JP4630211B2 - Crossroad structure and drawbridge - Google Patents

Description

  The present invention relates to a crossing structure of a working path formed in a lower part of a viaduct and a general road intersecting with the working path, and a draw bridge installed in the working path.

In order to alleviate traffic congestion due to railroad crossings, it has been planned in various places to elevate railways and make crossings at level crossings, and a technology for making level crossings has been developed (for example, see Patent Document 1).
JP 2003-55912 A

By the way, in order to reduce the occupation occupation zone, a material conveyance passage is formed under the elevated under construction.
However, scaffolds are often built under the viaduct under construction, and it is not possible to have a sufficient height under the scaffolds. For this reason, there exists a problem that the height required for the material conveyance vehicles, such as a concrete pump car, to pass cannot be obtained.

  On the other hand, for example, as shown in FIG. 8, when a scaffold is provided under the bridge girder 12 of the viaduct 10, an underpass bridge pier is provided so that a height sufficient for the material transport vehicle to pass can be taken under the scaffold. It is also conceivable to form the passage 5 for material conveyance by digging the ballast between 11 and 11 into a groove shape. However, since the general road surface intersecting with the track is formed at the height of the track, a step is formed between the road surface and the groove-shaped passage, thereby preventing the passage of people and general vehicles.

  An object of the present invention is to enable passage of a general road that intersects a material transport passage while digging under an overpass to form a material transport passage.

  In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that a groove-like passage is arranged in the longitudinal direction of the viaduct at the intersection of the viaduct under construction and the road passing thereunder. The crossing road structure is characterized in that it is extended and a drawbridge is installed at the intersection of the grooved passage with the road.

  According to the second aspect of the present invention, a groove-shaped passage extends under the viaduct in the length direction of the viaduct at the intersection between the viaduct under construction along the railway line and a road that passes under and intersects the railway line. In addition, the cross road structure is characterized in that a drawbridge is installed at the intersection of the grooved passage with the road.

  According to a third aspect of the present invention, there is provided a bottom frame disposed at the bottom of the groove-shaped passage, a wall frame connected by the bottom frame and provided along both side walls of the groove-shaped passage, and an upper end of each wall frame. A swinging girder provided so as to be swingable, and a swinging mechanism for swinging each swinging digit with respect to each wall frame, wherein the swinging mechanism has a state in which the ends of the swinging girdles coincide with each other. The swing bridge is characterized in that the swinging girder is swung between the state where the tip of each rocking girder is separated to the width of the groove-shaped passage.

  According to the present invention, by extending the groove-like passage under the viaduct in the longitudinal direction of the viaduct, even when the scaffold is assembled under the viaduct under construction, the scaffold is removed from the groove-like passage under the viaduct. The height can be made high enough for the material transport vehicle to pass. In addition, by installing a drawbridge at the intersection of the grooved passage with the road, when a person or a general vehicle passes through the road, the ordinary vehicle can pass on the drawbridge by lowering the drawbridge. When the material transport vehicle passes through, the draw bridge can be raised so as not to obstruct the traffic of the material transport vehicle.

  Embodiments of the present invention will be described below. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

[1] Intersection Structure FIG. 1 is an elevational view showing an intersection between a railway viaduct 10 and a general road 3 to which the present invention is applied. In addition, the general road 3 is provided in the left-right direction of FIG. 1, the three lines 2 are laid in a direction perpendicular to the paper surface of FIG. 1, and the railway viaduct 10 under construction is provided in parallel with the lines 2. Yes.
On both sides where the track 2 divides the general road 3, a breaker 4 is provided.

  The railway viaduct 10 is provided with a pair of bridge piers 11 spaced apart in the width direction (left-right direction in FIG. 1) and spaced in the length direction (direction perpendicular to the plane of FIG. 1). A bridge girder 12 is installed between the spans. In FIG. 1, the scaffold 13 assembled under the bridge of the viaduct 10 under construction is omitted.

Between each pair of piers 11, the ground surface 1 is dug down to form a groove-like road 5 in the length direction of the viaduct 10. In addition, a retaining wall (not shown) is provided on the left and right sides of the grooved road 5. A pavement 6 for flattening the grooved road 5 is laid at the bottom of the grooved road 5. The grooved road 5 is used as a work road through which large construction vehicles such as a material transport vehicle for constructing the railway viaduct 10 pass.
The grooved road 5 is provided with a draw bridge 20 at the intersection with the general road 3. Hereinafter, the drawbridge 20 will be described in detail.

[2] Configuration of Drawbridge 20 FIG. 2 is an elevation view of the drawbridge 20 in a closed state as viewed from the length direction of the grooved road 5, FIG. 3 is a plan view of the drawbridge 20 in a closed state, and FIG. 2 is a side view of a state where a drawbridge 20 is closed as viewed from the length direction of a general road 3. FIG. FIG. 5 is an elevational view of the state where the drawbridge 20 is opened from the length direction of the grooved road 5.
The drawbridge 20 includes a bottom frame 21, a wall frame 22, a swinging girder 23, a hydraulic cylinder 31, a first link 32, and a second link 33.

  The bottom frame 21 is provided along the bottom of the grooved road 5 and connects the left and right wall frames 22. The bottom frame 21 is disposed at the bottom of the grooved road 5, and a pavement 6 that flattens the grooved road 5 is laid on the top of the bottom frame 21.

The lower end of the wall frame 22 is provided at right angles to both ends of the bottom frame 21. A shaft 41 is provided at the lower end of the wall frame 22. A hydraulic cylinder 31 is swingably attached to the shaft 41.
A shaft 42 is provided at the upper end of the wall frame 22, and the swing beam 23 is swingably attached to the shaft 42. Further, a shaft 43 is provided at an intermediate portion in the height direction of the wall frame 22. A first link 32 is swingably attached to the shaft 43 with respect to the wall frame 22.
The wall frame 22 is disposed along the left and right earth retaining walls.

The end of the rocking wall 23 on the side of the retaining wall is attached to the shaft 42 and can swing with respect to the wall frame 22. Further, a shaft 44 is provided at a position away from the shaft 42 of the swinging girder 23. A second link 33 is swingably attached to the shaft 44. In the state where the drawbridge 20 is closed (FIG. 2), the height of the upper surface of the rocking girder 23 is substantially equal to the height of the road surface of the ordinary road 3, and the ordinary road 3 divided by the grooved road 5 is connected by the drawbridge 20 Is done.
Further, handrails 24 are provided on both sides of the rocking girder 23 to prevent a person or vehicle passing on the drawbridge 20 from falling on the grooved road 5.

  Further, in the vicinity of the drawbridge 20, a hydraulic unit 34 for expanding and contracting the hydraulic cylinder 31, a control panel 35 for controlling the hydraulic unit 34, and an operation panel 36 for operating the control panel 35 are provided.

[3] Configuration of Link Mechanism Here, the configuration of the link mechanism including the hydraulic cylinder 31, the first link 32, and the second link 33 will be described. 6 is an elevational view of the link mechanism as viewed from the length direction of the grooved road 5, FIG. 6A is a state in which the hydraulic cylinder 31 is contracted, and FIG. 6B is a state in which the hydraulic cylinder 31 is expanded. It is. FIG. 7 is a side view of the link mechanism in a state where the hydraulic cylinder 31 is contracted, as viewed from the length direction of the general road 3.

As shown in FIGS. 6 and 7, one end of the hydraulic cylinder 31 is swingably attached to the shaft 41 and the other end is swingably attached to the shaft 45.
One end of the second link 33 is swingably attached to the shaft 44, and the other end is swingably attached to the shaft 46.

  The first link 32 includes two triangular plate members having the same shape, and a shaft 43, a shaft 45, and a shaft 46 are disposed at three corners of the plate member, respectively. The first link 32 can be swung with respect to the wall frame 22 by a shaft 43, can be swung with respect to the hydraulic cylinder 31 by a shaft 45, and can be swung with respect to the second link 33 by a shaft 46. Is done.

[4] Operation of Link Mechanism When the hydraulic cylinder 31 is contracted, as shown in FIG. 6A, the shaft 43 and the shaft 44 are substantially the same height, and the drawbridge 20 is closed.
When the hydraulic cylinder 31 is extended, the shaft 45 rotates with respect to the shaft 43, and the first link 32 swings with respect to the shaft 43, whereby the shaft 46 rotates with respect to the shaft 43. Since the distance between the shaft 46 and the shaft 43 is larger than the distance between the shaft 45 and the shaft 43, the displacement amount of the shaft 46 is amplified by the first link 32 with respect to the displacement amount of the shaft 45 caused by the hydraulic cylinder 31. Is done.

  Then, the shaft 44 connected to the shaft 46 by the second link 33 is interlocked and rotated with respect to the shaft 42, so that the swing beam 23 swings as shown in FIG. Thus, the swinging girder 23 is in a substantially vertical state, that is, the drawbridge 20 is opened.

  When the hydraulic cylinder 31 is contracted, the shaft 45, the shaft 46, and the shaft 44 rotate in the reverse direction, so that the swing beam 23 swings in the reverse direction. As shown in FIG. A continuous state, that is, the drawbridge 20 is closed.

[5] Operation of Drawbridge 20 Next, the operation of the drawbridge 20 will be described.
When the large construction vehicle does not pass through the grooved road 5, the drawbridge 20 is closed as shown in FIG. 2, and ordinary vehicles and people lower than the large construction vehicle are allowed to pass.

  When a large vehicle passes through the part of the drawbridge 20 of the grooved road 5, the operator controls the control panel 35 by the operation panel 36 and controls the hydraulic unit 34 by the control panel 35 to extend the hydraulic cylinder 31. When the hydraulic cylinder 31 is extended, the swing beam 23 is rotated by the operation of the link mechanism, and the draw bridge 20 is opened. In this state, the swinging girder 23 does not interfere with the large vehicle that passes through the groove-like passage 5. Further, since the swinging girder 23 that is substantially vertical blocks the general road 3, it is possible to prevent a general vehicle or a person from falling into the groove-shaped passage.

  After the large vehicle passes through the drawbridge 20, the operator controls the control panel 35 with the operation panel 36 and controls the hydraulic unit 34 with the control panel 35 to contract the hydraulic cylinder 31. When the hydraulic cylinder 31 is contracted, the swing beam 23 is rotated by the operation of the link mechanism, and the draw bridge 20 is closed.

  As described above, according to the present embodiment, the work road provided under the underpass of the viaduct 10 under construction is the grooved road 5 that is dug down from the general road 3, so that a large construction vehicle can pass. A sufficient height can be secured. In addition, by installing a drawbridge 20 at the intersection of the grooved road 5 with the general road 3, when the construction vehicle does not pass through the grooved road 5, the drawbridge 20 is closed so that the general road 3 is closed. It is possible to open the drawbridge 20 and allow the construction vehicle to pass only when the construction vehicle passes through the grooved road 5 without preventing the ordinary vehicle from passing.

In addition, although the above embodiment demonstrated in the railway viaduct 10, although this invention is not restricted to this, you may implement in the viaduct 10 such as a road.
Further, in this embodiment, the case where the scaffold is provided under the girder has been described. However, the present invention is not limited to this, and the original girder height is low, and the height enough for the construction vehicle to pass through is low. It can also be applied when it cannot be obtained.

It is an elevation view which shows the intersection of the railway viaduct 10 and the general road 3 to which this invention is applied. FIG. 2 is an elevational view of the state where the drawbridge 20 of FIG. 1 is closed as viewed from the length direction of the grooved road 5. It is a top view in the state where drawbridge 20 was closed. 2 is a side view of a state where a drawbridge 20 is closed as viewed from the length direction of a general road 3. FIG. FIG. 3 is an elevational view of the state where the drawbridge 20 is opened from the length direction of the grooved road 5. FIG. 3 is an elevational view of the link mechanism of the drawbridge 20 as viewed from the length direction of the grooved road 5, where (a) shows a state in which the hydraulic cylinder 31 is contracted and (b) shows a state in which the hydraulic cylinder 31 is extended. 3 is a side view of the link mechanism in a state in which a hydraulic cylinder 31 is contracted, as viewed from the length direction of a general road 3. FIG. It is an elevation view which shows the state which dug down the underpass in the shape of a groove | channel and formed the grooved road 5. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground surface 2 Track 3 General road 4 Breaker 5 Groove-shaped passage 6 Pavement 10 Viaduct 11 Bridge pier 12 Bridge girder 13 Scaffold 20 Draw bridge 21 Bottom frame 22 Wall frame 23 Oscillating girder 24 Handrail 31 Hydraulic cylinder 32 First link 33 Second link 34 Hydraulic unit 35 Control panel 36 Operation panel 41, 42, 43, 44, 45, 46 axis

Claims (3)

At the intersection of the viaduct under construction and the road passing under it,
A groove-shaped passage extends under the viaduct in the length direction of the viaduct,
A crossroad structure characterized in that a drawbridge is installed at the intersection of the grooved passage with the road. At the intersection of the viaduct under construction along the track and the road that passes under it and intersects the track,
While extending the channel in the length direction of the viaduct under the viaduct,
A crossroad structure characterized in that a drawbridge is installed at the intersection of the grooved passage with the road. A bottom frame located at the bottom of the channel,
A wall frame connected by a bottom frame and provided along both side walls of the channel,
A swinging girder that is swingably provided at the upper end of each wall frame;
A swing mechanism that swings each swing beam with respect to each wall frame,
The swing mechanism swings the swing girders between a state in which the tips of the swing girders coincide with each other and a state in which the tips of the swing girders are separated to the width of the groove-shaped passage. Drawbridge.

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