JPS6117603A - Float bridge - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention provides a bridge end suitable for being loaded onto a transport vehicle and moved to an arbitrary location to reduce the load to the same extent as the load acting on the joint between bodies. The present invention relates to the structure of the conductive plate joint.

(Background of the Invention) A conventional floating bridge is shown in Fig. 1, which is a vertical cross-sectional view of the bridge state.The bridge section has a plurality of floating bodies 1 connected in the longitudinal direction of the transverse axis by upper work seats 2 and lower connecting pins 3. , the berthing part is the bridge end guide plate 4
Hinge 5. The hydraulic cylinder 6 is connected to the floating body 1 via the swing arm 7 by an upper work seat 2 and a lower connecting pin 3. The bridge end guide plate 4 forms a floating bridge by expanding and contracting hydraulic cylinders 6 for raising and lowering to match the height of the riverbank 8. 9 is the water surface.

10 is a vehicle passing over the floating bridge.

Between the floating bodies l and between the bridge end conductor plate 4 and the floating body l in Fig. 1
Details of the joint between the two are shown in FIG. In the case of connection with the bridge end guide plate 4, the upper work seat 2 is fixed to the floating body l and the swing arm 7 of the bridge end guide plate 4, respectively, and the pin receivers 11 and 12 connected by the lower connecting pin 3 are adjacent to each other. floating body 1
and the swing arm 7 of the bridge end conductive plate 4, respectively.

In other words, as mentioned above, each floating body and the joints between the floating body 1 and the bridge end guide plate 4 are all fixed so as not to expand or contract, but between the floating bodies 1 in the bridge area, the load from passing vehicles is applied to the area between the floating bodies 1. When this occurs, a reaction force (buoyant force) that directly supports the load is generated near the load trap point due to the sinking of the floating body 1, so a very large bending moment is not generated in the bridge.

However, when there is a load near the joint between the bridge end conductor plate 4 and the floating body l, this will not happen, and the load point will not sink because the tip of the 8V end conductor plate 4 is in contact with the shore and there is no subsidence. It becomes smaller, and the support reaction force due to buoyancy is small, so that it supports the load in a suspended manner, so the bending moment becomes larger compared to the bridge section. This bending moment M is the product of the lateral end support reaction force R and the length l of the bridge end conductive plate 4. In conventional floating bridges, this bending moment M
has to be kept small, so the length l of the bridge end conductor plate 4 cannot be made very large, which has the disadvantage that the usable riverbank height H is restricted.

[Purpose of the invention]

The object of the present invention is to connect the bridge end conductor plate of a floating bridge for vehicles passing through.

To reduce the load that acts on this part when it is near the joint, and more precisely, to reduce the load that acts on the joint near the center when a passing vehicle is near the center of the floating bridge. It's about making it into something.

[Summary of the invention]

The present invention provides a flexible connection between the bridge end guide plate and the floating body when the connection between the floating bodies in the bridge area of the floating bridge is rigid, and when a load is applied to this part, the bending prevents the sinking. The unique feature is that even if the berthing part does not sink, this part will sink to the same extent as the center of the floating bridge when there is a single layer near the center.

[Example of Situation]

An embodiment of the present invention will be described below with reference to FIG. Third
The figure is a detailed vertical cross-sectional view of the joint between the bridge end guide plate and the horizontal opening floating body, in which the elastic body 14 is inserted between the crimp seat 13 of the bridge end guide plate 4 and the swing arm 7. The elastic body 14 uses rubber or the like,
The upper work seat 13 is made to contract when a compressive load is applied to it. Reference numeral 15 designates a pin holder of the lower connecting pin 3 on the bridge end conductive plate 4 side, and an elastic body 17 is inserted between the flange 16 fixed to one end of the pin holder 15 and the swing arm 7. The elastic body 17 is made of rubber or the like, and is made to expand when a tensile load is applied to the pin receiver 15. A hydraulic cylinder 6 is connected between the bridge end guide plate 4 and the swing arm 7, and an accumulator 19 is connected to the robed side of the cylinder through a hydraulic pipe 18.

The accumulator 19 is partitioned by a flexible diaphragm and an inert gas 4 such as nitrogen gas is sealed therein.
When a tensile load is applied to the hydraulic cylinder 6, the inert gas 2
1 is compressed, and the hydraulic cylinder 6 expands by an amount commensurate with this contraction.

In Figure i3, the elastic body 14. Elastic body for lower connecting pin holder! ? and a hydraulic cylinder accumulator 19, but one to one of these three.
The purpose can be achieved by providing only two types.

According to this example, when a bending moment acts on the joint between the bridge end conductor plate 4 and the floating body 1 in the bridge area, a displacement occurs that bends this part depending on the magnitude of the moment. Since the amount of sinking of the floating body 1 increases and the reaction force due to buoyancy increases, there is an effect that the magnitude of the bending moment acting on this part can be alleviated.

In addition, it is also possible to elastically connect the floating bodies in the bridge area, and to elastically connect the floating bodies at the bridge end and the bridge end guide plates using an elastic body with a lower bounce constant. It is.

〔Effect of the invention〕

According to this invention, when the length of the bridge end conductor plate is made thicker and the bending moment acting on the joint part of the bridge end conductor plate becomes large, this bending moment is applied to the joint between floating bodies in the bridge part. Since the bending moment acting on the bridge can be reduced to the same magnitude as the bending moment acting on the bridge, it is possible to create compatible designs with all floating bodies having the same strength. Since it is no longer necessary to strengthen all floating bodies to meet the strength required for This has the effect of creating a floating bridge.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of the bridge condition of a conventional floating bridge, Figure 2 is a detailed vertical cross-sectional view of the connection between the floating bodies in the bridge section and between the bridge end conductor plate and the floating body at the end of the bridge in Figure 1. FIG. 3 is a detailed longitudinal cross-sectional view of the connection between the bridge end guide plate and the floating body at the bridge end of the floating bridge of the present invention. 1...Floating body, 3...Lower connecting pin, 4
...Bridge end conductor plate, 5...Hinge, 6...
...Hydraulic cylinder, 7...Swing arm, 13.
...Upper crimping seat, 14...Elastic body, 15
...Pin holder for lower coupling pin, 17...
Elastic body, 19... curved accumulator

Claims (1)

[Claims] 1. A plurality of floating bodies in the bridge area and a bridge end conductor plate connecting the floating bodies and the shore are arranged in the longitudinal direction of the bridge axis, and a crimping seat at the upper part and a connecting pin at the lower part are connected between them. 1. A floating bridge, characterized in that the floating bodies in the bridge section are rigidly connected to each other, and the floating bodies at the end of the bridge and the bridge end conductive plates are elastically connected. 2. The floating bridge according to claim 1, characterized in that an elastic body is inserted into the upper crimping seat of the bridge end conductor plate joint. 3. Claim 1 or 2 is characterized in that an elastic body is inserted between the pin receiver of the lower connecting pin of the bridge end conductor plate coupling portion and the bridge end conductor plate so as to be expanded by tension. A floating bridge. 4. In any one of claims 1 to 3, a hydraulic cylinder for lifting and lowering the bridge end guide plate is used for the elastic connection, and the piping system on the side that generates pressure when the hydraulic cylinder is pulled. A floating bridge that is equipped with an accumulator that is filled with inert gas.