JP2003293315A - Bearing position adjusting method and its adjusting jig - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing position adjusting method facilitating the adjustment in any direction with a simple structure at low cost and its adjusting jig by making use of the existing fixed bolt hole or the like to make it detachable and adjusting a screw amount into a gap between the existing fixed bolt and the end face of a partner member for adjusting a position. <P>SOLUTION: The adjusting jig 8 is fixed to an upper shoe member 3 fixed to a rubber elastic body 5, at the same time, adjusting metal fittings 13, 14 and 15 lying between rising guide sections 10 and 11 formed in the adjusting jig 8 and the end face of an upper structural body mounting plate 1 are moved to adjust bearing positions of elastic bearing devices 3, 4 and 5, and the existing fixed bolt or the like is used to easily fix the adjusting jig 8 without accompanying the structural body and structure modification of the elastic bearing device to carry out convenient and simple work to adjust the screw amount of the bolts 13 and 16 to enable the bearing positions of the elastic bearing devices against the structure to properly adjust. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber elastic body between a lower shoe member fixed to a lower structure and an upper shoe member fixed to an upper structure, such as a civil engineering or construction structure. The present invention relates to a method for adjusting a bearing position of an elastic bearing device and an adjustment jig for the elastic bearing device, which are interposed so as to absorb expansion and contraction between upper and lower structures. In particular, it is suitable for a bridge pier and abutment as the lower structure and a bridge girder as the upper structure.

[0002]

2. Description of the Related Art Generally, in structures for civil engineering and construction, a structure for supporting an upper structure with respect to a lower structure can be found everywhere. Especially in river bridges and elevated roads, these structures will be supported and mounted on lower structures such as bridge piers, but by absorbing vertical or horizontal vibrations such as earthquakes and vehicle vibrations, To prevent damage to the structure itself or noise, or to absorb expansion and contraction of the upper structure such as bridge girders in the bridge axis direction (travel direction in terms of roads) due to temperature changes caused by seasons and weather. An elastic bearing device such as a rubber elastic body is provided between the upper structure and the lower structure. These elastic bearing devices are generally configured by interposing a rubber elastic body between a lower shoe member fixed to a lower structure such as a bridge pier and an upper shoe member fixed to an upper structure such as a bridge girder. To be done. Then, in order to improve the vertical compression resistance and the horizontal shearing force of this rubber elastic body, a large number of vertically spaced steel plates are embedded in the rubber layer.

When an elastic bearing device is newly installed between such an upper structure and a lower structure, or when the elastic bearing device is replaced due to damage or aging caused by a disaster such as an earthquake, It was necessary to properly install the elastic bearing device between the upper structure and the lower structure. In some cases, in consideration of shear deformation of the rubber elastic body due to length change of the bridge girder, such as creep or dry shrinkage of the bridge girder or expansion / contraction due to temperature change at the bridge pier, etc. I was doing it. Therefore, determination of the proper position between the upper structure and the lower structure of the elastic support device is troublesome, and a large machine such as a jack is required for the adjustment work to the proper position.

From the above, the applicant of the present invention has
An elastic bearing device for temporary fixing disclosed in Japanese Patent Laid-Open No. 11-303018 has been proposed. A rubber elastic body 106 is interposed between a lower shoe 104 fixed to the bridge pier 101 and an upper shoe 105 fixed to the bridge girder 102, and the rubber shoe 106 is provided between the upper shoe 105 and the lower shoe 104 at predetermined intervals in the bridge axial direction. The inclined slide surfaces 116 and 117 facing each other are provided, and the inclined member 118 having a through hole is vertically slidably interposed between these slide surfaces 116 and 117, and the bolt 119 and the female screw member inserted into the through hole are inserted. The elastic displacement amount of the rubber elastic body 106 in the bridge axis direction is adjusted according to the degree of screwing by 120.

[0005]

The elastic bearing device for temporary fixing proposed by the applicant of the present application reduces the number of parts and allows screwing of bolts without the need for a particularly large device such as a jack. Only by adjusting the amount, it is possible to adjust the amount of displacement of the rubber elastic body as a support in the bridge axial direction, and it is possible to remove it by a simple operation of loosening the bolt. In order to dispose the inclined slide surfaces 116 and 117 and the inclined member 118 between the upper shoe 105 and the lower shoe 104, the side block 11 is moved from the lower shoe 104 to the side block 11.
In addition to requiring a structural modification to greatly raise 3, the displacement amount can be adjusted only in the bridge axis direction by the inclined slide surfaces 116 and 117 and the inclined member 118.

In view of this, the present invention has further improved the above-mentioned proposed elastic bearing device so that it can be easily attached / detached using existing fixing bolt holes or the like, and the gap between the end surface of the mating member for position adjustment is bolted. It is an object of the present invention to provide a bearing position adjusting method having a simple structure and an inexpensive method, and an adjusting jig therefor, by easily adjusting the screwing amount in any direction.

[0007]

Therefore, according to the present invention, a rubber elastic body is interposed between a lower shoe member fixed to the lower structure and an upper shoe member fixed to the upper structure to form a vertical structure. In a method of adjusting a bearing position of an elastic bearing device configured to absorb expansion and contraction between bodies, an adjusting jig is fixed to an upper shoe member or a lower shoe member fixed to the rubber elastic body, and The support position of the elastic bearing device with respect to the upper structure or the lower structure by moving the adjusting metal fitting interposed between the upright guide portion formed on the adjusting jig and the end surface of the mounting plate of the upper structure or the lower structure. Is properly adjusted. Further, according to the present invention, a rubber elastic body is interposed between the lower shoe member fixed to the lower structure and the upper shoe member fixed to the upper structure to absorb expansion and contraction between the upper and lower structures. In an adjusting jig for attaching or replacing the elastic bearing device configured as described above to an upper structure or a lower structure, a sinker fixed to an upper shoe member or a lower shoe member fixed to the rubber elastic body. And a guide portion rising from the sinker fixing portion to the end surface of the mounting plate of the upper structure or the lower structure, and adjusting a predetermined distance between the guide portion and the end surface of the mounting plate. It is characterized in that adjustment metal fittings are provided. Further, the present invention is characterized in that, as the guide portion, there are two guide portions which are orthogonal to each other corresponding to a corner portion of a mounting plate of the upper structure or the lower structure. Further, according to the present invention, both end portions of at least one of the two guide portions along the end face of the mounting plate are formed as inclined surfaces in a direction away from the end face, and the end face of the mounting plate is correspondingly formed. The adjusting bolt and the nut are arranged between a pair of wedge-shaped metal fittings arranged between the two. In the present invention, the inclination angle of the inclined surface in the guide portion is 5 to 45.
It is characterized in that the inclination angles of the inclined surfaces of the corresponding wedge-shaped metal fittings are formed at the same angle. Further, the present invention is characterized in that the fixing member of the adjusting jig in the adjusting jig is fixed to the removing member by a fixing bolt. Further, the present invention is characterized in that the fixing of the lever fixing portion of the adjusting jig to the lever member is provided for each fixing portion of the lever member and the mounting plate of the upper structure or the lower structure. , These are the means for solving the problems.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a bearing position adjusting method and an adjusting jig thereof according to the present invention will be described below in detail with reference to the drawings. 1 to 5 show a first embodiment of the present invention, FIG. 1 is an overall perspective view of an adjusting jig fixed to a gear member, and FIG. 2A is an upper structure in which a rubber elastic body is interposed. Figure 2 (B), which is a partial cross-sectional view of the body and the lower structure in the direction perpendicular to the bridge axis
Is an overall view in the bridge axis direction, FIG. 3 is a cross-sectional view of FIG. 1, FIG. 4 is a plan view of FIG. 1, and FIG. 5 is an upper jig member and an upper structure (bridge girder) mounting plate to which an adjusting jig is fixed. It is the whole top view in the adjusted state.

According to the present invention, the rubber elastic body 5 is interposed between the lower lever member 4 fixed to the lower structure (mounting plate) 2 and the upper lever member 3 fixed to the upper structure (mounting plate) 1. In the method of adjusting the bearing position of the elastic bearing device (3, 4, 5) configured to be installed so as to absorb the expansion and contraction between the upper and lower structures, the upper shoe member 3 fixed to the rubber elastic body 5 is described. Alternatively, the adjusting jig 8 is fixed to the lower gear member 4, and between the upright guide portions 10 and 11 formed on the adjusting jig 8 and the end surface of the mounting plate 1 or 2 of the upper structure or the lower structure. It is characterized in that the support position of the elastic support device (3, 4, 5) with respect to the upper structure or the lower structure is properly adjusted by the movement of the intervening adjustment metal fittings 13, 14 and 15.

The details will be described below. Referring to FIG. 2, a description will be given of an upper and lower structure, which is an example of a pier and a bridge girder.
As shown in the left half of (A), a bridge pier mounting plate 2 in which a lower anchor 7 embedded and fixed in a bridge pier, which is a lower structure made of concrete or the like (not shown), is planted, and similarly made of concrete (not shown). The rubber elastic body 5 is interposed between the bridge girder mounting plate 1 in which the upper anchor 6 fixedly embedded in the bridge girder, which is an upper structure, is planted, with the upper and lower trough members 3 and 4 interposed therebetween.

As shown in the right half sectional view of FIG. 2A, an upper plate 5A and a lower plate 5B are fixed to the upper and lower sides of the rubber elastic body 5, and these upper and lower plates 5A and 5B are respectively attached. It is previously fixed to the upper and lower trough members 3 and 4 with a fixing bolt 21. After the rubber elastic body 5 to which these shoe members 3 and 4 are fixed is interposed between the bridge girder mounting plate 1 and the bridge pier mounting plate 2, between the upper shoe member 3 and the bridge girder mounting plate 1. After the alignment of the positions of the upper gear member 3 and the bridge pier mounting plate 2 is performed, the upper bolt member 3 and the bridge girder mounting plate 1, and the lower gear member 4 and the bridge pier are fixed by the fixing bolts 20. The mounting plate 2 is permanently fixed. In addition, in the rubber of the rubber elastic body 5, as shown in an enlarged view in FIG. 3, a large number of steel plates vertically spaced to improve vertical compression resistance and horizontal shearing force. 5C, 5C ... Are embedded in the rubber layer 5D.

As shown in FIG. 1, the adjusting jig 8 according to the present embodiment includes a lever fixing portion 9 fixed to the upper gear member 3 or the lower gear member 4 fixed to the rubber elastic body 5, and Guide parts 10 and 11 which stand up from the sinker fixing part 9 to the end surface of the mounting plate 1 or 2 of the upper structure or the lower structure,
Between the guide portions 10 and 11 and the end surface of the mounting plate 1 or 2, an adjusting metal fitting 1 for adjusting a predetermined space therebetween is provided.
3 and 14, 15 are arranged. The illustrated example is an example of adjusting the position alignment between the upper gear member 3 and the bridge girder mounting plate 1 that is the upper structure (position adjustment adjustment between the lower gear member 4 and the bridge pier mounting plate 2 that is the lower structure). Is completed or unnecessary). That is, the present embodiment is characterized in that it has, as the guide portion, two guide portions 10 and 11 which are orthogonal to each other corresponding to the corner portion of the mounting plate 1 of the upper structure. 11 may be separated as shown, or may be connected to each other in an L shape in a plan view for stiffening.

At least one of the two guide portions, for example, a direction in which both end portions of the guide portion 11 in the direction perpendicular to the bridge axis (upper right in FIG. 1) along the end surface of the mounting plate 1 are separated from the end surface. Adjustment bolts 16 and nuts 17 and 17 are provided between the pair of wedge-shaped metal fittings 14 and 15 which are formed on the inclined surfaces 12A and 12B of the mounting plate 1 and correspondingly to the end surfaces of the mounting plate 1. . Therefore, the adjusting bolt 13 is screwed into the other guide portion 10 in the bridge axis direction as an adjusting metal fitting, and the tip end thereof acts on the point P of the end surface of the mounting plate 1 in the bridge axis direction. The inclination angle of the inclined surfaces 12A and 12B in the guide portion 11 is preferably 5 to 5.
It is formed at 45 degrees. The corresponding wedge-shaped metal fittings 14, 1
The inclined angles of the inclined surfaces 14A and 15A in 5 are also formed to be the same. The working surfaces of these wedge-shaped metal fittings 14 and 15 with the end surfaces of the mounting plate 1 in the direction perpendicular to the bridge axis are formed as flat end surfaces 14B and 15B. It should be noted that the guide portion 10 side may also be an upright inclined guide portion in which a wedge-shaped metal fitting is arranged.

As shown in FIGS. 1, 3 and 4, when there is a positional mismatch between the bridge girder mounting plate 1 as the upper structure and the elastic support device, that is, the upper gear member 3, originally,
The bridge girder fixing bolt holes 19A and 19B for the fixing bolt 20 for connecting and fixing the bridge girder mounting plate 1 and the upper gear member 3 are displaced (see FIGS. 3 and 4), and the fixing bolt 20 cannot be passed through. . Therefore, as shown by the arrows in FIGS. 3 and 4, the adjusting jig 8 is set from below the upper gear member 3, and the fixing bolts 22 inserted into the gear fixing bolt holes 18 of the gear fixing portion 9 are The upper girder member 3 is screwed and fixed by using the bridge girder fixing bolt hole 19B for the existing fixing bolt 20. FIG. 5 shows a state in which a plurality of (two on the right side of the drawing) adjusting jigs 8 are fixed by using the bridge girder fixing bolt holes 19B in the upper gear member 3 in this way.

The lever fixing portion 9 of the adjusting jig 8 is fixed to the lever member 3 by means of a fixing bolt 22, and preferably the adjusting jig 8 is fixed to the lever member. The existing bridge girders or bridge pier fixing bolt holes in the member are used for screwing and fixing, but it goes without saying that a separate fixing hole may be provided. Further, preferably, the adjusting jig 8 is fixed to the lever member at each fixing portion of the lever member 3 or 4 and the upper structure mounting plate 1 or 2 of the lower structure. That is, in FIG. 5, if the adjustment jig 8 is fixed to all of the plurality of bridge girder fixing bolt holes 19, 19 ... And the position adjustment is performed, it is most effective between the upper structure and the elastic bearing device. That is, the position adjustment between the bridge girder mounting plate 1 and the upper gear member 3 is performed.

In FIG. 5, a pair of wedge-shaped metal fittings 14 and 15 between the upright tilt guide portions 11 of the two adjusting jigs 8 and the end surface of the bridge girder mounting plate 1 in the direction perpendicular to the bridge axis are attached to the space adjusting bolts 16, By adjusting by the proximity operation by 16, the end face in the direction perpendicular to the bridge axis of the bridge girder mounting plate 1 with respect to the upper gear member 3 is made parallel and flush.
At the same time, the standing guide portions 10 in the two adjusting jigs 8
Similarly, by adjusting the screwing of the adjusting bolts 13, 13 screwed into the standing guide portion 10 between the bridge girder mounting plate 1 and the end face in the bridge axial direction of the bridge girder mounting plate 1, the bridge shaft direction of the bridge girder mounting plate 1 with respect to the upper gear member 3 is similarly obtained. Parallel and flush modifications of the end faces are made.

FIG. 6 shows a second embodiment of the present invention, and is an overall perspective view of an adjusting jig fixed to a gear member. In the present embodiment, the adjusting jig 8 is composed of only the upright tilt guide portion 11 of the first embodiment. In the present embodiment, since the position adjusting function of the structure mounting plate with respect to the lever member is only on the end face side of the structure mounting plate in which the upright tilt guide portion 11 is arranged, at least as shown in FIG. When the upright inclination guide portion 11 is fixed so as to be located on the side orthogonal to the bridge axis, the adjustment of the present embodiment is also performed on the end surface side in the bridge axis direction (upper and lower end surface sides of the bridge girder mounting plate 1 in FIG. 5). It is necessary to fix the jig 8 at the same time and adjust the position. Thus, the adjustment jig having a simpler structure enables the position adjustment between the upper structure and the elastic support device.

FIG. 7 shows a third embodiment of the present invention and is an overall perspective view of an adjusting jig fixed to a gear member. In the present embodiment, the adjusting jig 8 is composed only of the flat plate-shaped standing guide portion 10 of the first embodiment. Also in the present embodiment, the position adjusting function of the structure mounting plate with respect to the lever member is the end face side of the structure mounting plate in which the flat plate-shaped standing guide portion 10 of the adjustment jig 8 having a simpler structure is arranged. At least, as shown in FIG.
When the upright tilt guide portion 10 is fixed so as to be positioned on the bridge axis side as shown in FIG.
In the above, it is necessary to simultaneously fix the adjustment jigs 8 of the present embodiment to the left and right end face sides of the bridge girder mounting plate 1 to adjust the position. Thus, the position adjustment between the upper structure and the elastic support device can be performed by the adjusting jig having a simpler structure.

Although the embodiments of the present invention have been described above, the shapes of the upper structure, the lower structure, and the gear members (in the case of only a square like the embodiment) are within the scope of the gist of the present invention. Instead, it may be circular, polygonal, etc. It is preferable that the structure mounting plate and the trough member have the same size, but they can be applied even if they do not have the same size.),
Type (applicable to piers and bridge girders, roads and foundations, buildings and foundations, etc.), shape and type of rubber elastic body, fixing form of structure and truss member, trough member and rubber elastic body Of the fixing jig, the shape of the adjusting jig (the angle in plan view formed by the pair of upright guide portions may not be right angle in conformity with the shapes of the structure attaching plate and the trough member), and the attaching manner (preferably In addition to using the existing fixing bolt holes, the fixing jig is fixed by a plurality of mounting bolts at positions surrounding the fixing bolt holes.It is also possible to fix the adjusting jig to the structure mounting plate side instead of the recess member. The shape and type of the adjustment metal fittings and the installation form on the adjustment jig (even if a pair of wedge-shaped metal fittings are placed on the stepped portion under the upright tilt guide portion to prevent falling). Good)) and the like can be appropriately adopted.

[0020]

As described above in detail, according to the present invention, the rubber elastic body is interposed between the lower shoe member fixed to the lower structure and the upper shoe member fixed to the upper structure. In a method for adjusting a bearing position of an elastic bearing device configured to absorb expansion and contraction between upper and lower structures, an adjusting jig is attached to the upper shoe member or the lower shoe member fixed to the rubber elastic body. Elasticity with respect to the upper structure or the lower structure is fixed by moving the adjusting metal fitting interposed between the upright guide portion formed on the adjusting jig and the end surface of the mounting plate of the upper structure or the lower structure. By properly adjusting the support position of the support device, the adjustment jig can be easily fixed using the existing fixing bolt holes without screwing the structure and structure of the elastic support device, and the bolts can be screwed in. Quantity adjustment and Cormorant by easy and simple work, it becomes possible to properly adjust the bearing position of the elastic support device for the structure.

Further, as an adjusting jig, a shoe fixing portion fixed to the upper shoe member or the lower shoe member fixed to the rubber elastic body, and a mounting plate of the upper structure or the lower structure from the shoe fixing portion. By arranging a guide part that rises to the end face of the and an adjusting metal fitting that adjusts a predetermined gap between the guide part and the end face of the mounting plate, With the reliable and strong adjusting function of the adjusting fitting using the guide portion, it is possible to appropriately adjust the position between the structure and the elastic supporting device. Further, when the guide portion has two guide portions that are orthogonal to each other corresponding to the corners of the mounting plate of the upper structure or the lower structure, only one adjustment jig is fixed, and the directions are orthogonal to each other. The position of the end face of the can be adjusted at the same time, and the position of the fixing part of the adjusting jig can be reduced.

Furthermore, both end portions of at least one of the two guide portions along the end surface of the mounting plate are formed as inclined surfaces away from the end surface, and the end surface of the mounting plate is correspondingly formed. When the adjusting bolt and the nut are arranged between the pair of wedge-shaped metal fittings arranged between and, a more powerful adjusting function can be given by the boosting cam function utilizing the inclined surface. Further, when the inclination angle of the inclined surface of the guide portion is formed to 5 to 45 degrees and the inclination angle of the inclined surface of the corresponding wedge-shaped metal fitting is formed to be the same angle, an appropriate booster cam mechanism is configured. Then, the position between the structure and the elastic support device can be adjusted with an appropriate adjusting force. Furthermore, when the fixing member of the adjusting jig in the adjusting jig is configured to be attachable / detachable by the fixing bolt, the adjustment jig can be easily fixed by using the existing fixing bolt or the like. Since it can be easily removed later, it does not leave any traces on the structure and looks good, and the adjustment jig can be reused without generating rust and is economical.

Further, when fixing the lever fixing portion of the adjusting jig to the lever member is provided for each fixing portion of the lever member and the mounting plate of the upper structure or the lower structure, a slightly large number is required. Although the number of adjustment jigs is required, the adjustment accuracy may be improved and the adjustment time may be short. Thus, according to the present invention, it is possible to easily attach / detach using the existing fixing bolt hole or the like, and adjust the screwing amount of the bolt to adjust the gap between the end surface of the counterpart member for position adjustment in any direction. There is provided a bearing position adjusting method and an adjusting jig therefor, which can be easily adjusted, have a simple structure, and are inexpensive.

[Brief description of drawings]

FIG. 1 shows the first embodiment of the present invention and is an overall perspective view of an adjusting jig fixed to a gear member.

FIG. 2 (A) is a partial cross-sectional view of an upper structure and a lower structure in which a rubber elastic body is interposed in a direction perpendicular to the bridge axis, and FIG. It is an overall view.

3 is a sectional view of FIG.

FIG. 4 is a plan view of FIG.

FIG. 5 is an overall plan view of the upper gear member and an upper structure (bridge girder) attachment plate in an adjustment state in which an adjustment jig is fixed thereto.

FIG. 6 shows a second embodiment of the present invention, and is an overall perspective view of an adjusting jig fixed to a gear member.

FIG. 7 shows a third embodiment of the present invention and is an overall perspective view of an adjusting jig fixed to a gear member.

FIG. 8 is an explanatory view of a conventional elastic bearing device.

[Explanation of symbols]

1 Bridge girder (upper structure) mounting plate 2 Bridge pier (lower structure) mounting plate 3 Upper shoe member (elastic bearing device) 4 Lower shoe member (elastic bearing device) 5 Rubber elastic body (elastic support device) 5A upper plate 5B lower plate 5C steel plate 5D rubber layer 6 Upper anchor 7 Lower anchor 8 Adjustment jig 9 Crane fixing part 10 Standing guide 11 Upright tilt guide 12A First inclined surface 12B Second inclined surface 13 Adjustment bolt (adjustment metal fitting) 14 1st wedge shape metal fittings (adjustment metal fittings) 14A inclined surface 14B Flat end face 15 Second wedge-shaped metal fitting (adjustment metal fitting) 15A inclined surface 15B flat end face 16 Spacing adjustment bolt 17 Spacing adjustment nut 18 Bolt fixing bolt hole 19A Bridge girder fixing bolt hole 19B Bridge girder fixing bolt hole 20 Bridge girder fixing bolt 21 Rubber support fixing bolts 22 Adjustment jig fixing bolt

Claims (7)

[Claims] 1. A rubber elastic body is interposed between a lower shoe member fixed to the lower structure and an upper shoe member fixed to the upper structure to absorb expansion and contraction between the upper and lower structures. In the method for adjusting the bearing position of the elastic bearing device configured as described above, an adjusting jig is fixed to the upper gear member or the lower gear member fixed to the rubber elastic body, and an upright guide portion formed on the adjusting jig is used. It is characterized in that the support position of the elastic support device with respect to the upper structure or the lower structure is properly adjusted by moving the adjusting metal fitting interposed between the upper structure or the lower structure and the end surface of the mounting plate. Support position adjustment method. 2. A rubber elastic body is interposed between a lower shoe member fixed to the lower structure and an upper shoe member fixed to the upper structure to absorb expansion and contraction between the upper and lower structures. In an adjusting jig for attaching or replacing the elastic bearing device configured as described above to an upper structure or a lower structure, a sinker fixed to an upper shoe member or a lower shoe member fixed to the rubber elastic body. And a guide portion rising from the sinker fixing portion to the end surface of the mounting plate of the upper structure or the lower structure, and adjusting a predetermined distance between the guide portion and the end surface of the mounting plate. A support position adjusting jig, which is provided with an adjusting metal fitting. 3. The guide portion, which is orthogonal to the corner of the mounting plate of the upper structure or the lower structure, corresponding to 2
The bearing position adjusting jig according to claim 2, wherein the jig has two guide portions. 4. The both end portions of at least one of the two guide portions along the end surface of the mounting plate are formed as inclined surfaces in a direction away from the end surface, and the end surface of the mounting plate is correspondingly formed. The support position adjusting jig according to claim 2 or 3, wherein an adjusting bolt and a nut are arranged between a pair of wedge-shaped metal fittings arranged between the two. 5. The inclination angle of the inclined surface of the guide portion is formed to be 5 to 45 degrees, and the inclination angles of the inclined surfaces of the corresponding wedge-shaped metal fittings are formed to be the same angle. Bearing position adjustment jig described in. 6. The bearing position adjusting jig according to claim 2, wherein fixing of the gear fixing portion of the adjusting jig to the gear member is configured so as to be detachable by a fixing bolt. Ingredient 7. The adjusting jig is fixed to the lever member at the lever fixing portion at each fixing portion between the lever member and the mounting plate of the upper structure or the lower structure. A method for adjusting a bearing position or a jig for adjusting a bearing position according to any one of 1 to 6.