KR100708785B1 - Method of belt tensioning in an elevator system - Google Patents

Abstract

According to the present invention, a plurality of belts having a first end having a positionally movable moving pressing piece and a second end having a pressing piece and supporting a load of an elevator system, and a first end of the plurality of belts being supported 1 is provided with a plurality of first springs mounted to the first support in correspondence with the support and the plurality of belts and pressed against the first support by the moving pressing pieces of the belt when the load of the system increases. A first end portion, a second support on which the second ends of the plurality of belts are supported, and a second support corresponding to the plurality of belts, the press pieces of the belt being mounted when the load of the system increases; A method of uniformly adjusting the tension of a plurality of belts in an elevator system comprising a second end with a plurality of second springs pressed against a second support. Therefore, when the position of the moving pressing piece of one selected belt is changed, the corresponding factor of the uncoupled relationship that is changed in the selected belt and does not change in the other belt, and the corresponding factor according to the change in the position of the moving pressing piece. A belt tension control method of an elevator system is disclosed that obtains a positional correction value of moving pressure piece of each belt necessary to equalize the tension of all the belts by using a characteristic value satisfying an uncoupled relationship.

 Pressing piece, elevator, belt, tension, uncoupled, adjustment, calibration

Description

Belt tension adjustment method of elevator system {METHOD OF BELT TENSIONING IN AN ELEVATOR SYSTEM}

1 is a perspective view of a machine roomless elevator system.

2 is a front view of the elevator car side belt termination of the main belt;

3 is a front view of the elevator machine side belt termination of the main belt;

4 is a flowchart showing a process of obtaining an art number.

5 is a flow chart of a tension adjustment process.

<Explanation of symbols for the main parts of the drawings>

50: elevator car side belt termination (car side end)

70: elevator machine side belt termination (machine side end)

100: machine roomless elevator system

The present invention relates to a machine-roomless elevator system, and more particularly, in a machine-roomless elevator system using a plurality of belts as a load supporting member for supporting loads such as elevator cars and counterweights. It relates to a belt tension adjusting method for adjusting the tension of each belt so that the belts have a uniform tension with each other.

1 shows an example 100 of a machine roomless elevator system, an elevator system of the type without a machine room. The illustrated elevator system utilizes a plurality of belts as load supporting members 30 such as elevator cars and counterweights.

If the tension of each belt in the load supporting member 30 is different from each other, the life of a particular belt may be greatly shortened or may cause noise of the system. For this reason, it is necessary to adjust the tension of each belt during installation or maintenance of the elevator system so that all the belts have a uniform tension of appropriate size.

One of the opposite ends of the load bearing member 30 is mounted on the elevator car side belt termination 50 (hereinafter referred to as the "car side termination"), and the other is the elevator machine side belt termination 70 (hereinafter referred to as the "machine side termination". Wealth ”).

2 shows the car end 50 in detail. The illustrated elevator system is equipped with five belts 31 to 35.

At the car end 50, one end of the belt is fixed to the corresponding socket 42, respectively. One end of the rod 40 is fixed to the socket 42 to which the first belt 31 is coupled, and a male screw portion 51b is formed at the other end of the rod. A nut 51n is coupled to the male screw portion 51b, and a washer 44 is positioned below the nut 51n. A spring 51s is positioned around the rod 40 between the washer 44 and the car side support 46. The remaining belt is also held at the car end 50 in a manner similar to the first belt.

3 shows the machine side termination 70 in detail.

The other end of the belt at the machine side end 70 is fixed to the corresponding socket 62, respectively. One end of the rod 60 is fixed to the socket 62 to which the first belt 31 is coupled. A male screw is formed at the other end of the rod, and a nut 71n is coupled thereto. A washer 64 is positioned below the nut 71n, and a spring 71s is positioned around the rod 60 between the washer 64 and the machine support 66. The remaining belt is also held at the machine side end 70 in a similar manner to the first belt.

As can be seen from Figs. 2 and 3, each belt is fixed at both ends via springs 51s to 55s and 71s to 75s, so that the tension of the belt is increased according to the increase or decrease of the load applied to each belt. When the change is made, a change occurs in the length Ac of the car side end springs 51s to 55s and the length Am of the machine side end springs 71s to 75s.

On the other hand, the tension of each belt can be adjusted by changing the nut position value Bc which means the distance from the upper end of the male screw part of the said belt to an adjustment nut.

In this belt fixing configuration, the method according to the prior art for adjusting the tension of each belt so that all the belts 31 to 35 of the load supporting member has a uniform tension has a spring (51s to 55s) of the car end 50. The positions of the nuts 51n to 55n at the end of the car side are changed to have the same length Ac. In this method, when the length Ac of all the springs 51s to 55s of the car end 50 is adjusted by adjusting the positions of the nuts 51n to 55n, the belt is considered to have a uniform tension. It was.

However, since the tension of the belt is related not only to the car end spring but also to the machine end spring, it is possible to ignore the spring state of the machine end and to determine and adjust the tension of the belt only by the spring length of the car end. The tension adjustment method is not an accurate method.

In addition, even if the accuracy is acknowledged, the conventional tensioning method is very difficult and complicated to perform because of the coupled relation between the position change of the nut and the change in the length of the spring. The term "coupled relationship between the change in the position of the nut and the change in the length of the spring" does not only change the length of the car end spring of the belt when one nut position is changed, This means that the lengths of the springs of the car side end and the machine side end of the remaining belts all change in relation.

Because of this coupled relationship, changing the position of the nut of the belt for the purpose of adjusting the length of a specific spring at the end of the car will cause a change in the length of the target spring, but also in the length of other undesired springs. This will not be easy.

Such a coupled relationship can be explained well by the following equation.

Equation 1

Where n is the number of belts, and delta Bc _i is the distance between the car end nut 51n to 55n (hereinafter referred to as the "i-th nut") of the i-th belt and the upper end of the bolts 51b to 55b. The change amount means the position change amount of the nut, and delta Ac _h means the change amount of the length of the h-th spring of the car end with respect to the position change amount (delta Bc _i ) of the i-th nut. In addition, delta Am _h means the amount of change in the length of the h-th spring of the machine side end with respect to the position change (delta Bc _i ) of the i-th nut, TM _ji is the angle of change in the position change (delta Bc _i ) of the i-th nut Means the tensor of the matrix specifying the change in spring length.

The matrix on the right is a matrix of size nx 1, the matrix on the left is 2n x 1, twice its size, and the matrix on the center is 2n xn, with one element on the left associated with all elements on the right and one on the right. It shows that the element is related to all the elements on the left. For example, delta Ac ₁ , the one element on the left side, is expressed as follows.

delta Ac ₁ = TM ₁₁ x delta Bc ₁ + ... + TM _1j x delta Bc _i + ...

+ TM_1n x delta Bc_n Equation 2

As such, it can be seen that delta Ac ₁ is associated with the position change amounts (delta Bc ₁ to delta Bc _n ) of all the nuts on the right side. Rearranging this equation shows that one nut position change amount (delta Bc _i ) on the right side is equally related to all spring length change amounts on the left side. That is, the change in the length of all the springs on the left side is related to the change in the position of one nut on the right side.

Because of the “coupled relation” between the change in position of the nut and the length of the spring described above, the total spring length is changed when the position of the nut is changed by a certain amount to adjust the length of a particular spring at the end of the car side. By throwing away, the tension control method of the prior art is cumbersome and requires considerable time to complete the actual adjustment.

SUMMARY OF THE INVENTION The present invention has been made to solve this problem, and an object thereof is to provide a faster and more accurate belt tension adjusting method that can uniformly adjust the tension of all belts in an elevator system using a belt as a load supporting member.

The object of the present invention as described above is that the car end of the belt is introduced by introducing a corresponding factor inherent to the belt that is changed in the belt but not changed in the other belt when the nut position of the car end of the belt is changed. It can be achieved using an uncoupled relationship between the amount of negative nut position change and the inherent corresponding factor.

According to the present invention, one reference belt is selected from all the belts, and the relative tension equivalent value representing the difference between the tension equality of each belt and the tension equality of the reference belt in each belt is uncoupled from the change of nut position of one belt. As a corresponding factor of the rod relationship, a characteristic value satisfying the uncoupled relationship between the change in the nut position and the relative tension equivalence is introduced, and the tension of all the belts is adjusted by the relationship of the corresponding factor = characteristic value x nut correction value. Provides a tension control method for knowing the nut position correction of each belt for uniformity.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 3.

1 shows a machine roomless elevator system 100 using belts 31 to 35 as load bearing members of an elevator car and counterweight. 2 and 3 show front views of a car side end portion 50 (elevator car side belt termination) and a machine side end portion 70 (elevator machine side belt termination) holding both ends of the belts 31 to 35.

In the embodiment, a case in which five belts of the first to fifth belts 31 to 35 are used in total is taken as an example. In the description, "i-th nut" means the nut of the i-th belt.

First course

The belt tension adjusting method of the present invention is to change the belt-specific change element that is changed in the belt but not changed in the other belt when the position value Bc of the car end nut of the belt of any one belt is changed. The position change of the car end nuts 51n to 55n and the uncoupled relationship between these changing elements allow the user to find the amount of change in the nut position (calibration value) of each belt necessary to equalize the belt tension. It is characterized by.

In the description of the specification, the term “uncoupled relation between a first element and a second element” means that when the first element of one belt is changed, only the second element of that belt of the second element is changed. Means that the second element of the remaining belt is unchanged, for example, when the first element of the first belt is changed, only the second element of the first belt is changed and the remaining second to fifth belts are changed. Does not change, the second element of the third belt is changed only when the first element of the third belt is changed, and the second elements of the remaining first and second belts and the fourth and fifth belts are changed. That is, according to the uncoupled relationship, when the first element of any i-th belt is changed, only the second element of the i-th belt of the second element of each belt changes correspondingly.

The position change of the nuts 51n to 55n corresponding to the first element is described with the position change amount delta Bc of the nut in the embodiment of the present invention. The nut position change amount (delta Bc) of each belt finally obtained by the method of the present invention is a nut position correction value for uniformizing the tension of all belts, and may have three kinds of values: positive, negative, or zero. The value of means that the nut should be moved in the direction of tightening the nut further from the initial nut position, the negative value means the opposite, and the zero value means no need to adjust the nut position.

As a second element that changes in an uncoupled relationship with respect to the position change amount (delta Bc) of the nut, a preferred TSL is used in the preferred embodiment of the present invention.

Relative tension value means the difference between the tension equality of each belt and the tension equality of the reference belt when one reference belt (s-th belt) is selected in all the belts. Tension equality is a value in equivalence with the tension of the belt and means a value corresponding to tension. In a preferred embodiment, the tension spring (TSL) is expressed by the lengths of the two springs of the car end and the machine end. Tension equality (TSL) can be obtained as follows.

Using F = k * x (k is the spring constant, x is the spring increase and decrease length, F is the force), the tension (T _i ) of each belt across the elevator car pulley, counterweight pulley and hoisting sheave is determined by the spring constant and spring length. It is as follows.

T _i = (Ac _0i -Ac _i ) x K _s (Ac) + (Am _0i -Am _i ) x K _s (Am) Equation 3-1

Here, the subscript i means the i th belt of the plurality of belts. T _i is the tension of the i-th belt, Ac _0i is the spring length without the external force of the i-th belt car end spring, Ac _i is the spring length after deformation of the i-th belt car end spring, and Am _0i is The length of the spring without the external force of the i-th belt machine side end spring, Am _i the spring length after deformation of the i-th belt machine side end spring, Ks (Ac) the spring constant of the car-side end spring, Ks (Am) is the spring constant of the machine side end spring. In order to convert the tension Ti into the length dimension, Equation 3-1 is divided by the car end spring constant Ks (Ac) to obtain the following equation.

T _i / Ks (Ac) = Ac _0i -Ac _i + (Am _0i -Am _i ) Ks (Am) / Ks (Ac) Equation 3-2

Summarizing Equation 3-2

_{Ac i + Am i · Ks (} Am) / Ks (Ac) = Ac oi + Am oi · Ks (Am) / Ks (Ac) - T i / Ks (Ac)

In the above equation, TSL _i can be expressed as the following equation indicating the tension equality (TSL).

TSL _i = Ac _i + fac2Am _i Equation 4

fac2 = ks (Am) / ks (Ac) equation 5

According to Equation 4, the tension equivalent of the reference belt (s-th belt) is expressed as Equation 6, and relative TSL _is expressed as Equation 7.

TSL _s = Ac _s + fac2Am _s Equation 6

relative TSL_is = TSL_i -TSL_s   Equation 7

Here, Ac _s is the car side end spring length of the s-th belt which is the reference belt, Am _s is the machine side end spring length of the reference belt, and TSL _s is the tension equality of the reference belt.

In a like manner relative tension equivalent (relative TSL) is a value existing for each of the belts as determined by, the i-th relative tension equivalent of the belt (relative TSL _is) is changed to correspond only to the positional change of the i-th nuts and other belt Does not change the nut position change. That is, it is a value which has an uncoupled relationship with respect to the position change amount (delta Bc) of the nut which means the position change of a nut.

An equation in which the uncoupled relation between the position change amount delta Bc of the nut, which is the first element, and the relative tension equality (relative TSL), which is the second element, is expressed by a matrix.

Equation 8

Here, the Art number _is a coefficient specifying the amount of change in relative TSL _is relative to the position change amount of the nut (delta Bc _i ), and n means the total number of belts.

Equation 8 shows a typical uncoupled relationship, where the right side representing the amount of change in the nut position of each belt is nx 1 and the left side representing the relative tension equality of each belt is also nx 1. have. As this matrix means, the change in the nut position (delta Bc _i ) of the i-th belt on the right side is related only to the relative tension equality of the i-th belt on the left side and not to the relative tension equality of the remaining belts on the left side. .

For example, when the position of the nut 51n of the first belt 31 is changed, only relative TSL _1s of the first belt 31 is changed, and the relative of the remaining belts 32 to 35 is changed. The tension equivalent (relative TSL _2s , relative TSL _4s , or relative TSL _5s ) does not change. In addition, when the position of the nut of the second belt 32 is changed, only the relative TSL _2s of the second belt 32 is changed, and the relative TSL _1s and relative TSL _4s of the remaining belts are changed. , Or relative TSL _5s ) does not change. In addition, even when the position of the nut 54n of the fourth belt 34 is changed, only the relative TSL _4s of the fourth belt 34 is changed and the remaining relative TSL _1s , relative TSL _2s , or relative TSL _5s ) is not affected at all.

Therefore, from Equation 8, the following relation between the positional change amount (delta Bc _i ) of each nut and the relative TSL _is obtained.

relative TSL _is = Art number * delta Bc _i Equation 8-1

delta Bc _i = relative TSL _is / Art numberEquation 8-2

Second course

As can be seen from Equation 8, in order to enable an uncoupled relationship between the nut position change amount delta Bc _i as the first element and the relative TSL _is the second element, the position change amount delta Bc is possible. _i ) A numerical value specifying the amount of change in relative TSL _is relative to _i ) is required. In the present invention, an art number is used as such a characteristic value for deriving an uncoupled relation.

The art number can be constructed in a variety of ways, with the preferred embodiment of the present invention being constructed using the difference in the tension number at each nut position value and the total number of belts, two different nut position values and each nut position value. .

Art Number = delta TSL _k x {1 + 1 / (n-1)} / (Bc _k1 -Bc _k2 ) Equation 9

Here, delta TSL _k nut nut position value (Bc _k2) k second tension equivalent (TSL _k2) and the position of the nut of the belt tension of the k-th belt in (Bc _k1) equivalent when the (TSL _k1) Means the difference between

delta TSL _k = TSL _k2 -TSL _k1 Equation 10

Here, the k-th belt, which the subscript k means, may be any one of a plurality of belts. However, after operating the elevator car a predetermined number of times between the highest position and the lowest position with the nut position values Bc of all belts being the same, the tension equality (TSL _i ) of each belt was measured and compared. It is preferable to select a belt having a tension equality.

In this case, a belt having a moderate tension equality may be determined as an example of a belt having a tension equality closest to the minimum value obtained by finding the maximum value and the minimum value of the tension equality and dividing the difference by 1/2. have.

n means the total number of belts, and Bc _k1 and Bc _k2 mean the first nut position value and the second nut position value of the k-th belt, respectively.

Any value can be selected as the first nut position value Bc _k1 and the second nut position value Bc _k2 , but as an example, the nut is positioned as far as possible from the top of the bolt so that Bc _k is the maximum and It is advisable to position them as close to the top of the bolt as possible for the first and second nut position values when Bc _k is minimum, i.e. when the nut is tightened and loosened as much as possible.

The art number configured as described above may satisfy the uncoupled relationship between the nut position change amount delta Bc _i which is the first element of Equation 8 and the relative TSL _is the second element.

An example of a process of determining the art number will be described with reference to the flowchart of FIG. 4.

Steps 82 to 90 are for selecting the reference belt.

First set the nuts of all belts to have the same nut position value Bc _i (step 82). It is preferable that the nut position value Bc _{i at} this time is about the intermediate value between the maximum allowable nut position value and the minimum allowable nut position value, for example.

In this state, the elevator car is driven a proper number of times between the lowest position and the highest position so that the tension change of the belt according to the position change of the nut is uniformly reflected over the entire length of the belt (step 84). According to the inventor's experiment, it is judged that satisfactory results are obtained even with one drive.

Next, the lengths of the springs Ac _i and Am _i of the car side ends and the machine side ends of all the belts are measured to calculate the tension equality TSL _i of each belt using Equation 4 (steps 86 and 88). ).

Next, by comparing the tension equivalent (TSL _i) values of the respective belt locate the belt having a tension equivalent (TSL _i) the value of the mid-size and selects it as the reference belt (k-th belt).

Here, the determination of the reference belt, for example, may find a belt having the tension equivalent value closest to the value obtained by finding the maximum value and the minimum value of the tension equivalent and dividing the difference by 1/2.

Table 1 below shows the results of the test performed by the applicant for the elevator system installed in the actual building, and shows the measured and calculated values measured at each step of the reference belt selection process.

The maximum possible nut position value in the elevator system under test was 50 mm and the minimum nut position value was 20 mm. The test was carried out by matching the nut position values Bc _i of all the belts to the intermediate value of 35 mm. As a result, the first belt 31 became the reference belt.

Referring back to FIG. 4, step 92 to step 98 are performed by moving the nut of the first belt 31 as a reference belt to have a first nut position value Bc _k1 and calculating a tension equality. to be.

The nut of the reference belt 31 is moved by a predetermined amount, for example, the nut of the reference belt is moved so that the nut position value Bc _k1 becomes the maximum allowable value (step 92).

In this state, the elevator car is secondarily driven between the lowermost position and the uppermost position so that the tension change of the belt according to the position change of the nut can be uniformly reflected over the entire length of the belt. (Step (94))

Next, the lengths of the springs (Ac _k , Am _k ) of the car end and the machine end of the reference belt are measured to calculate the tension equivalent value (TSL _k1 ) of the reference belt (steps 96 and 98).

Step 100 to step 106 is a process of calculating the tension equality of the reference belt by moving the nut of the reference belt to the second nut position value (Bc _k2 ) and then measuring the spring length.

The nut of the reference belt 31 is moved so that the nut of the reference belt 31 is unfixed by a predetermined amount, for example, the nut position value Bc _k2 is the minimum value within the allowable range in which the nut is movable. (Step 100)

In this state, the elevator car is secondarily driven between the lowermost position and the uppermost position so that the tension change of the belt according to the change of position of the nut is uniformly reflected over the entire length of the belt. (Step 102)

Next, the lengths of the springs (Ac _k , Am _k ) of the car end and the machine end of the reference belt are measured to calculate the tension equivalent value (TSL _k2 ) of the reference belt (steps 104 and 106).

The measured values and the calculated values according to the above-described process are shown in Tables 2 and 3, respectively. Table 2 shows when the nut of the reference belt is at the first nut position value (B c _k1 ), and Table 3 shows when the nut of the reference belt is at the second nut position value (Bc _k1 ).

It can be seen that the tension equivalents calculated by setting the nut position values of the first belt 31 serving as the reference belt to the allowable maximum value of 50 mm and the minimum value of 20 mm, respectively, are 269 and 274, respectively.

Finally, the nut position values Bc _k1 and Bc _k2 of the reference belt determined in steps 92 and 100 and the tension equivalence values TSL _k1 and TSL _k2 of the reference belts obtained in steps 98 and 106 are represented by Equation 8 Substitute in to find the art number (step 108).

Substitute the data in Tables 1 through 3 into Equations 9 and 10 to actually calculate the art number.

delta TSL _k = TSL _k2 -TSL _k1 Equation 10

delta TSL _k = 274-269 = 5

Art Number = delta TSL _k x {1 + 1 / (n-1)} / (Bc _k1 -Bc _k2 ) Equation 9

Art Number = 5 x (1 + 1 / (5-1)) / 30 ≒ 0.208

The art number calculated using the data in Tables 1-3 is approximately 0.2.

Third course

When the art number is obtained through the second process, the equation of Equation 8, together with the relative TSL _is obtained for each belt obtained by measurement, is obtained by the nut of each belt necessary for all the belts to have a uniform tension. The position change amount (delta Bc _i ) can be obtained.

The process of obtaining the relative tension equivalent of each belt is demonstrated with reference to FIG.

Step 110 to step 118 is a process for selecting the reference belt. The process of selecting the standard belt is the same as the process of selecting the standard belt in the process of obtaining the art number.

First set the position of the nut such that all the nuts of the belt have the same nut position value Bc _i (step 110). It is preferable that the nut position value Bc _{i at} this time is about the value of the magnitude | size between the allowable maximum nut position value and the minimum nut position value, for example.

Next, the elevator car is driven a proper number of times between the lowest position and the highest position so that the tension change of the belt according to the position change of the nut is uniformly reflected over the entire length of the belt. (Step 112)

Next, the lengths (Ac _i , Am _i ) of the springs of the car side ends and the machine side ends of all the belts are measured and the tension equivalent value TSL _i of each belt is calculated using Equation 4 (steps 114 and 116). ).

Next, the tension equality (TSL _i ) of each belt is compared to find a belt having a medium tension equality (TSL _i ), and the reference belt (marked as the kth belt in the process of obtaining the sth belt and the art number). (Step 118).

The actual test results of the above-described procedure are shown in Table 4.

Referring to Table 4, it can be seen that the tension equal value TSL of the third belt 33 has a value of a medium size, so that it is selected as the reference belt (s-th belt).

Next, a relative TSL _is calculated for each belt, which means the difference between the tension equal value TSL _i of each belt and the tension equal value TSL _s of the third belt that is the reference belt. )

On the other hand, in the belt tension adjustment operation performed after installing the elevator system in a new building, the process of obtaining the art number is preceded, and in this process, the tension equivalence data of each belt is obtained. The relative tension equivalent can be calculated immediately by omitting.

Finally, the relative TSL _is of each belt and the art number obtained in the second step are substituted into Equation 8-2 in the first step, thereby changing the nut position of each belt (correction value) (delta Bc _i ). (Step 122).

Substitute the data in Table 4 into Equations 7 and 8-2 to actually calculate the relative tension equivalence and nut position corrections.

relative TSL_is = TSL_i -TSL_s   Equation 7

delta Bc _i = relative TSL _is / Art number Equation 8-2

Relative tension equality of the first belt 31 is relative TSL _1s = 271-268 = 3

Nut position correction is delta Bc ₁ = 3 / 0.2 = 15

In this manner, the relative tension equivalents and nut position correction values of the remaining second to fifth belts can also be obtained.

Table 5 shows the calculated relative TSL _is and the change in nut position (delta Bc _i ).

Referring to Table 5, the negative nut position change amount delta Bc means that the nut should be moved in the direction in which the nut position value Bc is decreased, that is, in the direction of loosening the nut, and the positive value is in the opposite direction. This means that the nut must be moved.

The position change amount (delta Bc _i ) of each nut calculated as described above, that is, a new nut position value (new Bc _i ) having moved the position of the nut by the correction value, and the spring length and tension equality of the measured car end and machine end Is shown in Table 6.

The new nut position value is obtained by the following equation.

new Bc _i = Bc _i + delta Bc _i Equation 11

As can be seen from Table 6, as a result of applying each nut position change amount (delta Bc) calculated in Table 5 to each nut, it can be seen that the tension equality (TSL) of each belt is almost uniform.

Application example

An example to which the tension control method of the present invention is applied using the data shown in the following Tables 7 to 10 will be described.

The data shown in Table 7 to Table 10 are test data obtained by applying the tension control method of the present invention to the elevator system of Daelim Bangbae 4th apartment. The spring constant Ks (Ac) of the car side end spring of the elevator system of the building is 10.86 kg / mm, and the spring constant Ks (Am) of the machine side end spring is 5.59 kg / mm. The nut position values Bc of the car end nut are 50 mm and 20 mm, respectively.

 Table 7 shows data on the state of the elevator system before applying the method of the invention. In view, the nut position value Bc of each belt is set to be the same, but the difference between the maximum and minimum spring length Ac of the car end is 3.5 mm and the maximum and minimum difference of the spring length Am of the machine end is It is 4.5mm that all springs have different lengths, and as a result, the tension equality (TSL) of each belt also shows a maximum and minimum difference of 5.3.

In order to apply the belt tension adjusting method of the present invention to the elevator system in this state, first, the art number, which is a characteristic value of the elevator system, was obtained. The reference belt was selected as the first belt from the data of the tension equality (TSL) of each belt shown in Table 7.

Next, the tension equal value TSL of the first belt was calculated using the first nut position value Bc _k1 of the nut of the first belt as 50 mm and the second nut position value as 20 mm, respectively. It is shown in 9.

The art number was calculated using Equation 9 to obtain 0.2125.

Art Number = delta TSL _k x {1 + 1 / (n-1)} / (Bc _k1 -Bc _k2 ) Equation 9

delta TSL _k = 274.4-269.3 = 5.1

n = 5, Bc _k1 -Bc _k2 = 30

5.1 x 1.25 / 30 = 0.21

Calculate the relative tension equivalents from the Tension Equivalent (TSL) data in Table 9. When the fourth belt is selected as the reference belt through the comparison between each tension equivalent value (TSL), the relative tension equivalent value (rlative TSL _is ) is calculated as follows.

1st belt: 3

2nd belt: -3.6

Third belt: -2.3

Fifth Belt: 1.5

Substituting the relative TSL _is and the art number obtained by Equation 9 into Equation 8-2, each nut correction value (delta Bc _i ) is obtained as follows.

1st nut: 14.3 mm

2nd nut: -17.1 mm

3rd nut: -10.9 mm

5th nut: 7.1 mm

Table 10 shows the lengths of springs and the calculated tension equivalence data after moving each nut's position by the obtained calibration value of each nut.

As can be seen from the table, although the nut position of each nut is different from each other, it can be seen that the maximum and minimum difference of the tension equality (TSL) is almost constant as 0.8.

According to the tension control method of the present invention, when using five belts as in the embodiment, it is possible to uniformly adjust the overall tension by adjusting the corresponding nut for up to four belts except for the reference belt. When the nut adjustment is required for the four belts as described above, all five belts have different tensions. However, if the tensions of the four belts are almost the same, and the tension of the other belt is different, it is possible to uniformly adjust the tension of the entire belt by performing nut adjustment on only this one belt.

When using the tension adjusting method of the present invention, by minimizing the tension difference between each belt, it is possible to significantly reduce the noise.

In addition, such a tension adjustment method can provide a precise change in the nut position of each belt in a faster time, it is possible to significantly reduce the tension adjustment work time. In addition, the maintenance of the elevator system provides the advantage of being able to finish the work in a shorter time.

Claims (11)

A plurality of belts having a first end having a positionally movable moving pressing piece and a second end having a pressing piece, supporting a load of an elevator system, a first support on which the first ends of the plurality of belts are supported, and A first end portion corresponding to a plurality of belts, the first end portion having a plurality of first springs pressed against the first support by a moving pressing piece of the belt when the load of the system increases; And a second support on which the second ends of the plurality of belts are supported and installed on the second support in correspondence with the plurality of belts, and when the load of the system increases, the second support by the pressing piece of the belt increases. A method for uniformly adjusting tension of a plurality of belts in an elevator system comprising a second end portion having a plurality of second springs pressed against each other. When the position of the moving pressing piece of the selected belt is changed, the corresponding factor of the uncoupled relationship that is changed in the selected belt and does not change in the other belt, and the corresponding factor according to the position change of the moving pressing piece A method of adjusting the belt tension of an elevator system, by using a characteristic value satisfying a coupled relationship, to obtain a position correction value of moving pressure piece of each belt necessary to equalize the tension of all the belts. The belt tension control method according to claim 1, wherein a product of the moving pressure piece position correction value of each belt and the characteristic value is a corresponding factor of each belt, and obtains the moving pressure piece position correction value of each belt. The method of claim 2, wherein the corresponding factor means a difference between the tension equivalent of each belt obtained by converting the tension of each belt into the length dimension and the tension equivalent of the reference belt which is one of the belts selected from the plurality of belts. How to adjust belt tension which is equal to relative tension. The first characteristic value of claim 3, wherein the characteristic value represents a distance from a distal end of the first end of the reference belt to the first position when the moving pressing piece of the reference belt is moved to a first position and a second position. A second position value representing a position value and a distance from the distal end to the second position, and a tension equality of the reference belt when the moving pressing piece is in the first position, and the reference belt of the reference belt when in the second position. Belt tension control method characterized in that it is determined using the difference between the tension equality and the total number of belts. The method of claim 4, wherein the tension equality TSL _i of the i th belt of the plurality of belts is Ac _i , the length of the first spring of the i th belt is Ac _i , the length of the second spring of the i th belt Am _i , and When the spring constant of the first spring is Ks (Ac) and the spring constant of the second spring is Ks (Am), TSL _i = Ac _i + fac2 * Am _i and fac2 = ks (Am) / ks (Ac) is obtained and the relative tension equivalent of the i-th belt of the plurality of belts (relative TSL _is) by using the relationship is to say TSL _s a tension equivalent of the reference belt , relative TSL _is = TSL _i - _is obtained using the relationship of TSL _s , The Art number is the tension value TSL _k2 of the reference belt when the first position value Bc _k1 , the second position value Bc _k2 , and the movement pressing piece is in the second position. When the difference between the tension equivalent value (TSL _k1 ) of the reference belt when the pressing piece is in the first position is delta TSL _k and the total number of belts is n, Art number = delta TSL _k x {1 + 1 / ( n-1)} / (Bc _k1 -Bc _k2 ) using the relationship of the belt tension adjustment method. According to claim 5, wherein the process of obtaining the position correction value of the moving pressing pieces of each belt a) obtaining tension equality of each belt; b) selecting the reference belt using the tension equality; c) obtaining the characteristic value using the reference belt; d) calculating relative tension equivalents using the tension equivalents; And e) calculating the moving pressure piece position correction value of each belt by using the relationship of the moving pressure piece position correction value = the relative tension equality value / characteristic value; Belt tension control method comprising a. The method of claim 6, wherein step a) a) positioning each moving pressing piece such that the moving pressing pieces of all the belts have the same distance from the distal end of the first end; b) driving the elevator car a suitable number of times between the lowest and highest positions; c) measuring the length of said first and second springs of all belts; And d) calculating the tension equality of each belt Belt tension control method comprising a. 7. The belt tension adjusting method according to claim 6, wherein the step b) selects a belt having an intermediate tension equivalent value as the reference belt by comparing the tension equivalent values of the respective belts. The method of claim 6, wherein step c) a) moving the moving pressing piece of the reference belt to a first position; b) driving the elevator car a suitable number of times between the lowest and highest positions; c) calculating the tension equality of each belt by measuring the lengths of the first and second springs of the reference belt; d) moving the moving pressing piece of the reference belt to a second position; e) driving the elevator car a suitable number of times between the lowest and highest positions; f) calculating the tension equality of each belt by measuring the lengths of the first and second springs of the reference belt; And g) calculating the characteristic value Belt tension control method comprising a. 10. The method of claim 9, wherein the first and second positions of the moving pressing piece are respectively positioned as far as possible and as close as possible from the end of the first end within the movable range of the moving pressing piece. How to adjust the belt tension. The belt tension adjusting method according to claim 1, wherein the first and second ends are respectively connected to a rod having a male screw portion, and the moving pressing piece is a nut coupled to the male screw portion.

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