KR200262484Y1 - Apparatus for preventing a bridge fall by using metal chain covered and filled with rubber - Google Patents

Abstract

The present invention aims to provide a device for preventing falling of a bridge by a rubber-clad chain that can absorb fine vibrations and minimize impact during an earthquake by interposing a natural rubber member between connecting chains.

The fall prevention device of the bridge by the rubber-clad chain according to the present invention, the chain structure for connecting the upper mold and the upper mold of the bridge with each other; A buffer member which fills a gap between the unit chain members of the chain structure for the remaining portions except for both ends of the chain structure, and covers the entire structure to absorb and mitigate vibration; And a fixing member for fixing both ends of the chain structure coated with the buffer member to each upper mold.

According to the present invention, since the natural rubber member having excellent vibration absorption and cushioning performance is filled and coated between the unit chain members and the entire chain structure, the fine vibration can be absorbed and disappeared, and the earthquake occurs when a strong earthquake occurs. By minimizing the impact on the connection of the prevention device and other bridges, there is an advantage to minimize the damage during the earthquake.

Description

Apparatus for preventing a bridge fall by using metal chain covered and filled with rubber}

The present invention relates to a device for preventing falling of bridges, and more particularly, by absorbing and coating a natural rubber member having a superior rubber absorption and cushioning performance due to displacement during an earthquake to a gap between steel chains, to absorb fine vibration and to prevent earthquake. The present invention relates to a device for preventing falling of a bridge by a rubber-clad chain, which can minimize the impact of the bridge connection.

Conventional methods for preventing falling bridges can be largely classified into three types. That is, a method of forming a hole in the lower end of the structure and installing a shear key, a method of installing a shear resistance key in the bridge support to resist horizontal force during an earthquake, steel plates and steel chains between the upper structures, etc. How to connect it.

However, all three methods can be expected to prevent the falling off, but it is difficult to expect a fine mutual vibration and shock absorbing function. That is, the fall prevention device that has been used up to now, as shown in Figure 1, taking the method of directly connecting the connection between the upper mold (101a) (101b) only the steel plate 102, the ability to absorb fine vibration There is a shortage of damage, and there is a fear that damage may occur on the end sides of the upper molds 101a and 101b due to mutual impacts between structures during an earthquake. In Fig. 1, reference numerals 103a and 103b denote a bridge device, and 104 denotes a bridge bridge, respectively.

The present invention has been devised in view of the above matters, and by interposing a natural rubber member between the connecting chains for the fall prevention device, it is possible to absorb the fine vibration and minimize the impact of the earthquake. Its purpose is to provide a fall prevention device.

1 is a state in which the fall prevention device of the conventional bridge is installed in the upper mold of the bridge.

Figure 2 is a state in which the fall prevention device of the bridge by the rubber-clad chain according to the present invention is installed in the upper mold of the bridge.

Figure 3 is a detailed view of the fall prevention device of the bridge by the rubber coated chain according to the present invention.

Figure 4 is a conceptual diagram of the mechanical behavior of the rubber coating material when the tensile force acts on the device for preventing falling of the bridge by the rubber coated chain according to the present invention.

<Explanation of symbols for main parts of the drawings>

101a, 101b ... Top mold 102 ... Steel plate

103a, 103b ... Study device 104 ... Pierce

201 Chain structure 202 Shock absorber

203 ... fixed member

In order to achieve the above object, the fall prevention device of the bridge by the rubber-clad chain according to the present invention,

A chain structure for connecting the upper mold and the upper mold of the bridge to each other;

A buffer member which fills a gap between the unit chain members of the chain structure for the remaining portions except for both ends of the chain structure, and covers the entire structure to absorb and mitigate vibration; And

It is characterized in that it comprises a fixing member for fixing both ends of the chain structure coated with the buffer member to each upper mold.

Here, the cushioning member can be used as long as the material capable of absorbing and mitigating shock or vibration, preferably natural rubber is used.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 and 3 show the fall prevention device of the bridge by the rubber-clad chain according to the present invention, Figure 2 is a view showing the fall prevention device is installed in the upper mold of the bridge, Figure 3 is a fall prevention device Figure shows the configuration in more detail.

2 and 3, the fall prevention device of the bridge by the rubber-clad chain according to the present invention is composed of a chain structure 201, the buffer member 202 and the fixing member 203.

The chain structure 201 is for connecting the upper mold 101a and the upper mold 101a of the bridge to each other, and has a structure of a general metal chain.

The shock absorbing member 202 fills a gap between the unit chain members of the chain structure 201 with respect to the remaining portions except for both ends of the chain structure 201 and covers the entire structure to absorb and alleviate vibration. . Here, the material of the buffer member 202 can be used as long as it is a material capable of absorbing and mitigating shock or vibration, but preferably natural rubber is used.

The fixing member 203 fixes both ends of the chain structure 202 coated with the buffer member 202 to the upper molds 101a and 101b, respectively, and tension bolts or the like are used.

Then, the manufacturing process and construction of the fall prevention device of the present invention of the above configuration will be briefly described.

First, one chain structure is manufactured by processing and assembling a unit metal chain. Then, a certain clearance is secured between each unit metal chain, and a natural rubber series rubber material is coated on the outside of the chain structure. At this time, the coating material is made of a natural rubber-based material that is excellent in elasticity and has a great history of use such as elastic bearing of bridges.

In this way, when the coating | covering of the natural rubber | gum as a shock absorbing member is completed to a chain structure, the fall prevention device mounting hole is formed in the edge part of the main girder of a bridge. Then, both ends of the chain structure coated with the natural rubber are placed in the holes formed in the both girders, respectively, and fastened to the holes using tension bolts or the like. At this time, one end of the chain structure is firmly fixed to the girder, and the other end is fastened to the bolt so that the unit chain of the other end forms a slot hole so as to be free to move with respect to the usual amount of stretching, such as temperature changes. . This completes the installation of the fall prevention device of the present invention.

When the fall prevention device of the present invention is installed as described above, when an earthquake occurs and a force is applied to the fall prevention device by vibrations and impacts between the upper structures of the bridge, as shown in FIG. The tensile force acts as an axial stress and shear force inside the steel chain, and the buffer member 202 of the rubber material between the steel chains exhibits a shock absorbing effect by absorbing and dissipating the stress due to lateral deformation of the rubber material. In addition, even when the fall occurs, the shock absorbing member 202 primarily acts as a buffer against the fall impact, thereby minimizing the effects of falling and breaking of the structure.

As described above, the device for preventing falling of a bridge by a rubber-clad chain according to the present invention is filled with a natural rubber member having excellent absorption and buffering performance of vibration between unit chain members and the entire chain structure. It has the advantage of minimizing the damage in case of earthquake by minimizing the impact on the connection of fall prevention device and other bridge in case of strong earthquake.

Claims (2)

A chain structure for connecting the upper mold and the upper mold of the bridge to each other; A buffer member which fills a gap between the unit chain members of the chain structure for the remaining portions except for both ends of the chain structure, and covers the entire structure to absorb and mitigate vibration; And And a fixing member for fixing both ends of the chain structure coated with the shock absorbing member to each upper mold. The method of claim 1, The damping member of the bridge by the rubber coating chain, characterized in that the cushioning member is natural rubber.