JP6162457B2 - Displacement limiting device - Google Patents

Description

  The present invention relates to a displacement limiting device that is installed between an upper structure and a lower structure of a structure such as a bridge or a structure such as a building and limits the relative displacement between the upper structure and the lower structure.

  The following Patent Document 1 describes a displacement limiting device that is installed between a bridge girder and an abutment of a bridge and limits the relative displacement between the bridge girder and the abutment in the event of an earthquake of a predetermined level or higher. As shown in FIG. 10 (A), this displacement limiting device 100 has an inward flange 103a in which a lower stopper 101 having an outward flange 101a on the upper portion is installed on the abutment 102 and holds the outward flange 101a. The upper stopper 103 having the above is installed on the bridge girder 104. Then, the displacement limiting device 100 engages with the inward flange 103a and the lower stopper 101 in the event of an earthquake of a predetermined level or higher, so that the bridge girder 104 and the abutment 102 are relatively aligned in the bridge axis direction and the bridge axis perpendicular direction. Limit displacement. Further, the displacement limiting device 100 limits the relative displacement in the height direction of the bridge girder 104 and the abutment 102 by engaging the inward flange 103a and the outward flange 101a.

  However, the displacement limiting device 100 has a complicated structure and a high weight. Furthermore, when the displacement limiting device 100 limits the displacement in the direction of the bridge axis or the direction perpendicular to the bridge axis, the inward flange 103a and the lower stopper 101 come into point contact as shown in FIG. Stress is concentrated. Further, in order to limit the displacement in the height direction, the displacement limiting device 100 needs to hold the outward flange 101a with the inward flange 103a, and accordingly, the height is required. Therefore, the displacement limiting device 100 becomes large and heavy.

Japanese Patent No. 4340680

  An object of the present invention is to provide a displacement limiting device capable of limiting the relative displacement between an upper structure and a lower structure in the event of an earthquake of a predetermined level or more while achieving a reduction in size and weight with a simple structure. And

The displacement limiting device according to the present invention is a displacement limiting device that is installed between an upper structure and a lower structure, and that limits the relative displacement between the upper structure and the lower structure in the event of an earthquake of a predetermined level or higher. . Specifically, the first engaged portion provided so as to be displaced together with the lower structure along the first direction is opposed to the first engaged portion with an appropriate interval in the first direction. A first displacement limiting member having a pair of first engaging portions provided, and a second engaged portion provided so as to be displaced together with the upper structure along a second direction substantially orthogonal to the first direction. The second engaged portion includes a second displacement limiting member having a pair of second engaging portions that are provided to be opposed to each other with an appropriate interval in the second direction. A second engaged portion is disposed between the first engaging portions, and a first engaged portion is disposed between the second engaging portions. That is, the displacement limiting device according to the present invention can be provided so that the first displacement limiting member and the second displacement limiting member are each formed in a substantially U-shape and are entangled with each other. Each second engaging portion is provided with a predetermined interval in the second direction between each second engaged portion, and each first engaging portion is between each second engaged portion. Are provided at a predetermined interval in the first direction. One end of each first engaging portion is joined to the first engaged portion, the other end of each first engaging portion is joined to the first base plate, and one end of each second engaging portion is second engaged. The other end of each second engagement portion is joined to the second base plate.

The displacement limiting device according to the present invention is a displacement limiting device that is installed between an upper structure and a lower structure and limits the relative displacement between the upper structure and the lower structure. Specifically, the first engaged portion provided so as to be displaced together with the lower structure along the first direction, and the first engaged portion are provided so as to be opposed to each other with an interval in the first direction. A first displacement limiting member having a pair of first engaging portions, a second engaged portion provided to be displaced together with the upper structure along a second direction substantially orthogonal to the first direction, The second engaged portion is provided with a second displacement limiting member having a pair of second engaging portions provided to be opposed to each other with an interval in the second direction. A second engaged portion is disposed between the first engaging portions, and a first engaged portion is disposed between the second engaging portions. Each second engaging portion is provided with a predetermined interval in the second direction between each second engaged portion, and each first engaging portion is between each second engaged portion. Are provided at a predetermined interval in the first direction. The upper structure and the lower structure are relatively positioned on the facing surface of the first displacement limiting member facing the second displacement limiting member and / or the facing surface of the second displacement limiting member facing the first displacement limiting member. In the case of displacement, there is provided a buffer portion that abuts against the second displacement limiting member or the first displacement limiting member to plastically deform and absorb energy.

The displacement limiting device according to the present invention is a displacement limiting device that is installed between an upper structure and a lower structure and limits the relative displacement between the upper structure and the lower structure. Specifically, the first engaged portion provided so as to be displaced together with the lower structure along the first direction, and the first engaged portion are provided so as to be opposed to each other with an interval in the first direction. A first displacement limiting member having a pair of first engaging portions, a second engaged portion provided to be displaced together with the upper structure along a second direction substantially orthogonal to the first direction, The second engaged portion is provided with a second displacement limiting member having a pair of second engaging portions provided to be opposed to each other with an interval in the second direction. A second engaged portion is disposed between the first engaging portions, and a first engaged portion is disposed between the second engaging portions. Each second engaging portion is provided with a predetermined interval in the second direction between each second engaged portion, and each first engaging portion is between each second engaged portion. Are provided at a predetermined interval in the first direction. In the first displacement limiting member, the surface of the first engaged portion opposite to the surface on which the first engaging portion is provided is joined to the first base plate, and the second displacement limiting member is connected to the second engaged member. The surface opposite to the surface on which the second engaging portion of the joint portion is provided is joined to the second base plate.

Further, the upper structure and the lower structure are relatively opposed to the opposing surface of the first displacement limiting member facing the second displacement limiting member and / or the opposing surface of the second displacement limiting member facing the first displacement limiting member. In the case of a displacement, a buffer portion that abuts against the second displacement limiting member or the first displacement limiting member to plastically deform and absorb energy may be provided. The buffer portion may include a pair of pieces that increase in distance from each other as the distance from the opposing surface increases. The buffer portion may be formed in an annular shape. A plurality of buffer portions may be provided integrally in the axial direction and / or the height direction of the opposing surface. The buffer portion may include a corrugated plate member. The buffer portion may be provided separately from the first displacement limiting member and the second displacement limiting member, and a filling member provided between the buffer portion and the facing surface may be provided. A pair of protrusions may be provided on the opposing surfaces, and the buffer section may include a low yield point member filled between the pair of protrusions, and a contact member provided integrally with the low yield point member. You may comprise a buffer part with the low yield point member provided in the whole surface or a part of opposing surface. An elastic deformation promoting hole may be formed inside the low yield point member.

Further, when the upper structure and the lower structure are relatively displaced in the first direction, the second engaged portion and the facing surface facing the second engaged portion of the first engaging portion are engaged. When the upper structure and the lower structure are relatively displaced in the second direction, the first engaged portion and the opposing surface of the second engaging portion facing the first engaged portion are engaged. By being combined, the relative displacement between the upper structure and the lower structure is limited. Furthermore, the first displacement limiting member and / or the second displacement limiting member may have a low-strength portion that breaks when an external force exceeding an assumption is applied to the displacement limiting device.

  Further, the low-strength portion may be provided with a reduced cross-sectional area as compared with other regions.

  Furthermore, you may make it provide a 1st to-be-engaged part and a 2nd to-be-engaged part so that length may differ.

  In the displacement limiting device of the present invention, a first engaged portion provided along the first direction, and a pair of first engaging portions provided to the first engaged portion with an appropriate interval therebetween. A first displacement limiting member, a second engaged portion provided along the second direction, and a pair of second engagement members provided opposite to each other with an appropriate interval. A second displacement limiting member having a joint portion, a second engaged portion is disposed between the first engaging portions, a first engaged portion is disposed between the second engaging portions, The displacement limiting member and the second displacement limiting member are each formed in a U-shape and are provided so as to tie each other, for example, the first displacement limiting member and the second displacement limiting of the displacement limiting device of the present invention. When members are installed in the upper structure and the lower structure, respectively, the upper structure and the lower structure are relatively displaced in the first direction. By the second engaged portion and the first engaging portion is engaged, it is possible to restrict the first direction of relative displacement of the upper structure and lower structure.

  In the displacement limiting device of the present invention, when the upper structure and the lower structure are relatively displaced in the second direction, the first engaged portion and the second engaging portion are engaged with each other, so that the upper structure The relative displacement of the object and the substructure in the second direction can be limited. That is, in the displacement limiting device of the present invention, the first displacement limiting member and the second displacement limiting member are each formed in a U-shape and are simply provided so as to tie each other. Displacement can be limited.

  Further, since the displacement limiting device of the present invention is configured with a simple structure as described above, it can be made smaller and lighter than the conventional displacement limiting device. That is, with the displacement limiting device of the present invention, the relative displacement between the upper structure and the lower structure can be limited in the event of an earthquake of a predetermined level or more with a simple structure and a reduction in size and weight.

  Further, the width of the first engaged portion extending in the first direction, the width of the second engaged portion extending in the second direction, and the first engaged portion and the second engaging portion The size of the gap and the size of the gap between the second engaged portion and the first engaging portion can be appropriately set. Therefore, for example, when the first direction is the bridge axis direction and the second direction is the bridge axis perpendicular direction, it is possible to individually set the displacement amount for each direction.

It is sectional drawing which showed the bridge in which the displacement limitation apparatus to which this invention is applied is used. The displacement limiting apparatus of 1st embodiment is shown, (A) is a front view, (B) is a side view, (C) is a perspective view. The displacement limiting apparatus of 1st embodiment is shown, (A) is the top view which showed a mode that the 1st engaging part and the 2nd to-be-engaged part were engaged, (B), It is the top view which showed a mode that the 2nd engaging part and the 1st to-be-engaged part were engaged. The displacement limiting apparatus of 2nd embodiment is shown, (A) is a front view, (B) is a side view, (C) is a perspective view. The displacement limiting apparatus of 2nd Embodiment is shown, (A) is the top view which showed a mode that the 1st engaging part and the 2nd to-be-engaged part were engaged, (B), It is the top view which showed a mode that the 2nd engaging part and the 1st to-be-engaged part were engaged. It is the top view which showed the modification of the displacement limitation apparatus. It is sectional drawing which showed the buffer part. (A)-(H) are all sectional drawings which showed the modification of the buffer part. It is sectional drawing which showed the other modification of the buffer part. (A) is sectional drawing which showed the conventional displacement limiting apparatus, (B) is the front view which showed the displacement limiting apparatus to which this invention is applied. The modification of the displacement limiting apparatus provided with the low intensity | strength part is shown, (A) is a front view, (B) is a cross-sectional view. It is sectional drawing which showed the conventional displacement limiting apparatus.

Hereinafter, a displacement limiting device to which the present invention is applied will be described with reference to the drawings. The displacement limiting device will be described along the following order.
1. 1. Explanation of use state of displacement limiting device 2. Description of displacement limiting device 2-1. Description of the first embodiment 2-2. 2. Description of Second Embodiment 3. Description of comparison with prior art 4. Description of first modification of displacement limiting device Explanation of the second modification of the displacement limiting device

[1. Explanation of the state of use of the displacement limiter]
As shown in FIG. 1, a displacement limiting device 1 to which the present invention is applied is installed between an upper structure 2 and a lower structure 3 in a structure such as a bridge or a structure such as a building. It is installed between the upper structure 2 and the lower structure 3 together with the support device 4 that supports the upper structure 2. When the relative displacement amount between the upper structure 2 and the lower structure 3 exceeds a predetermined value due to an earthquake or the like of a predetermined level or higher, the displacement limiting device 1 determines the relative displacement between the upper structure 2 and the lower structure 3. Restrict. Therefore, the displacement limiting device 1 prevents the support device 4 from being damaged, or prevents the upper structure 2 from falling from the lower structure 3 when the support device 4 is damaged.

  Hereinafter, the case where the displacement limiting device 1 is installed between the bridge girder 2 (upper structure) and the pier 3 (lower structure including an abutment) will be described as an example. The displacement limiting device 1 may be installed between a building other than a bridge or a building (upper structure) and a foundation (lower structure).

[2. Explanation of displacement limiter]
(2-1. Description of First Embodiment)
As shown in FIGS. 2 (A) to 2 (C), a displacement limiting device 1 to which the present invention is applied includes a first displacement limiting member 10 attached to the pier 3 and a second displacement limiting member attached to the bridge girder 2. 20.

  The first displacement limiting member 10 is formed of, for example, steel or the like, and includes a first engaged portion 11 provided along the bridge axis direction X that is the first direction, and the first engaged portion 11. It has a pair of 1st engaging parts 12 and 12 provided so that it might be substantially orthogonal to both sides of a longitudinal direction. That is, the first displacement limiting member 10 is formed in a U shape. Moreover, the 1st to-be-engaged part 11 and the 1st engaging parts 12 and 12 are formed in the cross-sectional rectangular shape, for example.

  In such a first displacement limiting member 10, the first engaged portion 11 is arranged along the bridge axis direction X, and the first engaging portions 12, 12 are welded to the first base plate 13 or bolts and nuts. By being joined by a fastening member or the like, the first base plate 13 is integrally provided. Further, the first displacement limiting member 10 is fastened to the first base plate 13 by a fastening member such as an anchor bolt provided on the pier 3 or a fastening member such as a bolt and a nut, or is joined to the pier 3 by welding or the like. Thus, it is attached to the pier 3.

  The second displacement limiting member 20 is formed of, for example, a steel material, and the second engaged portion 21 provided along the bridge axis perpendicular direction Y that is the second direction, and the second engaged portion 21. And a pair of second engaging portions 22, 22 provided so as to be substantially orthogonal to both sides in the longitudinal direction. That is, the second displacement limiting member 20 is formed in a U shape. Moreover, the 2nd to-be-engaged part 21 and the 2nd engaging parts 22 and 22 are formed in the cross-sectional rectangular shape, for example.

  In such a second displacement limiting member 20, the second engaged portion 21 is disposed between the first engaging portions 12, 12 of the first displacement limiting member 10 and is disposed along the direction Y perpendicular to the bridge axis. The second engaging portions 22 and 22 are integrally provided on the second base plate 23 by being joined to the second base plate 23 by a fastening member such as welding or a bolt and a nut. Further, the second displacement limiting member 20 is attached to the bridge girder 2 by the second base plate 23 being fastened by a fastening member such as an anchor bolt provided on the bridge girder 2 or being joined to the bridge girder 2 by welding or the like. ing.

  That is, in the displacement limiting device 1, the first displacement limiting member 10 and the second displacement limiting member 20 are each formed in a U shape, and further, the second engaged portion 21 is provided between the first engaging portions 12 and 12. It arrange | positions and it is provided so that it may mutually tie up by arrange | positioning the 1st to-be-engaged part 11 between the 2nd engaging parts 22 and 22. FIG.

  Then, as shown in FIG. 3A, the displacement limiting device 1 is configured such that when the bridge girder 2 and the pier 3 are relatively displaced in the bridge axis direction X by a predetermined value or more due to an earthquake or the like of a predetermined level or more, one first engagement is performed. By engaging the portion 12 and the second engaged portion 21, the displacement of the bridge girder 2 and / or the bridge pier 3 in the bridge axis direction X can be limited. Further, as shown in FIG. 3 (B), the displacement limiting device 1 is configured such that when the bridge girder 2 and the pier 3 are relatively displaced in a direction Y perpendicular to the bridge axis by a predetermined value or more due to an earthquake or the like of a predetermined level or higher, The displacement of the bridge girder 2 and / or the pier 3 in the direction perpendicular to the bridge axis Y can be limited by the engagement of the joint portion 22 and the first engaged portion 11.

  The width of the first engaged portion 11, the width of the second engaged portion 21, the size of the gap between the first engaged portion 11 and the second engaging portions 22, 22, and the second The size of the gap between the engaged portion 21 and the first engaging portions 12 and 12 can be set as appropriate, and the displacement amount can be set in each of the bridge axis direction X and the bridge axis perpendicular direction Y. It can be set individually as appropriate.

  Furthermore, the displacement limiting device 1 engages the first engaged portion 11 and the second engaged portion 21 when the bridge girder 2 is displaced in the height direction by a predetermined value or more due to an earthquake of a predetermined level or higher. Therefore, the displacement of the bridge girder 2 in the height direction can be limited.

  The displacement limiting device 1 may be configured such that the first engaged portion 11 is provided along the bridge axis perpendicular direction Y and the second engaged portion 21 is provided along the bridge axis direction X. Further, the displacement limiting device 1 tilts the first engaged portion 11 and the second engaged portion 21 from the bridge axis direction X or the bridge axis perpendicular direction Y by a predetermined angle such as 45 degrees or −45 degrees, for example. It may be provided. At this time, the displacement limiting device 1 may be configured such that the first base plate 13 and the second base plate 23 are attached to the bridge girder 2 or the pier 3 while being inclined. Alternatively, the displacement limiting device 1 may be configured such that the first displacement limiting member 10 is attached to the first base plate 13 while being inclined, and the second displacement limiting member 20 is attached to the second base plate 23 while being inclined.

  Further, the displacement limiting device 1 may be provided so that the length of the first engaged portion 11 and the length of the second engaged portion 21 are different. At this time, the first engaged portion 11 may be provided to be longer than the second engaged portion 21 or may be provided to be shorter. More preferably, the second engaged portion 21 is provided longer than the first engaged portion 11 and along the bridge axis direction X, and the first engaged portion 11 is along the bridge axis perpendicular direction Y. Provide as follows. In such a case, the second engaged portion 21 of the second displacement limiting member 20 attached to the bridge girder 2 is provided long, and the first engaged portion 11 of the first displacement limiting member 10 attached to the pier 3 is provided. By being provided short, the first base plate 13 of the pier 3 can be made smaller than when the first engaged portion 11 is provided longer. Therefore, in the case of newly installing a bridge or a substructure, etc., it is possible to avoid widening of the bridge seat width due to the size of the displacement limiting device, and the width in the bridge axis direction of the first base plate 13 is reduced. Interference with other members can be avoided, space saving and workability are good. In addition, since the width of the second base plate 23 in the direction perpendicular to the bridge axis can be reduced by adopting such a configuration, for example, the main girder of the existing upper structure to which the second base plate 23 is attached. In the attachment to the flange, there is no need for work such as widening of the flange width of the predetermined main girder flange, so that workability is better and inexpensive construction is possible.

  The displacement limiting device 1 may be directly attached to the pier 3 without disposing the first displacement limiting member 10 on the first base plate 13. Furthermore, the displacement limiting device 1 may be directly attached to the bridge girder 2 without arranging the second displacement limiting member 20 on the second base plate 23.

  As described above, in the displacement limiting device 1 of the present invention, the first displacement limiting member 10 and the second displacement limiting member 20 are each formed in a U shape and are provided so as to be entangled with each other. Displacement in multiple directions can be limited.

  Further, in the displacement limiting device 1 of the present invention, when the first engaging portion 12 and the second engaged portion 21 are engaged to limit the relative displacement of the bridge girder 2 and the bridge pier 3 in the bridge axis direction X, The first engaging portion 12 and the second engaged portion 21 are in surface contact. Furthermore, in the displacement limiting device 1 of the present invention, when the second engaging portion 22 and the first engaged portion 11 are engaged to limit the relative displacement of the bridge girder 2 and the bridge pier 3 in the direction perpendicular to the bridge axis Y. The second engaging portion 22 and the first engaged portion 11 are in surface contact. Therefore, in the displacement limiting device 1 of the present invention, it is possible to prevent stress from being concentrated as in the conventional displacement limiting device 100.

  In addition, since the displacement limiting device 1 of the present invention has a simple structure as described above, it can be made smaller and lighter than the conventional displacement limiting device 100.

(2-2. Description of Second Embodiment)
Next, the displacement limiting device 30 according to the second embodiment will be described. In addition, about what has the same function as the displacement limitation apparatus 1 in 1st embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted and only a different structure is demonstrated.

  In the displacement limiting device 30, in the displacement limiting device 1, the first engaging portions 12 and 12 of the first displacement limiting member 10 are integrally provided on the first base plate 13, and the second engaging portion of the second displacement limiting member 20 is provided. Whereas 22 and 22 are integrally provided on the second base plate 23, as shown in FIGS. 4A to 4C, the first engaged portion 11 of the first displacement limiting member 10 is provided. Is provided integrally with the first base plate 13, and the second engaged portion 21 of the second displacement limiting member 20 is provided integrally with the second base plate 23.

  Specifically, in the first displacement limiting member 10, the first engaged portion 11 is disposed along the bridge axis direction X, and the first engaged portion 11 is welded to the first base plate 13, a bolt, a nut, or the like. The first base plate 13 is integrally provided by being joined by a fastening member or the like.

  The second displacement limiting member 20 is disposed along the bridge axis perpendicular direction Y while the second engaged portion 21 is disposed between the first engaging portions 12 and 12 of the first displacement limiting member 10. The second engaged portion 21 is integrally provided on the second base plate 23 by being joined to the second base plate 23 by welding or a fastening member such as a bolt and a nut.

  That is, also in the displacement limiting device 30, the first displacement limiting member 10 and the second displacement limiting member 20 are each formed in a U shape, and the second engaged portion 21 is further interposed between the first engaging portions 12 and 12. Is disposed, and the first engaged portion 11 is disposed between the second engaging portions 22 and 22 so as to be entangled with each other.

  Then, as shown in FIG. 5A, when the bridge girder 2 and the pier 3 are relatively displaced in the bridge axis direction X by a predetermined value or more due to an earthquake of a predetermined level or more, as shown in FIG. By engaging the portion 12 and the second engaged portion 21, the relative displacement of the bridge girder 2 and the pier 3 in the bridge axis direction X can be limited. In addition, as shown in FIG. 5B, the displacement limiting device 30 is configured such that when the bridge girder 2 and the pier 3 are relatively displaced in a direction Y perpendicular to the bridge axis by a predetermined value or more due to an earthquake or the like of a predetermined level or more, The relative displacement of the bridge girder 2 and the bridge pier 3 in the direction perpendicular to the bridge axis Y can be limited by the engagement of the joint portion 22 and the first engaged portion 11.

  In the displacement limiting device 30 of the present invention, the first engaged portion 11 is provided along the bridge axis perpendicular direction Y, and the second engaged portion 21 is provided along the bridge axis direction X. Also good. Further, the displacement limiting device 30 tilts the first engaged portion 11 and the second engaged portion 21 from the bridge axis direction X or the bridge axis perpendicular direction Y by a predetermined angle such as 45 degrees or −45 degrees, for example. It may be provided.

  Furthermore, the displacement limiting device 30 may be provided so that the length of the first engaged portion 11 and the length of the second engaged portion 21 are different. At this time, the first engaged portion 11 may be provided to be longer than the second engaged portion 21 or may be provided to be shorter. More preferably, the second engaged portion 21 is provided longer than the first engaged portion 11 and along the bridge axis direction X, and the first engaged portion 11 is along the bridge axis perpendicular direction Y. Provide as follows. In such a case, the second engaged portion 21 of the second displacement limiting member 20 attached to the bridge girder 2 is provided long, and the first engaged portion 11 of the first displacement limiting member 10 attached to the pier 3 is provided. By providing it short, the bridge-axis direction width | variety of the 1st base board 13 of the bridge pier 3 can be made smaller than the case where the direction of the 1st to-be-engaged part 11 is provided long. Furthermore, by providing the second engaged portion 21 longer than the first engaged portion 11 so as to be along the bridge axis direction X, the other members arranged mainly adjacent to the direction perpendicular to the bridge axis Interference can be avoided, space saving and workability are also good.

  Further, the displacement limiting device 30 may be configured to attach the first displacement limiting member 10 directly to the pier 3 without using the first base plate 13. Furthermore, the displacement limiting device 30 may be configured to attach the second displacement limiting member 20 directly to the bridge girder 2 without using the second base plate 23.

  As described above, the displacement limiting device 30 of the present invention has a simple structure in which the first displacement limiting member 10 and the second displacement limiting member 20 are each formed in a U shape and are entangled with each other. The displacement in the direction of can be limited.

  Further, in the displacement limiting device 30 of the present invention, when the first engaging portion 12 and the second engaged portion 21 are engaged to limit the relative displacement of the bridge girder 2 pier 3 in the bridge axis direction X, One engaging portion 12 and the second engaged portion 21 are in surface contact. Furthermore, in the displacement limiting device 30 of the present invention, when the second engaging portion 22 and the first engaged portion 11 are engaged to limit the relative displacement of the bridge girder 2 and the bridge pier 3 in the direction perpendicular to the bridge axis Y. The second engaging portion 22 and the first engaged portion 11 are in surface contact. Therefore, in the displacement limiting device 30 of the present invention, it is possible to prevent stress from being concentrated as in the conventional displacement limiting device 100.

  In addition, since the displacement limiting device 30 of the present invention has a simple structure as described above, it can be made smaller and lighter than the conventional displacement limiting device 100.

[3. Explanation of comparison with conventional technology]
In the displacement limiting devices 1 and 30 of the present invention, as shown in comparison with FIGS. 10A and 10B, the bottom surface of the inward flange 103a of the conventional displacement limiting device 100 and the abutment 102 (lower stopper) The height can be made lower than that of the conventional displacement limiting device 100 by the gap H between the upper surface of the lower base plate 101). Therefore, the displacement limiting devices 1 and 30 of the present invention can be smaller in the height direction than the conventional displacement limiting device 100, and the overall weight can be reduced.

  Further, as shown in FIG. 10A, in the conventional displacement limiting device 100, the inward flange 103a of the upper stopper 103 is provided so as to hold the outward flange 101a of the lower stopper 101. Or the clearance W1 between the inward flange 103a and the lower stopper 101, which is an escape portion to prevent the relative displacement between the bridge girder 2 and the pier 3 from being restricted during an earthquake up to a predetermined level, and the relative displacement in the height direction. An overlapping portion W2 between the outward flange 101a and the inward flange 103a for limiting, and an outward flange 101a that is an escape portion for preventing the outward flange 101a and the upper stopper 103 from contacting each other And the gap W3 between the upper stopper 103 and the upper stopper 103 must be provided in a plane. On the other hand, in the displacement limiting devices 1 and 30 of the present invention, as shown in FIG. 10 (B), between the first displacement limiting member 10 and the second displacement limiting member 20, it is always on the plane. Alternatively, only the gap W4 (gap W1 in the displacement limiting device 100), which is a relief portion, is provided to prevent the relative displacement between the bridge girder 2 and the pier 3 from being limited during an earthquake up to a predetermined level. Therefore, in the displacement limiting devices 1 and 30 of the present invention, the size can be reduced in plan view compared to the conventional displacement limiting device 100, and the overall weight can be reduced.

[4. Description of First Modification of Displacement Limiting Device]
Next, a first modification of the displacement limiting devices 1 and 30 according to the first and second embodiments will be described. In addition, about what has the same function as the displacement limitation apparatuses 1 and 30 mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted and only a different structure is demonstrated.

  Specifically, as shown in FIG. 6, the facing surface of the first displacement limiting member 10 facing the second displacement limiting member 20 and / or the facing of the second displacement limiting member 20 facing the first displacement limiting member 10. A buffer portion 40 is provided on the surface. The buffer portion 40 includes, for example, opposing surfaces 12 a and 12 a that face the second engaged portion 21 of the first engaging portions 12 and 12 of the first displacement limiting member 10, and a second relationship of the second displacement limiting member 20. The joint portions 22 and 22 are integrally provided on the opposing surfaces 22a and 22a facing the first engaged portion 11.

  The buffer part 40 is comprised with a pair of piece, for example, as shown in FIG. For example, the pair of pieces are provided in a C shape in which the tip portions gradually approach each other as they are separated from the facing surfaces 12a and 22a, and have flexibility and / or elasticity. When the first displacement limiting member 10 or the second displacement limiting member 20 is brought into contact with a force equal to or greater than a predetermined value, the buffer 40 deforms to the facing surfaces 12a and 22a and Absorbs shock.

  Further, the buffer 40 absorbs an installation error or the like of the plurality of displacement limiting devices 1 and 30 installed between the bridge girder 2 and the pier 3 and concentrates an impact on the specific displacement limiting devices 1 and 30. Is prevented from being added. That is, the rigidity is lowered while the buffer portion 40 is deformed before the displacement limiting devices 1 and 30 themselves are broken. And the amount of deformation that each displacement limiting device can yield is set to be larger than the sum of the amount of deformation that can yield, before any displacement limiting device receiving the input is damaged, Also, a load such as an impact can be distributed, and only a specific displacement limiting device is configured not to be damaged first.

  As shown in FIG. 8A, the buffer portion 40 may be provided in a K-shape in which the tip portions are gradually separated as the pair of pieces are separated from the opposing surfaces 12a and 22a. Moreover, you may make it provide the buffer part 40 in the cyclic | annular form (D shape) which has the through-hole 41, as shown to FIG. 8 (B). Furthermore, as shown in FIG. 8C, a plurality of buffer portions 40 may be integrally provided in the width direction and / or the height direction of the facing surfaces 12a and 22a. Even in the case of the buffer unit 40 as described above, the buffer unit 40 can be deformed to absorb an impact and to absorb an error.

  Further, as shown in FIGS. 8D and 8E, the buffer 40 may be provided separately from the first displacement limiting member 10 and the second displacement limiting member 20. For example, as shown in FIG. 8D, the buffer portion 40 may be provided with a plate member in a wave shape and attached to the facing surfaces 12a and 22a with a fastening member such as a bolt, welding, an adhesive, or the like. Further, as shown in FIG. 8 (E), a filling member 42 made of urethane foam, low yield point steel, or the like is provided between the shock-absorbing portion 40 provided separately and the opposing surfaces 12a, 22a. May be.

  Further, as shown in FIG. 8 (F), the buffer portion 40 includes a low yield point member 44 filled between a pair of projecting portions 43, 43 provided on the opposing surfaces 12a, 22a, and a low yield point member 44. The contact member 45 may be formed integrally with the contact member 45. Even in such a buffer portion 40, when the first displacement limiting member 10 or the second displacement limiting member 20 is brought into contact with the contact member 45, the low yield point member 44 yields to absorb the impact. In addition, the error can be absorbed. Further, as shown in FIG. 8 (G), the buffer 40 is in contact with the protrusion 46 provided on the facing surfaces 12a and 22a and the protrusion 46 integrally provided via the low yield point member 47. You may make it comprise with the member 48. FIG. Even in such a buffer portion 40, when the first displacement limiting member 10 or the second displacement limiting member 20 is brought into contact with the contact member 48, the low yield point member 47 yields to absorb the impact. In addition, the error can be absorbed.

  Further, even when the buffer portion 40 is provided separately, a plurality of the buffer portions 40 may be attached in the width direction and / or the height direction of the facing surfaces 12a and 22a.

  Further, as shown in FIG. 8H, the buffer 40 may be configured by only the low yield point member 49. The low yield point member 49 is provided on the entire surface or a part of the opposing surfaces 12a and 22a. Even in such a buffer portion 40, when the first displacement limiting member 10 or the second displacement limiting member 20 is brought into contact, the low yield point member 49 yields, thereby absorbing an impact and absorbing an error. I can do it. Here, the material of the buffer portion 40 is not limited to the low yield point member 49, but the configuration of the buffer portion 40 includes a plurality of members inside as shown in FIGS. 9A and 9B. It may be such that a single elastic deformation promoting hole 50 is formed. Such a low yield point member 49 can disperse input over a wider range than a non-porous body. At this time, each portion to which stress is applied has a smaller amount of elastic deformation by the amount of the dispersed stress, and buckling and yielding can be avoided. Therefore, even when an impact is input multiple times, the unyielded portion can buffer the impact every time the impact is input, and it is possible to obtain a buffering property against repeated input. The low yield point member 49 may be used as the filling member 42 or the low yield point members 44 and 47 described above. Furthermore, you may make it the buffer part 40 be comprised only with synthetic rubbers, such as chloroprene rubber. Further, synthetic rubber may be used as the filling member 42 and the low yield point members 44 and 47 described above.

  Further, the buffer portion 40 is not limited to being provided on the facing surfaces 12a and 22a, but instead of or in addition to the facing surfaces 12a and 22a, the first engaged portion of the first displacement limiting member 10 11 facing the second engaging portion 22, the facing surface facing the first engaging portion 12 of the second engaged portion 21 of the second displacement limiting member 20 (see FIG. 11), the first displacement limiting The opposing surface of the first engaged portion 11 of the member 10 facing the second engaged portion 21 and the opposing surface of the second displacement limiting member 20 facing the first engaged portion 11 of the second engaged portion 21. It may be provided on a surface or the like. Furthermore, as shown in FIG. 11 (B), one or a plurality of buffer portions 40 may be provided over these entire surfaces. Thereby, even if it is a case where the bridge girder 2 and the bridge pier 3 are relatively displaced in the bridge-axis direction X or the bridge-axis perpendicular direction Y, the buffer part 40 can absorb an impact and can absorb an error. Furthermore, you may make it provide the buffer part 40 in one or more in part in these opposing surfaces.

[5. Description of Second Modification of Displacement Limiting Device]
Next, a displacement limiting device 60 that is a second modification of the displacement limiting devices 1 and 30 will be described. In addition, about what has the same function as the displacement limitation apparatuses 1 and 30 mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted and only a different structure is demonstrated.

  As shown in FIGS. 11 (A) and 11 (B), the displacement limiting device 60 includes a low-strength portion 70 having a lower structural strength than the other components of the displacement limiting device 60. Is provided. For example, the low-strength portion 70 is provided in the second engaged portion 21 so as to have a smaller cross-sectional area than other regions. Here, the low-strength portion 70 is, for example, a groove-shaped (notched) concave portion in the vicinity of the second engaging portion 22 on both side surfaces facing the first engaged portion 11 of the second engaged portion 21. By forming one or a plurality of 71, the cross-sectional area is smaller than the other area of the second engaged portion 21.

  Further, the low-strength portion 70 is provided so that the structural strength is lower than that of the other components of the displacement limiting device 60. Specifically, the low strength portion 70 includes the first engaged portion 11, the first engaging portion 12, the first base plate 13 of the first displacement limiting member 10, and the second engagement of the second displacement limiting member 20. The joint portion 22 and the second base plate 23, and the joint strength between the first displacement limiting member 10 and the first base plate 13 (the bolt and nut that fasten the first displacement limiting member 10 and the first base plate 13, the first The welding strength between the displacement limiting member 10 and the first base plate 13), the joint strength between the first base plate 13 and the pier 3 (anchor bolt 80 for fastening the first base plate 13 to the pier 3, the first base plate 13, The welding strength of the pier 3), the bonding strength between the second displacement limiting member 20 and the second base plate 23 (the bolt 81a and the nut 81b for fastening the second displacement limiting member 20 and the second base plate 23, the second displacement). Welding strength between the limiting member 20 and the second base plate 23), and the second base The structural strength is lower than the bonding strength between the plate 23 and the bridge girder 2 (the bolt 82a and the nut 82b for fastening the second base plate 23 to the bridge girder 2 and the welding strength of the second base plate 23 to the bridge girder 2). Is provided. In other words, the other constituent members of the displacement limiting device 1 are provided so that the structural strength is higher than that of the low-strength portion 70.

  In the displacement limiting device 60 having the above-described configuration, the second displacement limiting member 20 is provided with a low-strength portion 70 having a lower structural strength than other components of the displacement limiting device 60. Therefore, for example, when an external force (load) less than a specific assumption is applied, the displacement limiting device 60 does not break the low-strength portion 70, but an external force (load) exceeding a specific assumption is applied. In such a case, the low strength portion 70 is broken. Therefore, when an external force (load) exceeding a specific assumption is applied, the displacement limiting device 60 can quickly and without damaging the bridge girder 2 and the pier 3 by breaking the low-strength portion 70. It is possible to lose the function and maintain the durability of the entire bridge in the event of an earthquake exceeding the expected level.

  In addition, the recessed part 71 is not limited to being formed in the vicinity of the second engaging part 22 on the side surface of the second engaged part 21 of the second displacement limiting member 20, but the second engaged part 21 may be formed substantially at the center portion of the side surface of the second engaging portion 21 as long as it is formed on at least one of the upper surface, the lower surface, and the side surface of the second engaged portion 21, and may be formed over the entire surface. . Further, the recess 71 may be formed in any shape such as a V shape, a U shape, or a rectangular shape. Further, the recess 71 is not limited to being a groove (notch), and may be a hole such as a recess or a through hole.

  Further, the low strength portion 70 may be provided in the second engagement portion 22 by forming a recess 71 in the second engagement portion 22 of the second displacement limiting member 20. Even in such a case, the low-strength portion 70 is provided to have a smaller cross-sectional area than other regions of the second engagement portion 22 and has a structure greater than that of the other constituent members of the displacement limiting device 60. By providing an external force (load) exceeding a specific assumption, the bridge girder 2 and the pier 3 are not damaged by breaking when an external force (load) exceeding a specific assumption is applied to the displacement limiting device 60. The function of the displacement limiting device 60 can be quickly lost, and the durability of the entire bridge at the time of an earthquake exceeding the assumption can be maintained.

  Further, without forming the recess 71 in the second engaged portion 21 or the second engaging portion 22 of the second displacement limiting member 20, the bonding strength between the second displacement limiting member 20 and the second base plate 23 (first The bolt 81a and the nut 81b that fasten the two displacement limiting member 20 and the second base plate 23, and the welding strength between the second displacement limiting member 20 and the second base plate 23) are compared with other components of the displacement limiting device 60. Alternatively, the low strength portion 70 may be provided so that the structural strength is reduced and the joint between the second displacement limiting member 20 and the second base plate 23 is provided.

  For example, when the second displacement limiting member 20 and the second base plate 23 are fastened by the bolt 81a and the nut 81b, the low strength portion 70 is the bolt 81a, and the diameter of the bolt 81a is reduced or the number of the bolts 81a is reduced. Is provided so that the structural strength is lower than that of the other constituent members of the displacement limiting device 60. Further, when the second displacement limiting member 20 and the second base plate 23 are welded, the low-strength portion 70 is a welding point between the second displacement limiting member 20 and the second base plate 23, and the number of welding points is reduced. Or by providing a slit in the welded portion, etc., so that the structural strength is lower than that of the other components of the displacement limiting device 60.

  Even in such a case, the low-strength portion 70 breaks when an external force (load) exceeding a specific assumption is applied to the displacement limiting device 60, thereby damaging the bridge girder 2 and the pier 3. Without giving, the function of the displacement limiting device 60 can be quickly lost, and the durability of the entire bridge at the time of an earthquake exceeding the assumption can be maintained.

  Further, without forming the recess 71 in the second engaged portion 21 or the second engaging portion 22 of the second displacement limiting member 20, the bonding strength between the second base plate 23 and the bridge beam 2 (second base plate 23). Bolts 82a and nuts 82b, and welding strength between the second base plate 23 and the bridge girder 2) are provided so that the structural strength is lower than the other components of the displacement limiting device 60, The joint between the two base plate 23 and the bridge girder 2 may be the low strength portion 70.

  For example, when the second base plate 23 and the bridge girder 2 are fastened with bolts 82a and nuts 82b, the low-strength portion 70 is the bolt 82a, and the diameter of the bolt 82a is reduced or the number of bolts 82a is reduced. The displacement limiting device 60 is provided so as to have a lower structural strength than the other components. Furthermore, when welding the 2nd base board 23 and the bridge girder 2, the low intensity | strength part 70 is a welding location of the 2nd base board 23 and the bridge girder 2, and reduces a welding location or puts a slit in a welding location. For example, it is provided so that the structural strength is lower than that of the other components of the displacement limiting device 60.

  Even in such a case, the low-strength portion 70 breaks when an external force (load) exceeding a specific assumption is applied to the displacement limiting device 60, thereby damaging the bridge girder 2 and the pier 3. Without giving, the function of the displacement limiting device 60 can be quickly lost, and the durability of the entire bridge at the time of an earthquake exceeding the assumption can be maintained.

  Further, the low-strength portion 70 is not limited to being provided on the second displacement limiting member 20, and may be provided on the first displacement limiting member 10. In such a case, the recess 71 is formed in the first engaged portion 11 or the first engaging portion 12 in the same manner as when the second displacement limiting member 20 is provided, so that the cross-sectional area is reduced, You may make it provide structural strength lower than a structural member. Further, the bonding strength between the first displacement limiting member 10 and the first base plate 13 (bolts and nuts that fasten the first displacement limiting member 10 and the first base plate 13, the first displacement limiting member 10 and the first base plate). 13) may be provided such that the structural strength is lower than that of the other components of the displacement limiting device 60. Further, the bonding strength between the first base plate 13 and the pier 3 (anchor bolt 80, bolt and nut for fastening the first base plate 13 to the pier 3 and the welding strength between the first base plate 13 and the pier 3) is changed. You may make it provide so that structural strength may become lower than the other structural member of the limiting device 60. FIG.

  Even in such a case, the low-strength portion 70 breaks when an external force (load) exceeding a specific assumption is applied to the displacement limiting device 60, thereby damaging the bridge girder 2 and the pier 3. Without giving, the function of the displacement limiting device 60 can be quickly lost, and the durability of the entire bridge at the time of an earthquake exceeding the assumption can be maintained.

  Further, the low-strength portion 70 is provided integrally with the first base plate 13 with the first engaging portions 12 and 12 of the first displacement limiting member 10 like the displacement limiting device 1 of the first embodiment. It is not limited to applying the second engaging portions 22 and 22 of the two displacement limiting member 20 integrally to the second base plate 23, but like the displacement limiting device 30 of the second embodiment. The first engaged portion 11 of the first displacement limiting member 10 is provided integrally with the first base plate 13, and the second engaged portion 21 of the second displacement limiting member 20 is integrated with the second base plate 23. It can also be applied to what is provided.

  When the low-strength portion 70 is provided in the displacement limiting device 30 of the second embodiment, the first cover is provided in the same manner as when the low-strength portion 70 is provided in the displacement limiting device 1 of the first embodiment. The concave portion 71 is formed in the engaging portion 11, the first engaging portion 12, the second engaged portion 21, and the second engaging portion 22, so that the cross-sectional area is reduced, and the structural strength is higher than other components. May be provided low.

  Further, the bonding strength between the first displacement limiting member 10 and the first base plate 13 (bolts and nuts that fasten the first displacement limiting member 10 and the first base plate 13, the first displacement limiting member 10 and the first base plate). 13), the bonding strength between the second displacement limiting member 20 and the second base plate 23 (the bolt 81 a and the nut 81 b that fasten the second displacement limiting member 20 and the second base plate 23, the second displacement). The welding strength between the limiting member 20 and the second base plate 23) may be provided so that the structural strength is lower than that of the other constituent members.

  Furthermore, the joint strength between the first base plate 13 and the pier 3 (anchor bolts 80, bolts and nuts for fastening the first base plate 13 to the pier 3, the welding strength between the first base plate 13 and the pier 3), The joint strength between the two base plates 23 and the bridge girder 2 (the bolt 82a and the nut 82b for fastening the second base plate 23 to the bridge girder 2 and the welding strength between the second base plate 23 and the bridge girder 2) is higher than that of other components. You may make it provide so that structural strength may become low.

  In any of these cases, the low-strength portion 70 breaks when the external force (load) exceeding a specific assumption is applied to the displacement limiting device 60, thereby causing the bridge girder 2 and the pier 3 to Without damaging, the function of the displacement limiting device 60 can be quickly lost, and the durability of the entire bridge at the time of an earthquake exceeding the assumption can be maintained.

  Furthermore, as shown in FIGS. 11A and 11B, the displacement limiting device 60 is provided with a low-strength portion 70, and similarly to the displacement limiting devices 1 and 30, the first displacement limiting member. The buffer portion 40 may be provided on the opposing surface facing the second displacement limiting member 10 and / or the opposing surface facing the first displacement limiting member 10 of the second displacement limiting member 20.

  Furthermore, as shown in FIGS. 11 (A) and 11 (B), the displacement limiting device 60 is provided with a low-strength portion 70. You may provide so that the length of the part 11 and the length of the 2nd to-be-engaged part 21 may differ. At this time, the first engaged portion 11 may be provided to be longer than the second engaged portion 21 or may be provided to be shorter. More preferably, the second engaged portion 21 is provided longer than the first engaged portion 11 and along the bridge axis direction X, and the first engaged portion 11 is along the bridge axis perpendicular direction Y. Provide as follows. In such a case, the second engaged portion 21 of the second displacement limiting member 20 attached to the bridge girder 2 is provided long, and the first engaged portion 11 of the first displacement limiting member 10 attached to the pier 3 is provided. By providing it short, the bridge-axis direction width | variety of the 1st base board 13 of the bridge pier 3 can be made smaller than the case where the direction of the 1st to-be-engaged part 11 is provided long. Furthermore, by providing the second engaged portion 21 longer than the first engaged portion 11 so as to be along the bridge axis direction X, the other members arranged mainly adjacent to the direction perpendicular to the bridge axis Interference can be avoided, space saving and workability are also good.

DESCRIPTION OF SYMBOLS 1 Displacement limiting device, 2 Upper structure, 3 Lower structure, 4 Bearing apparatus, 10 1st displacement limiting member, 11 1st to-be-engaged part, 12 1st engaging part, 12a Opposing surface, 13 1st base board , 20 second displacement limiting member, 21 second engaged portion, 22 second engaging portion, 22a facing surface, 23 second base plate, 30 displacement limiting device, 40 buffer portion, 41 through hole, 42 filling member, 43 Projection, 44 Low Yield Point Member, 45 Contact Member, 46 Projection, 47 Low Yield Point Member, 48 Contact Member, 49 Low Yield Point Member, 50 Elastic Deformation Promotion Hole, 60 Displacement Limiting Device, 70 Low Strength , 71 recess, 80 anchor bolt, 81a bolt, 81b nut, 82a bolt, 82b nut, 100 displacement limiter, 101 lower stopper, 101a outward flange, 102 abutment, 103 top Stopper, 103a inward flange 104 girders

Claims (17)

In a displacement limiting device that is installed between an upper structure and a lower structure and limits the relative displacement between the upper structure and the lower structure,
A first engaged portion provided so as to be displaced along with the lower structure along a first direction, and a pair of first provided opposite to the first engaged portion with an interval in the first direction A first displacement limiting member having one engaging portion;
A second engaged portion provided so as to be displaced together with the upper structure along a second direction substantially perpendicular to the first direction, and a relative distance from the second engaged portion with a gap in the second direction. And a second displacement limiting member having a pair of second engaging portions provided as
The second engaged portion is disposed between the first engaging portions, and the first engaged portion is disposed between the second engaging portions ,
Each of the second engaging portions is provided with a predetermined interval in the second direction between each of the second engaged portions,
Each of the first engaging portions is provided at a predetermined interval in the first direction between the second engaged portions,
One end of each first engaging portion is joined to the first engaged portion, and the other end of each first engaging portion is joined to the first base plate,
One end of each said 2nd engaging part is joined to said 2nd to-be-engaged part, and the other end of each said 2nd engaging part is joined to the 2nd base board, The displacement limiting apparatus characterized by the above-mentioned . In a displacement limiting device that is installed between an upper structure and a lower structure and limits the relative displacement between the upper structure and the lower structure,
A first engaged portion provided so as to be displaced along with the lower structure along a first direction, and a pair of first provided opposite to the first engaged portion with an interval in the first direction A first displacement limiting member having one engaging portion;
A second engaged portion provided so as to be displaced together with the upper structure along a second direction substantially perpendicular to the first direction, and a relative distance from the second engaged portion with a gap in the second direction. And a second displacement limiting member having a pair of second engaging portions provided as
The second engaged portion is disposed between the first engaging portions, and the first engaged portion is disposed between the second engaging portions ,
Each of the second engaging portions is provided with a predetermined interval in the second direction between each of the second engaged portions,
Each of the first engaging portions is provided at a predetermined interval in the first direction between the second engaged portions,
The upper structure and the lower structure are provided on an opposing surface of the first displacement limiting member facing the second displacement limiting member and / or an opposing surface of the second displacement limiting member facing the first displacement limiting member. A displacement limiting device is provided that includes a buffer portion that abuts against the second displacement limiting member or the first displacement limiting member to plastically deform and absorb energy when they are relatively displaced . In a displacement limiting device that is installed between an upper structure and a lower structure and limits the relative displacement between the upper structure and the lower structure,
A first engaged portion provided so as to be displaced along with the lower structure along a first direction, and a pair of first provided opposite to the first engaged portion with an interval in the first direction A first displacement limiting member having one engaging portion;
A second engaged portion provided so as to be displaced together with the upper structure along a second direction substantially perpendicular to the first direction, and a relative distance from the second engaged portion with a gap in the second direction. And a second displacement limiting member having a pair of second engaging portions provided as
The second engaged portion is disposed between the first engaging portions, and the first engaged portion is disposed between the second engaging portions,
Each of the second engaging portions is provided with a predetermined interval in the second direction between each of the second engaged portions,
Each of the first engaging portions is provided at a predetermined interval in the first direction between the second engaged portions,
In the first displacement limiting member, the surface of the first engaged portion opposite to the surface on which the first engaging portion is provided is joined to the first base plate,
The second displacement limiting member is characterized in that a surface of the second engaged portion opposite to the surface on which the second engaging portion is provided is joined to a second base plate. apparatus. The upper structure and the lower structure are provided on an opposing surface of the first displacement limiting member facing the second displacement limiting member and / or an opposing surface of the second displacement limiting member facing the first displacement limiting member. If There was relatively displaced, the displacement restriction of claim 1 or 3, characterized in that the buffer section for absorbing the abutting energy to the second displacement restriction member or the first displacement restriction member is provided apparatus. The displacement limiting device according to claim 2, wherein the buffer portion includes a pair of pieces whose distance increases as the distance from the facing surface increases. The displacement limiting device according to claim 2, wherein the buffer portion is formed in an annular shape. The displacement limiting device according to claim 2 or 4, wherein a plurality of the buffer portions are integrally provided in the axial direction and / or the height direction of the facing surface. The displacement limiting device according to claim 2, wherein the buffer portion includes a corrugated plate member. The buffer portion is provided separately from the first displacement limiting member and the second displacement limiting member,
  The displacement limiting device according to claim 2, further comprising a filling member provided between the buffer portion and the facing surface. A pair of protrusions is provided on the facing surface,
The said buffer part is provided with the low yield point member with which it filled between the said one pair of protrusion parts, and the contact member integrally provided in the said low yield point member, The Claim 2 or Claim 4 characterized by the above-mentioned. The displacement limiting device according to 1. The opposing surface is provided with a protrusion,
The displacement limiting device according to claim 2, wherein the buffer portion includes an abutting member provided integrally with the protrusion via a low yield point member. 5. The displacement limiting device according to claim 2, wherein the buffer portion includes a low yield point member provided on the entire surface or a part of the facing surface. The displacement limiting device according to claim 12, wherein an elastic deformation promoting hole is formed inside the low yield point member. In the displacement limiting device, when the upper structure and the lower structure are relatively displaced in the first direction, the second engaged portion of either the second engaged portion or the first engaged portion. a facing surface facing the are engaged, when the lower structure and the upper structure is relatively displaced in the second direction, one of said of said first engaged portion and the second engagement portion first 14. The relative displacement between the upper structure and the lower structure is limited by engaging an opposing surface that faces the one engaged portion. 14 . Displacement limiting device. It said first displacement limiting member and / or the second displacement limiting member, according to claim 1 to 14, characterized in that it has a low strength portion to break when an external force exceeding the envisaged is added to the displacement limiting device The displacement limiting device according to any one of the above. The displacement limiting device according to claim 15 , wherein the low-strength portion is provided with a reduced cross-sectional area as compared with other regions. The displacement limiting device according to any one of claims 1 to 16 , wherein the first engaged portion and the second engaged portion are provided so as to have different lengths.

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