JP2002003128A - Counterweight elevator elevator - Google Patents

Abstract

(57) [Problem] To provide an elevator lifting / lowering device capable of preventing occurrence of slack of a rope even when a plurality of ropes are fed differently due to a manufacturing error of a drive pulley. SOLUTION: A drive pulley 6 for driving an elevator E up and down.
The elevator E and the counterweight are connected to each other by two ropes wound around the elevator E, and the single elevator pulley 2 attached to the elevator E
And a single weight pulley 4 attached to the counterweight, and an elevator pulley 2 and a loop-shaped rope 5 wrapped around the weight pulley 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an elevator elevating device. More specifically, the present invention relates to a device for raising and lowering a person elevator, a vehicle lifting elevator, and the like, and a device for raising and lowering while maintaining a weight balance between the elevator and a counterweight.

[0002]

2. Description of the Related Art Conventionally, a counterweight type lifting device has been known as an elevator lifting device. For example, JP-A-62-264
188, JP-A-5-18134, and Patent No. 5
No. 14,408, and the like. This lifting device includes a plurality of wire ropes (hereinafter simply referred to as ropes).
The elevator is connected to one end of the vehicle and a single counterweight is connected to the other end. The rope is moved by the rotation of a drive pulley (also referred to as a sheave) to move the elevator up and down. The counterweight is intended to reduce the driving force and achieve a smooth ascent and descent by balancing the weight as much as possible with the elevator.

As shown in FIG. 5 (a), this counterweight type lifting device 51 has a single drive pulley 52, and a rope 53 wound around the drive pulley 52.
The number of the engagement grooves 54 corresponding to the number is formed. One ends of the plurality of ropes 53 are collectively fixed at one place on the ceiling of the elevator 55, and the other ends are collectively fixed at one place on the counterweight 56.
The reason why the plurality of ropes 53 are used is that ease of winding around the drive pulley 52 and ease of forming a groove for the rope of the drive pulley 52 are taken into consideration.

However, when the engagement grooves 54 are formed in the drive pulley 52, the pitch circle diagram (PCD) often varies between the engagement grooves 54 due to a manufacturing error or the like. When the degree of this variation is large (see FIG. 5 (b)), the large-diameter engagement groove 54a and the small-diameter engagement groove 54b form the rope 5 per rotation of the drive pulley 52.
The feed amount of No. 3 is different. When moving up and down the predetermined height, the drive pulley 52 is rotated many times, so that the difference in the feed amount increases. Then, the drive pulley 52 is sandwiched between the rope 5
A tension difference occurs between the elevator side and the counterweight side of No. 3. Some ropes are subject to high tension and some are slack. As a result, slippage occurs between the rope 53 and the engagement groove of the driving pulley 52, and the life of the two 52, 53 may be shortened due to their wear.

In the elevating device 51, the connection of the plurality of ropes 53 to the elevator 55 is taken as an example, but one end of the plurality of ropes 53 is used as in the device described in the above-mentioned prior art. Multiple sides of the elevator on the side (four corners and front and back)
The same problem may occur when the parts are separately mounted.

The present invention has been made to solve such a problem, and can prevent a tension difference and a resultant slack between a plurality of ropes connecting a counterweight and an elevator. It is intended to provide an elevator elevating device.

[0007]

SUMMARY OF THE INVENTION An elevator lifting apparatus according to the present invention is a counterweight type in which an elevator and a counterweight are connected by a rope having two portions wound around a drive pulley for driving the elevator up and down. An elevator elevating device, comprising: a single elevator pulley attached to an elevator; a single weight pulley attached to a counterweight; and a loop rope wound around the elevator pulley and the weight pulley. ing.

[0008] According to this configuration, even if there is a manufacturing error in the diameter of the portion of the drive pulley around which the rope is wound and the feed amount of the plurality of ropes by the drive pulley is different, the elevator pulley and the weight pulley are provided. However, since the part of the rope which is going to cause the slack is fed, the difference in tension and the occurrence of the slack are prevented. As a result, slippage between the rope and the drive pulley is also prevented.

Another elevator lifting device of the present invention is a counterweight type elevator lifting device in which an elevator and a counterweight are connected by a rope having a plurality of portions wound around a drive pulley for driving the elevator up and down. A single first-stage pulley attached to the elevator, a single first-stage pulley attached to the counterweight, and the elevator side and the counterweight assuming that N is an arbitrary integer starting from 2. And (N-1) -th stage pulleys each having a common N-stage pulley, and ropes having both ends wound around the respective (N-1) -th stage pulleys,
The N-th stage pulley is fixed to each end of the rope, and the number of the pulleys in the N-th stage is 2 (N-1) power, and the number of the pulley is the same as the last integer stage common to the elevator side and the counterweight side. A loop-shaped rope looped between the pulleys is further provided.

According to such a configuration, even if the number of ropes is increased in order to reduce the diameter of the ropes, it is possible to prevent the tension difference and the slack from occurring in the ropes due to the presence of the pulley.

Another elevator lifting device of the present invention is a counterweight type elevator lifting device in which an elevator and a counterweight are connected by a rope having two portions wound around a drive pulley for driving the elevator up and down. There is a single elevator pulley attached to the elevator, a rope having both ends wrapped around the elevator pulley, and a lower weight connected to each end of the rope.

According to such a configuration, slack is prevented from being generated due to the presence of the pulley in the rope portion on the elevator side from the drive pulley. In addition, with respect to the rope portion on the counterweight side with respect to the drive pulley, since each rope is pulled by a different counterweight, the occurrence of a difference in tension and slack is similarly prevented.

Another elevator lifting apparatus of the present invention is a counterweight type elevator lifting apparatus in which an elevator and a counterweight are connected by a rope having a plurality of portions wound around a drive pulley for driving the elevator up and down. A single first-stage pulley attached to the elevator; an N-stage pulley provided on the elevator side, where N is an arbitrary integer in the order of 2;
1) A rope having both ends wound around each of the step pulleys, and an N-th step pulley is fixed to each end of the rope, and the number of the pulleys in the N-th step is 2 (N-1). ), Further comprising a final rope having both ends respectively wound around pulleys of the final integer, and counterweights respectively fixed to both ends of each final rope.

According to this configuration, even if the number of ropes is increased in order to reduce the diameter of the rope, a tension difference and a slack occur in the rope due to the presence of the pulley and the presence of the counterweight for each rope. Is prevented.

[0015] In the above-mentioned lifting device, in which the pulley is not provided on the counterweight,
When the counterweight has a groove or navel formed so that the counterweights can slidably engage with each other, the plurality of counterweights are not separated from each other in the lateral direction. Relative movement is possible in the vertical direction. By doing so, the member for guiding the up / down movement of the counterweight may be the same as in the case of a single counterweight. There is no need to add a new guide member.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an elevator elevating apparatus (hereinafter, simply referred to as an elevating apparatus) of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an embodiment of a lifting device according to the present invention. FIG. 2 is a perspective view showing another embodiment of the lifting device of the present invention. FIG. 3 is a perspective view showing still another embodiment of the elevating device of the present invention. FIG. 4 is a perspective view showing still another embodiment of the lifting device of the present invention.

The elevator 1 shown in FIG. 1 includes a pulley (referred to as an elevator pulley) 2 mounted near the center of the ceiling of an elevator E to be raised and lowered, and a counterweight 3.
A pulley (referred to as a weight pulley) 4 attached near the center of the upper surface of the vehicle, and a loop-shaped wire rope (hereinafter simply referred to as a rope) 5 wound around the pulleys 2 and 4. That is, the elevator E and the counterweight 3 are connected by the loop rope 5. The elevator E is raised and lowered while being balanced in weight by the counterweight 3. Only half the tension is applied to the rope 5 as compared to a single rope.

Reference numeral 6 denotes a drive pulley, and a drive motor 6a
Is rotated in forward and reverse directions. The rope 5 is hung on a drive pulley 6, and is sent in both directions by a frictional action due to the forward / reverse rotation of the drive pulley 6. Therefore, there are two portions of the rope 5 hanging on the drive pulley 6. Two mutually parallel V-grooves (engagement grooves having a V-shaped groove cross section) 7a and 7b with which the rope 5 is engaged are formed on the outer peripheral surface of the drive pulley 6. Reference numeral 8 denotes a turning pulley, and one or more turning pulleys are provided as necessary from a space where the elevator E and the elevating device 1 are provided.

As described above, the elevator lifting rope 5
Is looped around the pulleys 2 and 4 between the elevator E and the counterweight 3, so that the slack of the rope caused by the manufacturing error of the engagement groove which occurs in the prior art is eliminated. Due to manufacturing errors, for example, one V-groove 7
It is assumed that a has a large diameter and the other V groove 7b has a small diameter. By the clockwise rotation of the drive pulley 6 (drive for raising the elevator E), the feed amount of the rope portion 5a engaged with the large-diameter groove 7a is increased by the amount of the rope portion 5b engaged with the small-diameter groove 7b. More than the feed amount. In the case of the prior art, although the slack occurs in the elevator-side portion of the rope portion 5b engaged with the small-diameter groove 7b at the boundary of the drive pulley 6,
In the above embodiment, since the portion 5b is sent to the large diameter side by the elevator pulley 2, there is no difference in tension or slack.

The same applies to the rope portion from the drive pulley 6 to the counterweight side. That is, in the above-described case, according to the related art, slack is generated from the drive pulley 6 of the rope portion 5a engaged with the large-diameter groove 7a to the counterweight-side portion. No slack occurs because it is sent to the small diameter side by 4.

As described above, the rope 5 does not slip between the groove 7 of the drive pulley 6 and the rope 5.

FIG. 2 shows an elevating type elevating device 11 based on the same principle as the elevating device 1 described above. This lifting device 1
According to 1, the rope 15 receives only one-fourth the tension as compared with a single rope.

The lifting device 11 includes an elevator pulley (also referred to as a first-stage pulley) 12 mounted near the center of the ceiling of the elevator E and a weight pulley (first pulley) mounted near the center of the upper surface of the counterweight 13. 14), first-stage ropes 15a and 15b having both ends respectively wound around both pulleys 12 and 14, and second-stage pulleys fixed to both ends of each first-stage rope 15a and 15b, respectively. 18a, 18b, 18c and 18d, and two loop-shaped ropes 19 and 20 wound around the second-stage pulleys 18a, 18b, 18c and 18d. One loop-shaped rope 19 is wound around one second-stage pulley 18a on the elevator side and one second-stage pulley 18c on the counterweight side, and the other loop-shaped rope 20 is wound around the other second-stage pulley 18c on the elevator side. It is wound around the second pulley 18b and the other second pulley 18d on the counterweight side.

Therefore, on the outer peripheral surface of the drive pulley 16,
Four mutually parallel V-grooves 17a, 17b, 17c, 17d for engaging the loop-shaped ropes 19, 20 are formed. A pair of V-grooves 17a, 17 wound around one of the second-stage pulleys 18a, 18c and having an error in diameter.
Considering the rope 19 engaged with c, no slack occurs in any part of the rope 19 due to the presence of the second-stage pulleys 18a and 18c, as in the description of the embodiment of FIG. 1 described above. A pair of V-grooves 17 wound around the other second-stage pulleys 18b and 18d and having a difference in diameter due to an error.
Similarly, for the rope 20 engaged with the ropes b and 17d, the slack does not occur in any part of the rope 20 due to the presence of the second-stage pulleys 18b and 18d.

Next, when there is a difference between the average diameter of one pair of V-grooves 17a, 17c and the average diameter of the other pair of V-grooves 17b, 17d, slack occurs in either of the ropes 19, 20. Will it be? This is the first stage pulleys 12, 14
Also, due to the presence of the first-stage ropes 15a and 15b, no slack occurs in any of the ropes 19 and 20 by the same reasoning as described above.

The tension of the loop-shaped ropes 19 and 20 is 1/4 of the tension when the elevator and the counterweight are simply connected by a single rope, but the tension generated on the first-stage ropes 15a and 15b, respectively. Is 1/2 of the case of the single rope. Therefore, the first rope 15
The cross-sectional area of a and 15b is at least twice the cross-sectional area of the loop ropes 19 and 20. First stage rope 15a,
The length 15b is short as long as it can absorb the slack between the loop ropes 19 and 20.

From the above, the ropes 19 and 20 are driven by the pulley 1
6 does not slip between the grooves 17.

In the lifting device 11, the pulleys are only the first and second stages, but may be increased to the third and fourth stages. The number of ropes increases accordingly.

For example, the second-stage pulleys 18a, 18b, 1
8c and 18d, instead of the loop-shaped ropes 19 and 20,
Although not shown, a rope having both ends is wound around each, and a third-stage pulley is fixed to each end of the rope,
The loop rope is wound around the third-stage pulleys on the elevator side and the counterweight side. Then, no slack occurs in any part of any loop rope.

In this way, if an arbitrary Nth stage (where N is an integer from 2) is provided in addition to the first stage pulley, the Nth stage pulley on each of the elevator side and the counterweight side is provided. Is 2 to the power of (N-1). The number of the (N-1) th stage ropes having both ends on the elevator side and the counterweight side is 2 (N-2) th. That is, the pulley and the rope having both ends increase in a pyramid shape.
The number of loop-shaped ropes is 2 (N-1). In the case of the N-th stage, the tension generated in the loop-shaped rope is （times the power of the single rope (N−1).
For confirmation, N = 1 means a pulley (first-stage pulley) directly attached to each of the elevator and the counterweight.

FIG. 3 shows a lifting device 2 according to another embodiment.
1 is shown. This lifting device 21 has a pulley 22 only on the elevator side, and no pulley on the counterweight side. However, the counter weight is divided into two, not one, 23a and 23b. The lifting device 21 does not cause the rope 25 to sag.
Further, both counterweights 23a and 23b are set to the same weight.

An elevator pulley 22 mounted near the center of the ceiling of the elevator E, and V grooves 27a, 27b of a drive pulley 26 wound around the elevator pulley 22
And a rope 25 having both ends fixed to counter weights 23a and 23b at both ends thereof. That is, the elevator E and the counterweights 23a and 23b are connected by the end rope 25.

In the lifting device 21, as shown in the drawing, the portions of the rope 25 on the counterweight side from the drive pulley 26 are pulled by the counterweights 23a and 23b, respectively, so that no slack occurs. On the other hand, the part on the elevator side from the drive pulley 26 is the drive pulley 2
Even if there is a difference in diameter between the V grooves 27a and 27b of No. 6, the rope portion on the small diameter side is sent to the rope portion on the large diameter side due to the presence of the elevator pulley 22, so that no slack occurs.

A pair of counterweights 23a, 23b
Are vertically slidable with respect to each other. That is, the engagement groove 24a is formed on one counterweight 23a, and the engagement groove 2a is formed on the other counterweight 23b.
Engagement ridge (so-called navel) 24 with which 4a slidably engages
b is formed. Therefore, the counter weights 23a and 23b can move up and down without being separated from each other in the horizontal direction. Therefore, V groove 2
Even if there is a difference between the diameters of the ropes 7a and 27b and a difference in feed amount between both sides of the rope 25, the counterweight 2
3a and 23b can be mutually displaced smoothly in the vertical direction without being separated. Thus, even if there are a plurality of counterweights, the members (not shown) for guiding the up / down movement of these counterweights may be the same as in the case of a single counterweight. There is no need to add a new guide member.

According to the elevating device 21, only a half of the tension is applied to the rope 25 as compared with the case of a single rope.

FIG. 4 shows an elevating type elevating device 31 based on the same principle as the elevating device 21 described above. According to the elevating device 31, only one-fourth the tension is applied to the rope 35 as compared with a single rope.

The lifting device 31 includes a first pulley 32 attached near the center of the ceiling of the elevator E, and a first rope 3 having both ends wound around the first pulley 32.
5, second pulleys 38a, 38b fixed to both ends of the first rope 35, and second pulleys 38a, 38b, respectively.
Two ropes, two-stage ropes 39 and 40, each having both ends wound therearound, and a total of four counterweights 33a, 33b, 33c fixed to both ends of each second-stage rope 39, 40, respectively. 33d.

As shown in the drawing, the portions of the second-stage ropes 39, 40 on the counterweight side from the drive pulley 36 as shown in FIG.
There is no sagging because it is pulled by a, 33b, 33c and 33d.

On the other hand, when considering the rope portion from the drive pulley 36 to the elevator side, the second pulley 3 is engaged with the pair of V-grooves 37a and 37b having an error in diameter.
The second-stage rope 39 wound around 8a does not slack any portion of the rope 39 due to the presence of the second-stage pulley 38a, as described in the embodiment of FIG. 3 described above. Similarly, the second-stage rope 40 engaged with the pair of V-grooves 37c and 37d having an error in diameter and wound around the other second-stage pulley 38b also has the same structure as the second-stage pulley 38b. No sag occurs in any part.

Next, when there is a difference between the average diameter of one pair of V-grooves 37a and 37b and the average diameter of the other pair of V-grooves 37c and 37d, the first-stage pulley 32 and the first-stage rope 35 are also provided. Does not cause any slack in any of the two second-stage ropes 39 and 40.

The tension of the second-stage ropes 39 and 40 is one-fourth of the tension when the elevator and the counterweight are simply connected by a single rope. This is twice the tension of the two-step ropes 39 and 40. Therefore, the cross-sectional area of the first ropes 35 is at least twice as large as the cross-sectional area of each of the second ropes 39 and 40. The length of the first rope 35 is short as described above.

As described above, the second-stage ropes 39 and 40 do not slide between the grooves 37 of the drive pulley 36.

Also in the lifting device 31, the four counterweights 33a, 33b, 33c, 33d are vertically slidable by an engagement groove 34a and an engagement ridge 34b. That is, the counterweights can move relative to each other only in the vertical direction without being separated in the horizontal direction.

In the lifting device 31, the number of pulleys is only the first step and the second step. However, the number of pulleys may be increased to the third step and the fourth step.

For example, a third pulley is fixed to each end of each of the second ropes 39 and 40, and the third rope is wound around the third pulley. A counterweight may be fixed to each end of each third-stage rope. Then no slack will occur in any part of any of the ropes.

In this way, if an arbitrary Nth stage (where N is an integer from 2) is provided in addition to the first stage pulley, the number of the Nth stage pulley on the elevator side is two. (N-
1) It becomes the number of powers. Also, the number of N-th stage ropes having both ends is 2 (N-1) th power. In the case of the N-th stage, the tension generated in the loop-shaped rope is （times the power of the single rope (N−1).

[0048]

According to the present invention, even if there is a manufacturing error in the diameter of the portion of the drive pulley around which the rope is wound, even if the feed amount of the plurality of ropes by the drive pulley is different, the slack of the rope is reduced. Is prevented from occurring. As a result, slippage between the rope and the drive pulley is also prevented, and shortening of the life due to wear and the like is prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a lifting device according to the present invention.

FIG. 2 is a perspective view showing another embodiment of the lifting device of the present invention.

FIG. 3 is a perspective view showing still another embodiment of the lifting device of the present invention.

FIG. 4 is a perspective view showing still another embodiment of the lifting device of the present invention.

5A and 5B are side views showing an example of a conventional elevating device. FIG. 5A shows a state before the elevating drive, and FIG. 5B shows a state during or after the elevating drive.

[Explanation of symbols]

1, 11, 21, 31 ··· Lifting device 2, 22 · · · · elevator pulley 3, 13, 23a, 23b, 33a, 33b, 33c, 33d ··· counterweight 4 ··· weight pulley 5, 25... Rope 5a... (Large-diameter side) rope section 5b... (Small-diameter side) rope section 6, 16, 26, 36... Drive pulley 7a. · (Large diameter) V groove 7b ··· (Small diameter) V groove 8 ··· Deflection pulley 12 ··· First stage pulley (on elevator side) 14 ··· (on counterweight side) First-stage pulleys 15a, 15b, 35 ... first-stage ropes 17a to 17d, 27a, 27b, 37a to 37d ... V-grooves 18a, 18b ... second-stage pulley 18c (on the elevator side) , 18d ··· The second stage (on the counterweight side) Pulleys 19, 20 Loop ropes 24a, 34a Engagement grooves 24b, 34b Engagement ridges 32 First stage pulleys 38a, 38b ... second Step pulley 39, 40---Second stage rope E--Elevator

Claims (5)

[Claims] 1. A counterweight type elevator elevating device in which an elevator and a counterweight are connected by a rope having two portions wound around a drive pulley for driving the elevator up and down, the elevator being attached to the elevator. With a single elevator pulley,
An elevator elevating device comprising a single weight pulley attached to a counterweight, an elevator pulley, and a loop-shaped rope looped around the weight pulley. 2. A counterweight type elevator elevating device in which an elevator and a counterweight are connected by a plurality of ropes wound around a drive pulley for driving the elevator up and down, the elevator being attached to the elevator. A single first-stage pulley, a single first-stage pulley attached to the counterweight, and a common one disposed on the elevator side and the counterweight side, where N is an arbitrary integer in the order from 2 N-stage pulleys, and a rope having both ends wound around each of the (N-1) -th stage pulleys. An N-th stage pulley is fixed to both ends of the rope, respectively. The number of the pulleys in (2) is the power of (N-1), and the number of pulleys in the final integer stage common to the elevator side and the counterweight side is looped between the pulleys. Elevator elevator with additional ropes. 3. A counterweight type elevator elevating device in which an elevator and a counterweight are connected by a rope having two portions wound around a drive pulley for driving the elevator up and down, the elevator being attached to the elevator. With a single elevator pulley,
A rope having both ends wrapped around an elevator pulley,
An elevator elevating device having a weight that is connected to both ends of the rope. 4. A counterweight type elevator elevating device in which an elevator and a counterweight are connected by a plurality of ropes around a drive pulley for driving the elevator up and down, the elevator being attached to the elevator. A single first-stage pulley; N-stage pulleys provided on the elevator side, where N is an arbitrary integer from 2; and both ends wrapped around the (N-1) -th stage pulley, respectively. And an N-th stage pulley is fixed to each end of the rope, wherein the number of the pulleys at the N-th stage is 2 (N-1) power, and An elevator elevating apparatus further comprising: a final rope having both ends wound around each other, and counterweights fixed to both ends of each final rope, respectively. 5. The elevator elevating device according to claim 3, wherein a groove or a navel is formed in the counterweight so that the counterweights can slidably engage with each other.