JP5615778B2 - Elevator rope tension adjusting device and rope tension adjusting system - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an elevator rope tension adjusting device and a rope tension adjusting system, and more particularly, rope tensions of a plurality of main ropes attached to a thimble rod included in an elevator rope end device and suspending a weight as a passenger car. The present invention relates to a rope tension adjusting device for an elevator that adjusts a rope tension, and a rope tension adjusting system including the rope tension device.

  Generally, a steel wire rope is used as a main rope for suspending an elevator car and a counterweight. In high-speed and high-lift elevators where the weight of the car is heavy and the lift is long, for example, 8 to 10 main ropes are often used. On the other hand, in recent years, elevators have also increased in speed and height due to further increase in the height of buildings. Such tension of the main rope of the elevator is an important maintenance item in terms of ride quality, and it is desired to improve the accuracy and efficiency of inspection and adjustment.

  When such a large number of main ropes are wound up by the main motor, if the tension of the main rope is unbalanced, the rope strands may be worn, broken or broken. When such an event occurs, not only will the rope life be adversely affected, but it will also cause premature wear of the sheave groove of the hoist. Further, once uneven wear occurs in the sheave, a difference occurs in the length of the main rope that is sent out when the up-and-down stroke is long, and the unbalance of the rope tension is further increased. These become prominent in proportion to the stroke length of the lifting stroke. Therefore, regular adjustment of the rope tension to correct the balance of the tension balance due to changes over time is particularly necessary in a high-lift elevator.

  Therefore, in order to cope with periodic adjustment of the rope tension, easy adjustment is required. As techniques corresponding to such ease of adjustment, for example, the inventions disclosed in Patent Documents 1 and 2 are known. Among these, in Patent Document 1, a hydraulic jack is temporarily installed in each of the holding devices of the plurality of main ropes, and the hydraulic jack is driven with the same pressure to pull in the holding devices, so that the tension of the main rope becomes uniform. An elevator main rope maintenance apparatus adapted to be adjusted as described above is disclosed.

  Further, in Patent Document 2, it is not necessary to adjust the height of the spring member with respect to the thimble rod provided inside the machine beam, and the main rope tension of the elevator intended to perform the adjustment work easily and quickly. An adjustment method is disclosed.

Japanese Patent Laid-Open No. 4-164791 JP-A-6-345356

  The technique disclosed in Patent Document 1 is intended to be able to easily and easily adjust the tension of the main ropes provided in parallel, and the technique disclosed in Patent Document 2 is a thimble provided inside the machine beam. There is no need to adjust the spring member with respect to the rod, and the adjustment work can be saved.

  In any of the techniques described in the patent documents, the ease of adjustment is claimed, but the device used when adjusting the tension of the rope does not include the rope detent mechanism and the rope removal prevention mechanism. Therefore, when tension is applied to the rope, the rope may rotate in a direction in which the rope is untwisted, and the rope may fall off. In any case, it becomes an obstacle to adjustment work.

  The present invention has been made in view of the actual situation of the prior art as described above. The purpose of the present invention is to realize the rotation prevention of the rope to which the tension is applied at the time of adjusting the tension of the main rope and the prevention of the rope from falling off. The purpose is to improve the safety of the rope tension adjustment work and to extend the life of the main rope.

  In order to achieve the object, the first means is an elevator rope tension adjusting device attached to an elevator rope end device, the thimble rod to which the end of the main rope of the elevator is attached, and the thimble rod A nut that is screwed onto the flat plate, a flat washer that is mounted around the thimble rod and that contacts the bottom surface of the nut, and a spring that is mounted around the thimble rod and contacts the bottom surface of the flat washer And a fixture that is mounted around the thimble rod and that abuts the bottom of the spring on its top surface and abuts the fixing member of the thimble rod on its bottom surface, and a penetration formed near the top of the thimble rod A split pin attached to the hole to prevent the thimble rod from falling off; and the split pin is removed. The thimble rod is installed by being screwed into the thimble rod, a long hole is formed at a position facing the through hole of the thimble rod, and a male screw portion is formed on the outer periphery of the thimble rod, and the thimble A rope retaining means including a retaining pin inserted into the elongated hole at the lower part of the rod lifting pipe and the through hole of the thimble rod to prevent the thimble rod from falling off, and a lateral side abutting against the flat washer at the bottom A hydraulic actuator fixing portion having an annular collar that enables insertion of a finger from the center, and an insertion space that allows the thimble rod to be attached to the lower portion of the lifting pipe at the center, and the collar of the hydraulic actuator fixing portion A hydraulic actuator that is placed on top and bottom and expands and contracts in the vertical direction. A rope stop including a thimble rod lifting pipe upper part that abuts and engages with the male threaded part of the lower part of the thimble rod lifting pipe, and a transmitter that transmits a rotational force applied to the thimble rod to the hydraulic actuator fixing part. Means.

  The second means includes a rope tension adjusting device according to the first means attached to each of a plurality of main ropes for suspending the carriage and the counterweight, and each of the hydraulic actuators of the rope tension adjusting device. A hydraulic pump that supplies pressure oil via a pressure oil supply path, and a pipe that collects the pressure oil supply paths, and the hydraulic pump, between the pipe and the hydraulic pump. It features a rope tension adjustment system that includes a stop valve that controls the flow of pressure oil.

  According to the present invention, it is possible to prevent the main rope from falling off and to prevent the main rope from being turned around. As a result, the safety of the rope tension adjustment work can be improved as compared with the conventional case. In addition, it is possible to eliminate factors that adversely affect the life of the rope, such as wear, breakage, strand breakage, etc. of the main rope strands, and the life of the rope can be extended compared to the prior art.

It is a figure which shows the structure of a general 2: 1 roping elevator. It is an enlarged view of the rope end part apparatus shown in FIG. It is a front view of the thimble rod raising pipe lower part in the embodiment of the present invention. It is a front view of the thimble rod raising pipe upper part in the embodiment of the present invention. It is a front view of the retaining pin in the embodiment of the present invention. It is a front view of the detent pin in the embodiment of the present invention. It is a figure which shows the hydraulic actuator in embodiment of this invention. It is a figure which shows the hydraulic actuator fixing | fixed part in embodiment of this invention. It is a flowchart which shows the operation | movement procedure which installs the rope tension adjustment apparatus which concerns on this embodiment with respect to one main rope. It is a figure which shows the work procedure of procedure S1 concretely. It is a figure which shows the work procedure of procedure S2, S3 concretely. It is a figure which shows the work procedure of procedure S4 concretely. It is a figure which shows the work procedure of procedure S5 concretely. It is a figure which shows the work procedure of procedure S6 concretely. It is explanatory drawing which shows the tension adjustment principle in the rope tension adjustment apparatus which concerns on embodiment of this invention. It is a figure showing a system configuration of a system concerning an embodiment of the present invention which adjusts rope tension of a plurality of main ropes uniformly.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a structure of a general 2: 1 roping elevator. As shown in FIG. 1, for example, a machine room 2 is provided in an upper part of a hoistway 1 formed in a building, and a hoisting machine 3 is installed in the machine room 2. The hoisting machine 3 has an electric motor and a sheave driven by the electric motor. The electric motor is disposed on the floor surface of the machine room 2. One end of the main rope 4 is wound around the sheave, and a car 5 is suspended on one side of the main rope 4 via a thimble rod 6 and a spring 7 included in a rope end device described later.

  On the other hand, at the upper part of the hoistway 1, a deflecting sheave 8 is provided on the beam of the machine room 2, and a portion up to the other end side of the main rope 4 is wound around the deflecting sheave 8. The main rope 4 wound around the deflecting sheave 8 hangs down the hoistway 1, and a counterweight 9 is suspended at the lower end. In the elevator configured as described above, when the electric motor of the hoisting machine 3 is driven, the sheave fixed to the electric motor rotates. The main rope 4 is moved by the rotation of the sheave, and the car 5 and the balance weight 9 are raised and lowered in the hoistway 1 in opposite directions.

  FIG. 2 is an enlarged view of the rope end device shown in FIG. As shown in FIG. 2, the rope end device includes a thimble rod 6 in which the end of the main rope 4 is connected to the lower end, a lock nut 11 attached to the thimble rod 6, a flat washer 10, a spring 7, and a fixture 62. And a split pin 12. The thimble rod 6 is in contact with the fixing member 61 via the fixture 62 on the lower side, and the flat washer 10 is provided on the upper side of the fixture 62. Between the fixture 62 and the flat washer 10, a thread 7 is provided for applying an elastic force in a direction to separate them.

  A lock nut 11 including two nuts 11 a and 11 b is provided on the upper portion of the flat washer 10. The lock nut 11 is screwed into a male screw portion formed on the upper portion of the thimble rod 6 and presses the longitudinal direction of the spring 7 through a flat washer 10. As a result, the spring length of the spring 7 is regulated, and an elastic force corresponding to the regulated spring length is generated. In the figure of the male thread portion of the thimble rod 6, a through hole 6a is provided at the uppermost portion (see FIG. 3), and a split pin 12 for preventing the thimble rod 6 from falling off is attached to the through hole 6a.

  The thimble rod 6 is fixed to a fixing member 61, and the main rope 4 is attached to the lower end of the thimble rod 6 protruding downward from the fixing member 61. The rope tension adjusting device is attached to the upper side of the flat washer 10 of the thimble rod 6.

  14 and 15, the rope tension adjusting device includes a thimble rod 6, a fixture 62, a spring 7, a flat washer 10, a nut 11 a, a hydraulic actuator 17 attached to the upper side of the thimble rod 6, and a thimble rod. It is mainly composed of a pull-up pipe upper portion 14, a stop pin 16, and a thimble rod pull-up pipe lower portion 13.

  A thimble rod lifting pipe is attached to the male screw portion on the upper part of the thimble rod 6. The thimble rod lifting pipe is composed of two parts, a thimble rod lifting pipe lower part 13 and a thimble rod lifting pipe upper part 14. FIG. 3 is a front view of the thimble rod lifting pipe lower portion 13 shown in FIGS. 14 and 15, and FIG. 4 is a front view of the thimble rod lifting pipe upper portion 14.

  The thimble rod lower pipe lower portion 13 is screwed into and mounted on the male thread portion of the thimble rod 6 from which the split pin 12 shown in FIG. 2 is removed. At the position of the thimble rod pulling pipe lower portion 13 facing the through hole 6a of the thimble rod 6, a retaining hole 13a is formed, and a male screw portion 13c is formed on the outer periphery of the upper portion. Further, the male screw portion 13c is formed with a rotation pin hole 13b as a through hole.

  The thimble rod pulling pipe upper portion 14 has a screw portion that is screwed into the male screw portion 13 c of the thimble rod pulling pipe lower portion 13 on the inner surface, and the bottom surface abuts on the upper surface of the hydraulic actuator 17.

  FIG. 5 is a front view of the retaining pin 15. The retaining pin 15 is inserted into the retaining hole 13a of the thimble rod lifting pipe lower part 13 and the through hole 6a of the thimble rod 6 to prevent the thimble rod 6 from falling off the thimble rod lifting pipe lower part 13. belongs to.

  FIG. 6 is a front view of the detent pin 16. The detent pin 16 functions as a transmission tool that transmits the rotational force applied to the thimble rod 6 to the hydraulic actuator fixing portion 18 (see FIG. 8).

  FIG. 7 is a diagram showing a hydraulic actuator, where FIG. 7A is a front view, FIG. 7B is a side view, and FIG. 7C is a diagram showing an example of an internal structure. The hydraulic actuator 17 is mounted on the outer periphery of a cylindrical portion in which the long hole 13a of the thimble rod pulling pipe lower portion 13 is formed. For this reason, a cylindrical insertion space 17c is provided on the center side, and the insertion space 17c is inserted into the thimble rod pulling pipe lower portion 13 and placed on the collar 18a of the hydraulic actuator fixing portion 18. In this state, the piston rod 17d of the hydraulic actuator 17 expands and contracts in the vertical direction.

  The hydraulic actuator 17 is provided with an annular cylinder 17e smaller than the radial width of the annular portion at the annular portion on the outer periphery of the insertion space 17c. An annular piston 17 f is inserted into the cylinder 17 e, and a piston rod 17 d having a drive surface 17 a at the upper part is provided from the piston 17 f so as to extend to the upper part of the hydraulic actuator 17. A hydraulic valve 17b is connected to the cylinder 17e via a hydraulic path 17g, and the supply of pressure oil from a hydraulic source described later is controlled.

  The main body portion of the hydraulic actuator 17 is integrally molded, for example, and the strength is increased to prevent leakage of pressure oil from the main body portion. In addition, by reducing the height dimension, it is possible to cope with a small mounting space. Further, the diameter of the insertion space 17c can be set in consideration of the inclination of the main rope 4 and the installation space. This corresponds to the inclination of the main rope 4 that is inevitably generated when the main rope 4 is wound up, and even if a lateral force is applied by the tilting and contacting of the lower portion 13 of the simple rod pulling pipe, it is integrated. Correspondence is possible by molding or setting the diameter of the insertion space 17c.

  Further, in the present embodiment, the seal member that seals between the inner surface of the cylinder 17e and the outer surface of the piston 17f in FIG. 7 is the slipper seal 17h1 to ensure the sealing performance. In the present embodiment, the inner surface side is an O-ring 17h2.

  8A and 8B are views showing the hydraulic actuator fixing portion 18. FIG. 8A is a front view, FIG. 8B is a side view, and FIG. 8C is a cross-sectional view taken along the line II of FIG. The hydraulic actuator fixing portion 18 includes an annular collar 18a and a plate-shaped detent pin guide 18b attached to face the outer peripheral portion of the collar 18a. The collars 18a are positioned below the hydraulic actuator fixing portion 18, and a pair of anti-rotation pin guides 18b are attached to face each other so as to extend upward from the collar 18a.

  As shown in FIGS. 14 and 15, the bottom of the collar 18a is always in contact with the top surface of the flat washer 10, and a round hole 18d is formed on the side surface of the collar 18a to allow a finger to be inserted from the side. Has been. Further, the detent pin guide 18b is formed with a detent pin guide long hole 18c facing the detent pin hole 13b. The aforementioned detent pin 16 is inserted into the detent pin guide elongated hole 18c of the detent pin guide 18b and the detent pin hole 13b of the thimble rod lifting pipe lower portion 13.

FIG. 9 is a flowchart showing an operation procedure for installing the rope tension adjusting device according to the present embodiment on one main rope 4.
In this figure, in this work procedure, the processes from steps S1 to S6 are sequentially executed. In this work procedure, first, as shown in FIG. 10, the split pin 12 (see FIG. 2) attached to the thimble rod 6 is removed, and then the lock by the lock nut 11 is released, as shown in FIG. 10. That is, the upper nut 11b of the two nuts 11a and 11b is removed, leaving only the lower nut 11a. 10A is a front view showing the main part of the thimble rod 6, and FIG. 10B is a side view thereof.

  Next, as step S2, as shown in FIG. 11, the thimble rod lifting pipe lower portion 13 is attached to the thimble rod 6. The thimble rod lifting pipe lower portion 13 has a threaded portion formed therein so that it can be screwed into the thimble rod 6, and the through hole 6a for the split pin 12 removed in step S1 is formed in the thimble rod lifting pipe lower portion 13. It is fully screwed into the thimble rod 6 so as to face the provided retaining pin long hole 13a.

  Further, as step S3, the retaining pin 15 is inserted into the through hole 6a for the split pin 12 from the retaining pin long hole 13a provided in the lower portion 13 of the thimble rod lifting pipe as shown in FIG. ,Installing. The length of the retaining pin 15 is set to a dimension such that both ends of the retaining pin 15 remain in the retaining pin long hole 13a when the retaining pin 15 is inserted into the through hole 6a and mounted at a predetermined position. . Thereby, even if the thimble rod 6 falls, the retaining pin 15 hits the lower end of the retaining pin long hole 13a and functions as a stopper. As a result, the main rope 4 is prevented from falling off. That is, even if the thimble rod 6 is about to fall from the thimble rod pulling pipe lower portion 13 for some reason, the retaining pin 15 hits the lower portion of the retaining pin long hole 13a, thereby preventing the thimble rod 6 from falling. Can do. 11A is a front view showing a state where the thimble rod pulling pipe lower portion 13 is attached to the thimble rod 6, and FIG. 11B is a side view thereof.

  As step S4, as shown in FIG. 12, the collar 18a of the hydraulic actuator fixing portion 18 is inserted into the outer peripheral portion of the thimble rod lifting pipe lower portion 13, and the collar 18a is disposed on the flat washer 10 so as to surround the nut 11a. Further, the hydraulic actuator 17 is disposed on the collar 18a. At this time, the hydraulic actuator 17 is disposed so as to pass through the insertion space 17 c of the hydraulic actuator 17 into the thimble rod lifting pipe lower portion 13 and surround the thimble rod lifting pipe lower portion 13.

  The hydraulic actuator 17 drives a hydraulic pump 170 as a drive source shown in FIG. 16 so that pressure oil flows into or out of the internal cylinder 17e via the hydraulic valve 17b shown in FIG. Then, the piston rod 17d expands and contracts. Further, as described above, the detent pin guide 18b is provided with the detent pin guide long hole 18c so that the thimble rod 6 is pulled up when the rope tension is adjusted and the spring 7 is contracted. The stop pin 16 can be guided.

  12A is a front view showing a state when the hydraulic actuator fixing portion 18 is attached to the outer peripheral portion of the thimble rod pulling pipe lower portion 13, and FIG. 12B is a side view thereof.

  In addition, as step S5, as shown in FIG. 13, the upper part 14 of the thimble rod lifting pipe is screwed onto the male thread part 13c of the lower part 13 of the thimble rod lifting pipe. The thimble rod pulling pipe upper portion 14 is provided with an adjustment start line 14a and an adjustment end line 14b used for adjusting the rope tension on the surface as shown in FIG.

  FIG. 13A is a front view showing a state when the thimble rod lifting pipe upper portion 14 is attached to the thimble rod lifting pipe lower portion 13, and FIG. 13B is a side view thereof.

  Finally, as step S6, as shown in FIG. 14, the non-rotating pin 16 is inserted into the non-rotating pin guide long hole 18c of the hydraulic actuator fixing portion 18 and the non-rotating pin hole 13a of the thimble rod lifting pipe lower portion 13. Insert them and connect them together with a locking pin 16. By assembling the parts in this manner, the weight of the hydraulic actuator 17 is added to the collar 18a of the hydraulic actuator fixing part 18, and as a result, the resistance friction between the collar 18a and the flat washer 10 against the rotational force applied to the collar 18a. Power will act. Therefore, a force to turn the thimble rod 6 is transmitted to the rotation stop pin 16, and when the rotation stop pin 16 attempts to rotate together with the thimble rod 6, the movement of the rotation stop pin 16 is caused by the collar 18 a of the hydraulic actuator fixing portion 18. Is prevented by. As a result, the rotation of the thimble rod 6 can be realized. That is, the main rope 4 connected to the thimble rod 6 and adjusted in tension can be prevented from turning.

  14A is a front view showing a state in which the detent pin 16 is attached to the hydraulic actuator fixing portion 18, and FIG. 14B is a side view thereof.

  The rope tension adjusting device according to this embodiment attached in this way can adjust the rope tension by pulling up the thimble rod 6 and contracting the spring 7 according to the operating principle shown in FIG.

  That is, as shown in FIG. 15A, in a state where the rope tension adjusting device according to this embodiment is attached to the thimble rod 6, a hydraulic pump 170 shown in FIG. The pressure oil is allowed to flow inside. As a result, the piston rod 17d of the hydraulic actuator 17 extends, and the thimble rod pull-up pipe lower portion 13 and the thimble rod pull-up pipe upper portion 14 tend to be pulled up as the drive surface 17a of the piston rod 17d rises. At this time, the thimble rod 6 connected to the thimble rod pull-up pipe lower portion 13 and the thimble rod pull-up pipe upper portion 14 also tends to be lifted. As the thimble rod 6 is pulled up in this way, the flat washer 10 is relatively pushed down, and the spring 7 is also contracted following the depression of the flat washer 10, as shown in FIG. Can be bent.

  Here, since the extension stroke of the hydraulic actuator 17 is limited, the top of the hydraulic actuator 17 is located within the range of the adjustment start line 14a and the adjustment end line 14b provided in the upper part 14 of the thimble rod lifting pipe. It is necessary to perform adjustment work while confirming the above.

  Further, as shown in FIG. 15B, when the nut 11a is lifted from the flat washer 10, as shown in FIG. 8, a finger is inserted into the round hole 18d formed in the collar 18a, and the nut 11a is rotated. Then, it moves below the thimble rod 6 until it contacts the flat washer 10. The moving direction and moving amount of the nut 11a are defined according to the rotation direction of the nut 11a with respect to the male screw and the pitch of the male screw.

  When the pressure applied to the cylinder 17e of the hydraulic actuator 17 is removed in a state where the nut 11a has moved until it abuts against the flat washer 10, the piston rod 17a contracts, and the spring 7 is moved into FIG. ) Return to the same extended form as in the state shown in FIG. In such a state, the length dimension of the thimble rod 6 protruding upward from the flat washer 10 is longer than that in the case of FIG. 8A, and the tension of the main rope 4 connected to the thimble rod 6, ie, Rope tension is higher than before.

  FIG. 15A shows an initial state before pressure oil is allowed to flow into the hydraulic actuator 17, and FIG. 15B shows a state where pressure oil is allowed to flow into the hydraulic actuator 17 and the spring 7 is compressed. FIG.

  FIG. 16 is a diagram showing a system configuration of a system that uniformly adjusts the rope tension of the plurality of main ropes 4 using such an operation principle. In the system shown in FIG. 16, the rope tension adjusting device according to the present embodiment including the hydraulic actuator 17 is installed at each end of the plurality of main ropes 4, and the end of each main rope 4 is If pressure oil is supplied to the hydraulic actuator 17 of the rope tension adjusting device, the rope tension of the corresponding plurality of main ropes 4 can be adjusted uniformly.

  At that time, the stop valve 19 is provided between the hydraulic pressure adjusting pipe 21 and the hydraulic pump 170 that collect the pressure oil supply paths 20 of the hydraulic actuators 17. Try to close. Accordingly, the pressure oil can be confined between the stop valve 19 and each cylinder 17e of each hydraulic actuator 17. When the pressure oil is confined in this way, the pressure in each cylinder 17e attached to each main rope 4 becomes equal, and the distribution of the pressure oil to each hydraulic actuator 17 can be made uniform at the same time.

  The stop valve 19 is closed when the hydraulic actuators 17 are operated for all the thimble rods 6 and all the main ropes 4 are pulled up as shown in FIG. In this state, the stop valve 19 is closed and all the nuts 11a are rotated as described above to return to the state shown in FIG. Since three to eight main ropes 4 are generally provided, the tension of each main rope 4 can be easily adjusted by adjusting in this way.

  Thus, according to the present embodiment, it is possible to prevent the main rope 4 from falling off by attaching the retaining pin 15, and the safety of the rope tension adjustment work can be improved. Further, the rotation of the main rope 4 to which tension is applied can be realized by mounting the rotation stop pin 16. This makes it possible to eliminate factors that adversely affect the life of the main rope 4 such as wear, breakage, strand breakage, etc. of the strands of the main rope 4 and extend the life of the main rope 4.

  The rope tension adjusting device according to the present embodiment can be permanently installed. In such a permanent installation, it is not necessary to attach and remove the rope tension adjustment device every time the rope tension is adjusted, and it is possible to reduce the work time of the rope tension adjustment work and improve the work efficiency. Can do.

  Further, if the rope tension adjusting device according to the present embodiment is installed for each main rope 4, the rotation and dropout of the rope are prevented for each main rope 4 without being affected by the other main ropes 4. be able to.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention, and all technical matters included in the technical idea described in the claims are included. The subject of the present invention. The above embodiment shows a preferable example, but those skilled in the art can realize various alternatives, modifications, variations, and improvements from the contents disclosed in this specification, These are included in the technical scope described in the appended claims.

4 Main rope 6 Thimble rod 6a Through hole 7 Spring 10 Flat washer 11 Lock nut 11a, 11b Nut 12 Split pin 13 Lower part of thimble rod lifting pipe 13a Long hole for retaining pin 13b Non-retaining pin hole 13c Male thread 14 Lifting thimble rod Upper part of tube 15 Retaining pin 16 Non-rotating pin (Transmission tool)
DESCRIPTION OF SYMBOLS 17 Hydraulic actuator 18 Hydraulic actuator fixing | fixed part 18a Collar 18b Non-rotating pin guide 18c Non-rotating pin guide long hole 19 Stop valve 20 Pressure oil supply path 61 Fixing member 62 Fixing tool 170 Hydraulic pump

Claims (4)

An elevator rope tension adjusting device attached to an elevator rope end device,
A thimble rod to which the end of the main rope of the elevator is attached;
A nut screwed into this thimble rod,
A flat washer mounted around the thimble rod and in contact with the bottom surface of the nut;
A spring that is mounted around the thimble rod and abuts the bottom surface of the flat washer at the top surface thereof;
A fixture that is mounted around the thimble rod and that abuts the bottom of the spring at its top surface and abuts the fixing member of the thimble rod at its bottom surface
A split pin that is attached to a through hole formed near the top of the thimble rod to prevent the thimble rod from falling off, and is screwed into and attached to the thimble rod from which the split pin has been removed, and the through hole of the thimble rod Is inserted into the bottom hole of the thimble rod lifting pipe formed with a male screw part on the outer periphery of the upper part, the long hole at the bottom of the thimble rod lifting pipe, and the through hole of the thimble rod. A rope retaining means including a retaining pin for preventing the thimble rod from falling off;
A hydraulic actuator fixing part having an annular collar that comes into contact with the flat washer at the bottom and allows insertion of a finger from the side, and an insertion space that allows the thimble rod to be attached to the lower part of the lifting pipe at the center. A hydraulic actuator that is mounted on the collar of the hydraulic actuator fixing portion and expands and contracts in the vertical direction; abutting on the upper surface of the hydraulic actuator at the bottom surface; and screwing into the male screw portion at the lower portion of the thimble rod lifting pipe A rope anti-rotation means including an upper part of the thimble rod lifting pipe, and a transmission device that transmits the rotational force applied to the thimble rod to the hydraulic actuator fixing part
An elevator rope tension adjusting device characterized by comprising: The elevator rope tension adjusting device according to claim 1,
A rotation pin hole formed as a through hole at the bottom of the thimble rod lifting pipe;
A detent included in the hydraulic actuator fixing portion, fixed to the collar of the hydraulic actuator fixing portion and erected from the collar, and formed with a detent pin guide slot facing the detent pin hole A pin guide,
With
The transmission tool includes a non-rotating pin inserted into the non-rotating pin guide elongated hole of the non-rotating pin guide and the non-rotating pin hole below the thimble rod lifting pipe. Elevator rope tension adjustment device. The rope tension adjusting device according to claim 1 or 2, wherein the rope tension adjusting device is attached to each of a plurality of main ropes for suspending the carriage and the balance weight.
A hydraulic pump that supplies pressure oil to each of the hydraulic actuators of the rope tension adjustment device via a pressure oil supply path;
A stop valve that is provided between the hydraulic pump and the pipe that collects the pressure oil supply paths, and that controls the flow of pressure oil between the pipe and the hydraulic pump;
A rope tension adjustment system characterized by comprising: The rope tension adjustment system according to claim 3,
The stop valve supplies pressure oil to the rope tension adjusting device, and closes the flow of pressure oil between the pipe line and the hydraulic pump in a state where each main rope is pulled up. Adjustment system.