JPH0248494Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a stopper device for restricting the movement of bridges and other structures to prevent them from falling from abutments, piers, and other supporting structures due to strong horizontal earthquake forces. It is.

Conventionally, support structures have been used as a stopper device for restricting movement of bridges and other structures supported by rubber bearings from falling from support structures such as bridge abutments or piers due to strong horizontal earthquake forces. An upward protrusion for locking is integrally provided in the center of the upper surface of the lower stopper member fixed to the upper part of the body, and a downward opening recess for locking is provided in the center of the lower surface of the upper stopper member fixed to the lower part of the structure. A structure is known in which the upward protrusion is disposed within the downward opening recess, and a gap is provided between the upward protrusion and the downward opening recess to allow the structure to expand and contract.

When installing a stopper device with this structure, first the lower part of the lower stopper member is embedded and fixed in the upper part of the concrete support structure, then the formwork for constructing the concrete structure is assembled and concrete for the structure is poured. .

When assembling the formwork, if the horizontal relative positions of the upper anchor member and the lower anchor member are incorrect, concrete for the structure will be placed in that state, so There is a problem in that a gap of a predetermined size that allows the structure to expand and contract is not formed between the upward protrusion and both ends of the structure in the longitudinal direction of the downwardly opening recess, which hinders the structure's expansion and contraction due to temperature changes, etc. .

Furthermore, if a gap of at least a certain level is not provided between the upper surface of the lower stopper member and the lower surface of the upper stopper member, when the structure is bent, the upper stopper member will butt against the lower stopper member, which will cause the structure to become rubbery. There is a problem in that the structure cannot be supported elastically by the support, and it also has a negative effect on the expansion and contraction of the structure.

SUMMARY OF THE INVENTION An object of the present invention is to provide a stopper device for restricting the movement of a structure that can easily solve the above-mentioned problems.

Next, embodiments of the present invention will be described in detail based on the drawings.

1 to 8 show an embodiment of the present invention, in which a plurality of ribs 7 and a plurality of female threaded cylinders 8 are integrally provided at the lower part of a steel lower stopper member 1. A male threaded portion at the upper end of a lower anchor member 9 made of a steel rod is screwed into 8, and the lower anchor member 9 is fixed to the female threaded tube 8 by welding. Upward locking protrusion 2 with circular cross section
is integrally provided on the upper surface 10 of the lower stopper member 1, around the upward protrusion 2.
Two circular recesses 11 and four female screw holes 12 are provided at intervals in the circumferential direction of the protrusion,
The lower part of the hollow cylindrical rubber positioning piece 5, which has a washer 13 embedded and fixed therein, is fitted into the recess 11 of the lower stopper member 1, passes through the washer 13, and is inserted into the female screw hole 14 of the lower stopper member 1. The lower part of the positioning piece 5 is fixed to the lower stopper member 1 by the screwed fixing screw 15.

A plurality of ribs 1 on the upper part of the steel upper stopper member 3
6 and a plurality of internally threaded cylinders 17 are integrally provided,
A male threaded portion at the lower end of an upper anchor member 18 made of a steel rod having a flange at the upper end is screwed into the female threaded cylinder 17, and the upper anchor member 18 is fixed to the female threaded cylinder 17 by welding, and an upper stopper member At the center of the lower surface 19 of 3, an oblong downward opening recess 4 for locking is provided that extends in the longitudinal direction of the structure. Further, the lower surface 19 of the upper stopper member 3 is provided with four circular recesses 6 around the downward opening recess 4 that match the recesses 11, and the upper stopper member 3 is provided with the female threads around the downward opening recess 4. Four screw insertion holes 20 that match the holes 12 are provided.

Each recess 6 in the upper stopper member 3 is fitted and placed on the upper part of the rubber positioning piece 5 fixed to the lower stopper member 1, and the upper surface 10 of the lower stopper member 1 and the lower surface 1 of the upper stopper member 3
A gap G is provided between the through hole 2 and the through hole 2.
A temporary fixing screw 21 inserted through the hole 0 is screwed into the female threaded hole 12, and the temporary fixing screw 21 temporarily connects the lower stopper member 1 and the upper stopper member 3 so that they do not separate, and the downward opening A structure expansion/contraction allowable gap L is provided between both ends of the structure in the longitudinal direction of the recess 4 and the upward protrusion 2 .

When installing the stopper device of the above embodiment,
First, with the downward opening recess 4 of the stopper device arranged so as to extend in the longitudinal direction of the structure 22 such as a concrete bridge girder to be constructed, lower portions of the lower anchor member 9 and the lower stopper member 1 are attached to the concrete of the bridge or abutment. Embedded and fixed in the support structure 23 of. Next, a groove-shaped formwork 24 for constructing the structure 22 is assembled, and an upper stopper member 3 is inserted into the opening provided in the bottom plate of the formwork 24.
After fitting, the temporary fixing screws 21 are removed, and then structural concrete is poured into the formwork 24.

Note that a rubber support is installed between the support structure 23 and the structure on the side of the stopper device.

A structural expansion/contraction allowable gap L between both ends of the downward opening recess 4 and the upward protrusion 2 in the stopper device.
is provided, so the structure 22 can freely expand and contract. Furthermore, when the structure 22 attempts to move significantly due to a strong horizontal seismic force, the movement of the structure 22 is restricted by the engagement between the upward protrusion 2 and the downward opening recess 4. When the amount of lateral movement of the upper stopper member 3 with respect to the lower stopper member 1 is relatively small, as shown in FIG. 5 is deformed and the amount of lateral movement of the upper stopper member 3 relative to the lower stopper member 1 exceeds a certain level, the upper part of the rubber positioning piece 5 comes off from the recess 6 and the upper stopper member 3 is moved as shown in FIG. Slide the bottom surface 19 of.

In the case of the above embodiment, the rubber positioning piece 5 is attached in advance.
The lower part of the rubber positioning piece 5 is fitted into the recess 11 of the lower stopper member 1 and fixed, and then the upper part of the rubber positioning piece 5 is fitted into the recess 6 of the upper stopper member 3. The upper part of the piece 5 may be fitted into the recess 6 of the upper stopper member 3 and fixed, and then the lower part of the rubber positioning piece 5 may be fitted into the recess 11 of the lower stopper member 1. Further, the number of the rubber positioning pieces 5 may be three or five or more, and the number of temporary fixing locations using the temporary fixing screws 21 may be two or more.

Furthermore, as shown in FIG. 11, one end of the cylindrical rubber positioning piece 5 may be fitted into the recess of the lower stopper member 1 or the recess of the upper stopper member 3 and fixed with adhesive 25. .

According to the present invention, when the lower stopper member 1 is fixed to the support structure 23, the upper stopper member 3
When pouring concrete for a structure so as to embed the upper part of the lower stopper member 1, the upward protrusion 2
and three or more rubber positioning pieces 5 provided between the lower stopper member 1 and the upper stopper member 3 around the downward opening recess 4 of the upper stopper member 3.
0 and the lower surface 19 of the upper stopper member 3, and one end of the positioning piece 5 in the vertical direction is located between the lower stopper member 1 and the upper stopper member 3. The other end of the positioning piece 5 in the vertical direction is fitted into a recess 6 provided in the other of the lower stopper member 1 and the upper stopper member 3, so that the lower stopper member 1 and the upper stopper member By performing relative positioning in the lateral direction with respect to the member 3, a predetermined structural expansion/contraction allowable gap L can be secured between the upward protrusion 2 and the downward opening recess 4, and furthermore, the structural concrete It is possible to prevent the upper stopper member 3 from being displaced in the lateral direction relative to the lower stopper member 1 due to vibrations, impacts, etc. during driving, and since the positioning piece 5 is made of rubber, , the resistance to expansion and contraction of the structure 22 is small, so that effects such as the ability to freely expand and contract the structure 22 can be obtained.

[Brief explanation of the drawing]

Figures 1 to 8 show one embodiment of the present invention, in which Figure 1 is a partially longitudinal front view showing the installed state of the stopper device for restricting the movement of structures, and Figure 2 is the stopper device for restricting the movement of structures. A plan view of the device, FIG. 3 is a bottom view of the stopper device, and FIG. 4 is a line taken along A-A in FIG.
5 is a sectional view taken along the line B-B in FIG. 2, FIG. 6 is a plan view of the lower stopper member with the positioning piece, FIG. 7 is a bottom view of the upper stopper member, and FIG. 8 is the vicinity of the positioning piece. FIG. 2 is an enlarged longitudinal sectional side view. FIG. 9 is a vertical cross-sectional side view showing a state in which the positioning piece is deformed due to the movement of the upper stopper member due to the expansion and contraction of the structure, and FIG. 10 is a longitudinal side view showing the positioning piece deformed due to the movement of the upper stopper member due to the large movement of the upper stopper member. FIG. 7 is a vertical cross-sectional side view showing a state where the member is sliding on the lower surface. FIG. 11 is a longitudinal sectional side view showing a state in which the lower part of the positioning piece is fixed with an adhesive. DESCRIPTION OF SYMBOLS 1... Lower stopper member, 2... Upward protrusion for locking, 3... Upper stopper member, 4... Downward opening recess for locking, 5... Rubber positioning piece, 6...
Recessed portion, 9... Lower anchor member, 11... Recessed portion, 1
3...Washer, 15...Fixing screw, 18...Upper anchor member, 21...Temporary fixing screw, 22...Structure, 23...Support structure, G...Gap, L...
Allowable gap for structure expansion and contraction.

Claims (1)

[Scope of utility model registration request] An upward protrusion 2 for locking is integrally provided on the upper surface of the lower stopper member 1 fixed to the support structure, and a downward opening recess 4 for locking is provided on the lower surface of the upper stopper member 3 fixed to the structure. In the stopper device for restricting movement of a structure in which the upward protrusion 2 is disposed in the downward opening recess 4, a portion around the upward protrusion 2 and the downward opening recess 4 is provided between the lower stopper member 1 and the upper stopper member 3. , three or more rubber positioning pieces 5 are arranged, one end of the positioning piece 5 in the vertical direction is fixed to one of the lower stopper member 1 and the upper stopper member 3, and the vertical end of the positioning piece 5 is fixed to one of the lower stopper member 1 and the upper stopper member 3. The other end is fitted into a recess 6 provided in the other of the lower stopper member 1 and the upper stopper member 3, and a gap G is provided between the upper surface of the lower stopper member 1 and the lower surface of the upper stopper member 3. There is a structure expansion/contraction allowable distance L between both longitudinal ends of the structure in the downward opening recess 4 and the upward protrusion 2.
A stopper device for restricting movement of a structure, characterized in that it is provided with a.