JP2571782Y2 - Rubber bearing with lifting prevention mechanism - Google Patents

Description

[Detailed description of the invention]

A. Purpose of the invention (1) Industrial application field This invention relates to a rubber bearing for supporting a bridge, particularly a bridge between buildings, and more specifically, to a displacement of a superstructure in all horizontal directions. The present invention relates to a rubber bearing with a floating prevention mechanism suitable for use in an inter-building bridge that allows this and restrains the vertical rising of the superstructure from being used.

(2) Conventional technology Conventionally, rubber bearings used for bridges generally have a function of permitting inclination of an upper structure such as a bridge girder or expansion and contraction of the inclination and the direction of a bridge axis. A function is provided to receive the acting upward lift. For the upper lift acting on the upper structure, the lower shoe generally fixed to the lower structure such as a pier is provided with protrusions projecting from both ends in the direction perpendicular to the bridge axis of the lower shoe. A structure is adopted in which a side plate or a side block that protrudes from the upper surface and is fixed is received (for example, see Japanese Utility Model Publication No. 59-25927). However, in the bridge between buildings, the buildings facing each other vibrate individually on the basis of its own vibration characteristics, so that the bridge girder of the bridge is greatly displaced not only in the bridge axis direction but also in the direction perpendicular to the bridge axis. In addition, longitudinal vibrations are also applied, and cannot be coped with by a conventional support structure having a floating prevention function.

(3) Problems to be solved by the present invention The present invention has been made in view of the above circumstances, and allows displacement in any displacement in the horizontal direction, and effectively prevents the function of preventing floating. The purpose is to obtain a rubber bearing that can be used.

B. Configuration of the Invention (1) Means for Solving the Problems The rubber bearing with a floating prevention mechanism of the invention employs the following technical means (configuration) in order to achieve the above object. That is, a rubber bearing interposed between the upper structure and the lower structure to allow displacement of the upper structure in all directions in the horizontal direction, wherein an upper mounting plate is provided on a lower surface of the upper structure, and an upper mounting plate is provided on an upper surface of the lower structure. The lower mounting plate is fixed to each, between the upper and lower mounting plate,
At an intermediate position, a rubber bearing main body having a rubber bearing disposed vertically above and below a rigid intermediate regulating plate having a substantially rectangular flat shape and stretched in the horizontal direction is disposed, and a lower surface of the upper mounting plate is An upper engaging block having a jaw portion is disposed opposite to each other with an abutment or an allowable gap sandwiching the rubber bearing body, and an intermediate regulation between the upper surface of the jaw portion and the rubber bearing body. A lower engagement block having a downwardly extending jaw portion is fixed on the upper surface of the lower mounting plate with a predetermined gap between the rubber bearing body and the lower mounting plate. Abutting or an allowable gap, and are fixed at a predetermined interval between the lower surface of the jaw and the intermediate regulating plate of the rubber bearing body. And

(2) Operation The inclination and horizontal displacement of the upper structure are allowed by the deformation and displacement of the laminated rubber body of the rubber bearing main body. That is,
With respect to the inclination of the upper structure, the laminated rubber body of the rubber bearing body undergoes bending deformation and follows the inclination, but the intermediate regulating plate and the engagement block of the rubber bearing body maintain a predetermined interval vertically. Therefore, the inclination of the upper structure is allowed without any support.
In addition, the displacement in the horizontal direction is dealt with by the shear deformation of the laminated rubber body of the rubber bearing body, but the direction along the plane of the inner wall of the upper engagement block (this is defined as the X direction) is the lower direction. This displacement is prevented between the engaging blocks by abutting and restraining the intermediate regulating plate, and the movement of the intermediate regulating plate is allowed between the upper engaging blocks and this displacement is allowed. Also,
In the direction along the inner wall plane of the lower engagement block (the direction orthogonal to the X direction, which is referred to as the Y direction), the displacement is prevented by abutting the intermediate regulating plate between the upper engagement blocks. However, the movement of the intermediate regulating plate is allowed between the lower engagement blocks, and this displacement is allowed. Thereby, the omnidirectional displacement of the upper structure in the horizontal direction is allowed without any trouble. If a large lifting force acts on the superstructure,
The rubber bearing body is lifted by the jaw of the upper engaging block via the intermediate restricting plate. Subsequently, the intermediate restricting plate abuts against the jaw of the lower engaging block, and further lifting is prevented. .

(3) Embodiment An embodiment of a rubber bearing with a floating prevention mechanism according to the present invention will be described with reference to the drawings. (Configuration of Embodiment) FIGS. 1 to 8 show an embodiment of the present invention, and show a rubber bearing with a floating prevention mechanism which functions as a movable bearing. That is, FIG. 1 shows the overall plan configuration of this bearing, FIGS. 2 to 5 show its side configuration and cross-sectional configuration, and FIGS. 6 to 8 show its partial configuration. In the drawings, X indicates a bridge axis direction, and Y indicates a direction perpendicular to the bridge axis.

[0007] As shown in these figures, B is a bridge pier.
G is an upper structure such as a bridge girder and a connecting bridge. A rubber bearing S with a floating prevention mechanism of this embodiment is an intermediate structure between the lower structure B and the upper structure G. The upper structure G transmits the load of the upper structure G to the lower structure B and permits displacement of the bridge of the upper structure G in a direction perpendicular to the bridge axis. In this embodiment, the lower structure B and the upper structure G are both made of steel.

As shown in FIGS. 1 to 5, the rubber bearing S (hereinafter, simply referred to as "rubber bearing") with a lifting prevention mechanism includes an upper mounting plate 1 and a lower structure B which are mounted on the lower surface of the upper structure G. A lower mounting plate 2 mounted thereon, a rubber bearing body 3 interposed between the upper and lower mounting plates 1 and 2, an upper engaging block 4 fixed to the upper mounting plate 1 and engaged with the rubber bearing body 3. And a lower engaging block 5 fixed to the lower mounting plate 2 and engaged with the rubber bearing main body 3, and furthermore, interlocking of the upper mounting plate 1 and the lower mounting plate 2 with the rubber supporting main body 3. , A lower boss 8, an upper regulating bolt 9, and a lower regulating bolt 10. Here, the upper engagement block 4 and the lower engagement block 5
And is arranged so as not to interfere with.

The detailed structure of each part will be described below. The upper mounting plate 1 mounted on the mounting plates 1 and 2 and the upper structure G is formed of a rectangular plate having a predetermined thickness and being long in the Y direction, and a circular boss mounting hole 12 is opened at the center. The upper boss 7 is embedded in the boss mounting hole 12 so as to protrude from the lower portion. A screw hole 13 is screwed into the corner, and the upper regulating bolt 9 is screwed from below.

The lower mounting plate 2 mounted on the lower structure B is formed of a rectangular plate having a predetermined thickness and being long in the X direction, and a circular boss mounting hole 15 is opened in the center. Is embedded and installed so as to protrude from the upper part. A screw hole 16 is screwed in the corner,
The lower regulating bolt 10 is screwed from above.

[0011] rubber bearing body 3 rubber bearings body 3 is comprised of a Uekutsu portion 20, a lower shoe portion 21, the intermediate restricting plate 22 for being clamped to these shoes 20 and 21. In other words, it is divided into an upper upper shoe portion 20 and a lower lower shoe portion 21 via the intermediate regulating plate 22.

FIGS. 6 to 8 show the rubber bearing main body 3 taken out. As shown, the upper shoe section 20
Are a top plate 25, a bottom plate 26, and these plates 25, 2
6 and a laminated rubber body 27 sandwiched between them. Top plate 2
5 has a square shape, a boss hole 30 in which a bush 29 is mounted is opened at the center, and an insertion hole 31 for the upper regulating bolt 9 is opened at the four corners. Lower plate 26
Has the same shape as the upper surface plate 25, but is provided with a bolt insertion hole 33a at a corner. The laminated rubber body 27 is a rubber body 2
7a and the reinforcing plate 27b are alternately laminated,
Shows high pressure resistance and allows horizontal displacement. As the reinforcing plate 27b, a thin steel plate, a fiber reinforcing plate, a canvas, or the like is used, and is vulcanized together with the rubber body 27a, and is integrally molded. In the laminated rubber body 27, a mode in which a columnar lead body is further sealed at the center can be adopted. Although the laminated rubber body 27 has a prismatic shape in this embodiment, it may have a cylindrical shape, and may be made of an elastic body mainly composed of rubber without being limited to the laminated rubber.

The lower shoe section 21 has a configuration similar to that of the upper shoe section 20. That is, the upper plate 35, the lower plate 36, and the laminated rubber body 37 (the rubber body 37a and the reinforcing plate 37b) are provided. Bolt insertion holes 33 b are formed in the upper surface plate 35, respectively.
May be filled with a lead body.

The intermediate regulating plate 22 is made of a square steel plate having a predetermined thickness and has a large rigidity. Bolt insertion holes 33c are formed in the intermediate regulating plate 22 at positions corresponding to the bolt insertion holes 33a, 33b of the upper shoe portion 20 and the lower shoe portion 21, and these bolt insertion holes 33, 33b, 33c are provided.
The upper and lower shoe portions 20, 21 and the intermediate regulating plate 22 are integrally assembled with the bolts and nuts 43 inserted through the upper and lower portions.

The rubber bearing body 3 is sandwiched between the upper mounting plate 1 and the lower mounting plate 2, and these mounting plates 1 and 2 are provided with bosses 7 and 8 and regulating bolts 9 and 10, respectively. Is maintained in a predetermined positional relationship via the That is, with respect to the upper mounting plate 1, the boss 7 embedded and fixed in the center of the upper mounting plate 1 can be inserted into and removed from the boss hole 30 of the upper plate 25 of the upper shoe portion 20 of the rubber bearing main body 3. The upper regulating bolt 9 fixed to the corner of the upper mounting plate 1
5 penetrates through the insertion hole 31, and the head thereof is appropriately spaced from the upper surface plate 25. Thus, the rubber bearing main body 3 can be moved away from the upper mounting plate 1 while permitting movement only in the vertical direction. On the other hand, regarding the lower mounting plate 2, the boss 8 embedded and fixed in the center of the lower mounting plate 2 is
A lower regulating bolt 10 fixed to a corner of the lower mounting plate 2 penetrates through the insertion hole 31 of the lower plate 36. The head is kept at an appropriate distance from the lower plate 36. Thereby, the rubber bearing main body 3 is allowed to move away from the lower mounting plate 2 only in the vertical direction.

Engaging Blocks 4 and 5 Referring again to FIGS. 1 to 5, the upper engaging block 4 is formed of a plate having a predetermined thickness and a predetermined rigidity, and is fixed to the lower surface of the upper mounting plate 1. At the same time, it is arranged on both sides of the rubber bearing main body 3 in the direction perpendicular to the bridge axis (Y), and its plate surface is arranged along the X direction. In this embodiment, attachment to the upper attachment plate 1 is fixed by welding, but bolts and other appropriate fixing modes are not excluded. The inner side surface 4a of the upper engagement block 4 keeps a slight distance from the side surface of the intermediate regulating plate 22, and the jaw portion 4b formed facing the lower end thereof has a predetermined distance α from the lower surface of the intermediate regulating plate 22. Is held and arranged. Note that the distance between the inner side surface 4a and the intermediate regulating plate 22 corresponds to the expansion and contraction of the upper structure G due to a constant temperature change. It is also possible to adopt a mode in which the contact is made.

The lower engaging block 5 is formed of a plate-like body having a predetermined thickness and a predetermined rigidity in accordance with the upper engaging block 5, is fixed to the lower surface of the lower mounting plate 2, and has a rubber bearing main body 3. Are arranged on both sides in the direction of the bridge axis (X), and the plate surface is arranged along the Y direction. The inner side surface 5a of the lower engagement block 5 is slightly spaced from the side surface of the intermediate regulating plate 22, and a jaw portion 5 formed below the lower end thereof.
b is also arranged while maintaining a predetermined interval β with the lower surface of the intermediate regulating plate 22. Note that a mode in which the inner side surface 5a of the engagement block 5 abuts on the side surface of the intermediate regulating plate 22 is also possible.

The bearing S with a floating prevention mechanism of the present embodiment is
In particular, it is applied to bridges between buildings. FIG. 9 shows an example of the arrangement. In the figure, B1 and B2 are building structures which stand side by side independently of each other, and a connecting bridge G is bridged between these building structures via a bearing S. Sm is the movable bearing, Sf is the fixed bearing, and the movable bearing Sm is of course in this embodiment. In the fixed bearing Sf, a conventionally known fixed bearing for a bridge is used.

(Effects and Effects of the Embodiment) The rubber bearing S with a floating prevention mechanism of the present embodiment having the above-described structure has a tilt of the upper structure G, a horizontal displacement and a horizontal displacement, as shown in FIGS. Furthermore, it acts on the lifting force as follows.

When the upper structure G is tilted due to the passage of a vehicle or a pedestrian or the like, the laminated rubber members 27 and 37 of the rubber bearing main body 3 undergo bending deformation in response to the tilt, and follow the tilt. Since the intermediate regulating plate 22 of the rubber bearing main body 3 and the engagement blocks 4 and 5 maintain a predetermined interval vertically, the inclination of the upper structure G is allowed without being obstructed.

When a horizontal displacement force acts on the upper structure G,
The shear deformation of the laminated rubber bodies 27 and 37 of the rubber bearing main body 3 corresponds to the shear deformation. However, in the direction of the bridge axis (X), this displacement is caused by abutting and restraining the intermediate regulating plate 22 between the lower engagement blocks 5. And the movement of the intermediate regulating plate 22 is allowed between the upper engagement blocks 4 to allow this displacement. FIG. 10 shows a state in which the upper structure G has been displaced in the direction of the bridge axis. In the direction perpendicular to the bridge axis (Y), the displacement is prevented by contacting and restraining the intermediate restricting plate 22 between the upper engaging blocks 4, and the intermediate restricting plate 2 between the lower engaging blocks 5.
2 and allow this displacement. The displacement in the bridge axis direction due to a normal temperature change is included in the above-mentioned horizontal displacement component of the horizontal displacement.

When an excessive lifting force is generated in the upper structure G,
As shown in FIG. 11, the upper structure G is lifted in the direction B, and the rubber bearing body 3 is lifted by the jaw 4 b of the upper engagement block 4 via the intermediate regulating plate 22.
Subsequently, the intermediate regulating plate 22 abuts against the jaw portion 5b of the lower engagement block 5, and further lifting is prevented.

As described above, according to the rubber bearing S with the floating prevention mechanism of the present embodiment, the displacement in the direction perpendicular to the bridge axis is prevented by the intermediate regulating plate 22 of the rubber bearing main body 3 and the upper engaging block 4. And the intermediate control plate 22 and the lower engagement block 5 prevent the displacement in the bridge axis direction and allow the displacement in the direction perpendicular to the bridge axis. And at the same time, it permits tilting displacement and exhibits a function of preventing floating. Therefore, it is suitable for a bridge between buildings having various vibration characteristics. It should be noted that even in the embodiment in which the arrangement of the rubber bearing S is rotated by 90 ° in this embodiment, there is essentially no difference in the operation and effect.

The present invention is not limited to the above embodiment, and various design changes can be made within the scope of the basic technical concept of the present invention. That is, the following embodiments are included in the technical scope of the present invention. A mode in which the height of the upper shoe section 20 and the lower shoe section 21 is changed. For example, the height of the shoe portion in the direction of large displacement (usually the upper shoe portion 20 that allows displacement in the bridge axis direction) is increased. The bosses 7 and 8 are fixed to the upper plate 25 and the lower plate 36,
A mode in which it can be inserted into and removed from the upper mounting plate 1 and the lower mounting plate 2.

C. Effects of the Invention According to the rubber bearing with the floating prevention mechanism of the present invention, the intermediate regulating plate of the rubber bearing main body and the upper engagement block prevent the displacement in the uniaxial direction in the plane direction, and the uniaxial direction. To allow displacement in the other right-angled axis direction perpendicular to the axis, and to prevent the displacement in the right-angled axis direction with the intermediate restricting plate and the lower engagement block, and to allow the displacement in the one-axis direction. It can be used in any direction, and at the same time, allows a tilting displacement and exhibits a floating prevention function. Therefore, it is suitable for a bridge between buildings having various vibration characteristics.

[Brief description of the drawings]

FIG. 1 is an overall plan view of an embodiment of a rubber bearing with a floating prevention mechanism of the present invention.

FIG. 2 is a side view in the II direction of FIG. 1;

FIG. 3 is a sectional view taken along the line III-III of FIG. 1;

FIG. 4 is a side view in the IV direction of FIG. 1;

FIG. 5 is a sectional view taken along line VV of FIG. 1;

FIG. 6 is a plan view of a bearing main body.

FIG. 7 is a sectional view taken along line VII-VII of FIG. 6;

FIG. 8 is a sectional view taken along the line IIX-IIX in FIG. 6;

FIG. 9A is a side view showing an example of application to a building connecting bridge. (B) is a plan view thereof.

FIG. 10 is a perspective view showing displacement of the rubber bearing of the present embodiment in the horizontal direction.

FIG. 11 is a behavior diagram showing floating of the rubber bearing of the embodiment.

[Explanation of symbols]

B: Lower structure, G: Upper structure, S: Rubber bearing, 1: Upper mounting plate, 2: Lower mounting plate, 3: Rubber bearing body, 4 ...
Upper engagement block, 4a: jaw part, 5: lower engagement block, 5b: jaw part

Claims (4)

(57) [Scope of request for utility model registration] 1. A rubber bearing interposed between an upper structure and a lower structure, which allows displacement of the upper structure in all directions in the horizontal direction, wherein an upper mounting plate is provided on a lower surface of the upper structure, and A lower mounting plate is fixed to the upper surface of the structure, and a rigid intermediate regulating plate, which is stretched horizontally at an intermediate position and has a substantially rectangular plate shape, is sandwiched between the upper and lower mounting plates. A rubber bearing body having rubber bearings at the top and bottom is disposed, and an upper engagement block having a jaw facing upward is provided on a lower surface of the upper mounting plate to abut or allow a gap with the rubber bearing body therebetween. While being arranged opposite to each other and fixed at a predetermined interval between the upper surface of the jaw portion and the intermediate regulating plate of the rubber bearing main body. Engaging block with jaw towards the bottom Are disposed opposite to each other with an abutment or an allowable gap sandwiching the rubber bearing body from the other side, and a predetermined distance is provided between the lower surface of the jaw portion and the intermediate regulating plate of the rubber bearing body. A rubber bearing with an anti-floating mechanism, which is fixed at an interval. 2. The method according to claim 1, wherein the upper mounting plate and the upper surface of the rubber bearing main body, and the lower mounting plate and the lower surface of the rubber bearing main body are respectively connected by bosses permitting only vertical movement. Rubber bearing with anti-floating mechanism. 3. The rubber bearing according to claim 1, wherein the rubber bearing of the rubber bearing body is a laminated rubber body. 4. A rubber bearing according to claim 3, wherein a cylindrical lead body is sealed in the center of the laminated rubber body of the rubber bearing body.