JP2892954B2 - Bridge folding device for emergency bridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding and unfolding apparatus for an emergency bridge which is loaded on a transport vehicle, moves to an arbitrary place, and temporarily builds a bridge in a river or a space.

[0002]

2. Description of the Related Art Conventionally, an apparatus for folding and unfolding a bridge of an emergency bridge is described in Jane's Military Logistics, 1989, pp. 151-152, 167.
Page to page 168 (Jnae's Military Logistics. 1989, P
P151-152, PP167-168).

[0003] In each case, when the bridge is folded and unfolded, a lifting wire rope is connected to the lower portion of the inner side surface of the main girder by a hook and lifted, so that the lifting force is used or the lifting is performed during the folding. The main girder is folded and unfolded using the reaction force of its own weight when it is wholesaled on a table.

[0004]

According to the above prior art, folding and unfolding operations can be performed relatively easily without providing a drive mechanism at the bridge node.

[0005] However, since all of these require installation and removal operations of the wire rope, there is a difficulty in speeding up the operation and responding to automation. In addition, the bridge node being lifted may be tilted due to the influence of the surrounding environment such as wind, and may not be able to be deployed or folded.

SUMMARY OF THE INVENTION An object of the present invention is to unfold and fold a bridge node automatically and reliably without being affected by the surrounding environment.

[0007]

According to the present invention, in order to achieve the above object, a main girder is hingedly connected to the left and right ends of the bridge deck so as to be rotatable, and is pivoted on the lower surface of the bridge deck in parallel with the bridge deck. A possible lever is provided, and a support member is provided at the end of the lever to support the main girder from the inside and to be rollably coupled to the lever or the main girder.

[0008]

[Function] First, when folding a bridge, the lever is rotated. The support attached to one end of the lever is drawn toward the center of the bridge as the lever rotates. The main girder, which is connected to the other end of the support, rotates inward around the hinge and is folded, with the support being closer to the center. When the bridge node is deployed, the lever is rotated in the opposite direction to the above, and the support member is pushed outward, whereby the main girder is rotated outward around the hinge and deployed.

Since the main girder is rotated by the driving mechanism having the above-described structure, the folding and unfolding operations can be reliably performed, and automation can be easily performed. It is not affected by surroundings.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. First, the overall structure of the emergency bridge will be described with reference to FIGS. FIG. 1 is a side view of an emergency bridge in a bridge state, and FIG.
It is 2-2 sectional drawing of. In FIG. 1, the erection guide beam 30 under the bridge is first connected aerial, and is supported by the jack devices 40, 40 at the near shore 60 and the far shore 61. Thereafter, the bridge section 10 is successively connected along this. While extruding from the near shore 60 to the far shore 61, the bridge 62 is completed, and the jack device 4
The vehicle 63 passes over the bridge erected in this manner by contracting 0 and 40 to ground the lower surfaces of both ends of the bridge 62.

FIG. 2 is a sectional view taken along line 2-2 of FIG.
Shows a top view of the bridge section 10 and a perspective view of the mechanism.

In FIG. 2 and FIG. 3, the bridge section 10 is a bridge deck 1
1, a main girder 13, 13 rotatably connected to both left and right ends thereof by hinges 12, 12, a horizontally rotatable lever 14 on the lower surface of the bridge deck 11, and a bracket 15 attached to both ends of the lever 14. Further, it is constituted by a support member 17 which engages with a support member 16 mounted inside the main girder 13.

The bracket 15 can rotate horizontally about the center of engagement of the lever 14 and can rotate vertically about the center of engagement with the support member 17.

The support member 16 is rotatable in parallel with the inner surface of the main girder 13 around the center of engagement with the main girder 13 and supports the support member 17.
It can rotate around the center of the meeting.

4 to 6 show a method of driving the lever 14 of the bridge node 10 to rotate. FIG. 4 shows a state where the bridge node 10 is lifted by the lifting device 20. The lifting tool 20 is lifted by a crane 31 and is lifted by a lifting section 22 at a hanging point 19 to lift a bridge. The lifting tool frame 21 that fits with the crane 31 rotates the lever rotation pin 23 and the lever rotation pin 23. There is provided a lever rotating device 24 for causing the lever to rotate.
The lever rotation device 24 is constituted by a hydraulic motor, a speed reducer, and the like, so that a hydraulic source can be obtained from the crane 31.

FIG. 5 shows the arrangement of the rotating part of the lever 14, and FIG. 6 shows a view 6-6 of FIG. The lever 14 is attached to the bridge section 11 integrally with the shaft 18,
It can rotate horizontally about the axis 18. Axis 1
8, an oval groove is provided as shown in FIG. The tip of the lever rotation pin 23 has an elliptical shape so as to fit in the groove.

When the bridge node 10 is lifted by the lifting device 20, the lever 14 is rotated by aligning the tip of the lever rotation pin 23 with the groove of the shaft 18 and rotating the same.

FIG. 7 shows a state where the bridge section 10 is being developed, and FIG. 8 shows a view 8-8 of the same. When the bridge 10 is folded, when the lever 14 is rotated, the support member 17 is drawn to the center of the bridge 10. With this action, the main girder 10 is pulled by the support member 17 and pivoted inward around the hinge 12.

FIG. 9 shows a state where the bridge node 10 is folded. When unfolding the bridge section 10, hold the lever 14
Rotate in the opposite direction of folding. Thereby, the support material 17
Is pushed outward, and the main girder 13 is supported by the support member 1.
7 and is pivoted outward about hinge 12.

According to this embodiment, since the unfolding and folding operations are performed by the above-described driving mechanism without using a wire rope, no manual operation is required and automation can be facilitated. In addition, reliable deployment and folding can be performed without being affected by the inclination of the bridge due to surrounding conditions such as wind.

[0021]

According to the present invention, the unfolding and folding operation of the bridge can be performed without using a wire rope. In addition, since there is no need to replace the wire rope, automation is facilitated.

[Brief description of the drawings]

FIG. 1 is a side view of an emergency bridge in a bridge state according to an embodiment of the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a plan view and a perspective view of a bridge node.

FIG. 4 is a cross-sectional view of a state where a bridge node is suspended in the air by a lifting device.

FIG. 5 is a cross-sectional view of a driving force transmission unit of the deployment device.

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is a cross-sectional view of a bridge section in the middle of folding.

FIG. 8 is a plan view and a perspective view of FIG. 7;

FIG. 9 is a cross-sectional view when the bridge folding is completed.

[Explanation of symbols]

10 bridge bridge, 11 bridge deck, 12 hinge, 13 main girder, 14 lever, 15 bracket, 16 support end,
17 ... Supporting material, 18 ... Shaft, 20 ... Hanging tool, 24 ... Lever rotating device, 25 ... Lever rotating pin.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Yoshihiro Nakano Inventor 794, Higashi-Toyoi, Kazamatsu, Kudamatsu-shi, Yamaguchi Prefecture Inside Hitachi Kasado Plant (72) Kazuo Makino 794, Higashi-Toyoi, Kazamatsu-shi, Yamaguchi, Japan Hitachi, Ltd. Inside the Kasado Plant (72) Inventor Hisanori Uehara 794, Higashi-Toyoi, Kazamatsu City, Yamaguchi Prefecture Inside the Kasado Plant, Hitachi, Ltd. (58) Field surveyed (Int.Cl. ⁶ , DB name) E01D 15/12

Claims (2)

(57) [Claims] 1. A bridge joint wherein left and right main girders and a connecting member therebetween are rotatably joined by hinges each having a pin in a longitudinal direction of the main girders, and the width thereof can be reduced by folding. , A lever rotatable about a vertical axis at the center of the connecting member, and a pair of rotating brackets rotatably mounted at positions symmetrical with respect to the axis of the lever. A pair of upper rods rotatably mounted on it, a pair of lower rods rotatably mounted on the longitudinal axis thereof, and a rotatable mounting on the lower rod and rotatable on both sides of the main girder A bridge folding device for an emergency bridge, comprising: a pair of rotating fittings attached to the bridge. 2. The bridge folding apparatus according to claim 1, wherein an engaging portion is provided at the center of the lever, and the engaging portion is rotated from the outside to forcibly fold and expand the bridge. Bridge folding device for emergency bridges.