JP6476426B2 - Member renewal method using lifting device - Google Patents

Description

  The present invention is a technology related to the repair of members such as floor slabs and girders (hereinafter simply referred to as “components”) that constitute a road bridge. More specifically, the present invention is basically set using one lane. The present invention relates to a lifting device suitable for updating a component member within a construction yard, and a member updating method using the lifting device.

  It has been pointed out that the construction infrastructure (hereinafter referred to as “construction infrastructure”) that has been intensively developed during the period of high economic growth has already undergone considerable deterioration. In 2014, the “Proposal for Full-scale Implementation of Road Aging Measures (Social Capital Development Council)” was compiled, giving examples of the Choshi Tunnel in 2012, “In the near future, human life and society such as the collapse of bridges, etc.” It will lead to a fatal situation related to the equipment, "he urged and emphasized the importance of maintaining construction infrastructure.

  Against this backdrop, the government promulgated a ministerial ordinance to revise a part of the Road Law Enforcement Regulations, and showed a specific method for inspecting construction infrastructure, points of major deformations, pictures of judgment cases, etc. The inspection procedure is formulated. This periodic inspection procedure covers bridges with a length of 2.0 m or more, which is said to be about 700,000 bridges. The first inspection is performed within 2 years after the start of service, and then the periodic inspection is performed once every 5 years thereafter. I am going to do that.

  On the other hand, the “Road Bridge Specification”, which is the standard for designing road bridges, has been reviewed from time to time since the publication of the 14th year edition, especially after the Hyogoken-Nanbu Earthquake. ing. As a result, even in the case of a bridge that has been sufficiently proof in the past, the proof strength is often insufficient in light of the current design standards.

  Thus, for the two reasons of aging and lack of strength, reinforcement and reconstruction of bridges are often performed today. However, the current road bridge secures a large amount of traffic, that is, it supports the movement of people and the distribution industry, and its service cannot be stopped easily. Especially, viaducts on motorways such as expressways pass tens of thousands of cars a day, and if they are not allowed to pass, the economic loss will be immeasurable, and emergency patients will be lost. If it cannot be transported, it may become a social problem.

  Therefore, when constructing road bridges that are in service, there are many road managers who want to conduct traffic restrictions at night in order to ensure at least daytime traffic. In addition, in the case of a road bridge with two upper and lower lanes, it is general that the two downward lanes are opened as alternate traffic (upper and lower lanes) and the construction is performed using one of the two upward lanes. In recent years, however, there are more cases where it is required to open the lane, and the two down lanes are fully open, and one of the two up lanes is always open, and the construction is requested only in the remaining one up lane. Sometimes it is done. That is, under the strictest conditions, only one lane of the upper and lower four lanes must be restricted, and one lane must be opened during the daytime (that is, construction only at night).

  Opening adjacent lanes and restricting only the remaining one lane requires a variety of ingenuity due to various restrictions. For example, in Patent Document 1, one lane of up (or down) two lanes is a primary construction section, and the other lane is a secondary construction section. We propose a method to replace And in order to enable construction in one lane, a construction device will be installed. This erection device is composed of a pair of gate-shaped leg portions arranged at intervals and a track beam portion spanned between them, and a suspension means for gripping a concrete floor slab etc. is provided on the track beam portion. Is to move.

Japanese Patent Laid-Open No. 2006-98489

  By the way, when only one lane is restricted and a road bridge component (such as a floor slab or girder) is updated, the component to be removed (hereinafter referred to as “removal member”) or a newly installed component ( In the following, it can be pointed out that the lifting equipment for lifting the "new member") becomes larger. FIG. 12 shows a road bridge with two lanes in both the upper and lower sides, and one of the two lanes (upward in the figure) is opened to the public while the other lane (lower in the figure) is restricted to perform the construction. It is a top view which shows a condition. In this figure, a predetermined section of one lane on the construction side is set as a construction area (hereinafter referred to as “construction yard”), and this construction yard is indicated by a broken line. Of course, the construction yard is set so as to include a range in which the component members are updated (hereinafter referred to as “construction section”).

  In order to lift floor slabs and girders for rehabilitation of road bridges, it is common to use a lifting machine CR such as a truck crane or a rafter crane because it is easy to transport and does not require assembly. In FIG. 12, existing components are removed from the starting side in the construction section. In FIG. 12 (a), the removing member on the most starting side is mounted on the cargo truck Tr by the lifting machine CR, and FIG. Then, the removal member on the most end side is mounted on the lorry Tr with heavy equipment CR. As can be seen from this figure, when the removal member on the most starting side is mounted, the lifting machine CR can approach the lorry Tr so that the working radius is relatively small, but the removal member on the most end side is required. When installed, there is a section that has already been removed, and the lifting machine CR cannot approach the lorry Tr. Therefore, the lifting machine CR has a relatively large working radius. That is, in order to perform the construction as shown in FIG. 12, a large-scale lifting machine CR is required. If the scale of the lifting machine CR becomes large, self-propelling becomes difficult, so the carrying-in becomes large and assembly is required, resulting in an increase in cost by the time and effort required for this.

  The problem of the present invention is to solve the problems of the prior art, that is, lifting work that can basically be carried out for road bridge repair work with only one lane restriction without requiring a large-scale lift CR. It is providing a heavy apparatus and a member update method using the same.

  The present invention has been made based on the idea that a new lifting device is constructed by using a lifter provided in the market, and is based on an unprecedented idea. .

  The lifting device (winch type lifting device) of the present invention lifts and suspends a removal member (a component obtained by removing a part of a road bridge) or a new member (a component newly installed on a part of a road bridge). It is a device and is equipped with a lifter, a construction girder, and a suspended load mechanism. The lifter supports the load including the removal member and the newly installed member, and includes four support columns that can be vertically expanded and contracted, and a traffic space (a space through which the lorry can pass) in these support columns. It is what has. The hanging load mechanism has a hanging rope, a hanging jig fixed to the tip of the hanging rope, and a power means that can lift and lower the hanging jig while supporting the load. Then, by lifting (or unwinding) the suspension rope with the power means, the suspension jig is moved up and down, and the removal member or the newly installed member held by the suspension jig is suspended (or suspended). Therefore, the lifting function is provided by a lifter and by a suspended load mechanism and functions independently.

  The lifting device (installed girder type lifting device) of the present invention is a device that lifts and suspends a removal member or a newly installed member, and includes a lifter, a built-up girder, and a suspended load mechanism. The lifter is configured to include four struts that can support a load including a removal member and a new member and can be vertically expanded and contracted, and a gantry coupled to the upper portions of the four struts, and has a passage space. Is. In addition, the installation girders are fixed to two or more lifter gantry and spanned between the lifters, and the hanging load mechanism includes a suspension rope and a suspension jig (generally a hook or the like) fixed to the tip of the suspension rope. And a power means capable of supporting the load and raising and lowering the lifting jig. The suspended load mechanism is attached to the erection girder so that it can traverse. Therefore, the lifting function is provided by a lifter and by a suspended load mechanism and functions independently.

  The lifting device of the present invention can include a lifter having two connecting beams. Two of the four columns are connected by one connecting beam, and the two connecting beams can be expanded and contracted to the left and right.

  The “member updating method using a lifting device” according to the present invention is an erection type lifting device installed in a construction yard that is a predetermined section set using a part of a road bridge (for example, one lane). It is a method of updating the structural member of the construction section using the method, and is a method comprising a removal process and a removal member loading process. The lifting device is installed so that a construction girder is arranged above the construction section. In the removal process, the components of the road bridge cut in advance in the construction section are removed from the road bridge body by lifting the lifting mechanism or lifting the lifter. In the removal member loading process, the removal member is lifted by a lifting device. A hanging load mechanism (hanging jig) that grips the removal member traverses along the installation girder and suspends the removal member from the lorry. In the removal process and the removal member loading process, the removal member can be lifted and hung using a lifting mechanism, and the removal member can be lifted and hung by vertically extending and retracting the lifter. In addition, it is possible to provide a function of the lifter suspension latch horizontally moving in the direction of the bridge axis or the direction perpendicular to the bridge axis. As a result, the position can be adjusted freely, that is, a member below the installation girder and in a direction perpendicular to the installation girder axis can be easily lifted and hung. Furthermore, a function can be provided in which the suspended load mechanism moves horizontally in the direction perpendicular to the erection girder, whereby members located away from directly below the erection girder can be easily lifted and hung.

  The “member renewal method using the lifting device” of the present invention may be a method further including a new installation step. In this new installation process, a new member mounted on a lorry is lifted by a lifting device, and a hanging load mechanism (hanging jig) that grips the new member is traversed along the erection girder to install the new member in the construction section. Hang in place and install. In the new installation step, the new member can be lifted and hung using a lifting mechanism, and the new member can be lifted and hung by vertically extending and lowering the lifter.

  The “member updating method using the lifting device” of the present invention may be a method further comprising a lifting device construction step of constructing the lifting device. This lifting apparatus construction process is a process having an installation beam assembly process and an installation beam installation process. Among them, in the installation girder assembly process, two or more divided members are connected on the road surface of the construction section to assemble the installation girder, and in the installation girder installation process, the installation girder with the suspended load mechanism is installed in two or more lifters (construction work). Installed across the section). In addition, the suspended load mechanism can be carried into the site in a state where it is already attached to the installation girder, or the installation girder and the suspended load mechanism will be loaded separately, and the suspended load mechanism will be installed according to the connection of the divided members. It can also be attached to a girder.

  “Member updating method using lifting device” of the present invention is a method of updating a component of a road bridge using a winch type lifting device installed in a construction yard. It can also be set as the method provided with the process. The first lifting device and the second lifting device of the winch type lifting device are respectively arranged so as to sandwich the front and rear of the removal member. In the removal process, the components of the road bridge cut in advance in the construction section are removed from the road bridge body by lifting the lifting mechanism or lifting the lifter. In the removal member loading process, the removal member removed in the removal process is removed from the truck. Suspend on. Furthermore, the removal process has a removal member double suspension process, a removal member moving process, and a removal member piece lowering process. In the removal member double suspension step, the removal member held by the suspension jig is lifted by winding the suspension ropes by the power means of the first lifting device and the second lifting device. In the removal member moving step, the power member of the second lifting device lowers the suspension rope while the removal member is lifted by the power device of the first lifting device, so that the removal member is moved to the first lifting device. Move to below the heavy equipment. In the removal member piece lowering process, the removal member is suspended from the truck by the first lifting device. In this case, it can also be set as the method further provided with the new installation process which hangs and installs the new member mounted in the truck at the planned position of a construction area. This new installation process has a new member double suspension process, a new member moving process, and a new member piece lowering process. In the both-new-member suspension process, the suspension members are lifted from the lorry by lifting the suspension ropes by the power means of the first lifting device and the second lifting device. This truck moves outside the construction section. Also, in the new member moving step, the new member is lifted by the first lifting device when the power member of the second lifting device lowers the suspension rope while the new member is lifted by the power device of the first lifting device. Move to the bottom of the device. Then, in the new member piece lowering step, the new member is suspended at the planned position by the first lifting device.

  The “member renewal method using a lifting device” of the present invention is a method of using a lifting device including four or more lifters, a construction girder, and two or more suspended load mechanisms, and a removal step; It can also be set as the method provided with the 1st refilling process, the 2nd refilling process, and the removal member loading process. Of the four or more lifters, the first sub-lifter and the second sub-lifter are arranged across the construction section, the first main lifter is arranged between the first sub-lifter and the construction section, and the second main lifter Is arranged between the second sub-lifter and the construction section. The installation girder is fixed to the gantry of the first main lifter and the second main lifter and spanned between the lifters, and the hanging load mechanism is attached to the installation girder so as to traverse along the installation girder. In the removal process, the structural members of the road bridge that have been cut in advance in the construction section are removed by lifting the lifting mechanism or lifting the lifter. In the first refilling process, the removal member removed in the removal process is lifted by a lifting device, and a hanging load mechanism that grips the removal member along the erection girder hangs and suspends one end of the removal member on the lorry. Thus, the removal member is supported by the suspended load mechanism and the lorry. In the second refilling step, the lorry supporting one end of the removal member moves and the suspension mechanism that grips the removal member moves along the installation girder so that a part of the removal member becomes the first sub-lifter. The removal member is transported until it is positioned below, and the support of one end of the removal member is transferred from the lorry to the first auxiliary lifter. In the removal member loading step, the removal member supported by the hanging load mechanism and the first sub-lifter is suspended from the lorry moved to the lower side of the removal member. In the removal process and the removal member loading process, the removal member can be lifted and hung using a lifting mechanism, and the removal member can be lifted and hung by vertically extending and retracting the lifter. Further, in this case, a method including a new member lifting process, a third refilling process, a fourth refilling process, and a new installation process may be employed. In the new member lifting process, the new member transported to the lower side of the second main lifter and the second sub-lifter is lifted from the lorry by the lifting mechanism and the second sub-lifter. In the third refilling process, one end of the new member is suspended from the cargo vehicle by suspending one end of the new member from the second sub-lifter to the cargo vehicle, and the new member is supported by the suspension mechanism and the cargo vehicle. In the fourth refilling process, the lorry supporting one end of the newly installed member moves, and the suspended load mechanism that grips the newly installed member traverses along the installed beam so that a part of the newly installed member is below the installed beam. The new member is transported until it is located at the position, and the support of one end of the new member is transferred from the truck to the suspension mechanism. In the new installation process, the suspended load mechanism that grips the new member along the erection girder is rampant, and the new member is suspended and installed at the planned position in the construction section by the lifting device. In the new member lifting process and the new process, the removal member can be lifted and hung using a lifting mechanism, and the removal member can be lifted and hung by vertically extending and retracting the lifter.

  The “member renewal method using a lifting device” of the present invention is a method of using a lifting device including four or more lifters, a construction girder, and two or more suspended load mechanisms, and a removal step; It can also be set as the method provided with the 1st erection girder installation process and the removal member loading process. Of the four or more lifters, the first sub-lifter and the second sub-lifter are arranged across the construction section, the first main lifter is arranged between the first sub-lifter and the construction section, and the second main lifter Is arranged between the second sub-lifter and the construction section. The installation girder is fixed to three or more lifters including the first main lifter and the second main lifter and is bridged between the lifters. The suspension mechanism can be traversed along the installation girder. It is attached. In the removal process, the structural members of the road bridge that have been cut in advance in the construction section are removed by lifting the lifting mechanism or lifting the lifter. In the first installation girder installation step, the installation girder is bridged to the first main lifter, the second main lifter, and the first sub-lifter. In the removal member loading process, the removal member removed in the removal process is lifted by a lifting device, and the removal member is gripped along the installation girders spanned by the first main lifter, the second main lifter, and the first sub-lifter. The suspended load mechanism is rampant, and the removal member is suspended from the truck by the lifting device. In the removal process and the removal member loading process, the removal member can be lifted and hung using a lifting mechanism, and the removal member can be lifted and hung by vertically extending and retracting the lifter. Furthermore, in this case, a method including a second erection girder installation process and a new installation process may be employed. In the second erection girder installation step, the erection girder is bridged to the first main lifter, the second main lifter, and the second sub-lifter. In the new construction process, the new member mounted on the truck is lifted by the lifting device, and the new member is gripped along the construction girders spanned by the first main lifter, the second main lifter and the second sub-lifter. The suspended load mechanism ramps up, and the newly installed member is suspended from the planned position in the construction section by the lifting device. In the new installation process, the removal member can be lifted and hung using a hanging load mechanism, and the removal member can be lifted and hung by vertically extending and retracting the lifter.

  The “member renewal method using a lifting device” of the present invention is a method of using a lifting device including four or more lifters, a construction girder, and two or more suspended load mechanisms, and a removal step; It can also be set as the method provided with the removal member loading process. Of the four or more lifters, the first sub-lifter and the second sub-lifter are arranged across the construction section, the first main lifter is arranged between the first sub-lifter and the construction section, and the second main lifter Is arranged between the second sub-lifter and the construction section. The installation girders are fixed to the gantry of the first sub-lifter, the first main lifter, the second main lifter and the second sub-lifter and bridged between these lifters, and the lifting mechanism can traverse along the installation girders It is attached to the erection girder. In the removal process, the structural members of the road bridge that have been cut in advance in the construction section are removed by lifting the lifting mechanism or lifting the lifter. In the removal member loading process, the removal member removed in the removal process is lifted by a lifting device, and the lifting mechanism that grips the removal member along the installation girder is traversed, and the lifting device suspends the removal member from the lorry. take down. In the removal process and the removal member loading process, the removal member can be lifted and hung using a lifting mechanism, and the removal member can be lifted and hung by vertically extending and retracting the lifter. Further, in this case, a method including a new installation process can be used. In the new construction process, the newly installed members mounted on the lorry are lifted by the lifting device, and the lifting mechanism that grips the new members along the erection girder is rampant, and the newly installed members are moved to the planned position in the construction section. Suspend to install. In the new installation process, the removal member can be lifted and hung using a hanging load mechanism, and the removal member can be lifted and hung by vertically extending and retracting the lifter.

  The “member updating method using the lifting device” of the present invention may be a method of installing the lifter by the lifter independence in the lifter installation step. Specifically, the lifter is mounted on a cargo truck and carried into a temporary yard, and two connecting beams extend outside the cargo bed on the truck bed stopped at a predetermined position. The lower ends of the four pillars touch the road surface, and the lorry moves when the lifter is self-supporting on the road surface. Therefore, the lifter in this case has two connecting beams, and the upper portions of the columns are fixed to both ends of the two connecting beams, and the four columns can be expanded and contracted vertically and the two connecting beams are connected. The beam can be expanded and contracted to the left and right.

The lifting device of the present invention and the member update method using the lifting device have the following effects.
(1) Since it can be implemented with restrictions on only one lane, for example, in the case of four lanes in the upper and lower lanes, two lanes on the downside are fully open and one lane of the two lanes on the upside can always be opened.
(2) Since the lifter of the lifting device can use a normal lifter provided in the market, it can be carried out without labor and cost.
(3) Since the suspension jig traverses along the installation girder while holding the removal member or the new member, the removal member or the new member can be transported in the direction of the bridge axis (road extension direction). There is no need to prepare a large crane having a large working radius, and the cost can be reduced accordingly.
(4) Even with a narrow-width bridge having only one lane, the member can be updated by using the present invention.
(5) Even for a bridge having a bridge member on the bridge surface such as a lower truss and a lower arch, the present invention can be used to update the member in a limited work space on the bridge surface.
(6) Since the lifter of the lifting device is mounted on a truck and can be assembled and disassembled by itself, it can be easily assembled as a lifting device, and the construction time can be shortened.
(7) If the construction section length is one bridge span and the main girder and the floor slab are joined and updated (removal to new construction), the entire bridge can be updated more rapidly.

The top view which shows the condition which implements this invention and updates a part of road bridge. (A) is a perspective view which shows a lifter, (b) is a front view which shows a lifter. The step figure which shows the condition where the lifter mounted in the trailer is installed independently. The step figure which shows the main processes of the construction method of the construction girder type lifting device of this invention. (A) is a side view which shows the construction girder which consists of a main body girder and a rail girder, (b) is a front view which shows the construction girder type lifting apparatus of the state which suspended the removal member. The flowchart which shows the flow of the main processes of the member update method of this invention at the time of using a construction girder type lifting apparatus. (A) is a step figure which shows the process of lifting a removal member with a erection girder type lifting apparatus, (b) is a step figure which shows the process of mounting the removal member lifted with a erection girder type lifting apparatus in a truck. (A) is a step diagram showing a process of lifting a newly installed member mounted on a lorry by a erection girder type lifting device, (b) is a process of installing a new member lifted by a erected girder type lifting device at a planned position. FIG. (A) is a step diagram showing a process of temporarily placing a removal member on the rear side of the construction section, (b) is a step diagram showing a process of temporarily placing a new member on the rear side of the construction section. The flowchart which shows the flow of the main processes of the member update method of this invention at the time of using a winch type lifting apparatus. The step figure which shows the process of mounting a removal member in a truck with a winch type lifting apparatus. (A) is a model diagram showing the situation in which the removal member on the most end point side of the construction section is mounted on the truck by the lifting machine, and (b) is the removal member on the most end point side of the construction section in the construction truck. The model figure which shows the condition to mount. The flowchart which shows the flow of the main processes of the member update method of this invention at the time of using a 2 type long installation girder type lifting apparatus. The step figure which shows the process until it installs an installation girder among the member update methods of this invention at the time of using a 2 type long installation girder type lifting apparatus. The step figure which shows the process until it lifts a removal member among the member update methods of this invention at the time of using a 2 type long installation girder type lifting apparatus. The step figure which shows the process until it carries out a removal member among the member update methods of this invention at the time of using a 2 type long erection girder type lifting apparatus. The step figure which shows the process until installing a new member among the member update methods of this invention at the time of using a 2 type long installation girder type lifting apparatus. The flowchart which shows the flow of the main processes of the member update method of this invention at the time of using the multi-unit type long installation girder type lifting apparatus which spanned the installation girders on the three lifters. The step figure which shows the process until it carries out a removal member among the member update methods of this invention at the time of using the multi-unit type long installation girder type lifting device which spanned the installation girder on three lifters. The step figure which shows the process until installing a new member among the member update methods of this invention at the time of using the multi-unit type long installation girder type | formula lifting apparatus which spanned the installation girder on three lifters. The flowchart which shows the flow of the main processes of the member update method of this invention at the time of using the multi-unit type long installation girder type | formula lifting apparatus which spanned the installation girder on four lifters. The step which shows the process until a removal member is mounted in a lorry among the member renewal methods of this invention at the time of using the multi-unit type long erection girder type lifting device which erected the erection girder over four lifters Figure. The step figure which shows the process until it installs a new member among the member update methods of this invention at the time of using the multi-unit type long installation girder type | formula lifting apparatus which spanned the installation girder on four lifters.

  An example of an embodiment of a lifting device of the present invention and a member updating method using the lifting device will be described with reference to the drawings.

1. Definitions In describing examples of embodiments of the present invention, definitions of terms used here are given first.

(Components)
The lifting device of the present invention and the member updating method using the lifting device include a concrete floor slab, a steel floor slab, a main girder, a cross girder, or a joining member (a main girder and a floor slab, a cross girder constituting a road bridge). This is a technology related to the installation and removal of members such as members joined together. Therefore, these members constituting the road bridge are collectively referred to herein simply as “component members”. The constituent members can be made of various materials such as steel, concrete, FRP (Fiber Reinforced Plastics), that is, the material of the constituent members is not particularly limited in the present invention. Moreover, the member update method using the lifting apparatus of the present invention is a method of removing a component member and installing a new component member after removing the component member (hereinafter, removing and installing is referred to as “update”). For convenience, the removed component member is referred to as a “removal member” and the newly installed component member as a “new member”.

(Construction yard)
FIG. 1 is a plan view showing a situation where a part of a road bridge is updated by implementing the present invention. A range indicated by a broken line in this figure is a range for construction that is restricted in order to implement the member renewal method using the lifting device of the present invention, and this range is referred to herein as “construction yard 100”. And The construction yard 100 is set in a predetermined extension section using one lane of a road bridge. Note that “using one lane” means that no other lane is used. In addition to the case where the construction yard 100 is set only for the lane, a side area (shoulder on the shoulder) In addition, a case where the construction yard 100 is set for a range including a central belt, a side belt, a wall rail, a ground cover, or the like) is also included. Furthermore, the construction yard 100 may be set using a so-called 1,5 lane including the substantially half width of the lane adjacent to the one lane. For example, in the case of the road bridge with two upper and lower lanes shown in FIG. 1, the construction yard 100 is set using only one lane on the upper side (lower lane in the figure). Therefore, both the two lanes of the down line can be opened to the public at all times, and one line of the up line can be opened to the general state at all times. In other words, a construction vehicle (hereinafter referred to as “truck lorry Tr”) in which a removal member or a new member can be mounted on a cargo bed such as a truck, a trailer, or a carriage (in particular, a multi-wheel carriage such as a dolly) is a construction yard. It moves using one lane in which 100 is set.

(Construction section)
The section in which the component is updated (removal to installation) is referred to herein as “construction section 110”. Of course, the construction yard 100 is set so as to include the construction section 110 within the range, and the construction section 110 is set to be located on the rear side (near the end point side in FIG. 1). Here, the terms “front” and “rear” are used for explanation, but the front and rear are based on the traveling direction originally set for the lane. That is, when the construction yard 100 is set in the up lane, the start side is “front” and the end side is “rear”, and when the construction yard 100 is set in the down lane, the end side is “front” and the start side is “ "Back". The construction section is a section divided in the road extension direction (that is, the bridge axis direction) in one lane, such as between the support point of the bridge (that is, between the spans), but the road width direction ( That is, it can also be a section divided in the direction perpendicular to the bridge axis). In other words, components such as floor slabs and main girders for one lane can be updated at a time, and the components can be updated after being divided in the road width direction (perpendicular to the bridge axis). .

(Lifter)
2A and 2B are views showing the lifter, wherein FIG. 2A is a perspective view thereof, and FIG. 2B is a front view thereof. The lifter 500 is a general-purpose product distributed in the market (sold and rented), and includes four support columns 510 and a gantry 520 as shown in FIG. Each of these four support columns 510 is formed of a plurality of (three in the figure) divided bodies, and has a structure in which an upper divided body can accommodate a lower divided body. Then, by using hydraulic pressure or the like, the lower divided body can be taken in and out from the upper divided body, that is, the four columns 510 can be expanded and contracted vertically (that is, jacked up and jacked down). . Further, as shown in FIG. 2B, the lifter 500 has a gate shape when viewed from the front, and includes a space (hereinafter, referred to as “traffic space 540”) through which the cargo truck Tr can pass. The traffic space 540 is large enough to allow the lorry Tr to pass under the load when the lifter 500 lifts the load (depending on the size of the load). The lifter 500 can use a general-purpose product distributed in the market, or can use a specially manufactured product (custom-made product).

  Since the gantry 520 is connected to the four support columns 510 and is connected to the uppermost divided body, the gantry 520 also moves up and down as the support column 510 moves up and down. Further, as shown in FIG. 2B, a suspension latch 530 is attached to the lower surface of the gantry 520. The suspension locking tool 530 is a jig that can grip a removal member or a new member, and for example, a suspension hook can be used. Further, the gantry 520 includes two connecting beams 550, and the two connecting beams 550 have a function capable of extending and contracting to the left and right. Two of the four columns 510 are connected by one connecting beam 550, and the connecting beam 550 is expanded and contracted in the horizontal direction (left and right) by hydraulic pressure or the like. Of course, as the connecting beam 550 expands and contracts, the support column 510 connected thereto also moves left and right.

  Since the connecting beam 550 expands and contracts to the left and right, the lifter 500 can be installed and removed very easily. FIG. 3 is a step diagram showing a situation in which a lifter 500 mounted on a lorry Tr (trailer) is installed independently. As shown in FIG. 3A, the lifter 500 is placed on a cradle installed on the loading platform of the lorry Tr and is carried to a predetermined position in the construction yard 100. When the lorry Tr stops at the predetermined position, as shown in FIG. 3B, the connecting beam 550 is extended to the left and right (up and down in the drawing) until it reaches the outside of the loading platform while being placed on the receiving platform. Then, with the connecting beam 550 extended to the left and right, as shown in FIG. 3C, the four columns 510 are extended downward until the lower end of the connecting beam 550 comes in contact with the road surface. To do. When the lifter 500 is self-supporting, the lorry Tr moves from below the lifter 500. In addition, when removing the lifter 500 and carrying it out, it is good to perform the step shown in FIG. 3 in reverse order (FIG. 3 (c)-> (a)).

  As shown in FIG. 2, in the conventional lifter 500, the suspension latch 530 is fixed to the lower surface of the gantry 520, and the suspension latch 530 itself moves up and down independently (that is, approaches and separates from the gantry 520). ) I can't. That is, the suspension latch 530 of the lifter 500 only grips the removal member or the newly installed member, and is held by the suspension latch 530 when the four columns 510 move up and down (that is, the gantry 520 moves up and down). The removal member or the newly installed member is lifted or suspended.

2. Lifting device Next, the lifting device of the present invention will be described with reference to the drawings. The lifting device of the present invention is configured to load the removal member removed in the construction section 110 onto the truck 4 and install a new member mounted on the truck 4. Therefore, as shown in FIG. 1, the lifting device of the present invention is installed around the construction section 110 (backward in this figure). The lifting device of the present invention is a novel lifting device using a lifter that has been used in the past. The lifting device can be roughly classified into two types: a “standing girder type lifting device 200” and a “winch type lifting device 300”. Can do. The construction girder type lifting device 200 is a lifting device that spans a plurality of lifters, and the winch type lifting device 300 is a lifting device in which a lifting mechanism is installed on the lifter. Each will be described in turn below.

(Early girder type lifting device)
In order to describe the installation girder type lifting apparatus 200 of the present invention, first, a construction method of the installation girder type lifting apparatus 200 will be described. FIG. 4 is a step diagram showing the main steps of the construction method of the erected girder type lifting device 200. First, as shown in FIG. 4A, two lifters 500 are installed. At this time, the two lifters 500 are installed so as to sandwich the position of the component member to be removed or the planned position for installing the installation member. In addition, although the two lifters 500 are installed here for convenience, not only this but three or more lifters 500 can also be installed.

  When the lifter 500 is installed, the installation girder 210 is completed. As shown in FIG. 4B, when the installation girder 210 is long, a plurality (two in the figure) of divided members 210a can be connected. Of course, depending on the extension, the installation girder 210 can be formed of one member without being divided. Further, the erection girder 210 can be configured to be extendable and contractable in the same manner as a boom such as a raft crane. The erection girder 210 having a structure that can be expanded and contracted may have a cross-sectional shape in a mouth shape and accommodate a divided piece (a member obtained by dividing the erection girder 210). Further, as shown in FIG. 5A, the installation girder 210 is formed by a main body girder 211 that is a structural girder and a rail girder 212 that is fixed to the lower part of the main body girder 211. The main body girder 211 may be a girder using H-shaped steel or I-shaped steel, or a truss-shaped girder. One rail girder 212 can be a girder using H-shaped steel or I-shaped steel, or a girder combining angle steel or grooved steel.

  In order to complete the installation girder 210 by connecting the dividing members 210a, as shown in FIG. 4 (b), two dividing members 210a are placed on a pedestal placed on the road surface, as shown in FIG. 4 (c). This is done by connecting them as shown. At this time, part of the rail girder 212 installed between the two divided members 210a is also installed. The suspended load mechanism 400 can be carried into the site in a state of being attached to the erection girder 210 (rail girder 212) in advance, or the erected girder 210 and the suspended load mechanism 400 can be carried separately and divided members 210a. The suspended load mechanism 400 can be attached to the erection girder 210 in accordance with the connection. The suspension load mechanism 400 includes a suspension rope 410, a suspension jig 430 fixed to the tip of the suspension rope 410, and a power unit that can lift and lower the suspension jig 430 while supporting the load. It is a device for unloading such as a hoist. Alternatively, a chain block having manual power means can be attached to the erection beam 210 (rail beam 212) as the suspended load mechanism 400. However, the suspended load mechanism 400 is attached so that it can traverse along the erection girder 210. Specifically, as shown in FIG. 5 (b), the suspension mechanism 400 includes a movable locking means 420 attached to the upper end of the suspension rope 410, and the suspension jig 430 is a constituent member. A structure in which the wheels of the movable locking means 420 locked to the rail girder 212 can move along the rail girder 212 after gripping the (removal member or new member). Furthermore, in addition to being able to traverse along the installation girder 210 (for example, in the direction of the bridge axis), the suspended load mechanism 400 may be configured to be horizontally movable in a direction perpendicular to the installation girder 210 (for example, in the direction perpendicular to the bridge axis). This makes it possible to easily lift and suspend a member located away from directly below the installation girder.

  As shown in FIG. 2, the lifter 500 has the suspension latch 530 fixed to the lower surface of the gantry 520 as described above, and therefore the suspension latch 530 itself cannot be moved up and down independently. Therefore, a suspended load mechanism 400 (such as a winch or a hoist) can also be installed on the lifter 500 itself (aside from that attached to the erection girder 210). In this case, the suspension mechanism 400 may be installed on the lifter 500 by fixing the main body of the suspension mechanism 400 to the gantry 520, for example. Since the lifter 500 includes the lifting mechanism 400, the lifting jig 430 can be moved up and down independently of the gantry 520 without moving up and down the four columns 510. In addition, the suspension locking tool 530 provided in the lifter 500 may be configured to be horizontally movable in a bridge axis direction or a direction perpendicular to the bridge axis. As a result, the position can be adjusted freely, that is, a member below the installation girder and in a direction perpendicular to the installation girder axis can be easily lifted and hung.

  When the erection girder 210 is completed and the hanging load mechanism 400 is attached to the erection girder 210, both ends of the erection girder 210 are fixed to the gantry of the two lifters 500, and then, as shown in FIG. Extend the support column 510 of the lifter 500 and jack up. Thereby, the installation girder 210 is bridged between the two lifters 500, and the installation girder type lifting device 200 is constructed in the construction section 110.

(Winch type lifting device)
The winch type lifting device 300 of the present invention is a lifting device in which a lifting mechanism 400 is installed on a lifter 500. However, unlike the erection girder type lifting device 200, the erection girder 210 is not bridged. The hanging load mechanism 400 installed in the winch type lifting device 300 includes a hanging rope 410, a hanging jig fixed to the tip of the hanging rope 410, and a power unit that can lift and lower the hanging jig while supporting the load. It is a device for unloading such as a so-called winch or hoist. The suspension mechanism 400 can be installed on the lifter 500 by fixing the main body of the suspension mechanism 400 to the gantry 520, for example.

3. Member Updating Method Using Lifting Device Subsequently, with regard to the member updating method using the lifting device of the present invention, the case where the erected girder type lifting device 200 is used as the lifting device and the winch type lifting device 300 is used. In this case, the explanation will be divided into the case where the erected girder type lifting device 200 including four or more lifters 500 is used.

(When using a girder type lifting device)
FIG. 6 is a flowchart showing the flow of the main steps of the member updating method of the present invention when the erected girder type lifting device 200 is used. In starting construction, first, a construction yard 100 is set as shown in FIG. 1 (Step 110). The construction yard 100 is set so that the construction section 110 is included and the construction section 110 is located closer to the rear of the whole. The setting of the construction yard 100 may be clearly indicated by, for example, installing a temporary enclosure around it. When the construction yard 100 is set, the lorry Tr equipped with the lifter 500 enters the construction yard 100. At this time, the lorry Tr passes through the lane in which the construction yard 100 is set, that is, from the rear side (in this case, the end point side) without passing through the other lanes shown in FIG. Enter the construction yard 100.

  When the lorry Tr stops at a predetermined position around the construction section 110, the erection girder lifting device 200 is constructed (Step 210). Specifically, as shown in FIG. 3 and FIG. 4 (a), two lifters 500 are installed so as to sandwich the construction section 110 (Step 211), and installed as shown in FIGS. 4 (b) to (c). The girder 210 is assembled (Step 212). In addition, when the installation girder 210 having a structure that can be expanded and contracted is adopted, the assembly process of the installation girder 210 is simplified as compared with a case in which the dividing member 210a is connected to form the installation girder 210. When the erection girder 210 is assembled, if the erection girder 210 to which the suspension mechanism 400 is attached in advance is carried in, the process proceeds to the installation process of the erection girder (Step 214). In this case, the suspension mechanism 400 is attached to the erection girder 210 so as to traverse (Step 213). Then, both ends of the erection girder 210 are fixed to the gantry 520 of the two lifters 500 (Step 214), and then, as shown in FIG. The mold lifting device 200 is constructed.

  When the preparation up to here is completed, the components planned in the construction section 110 are removed from the road bridge body (Step 220). At this time, after cutting structural members from the road bridge using equipment such as a cutter, a wire saw, a gas cutter, etc., the hoisting by the lifting mechanism 400 or the vertical extension / contraction of the lifter 510 itself (that is, the jack by extension / contraction of the column 510) The components may be removed by down and jacking up. In addition, when a structural member is already removed and the removed member is temporarily placed around the construction section 110, the member removal step (Step 220) can be omitted. When the component member is removed (or when the removal member is prepared), the erection girder type lifting device 200 lifts the removal member and mounts it on the lorry Tr that has moved back to the front of the construction section 110 (Step 230).

  FIG. 7A is a step diagram showing the process of lifting the removal member by the erection girder lifting device 200, and FIG. 7B shows the removal member lifted by the erection girder lifting device 200 on the lorry Tr. It is a step figure which shows the process to mount. As shown in this figure, the removal member is gripped by the suspension jig 430 of the suspension mechanism 400, the removal member is lifted by the power means of the suspension mechanism 400 in that state, and the suspension member is suspended in the state where the removal member is lifted. As the mechanism 400 moves along the erection girder 210, the removal member is mounted on the lorry Tr waiting in front. The lifting and lowering of the removal member by the erection girder type lifting device 200 can be performed by vertically extending and lowering the lifter 510 itself (that is, jacking down and jacking up due to expansion and contraction of the support column 510). The lifter 510 can be used in combination.

  In addition, when the chain block is used as the lifting mechanism 400 instead of a powered lifting device such as a winch or a hoist, the removal member is held by the chain block lifting jig 430 and the chain is wound by human power. The removal member is lifted by raising (for example, about 50 cm), and in this state, the removal member is moved laterally along the installation girder 210 to the lower side of one (front side) lifter 500. Then, when the lifter 500 is jacked up, the removal member is lifted to a considerable height (for example, 3 m), and then the removal member is suspended from the loading platform of the lorry Tr that has moved into the traffic space 540.

  Next, when the lorry Tr loaded with the new member moves back to the front of the construction section 110, the erection girder lifting device 200 installs the new member at the planned position of the construction section 110 (Step 240). FIG. 8A is a step diagram illustrating a process of lifting a newly installed member mounted on the truck Tr with the erection girder lifting device 200, and FIG. It is a step figure showing the process of installing a member in a plan position. As shown in this figure, the newly installed member mounted on the lorry Tr is gripped by the suspension jig 430 of the suspension mechanism 400, and in this state, the newly installed member is lifted by the power means of the suspension mechanism 400. The suspended load mechanism 400 moves to the planned position along the erection girder 210 in a state in which the new member is suspended and installed at the planned position in the construction section 110. The lifting and lowering of the newly installed member by the erection girder type lifting device 200 can be performed by vertically extending and lowering the lifter 510 itself (that is, jacking down and jacking up due to expansion and contraction of the support column 510). The lifter 510 can be used in combination.

  Even when a new member is installed, the chain block can be the suspended load mechanism 400. That is, for example, a newly installed member temporarily placed on the road surface is gripped by the chain block lifting jig 430 and the chain is lifted by human power to lift the newly installed member (for example, about 50 cm). Move horizontally along the erection girder 210 to the planned position. Then, when the lifter 500 is jacked down, the new member is suspended at the planned position.

  The removal member can be mounted on the lorry Tr every time it is removed, or temporarily placed at a predetermined location in the construction yard 100 (for example, the rear side of the construction section 110) as shown in FIG. It can also be left. Similarly, the new member can be installed at the planned position every time it is lifted from the lorry Tr, or as shown in FIG. 9B, a predetermined location in the construction yard 100 (for example, the rear side of the construction section 110). It can also be placed temporarily.

  When the member removal step (Step 220) to the new member installation step (Step 240) so far are repeated for the planned amount, the post-cleaning is performed (Step 120) to complete the operation.

(When using a winch type lifting device)
FIG. 10 is a flowchart showing the flow of the main steps of the member updating method of the present invention when the winch type lifting device 300 is used. When the construction yard 100 is set (Step 110), the two winch type lifting devices 300 are installed around the construction section 110 (Step 310), as in the case of using the erection girder type lifting device 200. Here, in order to distinguish between the two winch type lifting devices 300, the one installed in the front of the construction yard 100 is the first winch type lifting device 300a and the one installed in the rear is the second. It is assumed that the winch type lifting device 300b.

  When the first winch type lifting device 300a and the second winch type lifting device 300b are installed, the components planned in the construction section 110 and previously cut from the road bridge are removed (Step 320). In addition, when a structural member is already removed and the removed member is temporarily placed around the construction section 110, the member removal step (Step 320) can be omitted. When the component member is removed (or when the removal member is prepared), the winch type lifting device 300 lifts the removal member and mounts it on the lorry Tr that has moved back to the front of the construction section 110 (Step 330).

  FIG. 11 is a step diagram showing a process of mounting the removal member on the lorry Tr using the winch type lifting device 300 (the first winch type lifting device 300a and the second winch type lifting device 300b). As described above, the hanging load mechanism 400 of the winch type lifting device 300 includes the hanging rope 410 (wire rope, chain, etc.), a hanging jig (hook, etc.) fixed to the tip of the hanging rope 410, and It has power means and is a device for unloading such as a so-called winch or hoist. That is, by lifting or lowering the suspension rope 410 by the power means of the suspension load mechanism 400, the constituent members (removal member or new member) held by the suspension jig can be lifted or suspended. In addition, when a component member is lifted or suspended using the two winch type lifting devices 300, a considerable horizontal force may act on each winch type lifting device 300 depending on the weight of the component member. is there. In that case, it is advisable to firmly fix the pillars 510 of the lifter 500 on the road surface and further reinforce the four pillars 510 so that the winch type lifting device 300 does not fall down.

  As shown in FIG. 11 (a), the first winch type lifting device 300a and the second winch type lifting device 300b are installed after providing a predetermined interval so as to sandwich the removal member. Moreover, as shown in FIG.11 (d), it is good to install the 1st winch type lifting apparatus 300a in the position where the lorry Tr stops later. When the first winch type lifting device 300a and the second winch type lifting device 300b are installed, both suspension ropes 410 are lowered and the removal member is gripped by both suspension jigs. In this state, both suspension ropes 410 are wound up equally by both power means, and the removal member is lifted so as to be positioned approximately in the middle between the first winch type lifting device 300a and the second winch type lifting device 300b. (Step 331).

  When the removal member is lifted, the removal member is moved below the first winch type lifting device 300a as shown in FIG. 11C (Step 332). Specifically, the power of the second winch type lifting device 300b is maintained while the suspension rope 410 is wound up by the power means of the first winch type lifting device 300a (that is, the removal member is lifted). The suspension rope 410 is unwound by means (that is, the suspension rope 410 is loosened and extended). As a result, the removal member is pulled toward the first winch type lifting device 300a, and finally moves below the first winch type lifting device 300a.

  When the removal member is moved below the first winch type lifting device 300a, as shown in FIG. 11 (d), the lorry Tr is entered (retracted) so that the cargo bed enters the passage space 540, and the first The hoisting rope 410 is unwound by the power means of the first winch type lifting device 300a (that is, the hoisting rope 410 is loosened and extended), whereby the removal member is mounted on the lorry Tr (Step 333), and the first winch The holding of the removal member by the lifting jigs of the mold lifting device 300a and the second winch type lifting device 300b is released.

  Next, when the lorry Tr loaded with the new member moves back to the front of the construction section 110, the winch-type lifting device 300 installs the new member at the planned position of the construction section 110 (Step 340). When a new member is installed by the winch type lifting device 300, the first winch type lifting device 300a is installed at the planned position, and the second winch type lifting device is installed at a position away from the first lifting device 300a. A device 300b is installed. Or the 2nd winch type lifting apparatus 300b may be installed in a plan position, and the 1st winch type lifting apparatus 300a may be installed in the position away from the 2nd lifting apparatus 300b. When the first winch type lifting device 300a and the second winch type lifting device 300b are installed in this way, both the suspension ropes 410 are unwound and a new installation mounted on the lorry Tr with both suspension jigs. Hold the member. In this state, both suspension ropes 410 are equally wound by both power means, and the new member is lifted so as to be positioned approximately in the middle between the first winch type lifting device 300a and the second winch type lifting device 300a. (Step 341).

  When the newly installed member is lifted, the newly installed member is moved below the first winch type lifting device 300a (Step 342). Specifically, the power of the second winch type lifting device 300b is maintained while the suspension rope 410 is wound up by the power means of the first winch type lifting device 300a (that is, the state where the newly installed member is lifted). The suspension rope 410 is unwound by means (that is, the suspension rope 410 is loosened and extended). As a result, the new member is pulled toward the first winch type lifting device 300a, and finally moves below the first winch type lifting device 300a.

  When the new member is moved below the first winch type lifting device 300a, the suspension rope 410 is unwound by the power means of the first winch type lifting device 300a (that is, the suspension rope 410 is loosened and extended). Thus, the new member is installed at the planned position (Step 343), and the gripping of the new member by the first winch type lifting device 300a and the second winch type lifting device 300b lifting jig is released.

  When the member removal step (Step 320) to the new member installation step (Step 340) up to here are repeated for the planned amount, the post-cleaning is performed (Step 120) to complete the operation.

(When using a girder type lifting device consisting of 4 or more lifters)
The member updating method using the erected girder type lifting device 200 composed of four or more lifters is particularly effective when updating a long component in the bridge axis direction. The erection girder type lifting device 200 composed of the lifter is referred to as a “long erection girder type lifting device 200”. Further, the member renewal method using the long erection girder type lifting device 200 further includes “a case using the long erection girder type lifting device 200 in which the erection girder 210 is bridged between two lifters 500” and “ It can be roughly classified into “a case using a long erection girder type lifting device 200 in which erection girder 210 is bridged between three or more lifters 500”. Therefore, the long erection girder type lifting device 200 in which the erection girder 210 is bridged between the two lifters 500 is referred to as “two-type long erection girder lifting device 200” and three or more lifters 500. The long erection girder type lifting device 200 in which the erection girder 210 is bridged is referred to as a “multi-base long erection girder lifting device 200”. Hereinafter, a case using the two-type long erection girder lifting device 200 and a case using the multi-base long erection girder lifting device 200 will be described in order.

  FIG. 13 is a flowchart showing the flow of the main steps of the member updating method of the present invention when the two long elongate girder type lifting device 200 is used. In starting construction, the construction yard 100 is set first as described above (Step 110). When the construction yard 100 is set, as shown in FIG. 14 (a), four trucks Tr mounted with the lifter 500 enter the construction yard 100. At this time, the lorry Tr passes through the lane in which the construction yard 100 is set, that is, from the rear side (in this case, the end point side) without passing through the other lanes shown in FIG. Enter the construction yard 100.

  As shown in FIG. 14 (b), when the lorry Tr stops at a predetermined position around the construction section 110, the two-type long erected girder lifting device 200 is constructed (Step 410). Hereinafter, a method for constructing the two long span girder type lifting device 200 will be described in detail. First, as shown in FIG. 14C, two lifters 500 are installed so as to sandwich the construction section 110 (Step 411). For convenience, here, the lifter 500 located in the foremost position (leftmost in FIG. 14) is referred to as “first sub-lifter 500sa”, and the lifter 500 located in the rearmost position (rightmost in FIG. 14) is referred to as “second lifter”. The sub-lifter 500 sb ”, and the lifter 500 positioned between the first sub-lifter 500 sa and the construction section 110 (second from the left in FIG. 14) are referred to as“ first main lifter 500 ma ”and second sub-lifter 500 sb. The lifter 500 located between the construction section 110 and the construction section 110 (second from the right in FIG. 14) is referred to as a “second main lifter 500mb”.

  When four lifters 500 are installed at predetermined positions, as shown in FIG. 14 (d), two lorry trucks Tr mounted with split members 210a are placed between the first main lifter 500ma and the second main lifter 500mb (that is, The construction section 110) is entered, and the split member 210a is connected on the cargo truck Tr to form the erection girder 210 (Step 412), and the two suspension mechanisms 400 are attached to the erection girder 210 so as to traverse (Step 413). Of course, it is possible to connect the dividing member 210a on the ground instead of on the lorry Tr. In addition, one erection girder 210 can be used without being divided, and the suspension mechanism 400 is attached to the erection girder 210 in advance. It can also be carried in after installation. Then, as shown in FIG. 15 (a), both ends of the installation girder 210 are extended, the first main lifter 500ma and the second main lifter 500mb are jacked down to lower the respective gantry, and one end of the installation girder 210 (in FIG. 15) The left side is fixed to the gantry of the first main lifter 500ma, and the other end (right side in FIG. 15) is fixed to the gantry of the second main lifter 500mb (Step 414). When the installation girder 210 is fixed to the first main lifter 500ma and the second main lifter 500mb, the first main lifter 500ma and the second main lifter 500mb are jacked up as shown in FIG. By lifting the vehicle up to the height, the two trucks Tr are exited. At this time, a dolly DL (hereinafter, this dolly is referred to as a “first dolly DL01”), which is one of the trucks Tr, enters the construction yard 100 and waits in front of the construction section 110.

  When the preparation up to this point is completed, the components planned in the construction section 110 and cut in advance from the road bridge are removed from the road bridge body (Step 420). In addition, when a structural member is already removed and the removal member is temporarily placed around the construction section 110, the member removal step (Step 420) can be omitted. When the component member is removed (or when the removal member is prepared), the first main lifter 500ma and the second main lifter 500mb are jacked down and attached to the installation beam 210 as shown in FIG. The removal member is held by the two hanging load mechanisms 400, and in this state, as shown in FIG. 15D, the first main lifter 500ma and the second main lifter 500mb are jacked up to lift the removal member to a predetermined height. . The lifting and lifting of the removal member can be performed by means of jacking down and jacking up the first main lifter 500ma and the second main lifter 500mb, or by power means of the lifting mechanism 400 such as a winch or hoist, It can be performed by human power using a chain block (suspended load mechanism 400) or by using them together.

  When the removal member is lifted, as shown in FIG. 16A, the removal member is moved forward until the front end of the removal member is positioned below the first main lifter 500ma. Specifically, the removal member is moved forward by causing the two suspended load mechanisms 400 holding the removal member to traverse forward along the installation girder 210. When the removal member moves to a predetermined position, the front end of the removal member is suspended from the first dolly DL01 that has been waiting under the first main lifter 500ma, and the grasping of the removal member by the lifting mechanism 400 on the front side is released. . Thereby, the support of the front end of the removal member is shifted from the front suspension mechanism 400 to the first dolly DL01, that is, the removal member is supported by the rear suspension mechanism 400 and the first dolly DL01 (Step 430).

  When the removal member is supported by the rear load mechanism 400 and the first dolly DL01, as shown in FIG. 16 (b), the removal member is moved until a part of the removal member is positioned below the first auxiliary lifter 500sa. Move forward. Specifically, the first dolly DL01 mounted with the front end of the removal member moves (advances), and the rear suspension mechanism 400 that grips the removal member is moved forward along the erection girder 210 to remove it. The member is moved forward. When the removal member moves to a predetermined position, a part (front side) of the removal member is gripped by the suspension latch 530 of the first sub-lifter 500sa, and the support of the removal member by the first dolly DL01 is released. Accordingly, the support on the front side of the removal member is transferred from the first dolly DL01 to the first auxiliary lifter 500sa, that is, the removal member is supported by the rear hanging mechanism 400 and the first auxiliary lifter 500sa (Step 440).

  When the removal member is supported by the rear hanging load mechanism 400 and the first auxiliary lifter 500sa, the first dolly DL01 moves (retreats) until it is positioned below the removal member, as shown in FIG. Then, the removal member of the first dolly DL01 is suspended, and the holding of the removal member by the rear hanging mechanism 400 and the first auxiliary lifter 500sa is released (Step 450), as shown in FIG. 16 (d). The removal member is carried out of the construction yard 100.

  When the structural member is removed, the dolly DL (hereinafter, this dolly is referred to as “second dolly DL02”) on which the new member is mounted enters the construction yard 100, and the new member further includes the second main lifter 500mb and the second secondary lifter. The second dolly DL02 is moved until it is positioned between the lifters 500sb. When the new member is carried to a predetermined position as shown in FIG. 16 (c), a part of the new member (front side) by the load mechanism 400 on the front side of the two suspended load mechanisms 400 attached to the erection girder 210. And a part of the newly installed member (rear side) by the suspension latch 530 of the second sub lifter 500sb, and then the new member is lifted by the rear load mechanism 400 and the second sub lifter 500sb. (Step 460), the second dolly DL02 is moved backward as shown in FIG.

  When the second dolly DL02 is retracted to the rear end of the new member, the rear end of the new member is suspended from the second dolly DL02, and the gripping of the new member by the suspension lock 530 of the second sub-lifter 500sb is released. Thereby, the support of the rear end of the new member is shifted from the second sub-lifter 500sb to the second dolly DL02, that is, the new member is supported by the front hanging mechanism 400 and the second dolly DL02 (Step 470).

  When the new member is supported by the forward load mechanism 400 and the second dolly DL02, as shown in FIG. 17 (a), the new member is moved until a part of the new member is positioned below the second main lifter 500mb. Move forward. Specifically, the second dolly DL02 mounted with the rear end of the newly installed member moves (advances), and the front hanging mechanism 400 that grips the newly installed member is moved forward along the installation girder 210 to newly install the new member. The member is moved forward. When the new member moves to a predetermined position, a part of the new member (rear side) is gripped by the rear load mechanism 400 of the two hanging load mechanisms 400 attached to the erection girder 210, and the new dolly DL02 newly installs. Release the support of the member. Thereby, the support on the rear side of the new member is shifted from the second dolly DL02 to the load mechanism 400 on the rear side, that is, the new member is supported by the two load mechanisms 400 (front side and rear side) (Step 480). .

  When the new member is supported by the two suspended load mechanisms 400, the new member is moved forward to the planned position of the construction section 110 as shown in FIG. Specifically, the two newly installed members are moved forward by traversing the two suspended load mechanisms 400 holding the new member forward along the installation girders 210. Then, as shown in FIG. 17 (c), the first main lifter 500ma and the second main lifter 500mb are jacked down, the new member is suspended, and the holding of the new member by the two suspended load mechanisms 400 is released. A new member is installed at the planned position (Step 480). In addition, the lifting and lifting of the new member can be performed by jacking down and jacking up the first main lifter 500ma and the second main lifter 500mb, or by power means of the lifting mechanism 400 such as a winch or a hoist, It can be performed by human power using a chain block (suspended load mechanism 400) or by using them together.

  When the member removal step (Step 420) to the new member installation step (Step 480) up to here are repeated for the planned amount, the post-cleaning is performed (Step 120) to complete the operation. Here, an example is described in which one dolly DL carries the removal member or the new member, but of course, the removal member or the new member can also be carried by two or more dolly DLs. In addition, the above explanation shows an example in which the newly installed member is carried in after the removed member is carried out. However, the present invention is not limited to this example. It can also be set as the procedure which installs a member.

  Then, the case using the multi-base long erection girder type lifting device 200 will be described. FIG. 18 is a flowchart showing the flow of the main steps of the member updating method of the present invention when the multi-base long girder-type lifting device 200 is used. In starting construction, the construction yard 100 is set first as described above (Step 110). When the construction yard 100 is set, the four trucks Tr with the lifter 500 are entered into the construction yard 100. At this time, the lorry Tr passes through the lane in which the construction yard 100 is set, that is, from the rear side (in this case, the end point side) without passing through the other lanes shown in FIG. Enter the construction yard 100.

  As shown in FIG. 19A, the four lifters 500 carried into the construction yard 100 include a first sub-lifter 500sa, a first main lifter 500ma, a second main lifter 500mb, and a second sub-lifter 500sb from the front. In order, the first main lifter 500ma and the second main lifter 500mb are installed so as to sandwich the construction section 110 (Step 510).

  When the four lifters 500 are installed at predetermined positions, the lorry Tr mounted with the dividing member 210a enters between the first sub-lifter 500sa and the second main lifter 500mb, and the dividing member 210a is connected to form the installation girder 210. At the same time (Step 521), one or more suspended load mechanisms 400 are attached to the erection girder 210 so as to be traversable (Step 522). Of course, one erection girder 210 can be used without being divided, or can be carried in after the suspension load mechanism 400 is attached to the erection girder 210 in advance. Then, as shown in FIG. 19B, one end (the left side in FIG. 19) of the erection beam 210 is fixed to the gantry of the first sub-lifter 500sa, and the central part of the erection beam 210 is fixed to the gantry of the first main lifter 500ma. Then, the other end (right side in FIG. 19) of the installation beam 210 is fixed to the gantry of the second main lifter 500mb (Step 523).

  When the preparation so far is completed, the structural members planned in the construction section 110 and cut in advance from the road bridge are removed from the road bridge body (Step 530). In addition, when a structural member is already removed and the removed member is temporarily placed around the construction section 110, the member removal step (Step 530) can be omitted.

  When the component member is removed (or when the removal member is prepared), as shown in FIG. 19C, the removal member is held by the hanging load mechanism 400 attached to the erection girder 210 and suspended to a predetermined height. increase. The removal member is lifted and suspended by jacking down and jacking up the first auxiliary lifter 500sa, the first main lifter 500ma, and the second main lifter 500mb, as well as by a power means of the lifting mechanism 400 such as a winch or a hoist. It can also be carried out, by human power using a chain block (suspended load mechanism 400), or in combination thereof.

  When the removal member is lifted, as shown in FIG. 19D, the removal member is moved forward until the removal member is positioned between the first sub-lifter 500sa and the first main lifter 500ma. Specifically, the removal member is moved forward by traversing the hanging load mechanism 400 holding the removal member forward along the installation girder 210. When the removal member moves to a predetermined position, the removal member is suspended from the waiting dolly DL, and the holding of the removal member by the lifting mechanism 400 is released (Step 540). Take it out.

  When the structural member is removed, as shown in FIG. 20A, one end (the left side in FIG. 20) of the installation girder 210 is fixed to the gantry of the first main lifter 500ma, and the central portion of the installation girder 210 is fixed to the second main lifter. The other end (right side in FIG. 20) of the installation girder 210 is fixed to the gantry of the second sub-lifter 500sb (Step 550). At this time, the installation girder 210 (Step 520) spanned between the first sub-lifter 500sa to the second main lifter 500mb can be removed (or slid) and used, or the first sub-lifter 500sa to the second sub-lifter 500sa. A new installation girder 210 different from the installation girder 210 extended over the main lifter 500mb can also be extended over the first main lifter 500ma to the second sub-lifter 500sb.

  When the installation girder 210 is bridged between the first main lifter 500ma to the second auxiliary lifter 500sb, the dolly DL loaded with the new member is caused to enter the construction yard 100, and the new member further becomes the second main lifter 500mb and the second auxiliary lifter. The dolly DL is moved until it is located between 500 sb. When the new member is carried to a predetermined position as shown in FIG. 20 (b), the new member is gripped and lifted by the lifting mechanism 400 attached to the erection girder 210, and the construction section is shown in FIG. 20 (c). The new member is moved forward to the planned position of 110. Specifically, the two newly installed members are moved forward by traversing the two suspended load mechanisms 400 holding the new member forward along the installation girders 210. And as shown in FIG.20 (d), a new installation member is installed in a plan position by suspending a new installation member and canceling | releasing the holding of the new installation member by the hanging load mechanism 400 (Step560). Note that the lifting and lifting of the newly installed member is not only by jacking down and jacking up the first main lifter 500ma, the second main lifter 500mb, and the second auxiliary lifter 500sb, but also by power means of the lifting mechanism 400 such as a winch or a hoist. It can also be carried out, by human power using a chain block (suspended load mechanism 400), or in combination thereof.

  When the member removal step (Step 530) to the new member installation step (Step 560) so far are repeated for the planned amount, the post-cleaning is performed (Step 120) to complete the operation.

  In the multi-base long girder type lifting device 200, the girder 210 is fixed to four lifters 500 (first main lifter 500ma, first sub lifter 500sa, second main lifter 500mb, and second sub lifter 500sb). It is also possible to adopt a configuration that spans. In this case, the first erection girder installation (Step 520) and the second erection girder installation (Step 550) can be omitted. Hereinafter, the procedure in this case will be described.

  As shown in FIG. 22 (a), four lifters 500 carried into the construction yard 100 include a first sub-lifter 500sa, a first main lifter 500ma, a second main lifter 500mb, and a second sub-lifter 500sb from the front. In order, the first main lifter 500ma and the second main lifter 500mb are installed so as to sandwich the construction section 110 (Step 611). When the four lifters 500 are installed, the lorry Tr carrying the dividing member 210a enters between the first sub-lifter 500sa to the second sub-lifter 500sb, and the dividing member 210a is connected to form the erection beam 210 (Step 612). At the same time, one or more suspension load mechanisms 400 are attached to the erection girder 210 so as to traverse (Step 613). Of course, one erection girder 210 can be used without being divided, or can be carried in after the suspension load mechanism 400 is attached to the erection girder 210 in advance. Then, as shown in FIG. 22 (b), one end of the installation girder 210 is fixed to the gantry of the first sub-lifter 500sa, and the central portion of the installation girder 210 is fixed to the gantry of the first main lifter 500ma and the second main lifter 500mb. Then, the other end of the installation girder 210 is fixed to the gantry of the second auxiliary lifter 500sb (Step 614).

  When the preparation so far is completed, the structural members planned in the construction section 110 and cut in advance from the road bridge are removed from the road bridge body (Step 620). In addition, when a structural member is already removed and the removal member is temporarily placed around the construction section 110, the member removal step can be omitted.

  When the component member is removed (or when the removal member is prepared), as shown in FIG. 22C, the removal member is gripped by the hanging load mechanism 400 attached to the installation girder 210 and suspended to a predetermined height. increase. The removal member is lifted and suspended by jacking down and jacking up the first sub-lifter 500sa, the first main lifter 500ma, the second main lifter 500mb, and the second sub-lifter 500sb, as well as hanging loads such as winches and hoists. It can also be performed by the power means of the mechanism 400, by human power using the chain block (suspended load mechanism 400), or in combination.

  When the removal member is lifted, the removal member is moved forward until the removal member is positioned between the first sub-lifter 500sa and the first main lifter 500ma as shown in FIG. Specifically, the removal member is moved forward by traversing the hanging load mechanism 400 holding the removal member forward along the installation girder 210. When the removal member moves to a predetermined position, the removal member is suspended from the waiting dolly DL, and the holding of the removal member by the hanging load mechanism 400 is released (Step 630), as shown in FIG. 23 (a). To remove the removed member out of the construction yard 100.

  When the component member is removed, the dolly DL on which the new member is mounted enters the construction yard 100, and the dolly DL is moved until the new member is positioned between the second main lifter 500mb and the second sub lifter 500sb. When the new member is carried to a predetermined position as shown in FIG. 23 (b), the new member is gripped and lifted by the lifting mechanism 400 attached to the erection girder 210, and the construction section is shown in FIG. 23 (c). The new member is moved forward to the planned position of 110. Specifically, the two newly installed members are moved forward by traversing the two suspended load mechanisms 400 holding the new member forward along the installation girders 210. Then, as shown in FIG. 23 (d), the new member is suspended at a planned position by lifting the new member and releasing the grip of the new member by the hanging load mechanism 400 (Step 640). In addition, the lifting and lifting of the new member is performed by jacking down and jacking up the first sub-lifter 500sa, the first main lifter 500ma, the second main lifter 500mb, and the second sub-lifter 500sb, as well as lifting loads such as winches and hoists. It can also be performed by the power means of the mechanism 400, by human power using the chain block (suspended load mechanism 400), or in combination.

  When the member removal step (Step 620) to the new member installation step (Step 640) up to here are repeated for the planned amount, clean-up is performed (Step 120) and the operation is completed.

  The lifting device and the member updating method using the lifting device of the present invention can be used for various types of road bridges such as a motorway and a general motorway. According to the present invention, in view of the fact that a road bridge in service can be efficiently updated and, in turn, will lead to a longer life of the road bridge, it is expected not only to be industrially usable but also to make a great social contribution. It can be said that the invention is obtained.

DESCRIPTION OF SYMBOLS 100 Construction yard 110 Construction section 200 Erection girder type lifting device 210 Erection girder 210 (for erection girder type lifting device) 210a Dividing member 211 (for erection girder) Main body girder 212 (for erection girder) Rail girder 300 Winch type lifting device 300a First winch type lifting device 300b Second winch type lifting device 400 Suspension load mechanism 410 Suspension rope 420 (Suspension load mechanism) Mobile locking means 430 ( Lifting jig 500) Lifter 500ma First main lifter 500sa First sublifter 500mb Second main lifter 500sb Second sublifter 510 (lifter) column 520 (lifter) gantry 530 (lifter) suspension lock Tool 540 (lifter's) traffic space 550 (lifter's) connecting beam Tr Lorry DL Dolly

Claims (20)

A method in which a predetermined section using a part of a road bridge is set as a construction yard, and the components of the road bridge are updated in the construction section in the construction yard using a lifting device installed in the construction yard Because
The lifting device includes a lifter, a erection girder, and a hanging load mechanism,
The lifter includes four struts that support a load and can be vertically expanded and contracted, and a gantry coupled to the top of the four struts, and has a traffic space through which a truck can pass. Have
The erection girder is fixed to the gantry of the two or more lifters, and spans between the lifters,
The suspension load mechanism has a suspension rope, a suspension jig fixed to the tip of the suspension rope, and a power means, and is attached to the installation girder so as to traverse along the installation girder,
Furthermore, the lifting device is installed so that the installation girder is arranged above the construction section,
A lifting device construction step of constructing the lifting device;
A removal step of removing the components of the road bridge in the construction section;
The removal member removed in the removal step is lifted by the lifting device, and the hanging load mechanism that grips the removal member is traversed along the installation girder, and the removal member is moved to the lorry by the lifting device. A removal member loading process for hanging,
The lifting device construction process includes:
A lifter installation step in which a truck equipped with one lifter carries the lifter to a predetermined position around the construction section and installs the two lifters so as to sandwich the construction section;
A step of carrying in the installation girder to which the suspension load mechanism is attached, or the installation girder separate from the suspension load mechanism;
Fixing both ends of the erection girder to the gantry of each of the lifters arranged across the construction section;
Extending the struts of the two lifters and jacking up.
The member update method using the lifting apparatus characterized by the above-mentioned. The construction yard is set so that the construction section is located on the rear side of the construction yard,
In the lifter installation step, the truck mounted with the lifter enters from the rear of the construction yard without entering from a lane different from the lane in which the construction yard is set,
In the removal member loading step, the removal member is hung on a truck that has retreated to the front of the construction section.
The freight vehicle in the lifter installation step and the freight vehicle in the removal member loading step move in the construction yard in a front-facing state.
The member renewal method using the lifting apparatus of Claim 1 characterized by the above-mentioned. In the removal member loading step, using the hanging load mechanism, the removal member is lifted and the removal member is suspended.
The member renewal method using the lifting apparatus of Claim 1 or Claim 2 characterized by the above-mentioned. In the removal member loading step, by lifting and lowering the lifter, the removal member is lifted and the removal member is suspended.
A member updating method using the lifting device according to any one of claims 1 to 3. The newly installed member mounted on the lorry that has retreated to the front of the construction section is lifted by the lifting device, and the suspended load mechanism that grips the newly installed member traverses along the installation girder, A new installation process in which the new member is suspended and installed at the planned position of the construction section with a heavy device,
In addition,
The lorry in the new process moves in the construction yard in a front-facing state.
A member renewal method using the lifting apparatus according to any one of claims 1 to 4. In the new installation step, the new load member mechanism is used to lift the new member and to suspend the new member.
The member renewal method using the lifting apparatus of Claim 5 characterized by the above-mentioned. In the new installation step, by lifting and lowering the lifter, the new member is suspended and the new member is suspended.
The member renewal method using the lifting apparatus of Claim 5 or Claim 6 characterized by the above-mentioned. A predetermined section using a part of the road bridge is set as a construction yard, and the construction section in the construction yard is used by using the first lifting device and the second lifting device installed in the construction yard. The method of updating the components of the road bridge with
The first lifting device and the second lifting device include a lifter and a suspended load mechanism,
The lifter includes four support columns that support a load and can be expanded and contracted vertically, and has a passage space through which a lorry can pass,
The hanging load mechanism has a hanging rope, a hanging jig fixed to the tip of the hanging rope, and power means,
A removal step of removing the components of the road bridge in the construction section;
A removal member loading step of hanging the removal member removed in the removal step on a truck,
With
The removal member loading step includes
Both removal member suspension steps of lifting the removal member held by the suspension jig by winding the suspension ropes by the power means of the first lifting device and the second lifting device. When,
In the state where the removal member is lifted by the power means of the first lifting device, the power means of the second lifting device lowers the suspension rope, thereby removing the removal member from the first lifting device. A removal member moving step for moving to the lower part of the lifting device;
A removal member piece unloading step of hanging the removal member on a truck with the first lifting device,
The member update method using the lifting apparatus characterized by the above-mentioned. A new installation step of hanging and installing a new member mounted on the truck at the planned position of the construction section,
The new installation process
While lifting the suspension rope by the power means of the first lifting device and the second lifting device, the new member gripped by the suspension jig is lifted from the truck, A new member both-hanging process in which the lorry moves outside the construction section;
In a state where the new member is lifted by the power means of the first lifting device, the power member of the second lifting device lowers the suspension rope to lower the new member. A new member moving process for moving to the lower part of the heavy equipment;
In the first lifting device, a new member piece lowering step of hanging the new member to the planned position of the construction section,
The member renewal method using the lifting apparatus of Claim 8 characterized by the above-mentioned. A method in which a predetermined section using a part of a road bridge is set as a construction yard, and the components of the road bridge are updated in the construction section in the construction yard using a lifting device installed in the construction yard Because
The lifting device includes four or more lifters, a construction girder, and two or more suspension mechanisms,
The lifter includes four struts that support a load and can be vertically expanded and contracted, and a gantry coupled to the top of the four struts, and has a traffic space through which a truck can pass. Have
Further, among the four or more lifters, the first sub-lifter and the second sub-lifter are arranged across the construction section, the first main lifter is arranged between the first sub-lifter and the construction section, Two main lifters are arranged between the second sub-lifter and the construction section;
The erection girder is fixed to the gantry of the first main lifter and the second main lifter and spanned between the lifters,
The suspension load mechanism has a suspension rope, a suspension jig fixed to the tip of the suspension rope, and a power means, and is attached to the installation girder so as to traverse along the installation girder,
A removal step of removing the components of the road bridge in the construction section;
The removal member removed in the removal step is lifted by the lifting device, and the suspension mechanism that grips the removal member is traversed along the installation girder, and one end of the removal member is suspended from the lorry. And a first refilling step of supporting the removal member by the suspended load mechanism and the cargo vehicle,
The cargo vehicle supporting one end of the removal member moves, and the suspension mechanism that grips the removal member moves along the installation girder so that a part of the removal member becomes the first sub-lifter. A second refilling step of transporting the removal member until it is located below and transferring support of one end of the removal member from the truck to the first sub-lifter;
A removal member loading step of hanging the removal member supported by the suspension mechanism and the first sub-lifter on a lorry moved to a position below the removal member;
A member updating method using a lifting device. In the first refilling step, using the hanging load mechanism, the removal member is lifted and the removal member is suspended,
The member renewal method using the lifting apparatus of Claim 10 characterized by the above-mentioned. In the removal member loading step, by lifting and lowering the lifter, the removal member is lifted and the removal member is suspended.
The member renewal method using the lifting apparatus of Claim 10 or Claim 11 characterized by the above-mentioned. A new member lifting step of lifting a new member transported to the lower side of the second main lifter and the second sub lifter from the lorry by the suspension mechanism and the second sub lifter;
By suspending one end of the new member on the cargo vehicle, the support of the one end of the new member is transferred from the second sub-lifter to the cargo vehicle, and the new member is supported by the suspension mechanism and the cargo vehicle. 3 refilling steps;
As the lorry supporting one end of the new member moves and the hanging load mechanism that grips the new member traverses along the erection girder, a part of the new member becomes below the erection girder. A fourth refilling step of transporting the new member until it is located at a position, and transferring support of one end of the new member from the truck to the suspension mechanism;
A new installation step in which the hanging load mechanism that grips the new member along the installation girder is traversed, and the new member is suspended and installed at the planned position of the construction section by the lifting device,
The member update method using the lifting apparatus according to any one of claims 10 to 12, further comprising: A method in which a predetermined section using a part of a road bridge is set as a construction yard, and the components of the road bridge are updated in the construction section in the construction yard using a lifting device installed in the construction yard Because
The lifting device includes four or more lifters, a construction girder, and a hanging load mechanism.
The lifter includes four struts that support a load and can be vertically expanded and contracted, and a gantry coupled to the top of the four struts, and has a traffic space through which a truck can pass. Have
Further, among the four or more lifters, the first sub-lifter and the second sub-lifter are arranged across the construction section, the first main lifter is arranged between the first sub-lifter and the construction section, Two main lifters are arranged between the second sub-lifter and the construction section;
The erection girder is fixed to the gantry of the three or more lifters including the first main lifter and the second main lifter, and is spanned between the lifters.
The suspension load mechanism has a suspension rope, a suspension jig fixed to the tip of the suspension rope, and a power means, and is attached to the installation girder so as to traverse along the installation girder,
A removal step of removing the components of the road bridge in the construction section;
A first installation girder installation step of bridging the installation girder to the first main lifter, the second main lifter and the first sub-lifter;
The removal member removed in the removal step is lifted by the lifting device, and the removal member is moved along the installation beam spanned over the first main lifter, the second main lifter, and the first sub lifter. The removal member loading process in which the suspended load mechanism that has been gripped is traversed, and the removal member is suspended from the lorry by the lifting device;
A member updating method using a lifting device. A second installation girder installation step of bridging the installation girder to the first main lifter, the second main lifter and the second sub-lifter;
A new member mounted on the lorry is lifted by the lifting device, and the new member is moved along the construction beam spanned by the first main lifter, the second main lifter, and the second sub lifter. A new installation step in which the suspended load mechanism that has been gripped is traversed, and the new member is suspended and installed at the planned position of the construction section by the lifting device,
The member update method using the lifting apparatus according to claim 14, further comprising: A method in which a predetermined section using a part of a road bridge is set as a construction yard, and the components of the road bridge are updated in the construction section in the construction yard using a lifting device installed in the construction yard Because
The lifting device includes four or more lifters, a construction girder, and a hanging load mechanism.
The lifter includes four struts that support a load and can be vertically expanded and contracted, and a gantry coupled to the top of the four struts, and has a traffic space through which a truck can pass. Have
Further, among the four or more lifters, the first sub-lifter and the second sub-lifter are arranged across the construction section, the first main lifter is arranged between the first sub-lifter and the construction section, Two main lifters are arranged between the second sub-lifter and the construction section;
The erection girder is fixed to the gantry of the first sub-lifter, the first main lifter, the second main lifter and the second sub-lifter and bridged between the lifters,
The suspension load mechanism has a suspension rope, a suspension jig fixed to the tip of the suspension rope, and a power means, and is attached to the installation girder so as to traverse along the installation girder,
A removal step of removing the components of the road bridge in the construction section;
The removal member removed in the removal step is lifted by the lifting device, and the hanging load mechanism that grips the removal member is traversed along the erection girder, and the lifting member is moved to the lorry by the lifting device. A removal member loading process for hanging,
A member updating method using a lifting device. The newly installed member mounted on the lorry is lifted by the lifting device, and the suspended load mechanism that grips the newly installed member along the erection girder is traversed, and the lifting member lifts the new member to the construction section. New installation process to hang and install at the planned position of
The member renewal method using the lifting apparatus according to claim 16, further comprising: In the removal member loading step, using the hanging load mechanism, the removal member is lifted and the removal member is suspended.
A member updating method using the lifting apparatus according to any one of claims 14 to 17. In the removal member loading step, by lifting and lowering the lifter, the removal member is lifted and the removal member is suspended.
A member renewal method using the lifting apparatus according to any one of claims 14 to 18. The lifter has two connecting beams, two of the four support columns are connected by one connecting beam, and the four support columns can be vertically expanded and The connecting beam is extendable to the left and right,
The lifter is mounted on a truck and is carried into the construction yard, and on the platform of the truck that has stopped at a predetermined position, the two connecting beams extend to the outside of the platform, and further, A lifter installation process in which the lower end of the four pillars touches the road surface by extending the pillar downward, and the lorry moves when the lifter is self-supporting on the road surface,
The member update method using the lifting apparatus according to any one of claims 1 to 19, further comprising:

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