JPWO2012004867A1 - Elevator rope - Google Patents

Abstract

In an elevator apparatus, a car is suspended in a hoistway by an elevator rope. The elevator rope has a rope main body and a resin outer layer covering that is coated on the outer periphery of the rope main body. On the surface of the outer layer covering, inspection result information corresponding to the position of the inspection performed along the rope length direction at the time of manufacture is attached at a predetermined pitch.

Description

  The present invention relates to an elevator rope whose outer periphery is covered with a resin outer layer covering.

  In conventional elevator ropes, in most cases, abnormalities and damages can be visually confirmed from the appearance of the ropes, so that it was possible to carry out a certain amount of inspection before actual use. On the other hand, in an elevator rope whose outer periphery is covered with a resin-made covering, the thickness of the covering and the presence or absence of an internal disconnection cannot be visually confirmed.

  Further, in the conventional construction fiber rope, a synthetic resin coating layer is provided on the outer periphery of the fiber rope body, and the production or sales time is printed at a predetermined pitch on the surface of the synthetic resin coating layer (for example, Patent Document 1).

Utility Model Registration No. 3092239

  In the case of conventional resin-coated elevator ropes as described above, even if the thickness of the coating and the presence of internal disconnection are inspected at the time of manufacture, if an abnormal product is shipped by mistake, Since it is difficult to visually detect a certain part, an abnormality must be detected unless all ropes are inspected over the entire length during maintenance inspections or a disconnection detection device is installed to detect internal disconnection. I could not. Even if the production time is printed on the cover, it is possible to estimate the normal rope life. However, if an abnormal product is shipped by mistake, a maintenance inspection or disconnection detection device can be used. Abnormality could not be detected without installation.

  This invention is made in order to solve the above subjects, and it aims at obtaining the rope for elevators which can confirm visually the inspection result at the time of manufacture easily for every part after shipment. .

  An elevator rope according to the present invention includes a rope body and a resin outer layer covering body that is coated on the outer periphery of the rope body, and the outer surface covering body is implemented along the length of the rope during manufacture. Inspection result information corresponding to the position of the inspection is attached at a predetermined pitch.

  In the elevator rope of the present invention, inspection result information corresponding to the position of the inspection carried out along the rope length direction at the time of manufacture is attached to the surface of the outer layer covering body at a predetermined pitch. This inspection result can be easily visually confirmed for each part even after shipment.

It is a side view which shows the rope for elevators by Embodiment 1 of this invention. It is sectional drawing of the rope for elevators of FIG. It is a side view which shows the rope for elevators by Embodiment 2 of this invention. It is a side view which shows an example of the elevator apparatus with which the rope for elevators of Embodiment 1 or 2 is applied.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a side view showing an elevator rope according to Embodiment 1 of the present invention, and FIG. 2 is a sectional view of the elevator rope of FIG. In the figure, one steel core rope 1 is arranged at the center of the elevator rope. On the outer periphery of the core rope 1, a resin core rope cover 2 is provided. A plurality of (here, 8) steel core rope cords 3 are twisted around the outer circumference of the core cord sheath 2.

  A resin-made core rope covering 5 is provided on the outer periphery of the core rope / cord rope assembly 4 and the core / cord rope covering 2 composed of the eight core rope ropes 3. The core rope 6 includes a core rope 1, a core rope cover 2, a core rope rope 3, and a core rope cover 5.

  A plurality of (here, 20) steel outer layer ropes 7 are twisted around the outer periphery of the core rope covering 5. The rope body 8 includes a core rope 6 and an outer layer cord 7. A resin outer layer covering 9 is provided on the outer periphery of the rope body 8. The outer layer cord 7 and the outer layer covering body 9 are bonded with an adhesive.

  All the ropes including the core rope 1, the core rope rope 3 and the outer layer rope 7 are compressed (plastically processed) from the outer periphery by a die at the time of manufacture, and the cross-sectional shape of those strands is made irregular. Yes.

  The core rope 1 and the core rope rope 3 have a three-layer structure in which two layers of strands are bundled around the center strand. Moreover, the cross-sectional structure of the core rope 1 and the core rope rope 3 is a seal type. Further, the twist lengths of the two layers of the core rope 1 and the core rope rope 3 are equal. That is, the core rope 1 and the core rope rope 3 are constituted by parallel twists. The outer layer rope 7 has a two-layer structure in which one layer of strands is bundled around the center strand.

  Since the material of the core rope cover 2 and the core rope cover 5 needs to maintain the pressure from the core rope rope 3 and the outer layer rope 7, for example, a certain degree of hardness such as polyethylene or polypropylene Resin having is used. Moreover, the core rope covering body 2 and the core rope covering body 5 are comprised by resin bridge | crosslinked by mixing a crosslinking agent.

  Furthermore, the core rope covering body 2 and the core rope covering body 5 increase the flexibility as an elevator rope and reduce the loss that occurs when bent by a sheave. good.

  Thus, as the material of the core rope covering body 2 and the core rope covering body 5, a material that is harder than the material of the outer layer covering body 9 and has a low friction coefficient with respect to the same metal material is preferable. Furthermore, since the core rope cover 2 and the core rope cover 5 are slipped between the core rope 1, the core rope rope 3 and the outer layer rope 7, it is preferable that they have excellent wear resistance. It is.

  Since it is necessary to ensure the traction capability between the outer layer covering 9 and the sheave, the outer layer covering 9 is made of a resin having a friction coefficient of 0.2 or more with respect to the sheave and having sufficient wear resistance, for example, polyurethane. Moreover, the outer layer strand 7 is comprised by resin bridge | crosslinked by mixing a crosslinking agent.

  As shown in FIG. 2, it is preferable that the core rope cover 2 and the core rope cover 5 enter between the adjacent core rope ropes 3 and are in contact with each other as shown in FIG. . Moreover, it is preferable that the core rope covering body 5 and the outer layer covering body 9 enter between the adjacent outer layer strands 7 and are in contact with each other as shown in FIG.

  On the surface of the outer layer covering 9, inspection result information 31 corresponding to the position of the inspection performed at the time of manufacture and position information 32 in the rope length direction are attached at a predetermined pitch. The inspection result information 31 and the position information 32 are printed on the outer layer covering 9 using, for example, a printer or a laser marker.

  The inspection at the time of manufacture is performed after the outer layer covering 9 is covered in the manufacturing process or in an inspection process different from the manufacturing process. Moreover, the inspection at the time of manufacture is carried out continuously or at predetermined intervals along the rope length direction.

  The contents of the inspection include, for example, a rope diameter inspection using a laser-type outer diameter measuring device, a coating thickness inspection using an ultrasonic sensor or an eddy current sensor, and a disconnection inspection using a leakage magnetic rope tester.

  The result of each inspection is separately recorded in association with the lot number and the position in the length direction, and the outer layer covering 9 is given comprehensive determination results of all inspections. That is, “OK” is printed if all the inspection results are normal, and “NG” is printed if there is any abnormality.

  In general, an elevator rope is manufactured to a length of 2000 mm to 6000 m, and then cut to a required length according to the elevator apparatus to be used. When the inspection result information 31 is “NG”, the elevator rope is cut and commercialized while avoiding that portion. Moreover, depending on the inspection item and range in which the abnormality is detected, the entire elevator rope may not be commercialized.

  As the position information 32, the length from the end at the time of manufacturing (before cutting), that is, the manufacturing length is attached to the outer layer covering 9. In the example of FIG. 1, the manufacturing length is given every 0.1 m.

  Further, the inspection result information 31 and the position information 32 are attached to the same position in the circumferential direction of the outer layer covering body 9. That is, the inspection result information 31 and the position information 32 are attached on a straight line parallel to the axis of the elevator rope.

  In such an elevator rope, the inspection result information 31 is attached to the surface of the outer covering body 9 at a predetermined pitch, so that the inspection result at the time of manufacture can be easily visually confirmed for each part even after shipment. . Therefore, the inspection result can be rechecked from the appearance of the elevator rope at the time of inspection before delivery or installation of the elevator apparatus, not to mention before shipment but also after the product is shipped. For this reason, even when the elevator rope including the portion where the abnormality is detected is shipped accidentally for some reason, the elevator rope can be easily found.

  Further, since the position information 32 is written together with the inspection result information 31, the inspection data and the actual product can be easily collated. In addition, when there is an abnormal part or a part that needs to be inspected continuously during maintenance inspection of the elevator rope in use, immediately figure out where the position is in the elevator rope. Can do. Furthermore, when the elevator rope is cut to the required length, it is not necessary to use a special length measuring device.

  In addition, when the car stops at the landing position, it is possible to manually operate the hoisting machine by, for example, recording in advance which part of the elevator rope is located at the mark provided on the hoisting machine. Thus, when carrying out the rescue operation, the car can be accurately moved to the landing position.

  Furthermore, the inspection result information 31 and the position information 32 are put on a straight line, and the printing pitch can be reduced to some extent, so that when the car and the counterweight are suspended, the twisting condition of the elevator rope can be confirmed. .

  Here, it is desirable that the print pitch is within 2 pitches of the twist pitch of the outer layer strand 7 also for confirmation of the twist. That is, when the pitch is as short as possible, the printed line looks like a continuous line, which is suitable for checking the twist. However, in consideration of the length of printing, it is often difficult within one pitch. On the other hand, when the pitch is 3 pitches or more, it is difficult to determine whether the twist of the printing is due to the rotation of the elevator rope or the twisting or returning.

  Usually, one pitch of the outer layer strand 7 is about 6.5 times the diameter of the elevator rope. For example, if the diameter of the elevator rope is 12 mm, one pitch of twist is about 70 to 80 mm, and two pitches of twist are about 140 to 160 mm. Therefore, it can be said that the printing pitch of 100 mm shown in FIG. 1 is within a preferable range.

  Further, in the elevator rope having the outer layer covering 9, the friction coefficient between the outer layer covering 9 and the drive sheave is large, and the elevator rope does not easily slide with respect to the drive sheave. For this reason, the possibility that the inspection result information 31 and the position information 32 disappear due to wear is low. However, when printing is assumed to disappear during use due to operating conditions or the like, it is preferable to increase the printing depth of the inspection result information 31 and the position information 32 using a laser marker or the like.

  Further, in the elevator rope as described above, since only one core rope 1 is used, tension is applied during use, and it is difficult to deform when a load is applied from the core rope rope 3 to the core rope 1. The cross-sectional shape of the entire elevator rope can be stabilized, the number of steps of twisting the strands can be reduced, and manufacturing can be facilitated. Moreover, since the core rope cord 3 is not twisted directly on the outer circumference of the core cord rope 1 but twisted on the outer circumference of the core cord sheath 2, the cross-sectional shape of the core rope 6 can be made difficult to deform. This also stabilizes the cross-sectional shape of the entire elevator rope.

  Furthermore, since all the strands including the core strand 1, the core rope strand 3 and the outer layer strand 7 are not in direct contact with other strands, wear damage due to contact between the strands is prevented, and the elevator rope Long life can be achieved.

  Furthermore, the outer layer covering 9 needs to be bonded to the outer layer rope 7 in order to generate traction with the sheave, and before the outer layer covering 9 is bonded to the outer layer rope 7, It is necessary to sufficiently clean the dirt and oil adhering during the manufacture of the lasso 7. At this time, if the structure of the outer layer rope 7 is complicated, the inside of the outer layer rope 7 cannot be sufficiently cleaned. On the other hand, in Embodiment 1, since the core rope 1 and the core rope rope 3 have a three-layer structure and the outer layer rope 7 has a two-layer structure, the outer layer element is secured while ensuring sufficient strength. The rope 7 can be washed sufficiently and easily, and the outer layer covering 9 can be firmly adhered to the outer layer cord 7.

  Moreover, since the core rope covering body 2 and the core rope covering body 5 are made of a crosslinked resin material, the use in a high temperature environment or the temperature rise due to the bending acting continuously, The durability can be improved and the life can be extended.

  Further, since the outer layer covering 9 is also made of a crosslinked resin material, durability is increased and life is increased against use in a high temperature environment or temperature rise due to continuous bending. You can plan. Moreover, strength reduction can be prevented against temperature rise due to slip between the sheave and the elevator rope during emergency braking, and sufficient deceleration performance can be maintained.

Embodiment 2. FIG.
3 is a side view showing an elevator rope according to Embodiment 2 of the present invention. In the drawing, in addition to the inspection result information 31 and the position information 32, manufacturing information 33 is also written on the surface of the outer layer covering 9. Examples of the manufacturing information 33 include a manufacturer name, a lot number, and a manufacturing date / time.

  Further, the manufacturing information 33 is printed at the same pitch as the inspection result information 31 and the position information 32 in the rope length direction. Further, the manufacturing information 33 is printed in a shifted position in the circumferential direction of the outer layer covering 9 from the inspection result information 31 and the position information 32. Other configurations are the same as those in the first embodiment.

  In such an elevator rope, the manufacturing information 33 is attached to the outer layer covering 9 at a predetermined pitch in the rope length direction, so that the manufacturing information can be visually confirmed without providing a separate data plate. can do.

The cross-sectional structure of the elevator rope according to the present invention is not limited to the structure shown in FIG. For example, a structure in which the core rope 1 is not deformed, a structure in which the number of the core rope rope 3 and the outer layer rope 7 is reduced (for example, core rope rope 6: outer layer rope 16 :), core A two-layer structure in which the rope cord 3 and the core rope covering 5 are omitted may be used.
In the first and second embodiments, the elevator rope having a circular cross section is shown. However, the elevator rope referred to in the present invention is broad, and includes a rope having a flat cross section, that is, a belt.

  Furthermore, in the first and second embodiments, the overall result of all the inspections is attached to the outer covering 9 as the inspection result information 31. However, the inspection result information 31 is such that the result of each inspection can be understood. May be. In this case, if the inspection results are encoded and displayed in a predetermined sequence, the inspection result information 31 can be displayed in a compact manner. For example, the results of the rope diameter inspection, the coating thickness inspection, and the disconnection inspection described above can be represented by a three-digit number “0” if there is no abnormality and “1” if there is an abnormality. In addition, the presence or absence of abnormality can also be represented by a sequence of symbols such as “◯” or “x”.

  Here, FIG. 4 is a side view showing an example of an elevator apparatus to which the elevator rope of Embodiment 1 or 2 is applied. In the figure, a machine room 12 is provided in the upper part of the hoistway 11. A machine table 13 is installed in the machine room 12. A hoisting machine 14 is supported on the machine base 13. The hoisting machine 14 includes a drive sheave 15 and a hoisting machine main body 16. The hoisting machine body 16 includes a hoisting machine motor that rotates the driving sheave 15 and a hoisting machine brake that brakes the rotation of the driving sheave 15.

  A deflecting wheel 17 is attached to the machine base 13. A plurality of elevator ropes 18 as suspension means are wound around the drive sheave 15 and the deflecting wheel 17. A portion closer to the counterweight 10 than the drive sheave 15 of the elevator rope 18 is wound around the baffle wheel 17.

  A car 19 is suspended from one end of the elevator rope 18. That is, the car 19 is suspended in the hoistway 11 by the elevator rope 18 on one side of the drive sheave 15. A counterweight 20 is suspended from the other end of the elevator rope 18. That is, the counterweight 20 is suspended by the elevator rope 18 on the other side of the drive sheave 15.

  In the hoistway 11, a pair of car guide rails 21 that guide the raising and lowering of the car 19 and a pair of counterweight guide rails 22 that guide the raising and lowering of the counterweight 20 are installed. The car 19 is equipped with an emergency stop device 23 that engages with the car guide rail 21 to stop the car 19 in an emergency.

Note that the type of the elevator apparatus to which the elevator rope of the present invention is applied is not limited to the type shown in FIG. For example, the present invention can be applied to a machine room-less elevator, a 2: 1 roping type elevator device, a multi-car type elevator device, or a double deck elevator.
The elevator rope of the present invention can also be applied to ropes other than the rope for suspending the car 19, such as a compen- sion rope and a governor rope.

Claims (3)

In an elevator rope comprising a rope body and an outer layer covering made of resin coated on the outer periphery of the rope body,
An elevator rope characterized in that inspection surface information corresponding to the position of an inspection carried out along the rope length direction at the time of manufacture is attached to the surface of the outer layer covering body at a predetermined pitch.   The elevator rope according to claim 1, wherein position information in a rope length direction is written together with the inspection result information on a surface of the outer layer covering body. The rope body includes a plurality of strands twisted around its outer periphery,
The elevator rope according to claim 1, wherein a pitch to which the inspection result information is attached is within 2 pitches of a twist pitch of the lasso.

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