KR100375067B1 - Vibration reduction device for passenger conveyor - Google Patents

Abstract

The present invention relates to a vibration reduction device for a passenger transport device, the present invention is a guide member fixed to the moving scaffold fixed to be substantially parallel to the traveling direction of the moving scaffold traveling in endless track, and the moving scaffold running in infinite track Mass member moving in the vibrating direction of the moving scaffold so as to slide into the guide member so as to cancel the bite frequency component generated when the scaffold chain restrains the front wheels of each moving scaffold and the sprockets that drive it. And an elastic member elastically supported on both sides of the mass member and having the predetermined spring constant such that the mass member has a constant frequency, such that the bite frequency of the drive terminal gear and the natural frequency of the driven terminal gear are the same or similar. However, excessive vibration amplification due to resonance is prevented and other system dynamics Even if an excitation circle is generated due to its characteristics, it actively responds to it, so that passengers always feel comfortable without frequent maintenance.

In addition, since the factory estimates and adjusts the vibration level through simulation in advance, it is shipped as mounted on the moving scaffold, so that adjustment work in the field can be omitted, thereby enabling quick and accurate installation work.

Description

VIBRATION REDUCTION DEVICE FOR PASSENGER CONVEYOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vibration reduction device for passenger transport equipment such as escalators or moving walks, and more particularly to passenger traffic that can efficiently reduce vibration of an excitation frequency, which is a bite frequency of a drive terminal gear installed in an escalator or a moving walkway. It relates to a vibration reduction device of the equipment.

In general, an escalator or moving walkway is installed at a relatively low moving height such as a subway station or a department store to transfer many passengers or goods to a target floor at a time. FIG. 1 is a perspective view showing a conventional escalator.

As shown in the drawing, a conventional escalator includes a driving unit for generating a driving force necessary for transporting a passenger to a target floor, a moving scaffolding unit circulating a predetermined track by the driving unit so that the occupant stands up and is transported, and the moving scaffolding unit It is composed of a moving handle portion circulating a predetermined track with the same direction and the same speed as the moving scaffold by the drive unit to serve as a handle of the climber.

The drive unit includes a drive motor 1 as a drive source, a speed reducer 2 for adjusting the rotational speed of the drive motor 1, a drive terminal gear 3 restrained by the speed reducer 2 and disposed on an upper layer, It comprises a driven terminal gear (5) connected to the drive terminal gear (3) by the track plate of the endless track 4 arranged on the lower floor.

The drive terminal gear 3 and the driven terminal gear 5 are provided with a driving sprocket 3A and a driven sprocket 5A, each of which is a winding point of the step chain 4, are integrally provided, and the step chain 4 ), The front wheel roller (not shown) provided on the front side of each moving scaffold (S) is fastened.

In the drawings, reference numeral F denotes a machine room and H denotes a moving handle.

The operation of the conventional escalator as described above is as follows.

That is, the driving force generated by the drive motor 1 is transmitted to both drive terminal gears 3 through the reduction gear 2 to rotate, and at the same time, the drive sprocket 3A provided in each drive terminal gear 3. ) And the scaffold chain 4 wound in an endless track on the driven sprocket 5A provided in the driven terminal gear 5 while traveling upward or downward in accordance with the rotational direction of the drive terminal gear 3, respectively. By moving (S) upward or downward, the passengers on the scaffold (S) are moved between floors.

At this time, the scaffolding front wheel roller (not shown) travels along the scaffolding chain 4 and engages with the outer ring of the drive terminal gear 3 to change the angular velocity corresponding to the pitch of the scaffolding chain 4 so that each movement occurs. When the footrest (S) is vibrated in the front and rear direction, this vibration is a frequency band between 3 ~ 10Hz which is most sensitive when the person is standing, as shown in Figure 3 when such vibrations occur discomfort and anxiety when riding It is triggered.

In view of this, in the related art, as shown in FIG. 2, a tension control device 6 for adjusting the tension of the scaffold chain S is mounted on the driven terminal gear 5 side.

The tension adjusting device (6) is a tension adjuster (6A) coupled to the driven terminal gear (5), and one end is coupled to the tension adjuster (6A) at the same time fixed frame disposed on the outer side of the scaffold chain (S) It consists of a support spring (6B) to be coupled.

In the conventional tension adjusting device 6, when the vibration of the escalator is more than an appropriate value, the operator directly enters the machine room F and pulls or pushes the tension adjuster 6A through the support spring 6B as described above. By controlling the tension of the) was to minimize the vibration of each moving scaffold (S).

However, in the tension control device of the conventional escalator as described above, in order to secure the optimum tension condition, the operator must enter the machine room (F) every time and adjust the tension control device (6). In addition, even if the optimum tension condition is secured even after a certain period of time, the above-mentioned scaffold chain 4 is stretched and sagging, which causes a problem that the vibration is repeatedly increased.

In addition, because the entire escalator is shipped without fully assembled, it is impossible to evaluate the vibration level at the assembly stage. Therefore, the vibration control device must be adjusted after installation on the lead wire. Because of the different dynamic characteristics, there was also a problem in that the tension was adjusted differently according to each characteristic.

The present invention has been made in view of the problems of the conventional tension control device of the escalator, it is an object of the present invention to provide an apparatus for reducing vibration of the escalator that can actively respond to the variable conditions.

In addition, an object of the present invention is to provide a vibration reduction device of the escalator that is assembled in advance in the factory can be omitted in the field adjustment work.

1 is a partial cutaway perspective view showing a conventional escalator.

Figure 2 is a perspective view schematically showing a tension control device of the scaffold chain in a conventional escalator.

Figure 3 is a graph showing the comparison of the sensitivity of the vibration to the human body.

4 is a schematic view showing a state in which the vibration reduction device of the present invention is mounted on an escalator.

Figure 5 is a longitudinal sectional view showing a vibration reducing device of the present invention.

Figure 6 is a perspective view showing each member for mounting the vibration reduction device of the present invention on an escalator.

Figure 7 is a graph showing the vibration mode of the escalator equipped with the vibration reduction device of the present invention.

** Description of symbols for the main parts of the drawing **

10: guide member 20: mass member

21: mass 21a: sliding hole

21b: Spring loaded groove 22: Ball bearing

22a: Outer Bearing 22b: Inner Bearing

23: snap ring 31, 32: first and second spring (elastic member)

In order to achieve the object of the present invention, the guide member is fixed to a specific moving scaffolding to connect a plurality of moving scaffolding in the endless track and is substantially parallel to the traveling direction of the moving scaffolding, so as to drive the moving scaffolding in the endless track A mass member which is slidably inserted into the guide member so as to cancel the bite frequency component generated when the foot chain is restrained from the front wheel of each moving scaffold and the sprocket driven by driving it, and moves in the vibration direction of the moving scaffold; There is provided an apparatus for reducing vibration of an escalator that is elastically supported on both sides of the mass member and is made of an elastic member having a predetermined spring constant such that the mass member has a constant frequency.

Hereinafter, the vibration reduction apparatus of the escalator according to the present invention will be described in detail based on the embodiment shown in the accompanying drawings. However, since the general configuration of the escalator provided with the vibration reduction device of the present invention is the same as in the prior art, a basic description of the escalator will be omitted.

4 is a schematic view showing a state in which the vibration reduction device of the present invention is mounted on an escalator, FIG. 5 is a longitudinal sectional view showing the vibration reduction device of the present invention, and FIG. 6 shows each member for mounting the vibration reduction device of the present invention to an escalator. 7 is a perspective view illustrating a vibration mode of an escalator equipped with the vibration reduction device of the present invention.

As shown therein, the vibration reduction apparatus of the escalator according to the present invention connects a plurality of moving scaffolds S in series so as to travel in an infinite track, and among them, a specific moving scaffold (more precisely, four moving scaffolds at regular intervals). A guide member 10 fixed to the lower side of the moving scaffold S so as to be substantially parallel to the traveling direction of the moving scaffold S, and the sliding scaffold is inserted into the guide member 10 to (S). The elastic member 31 which is elastically supported on both sides of the mass member 20 moving in the vibration direction of S and the mass member 20 has a predetermined spring constant such that the mass member 20 has a constant frequency. 32).

The guide member 10 is formed in an elongated rod shape and the front end is welded to the fixed member 40 which is rotatably coupled about the front wheel shaft C to the front wheel shaft C of the moving scaffold S. On the other hand, the rear end is integrally coupled to the support member 50 fixed to the rear wheel side of the moving scaffold (S).

In addition, the guide member 10 is mounted to have an inclination of approximately 30 degrees based on the footrest surface of the movable footrest S as a whole, and the front wheel end is more than the rear wheel end so that the feeling of mass of the mass member 20 is improved. It is desirable to be fixed to have a further inclination of about 10 degrees.

The fixing member 40 has a plurality of fixing pieces (41, 41) formed to be recessed to have the same curvature as the curvature of the front wheel shaft (C) of the moving scaffolding (S), and the fixing pieces (41, 41) of the front wheel With several fastening members 42 for winding the shaft C on both sides and the sliding bush 43 interposed between the inner circumferential surface of the recessed portions of the fixing pieces 41 and 41 and the outer circumferential surface of the front wheel shaft C. Is done. The first spring sheet 61 to be described later is welded to the outer surface of the inner fixing piece 41 among the fixing pieces 41 and 41.

The support member 50 is bolted to the 'blade' shaped hanger supports 51 and 51 coupled to extend downward from both bottom surfaces of the rear wheel side of the movable footrest S, and the hanger supports 51 and 51 with bolts. And the other end of the guide member 10 is composed of a "iron (凸)" type hanger 52.

In the center of the hanger 52 is formed a through hole 52a through which the rear wheel side end of the guide member 10 is coupled.

The mass member 20 is provided to have a weight equal to or equal to the weight of the moving scaffold S or within ± 30%, and both ends of the mass members 20 are coupled to the elastic members 31 and 32, respectively, to guide the members 10. Between a normal mass 21 having a sliding hole 21a through which the guide member 10 penetrates, and a sliding hole 21a of the mass body 21 and an outer peripheral surface of the corresponding guide member 10. It is made of a ball bearing 22 is installed in the guide to guide the mass 21 to slide smoothly.

Spring mounting grooves 21b and 21b, into which the elastic members 31 and 32 are press-fitted, are formed in a circular shape at the centers of both end side surfaces of the mass 21 to accommodate the sliding holes 21a.

The ball bearing 22 is a cylindrical outer bearing 22a interposed between both snap rings 23 and 23 pressed into the sliding hole 21a of the mass body 21 and slidably restricted by the snap rings 23 and 23. And a plurality of bearings provided in sliding contact with the inner circumferential surface of the outer bearing 22a, while the guide member 10 includes an inner bearing 22b in which the guide member 10 slides.

The elastic members 31 and 32 are compression coil springs (for convenience, the first spring being coupled to the front wheel side, referred to as the second spring), and each inner end thereof is a spring-loaded groove of the mass 21 described above. It is inserted into and coupled to (21b, 21b), respectively, the outer end of the inner surface of the first spring sheet 61 welded to the outer surface of the inner fixing piece 41 and the other of the guide member 10. It is coupled to the inner surface of the second spring sheet 62 supported at the side end.

Spring mounting protrusions 61a and 62a to which respective springs 31 and 32 are inserted are formed on the inner surfaces of the first spring sheet 61 and the second spring sheet 62, respectively. The mounting protrusions 61a and 62a are preferably formed to be inclined at about 10 ° in cross-section projection as the diameter decreases toward the outside in consideration of the compression of each spring 31 and 32.

In the drawings, the same reference numerals are given to the same parts as in the prior art.

Reference numeral 63 in the figure denotes a second spring seat support nut.

The vibration reduction device of the escalator according to the present invention as described above is assembled as follows.

First, the first spring sheet 61 is welded to the outer surface of the fixing piece 41, and one end of the guide member 10 is fastened to the first spring sheet 61, and at the same time, the guide member 10. The first spring 31 is inserted into the first spring 31, and the outer end of the first spring 31 is pressed into the spring mounting protrusion 61a of the first spring seat 61, and then the inner end of the first spring 31 is pressed. The mass member 20 is inserted into the guide member 10 so as to be inserted into the front wheel side spring mounting groove 21b of the mass body 21. At this time, the mass member 20 first attaches one side snap ring 23 to one ring groove (unsigned) of the sliding hole 21a provided in the center of the mass body 21, and then inserts a ball bearing 22. Then, the other side snap ring 23 is inserted into the other ring groove (unsigned) to prevent the ball bearing 22 from being separated. The mass member 20 is preferably completed before assembly of the vibration reduction device.

Next, the inner end of the second spring 32 is press-fitted into the spring mounting groove 21b provided on the rear wheel side of the mass body 21, and the second spring sheet is in close contact with the outer end of the second spring 32. (62) is fastened to the other end of the guide member 10, and then tightening the support nut 63 on the outer surface of the second spring sheet 62 to secure the engagement of the elastic members (31, 32).

Next, a holder 52 coupled to the holder supports 51 and 51 and the holder supports 51 and 51 fixed in advance on the rear wheel side of the movable foot S in order to mount the vibration reduction device on the movable foot S. After supporting the other end of the guide member 10 in the through hole 52a of the above), the one side fixing piece 41 is moved to the front wheel shaft C while the sliding bush 43 is interposed therebetween. The fixing pieces 41 and 41 are integrally combined with the fastening member 42 while the remaining fixing pieces 41 are placed on the opposite side of the front wheel shaft C to the front wheel shaft C of the above. This completes the assembly of the vibration reduction device.

On the other hand, the vibration reduction device of the escalator of the present invention has the following effects.

That is, the vibration reduction device mounted on the movable scaffolding (S) is the scaffolding chain (shown in Figure 1) when the moving to the excitation frequency of the bite frequency, the mass body 21 is moved to the scaffolding frequency of the bite frequency while the scaffolding chain The vibration energy of (4) is absorbed, thereby vibrating according to the excitation frequency, which is the bite frequency of the driving terminal gear (shown in FIG. 1), and thus affecting the scaffold chain 4 again. When the vibration in the moving scaffold S is amplified, for example, there are 60 moving scaffolds, four vibration reducers, and one of the vibration reducers operates. As shown in the figure, it can be seen that the vibration value of excessive initial vibration generated by resonance can be significantly reduced.

Vibration reduction device of the passenger transport apparatus according to the present invention, to reduce the bite frequency component generated when the mating of the scaffold chain coupled to restrain the plurality of moving scaffolding and the driving terminal gear that bites the scaffold chain and travels in an infinite track By constructing the moving scaffold with the above-described moving scaffold, excessive vibration amplification due to resonance is prevented even if the bite frequency of the driving terminal gear and the natural frequency of the driven terminal gear are the same or similar, and the dynamic characteristics of other systems are prevented. Even if an excitation is generated, the passengers will actively respond to this, and passengers will always feel comfortable without frequent maintenance.

In addition, since the factory estimates and adjusts the vibration level through simulation in advance, it is shipped as mounted on the moving scaffold, so that adjustment work in the field can be omitted, thereby enabling quick and accurate installation work.

Claims (5)

A guide member connected to a plurality of moving scaffoldings in an endless track and fixedly installed to a specific moving scaffold so as to be substantially parallel to the traveling direction of the moving scaffolding; A mass member that is slidably inserted into the scaffold chain that restrains the front wheels of the movable scaffold and the guide member so as to travel the movable scaffold in an infinite track, and moves in the vibration direction of the scaffold; An apparatus for reducing vibration of an escalator, which is elastically supported on both sides of the mass member and is made of an elastic member having a predetermined spring constant such that the mass member has a constant frequency. 2. The guide member according to claim 1, wherein the guide member is fixed to a fixing member rotatably coupled to the front wheel shaft of the moving scaffold whose one end is constrained to the scaffolding chain, while the other end thereof is fixed to the supporting member fixed to the rear wheel side of the moving scaffold. Vibration reduction device of the escalator, characterized in that. The vibration reduction apparatus of the escalator according to claim 2, wherein a sliding bush is mounted between the inner circumferential surface of the fixing member and the outer circumferential surface of the front wheel shaft corresponding thereto to smoothly rotate the fixing member. 2. The mass member of claim 1, wherein the mass member has a sliding hole through which the guide member penetrates at the center thereof, and a mass body having the elastic member mounted thereon at both ends thereof, and between the sliding hole of the mass body and the outer peripheral surface of the guide member. The vibration reduction device of the escalator, characterized in that the ball bearing for smoothing the sliding motion of the mass body is retrofitted. The vibration reduction apparatus of the escalator according to claim 4, wherein the weight of the mass member is formed within a range of ± 30% of the weight of the moving scaffold.