JP2000274484A - Stopper device for limiting movement of structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a bridge and other structure from falling out from an abutment, a pier, and other support structure. SOLUTION: A plurality of positioning member 5 made of rubber are arranged between lower and upper stopper members 1 and 3 at the peripheries of an upward protrusion 2 and a downward opening recessed part 4. The positioning member 5 made of rubber comprises a lower positioning piece 5a made of rubber having an upper Teflon layer fixed on the upper surface of a rubber plate placed on the upper part of the lower stopper member 1, and an upper positioning piece 5f made of rubber where a lower Teflon layer is integrally fixed on the under surface of the rubber plate situated at the lower part of the upper stopper member 3. Further, the lower Teflon layer at the upper positioning piece made of rubber is situated in a polymerized manner on the upper surface of the upper Teflon layer of the lower positioning piece 5a made of rubber and a gap is provided between the upper surface of the lower and upper stopper members 1 and 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stopper device for restricting the movement of a structure for preventing a bridge or other structure from falling from an abutment, a pier or other supporting structure due to a strong horizontal seismic force. It is.

[0002]

2. Description of the Related Art Generally, even if an unexpected earthquake occurs, a bridge such as a bridge does not eventually lose its girder, and it is required to ensure safety in an emergency. For this purpose, various types of bridge-prevention devices such as stoppers for restricting the movement of structures have been developed. However, stoppers for restricting the movement of structures are generally limited to the limit values of load-bearing devices that support the load of the upper structure. Since it is an emergency member that functions for the first time when the load exceeds the limit, it is required that the functions of the load bearing devices are not hindered at all times during an assumed earthquake. As one example, one of the movement limiting stopper devices for preventing a structure such as a bridge conventionally supported by a rubber bearing from dropping from a supporting structure such as an abutment or a pier due to a strong horizontal seismic force. An upper projection for locking is integrally provided at the center of the upper surface of the lower stopper member fixed to the upper portion of the support structure, and is locked to the central portion of the lower surface of the upper stopper member fixed to the lower portion of the structure. There is known a structure in which a downward opening concave portion is provided, the upward projection is arranged in the downward opening concave portion, and a gap that allows expansion and contraction of the structure is provided between the upward projection and the downward opening concave portion. .

When installing a stopper device having this structure,
First, the lower portion of the lower stopper member is embedded and fixed in the upper portion of the concrete support structure, and then a concrete structure construction formwork is assembled and concrete for the upper structure is poured.
When assembling the formwork, if the relative position of the upper anchor member and the lower anchor member in the horizontal direction is incorrect, concrete for the structure will be poured in that state, so the installed stopper device There is a problem that a structure expansion allowable gap of a predetermined size is not formed between the upward projection and both ends of the structure of the downward opening concave portion in the longitudinal direction of the structure, which hinders expansion and contraction of the structure due to a temperature change or the like. . Also, if a certain gap or more is not provided between the upper surface of the lower stopper member and the lower surface of the upper stopper member, when the structure bends, the upper stopper member abuts against the lower stopper member, so that the structure is rubberized. There is a problem that the bearing cannot elastically support the bearing, and also has an adverse effect on the expansion and contraction of the structure.

[0004] As a known technique which has solved the above problems,
JP-A-60-62520 and JP-A-3-199.
As disclosed in Japanese Patent Publication No. 514, a rubber bearing is used for temporarily supporting the movement restricting device between an upper stopper member fixed to a structure such as a girder and a supporting structure as a lower structure. Elastic bodies that are softer and hardly support the load of superstructures such as girders have been used. Also,
As shown in FIG. 20, a positioning member 14 made of synthetic resin or the like is fitted in each of the recesses 13a and 13b of the upper stopper member 3 and the lower stopper member 1, and the positioning member 14 is used for large deformation during a large earthquake. There is also known a type in which shear fracture occurs.

[0005] However, when the shear fracture occurs, there is a problem that the debris escapes. In order to easily move the fragment, a positioning member having a structure as shown in FIG. 21 is conceivable. In the case of this structure, the elastic body 15
Low friction materials 26a, 26b are fixed to both front and back surfaces of the steel stopper members 1, 3 and the contact surfaces of the upper and lower steel stopper members 1, 3 which come into contact therewith are subjected to surface treatment. It is necessary to perform the surface treatment of No. 3 and there is a problem that the processing is complicated. Like the conventional positioning member, both or one of the upper and lower end surfaces is made of a material having low friction (PT).
In the method in which the FE or the like is stretched and slides on the metal surfaces of the stopper members 1 and 3 which are in contact with both or one of the lower and upper end surfaces, it is necessary to perform a metal surface treatment of the contact portion.

[0006] If the metal is treated to prevent rust as a surface treatment, slippage may be unnecessarily large, obstructing functions such as constant operation, or applying a constant load to the device. In addition, in the case of the conventional positioning member, since the upper and lower surfaces are slid due to contact with metal, it is difficult to know whether the upper surface or the lower surface is slid. Sliding on the bearing surface of the member 1 in the lateral direction, and by accumulating the sliding movement,
The equipment may fall off and fall under the bridge.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a stopper for restricting the movement of a structure which can easily solve the above-mentioned problems. The present invention corrects the above-mentioned drawbacks of the prior art by preventing lateral sliding movement on the bearing surface of the lower stopper member 1 and thus preventing accumulation of the sliding movement.
It fulfills its original purpose. In order to prevent the sliding surface of the contact surface with the steel stopper member from sliding, a contact portion that slides at a location separate from the sliding surface of the steel stopper member is provided, and the friction coefficient μ = 0. 05-
An object of using an elastic material (rubber material) having a friction coefficient higher than that of a material of about 0.15 is achieved, and the load of the upper structure is hardly supported by the elastic material. Further, the rubber positioning member used in the present invention is made of a material in which one side of each rubber positioning piece is superimposed by a pair of rubber positioning pieces, so that the sliding friction coefficient of the sliding surface is reduced. . The other surface is in contact with the stopper member, and by using an elastic material having a higher coefficient of friction than the sliding surface, the moving surface can be reliably specified. By doing so, the danger of falling off and the like is reduced, and the danger at the time of falling can be reduced because the rubber positioning pieces constituting the rubber positioning member used in the present invention are all lightweight elastic bodies. . Further, each rubber positioning piece can be fixed to each upper and lower stopper member by an adhesive.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, an upwardly engaging projection 2 is integrally provided on an upper surface of a lower stopper member 1 fixed to a support structure. Upper stopper member 3 fixed to a structure
In the stopper device for restricting the movement of a structure in which a downward opening concave portion 4 for locking is provided on the lower surface of the upper surface and the upward projection 2 is disposed in the downward opening concave portion 4, the lower stopper member 1 and the upper stopper member 3 Between the upward projections 2
A plurality of rubber positioning members 5 are arranged around the downward opening concave portion 4, and the rubber positioning members 5 are mounted on the upper portion of the lower stopper member 1.
b, a rubber lower positioning piece 5a having an upper Teflon layer 5c fixed to the upper surface thereof, and a rubber upper positioning piece 5f having a lower Teflon layer 5d integrally fixed to a lower surface of a rubber plate 5e disposed below the upper stopper member 3. The lower Teflon layer 5c of the rubber upper positioning piece 5f is disposed so as to overlap the upper surface of the upper Teflon layer 5c of the rubber lower positioning piece 5a, and the upper surface of the lower stopper member 1 and the upper stopper member 3 is provided with a gap G between itself and the lower surface. Further, the invention according to claim 2 is characterized in that a structure extension allowable gap L is provided between both ends in the longitudinal direction of the structure in the downward opening concave portion 4 and the upward projection 2. Further, in the invention of claim 3, both ends in the vertical direction of the positioning member 5 are fixed to the lower stopper member 1 and the upper stopper member 3, respectively. Claim 4
The invention is characterized in that both ends in the vertical direction of the positioning member 5 are fitted into the concave portions 6 provided in the lower stopper member 1 and the upper stopper member 3.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described based on the illustrated embodiment. FIGS. 11 and 15 show the first and second embodiments of the rubber positioning member 5 used in the embodiment of the present invention, and show the upper surface of a circular or rectangular soft or hard rubber plate 5b. A rubber lower positioning piece 5a in which an upper Teflon layer 5c made of an ethylene tetrafluoride plate or layer is integrally fixed by an adhesive or integral molding or the like, and a lower surface of a soft or hard rubber plate 5e, A rubber upper positioning piece 5f in which a lower Teflon layer 5d made of a plate or a layer is integrally fixed by an adhesive or integral molding or the like is combined with the upper Teflon layer 5c.
The lower Teflon layer 5d is placed so as to be superimposed on the upper surface of the base member, and the rubber positioning pieces 5a and 5f are placed on the contact surfaces of the rubber positioning pieces 5a and 5f so as to be relatively slidable (movable) in the lateral direction. A rubber positioning member 5 is configured.
FIGS. 1 to 10 show a first embodiment of the present invention, in which a plurality of ribs 7 and a plurality of female screw cylinders 8 are integrally provided below a steel lower stopper member 1, and the female screw cylinder 8 is provided. A male screw portion at the upper end of a lower anchor member 9 made of a steel rod is screwed into the lower anchor member 9 or the upper end of the lower anchor member 9 is fixed to the female screw cylinder 8 by welding. An upward projection 2 for locking having a circular cross section is integrally provided at the center of the upper surface of the lower stopper member 1 and a lower surface 19 of the upper stopper member 3 made of steel. Around
Fourteen rubber positioning members 5 as shown in FIG. 11 or FIG. 15 are arranged, the lower surface of the rubber positioning member 5 is placed on the upper surface of the lower stopper member 1, and four female screw holes 12 for screwing screws. Are provided at intervals in the circumferential direction of the protrusion, the lower part of the rubber lower positioning piece 5a is mounted on the upper surface of the lower stopper member 1, and the upper part of the rubber upper positioning piece 5f of the rubber positioning member 5 Is in contact with the lower surface of the upper stopper member 3, and the upper and lower portions of the rubber positioning member 5 are in contact with the upper surface of the lower stopper member 1 and the lower surface of the upper stopper member 3, respectively. By arranging the rubber positioning member 5 as described above, the coefficient of friction between the steel stopper members 1 and 3 and the rubber plates at the rubber positioning pieces 5a and 5f is:
Since it is larger than the friction coefficient of the contact portion between the Teflon layers in the rubber positioning pieces 5a and 5f, there is no danger of relative movement between the lower steel stopper member 1 and the rubber lower positioning piece 5a. When the upper steel stopper member 3 and the rubber upper positioning piece 5f are in contact with each other, there is no danger that they will relatively move laterally.

A plurality of ribs 16 and a plurality of female screw cylinders 17 are integrally provided on the upper portion of the steel upper stopper member 3,
A male screw portion at a lower end of an upper anchor member 18 made of a steel rod having a flange at an upper end is screwed into the female screw tube 17,
The upper anchor member 18 is fixed to the female screw cylinder 17 by welding, and the lower surface 19 of the upper stopper member 3 is further fixed.
In the center, there is provided an oval downward opening recess 4 for locking extending in the longitudinal direction of the structure. Further, the upper stopper member 3 is provided with four screw insertion through-holes 20 corresponding to the female screw holes 12 around the downward opening concave portion 4.

The lower surface of the upper stopper member 3 is mounted on the upper surface of the rubber upper positioning piece 5f of the rubber positioning member 5 mounted on the upper surface of the lower stopper member 1, and the upper surface 10 of the lower stopper member 1 A gap G is provided between the upper stopper member 3 and the lower surface 19, and a screw 21 for temporary fixing inserted through the through hole 20 is screwed into the female screw hole 12. The stopper member 1 and the upper stopper member 3 are temporarily joined so as not to be separated from each other, and a structure expansion / contraction allowable gap L is provided between both ends of the downward opening recess 4 in the longitudinal direction of the structure and the upward projection 2. ing.

When installing the stopper device of the above-described embodiment, first, the lower anchor member is provided with the downward opening concave portion 4 of the stopper device arranged so as to extend in the longitudinal direction of a structure 22 such as a concrete bridge girder to be constructed. 9 and the lower part of the lower stopper member 1 are embedded and fixed in a concrete support structure 23 such as a bridge or an abutment. Next, a groove-shaped formwork 24 for building the structure 22 is assembled, and the upper stopper member 3 is fitted into an opening provided in the bottom plate of the formwork 24, and then the temporary fixing screws 21 are removed. Next, concrete for a structure is poured into the formwork 24.

At the side of the stopper device, a rubber bearing for supporting the load of the structure is provided between the support structure 23 and the structure 22. Since the structure expansion / contraction allowable gap L is provided between both ends of the downward opening concave portion 4 and the upward projection 2 in the stopper device, the structure 22 can freely expand and contract. In addition, the structure 2 due to the strong horizontal seismic force
When the second member 2 attempts to move largely, the movement of the structure 22 is restricted by the engagement between the upward projection 2 and the downward opening concave portion 4. When the amount of lateral movement of the upper stopper member 3 with respect to the lower stopper member 1 is relatively small, the rubber upper positioning piece 5f and the rubber lower positioning piece 5f of the rubber positioning member 5 are relatively positioned as shown in FIG. When the lateral movement of the upper stopper member 3 with respect to the lower stopper member 1 becomes more than a certain value, the rubber member is made of rubber, as shown in FIG. As shown in FIG. 13, in order to prevent the rubber upper positioning piece 5f from dropping, the rubber upper and lower positioning pieces 5a, 5f of the positioning member 5 lose contact with the Teflon layers 5c, 5d. The upper stopper member 3 is provided with a rubber upper positioning piece 5.
The upper end of f may be fixed with an adhesive, and the lower end of the rubber lower positioning piece 5a may be fixed to the lower stopper member 1 with an adhesive.

A concave portion is provided on the lower surface of the upper stopper member 3, and the upper end portion of the rubber upper positioning piece 5f is engaged with the concave portion by press-fitting, and a concave portion is formed on the upper surface of the lower stopper member 1. Alternatively, the lower end of the rubber lower positioning piece 5f may be engaged with the recess by press-fitting. Further, the number of the rubber positioning members 5 is provided so as to be scattered in the embodiment,
When each of the rubber positioning pieces 5a and 5f is formed as a rectangular annular member continuous around the locking downward opening recess 4,
The stopper members 1 and 3 may be arranged in a front and rear direction or a left and right direction in the case of a long strip shape. If they are to be provided, the number may be four or five or more, and the number of temporary fixing points by the temporary fixing screws 21 may be two or more. Furthermore, one end (upper end) or both ends of the cylindrical rubber positioning member 5 may be fitted into the concave portion of the lower stopper member 1 or the concave portion of the upper stopper member 3 and fixed by the adhesive 25.

In the case of the above embodiment, one end of the rubber upper positioning piece 5f and the rubber lower positioning piece 5a of the rubber positioning member 5 is configured to abut on each of the upper stopper member 3 and the lower stopper member 1. The coefficient of friction between rubber and metal (steel) (μ ≧ 0.3)
Is the coefficient of friction between Teflon and Teflon (μ = 0.05-
0.15), the lower surface of the rubber plate 5b of the rubber lower positioning piece 5a is simply placed on the upper surface of the lower stopper member 1, and the upper surface of the rubber plate 5e of the rubber upper positioning piece 5f is connected to the upper stopper member. 3, the rubber upper and lower positioning pieces 5f, 5a and the upper and lower stopper members 1, 3 do not slide relative to each other, so that the contact between the Teflon layers 5c, 5d does not occur. You can slide on the part.

When the present invention is carried out, when the downward opening recess 4 for locking is provided on the lower surface of the upper stopper member 3, both ends in the bridge axis direction are opened and locked only in the direction perpendicular to the bridge axis. You may make it comprise as the downward opening recessed part 4 for locking.

When implementing the present invention, FIGS.
As shown in FIG. 9, a plurality of circular recesses 11 are provided on the upper surface of the lower stopper member 1 around the upward protrusion 2, and the recesses 6 are spaced from the lower surface of the upper stopper member 3 in the peripheral direction of the protrusion so as to face the recesses 11. The lower part of the rubber lower positioning piece 5a is fitted in the recess 11 of the lower stopper member 1, and the upper part of the rubber upper positioning piece 5f of the rubber positioning member 5 is connected to the upper stopper member. The upper and lower portions of the positioning member 5 may be engaged with the lower stopper member 1 and the upper stopper member 3, respectively. Further, the upper and lower portions of the positioning member 5 may be fitted into the recesses 11 and 6 and fixed by an adhesive. In this case, as described above, the lower surface 19 of the upper stopper member 3 is provided with four circular recesses 6 that match the recesses 11 around the downward opening recesses 4.

[0018]

According to the present invention, with the lower stopper member 1 fixed to the support structure 23, the upper stopper member 3
When concrete for a structure is cast so as to embed the upper part of the upper stopper member 1, the lower stopper member 1 and the upper stopper member 3 are arranged around the upward projection 2 of the lower stopper member 1 and the downward opening recess 4 of the upper stopper member 3. With the rubber positioning member 5 provided, the lower stopper member 1 and the upper stopper member 3 can be vertically positioned relative to each other, and the upper surface 10 of the lower stopper member 1 and the lower surface 19 of the upper stopper member 3 can be positioned. A required gap G can be secured between the rubber positioning member 5 and the rubber positioning member 5.
Is composed of a rubber upper positioning piece 5f and a rubber lower positioning piece 5a, and the contact portions of the upper and lower positioning pieces 5a and 5f are formed through a Teflon layer. At the contact portions between the upper and lower stopper members 5a, 5f and the upper and lower stopper members 1, 3, the upper and lower stopper members follow the upper and lower stopper members without causing relative displacement, and these upper and lower gaps are removed. Until the upper stopper member 1 is permanently supported by the construction of the object, it can be temporarily temporarily held.

The positioning pieces 5a and 5f are mainly made of rubber. However, the positioning pieces 5a and 5f do not use the deformation resistance of the rubber material, but have a low coefficient of sliding friction at the contact portions of the positioning pieces 5a and 5f. Since the part is used, the structure 22
And the structure 22 can be freely expanded and contracted.

Further, the relative positioning of the lower stopper member 1 and the upper stopper member 3 in the horizontal direction is performed by the frictional resistance between the Teflon layers of the positioning pieces 5a and 5f, so that the upward projection 2 and the downward opening recess 4 are formed. A predetermined gap L between the structures can be secured between the upper stopper member 3 and the lower stopper member 1 due to vibration, impact or the like when the concrete for the structure is poured. Such an effect can be obtained that the lateral displacement can be prevented by the frictional resistance between the Teflon layers.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal front view showing a state in which a stopper device for restricting structure movement according to an embodiment of the present invention is installed.

FIG. 2 is a plan view of the stopper device shown in FIG.

FIG. 3 is a bottom view of the stopper device shown in FIG.

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is a sectional view taken along line BB of FIG. 2;

FIG. 6 is a plan view of a lower stopper member in a state where a rubber lower positioning piece is arranged.

FIG. 7 is a bottom view of the upper stopper member in a state where a rubber upper positioning piece is arranged.

FIG. 8 is an enlarged longitudinal side view showing the vicinity of a positioning member.

FIG. 9 is a longitudinal sectional side view showing a state where a positioning piece is displaced by movement of an upper stopper member based on expansion and contraction of a structure.

FIG. 10 is a vertical cross-sectional side view showing a state in which the positioning pieces are out of contact with each other due to a large movement of an upper stopper member.

FIG. 11 is a perspective view showing a rubber positioning member.

FIG. 12 is an exploded perspective view showing a rubber positioning member.

FIG. 13 is a vertical sectional side view showing a state where upper and lower positioning pieces made of rubber are fixed to respective stopper members by an adhesive.

14 is a vertical sectional side view showing a state in which a positioning piece is displaced by movement of an upper stopper member based on expansion and contraction of a structure when the rubber positioning member shown in FIG. 13 is used.

FIG. 15 is a perspective view showing another embodiment of a rubber positioning member.

16 is an exploded perspective view showing the rubber positioning member shown in FIG.

FIG. 17 is a partially longitudinal front view showing a state where a structure movement restricting stopper device of another embodiment used in the present invention is installed.

18 is a plan view of a lower stopper member in a state where a rubber lower positioning piece in FIG. 17 is arranged.

FIG. 19 is a bottom view of the upper stopper member in a state where the rubber upper positioning piece in FIG. 17 is arranged.

FIG. 20 is a longitudinal sectional front view showing an example of a structure in which a stopper member is temporarily supported by using a conventional positioning member.

FIG. 21 is a longitudinal sectional front view showing another example of a structure in which a stopper member is temporarily supported by using a conventional positioning member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower stopper member 2 Locking upward protrusion 3 Upper stopper member 4 Locking downward opening concave part 5 Rubber positioning member 5a Rubber lower positioning piece 5b Rubber plate 5c Upper Teflon layer (or plate) 5d Lower Teflon layer (or plate) 5e rubber plate 5f rubber upper positioning piece 6 concave portion 7 rib 8 female screw cylinder 9 lower anchor member 10 upper surface 11 concave portion 12 female screw hole for screwing 13a concave portion 13b concave portion 14 positioning member 15 elastic member 16 rib 17 female screw cylinder 18 upper anchor member 19 Lower surface 20 Screw insertion through hole 21 Temporary fixing screw 22 Structure 23 Support structure 25 Adhesive 26a Low friction material 26b Low friction material G Gap L Structure expansion / contraction allowable gap

Claims (4)

[Claims] An upper projection for locking is integrally provided on an upper surface of a lower stopper member fixed to a support structure, and a lower opening recess for locking is provided on a lower surface of an upper stopper member fixed to a structure. In the stopper device for restricting movement of a structure in which the upward projection is disposed in the downward opening recess, a rubber positioning member is provided between the lower stopper member and the upper stopper member around the upward projection and the downward opening recess. Are disposed, and the rubber positioning member is a rubber lower positioning piece in which an upper Teflon layer is fixed to an upper surface of a rubber plate placed on the upper portion of the lower stopper member, and a rubber disposed below the upper stopper member. A rubber upper positioning piece having a lower Teflon layer integrally fixed to the lower surface of the plate, and an upper Teflon layer in the rubber lower positioning piece. A structure in which a lower Teflon layer of a rubber upper positioning piece is arranged on the upper surface so as to overlap, and a gap is provided between an upper surface of the lower stopper member and a lower surface of the upper stopper member. Stopper device. 2. The structure movement restricting device according to claim 1, wherein a structure expansion / contraction allowable gap is provided between both ends in the longitudinal direction of the structure in the downward opening concave portion and the upward projection. Stopper device. 3. The upper and lower ends of the rubber positioning member in the vertical direction are fixed to the upper surface of the lower stopper member and the lower surface of the upper stopper member, respectively, by an adhesive. 4. The stopper device for structure movement restriction according to claim 1. 4. A stopper device for restricting movement of a structure, wherein both ends of a rubber positioning member in a vertical direction are fitted into concave portions provided in a lower stopper member and an upper stopper member.