JP2015200063A - Vibration isolation material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration isolation material which is displaced by a desired amount when a great external force acts due to an earthquake and the like and can be restored to an original state when the external force is released, and which has a high restoration speed.SOLUTION: A vibration isolation material includes a plurality of coiled springs (201, 202, 203, 301 and 302) different in outside diameter dimension. The coiled spring with the small outside diameter dimension is inserted into a space inside the coiled spring with the large outside diameter dimension. Both ends of each of the coiled springs are connected together to assume a closed shape, and winding directions of the coiled springs adjacent to each other with respect to a radial direction are directions opposite to each other.

Description

  The present invention relates to a seismic isolation material used, for example, in a coupling device for a tunnel segment.

The applicant has proposed a coupling device capable of reliably coupling members to be fastened (for example, a structure such as a tunnel segment) by simply inserting the male metal fitting into the female metal fitting. (See Patent Document 1).
However, in such a coupling device, it is difficult to prevent the segments from being destroyed by the energy of the earthquake by causing a minute displacement (for example, 3 mm) between the segments when the earthquake occurs.
On the other hand, a seismic isolation material is arranged on the female joint side fixed to each of the members to be fastened, and a desired minute displacement is secured by the deformation of the seismic isolation material to prevent segment breakage. Technology has been proposed.

Conventionally, a disk-shaped urethane rubber having a through hole formed in the center is used as a seismic isolation material used in such a technique.
However, urethane rubber has a problem that once it shrinks, the speed of restoration is slow. And if the restoration speed after contraction is slow, the seismic isolation material will be applied when it is pressed to the opposite side after the first compression when the force pressing in both directions axially against the segment due to the earthquake acts continuously. Does not function, and the necessary minute displacement cannot be ensured and the segment may be damaged.
On the other hand, in the case of a material that has a high recovery speed after compression, if it is displaced by the minute displacement (for example, 3 mm: a numerical value that displaces a coupling device composed of a male metal fitting and a female metal fitting during an earthquake), the original shape is released even if the external force is released. Will not function as a seismic isolation material.

Therefore, as the seismic isolation material, a material that can be restored to its original state as soon as the external force is released even if it is displaced by a minute displacement (for example, 3 mm), and has a high speed of restoration is preferable. .
However, no such seismic isolation material has been proposed at this time.

Japanese Patent No. 4240408

  The present invention has been proposed in view of the above-described problems of the prior art, and when a large external force is applied due to an earthquake or the like, it is displaced by a desired amount and is restored to its original state when the external force is released. The purpose is to provide a seismic isolation material that can be restored and that can be restored quickly.

  The seismic isolation material (200, 210, 300) of the present invention has a plurality of coil springs (201, 202, 203, 301, 302) having different outer diameters, and a coil spring having a smaller outer diameter has a larger outer diameter. The coil spring is inserted into the inner space of the coil spring (for example, the coil spring 202 is inserted inside the coil spring 201). The coil springs adjacent to each other are wound in opposite directions (the coil spring 201 and the coil spring 202 are wound in the opposite direction: the coil spring 202 and the coil spring 203 are wound in the opposite direction).

  In the present invention, the seismic isolation material (200) has two coil springs (201, 202) having different outer diameter dimensions, and the winding direction of the coil spring having a smaller outer diameter dimension is opposite to the winding direction of the coil spring having a larger outer diameter dimension. The direction (the winding direction of the coil spring 201 and the coil spring 202 is opposite) is preferable (see FIG. 1).

  Alternatively, the seismic isolation material (210) has three coil springs (201, 202, 203) having different outer diameters, and the coil spring having the smallest outer diameter is in the inner space of the coil spring having the second largest outer diameter. (The coil spring 203 is inserted inside the coil spring 202), and the coil spring having the second largest outer diameter is inserted into the inner space of the coil spring having the largest outer diameter (the coil spring 202 is located inside the coil spring 201). Inserted) and the winding direction of the coil spring (203) having the smallest outer diameter is opposite to the winding direction of the coil spring (202) having the second largest outer diameter (the winding direction of the coil spring 203 and the coil spring 202). ), The winding direction of the coil spring (202) having the second largest outer diameter dimension is the coil spring (201) having the largest outer diameter dimension. The can-direction has the opposite direction (winding direction of the coil spring 202 and coil spring 201 reverse) preferably (see Figure 3).

  Further, in the present invention, the closed shape is a substantially circular shape (ring shape), and the base-isolated material (301) having a large closed shape and the base-isolated material (302) having a small closed shape are arranged on the same plane, It is preferable that the seismic isolation material (302) having a small closed shape is disposed inward in a substantially circular radial direction of the seismic isolation material (301) having a large closed shape (see FIG. 4).

When the seismic isolation material of the present invention is applied to a coupling device that couples segments (for example, segments for tunnels), each segment to be fastened (for example, segments SM1 and SM2 for tunnels) has a male side. A joint (10, 30) and a female side joint (20) are provided, the male side joint includes a male side bolt (male pin 10), and the female side joint (20) includes a casing (11) and a plurality of female side bolts (12). In the vicinity of the male end of the casing (11), a tapered ring (17) having an inclined surface (taper 173) formed on the inner peripheral surface is provided. If the female-side bolt (12) contacting the inclined surface (173) on the peripheral surface is urged to the male side (the segment SM1 side where the male-side joint 10 is provided: the side separated from the female-side joint). In the radial direction Is formed so as to move to, a configured coupling device to engage the male screw (10) by a female-side bolt (12) moves radially inwardly (100),
A large-diameter portion (3) is formed at the longitudinal central portion of the male bolt (10), and the large-diameter portion (3) combines the male-side joint (10) and the female-side joint (20). At this time, the segment (SM1) provided with the male side joint (10, 30) and the segment (SM2) provided with the female side joint (20) are formed at positions that are boundary portions,
A lid-like member (front lid 18) that engages with the male end (112) of the casing (11) of the female joint (20) is provided, and a seismic isolation material (200) is provided on the female side of the lid-like member (18). 210, 300), the taper ring (17) is provided on the female side of the seismic isolation material, and the seismic isolation material (200, 210, 300) is provided on the male end of the taper ring (17). ) Is formed, and a recess (175) is formed.
The region of the female side joint (20) on the female side (segment (SM2) side where the female side joint is provided: the side away from the male side joint) of the casing (11) (for example, the anchor portion 111 of the female side joint, return It is preferably used as a seismic isolation material (200, 210, 300) of a coupling device in which ribs (118A, 118B) are formed in a region closer to the female side than the place where the spring 15 is accommodated.

Here, the male side bolt (male pin 10B) of the coupling device is
An annular protrusion (3B) is provided in the longitudinal center (instead of the large diameter part), and when the male joint (10B) and the female joint are connected, the protrusion (3B) You may form in the position used as the boundary part of the segment which provided the male side coupling (10B), and the segment which provided the female side coupling.
Alternatively, the male bolt (male pin 10C) may have a straight cylindrical shape (in place of the large-diameter portion or the protrusion) in the shaft portion (1C).
The segment may be a concrete segment or a metal segment (for example, a steel segment: SM3, SM4).

According to the seismic isolation material of the present invention having the above-described configuration, a plurality of coil springs (201, 202, 203) having different outer diameter dimensions are provided, and the coil spring having a smaller outer diameter dimension is a coil spring having a larger outer diameter dimension. For example, a large load (e.g., 290 kN) corresponding to a slight displacement (e.g., 3 mm) between the male joint and the female joint of the tunnel segment coupling device is applied. However, the restoring properties of the plurality of coil springs are not lost, and the function can continue to function as a seismic isolation material.
Further, since the coil spring is made of metal (for example, steel or stainless steel), the speed of restoration after deformation is fast. Therefore, even if an external force that moves the segment to both sides in the tunnel axis direction due to an earthquake or the like continuously acts as a seismic isolation material.

  In addition, according to the seismic isolation material of the present invention, how many coil springs are used (two types or three types), a seismic isolation material having a large closed shape and a seismic isolation material having a small closed shape are combined at the same time. Whether it is used or only a single seismic isolation material is used, or by setting the outer diameter size and material of the material constituting the coil spring, various characteristics required as a seismic isolation material can be realized. .

Further, when the seismic isolation material of the present invention is used as the seismic isolation material (200, 210, 300) of the coupling device (100), the segment (SM1) in which the male side joint (30) is embedded and the female side When a shearing force acts on the boundary part of the segment (SM2) in which the joint (20) is embedded, the shearing force is borne (loaded) by the large-diameter part (3) having a large cross-sectional area. Can be burdened (loaded).
On the other hand, the shaft portion other than the large-diameter portion (3) of the male-side bolt (10) does not need to add a strong shearing force between the segments, so that the outer diameter can be reduced. Then, by reducing the outer diameter of the male bolt (10) other than the large diameter portion (3), the female joint (20) and the male joint (10, 30) can be reduced in size and weight. As a result, the entire apparatus can be reduced in size and weight.

  If the seismic isolation material of the present invention is used as the seismic isolation material (200, 210, 300) of the coupling device (100), the female side (separate from the male side joint) of the casing (11) of the female side joint (20). Ribs (118A, 118B) are formed in the region (more specifically, the region closer to the female side than the portion where the anchor portion 111 and the return spring 15 of the female side joint are housed). Even if the side joint (20 or casing 11) tries to rotate in the concrete segment (SM2) (centering on the longitudinal central axis C), the rib (118A) is in contact with the solidified concrete. Is blocked. Therefore, the female side joint (20) does not perform so-called “idle rotation” with respect to the concrete segment (SM2).

  Further, if the seismic isolation material of the present invention is used as the seismic isolation material (200, 210, 300) of the coupling device (100), the taper ring (17) causes the concave portion (175) on the male side end surface and other locations. A step portion is formed between them, and the base isolation material (200, 210, 300) is positioned by the step portion. At the same time, even if the seismic isolation material (200, 210, 300) tries to move (uneven), the movement (unevenness) is prevented by the peripheral edge of the seismic isolation material coming into contact with the stepped portion. As a result, the movement (unevenness) of the seismic isolation material is prevented.

1 is a perspective view showing a first embodiment of the present invention. It is explanatory drawing which shows the various dimensions of a seismic isolation material. It is a perspective view which shows 2nd Embodiment of this invention. It is a perspective view which shows 3rd Embodiment of this invention. It is a side view of the male side joint of the coupling device of the segment for tunnels which applied the seismic isolation material of this invention. It is a side view of the female side joint of the coupling device of FIG. It is a partial cross section side view which shows the state which the male side joint of FIG. 6 and the female side joint of FIG. 7 couple | bonded. It is a side view which shows the casing of the female side joint of FIG. It is AA arrow sectional drawing of FIG. FIG. 9 is a cross-sectional view taken along line B-B in FIG. 8. It is side surface sectional drawing of the taper ring in the coupling device of the segment for tunnels. It is a cross-sectional side view which shows the state which attached the seismic isolation material to the taper ring of FIG. It is a side view which shows the problem in the taper ring of a prior art. It is a cross-sectional side view which shows the modification of the taper ring of FIG. It is a cross-sectional side view of the cover member in the coupling device of the segment for tunnels. It is a partial cross section side view which shows the state which inserted the male pin in the cover member of FIG. It is a partial cross section side view which shows the state which engaged the cover member with the female side coupling in the coupling device of the segment for tunnels. It is a side view of the male pin in the coupling device of FIGS. It is a front view of the male pin of FIG. It is a cross-sectional side view of the tool for screwing the male pin of FIG. 18 to the male side joint embedding insert. It is a structural member of the tool of FIG. 20, and is a Y arrow view of FIG. FIG. 21 is a cross-sectional front view showing a state in which the male pin of FIG. 18 is screwed into the male side joint embedded insert using the tool of FIG. 20. It is a partial cross section side view which shows the state which applied the seismic isolation material of this invention to the coupling device different from the coupling device demonstrated with reference to FIGS. It is a side view of the male pin in another coupling device different from each coupling device of FIGS. It is a front view which shows the tool for fastening the male pin of FIG. 24 and the said male pin. FIG. 26 is a side view of a male pin in another coupling device different from the coupling devices of FIGS.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a first embodiment of the seismic isolation material of the present invention.
In FIG. 1 (1), a seismic isolation material 200, indicated as a whole by reference numeral 200, connects both ends of a stainless steel coil spring 201 having a large outer diameter (for example, a coil outer diameter of 7.5 mm and a wire diameter of 0.7 mm). The whole is configured in a ring shape. Here, the ring outer diameter D of the seismic isolation material 200 is 63 mm, for example, and the ring inner diameter d is 48 mm, for example.
As shown in FIG. 1 (2), a coil spring 202 made of stainless steel and having an outer dimension smaller than that of the coil spring 201 is accommodated in the radially inner space of the coil spring 201. Here, the coil outer diameter φ of the coil spring 202 is 6 mm, for example, and the wire diameter is 0.7 mm, for example.
As shown in FIG. 1A, the coil spring 201 and the coil spring 202 have a ring shape or a shape in which both end portions are coupled and closed. Here, the coil spring 201 and the coil spring 202 are wound in opposite directions. In addition, about the dimension which the ring outer diameter D and the ring inner diameter d of the coil springs 201 and 202 mean in FIG. 2 (1), about the dimension which the coil outer diameter φ of the coil springs 201 and 202 means 2 (2).

1 and 2, according to the inventor's experiment, when compressive force (external force) is applied in the directions of arrows P and P, the compressive force is 290 kN. The displacement was 3 mm. And when the compressive force was released, it was restored. This indicates that the seismic isolation material 200 can withstand a compressive force of 290 kN, and has the same strength as a conventional urethane seismic isolation material.
The seismic isolation material 200 is immediately restored when the compressive force is removed after the compressive force of 290 kN is applied to displace 3 mm. That is, even if the compression force of 290 kN is applied and displaced by 3 mm, the seismic isolation material 200 does not lose its recoverability and can continue to function as a seismic isolation material. In this respect, it is superior to a conventional urethane-based seismic isolation material that loses its resilience when displaced by 3 mm by applying a compressive force of 290 kN. Here, the deformation amount of 3 mm is the amount of displacement required for the coupling device in the event of an earthquake when the seismic isolation material shown in FIGS. 1 and 2 is used as a seismic isolation material for a tunnel segment coupling device, for example. equal.
Further, since the two coil springs 201 and 202 of the seismic isolation material 200 are made of metal (stainless steel), the restoration speed (restoration response) after removing the load is faster than that of the urethane seismic isolation material. Therefore, even if an earthquake that moves the segment to both sides in the tunnel axis direction occurs, the seismic isolation material 200 according to the first embodiment functions reliably (as a seismic isolation material).

In the seismic isolation material 200 according to the first embodiment, the coil spring 201 having a large coil outer diameter φ and the coil spring 202 having a small coil outer diameter φ have opposite coil winding directions. Therefore, even when a large compressive load of 290 kN is applied, the wire rod of the coil spring 201 does not enter between the wire rods of the coil spring 202 and a so-called “engaged” state does not occur. For this reason, even if a large compressive force is applied, the compression displacement does not significantly increase with respect to a desired displacement amount (for example, 3 mm).
Furthermore, since the two coil springs are made of stainless steel, the seismic isolation material 200 is not easily affected by rust or the like.

Next, a second embodiment of the present invention will be described with reference to FIG.
In FIG. 3, the seismic isolation material according to the second embodiment is generally indicated by reference numeral 210.
In the seismic isolation material 200 according to the first embodiment described with reference to FIGS. 1 and 2, a coil spring 202 having a small coil outer diameter φ is inserted inside a coil spring 201 having a large coil outer diameter φ. On the other hand, the seismic isolation material 210 according to the second embodiment is a stainless steel having a smaller outer dimension in a space radially inward of the coil spring 202 inserted inside the coil spring 201 having a large coil outer diameter φ. A coil spring 203 (for example, a coil outer diameter of 4.5 mm and a wire diameter of 0.7 mm) is inserted.
In other words, the seismic isolation material 210 according to the second embodiment includes a coil spring 201 having a large outer dimension, a coil spring 202 inserted inside the coil spring 201 as shown in FIG. The coil spring 203 is inserted. Then, as shown in FIG. 3A, both ends of the coil spring 201 (similarly to the coil springs 202 and 203) are joined to form a closed shape or a ring shape.

Although not clearly illustrated, the winding directions of the coil spring 201 and the coil spring 202 are opposite to each other, and the winding directions of the coil spring 202 and the coil spring 203 are opposite to each other. That is, with respect to the direction of the outer dimension of the coil indicated by symbol φ in FIG. 2 (2), the coil springs of the adjacent (or adjacent) coil springs (coil spring 201 and coil spring 202, coil spring 202 and coil spring 203) are opposite to each other. It has become. For example, if the winding direction of the coil spring 201 is right-handed, the winding direction of the coil spring 202 is left-handed and the winding direction of the coil spring 203 is right-handed.
This is because, as in the first embodiment, when a large load (external force) is applied, a coil spring having a large coil outer dimension φ is prevented from being caught by a coil spring having a small coil outer dimension φ.

Since the seismic isolation material 210 of the second embodiment has a three-layer structure of coil springs 201, 202, and 203, it can withstand a large load (external force) compared to the seismic isolation material 200 of the first embodiment. The restoration speed after the load is removed is high (the restoration response is good, and the seismic isolation material is more suitable.
Other configurations and operational effects in the second embodiment are the same as those in the first embodiment.

Next, a third embodiment of the present invention will be described with reference to FIG.
In FIG. 4, a seismic isolation material 300 is obtained by arranging two seismic isolation materials 301 and 302 on the same plane and disposing the seismic isolation material 302 in a radially inner region of the seismic isolation material 301. Here, the seismic isolation material 301 is the seismic isolation material according to the first embodiment, and the seismic isolation material 302 has a shape (closed shape: ring shape) formed by connecting both ends. The radial dimension is smaller than the shape (ring shape). In other words, the seismic isolation material 300 is a combination of two seismic isolation materials 301 and 302, and this combination is described as “the seismic isolation material 300” in this specification.
Although not occupied in FIG. 4, the seismic isolation materials 301 and 302 are both made of stainless steel, and a coil spring having a small coil outer diameter is inserted into a space inside the coil spring having a large coil outer diameter. Alternatively, a coil spring having a smaller coil outer diameter may be inserted into the inner space of the coil spring having a smaller coil outer diameter.
And the winding direction of the coil spring with a large coil outer diameter and the coil spring with a small coil outer diameter are reversed. Furthermore, the winding direction of the coil spring having a small coil outer diameter and the coil spring having a smaller coil outer diameter are also reversed.

In the third embodiment of FIG. 4, since the seismic isolation material 300 has two seismic isolation materials 301 and 302 arranged on the same plane, it can cope with a large load, and a restoration response to the load displacement. In addition, the additional range of functioning as a seismic isolation material can be made wider than in the first and second embodiments.
Other configurations and operational effects in the third embodiment of FIG. 4 are the same as those of the embodiment of FIGS.

According to the embodiment of FIGS. 1 to 4, how many (how many layers) the coil spring is configured (two layers as in the first embodiment or three layers as in the second embodiment), a single Whether to use only two seismic isolation materials (first and second embodiments) or two types of seismic isolation materials (a large seismic isolation material 301 and a small seismic isolation material 302) to be used in a two-roll structure According to the (third embodiment), the load bearing performance can be freely set by further setting the outer dimensions and materials of the material constituting the coil spring.
And the characteristic requested | required as a seismic isolation material can be implement | achieved easily.

If the seismic isolation material of the present invention is applied to, for example, a coupling device for a tunnel segment, it can exhibit good performance as a seismic isolation material.
In addition, in the seismic isolation materials 300, 310, and 320 configured by two or three layers of coil springs, instead of inserting a coil spring having a small outer diameter inside a coil spring having a large outer diameter, an elastic material such as a rubber ring A ring made of steel can be inserted.

Next, with reference to FIGS. 5-22, the case where the seismic isolation material which concerns on embodiment of this invention is used with the coupling device of the segment for tunnels, etc. is demonstrated.
7 includes a male-side bolt (hereinafter referred to as “male pin”) 10 and a female-side joint 20.

In FIG. 5, the male pin 10 is engaged (screwed) with a female screw 31 formed on an embedded member (hereinafter referred to as {insert}) 30 by a male screw 7 formed on the male pin 10. Here, the insert 30 is embedded in the first segment SM1 so that the end surface (left end surface in FIG. 5) is located on the coupling surface Fs1 side of the first segment SM1 that is the coupled member.
In order to avoid interference with the large-diameter portion 3 of the male pin 10, a region 32 having a large inner diameter is formed on the coupling surface Fs <b> 1 side of the insert 30.

The details of the male pin 10 are shown in FIG. In FIG. 18, the male pin 10 has a first shaft portion 1, a second shaft portion 2, and a large diameter portion 3.
The first shaft portion 1 is formed with a male screw 4 for coupling, and the tip 5 (left end in FIG. 18) of the male screw 4 has a partial truncated cone shape. A groove 6 (see FIG. 19) is formed in the tip 5 so as to pass through the shaft center.
The groove 6 is used for engaging the insertion plate portion t2 of the tool T shown in FIGS. 20 and 21 with the groove. The tool T will be described later.
In FIG. 18, a male screw 7 is formed on the second shaft portion 2 of the male pin 10.

In FIG. 6, a female side joint 20 includes a casing 11, a plurality of female side bolts 12, a guide plate 13, a spring seat 14, a coil spring 15, and a base isolation material (the base isolation shown in FIGS. 1 to 4). Any one of the materials 200, 210, and 300: hereinafter referred to as “the seismic isolation material 200”), a taper ring 17, and a lid-like member (hereinafter referred to as “front lid”) 18 are provided.
The casing 11 is embedded in the second segment SM2 so that the end surface (the right end surface in FIG. 6) is located on the coupling surface Fs2 side of the second segment SM2 that is the coupled member.

  As shown in FIG. 8, the casing 11 includes a solid shaft portion 110, an anchor portion 111 which is an end portion (left end portion in FIG. 8) of the solid shaft portion 110, and the coupling surface Fs2 side (see FIG. 6: FIG. 8, an end surface 112 on the right side, a cylindrical portion 113 that forms a storage chamber 117 for a plurality of female bolts 12 (see FIG. 6: not shown in FIG. 8), a solid shaft portion 110, and a cylindrical portion 113. A tapered portion 114 to be connected is provided.

An internal thread 115 t is formed in an opening 115 (hereinafter referred to as “front lid engaging portion”) 115 on the end surface 112 side (right side in FIG. 8) of the cylindrical portion 113.
A storage chamber 116 and a storage chamber 117 are formed on the anchor portion 111 side (left side in FIG. 8) with respect to the front lid engaging portion 115. In the storage chamber 116, a tapered ring 17 (see FIG. 6; not shown in FIG. 8) is stored. The storage chamber 117 is formed on the anchor portion 111 side (left side in FIG. 8) with respect to the storage chamber 116, and stores the coil spring 15 and a plurality of female bolts 12 (see FIG. 6: not shown in FIG. 8). ing.

In the anchor portion 111, ribs 118A extending in parallel with the central axis Lc of the casing 11 are formed at two locations (see FIG. 9).
And the rib 118B extended in parallel with the central axis Lc of the casing 11 is formed in the taper part 114 (refer FIG. 9).
By forming the ribs 118A and 118B shown in FIGS. 8 to 10, the female side joint 20 (or the casing 11) is prevented from rotating around the central axis Lc of the casing 11 in the concrete segment SM2. Is done. As a result, the female joint 20 (or the casing 11) is prevented from so-called “free running” in the concrete segment SM2.

  In FIG. 8, annular protrusions 119 are formed at, for example, three locations on the outer periphery of the solid shaft portion 110 in the casing 11. By providing the protrusion 119, the casing 11 (female side joint 20 as a whole) is restrained from moving along the central axis Lc in the concrete segment SM2 (see FIG. 7). As a result, when an external force that moves the concrete segments SM1 and SM2 in the direction of the central axis Lc is applied, the female side joint 20 (or the casing 11) is suppressed from being pulled out from the concrete segment SM2. .

As shown in FIG. 11, the taper ring 17 is configured in a substantially annular shape. A region 171 (straight inner periphery) having a constant inner diameter and a taper portion 173 are formed on the inner peripheral surface of the taper ring 17. Here, as the taper portion 173 progresses from one end surface 172 side (left side in FIG. 11) of the taper ring 17 to the opposite end surface 174 side (right side in FIG. 11), the inner diameter dimension decreases (decreases in diameter). ) Is formed.
A concave portion 175 having a circular cross section is formed on the other end surface 174 side (right side in FIG. 11) of the taper ring 17. As shown in FIG. 12, the recess 175 accommodates the seismic isolation material 200 and the like.

Here, in the prior art, as shown in FIG. 13, a seismic isolation material (not shown) is disposed on the end surface 174J on the male joint side (the right side in FIG. 13) of the taper ring 17J. However, as shown by the arrow Y, the seismic isolation material (not shown) may be deviated in the vertical direction in FIG.
As shown in FIG. 12, in the taper ring 17 used in the first embodiment, since the seismic isolation material is accommodated in the recess 175, the seismic isolation material 200 or the like moves in the direction of arrow Y in FIG. Is suppressed.
Details of the seismic isolation material 200 will be described later.

FIG. 14 shows a tapered ring 17A having a different form from the tapered ring 17 shown in FIGS.
As described above, a region 171 having a constant inner diameter is formed on the inner peripheral surface of the tapered ring 17 shown in FIGS. On the other hand, only the taper portion 173 is formed on the inner peripheral surface of the taper ring 17A shown in FIG. 14, and the “region having a constant inner diameter” is not formed (there is no straight inner peripheral portion). . And in the taper ring 17A shown in FIG. 14, the edge W is formed in the inner peripheral surface side of the side (the right side of FIG. 14) in which the recessed part 175 for seismic isolation material accommodation is formed.
Other configurations and operational effects of the modified example 17A of the tapered ring shown in FIG. 14 are the same as those of the tapered ring 17 shown in FIGS.

The front lid 18 is disposed at the opening side end of the casing 11 of the female side joint 20 (the right end in FIGS. 6, 8, and 17).
As shown in FIG. 15, a male screw 180 t is formed over the entire outer periphery 180 of the front lid 18.
An area 184 having an inner diameter larger than the inner diameter of the inner periphery 182 other than the vicinity of the casing 11 opening side is formed near the casing 11 opening side (right side in FIG. 15) of the inner periphery 182 of the front lid 18. The region 184 has such a shape that the large-diameter portion 3 of the male pin 10 is engaged (accommodated) when the male pin 10 is inserted into the female joint 20.

A pair of holes 186 (blind holes) are formed on the end surface of the front lid 18 on the opening side of the casing 11 (right side in FIG. 15) at a symmetrical position with respect to the center point of the front lid 18. The pair of holes 186 are formed to insert a pair of protrusions of a tool (not shown). In order to attach the front lid 18 to the front lid engaging portion 115 (see FIG. 8) of the casing 11, a female screw 115t formed on the front lid engaging portion 115 (see FIG. 8) and a male screw on the outer periphery 180 of the front lid 18 are provided. 180t must be screwed with a tool (not shown). The tool (not shown) is a tool used for screwing the male screw 180t of the front lid 18 with the female screw 115t of the front lid engaging portion 115 (see FIG. 8).
FIG. 16 shows a state where the male pin 10 is inserted into the front lid 18. And the state which attached the front cover 18 to the female side joint 20 is shown by FIG.

In FIG. 17, a coil spring 15 and a female bolt 12 are housed in the housing chamber 117 of the casing 11.
When the female side joint 20 is assembled, the coil spring 15 is first inserted, and then the plurality of female side bolts 12 supported by the spring seat 14 and the guide plate 13 are inserted.
After inserting the plurality of female bolts 12 supported by the guide plate 13, the taper ring 17, the seismic isolation material 200 and the like are sequentially inserted into the casing 11. Then, the front lid 18 is screwed into the front lid engaging portion 115 of the casing 11 by the above-described dedicated tool (not shown).

A plurality of female-side bolts 12 are provided in the female-side joint 20, and the plurality of female-side bolts 12 are urged to the side that is pressed against the taper ring 17 by the coil spring 15 (right side in FIG. 17). The taper ring 17 is formed with a taper 173 (see FIGS. 11, 12, and 14) so that when the plurality of female bolts 12 are pressed against the taper ring 17 by the coil spring 15, the taper 173 is directed radially inward. ing.
Therefore, when the male pin 10 is inserted into the female joint 20 as shown in FIG. 5, the plurality of female bolts 12 are urged radially inward, and the thread of the female bolt 12 is male. Engage with the thread of the pin 10. As a result, the plurality of female-side bolts 12 are engaged with the male pin 10, and the male pin 10 cannot be pulled out from the female-side joint 20.
Even when a change occurs in the axial direction between the segment SM1 and the segment SM2 due to an external force such as an earthquake, the biasing by the coil spring 15 and the presence of the taper portion 173 of the taper ring 17 sufficiently follow the change. can do.

In FIG. 18, the large-diameter portion 3 is provided at the center in the longitudinal direction of the male pin 10. The large-diameter portion 3 is set so as to be positioned at the joining portion of the segments SM1 and SM2 when the segments SM1 and SM2 are joined in the tunnel longitudinal direction. For this reason, the large-diameter portion 3 is subjected to the shearing force of the joined portions of the joined segments SM1 and SM2. That is, in the male pin 10, the large-diameter portion 3 having a large cross-sectional area is responsible for the shearing force acting between the segments SM1 and SM2.
Since the large-diameter portion 3 is responsible for the shearing force, the male pin 10 bears the shearing force due to the large cross-sectional area of the large-diameter portion 3, and the shearing force that can be loaded by the male pin 10 increases.
On the other hand, the cross-sectional area of the male pin 10 that does not receive the shearing force can be reduced. In other words, the male pin 10 other than the large diameter portion 3 can be designed to have a small diameter, and the female side joint can be reduced in size and weight.

As described above, the groove 6 is formed at the tip 5 of the first shaft portion 1 of the male pin 10.
When joining the concrete segments SM1 and SM2, it is necessary to attach the male pin 10 to the insert 30 embedded in the concrete segment SM1. In order to attach the male pin 10 to the concrete segment SM1, the male pin 10 is screwed into the female screw 31 of the concrete segment SM1. At that time, a groove 6 shown in FIG. 19 is provided to rotate the male pin 10. That is, the groove 6 is formed to rotate the male pin 10.

20 and 21, a tool T for rotating the male pin 10 with respect to the insert 30 (see FIG. 5) embedded in the concrete segment SM1 is shown.
As shown in FIG. 20, the tool T for rotating the male pin 10 with respect to the insert 30 (see FIG. 5) includes a cylindrical member t1, a rectangular steel plate t2, and a handle t3.

  The thickness dimension of the steel plate t2 (dimension in the direction perpendicular to the paper surface of FIG. 20) is set to a dimension that can be engaged with the groove 6 (see FIGS. 19 and 20) formed at the end of the male pin 10. Yes. In other words, the thickness dimension of the steel plate t2 is set slightly smaller than the width dimension of the groove 6 (dimension in the left-right direction in FIG. 19).

The cylindrical member t1 is formed of, for example, a steel pipe, and the inner peripheral surface is a smooth surface. The inner diameter of the cylindrical member t <b> 1 is set slightly larger than the outer diameter of the male screw 4 of the male pin 10.
As shown in FIG. 21, a groove t1g is formed at the end of the cylindrical member t1 on the handle t3 side (left side in FIG. 21). The groove t1g is provided for attaching the steel plate t2.

When the male pin 10 is attached to the female screw 31 of the insert 30 embedded in the concrete segment SM1, the steel sheet t2 of the tool T is engaged with the groove 6 at the tip of the male pin 10, as shown in FIG. Thus, the first shaft portion 1 of the male pin 10 is inserted into the cylindrical member t1 of the tool T.
Then, the male screw 7 of the second shaft portion 2 of the male pin 10 is screwed into the female screw 31 of the insert 30 embedded in the concrete segment SM1, and the tool T is rotated so that the large-diameter portion 3 of the male pin 10 is The insert 30 is screwed in until it comes into contact with the step 32s of the region 32 (region with a large inner diameter) on the opening side (left side in FIG. 22).

5 to 22, any of the seismic isolation materials 200, 210, and 300 (the seismic isolation material 200) described with reference to FIGS. 1 to 4 is applied as the seismic isolation material. The Which of the seismic isolation materials 200, 210, and 300 is applied is determined by various conditions at the site where the coupling device is applied.
In addition, in the base isolation material 200, 210, 300 (base isolation material 200, etc.), instead of the coil spring (coil spring having a small outer diameter) inserted into the space inside the coil spring having a large outer diameter, elasticity such as a rubber ring is used. It is also possible to insert a material ring.

According to the coupling device described with reference to FIGS. 5 to 22, when the segments SM <b> 1 and SM <b> 2 are joined, the large-diameter portion 3 at the center in the longitudinal direction of the male pin 10 is the same as the segment SM <b> 1 in which the insert 30 is embedded. It is located at the boundary of the segment SM2 in which the female side joint 20 is embedded.
Therefore, when a shearing force acts on the boundary between the segment SM1 and the segment SM2, the shearing force is borne by the large-diameter portion 3 having a large cross-sectional area, so that the shearing force can be reliably borne by the pin 10 that pushes the shearing force. .
On the other hand, since the strong shear force between segments does not act on shaft parts other than the said large diameter part 3 of the male pin 10, the outer diameter can be made small. Then, by reducing the outer diameter dimensions of the male pin 10 other than the large-diameter portion 3, the radial dimensions of the female side joint 20 and the male side joint (10, 30) are reduced, and the overall size and weight are reduced. Can be realized. As a result, the entire apparatus can be reduced in size and weight.

  Further, according to the coupling device described with reference to FIGS. 5 to 22, since the ribs 118 </ b> A and 118 </ b> B are formed in the casing 11 of the female side joint 20, the female side joint 20 is rotated within the concrete segment SM <b> 2 ( Even if an external force is applied to cause the ribs 118A and 118B to contact the solidified concrete, the rotation (so-called “idle”) is prevented. For this reason, the female side joint 20 is prevented from so-called “idle” with respect to the concrete segment SM2.

Further, in the female side joint 20 of the coupling device described with reference to FIGS. 5 to 22, even if a change occurs in the shear direction between the segment SM <b> 1 and the segment SM <b> 2 due to an earthquake or the like, the seismic isolation material 200 or the like remains in the shear direction. By transforming, the seismic isolation function can be fully demonstrated.
Even if a large load corresponding to a slight displacement (for example, 3 mm) is applied to the gap between the male side joint and the female side joint of the tunnel segment coupling device, a plurality of coil springs constituting the seismic isolation material 200 and the like Restorability will not be lost, and it can continue to function as a seismic isolation material.
Further, since the coil spring is made of metal (for example, steel or stainless steel), the speed of restoration after deformation is fast. Therefore, even if an external force that moves the segment to both sides in the tunnel axis direction acts continuously, it functions reliably as a seismic isolation material.

Here, the tapered ring 17 holding the seismic isolation material 200 and the like together with the lid member 18 has a recess 175 formed on the end surface of the male side (segment SM1 side where the insert 30 is embedded). The seismic isolation material 200 is accommodated.
Therefore, the seismic isolation material 200 and the like are positioned by the stepped portion of the peripheral portion of the concave portion 175 of the taper ring 17, and the seismic isolation material 200 and the like are easily and accurately positioned during assembly. At the same time, even if an external force is applied that causes the seismic isolation material 200 or the like to move (uneven) in the Y direction of FIG. Because it touches, it is blocked. As a result, movement (unevenness) of the seismic isolation material 200 or the like is prevented.

FIG. 23 shows a case where the seismic isolation material according to the embodiment of the present invention is used in a coupling device different from that described with reference to FIGS. The whole coupling device in FIG. 23 is represented by reference numeral 100A.
5 to 22, the female joint 20 including the male joint insert 30 and the casing 11 is attached to the concrete segments SM1 and SM2.
On the other hand, the coupling device 100A shown in FIG. 23 is applied to a so-called “steel segment”.

In FIG. 23, a steel segment SM3 to which the male pin 10 which is a male side joint is attached is a segment in which the entire inside of a box-like member 41 welded with a steel plate 40 is filled with concrete C3.
A through hole 41h through which the large diameter portion 3 of the male pin 10 is inserted is formed in the coupling surface Fs3 of the box-shaped member 41.

  In the steel segment SM3, before the concrete C3 is placed on the box-like member 41, a nut N is fixed inside the through hole 41h (for example, by welding). The nut N is disposed concentrically with the through hole 41 h, and a female screw (not shown) formed on the inner peripheral surface of the nut N is screwed with a male screw 7 formed on the second shaft portion 2 of the male pin 10. Here, a female screw (not shown) of the nut N is formed over the entire axial direction of the nut N, and a through hole is formed in the center of the nut N. A cap CP is put on the side of the nut N that is separated from the steel segment SM4 (the right side in FIG. 23). The cap CP is provided so that the concrete filled in the steel segment SM4 does not enter the through hole of the nut N.

The axial length of the female thread portion of the nut N is set to be longer than the axial length of the second shaft portion 2 (see FIGS. 18 and 22) of the male pin 10.
Concrete C <b> 3 is placed inside the box-shaped member 41. Then, the male pin 10 is attached to the steel segment SM3 formed by placing the concrete C3 using the tool T described with reference to FIGS. 20 to 23 in the same manner as the coupling device described with reference to FIGS. It is attached.

  In FIG. 23, in the steel segment SM4 in which the female side joint 20A is embedded, concrete C4 is placed on a box-shaped member 42 made of a steel plate 40. A through hole 42h is formed in the coupling surface Fs4 of the box-shaped member 42, and the large diameter portion 3 of the male pin 10 is engaged with the through hole 42h.

  Also in the steel segment SM4, before the concrete C4 is placed inside the box-shaped member 42, the central axis of the female joint 20A is disposed concentrically with the through hole 42h on the inner side of the through hole 42h. An end face 20Ae on the male joint side (right side in FIG. 23) of the female side joint 20A is fixed to the box-like member 42 (for example, by welding).

  The female side joint 20A includes a cylindrical member 11A, a plurality of female side bolts 12, a guide plate 13, a spring seat 14, a coil spring 15, and a seismic isolation, similar to the coupling device described with reference to FIGS. A material 200 and the like, a taper ring 17, and a front lid 18A are provided.

  The end of the cylindrical member 11A on the side separated from the male pin 10 (left side in FIG. 23) has a cap 111A fixed to the inner peripheral surface of the end of the cylindrical member 11A, and the hollow portion of the cylindrical member 11A is supported by the cap 111A. It is blocked. This is to prevent the concrete from entering the hollow portion of the cylindrical member 11A when the box-shaped member 42 is filled with concrete.

The hollow portion side (the right side in FIG. 23) of the cap 111 </ b> A has a function of a spring seat at one end of the coil spring 15.
Hereinafter, the plurality of female bolts 12, the guide plate 13, the spring seat 14, the coil spring 15, the seismic isolation material 200 and the like, the taper ring 17, and the front lid 18 </ b> A are described as “joint components”. .

  A female side joint 20A in a state where the joint constituent member is incorporated in the cylindrical member 11A (the opening side end of the cylindrical member 11A and the opening of the front lid 18A are on the same plane) is formed in the steel member 42. When welding to the segment inner side of the hole 42h, the female joint 20A is temporarily fixed by a jig (not shown) so as to abut on the segment inner side of the through hole 42h. Although not shown, the jig has a male screw portion that can be inserted into the through-hole 42h and is screwed into a female screw 18At formed on the inner peripheral surface of the front lid 18A. The male screw portion is connected to the front lid 18A. The female side joint 20A is brought into contact with the inside of the segment of the through hole 42h (inside the box-shaped member 42) by screwing into the female screw 18At.

After the female joint 20A is brought into contact with the inside of the segment of the through hole 42h with a dedicated jig, the female side joint 20A is fixed to the inside of the segment of the through hole 42h, for example, by welding.
After the female side joint 20A is fixed to the inside of the segment, concrete C4 is placed in the box-shaped member 42 to constitute the steel segment SM4.

In FIG. 23, the coupling device 100A is applied to a so-called “filled type” steel segment. In the segments CM3 and CM4, concrete is poured into the box-shaped members 41 and 42 formed of steel plates (steel plates) 40. However, it is possible to apply the coupling device of FIG. 23 to a steel segment into which concrete is not poured.
Other configurations and operational effects of the coupling device of FIG. 23 are the same as those of the coupling device of FIGS.

24 and 25 illustrate a case where the seismic isolation material according to the embodiment of the present invention is used in a coupling device different from the coupling devices described in FIGS. 5 to 23.
5 to 23, a male pin 10 having a large diameter portion 3 as shown in FIG. 18 is used.
On the other hand, in the coupling device described in FIGS. 24 and 25, as shown in FIG. 24, a projection (stopper) 3B having a semicircular cross section is formed at the center in the longitudinal direction of the male pin 10B.
This protrusion 3B is located at the boundary between a segment provided with a male side joint (not shown) and a segment provided with a female side joint (not shown) and bears a shearing force acting between the segments.

As shown in FIG. 25, the protrusion 3B of the male pin 10B is formed in a shape in which a part of the ring is cut out. In the protrusion 3B, the part 31B in which the ring is cut out constitutes a so-called “two-sided width”, and has a shape that can be easily engaged with the spanner TS, for example.
When the male pin 10B shown in FIGS. 24 and 25 is screwed into a female screw of a male joint (not shown), the spanner TS may be engaged with (for example) a notch 31B forming a two-surface width and rotated. .

The male pin 10B shown in FIGS. 24 and 25 can also be applied to both a concrete segment and a steel segment.
Then, by making the shape of the front lids 18, 18A, 18B complementary to the protrusion 3B, the male pin 10B shown in FIGS. 24 and 25 is applied to each of the coupling devices shown in FIGS. Is possible.
The coupling device described with reference to FIGS. 24 and 25 with respect to the configuration and the effects other than those described above is the same as the coupling device described with reference to FIGS.

FIG. 26 shows a male pin 10C used in another coupling device different from the coupling devices described with reference to FIGS.
In FIG. 26, the large-diameter portion and the protrusion are not particularly formed in the center in the longitudinal direction of the male pin 10C, but are formed straight.
A groove 6C similar to the groove 6 described with reference to FIGS. 18 and 19 is formed at the tip 5C on the side close to the female side joint of the male pin 10C in FIG. 26 (left side in FIG. 26).
When the male pin 10C of FIG. 26 is screwed into the female screw of the male side joint, it may be rotated using a tool as shown in FIGS.

The male pin 10C shown in FIG. 26 is also applicable to both a concrete segment and a steel segment.
And if the shape of the front lid | cover 18, 18A, 18B is changed, the male pin 10C shown in FIG. 26 is applicable with respect to the coupling device shown in FIGS.
The coupling device described with reference to FIG. 26 with respect to configurations and operational effects other than those described above is the same as the coupling device described with reference to FIGS.

It should be noted that the illustrated embodiment is merely an example, and is not a description to limit the technical scope of the present invention.
For example, in the illustrated embodiment, the seismic isolation material used in the tunnel segment coupling device has been described, but the present invention is not limited to this.

DESCRIPTION OF SYMBOLS 1 ... 1st axial part 2 ... 2nd axial part 3 ... Large diameter part 6 ... Groove 10 ... Male pin 11 ... Casing 12 ... Female side volt | bolt 16 .... Seismic isolation material 17 ... Taper ring 18 ... Front lid 20 ... Female side joint 30 ... Insert 200, 210, 220, 300 ... Seismic isolation material 201, 202, 203, 301, 302 ... Coil spring

Claims (4)

  A plurality of coil springs having different outer diameters and a coil spring having a smaller outer diameter are inserted into the inner space of the coil spring having a larger outer diameter, and both end portions of the plurality of coil springs are joined and closed. A seismic isolation material characterized in that the winding direction of adjacent coil springs is opposite in the radial direction.   The seismic isolation material according to claim 1, comprising two coil springs having different outer diameter dimensions, wherein the coil spring having a smaller outer diameter dimension is wound in a direction opposite to the winding direction of the coil spring having a larger outer diameter dimension.   It has three coil springs with different outer diameters. The coil spring with the smallest outer diameter is inserted into the inner space of the coil spring with the second largest outer diameter, and the coil spring with the second largest outer diameter is the outer diameter. The coil spring is inserted into the inner space of the coil spring having the largest dimension, and the winding direction of the coil spring having the smallest outer diameter dimension is opposite to the winding direction of the coil spring having the second largest outer diameter dimension. The seismic isolation material according to claim 1, wherein the winding direction of the second largest coil spring is opposite to the winding direction of the coil spring having the largest outer diameter.   The closed shape is a substantially circular shape, and the seismic isolation material having a large closed shape and the seismic isolation material having a small closed shape are arranged on the same plane, and the inside of the generally circular shape of the seismic isolation material having a large closed shape The seismic isolation material according to claim 1, wherein a seismic isolation material having a small closed shape is disposed.

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