CN115402905A

CN115402905A - Balance chain for elevator

Info

Publication number: CN115402905A
Application number: CN202110931753.4A
Authority: CN
Inventors: 山田智己
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2021-05-27
Filing date: 2021-08-13
Publication date: 2022-11-29
Anticipated expiration: 2041-08-13
Also published as: JP2022181767A; JP7031781B1; CN115402905B

Abstract

The invention provides a balance chain for an elevator, which can reduce the diameter during bending and save space by inhibiting the increase of the bending radius in a balance chain (5) for reducing vibration and noise generated by the contact of links (6 a, 6 b) of a metal chain (6). Flexible ropes (8, 9) are spirally wound around a metal chain (6) constituting an elevator balance chain connecting a car and a counterweight provided at a position facing the car.

Description

Balance chain for elevator

Technical Field

The present invention relates to a balance chain for an elevator, which is composed of a metal chain connecting a car and a counterweight.

Background

In a conventional balancing chain for an elevator, a coating layer of a synthetic resin is provided on a metal chain body in order to prevent noise generated by vibration of links of a metal chain constituting the balancing chain by a simple process. The coating layer is formed by spraying a synthetic resin on the metal chain or by impregnating the metal chain with the synthetic resin (see, for example, patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 11-287299

Disclosure of Invention

Problems to be solved by the invention

In the conventional elevator balance chain, the synthetic resin coating layer integrally covers the metal chain main body, not the individual links. When the balancing chain is to be bent in order to bind or store the chain, the tension of the coating layer acts, and therefore, the bending radius is increased as compared with a balancing chain not coated with a synthetic resin, and the chain is difficult to be bent. Therefore, it is necessary to increase the diameter of the chain when the chain is bent, and accordingly, there is a problem that space saving is difficult, for example, a large storage space is required.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a balance chain for an elevator, which can reduce vibration and noise generated by contact between links constituting a metal chain, and which can reduce a diameter when bent.

Means for solving the problems

The balance chain for the elevator of the present invention is composed of a metal chain connecting a car and a counterweight provided at a position facing the car, and includes the metal chain in which a flexible rope is spirally wound.

Effects of the invention

The elevator balance chain of the invention is provided with a metal chain wound with a flexible rope, thereby reducing vibration and noise caused by mutual contact of chain links of the metal chain, and inhibiting increase of bending radius, so that the diameter during bending can be reduced, and space can be saved.

Drawings

Fig. 1 is a side view of an elevator using an elevator balance chain according to embodiment 1.

Fig. 2 is a front view of an elevator balance chain according to embodiment 1.

Fig. 3 is a side view of an elevator balance chain according to embodiment 1.

Fig. 4 is a sectional view of the link in embodiment 1.

Fig. 5 is a state diagram of the resin belt used in embodiment 1 when it is applied.

Fig. 6 is a front view of an elevator balance chain according to embodiment 2.

Fig. 7 is a side view of an elevator balance chain in embodiment 2.

Description of the reference symbols

3: a counterweight; 4: a car; 5: a balancing chain; 6: a metal chain; 6a: a chain link; 6b: a chain link; 7a: an inner periphery of the link; 7b: the outer periphery of the chain link; 8: 1 st resin tape; 9: a 2 nd resin tape; 10: a 1 st rope; 11: the 2 nd rope.

Detailed Description

Embodiment mode 1

Hereinafter, the elevator balance chain of embodiment 1 will be described in detail. In the drawings, the same reference numerals denote the same or equivalent structures. In the elevator shown in fig. 1, a hoisting pulley 1 rotationally driven by a hoisting machine is provided, and a hoisting rope 2 is hung on the hoisting pulley 1 so as to hang down. A counterweight 3 is connected to one end of the hoisting rope 2, and a car 4 is connected to the other end. The counterweight 3 is disposed at a position facing the car 4.

As shown in fig. 2 to 5, the balance chain 5 is composed of a metal chain 6 and two

resin belts

8 and 9 as flexible ropes, and the counterweight 3 is connected to one end thereof and the car 4 is connected to the other end thereof. The resin used for these

belts

8, 9 is, for example, a synthetic resin. The cross-sectional shape is rectangular. The metal chain 6 is constituted by a plurality of endless links 6a, 6b, and inner peripheries 7a of the links are connected to each other in contact so that the links 6b are positioned at a position perpendicular to the links 6 a. The 1 st resin belt 8 and the 2 nd resin belt 9 are spirally wound around the surface of the metal chain 6 so as to be in contact with the outer periphery 7b of the link. Here, the outer periphery 7b of the link is a surface including the longest circumference when the link 6a shown in fig. 2 is viewed from the front and when the link 6b shown in fig. 3 is viewed from the side. Fig. 4 is a cross-sectional view of 1 link 6a, 6 b. The outer periphery 7b of the link is the portion indicated by the arrow on the arc of fig. 4.

A mechanism for reducing the bending radius of the balance chain 5 configured in this manner will be described. In the conventional counter chain, since the synthetic resin coating layer integrally covers the metal chain main body instead of covering each link, the tension of the coating layer acts in a direction in which the counter chain is horizontally stretched with respect to the axis thereof when the counter chain is intended to be bent. Therefore, the movable region of each link is restricted, and the bending radius of the balance chain becomes large. On the other hand, in the balance chain 5 of the present invention, the surface of the metal chain 6 is not bonded to the

resin belts

8 and 9. Therefore, when the balance chain 5 is to be bent, the links 6a and 6b slide on the

resin belts

8 and 9 and rotate, and the bending radius of the balance chain 5 becomes small.

Next, the operation of the 1 st resin belt 8 and the 2 nd resin belt 9 in the balance chain 5 configured as described above will be described with reference to fig. 5. The

resin belts

8 and 9 are spirally wound around the surface of the metal chain 6, whereby a force F is applied to the link 6 b. The force F is a resultant force applied in the horizontal direction and the vertical direction with respect to the axis of the metal chain. Therefore, the force F suppresses the link 6b from moving in the horizontal direction and the vertical direction with respect to the axis of the metal chain 6. Thereby, the inner peripheries 7a of the links are difficult to separate from each other, and even if the inner peripheries 7a of the links are separated from each other, vibration and noise caused by the links 6a and 6b coming into contact again can be reduced. Further, by sandwiching the link 6b between the two

belts

8 and 9, even if the link 6b vibrates due to its movement, the vibration can be suppressed, and moreover, since the

belts

8 and 9 absorb the vibration energy of the link 6b, the noise can be reduced.

In this case, in order to apply the force F symmetrically to the left and right of the

resin belts

8 and 9 to the link 6b, it is preferable to wind the 1 st resin belt 8 to the right and the 2 nd resin belt 9 to the left in a spiral shape around the metal chain 6, that is, to wind the two

belts

8 and 9 alternately.

In the balance chain 5 in which the 1 st resin belt 8 and the 2 nd resin belt 9 are spirally wound around the metal chain 6 in this manner, the

resin belts

8 and 9 are sandwiched between the link 6a and the adjacent link 6a and between the link 6b and the adjacent link 6 b. Thereby, contact of the links 6a with each other and contact of the links 6b with each other are prevented, and therefore vibration and noise caused by the contact of the links 6a, 6b can be reduced. In this case, in order to prevent the links 6a and 6b from contacting each other without leakage, it is preferable that the 1 st resin belt 8 and the 2 nd resin belt 9 cross each other on all the links 6 a.

In the balance chain 5 in which the 1 st resin belt 8 and the 2 nd resin belt 9 are spirally wound around the metal chain 6 in this manner, the increase in the bending radius is suppressed and the balance chain is easily bent, and therefore, when the balance chain 5 is installed in an elevator, the suspension interval W between the car 4 and the counterweight 3 can be shortened. In addition, when the counter chain 5 is stored, the counter chain can be stored in a space-saving manner.

When the width of the

resin belts

8 and 9 is such that the width can pass right between the links 6a, the contact between the links 6a and the contact between the links 6b can be prevented more effectively, and thus, the vibration and noise can be reduced. Further, the

resin belts

8 and 9 are wound around the metal chain 6 so as not to penetrate through the holes of the links 6a and 6b, which can reduce the time and effort required to pass through the holes of the links 6a and 6b, and contribute to improvement in productivity of the balance chain 5.

Further, although the case where the metal chain 6 is configured by the plurality of endless links 6a and 6b has been described, a metal roller chain configured so that two plates are located at opposite positions and the plates are connected to each other in parallel may be used.

Embodiment mode 2

The elevator balance chain according to embodiment 2 will be described in detail with reference to fig. 6 and 7. In the elevator balance chain according to embodiment 1,

resin belts

8 and 9 are wound around the metal chain 6. In contrast, in embodiment 2, instead of winding the

resin tapes

8 and 9, a wire formed by twisting a plurality of linear members or wires 10 and 11 having a circular cross section is wound around the metal chain 6 to form the balance chain 5.

In the elevator balance chain configured as described above, the 1 st and 2 nd ropes 10 and 11 act on the links 6b, similarly to the elevator balance chain described in embodiment 1, and therefore even if the inner peripheries 7a of the links are separated from each other, vibration and noise caused by the links 6a and 6b coming into contact again can be reduced. Further, since the ropes 10 and 11 suppress vibration of the links 6a and 6b and absorb vibration energy, vibration and noise of the elevator balance chain can be reduced.

When the ropes 10 and 11 are used, the area in contact with the links 6a and 6b is smaller than that of the

belts

8 and 9, and therefore, the frictional force generated between the ropes and the links 6a and 6b is reduced. Therefore, when the balance chain 5 is bent, the links 6a and 6b easily slide on the ropes 10 and 11 and rotate, and thus the bending radius of the balance chain 5 becomes smaller.

In

embodiment

1 or 2, the example using the

belts

8 and 9 or the ropes 10 and 11 has been described, but the ropes are not limited to these examples, and any long and thin ropes that can be wound or wound around the metal chain 6 may be used. Specifically, the cross-sectional shape of the elongated string-shaped resin is not limited to a rectangle or a circle, and may be any shape such as a polygon such as a triangle, or a hollow tubular shape.

The cord is not limited to synthetic resin as long as it is flexible and can have a small bending radius, and any material such as natural resin or fiber such as hemp may be used.

Claims

1. A balance chain for an elevator, which is composed of a metal chain connecting a car and a counterweight provided at a position facing the car,

the balance chain for an elevator includes the metal chain in which a flexible cord is spirally wound.

2. The balance chain for an elevator according to claim 1,

the metal chain is constituted by a plurality of endless links, inner peripheries of which are in contact with each other and connected to each other, and,

the cord is helically wound around the outer periphery of the link.

3. The balance chain for an elevator according to claim 2,

the cord is wound around the metal chain so as not to penetrate through the hole of the link.

4. The balance chain for elevator according to any one of claims 1 to 3,

the two strings are spirally wound around the surface of the metal chain in such a manner that the two strings are interlaced with each other.

5. The balance chain for an elevator according to claim 4,

the two ropes cross every 1 st of the plurality of endless chain links.

6. The balance chain for an elevator according to any one of claims 1 to 5,

the cord is composed of synthetic resin.

7. The balance chain for an elevator according to claim 5,

the cord is a synthetic resin tape.