KR100304538B1 - Traveling equipment of truck for works on lower part of bridge - Google Patents

Abstract

PURPOSE: Traveling equipment of a truck for works on the lower part of a bridge is provided to let a truck support steadily and travel smoothly. CONSTITUTION: The traveling equipment of a truck for works on the lower part of a bridge comprises: right and left traveling equipment(10) supporting the whole of a truck to outer wing parts(Sa,Sd) of two main girders(S1,S2) and moving along a bridge: right and left outer workbenches(20) installed on the upper part of the traveling equipment(10) to support the whole of trucks in a suspension method: right and left rotation bearing device(30) installed vertically to the right and left outer workbenches(20) and rotated in a 90-degree arc. by a rotary driving device(40); right and left lower workbenches(50,51) rotating truss members not to be interfered by piers(Pr1,Pr2) by rotating the rotating bearing devices(30) in a 90-degree arc. with the rotary driving device(40): and right and left inner workbenches(70) regulable on the tip of the lower workbenches(50,51).

Description

Driving device for bridge undercarriage

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling device of a bridge underbody work cart for various operations performed on a lower surface of a bridge at the time of construction or completion of various bridges.

In the construction of various bridges, there are various operations performed at the bottom of the bridge during or after construction. Especially for bridges that are constructed by continuously assembling unit assembly members of a certain length, such as PC (prestressed concrete) bridges, steel box beam bridges, etc., the joint work, assembly work, epoxy treatment, painting work, shoe inspection, shoe There is a lot of work to be done on the bottom side such as replacement work, bottom inspection, inspection, and repair.

However, since PC bridges and forced box beam bridges do not have any structure other than the bridges on the lower surface of the bridges, a work platform is required to carry out the above-described work under the bridges. In the state where the main girder is installed in the pier, the work platform is provided to move freely above and below both sides of the cantilever, and is installed across the lower surface of the mold. It is a device provided for use as a workbench for the workbench and a permanent workbench for carrying out maintenance work and inspection work after the completion of the bridge.

The bridge undercarriage type is based on the configuration of the moving device, and the upper surface driving type uses the upper surface of both wing parts of the mold as the driving surface, and the lower surface driving type runs while supporting the entire work cart on the lower part of the both wing parts of the mold. Each type includes a traveling device for moving the whole work cart along the bridge, a supporting device for supporting the whole work cart on the traveling device, and a rotational support for rotating the lower work platform for the support device. It is supported by the device and the rotary support device in the form of a cantilever truss is positioned in the transverse direction on the bottom surface of the mold during operation, separated by left and right when passing through the piers or rotated to pass through one of the rotating shafts so as not to interfere with the piers. The lower work bench is basically provided, and the supporting device is integrated with the outer work bench depending on the beam type of the bridge. There is also a configuration that is provided with a separate inner workbench or in addition to the lower workbench.

The bridge undercarriage work cart formed with the above components is dependent on the configuration of the respective components, and the production and work characteristics of the overall work cart depend on it.

The bridge undercarriage of the lower surface driving type places most of the components on the lower surface of the bridge, so that the structural characteristics of supporting the overall load on the lower side of both sides of the mold and the laid outer and lower worktables are fixed. With the operation of arranging stationary at the position or moving in the span or the other span, when moving to the other span, after passing through the piers by rotating the lower workbench 90 degrees aligned with the bottom surface of the mold Since the lower platform has an operating characteristic that essentially involves an operating state in which the lower platform is aligned with the lower surface of the mold in a transverse direction, the traveling device of the lower surface traveling platform is suitable for the structural characteristics and the operating characteristic. It is an important device required.

The object of the present invention is to provide a high-quality traveling device capable of smoothly running while supporting the whole work cart steadily at the bottom of both wing portions of the mold in constructing a bridge bottom work cart of the bottom surface driving type. .

1 is a front configuration diagram of a work platform of the lower surface driving bridge lower surface of the example applied to the PC bridge.

2 is a rotational state when moving the work cart of the first FIG. Configuration to the next span.

3 is a side view of a traveling device according to an embodiment of the present invention.

Figure 4 is a side configuration diagram of the upper and lower position alignment device of one embodiment of the traveling device configuration of the present invention.

5 is a block diagram of a driving means of the travel device configuration of one embodiment of the present invention.

6 is an excerpt of the driving wheel of the configuration of FIG.

7 is a sliding state of the drive wheel according to one embodiment of the rail expansion joint configuration of the present invention.

8 is a sliding state of the auxiliary wheel according to an embodiment of the rail expansion joint configuration of the present invention.

9 is an example of a rail expansion joint configuration of a traveling device configuration of an embodiment of the present invention.

10 is a bottom view of the configuration of FIG.

Figure 11 is an embodiment of the present invention the configuration and operation of the rail expansion joint configuration and the auxiliary wheel.

12 is a cross-sectional view of an expanded state rail expansion joint configuration of FIG. 9 configuration.

13 is a longitudinal sectional view of an expanded state rail expansion joint configuration of FIG.

14 is another embodiment of the fixing structure of the rail of the travel device configuration of one embodiment of the present invention.

15 is a cross-sectional view of the fixing structure of the rail of the travel device configuration of an embodiment of the present invention.

16 is another embodiment of the fixing structure of the rail of the travel device configuration of one embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

S1, S2: Main girder of PC (prestressed concrete) bridge

Sa, Sb, Sc, Sd: Both wing parts of molds S1 and S2

Se: Outer side member of mold Sf: Inner side member of left and right mold

Sg: Lower surface member of left and right mold Sa1: Sb1: Outer wing of another mold

S1a: next mold connected in sequence Ga: stretching gap between mold and mold

Gb: Expansion gap between rail and rail Pr1, Pr2: Pier

10: left and right traveling device 20: left and right outside workbench

30: left and right rotation support device 40: left and right rotation drive device

50,51: left and right lower workbench 60: tip coupling device

70: left and right inner working platform 71: left and right inner working platform

111: rail holder 111a: holder of another embodiment

112: fixing bolt fixing bolt 114: rail fixing bolt

12: rail 121: lower wing of the rail

12,12a: Rail 123: Support plate

124: fixture 125: auxiliary driving board

126: guide hole of the auxiliary driving board 14: driving wheel

15: idle wheel 141,151: cylindrical auxiliary wheel

16: wheel bracket 17: drive motor

22: upper frame 23, 24: front and rear vertical frame

25: horizontal working plate 26: vertical frame

26a: horizontal frame 27: lower position alignment device

271: flow bracket of the lower alignment wheel 272: lower alignment wheel

273: hydraulic cylinder of the lower flow bracket 28: upper position alignment device

281: flow bracket of the upper alignment wheel 282: upper alignment wheel

283: Hydraulic cylinder of the upper alignment bracket

The configuration of the present invention for achieving the above object, the rail is fixedly installed with the height adjustment means in the longitudinal direction of the mold at the lower end of both side wings of the mold, and the drive means for driving independently with the rail as a sliding surface And a lower position alignment means for storing the driving means upwardly and being aligned on a parallel surface from below the wing portion of the mold, and being freely installed at an inner lower end of the outer platform, and being pressed by hydraulic means to the side members of the mold. And an upper position alignment means which is installed freely up and down on an outer upper end of the outer working platform and is pressed by the hydraulic means to the lower end surface of the wing of the mold.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a front configuration diagram of a work platform of the lower surface of the bridge driving type of the lower surface driving type which is applied to an example PC (prestressed concrete) bridge, and FIG. 2 is a rotational state of the lower work platform when the work cart is moved to the next span. Front view.

In the exemplary embodiment, reference numerals S1 and S2 denote cross-sectional views of a main girder constituting an example PC (prestressed concrete) bridge, and Sa, Sb, Sc, and Sd denote two molds S1 ( Each side wing portion of S2) is displayed respectively, Se denotes the outer surface member of the left and right molds S1 and S2, Sf denotes the inner surface member of the left and right molds S1 and S2, and Sg represents the left and right sides. The bottom surface members of the molds S1 and S2 are respectively indicated, Prl and Pr2 denote the piers supporting the mold, and Ap denotes the road pavement.

The construction of the bridge lower surface work bogie of the lower surface driving type of the example installed on the PC bridge of the above example configuration is formed as a device of left and right symmetry around the boundary (coupling portion) of the left and right molds S1 and S2. The tip of the lower workbench is separated and coupled to the boundary.

In an important configuration, the left and right traveling device 10 which moves along the bridge while supporting the entire work cart on the outer blades Sa and Sd of the two molds S1 and S2, and the traveling device 10 To the left and right outer working platform 20 to support the entire work cart in suspension by hanging at the top, and the left and right working platform vertically freely rotated to the left and right outer working platform 20 is rotated 90 degrees to one side by the left and right rotary drive device 40 The left and right rotation support device 30, and the left and right rotation support device 30 is a truss member of the rectangular cross-section with the outer portion pivoted up and down in a vertical flow, and each end side is provided with a front end coupling device 60, When the two molds (S1) (S2) are located across the entire lower surface of the combination of the front end of the left and right truss members to assemble integrally, when passing through the piers (Prl) (Pr2), the front end of the left and right truss members combined By removing the respective truss members The left and right lower working platform 50 configured to rotate the truss members so as not to interfere with the piers Prl Pr2 by rotating the left and right rotation supporting apparatuses 30 supporting 90 degrees with the respective rotary drive units 40. (51), and the left and right inner working platform 70 is installed so that the installation height is adjusted by the elevating device 71 at the upper end of the left and right lower work benches (50, 51).

Reference numeral 48 is a hydraulic unit, 49 is a height-adjusted hydraulic cylinder installed between the lower outer end of the left and right rotary support device 30 and the outer upper end of the left and right lower work platform 50, 51, 90 is on the road side of the bridge Ladder structure is installed on the left and right outer working table 20 side, 91 is the counterweight of the lower left and right working tables 50, 51, 93 is a tension bar, respectively.

An example traveling device that is implemented in the bridge lower surface work bogie of an example of the lower surface running type is configured as the left and right traveling device 10 and the left and right outside work platform 20.

The left and right traveling apparatuses 10 are fixedly installed along the longitudinal direction of the molds at the lower ends of the outer wings Sa and Sd of the left and right molds S1 and S2, which are constructed in two rows as shown in FIGS. 3 and 4, respectively. Rail 12 of I-shaped cross section, drive wheel 14 and idle wheel 15 which are mounted on the same rotation axis and slide on both upper surfaces of the lower blade 121 of this rail 12, and said drive wheel 14 ) And the front and rear wheel brackets 16 respectively bearing the front and rear sides of the idle wheels 15 at predetermined intervals, and a reduction gear type fixed to one side of the wheel brackets 16 to drive the driving wheels 14. It is the structure provided with the drive motor 17. FIG.

As shown in FIGS. 3, 5, and 15, the fixed structure of the I-shaped cross section rail 12 is located at a predetermined position inside the outer wing portion Sa (Sd) of the mold S1 (S2). After passing through the fixing hole at regular intervals, and fastening the fixing stand 111 having a certain height on the bottom surface by fixing the bolt 112 with the fixing bolt 112, the rail 12 of the I-shaped cross section at the lower end of the fixing stand 111 ) Is fixed to the fixing bolt 114 again. Incidentally, the outer upper end of the rail 12 is provided with a hanger 97 provided with a power supply trolley 96 for supplying power to the drive motor 17 and the overall electric power mechanism.

The driving wheel 14 and the idle wheel 15 which are mounted on both sides of the lower blade 121 of the rail 12 on the same rotation axis and slide in the upper and rear sides of the upper frame 22 of the left and right outer working platform 20 to be described later. Each of the semi-conical steel wheels arranged in the inner side of the front and rear wheel brackets 16, the driving wheel 14 is driven on the outer side of each of the front and rear wheel brackets 16 driven by a reduction gear train-integrated drive motor 17. This structure is constructed so that the idle wheel 15 is constructed in the inner side.

The left and right outer working platform 20 supporting the whole work cart in suspension on the traveling device 10 having the above configuration has the driving wheel 14 and the idle wheel 15 as shown in FIGS. 3 and 4. The upper frame 22 fixedly installed at the upper end, the front and rear vertical frames 23 and 24 supporting the upper frame 22, and the front and rear vertical frames 23 and 24 supported by the mold S1. The horizontal working plate 25 which is arranged in parallel with the lower surface of the outer wing part Sa (Sd) of S2 at regular intervals is formed as a frame, and the molds are respectively formed before and after the inner end of the horizontal working plate 25. (S1) (S2) provided with a lower position alignment device (27) for press-contacting the lower end of the outer surface member (Se); A vertical frame 26 and a horizontal frame 26a are placed on the outer upper end of the horizontal working plate 25 and press-fitted to the lower ends of the outer wings Sa and Sd of the molds S1 and S2, respectively. The upper position alignment device 28 is configured to.

The lower position alignment device 27 of the above-described configuration, as shown in FIG. 1, FIG. 3, and FIG. 4, the flow bracket 271 is installed freely in front and rear of the inner end of the horizontal working plate 25, respectively. The lower alignment wheel 272 is idled so as to be rotated in the longitudinal direction of the molds S1 and S2 on the outer side of the lower end of the weaning copper bracket 271, and the lower and horizontal working plates 25 of the floating bracket 271. A hydraulic cylinder 273 is installed between the inner lower ends of the c), and the lower end of the flow bracket 271 is rotated by the hydraulic cylinder 273 to the lower side of the outer surface member Se of the molds S1 and S2 to be pressed. It is a device which is installed in the configuration and is arranged to horizontally align the lower workbench, which will be described later, or prevent the inclination of the outer workbench 20 toward the outer surface member Se of the mold at the time of moving the span.

The upper position alignment device 28 is a hydraulic cylinder, respectively, as shown in FIGS. 1, 3, and 4, on the upper outer side of the front and rear vertical frames 26 installed on the outer upper surface of the horizontal working plate 25. A flow bracket 281 having a height adjusted to 283 is provided, and the flow bracket 281 is idled with the upper alignment wheel 282 to be rotated in the longitudinal direction of the molds S1 and S2, respectively. The hydraulic cylinder 283 is operated at the time of fixing the lower work table or the stroke movement of the lower work platform, so that the front and rear upper alignment wheels 282 are respectively separated by the outer blades Sa and Sd of the molds S1 and S2. It is a device for arranging the outer working table 20 to be horizontal by preventing the inclined in the outward direction of the mold by pressing on the bottom surface.

Referring to the effects of the configuration of an embodiment of the present invention as described above with the effects of the conventional bridge undercarriage configuration.

The usage state of the bridge underfloor work cart of the example of the lower surface driving type installed on the PC bridge of the example configuration is the work cart alignment operation for the underbody work of the bridge within one span, and the work cart within the work span. It is divided into the moving operation and the work cart moving operation state to the next span.

As shown in FIG. 1, the work cart alignment operation for the underside work of the bridge in one span, and the work cart movement operation state in the one span, the above-described embodiment of the traveling device 10 of the present invention. And the rotary support device 30 which is supported by the rotary drive device 40 and supported by the left and right external work benches 20 and the external work bench 20, and the left and right lower work platforms suspended on the rotary support device 30. 50 and 51 and left and right inner working platform 70 are controlled.

By rotating the left and right rotation support device 30 by controlling the left and right rotary driving device 40 while the driving wheels 14 of the left and right traveling device 10 are stopped, the front end portions of the left and right lower work benches 50 and 51 are rotated. After rotationally moving the lower surface of the mold (S1) (S2) in contact with each other, and then combining the two front end parts integrally with the front end coupling device 60, the whole of the lower surface of the mold (S1) (S2) Work balance alignment operation can be performed.

At this time, in order to adjust the working height of the inner blade (Sb) (Sc) by operating the lifting device 71 can be solved by elevating the left and right inner working platform 70 to an appropriate height.

When moving within one span in the work cart alignment operation state for bridge underside work as described above, the molds S1 and S2 of the lower position alignment device 27 and the upper position alignment device 28 on the left and right sides are moved. When the pressure contact state is released and the drive motor 17 of the left and right travel device 10 is driven and controlled in the moving direction, the drive wheel 14 travels on the rail 12 to mold the entire work cart (S1) (S2). Can be moved within the span, and in the state moved to a predetermined work point, the drive motor 17 is controlled again to stop and the drive wheel 14 is stopped. ) And the upper position alignment device 28 are press-contacted to the outer wing portion Sa (Sd) and the outer surface member Se of the molds S1 and S2, respectively, so that the lower surface work can be performed in the stationary state. It is.

After completing the work in one span by the above-mentioned alignment and shifting operation state, the span shifting operation state which moves the whole work cart to the next span through the bridge Prl (Pr2) first, The lower position alignment devices 27 and 28 are respectively welded to the outer blades Sa and the outer surface members Se of the molds S1 and S2 to align the left and right outer working platforms 20 stably. Let's do it.

Subsequently, when the left and right inner working platform 70 is raised, the elevating device 71 is operated to lower the upper working surface of the lower working tables 50 and 51 so as not to interfere with the left and right lower surface members Sg. The front end portions of the left and right lower working tables 50 and 51 coupled at the boundary of the molds S1 and S2 are released by separating the tip coupling device 60, respectively.

Subsequently, the left and right lower work benches 50 and 51 are controlled to operate the left and right rotation driving device 40 of the left and right rotation support device 30 installed in the respective left and right outer work benches 20, as shown in FIG. Rotate 90 degrees in the outward direction so as not to interfere with the piers Prl (Pr2) to pass.

When the rotation of the left and right lower work benches 50 and 51 is completed, the left and right lower position alignment devices 27 and the upper position alignment devices 25 each have the outer blades Sa and Sd of the molds S1 and S2. And the driving motors 17 of the left and right traveling apparatuses 10 are simultaneously or sequentially controlled separately while being pressed against the outer surface member Se to control driving in the span movement direction.

When the driving motors 17 of the left and right sides are driven, the driving wheels 14 drive on the rails 12, and the lower alignment wheels respectively arranged in the lower positioning device 27 and the upper positioning device 28. 272 and the upper alignment wheel 282 slides on the lower surface of the outer wing portion Sa (Sd) of the mold (S1) (S2) and the outer surface of the outer surface member (Se) in the press-contacted state, and separated into left and right sides. It is possible to move the span along each mold (S1) (S2) while supporting the two working cart half members without shaking.

When the left and right lower work benches 50 and 51 separated to both sides as described above are moved enough within the new span by moving the spans respectively, the left and right lower work benches 50 are controlled by controlling the left and right rotary driving devices 40 respectively ( 51 are rotated to the center side, and then the front end portions are integrally coupled using the front end coupling device 60, the left and right lower work benches 50 and 51 are installed across the bottom surface of the molds S1 and S2. Will be formed as a workbench bottom of the stationary state.

The fixing means of the rail 12 implemented in the left and right traveling apparatus 10 in one embodiment of the present invention implemented as described above, as shown in Figure 16, the outer wing of the mold (S1) (S2) Even when the thickness of Sa (Sd) is changed within a predetermined width, it can be accommodated, so that the installation height of the rail 12 can be kept constant with respect to the road surface constructed on the upper surface of the molds S1 and S2. Has the characteristics.

For example, when the thickness of the outer wing portion Sal of the next mold connected to the outer wing portion Sa of the one-side row mold is thick by a certain width, the tip of the outer wing portion Sal of the next mold to be connected is tapered (Ts). In this case, the height of the fixing member 111, which is an intermediate member for fixing the rail 12 in the thin outer wing portion Sa, is reduced by the thickness difference, so that the overall fixing member 111a is used. The installation height of the rail 12 installed in the entire span can be kept constant on the basis of the road surface constructed on the upper surface of the mold, and accordingly, it can be smoothly driven without any bias toward any one side when the work cart is moved. will be.

In addition, the left and right traveling device 10 in the configuration of one embodiment of the present invention carried out as described above is provided with a rail expansion joint device and a traveling means by merging with a expansion joint structure that is a thermal expansion corresponding configuration between the mold connection portion constructed between the span and the span. As a result, smooth driving operation can be obtained.

5 to 14 are diagrams illustrating one embodiment configuration and operating state of the rail expansion joint device and the traveling means according to the present invention corresponding to the expansion joint structure of the connection part of the mold.

In this construction, in order to absorb thermal expansion when connecting the next mold (S1a) to the one side mold (S1) in the longitudinal direction in a normal bridge construction, there is a contraction between the two connection molds (S1) (S1a) to a certain distance (Ga) Corresponding to the joint structure, both rails 12 are provided with equally spaced gaps Gb at the time of construction of the rails 12 fixed to the lower ends of the outer blades Sa and Sd of the molds S1 and S2. While installing (12a), the support plate 123 having a width of about the width of the rail is narrower on the lower end surface of one end of the rail 12 between the rails 12 and 12a provided with the gap Gb. It is fixed by the fastener 124 having a width, and one end is fixed to the lower end of the rail and the other side is extended to the lower end of the front rail 12 at the end of the opposite rail 12a, and the width thereof is larger than the width of the rail. The auxiliary traveling plate 125 is attached to the left and right by a predetermined width, and the tip extending member of the auxiliary traveling plate 125 has the high height. A rectangular guide hole 126 is formed in the sphere 124 to be in close contact with the outer end in the width direction, so that the outer member surfaces of the guide hole 126 are fixed to the support plate 123 fixed to the lower end of the fixture 124. It is carried out in the structure supported and supported.

Reference numeral 129 is a reinforcing piece attached to both lower ends of the auxiliary running plate (125).

Along with such a rail expansion joint configuration, the driving wheel 14 and the idle wheel 15 which drive this rail 12 are also provided with the expansion joint traveling structures shown in FIGS. 7 and 8.

The driving structure is a semi-conical shape in which the driving wheel 14 and the idle wheel 15 slide on both sides of the lower blade 121 of the I-shaped cross-section rail 12 having wings left and right on both sides of the upper and lower ends. A cylindrical auxiliary wheel having a diameter that is larger than the diameter of the outer end at the semi-conical outer ends of the driving wheel 14 and the idle wheel 15, and which is mounted on the upper end of the auxiliary traveling plate 125 and can travel. 141 and 151 are integrally formed, and both side members of the wheel bracket 16 bearing the driving wheel 14 and the idle wheels 15 are fixed to the driving bolt 18 by the bracket wheel 18. And the idle wheels 15 fixedly assembled so as not to leave the rail 12.

According to the rail expansion joint structure and the expansion joint traveling structure of this structure, as shown in FIG. 9, FIG. 10, etc., when both rails 12 and 12a expand and are close to each other without clearance Gb, Supporting plate in a state in which the front end member of the auxiliary running plate 125 fixed to the bottom surface of one side rail 12a receives the fastener 124 fixed at the bottom surface of the other side rail 12 on the right side of the guide hole 126. Since the support wheel 123 is supported, the driving wheel 14 and the idle wheels 15 as shown in FIG. 6 normally ride on the upper surfaces of the lower blades 121 of both rails 12 and 12a. 12 and 12, when both rails 12 and 12a are contracted and opened with a gap Gb of a predetermined interval, the auxiliary traveling plate 125 fixed to the lower end surface of one rail 12a is gap. Receiving the fixture 124 fixed to the lower end surface of the other rail 12 via the (Gb) portion on the left side of the guide hole 126 Located in the state supported by the support plate 123 in the state, as shown in Figs. 7 and 8, the driving wheel 14 and the idle wheels 15 have a gap Gb where both rails 12 and 12a are opened. As it passes, the auxiliary driving plate that floats in the air and instead supports the cylindrical auxiliary wheels 141 and 151 formed at the outer ends of the driving wheels 14 and the idle wheels 15 is extended outward from the width of the rail. By sliding the upper upper end of the 125, it is possible to move and move the work cart smoothly and stably without fluctuation of the slide height as a whole.

In the implementation of the present invention as described above, the configuration of the above-described embodiment is presented as a preferred embodiment of the present invention, but is not necessarily limited thereto.

For example, the shape of the driving wheel 14 and the idle wheel 15 can be replaced with a shape that can smoothly slide according to the cross-sectional shape of the rail 12, it is installed on a set of wheel bracket 16 Drive wheels 14 and idle wheels 15 are to be installed two sets.

As described above, according to the traveling device of the present invention for a bridge underside work cart for various works carried out on the lower surface of the bridge at the time of construction or after completion of the various bridges, the whole work cart is firmly supported on the lower ends of both sides of the mold. It has the effect of running smoothly yet.

Claims (8)

It is installed in the lower part of the bridge where wing parts are formed on the side such as PC (prestressed concrete) bridge or forced box beam, girder bridge, etc., and the traveling device that moves along the bridge while supporting the entire work cart and the lower work platform Rotating support device to support the rotation, and is supported by the rotary support device in the form of a cantilever truss is positioned in the transverse direction on the bottom surface of the mold during work, when passing through the piers are separated to the left or right, either side to the piers by the rotating shaft In the construction of a bridge lower surface work platform of the lower surface running type having a lower work platform that rotates without interference, the traveling device has height adjusting means along the longitudinal direction of the mold at both wing portions of the mold. A rail fixedly installed, a drive means for traveling independently with the rail as a sliding surface, and the drive means upward An outer working platform which is contracted and arranged in a parallel plane under the wing of the mold; a lower position alignment means which is freely installed at an inner lower end of the outer working platform and is pressed by hydraulic means to a side member of the mold; and an outer upper end of the outer working platform. A traveling device of a bridge lower surface work cart of the bottom surface driving type, characterized in that it is installed freely up and down and configured by upper position alignment means that is pressed by the hydraulic means to the lower surface of the wing of the mold. According to claim 1, the traveling device is composed of a left and right traveling device 10 and the left and right outside operation 20, the left and right traveling device 10 is the outer wing portion of the left and right molds (S1) (S2) constructed in two rows ( Sa) (Sd) is driven on the same rotary shaft and mounted on the rail 12 of the cross section of the I-shaped cross-section respectively fixed along the longitudinal direction of the mold and the upper surface of both sides of the lower blade 121 of the rail (12) A wheel 14 and an idle wheel 15, a wheel bracket 16 for storing the driving wheel 14 and the idle wheels 15, and a reduction gear train-integrated driving motor for driving the driving wheel 14; 17) A traveling device of the work surface of the bridge lower surface of the bridge running type, characterized in that it is configured to. The fixed structure of claim 2, wherein the fixing structure of the rail 12 is formed by penetrating a fixed hole at a predetermined interval in a predetermined position inside the outer blade portion Sa (Sd) of the mold (S1) (S2), the predetermined height on the lower surface After fastening by fixing with a fixing bolt 111 with a fixing bolt 112, characterized in that the rail 12 of the I-shaped section on the lower end of the fixing member 111 is fixed by several fixing bolts 114 The driving device of the bridge undercarriage of the bridge of the lower surface driving type. The fixing structure of claim 2, wherein the fixing structure of the rail 12 has a fixing bolt in a mold having an outer blade portion Sal (Sbl) thicker than the thickness of the outer blade portion Sa (Sd) of the mold S1, S2. Fixing the rails to be fastened by the furnace 112 by using the brackets 111a reduced by a thickness difference thicker than the brackets 111 for fixing the rails 12 at the thin outer blade portion Sa (Sd). The driving device of the bridge lower surface work cart of the lower surface driving type, characterized in that to form a constant height of the rail (12) to be installed on the whole span based on the road surface to be constructed on the upper surface of the mold. The fixed structure of the rail 12 is a structure of the rail expansion joint which merges with the expansion joint structure which is a thermal expansion-response structure between the mold connection parts constructed between a span, and a longitudinal direction to one mold S1. In order to absorb the thermal expansion when connecting the next mold (S1a) to have a gap (Gb) corresponding to the expansion and contraction structure of placing a gap (Ga) of a predetermined interval between the two connection mold (S1) (S1a) and the mold (S1) ( Both rails 12 and 12a are provided on the lower end surface of the outer wing portion Sa (Sd) of S2, and the rail width is about the end portion lower end surface of one of the rails 12 and 12a. The support plate 123 having a width of 118 is fixed to the fixture 124 having a narrower width, one side of which is fixed to the lower end of the rail and the other side of the front rail 12 to the end of the opposite rail 12a. While extending to the bottom surface, the width is attached to the auxiliary traveling plate 125 wider by a certain width to the left and right than the width of the rail In addition, the front end extending member of the auxiliary running plate 125 forms a rectangular guide hole 126 that is guided in close contact with the outer end in the width direction in the fixture 124, and the outer member surfaces of the guide hole 126 The driving device of the bridge lower surface work cart of the bottom surface driving type, characterized in that formed in the configuration supported by the support plate 123 is fixed to the lower end of the fixture (124). According to claim 2, the driving wheel 14 and the idle wheel 15, the semi-conical inner wheel which is mounted on the same rotation axis on both sides of the lower blade 121 of the rail 12 and slides, and the outside of the inner wheels The inner wheels are positioned on the outer sides of the lower blades 121 on both sides of the rail 12 in a state in which the inner wheels are mounted on both upper surfaces of the lower blades 121 of the rails 12, and have sizes corresponding to the lower surfaces of the rails. A traveling device of a bridge lower surface work cart of the bottom surface driving type, characterized in that formed integrally with a cylindrical auxiliary wheel (141) (151) having. According to claim 1, the traveling device is composed of a left and right traveling device 10 and the left and right outer working platform 20, the left and right outer working platform 20 is the upper frame 22 for fixing the left and right traveling device 10 to the upper end ), The front and rear vertical frames 23 and 24 supporting the upper frame 22, and the outer wings Sa of the molds S1 and S2 supported by the front and rear vertical frames 23 and 24. (Sd) The horizontal working plate 25 which is arranged in parallel with the lower end surface at regular intervals is framed, and the outer surface members of the molds S1 and S2 are respectively disposed in front and rear of the inner end of the horizontal working plate 25. (Se) is provided with a lower position alignment device (27) to be in contact with the lower end, the vertical frame 26 and the horizontal frame (26a) is placed on the outer upper end of the horizontal working plate 25, respectively, the mold (S1) The lower surface running bridge bottom surface characterized in that it is provided with an upper position alignment device (28) which is pressed against the lower surface of the outer wing (Sa) (Sd) of (S2). The traveling device of the vehicle. The upper and lower position alignment devices (27) and (28) of the left and right outer working benches (20) according to claim 7, respectively, are provided with flow brackets (271) freely flowing in front and rear of the inner end of the horizontal working plate (25). On the outer side of the lower end of the flow bracket 271, the lower alignment wheel 272 is idlely rotatably rotated in the longitudinal direction of the molds S1 and S2, and the lower end and the horizontal working plate 25 of the flow bracket 271. Between the inner lower end of the hydraulic cylinder (273) is installed, the lower end of the flow bracket (271) by the hydraulic cylinder (273) can be pressed by rotating to the lower side of the outer surface member (Se) of the mold (S1) (S2). Flow bracket 281, the height of which is adjusted by the hydraulic cylinder 283, respectively, on the upper outside of the front and rear vertical frames 26 installed on the outer upper surface of the horizontal working plate 25 and the lower position alignment device 27 of the configuration And the upper bracket 282 to each of the flow brackets 281 to be rotated in the longitudinal direction of the molds S1 and S2, respectively. In this arrangement, the hydraulic brackets 283 operate the floating brackets 281 to the lower edges of the outer blades Sa and Sd of the molds S1 and S2 so that the front and rear upper alignment wheels 282 are respectively Bridge lower surface work of the lower surface driving type, comprising an upper position alignment device 28 that can be pressed against the lower surface of the outer wing portion Sa, Sd of the mold S1, S2. Cart drive.