KR20010053897A - Vibration reducing divice for passenger conveyor system - Google Patents

Abstract

PURPOSE: A device for reducing the vibration of passenger transportation is provided to efficiently reduce the vibration of an exciting frequency as an engaging frequency of an upper driven terminal gear installed on passenger transportation such as an escalator. CONSTITUTION: A dynamic vibration reducer(4) is installed on a step(12) of an escalator for reducing the vibration of an engaging frequency of an upper driven terminal gear. Herein, the dynamic vibration reducer is formed with a U-shaped fixing part combined to a rib(12a) of the step; a T-shaped elastic part connected to the fixing part; and mass parts combined to elongated holes at both ends of the elastic part by bolts and nuts. Herein, the elongated holes move the mass parts left and right for adjusting a natural frequency. Moreover, the weights of mass bodies composed of the mass parts are same. Before fixing the mass parts, the mass parts are adjusted to have the same natural frequency to the engaging frequency of the upper driven terminal gear.

Description

VIBRATION REDUCING DIVICE FOR PASSENGER CONVEYOR SYSTEM}

The present invention relates to a vibration reduction device for passenger transport equipment, and more particularly, to efficiently reduce the vibration of an excitation frequency, which is a bite frequency of an upper drive terminal gear installed in a passenger transport device such as an escalator.

In general, passenger transportation equipment such as escalators and moving walkways are installed in medium and large buildings with frequent human access, such as subways, department stores, and officetels. An escalator is shown in FIGS. 1 and 2, which is briefly described as follows.

As shown in the drawing, a conventional escalator is configured to drive a handrail 14 moving along a predetermined trajectory, a step 12 for boarding and transporting a passenger, and driving the hand rail 14 and step 12. The machine room 15 is comprised large.

The machine room 15 includes a motor 16, a reducer 17, a drive chain 18, a drive sprocket, an upper drive terminal gear 3, a driven terminal gear 1a, a drive shaft and a terminal rail. It consists of a driving unit coupled to the step, the step 12, the step chain 11, the step front wheel roller 19 and the step rear wheel roller and the like moving unit organically coupled to each other.

Therefore, when power is generated by the driving of the motor 16 mounted in the machine room 15 during the operation of the escalator, the power is transmitted to the reducer 17 directly connected to the motor 16, to the reducer 17 The drive sprocket is rotated by transmitting power to the drive chain 18 by the coupled sprocket, and the step 12 is coupled to the upper drive terminal gear 3 coupled to the same axis as the drive sprocket. The step chain 11 is moved, and the step 12 moves up and down along the upper driving terminal gear 3 and the driven terminal gear 1a. Or, it moves to the lower floor.

At this time, the step front wheel roller 19 of the step 12 is rotated along the outer ring of the driven terminal gear (1a), and to make the driven terminal gear (1a) with the bite frequency component of the upper drive terminal gear (3) As a result, the driven terminal gear 1a has a problem of synchronizing with the bite frequency component. As a result, the secondary vibration is generated from the driven terminal gear 1a and transmitted to the step front wheel roller 19. Vibration problem affects 11).

In order to solve this problem, in the same manner as the transmission rate reduction method shown in Fig. 4, the driven terminal gear 1a has a natural frequency that does not match the bite frequency component of the upper drive terminal gear 3 as much as possible. The method of minimizing this is mainly used.

On the other hand, the step front wheel roller 19 is coupled to the upper drive terminal gear (3) while the step (12) installed on the rails in accordance with the change in the angular speed by the pitch of the step chain 11, the vibration in the front and rear directions While the vibration, such as shown in Figure 3, when the vibration occurs in the frequency band between 3 ~ 10㎐ which is felt the most unpleasant when a person standing, causing such a great discomfort and anxiety when riding In order to alleviate such vibration, the vibration of the step 12 is minimized by adjusting the spring 20 connected to the driven terminal gear 1a to apply the tension of the step chain 11, as shown in FIG. The method is mainly used.

As described above, in order to reduce the transmission rate, a method of minimizing the transmission rate has been mainly used so that the driven terminal gear 1a has a natural frequency that does not coincide with the bite frequency component of the upper drive terminal gear 3. Is very time consuming to adjust, and even if well adjusted, the stiffness of the spring 20 changes due to the increase of the step chain 11 after a certain time elapses, and the vibration increases again, and the entire escalator is completely Since it is impossible to evaluate in the unassembled state, it has to be finally adjusted after being installed on the lead wire, and there are many problems such that there is always a repeatability that must be adjusted manually because the characteristics vary depending on the height and length of the escalator.

Accordingly, the present invention is to solve the above problems, vibration reduction device of the passenger transport equipment that can effectively reduce the vibration of the excitation frequency that is the bite frequency of the upper drive terminal gear installed in the passenger transport device such as escalator In providing

1 is a perspective view showing a conventional escalator.

Figure 2 is a perspective view showing a state in which the conventional driven terminal gear is installed.

Figure 3 is a graph comparing the sensitivity of the vibration of each human body.

4 is a graph showing a comparison of the transmission rates under resonance and other conditions.

Figure 5 is a side view showing a state in which the vibration reduction device of the present invention passenger transport equipment is installed.

Figure 6 is a perspective view showing the structure of a copper reducer which is a main component of the present invention.

Explanation of symbols on the main parts of the drawings

1a: driven terminal gear 3: drive terminal gear

4: copper reducer 5: fixing part

7 elastic part 10 mass part

11: Step Chain 12: Step

12a: rib

An escalator comprising a drive terminal gear for driving a step chain in which a passenger boarding step is coupled, and a driven terminal gear installed at a predetermined distance from the drive terminal gear, wherein the step is engaged with the upper drive terminal gear. Provided is a vibration reducing device for a passenger transport equipment, characterized in that it is equipped with a copper reducer for reducing vibration of a frequency-induced frequency.

Hereinafter, with reference to the embodiment of the accompanying drawings, the vibration reducing device of the present invention passenger transport equipment configured as described above in more detail.

Figure 5 is a side view showing a state in which the vibration reduction device of the present invention passenger transport equipment is installed, Figure 6 is a perspective view showing the structure of the copper reducer of the main component of the present invention, the same reference numerals are given to the same parts as in the prior art The present invention will be described.

The present invention is equipped with a dynamic reducer (4) for reducing the vibration of the excitation frequency, which is the bite frequency of the upper drive terminal gear (3), installed in a passenger transport apparatus such as an escalator.

The copper reducer 4 is connected to the fixing part 5 and the elastic part of the "c" shaped fixing part 5 which is fastened to the rib 12a of the step 12 by a fastening member such as a bolt. And a mass portion 10 fastened by a bolt 8 and a nut 9 to the long holes 7a respectively formed at both ends of the elastic portion 7. It is.

In addition, the long hole 7a formed at both ends of the elastic part 7 of the copper reducer 4 may move the mass part 10 to the left and right to adjust the inherent vacuum number, and may support the mass part 10. In order to have a natural frequency of up to 20Hz to at least 2Hz to have a thickness and width, the mass portion 10 is composed of two masses and the weights of the masses are the same.

In addition, the mass part 10 moves the mass part 10 fastened to the long hole 7a to the left and right to have the same natural frequency as that of the bite frequency component generated by the upper driving terminal gear 3. After adjusting to have a natural frequency, it is finally fixed by bolting.

At this time, it is preferable that the distances of the two mass parts 10 are equally adjusted so as not to have different natural frequencies.

As described above, the dynamic reducer 4 installed in the step 12 vibrates according to the excitation frequency, which is the biting frequency of the upper driving terminal gear 3, thus affecting the step chain 11 again. It is possible to reduce the phenomenon that the vibration in (12) is amplified.

As described in detail above, the vibration reduction device of the passenger transport equipment of the present invention has the effect of reducing the vibration of the excitation frequency, which is the bite frequency of the upper drive terminal gear, by installing a dynamic reducer at the step of the escalator, and also the driven terminal gear. Even if the spring installed in the well is well adjusted, there is an effect that absorbs and removes the last generated vibration.

Claims (2)

An escalator comprising a drive terminal gear for driving a step chain in which a passenger boarding step is coupled, and a driven terminal gear installed at a predetermined distance from the drive terminal gear, wherein the step is engaged with the upper drive terminal gear. Vibration reduction device for passenger transport equipment, characterized in that equipped with a copper reducer for reducing the vibration of the excitation frequency, which is a frequency. The method of claim 1, wherein the copper reducer is a fixed portion fixed to the rib of the step, an elastic portion made of an elastic plate to be connected to the fixed portion and to absorb vibration, and a mass portion provided at the end of the elastic portion Vibration reduction device of the passenger transport equipment, characterized in that configured.