JP6010201B1 - Inspection method of elevator rope fixing part - Google Patents

Abstract

An object of the present invention is to obtain a method for inspecting a rope fixing portion of an elevator that can easily check the degree of filling of a filler from the outside of a socket and is simple but highly sound. A method for inspecting a rope fixing portion is applied to an elevator in which a strand of rope inserted into a socket from a rope connection port is fixed to the socket with a filler filled in the socket. First, the socket to which the strand is fixed is held in a posture in which the rope connection port faces downward. Thereafter, a test solution is injected from the upper part of the socket into the socket to which the strand is fixed. By measuring the time from injecting the test liquid into the socket until the test liquid flows out from the rope connection port, the quality of the filling material into the socket is determined. [Selection] Figure 8

Description

  Embodiments of the present invention relate to an inspection method for a rope fixing portion of an elevator in which a rope strand is fixed to a socket of a shackle rod.

  A main rope for suspending an elevator car or counterweight on a hoistway has a plurality of strands twisted around a core rope at a predetermined pitch. The end of the main rope is fixed to the socket of the shackle rod.

  As an example of a method of fixing the end of the main rope to the socket, after inserting a plurality of strands that have been untwisted into the socket, an alloy mainly composed of a low melting point metal is cast into the socket. The so-called Babit type is known.

  According to this method, the molten alloy is filled between the strands and between the strands and the inner surfaces of the sockets, and the strands and the sockets are bonded together by hardening the alloy.

Japanese Patent Laid-Open No. 10-167617

  In the state in which the alloy is cast into the socket, the alloy and the strand are covered with the socket, so it cannot be determined from the outside of the socket whether or not the alloy is closely packed in the socket.

  Therefore, conventionally, the filling degree of the alloy is appropriately maintained by managing the temperature of the socket and the temperature of the alloy cast into the socket. However, after casting the alloy into the socket, no means has been established to check whether the alloy filling degree is defective, and there is room for improvement one step further in improving the soundness of the fixed part of the rope. It is left.

  It is an object of the present invention to obtain a method for inspecting a rope fixing portion of an elevator that can easily check the degree of filling of the filler from the outside of the socket and is simple but highly sound.

According to the embodiment, the rope fixing portion inspection method is such that the rope strand inserted from the rope connection port into the shackle rod socket is fixed to the socket with the filler filled in the socket. Applied.
First, the socket to which the strand is fixed is held in a posture in which the rope connection port faces downward. Thereafter, a test solution is injected from the upper part of the socket into the socket to which the strand is fixed. By measuring the time from the injection of the test solution into the socket until the test solution flows out of the rope connection port, the quality of the filling material into the socket is determined.

It is a side view showing roughly the composition of the elevator concerning an embodiment. It is a side view which shows the state which fixed the edge part of the main rope to the socket of the shackle rod. It is the side view which looked at the fixed location of a socket and a main rope from the direction of arrow F3 of FIG. It is sectional drawing which follows the F4-F4 line | wire of FIG. It is a side view which shows the state which wound the adhesive tape around the socket with which the main rope was fixed. It is a side view which shows the state which wound the absorber around the rope connection port of the socket with which the main rope was fixed. It is a side view which shows the state which inject | pours test oil into the inside of the socket with which the filler was filled using a dropper. It is a flowchart which shows the procedure which test | inspects the filling degree of a filler.

  Hereinafter, embodiments will be described with reference to the drawings.

  FIG. 1 schematically shows a traction type elevator 1. As shown in FIG. 1, the elevator 1 includes a hoistway 2, a pair of first guide rails 3, a pair of second guide rails 4, a car 5, a counterweight 6, a hoisting machine 7, and a control device 8. As a major element.

  The hoistway 2 is provided in a building such as a high-rise building and is erected along the vertical direction. In the example of FIG. 1, only one of the first guide rail 3 and the second guide rail 4 is shown, but the guide rails 3 and 4 are fixed to the right side wall and the left side wall of the hoistway 2. . Therefore, the first guide rail 3 and the second guide rail 4 face each other in the width direction of the hoistway 2 and extend in a straight line along the height direction of the hoistway 2.

  The car 5 is supported by the hoistway 2 through the first guide rail 3 so as to be movable up and down. The counterweight 6 is supported by the hoistway 2 via the second guide rail 4 so as to be movable up and down.

  The hoisting machine 7 and the control device 8 are installed in a machine room 10 at the upper end of the hoistway 2, for example. The hoisting machine 7 has a drive sheave 7a that receives torque from the motor and rotates. A plurality of main ropes 11 are wound around the drive sheave 7 a of the hoisting machine 7. The main rope 11 suspends the car 5 and the counterweight 6 from the hoistway 2 by 1: 1 roping.

  The control device 8 controls the operation of the hoisting machine 7 in the direction of winding up or rewinding the main rope 11. Thereby, the car 5 and the counterweight 6 are moved up and down along the hoistway 2.

  Further, a compensating rope 12 is stretched between the bottom of the car 5 and the lower end of the counterweight 6. The compensating rope 12 hangs from the car 5 and the counterweight 6 toward the bottom of the hoistway 2 and is wound around a compensating sheave 13 disposed at the bottom of the hoistway 2.

  As shown in FIG. 1, one end of the main rope 11 is fixed to the upper beam 14 of the car 5. The other end of the main rope 11 is fixed to the upper end of the counterweight 6. Since the fixed portion of the main rope 11 with respect to the car 5 and the counterweight 6 has a common configuration, in the present embodiment, one end portion of the main rope 11 fixed to the car 5 will be described as a representative. To do.

  The main rope 11 has a plurality of strands 11a twisted at a predetermined pitch around a rope not shown. As shown in FIGS. 2 to 4, one end of the main rope 11 is fixed to the upper beam 14 of the car 5 via a shackle rod 17.

  The shackle rod 17 includes a socket 18 and a rod body 19. The socket 18 is an element made of, for example, a carbon steel pipe for machine structure, and includes a first cylindrical portion 18a and a second cylindrical portion 18b. The 1st cylinder part 18a has the rope connection port 21 into which the one end part of the main rope 11 is inserted in the end along the axial direction. Furthermore, the 1st cylinder part 18a is formed in the cone shape from which a diameter increases sequentially as it distances from the rope connection port 21. As shown in FIG.

  The 2nd cylinder part 18b is connected to the opening end on the opposite side to the rope connection port 19 of the 1st cylinder part 18a coaxially. The 2nd cylinder part 18b has the straight tubular surrounding wall 22, and the rod insertion port 23 opened toward the opposite side to the 1st cylinder part 18a.

  A pair of slits 24a and 24b are formed in the peripheral wall 22 of the second cylindrical portion 18b. The slits 24a and 24b extend in a straight line in the axial direction of the second cylindrical portion 18b, and face each other in the radial direction of the second cylindrical portion 18b. Furthermore, one ends of the slits 24 a and 24 b are opened to the rod insertion port 23.

  A pair of connecting holes 25a and 25b are formed in the peripheral wall 22 of the second cylindrical portion 18b. The connection holes 25a and 25b face each other in the radial direction of the second cylindrical portion 18b between the slits 24a and 24b. The slits 24 a and 24 b and the connection holes 25 a and 25 b are an example of openings formed in the peripheral wall 22.

  The rod body 19 is composed of a straight round bar. A flat head 19 a is formed at one end of the rod body 19. The head 19a is inserted into the slits 24a and 24b from the rod insertion port 23, and is positioned between the coupling holes 25a and 25b on the inner side of the second cylindrical portion 18b.

  The connecting pin 26 is inserted across the connecting holes 25a and 25b of the second cylindrical portion 18b. The connecting pin 26 passes through the head 19 a of the rod body 19 and is held in the socket 18 by split pins 27 a and 27 b inserted at both ends of the connecting pin 26. Therefore, the rod body 19 is connected to the socket 18 via the connecting pin 26.

  The other end of the rod body 19 passes through a hitch plate 28 fixed to the upper beam 14 and protrudes below the hitch plate 28. A spring receiver 29 is held on the other end of the rod body 19 via a pair of nuts 30. A compression coil spring 31 is interposed between the spring receiver 29 and the hitch plate 28. The compression coil spring 31 elastically biases the shackle rod 17 toward the lower side of the hitch plate 28. Therefore, the shackle rod 17 is supported by the upper beam 14 of the car 5 so as to be elastically displaceable in the vertical direction.

  As shown in FIGS. 2 and 3, a wire 33 is wound around one end of the main rope 11 in a coil shape so that the twist of the strand 11 a does not return. The leading end portion of the main rope 11 protruding from the wire 33 is inserted into the first cylindrical portion 18 a of the socket 18 through the rope connection port 21. The strand 11a is untwisted at the distal end portion of the main rope 11 inserted into the first tube portion 18a. The plurality of strands 11a that have been untwisted are radially expanded inside the first cylindrical portion 18a, and each strand 11a is folded back so as to draw a loop.

  The strands 11a that are radially expanded inside the first cylindrical portion 18a are fixed to the socket 18 by a so-called Bavit method in which a molten filler 35 is cast inside the first cylindrical portion 18a. As the filler 35, for example, an alloy mainly composed of a low melting point metal such as white metal is used. In filling the first cylindrical portion 18a with the filler 35, the socket 18 and the filler 35 are heated to a predetermined temperature and managed so that the fluidity of the molten filler 35 is appropriate. It is desirable.

  As shown in FIG. 4, the filler 35 filled in the first cylindrical portion 18a is adjacent between the inner surface of the first cylindrical portion 18a and the strand 11a and inside the first cylindrical portion 18a. It flows in between the matching strands 11a and hardens over time. By hardening the filler 35, the strand 11 a and the socket 18 are integrally coupled, and one end of the main rope 11 is fixed to the shackle rod 17.

  Next, a procedure for inspecting the filling degree of the filler 35 will be described with reference to FIGS.

  The operation of casting the filler 35 in the socket 18 and the operation of inspecting the degree of filling of the filler 35 are performed at the work site where the elevator 1 is installed. The inspection is performed when the filler 35 filled in the socket 18 is hardened. In this embodiment, the inspection is performed before the rod body 19 is connected to the socket 18.

  FIG. 8 is a flowchart showing a series of processes from the insertion of the strand 11a at the tip of the main rope 11 into the socket 18 until the completion of the inspection of the filling degree of the filler 35.

  In the first step S <b> 1, the tip end portion of the main rope 11 having a plurality of strands 11 a whose twist is released is inserted into the first tube portion 18 a of the socket 18 from the rope connection port 21. Accordingly, the main rope 11 and the wire 33 are fitted inside the rope connection port 21. Furthermore, the plurality of strands 11a located at the tip of the main rope 11 are radially developed inside the first tube portion 18a.

  Thereafter, the process proceeds to step S2 in which the filler 35 is cast into the first cylindrical portion 18a of the socket 18. In step S2, the socket 18 and the filler 35 before melting are heated, and the temperature of the socket 18 and the filler 35 is controlled so that the fluidity of the molten filler 35 is maintained appropriately.

  When the filler 35 filled in the socket 18 is cured, the process proceeds to step S3. In step S3, as shown in FIG. 5, the socket 18 is held in such a posture that the rope connection port 21 of the socket 18 into which the main rope 11 is inserted faces downward. Further, the adhesive tape 36 is wound around the outer peripheral surface of the peripheral wall 22 of the second cylindrical portion 18b in which the slits 24a, 24b and the connecting holes 25a, 25b are formed, and the slits 24a, 24b and the connecting holes 25a, 25b are connected with the adhesive tape 36. Block liquid tightly.

  Thereafter, the process proceeds to step S4 where the absorber 37 is wound around the rope connection port 21 of the socket 18 from which the main rope 11 is drawn. As the absorber 37, it is desirable to use a transparent or milky white glass fiber rope, for example. As shown in FIG. 6, the absorbent body 37 surrounds the gap formed between the rope connection port 21 and the wire 33 from the outside of the socket 18.

  Subsequently, the process proceeds to step S5 where the inspection oil 38 is injected into the socket 18. The inspection oil 38 is an example of an inspection liquid, and mineral oil is used in this embodiment. The viscosity of the inspection oil 38 is suitably 5 to 46, preferably 7 to 15. Further, by adding a dye or pigment to the base mineral oil, the inspection oil 38 itself is colored, for example, in red with excellent visibility.

  As shown in FIG. 7, the inspection oil 38 is injected from the rod insertion port 23 of the socket 18 using, for example, a dropper 39. The injection amount of the inspection oil 38 is approximately 10 ml to 20 ml, although it depends on the size or shape of the socket 18.

  The inspection oil 38 injected into the socket 18 permeates between the inner surface of the first cylindrical portion 18a and the filler 35 and between the strand 11a and the filler 35, and finally from the rope connection port 21 to the socket. It flows out of 18.

  In this embodiment, the absorber 37 using a glass fiber rope is wound around the rope connection port 21. For this reason, when the inspection oil 38 flows out from the rope connection port 21, the outflowing inspection oil 38 penetrates into the absorber 37. Thereby, it is possible to easily recognize from the outside of the socket 18 that the absorber 37 has turned red and the inspection oil 38 has flowed out of the rope connection port 21.

  When the inspection oil 38 is injected, the process proceeds to step S6. In step S6, the time from the start of injection of the inspection oil 38 until the absorber 37 turns red is measured using, for example, a stopwatch.

  Thereafter, the process proceeds to step S7 for determining whether or not the time measured by the stopwatch is equal to or longer than a reference time. In this embodiment, the reference time is set to 180 seconds, for example. Therefore, in step S7, the time actually measured by the stopwatch is compared with the reference time, and when the measurement time is 180 seconds or more, it is determined that the filling degree of the filler 35 into the socket 18 is good.

  The good filling degree of the filler 35 means that the filler 35 is formed between the inner surface of the first cylindrical portion 18a of the socket 18 and the strand 11a and between the adjacent strands 11a in the first cylindrical portion 18a. It indicates a state in which the inspection oil 38 is likely to stay inside the socket 18 with a high density in between. When the filling degree of the filler 35 is good, the process proceeds to step S8, and the inspection is finished.

  On the other hand, when the measurement time does not reach 180 seconds, it is determined in step S7 that the filling degree of the filling material 35 into the socket 18 is defective. That the filling degree of the filler 35 is poor means that, for example, a cavity is formed inside the solidified filler 35, or between the inner surface of the first cylindrical portion 18a and the strand 11a and between adjacent strands 11a. It indicates that there is a gap between them.

  If such a cavity or gap exists inside the socket 18, the fixing strength of the strand 11 a with respect to the socket 18 is insufficient, and the main rope 11 comes out of the rope connection port 21 of the socket 18.

  In addition, the cavity and the gap remain in the first cylindrical portion 18a as a flow path that prevents the inspection oil 38 from staying. As a result, the inspection oil 38 comes out of the first cylindrical portion 18a from the rope connection port 21 at an early stage.

  When the filling degree of the filler 35 is poor, the process proceeds to step S9 and the operation of refilling the socket 35 with the filler 35 is performed. Specifically, first, the adhesive tape 36 and the absorber 37 are removed from the socket 18 in step S10.

  Thereafter, the process proceeds to step S11 in which the socket 18 is heated with, for example, a gas burner. By heating the socket 18, the filler 35 in a solidified state is dissolved. Subsequently, the process proceeds to step S <b> 12 in which the melted filler 35 is removed from the socket 18.

  When the filler 35 is removed from the socket 18, the process returns to step S2, and an operation of casting a new filler 35 into the first cylindrical portion 18a of the socket 18 is executed.

  When the inspection is completed, it is desirable to remove the adhesive tape 36 and the absorber 37 from the socket 18 and wipe off the inspection oil 38 attached to the main rope 11 and the socket 18.

  According to such an embodiment, the inspection oil 38 is injected into the socket 18 in which the filler 35 is cast, and the time until the inspection oil 38 flows out from the rope connection port 21 of the socket 18 is measured. It is determined whether or not the filling degree of the filler 35 into the socket 18 is defective.

  Accordingly, even after the filler 35 is cast into the socket 18, it can be easily known from the outside of the socket 18 whether the filling degree of the filler 35 is defective, and the main rope 11 is fixed to the shackle rod 17. It is convenient to increase the soundness of the part.

  Moreover, the inspection tools 38, adhesive tape 36, absorbent body 37 such as a glass fiber rope, and stopwatch are only required as inspection tools, and no special equipment or large-scale equipment is required. For this reason, even at the work site where the elevator 1 is installed, the filling degree of the filler 35 can be easily confirmed within a short time, and the workability is excellent.

  Furthermore, by using oil such as mineral oil as the inspection liquid, the metal main rope 11 and the socket 18 are not damaged, and the main rope 11 and the socket 18 are not rusted. In addition, since oil has a higher viscosity than water and is difficult to evaporate, the filling degree of the filler 35 can be inspected without being sensitive to the influence of the outside air temperature.

  At the same time, when the filler 35 is filled in the socket 18, the operation of controlling the temperature of the filler 35 and the socket 18 so that the viscosity of the melted filler 35 is appropriate is used in combination. The soundness of the filled socket 18 can be further enhanced.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  For example, in the said embodiment, although mineral oil was used as a test | inspection liquid, you may use vegetable oil instead of mineral oil. Furthermore, a liquid other than oil can be used as the inspection liquid as long as it does not damage the main rope or the socket. In other words, water is unsuitable as a test solution because it causes rust on the main rope and socket, is easily evaporated, and is affected by outside air temperature.

  In the above-described embodiment, the reference time for pass / fail determination is 180 seconds, but the reference time can be appropriately changed according to, for example, the outside air temperature, the viscosity of the inspection oil, or the shape / size of the socket.

  Furthermore, the absorbent body is not limited to the glass fiber rope, and tissue paper may be used instead of the glass fiber rope.

  At the same time, the absorber may be omitted if the inspection oil can easily be seen from the rope connection port.

  In addition, the shackle rod to which the main rope is fixed may have a configuration in which the socket and the rod body are integrated, and the configuration of the shackle rod is not particularly limited.

  DESCRIPTION OF SYMBOLS 11 ... Rope (main rope), 11a ... Strand, 17 ... Shackle rod, 18 ... Socket, 21 ... Rope connection port, 35 ... Filler, 38 ... Inspection liquid (inspection oil).

Claims (7)

A rope strand is inserted into the socket of the shackle rod from the rope connection port of the socket, and the rope fixing portion of the elevator fixed to the socket with the filler filled in the socket is inspected. A method,
Holding the socket to which the strand is fixed in a posture in which the rope connection port faces downward;
Inject a test solution from the top of the socket into the socket to which the strand is fixed,
Rope fixing that determines the quality of the filling of the socket with respect to the socket by measuring the time from when the test solution is injected into the socket until the test solution flows out of the rope connection port Part inspection method. The socket has a first tube portion having the rope connection port opened at one end, and a peripheral wall extending from the first tube portion toward the opposite side of the rope connection port. And a second tube portion having an opening formed therein,
The elevator rope fixing part according to claim 1, wherein the opening is liquid-tightly closed by winding an adhesive tape around the peripheral wall of the second cylindrical part before supplying the inspection liquid to the socket. Inspection method.   The inspection method of the rope fixing | fixed part of the elevator of Claim 1 or Claim 2 using the colored oil as said test | inspection liquid.   An absorber that soaks the test solution into the rope connection port of the socket is attached, and a time from when the test solution is poured into the socket until the test solution soaks into the absorber is measured. The inspection method of the rope fixing | fixed part of the elevator as described in any one of thru | or 3.   The said absorber is a glass fiber rope, The inspection method of the rope fixing | fixed part of the elevator of Claim 4.   The method for inspecting an elevator rope fixing portion according to claim 4 or 5, wherein the absorber discolors when the inspection liquid soaks into the absorber.   2. The filler filled in the socket is removed when it is determined that the filling degree of the filler is poor, and then a new filler is refilled in the socket. Inspection method of the rope fixing part of the elevator as described in 1.

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