JPH0441203B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rapid deployment structure of a foldable deployable floating bridge having a main bridge body and an auxiliary floating body, and a locking structure between the main bridge body and the auxiliary floating body during deployment.

[Prior Art] A deployable floating bridge that has a collapsible main bridge body and auxiliary floating bodies installed on the sides of the main bridge body, and in which the main bridge body and the auxiliary floating bodies are expanded to form a bridge, is disclosed in Japanese Patent Application Laid-open No. 1983- This method is known from JP-A No. 126808, Japanese Patent Application Laid-open No. 60-95008, etc.

As shown in Figure 4, the conventional deployable floating bridge mentioned above is
The main bridge body 1 is foldable with a lower hinge 2, and the auxiliary floating body 3 is connected to the side of the main bridge body 1 with an upper hinge 4.When transported on land, the deployable floating bridge can be folded for convenient transportation. I'm starting to measure things.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional deployable floating bridge, when the floating bridge is floated on the water surface and deployed during bridge construction, the upper parts of the hinge 2 parts of the main bridge body 1 come into contact and form a lock structure. Therefore, rotation due to moment can be easily locked, but since the connecting rod between main bridge body 1 and auxiliary floating body 3 is connected by an upper hinge, it is not a structure that can fix moment, and fluctuations in buoyancy after deployment can occur. Since the joint opens and closes depending on the loading condition of the traveling vehicle, it is necessary to lock the lower hinge underwater by a pin joint.

However, since this lock is located underwater and at the bottom of the auxiliary floating body 3, it is not easy to operate the lock by hand.

In addition, when a floating bridge is deployed, a moment is generated due to the relationship between the acting positions of the center of gravity and the center of buoyancy, and a force that attempts to deploy is generated. Therefore, smooth execution of this unfolding movement may be hindered.

SUMMARY OF THE INVENTION An object of the present invention is to allow a deployable floating bridge to be deployed smoothly and quickly, and to easily lock the main bridge body and the auxiliary floating body during deployment.

[Means for solving the problem] The deployable floating bridge for achieving the above purpose consists of a collapsible main bridge body and auxiliary floating bodies installed on the sides of the main bridge body. In a deployable floating bridge that bridges with expanded auxiliary floating bodies, an air bladder connected to an air cylinder is arranged between the surfaces of the collapsible main bridge body that come into contact when folded, and the main bridge body and the auxiliary floating body are connected. A connecting rod is provided on either the main bridge body or the auxiliary floating body, which is driven in and out by compressed air from an air cylinder, and a chamber is provided on the other side to receive the connecting rod.

[Function] In the deployable floating bridge of the present invention, an air bladder is provided between the folding contact surfaces of the main bridge bodies, so that
During deployment, compressed air is pumped into the air sac from an air cylinder to inflate the air sac, allowing the main bridge body to be actively deployed. Deploys quickly and smoothly.

When deployed, the lock between the main bridge body and the auxiliary floating body is fixed by inserting the connecting rod into the chamber of the mating member using compressed air from an air cylinder, and this fixation does not involve manual work underwater. So it can be done easily.

[Embodiments] Hereinafter, preferred embodiments of the deployable floating bridge according to the present invention will be described with reference to the drawings.

1 to 3 show embodiments of the invention. In the figure, 11 is a foldable main bridge body, and auxiliary floating bodies 12 are installed on both sides of the main bridge body.

The folding connection of the main bridge body 11 is performed by a lower hinge 13 that is located on the lower side when unfolded. The auxiliary floating body 12 is connected to the main bridge body 11 by an upper hinge 14 that is located on the upper side when deployed. The structures of the upper hinge 14 and the lower hinge 13 may be any known means as long as they are rotatable.

An air sac 16 is disposed between the surfaces 15 and 15 of the main bridge body 11 that come into contact when folded, and the air sac 16 is connected to the valve 1 by means of a hose or piping.
It is connected to an air cylinder 18 via 7. The air sac 16 is deflated when the floating bridge is folded, and is expanded by opening the valve 17 and feeding compressed air from the air cylinder 18 when the floating bridge is unfolded.

At the connecting portion between the main bridge body 11 and the auxiliary floating body 12, a connecting rod 19 is provided on one of the members, in the illustrated example, the main bridge body 11 so as to be freely retractable, and on the other member,
In the illustrated example, the auxiliary floating body 12 is provided with a chamber 20 that can receive the connecting rod 19 at a position corresponding to the connecting rod 19. Compressed air from the air cylinder 18 can be introduced into the chamber 21 at the bottom of the connecting rod 19 via a valve 22 . The chambers 20 and 21 extend in the width direction of the deployable floating bridge, and their axes are aligned. The cross-sectional area of the chamber 20 is slightly larger than the cross-sectional area of the connecting rod 19, so that the connecting rod 19 can be smoothly slidably received, but there is not much play when the connecting rod 19 is received. Main bridge body 1 of auxiliary floating body 12
The size is set to be able to lock movement in the rotational direction with respect to 1.

To explain the operation of the deployable floating bridge configured as described above, the deployable floating bridge is folded during transportation. During bridge construction, the floating bridge is deployed floating on the water surface.

Compressed air from the air cylinder 18 is fed into the air sac 16 during deployment. As a result, the floating bridge is deployed not only by the moment generated by the relationship between the center of gravity of the floating bridge and the center of buoyancy, but also by the active deployment means of the air pouch 16, ensuring that the floating bridge can be deployed smoothly and quickly. can.

After being deployed, the main bridge body 11 and the auxiliary floating body 12 are locked by the connecting rod 19. The lock is connected to the connecting rod 1 by compressed air from the air cylinder 18.
9 into the chamber 20. This lock allows the auxiliary floating body 12 to
1 in the rotational direction, the auxiliary floating body 12 will not open or close even if it is subjected to flowing water or a fluctuating load from a running vehicle. Moreover, the locking of the folded portion of the main bridge body 11 is automatically achieved by the abutment of the upper part of the main bridge body 11.

When folding the deployable floating bridge again, cut off the supply of compressed air from the air cylinder 18 and
6 is contracted and the connecting rod 19 is pulled out from the chamber 20.

[Effects of the Invention] As explained above, in the case of the deployable floating bridge of the present invention, an air sac that is inflated by sending compressed air from an air cylinder is arranged between the surfaces that come into contact when the main bridge body is folded. Since a connecting rod and a chamber that can receive the connecting rod are installed at the connecting part between the main bridge body and the auxiliary floating body, the air sac is inflated during deployment for quick and smooth deployment, and after deployment, the connecting rod is By inserting it into the chamber, it is possible to obtain both the effects of reliable and easy locking.

[Brief explanation of drawings]

Figure 1 is a front view of a deployable floating bridge according to an embodiment of the present invention, Figure 2 is a front view of the deployable floating bridge in Figure 1 during deployment, and Figure 3 is a main bridge body of the deployable floating bridge in Figure 1. FIG. 4 is a cross-sectional view of a connecting portion with an auxiliary floating body, and a front view of a conventional deployable floating bridge. 11... Main bridge body, 12... Auxiliary floating body, 16...
Air duct, 19...connecting rod, 20...chamba.

Claims (1)

[Claims] 1 In a deployable floating bridge consisting of a folding main bridge body and an auxiliary floating body installed on the side of the main bridge body, in which the main bridge body and the auxiliary floating body are expanded to form a bridge, the collapsible main bridge body An air bladder connected to an air cylinder is placed between the surfaces that come into contact when folded, and at the connection between the main bridge body and the auxiliary floating body, compression from the air cylinder is applied to either the main bridge body or the auxiliary floating body. A deployable floating bridge characterized in that it is provided with a connecting rod that is driven in and out by air, and a chamber that receives the connecting rod on the other side.