JPH0340883Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a sliding bearing for supporting bridge girders or other structures.

(Prior Art) Conventionally, as a support interposed between the movable end of a structure such as a bridge girder and a support base such as an abutment or pier, a support body consisting of a lower shoe and an upper shoe slidably placed on the lower shoe has been used. A sliding bearing is known.

On the other hand, when the structure is a simple girder, the upper foot of the sliding bearing is fixed to the girder by an anchor member, etc., and when the girder is supported via the sliding bearing by a support base such as an abutment or a bridge pier, It is necessary to arrange the lower shoe at a predetermined position in the longitudinal direction of the girder with respect to the upper shoe. Therefore, with the lower shoe temporarily fixed to the upper shoe at a predetermined position in the longitudinal direction of the girder, the upper shoe is fixed to the girder, and the girder equipped with the sliding bearing is installed on the support base. If the temporary fixing is released, erection of the girder using sliding bearings becomes extremely easy.

(Purpose and structure of the invention) The purpose of the invention is to provide a sliding bearing that can advantageously solve the above-mentioned problems.
A protrusion 4 having an inverted trapezoidal cross section extending in the longitudinal direction of the structure is integrally provided at the center of a metal reinforcing support plate 3 that is integrally provided on the upper surface of the rubber layer 2 in the metal reinforcing support plate 3. A groove 6 having an inverted trapezoidal cross section is provided in the lower central part of the metal upper shoe 5 which is placed on the upper shoe 3 through a synthetic resin sliding layer, and the protrusion 4 is fitted into the groove 6. 4 and the upper shoe 5 are temporarily fixed by a screw 7 made of a low shear strength material such as aluminum or synthetic resin, which is inserted through the upper shoe 5 and screwed onto the protrusion 4. Located on sliding bearings.

(Example) Next, the present invention will be explained in detail using illustrated examples.

1 to 4 show a first embodiment of the present invention, in which a reinforcing support plate 3 made of metal such as steel is integrally fixed to the upper surface of a rubber layer 2, and the center of the reinforcing support plate 3 is Provided integrally with a protrusion 4 having an inverted trapezoid cross section extending in the longitudinal direction of the structure on the upper part, and on horizontal upper surfaces on both sides of the protrusion 4 in the reinforcing support plate 3,
A sliding support plate 8 made of tetrafluoroethylene (Teflon) or other synthetic resin is fixed together with an adhesive or other means, and the protrusion 4
A plurality of screw holes 9 are provided at intervals in the longitudinal direction of the ridge, and a lower reinforcing plate 10 made of a steel plate or other metal plate is integrally fixed to the lower surface of the rubber layer 2. A steel reinforcing ring 11 is buried in the middle part, and the lower shoe 1 is constituted by the rubber layer 2, the metal reinforcing support plate 3, the protrusion 4, the sliding support plate 8, the lower reinforcing plate 10, and the steel reinforcing ring 11. has been done.

A groove 6 extending in the longitudinal direction of the structure and having an inverted trapezoid cross section is provided in the lower central part of the metal upper shoe 5 made of stainless steel, and a plurality of steel anchor members 12 are fixed to the upper part of the upper shoe 5 by welding. Furthermore, a plurality of through holes 1 for screw insertion are provided in the center of the upper shoe 5.
3 are provided at intervals in the longitudinal direction of the groove.

The protrusion 4 on the lower shoe 1 is slidably fitted into the groove 6 on the upper shoe 5, and the screw 7 made of a low shear strength material such as aluminum or synthetic resin is inserted into the through hole 13 to tighten the screw. It is screwed into the hole 9, and the upper shoe 5 and the lower shoe 1 are temporarily fixed by the groove 6. By embedding the anchor member 12 in the movable end of a concrete structure 14 such as a concrete bridge girder, the upper shoe 5 of the sliding bearing is fixed to the movable end of the structure 14, and the upper shoe 5 of the sliding bearing is The lower shoe 1 is placed on a support 15 such as a concrete abutment or pier. In addition, the lower shoe 1 and the support stand 15
In order to increase the frictional resistance with the lower reinforcing plate 1
A rubber layer may be integrally provided on the lower surface of 0.

After the movable end and the fixed end of the structure 14 are installed on the support base 15 via the sliding support and the fixed support, if the structure 14 expands or contracts due to changes in temperature, etc., the expansion/contraction force of the structure 14 The screws 7 are sheared, and the temporary fixation by the screws 7 is released, so that the upper shoe 5 freely slides on the lower shoe 1 in the longitudinal direction of the structure as the structure 14 expands and contracts. .

5 and 6 show a second embodiment of the present invention, in which a steel upper shoe 5 having a groove 6 as described above has ethylene tetrafluoride (ethylene tetrafluoride) on the horizontal lower surface on both sides of the groove 6. A sliding support plate 16 made of Teflon or other synthetic resin is fixed with adhesive or other means, and the sliding support plate 16 is attached to the lower shoe 1.
The other structure is the same as that of the first embodiment.

As shown in FIG. 7, there are many screw holes 9 in the protrusion 4.
are provided at a constant pitch P1, and a large number of through holes 13 for screw insertion are provided in the upper shoe 5 at a constant pitch P2 different from the pitch P1, and the upper shoe 5 and the protrusion 4 are provided at a constant pitch P1.
If the screws 7 are temporarily fixed with one screw 7, the lower shoe 1 can be fixed by appropriately selecting the screw insertion hole 13 and the screw hole 9 in which the screw 7 is set.
The relative positions of the structure and the upper shoe 5 in the longitudinal direction can be easily adjusted and temporarily fixed.

When constructing the present invention, the lower reinforcing plate 10 of the lower shoe 1 may protrude laterally than the rubber layer 2 and that portion may be fixed to the support base with bolts or other means, or the lower shoe 1 may be fixed to the support base with bolts or other means. The lower reinforcing plate 10 may be fixed to the support base by any other arbitrary means.

(Effect of the invention) According to the invention, the metal reinforcing support plate 3 is integrally provided on the upper surface of the rubber layer 2 in the lower shoe 1.
A metal upper shoe 5 is integrally provided with a protrusion 4 having an inverted trapezoid cross section extending in the longitudinal direction of the structure in the center thereof, and is placed on the metal reinforcing support plate 3 via a synthetic resin sliding layer. A groove 6 having an inverted trapezoid cross section is provided in the center of the lower part of the structure, and the protrusion 4 is fitted into the groove 6, so that even if the weight of the lower shoe 1 is considerably large, the sliding bearing can be attached to the lower part of the structure. When the lower shoe 1 is attached to the upper shoe 5 and transported, it can be firmly held so that it does not fall off the upper shoe 5.
and the upper shoe 5 are temporarily fixed by screws 7 inserted through the upper shoe 5 and screwed onto the protrusion 4, so when the sliding bearing is attached to the lower part of the structure and transported, the lower part It is possible to prevent the shoe 1 from moving in the longitudinal direction of the protrusion with respect to the upper shoe 5, and by appropriately setting the screw insertion position in the upper shoe 5 and the position of the screw hole 9 in the protrusion 4, the upper shoe can be prevented from moving in the longitudinal direction of the protrusion. The position of the lower shoe 1 in the longitudinal direction of the structure with respect to the shoe 5 can be set at a predetermined position, making it easy to construct the structure using sliding bearings, and furthermore, the lower shoe 1 can be seated on the support base. After this, if the structure expands or contracts due to changes in temperature, etc., the screws 7 can be automatically sheared by the horizontal expansion and contraction force of the structure, and the temporary fixation by the screws 7 can be released. Due to the horizontal expansion and contraction, the upper shoe is 5 compared to the lower shoe 1.
can be slid freely. Also, lower shoe 1
By fitting the protrusion 4 with the groove 6 of the upper shoe 5, it is possible to prevent the relative displacement movement of the lower shoe 1 and the upper shoe 5 in the width direction of the structure, and also to prevent external forces in the width direction of the structure. The protrusions 4 and grooves 6 are used to reliably transmit the information from the upper shoe 5 to the lower shoe 1 to the support base, and to prevent the lower shoe 1 and the upper shoe 5 from moving away from each other in the vertical direction. Lower shoe 1 and upper shoe 5
Furthermore, a screw 7 for preventing relative displacement movement of the structure in the longitudinal direction between the lower shoe 1 and the upper shoe 5 is also provided at the center in the width direction of the lower shoe 1 and the upper shoe 5. Therefore, effects such as the ability to manufacture a sliding bearing having a means for preventing vertical separation and a means for preventing a structure from shifting in the longitudinal direction can be manufactured in a small size can be obtained.

[Brief explanation of drawings]

Figures 1 to 4 show a first embodiment of the present invention, in which Figure 1 is a longitudinal sectional front view of a sliding bearing, Figure 2 is a longitudinal sectional side view thereof, and Figure 3 is a sliding bearing. FIG. 4 is a side view showing a state in which the structure is used, and FIG. 4 is a longitudinal sectional side view showing a state in which the end of the structure is placed on a support base via a sliding support. FIG. 5 is a vertical cross-sectional front view showing a sliding bearing according to a second embodiment of the present invention, FIG. 6 is a vertical cross-sectional side view thereof, and FIG. 7 is a vertical cross-sectional view showing a sliding bearing according to a third embodiment of the present invention. FIG. 1...Lower shoe, 2...Rubber layer, 3...Metal reinforcement support plate, 4...Protrusion, 5...Metal upper shoe, 6
...groove, 7...screw, 8...sliding support plate, 9...
Screw hole, 10... Lower reinforcing plate, 12... Steel anchor member, 13... Through hole for screw insertion.

Claims (1)

[Scope of utility model registration request] A protrusion 4 having an inverted trapezoidal cross section extending in the longitudinal direction of the structure is integrally provided at the center of a metal reinforcing support plate 3 that is integrally provided on the upper surface of the rubber layer 2 of the lower shoe 1. A groove 6 having an inverted trapezoidal cross section is provided in the lower central part of the metal upper shoe 5 which is placed on the reinforcing support plate 3 via a synthetic resin sliding layer, and the protrusion 4 is fitted into the groove 6. The protrusion 4 and the upper shoe 5 are temporarily fixed by a screw 7 made of a low shear strength material such as aluminum or synthetic resin, which is inserted through the upper shoe 5 and screwed onto the protrusion 4. Features a sliding bearing.