JP7561024B2 - Covering plate structure for platform door construction, covering plate for braille blocks, manufacturing method for covering plate for braille blocks, and construction method for platform door - Google Patents

Description

The present invention relates to a covering plate structure for platform door construction used during construction to install platform doors or the like on railway platforms, a covering plate for braille blocks, a manufacturing method for a covering plate for braille blocks, and a construction method for platform doors.

The installation of platform doors on railway platforms is becoming more common. When installing platform doors on railway platforms, a structure that can withstand the weight of the platform door opening and closing control device, as well as a structure to accommodate the power supply and signal cables to the opening and closing control device, are required. Therefore, construction work to install these structures is required on existing platforms.

Installation of platform doors takes place late at night when train services are not available. On the other hand, during hours when train services are available, covering plates are laid over the areas of the platform where construction is taking place. By laying the covering plates, passengers can walk on the platform and use the train in near-normal conditions, even during construction.

The time during which work can be done to install platform doors is only around two to three hours, between the last train at midnight and the first train in the morning. Furthermore, if the covering plate is removed when work begins and then installed when work is completed, the time available for the actual work to be carried out is further shortened. For this reason, it is desirable to minimize the labor required for installing and removing the covering plate.

JP 2011-6844 A JP 2012-7321 A Patent No. 4604132 Patent No. 4880797 JP 2020-153147 A

To efficiently install and remove the covering plate, multiple long and narrow covering plates, each about 500 mm wide and 2000 to 2500 mm long, are lined up across the width of the platform to form a unit of covering plates that are laid continuously along the length of the platform or track. To reduce weight, this covering plate has a structure in which multiple square steel pipes are lined up at intervals and covered with a floor plate on the surface side. A structure in which multiple square steel pipes are lined up forms a space inside the covering plate, making it possible to reduce weight.

Meanwhile, the Barrier-Free Act requires that platform edge warning blocks known as braille blocks (hereafter referred to as warning blocks) be installed at a specified distance from the end of the platform, even when they are temporary. For this reason, a strip-shaped warning block sheet with multiple consecutive warning blocks is attached with line tape or the like to the surface of, for example, three covering plates lined up across the width of the platform. The use of line tape for attachment makes it easier to remove and restore the warning blocks.

The Barrier-Free Development Guidelines (hereafter referred to as the Guidelines) stipulate that warning blocks should be installed at least 800mm, and at most 1000mm, from the end of the platform, so for example, 800mm from the end of the platform is adopted. For narrow platforms, for example, it is preferable to set the minimum distance of 800mm within the 800-1000mm range. Since the warning block must be at least 400mm across the platform width, if the covering plate is 500mm wide, the warning block will be attached across the second and third covering plates from the end of the platform. To improve work efficiency, a warning block sheet is used, so the warning block sheet is attached across two covering plates.

However, in strong winds, the wind blowing through the gaps in the covering plate can remove the line tape, and there is a risk that the warning block sheet will fly away. Furthermore, during restoration work to lay the warning block sheet after rainfall, the covering plate is dried using a gas burner or similar device, and the warning block sheet is attached to the covering plate with line tape. This means restoration work takes time, which can result in shorter construction times.

Furthermore, the covering plates to be removed before construction begins are the first covering plate, as well as the second and third covering plates with warning block sheets affixed across them, meaning that all three covering plates must be removed before construction begins and then restored when construction is suspended, resulting in poor work efficiency. Also, it is not possible to adopt flexible construction procedures such as removing the second and third covering plates separately and carrying out construction in each location, which can result in a prolonged construction period.

The object of the present invention is to provide a covering plate structure for platform door construction, a covering plate for braille blocks, a manufacturing method for a covering plate for braille blocks, and a construction method for platform doors that improve the efficiency of the installation work of covering plates during platform door construction.

According to a first aspect of the present invention, a track-side covering plate unit is provided that is rectangular in shape having a first width and a first length that is longer than the first width, and that is arranged on the platform tip side with the direction of the first length aligned along the track;
A rectangular Braille block covering plate is disposed adjacent to the opposite side of the platform tip of the covering plate unit and has a second width and a second length longer than the second width,
The covering plate unit has one covering plate or a plurality of covering plates arranged in parallel along the track, and the first width is a distance from the end of the platform of the braille block prescribed by law,
The covering plate and the covering plate for the braille block have an internal space forming structure that forms a space inside and a floor plate that covers the surface of the internal space forming structure,
The floor plate of the braille block covering plate has a plurality of braille block floor plates arranged continuously in the second length direction,
Each braille block floor plate has a covering plate structure for platform door construction in which braille protrusions are formed on the surface along the long side of the braille block covering plate that contacts the covering plate unit.

According to a second aspect of the present invention, a step of repeatedly performing N times a press process using a dome-shaped dot protrusion die for forming M dome-shaped dot protrusions on a floor plate covering a surface of a braille block covering plate to form the M dome-shaped dot protrusions on the surface;
a step of flattening the tops of the dome-shaped dot-like protrusions by pressing the floor plate on which the dome-shaped dot-like protrusions are formed using a half-dome dot-like protrusion die for flattening the tops of the dome-shaped dot-like protrusions;
This method of manufacturing a covering plate for a braille block includes the steps of heating a floorboard having M×N half-dome-shaped dot-like protrusions formed thereon to a high temperature, electrostatically coating the surface of the floorboard by baking paint containing anti-slip particles thereon, and further coating the surface with yellow paint to counter color-blindness.

The present invention can improve the work efficiency of covering plates during platform door construction. It can also form tactile paving blocks as required by law on the covering plates.

This is a cross-sectional view showing an example of the platform structure before construction of platform doors begins. FIG. 1 is a cross-sectional view showing an example of a platform structure when conventional platform door construction is suspended. This is a side view showing the configuration of the covering plates and covering girders when platform door construction is suspended. This is a diagram showing an example of the platform structure after completion of platform door construction. FIG. 2 is a plan view showing an example of a covering plate structure for platform door construction in this embodiment. This is a plan view showing the unconnected state of the three covering plates that make up the covering plate structure for platform door construction. 1 is a plan view and a side view showing an example of the structure of a covering plate of this embodiment. A diagram showing an example of the platform structure when platform door construction is suspended using the covering plate structure of this embodiment. 1A to 1C are diagrams showing an example of a manufacturing process for the warning block floor panel of the present embodiment. This is a plan view showing a covering plate structure that is temporarily installed when conventional platform door construction is suspended. This is a cross-sectional view of the platform where the first platform door is installed. This is a plan view and a cross-sectional view of a platform where the first platform door is installed. This is a plan view and a cross-sectional view of the platform at step 3. This is a plan view and a cross-sectional view of the platform at step 4. This is a cross-sectional view of a platform where the second type of platform doors are installed.

Braille blocks include dotted blocks with multiple dot-like projections arranged in a matrix, dotted blocks with an inner line (platform edge warning blocks), and linear blocks with multiple linear projections (guidance blocks). These braille blocks are laid at a specified distance from the end or edge of the platform. In the following explanation, platform edge warning blocks (hereinafter referred to as warning blocks) are used as an example of these braille blocks, but in this invention, warning blocks may be replaced with dotted blocks or linear blocks. Accordingly, in the following explanation, the braille block covering plate and braille block floor plate in the claims will be explained using warning block covering plates and warning block floor plates, respectively.

[The platform before construction of platform doors began]
FIG. 1 is a cross-sectional view showing an example of the structure of a platform before the start of the construction of platform doors. The example shown in FIG. 1 is the cross-sectional structure of an embankment-type railway platform. In an embankment-type platform, an embankment 11 piled up on the ground 10 is protected by a retaining wall 13 consisting of a plurality of blocks provided on the track side 19. An RC (Reinforced Concrete) plate 14 is provided on the track side of the retaining wall 13 and the embankment 11, and asphalt coating 15 and mortar 16 are provided on steel pipe piles (not shown) provided on the opposite side of the platform from the track side, the RC plate 14, and the embankment 11. A tip tile 18 is provided on the track side above the mortar 16, and a warning block 17 is provided on the platform side.

In order to install platform doors on an embankment platform, the door opening and closing control device, which is the platform door, must be installed on the platform, and the power and control signal cables connecting to the door opening and closing control device must be placed under the platform. Therefore, the embankment platform must be modified to be able to withstand the weight of the door opening and closing control device and to allow for the placement of the cables.

[Platform when platform door construction is suspended]
FIG. 2 is a cross-sectional view showing an example of a platform structure when the conventional platform door construction is suspended. The suspension of the platform door construction is when the platform door construction is suspended from the first train to the last train. When the platform door construction starts, the asphalt coating 15 and the embankment 11 below it at the position of the steel pipe pile 21 (see FIG. 4) to be installed are excavated from the state before the start of the platform door construction shown in FIG. 1, and the steel pipe pile 21 is installed. At the same time, the warning block 17, the end tile 18, the mortar 16, and the RC plate 14 are removed from the end of the platform. Furthermore, the embankment 11 below the RC plate 14 is excavated, and a lining girder 20C is installed on the embankment 11 and the retaining wall 13 as a temporary girder to support the lining plate. A plurality of lining girders 20C are installed at predetermined intervals in the longitudinal direction of the platform (perpendicular to the paper). The steel pipe piles 21 are located between a number of lining girders 20C provided at predetermined intervals along the length of the platform, and are shown by dashed lines as they are not visible in the cross-sectional view of Figure 2 .

As shown in Figure 2, rectangular covering plates P1, P2, and P3, which are long in the longitudinal direction of the platform, are placed in parallel at the end of the platform on the track side along the track and perpendicular to the longitudinal direction of the platform, via height-adjustable girders 12 on top of covering girders 20C, which are installed at a predetermined interval along the longitudinal direction of the platform.

Figure 3 is a side view showing the structure of the covering plates and covering girders when the platform door construction is suspended. Figure 3 is a side view of the platform as seen from the track side. As mentioned above, three covering plates P1, P2, P3 are placed in parallel in the direction perpendicular to the page on top of the retaining wall 13 and multiple covering girders 20C installed on top of the retaining wall 13. Then, each of the covering plates P1, P2, P3 is fixed to the covering girders 20C by a clamper (not shown). The covering girders 20C are installed on top of the retaining wall 13, for example, with the H-shaped steel oriented horizontally. The steel pipe piles 21 mentioned above are not visible in the side view of Figure 3, so they are omitted.

As shown in Figures 1, 2 and 3, the warning block 17, end tile 18, mortar 16 and RC plate 14 at the end of the platform will be removed, and a new lining girder 20C will be installed, with lining plates P1, P2 and P3 laid between the lining girders 20C. By adopting this structure, during construction of the platform doors, the lining plates P1, P2 and P3 will be removed after the last train and the platform structure will be remodeled, and then lining plates P1, P2 and P3 will be laid on the lining girder 20C before the first train, restoring the structure, which increases the workability of removing and restoring the lining plates.

[Platform after completion of platform door construction]
FIG. 4 is a diagram showing an example of the structure of a platform after the platform door construction is completed. When the platform door construction is completed, the lining girders 20C are installed as cross beams 20 on the steel pipe piles 21 and the retaining wall 13 at predetermined intervals along the length of the platform. The cross beams 20 are installed, for example, by tilting H-beams horizontally. A cable passage hole 25 is also provided in the cross beam 20. Then, a precast prestressed concrete plate (PPC plate) 22 is installed so as to span a pair of cross beams 20 installed at predetermined intervals along the length of the platform. The PPC plate is a substrate on which the platform door is installed.

A warning block 23 and a leading edge tile 24 are provided on the PPC board 22 and the platform's asphalt coating 15 (see Figures 1 and 2), and a door opening/closing control device 31 is installed on the leading edge tile 24. A pair of doors 32 of the platform doors that open and close move out from within the pair of door opening/closing control devices 31 to a closed state, and also move into the pair of door opening/closing control devices 31 to an open state. The door opening/closing control device 31 constitutes the platform doors, and has the function of a housing that houses the doors, and the function of a control device that controls the opening and closing of the doors. The door opening/closing control device 31, which is the platform door, is fixed to the PPC board 22, which is the platform door installation base, with anchor bolts.

The structure of the steel pipe piles 21, cross beams 20, and PPC panels 22 newly installed in the platform door construction allows the heavy door opening/closing control device 31 to be installed at the end of the platform. In addition, the provision of a cable passage hole 25 in the cross beam 20 allows the cable 26 connected to the door opening/closing control device 31 to be accommodated, minimizing the amount of embankment to be excavated.

[Conventional covering plate structure]
Fig. 10 is a plan view showing the structure of a covering plate that is temporarily installed when conventional platform door construction is suspended. When construction is carried out on a platform, even with the covering plate temporarily installed, it is necessary to lay a warning block 45 having a dot-like protrusion 42 and one linear protrusion 43 on the covering plate at a position 800 to 1000 mm from the end of the platform in accordance with the Barrier-Free Law. When conventional platform door construction is suspended, as shown in Fig. 2, a warning block sheet 27 consisting of multiple warning blocks 45 connected in the platform length direction is attached and fixed to the covering plate with line tape at a position from a position of length D4 = 800 mm from the end of the platform to the inside of the platform (the track side, the opposite side to the end of the platform).

As shown in Figure 10, the widths D1, D2, and D3 of the three covering plates P1, P2, and P3 are all approximately 500 mm, the length D5 of the warning block in the direction perpendicular to the platform length is approximately 400 mm, and the position of the warning block 45 is a distance D4 (800 mm) from the end of the platform. Therefore, the warning block sheet 27 is affixed across the covering plates P2 and P3.

By attaching both sides of the warning block sheet 27 to the covering plate with line tape, the warning block sheet can be easily removed when work begins late at night and restored when work ends early in the morning in a short time.

However, there is a risk that the warning block sheets 27 will fly onto the platform during strong winds. Furthermore, when it rains and construction is suspended and the warning block sheets are restored, the surface of the covering plate must be dried using a gas burner or similar device while the warning block sheets are attached using line tape, which lengthens the restoration work time and shortens the actual work time for platform door construction. Furthermore, because the warning block sheets are attached across P2 and P3 out of the covering plates P1, P2, and P3, the covering plates P2 and P3 must be removed together with the warning block sheets during construction, which reduces the efficiency of platform door construction.

Therefore, in an embodiment of the present invention, instead of attaching a warning tile sheet to the covering plate with line tape, the structure of the covering plate is improved to solve the above-mentioned conventional problems.

[Covering plate structure for platform door construction in this embodiment]
Fig. 5 is a plan view showing an example of a covering plate structure for platform door construction in this embodiment. Fig. 6 is a plan view showing the three covering plates constituting the covering plate structure for platform door construction in an unconnected state. The horizontal direction in Fig. 5 is the length direction of the track and platform, and the vertical direction is the width direction of the platform. When the three covering plates P11, P12, and P13 in Fig. 5 are connected in parallel, the covering plate structure 100 is separated into the three covering plates P11, P12, and P13 shown in Fig. 6 when the connections are removed.

In the example of FIG. 5, the covering plate structure 100 has three covering plates P11, P12, and P13. Covering plate P11 is arranged at the front end of the platform, and covering plates P12 and P13 are arranged adjacent to covering plate P11 on the opposite side of the front end of the platform. The track is arranged on the opposite side of covering plate P11 to covering plate P12. As an example, covering plates P11, P12, and P13 have a horizontal length L10 of approximately 2500 mm or 2000 mm, and vertical widths D11, D12, and D13 of D11 = 500 mm, D12 = 300 mm, and D13 = 500 mm, respectively.

The covering plate structure 100 in FIG. 5 has a covering plate unit (P11+P12) on the track side that is arranged at the end of the platform with its length aligned along the track and has covering plates P11 and P12, and a warning block covering plate P13 that is arranged on the opposite side of the covering plate unit (P11+P12) from the end of the platform.

The covering plate unit (P11+P12), which has two covering plates P11 and P12 arranged adjacent to each other with their length direction parallel to the track at the end of the platform, forms a rectangle with a first width D11+D12 and a first length L10 that is longer than the first width. As mentioned above, the first width D11+D12 is 800 mm, which is the sum of D11 = 500 mm and D12 = 300 mm, and is a length within the range of 800 to 1000 mm from the end of the platform to the warning block as stipulated in the Barrier-Free Law.

Furthermore, the warning block covering plate P13 is disposed adjacent to the covering plate unit (P11+P12) on the side opposite the platform tip, and has a second width D13 and a second length L10 that is longer than the second width. In the example of FIG. 5, the second length L10 is the same as the first length L10, but they do not necessarily have to be the same. For example, the second length and the first length may have a relatively small integer ratio, such as 1:2 or 2:1.

The lining plates constituting the lining plate units (P11, P12) and the lining plate constituting the warning block lining plate P13 each have an internal space forming structure that forms a space inside, and multiple floor plates that cover the surface of the internal space forming structure. The structure of this lining plate is described in detail in Figure 7.

As shown in Figures 5 and 6, the multiple floor plates 40 provided on the surface of the warning block covering plate P13 are arranged continuously in the length direction of the warning block covering plate P13. Each floor plate 40 has the same width as the width D13 of the warning block covering plate P13, and the width of the floor plate 40 in the length direction of the covering plate is, for example, 300 to 420 mm. In addition, end connecting members 53 that cover the ends of the internal space forming structure described later are provided on both the left and right ends of the covering plate units P11, P12 and the warning block covering plate P13. The multiple floor plates and end connecting members 53 of the covering plates P11, P12 are not shown in Figures 5 and 6.

Each floor plate 40 of the warning block covering plate P13 is a warning block floor plate 41 with multiple dot-like protrusions 42 and linear protrusions 43 formed on its surface. In the example of Figures 5 and 6, the warning block 45 formed on the surface of the warning block floor plate 41 has a dot-like block 44 in which dot-like protrusions 42 are formed in a 5 x 5 matrix, and one linear protrusion (inner display line) 43 arranged on the opposite side of the platform tip of the dot-like block 44.

The warning block 45 formed on the warning block floor panel 41 is arranged along the long side E2 of the warning block lining plate P13, which is in contact with the long side E1 (long side E1 of lining plate P12) of the lining plate unit (P11 + P12) opposite the platform end. By lining the warning block 45 along the long side E2 in this way, the warning block 45 is arranged at a position D11 + D12 = 800 mm from the platform end in the lining plate structure 100. As a result, if the lining plate unit (P11 + P12) and the warning block lining plate P13 are arranged in parallel from the platform end, the warning block formed in the length direction of the lining plate structure 100 will automatically be arranged at the position (800 to 1000 mm) specified by law from the platform end.

Five dot-like projections 42 and one linear projection 43 are also formed by press working on the end connecting members 53 that cover both ends of the warning block covering plate P13. By forming part of the warning block 45 on the end connecting members 53 as well, a continuous belt-like warning block is formed on the multiple warning block covering plates P13 that are connected in the longitudinal direction of the platform.

The warning block floor plate 41 is a thin plate, such as an aluminum plate, and multiple dot-like protrusions 42 and linear protrusions 43 are formed on the thin plate by die pressing.

In addition, on the covering plate P11 that constitutes the covering plate unit (P11+P12) located at the end of the platform, a CP line (Color Psychology line) CP is painted along the long side E0 on the platform end side. The CP line has the function of informing people with color-blindness of the position of the end of the platform.

As mentioned above, the total width of the two covering plates P11, P12 that make up the covering plate unit (P11+P12) at the end of the platform is 500 + 300 = 800 mm, so when the warning block covering plate P13, which has multiple warning block floor plates 41 on its surface, is placed next to the covering plate P12 on the platform, the warning blocks 45 formed on the surfaces of the multiple warning block floor plates 41 will be positioned 800 mm from the end of the platform.

As a result, the covering plates P11, P12 that make up the covering plate unit (P11+P12) and the warning block covering plate P13 can be simply placed and fixed on the temporary covering girder 20C, and the covering plate can be restored to the state it was in when construction was suspended. When restoring the covering plates, the conventional work of attaching warning block sheets to the covering plates with line tape is no longer necessary. In addition, since the multiple dot-like protrusions and one linear protrusion that make up the warning blocks 45 are formed directly on the multiple warning block floor plates 41 of the warning block covering plate P13, the warning block sheet will not peel off from the covering plate in strong winds as in the past.

Furthermore, as will be described in detail later, construction can be carried out by removing covering plates P11 and P12 without removing warning block covering plate P13, and when restoring covering plates P11 and P12, they can be restored using warning block covering plate P13, which remains in the correct position, as the reference position. This allows covering plates P11 and P12 to be restored without conducting a construction gauge survey of the platform to ensure the distance between the vehicle and the covering plate at the end of the platform, as was done when restoring all three covering plates, improving work efficiency.

In addition, if the covering plates P11 and P12 are removed and the leading edge tile is laid, the door opening/closing control device can be installed on the leading edge tile while the warning block covering plate P13 remains in place. This can be done in parallel with the work of removing the warning block covering plate P13 and laying the warning blocks, shortening the construction period.

[Structure of covering plate]
Fig. 7 is a diagram showing an example of the configuration of the lining plate in this embodiment. In Fig. 7, (1) is a plan view of the lining plates P11, P12, and P13, (2) is a right side view of the lining plate, (3) is a cross-sectional view of the lining plate taken along line A-A, (4) is a plan view of the end connecting member, (5) is a left side view of the end connecting member, (6) is a front view of the lining plate, and (7) is a cross-sectional view of the lining plate taken along line B-B.

The lining plate shown in Figure 7 shows the structure of lining plates P11, P12, and P13 shown in Figures 5 and 6. In the case of lining plates P11 and P12, a floor plate 40 covers the surface of multiple connected square steel pipes, and in the case of warning block lining plate P13, a warning block floor plate 41 covers the surface of multiple connected square steel pipes. Dot-like protrusions and linear protrusions are formed on the warning block floor plate 41, but these are omitted in Figure 7. Multiple connected square steel pipes correspond to an internal space forming structure that forms a space inside the lining plate.

As shown in the plan view of Figure 7 (1), for example, the lining plate has four square steel pipes SP1, SP2, SP3, and SP4 arranged in parallel at a specified interval, rectangular connecting members 50 that connect the two square steel pipes SP1 and SP2 on the page and the two square steel pipes SP3 and SP4 below on the front side, and a U-shaped connecting member 52 that connects the two central square steel pipes SP2 and SP3 on the back side. A slit hole 52a is formed in the center of the U-shaped connecting member 52 to insert a crank that fixes the lining plate to the lining girder.

The lining plate further has a pair of rectangular cap-shaped end connecting members 53 that cover both ends of the four connected square steel pipes SP1 to SP4. However, the left end connecting member 53 is shown in a position where it is not covered by the square steel pipes. The end connecting member 53 is fixed to the connected square steel pipes with screws (not shown). The end connecting member 53 also has two screw holes 56 for adjusting the height of the lining plate when the lining plate is placed on the lining girder, and a lining plate holding tool hole 57 into which a holding tool is inserted when holding the lining plate. The height adjustment screw hole 56 and the lining plate holding tool hole 57 are also shown in the plan view of the end connecting member 53 in Figure 7 (4).

The covering plate has floor plates 40 or warning block floor plates 41 that cover the surfaces of the four connected square steel pipes SP1 to SP4. The multiple floor plates 40 or warning block floor plates 41 cover the surfaces between the end connection members 53 at both ends of the connected square steel pipes SP1 to SP4. In FIG. 7, the floor plate 40 or warning block floor plate 41 at the left end is shown by a solid line in the plan view (1). The remaining floor plates 40 or warning block floor plates 41 are shown by dashed lines in the B-B cross-sectional view (7). The floor plates 40 or warning block floor plates 41 are fixed to the rectangular connection member 50 with screw holes (not shown) and are fixed to the connected square steel pipes SP1 to SP4.

Misalignment prevention holes 58 are provided in the square steel pipes SP1 and SP4 located on the outside of the lining plate. When placed on the lining girder, differences in the rigidity of adjacent lining plates can cause their deflection to differ, resulting in a shift in the height of the lining plate surface. To prevent this, misalignment prevention pins 59 are inserted into the misalignment prevention holes 58 of adjacent lining plates.

The right side view of Figure 7 (2) shows the side of the end connecting member 53 and the side of the square steel pipes SP1 to SP4. The left side view of the end connecting member 53 in Figure 7 (5) shows three end connecting member covers 54 formed on the left side of the end connecting member with diagonal lines. In the area of the end connecting member 53 where the end connecting member covers 54 are not formed, end connecting member holes 55 are formed into which connecting members (not shown) are inserted to connect the covering plates in the longitudinal direction.

The A-A cross-sectional view of Figure 7 (3) shows the cross sections of the four square steel pipes SP1-SP4, the rectangular connecting member 50, the U-shaped connecting member 52, and the floor plate 40 or the warning block floor plate 41. The floor plate 40 or the warning block floor plate 41 has a surface area that covers the surfaces of the four square steel pipes SP1-SP4 and a side area that partially covers the outer surfaces of the square steel pipes SP1, SP4 on both outer sides, and in the cross-sectional view (3) it has a U-shaped inverted shape.

The front view of Figure 7 (6) shows a rectangular parallelepiped end connecting member 53 that covers the right end of the square steel pipe SP4, and a floor plate 40 or warning block floor plate 41 that covers the front side of the square steel pipe SP4. The connecting member 50 is also shown by a dashed line. Furthermore, a misalignment prevention hole 58 is shown at the center position of the square steel pipe SP4.

The B-B cross-sectional view of the covering plate in Figure 7 (7) shows a cross-section of the square steel pipe SP4, end connecting member 53, and floor plate 40 or warning block floor plate 41, and further shows in dashed lines the connecting member 50 and the floor plate 40 or warning block floor plate 41, which are not shown in plan view (1). End connecting member holes 55 formed in the connecting members 53 at both ends are also shown. Furthermore, a misalignment prevention hole 58 is shown in the center position of the square steel pipe SP4.

[Platform when platform door construction is suspended in this embodiment]
Fig. 8 is a cross-sectional view showing an example of the structure of a platform when the construction of the platform door is suspended, using the covering plate structure of this embodiment. The ground 10, embankment 11, height adjustment girder 12, retaining wall 13, asphalt coating 15, steel pipe pile 21, and covering girder 20C in Fig. 8 are the same as those in the conventional example in Fig. 2.

However, unlike the conventional example in FIG. 2, the covering plate structure placed on the covering girder 20C in FIG. 8 via the height adjustment girder 12 has a covering plate P11 placed at the end of the platform on the track 19 side, a covering plate P12 placed adjacent to the covering plate P11, and a warning block covering plate P13 placed adjacent to the covering plate P12. In the example in FIG. 8, the widths D11 and D13 of the covering plates P11 and P13 are about 500 mm, as in FIG. 2, but the width D12 of the covering plate P12 is about 300 mm, unlike FIG. 2. Therefore, the sum D11 + D12 = D4 of the widths D11 and D12 of the covering plates P11 and P12 placed on the platform end side is 800 mm, which is the range of the length from the end of the platform to the warning block set by law.

Furthermore, in the example of Figure 8, the floor plate of the warning block covering plate P13 is a warning block floor plate in which dot-like protrusions 42 and linear protrusions 43 are formed by die pressing or the like, and a warning block 45 having dot-like protrusions 42 and linear protrusions 43 is arranged on the long side E2 side of the warning block covering plate P13. Since the horizontal length of the warning block 45 is approximately 400 mm, the warning block 45 formed on the warning block floor plate is formed biased toward the long side E2 side of the warning block covering plate P13, which has a width D13 of 500 mm.

[Manufacturing process of warning block floor panel of this embodiment]
Figure 9 shows an example of the manufacturing process of the warning block floor plate of this embodiment. Figure 9 (1) shows, in a clockwise direction, a plan view, a right side view, and a front view of the warning block floor plate 41 before the warning blocks are formed. Figures 9 (2) to (6) show plan views, right side views, and front views in each process of forming the warning blocks.

In the process of FIG. 9 (1), the warning block floor plate 41 is formed by bending a specific width of the upper and lower ends of a rectangular aluminum plate by 90 degrees. The bent shape in the right side view is the same as the warning block floor plate 41 shown in FIG. 7 (3).

In this embodiment, the warning block floor plate 41 made of the above-mentioned aluminum plate is pressed using a mold to form dot-like protrusions and linear protrusions. As described above, for example, 5 x 5 = 25 dot-like protrusions 42 and one linear protrusion 43 are formed on one warning block floor plate 41 by press working. The covering plate is installed on the platform when construction is suspended, and railway users walk on it, so it is necessary for the surface to be flat.

Therefore, in this embodiment, the warning block floor plate 41 is first pressed five times using a dot-like protrusion die (not shown) that presses five dot-like protrusions adjacent to each other in a straight line, and then the warning block floor plate 41 is pressed using a linear protrusion die that presses one linear protrusion. In this way, by sequentially pressing fewer than 25 dot-like protrusion dies (five) in multiple steps, deformation of the warning block floor plate due to pressing can be suppressed and a flat shape can be maintained. Specifically, this is as follows.

In FIG. 9 (2), a dome-shaped dot protrusion die (not shown) for pressing five dome-shaped dot protrusions arranged vertically is used to press the warning block floor plate 41 to form five dome-shaped dot protrusions 42d. In the press process, the dome-shaped dot protrusion dies (male and female sides) are pressed from the right and left sides of the warning block floor plate 41 shown in the right side view. The dome-shaped dot protrusions are semispherical protrusions. As shown in the right side view, the dome-shaped dot protrusions 42d are protrusions that are convex on the front side of the warning block floor plate 41 and concave on the back side.

Figure 9 (3) shows the state after the press process using the five-piece dome-shaped dot-like projection die is repeated four more times, resulting in a total of 25 dome-shaped dot-like projections 42d being formed on the warning block floor panel.

Next, in FIG. 9 (4), a half-dome-shaped dot-like projection die (not shown) that flattens the tops of the dome-shaped dot-like projections is used to press the warning block floor panel 41 to form the half-dome-shaped dot-like projections 42 as specified by law. This press processing may be performed five times using a half-dome-shaped dot-like projection die for five projections, or it may be performed once using a half-dome-shaped dot-like projection die for 25 projections. In this press processing, it is necessary to make the corners between the round flat part in the center of the half-dome-shaped dot-like projection and the sloped part around the flat part rounded to within 2 mm as specified by law. The shape of the dome-shaped dot-like projections makes it easy for pedestrians to slip, so half-dome-shaped dot-like projections are specified.

Furthermore, as shown in the upper right of Figure 9 (4), it is desirable to form a 1 to 2 mm unevenness on the round flat part in the center of the half-dome-shaped dot-like protrusion 42. The half-dome-shaped dot-like protrusions 42 formed on metal floor panels become slippery over time even after powder coating, which will be described later, so forming unevenness can make them less slippery. A yellow paint can then be applied over the powder coating to make them easier to identify for people with poor eyesight. If the unevenness is painted yellow, even if the yellow paint on the tops of the protrusions peels off due to wear from pedestrians, the yellow paint in the recesses will remain, allowing the ability to identify to be maintained for a long time.

In Figure 9 (5), a linear protrusion die for pressing linear protrusions 43 is used to press warning block floor plate 41 to form one linear protrusion 43. Legally, linear protrusion 43 has a greater width in plan view than point-like protrusion 42 and the same height as point-like protrusion 42. Linear protrusion 43 is also a protrusion that is convex on the front side of warning block floor plate 41 and concave on the back side. In the case of linear protrusion 43, as shown in the upper right of Figure 9 (5), it is desirable to form a 1 to 2 mm unevenness in the elongated flat part in the center of linear protrusion 43. The advantage is the same as that of half-dome-shaped point-like protrusion 42.

In FIG. 9 (6), first, the entire surface of the warning block floor plate 41 in plan view is coated with a powdered resin for anti-slip purposes. After that, the area of the warning block 45 on the surface of the warning block floor plate 41, where 25 dot-like protrusions 42 and one linear protrusion 43 are formed, is painted yellow for the visually impaired.

The powder resin coating agent is, for example, saturated polyester resin paint mixed with alumina powder for anti-slip properties. The specific painting process involves electrostatic painting in which the warning block floor plate 41 made of aluminum plate, which is the base material, is heated to, for example, about 340°C, and the alumina powder-mixed resin paint is sprayed onto the floor plate surface. The yellow paint is applied using solvent painting. The painting process is controlled so that the width of the upper plane of the dot-like protrusions and linear protrusions, the overall width, height, and the measurement points of the roundness between the upper plane and the slope based on laws and regulations are met, while adjusting and managing the painting time of the alumina-mixed resin paint.

As explained in Figure 5, in addition to the multiple warning block floor plates 41 on the surface, the warning block covering plate P13 also has dot-like protrusions 42 and linear protrusions 43 formed on the end connecting members 53. The warning block floor plates 41 are, for example, aluminum plates, while the end connecting members 53 are made of iron. The warning block floor plates 41 and the end connecting members 53 are made of different materials, and the plate thicknesses differ accordingly.

Because the materials and plate thicknesses are different, different dome-shaped dotted protrusion dies, half-dome-shaped dotted protrusion dies, and linear protrusion dies are used for pressing the warning block floor plate 41 and for pressing the end connecting member 53, respectively.

In the process of press forming five dot-like protrusions and one linear protrusion on the end connection member 53, as in FIG. 9, first, five dome-shaped dot-like protrusions are formed by press forming using a five-point dome-shaped dot-like protrusion die. Then, the tops of the five dome-shaped dot-like protrusions are pressed flat using a half-dome dot-like protrusion die. Then, one linear protrusion is formed by press forming using a linear protrusion die.

[Modification 1]
In the conventional lining plate structure shown in Figure 10, three lining plates P1, P2, and P3 with a width of 500 mm are arranged in parallel. Using lining plates of the same width and length improves workability and reduces costs.

In contrast, in the covering plate structure of this embodiment shown in Figures 5 and 6, a 500 mm wide covering plate P11, a 300 mm wide covering plate P12, and a 500 mm wide warning block covering plate P13 are arranged in parallel. The 500 mm wide covering plates P11 and P13 have a structure in which four square steel pipes SP1 to SP4 are connected as internal space forming structures, as shown in Figure 7, while the 300 mm wide covering plate P12 has a structure in which, for example, three square steel pipes are connected. Therefore, if the same square steel pipes are used, the rigidity of the narrower lining plate P12 will be lower than the rigidity of the wider lining plates P11 and P13, and when the three lining plates P11, P12, and P13 are placed between the lining girders 20C, the weight of the railway passengers will cause the narrower lining plate P12 to deflect more than the wider lining plates P11 and P13.

To solve this variation in the amount of deflection, in this embodiment, it is desirable to make the plate thickness of the square steel pipe of the narrow lining plate P12 thicker than the plate thickness of the square steel pipe of the wide lining plates P11 and P13. The difference in thickness is desirably selected so that the amount of deflection when placed on the lining girder 20C is approximately the same. It is desirable to make the plate thickness of the square steel pipe of the narrow lining plate thicker than the square steel pipe of the wide lining plate to make the rigidity of both lining plates equal and the amount of deflection equal.

[Modification 2]
In the above embodiment, the track-side covering plate unit P11+P12 is formed by connecting in parallel a covering plate P11 having a width of 500 mm and a covering plate P12 having a width of 300 mm. However, the track-side covering plate unit P11+P12 may be formed by connecting two covering plates having a width of 400 mm in parallel. Alternatively, the track-side covering plate unit P11+P12 may be formed by a single covering plate having a width of 800 mm. In either case, the warning block 45 provided on the warning block covering plate P13 is 800 mm from the leading edge of the platform, which satisfies the legally stipulated position of the warning block from the leading edge of the platform, which is 800 to 1000 mm.

[Modification 3]
In the above embodiment, as shown in Fig. 7, the internal space forming structures of the lining plates P11, P12 and the lining plate P13 for warning blocks are formed by connecting a plurality of square pipes. The internal space forming structure may have the following structure in addition to the structure of connecting a plurality of square pipes.

For example, as shown in Figures 4, 9, and 10 of Japanese Patent No. 4880797, the internal space forming structure may be a corrugated steel plate in which the cross section in the width direction of the covering plate is repeatedly bent alternately between the bottom surface and the top surface of the covering plate. That is, the corrugated steel plate has a bottom surface portion located on the bottom surface of the covering plate, a top surface portion located on the top surface, and a diagonal vertical portion located between the bottom surface and the top surface portion, extending from the bottom surface to the top surface or from the top surface to the bottom surface. Alternatively, the structure may be one in which multiple channel steels are connected.

Alternatively, as described in JP 2020-143147 A and the like, a structure having a box-shaped bottom plate without a lid that forms a space between the bottom and top of the covering plate, multiple vertical ribs arranged to extend in the length direction of the covering plate within the space from the bottom to the top, and multiple horizontal ribs arranged to extend in the width direction of the covering plate within the space from the bottom to the top can also be used as an internal space forming structure.

[Installation of platform doors using lining plates]
Next, we will explain how to use the covering plate structure of this embodiment in platform door installation work, and explain the advantages of the covering plate structure.

Figure 11 is a cross-sectional view of a platform where the first type of platform door is installed. It is a cross-sectional view at the position of the cross beam 20 shown in Figure 4. Also, Figure 12 is a plan view and a cross-sectional view of a platform where the first type of platform door is installed. Figure 12 (1) is a plan view, and (2) and (3) are cross-sectional views at positions B and A in the plan view. Figure 12 (3) is a cross-sectional view at the same position as Figure 11, but the door opening and closing control device has been omitted. The first type of platform door has a wall structure on both sides of the housing for the door opening and closing control device.

The main steps in the construction of platform door installation are as follows. The following steps are carried out, for example, in units of 5000 mm in length of the PPC panel 22. In this case, each construction team is in charge of the construction in units of 5000 mm in length of the PPC panel. In each cross-sectional view, the left side of the retaining wall 13 is the track side 19, and the right side of the retaining wall 13 is filled with embankment 11.

(Step 1) As described in Figure 4, steel pipe piles 21 are driven at a predetermined interval (e.g., 5 m) along the length of the platform, and cross beams 20 (or lining girders) are laid so that they are cantilevered by the steel pipe piles. For example, the steel pipe piles 21 and cross beam 20 are installed at position A in Figure 12 (1). During construction, this cross beam 20 supports the lining plate together with an intermediate support (not shown) laid in the middle of the cross beam 20. Specifically, a height-adjusting girder is laid on the cross beam 20, and the lining plate is placed on the height-adjusting girder. The length of the lining plate is, for example, 2500 mm, half the 5000 mm interval between the steel pipe piles 21.

(Step 2) Then, the cable cabinet 29 that houses the cable is anchored to the retaining wall 13 on the track side 19.

(Step 3) After that, the PPC panels 22 are laid between the cross beams 20. As a result, the cable cabinet 29 is placed between the retaining wall 13 and the PPC panels 22. The PPC panels 22 are the platform for the platform doors, supporting the weight of the platform doors and stress caused by wind.

In steps 2 and 3 above, the covering plates are removed from the work area and each work is carried out, and when work is suspended, the removed covering plates are restored to their original positions.

(Step 4) After the PPC plate 22 is laid on the cross beam 20, the covering plate is removed, and the leading edge tile 24 is laid at the leading edge of the platform, and the warning block 23 is laid at the center of the platform. At the B-B cross section in Figure 12 (2), the leading edge tile 24B of 500 mm in the width direction of the platform and the warning blocks 23A and 23B of 300 mm and 400 mm are laid. At the A-A cross section in Figure 12 (3), the leading edge tile 24A of 800 mm and the warning block 23B of 400 mm are laid. The 300 mm warning block 23A has a dotted block 44, and the 400 mm warning block 23B is a warning block 45 (Figure 6) with a dotted block 44 and a linear protrusion (inner indication line) 43. The leading edge tile and warning block 23 are on the same plane as the platform surface 28.

(Step 5) Once the leading edge tile and warning block have been laid, as shown in Figure 11, the door opening/closing control device 31, which is the platform door, is installed on top of the 800 mm leading edge tile 24A at the A-A cross section. Specifically, the door opening/closing control device 31 is fixed to the PPC plate 22 with anchor bolts or the like. In addition, power and signal cables are laid inside the cable cabinet 29. Once the leading edge tile and warning block have been laid, the covering plate will not be restored.

As shown in Figure 11, the door opening/closing control device 31 is installed on the platform side of the vehicle construction limit position 62. This is because it is prohibited to construct buildings in the space on the track side of the vehicle construction limit position 62 to eliminate any impact on vehicles running along the platform. By observing the vehicle construction limit position, the door opening/closing control device 31 is installed, for example, 390 mm from the end of the platform, so the width of the PPC board 22 that supports its weight, wind stress, etc. is, for example, 700 mm.

Figure 13 shows a plan view and a cross-sectional view of the platform in step 3. As with Figure 12, Figure 13 (1) is a plan view, and (2) and (3) are cross-sectional views at positions B and A in the plan view. In step 1, covering plates P11, P12, and P13 are laid from the track 19 side on the cross beam 20 via a height adjustment beam (not shown). In addition, at position A in the plan view, an additional covering plate P14 is also laid to lay the steel pipe pile 21. As mentioned above, the steel pipe piles 21 and cross beams 20 are laid at intervals of, for example, 5000 mm, while the covering plates P11, P12, and P13 are, for example, 2500 mm long and are laid between the cross beams 20 spaced 5000 mm apart and the intermediate supports at the midpoints between the cross beams.

After the covering plates are laid, in step 2, covering plates P11 and P12 are temporarily removed and cable cabinet 29 is laid on retaining wall 13. Since cable cabinet 29 is approximately 500 mm wide, if covering plates P11 and P12 (total width 800 mm) are temporarily removed, cable cabinet 29 can be laid without removing covering plate P13 and leaving it in place. After cable cabinet 29 is laid, covering plates P12 and P11 are restored adjacent to covering plate P13 that has not been removed. By not removing covering plate P13, covering plates P12 and P11 can be restored based on the position of covering plate P13, eliminating the need to measure the platform construction limit distance and determine the positions of covering plates P12 and P11. The platform construction limit distance is the distance at which the end of the platform can be constructed from the side of the train. In the past, when a warning block sheet was attached across covering plates P2 and P3, peeling off the warning block sheet and removing covering plates P2 and P3 together with P1 meant that when the covering plates were restored, it was necessary to measure the platform construction limit distance and determine the position of the covering plate at the end of the platform. When peeling off the warning block sheet, the positions of covering plates P2 and P3 could shift, and so covering plates P2 and P3 were removed together.

Similarly, in step 3, the covering plates P11 and P12 (total width 800 mm) are temporarily removed, and for example, a 700 mm wide PPC plate 22 is laid on top of the cross beams 20 spaced 5000 mm apart. In this case, too, if the covering plates P11 and P12 (total width 800 mm) are temporarily removed from the 700 mm wide PPC plate 22, the 700 mm wide PPC plate 22 can be laid while leaving the covering plate P13 in place, improving work efficiency as in step 2.

Figure 14 shows the plan view and cross-section view of the platform in step 4. Figure 14 (1) is the plan view, and (2) and (3) are cross-section views of positions B and A in the plan view. In step 4, the covering plates P11 and P12 are removed, and a tip tile 24A is laid in the fixed fence area RG_A at position A in the plan view, and a tip tile 24B and a warning block 23A are laid in the boarding/alighting area RG_B at position B. After that, the covering plates P11 and P12 are not restored.

At this time, the covering plate P13 may not be removed, and the installation of the warning block 23B at the position of the covering plate P13 may be postponed. Then, when the leading edge tile 24A is laid in at least the fixed fence area RG_A at position A, the door opening/closing control device 31 can be installed on the leading edge tile 24A. This increases the flexibility of the construction, such as performing the installation work for the door opening/closing control device in parallel with the work of removing the covering plate P13 and laying the warning block 23B. Alternatively, the installation work for the door opening/closing control device 31 may be performed first, and the installation work for the warning block 23B may be performed later. This flexibility in construction can shorten the construction period.

Figure 15 is a cross-sectional view of a platform where a second type of platform door different from the above is installed. The second type of platform door in Figure 15 (door opening/closing control device 31_2) differs from the first type of platform door in Figure 11 (door opening/closing control device 31) in that the walls of the housing that houses the doors have been made skeletonized, making it lighter. Due to the lighter weight, the structure for fixing the door opening/closing control device 31_2 is different from that in Figure 11.

That is, the door opening/closing control device 31 in Fig. 11 adopts a structure of a cross beam 20 attached to a steel pipe pile 21 and a high-strength PPC plate 20 to support its weight and wind stress on the wall of the housing. In contrast, the door opening/closing control device 31_2 in Fig. 15 adopts a structure of a 1000mm-wide terra cell 61 laid on the embankment 11 and a 1400-1700mm-wide RC plate (reinforced concrete plate) 60. As a result, the door opening/closing control device 31_2 is supported by the weight of the wide RC plate 60. And, for example, a covering plate structure of four plates with widths of 500mm, 300mm, 500mm, 300mm (total 1600mm) or 500mm, 300mm, 500mm, 500mm (total 1800mm) is adopted from the end of the platform. For this reason, when laying Terrace Cell 61, the second to fourth covering plates will be removed from the end of the platform, and when laying RC plate 60, all four covering plates will be removed.

However, in the construction of the cable cabinet 29, as in FIG. 13, only the lining plates P11 and P12 at the end of the platform can be removed, and the remaining lining plates P13 and P14 can be left in place. Similarly, the construction of the end tile 24A in the fixed fence area on the RC plate 60 and the construction of the end tile 24B and the warning block 23A in the boarding/alighting area can be done by removing the lining plates P11 and P12. Then, the construction of installing the door opening/closing control device 31_2 on the end tile 24A and the construction of installing the warning block 23B by removing the lining plate P13 can be done in parallel or in any order. Therefore, even in the construction of installing platform doors using the door opening/closing control device of FIG. 15, the lining plate structure of this embodiment can be used to improve the efficiency of the removal of the lining plates and the restoration work, and to shorten the construction period.

The above-mentioned construction can be carried out by removing the covering plates P11 and P12 without removing P13, even if the covering plates P11 and P12 are both 400 mm thick.

[summary]
(1) In the lining plate structure of this embodiment, the arrangement of the lining plates is changed so that the lining plate P11 at the end of the platform is 500 mm wide, and the second lining plate P12 is 300 mm wide. The lining plate unit (P11 + P12) having these two lining plates is 800 mm wide, and complies with the provisions of the Barrier-Free Law that require the warning block position to be 800 mm or more, and at most 1000 mm, from the end (or edge) of the platform. The third lining plate P13 is a lining plate for warning blocks covered with multiple consecutive warning block floor plates in which multiple dot-like protrusions and one linear protrusion are directly formed by die pressing on the floor plate. As a result, the warning block is laid in the position specified by the Barrier-Free Law simply by installing the third lining plate P13 in parallel with the lining plate unit (P11 + P12). This eliminates the need to lay warning block sheets as in the past, and improves the efficiency of restoration and removal of covering plates when construction is suspended or restarted. In addition, warning block sheets will no longer be blown away by strong winds.

In the covering plate structure of this embodiment, the rectangular covering plate unit (P11+P12) and the warning block covering plate P13 are arranged along the length of the railway line. Then, multiple warning block floor plates that are continuously covered in the length direction of the warning block covering plate P13 are each formed with multiple dot-like protrusions and one linear protrusion (or multiple dot-like protrusions, or multiple linear protrusions) by die pressing. This allows the flatness of each warning block floor plate to be maintained, and the overall flatness of the warning block covering plate P13 covered by multiple warning block floor plates can be obtained.

In contrast, if the warning block covering plate P13 is made of a single steel plate, it would be extremely difficult to maintain the flatness of the long steel plate if the surface shape of the warning block sheet, which has multiple dot-like protrusions and one linear protrusion, were to be formed by die pressing on the surface of a single very long steel plate.

For the above reasons, a structure in which a rectangular covering plate arranged along the length of the track is covered with multiple floor plates that are continuous along the length of the covering plate allows, first, the surface of the entire covering plate to be flattened, and since the surface shape of the warning block sheet is formed on each of the multiple floor plates by die pressing, each floor plate can be flattened, and second, the surface of the entire warning block covering plate covered by the multiple floor plates can also be flattened. Therefore, the covering plate structure of this embodiment is suitable for forming the surface shape of a long warning block sheet that is arranged along the track.

(2) In this embodiment, the covering plates P11, P12 and the warning block covering plate P13 are made by covering an internal space-forming structure made of multiple connected square steel pipes with multiple floor plates 40 or warning block floor plates 41, so that an internal space is formed and the weight is reduced. Therefore, even though the covering plate is a long rectangular plate in the length direction of the platform, it is lightweight, so that the work of restoring and removing the covering plate when construction is suspended and resumed can be made more efficient.

(3) Also, related to the description in (1), the warning block covering plate P13 of this embodiment is constructed by covering an internal space forming structure with multiple warning block floor plates 41. The warning block floor plates 41 are each formed by die pressing each floor plate to form multiple dot-like protrusions and one linear protrusion on the surface. When the dot-like protrusions 42 and linear protrusions 43 are die pressed, the processed plate is prone to warping and bending. However, if a relatively small-sized floor plate is formed by dividing the length of a single warning block covering plate P13, the warping and bending due to die pressing can be suppressed to an acceptable level.

The warning block floorboards also need to be coated with a powder resin coating to prevent slipping, and with a yellow paint for color-blind people. For the coating, the base material, the warning block floorboards, is heated to a high temperature, and then the powder resin paint is sprayed on. Again, because the floorboards are relatively small in size, any distortion or bending of the floorboards that occurs during the heating process can be kept to an acceptable level.

Therefore, the covering plate covered with the small-sized floor plate in this embodiment has a structure suitable for directly processing the multiple dot-like protrusions 42 and one linear protrusion required for the warning block into the floor plate. In other words, in this embodiment, by using a small-sized floor plate that covers the internal space forming structure as the warning block floor plate, it is possible to form the warning block by mold pressing, electrostatic painting, etc.

In addition, by forming fine irregularities on the top surface of the half-dome shaped dot-like protrusions, the warning blocks can be made less slippery when combined with powder coating, even if the floor plate is made of steel. In addition, by painting the fine irregularities yellow, even if there is wear from pedestrians, the yellow paint will only peel off on the convex surfaces of the irregularities, and not on the concave surfaces, so the lifespan of the yellow paint for weak eyesight can be extended.

(4) In this embodiment, the lining plate unit is composed of two lining plates P11 and P12 of different widths, and the number of square steel pipes that form the internal space of the second lining plate P12, which is narrower, is made less than the number of square steel pipes of the first lining plate P11, which is wider. Accordingly, the plate thickness of the square steel pipes of the second lining plate P12 is made thicker than the plate thickness of the square steel pipes of the first lining plate P11. This allows the hardness of the first and second lining plates to be approximately the same, and the amount of deflection when placed side by side on the lining girder 20C can be made approximately the same.

(5) In the process of forming the warning blocks by die pressing the floorboards, the floorboards are pressed using a dome-shaped die to form dome-shaped dot protrusions, and then pressed using a half-dome-shaped die to form half-dome-shaped dot protrusions. Furthermore, 5 x 5 = 25 dot protrusions are processed by repeatedly pressing using a die for fewer than 25 dot protrusions, for example, 5 dot protrusions. This makes it easier to process the warning blocks than pressing using a die for 25 dot protrusions.

In this embodiment, a CP line is painted along the long edge of the first covering plate at the end of the platform, making it easier for people with color-blindness to identify the end of the platform.

(6) The aforementioned Patent Document 1 (JP Patent Publication 2011-6844A) states that "it is also possible to make the panel body itself uneven to serve as a warning display section." However, the platform component panel 1 described in Patent Document 1 is a rectangular covering plate that is long in the width direction of the platform and is arranged in the length direction of the platform, and is not arranged in parallel in the length direction of the platform, as in the covering plate of the covering plate structure of this embodiment, so that the workability of removing and restoring the covering plate is extremely low. In addition, since the platform component panel 1 is a single steel plate, it is difficult to obtain flatness if multiple dot-like protrusions are directly formed by die pressing. In this embodiment, in a covering plate structure in which multiple rectangular covering plates that are long in the length direction of the platform are arranged in parallel in the width direction of the platform, by simply arranging the covering plate unit (P11+P12) and the warning block covering plate P13 at the end of the platform, a warning block can be installed at a position from the end of the platform as specified by law, and problems such as scattering of warning block sheets are solved.

(7) The covering plate structure of this embodiment has a covering plate unit (P11+P12) with a total width of, for example, 800 mm and a warning block covering plate P13. Therefore, during platform door construction, the two covering plates P11 and P12 of the covering plate unit can be removed and the warning block covering plate P13 can be left in place while cable cabinets and PPC plates are laid, improving construction efficiency. In addition, after removing the covering plate unit (P11+P12) and laying the tip tiles, the door opening/closing control device installation work and warning block 23B installation work can be carried out in parallel, or in any order, thereby shortening the construction period.

10: Ground 11: Embankment 13: Retaining wall 13a: Emergency exit 14: RC plate 15: Asphalt coating 16: Mortar 17: Warning block 18: Tip tile 19: Track side 12: Height adjustment girder 20: Cross girder 20C: Covering girder (temporary girder) 21: Steel pipe pile 22: PPC plate 23: Warning block 24: Tip tile 25: Cable hole 26: Cable 27: Warning block sheet 28: Platform surface 29: Cable cabinet 30: Platform door 31: Door opening/closing control device (platform door housing)
31_2: Door opening/closing control device
32: Door P1, P2, P3: Covering plate 100: Covering plate structure P11, P12, P13: Covering plate
P11 and P12: Covering plate unit P13: Covering plate for warning block
P13: Cover plate for warning block D11, D12, D13: Width 40: Floor plate 41: Warning block floor plate 42: Dot-like projection 42d: Dome-shaped dot-like projection 43: Linear projection 44: Dot-like block 45: Warning block
E0, E1, E2: Long sides SP1, SP2, SP3, SP4: Square steel pipes 50, 52: Connecting members 52a: Holes for fixing lining plate 53: End connecting members 54: End connecting member covers 55: End connecting member holes 56: Height adjustment screw holes 57: Holes for tool holding lining plate 58: Misalignment prevention holes 59: Misalignment prevention pins 60: RC plate 61: Terrace cell 62: Vehicle construction gauge position

Claims (8)

A track-side covering plate unit that is rectangular and has a first width and a first length that is longer than the first width, and is disposed on the platform tip side with the direction of the first length aligned along the track;
A rectangular Braille block covering plate is disposed adjacent to the opposite side of the platform tip of the covering plate unit and has a second width and a second length longer than the second width,
The covering plate unit has one covering plate or a plurality of covering plates arranged in parallel along the track, and the first width is a distance from the end of the platform of the braille block prescribed by law,
The covering plate and the covering plate for the braille block have an internal space forming structure that forms a space inside and a floor plate that covers the surface of the internal space forming structure,
The floor plate of the braille block covering plate has a plurality of braille block floor plates arranged continuously in the second length direction,
Each braille block floor plate has a covering plate structure for platform door construction in which braille protrusions are formed on the surface along the long side of the braille block covering plate that contacts the covering plate unit. The covering plate structure for platform door construction described in claim 1, in which each of the plurality of braille block floor plates is a metal plate having a predetermined thickness, and the braille protrusions are formed by die pressing into the metal plate. The covering plate structure for platform door construction described in claim 2, in which the braille protrusions of the metal plate have unevenness formed on the surface of the protrusion top, and the surface of the area in which the braille protrusions are formed is given a first coating of paint containing anti-slip particles and a yellow coating on the first coating. The internal space forming structure has the length of the long side of each of the covering plate and the covering plate for the braille block, and has a plurality of square tubes arranged at predetermined intervals in the width direction of each of the covering plate and the covering plate for the braille block, and a connecting member that connects the plurality of square tubes,
The covering plate structure for platform door construction according to claim 1, wherein the surfaces of the plurality of rectangular tubes are covered with the floor plate. The covering plate unit has the plurality of covering plates,
The plurality of lining plates include a first lining plate having M of the plurality of rectangular tubes, and a second lining plate having N of the plurality of rectangular tubes, the N being less than M, and having a width narrower than that of the first lining plate;
The covering plate structure for platform door construction according to claim 4, wherein the plate thickness of the plurality of square tubes of the second covering plate is thicker than the plate thickness of the plurality of square tubes of the first covering plate. A covering plate for a tactile paving block is disposed adjacent to a track-side covering plate unit on the opposite side to the platform end, the covering plate having a first width and a first length longer than the first width, the direction of the first length being arranged along the track on the platform end side, and the covering plate for a tactile paving block is disposed adjacent to the track-side covering plate unit on the opposite side to the platform end, the covering plate having a second width and a second length longer than the second width,
The covering plate unit has one covering plate or a plurality of covering plates arranged in parallel along the track, and the first width is a distance from the end of the platform of the braille block prescribed by law,
The braille block covering plate has an internal space forming structure that forms a space inside, and a floor plate that covers the surface of the internal space forming structure,
The floor plate of the braille block covering plate has a plurality of braille block floor plates arranged continuously in the second length direction,
Each braille block floor plate is a covering plate for platform door construction, in which braille protrusions are formed on the surface along the long side of the covering plate for braille blocks that contacts the covering plate unit. A manufacturing method for the platform door construction covering plate structure according to claim 1,
A process of repeatedly performing N times a press process using a dome-shaped dot protrusion die for forming M dome-shaped dot protrusions on a floor plate covering a surface of the braille block covering plate to form the M dome -shaped dot protrusions on the surface;
a step of flattening the tops of the dome-shaped dot-like protrusions by pressing the floor plate on which the dome-shaped dot-like protrusions are formed using a half-dome dot-like protrusion die for flattening the tops of the dome-shaped dot-like protrusions;
This method for manufacturing a covering plate structure for platform door construction includes the steps of: heating a floor panel having M x N half- dome-shaped dot -like protrusions formed thereon to a high temperature; electrostatically coating the surface of the floor panel by baking paint containing anti-slip particles; and further coating the surface with yellow paint to combat color blindness. A first step of covering the surface of the front end of the platform with the platform door construction covering plate structure according to claim 1;
A second step of temporarily removing the covering plate unit while covering the braille block covering plate, laying a cable cabinet or a platform door installation board inside the platform under the area covered by the covering plate unit, and covering the covering plate unit in its original position;
A third step of removing the covering plate unit while covering the braille block covering plate, and laying a tip tile on the platform surface in the area covered by the covering plate unit;
A fourth step of installing the platform door on the tip tile;
and a fifth step of removing the braille block covering plate and laying warning tiles on the platform surface in the area where the braille block covering plate was covered.
A construction method for platform doors, wherein the fourth and fifth steps are carried out at any time after the third step.

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