JP2994935B2 - Bridge overhang erection method and equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bridge erection method and a bridge erection method suitable for erection and construction of a bridge, particularly in a mountainous area where there is little flat land.

[0002]

2. Description of the Related Art A conventional overhanging construction of a bridge in a place with little mountainous flat land will be described.
4 As shown in the plan view, 1 is a pier constructed on a sloped area between mountains, 2 is a diagonal vent reinforced above the pier 1, 2 'is a temporary vent for construction, 3 is a tower erected near the pier 1. Crane, 4 is a pier temporarily installed near the lower part of the pier, 5 is a transport truck, 6a is a single truss girder suspended from the pier 4 by the tower crane 3, and 6 is a single truss 6a on the pier
And a pair of front and rear traveler cranes 7 mounted near the ends of the truss girders so as to move in combination with rails provided on the existing truss girders 8.
Moves on an existing truss girder between the two traveler cranes 7 and 7, transports the single lumber 6 a lifted by the tower crane 3 to the position of the traveler crane 7, and mounts a generator used on a pier. It is a transport trolley. To overhang the bridge, a single material 6a is lifted from the pier 4 on the ground onto the pier 1 by the tower crane 3, transported to the vicinity of the traveler crane 7 by the transport trolley 8, and one single material on the trolley 8 is transported by the traveler crane 7. A single profession, which is lifted and transported to a predetermined position, stands by near the installation location, positions and attaches the single piece 6a, and when the erection of one span of the truss girder 6 is completed, the rail on the bridge surface is removed. As a guide, the traveler crane 7 is moved to the next erection location on the tip side of one span girder, and the same operation is repeated.

[0003]

However, in the above-mentioned conventional method, heavy construction equipment such as a traveler crane 7 having a weight of 50 tons or a plurality of transport vehicles 8 having a weight of 10 tons is being constructed. In order to support the truss girder 6 and move it, it is necessary to provide a temporary vent 2 ' or the like at a short interval to support the existing truss girder 6 or to reinforce the truss girder itself. In addition, single material 6
Since the truss girders 6 are erected by aligning and joining one by one, the efficiency is poor and the construction period is prolonged. Further, since the members are lifted and turned by the traveler crane 7, there is a large danger on windy days or rainy days, and work cannot be performed. further,
Since the body of the traveler crane is heavy, it takes time to install and disassemble it.

[0004] The present invention has been proposed in view of such circumstances, and the weight of the erection equipment used on a high-rise bridge girder for overhanging a bridge can be reduced, and the invention can be applied to a construction site with little flat ground. It is an object of the present invention to provide a safe, quick and economical bridge overhanging erection method and apparatus which can be partially erected in units of a facing block and reduce work interruption due to weather.

[0005]

A bridge according to claim 1 for that purpose.
The beam overhanging erection method is to install a movable overhanging structure that is erected on the upper end of the pier and is slidable in the front-rear direction along the upper end of the existing truss girder that extends in the front-rear direction. Overhead traveling crane that can travel in the front-rear direction, front and rear width-adjusting rails that are supported on the overhang of the movable overhanging frame, and parallel truss girder units along the upper edge of the existing truss girder. A surface material transporting means for movably straddling and a single material transport vehicle movable in the front-rear direction along the upper surface of the existing truss girder are temporarily disposed, and the unit of the truss girder assembled near the lower part of the pier is It is lifted on the pier by a tower crane or the like erected near the pier, straddles the upper edge of the existing truss girder, moves by indexing, etc., and is transferred onto the width-adjusting rail, and the width is adjusted. Moving and indexing of rail width This is positioned and joined to the girder end of the existing truss girder, and on the other hand, the connecting single material lifted by the tower crane is placed on the single material carrier and horizontally transferred into the movable overhang frame, And transporting and joining the single material on the bogie in units of the truss girder.

[0006] A bridge overhang erection device according to claim 2 is
Existing on the upper end of the pier and overhanging in the front-rear direction
On the truss girder, it is slidable forward and backward along its upper end.
The movable overhang frame and the inside of the movable overhang frame
Overhead crane that can travel in
Front-to-back width adjustment rail supported by the overhang to allow width adjustment
Along the upper edge of the existing truss girder
Surface material conveying means for straddling the position so as to be movable in parallel
A single unit that can move back and forth along the top of the existing truss girder
Material transport trolley and surface truss assembled near the lower part of the pier
In order to lift the beam unit on the pier,
A tower crane set up next to the existing truss girder
Move the above truss girder unit straddling the upper edge
Indexing means for transferring to the rails
In addition, the first rail for moving the truss girder unit on the existing truss girder and the second rail for the single-material carrier truck
When the removable coupling means between Matagano means and the operating wire to be engaged with the first rail and transversely shifting rail above, and a ceiling crane is Tate設to the movable projecting rack 構上, upper Symbol second rails and engaging combined, characterized in that comprises a single material transport carriage for transporting the coupling single material onto Symbol movable overhanging rack premises moved by the operation wire or the like on existing truss digits.

[0007]

According to such a configuration, the overhanging erection equipment is
A movable overhang frame having a relatively low height, an overhead crane moving in the front-rear direction in the frame, a small single-material carrier, and rails, straddling means using the upper edge of the truss girder, It is composed of a moving operation wire and a surface material conveying means having a bridge surface height including a width approaching rail provided on an overhanging member of an overhang frame, so that the entire facility is low in weight and lightweight. The truss bridge girder is a 1-span pre-designed truss girder of a fixed shape unit, which is laid on the ground to form a truss girder unit. Straddle the rail, transfer it horizontally to the tip of the overhanging frame by indexing, transfer it to the width-aligning rail, and install the truss girder unit by traverse feed (width alignment) and indexing adjustment. Align and join the ends of the truss girders. During this time, the connecting members between the pair of truss girder units are lifted and transported from the ground to the height on the pier by the tower crane in single materials, loaded on the single-material carrier, and extended along the bridge rails. It is fed horizontally to a position inside the tip of the frame, and the connecting single material is transported between the pair of joined truss girder units by using an overhead crane in the overhanging frame, and positioning and joining are performed by the hand of a professional. For this reason, the main truss surface assembling portion can be conveyed to the erection site from the ground in block units, positioned and assembled, and the efficiency of erection of the bridge girder is significantly improved. In addition, the overhang frame can be provided with a roof on the top surface or a windshield sheet around it, and the connecting material is transported to the mounting position by moving, turning, or traversing the overhead crane in the overhang frame. It is possible to safely perform the erection work even in strong winds or rainy weather.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the above figures, the same parts as in the prior art are denoted by the same reference numerals as in FIGS. 13 and 14, and the duplicate description will be omitted. First, the equipment used in the present invention will be described. In FIG. 1, reference numeral 10a denotes a truss girder unit previously assembled on the ground;
a and the connecting members between them are lifted from the ground onto the pier 1 by the tower crane 3, and the existing truss girder assembled and permanently installed on the pier 1, 11 is related to the rail provided on the bridge surface of the existing truss girder 10. In addition, a movable overhanging frame which is mounted so as to be slidably overhangable in the front-rear direction and has a below-described overhead crane and a width approach rail, 12 is a bridge surface from a position on the pier 1 to a tip end position of each overhanging frame 11. A connecting single-material carrier truck movably provided along the upper rail, 13 is a truss girder unit 10a which is mounted on the tower crane 3 and straddles the upper edge rail of the existing truss girder 10 along the existing truss girder 10. This is a surface material horizontal transport means for horizontally transporting the surface material.

FIGS. 2 and 3 are an enlarged side view and a plan view, respectively, of the movable overhang frame 11 shown in FIG. 1, and 15 is provided on the outermost portion of the truss girder unit 10a in the longitudinal direction. The first rails 16 for unit movement of the truss girder unit are second rails provided inside the first rail 15 for moving the single material carrier 12 and the movable overhang frame 11. Movable overhang frame 11
Are four shoe sections 17 at the middle and rear ends, respectively (FIG. 10).
11), ride on the second rail 16 and hold it on the pair of left and right second rails 16 (FIG. 4) by a pair of left and right rollers 18 shown in FIG. 10 and connect to the shoe part 17 shown in FIG. The hydraulic cylinder 19 and the rail clamp 20 which is connected to the hydraulic cylinder 19 and detachably couples to the second rail 16 slidably move like a scale, and the rear end side is separated from another rail clamp 21 and the existing truss girder 10. With the fixed stopper 24 connected with the eye plate 22 and the pin 23 shown in FIG.
A vertical hydraulic jack 25 is provided at the rear end of the vertical hydraulic jack 25 so as to be fixed for each span movement, and is in contact with a rail surface for height adjustment.

Returning to FIGS. 2 and 3, reference numeral 27 denotes a traveling drive motor 28 and an endless wire 2 mounted on the upper part of the movable overhang frame 11.
An overhead crane provided so as to be able to travel through the frame 9, a pair of left and right width shifting rails movably supported in the width direction on the overhanging portion side of the movable overhanging frame 11, and 31 is provided at the top of the movable overhanging frame 11 It is a roof. As shown in FIG. 3, the single-material carrier vehicle 12 rides across the second rail 16 on the existing truss girder 10 and the central rail 16 a provided at the center of the truss girder 10, and rides on the endless operation wire 32. As shown in FIG. 1, the movable overhang is provided so as to move between the tip of the frame and the upper end of the pier, and the single-material carrier 12 has a pair of parallel sliding rails 33 ( 3), and a movable carrier 12a is provided that is movable in the front-rear direction relative to the vehicle by driving the endless operation wire 34.

In FIG. 2, the truss truss girder unit 10a is formed into a U-shaped truss girder unit including a diagonal material, as indicated by a dashed line on the left side. At each location, a straddling means 35 which will be described later and which engages with the first rail 15 and the width approaching rail 30 is provided. The faced truss girder unit 10a is detachably connected to guide sheaves 36 and 37 fixedly attached to the width approaching rail 30 and an operation wire 39 extending through a sheave 38 on the existing truss girder 10, and indexed to the first rail 15 by indexing. The truss girder moves upward and moves onto the width approaching rail 30 at the tip of the existing truss girder 10. In this case, the face material horizontal transfer means 13 shown in FIG. 1 is mainly composed of the first rail 15, the width approach rail 30, the straddling means 35, and the operation wire 39 for moving the face material truss girder. Things.

FIG. 4 shows a cross section taken along the line IVA-IVA and a cross section taken along the line IVB-IVB of FIG. 2 in a left half and a right half.
The overhead crane 27 has a traveling carriage 27c, which is driven by a transverse motor 27b, mounted on a traveling girder 27a. The transverse carriage 27c has a swing motor 27d and a swing mechanism 27e.
Is provided with a swing suspension beam 27g having a hoisting machine 27f that is swingably supported through the shaft. 4 and 5, the straddling means 35 is provided in an L-shape at the upper end of the truss girder unit 10a, and on the existing truss girder 10, as shown in the right half of FIG. , A cantilever is supported on the first rail 15, and a slide leg 61 is temporarily provided at a lower end of the first truss girder 10 by a chill tank 62 at a lower end of the suspension leg 60 and a clamp spring. 4 is slidably supported at the front end of the existing truss girder 10, as shown in the right half of FIG. 4, via a wheel 41 (FIG. 5) provided at an L-shaped corner portion. Then, the spar is transferred to a position above the dashed line 30 to support the girder surface in a vertical posture from the position of the dashed line to the position of the solid line. In addition, 10e-10h of FIG. 4 has shown the connection single material joined between the right and left faced truss girder units 10a.

FIG. 5 shows a detailed cross section of the above-mentioned straddling device 35 and the width shifting rail 30. Facade truss girder unit 10
a shows a supporting material 42 on the lower surface of the upper chord material 10b at the time of face assembly.
Are attached at intervals, and an I-shaped girder 43 is arranged on the outer end of the support member 42, and the first rail 15 is laid on the I-shaped girder 43. The straddling means 35 is provided on the upper surface of the upper chord member 10b at the same position.
The straddling means 35 includes the wheel 40 which engages with the first rail 15 on the existing truss girder 10 at the tip of an arm 45 fixed to the upper chord member 10b in an L shape, and the lower surface of the head portion of the first rail 15 A pair of guide rollers 46 shown in FIG. 6 which are arranged in a C-shape so as to embrace them, and a pair of left and right The wheel 41 and a coupling portion 47 provided on the side of the wheel 41 so as to be attached to and detached from the indexing operation wire 39 (FIG. 3).

5 and FIGS. 7 to
As shown in FIG. 8, one end is fixed to the lower horizontal member 11a of the overhang portion of the movable overhanging frame 11, and the other end is supported by the hanging member 11b.
And a bogie frame 50 movably engaged in the longitudinal direction thereof via wheels 49, and supported vertically movably on the bogie frame 50 via a pair of left and right vertical screws 52 of a screw drive motor 51. A rail suspension member 53 connected to the upper chord by bolts or the like, sheaves 54 and 55 provided at both ends of the I-beam 48, a small drum 57 provided on the I-beam 48 and driven by a motor 56 for width adjustment, and the same drum A width-adjusting drive wire 58 connected to the left and right ends of the bogie frame 50 through the sheaves 54 and 55 in a cross winding from 57 is provided, and the width-adjusting rail 30 is configured to be able to move in parallel in the vertical and width directions.

Next, FIG. 12 shows a work flow of the bridge overhang erection of the present invention performed by using the above-described various devices. Hereinafter, the erection method will be described with reference to the flow of FIG. On the ground such as on the ground mount 4 near the lower part of the pier 1, the designed truss girder unit 10a of a predetermined shape is mounted in advance with the straddling means 35, the first rail 15, the second rail 16 and the like. Several faced truss girder units 10a to be assembled and assembled on the pier 1 are lifted onto the pier 1 by the tower crane 3 and aligned and joined on the oblique vent 2 of the pier 1 to assemble. The truss girder 10 at this location is permanently installed.

On the existing truss girders 10 of several spans, the overhanging frame 11 prepared in advance from the ground, the overhead crane 27, the overhanging rail equipment 30,
Single material carrier 12 and operation wires 32, 34, 39
Are individually or combined and lifted from the ground by the tower crane 3 for mounting, and preparation for overhang erection is performed.

Under this condition, the truss girder unit 10a laid from the ground is lifted up by the tower crane 3, and is set on the first rail 15 of the existing truss girder, and is detachably connected to the operation wire 39. The part 47 is connected.

The truss girder unit 10a connected to the operation wire 39 is indexed and moved toward the end of the existing truss girder by the operation of the operation wire 39, and the rail truss 30 on the frame 11 overhangs from the end of the existing truss girder. Then, the truss girder unit 10a is aligned with the end of the existing truss girder 10 and joined by adjusting the width of the width-adjusting rail 30 and adjusting the operation wire 39.

On the other hand, during this time, the tower crane 3
The connecting members 10e to 10h are lifted from the ground, loaded on the truck carrier 12a of the carrier carrier 12, and the operating wires 3 are connected.
2 and 34, the bogie carrier 1 is placed in the rear of the overhang frame 11.
After the joining of the left and right faced truss girder units 10a to the existing truss girder end 10 is completed, the overhead crane 27 connects the truss girder unit 10a from the bogie carrier 12a to the single material 10e.
10h truss girder unit 10a with left and right sides joined in order
Align and join between.

In this state, the overhanging of the truss girder 10 of one span is completed, and the fixed stopper 24 of the overhanging frame 11 is
Is released, the rail clamps 20, 21 are loosened, the hydraulic cylinder 10 is contracted, the rail clamp 20 is grasped and connected, and then the operation of extending the hydraulic cylinder 19 is repeated, so that the overhanging frame 11 is moved one span at a time by the existing truss girder. 10, the clamps 20 and 21 and the fixed stopper 24 are connected and fixed, and the process returns to the lifting of the truss girder unit 10a again, and the same overhanging construction is repeated.

[0021]

According to the above-mentioned equipment, the overhang frame 11
Requires only a minimum lift of the overhead crane 27, so the height can be reduced, and even if the overhead crane 27 and the width-shifting rail 30 device are included, compared with the conventional traveling crane. The equipment can be remarkably lightened.

Also, the single-material carrier trolley 12 is connected to the single-material carrier 10.
Since only e to 10h are transported, the size and weight are reduced. In addition, as shown in FIG. 2, the overhanging frame 11 can be easily provided with a roof cover as necessary, and it is also easy to provide wind and rain avoidance sheets on the tip side and both sides, The installation work can be safely and efficiently performed within the overhang frame 11 even in the event of wind and rain.

Further, the pier 1 of the truss girder unit 10a is used.
The horizontal transport above is supported by straddling the rails on the existing truss girder, and is moved by operating wires etc. without inversion. Therefore, there is no need to use a large crane or transport truck on the pier 1, and Can be constructed very easily and efficiently.

In short, a movable overhanging frame that is erected on the upper end of the pier and that is slidable in the front-rear direction along the upper end of the existing truss girder extending in the front-rear direction is provided. An overhead traveling crane that can run in the front-rear direction, a front-rear rail that can be moved to the overhang of the movable overhanging frame, and a parallel truss girder unit moving along the upper edge of the existing truss girder. A surface material transporting means for hopping over the truss girder and a single material carrier trolley movable in the front-rear direction along the upper surface of the existing truss girder are temporarily arranged, and the truss girder unit assembled near the lower part of the pier is used as the pier. Hoisted on the pier with a tower crane etc.
It is straddled on the upper edge of the existing truss girder, moved by indexing, etc., and transferred onto the width-shifting rail, and is moved to the end of the existing truss girder by shifting and indexing of the width-shifting rail. On the other hand, the connecting single material lifted by the tower crane is placed on the single material transporting trolley and horizontally transferred into the movable overhang frame, and the single material on the trolley is moved to the surface by the overhead crane. By transporting and joining in truss girder units, the transportation and erection means used on high bridge girder for overhanging the bridge are significantly reduced in size and weight as compared with the conventional method, and lifting equipment and equipment are lifted. even in large mountainous erection of bridges, conveying a major order portion of the surface assembly blocks, to allow easily erection, further, reduces the cross-sectional in the work at the time of wind and rain, efficiently flared erection in a short period of time Row From getting economical bridge overhang erection method of safe working and construction time makes it possible, the present invention is extremely useful industrially.

According to the second aspect of the present invention, the top of the pier is
It is mounted on the existing truss girder that is
Movable tension slidable in the front-rear direction along the upper end of the
It can run in the front and rear direction on the extension frame and the movable overhang frame
To the overhanging crane and the overhang of the movable overhang frame
Front and rear width support rails that are supported
Move the truss girder units in parallel along the upper edge of the truss girder.
A surface material transporting means for movably climbing and moving;
A single-material carrier that can move in the front-rear direction along the upper surface of the girder
And the truss girder unit assembled near the pier lower part
To be lifted on the pier, it should be standing near the pier.
Tower crane and the upper edge of the existing truss girder
Move the above truss girder unit on the
With indexing means to transfer to the article
To, engaged with the second rail for the first rail and Tanzai transport carriage for face sets truss girder unit movement provided to the existing truss digits on, on the above <br/> first rail and transversely shifting rail to a detachable coupling means between Matagano means and the operation wire, the movable projecting rack and a ceiling crane is Tate設in 構上, upper SL on the second rail engaging moved by the operation wire or the like on the existing truss digits By providing a single-material carrier to transport the single material for connection into the movable overhang frame, the transport and erection means used on the bridge girder at a high place for the overhanging of the bridge are compared with the conventional method. In the construction of a mountain bridge with a significant reduction in size and weight and a large lifting lift for equipment and equipment, the main girder part can be easily transported and erected in units of faced blocks. It reduces the cross-sectional, be performed efficiently overhanging erection in a short period of time Possible safe working and from getting economical bridge overhang erection device construction time is, the present invention is extremely useful industrially.

[Brief description of the drawings]

FIG. 1 is a side view showing an outline of an overhang erection method and an apparatus thereof according to an embodiment of the present invention.

FIG. 2 is an enlarged side view showing a main part of FIG.

FIG. 3 is a plan view taken along the line III-III of FIG. 2;

FIG. 4 is a transverse sectional view showing a cross section taken along line IVA-IVA and IVB-IVB in FIG. 2 in right and left halves.

FIG. 5 is an enlarged view showing the vicinity of the riding device and the width approach rail of FIG. 4;

FIG. 6 is a transverse sectional view showing a back portion of a VI section in FIG. 5;

FIG. 7 is an enlarged view showing a portion VII in FIG. 5;

FIG. 8 is a side view taken along arrow VIII-VIII in FIG. 7;

FIG. 9 is a side view showing the rear half of the overhang frame of FIG. 1;

FIG. 10 is a cross-sectional view taken along the line XX of FIG. 9;

11 is a cross-sectional view taken along the line XI-XI in FIG.

FIG. 12 is a flowchart showing the work order of the method according to the present invention.

FIG. 13 is a schematic side view showing a conventional bridge overhang method and its equipment.

FIG. 14 is a plan view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bridge pier 2 Inclined vent 3 Tower crane 4 Ground stand (pier) 5 Transportation truck 6 Truss girder 6a Single material 10 Existing truss girder 10a Facade truss girder unit 10b Truss girder upper chord material 10e to 10h Connecting single material 11 Movable overhang frame 11a Lower horizontal member 11b Suspended member 12 Single material carrier 12a Truck carrier 13 Surface material horizontal transport means 15 First rail 16 Second rail 16a Central rail 17 Overhanging frame shoe 18, 46 Guide roller 19 Hydraulic cylinder 20, 21 Rail clamp Reference Signs List 22 Eye plate 23 Pin 24 Fixed stopper 25 Hydraulic jack 27 Overhead crane 27a Traveling girder 27b Traversing motor 27c Traversing trolley 27d Rotating motor 27e Rotating mechanism 27f Hoisting machine 27g Rotating suspension beam 28 Traveling drive motor 29 Endless wire 30 Width rail 31 Roots 32, 34, 39 Endless operation wire 33 Sliding rail 35 Riding means 36, 37, 38 Sheave 40, 41, 49 Wheel 42 Support material 43 I-shaped garter 45 Arm 46 Guide roller 47 Wire attaching / detaching joint 48 I beam 49 Wheel Reference Signs List 50 bogie frame 51 screw drive motor 52 vertical screw 53 rail suspension member 54, 55 sheaves at both ends of I-beam 56 motor for width adjustment 57 small drum 58 width adjustment drive wire 60 hanging cable 61 slide leg 62 chill tank

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinji Nakatani 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Mitsubishi Heavy Industries, Ltd. Hiroshima Works (58) Field surveyed (Int. Cl. ⁶ , DB name) E01D 21/00

Claims (2)

(57) [Claims] 1. A movable overhanging frame which is erected on an upper end of a pier and is slidable in a front-rear direction along an upper end of an existing truss girder extending in a front-rear direction. An overhead traveling crane that can run in the front-rear direction, a front-rear rail that can be moved to the overhang of the movable overhanging frame, and a parallel truss girder unit moving along the upper edge of the existing truss girder. A surface material transporting means for hopping over the truss girder and a single material carrier trolley movable in the front-rear direction along the upper surface of the existing truss girder are temporarily arranged, and the truss girder unit assembled near the lower part of the pier is used as the pier. Lifted on the pier by a tower crane or the like erected near the truss, laid on the upper edge of the existing truss girder, moved by indexing, etc., and transferred onto the width-adjusting rail, By moving the index and indexing It is positioned and joined to the end of the existing truss girder, while the connecting single material lifted by the tower crane is placed on the single material carrier and horizontally transported into the movable overhanging frame, and is then moved by the overhead crane. and wherein the joining conveying the single member on the carriage on the surface of sets truss girder units, bridges RyoCho out rack 設工 method. 2. An upper part of the bridge pier is provided on the upper end of the pier,
Along the overhanging existing truss girder along its upper end
A movable overhang frame slidably mounted on the
Overhead crane that can travel in the front and rear direction inside the frame
Before and after supported by the overhang of the dynamic overhang frame
Along the upper rails of the existing truss girder
Move the truss girder unit in parallel so that it can move in parallel
Back and forth along the upper surface of the existing truss girders
A single-material carrier that can move in the direction
Lift the assembled truss girder unit on the above pier
A tower crane standing near the pier,
The above-mentioned truss truss straddling the upper edge of the existing truss girder
A cable for moving the girder unit and transferring it to the rail
A pulling means, a first rail for moving the truss girder unit on the existing truss girder and a second rail for the single-material carrier truck , and the first rail and the width shifting rail. Attaching and detaching coupling means with the mating riding means and the operation wire ;
And a ceiling crane is Tate設to the movable projecting rack 構上, upper <br/> Symbol coupling single material onto Symbol movable projecting racks premises second rail engaging moved by the operation wire or the like on the existing truss digits characterized in that comprises a single material transport carriage for transporting a bridge RyoCho out <br/> to call 設装 location.