JPH0756326Y2 - Buffer type spherical bearing - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application This invention is applicable to, for example, roof beams for construction, bridges, corridors,
The present invention relates to a cushion type spherical bearing that supports an arched beam of a dome structure.

(B) Conventional Technology Conventionally, there is a spherical bearing as shown in FIG.

The spherical bearing 1 has a flat upper surface and a lower spherical surface between a lower shoe 3 fixed to the lower work 2 and an upper shoe 5 fixed to the upper work 4, and A stopper which interposes a spherical seat 6 integrally formed with a restriction protrusion loosely fitted in a hole on the lower shoe 3 side at the center of the lower surface of the spherical surface, and which faces the side surface of the lower shoe 3 with a predetermined distance from the peripheral surface of the upper shoe 5. The structure in which 7 is erected is provided, and for example, with respect to the movement in the sliding direction due to the occurrence of an earthquake, the movement is blocked by the contact between the stopper 7 and the side surface of the lower shoe 3.

(C) Problems to be solved by the invention However, in the case of the bearing structure as described above, when the vibration of the earthquake acts on the stopper 7 as an impact force, a stress exceeding the theoretical calculated value is generated and the member is destroyed. In addition, when the superstructure 4 has a truss structure, there is a problem in that the impact force also acts on the bolt fastening portion that fastens the truss structure, which may cause structural damage.

Therefore, the present invention can absorb the impact force in the sliding direction as described above, can also allow the movement displacement due to the temperature change of the upper frame, and in addition, the spherical surface caused by the large deviation applied from the outside. An object of the present invention is to provide a cushioning type spherical bearing that can prevent sliding and improve construction accuracy and workability.

(D) Means for Solving the Problems This invention is a spherical bearing having a spherical seat interposed between a lower shoe and an upper shoe, and facing each other in the sliding direction between the lower shoe and the upper shoe. A cushioning member is provided on the sliding direction side of the facing portion, a hollow portion is formed in the center of the upper surface of the lower shoe, and a regulation projection is formed in the center of the lower surface of the spherical seat. It is characterized in that the projection is a buffer type spherical bearing fitted in the hollow portion.

(E) Action The shock-absorbing spherical bearing of the present invention, when a shock in the sliding direction acts between the lower shoe and the upper shoe, the shock force can be buffered by the buffer member interposed therebetween. It is also possible to absorb the displacement in the same direction.

In addition, it is possible to prevent the spherical seat from sliding beyond the permissible range due to a large deviation applied from the outside by the restriction projection fitted in the hollow portion.

(F) Effect of the invention As a result of the above, according to the invention, even if the vibration of the earthquake acts as an impact force on the spherical bearing, it damps it, so that the supported member supported by this spherical bearing is damaged. It is possible to prevent the above, and it is also possible to absorb the movement displacement between the lower and upper shoes.

In addition, since the regulation protrusion that regulates the spherical movement is formed in the center of the lower surface of the spherical seat, and the hollow portion is formed in the center of the upper surface of the lower shoe corresponding to this regulation protrusion, the spherical sliding is caused by the large deviation applied from the outside. This has the effect of preventing movement.

That is, in the dome structure, an arch-shaped beam is constructed on the upper part of the bearing, but generally the beam is inclined in the direction accompanied by rotational sliding during the construction. In the invention of the present application, since the regulating projection for regulating the spherical movement is formed at the center of the lower surface of the spherical seat that rotates and slides (spherical movement), and the hollow portion is formed at the center of the upper surface of the lower shoe corresponding thereto. By adjusting the dimensions of the restriction protrusion and the hollow part, the allowable tilt can be set in advance, and as a result, the final tilt adjustment work after the beam is constructed is This is possible within the range, and there is an effect that the construction accuracy can be improved and the workability can be improved.

(G) Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

The drawings show a cushion type spherical bearing, and in FIGS. 1, 2 and 3, this cushion type spherical bearing 10 has a lower shoe 11 and an upper shoe.
12, a spherical seat 13 interposed therebetween, a cushioning spring 14, and various members for assembling these.

The above-mentioned lower shoe 11 is formed in a square shape, and the above-mentioned spherical seat is formed on the upper surface.
A spherical seating surface on which 13 is placed is formed, and a hollow portion 15 having a cylindrical shape is formed at the center thereof, which is placed on the upper surface of the substructure 16 and the periphery thereof is fixed by welding. The above-mentioned hollow portion 15 is for loosely fitting a regulation projection 17 described later, and
Of course, it may be formed only in the center of the upper surface of the.

The lower surface of the spherical seat 13 is formed in a spherical shape having a shape corresponding to the spherical seat surface of the lower shoe 11, and a restricting protrusion 17 for restricting spherical movement is formed in the central portion thereof, and a sliding member 18 is formed. It is placed on the lower shoe 11 with the interposition and the regulation protrusion 17 is provided in the hollow portion 15.
Fit in.

Further, the upper surface is formed in a flat shape, and the upper shoe 12 on which the upper part is placed is placed with the sliding member 18 interposed.

The upper shoe 12 described above is formed in a quadrangle larger than the lower shoe 11 described above, and a step portion 19 projecting downward is formed at the peripheral edge portion on the lower surface side.

A sliding direction X is set for the upper shoe 12 described above, and parallel opposite sides that intersect the sliding direction X guide the slide of the upper shoe 12.

That is, the guide members 20, 20 having an L-shaped cross section are fastened and fixed to the inside of the guide-side stepped portion 19 with bolts 21 ..., and the shim plate 22 is provided at the contact-side end portion of the guide members 20, 20. Is fixed to contact the side surface of the lower shoe 11 and guides the slide of the lower shoe 11.

The holding member 2 is provided inside the step portion 19 on the X side in the sliding direction.
3, 23 are fastened and fixed by bolts 24, a shim plate 25 is fixed inside the holding members 23, and the holding member 23 and the shim plate 25 have a contact member 26.
A bolt 27 planted on the back surface of the same is slidably penetrated, and a lock nut 28 is set and held at a predetermined length.

The above-mentioned contact member 26 has a rectangular plate shape, and a sliding member 29 is adhesively fixed to the entire surface of the lower shoe 11 which contacts the side surface of the lower shoe 11, and the above-mentioned bolt 27 is attached to the rear surface of the sliding member 29 in this embodiment. A book is planted, and the buffer spring 14 is interposed between the contact member 26 and the shim plate 25 on the axis of the bolt 27.

Further, in this embodiment, three stoppers 30 are fixed on the back surface of the contact member 26 and between the aforementioned cushioning springs 14, and these stoppers 30 are the shim plates 25 of the holding member 23. By acting with a certain distance between
The amount of movement in the slide direction is regulated.

Then, the periphery of the lower end of the superstructure 31 is fixed to the upper surface of the upper shoe 12 by welding.

The operation of the cushioning type spherical bearing 10 configured as above will be described below.

Since the sliding direction X is set in this cushion type spherical bearing 10, it is used for bearings of a structure in which the relative moving direction of the substructure 16 and the superstructure 31 is predetermined in one direction, such as a bridge, The cushioning type spherical bearing 10 is attached and fixed in correspondence with the sliding direction X of the moving direction.

When a relative movement occurs between the lower shoe 11 and the upper shoe 12 in the sliding direction X, the guide member 20 guides the mutual movement, and the contact member 26 located in the sliding direction X serves as a buffer. By moving against the spring 14, relative movement is allowed and movement displacement is possible, and when movement occurs shockly, that is, when an impact force is applied in the sliding direction X, this is buffered. Buffer with spring 14.

Further, the inclination of the superstructure 31 is allowed by the spherical sliding of the spherical seat 13, and this spherical sliding is allowed within the moving range of the restriction protrusion 17 in the hollow portion 15.

As described above, according to this embodiment, even if the vibration of the earthquake acts on the spherical bearing 10 as an impact force, it is buffered by the buffer spring 14, so that the bearing supported by the spherical bearing 10 is supported. It is possible to prevent damage to the members, and
It is also possible to absorb the movement displacement between 11 and upper shoe 12.

Moreover, since the regulation protrusion 17 that regulates the spherical movement is formed in the center of the lower surface of the spherical seat 13, and the cylindrical hollow portion 15 is formed in the center of the lower shoe 11 corresponding to this regulation protrusion 17, a large external force is added. There is an effect that spherical surface sliding can be prevented due to the deviation.

That is, in the dome structure, an arch-shaped beam is constructed on the upper part of the bearing, but generally the beam is inclined in the direction accompanied by rotational sliding during the construction. According to the present invention, a restricting protrusion 17 for restricting the spherical movement is formed in the center of the lower surface of the spherical seat 13 that rotates and slides (spherical movement), and a cylindrical hollow portion 15 corresponding to this is formed in the center of the lower shoe 11. Since it has been formed,
By adjusting the dimensions of 17 and the hollow portion 15, it is possible to set the allowable inclination in advance, and as a result, the final inclination adjustment work after building the beam is within the range of the above design allowable values. It is possible to improve the construction accuracy and the workability as well.

In the above-described embodiment, the example in which the slide direction X is set to one direction is shown, but even when the slide direction X is set to two directions, the buffer spring 14 is interposed in the same manner as described above, and Can buffer the direction.

Further, although a spring is shown as the cushioning member in the above-mentioned embodiment, it can be freely selected as long as it has a cushioning function according to the application of the bearing, and the hollow portion 15 is cylindrical in shape. It need not be provided, and it may be formed only in the center of the upper surface of the lower shoe 11, and the present invention is not limited to the configuration of the above-described embodiment only.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view showing a cushioning type spherical bearing of the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is line BB in FIG. FIG. 4 is a cross-sectional view of the conventional spherical bearing. 11 …… Lower shoe, 12 …… Upper shoe 13 …… Spherical seat, 14 …… Cushion spring 15 …… Hollow part, 17 …… Regulation protrusion

Claims (1)

[Scope of utility model registration request] 1. A spherical bearing in which a spherical seat (13) is interposed between the lower shoe (11) and the upper shoe (12), and between the lower shoe (11) and the upper shoe (12). A facing portion facing the sliding direction (X) is formed on the lower portion, and a cushioning member (14) is interposed on the sliding direction (X) side of the facing portion. ) Is formed, and a regulation projection (17) is formed at the center of the lower surface of the spherical seat (13), and the regulation projection (17) is fitted into the hollow portion (15).