Ceiling panel removal device

Abstract

To provide a ceiling panel removal device capable of stably supporting a ceiling panel.SOLUTION: A ceiling panel removal device 1 used for removing ceiling panels from a tunnel includes a vehicle 10 capable of traveling inside a tunnel, a lower stage support platform 20 mounted on the vehicle 10 via a lower stage lifting unit 21, and an upper stage support platform 30 mounted on the lower stage support platform 20 via an upper stage lifting unit 33 and supporting the ceiling panel from below. The upper stage lifting unit 33 lifts and lowers the upper stage support platform 30 to a greater extent than the lower stage lifting unit 21. The lower stage lifting unit 21 adjusts the inclination of the upper stage support platform 30.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a ceiling panel removal device used for removing ceiling panels of a tunnel. [Background technology]

[0002] Tunnel ceiling panels may be removed due to deterioration or changes to the ventilation system, and techniques for efficiently removing ceiling panels have been proposed in the past. For example, a removal device is known that includes a support platform that supports the ceiling panels from below, a lifting device that raises and lowers the support platform, and a traveling body such as a trailer that carries these devices (Patent Document 1). With this removal device, the support platform is raised to lift and remove the ceiling panel, and the traveling body is moved with the ceiling panel raised to carry it out of the tunnel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 7-197510 Summary of the Invention [Problem to be solved by the invention]

[0004] However, due to the influence of factors such as the gradient of the road surface inside the tunnel and the shape error of the ceiling panel, the support base may tilt, causing the support base and the ceiling panel to become non-parallel, making it difficult for the support base to stably support the ceiling panel. In the above-mentioned technology, since the lifting device has only one stage, it is not easy to adjust (correct) the tilt of the support base, making it difficult for the support base to stably support the ceiling panel.

[0005] SUMMARY OF THE PRESENT DISCLOSURE In consideration of the above circumstances, the present invention provides a ceiling panel removal device capable of stably supporting a ceiling panel. [Means for solving the problem]

[0006] The present invention is a ceiling panel removal device used for removing ceiling panels from a tunnel, comprising a vehicle capable of traveling within the tunnel, a lower stage support platform mounted on the vehicle via a lower stage lifting unit, and an upper stage support platform mounted on the lower stage support platform via an upper stage lifting unit and supporting the ceiling panel from below, wherein one of the lower stage lifting unit or the upper stage lifting unit raises and lowers the upper stage support platform to a greater extent than the other of the lower stage lifting unit or the upper stage lifting unit, and the other of the lower stage lifting unit or the upper stage lifting unit adjusts the inclination of the upper stage support platform.

[0007] In this case, the upper support platform may include a first support platform mounted on the lower support platform and supported via the upper lifting section, a second support platform mounted on the first support platform and supporting the ceiling panel from below, and a lateral movement section mounted between the first support platform and the second support platform and moving the second support platform in the width direction of the tunnel.

[0008] In this case, it is preferable that the scaffolding further includes a suspended scaffold that is suspended from the rear of the second support stand and is arranged to be capable of ascending and descending together with the second support stand and to be movable in the width direction.

[0009] In this case, the lower lifting unit, the upper lifting unit and the lateral movement unit may be powered by a power supply unit installed outside the vehicle and operated via an operation panel mounted on the vehicle. Effect of the Invention

[0010] According to the present invention, the ceiling panel can be stably supported. [Brief description of the drawings]

[0011] [Figure 1] 1 is a side view (cross-sectional view) showing a ceiling panel removal device and a part of a tunnel according to an embodiment of the present invention. [Diagram 2] 1 is a side view showing a ceiling panel removal device according to an embodiment of the present invention. [Diagram 3] FIG. 2 is a rear view showing the ceiling panel removal device according to one embodiment of the present invention. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. [Diagram 5] FIG. 3 is a cross-sectional view of FIG. 2 . [Figure 6] 1 is a flowchart showing a ceiling panel removing method using a ceiling panel removing device according to an embodiment of the present invention. [Figure 7] FIG. 2 is a rear view showing the ceiling panel removal device according to one embodiment of the present invention, illustrating a first arrangement step of the ceiling panel removal method. [Figure 8] FIG. 2 is a rear view showing the ceiling panel removal device according to one embodiment of the present invention, illustrating a first supporting step of the ceiling panel removal method. [Figure 9] FIG. 2 is a rear view showing the ceiling panel removal device according to one embodiment of the present invention, illustrating a first ascending step of the ceiling panel removal method. [Figure 10] FIG. 2 is a rear view showing the ceiling panel removal device according to one embodiment of the present invention, illustrating a first lateral movement step of the ceiling panel removal method. [Figure 11] FIG. 2 is a rear view showing the ceiling panel removal device according to one embodiment of the present invention, illustrating a first lowering step of the ceiling panel removal method. [Figure 12] FIG. 4 is a rear view showing the ceiling panel removal device according to one embodiment of the present invention, illustrating a second supporting step of the ceiling panel removal method. [Figure 13] FIG. 4 is a rear view showing the ceiling panel removal device according to one embodiment of the present invention, illustrating a second lifting step of the ceiling panel removal method. [Figure 14] FIG. 4 is a rear view showing the ceiling panel removal device according to one embodiment of the present invention, illustrating a second lateral movement step of the ceiling panel removal method. [Figure 15] FIG. 4 is a rear view showing the ceiling panel removal device according to one embodiment of the present invention, illustrating a second lowering step of the ceiling panel removal method. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Note that Fr, Rr, L, R, U, and Lo shown in the drawings indicate front, rear, left, right, top, and bottom. The left-right direction (width direction), the front-rear direction (axial direction), and the up-down direction are perpendicular to each other. Terms indicating directions and positions are used in this specification, but these terms are used for convenience of explanation and do not limit the technical scope of the present invention.

[0013] A ceiling board removal device 1 according to one embodiment will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a side view (cross-sectional view) showing the ceiling board removal device 1 and a part of the tunnel 90. Fig. 2 is a side view showing the ceiling board removal device 1. Fig. 3 is a rear view showing the ceiling board removal device 1. Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 2. Fig. 5 is a cross-sectional view taken along line VV in Fig. 2.

[0014] The ceiling panel removal device 1 is used to remove a ceiling panel 91 of a tunnel 90 due to deterioration of the tunnel 90, changes to the ventilation system, etc. The tunnel 90 is, for example, a road tunnel. Prior to describing the ceiling panel removal device 1, a brief description will be given of the ceiling panel 91 and its installation structure.

[0015] [Ceiling panel] As shown in FIG. 1, the ceiling plate 91 is provided continuously along the axial direction (front-rear direction) of the tunnel 90. The ceiling plate 91 is, for example, structured by filling mortar into recesses (grooves) of a deck plate that is corrugated when viewed from the width direction (left-right direction) (not shown). The ceiling plate 91 is placed and fixed on a pair of supports 92 fixed to both side walls 90A in the width direction of the tunnel 90 (see FIG. 7, etc. described later). The ceiling plate 91 is also connected to the lower ends of a plurality of hanging jigs 93 suspended from the top wall 90B of the tunnel 90. The plurality of hanging jigs 93 are spaced apart in the width direction in the central region in the width direction and are arranged at approximately equal intervals in the axial direction (see also FIG. 7, etc. described later). As described above, the ceiling plate 91 is supported by the side walls 90A on both the left and right sides via the supports 92 at both left and right ends, and is supported by the top wall 90B via the two hanging jigs 93 at the middle part in the left-right direction.

[0016] [Ceiling board removal device] As shown in FIGS. 2 to 5, the ceiling board removing device 1 includes a vehicle 10, a lower support platform 20, an upper support platform 30, and a suspended scaffolding 15.

[0017] <Vehicle> As shown in Figs. 2 and 3, the vehicle 10 is capable of traveling in the tunnel 90 (on the road surface 94). The vehicle 10 includes, for example, a powered vehicle 11 equipped with a driver's seat, an engine, and the like, and a platform 12 connected to the rear of the powered vehicle 11. The powered vehicle 11 runs on the road surface 94, and the platform 12 is towed by the powered vehicle 11. The lower support platform 20 and the upper support platform 30 are mounted on the platform 12, and are formed shorter than the overall length (axial length) of the platform 12. A pair of base parts 13 (e.g., H-shaped steel members) are fixed to the platform 12 with a gap therebetween in the front-rear direction (see also Fig. 4). In addition, a plurality of work scaffolds 14 serving as work scaffolds are assembled on the platform 12 (see Fig. 2). Note that the work scaffolds 14 are not illustrated in the drawings other than Figs. 1 and 2.

[0018] <Lower support stand> The lower support platform 20 is formed in a lattice shape by assembling H-shaped steel bars, for example. As shown in Figs. 2 to 4, the lower support platform 20 is mounted on the platform 12 of the vehicle 10 via the lower lifting unit 21. The lower lifting unit 21 includes, for example, eight lower jacks 22. The lower jacks 22 are, for example, journal jacks (hydraulic jacks), and two are disposed near each of the four corners of the lower support platform 20. The two lower jacks 22 at each corner are disposed with a gap in the front-rear direction, and the two lower jacks 22 operate in conjunction as a pair. The lower jacks 22 are, for example, provided with a jack base 22A fixed to the lower support platform 20 and a ram 22B extending downward (see Fig. 3). The tips of the rams 22B of the four lower jacks 22 are connected to the top of each pedestal 13. Although not shown in the figure, the tip of the ram 22B is connected to the base portion 13 via a bearing surface portion having an approximately spherical shape, and is configured to keep the lower jack 22 (ram 22B) approximately vertical against the inclination of the vehicle 10.

[0019] <Upper support stand> 2 and 3, the upper support base 30 is stacked on the lower support base 20. The upper support base 30 has a first support base 31 mounted on the lower support base 20, a second support base 32 mounted on the first support base 31, and a lateral movement section 40 mounted on the first support base 31 and the second support base 32. The first support base 31 and the second support base 32 are formed in a lattice shape by assembling H-shaped steel members, for example.

[0020] (1st support stand) As shown in Figs. 2, 3 and 5, the first support stand 31 is supported on the lower support stand 20 via the upper lifting unit 33. The upper lifting unit 33 includes, for example, four upper jacks 34 (for example, journal jacks (hydraulic jacks)). The four upper jacks 34 are arranged near the four corners of the upper support stand 30. When viewed from the side, each upper jack 34 is arranged midway between two lower jacks 22 spaced apart in the front-rear direction (see Fig. 2). The upper jack 34 is provided, for example, with a jack base 34A fixed to the first support stand 31 and a ram 34B extending downward (see Fig. 3). The tip of the ram 34B of the upper jack 34 is connected to the lower support stand 20. Although not shown in the figure, the tip of the ram 34B is connected to the lower support base 20 via a bearing surface portion having an approximately spherical shape, and is configured to keep the upper jack 34 (ram 34B) approximately vertical against the inclination of the vehicle 10.

[0021] (Second support stand) As shown in FIG. 3, the second support stand 32 is stacked on the first support stand 31. Specifically, the second support stand 32 is placed on the first support stand 31 with a plurality of slide plates 35 sandwiched therebetween. More specifically, the H-shaped steel material of the second support stand 32 extending in the axial direction is placed on the upper surface of the H-shaped steel material of the first support stand 31 extending in the width direction. The slide plate 35 is, for example, a flat plate made of stainless steel, and is fixed to the upper surface of the H-shaped steel material of the first support stand 31. The second support stand 32 is provided so as to be slidable in the width direction on the first support stand 31 (slide plate 35) via a plurality of guide groove members 36. The guide groove member 36 is fixed to the lower flange of the H-shaped steel material of the second support stand 32 extending in the axial direction, and embraces the upper flange of the H-shaped steel material of the first support stand 31 extending in the width direction. That is, the upper flange of the H-shaped steel material of the first support stand 31 is slidably fitted into the guide groove member 36. Although details will be described later, the second support stand 32 supports the ceiling board 91 from below, and is moved in the width direction by the lateral movement part 40.

[0022] <Stroke of the lower and upper lifting parts> In this embodiment, the stroke of the upper jack 34 of the upper lifting unit 33 (lifting range of the ram 34B) is larger (longer) than the stroke of the lower jack 22 of the lower lifting unit 21 (lifting range of the ram 22B). In other words, the upper lifting unit 33 lifts and lowers the upper support base 30 to a greater extent than the lower lifting unit 21. The upper lifting unit 33 is used to roughly adjust the height of the upper support base 30, and the lower lifting unit 21 is used for fine adjustments such as adjusting the inclination (inclination in the axial direction, inclination in the width direction) of the lower support base 20 and the upper support base 30.

[0023] (Lateral movement part) As shown in Fig. 3, the lateral movement unit 40 includes, for example, two slide jacks 41 (only the rear one is shown in Fig. 3). The lateral movement unit 40 is, for example, a journal jack (hydraulic jack) and is arranged on both sides of the upper support stand 30 in the front-rear direction. The slide jack 41 has, for example, a jack base 41A fixed to the upper flange of the first support stand 31 and a tip end of a ram 41B fixed to the side surface (web) of the second support stand 32. The lateral movement unit 40 moves the second support stand 32 in the width direction (left-right direction).

[0024] <Suspended scaffolding> As shown in FIG. 2, the suspended scaffolding 15 is suspended from the rear of the second support stand 32 of the upper support stand 30. The suspended scaffolding 15 has a pair of cantilever beams 15A extending rearward from the second support stand 32, and a scaffolding with handrails 15B suspended from the pair of cantilever beams 15A. The scaffolding with handrails 15B is formed in a basket shape having a floor surface on which a worker is placed and a handrail section erected on the periphery of the floor surface. The suspended scaffolding 15 is provided so as to be able to ascend and descend together with the second support stand 32 and to be able to move in the width direction. Note that the suspended scaffolding 15 is omitted from the rear view of FIG. 3 and the like.

[0025] <Power supply section, operation panel> The lower lifting section 21, the upper lifting section 33, and the lateral movement section 40 are supplied with power from a power supply section 50. The power supply section 50 (generator) is not mounted on the vehicle 10, but is installed outside the vehicle 10. In Figs. 1 and 2, the power supply section 50 is installed on the road behind the vehicle 10 as an example, but is not limited thereto, and may be mounted on a vehicle other than the vehicle 10, or may be installed in front of the vehicle 10 (neither is shown). The power supply section 50 is connected to the lower lifting section 21, the upper lifting section 33, and the lateral movement section 40 via a power cable with a connector (not shown).

[0026] <Operation panel> The lower lifting section 21, the upper lifting section 33 and the lateral movement section 40 are operated via an operation panel 51 mounted on the vehicle 10 (cart 12). As shown in FIG. 2, a plurality of operation panels 51 are provided so that the various jacks 22, 34, 41 can be operated individually. In FIG. 2, as an example, two operation panels 51 are provided at a position adjacent to the rear of the front base section 13 and at a position adjacent to the front of the rear base section 13. The operation panels 51 are preferably disposed at positions where an operator can visually check the operating status of the various jacks 22, 34, 41. The operation panels 51 also receive power from the power supply section 50.

[0027] [How to remove ceiling board] Next, an example of a ceiling panel removal method using the ceiling panel removal device 1 will be described with reference to Fig. 1 and Fig. 6 to Fig. 15. Fig. 6 is a flow chart showing the ceiling panel removal method. Figs. 7 to 11 are rear views showing the ceiling panel removal device 1, and explain the first removal step S1 of the ceiling panel removal method. Figs. 12 to 15 are rear views showing the ceiling panel removal device 1, and explain the second removal step S2 of the ceiling panel removal method. It is assumed that, prior to carrying out the ceiling panel removal method, both left and right ends of the ceiling panel 91 are detached from the support base 92, and that a portion of the support base 92 that would interfere when removing the ceiling panel 91 is removed. It is also assumed that the rams 22B, 34B, 41B of the various jacks 22, 34, 41 are in the most retracted state (0 mm).

[0028] As shown in FIG. 1, a first removal area 95 and a second removal area 96 are set (divided) in the axial direction in the ceiling panel 91 of the tunnel 90. The second removal area 96 is set behind the first removal area 95. As shown in FIG. 6, the ceiling panel removal method includes a first removal step S1 for removing the ceiling panel 91 in the first removal area 95, and a second removal step S2 for removing the ceiling panel 91 in the second removal area 96. Here, the first removal area 95 and the second removal area 96 are areas (ranges) of the ceiling panel 91 that can be removed at one time by the ceiling panel removal device 1, and have an axial length that can be supported by the upper support stand 30 (second support stand 32). In the ceiling panel removal method, as an example, two ceiling panel removal devices 1 are used arranged in the width direction. In the following explanation, for convenience, the ceiling panel 91 removed in the first removal process S1 will be denoted with the symbol "A", and the ceiling panel 91 removed in the second removal process S2 will be denoted with the symbol "B", and in explanations common to both processes S1 and S2, only Arabic numerals will be used for the symbols.

[0029] <First removal process> As shown in Fig. 6, the first removal process S1 includes a first arrangement process S11, a first support process S12, a first rise process S13, a first lateral movement process S14, and a first descent process S15. The first support process S12 is performed substantially simultaneously by two ceiling board removal devices 1, but the first rise process S13, the first lateral movement process S14, and the first descent process S15 are not performed simultaneously by two ceiling board removal devices 1, and one ceiling board removal device 1 performs the above three processes S13, S14, and S15, and then the other ceiling board removal device 1 performs the above three processes S13, S14, and S15. In this specification, as an example, a case will be described in which the left ceiling board removal device 1 performs the first rise process S13, the first lateral movement process S14, and the first descent process S15.

[0030] (1st placement process) As shown in FIG. 1, in the first arrangement step S11, the two ceiling board removal devices 1 move backward and enter the tunnel 90 from the entrance and exit, and are arranged on the road surface 94 facing each other below the first removal area 95. As shown in FIG. 7, the two ceiling board removal devices 1 are installed so as to be lined up in the width direction (left and right direction) with an interval of, for example, about 700 mm between them, sandwiching the center line of the road surface 94 (road). Since the road surface 94 has a slight downward slope from the center in the width direction to both ends, the ceiling board removal device 1 (vehicle 10) is in a slightly inclined position in accordance with the slope of the road surface 94. In addition, the road surface 94 often has a slope in the axial direction as well, and the ceiling board removal device 1 (vehicle 10) may be in a tilted position in accordance with the slope of the road surface 94 in the axial direction. In addition, the ceiling board 91 is not necessarily formed horizontally due to a finished form error, etc.

[0031] An operator operates the operation panel 51 to drive the upper lifting unit 33 and the lower lifting unit 21. As shown in Fig. 7, in the first arrangement step S11, the upper lifting unit 33 (each upper jack 34) lifts the upper support platform 30 by a predetermined amount (e.g., about 200 mm), and then the lower lifting unit 21 (each lower jack 22) lifts the lower support platform 20 and the upper support platform 30, which are tilted together with the vehicle 10 (road surface 94), to approximately horizontal. The lower lifting unit 21 is driven until the distance between the top surface of the upper support platform 30 (second support platform 32) and the bottom surface of the ceiling board 91A becomes a predetermined value (e.g., about 100 mm).

[0032] (1st support process) In the first support step S12, the upper lifting unit 33 further lifts the upper support stand 30 to bring the second support stand 32 close to (but not in contact with) the underside of the ceiling board 91A. Thereafter, as shown in FIG. 8, the lower lifting unit 21 adjusts the heights of the lower support stand 20 and the upper support stand 30 so that the top surface of the second support stand 32 comes into contact with the underside of the ceiling board 91A.

[0033] In the first arrangement step S11 and the first support step S12, the rams 34B of the four upper jacks 34 are extended substantially the same, but the rams 22B of the four sets (eight) of lower jacks 22 may be extended differently. The height (posture) of the lower support stand 20 and the upper support stand 30 is adjusted by the rams 22B of the four sets of lower jacks 22 extending and retracting individually. This allows the second support stand 32 and the ceiling board 91A to face each other substantially parallel to each other with a predetermined gap therebetween, or the upper surface of the second support stand 32 to contact the lower surface of the ceiling board 91A substantially uniformly. As a result, the ceiling board 91A of the first removal area 95 is stably supported on the second support stand 32.

[0034] Next, the worker removes the central region in the width direction of the ceiling board 91A, and forms a lateral movement opening 97 in the ceiling board 91A of the first removal area 95. By forming the lateral movement opening 97, the ceiling board 91A is divided into two in the width direction. The width dimension of the lateral movement opening 97 is set to be more than twice the movement distance of the ceiling board 91A in the first lateral movement step S14 described later. In addition, the worker removes the multiple hanging jigs 93 that hang the ceiling board 91A of the first removal area 95. It is preferable that the worker stand on the suspended scaffolding 15 to perform the work of opening the lateral movement opening 97 and removing the hanging jigs 93.

[0035] (First rising process) 9, in the first ascending step S13, in the ceiling panel removal device 1 on the left, the upper-stage ascending / descending unit 33 further ascends the upper-stage support stand 30 supporting the ceiling panel 91A, and pulls the ceiling panel 91A upward away from the receiving stand 92. In the first ascending step S13, the lower-stage ascending / descending unit 21 is not driven, and maintains the height adjusted in the first supporting step S12.

[0036] (1st lateral movement process) As shown in Fig. 10, in the first lateral movement step S14, in the left ceiling board removal device 1, the lateral movement unit 40 (each slide jack 41) moves the second support base 32 supporting the ceiling board 91A toward the center in the width direction. The ceiling board 91A is moved substantially horizontally to a position where its outer end in the width direction does not interfere with the receiving base 92 and its center end in the width direction (the edge of the lateral movement opening 97) does not interfere with the ceiling board 91A supported by the right ceiling board removal device 1. In the first lateral movement step S14, the lower lifting unit 21 and the upper lifting unit 33 are not driven and maintain the height from the previous step.

[0037] (1st lowering process) As shown in FIG. 11, in the first lowering step S15, in the left ceiling panel removal device 1, the upper lifting unit 33 lowers the upper support stand 30 supporting the ceiling panel 91A. The ceiling panel 91A passes between the left receiving stand 92 and the ceiling panel 91A supported by the right ceiling panel removal device 1, and moves to a position lower than the height of the receiving stand 92. The rams 34B of each upper jack 34 should be in the most contracted state (0 mm). In the first lowering step S15, the lower lifting unit 21 and the lateral movement unit 40 are not driven, and maintain the height and position from the previous step.

[0038] Next, the ceiling board removal device 1 (vehicle 10) on the left side moves backward with the ceiling board 91A loaded thereon, and moves to the road surface 94 facing below the second removal area 96 (see FIG. 1). Meanwhile, the ceiling board removal device 1 on the right side performs the first ascending step S13, the first lateral movement step S14, and the first descending step S15 already described, and then moves backward to the road surface 94 facing below the second removal area 96.

[0039] <Second removal process> As shown in Fig. 6, the second removal process S2 includes a second arrangement process S21, a second support process S22, a second rise process S23, a second lateral movement process S24, and a second descent process S25. The second arrangement process S21, the second support process S22, the second rise process S23, the second lateral movement process S24, and the second descent process S25 are generally similar to the first arrangement process S11, the first support process S12, the first rise process S13, the first lateral movement process S14, and the first descent process S15 described above, so in the following description, the same description as for the first removal process S1 will be omitted. In addition, the case where the left ceiling panel removal device 1 performs the second rise process S23, the second lateral movement process S24, and the second descent process S25 will be described.

[0040] (Second placement process) In the second arrangement step S21, two ceiling board removal devices 1 are arranged on the road surface 94 facing the lower side of the second removal area 96 (see FIG. 12). The two ceiling board removal devices 1 are arranged so as to be lined up in the width direction at an interval (for example, about 600 mm) slightly narrower than that in the first arrangement step S11. In the second arrangement step S21, a worker places a plurality of buffer blocks 99 on the ceiling board 91A removed in the first removal step S1. The buffer blocks 99 are formed of, for example, hard synthetic rubber, and are provided to stably load the ceiling board 91B to be removed in the second removal step S2 on the ceiling board 91A. In the second arrangement step S21, the lower lifting unit 21, the upper lifting unit 33, and the lateral movement unit 40 are not driven, and maintain the height and position in the previous first lowering step S15. In addition, the worker may stand on the suspended scaffolding 15 to install the buffer blocks 99.

[0041] (Second support process) In the second support step S22, the upper lifting unit 33 lifts the upper support stand 30 to bring the ceiling board 91A (buffer blocks 99) loaded on the second support stand 32 close to the lower surface of the ceiling board 91B (non-contact). Thereafter, as shown in FIG. 12, the lower lifting unit 21 adjusts the height of the lower support stand 20 and the upper support stand 30 so that the upper surfaces of the buffer blocks 99 contact the lower surface of the ceiling board 91B. As a result, the ceiling board 91B in the second removal area 96 is supported from below by the upper support stand 30 via the ceiling board 91A and the buffer blocks 99. Next, the worker removes the central area in the width direction of the ceiling board 91B, forms a lateral movement opening 98 in the ceiling board 91B in the second removal area 96, and removes the multiple hanging jigs 93 that hang the ceiling board 91B. The width of the lateral movement opening 98 is slightly narrower than the width of the lateral movement opening 97, and is more than twice the movement distance of the ceiling board 91B in the second lateral movement step S24 described later.

[0042] (2nd ascending step, 2nd lateral movement step, 1st descending step) As shown in FIG. 13, in the second ascending step S23, in the left ceiling panel removal device 1, the upper-stage lifting unit 33 further lifts the upper-stage support stand 30 supporting the ceiling panel 91B, and pulls the ceiling panel 91B upward from the receiving stand 92. The ceiling panel 91B is stacked via a buffer block 99 at a position shifted outward in the width direction relative to the ceiling panel 91A. As shown in FIG. 14, in the second lateral movement step S24, in the left ceiling panel removal device 1, the lateral movement unit 40 (each slide jack 41) moves the second support stand 32 supporting the two ceiling panels 91 toward the center in the width direction. As shown in FIG. 15, in the second descending step S25, in the left ceiling panel removal device 1, the upper-stage lifting unit 33 lowers the upper-stage support stand 30 supporting the two ceiling panels 91, and places it below the height of the receiving stand 92.

[0043] Next, the left ceiling panel removal device 1 (vehicle 10) advances from the tunnel 90 toward the outside with two ceiling panels 91 loaded thereon, and carries the ceiling panels 91 out of the tunnel 90. The right ceiling panel removal device 1 performs the second ascending process S23, the second lateral movement process S24, and the second descending process S25 described above, and then advances from the tunnel 90 toward the outside, and carries the ceiling panel 91 out of the tunnel 90.

[0044] In this manner, the ceiling panels 91 in the first and second removal areas 95-96 are removed. If the tunnel 90 is long in the axial direction, a plurality of first and second removal areas 95-96 may be set and the above-described first and second removal steps S1, S2 may be repeatedly performed. The above-described ceiling panel removal method is merely one example, and the order (procedure) may be changed in various ways without departing from the spirit of the technical concept.

[0045] In the ceiling panel removal device 1 according to the present embodiment described above, the upper lifting unit 33 lifts and lowers the upper support platform 30 to a greater extent than the lower lifting unit 21, and the lower lifting unit 21 adjusts the inclination of the upper support platform 30. With this configuration, even if there is a gradient of the road surface 94 in the tunnel 90 or an error in the finished shape of the ceiling panel 91, the lower lifting unit 21 can easily adjust (correct) the inclination of the upper support platform 30, and the gap between the upper support platform 30 and the ceiling panel 91 can be made approximately uniform. This allows the upper support platform 30 to stably support the ceiling panel 91. In addition, for example, by dividing the lifting unit into two stages, the upper lifting unit 33 and the lower lifting unit 21, a necessary and sufficient stroke can be secured even if an inexpensive jack with a short stroke is used for each lifting unit 21, 33. This eliminates the need to use expensive (high performance) jacks with long strokes for each of the lifting sections 21, 33, and therefore the manufacturing cost of the ceiling panel removal device 1 can be reduced.

[0046] In addition, in the ceiling panel removal device 1 according to this embodiment, the upper support base 30 supporting the ceiling panel 91 divided in two at the center in the width direction is moved toward the center in the width direction by the lateral movement unit 40. With this configuration, the ceiling panel 91 is separated from the side wall 90A of the tunnel 90 toward the center, so that the ceiling panel 91 can be prevented from contacting the side wall 90A of the tunnel 90 during removal. In addition, the lateral movement unit 40 only needs to move the second support base 32 laterally, and therefore a low-output, inexpensive jack can be used for the lateral movement unit 40 compared to the case where the entire upper support base 30 is moved laterally. This allows the manufacturing cost of the ceiling panel removal device 1 to be further reduced.

[0047] Moreover, in the ceiling panel removal device 1 according to this embodiment, the suspended scaffold 15 is suspended from the rear of the upper support stand 30 (second support stand 32) and is provided so as to be capable of ascending and descending and moving in the width direction together with the upper support stand 30. With this configuration, it becomes unnecessary to repeatedly set up and remove the work scaffold as the vehicle 10 moves, so that various tasks required for removing the ceiling panel 91 can be performed efficiently.

[0048] Moreover, according to the ceiling board removal device 1 of this embodiment, since the power supply unit 50 is installed outside the vehicle 10, even if a problem such as a breakdown of the power supply unit 50 occurs, the power supply unit 50 can be easily replaced with a spare power supply unit 50. This makes it possible to shorten the time during which the removal work of the ceiling board 91 is interrupted due to a problem with the power supply unit 50. Furthermore, according to this ceiling board removal device 1, since the operation panels 51 of the lifting units 21, 33, etc. are mounted on the vehicle 10, the worker can adjust (correct) the height and posture of the upper support stand 30 while visually checking them.

[0049] In the ceiling panel removal device 1 according to the present embodiment, the upper lifting unit 33 lifts and lowers the upper support stand 30 by a large amount, and the lower lifting unit 21 adjusts the inclination of the upper support stand 30, but the present invention is not limited to this. Conversely, the lower lifting unit 21 may lift and lower the upper support stand 30 by a large amount, and the upper lifting unit 33 may adjust the inclination of the upper support stand 30.

[0050] In addition, in the ceiling board removal device 1 according to the present embodiment, the upper support platform 30 is configured in two stages, the first support platform 31 and the second support platform 32, but the present invention is not limited to this. The upper support platform 30 may be configured in one stage, for example, with only the first support platform 31 (not shown). In this case, the horizontal movement unit 40 supports the upper lifting unit 33 (upper jack 34) so ​​as to be movable in the width direction, and the upper support platform 30 is moved in the width direction via the upper lifting unit 33 (not shown). In this case, the suspended scaffolding 15 may be suspended from the rear of the first support platform 31 (not shown).

[0051] In addition, in the ceiling panel removal device 1 according to this embodiment, the suspended scaffolding 15 is suspended from the rear of the second support stand 32, but the present invention is not limited to this. For example, if there is space in front of the platform 12 (between the platform 12 and the powered vehicle 11), the suspended scaffolding 15 may also be suspended from the front of the second support stand 32 (not shown).

[0052] In the ceiling board removing method using the ceiling board removing device 1 according to the present embodiment, the second removal area 96 is set behind the first removal area 95, but it may be set in front of the first removal area 95 (not shown). In addition, the ceiling board removing device 1 advances backward to enter the inside of the tunnel 90 from the entrance and advances forward to carry the removed ceiling board 91 out of the tunnel 90, but the present invention is not limited to this. Conversely, the ceiling board removing device 1 may advance forward to enter the inside of the tunnel 90 from the entrance and advances backward to carry the removed ceiling board 91 out of the tunnel 90.

[0053] In addition, in the ceiling panel removal method using the ceiling panel removal device 1 of this embodiment, the lateral movement openings 97, 98 are formed in the first support step S12 and the second support step S22, but this is not limited to the above and they may be formed prior to carrying out the ceiling panel removal method.

[0054] In the ceiling panel removing method using the ceiling panel removing device 1 according to the present embodiment, the first and second descending steps S15, S25 are performed without moving the ceiling panel removing device 1 after the first and second lateral movement steps S14, S24, but the present invention is not limited to this. For example, after the first and second lateral movement steps S14, S24, the ceiling panel removing device 1 may be advanced (or retreated) toward the area where the ceiling panel 91 has already been removed or toward the outside of the tunnel 90, and the ceiling panel removing device 1 may be placed in a place where there is no height restriction due to the ceiling panel 91, and the first and second descending steps S15, S25 may be performed (not shown).

[0055] In addition, in the ceiling panel removing method using the ceiling panel removing device 1 according to the present embodiment, the first removing step S1 is followed by the second removing step S2, but the present invention is not limited to this. For example, the second removing step S2 may be omitted, and the ceiling panel removing method may include only the first removing step S1. In other words, the ceiling panel removing device 1 may carry out one ceiling panel 91 from the tunnel 90 while it is placed on the second support stand 32 (not shown).

[0056] In the ceiling panel removal method using the ceiling panel removal device 1 according to the present embodiment, two ceiling panel removal devices 1 are arranged in the width direction and used, but the present invention is not limited to this. For example, multiple ceiling panel removal devices 1 may be arranged in the axial direction to remove ceiling panels 91 in multiple removal areas, or one ceiling panel removal device 1 may remove the ceiling panel 91 in one removal area (neither is shown). In these cases, the lateral movement unit 40 (first lateral movement process S14, second lateral movement process S24) may be omitted (not shown).

[0057] The above embodiment is merely an example of the ceiling panel removal device according to the present invention, and the technical scope of the present invention is not limited to the above embodiment. The present invention may be modified, substituted, or altered in various ways without departing from the spirit of the technical concept, and the claims include all embodiments that may be included within the scope of the technical concept. [Explanation of symbols]

[0058] 1 Ceiling board removal device 10 Vehicles 15 Suspended scaffolding 20 Lower support stand 21 Lower lift section 30 Upper support stand 31 1st support stand 32 Second support stand 33 Upper lift section 40 Horizontal movement section 50 Power supply section 51 Control panel 90 Tunnel 91 Ceiling Panel

Claims

1. A ceiling panel removal device used to remove ceiling panels of a tunnel, A vehicle capable of traveling within the tunnel; A lower support platform that is mounted on the vehicle via a lower lifting unit; an upper support base that is mounted on the lower support base via an upper lifting unit and supports the ceiling panel from below; One of the lower lifting unit and the upper lifting unit lifts and lowers the upper support platform to a greater extent than the other of the lower lifting unit and the upper lifting unit, A ceiling panel removal device, characterized in that the other of the lower lifting unit and the upper lifting unit adjusts the inclination of the upper support platform.

2. The upper support base is A first support platform is mounted on the lower support platform and supported via the upper lifting unit; a second support stand mounted on the first support stand and supporting the ceiling panel from below; The ceiling panel removal device according to claim 1, further comprising a lateral movement unit mounted on the first support base and the second support base and configured to move the second support base in the width direction of the tunnel.

3. The ceiling panel removal device according to claim 2, further comprising a suspended scaffolding suspended from the rear of the second support stand and capable of ascending and descending together with the second support stand and of moving in the width direction.

4. The ceiling panel removal device described in claim 2 or 3, characterized in that the lower lifting unit, the upper lifting unit and the lateral movement unit are powered by a power supply unit installed outside the vehicle and operated via an operation panel mounted on the vehicle.

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