JP2015024882A - Floating body hanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floating body hanger capable of lessening a workload when a floating body is unfolded/folded.SOLUTION: A floating body hanger 100 comprises: main hoists 130a and 130b that suspend both ends of a floating body 200 in a width direction orthogonal to an unfolding direction of the folding floating body 200 connected in such a manner as to be developable in an accordion fold shape; sub-hoists 140a and 140b that suspend at least both the ends of the floating body 200 in the unfolding direction; and a main frame 110 and arms 120a and 120b, which suspend the main hoists 130a and 130b and the sub-hoists 140a and 140b in a cross-shaped arrangement pattern in a plan view.

Description

  The present invention relates to a floating body lifting tool for lifting a floating body.

When an emergency such as an earthquake occurs, a technique is known in which a plurality of floating bodies (that is, bridges) are thrown into a river and the floating bodies are connected to each other to construct a floating bridge.
The above-described floating body is configured to be foldable in a W shape in a side view, and is loaded on the transport vehicle in a folded state. When the carrier bed is tilted with the floating body loaded, the floating body is thrown into the water surface while sliding on the carrier bed due to gravity. In addition, the floating body is configured so as to naturally expand due to the influence of gravity and buoyancy when thrown into the water surface.

  For example, Patent Document 1 discloses a transport vehicle including a slide fixing frame installed on both sides in the width direction of a cargo bed, a boom installed on the slide fixing frame, and a slide plate installed on the upper surface of the boom. Have been described. The sliding plate is tilted by extending the boom, and the floating body is thrown into the water surface while sliding on the sliding plate.

  Further, in Non-Patent Document 1, a bridge (that is, a floating body) that is thrown into the water surface in a folded state is naturally developed, and a floating bridge is constructed by connecting a plurality of deployed bridges to each other. Have been described.

JP-A-6-336706

Supervised by Yozo Fujino, “A book that teaches the structure and construction of bridges taught by professionals”, 1st edition, Natsume, March 2012, p. 185

  As described above, the floating body that can be folded in a W shape in a side view is thrown into the water surface in a folded state. Moreover, at the time of collection, the floating body is loaded on the transport vehicle while being lifted and folded by a heavy machine or the like.

By the way, when the floating body is maintained (for example, when parts are replaced), the floating body may be deployed on land. The weight of the floating body is, for example, several tons, and it is difficult for an operator to expand the floating body by pushing it out with hands.
Therefore, conventionally, it has been necessary to deploy the floating body one side at a time using two heavy machines at the time of deployment work on land. As a result, there has been a problem that it takes a lot of time and labor to work on the floating body on land.

  Then, this invention makes it a subject to provide the floating body hanging tool which can reduce the work burden at the time of expand | deploying / folding a floating body.

In order to solve the above-described problem, the floating body hanging tool according to the present invention is configured such that a plurality of floating body pieces are connected so as to be deployable in a bellows fold shape in a width direction orthogonal to a deployment direction of a folding floating body. A pair of first hoists that suspend both ends, a pair of second hoists that suspend at least both ends of the floating body, and the first and second hoists in the deployment direction are suspended in a cross arrangement in a plan view. A frame, and the first hoist and the second hoist are used to unfold and fold the floating body in the air.
Details will be described in an embodiment for carrying out the invention.

  ADVANTAGE OF THE INVENTION According to this invention, the floating body hanging tool which reduces the work burden at the time of expand | deploying and folding a floating body can be provided.

It is the perspective view which looked down at the floating body hanging tool which concerns on one Embodiment of this invention, and the unfolded floating body from diagonally right forward. It is the side view which looked at the main frame from the right side. It is the side view which looked at the arm on the right side from back. It is a front view of a main hoist. It is a front view of a sub hoist. It is explanatory drawing of the remote control which sends a radio signal to a control board. It is a side view (figure seen from back) which shows the deployment procedure of the floating body on land. It is a side view (figure seen from back) which shows the folding procedure of the floating body on land. It is a top view which shows the procedure at the time of folding an arm with respect to a main frame. It is a top view of the flame | frame with which the floating body hanging tool which concerns on a modification is provided.

  A mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described in detail with reference to the drawings as appropriate. In addition, as shown in FIG.

<Embodiment>
FIG. 1 is a perspective view of the floating body lifting tool 100 according to the present embodiment and the unfolded floating body 200 looking down from the right front side. The floating body lifting tool 100 expands and folds the floating body 200 in the air in a state where the floating body 200 that can be folded in a W shape is lifted in a side view (front-rear direction).
Hereinafter, prior to the description of the floating body hanging tool 100, the floating body 200 will be briefly described first.

<Structure of floating body>
The floating body 200 serves as a bridge node when the above-described floating bridge (not shown) is constructed, and is inserted into a river or the like at the time of construction. The floating body 200 can be folded in a W shape in a side view (front-rear direction), and is configured to naturally expand under the influence of gravity and buoyancy when thrown into a river or the like in a folded state.

The floating body 200 includes two inner floating bodies 201a and 201b (floating body pieces) and two outer floating bodies 202a and 202b (floating body pieces). As shown in FIG. 1, FIG. 7, etc., the inner floating bodies 201a and 201b are connected to each other so as to be rotatable.
The outer floating body 202a is disposed on the right side of the inner floating body 201a and is rotatably connected to the inner floating body 201a. Similarly, the outer floating body 202b is disposed on the left side of the inner floating body 201b and is rotatably connected to the inner floating body 201b. That is, the two outer floating bodies 202a and 202b are arranged one by one on the outer side of the two inner floating bodies 201a and 201b, and are rotatably connected to the inner floating body adjacent to itself.

The inner floating bodies 201a and 201b and the outer floating bodies 202a and 202b are each made of a shell-like metal member (for example, aluminum), and the inside thereof is hollow.
The inner floating bodies 201a and 201b have a rectangular parallelepiped shape, and hinges (not shown) such that the lower sides of the opposing surfaces (the left side surface of the inner floating body 201a and the right side surface of the inner floating body 201b) become the rotation axis P. )).
A U-shaped hook 203 on which the hook 131 of the main hoist 130a is hung is installed at a position corresponding to the above-described hinge on the front surface of the inner floating bodies 201a and 201b. Similarly, a hook 203 is installed at a position corresponding to the above-described hinge on the rear surfaces of the inner floating bodies 201a and 201b.

  The outer floating body 202a has a columnar shape along the front-rear direction, and is rotatably connected to the inner floating body 201a. That is, the outer floating body 202a is connected to the inner floating body 201a by the hinge (not shown) so that the left side surface of the outer floating body 202a facing each other and the upper side of the right side surface of the inner floating body 201a become the rotation axis Q. ing. Further, the outer floating body 202a is configured such that the length in the vertical direction becomes shorter toward the right end so that the floating body 200 can be smoothly deployed on the water.

A U-shaped hook 204 on which the hook 141 of the sub hoist 140a is hung is installed near the right end of the outer floating body 202a.
Similarly, the outer floating body 202b is connected to the inner floating body 201b by a hinge (not shown) so that the right side surface of the outer floating body 202b facing each other and the upper side of the left side surface of the inner floating body 201b become the rotation axis R. Has been.

By configuring the floating body 200 in this manner, the floating body 200 can be expanded and folded into a W shape in a side view (front-rear direction) (see FIGS. 7 and 8). In other words, the floating body 200 is connected so that a plurality of floating pieces (inner floating bodies 201a and 201b, outer floating bodies 202a and 202b) can be developed in a bellows fold shape.
The structure of the floating body 200 shown in FIG. 1 and the like is an example, and other structures may be used as long as the structure can be developed in a bellows fold shape.

<Configuration of floating body suspension>
The floating body lifting tool 100 is unfolded and folded in the air with the floating body 200 suspended. The floating body suspension 100 includes a main frame 110, arms 120a and 120b, main hoists 130a and 130b, and sub hoists 140a and 140b.

(main frame)
The main frame 110 (frame, first frame) is a member in which main hoists 130a and 130b are installed at both ends in the front-rear direction, and is formed, for example, by drilling / bending / welding an aluminum steel plate. Further, the main frame 110 pivotally supports two arms 120a and 120b (see FIG. 9).
FIG. 2 is a side view of the main frame as viewed from the right. The main frame 110 includes a frame portion 111, suspension portions 112 a and 112 b, an insertion portion 113, extension portions 114 </ b> H and 114 </ b> L, and a restriction portion 115.

The frame part 111 has a rectangular parallelepiped shape, and is elongated in the front-rear direction. Further, in order to route wiring (not shown) in the frame portion 111 and to reduce the weight, the frame portion 111 has a hollow structure, and a plurality of holes h1 are formed in the left wall and the right wall, respectively. Has been.
Note that the length of the frame portion 111 in the front-rear direction corresponds to the length of the floating body 200 in the front-rear direction (see FIG. 1).

The suspension portion 112 a is a plate-like member that retains the main hoist 130 a when the floating body suspension 100 is used, and is welded to the lower wall near the front end of the frame portion 111. The same applies to the hanging portion 112b.
The inserted portion 113 is a plate-like member through which the chain K (see FIG. 1) is inserted when the entire floating body suspension 100 is lifted by a heavy machine (not shown). The two insertion parts 113 are welded to the upper wall of the frame part 111 so as to sandwich the extension part 114H in the front-rear direction.

The extending portion 114H has a plate shape and is provided near the center of the frame portion 111 in the front-rear direction. The extending portion 114H is formed so that the upper surface thereof is continuous with the upper surface of the frame portion 111, and extends rightward from the frame portion 111 (see FIG. 1).
Similarly, the extending portion 114 </ b> L is formed so that the lower surface thereof is continuous with the lower surface of the frame portion 111, and extends rightward from the frame portion 111.

The distance between the extending portions 114H and 114L corresponds to the length of the arm 120a in the vertical direction. That is, the extending portions 114H and 114L are formed so as to sandwich the arm 120a in the vertical direction (see FIG. 1).
The extending portions 114H and 114L are formed with holes (not shown) through which connecting pins 123 described later are inserted. Further, in order to reinforce the main frame 110, the upper extending portion 114H is formed wider in the front-rear direction than the lower extending portion 114L.
Note that the same configuration as that of the extending portions 114H and 114L is also formed on the left side of the frame portion 111 (see FIG. 1).

  The restricting portion 115 is a plate-like member interposed between the upper extending portion 114H and the lower extending portion 114L, and the rotation of the arm 120a described later (rotating counterclockwise in plan view: FIG. 9). For reference). By providing the restricting portion 115, the rotation of the arm 120a is restricted in a state where the extending direction (front-rear direction) of the frame portion 111 and the extending direction of the rotating arm 120a are substantially perpendicular to each other.

  The restriction portion 115 has an upper end welded to the extension portion 114H and a lower end welded to the extension portion 114L. Further, when the arm 120a is unfolded from the folded state, the restricting portion 115 is arranged to allow the arm 120a to rotate until the main frame 110 and the arm 120a become vertical (see FIG. 9). ).

(arm)
An arm 120a (frame, second frame) shown in FIG. 1 is a member that is pivotally supported with respect to the main frame 110 and has a sub hoist 140a installed near the right end. For example, an aluminum steel plate is used. It is formed by drilling, bending, and welding.

FIG. 3 is a side view of the right arm as viewed from the rear. The arm 120 a has a frame part 121, a suspension part 122, and a connecting pin 123.
The frame 121 has a rectangular parallelepiped shape, and is elongated in the left-right direction. It should be noted that the left end of the frame portion 121 is viewed in plan view so that the arm 120a is allowed to rotate until the main frame 110 and the arm 120a are vertical in plan view (that is, so as not to hit the restricting portion 115) It has a semicircular shape (see FIG. 9).
The frame portion 121 has a hollow structure, and a plurality of holes h2 are formed in the front wall and the rear wall, respectively.

  At one end (left end in FIG. 1) of the frame portion 121, a hole (not shown) for inserting the connecting pin 123 is formed along the vertical direction. In order to smoothly rotate the arm 120 a with respect to the main frame 110, the diameter of the hole is slightly larger than the diameter of the connecting pin 123.

Further, considering the moment of gravity acting on the arm 120a, the vicinity of the left end sandwiched between the above-described extending portions 114H and 114L in the frame portion 121 is reinforced.
Note that the length in the left-right direction of the frame portion 121 corresponds to the length in the left-right direction of the pair of inner floating body 201a and outer floating body 202a in the floating body 200 in the unfolded state (FIGS. 1 and 7 (f)). )reference).

  3 is a plate-like member that suspends the sub hoist 140a (see FIG. 1) when the floating body suspension 100 is used. The suspension part 122 is welded to the lower wall near the right end of the frame part 121.

The connecting pin 123 is a rod-like member extending in the vertical direction, and has a circular shape in plan view. The connecting pin 123 is inserted through the frame part 121 and the extension parts 114H and 114L, and has an upper end welded to the extension part 114H and a lower end welded to the extension part 114L. Thus, the arm 120a can be rotated on the horizontal plane with respect to the main frame 110 using the connecting pin 123 as a rotation axis (see FIG. 9).
Since the configuration of the other arm 120b (second frame: see FIG. 1) is the same as that of the arm 120a described above, description thereof is omitted.

By connecting the main frame 110 and the arms 120a and 120b as shown in FIG. 1, the main hoists 130a and 130b and the sub hoists 140a and 140b can be suspended in a cross arrangement in a plan view.
The above-mentioned “cross arrangement” means that main hoists 130 a and 130 b are arranged on a straight line along the front-rear direction among a pair of straight lines perpendicular to each other, and the sub hoists 140 a and 140 a are arranged on a straight line along the left-right direction (deployment direction). 140b is arranged.

(Main hoist)
FIG. 4 is a front view of the main hoist. The main hoist 130a (first hoist) is a device that lifts a connection location (front end of the rotation shaft P: see FIG. 1) of the inner floating bodies 201a and 201b and adjusts the height of the connection location. The main hoist 130 a includes a hook 131, a hook sheave 132, a wire rope 133, an electric motor (not shown), and a housing 134.

The hook 131 is a member that is hung on the hook 203 at the front end of the rotation shaft P (see FIG. 1), and is installed on the hook sheave 132.
The hook sheave 132 is a disk-shaped pulley that guides the wire rope 133, and causes gravity acting on the floating body 200 or the like to act on a motor (not shown) in the housing 134 as tension via the wire rope 133. is there.

  The wire rope 133 is a string that is hung on the hook sheave 132 and wound or lowered by an electric motor (not shown) in the housing 134. The wire rope 133 is wound around a wire drum (not shown) in the housing 134. By rotating the wire drum by the electric motor, the length (that is, the height of the hook 131 shown in FIG. 1) in which the wire rope 133 is drawn out is adjusted.

The electric motor (not shown) has a function of rotating the wire drum (not shown), and is driven by, for example, three-phase AC power. The electric motor is housed in the housing 134 in a state where it is connected to the rotating shaft of the wire drum.
Electric power is supplied to the motor from, for example, an external generator (not shown) via a control panel 150 (see FIG. 1) having an electronic circuit such as an inverter. The electric power source of the electric motor is not limited to the engine generator, and may be another generator, a power storage device, or system power.
The housing 134 accommodates an electric motor (not shown), a wire drum (not shown), and the like, and is installed on a suspension portion 112a (see FIG. 2) of the main frame 110.

The other main hoist 130b (first hoist: see FIG. 1) is a device that lifts the connecting portion of the inner floating bodies 201a, 201b (the rear end of the rotating shaft P: see FIG. 1) and adjusts the height of the connecting portion. It is. Note that power is supplied to the main hoist 130b via wiring (not shown) connected to the control panel 150. The configuration of the main hoist 130b is the same as that of the main hoist 130a.
That is, the pair of main hoists 130 a and 130 b have a function of suspending both ends of the floating body 200 in the width direction (front-rear direction) orthogonal to the deployment direction (left-right direction) of the floating body 200.

(Sub hoist)
FIG. 5 is a front view of the sub hoist. The sub hoist 140a (second hoist) is a device that lifts the right end (outer end portion) of the outer floating body 202a and adjusts the height of the right end. The sub hoist 140a is installed in the suspension part 122 (see FIG. 3) of the arm 120a, and the length by which the chain 143 is drawn out can be adjusted by driving an electric motor (not shown) in the housing 144. Yes.

  The hook 141 installed on the hook sheave 142 is hung on the hook 204 at the right end of the outer floating body 202a (see FIG. 1). And the height of the hook 204 of the outer side floating body 202a is adjusted by hoisting / lowering the chain 143 by driving the electric motor.

The other sub hoist 140b (second hoist) is installed at the left end of the arm 120b. Further, the hook 141 of the sub hoist 140b is hung on the hook 204 at the left end of the outer floating body 202b.
And the height of the right-and-left both ends (outer edge part) of the floating body 200 is adjusted with the sub hoists 140a and 140b. That is, the pair of sub hoists 140 a and 140 b have a function of suspending both ends of the floating body 200 in the deployment direction (left-right direction) of the floating body 200.

(Other equipment)
FIG. 6 is an explanatory diagram of a remote controller that sends a radio signal to the control panel. The remote controller 300 is operated when remotely operating the main hoists 130a and 130b and the sub hoists 140a and 140b, and transmits a radio signal to the control panel 150 according to the operation.
The remote control 300 is provided with a plurality of buttons operated by the operator. Examples of the buttons include a power button 301, an emergency stop button 302, an interlock button 303U, and a single action button 305U.

  The interlock button 303U is a button that is pressed by an operator when the electric motors are synchronously operated so as to wind up the wire rope 133 with respect to the two main hoists 130a and 130b. When the interlock button 303U is pressed by an operator, the height of the hooks 131 of the main hoists 130a and 130b is substantially the same, and the rotation axis P can be raised while keeping the rotation axis P horizontal. The same applies to the other interlock buttons 303D, 304U, and 304D.

Single-acting button 305U is a button that is pressed by an operator when raising hook 131 of one main hoist 130a. By pressing the single action button 305U by the operator, only the main hoist 130a can be raised, and the front end of the rotating shaft P (see FIG. 1) can be raised for fine adjustment. The same applies to the other single action buttons 305D, 306U, and 306D.
The single action button 307U is a button that is pushed by the operator when the hook 141 of one of the sub hoists 140a is raised. Note that description of the other single-acting buttons 307D, 308U, and 308D is omitted.

<Procedure for floating body>
FIG. 7 is a side view (viewed from the rear) showing a procedure for developing a floating body on land. As shown to Fig.7 (a), the floating body 200 which can be expand | deployed and folded by W shape by side view is mounted on the land in the folded state. In addition, in order to prevent damage to the floating body 200, the floating body 200 is placed on the sleepers G.

As shown in FIG. 7 (a), in a state where the floating body 200 is folded, the hooks 203 installed at the connecting portions of the inner floating bodies 201a and 201b and the outer ends of the outer floating bodies 202a and 202b are installed. The hanging tool 204 is exposed near the upper end of the floating body 200.
First, the operator hangs one end of the chain T1 on the hook 203 at the front end of the rotation shaft P shown in FIG. 1, and hangs the other end of the chain T1 on the hook 131 (see FIG. 4) of the main hoist 130a. Similarly, the chain T1 is attached to the hook 203 on the rear end of the rotation shaft P and the hook 131 of the main hoist 130b.

  Further, the operator hangs one end of the chain T2 on the hook 204 (see FIG. 1) at the right end of the outer floating body 202a, and hangs the other end of the chain T2 on the hook 141 (see FIG. 5) of the sub hoist 140a. Similarly, the chain T2 is attached to the hook 204 at the left end of the outer floating body 202b and the hook 141 (see FIG. 5) of the sub hoist 140b.

Next, a hook F of a heavy machine (or an overhead crane: not shown) is hung on the chain K, and the entire floating body suspension 100 is lifted by this heavy machine. The chain K is inserted through the insertion portion 113 (see FIG. 1) of the main frame 110.
Then, the main hoists 130a and 130b, the sub hoists 140a, and the sub hoists 140a are operated by operating the remote controller 300 (the interlock button 304U and the like: see FIG. 6) so that the wire rope 133 and the chain 143 are in a tensioned state (see FIG. 7A). 140b is driven.

  Next, as shown in FIG.7 (b), the floating body suspension tool 100 whole is lifted and lifted with a heavy machine (not shown), and the floating body 200 is grounded. Here, the left and right ends (outer ends) of the outer floating bodies 202a and 202b are lifted by winding up the chains 143 of the sub hoists 140a and 140b by operating the remote controller 300. That is, tension (a component force in the horizontal direction) is generated outward in the developing direction in the outer floating bodies 202a and 202b.

As a result, the next time the wire rope 133 of the main hoists 130a and 130b is unwound, the inner floating bodies 201a and 201b and the outer floating bodies 202a and 202b can be easily opened (see FIG. 7C).
In the state shown in FIG. 7B, the gravity acting on the inner floating bodies 201a and 201b, the drag from each hinge, and the tension of the chain T1 are balanced, and the inner floating bodies 201a and 201b are folded. It remains rare.

  Next, when the wire ropes 133 of the main hoists 130a and 130b are lowered by the operation of the remote controller 300 (interlock button 303D etc .: see FIG. 6), the state shown in FIG. That is, the inner floating body having the above-described hinge (not shown) as the rotation axis P (see FIG. 1) is formed by the outward tensile force received from the outer floating bodies 202a and 202b and the own weight of the inner floating bodies 201a and 201b. 201a and 201b are developed.

  When the wire rope 133 of the main hoists 130a and 130b is further lowered, the left wall of the inner floating body 201a comes into contact with the right wall of the inner floating body 201b, and the inner floating bodies 201a and 201b are contacted as shown in FIG. Development is regulated.

Next, when the inner floats 201a and 201b are lowered onto the sleepers G by heavy machinery (not shown) while maintaining the relative positions of the inner floats 201a and 201b and the outer floats 202a and 202b, the state shown in FIG. .
Further, when the wire rope 133 of the main hoists 130a and 130b is wound up by operating the remote controller (such as the interlock button 303U) while lowering the entire floating body suspension 100 with a heavy machine (not shown), the state shown in FIG. become. As a result, the outer floating body 202a is rotated and developed around a connecting portion (rotating axis Q: see FIG. 1) with the inner floating body 201a. The same applies to the outer floating body 202b.

<Floating body folding procedure>
FIG. 8 is a side view (viewed from the rear) showing a procedure for folding a floating body on land. As shown in FIG. 8A, the floating body 200 is placed on the sleepers G in the unfolded state.
The operation of the floating body hanging tool 100 at the time of folding is in the reverse order to that at the time of unfolding. That is, one end of the chain T1 is hung on the hanging tool 203 in a state where the entire floating body hanging tool 100 is lifted by a heavy machine or the like (not shown), and the hook 131 (see FIG. 4) of the main hoists 130a and 130b is hung on the chain T1. The other end is hung.
Further, one end of the chain T2 is hung on the hanging tool 204, and the other end of the chain T2 is hung on the hook 141 (see FIG. 5) of the sub hoists 140a and 140b.

Next, while lifting the whole floating body suspension 100 with a heavy machine (not shown), the wire ropes 133 of the main hoists 130a and 130b are lowered to stand the outer floating bodies 202a and 202b (see FIG. 8B). Subsequently, while maintaining the relative positions of the inner floating bodies 201a and 201b and the outer floating bodies 202a and 202b, the entire floating body suspension 100 is lifted by a heavy machine, and the floating body 200 is grounded (see FIG. 8C).
Next, while maintaining the state in which the chain 143 of the sub hoists 140a and 140b is stretched, the wire rope 133 of the main hoists 130a and 130b is wound up to raise the connection location of the inner floating bodies 201a and 201b (FIG. 8D). reference).

Furthermore, the wire rope 133 of the main hoists 130a and 130b is wound up, and the inner floating bodies 201a and 201b are folded (see FIG. 8E). In addition, when the whole floating body hanging tool 100 is lowered | hung next, the chain extended | fed out from the sub hoists 140a and 140b in the state of FIG.8 (e) so that the outer side floating bodies 202a and 202b may be folded by the drag from the sleeper G. Allow some margin in the length of 143.
Next, when the entire floating body suspension 100 is lowered by a heavy machine (not shown), the outer floating bodies 202a and 202b (the entire floating body 200) are completely folded by the drag from the sleepers G.

<Folding procedure for floating suspension>
FIG. 9 is a plan view showing a procedure for folding the arm with respect to the main frame. As shown by a two-dot chain line in FIG. 9A, in a state where the floating body suspension 100 is deployed in a cross shape in plan view, a space occupied by the floating body suspension 100 is large (for example, 8.1 m × 8.5 m). This is inconvenient when transporting. Therefore, in the present embodiment, in order to facilitate storage and transportation of the floating body hanging tool 100, the arms 120a and 120b are configured to be foldable with the connecting pin 123 as a rotation axis.

  For example, when the floating suspension 100 is transported by a dedicated vehicle, if a moment of force is applied to rotate the arm 120a counterclockwise in plan view, the arm 120a rotates about the connecting pin 123 (see FIG. 9 (a) solid line). When the arm 120a is further rotated, the side wall of the arm 120a (front wall during deployment: see FIG. 1) comes into contact with the right wall of the main frame 110, and the aforementioned rotation is restricted (see FIG. 9B). ). The same applies to the other arm 120b. Thereby, the floating body hanging tool 100 can be transported and accommodated in a compact state (for example, 8.1 m × 1.3 m).

  When unfolding the floating body suspension 100 in a folded state, a moment of force that rotates the arms 120a and 120b clockwise in a plan view is applied, and the arm is controlled until it is regulated by the regulation unit 115 of the main frame 110. 120a and 120b are rotated. In a state in which the arms 120a and 120b are fully rotated, the floating body suspender 100 has a cross shape in a plan view (two-dot chain line in FIG. 9A).

<Effect>
According to the floating body lifting tool 100 (see FIG. 1) according to the present embodiment, the floating body 200 that can be expanded and folded in a W shape in a side view can be expanded and folded in the air. Accordingly, when the floating body 200 is maintained on land, the main hoists 130a and 130b and the sub hoists 140a and 140b can be operated in a state where the floating body 200 is suspended by the floating body suspension 100, so that the floating body 200 can be easily expanded and folded. .
Further, the main frame 110 and the arms 120a and 120b have a cross shape in plan view. Therefore, a hook F (see FIG. 1) such as a heavy machine may be hung near the center of the cross, and the lifting work of the floating body suspension 100 itself can be easily performed.

Conventionally, the floating body 200 has been deployed in order one by one using two heavy machines. For example, after the inner floating body 201a and the outer floating body 202a are expanded by lifting the rotating shafts P and Q (see FIG. 1) by two heavy machines, the inner floating body 201b and the outer floating body are lifted by lifting the rotating shafts P and R. 202b was developed. As described above, two heavy machines are required and it takes much time to expand and fold the floating body 200.
On the other hand, in this embodiment, the floating body suspension tool 100 can be lifted by one heavy machine, and the expansion / folding operation of the floating body 200 can be performed easily and in a short time. Accordingly, it is possible to greatly reduce the work load when the floating body 200 is expanded and folded.

In addition, the floating body suspension 100 has a simple configuration including the main frame 110, the arms 120a and 120b, the main hoists 130a and 130b, and the sub hoists 140a and 140b, so that the cost required for manufacturing the floating body suspension 100 can be suppressed. it can.
Further, by operating the remote controller 300 (see FIG. 5), a wireless command signal is output to the control panel 150, and the main hoists 130a and 130b and the sub hoists 140a and 140b are driven accordingly. That is, when unfolding / folding the floating body 200, the operator only has to operate the remote controller 300 while paying attention to the state of the floating body 200, and the work burden when unfolding / folding the floating body 200 can be reduced.

  In addition, the floating body suspension 100 is configured to be foldable with respect to the main frame 110 by rotating the arms 120a and 120b around the connecting pin 123 (see FIG. 9). Therefore, for example, when the floating body suspension 100 is transported, the floating body suspension 100 can be made compact (elongated shape) by folding the arms 120a and 120b, and the floating body suspension 100 can be loaded on a dedicated vehicle.

In addition, for example, when the floating body 200 (bridge) is inserted into a river and a floating bridge is constructed, there may be a large difference in height between the ground on both banks and the water surface of the river. In such a case, if the floating body 200 loaded on the dedicated vehicle is thrown into the river as it is, the floating body 200 may be damaged by an impact accompanying contact with the river bed.
The floating body 200 is lifted by using the floating body hanging tool 100 according to the present embodiment, and the floating body 200 is gradually lowered and thrown toward the water surface of the river, whereby the above-described floating body 200 can be prevented from being damaged.

≪Modification≫
As mentioned above, although the floating body hanging tool 100 which concerns on this invention was demonstrated by the said embodiment, this invention is not limited to this, A various change can be made.
For example, the floating body 200 may have a configuration in which a plurality of floating body pieces are connected so as to be expandable in a bellows-fold shape, and the floating body 200 includes four floating body pieces (the inner floating bodies 201a and 201b and the outer floating bodies 202a and 202b). It is not limited to the case of form.
Further, in addition to the pair of sub hoists 140a and 140b that suspend both ends of the floating body 200 in the unfolding direction (left and right direction shown in FIG. 1), another sub hoist may be added according to the number of the floating body pieces.

Moreover, although the said embodiment demonstrated the case where the "frame" provided with the main frame 110 and arms 120a and 120b showed a cross shape by planar view (refer FIG. 1, FIG. 9), it is not restricted to this.
FIG. 10 is a plan view of a frame included in a floating body hanging tool according to a modification. Instead of the main frame 110 and the arms 120a and 120b described in the above embodiment, a frame 160 having a square frame shape in plan view may be used as shown in FIG.

The frame 160 is configured to suspend the main hoists 130a and 130b at locations indicated by reference signs A1 and B1, and to suspend the sub hoists 140a and 140b at locations indicated by reference signs A2 and B2, respectively. That is, the main hoists 130a and 130b and the sub hoists 140a and 140b are suspended by the frame 160 in a cross arrangement in a plan view (see the dashed line in FIG. 10).
The floating body 200 can be expanded and folded in the air by driving the main hoists 130a and 130b and the sub hoists 140a and 140b in a state where the frame 160 is lifted by a heavy machine or the like.

  In the embodiment, the arms 120a and 120b are configured to be foldable with respect to the main frame 110. However, the present invention is not limited to this. That is, the arms 120a and 120b may be fixed substantially perpendicular to the main frame 110 so that the floating body suspension 100 has a cross shape in plan view.

  Moreover, although the said embodiment demonstrated the case where the main hoists 130a and 130b and the sub hoists 140a and 140b were driven by operating the remote control 300, it is not restricted to this. For example, a pendant switch (not shown) may be installed in each of the main hoists 130a and 130b and the sub hoists 140a and 140b. In this case, an operator is assigned to each of the four pendant switches, and each operator operates the pendant switch while confirming the state of the floating body 200.

  Moreover, although the said embodiment demonstrated the case where the main hoists 130a and 130b of a structure shown in FIG. 4 were used, it is not restricted to this. That is, other types of hoists may be used as long as the height of the connecting portion between the two inner floating bodies 201a and 20b can be adjusted. Similarly, other types of hoists may be used as long as the height of the outer end portions of the two outer floating bodies 202a and 202b can be adjusted.

Moreover, although the said embodiment demonstrated the case where the chain K inserted in the to-be-inserted part 113 of the main frame 110 hung the hook F and lifted with a heavy machine etc. (refer FIG. 1), it is not restricted to this. That is, the arms 120a and 120b have insertion portions (not shown) welded to the upper walls thereof, and hooks F are hung on the chains K inserted through the insertion portions so as to be lifted by heavy machinery or the like. Also good.
Moreover, you may provide a to-be-inserted part in both the main frame 110 and arms 120a and 120b.

100 Floating body hanging tool 110 Main frame (frame, first frame)
120a, 120b Arm (frame, second frame)
123 connecting pin 130a, 130b main hoist (first hoist)
140a, 140b Sub hoist (second hoist)
150 Control panel 160 Frame 200 Floating body 201a, 201b Inside floating body (floating piece)
202a, 202b Outside floating body (floating piece)
300 remote control

Claims (5)

A pair of first hoists that suspends both ends of the floating body in a width direction orthogonal to a deployment direction of a folding floating body in which a plurality of floating body pieces are connected so as to be deployable in a bellows fold shape;
A plurality of second hoists that suspend at least both ends of the floating body in the deployment direction;
A frame for suspending the first hoist and the second hoist in a cross arrangement in a plan view,
The floating body lifting device, wherein the floating body is expanded and folded in the air by the first hoist and the second hoist. The floating body is
Two floating bodies that are rotatably connected, and two outer floating bodies that are arranged one by one on the outside of the two inner floating bodies and that are rotatably connected to the inner floating body. As
By the first hoist, the height of the connecting portion of the two inner floating bodies is adjusted,
The floating body lifting tool according to claim 1, wherein heights of both ends of the floating body in the deployment direction are adjusted by the second hoist. The frame is
A linear first frame for suspending the first hoist;
The floating body according to claim 1, further comprising: a linear second frame that holds the second hoist and is fixed or connected substantially perpendicularly to the first frame. Hanging tool. The said 2nd frame is connected with the said 1st frame so that folding is possible. The floating body hanging tool of Claim 3 characterized by the above-mentioned. The floating hoist according to any one of claims 1 to 4, wherein the first hoist and the second hoist are driven in accordance with a radio signal from a remote controller.

Images