Upper lift suppression device, structure, and method for mounting upper lift suppression device

Abstract

To provide an upper lift suppression device that can reduce the number of parts and labor required for installation work.SOLUTION: An upper lift suppression device 10 is disposed together with a support unit 50 between an upper structure 100 and a lower structure 200, the upper lift suppression device comprising an upper rail plate 11A connected to the upper structure via girder mounting bolts 12, a lower rail plate 16A connected to the lower structure via an anchor bolt 17, and a guide member 13 that has a first groove 14 movably engaging the upper rail plate in a linear direction and a second groove 15 movably engaging the lower rail plate in a direction perpendicular to the linear direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an uplift suppression device that is applied to structures such as various bridges, including road bridges and railway bridges, and to a structure and an installation method for an uplift suppression device. [Background technology]

[0002] Various bridges, such as road bridges and railway bridges, cannot avoid the effects of vibrations and shaking caused by wind and waves and earthquakes. Therefore, it is desirable for these types of structures to have a structure that can mitigate horizontal movement and suppress the effects of vertical external forces. Therefore, a conventional configuration is known in which a device for resisting upward lifting force is installed between the upper structure and the lower structure via a support (see, for example, Patent Document 1). The device described in Patent Document 1 is described as an upper lift-force resistance device that is installed between an upper structure and a lower structure stacked together via supports and is provided with an uplift prevention member that prevents the upper structure from lifting up relative to the lower structure. Furthermore, this upper lift-force resistance device is configured such that an upper groove is formed horizontally on the upper structure side, a lower groove is formed horizontally on the lower structure side so as to intersect with the upper groove, and the uplift prevention member is inserted vertically into the upper groove and the lower groove. Furthermore, the uplift prevention member includes an anchor bar inserted into the upper groove and the lower groove, and upward force resistance plates attached to the upper and lower ends of the anchor bar and sandwiching the upper plate with the upper groove and the lower plate with the lower groove. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-154569 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the device of Patent Document 1, an upper groove is formed in the center of the upper plate, and a lower groove is formed in the center of the lower plate, which means that bolts for connecting the upper plate to the upper structure and bolts for connecting the lower plate to the lower structure need to be placed on either side of the upper groove and the lower groove, respectively, which increases the number of parts and makes installation work very time-consuming.

[0005] The present invention was devised in consideration of the above-mentioned configuration, and its objective is to propose an upward lift suppression device and structure, as well as an installation method for an upward lift suppression device, that can reduce the number of parts and the effort required for installation. [Means for solving the problem]

[0006] The upper lift suppression device of the present invention, which solves the above-mentioned problem, is an upper lift suppression device that is arranged together with a support part between an upper structure and a lower structure, and is configured to include an upper rail plate connected to the upper structure via a girder mounting bolt, a lower rail plate connected to the lower structure via an anchor bolt, and a guide member having a first groove portion that engages the upper rail plate so as to be freely movable in a linear direction, and a second groove portion that engages the lower rail plate so as to be freely movable in an orthogonal direction perpendicular to the linear direction.

[0007] The structure of the present invention, which solves the above problem, is a structure equipped with the above-mentioned upper lift suppression device, and is configured so that the above-mentioned upper lift suppression device is installed together with a support part between the upper structure and the lower structure. Furthermore, a method for installing an upper lift suppression device according to the present invention for solving the above-mentioned problems is a method for installing an upper lift suppression device installed between an upper work and a lower work, comprising the steps of: attaching a lower rail plate to anchor bolts provided on the lower work via couplers and coupler mounting bolts; positioning a guide member having a first groove on an upper side and a second groove below the first groove in a direction perpendicular to the first groove by inserting the lower rail plate into the second groove; inserting an upper rail plate having a plurality of girder mounting bolts spaced apart in the longitudinal direction into the first groove of the guide member in a direction perpendicular to the lower rail plate by inserting the upper rail plate into the first groove of the guide member in a direction perpendicular to the lower rail plate; and attaching the girder mounting bolts of the upper rail plate to a girder member of the upper work. [Effects of the Invention]

[0008] The upper rail plate and the lower rail plate can be movably positioned in the first groove of the guide member and the second groove of the guide member, respectively. This allows, for example, girder mounting bolts to be positioned on the upper rail plate and anchor bolts to be positioned in a single row on the lower rail plate. Therefore, the upper lift suppression device and structure of the present invention can reduce the number of parts and the labor required for installation. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a cross-sectional view schematically illustrating a vertical cross section of a structure showing an example in which an upward lift suppression device according to a first embodiment is installed. [Figure 2] 1 is a schematic diagram showing an example of a structure in which an upper lift suppression device according to a first embodiment is installed, with the superstructure omitted. [Figure 3] 1 is a side view illustrating an example of an upper lift suppression device according to a first embodiment with a portion thereof omitted. [Figure 4] 1 is a front view illustrating an example of an upper lift suppression device according to a first embodiment with a portion thereof omitted. [Figure 5]1 is an exploded perspective view illustrating an example of an upper lift suppression device according to a first embodiment with a portion thereof omitted. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. [Figure 7A] 3 is a side view schematically showing a state in which the guide member and the upper moving part of the upper lift force suppression device according to the first embodiment are inclined. FIG. [Figure 7B] 7B is an enlarged schematic view of the guide member and the lower rail plate of FIG. 7A. FIG. [Figure 8] 4 is a flowchart showing a method for installing an upward lift suppression device according to an embodiment. [Figure 9A] FIG. 10 is a side view illustrating an example of an upper lift suppression device according to a second embodiment with a portion thereof omitted. [Figure 9B] FIG. 10 is a front view illustrating an example of an upper lift suppression device according to a second embodiment with a portion thereof omitted. [Figure 9C] FIG. 10 is a side view schematically showing a state in which the guide member of the upper lift suppression device according to the second embodiment is inclined. [Figure 9D] 9B is an enlarged schematic view of the guide member and the lower rail plate of FIG. 9A. FIG. [Figure 10A] FIG. 11 is a side view illustrating an example of an upper lift suppression device according to a third embodiment with a portion thereof omitted. [Figure 10B] FIG. 11 is a front view illustrating an example of an upper lift suppression device according to a third embodiment with a portion thereof omitted. [Figure 10C] FIG. 11 is a side view schematically showing a state in which the guide member of the upward lift suppression device according to the third embodiment is inclined. [Figure 10D] 10B is an enlarged schematic view showing the guide member and the lower rail plate of FIG. 10A. FIG. [Figure 11] 10A and 10B are schematic diagrams illustrating modified examples of the lower rail plate of the upper lift force suppression device according to the present invention. [Figure 12] FIG. 10 is a side view showing a modified example of the guide member of the upward lift suppression device according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of the present invention will be described with reference to the drawings. In the following description, the configuration of the first embodiment will be described first, and then the construction method will be described. Note that the lengths and relationships between the components of each part of the ground may be exaggerated. As shown in Figures 1 and 2, the structure 300 is, for example, a road bridge, and has a bearing 50 disposed between the upper structure 100 and the lower structure 200, and an upward lift suppression device 10 disposed to suppress the upward lift of the upper structure 100. Two bearings 50 are disposed for each pier, which is the lower structure 200. The upward lift suppression device 10 is disposed in approximately the center of the pier, between the two bearings 50, 50. The upper structure 100 is also configured so that a deck support 120 is disposed on top of the bridge girder 110 for installing deck plates and asphalt.

[0011] As shown in Figures 1, 3 and 4, the upper lift suppression device 10 comprises an upper moving section 11 having a vertical shaft 11d connected to the upper structure 100 via a girder mounting bolt 12 and an upper rail plate 11A connected to the vertical shaft 11d, a lower moving section 16 having a hanging shaft 16d connected to the lower structure 200 via an anchor bolt 17 and a lower rail plate 16A connected to the hanging shaft 16d, and a guide member 13 having a first groove portion 14 that engages with the upper rail plate 11A so as to be freely movable in a linear direction, and a second groove portion 15 that engages with the lower rail plate 16A so as to be freely movable in an orthogonal direction perpendicular to the linear direction (movement direction) of the upper rail plate 11A.

[0012] Although upper rail plate 11A is described as having vertical axis 11d, it may be a flat surface continuous with upper rail horizontal surface 11c without vertical axis 11d. Furthermore, lower rail plate 16A is described as having vertical axis 16d, but it may be a flat surface continuous with lower rail horizontal surface 16c without vertical axis 11d.

[0013] As shown in Figures 1 and 3, the upper moving part 11 includes a vertical shaft 11d on which a girder mounting bolt 12 is installed to be attached to a cross beam 130 of the bridge girder 110, and an upper rail plate 11A formed continuously with the vertical shaft 11d. In one example, the upper moving part 11 is formed by integrally using a metal material for the vertical shaft 11d and the upper rail plate 11A. The upper moving part 11 is installed by detachably attaching the girder mounting bolt 12 to the cross beam 130. With the upper moving part 11 attached to the cross beam 130, the guide member 13 is inserted and arranged so that the guide member 13 hangs from the upper moving part 11.

[0014] 3 and 5, upper rail plate 11A is engaged with first groove 14 of guide member 13 so as to be movable linearly along first groove 14 of guide member 13. Upper rail plate 11A is attached to cross beam 130 (see FIG. 1) with upper rail top surface 11a facing downward. That is, upper rail plate 11A is oriented such that upper rail top surface 11a is located on the bottom surface side and vertical shaft bottom surface 11e is located on the top surface side. The upper rail plate 11A includes an upper rail top surface 11a, upper rail side surfaces 11b, 11b that extend vertically from both ends of the upper rail top surface 11a, and upper rail horizontal surfaces 11c, 11c that extend horizontally from the other ends of the upper rail side surfaces 11b, 11b. The upper rail plate 11A is formed so that the other ends of the upper rail horizontal surfaces 11c, 11c extend vertically to a vertical shaft 11d. The vertical shaft 11d has a vertical shaft bottom surface 11e, which is its bottom surface, on which a plurality of girder mounting bolts 12 are arranged, for example, at equal intervals in a row along the longitudinal direction. The vertical shaft bottom surface 11e is formed with an internal thread so that the girder mounting bolts 12 can be threaded into and removed from the vertical shaft bottom surface 11e.

[0015] As shown in Fig. 3, upper rail plate 11A has a shape with peaks and / or curved portions along its length. For example, upper rail top surface 11a is formed to have a curved portion. Upper rail plate 11A has a shape with the following peaks along its length: curved upper rail top surface 11a; two peaks at the corners where upper rail top surface 11a intersects with upper rail side surfaces 11b, 11b; and two peaks at the corners where upper rail side surfaces 11b, 11b intersect with upper rail horizontal surfaces 11c, 11c. In other words, upper rail plate 11A has a shape with one curved portion and four peaks along its length. The upper rail top surface 11a is a portion that moves along the first guide bottom surface 14a of the guide member 13. As an example, the upper rail top surface 11a is formed as a curved surface portion having an arc-shaped cross section. The upper rail top surface 11a is formed cylindrically so that the cross section has an arc-shaped shape that continues in the longitudinal direction.

[0016] The upper rail side surfaces 11b, 11b are formed vertically continuously from both ends of the upper rail top surface 11a, on both sides of the upper rail top surface 11a. The upper rail side surfaces 11b, 11b are formed to a length such that the thickness from the upper rail top surface 11a to the upper rail horizontal surfaces 11c, 11c is a predetermined value. The upper rail side surfaces 11b, 11b are formed to be vertical surfaces, for example, but may also be inclined surfaces, for example, by inclining them toward the vertical axis 11d or inclining them away from the vertical axis 11d. In order to increase the area of ​​the upper rail horizontal surfaces 11c, 11c without changing the short-side length of the upper rail top surface 11a, the upper rail side surfaces 11b, 11b may also be inclined in a direction away from the vertical axis 11d. By increasing the area of ​​upper rail horizontal surfaces 11c, 11c, upper rail plate 11A becomes less likely to slip out of first groove opening 14e of guide member 13, and becomes able to withstand a large force.

[0017] The upper rail horizontal surfaces 11c, 11c are formed horizontally and continuously from the other ends of the upper rail side surfaces 11b, 11b. The upper rail horizontal surfaces 11c, 11c abut against the first horizontal abutment surfaces 14c, 14c formed in the first groove portion 14 of the guide member 13. The abutment of the first horizontal abutment surfaces 14c, 14c against the upper rail horizontal surfaces 11c, 11c holds the guide member 13 with the upper rail plate 11A attached to the cross beam 130. The upper rail horizontal surfaces 11c, 11c are preferably sized so that they do not slip out of the first groove opening 14e of the guide member 13 when the upper structure 100 tilts within 5 degrees from the reference vertical position due to an earthquake or other event. The abutment of the upper rail horizontal surfaces 11c, 11c and the first horizontal abutment surfaces 14c, 14c of the guide member 13 suppresses upward lift of the upper structure 100.

[0018] The vertical shaft 11d is formed vertically continuous from the upper rail horizontal surfaces 11c, 11c. The vertical shaft 11d is formed along the first groove opening side surface 14d of the guide member 13, with a length that allows it to protrude from the first groove opening 14e. The vertical shaft 11d is formed with a width in the short direction that allows it to protrude from the first groove opening 14e with a gap from the first groove opening side surface 14d of the guide member 13. The vertical shaft 11d is formed integrally and continuous from the upper rail horizontal surfaces 11c, 11c. The vertical shaft bottom surface 11e, which serves as the bottom surface of the vertical shaft 11d, is formed flat. Note that the first groove opening side surfaces 14d, 14d are preferably formed at a distance such that they do not come into contact with the vertical shaft 11d when either side is tilted within a range of 3 degrees from the reference vertical position relative to the guide member 13. The vertical shaft bottom surface 11e is formed with threaded holes at predetermined intervals along the longitudinal direction, into which the girder mounting bolts 12 can be screwed for installation and removal. The vertical shaft bottom surface 11e may have steps at the positions of the screw holes to provide unevenness.

[0019] 4 and 5, lower moving section 16 includes a vertical shaft 16d on which anchor bolts 17 to be attached to the lower structure are installed, and a lower rail plate 16A formed continuously with vertical shaft 16d. In one example, lower moving section 16 has vertical shaft 16d and lower rail plate 16A formed integrally from a metal material. Lower moving section 16 is installed on lower structure 200 with anchor bolts 17 detachably attached and engaged with guide member 13.

[0020] 1 and 4, lower rail plate 16A is engaged with second groove 15 of guide member 13 so as to be movable linearly along second groove 15 of guide member 13. The movement direction of lower rail plate 16A is a direction perpendicular to the movement direction of upper rail plate 11A (the short side direction of upper structure 100). Lower rail plate 16A is attached to lower structure 200 (see FIG. 1) via anchor bolts 17 with lower rail upper surface 16a facing upward. Lower rail plate 16A includes lower rail upper surface 16a, lower rail side surfaces 16b, 16b continuing in the vertical direction from both ends of lower rail upper surface 16a, and lower rail horizontal surfaces 16c, 16c continuing in the horizontal direction from the other ends of lower rail side surfaces 16b, 16b, and is formed so as to continue in the vertical direction from the other ends of lower rail horizontal surfaces 16c, 16c to vertical shaft 16d. Vertical shaft 16d has a plurality of anchor bolts 17 arranged in a row at equal intervals along the longitudinal direction of vertical shaft bottom surface 16e, which is its bottom surface. Anchor bolts 17 are detachably attached to vertical shaft bottom surface 16e via couplers 18 and coupler mounting bolts 19.

[0021] As shown in Figures 4 and 5, the lower rail plate 16A has a shape with peaks and / or curved portions along its length. For example, the lower rail top surface 16a is formed as a curved portion. The lower rail plate 16A has a shape with the curved lower rail top surface 16a along its length, two peaks at the corners where the lower rail top surface 16a intersects with the lower rail side surfaces 16b, 16b, and two peaks at the corners where the lower rail side surfaces 16b, 16b intersect with the lower rail horizontal surfaces 16c, 16c. In other words, the lower rail plate 16A has a cross-sectional shape with one curved portion and four peaks. The lower rail plate 16A is formed, for example, in the same cross-sectional shape as the upper rail plate 11A. Lower rail upper surface 16a is a portion that moves along second guide upper surface 15a of guide member 13. Lower rail upper surface 16a is formed, for example, as a curved surface portion having an arc-shaped cross section. Lower rail upper surface 16a is formed in a cylindrical shape so that the cross section has an arc-shaped shape that continues in the longitudinal direction.

[0022] Lower rail side surfaces 16b, 16b are formed on both sides of lower rail upper surface 16a, continuing from both ends of lower rail upper surface 16a in the vertical direction. Lower rail side surfaces 16b, 16b are formed to a length such that the thickness from lower rail upper surface 16a to lower rail horizontal surfaces 16c, 16c is a preset value. Lower rail side surfaces 16b, 16b are formed to be vertical, for example, but may also be inclined, for example, by inclining toward vertical axis 16d or inclining away from vertical axis 16d. Note that lower rail side surfaces 16b, 16b may be inclined in a direction away from vertical axis 16d to increase the area of ​​lower rail horizontal surfaces 16c, 16c without changing the short-side length of lower rail upper surface 16a. By increasing the area of ​​lower rail horizontal surfaces 16c, 16c, lower rail plate 16A becomes less likely to slip out of second groove opening 15e of guide member 13, and is able to withstand a large force.

[0023] The lower rail horizontal surfaces 16c, 16c are formed horizontally and continuously from the other ends of the lower rail side surfaces 16b, 16b. The lower rail horizontal surfaces 16c, 16c are portions that abut against the second horizontal abutment surfaces 15c, 15c formed in the second groove portion 15 of the guide member 13. The lower rail horizontal surfaces 16c, 16c face the second horizontal abutment surfaces 15c, 15c with a gap between them. This is because the upper rail plate 11A holds the guide member 13 when the upper moving unit 11 is attached to the cross beam 130. Therefore, the lower rail plate 16A is inserted into and engaged with the second groove portion 15 of the guide member 13 with a gap between them without contacting the inside of the second groove portion 15 of the guide member 13. The lower rail horizontal surfaces 16c, 16c are preferably sized so that they will not slip out of the second groove opening 15e of the guide member 13 when the upper structure 100 tilts within a range of 5 degrees from the reference vertical position due to an earthquake or the like. Furthermore, the lower rail horizontal surfaces 16c, 16c abut against the second horizontal abutment surfaces 15c, 15c of the guide member 13, thereby suppressing the upward lift of the upper structure 100.

[0024] As shown in FIG. 6, vertical shaft 16d is formed continuously in the vertical direction from lower rail horizontal surfaces 16c, 16c. Vertical shaft 16d is formed to a length that allows it to protrude from second groove opening 15e along second groove opening side surface 15d of guide member 13. Vertical shaft 16d is formed to a width in the short side direction that allows it to protrude from second groove opening 15e with a gap between it and second groove opening side surface 15d of guide member 13. Vertical shaft 16d is formed integrally and continuously from lower rail horizontal surfaces 16c, 16c. Vertical shaft bottom surface 16e, which serves as the bottom surface of vertical shaft 16d, is formed flat. 5 and 6, through holes that penetrate to the lower rail upper surface 16a are formed in the vertical shaft bottom surface 16e at predetermined intervals along the longitudinal direction. Coupler mounting bolts 19 are inserted into the through holes. The coupler mounting bolts 19 are adapted to be detachably attached to couplers 18 that abut against the vertical shaft bottom surface 16e. The through holes 20 are formed with a step that allows the lower surfaces of the bolt heads of the coupler mounting bolts 19 to abut against them and allow the bolt portion to be inserted.

[0025] As shown in Figures 3 to 5, the guide member 13 engages the upper moving part 11 so as to be movable (slidable) in the lateral direction of the upper structure 100, which is the linear direction, and engages the lower moving part 16 so as to be movable (slidable) in the longitudinal direction of the upper structure 100, which is the orthogonal direction perpendicular to the linear direction. The guide member 13 has a first groove 14 that engages the upper moving part 11 so as to be movable in the linear direction, and a second groove 15 that engages the lower moving part 16 so as to be movable in the orthogonal direction perpendicular to the linear direction. As an example, the guide member 13 is formed so that the first groove 14 is formed on the upper stage side and the second groove 15 is formed on the lower stage side. The guide member 13 has a rectangular parallelepiped appearance with the first groove 14 and second groove 15 formed therein.

[0026] 4 and 5, the first groove portion 14 has, as an example, a groove shape similar to the cross-sectional shape perpendicular to the longitudinal direction of the upper moving portion 11. The first groove portion 14 has a first guide bottom surface 14a, first guide side surfaces 14b, 14b continuous with the first guide bottom surface 14a, first horizontal abutment surfaces 14c, 14c continuous with the first guide side surfaces 14b, 14b, first groove opening side surfaces 14d, 14d continuous with the first horizontal abutment surfaces 14c, 14c, and a first groove opening 14e formed at the opening interval between the first groove opening side surfaces 14d, 14d.

[0027] The first guide bottom surface 14a faces the upper rail upper surface 11a of the upper rail plate 11A, and is formed, for example, in an arc shape so that the cross-sectional shape is similar to that of the upper rail upper surface 11a. The first guide side surfaces 14b are formed vertically from both ends of the first guide bottom surface 14a. The first guide side surfaces 14b face the upper rail side surfaces 11b of the upper rail plate 11A, and are formed vertically so as to have a shape similar to that of the upper rail side surfaces 11b, for example.

[0028] The first horizontal abutment surfaces 14c are formed continuously in the horizontal direction from the other end of the first guide side surface 14b. The first horizontal abutment surfaces 14c are disposed in positions where at least a portion of each of the first horizontal abutment surfaces 14c faces the upper rail horizontal surfaces 11c of the upper rail plate 11A. The abutment between the first horizontal abutment surfaces 14c and the upper rail horizontal surfaces 11c inhibits the upper moving part 11 from moving upward. The first groove opening side surfaces 14d, 14d are formed as vertical surfaces continuing from the other ends of the first horizontal abutment surfaces 14c, 14c. The first groove opening side surfaces 14d, 14d are formed in positions facing the vertical axis 11d of the upper rail plate 11A and spaced apart from the vertical axis 11d. The distance between the first groove opening side surfaces 14d, 14d, i.e., the first groove opening 14e, is narrower than the distance between one upper rail side surface 11b and the other upper rail side surface 11b, and does not contact the vertical axis 11d.

[0029] The first groove 14 has the same shape and opening width as the second groove 15. Therefore, as shown in FIGS. 7A and 7B, when the guide member 13 is tilted within 3 degrees from the reference vertical position, the upper rail upper surface 11a or any of the four peaks of the upper rail plate 11A does not contact the inner surface of the first groove 14. Alternatively, even if any one point (upper rail upper surface 11a in the figure) contacts any of the inner surfaces of the first groove 14, the other four peaks or the upper rail upper surface 11a do not contact the inner surface of the first groove 14. The first groove 14 has an inner surface shape such that, while a portion of the upper rail upper surface 11a contacts the inner surface of the first groove 14, the other four peaks do not contact the inner surface of the first groove 14. Incidentally, the inner surface shape of the first groove portion 14 is similar to that of the upper rail plate 11A, and is formed to have a size that leaves approximately equal intervals between each opposing position of the upper rail plate 11A.

[0030] 5, for example, the second groove portion 15 has a groove shape similar to the cross-sectional shape perpendicular to the longitudinal direction of the lower moving portion 16. Also, for example, the second groove portion 15 is formed in the same shape as the first groove portion 14. The second groove portion 15 has a second guide upper surface 15a, second guide side surfaces 15b, 15b continuing with the second guide upper surface 15a, second horizontal abutment surfaces 15c, 15c continuing with the second guide side surfaces 15b, 15b, second groove opening side surfaces 15d, 15d continuing with the second horizontal abutment surfaces 15c, 15c, and a second groove opening 15e formed at the opening interval between the second groove opening side surfaces 15d, 15d.

[0031] The second guide upper surface 15a faces the lower rail upper surface 16a of the lower rail plate 16A, and is formed, for example, in an arc shape similar to the lower rail upper surface 16a. The second guide side surfaces 15b are formed vertically from both ends of the second guide upper surface 15a. The second guide side surfaces 15b face the lower rail side surfaces 16b of the lower rail plate 16A, and are formed vertically so as to have a shape similar to the lower rail side surfaces 16b, for example.

[0032] The second horizontal abutment surfaces 15c, 15c are formed horizontally continuously from the other end of the second guide side surface 15b, 15b. The second horizontal abutment surfaces 15c, 15c are disposed in positions where at least a portion thereof faces the lower rail horizontal surfaces 16c, 16c of the lower rail plate 16A. The second horizontal abutment surfaces 15c, 15c abut against the lower rail horizontal surfaces 16c, 16c, thereby suppressing upward movement of the guide member 13.

[0033] Second groove opening side surfaces 15d, 15d are formed as vertical surfaces continuing from the other ends of second horizontal abutment surfaces 15c, 15c. Second groove opening side surfaces 15d, 15d are formed in positions facing vertical shaft 16d of lower rail plate 16A so as to face and be spaced apart from vertical shaft 16d. The distance between second groove opening side surfaces 15d, 15d, i.e., second groove opening 15e, is formed at a distance that does not contact vertical shaft 16d and is narrower than the distance between one lower rail side surface 16b and the other lower rail side surface 16b.

[0034] The shape and width of the second groove 15 are the same as those of the first groove 14. As shown in FIGS. 7A and 7B , when the guide member 13 is tilted at an angle of 3 degrees or less from the reference vertical position, the second groove 15 is shaped or sized such that, even if the lower rail upper surface 16a of the lower rail plate 16A or one of its four peaks (a part of the lower rail upper surface 16a in the figure) contacts one of the inner surfaces of the second groove 15, none of the other four peaks or the lower rail upper surface 16a contacts the inner surface of the second groove 15. For example, the second groove 15 has an inner surface shape such that, when a part of the lower rail upper surface 16a contacts the inner surface of the second groove 15, the other four peaks do not contact the inner surface of the second groove 15.

[0035] The inner surface of second groove 15 has a shape similar to that of lower rail plate 16A, and is sized to provide a substantially uniform gap between the opposing positions of lower rail plate 16A. Second groove opening side surfaces 15d, 15d are preferably spaced apart so that guide member 13 does not contact vertical axis 16d when tilted within a 3-degree range from the reference vertical position. Even when guide member 13 is tilted at an angle of 3 degrees or less from the reference vertical position, the groove shape is required to ensure that lower rail plate 16A does not contact second groove 15 or only contacts a single point. While the tilt angle is set to 3 degrees or less, 3.5 degrees or less is preferred, 4 degrees or less is even more preferred, and 5 degrees or less is even more preferred. In other words, the shape and size of first groove 14 are preferably such that upper rail plate 11A can move linearly even when guide member 13 tilts together with upper rail plate 11A, and the shape and size of second groove 15 are preferably such that lower rail plate 16A can move perpendicularly.

[0036] The upward lift-force suppression device 10 having the above-described configuration can arrange the girder mounting bolts 12 or anchor bolts 17 in a single row on each of the upper rail plate 11A and the lower rail plate 16A, thereby reducing the number of parts and the labor required for installation compared to conventional configurations. Furthermore, when an earthquake occurs and a structure 300 such as a road bridge sways, the support 50 of the upward lift-force suppression device 10 acts to suppress the swaying of the upper structure 100, and the upward lift-force suppression device 10 suppresses the upward lift of the upper structure 100. In the upward lift-force suppression device 10, the upper moving part (upper rail plate 11A) 11 and the lower moving part (lower rail plate 16A) 16, which are engaged with the first groove 14 and the second groove 15 of the guide member 13, can move in response to the swaying. This is because, as shown in Figures 7A and 7B, the groove opening shape of the second groove portion 15, or the first groove portion 14 and the second groove portion 15, is formed so that even if the guide member 13 is tilted within 3 degrees from the reference vertical position, there is no point where the lower rail plate 16A comes into contact with the inside of the groove opening, or the shape is such that the lower rail plate 16A comes into contact with only one point inside the groove opening, so that the frictional force associated with movement is small.

[0037] Furthermore, in the upper lift suppression device 10, the upper rail plate 11A and the lower rail plate 16A move to suppress the upward movement of the upper structure 100. When an upward moving lift is applied to the upper moving part 11, which is connected to the upper structure 100 with the girder mounting bolts 12, the upper rail horizontal surfaces 11c, 11c come into contact with the first horizontal abutment surfaces 14c, 14c of the guide member 13. When an upward moving lift is applied to the guide member 13, the second horizontal abutment surfaces 15c, 15c of the guide member 13 come into contact with the lower rail horizontal surfaces 16c, 16c of the lower rail plate 16A.

[0038] Therefore, because the lower moving part 16 is connected to the lower structure 200 by the anchor bolts 17, it can withstand the upward moving lift. Furthermore, when a downward moving force is applied, part or all of the upper rail upper surface 11a comes into contact with the first guide bottom surface 14a of the guide member 13, and a force is applied that moves the guide member 13 downward. When a force is applied to the guide member 13, the lower rail upper surface 16a comes into contact with part or all of the second guide upper surface 15a. Furthermore, because the lower moving part 16 is connected to the lower structure 200 via the anchor bolts 17, it can withstand the force applied downward.

[0039] As described above, in an earthquake, forces are applied in the vertical direction, as well as left-right or front-to-rear directions, but the upper moving part 11 of the upper lift suppression device 10 can move in the vertical direction via the first groove 14 of the guide member 13, and the lower moving part 16 can move in the horizontal direction via the second groove 15 of the guide member 13. Therefore, even if the upper structure 100 sways forward, backward, left, and right and also up and down, the forces related to the vertical movement can be suppressed as the upper structure 100 sways forward, backward, left, and right. In particular, the upper lift suppression device 10 can follow the upper structure 100 as it sways forward, backward, left, and right, and can suppress the lift moving above the upper structure 100.

[0040] In the upper lift force suppression device 10, when an earthquake causes a downward force to act on the upper structure 100, the upper rail upper surface 11a of the upper moving part 11 and the first guide bottom surface 14a of the guide member 13, and the lower rail upper surface 16a of the lower moving part 16 and the second guide upper surface 15a of the guide member 13 can each withstand the downward force. Therefore, even if, for example, one or both of the support parts 50, 50 are damaged, the upper lift force suppression device 10 can fulfill the role of a step prevention function that supports the upper structure 100 at an appropriate height, preventing steps from occurring on the road surface.

[0041] Next, an installation method S10 for an upper lift force suppression device will be described with reference to Fig. 8. As shown in Fig. 8, the installation method S10 for an upper lift force suppression device includes, in this order, a lower rail plate installation step S11, a guide member arrangement step S12, an upper rail plate arrangement step S13, and an installation step S14. The lower rail plate attachment step S11 is a step of attaching the lower rail plate 16A to the anchor bolts 17 provided on the lower structure 200 via the couplers 18 and coupler attachment bolts 19. In this step S11, the couplers 18 are attached to the anchor bolts 17. Then, with the through holes 20 of the lower rail plate 16A aligned with the couplers 18, the coupler attachment bolts 19 are inserted into the through holes 20 to engage the couplers 18. By engaging the coupler attachment bolts 19, the lower rail plate 16A is positioned on the anchor bolts.

[0042] The guide member placement step S12 is a step of placing the guide member 13, which has a first groove portion 14 on its upper side and a second groove portion 15 below the first groove portion 14 in a direction perpendicular to the first groove portion 14, by inserting the lower rail plate 16A into the second groove portion 15. In other words, step S12 is a step of placing the guide member 13 by inserting the lower rail plate 16A into the second groove portion 15. In step S12, the guide member 13 is placed in the center position in the longitudinal direction of the lower rail plate 16A with the second groove portion 15 of the guide member 13 facing the end of the lower rail plate 16A.

[0043] The upper rail plate placement step S13 is a step of placing the upper rail plate 11A by inserting the upper rail plate 11A, which has a plurality of girder mounting bolts 12 spaced apart in the longitudinal direction, into the first grooves 14 of the guide member 13 in a direction perpendicular to the lower rail plate 16A. That is, step S13 is a step of inserting and placing the upper rail plate 11A into the first grooves 14 of the guide member 13. In step S13, by inserting the upper rail plate 11A along the first grooves of the guide member 13, the guide member 13 is placed so that it is centered in the longitudinal direction of the upper rail plate 11A in the direction perpendicular to the lower rail plate 16A.

[0044] The installation step S14 is a step of attaching the girder mounting bolts 12 of the upper rail plate 11A to the cross beam 130, which is a girder member of the upper structure 100. In this step S14, the installation of the girder mounting bolts 12 causes the upper rail horizontal surface 11c of the upper rail plate 11A to abut against the first horizontal abutment surface 14c of the guide member 13, thereby suspending the guide member 13 from the upper rail plate 11A. When the guide member 13 is suspended from the upper rail plate 11A, the lower rail plate 16A is positioned in a state where it does not contact the second groove portion 15 of the guide member 13.

[0045] By attaching the girder mounting bolts 12 of the upper rail plate 11A to the cross beam 130, which is a girder member of the upper structure 100, the upper lift force suppression device 10 can be attached between the upper structure 100 and the lower structure 200. When the upper lift force suppression device 10 is attached, the upper structure 100 is supported by the supports 50, 50.

[0046] Furthermore, because the lower moving part 16 of the upper lift force suppression device 10 is connected to the anchor bolt 17 via the coupler 18 and the coupler mounting bolt 19, it can be replaced with a new one if it deteriorates over time or is damaged. That is, first, the girder mounting bolt 12 of the upper lift force suppression device 10 is removed from the cross beam 130 (Step 1). Next, the upper rail plate 11A is slid out of the first groove 14 of the guide member 13 to remove it (Step 2). Furthermore, the guide member 13 is slid along the lower rail plate 16A to remove the guide member 13 (Step 3). Next, the coupler mounting bolt 19 attached to the lower rail plate 16A is removed (Step 4). Then, the lower rail plate 16A is removed from the anchor bolt 17 (Step 5), allowing the upper lift force suppression device 10 to be removed from the structure 300.

[0047] Next, an upper lift suppression device 10B according to a second embodiment will be described with reference to Figures 9A to 9D. The upper lift suppression device 10B differs from the upper lift suppression device 10 only in the groove shapes of the first and second grooves and the cross-sectional shapes of the upper and lower rail plates. The remaining configurations, procedures, or steps are the same as those of the first embodiment. Therefore, only the different configurations will be described, and the same configurations, procedures, or steps as those of the first embodiment will be omitted. Furthermore, the symbols used in the first embodiment, such as those suffixed with "a" in the first embodiment, "b1" in the second embodiment, "b2" in the third embodiment, "c" in the third embodiment, and so on, indicate the same positions.

[0048] As shown in Figures 9A and 9B, the upper rail plate 11B1 of the upper lift force suppression device 10B has an upper rail upper surface 11b1 of the upper rail plate 11B1 and a lower rail upper surface 16b1 of the lower rail plate 16B1 that are flat along the longitudinal direction. The upper rail upper surface 11b1 and the upper rail side surfaces 11b2, 11b2 at both ends of the upper rail plate 11B1 have arc-shaped curved surface portions 11ba, 11ba at their apexes. The first guide bottom surface 14a and the second guide upper surface 15a of the guide member 13B are flat. The remaining configuration is the same as that of the first embodiment. The upper rail plate 11B1 has two curved surface portions 11ba, 11ba and two apexes in its cross-sectional shape. Furthermore, the lower rail plate 16B1 has the same shape as the upper rail plate 11B1, and thus similarly includes two curved surface portions 16ba, 16ba and two apexes.

[0049] In the upper lift suppression device 10B, as shown in FIGS. 9C and 9D , when the upper moving part 11B and the guide member 13B attached to the upper structure 100 tilt within 3 degrees from the reference vertical position due to shaking such as an earthquake, a portion of the lower rail upper surface 16b1 of the lower rail plate 16B1 comes into contact with the second guide upper surface 15b1 of the guide member 13B. Therefore, the lower rail plate 16B1 can move within the second groove portion 15B of the guide member 13B without significant frictional interference. In the upper lift suppression device 10B, when the inclination angle of the guide member 13B is small, i.e., 3 degrees or less, the curved surface portion 11ba does not come into contact with the second guide upper surface 15b1. Therefore, the lower rail plate 16B1 can move within the second groove portion 15B of the guide member 13B without increasing frictional resistance.

[0050] Next, an upper lift force suppression device 10C of a third embodiment will be described with reference to Figures 10A to 10D. Note that the upper lift force suppression device 10C uses the guide member 13B described in the second embodiment. The upper lift force suppression device 10C differs from the second embodiment in that the upper rail upper surface 11c1 of the upper rail plate 11C1 is flat, and the lower rail upper surface 16c1 of the lower rail plate 16C1 is flat. Furthermore, the upper rail plate 11C1 and the lower rail plate 16C1 each have four vertices in a cross section perpendicular to the longitudinal direction.

[0051] Therefore, when guide member 13B is tilted within a range of 3 degrees from the reference vertical position, as shown in FIG. 9C, a portion of lower rail upper surface 16c1 contacts second guide upper surface 15b1 of second groove 15B. Alternatively, the apex where lower rail upper surface 16c1 and lower rail side surface 16c2 connect is in contact with second guide upper surface 15b1. Second groove 15B is formed to have a shape similar to that of lower rail plate 16C1 so that the remaining portion of lower rail plate 16C1 does not contact the inner surface of second groove 15B, except for the portion in contact with second guide upper surface 15b1. Here, lower rail plate 16C1 is inserted into second groove 15B so that each face of lower rail plate 16C1 is spaced the same distance apart from the inner surface of second groove 15B. Furthermore, when the inclination angle of the guide member 13B and the upper rail plate 11C1 is small, the lower rail plate 16C1 does not come into contact with any part of the inner surface of the second groove portion 15B, and the inner surface shape of the second groove portion is formed to allow smooth movement.

[0052] Next, modified examples of the lower rail plate and modified examples of the guide member will be described with reference to Figures 11 and 12. Note that the guide member 13 in Figure 11 has the same configuration as that described in the first embodiment, and therefore its description will be omitted. Furthermore, the anchor bolts and couplers are also omitted. Also, Figure 12 shows and describes the shape of the second groove portion 15E of the guide member 13E, but the first groove portion 14E also has the same shape, and therefore its description will be omitted. 11, lower rail plate 16D1 has lower rail top surface 16d1 formed as an arc-shaped curved surface portion, and lower rail side surfaces 16d2, 16d2 also formed as arc-shaped curved surfaces with different curvatures.

[0053] The lower rail horizontal surfaces 16d3, 16d3 are flat so that they can abut against the second horizontal abutment surfaces 15c, 15c of the second groove 15. The lower rail plate 16D1 has four corners 16da, 16da, 16db, 16db, all of which are arc-shaped and do not have sharp peaks. The lower rail side surfaces 16d2, 16d2 are also curved. Therefore, when the guide member 13 is tilted within 3 degrees from the reference vertical position, some of the arc-shaped portions of the lower rail plate 16D1 come into contact with the inner surface of the second groove 15. Depending on the tilt angle within 3 degrees, there may be fewer contact points or no contact at all. Therefore, the frictional force is smaller than when two or more portions of the lower rail plate 16D1 contact the inner surface of the second groove 15. Therefore, even if guide member 13 is shaken by an earthquake or the like and tilts within a range of 3 degrees from the reference vertical position, lower rail plate 16D1 can move relative to second groove portion 15 of guide member 13 in response to the shaking of the earthquake, and the upward lift force that moves upper structure 100 upward can be suppressed at an appropriate position. Note that the upper rail plate may have the same shape as lower rail plate 16D1 or may have the configuration shown in the other embodiments.

[0054] As shown in FIG. 12, the second groove 15E of the guide member 13E is formed so that the second guide upper surface 15e1 is an arc-shaped curved surface. The second guide side surface 15e2 is formed so that it is an arc-shaped curved surface with a different curvature from the second guide upper surface 15e1. The second guide abutment surfaces 15e3, 15e3 are formed so as to be horizontal from the other end of the second guide side surfaces 15e2, 15e2. The second guide abutment surface 15e3 is formed flat so as to be in surface contact with the horizontal surface of the lower rail of the lower rail plate (see FIGS. 11, 3, etc.). The second groove 15E is formed as a curved surface except for the second guide abutment surfaces 15e3, 15e3, so that the lower rail plate can slide smoothly even if it comes into contact with a portion of the lower rail plate.

[0055] For example, when this guide member 13E is used in conjunction with the lower rail plate 16C1 according to the third embodiment, if the guide member 13E is tilted within a range of 3 degrees from the reference vertical position, one apex of the lower rail plate 16C1 will contact the curved surface portion that forms the inner surface of the second groove 15E, or, depending on the tilt angle, will not contact the curved surface portion at all. Therefore, even if the guide member 13E is tilted due to shaking caused by an earthquake or the like, the lower rail plate 16D1 can move, with little frictional resistance. Even if the shape of the lower rail plate 16D1 shown in FIG. 11 is similar to that of the second groove 15E, a portion of the curved surface portion will contact a portion of the inner surface of the second groove 15E, allowing the lower rail plate 16D1 to move due to shaking caused by an earthquake.

[0056] As described above, the upper lift suppression device, which has the configuration of any of the embodiments and modifications, or a combination of the embodiments and modifications, has fewer parts than conventional devices and simplifies installation procedures. Furthermore, even if an earthquake or other tremor causes the upper structure 100 to sway back and forth, left and right, and up and down, generating lift that would move the upper structure upward, the upper rail panel and lower rail panel slide in response to the tremor, resisting and suppressing the upward lift of the upper structure. Furthermore, the upper lift suppression device allows the upper rail panel, guide member, and lower rail panel to absorb vertical forces through the first and second horizontal abutment surfaces of the guide member. Therefore, even if the support members 50, 50 are damaged, the upper lift suppression device still fulfills its role of preventing unevenness by supporting the upper structure 100 at an appropriate height, preventing unevenness from occurring on the road surface.

[0057] Although the upper rail plate has been described as having a vertical axis, it may have a flat bottom surface that is continuous with the horizontal surface of the upper rail without having a vertical axis. Therefore, the base end of the girder mounting bolt may be positioned so as to face the side surface of the first groove opening. Although the lower rail plate has been described as having a vertical axis, it may have a flat bottom surface that is continuous with the horizontal surface of the lower rail without having a vertical axis. Therefore, the coupler 18 may be installed so as to face the side surface of the second groove opening of the guide member. Furthermore, although the upper rail plate has been described as being longer than the lower rail plate, it may be shorter, or the two may be the same in length. Furthermore, although the upper rail plate has been described as being arranged along the short side of the upper structure and the lower rail plate has been described as being arranged along the long side of the upper structure, it may be arranged so that the upper rail plate is arranged along the long side of the upper structure and the lower rail plate is arranged along the short side of the upper structure. [Explanation of symbols]

[0058] 10 Upper lift suppression device 11 Upper moving part 11A Upper rail plate 11a Top surface of upper rail 11b Upper rail side 11c Upper rail horizontal surface 11d vertical axis 11e Vertical axis bottom 12-digit mounting bolt (bolt) 13 Guide member 14 First groove 14a Bottom of the first guide 14b First guide side 14c 1st horizontal contact surface 14d 1st groove opening side 14e 1st groove opening 15 Second groove 15a Second guide top surface 15b Second guide side 15c 2nd horizontal contact surface 15d 2nd groove opening side 15e 2nd groove opening 16 Lower moving part 16A Lower Rail Plate 16a Upper surface of lower rail 16b Lower rail side 16c Lower rail horizontal surface 16d Drooping axis 16e Bottom of hanging shaft 17 Anchor bolt (bolt) 18 Coupler 19 Coupler mounting bolt 20 through holes 50, 50A, 50B bearing part 300 Concrete Structures (Structures) 100 Superstructure 110 Bridge Girder 120 Floor plate support 130 Crossbeam 200 Substructure (pier) S11 Area setting process S12 Cutting process S13 Primer application process S14 Filling process S10 Installation method of upward lift suppression device

Claims

1. An upper lift suppression device disposed with a bearing between an upper structure and a lower structure, an upper rail plate connected to the upper structure via a girder mounting bolt; a lower rail plate connected to the lower structure via anchor bolts; An upper lift suppression device comprising: a guide member having a first groove portion that engages the upper rail plate so that it can be moved freely in a linear direction, and a second groove portion that engages the lower rail plate so that it can be moved freely in a perpendicular direction perpendicular to the linear direction.

2. the upper rail plate has an upper rail horizontal surface on its lower surface, the guide member has a first horizontal abutment surface facing the upper rail horizontal surface, the first horizontal abutment surface being continuous with a first groove opening of the first groove portion; the lower rail plate has a lower rail horizontal surface on its lower surface, The upward lift suppression device according to claim 1 , wherein the guide member has a second horizontal abutment surface that faces the lower rail horizontal surface and is continuous with the second groove opening of the second groove portion.

3. the lower rail plate has a shape with a peak and / or a curved surface along the longitudinal direction; The upper lift suppression device described in claim 1, wherein the cross-sectional shape of the second groove portion of the guide member is formed so that it does not contact the second groove portion for an inclination of within 3 degrees from the installed reference vertical position, or so that the apex or curved portion that contacts the second groove portion is at one point.

4. the lower rail plate has a shape having a curved surface portion along a longitudinal direction at a position facing an upper surface and / or a side surface of the second groove portion of the guide member, The upward lift suppression device according to claim 1 , wherein the guide member has the second groove portion having a cross-sectional shape similar to that of the lower rail plate having the curved surface portion.

5. the lower rail plate has a cross-sectional shape perpendicular to the longitudinal direction, in which curved portions are provided between the upper surface and one side surface of the guide member and between the upper surface and the other side surface of the guide member, or the cross-sectional shape is rectangular; The upward lift suppression device according to claim 1 , wherein the second groove portion of the guide member has a cross-sectional shape that is rectangular or similar to that of the lower rail plate having the curved portion.

6. the upper rail plate has a top and / or curved surface that is the same shape as the top and / or curved surface of the lower rail plate at a position along the longitudinal direction that faces the top and / or side of the first groove portion of the guide member, The upper lift suppression device described in claim 3, wherein the cross-sectional shape of the first groove portion of the guide member is formed so that it does not contact the first groove portion for an inclination of within 3 degrees from the installed reference vertical position, or so that the apex or curved portion that contacts the first groove portion is at one point.

7. the upper rail plate and the lower rail plate have a shape with a peak and / or a curved surface along the longitudinal direction; The upper lift suppression device according to claim 1, wherein the guide member has the first groove portion and the second groove portion having a cross-sectional shape similar to the upper rail plate and the lower rail plate having the top and / or the curved surface portion.

8. 2. The upward lift suppression device of claim 1, wherein the lower rail plate includes a coupler that is detachably connected to one end of the anchor bolt and that is positioned on the bottom surface of the lower rail plate, and a coupler mounting bolt that is detachably connected to the coupler and that is inserted through a through hole that penetrates from the bottom surface of the lower rail plate to the upper surface of the lower rail of the lower rail plate.

9. the upper rail plate is disposed along a short-side direction of the upper structure, The upper lift suppression device according to claim 1 , wherein the lower rail plate is shorter in dimension than the upper rail plate.

10. A structure equipped with the upward lift suppression device according to any one of claims 1 to 9, A structure in which the upward lift suppression device is installed together with a support part between the upper structure and the lower structure.

11. A method for installing an upward lift suppression device installed between an upper structure and a lower structure, comprising: attaching the lower rail plate to anchor bolts provided on the lower structure via couplers and coupler attachment bolts; a step of arranging a guide member having a first groove portion on an upper side and a second groove portion on a lower side of the first groove portion in a direction perpendicular to the first groove portion by inserting the lower rail plate into the second groove portion; positioning an upper rail plate having a plurality of longitudinally spaced girder mounting bolts inserted into the first groove of the guide member in a direction perpendicular to the lower rail plate; an installation step of attaching the girder mounting bolts of the upper rail plate to the girder members of the upper structure.

Images