JP2012153458A - Elevator device and rope inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rope inspection device that diagnoses the presence of contact between schenkels (wire bundle groups), by making an independent current flow into each schenkel for composing a resin coated rope, respectively, and to provide an elevator device with the same.SOLUTION: This invention includes elevating bodies 3 and 4, a rope 1, and a hoisting machine. The rope 1 includes a core that is composed of resin and disposed at a center, a plurality of schenkels composed by twisting strands of a conductor, and an outer layer resin for covering the outer circumference of the plurality of schenkels and the core. The rope inspection device is provided for installing a connector 7 at an end of the rope, for making the independent current flow to each of the schenkels through a conductor wire 9, and for detecting a state of the current to detect the contact between the schenkels.

Description

  The present invention relates to an elevator apparatus provided with a rope inspection device and a rope inspection device thereof.

  A conventional rope type elevator hangs a wire rope on a sheave attached to a hoisting machine, hangs a car on one side around the sheave, and suspends a counterweight for balancing the car and the other side, making it a slid type It has a structure that moves up and down. Generally, a wire rope is formed by further twisting a strand of wires (hereinafter referred to as a strand) formed by twisting steel strands. This wire rope damage is caused by repeated bending of the rope on the sheave or pulley. The type of damage caused by this bending and the process leading to the rope breakage will be described below. There are bending fatigue failure of the wires caused by repeated bending of the rope, wear of the wires due to sliding between the strands, and wear of the wires due to contact with the sheave. Due to these damages, the strands of the constituent elements are first broken, and when the number of strand breaks increases, the strands break. When the number of strand breaks further increases, the rope will eventually break. In this way, the broken part of the wire increases as the number of bends increases. Therefore, the broken part of the wire is checked by visual inspection or an inspection device through periodic inspections to diagnose whether the wire rope can be used safely. ing.

  Recently, in order to reduce the sheave diameter and extend the life of the rope, a rope in which a wire rope is coated with a resin (hereinafter referred to as a resin-coated rope) has been proposed. This rope gains flexibility by reducing the diameter of the element wire. The resin-coated rope is formed by further twisting strands obtained by twisting strands to form a strand bundle group (hereinafter referred to as Schenkel), and twisting the Schenkel. Moreover, resin is filled between each Schenkel, and the Schenkel mutually prevents contact. Furthermore, the outer layer is covered with a resin to prevent contact between the strand and the sheave, thereby extending the life (see, for example, Patent Document 1).

  As an inspection apparatus for an elevator using the resin-coated rope, an apparatus that detects contact between Schenkels, which is one of the causes of wire breakage, has been proposed. This electrically connects non-adjacent schenkels, and detects contact between adjacent schenkels based on the presence or absence of electrical continuity. When contact between Schenkels occurs, an alarm provided in the monitoring center is activated and reported to the inspector (for example, see Patent Document 2).

  In addition, a method has been proposed in which a current is passed through a flat elevator rope covered with a steel wire cord with a resin jacket, and strand damage is inspected from the response of the resistance value of the rope (for example, see Patent Document 3).

  In the above-described flat elevator rope, a connector that establishes an electrical connection between a controller that applies an electrical signal and a steel wire cord has been proposed (for example, see Patent Document 4).

JP 2006-28671 A Japanese Patent Application No. 2007-322701 Special Table 2002-540419 Special table 2007-529391

  As described above, for resin-coated ropes used in elevators, there has been proposed a rope inspection device that detects contact between schenkels inside the rope by the presence or absence of electrical continuity between the schenkels constituting the rope. In order to pass a current through Schenkel, it is necessary to electrically connect the resin-coated rope and the rope inspection device.

  The flat type elevator ropes shown in Patent Literature 3 and Patent Literature 4 have a structure in which an electrical signal is applied to parallel cords to detect cord damage. However, in a round rope such as a resin-coated rope, since each schenkel rotates spirally in the circumferential direction of the rope, it is difficult to pass an electric current through the schenkel through the rope circumferential direction. Moreover, in the rope which the steel wire was coat | covered with resin as shown to patent document 1 and patent document 3, the deformation | transformation of a rope by the shear force which goes to a center direction from the rope circumferential direction by a cutting device by rope cutting at the time of rope installation work As a result, contact may occur between adjacent schenkels or between steel wire cords at the rope cut surface. When contact between schenkels occurs on the rope cut surface, it becomes impossible to detect contact between schenkels inside the resin-coated rope.

  The objective of this invention is providing the rope inspection apparatus which diagnoses the presence or absence of the contact between Schenkel, and an elevator apparatus provided with the same by flowing an independent electric current through each Schenkel constituting the resin-coated rope.

  In order to achieve the above object, an elevator apparatus according to the present invention includes an elevator body, a rope for suspending the elevator body, and a hoisting machine for driving the rope, wherein the rope is made of resin. A core configured and disposed in the center; a plurality of schenkels formed by twisting strands of conductors; and an outer layer resin that covers an outer periphery of the core and the plurality of schenkels. Covered with an outer layer resin in a state of being arranged radially and twisted around the core so as not to come into contact, and a socket is installed at the end of the rope, and an insertion provided on the rope cutting surface side of the socket A wedge member is attached to the core of the rope cut surface from a hole to ensure insulation between the plurality of schenkels on the rope cut surface, and the plurality of schenkels The contact member is inserted into a contact member insertion hole provided on the rope peripheral surface side of the socket with respect to each of the sockets, and the outer layer resin is penetrated to contact the schenkel and the contact member. And a rope inspection device for detecting contact between the schenkels by detecting the state of the current by flowing an independent current to each of the schenkels via the conductors. .

  The rope inspection apparatus of the present invention includes a lifting body, a rope for suspending the lifting body, and a hoisting machine for driving the rope, and the rope is made of resin and has a core disposed at the center. And a plurality of Schenkels formed by twisting strands of conductors, and an outer layer resin that covers the core and the outer periphery of the plurality of Schenkels, the plurality of Schenkels around the core so that they do not contact each other In a rope inspection apparatus used for an elevator apparatus that is radially arranged and covered with an outer layer resin in a twisted state, a socket installed at an end of the rope and an insertion provided on the rope cutting surface side of the socket A wedge member that is attached to the core of the rope cut surface from a hole to ensure insulation between the plurality of schenkels on the rope cut surface; and the plurality of shells A contact member that is inserted into a contact member insertion hole provided on the rope peripheral surface side of the socket with respect to each of the kels and passes through the outer layer resin to come into contact with each of the schenkels, and is connected to the contact member. And conducting a current independent to each of the schenkels through the conductors to detect the state of the currents to detect contact between the schenkels.

  The rope inspection apparatus according to the present invention and the elevator apparatus using the rope inspection apparatus can detect a contact between adjacent schenkels in the rope by the rope inspection apparatus because an independent current can flow through each schenkel. As a result, it is possible to grasp the grace period until the rope replacement and improve the reliability of the rope maintenance.

The block diagram of the elevator with a rope inspection apparatus of one Embodiment of the elevator apparatus which concerns on this invention. The rope sectional view of one embodiment of the elevator device concerning the present invention. The rope cut surface figure explaining the contact between Schenkel of one Embodiment of the elevator apparatus which concerns on this invention. The rope internal sectional view explaining the contact between Schenkel of one embodiment of the elevator apparatus according to the present invention. The block diagram of the connector of one Embodiment of the elevator apparatus which concerns on this invention. The connector sectional view of one embodiment of the elevator apparatus concerning the present invention. The top view after the connector connection of one Embodiment of the elevator apparatus which concerns on this invention. Sectional drawing after the connector connection of one Embodiment of the elevator apparatus which concerns on this invention. The figure explaining the connection confirmation after the connector connection of one Embodiment of the elevator apparatus which concerns on this invention.

  Hereinafter, an embodiment of an elevator apparatus with a rope inspection apparatus according to the present invention will be described with reference to the drawings.

  FIG. 1 is a configuration diagram of an elevator apparatus with a rope inspection apparatus according to an embodiment of the elevator apparatus according to the present invention. A resin-coated rope 1 is hung on a sheave 2 attached to a hoisting machine, a car 3 is hung on one side around the sheave, a counterweight 4 is suspended on the opposite side to balance the car and the resin-coated rope 1 Is supported by the building via the rope support socket 5 and the thimble rod 6, the rope inspection device body 8 is provided on the resin-coated rope end 101 via the connector 7. As described above, in the elevator apparatus according to the present embodiment, the car 3 and the counterweight 4 that are lifting bodies are suspended by the resin-coated rope 1. The resin-coated rope is configured to be driven by the rotation of the sheave 2 attached to the hoisting machine so as to raise and lower the elevating body in the hoistway.

  The rope inspection apparatus main body 8 and the connector 7 are connected by a conductive wire 9, and the rope inspection apparatus main body 8 and the customer center 10 are connected by a communication network. Thereby, the resin-coated rope 1 is monitored by the customer center 10. When contact between Schenkels is detected, it is reported to a rope inspector, and a precise rope inspection is performed by a device using leakage magnetic flux to ensure the safety of the resin-coated rope 1.

  FIG. 2 is a rope sectional view of an embodiment of the elevator apparatus according to the present invention. The resin-coated rope 1 is formed by further twisting a strand 103 formed by twisting metal strands 102 to form a schenkel 104, and further twisting the schenkel around an inner layer resin 105 made of polyurethane, for example. Further, the outer periphery of the schenkel 104 is covered with an outer layer resin 106 made of polyurethane, for example, to prevent contact between the schenkel and the sheave. Thus, each Schenkel is individually covered and protected by a resin and usually does not contact each other.

  As described above, the resin-coated rope 1 according to this embodiment includes an inner layer resin 105 as a core that is made of resin and disposed in the center, and a plurality of Schenkels 104 that are formed by twisting the metal strands 103 that are conductors. The inner layer resin 105 serving as the core and the outer layer resin 106 covering the outer periphery of the plurality of schenkels 104, and the plurality of schenkels 104 are arranged radially and twisted around the inner layer resin 105 serving as the core so as not to contact each other. In this state, it is covered with the outer layer resin 106.

  The damage of the resin-coated rope 1 occurs when the resin-coated rope is repeatedly bent on the sheave or the pulley. The type of damage caused by this bending and the process leading to the rope breakage will be described below. Bending fatigue failure of the strands 102 caused by repeated bending of the rope, wear of the strands 102 due to slippage between the strands 103, wear of the outer layer resin 106 due to friction with the sheaves, and strands due to occurrence of slippage between the Schenkels 104 There is 102 wear. These damages initially break the component wires. As the number of strand breaks increases, the strand breaks, followed by a Schenkel break and finally a rope break.

  Here, the mechanism leading to the occurrence of Schenkel mutual slip and the subsequent Schenkel breakage will be described below. When the rope is bent, a relative slip occurs between the inner layer resin 105 filled between the schenkels and the schenkel, and the inner layer resin 105 is worn. As the number of bends increases, the wear amount of the inner layer resin 105 increases. As a result, in the inner layer resin 105, the cross-sectional area is reduced and the cross-sectional shape is broken, so that adjacent schenkels 104 come into contact with each other. When the resin-coated rope 1 is bent in a state where the schenkels 104 are in contact with each other, a relative slip with contact occurs between the schenkels. As a result, the strands 102 constituting the schenkel are worn.

  Wear of the inner layer resin 105 that is the cause of this damage mode is wear between the metal and the resin and cannot be avoided. Furthermore, since oil is not applied to each schenkel constituting the resin-coated rope 1, mutual slip between the schenkels, that is, friction with direct contact between metals occurs. Since the contact pressure between the strands 102 due to this contact is higher than the contact between the strands 102 in Schenkel, the wear rate of the strands 102 is high, and the speed until the rope breaks depends on other damage modes. Faster than Therefore, it is necessary to construct a maintenance method for preventing the rope breakage accompanying the Schenkel contact. Therefore, a maintenance method that first detects contact between Schenkels, which is a precursor of rope internal damage, and detects strand breaks by periodic inspection after the occurrence of Schenkel contact is an effective means for guaranteeing the safety of the resin-coated rope.

  FIG. 3 is a rope cutaway view for explaining Schenkel contact in an embodiment of the elevator apparatus according to the present invention. When the resin-coated rope 1 is cut with a hydraulic rope cutter or the like during installation of the elevator apparatus, compressive force and shearing force act on the rope cut surface. Although the rope is cut by the shearing force, the inner layer resin 105 and the outer layer resin 106 are deformed by the compressive force, and contact may occur between the adjacent schenkels 104 on the rope cutting surface 107. Such contact at the rope cut surface may occur regardless of the rope life, and means for preventing contact between the schenkels 104 at the cut surface is required.

  FIG. 4 is a cross-sectional view of the inside of the rope for explaining the contact between the shekels in one embodiment of the elevator apparatus according to the present invention. Here, the contact between the schenkels 104 inside the resin-coated rope that has a significant influence on the life of the rope with respect to the contact at the cut surface will be described. After the elevator apparatus is operated, wear of the inner layer resin 105 of the resin-coated rope inner cross section 108 proceeds as the number of sheave passages increases. As a result, in the inner layer resin 105, the cross-sectional area is reduced and the cross-sectional shape is broken, and contact occurs between the adjacent schenkels 104 of the resin-coated rope internal cross-section 108.

  FIG. 5 is a configuration diagram of a connector of an embodiment of the elevator apparatus according to the present invention. The rope inspection apparatus according to the present embodiment has a structure for detecting contact between the schenkels 104 inside the resin-coated rope while achieving good insulation between the schenkels 104 at the rope cut surface. The connector 7 includes a socket 701, a screw-like wedge member 706, and a contact screw 707 as a contact member. The socket 701 has a shape that covers the rope end 101 of the resin-coated rope 1. That is, it is a shape that covers the rope cut surface 107 and the peripheral surface portion of the resin-coated rope 1 for a predetermined length from the cut surface. Further, on the rope cut surface side of the socket 701, a wedge insertion hole 702 into which the wedge member 706 is inserted and a positioning hole 703 for confirming the position of the schenkel 104 on the rope cut surface 107 are in contact with the rope peripheral surface side of the socket 701. A screw hole 704 that is a contact member insertion hole into which the screw 707 is screwed is provided.

  FIG. 6 is a connector cross-sectional view of an embodiment of the elevator apparatus according to the present invention, and represents a cross section taken along the line AA of FIG. As shown in the figure, in addition to the above-described configuration, the socket 701 is processed with a female screw 711, a conductive wire insertion hole 709 into which the conductive wire 9 is inserted, and a reference line 705 for determining the position of the screw hole 704 shown in FIG. The wedge insertion hole 702 is processed at a position that is coaxial with the inner layer resin 105. Each positioning hole 703 is processed at a position that is coaxial with each Schenkel 104. The reference line 705 is processed at a position on a line connecting the center of the wedge insertion hole 702 and the center of the positioning hole 703. Further, when the Schenkel pitch length of the rope is L, the screw hole 704 is h = nL away from the rope cut surface 107 in the vertical direction, and θ = 360 ° × n (n is a rational number) from the reference line 705 in the circumferential direction. , Processed into a position rotated in the Schenkel twist direction.

  As shown in FIG. 6, the resin-coated rope end 101 is inserted into the socket 701 from the rope insertion port 710 and inserted into the step 708 until the rope cut surface 107 comes into contact. At this time, the socket 701 is arranged so that each schenkel 104 of the rope cut surface 107 and the positioning hole 703 are coaxial. The wedge member 706 is inserted from the wedge insertion hole 702, the contact screw 707 is inserted from the screw hole 704, and the conductor 9 is inserted from the conductor insertion hole 709. Further, a terminal 901 is connected to the tip of the conducting wire 9, and the conducting screw 9 is fixed to the connector 7 when the contact screw 707 passes through the terminal 901, and at the same time, contacts with the contacting screw 707 and can be electrically connected to each Schenkel 104. It becomes.

  FIG. 7 is a plan view of the elevator apparatus according to the embodiment of the present invention after the connector is connected. To connect the connector 7 and the resin-coated rope end 101, first, the socket 701 is arranged so that the positioning holes 703 and the schenkels 104 of the rope cutting surface 107 are coaxial. Thereby, each schenkel of the rope cut surface 107 and each schenkel of the rope cross section at the position of the screw hole 704 are arranged coaxially. Next, the wedge member 706 is screwed into the inner layer resin 105 of the rope cutting surface 107 from the wedge insertion hole 702, and finally each contact screw 707 is screwed from each screw hole 704 to a position where it comes into contact with each Schenkel.

  FIG. 8 is a cross-sectional view of the elevator apparatus according to an embodiment of the present invention after the connector is connected, and represents a cross section taken along the line AA of FIG. The rope cut surface 107 contacts the step 708 of the socket 701. The wedge member 706 is screwed into the inner layer resin 105 of the rope cut surface 107 through the wedge insertion hole 702. Then, the inner layer resin 105 as the core expands the inner layer resin 105 in a direction in which the wedge member 706 expands from the center of the inner layer resin 105 toward the outer peripheral direction, thereby separating the schenkels 104 from each other, and at the rope end of each schenkel 104 It is easy to ensure insulation at a certain rope cut surface 107. Further, by screwing the wedge member 706 into the inner layer resin 105, the inner layer resin 105 is protruded from the rope cut surface 107 into the space 712. Thereby, the inner layer resin 105 protrudes from the rope cut surface 107, a gap between the schenkels can be secured in the shape of the inner layer resin 105, and insulation at the rope cut surface between the schenkels is secured. Further, in the case of a rope with a Schenkel pitch length of L, it is h = nL from the rope cut surface 107 in the vertical direction, and θ = 360 ° × n (n is a rational number) from the reference line 705 in the circumferential direction in the Schenkel twist direction. A contact screw 707 is disposed at the rotated position. The contact screw 707 is screwed into the outer layer resin 106 via the terminal 901 and comes into contact with the schenkel 104. Thereby, the Schenkel and the conductive wire 9 are electrically connected.

  Thus, as described above, the connector 7 is provided on one end side of the resin-coated rope 1 and the conductor 9 is connected to connect to the inspection apparatus body 8. Further, as shown in FIG. 1, a socket 701 and a wedge member 706 are provided on the other end side of the resin-coated rope 1. That is, at the end of the resin-coated rope on the other end side, like the one end side, the socket 701 is arranged so that each positioning hole 703 and each schenkel 104 of the rope cutting surface 107 are coaxial, and then the wedge member 706 is wedged. It is screwed into the inner layer resin 105 of the rope cut surface 107 from the insertion hole 702. In this way, insulation between the schenkels 104 is ensured at the rope cut surfaces at both ends of the resin-coated rope 1, so that when the schenkels 104 come into contact with each other, the contact is accurately detected. become able to.

  FIG. 9 is a view for explaining connection confirmation after connector connection of an embodiment of the elevator apparatus according to the present invention. The current input from the rope inspection device main body 8 passes through the conductor 9 and flows to each Schenkel through the contact screw 707. However, if the Schenkel pitch dimension error due to a rope manufacturing error or the position of the inner layer resin deviates from the center, the contact screw 707 may not be connected to each Schenkel. Therefore, in order to check whether or not current flows through each Schenkel independently, by connecting one terminal of the tester 11 to the Schenkel 104 through the positioning hole 703 and connecting the other terminal to the contact screw 707, Check if the current corresponding to one-to-one is flowing in each Schenkel. Such an inspection is performed for each Schenkel 104, and insulation between the Schenkels 104 is ensured immediately after installation, and each Schenkel 104 and the rope inspection device main body 8 are securely connected via the conductor 9. Check that it is connected.

  After such confirmation is completed, the rope inspection device detects contact between Schenkel 104, which is one of the causes of wire breakage, and monitors it as an early sign of the step leading to rope breakage. It is possible to deal with it before it occurs.

  As described above, the rope inspection apparatus according to the present embodiment includes the socket 701 installed at the end of the resin-coated rope 1, the wedge member 706, the contact screw 707 as the contact member, and the conductor 9, and the rope inspection. An independent current is supplied from the apparatus main body 8 to each of the schenkels 104 through the lead wires 9 to detect the state of the currents, thereby detecting contact between the schenkels. That is, the rope and the rope inspection device main body 8 are connected by the connector 7 having a mechanism for flowing an independent current to each of the schenkels so as to prevent contact between the skelkels on the rope cut surface. Monitor inter-contact.

  In addition, as a monitoring method, a rope inspection apparatus may be operated from a customer center at regular intervals to monitor the contact between Schenkels, or the rope inspection apparatus may be constantly operated to constantly monitor. Furthermore, other methods may be used and the monitoring method is not particularly limited.

  In addition, as a method of flowing current, a configuration may be adopted in which a potential is applied to each Schenkel in order and a current is passed to the Schenkel that is not applied with a potential. It may be configured to detect by applying Furthermore, other detection methods may be used and the detection method is not particularly limited.

1 Resin-covered rope 2 Sheave 3 Car 4 Counterweight 5 Rope support socket 6 Thimble rod 7 Connector 8 Rope inspection device body 9 Conductor 10 Customer center 11 Tester 101 Resin-covered rope end 102 Wire 103 Strand 104 Schenkel 105 Inner layer resin 106 Outer layer resin 107 Rope cut surface 108 Resin-coated rope internal cross section 701 Socket 702 Wedge insertion hole 703 Positioning hole 704 Screw hole 705 Reference line 706 Wedge member 707 Contact screw 708 Step 709 Lead wire insertion hole 710 Rope insertion port 711 Female screw 712 Space 901 Terminal

Claims (5)

In an elevator apparatus comprising a lifting body, a rope that holds the lifting body, and a hoisting machine that drives the rope,
The rope includes a core made of resin and disposed in the center, a plurality of schenkels formed by twisting strands of a conductor, and an outer layer resin that covers an outer periphery of the wick and the plurality of schenkels, A plurality of schenkels are radially arranged around the core so as not to contact each other, and are covered with an outer layer resin in a twisted state,
A socket is installed at the end of the rope, a wedge member is attached to the core of the rope cutting surface from an insertion hole provided on the rope cutting surface side of the socket, and the plurality of schenkels on the rope cutting surface Insulation is ensured, a contact member is inserted into a contact member insertion hole provided on the rope peripheral surface side of the socket with respect to each of the plurality of schenkels, penetrates the outer layer resin, and Rope inspection in which a contact member is brought into contact, the contact member is connected to a conducting wire, an independent current is passed through each of the schenkels via the conducting wire, and the state of the current is detected to detect contact between the schenkels. An elevator apparatus provided with a device.   When the twisting pitch length of the Schenkel with respect to the core is L, the contact member insertion hole is separated from the rope cut surface by h = nL in the longitudinal direction of the rope, and θ from the reference line with respect to the rope circumferential direction. The elevator apparatus according to claim 1, wherein the elevator apparatus is provided at a position of the socket rotated in the twist direction of the Schenkel by = 360 ° × n (n is a rational number).   The elevator apparatus according to claim 2, wherein positioning holes for confirming conduction between the schenkel and the contact member on the rope cut surface are provided on the rope cut surface side of the socket.   The said socket is provided with the space for drawing out the said core from the cut surface of the said rope when the said wedge member is attached to the said core when installing in the said rope end part, The Claim 1 thru | or 3 characterized by the above-mentioned. The elevator apparatus in any one. An elevator body, a rope for suspending the elevator body, and a hoisting machine for driving the rope, wherein the rope is composed of a resin and a core disposed in the center, and a conductor strand is twisted together A plurality of schenkels and an outer layer resin that covers the core and the outer periphery of the schenkels, and the plurality of schenkels are arranged radially and twisted around the core so as not to contact each other. In the rope inspection device used for the elevator device covered with the outer layer resin,
A socket installed at the end of the rope and an insertion hole provided on the rope cutting surface side of the socket are attached to the core of the rope cutting surface to ensure insulation between the plurality of schenkels at the rope cutting surface. A wedge member and a contact member that is inserted into a contact member insertion hole provided on the rope peripheral surface side of the socket with respect to each of the plurality of schenkels and penetrates the outer layer resin to come into contact with each of the schenkels And a conductive wire connected to the contact member, passing an independent current through each of the schenkels through the conductive wire to detect the state of the current and detecting contact between the schenkels. A characteristic rope inspection device.

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