JPH06345356A - Main rope tension adjusting method for elevator - Google Patents

Abstract

PURPOSE:To provide a main rope tension adjusting method for an elevator capable of easily and quickly performing adjusting work by eliminating necessity for adjusting height of a spring member relating to each thimble rod arranged in the inside of a machine beam with many limitations of work space. CONSTITUTION:Thimble rods 8a to 8c (8j to 8l) juxtaposed to the inside of one machine beam 6 are left as connected by a restricting plate 16 (17) for leveling height dimension of a spring member mounted on each of these thimble rods, and at the time of adjusting tension, height dimension of spring members 9d to 9f (9g to 9i) in the outside of the machine beam 6 is adjusted to be matched with height dimension of spring members 9a to 9c (9j to 9l) in the inside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator of 2: 1 roping in which a sheave is provided on a car and a counterweight, and a rope end of the main rope is supported by a machine beam in a machine room to form the main rope. The present invention relates to an elevator main rope tension adjusting method suitable for adjusting the tension of each rope within an allowable value.

[0002]

2. Description of the Related Art In addition to 1: 1 roping, an elevator system is typified by 2: 1 roping in which a sheave is provided on each of a car and a counterweight to support a rope end of a main rope in a machine room. There are multiple ropings.

FIG. 2 is a schematic diagram for explaining the overall configuration of such a 2: 1 roping elevator.

In the figure, reference numeral 1 is a hoistway, 2 is a car, 3 is a counterweight, 2a is a sheave provided on the car 2, 3a is a sheave provided on the counterweight 3, 4 Is a main rope which is wound around these sheaves 2a and 3a and suspends the car 2 and the counterweight 3 in a hook-and-loop shape. Reference numeral 5 denotes a machine room installed on the hoistway 1. In this machine room 5, a machine beam 6 and a machine beam (not shown) which are arranged substantially parallel to each other and make a pair,
A driving machine 7 and the like mounted and fixed on the pair of machine beams are installed, and a plurality of thimble rods 8 are attached to one of the illustrated specific machine beams 6 via spring members 9. The rope ends of the ropes forming the main rope 4 are different thimble rods 8 respectively.
Held in. For example, when the main rope 4 is formed of 6 ropes, a total of 12 thimble rods 8 are arranged in the specific machine beam 6. The main rope 4 is wound around the sheave 10 and the deflecting sheave 11 of the drive machine 7 in the machine room 5, and by driving the sheave 10 to rotate, the main rope 4 is ridden via the main rope 4. The car 2 and the counterweight 3 move up and down in the hoistway 1 in opposite directions.

By the way, in such an elevator, since the elevator car 2 and the counterweight 3 are repeatedly lifted and lowered while being suspended from the main ropes 4, each rope forming the main ropes 4 is stretched due to aging. Changes the tension. Therefore, it is necessary to regularly perform the tension adjustment work of adjusting the tension of each rope within the allowable value in order to ensure the safety of the elevator.

FIG. 3 is a perspective view of a rope terminal support portion for explaining an adjusting method conventionally used for adjusting the tension of the main rope.

In the figure, one of the pair of machine beams 6, 12 arranged substantially parallel to each other in the machine room 5 has one specific machine beam 6, six on each side in the longitudinal direction and six on the other side. 12 thimble rods 8a-8l in total,
Each of the twelve thimble rods 8a to 8l is attached via a spring member 9a to 9l, and the rope ends of the six ropes 4a to 4f forming the main rope are held.

That is, the six thimble rods 8a to 8f located on the front side in the drawing are respectively connected to the starting ends of the ropes 4a to 4f wound around the sheave of a car (not shown). , Thimble rods 8a, 8b, 8c juxtaposed in the inner portion 6b of the specific machine beam 6 closer to the other machine beam 12 than the rib 6a hold the start ends of the ropes 4a, 4b, 4c, respectively. , Rib 6
Thimble rods 8d, 8e, 8f arranged in parallel on the outer portion 6c of the specific machine beam 6 farther from the other machine beam 12 than a hold the start ends of the ropes 4d, 4e, 4f, respectively. Further, the six thimble rods 8g to 8l located at the back in the drawing are respectively connected to the end sides of the ropes 4a to 4f wound around the sheave of a counterweight (not shown), and specifically, , The thimble rods 8g, 8 arranged side by side on the outer portion 6c of the specific machine beam 6
h and 8i hold the ends of the ropes 4a, 4b and 4c, respectively, and thimble rods 8j, 8k and 8l juxtaposed on the inner portion 6b of the specific machine beam 6 respectively end the ropes 4d, 4e and 4f. Holding In other words, each of the ropes 4a to 4f has one end connected to the thimble rod inside the specific machine beam 6 and the other end connected to the thimble rod outside the specific machine beam 6, and specifically, , Both ends of the rope 4a are connected to the thimble rods 8a and 8g, both ends of the rope 4b are connected to the thimble rods 8b and 8h, and both ends of the rope 4c are connected to the thimble rods 8c and 8i, and both ends of the rope 4d. Is connected to the thimble rods 8d and 8j,
Moreover, both ends of the rope 4e are connected to the thimble rods 8e and 8k, and both ends of the rope 4f are thimble rods 8f and 8k.
It is connected to 8l. The ropes 4a to 4f are not connected to the other machine beam 12.

Further, the spring members 9a to 9l attached to the thimble rods 8a to 8l have their lower ends supported by the spring receivers 13a to 13l, respectively, while their upper ends are supported by the spring receiver 1a.
4a to 14l, and each spring receiver 14
Since a to 14l are respectively locked by the nuts 15a to 15l screwed onto the thimble rods 8a to 8l, the thimbles holding both ends of the ropes 4a to 4f according to the tensions of the ropes 4a to 4f. The height dimension of the spring member attached to the rod is changed.

When adjusting the tensions of the ropes 4a to 4f, the nuts 15a to 15l screwed onto the thimble rods 8a to 8l are loosened, and then the heights of all the spring members 9a to 9l are measured. After adjusting so that they are the same, tighten the nuts 15a to 15l and
The height adjustment of the spring members 9a to 9l is normally performed about three times by the procedure of performing the traveling operation of (see) and adjusting the variation of the height dimension of the spring members 9a to 9l caused by the traveling operation again. Therefore, the main rope 4 (ropes 4a-4
The tension adjustment of f) is completed.

[0011]

However, in the above-mentioned conventional main rope tension adjusting method, the specific machine beam 6 is used.
Since it is necessary to adjust the height dimension of the spring member 9 attached to all of the plurality of thimble rods 8 arranged in, the adjustment work is performed especially when the number of thimble rods 8 is large. There was a problem that was complicated. For example, when the main rope is formed of six ropes 4a to 4f as shown in FIG. 3, a total of 12 thimble rods 8a to 8l have spring members 9a to 8l respectively.
Since the height of 9 l must be adjusted, there is a limit to the improvement of work efficiency. Further, in the above-mentioned conventional main rope tension adjusting method, when the height of the spring member 9 is adjusted with respect to the thimble rod 8 arranged in the inner portion 6b of the specific machine beam 6, the machine beam 6 Since the operator has to enter the narrow space between the machine beam 12 and the other machine beam to perform the adjustment work, the work space is limited and the efficiency is low. From this viewpoint, the adjustment work is inevitable.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a method for adjusting tension of a main rope of an elevator, which allows an adjustment work to be performed simply and quickly.

[0013]

In order to achieve the above object, the present invention provides a pair of substantially parallel machine beams installed in a machine room for mounting a driving machine, and one of the two machine beams. A plurality of thimble rods are attached to both sides of the specific machine beam sandwiching a rib, and each is attached via a spring member, and an inner part of the specific machine beam closer to the other machine beam than the rib. The rope ends are respectively held by the thimble rods arranged on the outer side of the specific machine beam and the thimble rods arranged on the outer side of the specific machine beam, and the car and the counterweight are suspended to form the main rope. In a 2: 1 roping elevator equipped with a plurality of ropes to be used, in the main rope tension adjusting method for adjusting the tension of each rope within an allowable value, A plurality of the thimble rods arranged side by side in the inner part of the specific machine beam are connected by a restraint plate for leveling the height dimension of the spring member attached to each of the thimble rods. When adjusting the tension, the height dimension of the spring member engaged with each of the thimble rods arranged in parallel on the outer side portion of the machine beam is set to the inner side portion of the machine beam via the rib. It was decided to adjust according to the height of the spring member.

[0014]

According to the above-mentioned means, a plurality of thimble rods arranged side by side on the inner side of the specific machine beam are connected by the restraint plate, and the spring members attached to each of these thimble rods are connected. Since the height dimensions are leveled, the variation in the tension of each rope forming the main rope may vary depending on the height of each spring member attached to each thimble rod arranged at the outer portion of the machine beam. It appears as a variation in size. Therefore, if the height dimension of each spring member located in the outer portion of the specific machine beam is adjusted to be the same as the height dimension of the spring member located in the inner portion through the rib of the machine beam, The rope tension can be set to about the same value within the allowable value. In other words, for each thimble rod arranged inside the specific machine beam, it is not necessary to adjust the height of the spring member attached thereto, and a wide working space can be secured outside the machine beam. Only with respect to the remaining thimble rods arranged in the part, the height adjustment of the spring member attached thereto is sufficient, and the working efficiency is significantly improved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a rope terminal supporting portion for explaining the main rope tension adjusting method in this embodiment, and the portions corresponding to those in FIG. Therefore, redundant description will be omitted as appropriate.

In FIG. 1, reference numeral 16 is one side of the specific machine beam 6 in the longitudinal direction and is closer to the other machine beam 12 than the rib 6a is, and the inner portion 6b of the machine beam 6 is closer to the machine beam 6.
Of three thimble rods 8a, 8b, 8 arranged side by side
The constraint plate connecting c is shown.
Is fixed on nuts 15a to 15c screwed to these three thimble rods 8a to 8c, so that each spring member 9a, 9b, 9c attached to each thimble rod 8a, 8b, 8c. Of the spring members 9a to 9c, due to the restriction of the restraint plate 16, even if the tensions of the three ropes 4a to 4c vary.
The height dimensions of 9c are kept approximately the same. Also, reference numeral 17
Is the rib 6 on the other side in the longitudinal direction of the specific machine beam 6.
A restraint plate connecting three thimble rods 8j, 8k, 8l arranged in parallel to the inner portion 6b of the machine beam 6 closer to the other machine beam 12 than a is shown. Is these three thimble rods 8
Since it is fixed on nuts 15j to 15l screwed to j to 8l, it functions as a common upper spring bearing for each spring member 9j, 9k, 9l attached to each thimble rod 8j, 8k, 8l. Therefore, three ropes 4d ~
Even if the tension of 4f varies, the height of the spring members 9j to 9l is kept substantially equal due to the restriction of the restraint plate 17. That is, each rope 4a to 4f forming the main rope
Of the tension of the specific machine beam 6
It appears as variations in the height dimension of the spring members 9d to 9i engaged with the six thimble rods 8d to 8i arranged in c.

Reference numerals 18 and 19 in the drawing are detection holes provided at predetermined positions of the rib 6a for visually observing the height dimension of each spring member located in the inner portion 6b of the specific machine beam 6. , Spring members 9a to 9c using the detection holes 18
Of the spring members 9j to 9l can be easily visually recognized by utilizing the detection hole 19.

Now, in an elevator in which members supporting the rope ends of the main rope are arranged in the specific machine beam 6 in the machine room 5 as shown in FIG. 1, of the ropes 4a to 4f forming the main rope. When adjusting the tension, one side of the specific machine beam 6 in the longitudinal direction (the restraining plate 16 on the front side in the figure) is used.
The height dimension of the spring members 9d to 9f located on the outer side 6c is the same as the height dimension of the spring members 9a to 9c located on the inner portion 6b with the rib 6a sandwiched therebetween and visible through the detection hole 18. And the height dimension of the spring members 9g to 9i located in the outer portion 6c on the other side in the longitudinal direction of the specific machine beam 6 (on the side of the constraining plate 17 in the drawing) of the specific machine beam 6 is sandwiched between the ribs 6a. Located in the inner part 6b at the detection hole 19
By adjusting the heights of the spring members 9j to 9l to be the same as those visible through the ropes, the ropes 4a to 4a are adjusted.
The tension of f can be set to a substantially equal magnitude within the allowable value.

That is, the heights of the spring members 9a to 9f on the side of the restraint plate 16 (car side) are made equal, and the heights of the spring members 9g to 9l on the side of the restraint plate 17 (counterweight side) are the same. If the dimensions are made equal, both ends are thimble rods 8.
a, tension of rope 4a connected to 8g, and rope 4b whose both ends are connected to thimble rods 8b and 8h.
And the tension of the rope 4c whose both ends are connected to the thimble rods 8c and 8i and the both ends of the thimble rod 8c.
tension of rope 4d connected to d and 8j and rope 4e connected to thimble rods 8e and 8k at both ends.
And the tension of the rope 4f whose both ends are connected to the thimble rods 8f and 8l are all set to the same magnitude. If the tensions of the ropes 4a to 4f are set to be substantially equal to each other within the allowable value, the height dimensions of the spring members 9a to 9f on the restraint plate 16 side and the spring members on the restraint plate 17 side are set. There is no problem even if the height dimension is different from 9 g to 9 l.

In this way, the restraint plates 16 and 17 are attached to the inner portion 6b of the specific machine beam 6 to attach the ropes 4a to 4a.
The variation of the tension of 4f is caused by the outer portion 6 of the machine beam 6.
If the height dimensions of the spring members 9d to 9i located at c appear as variations, the machine beam 6
Each thimble rod 8a arranged on the inner part 6b of the
8c and 8j to 8l, it is not necessary in principle to adjust the height of each spring member 9a to 9c and 9j to 9l attached thereto, so that a narrow space between the pair of machine beams 6 and 12 is provided. There is no need for an operator to go in and perform complicated adjustment work. Then, only with respect to the remaining thimble rods 8d to 8i arranged in the outer portion 6c of the specific machine beam 6 capable of ensuring a wide working space, the height adjustment of the spring members 9d to 9i attached thereto is performed. Therefore, after all, the total number of thimble rods that require height adjustment of the spring member is six out of the total of twelve rods, which is the half of the thimble rods. The tension adjustment work can be performed easily and quickly.

[0022]

As described above, in the main rope tension adjusting method according to the present invention, the variation in the tension of each rope forming the main rope is determined by the height dimension of each spring member located outside the specific machine beam. The tension of each rope can be set to almost the same level by adjusting the heights of these spring members so that the tension of each thimble rod that requires the height adjustment of the spring members can be adjusted. The number is drastically reduced, and adjustment work in a narrow work space between a pair of machine beams is not required, work efficiency is significantly improved, and the main rope tension adjustment work can be performed easily and quickly. Can be expected.

[Brief description of drawings]

FIG. 1 is a perspective view of a rope terminal support portion for explaining a main rope tension adjusting method in an embodiment.

FIG. 2 is a schematic diagram for explaining the overall configuration of a 2: 1 roping elevator.

FIG. 3 is a perspective view of a rope terminal supporting portion for explaining a main rope tension adjusting method in a conventional example.

[Explanation of symbols]

 2nd basket 3 Balance weight 4, 4a-4f Rope 5 Machine room 6 Specific machine beam 6a Rib 6b Inner part 6c Outer part 7 Driving machine 8, 8a-8l Thimble rod 9, 9a-9l Spring member 12 (other) Machine beam 16,17 Restraint plate 18,19 Detection hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Okawa 1070 Ige, Katsuta City, Ibaraki Prefecture Hitachi Ltd. Mito Plant

Claims (1)

[Claims] 1. A pair of substantially parallel machine beams installed in a machine room for mounting a driving machine, and a plurality of machine beams on both sides of one specific machine beam of the two machine beams. , And the thimble rods each attached via a spring member, and the particular machine beam farther from the thimble rods disposed inside the particular machine beam closer to the other machine beam than the ribs. A 2: 1 roping elevator equipped with thimble rods arranged on the outer side of the rope and a plurality of ropes each holding a rope end and forming a main rope by suspending a car and a counterweight. In the main rope tension adjusting method for adjusting the tension of each of the ropes within a permissible value, a plurality of the above-mentioned ropes arranged side by side in the inner portion of the specific machine beam are provided. The thimble rods are connected by a restraint plate for leveling the height dimension of the spring members attached to each of the thimble rods, and are juxtaposed to the outer portion of the machine beam when adjusting the tension. The height dimension of the spring member attached to each of the thimble rods is adjusted according to the height dimension of the spring member located inside the machine beam through the rib. How to adjust the main rope tension of an elevator.