JPH02167908A - Movable bearing device for structure - Google Patents

Abstract

PURPOSE:To prevent exposure of a holding member with simplified construction by providing a sliding rubber bearing body composed of a rubber stratum, a lower metallic sheet, an upper metallic sheet respectively stuck to its upper and lower sides, and a sliding bearing sheet that is stuck to the surface of the upper metallic sheet. CONSTITUTION:A lower metallic sheet 2 is stuck to the underside of a rubber stratum 1 and an upper metallic sheet 3, with a sliding bearing sheet 4 stuck thereon, is stuck to the upper side, and a sliding rubber bearing body 5 is constructed thereby. A fitting hole 6 bored to the lower metallic sheet 2 of this sliding rubber bearing body 5 is made to protrude over the surface of a lower structure 7 and is fitted to a holding member 8 that restricts the movement of the upper metallic sheet. Then the lower metallic sheet 2 is placed over the surface of the lower structure 7, while a sliding sheet 11 fixed to the underside of the upper structure 10 is placed over the sliding bearing sheet 4. A space (D) allowing shearing deformation of the rubber stratum is formed between the holding member 8 and a vertical hole bored to the rubber stratum 1 and the upper metallic sheet 3. Thereby excessive shearing deformation of the rubber stratum can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a structure movable support device that movably supports a supported part of a structure such as a prestressed concrete bridge girder.

[Conventional technology]

Conventionally, as a structure movable support device that movably supports structures such as prestressed concrete bridge girders, a lower support plate is attached to the upper surface of a base plate fixed to the upper part of a substructure, and a lower support plate is connected to the lower part of a rubber support. , an upper engagement recess and an upper engagement recess are provided on both sides of the upper support plate and the lower support plate, which are placed so as to be slidably movable in the longitudinal direction of the upper structure and are coupled to the upper part of the rubber support. A lower engaging recess is provided, and a locking part fitted over the upper engaging recess and the lower engaging recess so as to be movable downward is slidably placed on the base plate,
A structure in which an end of a concrete superstructure is connected to the upper support plate, and a locking hole for inserting and fitting a locking member is provided in the base plate on the side in the direction of contraction of the upper structure relative to the locking member. are known.

[Problem to be solved by the invention]

In the case of the conventional structure movable support device, the structure is complicated and requires a large base plate and four anchor bolts for fixing the base plate, resulting in high manufacturing costs. Since the anchor bolt and the locking member are exposed to the outside, there is a problem that they corrode over a long period of time.

The present invention does not require the use of a base plate or an anchor bolt for fixing it, has a simple structure, can be manufactured at low cost, and fixes the lower metal plate of the sliding rubber support while fixing the upper metal plate. An object of the present invention is to provide a structure movable support device in which a locking member for restricting the movement of the structure can be installed so as not to be exposed to the outside.

[Means to solve the problem]

In order to achieve the above object, in the structure movable support device of the present invention, the lower metal plate 2 and the upper metal plate 3 are fixed to the rubber layer l, and a sliding support Fi4 is provided on the upper surface of the upper metal plate 3. The fitting hole 6 provided in the lower metal Fi2 of the sliding rubber support 5 is fixed to the vertical locking member 8 protruding from the upper surface of the lower structure 7. When fitted, the lower metal plate 2 is placed on the upper surface of the lower structure 7, and between the vertical hole 9 provided in the rubber layer 1 and the upper metal plate 3 and the locking member 8,
A sliding fill is fixed to the lower part of the upper structure 10 on the sliding support plate 4 and has a gap allowing for shear deformation of the rubber layer.
is placed.

Further, in order to facilitate replacement of the sliding rubber support 14 with a locking member, the locking member 8 fitted into the fitting hole 6 provided in the lower metal plate 2 of the sliding rubber support 5 is attached to the lower part of the sliding rubber support 5. The lower part of the locking member 8 is fitted into the upward opening recess 13 provided in the upper part of the anchor member 12 which is fixed to the metal Fi2 by welding and embedded and fixed in the upper part of the lower structure 7.

[For production]

When the upper structure IO shrinks due to drying, introduction of prestress, creep, etc., the rubber layer 1 is sheared and deformed, and after the upper metal plate 3 hits the locking member 8, the upper structure 10 shrinks. A sliding plate 11 fixed to the lower part of the upper structure 10 slides on the sliding support plate 4 of the sliding rubber support 5.

Drying of the upper structure 10 2 After the introduction of pre-stressing and shrinkage due to creep, etc., when the upper structure 10 contracts due to a drop in temperature, the upper metal plate 3 is in contact with the locking member 8, and the upper structure 10 is The fixed sliding plate 11 slides on the sliding support plate 4 on the sliding rubber support 5. Next, the temperature rises and the upper structure 10
As it expands, the sliding plate 11 does not slide on the sliding support plate 4, but the sliding plate 11, the sliding support plate 4, and the upper metal plate 3 move as one, and the rubber layer 1 is sheared and deformed in the opposite direction.

〔Example〕

Next, the present invention will be explained in detail based on an example shown in the drawings.

4 and 6 show a sliding rubber support 14 with a locking member used in the first embodiment of the present invention, which is an annular steel reinforcement having a large number of through holes in the rubber layer 1. Fil 5 is buried, a lower metal plate 2 made of a steel plate is fixed to the lower surface of the rubber layer 1, and an upper metal plate 3 made of a steel plate and a synthetic resin such as tetrafluoroethylene are placed on the upper surface of the rubber layer 1. The sliding support plates 4 are sequentially placed and fixed to the rubber layer 1 in which the reinforcing plate 15 is embedded, the lower metal plate 2 and the upper metal plate 3 fixed to the rubber layer 1, and the upper metal plate 3 is fixed to the rubber layer 1 in which the reinforcing plate 15 is embedded. A sliding rubber support body 5 is constituted by the cleaned support plate 4.

A fitting hole 6 is provided in the center of the lower metal plate 2, and the rubber layer 1. A vertical hole 9 with a larger diameter than the fitting hole 6 is provided in the center of the upper metal plate 3 and the sliding support plate 4, and the middle part of the locking member 8 made of a vertical steel round bar is provided with the fitting hole 9. The locking member 8 is fitted into the matching hole 6 and fixed to the lower metal Fi2 by welding, and the upper end surface of the locking member 8 is disposed at a level between the lower and upper surfaces of the upper metal plate 3, and the locking member 8 A gap allowing shear deformation of the rubber layer is formed between the member 8 and the vertical hole 9, and the sliding rubber support 5 and the locking member 8 constitute a sliding rubber support 14 with a locking member.

FIGS. 1 and 3 show a first embodiment of the present invention using the sliding rubber support 14 with a locking member, and show a steel anchor member 12 having an upwardly opening recess 13 at its upper part. is buried in the upper part of the lower structure 7 such as a concrete pier or concrete abutment, and the upper end surface of the anchor member 12 is arranged on the same plane as the upper surface around the anchor member in the lower structure 7, and The lower part of the locking member 8 in the sliding rubber support 14 with a locking member is
The upper structure 10 is fitted into the upward opening recess 13 of the anchor member 12, the sliding rubber support 5 is placed on the upper surface of the lower structure 7 and the upper end surface of the anchor member 12, and the upper structure 10 is made of a prestressed concrete bridge girder.
A metal sliding plate 11 equipped with anchor bolts 16 is embedded and fixed in the lower part of the supported part, and the sliding plate 11
1 is placed on the sliding support plate 4 of the sliding rubber support 5.

In the case of the first embodiment, when it becomes necessary to replace the sliding rubber support 14 with a locking member due to aging of the rubber layer 1, etc.
By moving the upper structure 10 upward by a slight height, the sliding rubber support 14 with a locking member can be easily replaced.

FIG. 7 shows a sliding rubber support 5 used in a second embodiment of the present invention, in which an annular steel reinforcing plate 15 having a large number of through holes is embedded in the rubber layer 1, and the rubber A lower metal plate 2 made of a steel plate is fixed to the lower surface of the layer 1, and an upper metal plate vi made of a tone plate is fixed to the upper surface of the rubber layer l.
3 and a sliding support plate 4 made of synthetic resin such as tetrafluoroethylene are sequentially placed and fixed together, a fitting hole 6 is provided in the center of the lower metal plate 2, and the rubber layer I
, a vertical hole 9 having a larger diameter than the fitting hole 6 is provided in the center of the upper metal plate 3 and the sliding support plate 4.

FIG. 8 shows a second embodiment of the present invention using the sliding rubber support 5 shown in FIG.
The lower end of the locking member 8 is integrally connected to the upper end, and the fitting hole 6 of the lower metal +5.2 in the sliding rubber support 5
is fitted into the locking member 8, but the other configuration is the first one.
This is the same as in the embodiment.

When carrying out the present invention, a stainless steel plate may be used as the sliding member 11 fixed to the lower part of the upper structure 10, or a stainless steel plate 18 may be attached to the lower surface of the steel plate 17 as shown in FIG. A material fixed by welding or the like may be used, or a thin rubber layer may be fixed integrally to the lower surface of the lower metal plate 2.

〔Effect of the invention〕

Since this invention is configured as described above, it produces the effects described below.

There is no need to use pace plates or anchor bolts to fix them, and the structure of the structure movable support device is simple, so the structure movable support device can be manufactured at low cost. Since the locking member for fixing the lower metal plate of the support and restricting the movement of the upper metal plate can be installed so as not to be exposed to the outside, the locking member 8 will not corrode even after long-term use. The durability of the structure movable support device is not reduced, and once the rubber layer 1 is sheared and deformed until the upper metal plate 3 hits the locking member 8, further shearing deformation is prevented. It is possible to prevent layer 1 from being excessively sheared and deformed.

Further, a locking member 8 fitted into a fitting hole 6 provided in a lower metal Fi2 of the sliding rubber support 5 is fixed to the lower metal plate 2 by welding, and is embedded and fixed in the upper part of the lower structure 7. If the lower part of the locking member 8 is fitted into the upward opening recess 13 provided at the top of the anchor member 12, it becomes necessary to replace the sliding rubber support 14 with the locking member. At this time, the sliding rubber support 14 with the locking member can be easily replaced by moving the upper structure 10 upward by a small amount of height.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a longitudinal cross-sectional side view showing a structure movable support device, and FIG. 2 is a partially enlarged view of FIG. 1. FIG. 3 is a vertical side view showing a state in which the rubber layer is sheared and the upper metal plate abuts against the locking member. 4 to 6 show a sliding rubber support with a locking member used in the first embodiment, in which FIG. 4 is a vertical side view, FIG. 5 is a side view, and FIG. 6 is a side view. FIG. FIG. 7 is a longitudinal sectional side view showing a sliding rubber support used in the second embodiment of the present invention, FIG. 8 is a longitudinal sectional side view showing a structure movable support device according to the second embodiment of the invention, and FIG. The figure is a longitudinal sectional side view showing another example of the sliding plate fixed to the lower part of the superstructure. In the figure, 1: rubber layer, 2: lower metal plate, 3: upper metal plate,
4: Sliding support plate, 5: Sliding rubber support, 6: Fitting hole, 7
: Lower structure, 8; Locking member, 9: Vertical hole, l〇2 two-part structure 11: Sliding plate, 12: Anchor member, 13: Upward opening recess, 14: Sliding rubber support with locking member , 17
: Steel plate, 18 d stainless steel plate.

Claims (2)

[Claims] (1) The lower metal plate 2 and the upper metal plate 3 are fixed to the rubber layer 1, and the sliding support plate 4 is fixed to the upper surface of the upper metal plate 3 to constitute a sliding rubber support 5, and the sliding support plate 4 is fixed to the upper surface of the upper metal plate 3. A fitting hole 6 provided in the lower metal plate 2 of the rubber support 5 is fitted into a vertical locking member 8 protruding from the upper surface of the lower structure 7, and the lower metal plate 2 is fitted into the lower metal plate 2.
A rubber layer shear deformation allowable gap D is formed between the locking member 8 and the vertical hole 9 placed on the upper surface of the rubber layer 1 and the upper metal plate 3, and the sliding support plate 4 A structure movable support device in which a sliding plate 11 fixed to the lower part of an upper structure 10 is placed. (2) The locking member 8 fitted into the fitting hole 6 provided in the lower metal plate 2 is fixed to the lower metal plate 2 by welding, and the anchor is embedded and fixed in the upper part of the lower structure 7 Part 1
A structure movable support device in which a lower part of the locking member 8 is fitted into an upwardly opening recess 13 provided at the upper part of the structure movable support device.