JP3848859B2 - Orbital girder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention particularly relates to the support of a track girder on which a straddle-type monorail travels.
[0002]
[Prior art]
For example, the track of a straddle-type monorail is configured by connecting track girders having a length of about 20 m. Each track girder is installed between piers. A bearing is one that fixes the end of the track girder to the pier. The bearing includes a fixed bearing and a movable bearing. One end of the track girder is supported by the fixed bearing and the other end is supported by the movable bearing.
[0003]
Conventionally, a pin type is provided as a fixed bearing, and a roller type is provided as a movable bearing.
[0004]
The fixed bearing is composed of an upper bearing and a lower bearing, both of which are fastened by two pins so that the track girder can be rotated in a vertical plane.
[0005]
The movable bearing is also composed of an upper bearing and a lower bearing, and is provided with two rollers. The track girder can be rotated in a vertical plane and can be moved in the axial direction. With such a structure, the structure can cope with the overturning moment, vertical load, and horizontal load of the girder.
[0006]
The track girder is supported by four points (two pins and two rollers).
[0007]
[Problems to be solved by the invention]
In the above-mentioned support, a gap is provided between the pin or roller and the support structure main body so as to be movable. Therefore, when one of the gaps is expanded in the vertical direction due to aged wear, There was a problem that the track girder was rolling because it became a three-point support state.
[0008]
Further, since the pin or roller is a constituent element, the structure is complicated and the price is expensive.
[0009]
An object of the present invention is to provide a support capable of preventing the three-point support state and reducing the cost.
[0010]
[Means for Solving the Problems]
There is a pedestal on the bridge pier , and on this pedestal , a liner , laminated rubber , a spherical seat with a spherical upper surface, and a support collar are sequentially placed.
This set is on both sides in the width direction of the starting beam at both ends in the longitudinal direction of the track beam ,
The orbital girder is placed on the bearing,
In the longitudinal direction of the track girder, there are the fixed seat to the position of the front and rear of each of said sets of said liner,
The fixed seat is fixed to the pedestal by welding,
Fastening both ends of the presser foot placed on the bar along the longitudinal direction of the track girder to the fixed seat with bolts and nuts;
Can be achieved.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
A support according to an embodiment of the present invention will be described with reference to FIGS. 1 is a cross-sectional view taken along line IA-IB-IC-ID in FIG.
[0012]
The end of the track girder 10 on which the straddle-type monorail vehicle 9 travels is fixed to the pier 20 via a support 30. Since the track girder 10 is made of concrete, an iron pedestal 15 is fixed to the frame surface. Since the pier 20 is made of concrete, an iron pedestal 21 is fixed on the upper surface.
[0013]
On the upper surface of the pedestal 21, liners 40 and 40, laminated rubber 43 and 43, spherical seats 45 and 45 having a spherical upper surface, and flanges 31 and 31 of the support 30 are sequentially placed. The bearing 30 carries the track girder 10 via the pedestal 15.
[0014]
The liner 40, the laminated rubber 43, and the spherical seat 45 are circular when viewed from above. These groups are present at two locations in the width direction of the orbital beam 10 (direction orthogonal to the longitudinal direction of the beam). These sets are outside the side surface of the track girder 10. The upper surface of the spherical seat 45 has an upward convex spherical shape. The radius of the sphere is large. The spherical seat 45 is made of iron. The bottom surface of the collar 31 is recessed in a spherical shape. The radius of the spherical surface of the recess is larger than the radius of the upper surface of the spherical seat 45. A laminated rubber 43 is integrally provided on the lower surface of the spherical seat 45.
[0015]
In the longitudinal direction of the track girder 10, fixing seats 25 are fixed to the base 21 by welding on both sides of each liner 40. The fixed seat 25 has a space in which the nut at the lower end of the bolt 55 can be fastened. The presser foot 50 is placed on the upper surface of the collar 31, and both ends of the presser foot 50 are fastened to the fixing seats 25, 25 with bolts and nuts 55. As a result, the collar 31 is fixed to the base 21. The presser foot 50 is along the longitudinal direction of the track girder 10. The presser foot 50 is on both sides of the track girder 10.
[0016]
The convex portion 35 on the upper surface of the support 30 is inserted into the hole of the base 15 and positioned. A pillar 60 installed on the pedestal 25 is inserted into a hole in the lower surface of the support 30 and positioned. There is an appropriate gap between the pillar 60 and the hole for inserting it. In particular, there is a gap in the longitudinal direction of the track girder 10. The pillar 60 and the hole for inserting the pillar 60 have a quadrangular horizontal cross section.
[0017]
According to this configuration, when the expansion and contraction of the track girder 10 occurs due to a temperature difference or monorail travel, the expansion and contraction is allowed by the shear deformation of the laminated rubber 40, the gap between the pillar 60 and its hole, and the like. Further, the rotation of the track girder 10 in the vertical plane is made possible by the deformation (mainly compression bias deformation) of the laminated rubber 43. The movement in the width direction of the track girder 10 is restricted by the pillar 60 and its hole. The lifting force of the track girder 10 is prevented by the bolt 55.
[0018]
As described above, movement can be allowed and positioning can be achieved. According to this, since no pin or roller is used as in the prior art, it is possible to prevent the track beam 10 from being in a three-point supported state. As a result, rolling of the track girder 10 can be prevented and the safety of the monorail vehicle can be improved.
[0019]
In addition, the configuration can be simplified as described above, and the cost can be reduced. Conventionally, one end of the track girder 10 is a fixed bearing and the other end is a movable bearing. However, according to the steam configuration, only one type of bearing 30 is sufficient. As a result, the production cost can be reduced.
[0020]
In addition, although the said Example supported the track | girder beam which a straddle-type monorail vehicle drive | works, this invention is not limited to it, For example, it applies also to the track | girder beam which another transportation means drive | works. be able to.
[0021]
The pier 20 includes a foundation structure such as an abutment. Further, the support 30 can be installed at the center of the track girder 10 or the like.
[0022]
【The invention's effect】
According to the present invention, it is possible to prevent the girders from being in a three-point support state with a simple configuration.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view of a support portion according to an embodiment of the present invention.
2 is a plan view of FIG. 1. FIG.
FIG. 3 is a right side view of FIG. 1;
FIG. 4 is a perspective view showing a usage state of a bearing according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Orbital girder, 20 ... Pier, 21 ... Base, 25 ... Fixed seat, 30 ... Bearing, 31 ... Rod, 40 ... Liner, 43 ... Laminated rubber, 45 ... Spherical seat, 50 ... Presser foot, 55 ... Bolt nut, 60 ... pillar.

Claims (1)

There is a pedestal on the bridge pier , and on this pedestal , a liner , laminated rubber , a spherical seat with a spherical upper surface, and a support collar are sequentially placed.
This set is on both sides in the width direction of the starting beam at both ends in the longitudinal direction of the track beam ,
The orbital girder is placed on the bearing,
In the longitudinal direction of the track girder, there are the fixed seat to the position of the front and rear of each of said sets of said liner,
The fixed seat is fixed to the pedestal by welding,
Fastening both ends of the presser foot placed on the bar along the longitudinal direction of the track girder to the fixed seat with bolts and nuts;
Orbital girder characterized by

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