JP2021011697A - Suspended load moving apparatus, removal method of existing bridge, and installing method of bridge member - Google Patents

Abstract

To provide a suspended load moving apparatus capable of relocating a removal member, which is lifted at the end in the cross direction, to the vicinity of the center of a bridge face (in a direction perpendicular to a bridge-axis) without installing a crane outside a bridge, and a method of removing an existing bridge using the same.SOLUTION: A suspended load moving apparatus of the present invention comprises a horizontal expanding means, a suspending rope, and mobile fixing means. The horizontal expanding means is means for expanding a horizontal span between a first pulley and a second pulley, and the mobile fixing means is configured to include a support base and a moving body horizontally moving on the support base, and a first tip of the suspending rope is attached to the moving body of the mobile fixing means. When the horizontal expanding means reduces the horizontal span, the moving body moves to the side closer to the center of the cross section, and the suspended load held by a suspending tool also moves to the side closer to the center of the cross section.SELECTED DRAWING: Figure 2

Description

The present invention is a technique for horizontally moving a suspended load on a bridge surface, and more specifically, an object suspended near an end in a direction perpendicular to the bridge axis is moved to the center side of the bridge surface in the suspended state. It relates to a suspended load moving device to be used, a method of removing an existing bridge using the device, and a method of installing a bridge member.

In the 1955's, just before the Tokyo Olympics, many structures were constructed, so-called construction rush. These structures are now more than 50 years old. The durability of concrete is said to be 50 years or 100 years, but if it is 50 years, many concrete structures need some measures. In fact, in recent years, inspections of concrete structures have been carried out mainly by local governments, and deterioration and damage have been found in many concretes. Similarly, fatigue phenomena are also observed in steel structures such as steel bridges, which are often used on high-standard roads and highways.

Bridges, which can be said to be typical structures, are extremely important structures without considering the social impact at the time of damage. Therefore, from ancient times, design standards such as "Road Bridge Specification / Explanation" have been established and strictly enforced. Designed and constructed with high quality. Even with such bridges, the concrete members and steel members have deteriorated and been damaged due to long-term service.

On the other hand, the design method of structures has been reviewed along with the background of the times. Especially when the Hyogoken Nanbu Earthquake was experienced, the design method of concrete structures was greatly reviewed, and the above-mentioned road bridge specification also shows the design concept and The allowable stress, etc. has been significantly revised. As a result, even a bridge that was previously considered to have sufficient yield strength may not have sufficient yield strength according to the current design standards.

As described above, for the two reasons of aging concrete members and steel members and insufficient strength as a structure, reinforcement, repair, and renovation work of various structures including bridges are often performed at present. When repairing a bridge, renewal (replacement) work of floor slabs and main girders may be carried out. In this case, the existing members (floor slab, main girder, etc.) are removed, and for example, precast members are newly installed.

In order to remove the existing members of the bridge and newly install them, it is common to partially sequentially perform them due to restrictions on the amount of suspension load. In other words, instead of updating the entire bridge at once (removal to new construction), the bridge is divided in the direction of the bridge axis or in the direction perpendicular to the bridge axis, and the bridge is updated for each division area. In addition, only some of the bridges, such as ground covers, wall balustrades, guard fences, and administrative trails, may be damaged and other members may be sound. In this case as well, as a matter of course, the target member is partially removed and a new member is installed.

Normally, the partially removed member is temporarily lifted on the spot, but after that, it is moved to a predetermined position on the bridge surface (for example, on the deck slab), and then mounted on a transport vehicle such as a truck to go outside the venue. It is carried out. Various methods are conceivable for relocating the lifted removal member to a predetermined position on the bridge surface, and in fact, various methods have been proposed so far. For example, Patent Document 1 proposes a method of dismantling a bridge using a mobile work vehicle traveling on a rail, and further lifts a removal member with a lifting device provided in the mobile work vehicle and lifts the bridge in that state. We are proposing a method of moving the removal member together with the device in the direction of the bridge axis.

JP-A-2017-20290

Conventionally, when dismantling a bridge or partially removing a member, a crane installed outside the bridge, such as under a floor slab, has been used. Of course, if the environment is easy to install a crane, there is no particular problem with such crane work, but bridges over roads such as viaducts on the Tokyo Metropolitan Expressway, overpasses over railroad tracks, bridges over rivers, or In the case of a bridge with a significantly long girder such as a valley, it is not realistic to install a crane outside the bridge for construction. In that respect, the technique proposed in Patent Document 1 does not require a crane to be installed outside the bridge, and therefore can be adopted without problems even in bridges such as viaducts and overpasses on the Metropolitan Expressway.

However, the following problems can be pointed out with respect to the method of moving the lifted removal member in the bridge axis direction as in the technique proposed by Patent Document 1. That is, when removing members at the end of the bridge in the crossing direction (direction perpendicular to the bridge axis) such as the ground cover, wall deck, guard fence, and management walkway, the removed member lifted at the end is once centered on the bridge surface. It is possible to work smoothly by moving it to the vicinity (in the direction perpendicular to the bridge axis) and then mounting it on a truck or the like. There is a problem that the work (including the process of relocating to the vicinity of the upper center) cannot proceed.

The object of the present invention is to solve the problems of the prior art, that is, the removal member lifted at the end in the transverse direction is centered on the bridge surface (perpendicular to the bridge axis) without installing a crane outside the bridge. Direction) It is an object of the present invention to provide a suspended load moving device that can be relocated to the vicinity, a method of removing an existing bridge using the device, and a method of installing a bridge member.

In the present invention, a horizontal expansion / contraction means for expanding / contracting the horizontal span between two pulleys is used, and a suspension rope hung on one pulley is moved to the center side in the direction perpendicular to the bridge axis and gripped by the tip of the suspension rope. It was made by paying attention to the fact that the suspended load is also moved to the center side in the direction perpendicular to the bridge axis, and the invention was made based on an unprecedented idea.

The suspended load moving device of the present invention is a device installed on a bridge surface, and includes a horizontal telescopic means, a hanging rope, and a mobile fixing means. Of these, the horizontal expansion / contraction means is a means that includes a first pulley and a second pulley, and expands / contracts the horizontal span between the first pulley and the second pulley. Further, the hanging rope is hung on the first pulley and hangs downward, and is hung on the second pulley and hangs downward. The mobile fixing means is a means installed on the bridge surface. It is for fixing the first tip of the hanging rope. A hanging jig for gripping the suspended load is attached to the second tip of the hanging rope, and the mobile fixing means includes a support base and a moving body that moves horizontally on the support base. Further, the first tip of the hanging rope is attached to the moving body of the mobile fixing means. Then, when the horizontal span is shortened by the horizontal expansion / contraction means, the moving body moves to the center side in the direction perpendicular to the bridge axis, and the suspended load held by the suspension jig also moves to the center side in the direction perpendicular to the bridge axis.

The suspended load moving device of the present invention is configured such that the horizontal telescopic means includes a first upper arm and a second upper arm, a first lower arm and a second lower arm, and an upper and lower jack that expands and contracts up and down. You can also do it. The first upper arm and the second upper arm are hinged at the upper connecting portion, the first lower arm and the second lower arm are hinged at the lower connecting portion, and the first upper arm and the first lower arm are first. The second upper arm and the second lower arm are hinged at the side connecting portion, the second upper arm and the second lower arm are hinged at the second lateral connecting portion, and the first pulley is attached to the first lateral connecting portion and the second side is connected. A second pulley is attached to the connecting portion, and the upper and lower jacks expand and contract between the upper and lower hinges of the upper connecting portion and the lower connecting portion. Then, when the upper and lower spans are widened by the upper and lower jacks, the horizontal spans are contracted, and as a result, the suspended load moves to the center side in the direction perpendicular to the bridge axis.

The suspended load moving device of the present invention may be configured such that the horizontal telescopic means includes a first arm and a second arm, and a horizontal jack that expands and contracts left and right. The first arm and the second arm are hinged at the upper connecting portion, the first arm and the horizontal jack are hinged at the first lateral connecting portion, and the second arm and the horizontal jack are hinged at the second lateral connecting portion. It is hinged, and a first pulley is attached to the first lateral connecting portion, and a second pulley is attached to the second lateral connecting portion. Then, when the horizontal jack is contracted, the horizontal span is contracted, and as a result, the suspended load moves toward the center in the direction perpendicular to the bridge axis.

The suspended load moving device of the present invention may also use a horizontal jack in which the horizontal telescopic means expands and contracts left and right. A first pulley is attached to one end of the horizontal jack, and a second pulley is attached to the other end of the horizontal jack. Then, when the horizontal jack is contracted, the horizontal span is contracted, and as a result, the suspended load moves toward the center in the direction perpendicular to the bridge axis.

The suspended load moving device of the present invention shall be provided with an immovable fixing means (hereinafter, referred to as "immovable fixing means") that does not move the first tip of the hanging rope horizontally instead of the mobile fixing means. You can also. This immovable fixing means is installed on the bridge surface and is a means for fixing the first tip of the hanging rope. In this case, the link structure of the horizontal telescopic means is a "two-arm type" composed of two arms, and the horizontal telescopic means is rotatably fixed to a part of the support gantry. When the horizontal jack is contracted, the horizontal span is contracted and the horizontal expansion / contraction means is rotated, whereby the suspended load is moved to the center side in the direction perpendicular to the bridge axis.

The suspended load moving device of the present invention may be provided with a rotary frame instead of the horizontal telescopic means. This rotary frame includes a first pulley and a second pulley, and is formed by including a first arm, a second arm, and a third arm, and is rotatably fixed to a part of a support gantry. is there. The first arm and the second arm of the rotary frame are fixed by the upper connecting portion, the first arm and the third arm are fixed by the first lateral connecting portion, and the second arm and the third arm are fixed on the second side. It is fixed at the one-way connection part. Further, a first pulley is attached to the first lateral connecting portion of the rotary frame, a second pulley is attached to the second lateral connecting portion, and the first tip of the hanging rope is attached to the fixing means. Then, when the fixing of the first tip is released by the fixing means, the rotary frame rotates, whereby the suspended load moves to the center side in the direction perpendicular to the bridge axis.

The suspended load moving device of the present invention may also include a rotary frame and a rotary winding means installed on a support gantry. In this case, the first tip of the hanging rope hung on the first pulley is fixed to the rotary winding means. Then, when the rotary winding means winds the first tip of the hanging rope, the rotary frame rotates, whereby the suspended load moves to the center side in the direction perpendicular to the bridge axis.

The suspended load moving device of the present invention may also include a rotary frame and mobile fixing means. In this case, when the moving body is moved to the outside in the direction perpendicular to the bridge axis, the rotary frame is rotated, whereby the suspended load is moved to the center side in the direction perpendicular to the bridge axis.

The method for removing an existing bridge according to the present invention is a method for removing a part of an existing bridge by using a suspended load moving device, which includes a cutting step, a suspended load moving device installation step, a cutting member lifting step, and a cutting member moving step. It is a prepared method. Of these, in the cutting process, a part of the existing bridge is cut, and in the suspension load moving device installation process, the suspended load moving device is installed on the bridge surface. Further, in the cutting member lifting step, the cutting member is lifted by attaching a hanging jig to the cutting member generated in the cutting step and pulling up the second tip of the hanging rope, and in the cutting member moving step, the horizontal span is shortened by the horizontal expansion / contraction means. As a result, the cutting member gripped by the hanging jig is moved to the center side in the direction perpendicular to the bridge axis. Then, the cutting member moved to the center side in the direction perpendicular to the bridge axis is carried out by the carrier.

The method for removing the existing bridge of the present invention can also be a method of removing a part of the existing bridge by using a horizontal rotating device that horizontally rotates and moves the suspended load. In this case, instead of the suspended load moving device installation step, the suspended load moving device installation step of installing the horizontal rotating device on the bridge surface is performed. Further, in the cutting member moving step, the cutting member is moved to the center side in the direction perpendicular to the bridge axis by horizontally rotating the horizontal rotating device while the cutting member is lifted.

The method of installing the bridge member of the present invention is a method of installing a member to be newly installed using the suspended load moving device (hereinafter, referred to as "new member"), and is a method of installing the suspended load moving device and lifting the new member. This method includes a process and a process for moving new members. Of these, in the lifting load moving device installation process, the hanging load moving device is installed on the bridge surface, and in the new member lifting process, the hanging jig is attached to the new member and the second tip of the hanging rope is pulled up to lift the new member. In the process of moving the new member, the new member gripped by the suspension jig is moved in the direction perpendicular to the bridge axis by expanding and contracting the horizontal span by the horizontal expansion / contraction means. Then, a new member moved in the direction perpendicular to the bridge axis is installed at a predetermined position.

The suspended load moving device, the method of removing the existing bridge, and the method of installing the bridge member of the present invention have the following effects.
(1) Lift the members at the end of the bridge in the crossing direction (perpendicular to the bridge axis), such as the ground cover, wall railings, guard fences, and management walkways, and then lift the removed members in the crossing direction (in the suspended state). It can be relocated to near the center in the direction perpendicular to the bridge axis), and subsequent mounting work on trucks and the like can be carried out smoothly.
(2) Since it is not necessary to install a crane outside the bridge, it can be used without problems even for viaducts and overpasses on the Metropolitan Expressway, bridges that cross rivers, and bridges that have extremely long girders such as valleys.
(3) Since it is mainly composed of pulleys, hanging ropes, and jacks, it has a relatively simple structure, which can reduce construction and installation costs or maintenance costs, and even if it breaks down. It can be repaired relatively easily.

(A) is a cross-sectional view showing a bridge composed of a concrete slab with a wall balustrade installed on the main girder, and (b) is a cross-sectional view showing a state in which the cut wall balustrade is lifted. The side view which shows typically the suspended load moving apparatus of this invention. The perspective view which shows the lifter as an example of a support structure. (A) is a side view showing only a 4-arm type link structure with the support frame omitted, and (b) is a side view showing a link structure with the four arms omitted. (A) is a side view showing a 4-arm type link structure in a state where the upper and lower jacks are contracted, and (b) is a side view showing a 4-arm type link structure in a state where the upper and lower jacks are extended. (A) shows a side view showing a two-arm type link structure in which a horizontal jack that expands and contracts in the horizontal direction (horizontal direction) is extended, and (b) shows a two-arm type link structure in a state where the horizontal jack is contracted. Side view. (A) is a side view showing a state in which the horizontal jack is extended in a two-arm type link structure provided with a rotary winding means, and (b) is a two-arm type link structure provided with a rotary winding means. A side view showing a state in which the horizontal jack is contracted. (A) is a side view showing a state in which the horizontal jack is extended in a two-arm type link structure in which slits are provided in two arms, and (b) is a two-arm type in which slits are provided in two arms. A side view showing a state in which the horizontal jack is contracted in a link structure. (A) is a side view showing a state in which a horizontal jack is extended with a two-arm type link structure in which two arms are jacks, and (b) is a two-arm type link structure in which two arms are jacks. A side view showing a state in which the horizontal jack is contracted. (A) shows a side view showing a horizontal jack type link structure in which a horizontal jack that expands and contracts in the horizontal direction (horizontal direction) is extended, and (b) shows a horizontal jack type link structure in a state where the horizontal jack is contracted. Side view. (A) is a cross-sectional view showing a wheel type mobile fixing means, and (b) is a side view showing a wheel type mobile fixing means. (A) is a cross-sectional view showing a slide-type mobile fixing means, and (b) is a side view showing a slide-type mobile fixing means. (A) is a side view showing a second type of suspended load moving device in a state where the horizontal jack is extended, and (b) is a side view showing a second type of suspended load moving device in a state where the horizontal jack is contracted. (A) is a side view showing a third type of suspended load moving device in a state where the first tip side of the hanging rope is fixed to the immovable fixing means, and (b) is fixing of the first tip side of the hanging rope by the immovable fixing means. It is a side view which shows the suspended load moving apparatus of the 3rd form in the state which is released. (A) is a side view showing a fourth type of suspended load moving device in a state before the rotary winding means lifts the link structure, and (b) is a fourth state after the rotary winding means lifts the link structure. The side view which shows the suspended load moving device of a form. (A) is a side view showing a fifth type of suspended load moving device in a state before the mobile fixing means moves horizontally, and (b) is a state after the mobile fixing means moves to the outside in the direction perpendicular to the bridge axis. FIG. 5 is a side view showing a suspended load moving device of the fifth embodiment. The flow chart which shows the main process of the removal method of the existing bridge of this invention. (A) is a plan view showing a state in which a wall balustrade (suspended load) is lifted by a horizontal rotating device, and (b) is a plan view showing a state in which a horizontal rotating device is horizontally rotated while the wall balustrade is lifted. The flow chart which shows the main process of the installation method of the bridge member of this invention.

1. 1. Overall Overview FIG. 1 (a) is a cross-sectional view showing a bridge BR composed of a concrete plate bridge DC with a wall rail WR installed on the main girder GR, and FIG. 1 (b) is a cut wall rail WR. It is sectional drawing which shows the state which is lifted. Further, in FIG. 1B, the cut wall rail WR is lifted and moved in the direction perpendicular to the bridge axis to the vicinity of the center of the cross section (hereinafter, simply referred to as “the center of the cross section”). In the suspended load moving device of the present invention, as shown in FIG. 1 (b), a member obtained by cutting a part of a bridge such as a wall railing WR (hereinafter referred to as “cutting member”) is cut at the center of the cross section in a direction perpendicular to the bridge axis. It is a device that moves to. Further, the method of removing the existing bridge of the present invention is a method of moving a cutting member such as a wall railing WR to the center of the cross section in the direction perpendicular to the bridge axis by using the suspended load moving device of the present invention. The method of installing the members is a method of moving a new member such as a wall balustrade WR in a direction perpendicular to the bridge axis by using a suspended load moving device.

2. 2. Suspended load moving device The suspended load moving device of the present invention will be described with reference to the drawings. The method for removing the existing bridge of the present invention is a method of removing a part of the bridge using the suspended load moving device of the present invention. Therefore, the suspended load moving device of the present invention will be described first, and then the present application. The method of removing the existing bridge and the method of installing the bridge member of the present invention will be described. Further, for convenience, the example of moving the cut wall balustrade WR (cutting member) is described here, but the suspended load moving device of the present invention is used not only for moving the wall balustrade WR but also for moving various cutting members. can do.

FIG. 2 is a side view schematically showing the suspended load moving device 100 of the present invention. As shown in this figure, the suspended load moving device 100 is installed on the bridge surface (on the concrete deck DC in the figure), and includes the link structure 200 (horizontal expansion / contraction means) and the mobile fixing means 300. It is also configured to include a support gantry 400 that supports (hangs) the link structure 200.

The support deck 400 is installed on the bridge surface, the suspended load moving device 100 is suspended from the support deck 400, and the mobile fixing means 300 is fixed on the bridge surface. Further, the link structure 200 includes a hanging rope 240 such as a wire rope, one end of the hanging rope 240 (on the right side in FIG. 2) is fixed to the mobile fixing means 300, and the other end of the hanging rope 240 (in FIG. 2). A hanging jig 250 such as a hook is attached to the left side). The link structure 200 has a function of expanding and contracting in the direction perpendicular to the bridge axis (horizontal direction in FIG. 2), and the suspended load (suspended) held by the suspension jig 250 as the link structure 200 expands and contracts. In FIG. 2, the wall balustrade WR) moves in the direction perpendicular to the bridge axis. Further, the mobile fixing means 300 has a function of moving the suspension rope 240 in the direction perpendicular to the bridge axis while fixing one end of the suspension rope 240, and the suspension rope 240 is moved in the direction opposite to the suspension load as the link structure 200 expands and contracts. Move one end. Hereinafter, each of the main elements constituting the suspended load moving device 100 will be described in detail.

(Support gantry)
FIG. 3 is a perspective view showing a lifter as an example of the support gantry 400. The lifter is a general-purpose product that is distributed (sold and rented) on the market, and is composed of four columns 401 and a top plate 402 as shown in this figure. Each of these four columns 401 is formed of a plurality of (three in the figure) divided bodies, and the upper divided body has a structure capable of accommodating the lower divided body. Then, by using flood control or the like, the lower divided body can be taken in and out from the upper divided body, that is, the four columns 401 can be expanded and contracted up and down (that is, jack up and jack down). .. The lifter (support gantry 400) is gate-shaped when viewed from the front, and has a space through which construction vehicles can pass. The support gantry 400 is not limited to the lifter, and a specially manufactured one (made to order) can also be used.

(Link structure)
The link structure 200 is roughly divided into a "4-arm type" composed of 4 arms, a "2-arm type" composed of 2 arms, and a "horizontal jack type" composed of horizontal jacks. Can be done. Therefore, the link structure 200 will be described for each of these formats.

First, a 4-arm type link structure 200 will be described. 4A and 4B are views for explaining the 4-arm type link structure 200, FIG. 4A is a side view showing only the 4-arm type link structure 200 by omitting the support gantry 400, and FIG. 4B is a side view showing only the 4-arm type link structure 200. It is a side view which shows the link structure 200 which omitted.

As shown in FIG. 4A, the 4-arm type link structure 200 includes four arms forming a substantially parallelogram in a side view, and more specifically, a first upper arm 221 corresponding to the upper side of the parallelogram. It is provided with a second upper arm 222 (left side in the figure), a first lower arm 223 (right side in the figure) and a second lower arm 224 (left side in the figure) corresponding to the lower side of the parallelogram. The first upper arm 221 and the second upper arm 222 are hinged at the upper connecting portion, and the first lower arm 223 and the second lower arm 224 are hinged at the lower connecting portion, and similarly to the first upper arm 221. The first lower arm 223 is hinged at the first lateral connection (right side in the figure), and the second upper arm 222 and the second lower arm 224 are hinged at the second lateral connection (left side in the figure). There is.

Further, an upper and lower jack 231 that expands and contracts in the vertical direction is arranged between the upper connecting portion and the lower connecting portion, and the upper end of the upper and lower jack 231 is hinged at the upper connecting portion, and the lower end of the upper and lower jack 231 is It is hinged at the lower connection.

Further, as shown in FIG. 4A, the first pulley 211 is attached to the first lateral connecting portion, the second pulley 212 is attached to the second lateral connecting portion, and the upper connecting portion is attached to the second pulley 212. A third pulley 213 is attached. Then, as shown in FIG. 4B, the suspension rope 240 is stretched around the first pulley 211, the second pulley 212, and the third pulley 213. As described above, the tip of the hanging rope 240 (hereinafter, referred to as "first tip side 241") hung around the first pulley 211 and hanging downward is fixed to the mobile fixing means 300, and the second pulley A hanging jig 250 is attached to the tip of the hanging rope 240 (hereinafter, referred to as "second tip side 242") that is hung around the 212 and hangs downward. For convenience, here, the distance between the first pulley 211 and the second pulley 212 is referred to as "horizontal span WD" as shown in FIG. 4 (b).

FIG. 5A is a side view showing a 4-arm type link structure 200 in a state where the upper and lower jacks 231 are contracted, and FIG. 5B is a side view showing a 4-arm type link structure 200 in a state where the upper and lower jacks 231 are extended. It is a side view which shows 200. The 4-arm type link structure 200 shown in FIG. 5 is suspended by a support rope 262 hung on a locking tool 261, and the support rope 262 is fixed upward to the top plate 402 of the support gantry 400. ing. Comparing FIGS. 5 (a) and 5 (b), the extension of the upper and lower jacks 231 widens the span between the first upper arm 221 and the first lower arm 223, and the second upper arms 222 and the second. It can be seen that the angle between the lower arm 224 and the lower arm 224 is widened, and as a result, the first pulley 211 and the second pulley 212 move inward, respectively, and the horizontal span WD is shortened.

The operation of the 4-arm type link structure 200 will be described with reference to FIG. 4A. When the upper and lower jacks 231 in the contracted state are extended (arrow AR1), the space between the upper connecting portion and the lower connecting portion expands, and the first pulley 211 moves to the center side of the cross section (left side in the figure) (arrow AR2). 2 Pulley 212 moves to the center side of the cross section (right side in the figure) (arrow AR3), and the horizontal span WD shrinks. Along with this, the hanging rope 240 (first pulley 211 to first tip side 241) hanging from the first pulley 211 moves to the center side of the cross section (left side in the figure) (arrow AR4) and hangs from the second pulley 212. The hanging rope 240, that is, the hanging jig 250 and the wall railing WR of the suspended load move to the center side of the cross section (right side in the figure) (arrow AR5).

Next, the two-arm type link structure 200 will be described. 6A and 6B are views for explaining a 2-arm type link structure 200, and FIG. 6A is a side view showing a 2-arm type link structure 200 in a state where a horizontal jack 232 that expands and contracts in the horizontal direction (horizontal direction) is extended. (B) is a side view showing a two-arm type link structure 200 in a state where the horizontal jack 232 is contracted.

As shown in FIG. 6, the two-arm type link structure 200 includes two arms forming a substantially isosceles triangle in a side view and a horizontal jack 232, and more specifically, a first upper portion corresponding to a side side of the isosceles triangle. It includes an arm 221 (right side in the figure), a second upper arm 222 (left side in the figure), and a horizontal jack 232 that corresponds to the base of an isosceles triangle. The first upper arm 221 and the second upper arm 222 are hinged at the upper connecting portion, and similarly, the first upper arm 221 and the horizontal jack 232 are hinged at the first lateral connecting portion (right side in the figure). The second upper arm 222 and the horizontal jack 232 are hinged at the second lateral connecting portion (left side in the figure).

Further, as shown in FIG. 6, the first pulley 211 is attached to the first side connecting portion, the second pulley 212 is attached to the second side connecting portion, and the third pulley is attached to the upper connecting portion. 213 is attached. Then, as in the 4-arm type link structure 200 shown in FIG. 4 (b), the suspension rope 240 is stretched around the first pulley 211, the second pulley 212, and the third pulley 213, and the first pulley The first tip side 241 of the hanging rope 240 hung around the 211 and hung downward is fixed to the mobile fixing means 300, and the second tip of the hanging rope 240 hung around the second pulley 212 and hung downward. A hanging jig 250 is attached to the side 242.

The operation of the two-arm type link structure 200 will be described with reference to FIG. When the horizontal jack 232 is extended as shown in FIG. 6A and the horizontal jack 232 is contracted as shown in FIG. 6B, the first pulley 211 is on the center side of the cross section (left side in the drawing). The second pulley 212 moves to the center side of the cross section (on the right side in the figure) as it moves to, and as a result, the horizontal support WD shrinks. Along with this, the suspension rope 240 hanging from the first pulley 211 (first pulley 211 to the first tip side 241) moves to the center side of the cross section (left side in the figure), and the suspension rope 240 hanging from the second pulley 212, That is, the hanging jig 250 and the wall balustrade WR of the suspended load move to the center side of the cross section (right side in the figure).

As shown in FIG. 7, the two-arm type link structure 200 may be provided with a rotary winding means 263 such as a winch. FIG. 7A is a side view showing a state in which the horizontal jack 232 is extended in a two-arm type link structure 200 including the rotary winding means 263, and FIG. 7B is also provided with the rotary winding means 263. It is a side view which shows the state which the horizontal jack 232 is contracted in the 2 arm type link structure 200. In FIG. 7, the rotary winding means 263 is fixed to the top plate 402 of the support gantry 400, and the support rope 262 from the rotary winding means 263 is hung on the locking tool 261 to form a two-arm type link structure. 200 is supported (suspended).

When the horizontal jack 232 is extended as shown in FIG. 7 (a) and then the horizontal jack 232 is contracted as shown in FIG. 7 (b), the horizontal span WD is contracted. At this time, the rotary winding means 263 winds up the support rope 262 with the contraction of the horizontal jack 232, so that the third pulley 213 (upper connecting portion) is pulled upward by ΔH. As a result, even if the state of FIG. 7A (extended state of the horizontal jack 232) changes to the state of FIG. 7B (shortened state of the horizontal jack 232), the first pulley 211 (first lateral connection) The part) and the second pulley 212 (second side connecting part) are maintained at the same height, that is, the wall balustrade WR of the suspended load can be moved to the center side of the cross section while maintaining the same height. ..

Further, in the two-arm type link structure 200, as shown in FIG. 8, slit SL may be provided in the first upper arm 221 and the second upper arm 222. FIG. 8A is a side view showing a state in which the horizontal jack 232 is extended in a two-arm type link structure 200 in which slits SL are provided in the two arms, and FIG. 8B is also a side view showing a state in which the horizontal jack 232 is extended. It is a side view which shows the state which it is the 2 arm type link structure 200 provided with SL, and the horizontal jack 232 is contracted.

When the horizontal jack 232 is expanded as shown in FIG. 8A and the horizontal jack 232 is contracted as shown in FIG. 8B, the horizontal span WD is contracted. At this time, as the horizontal jack 232 contracts, the first lateral connecting portion rises along the slit of the first upper arm 221 and the second lateral connecting portion rises along the slit of the second upper arm 221. It is rising. As a result, even if the state of FIG. 8A (extended state of the horizontal jack 232) changes to the state of FIG. 8B (shortened state of the horizontal jack 232), the first pulley 211 and the second pulley 212 remain. The same height is maintained, that is, the wall rail WR of the suspended load can also be moved toward the center of the cross section while maintaining the same height.

Further, in the two-arm type link structure 200, as shown in FIG. 9, jacks may be used for the first upper arm 221 and the second upper arm 222. FIG. 9A is a side view showing a state in which the horizontal jack 232 is extended in a two-arm type link structure 200 in which two arms are jacks, and FIG. 9B is a side view showing a state in which the two arms are also jacks. It is a side view which shows the state in which the horizontal jack 232 is contracted in the arm type link structure 200.

The link structure 200 in which the two arms are jacks (that is, all three sides are jacks) is obtained by shrinking the horizontal jack 232 and shrinking the jack of the first upper arm 221 as shown in FIG. 9 (b). The horizontal span WD is shortened, and as a result, the first tip side 241 of the suspension rope 240 and the wall balustrade WR of the suspended load are moved to the center side of the cross section. In FIG. 9B, the jacks of the horizontal jack 232 and the first upper arm 221 are shrunk. Instead, the jacks of the horizontal jack 232 and the second upper arm 222 are shrunk to reduce the number of the hanging rope 240. 1 It is also possible to move the tip side 241 and the wall balustrade WR of the suspended load.

Subsequently, the horizontal jack type link structure 200 will be described. 10A and 10B are views for explaining a horizontal jack type link structure 200, and FIG. 10A is a side view showing a horizontal jack type link structure 200 in a state where a horizontal jack 232 that expands and contracts in the horizontal direction (horizontal direction) is extended. (B) is a side view showing a horizontal jack type link structure 200 in a state where the horizontal jack 232 is contracted.

As shown in FIG. 10, the horizontal jack type link structure 200 includes a horizontal jack 232 that expands and contracts in the horizontal direction (horizontal direction), and a first pulley 211 is attached to one end (right end in the figure) of the horizontal jack 232. The second pulley 212 is attached to the other end (left end in the figure) of the horizontal jack 232. Then, the suspension rope 240 is hung around the first pulley 211 and the second pulley 212 and stretched, and the first tip side 241 of the suspension rope 240 hung around the first pulley 211 and hangs downward is movable. A hanging jig 250 is attached to the second tip side 242 of the hanging rope 240 which is fixed to the fixing means 300 and hung around the second pulley 212 and hangs downward. The horizontal jack type link structure 200 shown in FIG. 10 is suspended by a support rope 262 hung on each of two locking tools 261 on the left and right, and the support rope 262 is located above the top of the support gantry 400. It is fixed to the plate 402.

The operation of the horizontal jack type link structure 200 will be described with reference to FIG. When the horizontal jack 232 is extended as shown in FIG. 10A and the horizontal jack 232 is contracted as shown in FIG. 10B, the first pulley 211 is on the center side of the cross section (left side in the drawing). The second pulley 212 moves to the center side of the cross section (on the right side in the figure) as it moves to, and as a result, the horizontal support WD shrinks. Along with this, the suspension rope 240 hanging from the first pulley 211 (first pulley 211 to the first tip side 241) moves to the center side of the cross section (left side in the figure), and the suspension rope 240 hanging from the second pulley 212, That is, the hanging jig 250 and the wall balustrade WR of the suspended load move to the center side of the cross section (right side in the figure).

(Mobile fixing means)
The mobile fixing means 300 can be roughly classified into a wheel type and a sliding type. First, the wheel-type mobile fixing means 300 will be described with reference to FIG. 11A and 11B are views showing a wheel-type mobile fixing means 300, in which FIG. 11A is a cross-sectional view thereof and FIG. 11B is a side view thereof. As shown in this figure, the wheel-type mobile fixing means 300 includes a rail 310 (support base) and a mobile vehicle 320 (moving body). In addition to the H-shaped steel shown in FIG. 11A, the rail 310 can use shaped steel such as angle steel and channel steel, and is arranged so that its axial direction is perpendicular to the bridge axis. Is fixed on the bridge surface (for example, concrete deck DC).

The moving vehicle 320 is provided with wheels 321 (2 × 2 = 4 in FIG. 11) on the left and right, and the wheels 321 rotate to smoothly move along the rail 310 (that is, in the direction perpendicular to the bridge axis). It has a structure that can be used. Further, the moving vehicle 320 is locked to a part of the rail 310 so as not to come off the rail 310. For example, in the figure, the flange of the rail 310 is sandwiched between the top plate of the moving vehicle 320 and the wheels 321 so that the moving vehicle 320 does not come off the rail 310 upward (or downward). Further, by providing stoppers 311 at the left and right ends of the rail 310, the structure can be configured so that the moving vehicle 320 does not come off in the left-right direction. Further, an insertion hole 322 is provided in the upper part of the moving vehicle 320, and the first tip side 241 of the suspension rope 240 is inserted into the insertion hole 322 and then fixed to the moving vehicle 320. By fixing the first tip side 241 of the suspension rope 240 to the moving vehicle 320 in this way, the first tip side 241 of the suspension rope 240 can smoothly move in the direction perpendicular to the bridge axis as the wheels 321 move. You can do it.

Next, the slide-type mobile fixing means 300 will be described with reference to FIG. 12A and 12B are views showing a slide-type mobile fixing means 300, in which FIG. 12A is a cross-sectional view thereof and FIG. 12B is a side view thereof. As shown in this figure, the slide-type mobile fixing means 300 includes two rails 310 (support bases) and slide rods 330 (moving bodies) arranged substantially in parallel. In addition to the H-shaped steel shown in FIG. 12A, the rail 310 can use shaped steel such as angle steel and channel steel, and is arranged so that its axial direction is perpendicular to the bridge axis, such as an anchor AN. Is fixed on the bridge surface (for example, concrete deck DC). Further, a moving groove 312 is provided near the center of the abdominal plate (web) of the rail 310 along the direction perpendicular to the bridge axis.

As the slide rod 330, a rod-shaped steel material such as round steel can be used, and both ends thereof are inserted into the moving grooves 312 of the two rails 310. Then, the slide rod 330 is guided through the moving groove 312 so that the slide rod 330 can smoothly move in the direction perpendicular to the bridge axis. Further, the first tip side 241 of the suspension rope 240 is fixed to the slide rod 330, so that the first tip side 241 of the suspension rope 240 also smoothly moves in the direction perpendicular to the bridge axis as the slide rod 330 moves. Can be done.

(Other forms of suspended load moving device)
Hereinafter, a suspended load moving device 100 having a form different from the suspended load moving device 100 of the form described with reference to FIGS. 1 to 12 (hereinafter, referred to as “the suspended load moving device 100 of the first form”) will be described. ..

The suspended load moving device 100 of the present invention may be provided with the immovable fixing means 500 instead of the mobile fixing means 300. FIG. 13 is a side view illustrating the operation of the suspended load moving device 100 (hereinafter, referred to as “second form suspended load moving device 100”) provided with the immovable fixing means 500 instead of the mobile fixing means 300. , (A) shows a side view showing the second form of the suspended load moving device 100 in the state where the horizontal jack 232 is extended, and (b) shows the second form of the suspended load moving device 100 in the state where the horizontal jack 232 is contracted. It is a side view.

Like the mobile fixing means 300, the immovable fixing means 500 is a means for fixing the first tip side 241 of the suspension rope 240 by being fixed on the bridge surface (for example, concrete deck DC) by an anchor AN or the like. However, unlike the mobile fixing means 300 shown in FIGS. 11 and 12, it does not have a function of horizontally moving the first tip side 241 of the hanging rope 240.

As shown in FIG. 13, the link structure 200 of the suspended load moving device 100 of the second form is a “two-arm type” composed of two arms. Further, the suspended load moving device 100 of the second form is rotatably fixed to a part of the support gantry 400 (for example, the top plate 402). Specifically, the link structure 200 is fixed to the support gantry 400 in the vicinity of the upper connecting portion (the portion shown by the broken line circle in FIG. 13A, hereinafter referred to as “apex CU”), and the link structure 200. Is fixed so that it can rotate in a substantially vertical plane (including a vertical plane) around this apex CU.

When the horizontal jack 232 is extended as shown in FIG. 13 (a) and the horizontal jack 232 is contracted as shown in FIG. 13 (b), the horizontal span WD is contracted. At this time, as the horizontal jack 232 contracts, the link structure 200 rotates (rotates counterclockwise in the figure) around the apex CU. As a result, as shown in FIG. 13B, the wall railing WR of the suspended load moves toward the center of the cross section.

The suspended load moving device 100 of the present invention may be provided with a rotary frame 600 instead of the link structure 200. FIG. 14 is a side view illustrating the operation of the suspended load moving device 100 (hereinafter, referred to as “the third form of suspended load moving device 100”) provided with the rotary frame 600 instead of the link structure 200. a) is a side view showing a third form of the suspended load moving device 100 in a state where the first tip side 241 of the suspended rope 240 is fixed to the immovable fixing means 500, and (b) is a side view of the suspended rope 240 by the immovable fixing means 500. It is a side view which shows the suspended load moving apparatus 100 of the 3rd form in the state which the fixing of the 1st tip side 241 is released. As shown in this figure, the suspended load moving device 100 of the third form includes the immovable fixing means 500 like the suspended load moving device 100 of the second form, and the first tip side 241 of the hanging rope 240 is immovably fixed. It is fixed to the means 500.

As shown in FIG. 14, the rotary frame 600 is arranged in an inclined first arm (right side in the figure), a second arm in the same inclined arrangement (left side in the figure), and substantially horizontal (including horizontal). It is a frame structure formed so that the front view becomes a triangle by the third arm. Specifically, the first arm and the second arm are fixed by the upper connecting portion, the first arm and the third arm are fixed by the first lateral connecting portion, and the second arm and the third arm are fixed to the second side. The rotary frame 600 is formed by being fixed at the connecting portion. However, the first arm, the second arm, and the third arm may be connected by a fixing method that restrains rotation, instead of hinge connection as in the link structure 200 of the suspended load moving device 100 of the first form.

Further, the rotary frame 600 is rotatably fixed to a part of the support gantry 400 (for example, the top plate 402) like the link structure 200 of the suspended load moving device 100 of the first form. That is, the rotary frame 600 is fixed to the support gantry 400 at the apex CU near the upper connecting portion, and the rotary frame 600 can rotate in a substantially vertical plane (including the vertical plane) around the apex CU. It is fixed.

From the state where the first tip side 241 of the suspension rope 240 is fixed to the immovable fixing means 500 as shown in FIG. 14 (a), the first tip side 241 by the immovable fixing means 500 is fixed as shown in FIG. 14 (b). When the fixing is released, the rotary frame 600 rotates (rotates counterclockwise in the figure) around the apex CU. As a result, as shown in FIG. 14B, the wall railing WR of the suspended load moves toward the center of the cross section.

The suspended load moving device 100 of the present invention may also include a rotary frame 600 and a rotary winding means WN. FIG. 15 is a side view illustrating the operation of the suspended load moving device 100 (hereinafter, referred to as “fourth form suspended load moving device 100”) including the rotary frame 600 and the rotary winding means WN. a) is a side view showing the suspended load moving device 100 of the fourth form before the rotary winding means WN lifts the link structure 200, and (b) is a side view after the rotary winding means WN lifts the link structure 200. It is a side view which shows the suspended load moving apparatus 100 of the 4th form of a state. As shown in this figure, the suspended load moving device 100 of the fourth form includes the immovable fixing means 500 like the suspended load moving device 100 of the third form, and the first tip side 241 of the hanging rope 240 is immovably fixed. It is fixed to the means 500.

The rotary frame 600 is rotatably fixed to a part of the support gantry 400 (for example, the top plate 402) like the suspended load moving device 100 of the third form. Further, the rotary winding means WN is fixed to a part of the support gantry 400 (for example, the top plate 402), and the first tip of the hanging rope hung on the first pulley 211 is fixed to the rotary winding means WN. Rope.

From the state before the rotary winding means WN lifts the first tip side 241 of the suspension rope 240 as shown in FIG. 15 (a), the rotary winding means WN is on the first tip side as shown in FIG. 15 (b). When the 241 is lifted, that is, the first pulley 211 is pulled up, the rotary frame 600 rotates (rotates counterclockwise in the figure) around the apex CU. As a result, as shown in FIG. 15B, the wall railing WR of the suspended load moves toward the center of the cross section.

The suspended load moving device 100 of the present invention may also include a rotary frame 600 and a mobile fixing means 300. FIG. 16 is a side view for explaining the operation of the suspended load moving device 100 (hereinafter, referred to as “the suspended load moving device 100 of the fifth form”) including the rotary frame 600 and the mobile fixing means 300. a) is a side view showing the suspended load moving device 100 of the fifth form before the mobile fixing means 300 (moving vehicle 320) horizontally moves, and (b) is the mobile fixing means 300 (moving vehicle 320). It is a side view which shows the suspended load moving apparatus 100 of the 5th form after moving to the outside in the direction perpendicular to the bridge axis. As shown in this figure, the suspended load moving device 100 of the fifth form includes the mobile fixing means 300 like the suspended load moving device 100 of the first form, and the first tip side 241 of the hanging rope 240 moves. It is fixed to the moving vehicle 320 of the type fixing means 300. Further, the rotary frame 600 is rotatably fixed to a part of the support gantry 400 (for example, the top plate 402) like the suspended load moving device 100 of the third form.

From the state before the moving vehicle 320 of the mobile fixing means 300 horizontally moves as shown in FIG. 16A, the moving vehicle 320 is outside in the direction perpendicular to the bridge axis as shown in FIG. 16B (right side in the figure). ), The rotary frame 600 rotates around the apex CU (rotates counterclockwise in the figure). As a result, as shown in FIG. 16B, the wall railing WR of the suspended load moves toward the center of the cross section.

3. 3. Method for Removing an Existing Bridge Next, a method for removing an existing bridge according to the present invention will be described with reference to the drawings. The method of removing the existing bridge of the present invention is a method of removing a part of the bridge by using the suspended load moving device 100 described so far, and therefore overlaps with the contents described in the suspended load moving device 100. The explanation will be omitted, and only the contents peculiar to the method of removing the existing bridge of the present invention will be explained. That is, the contents not described here are the same as those described in "2. Suspended load moving device".

FIG. 17 is a flow chart showing the main steps of the method for removing the existing bridge of the present invention. As shown in this figure, first, a part of the bridge BR (for example, the wall railing WR) is cut (Step 10). On the other hand, the suspended load moving device 100 of the present invention is installed (Step 20) on a bridge surface (for example, concrete deck DC) having substantially the same cross section as the wall balustrade WR to be cut, and the second tip side of the suspended rope 240 is installed. The hanging jig 250 attached to the 242 connects (holds) the cut wall balustrade WR, and lifts the wall balustrade WR (suspended load) with a lifting machine such as a winch (Step 30).

When the wall balustrade WR (suspended load) is lifted, the horizontal span WD (distance between the first pulley 211 and the second pulley 212) is shortened by using the link structure 200, and the hanging rope 240 hanging from the first pulley 211 and The hanging rope 240 hanging from the second pulley 212, that is, the hanging jig 250 and the wall balustrade WR (suspended load) are moved toward the center of the cross section (Step 40). Then, the wall balustrade WR is mounted on a transport body such as a truck near the center of the concrete floor slab DC, and carried out to a predetermined place outside the site (Step 50).

As shown in FIG. 18, the method of removing the existing bridge of the present invention can also be a method of removing a part of the bridge BR (for example, the wall railing WR) by using the horizontal rotating device 700. The horizontal rotation device 700 horizontally rotates and moves the suspended load. In this case as well, first, a part of the bridge BR (for example, the wall railing WR) is cut (Step 10 in FIG. 17). On the other hand, the horizontal rotation device 700 is installed on the bridge surface (for example, concrete deck slab DC) having substantially the same cross section as the wall railing WR to be cut. Then, as shown in FIG. 18A, the wall rail WR (suspended load) is lifted by the horizontal rotating device 700.

When the wall balustrade WR (suspended load) is lifted by the horizontal rotary device 700, as shown in FIG. 18B, the horizontal rotary device 700 is horizontally rotated with the wall balustrade WR lifted, and the wall balustrade WR is perpendicular to the bridge axis. Move to the center side of the direction. At this time, the horizontal rotating device 700 may be rotated horizontally by the worker pulling the wire rope attached to the wall balustrade WR. Then, the wall balustrade WR is mounted on a transport body such as a truck near the center of the concrete floor slab DC, and carried out to a predetermined place outside the site (Step 50 in FIG. 17).

4. Method of Installing Bridge Member Next, the method of installing the bridge member of the present invention will be described with reference to FIG. The method of installing the bridge member of the present invention is the same as the method of removing the existing bridge, which is a method of installing a new member of the bridge by using the suspended load moving device 100 described so far. Therefore, the suspended load moving device 100 And the explanation that overlaps with the contents explained in the method of removing the existing bridge will be avoided, and only the contents peculiar to the installation method of the bridge member of the present invention will be explained. That is, the contents not described here are the same as those described in "2. Suspended load moving device" and "3. Method of removing the existing bridge".

FIG. 19 is a flow chart showing a main process of the method of installing the bridge member of the present invention. First, as shown in this figure, the suspended load moving device of the present invention is placed on a bridge surface (for example, a concrete deck slab DC) having substantially the same cross section as a new member of a bridge to be newly installed (for example, wall railing WR). 100 is installed (Step 20). Then, the wall balustrade WR (new member) carried into the hall is connected (held) by the hanging jig 250 attached to the second tip side 242 of the hanging rope 240 of the hanging load moving device 100, and a winch or the like is used. This wall balustrade WR (new member) is lifted by a lifting machine (Step 60).

When the wall balustrade WR is lifted, the wall balustrade WR is moved to a position planned in advance in the direction perpendicular to the bridge axis (Step 40). Specifically, the hanging rope 240 hanging from the first pulley 211 and the second pulley 212 by shortening the horizontal span WD (distance between the first pulley 211 and the second pulley 212) using the link structure 200. The hanging rope 240 hanging from the hanging jig 250, that is, the hanging jig 250 and the wall rail WR are moved to the center side of the cross section. Alternatively, the hanging jig 250 and the wall balustrade WR are moved to the outside of the cross section by extending the horizontal span WD using the link structure 200. Then, the wall railing WR that has moved to the planned position is installed at a predetermined position (Step 40).

The suspended load moving device, the method of removing the existing bridge, and the method of installing the bridge member of the present invention can be used for bridges for all purposes such as road bridges, railway bridges, and pipeline bridges, and various bridges such as river bridges, overpass bridges, and overpasses. It can be used for bridges that cross things. Further, it can be used not only in the case of removing the member of the existing bridge but also in the case of installing a new member. Considering that the invention of the present application can extend the life of a bridge as social capital (infrastructure), it can be said that the invention can be used not only industrially but also can be expected to make a great contribution to society.

100 Suspended load moving device 200 (of suspended load moving device) Link structure 211 (of link structure) 1st pulley 212 (of link structure) 2nd pulley 213 (of link structure) 3rd pulley 221 (of link structure) 1st Upper arm 222 (link structure) 2nd upper arm 223 (link structure) 1st lower arm 224 (link structure) 2nd lower arm 231 (link structure) upper and lower jack 232 (link structure) horizontal jack 240 (link structure) Suspended rope 241 (of hanging rope) 1st tip side (of hanging rope) 242 (of hanging rope) 2nd tip side 250 (link structure) hanging jig 261 (link structure) locking tool 262 (link structure) support Rope 263 (link structure) rotary winding means 300 (for suspended load moving device) mobile fixing means 310 (for mobile fixing means) rail 311 (for rail) stopper 312 (for rail) moving groove 320 (movable fixing) Moving vehicle (of means) 321 (moving vehicle) wheel 322 (moving vehicle) insertion hole 330 (moving vehicle) slide rod 400 (suspended load moving device) support gantry 401 (supporting gantry) support 402 (support) Top plate 500 (of suspended load moving device) Immovable fixing means 600 (for suspended load moving device) Rotating frame 700 Horizontal rotating device BR Bridge CU Top DC Concrete floor slab GR Main girder SL slit WN Rotating winding means WR wall rope

Claims (11)

A suspended load moving device that is installed on the bridge surface and moves the suspended load horizontally.
A horizontal expansion / contraction means that includes a first pulley and a second pulley and expands / contracts a horizontal span between the first pulley and the second pulley.
A hanging rope that is hung on the first pulley and hangs downward, and is hung on the second pulley and hangs downward.
It is equipped with a mobile fixing means that is installed on the bridge surface and fixes the first tip of the hanging rope.
A hanging jig for gripping the suspended load is attached to the second tip of the suspended rope.
The mobile fixing means includes a support base and a moving body that moves horizontally on the support base.
The first tip is attached to the moving body of the mobile fixing means.
When the horizontal span is shortened by the horizontal expansion / contraction means, the moving body moves to the center side in the direction perpendicular to the bridge axis, and the suspended load held by the suspension jig moves to the center side in the direction perpendicular to the bridge axis.
A suspended load moving device characterized by this. The horizontal telescopic means includes a first upper arm and a second upper arm, a first lower arm and a second lower arm, and a vertical jack that expands and contracts up and down.
The first upper arm and the second upper arm are hinged at the upper connecting portion.
The first lower arm and the second lower arm are hinged at a lower connecting portion.
The first upper arm and the first lower arm are hinged at the first lateral connecting portion.
The second upper arm and the second lower arm are hinged at a second lateral connecting portion.
The first pulley is attached to the first lateral connecting portion, and the second pulley is attached to the second lateral connecting portion.
The upper and lower jacks expand and contract between the upper and lower spans of the upper connecting portion and the lower connecting portion.
When the upper and lower spans are widened by the upper and lower jacks, the horizontal spans are contracted and the suspended load moves toward the center in the direction perpendicular to the bridge axis.
The suspended load moving device according to claim 1. The horizontal telescopic means has a first arm and a second arm, and a horizontal jack that expands and contracts left and right.
The first arm and the second arm are hinged at the upper connecting portion, and the first arm and the second arm are hinged to each other.
The first arm and the horizontal jack are hinged at the first lateral connecting portion.
The second arm and the horizontal jack are hinged at the second lateral connecting portion.
The first pulley is attached to the first lateral connecting portion, and the second pulley is attached to the second lateral connecting portion.
When the horizontal jack is contracted, the horizontal span is contracted, and the suspended load moves toward the center in the direction perpendicular to the bridge axis.
The suspended load moving device according to claim 1. The horizontal telescopic means has a horizontal jack that expands and contracts left and right.
The first pulley is attached to one end of the horizontal jack, and the second pulley is attached to the other end of the horizontal jack.
When the horizontal jack is contracted, the horizontal span is contracted, and the suspended load moves toward the center in the direction perpendicular to the bridge axis.
The suspended load moving device according to claim 1. A suspended load moving device that is installed on the bridge surface and moves the suspended load horizontally.
A horizontal expansion / contraction means that includes a first pulley and a second pulley and expands / contracts a horizontal span between the first pulley and the second pulley.
A support deck installed on the bridge surface to suspend and support the horizontal telescopic means,
A hanging rope that is hung on the first pulley and hangs downward, and is hung on the second pulley and hangs downward.
It is installed on the bridge surface and is provided with a fixing means for fixing the first tip of the hanging rope.
The horizontal telescopic means has a first arm and a second arm, and a horizontal jack that expands and contracts left and right.
The first arm and the second arm are hinged at the upper connecting portion, and the first arm and the second arm are hinged to each other.
The first arm and the horizontal jack are hinged at the first lateral connecting portion.
The second arm and the horizontal jack are hinged at the second lateral connecting portion.
The first pulley is attached to the first lateral connecting portion, and the second pulley is attached to the second lateral connecting portion.
The horizontal telescopic means is rotatably fixed to a part of the support gantry and fixed.
A hanging jig for gripping the suspended load is attached to the second tip of the suspended rope.
The first tip is attached to the fixing means,
When the horizontal jack is contracted, the horizontal span is contracted, and the horizontal expansion / contraction means rotates, so that the suspended load moves toward the center in the direction perpendicular to the bridge axis.
A suspended load moving device characterized by this. A suspended load moving device that is installed on the bridge surface and moves the suspended load horizontally.
A rotary frame including a first pulley and a second pulley, and a first arm, a second arm, and a third arm.
A support deck installed on the bridge surface to suspend and support the rotary frame,
A hanging rope that is hung on the first pulley and hangs downward, and is hung on the second pulley and hangs downward.
It is installed on the bridge surface and is provided with a fixing means for fixing the first tip of the hanging rope.
The first arm and the second arm are fixed by an upper connecting portion, and are fixed.
The first arm and the third arm are fixed by the first lateral connecting portion.
The second arm and the third arm are fixed by a second lateral connecting portion.
The first pulley is attached to the first lateral connecting portion, and the second pulley is attached to the second lateral connecting portion.
The rotary frame is rotatably fixed to a part of the support gantry.
A hanging jig for gripping the suspended load is attached to the second tip of the suspended rope.
The first tip is attached to the fixing means,
When the fixing of the first tip is released by the fixing means, the rotary frame rotates, so that the suspended load moves to the center side in the direction perpendicular to the bridge axis.
A suspended load moving device characterized by this. A suspended load moving device that is installed on the bridge surface and moves the suspended load horizontally.
A rotary frame including a first pulley and a second pulley, and a first arm, a second arm, and a third arm.
A support deck installed on the bridge surface to suspend and support the rotary frame,
The rotary winding means installed on the support gantry and
It is provided with a hanging rope that is hung on the first pulley and fixed to the rotary winding means, and is hung on the second pulley and hangs downward.
The first arm and the second arm are fixed by an upper connecting portion, and are fixed.
The first arm and the third arm are fixed by the first lateral connecting portion.
The second arm and the third arm are fixed by a second lateral connecting portion.
The first pulley is attached to the first lateral connecting portion, and the second pulley is attached to the second lateral connecting portion.
The rotary frame is rotatably fixed to a part of the support gantry.
A hanging jig for gripping the suspended load is attached to the second tip of the suspended rope.
When the rotary winding means winds the first tip of the hanging rope hung around the first pulley, the rotary frame rotates so that the suspended load is moved to the center side in the direction perpendicular to the bridge axis. Moving,
A suspended load moving device characterized by this. A suspended load moving device that is installed on the bridge surface and moves the suspended load horizontally.
A rotary frame including a first pulley and a second pulley, and a first arm, a second arm, and a third arm.
A support deck installed on the bridge surface to suspend and support the rotary frame,
A hanging rope that is hung on the first pulley and hangs downward, and is hung on the second pulley and hangs downward.
It is equipped with a mobile fixing means that is installed on the bridge surface and fixes the first tip of the hanging rope.
The first arm and the second arm are fixed by an upper connecting portion, and are fixed.
The first arm and the third arm are fixed by the first lateral connecting portion.
The second arm and the third arm are fixed by a second lateral connecting portion.
The first pulley is attached to the first lateral connecting portion, and the second pulley is attached to the second lateral connecting portion.
The rotary frame is rotatably fixed to a part of the support gantry.
A hanging jig for gripping the suspended load is attached to the second tip of the suspended rope.
The mobile fixing means includes a support base and a moving body that moves horizontally on the support base.
The first tip is attached to the moving body of the mobile fixing means.
When the moving body moves to the outside in the direction perpendicular to the bridge axis, the rotary frame rotates, so that the suspended load moves to the center side in the direction perpendicular to the bridge axis.
A suspended load moving device characterized by this. A method of removing a part of an existing bridge by using the suspended load moving device according to any one of claims 1 to 8.
A cutting process that cuts a part of an existing bridge,
The suspension load moving device installation process for installing the suspended load moving device on the bridge surface, and
A cutting member lifting step of attaching the hanging jig to the cutting member generated in the cutting step and lifting the cutting member by pulling up the second tip of the hanging rope.
A cutting member moving step of moving the cutting member gripped by the hanging jig to the center side in the direction perpendicular to the bridge axis by shrinking the horizontal span by the horizontal expansion / contraction means is provided.
The cutting member that has moved to the center side in the direction perpendicular to the bridge axis is carried out by the carrier.
A method of removing an existing bridge, which is characterized by this. This is a method of removing a part of an existing bridge using a horizontal rotation device that moves the suspended load horizontally.
A cutting process that cuts a part of an existing bridge,
The horizontal rotating device installation process for installing the horizontal rotating device on the bridge surface, and
The cutting member lifting step of lifting the cutting member generated in the cutting step by the horizontal rotating device, and
A cutting member moving step of moving the cutting member to the center side in the direction perpendicular to the bridge axis by horizontally rotating the horizontal rotating device in a state where the cutting member is lifted is provided.
The cutting member that has moved to the center side in the direction perpendicular to the bridge axis is carried out by the carrier.
A method of removing an existing bridge, which is characterized by this. A method of installing a part of an existing bridge by using the suspended load moving device according to any one of claims 1 to 8.
The suspension load moving device installation process for installing the suspended load moving device on the bridge surface, and
A new member lifting process in which the hanging jig is attached to a newly installed new member and the new member is lifted by pulling up the second tip of the hanging rope.
A new member moving step of moving the new member gripped by the hanging jig in the direction perpendicular to the bridge axis by expanding and contracting the horizontal span by the horizontal expansion / contraction means is provided.
The new member moved in the direction perpendicular to the bridge axis is installed at a predetermined position.
A method of installing bridge members, which is characterized by this.

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