JP2001012188A - Joint structure for hollow structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the breakage of an end section and to increase an aseismatic property by forming a recess on one faying face of the faying portion of a constituting member, forming a projection on the other faying face, and providing a rubber sheet on a faying face portion. SOLUTION: A projection 16 formed on the faying face 14 of an upper member 8 is fayed to a recess 12 formed on the faying face 10 of a side member 6 via a rubber sheet 18. The recess 12 allows the rocking action of the projection 16 by the prescribed rotation angle due to the difference in radius of curvature at this junction. When the rotation angle is increased, no stress is concentrated at an end section, and the breakage of the end section is prevented. Since the rubber sheet 18 is provided between the recess 12 and projection 16, the impact caused when the upper member 8 is rotated against the side member 6 by an earthquake is mitigated, and the abrasion between the end sections is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for a hollow structure, and more particularly, to a joint portion between a concave portion formed on one joint surface and a convex portion formed on the other joint surface. Swinging motion can be tolerated by the rotation angle of
Compared to conventional ones, it can increase the rotation angle, prevent damage to the end, and realize a joint with an earthquake-resistant structure by a rubber sheet interposed between the concave and convex parts,
The present invention relates to a joint structure of a hollow structure capable of reducing an impact.

[0002]

2. Description of the Related Art Hollow structures include a footing type having two side members and at least one upper member and an invert type having a lower member, two side members and at least one upper member. There is an inner curved surface.

[0003] The cross-sectional area of this hollow structure varies depending on the application. That is, for example, in an industrial hollow structure having a small cross-sectional area, it is used as a passage for carrying water or other fluid, a passage for traffic of pedestrians or vehicles, or a conduit for cable insertion.

A hollow structure having a large cross-sectional area is used, for example, for constructing a tunnel on an automobile road, and the cross-sectional area increases or decreases according to the lane.

Further, the hollow structure extends in the longitudinal direction while maintaining substantially the same cross-sectional area, and the extension length can be arbitrarily set.

[0006]

In a conventional hollow structure, an inner curved surface is formed by a footing type or an invert type.

At this time, when forming the hollow structure, the respective ends of the constituent members, for example, the side member and the upper member are formed in a straight line, and the respective ends formed in a straight line are connected to each other. After the contact, the side member and the upper member are fixed using a joint made of a fixing member such as a metal fitting.

However, since the respective ends of the side member and the upper member are formed in a straight line, the rotation of each member is not allowed, and each member rotates about the end. During operation, stress concentrates on the end portion, and the end portion may be damaged, which is disadvantageous in practical use.

[0009] Further, since no intervening member is provided between the respective ends of the side member and the upper member, the ends are simply connected by a joint. May cause wear between the ends due to the vibration of the earthquake, and the ends may be damaged in the end. It needed to be connected and an improvement was desired.

[0010]

According to the present invention, in order to eliminate the above-mentioned factors, in a hollow structure formed by joining a plurality of constituent members, a concave portion is formed on one joint surface at a joint portion of the constituent members. The joint is formed by forming a convex portion on the other joint surface and interposing a rubber sheet at the joint surface portion.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION
When constructing the hollow structure, the convex portion formed on the other joint surface is joined to the concave portion formed on one joint surface in the joint portion of the component members via a rubber sheet, and the concave portion and the convex portion In the joint part, the concave portion allows the swing operation by the predetermined rotation angle of the convex portion, increases the rotational angle as compared with the conventional one, prevents breakage of the end portion, and furthermore, between the concave portion and the convex portion. The interposed rubber sheet realizes a joint with an earthquake-resistant structure and reduces impact.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

1 to 5 show an embodiment of the present invention. In FIGS. 2 and 3, reference numeral 2 denotes a hollow structure.

The hollow structure 2 is formed into an inner curved surface shape by sequentially joining a plurality of constituent members.

The hollow structure 2 includes an invert type hollow structure 2A and a footing type hollow structure 2B.

As shown in FIG. 2, an invert type hollow structure 2A has a lower member 4A and two side members 6A-A.
1, 6A-2 and at least one, for example, one upper member 8A.

The footing type hollow structure 2B has two side members 6B-1 and 6B-2 and at least one, for example, one upper member 8B.

In the following description, "A" is used because the invert type hollow structure 2A and the footing type hollow structure 2B are common to each other.
Alternatively, the description will be made without adding the symbol “B”.

Further, the two side members are referred to as "6A-1, 6A".
A-2 "or" 6B-1, 6B-2 ", but only one side member will be disclosed in the enlarged view, and it will have a symmetrical configuration. Common description such as "member 6".

At this time, a concave portion (also referred to as a “ring joint concave portion”) 12 is formed in one joint surface 10 at a joint portion between the two side members 6 and one upper member 8 which are constituent members of the hollow structure 2. And a convex portion (also referred to as a “ring joint convex portion”) 16 is formed on the other joint surface 14, and a rubber sheet 18 is interposed between the joint surfaces 10 and 14 to form a joint 20. .

More specifically, as shown in FIG. 1, the one joint surface 10 is formed on the side surface member 6 and a concave portion 12 is formed on the joint surface 10 on the side member 6 side.

As shown in FIG. 1, the other joint surface 14 is formed on the upper member 8 and a projection 16 is formed on the joint surface 14 on the upper member 8 side.

A rubber sheet 18 is interposed between the joint surfaces 10 and 14 to form a joint 20.

At this time, the joining surface 10 on the side member 6 side
Recess 12 formed on the upper surface and the joining surface 14 on the upper member 8 side
In detail, as shown in FIG. 1, when forming the concave portion 12 in the joint surface 10 on the side surface member 6 side, as shown in FIG.
A concave portion 12 having a shape obtained by combining two curved surfaces is formed at a position facing −2 and up to approximately ／ of the thickness of the side surface member 6.

A flat portion 22 appears on the joint surface 10 on the lower portion 10-2 side of the concave portion 12.

The convex portion 16 is formed in a position and a shape substantially matching the concave portion 12.

Further, the rubber sheet 18 is formed in a sheet shape by a rubber material which is an elastic member, and is mounted in, for example, the concave portion 12 as shown in FIG.
2 is provided only at the formation location.

That is, the formation state of the concave portion 12 and the convex portion 16 will be described in more detail. As shown in FIG. 4, the thickness of the side member 6 and the upper member 8 is T, and the center of the side member 6 and the upper member 8 is T. When the line is C, the radius of curvature of the concave portion 12 is Rs, and the radius of curvature of the convex portion 16 is Rv (Rs> Rv), the center Os of the radius of curvature Rs of the concave portion 12 is the distance hs from the end of the side member 6. At the same time, the position is offset from the center of the thickness T by a distance e to the upper surface portion.

The center Ov of the radius of curvature Rv of the convex portion 16
At a distance hv (hs> hv) from the end of the side surface member 6 and offset by a distance e from the center of the thickness T to the upper surface portion.

Then, as shown in FIG. 4, the concave portion 12 is formed by combining the curved surface with the radius of curvature Rs at the center portion of the thickness T and the curved surface extending toward the upper portion 10-1 of the joint surface 10, and the thickness T is reduced. The convex portion 16 is formed by combining the curved surface at the center portion with the curvature radius Rv and the curved surface extending toward the upper portion 10-1 of the joint surface 10, and the concave portion 12 and the convex portion 16 come into contact with each other by about Rv / 2. Becomes

The dimensions of each part are determined by the thickness T of the side member 6 and the upper member 8 as shown in FIG.

Next, the operation will be described.

In constructing the hollow structure 2, after fixing the two side members 6, the upper member 8 is engaged and fixed on these side members 6.

That is, as shown in FIG. 1, the convex portion 16 formed on the joint surface 14 of the upper member 8 is joined to the concave portion 12 formed on the joint surface 10 of the side member 6 via the rubber sheet 18.

At this time, in order to prevent the joining portion from being disengaged, that is, to prevent the upper member 8 from dropping off, known fixing means such as bolts and nuts that allow a predetermined sliding amount may be used. .

The side member 6 and the upper member 8 swing due to an earthquake or the like.
Is rotated, at the joint portion between the concave portion 12 formed on the joint surface 10 of the side member 6 and the convex portion 16 formed on the joint surface 14 of the upper member 8, the concave portion 12 has a predetermined curvature due to the difference in the radius of curvature. The swing operation is permitted by the rotation angle.

The rubber sheet 18 interposed between the concave portion 12 formed on the joint surface 10 of the side member 6 and the convex portion 16 formed on the joint surface 14 of the upper member 8 is provided on the upper member 8 with respect to the side member 6. The shock when the 8 rotates is reduced.

Thus, the joining surface 10 of the side member 6
In the joint portion between the concave portion 12 formed on the joint member 14 and the convex portion 16 formed on the joint surface 14 of the upper member 8, the concave portion 12 is allowed to swing by a predetermined rotation angle of the convex portion 16 due to a difference in curvature radius. It is possible to increase the rotation angle as compared with the conventional one, and stress is not concentrated on the end portions of the side member 6 and the upper member 8, and there is no fear that the end portions are damaged. It is advantageous.

Further, the rubber sheet 18 is interposed between the concave portion 12 formed on the joint surface 10 of the side member 6 and the convex portion 16 formed on the joint surface 14 of the upper member 8, so that the joint 20 having an earthquake-resistant structure is provided. For example, when an earthquake or the like occurs, the shock when the upper member 8 rotates with respect to the side member 6 due to the vibration of the earthquake or the like can be reduced, and the wear between the ends can be reduced. Can be prevented, and there is no fear that the end is damaged.

Further, since the shapes of the concave portion 12 and the convex portion 16 are simple, the production is easy, the cost can be kept low, and it is economically advantageous.

Furthermore, since the concave portion 12 and the flat portion 22 formed on the joint surface 10 of the side member 6 are reliably partitioned by the boundary portion, the boundary portion prevents the convex portion 16 from dropping from the concave portion 12. And the convex portion 1
The upper member 8 forming 6 is less likely to fall off, which is practically advantageous.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously applied.

For example, in the embodiment of the present invention, while the concave portion is formed on the joint surface on the side member side and the convex portion is formed on the joint surface on the upper member side, the convex portion is formed on the joint surface on the side member side. While forming, a concave portion is formed on the joint surface on the upper member side, or a concave portion and a convex portion are formed on the joint surface on the side member side, and a convex portion and a concave portion are formed on the joint surface on the upper member side. It is also possible.

In the embodiment of the present invention, when the concave portion 12 is formed on the joint surface 10 on the side member 6 side and the convex portion 16 is formed on the joint surface 14 on the upper member 8 side, the concave portion 12 is formed.
Two curved surfaces are combined at a position extending from the upper part 10-1 to the lower part 10-2 of the joining surface 10 and up to about ／ of the thickness of the side surface member 6. As shown in FIG. 6, the joining surface 32 on the side surface member 6 side is formed in a planar shape, and a concave portion having a semicircular cross section is formed at a central portion of the joining surface 32, as shown in FIG. 34, the joining surface 36 on the upper member 8 side is formed in a planar shape, and a convex portion 38 having a semicircular cross section having a smaller radius of curvature than the concave portion 34 is formed at the center of the joining surface 36. You can also.

In the joint portion between the concave portion 34 formed on the joint surface 32 of the side member 6 and the convex portion 38 formed on the joint surface 36 of the upper member 8, the concave portion 34 is formed by the difference in the radius of curvature. The swing operation can be permitted only by a predetermined rotation angle of 38, the rotation angle can be increased as compared with the conventional one, and the stress is concentrated on the end portions of the side member 6 and the upper member 8. There is no fear that the end is damaged,
It is practically advantageous. Also, the joining surface 32 of the side member 6
If a rubber sheet is interposed between the concave portion 34 formed at the bottom and the convex portion 38 formed at the joint surface 36 of the upper member 8, a joint having an earthquake-resistant structure can be realized. For example, when an earthquake or the like occurs, The impact when the upper member rotates with respect to the side member due to an earthquake vibration or the like can be mitigated, wear between the respective ends can be prevented, and there is no fear that the ends are damaged. . Further, the concave portion 34 and the convex portion 38
Since the shape is simple, the production is easy, the cost can be kept low, and it is economically advantageous.

Further, in the embodiment of the present invention, when the concave portion 12 is formed on the joint surface 10 on the side member 6 side and the convex portion 16 is formed on the joint surface 14 on the upper member 8 side, the concave portion 12 is formed.
Two curved surfaces are combined at a position extending from the upper part 10-1 to the lower part 10-2 of the joining surface 10 and up to about ／ of the thickness of the side surface member 6. As shown in FIG. 7, the joint surface 42 on the side surface member 6 side is formed in a planar shape, and a concave portion having a semicircular cross section is formed at the center of the joint surface 42 as shown in FIG. 44, the joining surface 46 on the upper member 8 side is formed so as to be inclined so that the central portion protrudes toward the joining surface 42, and the radius of curvature is smaller at the central portion of the joining surface 46 than the concave portion 44. Projection 48 with semicircular cross section
Can also be formed.

In the joint portion between the concave portion 44 formed on the joint surface 42 of the side member 6 and the convex portion 48 formed on the joint surface 46 of the upper member 8, the concave portion 44 is formed by the difference in the radius of curvature. The swing operation can be permitted only by a predetermined rotation angle of 48, the rotation angle can be increased as compared with the conventional one, and stress is concentrated on the end portions of the side member 6 and the upper member 8. There is no fear that the end is damaged,
It is practically advantageous. Further, the joining surface 42 of the side member 6
If a rubber sheet is interposed between the concave portion 44 formed on the upper surface and the convex portion 48 formed on the joint surface 46 of the upper member 8, a joint having an earthquake-resistant structure can be realized. For example, when an earthquake or the like occurs, The impact when the upper member rotates with respect to the side member due to an earthquake vibration or the like can be mitigated, wear between the respective ends can be prevented, and there is no fear that the ends are damaged. . Further, the concave portion 44 and the convex portion 48
Since the shape is simple, the production is easy, the cost can be kept low, and it is economically advantageous.

As shown in FIG. 8, a trapezoidal concave portion 54 is formed on the joint surface 52 of the side member 6 and a concave portion 54 is formed on the joint surface 56 of the upper member 8 as shown in FIG. A smaller trapezoidal projection 58 can be formed, and as shown in FIG. 9, both joining surfaces 62 and 6 of the side member 6 and the upper member 8 can be formed.
The first and second concave portions 66 and 6 each having a semicircular cross-section
8 can be formed respectively, and a small-diameter rod-shaped member 70 can be interposed between the first and second concave portions 66 and 68.

In this case, substantially the same effects as those of the other first and second embodiments described above can be obtained.

[0050]

As described above in detail, according to the present invention, in a hollow structure formed by joining a plurality of constituent members, a concave portion is formed on one joint surface at a joint portion of the constituent members, A convex portion is formed on the other joint surface, and a rubber sheet is interposed at the joint surface portion to form a joint. Therefore, a concave portion formed on one joint surface of the constituent member and a convex portion formed on the other joint surface. In the joint portion with the concave portion, the swing operation can be allowed by a predetermined rotation angle of the convex portion,
Compared with the conventional one, the rotation angle can be increased, stress is not concentrated on the ends of the constituent members, and there is no fear that the ends are damaged, which is practically advantageous. In addition, a rubber sheet is interposed between a concave portion formed on one joint surface of the constituent member and a convex portion formed on the other joint surface, so that a joint having an earthquake-resistant structure can be realized. In this case, the impact caused by the vibration of the earthquake can be reduced, the abrasion between the ends can be prevented, and there is no fear that the ends are damaged. Further, since the shapes of the concave portion and the convex portion are simple, the production is easy, the cost can be maintained at low cost, and it is economically advantageous.

[Brief description of the drawings]

FIG. 1 is a schematic enlarged view of a joint portion of a component showing an embodiment of the present invention.

FIG. 2 is a schematic view of an invert type hollow structure.

FIG. 3 is a schematic view of a footing type hollow structure.

FIG. 4 is a detailed enlarged view of a main part of a joining portion of a component member.

FIG. 5 is a diagram showing dimensions of each part of a joining portion of a component member.

FIG. 6 is a schematic enlarged view of a joint portion of a constituent member showing another first embodiment of the present invention.

FIG. 7 is a schematic enlarged view of a joint portion of a component according to another second embodiment of the present invention.

FIG. 8 is a schematic enlarged view of a joining portion of a component according to a third embodiment of the present invention.

FIG. 9 is a schematic enlarged view of a joint portion of a component according to a fourth embodiment of the present invention.

[Explanation of symbols]

 2 Hollow Structure 2A Invert Type Hollow Structure 2B Footing Type Hollow Structure 6 Side Member 8 Upper Member 10 One Joining Surface 12 Depression (also referred to as “Ring Joint Depression”) 14 The Other Joint Surface 16 Projection (“ 18 Rubber sheet 20 Joint

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takao Iwasaki 5-7-10 Yanagizaki, Kawaguchi City, Saitama Prefecture Higashiurawa NH Residence 402 (72) Inventor Kiichi Yamashita 2-1-15- Shimizu, Shirai-machi, Inba-gun, Chiba Prefecture 302 (72) Inventor Sada Kono 39-12-1103 Senjujucho, Adachi-ku, Tokyo F-term (reference) 2D055 BB02 GC01 GC09 KB09 LA19 2E125 AA68 AA75 AD06 AE02 AF01 AG07 AG23 AG25 BB08 BC06 CA51 EA21 EB06 EB07

Claims (1)

[Claims] 1. A hollow structure formed by joining a plurality of constituent members, wherein a concave portion is formed on one joint surface at a joint portion of the constituent members, and a convex portion is formed on the other joint surface. A joint structure for a hollow structure, wherein a joint is formed by interposing a rubber sheet at a joint surface portion.