JPH0639767B2 - Preliminary shear deformation holding device for rubber bearing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is used when setting a pre-shear-deformed rubber bearing between an upper structure such as a bridge girder and a lower structure such as a bridge pier or abutment. The present invention relates to a preliminary shearing deformation holding device.

[Prior art]

Conventionally, in the case of the preliminary shear deformation holding device for rubber bearings disclosed in Japanese Patent Laid-Open No. 62-45803,
As shown in FIGS. 1 to 13, the rubber layer 1 in a rubber bearing 4 composed of a rubber layer 1 and an upper metal plate 2 and a lower metal plate 3 integrally provided with the rubber layer 1 is The metal front support member 12 including the lower plate 9 and the upper plate 10 and a large number of ribs 11 connecting them is pre-shear-deformed so as to be displaced forward and the lower part is displaced rearward. It is arranged in the front part of 4 and the bottom plate 13
A metal rear support member 16 composed of the upper plate 14 and a large number of ribs 15 connecting them is arranged at the rear of the rubber support 4, and the front end of the lower metal plate 3 in the rubber support 4 is attached to the front support member 12. , The rear end of the upper metal plate 2 of the rubber bearing 4 is engaged with the rear bearing member 16, and the metal front bearing is supported via the metal connecting members 17 arranged on both left and right sides of the rubber bearing 4. Member 12 and metal rear support member 1
The left and right end portions of 6 are connected, and the left and right connecting members 17
Both end portions of the upper plate 1 are connected by bolts 18,
The disengagement preventing projections 19 and 20 provided on the lower metal plates 0 and 14 are arranged in the recesses 21 and 22 provided on the upper part of the upper metal plate 2, and the disengagement preventing projections 2 provided on the lower plates 9 and 13 are arranged.
Recesses 25 and 26 in which 3, 24 are provided in the lower part of the lower metal plate 3.
It is placed inside.

[Problems to be solved by the invention]

However, in the case of the above-mentioned conventional preliminary shear deformation holding device, the metal front support member 12 and the metal rear support member 16 and the connecting members 17 on the left and right sides of the three-dimensional structure extending over the entire width of the rubber support 4, Since the rubber bearing 4 is arranged so as to surround the entire circumference, there is a problem that the rubber bearing 4 is large, heavy, costly, and has a complicated structure.

[Object and Structure of Invention]

An object of the present invention is to provide a pre-shear deformation holding device for a rubber bearing that can advantageously solve the above-mentioned problems, and the gist of the present invention is to provide the rubber layer 1 and the rubber layer 1 integrally therewith. In the rubber bearing 4 composed of the upper metal plate 2 and the lower metal plate 3, pre-shear deformation is performed so that the upper portion of the rubber layer 1 is displaced forward and the lower portion is displaced rearward. Holding plate 7 placed on
The rear stopper 5 that is engaged with the rear end of the upper metal plate 2.
Is fixed, and a front stopper 6 engaged with the front portion of the lower metal plate 3 is fixed to each of the holding plates 7, and a space is provided in the front-rear direction between the side portion of the upper metal plate 2 and each of the holding plates 7. The plurality of locking pins 8 arranged in advance are inserted, and the lower metal plate 3
A plurality of locking pins 8 arranged at intervals in the front-rear direction are inserted between the side portions of the holding plate 7 and the holding plates 7, and both ends of the left and right holding plates 7 are connected via bolts 18. The pre-shear deformation holding device for rubber bearings is characterized by

〔Example〕

The present invention will now be described in detail with reference to the illustrated example. 1 to 5 show a preliminary shearing deformation holding device for a rubber bearing according to an embodiment of the present invention, in which the upper and lower surfaces of a rectangular or square rubber layer 1 whose corners are arcuate. A rectangular or square upper metal plate 2 and a lower metal plate 3 are integrally fixed to each other, and an upper locking protrusion 27 is integrally provided at the center of the upper surface of the upper metal plate 2 and the center of the lower surface of the lower metal plate 3. The lower support protrusion 28 is integrally provided on the rubber support 4 to configure the rubber support 4.

The rubber layer 1 of the rubber bearing 4 is pre-shear-deformed so that the upper portion of the rubber layer 1 is displaced forward and the lower portion is displaced rearward, and is in contact with both left and right side surfaces of the rubber bearing 4. On the upper rear part of the inner surface of the holding plate 7 made of a metal plate,
A horizontal rear stopper 5 engaged with the rear end surface of the upper metal plate 2 is fixed by welding, and a horizontal front stopper engaged with the front end surface of the lower metal plate 3 at the lower front portion of the inner surface of the holding plate 7. The partial stopper 6 is fixed by welding, and the holding plate 7 and the rear stopper 5 and the front stopper 6 fixed to the holding plate 7 constitute a holding plate 29 with a stopper.

A plurality of pin insertion circular holes 30 are provided respectively on the left and right sides of the upper metal plate 2 and on the left and right sides of the lower metal plate 3, and the pin insertion circular holes 30 are provided on the upper and lower portions of the holding plate 7. A long hole 31 for pin insertion extending in the front-rear direction is provided at a position facing each other, and the steel locking pin 8 extends over the long hole 31 for pin insertion and the circular hole 30 for pin insertion.
Has been inserted.

When the rubber bearing 4 is pre-shear-deformed and held in that state, a compressive force is applied to the rubber bearing 4 from above and the lower metal plate 3 is fixed, and lateral pressure is applied to the upper metal plate 2 by a jack. , The rubber layer 1 is shear-deformed in the front-rear direction, then holding plates 29 with stoppers are arranged on both left and right sides of the rubber bearing 4, and the rear stopper 5 of the holding plate 29 with stoppers is engaged with the rear end surface of the upper metal plate 2. The front stopper 6 of the holding plate 29 with stopper is arranged so as to engage with the front end surface of the lower metal plate 3, and the holding plate 7, the upper metal plate 2 and the lower metal plate 3 A bolt 18 inserted through the locking pin 8 and through both ends of the left and right holding plates 7 respectively.
To prevent the rubber bearing 4 and the holding plate 29 with stoppers from coming off, and then release the pre-compression force and lateral pressure.

When the pre-shear deformation is applied to the rubber layer 1 and the vertical compressive force is released from the rubber bearing 4, the pre-shear deformation restoring force of the rubber layer 1 causes the upper metal plate 2 and the lower metal plate 3 to tilt in the front-back direction. However, the inclination is blocked by the locking pin 8.

The upper metal plate 2, the lower metal plate 3 and the holding plate 29 with a stopper are made of steel, for example.

FIGS. 6 to 8 show a state in which the rubber bearing held by the preliminary shearing deformation holding device of the above-mentioned embodiment is set between the lower structure and the upper structure, such as a pier or abutment. A steel base plate 33 is placed on the upper surface of the lower structure 32 and fixed by a plurality of anchor bolts 34, the rubber bearing 4 and the holding plate 7 are placed on the base plate 33, and the lower part of the lower metal plate 3 is The lower locking projection 28 is the lower locking recess 35 of the base plate 33.
And a steel reaction force receiving member 36 is fixed to the upper surface of the base plate 33 by welding at a position facing one end portion of each holding plate 7 in the front-rear direction. A screw hole 37 for mounting the jack receiving member is provided between the force receiving member 36 and the force receiving member 36.

Steel sole plate 3 on upper metal plate 2 of rubber bearing 4
8 is placed, the upper locking projection 27 on the upper part of the upper metal plate 2 is fitted into the upper locking recess 39 of the sole plate 38, and the upper part of the upper locking recess 39 is placed on the upper surface of the sole plate 38. A steel cover plate 40 to be closed is fixed by welding or an adhesive, and a large number of anchor members 41 are fixed to the upper portion of the sole plate 38 by screwing or welding.

As described above, the rubber bearing 4 held by the preliminary shearing deformation holding device is set on the base plate 33, and the sole plate 38 having the anchor member 41 is set on the rubber bearing 4 and then the bridge girder. Concrete that constitutes the upper structure 42 such as the above is placed.

After the concrete has hardened, the bolt 18 is removed from the holding plate 7 and, as shown in FIG.
The steel jack support 43 that contacts the base plate 33
And then fixed by bolts 44, and then fixed by a bolt or the like to the jack receiving member 43, which is a detaching jack 45 composed of a hydraulic jack arranged between the end of the holding plate 7 and the jack receiving member 43. Then, one end of the holding plate with stopper 29 is pushed outward by the jack 45 to remove the stopper of the holding plate with stopper 29 from the metal plate of the rubber bearing 4, and the jack receiving member 43 is removed. Correspondingly, the locking pin 8 is removed and brought into the state shown in FIG.

Next, prestress is introduced into the upper structure 42, and the prestressing causes the upper structure 42 to shrink and creep, and the upper structure 42 to dry and shrink, so that the rubber layer 1 of the rubber bearing 4 is preliminarily sheared and deformed. To shear deformation.

When removing the holding plate 29 with stopper from the rubber bearing 4, the reaction force receiving member 36 and the jack receiving member 43 are attached to the base plate 3
3 may be fixed to both front and rear sides, and both ends of the stopper-equipped holding plate 29 may be simultaneously pushed and moved by the jacks to remove the stopper-equipped holding plate 29 from the rubber bearing 4.

Further, when carrying out the present invention, the locking pin 8 may be press-fitted and fixed in the pin insertion circular holes 30 of the upper metal plate 2 and the lower metal plate 3, or the upper metal plate 2 and the lower metal plate 3 may be fixed.
A female screw is provided in the pin insertion circular hole 30 and a male screw is provided in the locking pin 8, and the locking pin 8 is screwed and fixed to the pin insertion circular hole 30 of the upper metal plate 2 and the lower metal plate 3. May be.

The jack receiver 43 may be fixed to the base plate 33 before placing the concrete of the upper structure 42, or the jack receiver 43 may be fixed to the base plate 33 before placing the concrete of the upper structure 42. In addition, the detaching jack 45 may be interposed between the jack receiver 43 and the end portion of the holding plate 7.

〔The invention's effect〕

According to the present invention, the upper part of the rubber layer 1 in the rubber bearing 4 composed of the rubber layer 1 and the upper metal plate 2 and the lower metal plate 3 integrally provided thereto is displaced forward and the lower part is displaced rearward. The rear stoppers 5 engaged with the rear end portions of the upper metal plates 2 are fixed to the holding plates 7 which are pre-shear-deformed so as to be positioned, and which are arranged on both left and right sides of the rubber bearing 4, and are attached to the holding plates 7. A front stopper 6 that is engaged with the front portion of the lower metal plate 3 is fixed, and a plurality of locking pins that are arranged at intervals in the front-rear direction across the side portion of the upper metal plate 2 and each holding plate 7. 8 are inserted, and a plurality of locking pins 8 arranged at intervals in the front-rear direction are inserted across the side portion of the lower metal plate 3 and each holding plate 7, and both ends of the left and right holding plates 7 are bolted. Since it is connected via 18, a pair of strikes with a simple structure and small size and light weight The path with the holding plate 29 can hold the rubber bearing 4 facilitates preliminary shear deformation,
Further, since the plurality of locking pins 8 arranged at intervals in the front-rear direction are inserted through the upper metal plate 2 and the lower metal plate 3 of the rubber bearing 4 and the holding plate 7, the rubber bearing 4 and the left and right sides are inserted. It is possible to eliminate the risk that the holding plate 29 with the stopper of the above will relatively shift in the vertical direction and come off, and it is possible to eliminate by the simple means. The inclination of the metal plate 2 and the lower metal plate 3 in the front-rear direction is determined by the locking pin 8
The holding plate 29 with stoppers can be prevented from coming off from the rubber bearing 4 during transportation and handling by the bolts 18 connecting the ends of the holding plates 7 on both the left and right sides. Further, the pre-shear deformation holding device for rubber bearings according to the present invention has a simple structure and a small size, so that it can be manufactured at a low cost and is lightweight, so that it is easy to handle.

[Brief description of drawings]

1 to 5 show a preliminary shearing deformation holding device for a rubber bearing according to an embodiment of the present invention. FIG. 1 is a side view, FIG. 2 is a longitudinal side view, and FIG. Top view, 4th
The figure is a side view showing a part of it in an enlarged manner, and FIG.
It is an A line sectional view. 6 to 8 show a state in which a rubber bearing held by a preliminary shearing deformation holding device and a sole plate with anchor members are sequentially set on a base plate fixed to a lower structure,
6 is a vertical side view, FIG. 7 is a plan view, and FIG. 8 is a front view. FIG. 9 is a plan view showing a state where the holding plate with stopper is removed from the rubber bearing, and FIG. 10 is a rubber bearing on the base plate and the sole with anchor member after the holding plate with stopper and the steel jack receiver are removed. It is a top view which shows a plate. 11 to 13 show a conventional pre-shear deformation retaining device for a rubber bearing, wherein FIG. 11 is a longitudinal side view, FIG. 12 is a side view, and FIG.
FIG. 3 is a plan view. DESCRIPTION OF SYMBOLS 1 ... Rubber layer, 2 ... Upper metal plate, 3 ... Lower metal plate, 4 ... Rubber support, 5 ... Rear stopper, 6 ... Front stopper, 7 ... Holding plate, 8 is a locking pin, 18 ... Bolt, 27 ... Upper locking protrusion, 28 ... Lower locking protrusion, 29 ... Holding plate with stopper,
30 ... Circular hole for pin insertion, 31 ... Long hole for pin insertion, 32
... lower structure, 33 ... steel base plate, 34 ... anchor bolt, 35 ... lower locking recess, 36 ... steel reaction force receiving material, 38 ... steel sole plate, 39 ... upper locking recess,
41 ... Anchor member, 42 ... Upper structure, 43 ... Steel jack receiver, 44 ... Bolt, 45 ... Removal jack.

Claims (1)

[Claims] 1. A rubber bearing 4 consisting of a rubber layer 1 and an upper metal plate 2 and a lower metal plate 3 which are provided integrally with the rubber layer 1 has its upper part displaced to the front and its lower part displaced to the rear. The rear stoppers 5 engaged with the rear end portions of the upper metal plates 2 are fixed to the holding plates 7 which are pre-shear-deformed as described above and arranged on both the left and right sides of the rubber bearing 4, and the holding plates 7 are attached to the respective holding plates 7. A front stopper 6 engaged with the front portion of the lower metal plate 3.
Are fixed, and a plurality of locking pins 8 arranged at intervals in the front-rear direction are inserted between the side portion of the upper metal plate 2 and each holding plate 7, and the side portion of the lower metal plate 3 and each holding plate. 7, a plurality of locking pins 8 arranged at intervals in the front-rear direction are inserted, and both ends of the left and right holding plates 7 are connected via bolts 18. Pre-shear deformation holding device.