an example of a conventional flat elevator cable. In the figure, a plurality of driving wire core groups 2 are arranged in a row in the cable width direction within a sheath 1 made of, for example, a rubber material. Each drive core group 2 is
It is constructed by twisting a plurality of driving wire cores 3 into each block. Each driving wire core 3 is made of twisted copper wires covered with vinyl, and the R phase, S phase, and T phase of three-phase alternating current are assigned as shown in the figure.

[0004] Generally, an elevator in which a driving source is mounted on the elevating body requires a large current as a power source. On the other hand, in the conventional flat elevator cable as described above, the distance between the machine room and the car or counterweight is long, and bending resistance is required, so the cross-sectional area is 0.75.
Since the driving wire core 3 of ~2 mm2 is frequently used, the voltage drop is large. Therefore, a large number of driving wire cores 3 are connected in parallel and wired.

[0005]

[Problems to be Solved by the Invention] In the conventional flat elevator cable configured as described above, the R phase and S phase, and the S phase and T phase coexist in the same drive core group 2. Therefore, if the drive core 3 breaks in the sheath 1 due to repeated bending or a hooking accident due to the lifting and lowering of the elevator, there is a risk of a short circuit between phases, resulting in passengers being trapped in the car or a fire. There were problems such as the danger that this could occur.

[0006] The inventions according to claims 1 to 3 have been made with the aim of solving the above-mentioned problems, and it is possible to prevent the occurrence of short circuit between phases when a wire core is disconnected. The purpose is to obtain a flat elevator cable that can be used.

[0007]

[Means for Solving the Problems] In the flat elevator cable of the invention according to claim 1, the drive cores are twisted together for each phase, thereby dividing the drive core group into each phase. In the flat elevator cable of the invention according to claim 2, the driving wire core groups are divided into each phase by twisting the driving wire cores for each phase, and the intervals are created between the driving wire core groups of different phases. A partition wall formed by a sheath is interposed between each phase. In the flat elevator cable of the invention according to claim 3, the driving wire core group is divided into each phase by twisting the driving wire cores together for each phase,
Further, another core group is arranged between the drive core group and a partition wall formed by a sheath.

[0008]

[Operation] In the invention according to claim 1, by dividing the drive core group for each phase, wire cores of different phases are prevented from coming close to each other in the same core group, and thereby, in the event of a wire breakage, Prevent phase-to-phase short circuits. In the invention according to claim 2, by dividing the drive core group for each phase, cores of different phases are prevented from coming close to each other within the same core group, thereby preventing short circuits between phases in the event of wire breakage. Furthermore, a partition wall is provided between drive core groups of different phases to more reliably prevent inter-phase short circuits. In the invention according to claim 3, by dividing the drive core group for each phase, wire cores of different phases are prevented from coming close to each other within the same core group, thereby preventing short circuits between phases in the event of wire breakage. By interposing a partition between the drive core group and other core groups, the influence of noise generated from the power source on the other core groups is reduced.

[0009]

Embodiments Hereinafter, embodiments of the invention according to claims 1 to 3 will be described with reference to the drawings. FIG. 1 is a sectional view of a flat elevator cable according to an embodiment of the invention according to claim 1. In the figure, the drive cores 3 are aligned for each phase, so that the drive core group 4 consists of three phases: an R-phase core group 4a, an S-phase core group 4b, and a T-phase core group 4c. They are arranged separately for each phase.

[0010] In such a flat elevator cable, since the drive core group 4 is separated for each phase, even if the drive core 3 should break, a short circuit between phases can be prevented. . Furthermore, it is easy to change the color of the driving wire cores 3 for each core group 4, that is, for each phase, thereby preventing short circuits between phases due to incorrect wiring connections.

Next, FIG. 2 is a sectional view of a flat elevator cable according to an embodiment of the invention according to claim 2. In the figure, a predetermined interval X is provided between the R-phase core group 4a and the S-phase core group 4b, and between the S-phase core group 4b and the T-phase core group 4c, and the sheath A first partition wall 5 of 1 is interposed in each case. In such a flat elevator cable, since the partition wall 5 is interposed between the drive core groups 4a to 4c of different phases, short circuit between phases at the time of wire breakage can be more reliably prevented.

Next, FIG. 3 is a sectional view of a flat elevator cable according to an embodiment of the invention according to claim 3. In the figure, within the sheath 1, a control core group 6, which is another core group, is arranged at a predetermined interval Y from the R-phase core group 4a, and a T-phase core group A communication core group 7, which is another core group, is arranged at a predetermined interval Y with respect to 4c. A second partition 8 formed by the sheath 1 is interposed between the R-phase core group 4a and the control core group 6, and between the T-phase core group 4c and the communication core group 7. There is.

In such a flat elevator cable, the control core group 6 and the communication core group 7 are connected to the second partition wall 8.
Since the drive core group 4 is separated from the drive core group 4, the control core group 6 and the communication core group 7 are separated from the noise generated from the power source.
It is possible to minimize the impact on

[0014] In each of the above embodiments, one driving wire core group 4 is arranged for each phase, but two or more driving wire core groups 4 may be arranged. In this case, there is no need to provide a partition between the drive core groups of the same phase. Further, the number of cores in each drive core group 4 is not particularly limited either.

[0015]

As explained above, in the flat elevator cable of the invention according to claim 1, the driving wire core group is divided into each phase by twisting the driving wire cores together for each phase. Cores of different phases are prevented from coming close to each other within the same core group, which prevents short circuits between phases in the event of wire breakage, and also makes it easy to change the color of the drive core for each phase. Therefore, it is possible to prevent short circuits between phases due to incorrect connection. Further, in the flat elevator cable of the invention according to claim 2, by twisting the driving wire cores together for each phase, the driving wire core groups are divided for each phase, and the driving wire core groups of different phases are separated. Since the space is provided and a partition wall formed by a sheath is interposed between each phase, in addition to the effect of the invention according to claim 1,
This also has the effect of more reliably preventing short circuits between phases when a wire is disconnected. Further, in the flat elevator cable of the invention according to claim 3, by twisting the driving wire cores together for each phase, the driving wire core group is divided into each phase, and a sheath is provided between the driving wire core group. Since the other core groups are arranged through the partition wall, in addition to the effect of the invention according to claim 1, it is possible to reduce the influence of noise generated from the power source on the other core groups. It also has this effect.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a flat elevator cable according to an embodiment of the invention according to claim 1.

FIG. 2 is a sectional view of a flat elevator cable according to an embodiment of the invention according to claim 2.

FIG. 3 is a sectional view of a flat elevator cable according to an embodiment of the invention according to claim 3.

FIG. 4 is a cross-sectional view of an example of a conventional flat elevator cable.

[Explanation of symbols]

1 Sheath 3 Drive core 4 Drive core group 5 First bulkhead 6 Control core group (other core group) 7 Communication core group (other core group) 8 Second bulkhead

Claims (3)

[Claims] [Claim 1] A flat elevator cable, in which a plurality of driving wire core groups made by twisting together a plurality of driving wire cores are arranged in a sheath, and which supplies power to a driving source mounted on an elevator elevating body. A flat elevator cable, wherein the drive core group is divided into each phase by twisting the drive cores together for each phase. 2. The flat elevator cable according to claim 1, further comprising a partition wall formed by a sheath between drive core groups of different phases. 3. The flat elevator cable according to claim 1, wherein another core group is arranged between the driving core group and a partition wall formed by a sheath.