Conveyor

Abstract

A transport device capable of efficiently performing work on a structure having an arch-shaped top is provided. [Solution] A transport device (4) installed on a structure with an arched top comprises an arched rail (5) attached to the inner surface of the top, a traveling means (6) that moves along the arched rail (5), a connecting means (7) suspended from the traveling means (6), and a hoist (8) supported by the connecting means (7). The connecting means (7) is rotatable around a horizontal axis perpendicular to the arched rail (5).

Description

[Technical Field]

[0001] The present invention relates to a transport device that is installed on a ceiling portion on an arc. [Background technology]

[0002] Overhead cranes are sometimes used as transport devices for materials and the like inside structures. An overhead crane is equipped with a track installed along the depth direction of the structure, a running girder that runs horizontally across the track, and a hoist that is mounted on the running girder so that it can move laterally. The running track of an overhead crane is generally straight, but in structures that have a slope such that the center is higher than the periphery, a running girder that follows the shape of the ceiling is used.

[0003] For example, Patent Documents 1 and 2 disclose overhead cranes that include a running track installed along the depth direction, a running girder that is suspended horizontally on the running track so that it can run, and a hoist that can move along the running girder, where the center of the running girder is higher than both ends. The running girder in Patent Documents 1 and 2 includes multiple straight sections and curved sections that connect the straight sections. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-132557 [Patent Document 2] Japanese Patent Application Laid-Open No. 2013-056742 Summary of the Invention [Problem to be solved by the invention]

[0005] The overhead cranes described in Patent Documents 1 and 2 have straight running girders and are therefore unsuitable for structures with arched tops. An object of the present invention is to provide a transport device that can efficiently perform work on a structure having an arch-shaped top. [Means for solving the problem]

[0006] To solve the above problems, the present invention provides a transport device installed on a structure with an arched top, comprising an arched rail attached to the inner surface of the top, a traveling means that moves along the arched rail, a connecting means suspended from the traveling means, and a hoist supported by the connecting means. The connecting means is rotatable around a horizontal axis perpendicular to the arched rail.

[0007] This conveying device uses arched rails, so even if the structure has an arched top, it can maximize the lifting height that can be used at the bottom of the hoist. In addition, by using arched rails that match the shape of the top, it is possible to maximize the left and right range of movement.

[0008] The connecting means preferably has a support portion fixed to the traveling means and a lateral rail extending in a direction perpendicular to the arched rail and rotatable about the lateral axis relative to the support portion. In this case, the hoist is preferably movable using the lateral rail as a rail.

[0009] With this conveying device, when multiple hoists are used to perform different tasks at multiple locations in the transverse direction, each hoist can be positioned at a different position in the depth direction, further improving work efficiency. [Effects of the Invention]

[0010] According to the transport device of the present invention, it is possible to efficiently carry out work on a structure having an arch-shaped top. [Brief explanation of the drawings]

[0011] [Figure 1]1 is a cross-sectional view showing an underground structure in which a transport device according to the present embodiment is installed. [Figure 2] FIG. 1 is a longitudinal cross-sectional view of an underground structure. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] 1A and 1B are diagrams showing a part of a conveying device, in which (a) is an enlarged cross-sectional view and (b) is an enlarged longitudinal section view. [Figure 6] (a) is a cross-sectional view showing the construction status of an underground structure, and (b) is a cross-sectional view showing the construction status of an underground structure following (a). [Figure 7] 6(a) is a cross-sectional view showing the construction status of the underground structure following FIG. 6(b), and FIG. 6(b) is a cross-sectional view showing the construction status of the underground structure following FIG. 6(a). [Figure 8] This is a cross-sectional view showing the construction status of the underground structure following Figure 7(b). DETAILED DESCRIPTION OF THE INVENTION

[0012] In this embodiment, a conveying device to be installed in an underground structure with a circular cross section (a structure with an arch-shaped top) will be described. An underground structure 1 according to this embodiment is shown in FIGS. 1 and 2. The underground structure 1 is a rib formed at the end of an underground space (such as a road junction) formed using existing tunnels 11 and 12, and as shown in FIGS. 1 and 2, is composed of two ring-shaped tunnels 2 and 2 arranged side by side and a pair of earth retaining walls 3 and 3 that shield the ends. The two ring-shaped tunnels 2 and 2 are arranged side by side in the axial direction of the existing tunnels 11 and 12. A conveying device 4 is provided inside the underground structure 1. The configuration of the underground structure 1 in which the conveying device 4 is installed is not limited.

[0013] 3 and 4 show the transport device 4. As shown in FIGS. 3 and 4, the transport device 4 includes an arched rail 5, a traveling means 6, a connecting means 7, and a hoist 8.

[0014] The arched rail 5 is attached to the inner surface of the upper part (including the top) of the underground structure 1. The arched rail 5 is made of steel (H-beam, I-beam, channel steel, etc.) with a flange on the radially inner side and is fixed to the inner surface of the lining of the ring-shaped tunnel 2 via multiple foundation metals 51 fixed to the lining of the underground structure 1 (the lining of the ring-shaped tunnel 2 in this embodiment). The multiple foundation metals 51 are arranged side by side at intervals in the circumferential direction of the underground structure 1 (ring-shaped tunnel 2). Figure 5 shows a portion of the arched rail 5. As shown in Figure 5, the foundation metal 51 is a bracket that supports the transport device 4 and includes an anchor 52 fixed to the ring-shaped tunnel 2 (outer shell 10) and a base 53 that connects the anchor 52 to the arched rail 5. The anchor 52 may be fixed to concrete poured in the ring-shaped tunnel 2. The base 53 is formed to a predetermined height by combining steel materials. An anchor 52 is fixed to one end of the base 53 (the end on the ring-shaped tunnel 2 side). The other end of the base 53 is bolted to the arch-shaped rail 5. A height adjustment material 54 (a material that adjusts the height to absorb construction errors in the ring-shaped tunnel 2 and ensures the roundness of the rail) is interposed between the arch-shaped rail 5 and the base 53. In this embodiment, a pair of arch-shaped rails 5, 5 are installed side by side with a gap in between in the depth direction of the underground structure 1. In addition, a rack 55 is formed on the radially inner surface of the arch-shaped rail 5.

[0015] The traveling means 6 travels along the arch-shaped rail 5. In this embodiment, the traveling means 6 includes a traveling section 61, a pair of cross beams 62, 62, and a vertical beam 63. Two traveling sections 61 are provided for each arch-shaped rail 5. That is, the traveling means 6 in this embodiment includes four traveling sections 61, 61, ... spaced apart in the front-rear and left-right directions. The traveling sections 61 include multiple sets of wheels arranged to sandwich the flange of the arch-shaped rail 5 from the inside and outside. Each wheel is capable of rolling on the surface of the flange of the arch-shaped rail 5. At least one traveling section 61 includes a pinion (not shown) that meshes with the rack 55 of the arch-shaped rail 5 from the radially inside. The traveling means 6 travels along the rack 55 by rotating the pinion. The cross beam 62 is arranged parallel to a line (tangent) tangent to the inner or outer edge of the arch-shaped rail 5. The cross beam 62 connects a pair of running parts 61, 61 adjacent in the circumferential direction of the arched rail 5. The vertical beam 63 is disposed in a direction perpendicular to the arched rail 5 and connects adjacent cross beams 62, 62 in the front and rear. The vertical beam 63 is fixed to the center of the cross beam 62 in the longitudinal direction. In other words, the running means 6 has a platform that is H-shaped in plan view and formed by the cross beams 62, 62 and the vertical beam 63, and the running part 61 is attached to the end of the platform. The running means 6 is equipped with a motor 64 that applies a rotational force to the pinion of at least one running part 61.

[0016] The connecting means 7 is suspended from the traveling means 6. The connecting means 7 has a support portion 71 fixed to the vertical beam 63 and a horizontal rail 72 extending in a direction perpendicular to the arched rail 5. In this embodiment, two support portions 71, 71 are fixed to the vertical beam 63. The horizontal rail 72 is suspended horizontally between the two support portions 71, 71. The support portion 71 has a first fixed portion 73 fixed to the vertical beam 63, a second fixed portion 74 fixed to the horizontal rail 72, and a connecting shaft 75 (horizontal shaft) connecting the first fixed portion 73 and the second fixed portion 74. The connecting shaft 75 is made of a pin perpendicular to the arched rail 5. The connecting means 7 is rotatable around the connecting shaft 75 (horizontal shaft) perpendicular to the arched rail 5. That is, the traverse rail 72 is rotatable relative to the first fixed part 73 around the connecting shaft 75, and when the traveling means 6 is located in the upper half of the arched rail 5, the traverse rail 72 and the weight of the hoist 8 always maintain the same posture. The traverse rail 72 is made of steel material with a flange (H-beam, I-beam, channel steel, etc.).

[0017] The hoist 8 is supported by the connecting means 7. The hoist 8 is supported on the traverse rail 72 via a traverse device 81. The traverse device 81 is capable of traversing the traverse rail 72. In other words, the hoist 8 can move in a direction perpendicular to the arched rail 5, using the traverse rail 72 as a guideway. In the hoist 8 of this embodiment, wheels that can roll on the flanges of the traverse rail 72 are arranged on both sides of the web of the traverse rail 72. The hoist 8 is equipped with a motor that applies a rotational force to at least one wheel.

[0018] According to the transport device 4 of this embodiment, because an arched rail 5 is used, it is possible to maximize the lifting height available below the hoist 8, even for a structure (underground structure 1) with an arched top. Furthermore, by using an arched rail 5 that matches the shape of the top, it is possible to maximize the range of movement to the left and right. Note that if the arched rail 5 is a single arc (the radius of the arched rail 5 is constant), the positional relationship (meshing state) between the rack 55 and the pinion is constant regardless of location, which reduces problems caused by jamming compared to rails that combine curved and straight sections.

[0019] The transport device 4 can move the position of the hoist 8 in the circumferential direction along the arched rail 5, and can also move the position of the hoist 8 in the depth direction via the lateral rail 72. In other words, the transport device 4 can move the position of the hoist 8 forward, backward, left, and right. Therefore, even when multiple hoists 8 are used to perform different tasks at multiple locations in the lateral direction, each hoist 8 can be positioned at a different position in the depth direction, further improving work efficiency.

[0020] Because the traverse rail 72 can rotate around the horizontal axis (connecting shaft 75), the posture of the hoist 8 can be kept vertical by gravity regardless of the stopping position of the traveling means 6 on the arched rail 5. Therefore, when a load is suspended, the direction of the hoist 8 becomes the same as the direction of the wire (wire, etc.), and the load on the hoist 8 during suspension can be minimized.

[0021] The following describes the construction of an underground structure 1 as an example of the use of the transport device 4. The construction of the underground structure 1 involves forming a ring-shaped tunnel 2 (outer shell 10) that surrounds existing tunnels 11 and 12, then excavating the area surrounded by the ring-shaped tunnel 2 and forming an earth retaining wall 3 (see Figures 1 and 2). Figures 6 to 8 show the construction status of the underground structure 1.

[0022] First, as shown in Figure 6(a), a vertical shaft 13 is formed as an earth removal hole and an access road from the existing tunnel 11. The upper end of the vertical shaft 13 faces the inner surface of the outer shell 10 (ring-shaped tunnel 2). At this time, the ground at the front and rear ends of the outer shell 10 is frozen to form a frozen soil wall.

[0023] Next, as shown in Figure 6(b), the top is excavated inside the outer shell 10. The surplus soil generated during the excavation is discharged from the pit 13. As the top is excavated, the pit 13 is widened to provide space for climbing up and down, a route for carrying in materials, etc. (see Figure 7(a)). Once the excavation of the top has progressed, as shown in Figure 7(b), a transport device 4 is installed on the inner surface of the outer shell 10, and retaining walls 3 are formed in front of and behind the hollow space to shield the exposed ground. The materials and equipment used to construct the retaining wall 3 are transported to the bottom of the shaft 13 using the existing tunnel 11, and then the transport device 4 positioned above the shaft 13 is used to hoist the materials and equipment from inside the existing tunnel 11 through the shaft 13 to the hollow space at the top, and the transport device 4 is then moved along the arched rails 5 to move the materials and equipment to a predetermined position within the internal space at the top.

[0024] As shown in Figure 8, as excavation inside the shell 10 and construction of the retaining wall 3 progress, the arched rails 5 of the conveying device 4 are extended in the circumferential direction of the shell to widen the range of motion of the hoist 8. This allows the conveying device 4 to be used to move materials and equipment throughout the entire interior of the shell 10. By repeating the same operations, the hollow portion of the outer shell 10 is excavated and the retaining wall 3 is constructed, thereby forming the underground structure 1.

[0025] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and each of the above-described components can be appropriately modified within the scope of the invention. For example, the structure on which the conveying device 4 is installed is not limited to an underground structure as long as it has an arched top, and may be, for example, a dome-shaped building or factory formed above ground. [Explanation of symbols]

[0026] 1 Underground structure 2 Ring Tunnel 3 Retaining wall 4. Conveyor equipment 5 Arched rails 51 Foundation hardware 6. Means of transportation 61 Running part 62 Crossbeam 63 Stringer 7 Connection means 71 Support part 72 Traverse rail 73 First fixed part 74 Second fixed part 75 Connecting shaft (horizontal shaft) 8. Hoist 81 Traversing device

Claims

1. A conveying device provided on a structure having an arched top, an arched rail attached to the inside surface of the top; a travel means that travels along the arch-shaped rail; a connecting means suspended from the traveling means; a hoist supported by the connecting means, The conveying device is characterized in that the connecting means is rotatable about a horizontal axis perpendicular to the arch-shaped rail.

2. the connecting means has a support portion fixed to the traveling means and a lateral rail extending in a direction perpendicular to the arched rail, the lateral rail is rotatable relative to the support portion about the lateral axis, 2. The transport device according to claim 1, wherein the hoist is movable using the lateral rail as a rail.

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