JP2008050794A - Entry blocking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new entry blocking device which can be installed between a base-isolated structure and another structure, and which can be installed even if an interval between them is short. <P>SOLUTION: This entry blocking device comprises: a bendable/stretchable elastic member 5; a plurality of sets of blocking shaft members 4 which are equipped with a first connecting member 6 connected to one end of the elastic member 5, and a second connecting member 8 connected to the other end thereof; a plurality of first holding members 10 which are fixed to the base-isolated structure 2 or another structure 3 in a multistep manner, and which each have a holding portion 10a for holding an end 6a of the first connecting member 6; and a plurality of second holding members 9 which are fixed to another structure 3 or the base-isolated structure 2 in a multistep manner while facing the first holding members 10, and which each have a holding portion 9a for holding an end of the second connecting member 8. The plurality of sets of blocking shaft members 4 are laid between the first and second holding members 10 and 9 in such an attitude as to be approximately in line with each other in a normal case, respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an entry blocking device, and in particular, an entry blocking arranged at an entrance / exit of a predetermined area in order to block a person from entering a predetermined area between a seismic isolation structure and another structure. It relates to the device.

  In recent years, seismic isolation structures have been proposed for the purpose of minimizing damage to structures caused by earthquakes and are now widely implemented. This seismic isolation structure can be explained by taking a detached house as an example. The seismic isolation device is interposed between the foundation and the foundation, and the seismic isolation device propagates the ground vibration due to the earthquake to the building. A structure that prevents being done. By the way, when building such a base-isolated structure, especially a base-isolated house, if there are other structures that are not seismically isolated, such as eaves, at least within the range displaced by the earthquake, The base-isolated house (base-isolated structure) will collide with other structures.

  Therefore, a certain interval must be provided between the seismic isolation structure and other structures. However, if the distance between this seismic isolation structure and other structures is wide, there is little danger even if there is a person at the time of the earthquake within this distance, but if it is narrow, the seismic isolation structure There is a risk that it will be caught between and other structures. Thus, in order to avoid such a risk, conventionally, a barrier fence using a movable pipe and a flexible joint body (see Patent Document 1) has been proposed.

  This barrier fence is provided with a support column on each of the seismic isolation structure side and the other structure side that is intended to block people from entering, and a rubber tube and a coil spring A pipe-shaped base tube is laid sideways with the opposing surfaces separated from each other through a flexible joint body combined with each other, and a small-diameter connecting rod is slidably inserted into the hollow portion of the pair of base tubes. Is. When the distance between the pair of support columns changes due to the operation of the seismic isolation device, the base tube expands and contracts by sliding along the outer periphery of the connecting rod at the intermediate position, and the change in the distance between the pair of support columns. It is intended to follow the amount.

JP 2000-110414 A

  However, since the pair of base tubes in the conventional technique is configured to expand and contract by sliding along the outer periphery of the small-diameter connecting rod, the minimum distance between the pair of support columns is the total length of the pair of base tubes, Or, since it is limited by the total length of the connecting rod, there is a problem that it cannot be installed when the distance between the seismic isolation structure and the other structure is narrow.

  Therefore, the present invention has been proposed in order to solve the problem of the above-described prior art approach blocking device, and even when the distance between the seismic isolation structure and other structures is narrow, An object of the present invention is to provide an approach blocking device that can be installed.

  In order to achieve the above-described object, an approach blocking apparatus according to the first invention (the invention described in claim 1) includes a seismic isolation structure provided with a seismic isolation device and other seismic isolation structures adjacent to the seismic isolation structure. An approach blocking device that blocks a gap formed between a structure and blocks a person from entering, and is an elastic member that can be bent and extended, and a first connecting member that is connected to one end of the elastic member. And a plurality of sets of shielding shaft members each having a second connecting member connected to the other end, and an end of the first connecting member fixed in multiple stages to the seismic isolation structure or other structure. A plurality of first holding members each having a holding portion for holding the second holding member, and a plurality of second holding members fixed to the other structure or the seismic isolation structure in a multi-stage facing the first holding members. A plurality of second holding members each having a holding portion for holding an end portion of the connecting member. Shielding shaft member is characterized in each that formed by laterally placed in an approximately straight line of the form and the first holding member in a position and the second holding member in the respective normal times.

  In the first aspect of the invention, a plurality of sets of shielding shaft members each including a flexible elastic member and first and second connecting members, and a plurality of members fixed in multiple stages to the seismic isolation structure or other structure. The first holding member and a plurality of second holding members fixed to face the first holding member, and the plurality of sets of shielding shaft members are substantially in a straight line at normal times. In the case where the distance between the base isolation structure and the other structure is reduced more than usual due to the occurrence of an earthquake, The elastic member is refracted and the end portions of the first and second connecting members are held by the first and second holding members, so that the distance between the seismic isolation structure and the other structure is reduced. A displacement amount to be widened can be absorbed.

  Further, when the interval between the base-isolated structure and the other structure is wider than usual due to the occurrence of an earthquake, the first and second substantially straight lines held by the first and second holding members are used. Since the end portion of the second connecting member deviates from the holding state and each of the plurality of sets of shielding shaft members falls to the ground, the amount of displacement by which the space between the seismic isolation structure and the other structure is widened is absorbed. be able to.

  Each component of the present invention does not substantially limit the minimum distance between the seismic isolation structure and the other structure by the component itself. It can be installed even when the interval is narrow. That is, the minimum distance between the seismic isolation structure and the other structure is not limited only by the size of the elastic member, the first and second connecting members, the first and second holding members, Since the elastic member is substantially determined by the horizontal distance in the most refracted state, the minimum distance between the base-isolated structure and the other structure is not substantially limited. In addition, the maximum distance between the seismic isolation structure and other structures is the maximum distance when the shielding shaft members are widened from a generally straight line. Is not particularly restricted.

  According to a second invention (invention of claim 2), in the first invention, each end of the first and second connecting members constituting the plurality of sets of shielding shaft members, and the first And the holding portion formed on each of the second holding members includes one engaging convex surface formed in a substantially hemispherical shape, and corresponding to the curvature of the one engaging convex surface. The other engaging concave surface that slidably engages the mating convex surface is formed relatively.

  In the second aspect of the invention, each of the end portions of the first and second connecting members and the holding portion formed on each of the first and second holding members have one of the substantially hemispherical shapes. Since the engaging convex surface and the other engaging concave surface that slidably engages corresponding to the curvature of the one engaging convex surface are formed relatively, it corresponds to the refraction of the elastic member. Thus, it is possible to cope with the displacement in all directions of the ground due to the occurrence of the earthquake.

  That is, the displacement direction of the ground due to an earthquake may be displaced in all directions (360 degrees with respect to the normal set position) instead of a limited specific direction, but centered on a predetermined position of the seismic isolation structure In addition, with respect to the displacement within the radius of the shielding shaft member, the one engaging convex surface and the other engaging concave surface formed in a substantially hemispherical shape engage and slide, so that the seismic isolation structure and When the distance from the other structure is narrower than usual, the elastic member is refracted and can absorb the displacement.

  According to a third invention (invention of claim 3), in the second invention described above, relative to the end of the first or second connecting member and the first or second holding member. The one engaging convex surface and the other engaging concave surface formed are such that at least one side of the first connecting member side or the second connecting member side is such that the one engaging convex surface and the other engaging concave surface. It is characterized in that they cannot be separated from each other.

  In the third aspect of the invention, the one engaging convex surface and the other engaging concave surface formed on the end portion of the first or second connecting member and the first or second holding member are the first engaging concave surface. Since at least one side of the connecting member side or the second connecting member side is such that the one engaging convex surface and the other engaging concave surface cannot be separated from each other, the seismic isolation structure and the other structure In the case where the distance between the first connecting member and the second connecting member is increased, the at least one side of the first connecting member or the second connecting member is held without being detached from the holding member. Therefore, since the shielding shaft member does not fall or scatter on the ground when it is wider than normal, a secondary disaster can be prevented even if there is a person nearby.

  According to a fourth invention (invention of claim 4), in the first, second, or third invention, the middle of at least one of the first or second connecting members constituting the plurality of sets of shielding shaft members. Is provided with a full length adjustment mechanism capable of adjusting the length of the first or second connecting member.

  In the fourth aspect of the invention, since a full length adjustment mechanism capable of extending / contracting the length of the first or second connecting member is provided in the middle of at least one of the first or second connecting members, Even if the total length of the shaft member and the distance between the first holding member and the second holding member do not coincide with each other, the length of the first or second connecting member can be adjusted to be expanded or contracted to provide a plurality of sets of shielding. The shaft member can be held by the first holding member and the second holding member in a substantially straight posture.

  According to a fifth invention (invention of claim 5), in the first, second, third, or fourth invention, at least one of the first or second connecting members constituting the plurality of sets of shielding shaft members. A wire rod insertion hole through which the wire rod is inserted is opened in the middle of the wire rod. One wire rod is inserted into each of the wire rod insertion holes, and the upper end of the wire rod is arranged at the uppermost stage. The weight is fixed to at least one of the first and second connecting members, and a weight is fixed to the lower end.

  In the fifth invention, one wire is inserted in the middle of at least one of the first or second connecting members constituting the plurality of sets of shielding shaft members, and the upper end of the wire is on the uppermost stage. Since the weight is fixed to at least one of the arranged first or second connecting members and the weight is fixed to the lower end, the shielding shaft member can be prevented from scattering. That is, when the distance between the base-isolated structure and the other structure is reduced more than usual due to the occurrence of an earthquake, when the refractive index of the elastic member increases, the first and second connecting members Of the first and second holding members, or when the distance between the seismic isolation structure and the other structure is wider than normal, The ends of the first and second connecting members that are substantially straight held by the first and second holding members deviate from the holding state, but are connected by one wire, so that the shielding shaft member is It is possible to prevent scattering.

  In the first invention (the invention described in claim 1), when the distance between the base-isolated structure and the other structure is reduced more than usual due to the occurrence of an earthquake, the elastic member is refracted, When the interval between the seismic isolation structure and the other structure is wider than usual, the end portions of the first and second connecting members held by the first and second holding members are held. Since the configuration deviates from the state, the component itself does not substantially limit the minimum distance between the seismic isolation structure and the other structure, and the distance between the seismic isolation structure and the other structure is not. It can be installed even in a narrow case. As a result, the degree of freedom of design or construction work is increased, and safety is improved by reliably preventing people from entering between the seismic isolation structure and other structures when an earthquake occurs. Can do.

  Further, in the second invention (the invention according to claim 2), since it is possible to cope with displacements in all directions of the ground due to the occurrence of an earthquake, the shield shaft member is centered on a predetermined position of the seismic isolation structure. For displacement within the radius, the engagement convex surface and the other engagement concave surface formed in a substantially hemispherical shape engage and slide, so that the distance between the seismic isolation structure and the other structure When the width is reduced more than usual, the elastic member is refracted and can absorb the displacement.

  In the third invention (the invention according to claim 3), at least one side of the first connecting member side or the second connecting member side is such that one engaging convex surface and the other engaging concave surface cannot be separated from each other. Since the space between the seismic isolation structure and the other structure is wider than normal, at least one side of the first connecting member side or the second connecting member side is It is held without detaching from the holding member. Therefore, since the shielding shaft member does not fall or scatter on the ground when it is wider than normal, a secondary disaster can be prevented even if there is a person nearby.

  In the fourth invention (invention according to claim 4), the length of the first or second connecting member can be adjusted to be extended or contracted in the middle of at least one of the first or second connecting members. Since the mechanism is provided, even if the total length of the shielding shaft member and the distance between the first holding member and the second holding member are inconsistent, the length of the first or second connecting member is expanded or contracted. By adjusting, the plurality of sets of shielding shaft members can be respectively held by the first holding member and the second holding member in a substantially straight posture. Thereby, even when the installation distance between the first holding member and the second holding member is different, the compatibility of the shielding shaft member can be provided.

In the fifth invention (the invention according to claim 5),
One wire rod is inserted in the middle of at least one of the first or second connecting members constituting the plurality of sets of shielding shaft members, and the upper end of the wire rod is arranged at the uppermost stage. Since the weight is fixed to at least one of the second connecting members and the lower end is fixed, the end portions of the first and second connecting members are held by the first and second holding members. When it deviates from a part, while being able to prevent a shielding shaft member from scattering, even if there are people near, a secondary disaster can be prevented.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. As shown in FIG. 1 or FIG. 3A, an approach blocking device 1 according to this embodiment includes a coil spring 5 that can be bent and extended, and a first connecting shaft 6 that is connected to one end of the coil spring 5. And seven sets of shielding shaft members 4 formed uniaxially with the second connecting shaft 8 connected to the other end portion, and holding portions for holding the end portions of the first connecting shaft 6. And seven first bearings 10 fixed to the other structure 7 in seven steps, and holding portions for holding the end portions of the second connecting shaft 8 at positions facing the first bearings 10 respectively. Each of them has seven second bearings 9 fixed to the seismic isolation structure 2 in seven stages.

  First, in the seismic isolation structure 2, as shown in FIG. 1, a large number of upright members 12 are erected on a foundation 11 laid on the ground, and a steel base 13 is arranged on the upper surface side of these upright members 12. A base 14 is arranged on the upper surface, a structure such as a column 15 is arranged on the upper surface, and an outer wall (or outer plate) 16 is overlaid at a position adjacent to the column 15 and the like. The upper structure including the steel frame 13 is supported by a seismic isolation device (not shown), and when the ground vibrates due to the occurrence of an earthquake, only the foundation 11 and the standing member 12 vibrate or swing together with the ground. In addition, since vibration is not propagated to the upper structure including the steel base 13 due to the operation of the seismic isolation device (not shown), the structure does not vibrate or swing, thereby preventing damage due to the vibration or swing of the earthquake. be able to.

  In addition, although the thing using a roller member, the thing using a sliding member, the thing using a rubber member etc. are known for the said seismic isolation apparatus, the approach interruption | blocking apparatus 1 of this invention is the said seismic isolation apparatus. Can be implemented by any method. In the embodiment of the present invention, the seven first bearings 10 are fixed to the other structure 3, and the seven second bearings 9 are fixed to the seismic isolation structure 2. The seven first bearings 10 may be fixed to the seismic isolation structure 2, and the seven second bearings 9 may be fixed to the other structure 3.

  Next, as shown in FIG. 1, the structure of the entry blocking device 1 is such that seven sets of shielding shaft members 4 are horizontally arranged in seven steps on the inner surface facing the seismic isolation structure 2 and the other structure 3. It is an apparatus that is arranged and shields these seven sets of shielding shaft members 4 so that a person cannot enter the gap between the seismic isolation structure 2 and the other structure 3. As shown in FIG. 3A, these shielding shaft members 4 are a coil spring 5 that is an elastic member that can bend and stretch, and a first connecting member that is connected to one end (left side in the drawing) of the coil spring 5. A certain first connecting shaft 6 and a second connecting shaft 8, which is a second connecting member connected to the other end (right side in the figure) of the coil spring 5, are formed in a single axis.

  Among these, the coil spring 5 is refracted from a straight free posture (see FIG. 1) by narrowing the distance between both ends and being pressed (see FIG. 2), and from this state, the both ends are bent. The refraction angle is increased by increasing the distance between the portions and decreasing the pressing force, and when the pressing force is released, it is restored to a straight free posture (see FIG. 1). Note that the coil spring 5 is not limited to a coil spring, and may be a shaft-like elastic body made of a resin such as hard rubber or urethane as long as it is an elastic body.

  One end (left side in the figure) of the coil spring 5 shown in FIG. 3A is formed with a connecting hole having an inner diameter (not shown), and the connecting hole is formed at the right end of the first connecting shaft 6 (not shown). One end of the coil spring 5 and the right end of the first connecting shaft 6 are connected by press-fitting the small outer diameter portion of the stepped portion. A hemispherical engagement convex surface is formed on the left end portion 6a of the first connection shaft 6 on the opposite side of the connection portion, and a notch for engaging a bifurcated inner surface of a spanner not shown in the vicinity thereof. A notch 6b is formed on both the front and back sides of the paper surface of FIG. 3A, and a wire insertion hole 6c for inserting a wire 21 to be described later is drilled from the center near the notch 6b.

  The other end (right side in the drawing) of the coil spring 5 is formed with a connecting hole having an inner diameter (not shown), and the shaft main body of the second connecting shaft 8 including the shaft main body portion 7A and the head portion 7B. The other outer end portion of the coil spring 5 and the left end portion of the shaft main body portion 7A are connected by press-fitting a small outer diameter portion (not shown) formed at the left end portion of the portion 7A. A female screw 8d is threaded on the right end of the shaft main body portion 7A on the opposite side of the connecting portion.

  A male screw 8b that can be screwed with the female screw 8d is threaded on the left end of the head portion 7B disposed on the right side of the shaft main body portion 7A, and the head screw 7b is attached to the shaft main body portion 7A by this male screw 8b. And a hemispherical engaging convex surface is formed on the right end 8a of the head 7B, and a spanner head bifurcated inner surface (not shown) is engaged in the vicinity thereof. Cutouts 8c are formed on both the front and back sides of the paper surface of FIG. The connection between the one end of the coil spring 5 and the first connection shaft and the connection means between the other end of the coil spring 5 and the second connection shaft are not limited to the connection by the press-fitting. Adhesion or welding may be used. Further, the portion except the left end portion 6a of the first connecting shaft 6 and the right end portion 8a of the second connecting shaft 8 is preferably as thin as possible.

  The shielding shaft member 4 is held by the first bearing 10 and the second bearing 9, and as shown in FIG. 3A, the first bearing 10 is a first holding member. Is fixed to another structure 3, and a hemispherical concave holding portion 10a that is slidable by engaging with the left end portion 6a of the first connecting shaft 6 is formed on the inner surface thereof, and the second The second bearing 9, which is a holding member, is fixed to the seismic isolation structure 2, and has a hemispherical concave holding portion 9 a that is slidable by engaging with the right end portion 8 a of the second connecting shaft 8 on the inner surface thereof. Is formed.

  The shielding shaft member 4 has a left end portion 6a of the first connecting shaft 6 shown in FIG. 3A held by the holding portion 10a of the first bearing 10 and a right end of the second connecting shaft 8. The portion 8 a is held by the holding portion 9 a of the second bearing 9. The shielding shaft member 4 held in this way cannot be held when the entire length is shorter or longer than the distance between the holding portion 10a of the first bearing 10 and the holding portion 9a of the second bearing 9. In this case, however, the second connecting shaft 6 is turned by hand or by spannering the notch 6b of the first connecting shaft 6 and the notch 8c of the second connecting shaft 8 respectively. By rotating the connecting shaft 8, it is possible to adjust the connecting shaft 8 to a suitable total length by the screw lead of the full length adjusting mechanism formed by the male screw 8 b and the female screw 8 d of the connecting shaft 8.

  The shield shaft member 4 configured as described above is arranged as shown in FIG. 1, and the first bearing 10 is arranged in parallel on the inner surface of the other structure 7 in seven steps from the top to the bottom. The second bearing 9 is fixed in parallel to the outer wall 16 of the seismic isolation structure 2 in parallel from the top to the bottom in seven steps at the positions facing the first bearing 10. Both end portions 6a and 8a of the respective shielding shaft members 4 are engaged with the holding portions 10a and 9a of the bearings 10 and 9 shown in FIG. Further, as shown in FIG. 1, the wire 21 is movable in the wire insertion hole 6c (see FIG. 3A) drilled in the connecting shaft 6 of each of the shielding shaft members 4 arranged in 7 stages. The upper end of the wire 21 is inserted into the uppermost connecting shaft 6 and a weight 22 is fixed to the lower end of the wire 21.

  In addition, as shown in FIG. 1, the entrance blocking device 1 in which these shielding shaft members 4 are horizontally mounted in a multistage manner between the seismic isolation structure 2 and the other structures 3 is provided for each shielding shaft member 4. When the total length is substantially the same as the distance between the holding portion 10a of each first bearing 10 and the holding portion 9a of each second bearing 9 (see FIG. 3A), each shielding shaft member 4 Since the pressing force is not applied to the coil spring 5 (see FIG. 3A), each shielding shaft member 4 is laid in a straight line in a free posture shown in FIG.

  On the other hand, as shown in FIG. 2, the space between the seismic isolation structure 2 and the other structure 3 is reduced, and the holding portions 10a of the first bearings 10 and the holdings of the second bearings 9 are held. When the distance to the portion 9a is shorter than the total length of each shielding shaft member 4 in the free posture, the pressing force is applied to the coil spring 5 of each shielding shaft member 4, and each shielding shaft member 4 is It changes to the refraction posture shown in 2.

  When the coil spring 5 is refracted as described above, the both end portions 6a and 8a of each shielding shaft member 4 are changed from the engaged state shown in FIG. 3 (a) as the refraction angle of each shielding shaft member 4 increases. The left end portion 6a of the shielding shaft member 4 slides while being inclined in the holding portions 10a of the first bearings 10 and the right end portion 8a is inclined in the holding portions 9a of the second bearings 9, respectively. As the distance increases, both end portions 6a and 8a of each shielding shaft member 4 are disengaged from the holding portions 10a and 9a of the respective bearings 10 and 9, but the side surfaces in the vicinity of both end portions 6a and 8a of each shielding shaft member 4 are different from each bearing 10. , 9 are held in the vicinity of the openings of the holding portions 10a, 9a, so that the refractive posture can be maintained as shown in FIG.

  Next, the function and effect will be described while explaining how to use the above-described approach blocking device 1. In addition, when an earthquake occurs, the actual displacement with the ground is the other structure 3 that is not the seismic isolation structure and the ground side of the seismic isolation structure 2 (base 11, standing member 12). The structure 2 is not propagated with vibrations or fluctuations caused by earthquakes. In addition, the operating range of the seismic isolation structure 2 used in the following description is based on the ground side of the other structure 3 and the seismic isolation structure 2 due to the occurrence of the earthquake (foundation 11, standing member). 12) is the range to be displaced.

  First, as shown in FIG. 3A, a hemispherical engagement convex surface is formed on the left end portion 6a of the first connecting shaft 6 constituting the shielding shaft member 4, and the right end of the second connecting shaft 8 is also formed. The portion 8a is formed with a hemispherical engagement convex surface, and the inner surface of the first bearing 10 is engaged with the left end portion 6a of the first connecting shaft 6 to be slidable. The second bearing 9 has an inner surface formed with a hemispherical concave holding portion 9a that is slidable by engaging with the right end portion 8a of the second connecting shaft 8. Therefore, corresponding to the refraction of the coil spring 5, the both end portions 6a, 8a of each shielding shaft member 4 are shielded as the refraction angle of each shielding shaft member 4 increases from the engaged state shown in FIG. The left end portion 6a of the shaft member 4 is in the holding portion 10a of each first bearing 10, and the right end portion 8a is in the holding portion 9a of each second bearing 9. As the inclination angle increases, both end portions 6a and 8a of each shielding shaft member 4 are disengaged from the holding portions 10a and 9a of the respective bearings 10 and 9, but both end portions 6a of each shielding shaft member 4 are moved. , 8a are held in the vicinity of the openings of the holding portions 10a, 9a of the bearings 10, 9, so that the refraction posture can be maintained as shown in FIG.

  And by this structure and effect | action, it can respond to the displacement over all the directions of the ground by generation | occurrence | production of an earthquake. That is, the displacement direction of the ground due to the earthquake may be displaced in all directions (360 degrees with respect to the normal set position) instead of a limited specific direction. At the center, with respect to the displacement within the radius of the shielding shaft member 4, both end portions 6a, 8a of each shielding shaft member 4 and the holding portions 10a, 9a of the bearings 10, 9 are engaged and slide. When the distance between the seismic isolation structure 2 and the other structure 3 is reduced more than usual, the coil spring 5 can be refracted to absorb the amount of displacement.

  Further, in the normal mode, the posture of each shielding shaft member 4 is a straight line shown in FIG. 1 or FIG. 3A, and the coil spring 5 is in a free posture. In order to engage both end portions 6a, 8a of each shielding shaft member 4 with each holding portion 10a, 9a of each first bearing 10 and each second bearing 9 in this state, the entire length of the shielding shaft member 4 is increased. A screw lead of a full-length adjusting mechanism composed of a male screw 8b and a female screw 8d after the shaft main body 7A and the head 7B are rotated after being temporarily engaged slightly shorter than the distance between the holding portions 10a and 9a. To adjust the overall length by engaging.

  When an earthquake occurs in this normal state, the ground side of the other structure 3 and the seismic isolation structure 2 (the foundation 11 and the standing member 12) is displaced to the right side of the figure together with the ground with respect to the base isolation structure 2. The space between the outer wall 16 of the seismic isolation structure 2 and the other structure 3 is reduced from the state shown in FIG. 1, and as shown in FIG. 2, the coil springs 5 (see FIG. )) Is refracted. In addition, when the ground side (the foundation 11 and the standing member 12) of the other structure 3 and the seismic isolation structure 2 is displaced to the left side of the figure along with the ground with respect to the seismic isolation structure 2, the outer wall 16 of the seismic isolation structure 2 The first and second connecting shafts (6) that are substantially straight and are held by the first and second bearings (10, 9) are widened from the state shown in FIG. , 8) deviates from the holding state, and the plurality of sets of shielding shaft members 4 fall to the ground.

  Next, another example different from the above-described embodiment will be described. As shown in FIG. 4A, the configuration is such that the right end portion 38a of the second connecting shaft 38 constituting the shielding shaft member 34 and the holding portion 39a of the second bearing 39 with which the right end portion 38a engages. Is different from the above-described embodiment, and other configurations are the same, and thus detailed description thereof is omitted. As shown in FIG. 4A, the shielding shaft member 34 is provided at a coil spring (not shown) (in the fracture region of the central portion in the drawing) that is a flexible member that can bend and stretch, and one end portion (left side in the drawing) of the coil spring (not shown). A first connecting shaft 36 that is a connected first connecting member and a second connecting shaft 38 that is a second connecting member connected to the other end (the right side in the figure) on the opposite side are uniaxially formed. Each is formed.

  A hemispherical engagement convex surface is formed on the left end portion 36 a of the first connecting shaft 36. The second connecting shaft 38 on the opposite side of the connecting portion is composed of a shaft main body portion 37A and a head portion 37B, and a female screw 38c is threaded on the right end portion of the shaft main body portion 37A arranged on the left side of the drawing. Has been. A male screw 38b that can be screwed with a female screw 38c is threaded at the illustrated left end of the head portion 37B disposed on the right side of the shaft main body portion 37A. The male screw 38b causes the head portion 37B to be connected to the shaft main body portion 37A. While being screwed together with the female screw 38c, a spherical engagement convex surface is formed at the right end portion 38a of the head portion 37B.

  The shield shaft member 34 configured in this manner is held by the first bearing 40 and the second bearing 39, and is a first holding member as shown in FIG. The first bearing 40 is fixed to another structure 3, and a hemispherical concave holding portion 40a that is slidable by being engaged with the left end portion 36a of the first connecting shaft 36 is formed on the inner surface thereof. Yes. The second bearing 39, which is the second holding member, is fixed to the seismic isolation structure 2, and the right end thereof is slidable by engaging with the right end 38a of the second connecting shaft 38 on the inner surface thereof. A super hemispherical concave holding portion 39a having an inner diameter smaller than the outer diameter of the portion 38a is formed.

As shown in FIG. 4A, the super hemispherical concave shape of the holding portion 39a of the second bearing 39 has an end surface 39b provided at a position beyond the center line 39c from the bottom of the holding portion 39a. .
Therefore, the right end portion 38a of the second connecting shaft 38 is slidable by being engaged with the holding portion 39a of the second bearing 39 and cannot be detached from the holding portion 39a of the second bearing 39. .
In order to engage the right end 38 a of the second connecting shaft 38 with the holding portion 39 a of the second bearing 39, the right end of the second connecting shaft 38 is heated by heating the holding portion 39 a of the second bearing 39. Engagement can be achieved by press-fitting the portion 38a or by forming a lid shape (not shown) from the center line 39c to the end surface 39b and screwing it after assembly.

  In the normal form, the posture of each shielding shaft member 34 is a straight line shown in FIG. 4A, and an earthquake occurs in this normal state, as shown in FIG. 4B. The distance between the seismic isolation structure 2 and the other structure 3 is reduced, and the distance between the holding portion 40a of the first bearing 40 and the holding portion 39a of the second bearing 39 is determined by the shielding shaft member 34. When the length is shorter than the total length in the free posture, a pressing force is applied to a coil spring (not shown) of the shielding shaft member 34, and the shielding shaft member 34 changes to a refractive posture shown in FIG.

  When the coil spring (not shown) is refracted as described above, the both end portions 36a and 38a of the shielding shaft member 34 are shielded as the refraction angle of the shielding shaft member 34 increases from the engaged state shown in FIG. The left end portion 36a of the member 34 slides while being inclined in the holding portion 40a of the first bearing 40 and the right end portion 38a is inclined in the holding portion 39a of the second bearing 39. As the inclination angle increases, the left end portion 36a of the shielding shaft member 34 is disengaged from the holding portion 40a of the bearing 40, but the side surface near the left end portion 36a of the shielding shaft member 34 is held near the opening of the holding portion 40a of the bearing 40. Therefore, as shown in FIG. 4B, the refraction posture can be maintained. Further, the right end portion 38a of the shielding shaft member 34 slides and tilts within the holding portion 39a of the bearing 39, and the right end portion 38a of the shielding shaft member 34 is held by the holding portion 39a of the bearing 39 so as not to be detached. Therefore, the refraction posture shown in FIG. 4B can be maintained.

  When the distance between the seismic isolation structure 2 and the other structure 3 is widened from the normal state shown in FIG. 4A, one left end portion 36 a of the shielding shaft member 34 is connected to the first bearing 40. The other right end portion 38a maintains the state of being held by the holding portion 39a of the second bearing 39, so that the shielding shaft member 34 does not fall. Thus, since the shielding shaft member 34 does not fall, a secondary disaster can be prevented even if there is a person nearby. Therefore, in the case of the other example shown in FIG. 4, the wire 21 and the weight 22 shown in FIG. 1 are unnecessary.

  As is clear from the above description, according to the embodiment of the present invention, the shielding shaft member shown in FIG. 3A corresponds to the displacement of the interval between the seismic isolation structure 2 and the other structure 3. Since the coil spring 5 is refracted and the change in the inclination angle between the first connecting shaft 6 and the second connecting shaft 8 is absorbed by this refraction, the seismic isolation structure 2 and the other structure 3 are absorbed. The minimum distance between the base isolation structure 2 and the other structure 3 can be reliably installed even if the distance between the base isolation structure 2 and the other structure 3 is narrow.

  In the above description, the coil spring 5 of each shielding shaft member 4 shown in FIG. 1 or FIG. 3 (a) is normally in a straight line of a free posture, but this state is the same as the outer wall 16 of the seismic isolation structure 2 and others. 2 is the maximum, and when the refraction angle of each shielding shaft member 4 shown in FIG. 2 is maximum, the distance between the outer wall 16 of the seismic isolation structure 2 and the other structure 3 is minimum. In such a case, an intermediate point between the straight line shown in FIG. 1 and the state where the excavation angle is maximum shown in FIG. 2 can be set as a normal time.

  In the above embodiment, the description has been given on the assumption that the other structure adjacent to the base isolation structure is a fixed structure that does not include the base isolation device. The invention can be implemented.

It is the front view which sectioned a part which shows the whole in the normal time of the approach interception device concerning an embodiment. It is the front view which sectioned a part which shows the whole at the time of the occurrence of an earthquake of an approach interception device. It is the elements on larger scale which show the shielding axis | shaft member of an approach interruption | blocking apparatus, Comprising: (a) is normal, (b) shows the form at the time of the occurrence of an earthquake. It is the elements on larger scale which show the other example of the shielding shaft member of an approach interruption | blocking apparatus, Comprising: (a) is normal time, (b) shows the form at the time of the occurrence of an earthquake.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Intrusion blocker 2 Seismic isolation structure 3 Other structures 4 Shielding shaft member 5 Coil spring 6 1st connection shaft 6a End part 6c Wire rod insertion hole 8 2nd connection shaft 8a End part 9 2nd bearing 9a Holding Part 10 First bearing 10a Holding part 11 Foundation 14 Base 21 Wire rod 22 Weight

Claims (5)

An entry blocking device that blocks a gap formed between a seismic isolation structure equipped with a seismic isolation device and another structure adjacent to the seismic isolation structure, thereby blocking human entry. ,
A plurality of sets of shielding shaft members comprising a flexible elastic member, a first connecting member connected to one end of the elastic member, and a second connecting member connected to the other end;
A plurality of first holding members fixed in multiple stages to the seismic isolation structure or other structures, each having a holding portion for holding an end of the first connecting member;
A plurality of second structures which are fixed to the other structure or the seismic isolation structure in a multi-stage facing the first holding members and hold holding ends of the second connecting members. 2 holding members,
The approach blocking apparatus according to claim 1, wherein the plurality of sets of shielding shaft members are respectively placed horizontally on the first holding member and the second holding member in a substantially straight posture.   The end portions of the first and second connecting members constituting the plurality of sets of shielding shaft members and the holding portions formed on the first and second holding members are formed in a substantially hemispherical shape. The one engaging convex surface and the other engaging concave surface that correspond to the curvature of the one engaging convex surface and slidably engage the one engaging convex surface are formed relatively. The intrusion blocking apparatus according to claim 1, wherein   One engaging convex surface and the other engaging concave surface formed relatively to the end of the first or second connecting member and the first or second holding member are the first connecting member. 3. The intrusion blocking device according to claim 2, wherein at least one of the side and the second connecting member side is configured such that the one engaging convex surface and the other engaging concave surface cannot be separated from each other.   In the middle of at least one of the first or second connecting members constituting the plurality of sets of shielding shaft members, a full length adjusting mechanism capable of adjusting the length of the first or second connecting member is provided. The entry blocking device according to any one of claims 1 to 3, wherein A wire rod insertion hole through which a wire rod is inserted is opened in the middle of at least one of the first or second connecting members constituting the plurality of sets of shielding shaft members, and one wire rod is provided in each of the wire rod insertion holes. Are inserted respectively, and the upper end of the wire rod is hooked on at least one of the first or second connecting members arranged at the uppermost stage, and a weight is fixed to the lower end. The entry blocking device according to any one of claims 1, 2, 3, and 4.