JP5727852B2 - Buffer body and bridge buffer structure using the same - Google Patents

Description

  The present invention relates to a shock absorber capable of buffering an impact caused by, for example, a horizontal load acting on a member such as a bridge or a structure, and a shock absorbing structure for a bridge using the shock absorber.

  The bridge is connected and fixed to the abutment with a support part such as a support body, anchor bolt, set bolt, etc., and connecting members such as stoppers and connecting brackets, but if the horizontal load acts on the abutment or the bridge due to an earthquake etc., the abutment also The bridge also vibrates in the horizontal direction. Usually, since the abutment and the bridge have different natural frequencies, a relative horizontal displacement occurs between them. At this time, an impact is generated in a support for fixing the abutment and the bridge, a stopper, a fixture such as a coupling member, and other coupling tools (these are called “bridge-related members”). In some cases, the bridge slides sideways (moves sideways) and slides down from above the support (support) to cause an impact.

  When the impact occurs, the bridge and the connecting member may be damaged. In order to prevent damage, it is necessary to buffer the impact. Conventionally, there are buffer bodies as disclosed in Patent Documents 1 to 3 as a buffer technique. The buffer body of patent document 1 is a rubber elastic body containing fibers. The buffer body of Patent Document 2 is obtained by laminating a belt body obtained by rolling and adhering rubber on both surfaces of a cloth made of natural, synthetic, or metal fibers around a shaft portion of a bolt body as many times as necessary. The shock absorber disclosed in Patent Document 3 is obtained by winding a laminated body obtained by rolling and bonding rubber on one side or both sides of a cloth-like body made of natural, synthetic, or metal fibers around a bolt shaft a predetermined number of times.

Utility Model Registration No. 3163925 JP 09-177746 A Japanese Patent Laid-Open No. 10-196626

  The rubber elastic body of Patent Document 1, the buffer body of Patent Document 2, and the shock absorber body of Patent Document 3 can all be expected to have a buffering effect, but since the fibers are incorporated in the rubber, the impact force is dispersed. Is not necessarily sufficient.

  An object of the present invention is to provide a shock absorber that easily disperses impact force and is not easily damaged by stress concentration at the time of shock, and a bridge shock absorbing structure using the shock absorber as a shock absorber plate, a displacement prevention device, a support body, etc. There is to do.

The shock absorber of the present invention is a shock absorber that is disposed between the abutment and the bridge girder and can cushion the impact caused by the collision between the abutment and the bridge girder. The outer periphery of the material is surrounded by a plate-shaped outer frame, and one or more ring-shaped or spiral buffer plates are arranged in the elastic material, and the buffer plates are arranged along the penetration direction of the through holes, and each layer The shock-absorbing plate is a series in the circumferential direction or the spiral direction, or is divided into two or more, and the through hole has a size that can be fitted to the outer periphery of an anchor bolt, a column, or a stopper protruding from an abutment or a bridge girder. , and the said axis of the through-hole horizontal or in the vertical is arranged between the abutment and the bridge girder, it is attached to the abutment or bridge girder by fitting the through hole on the outer circumference of the anchor bolt or posts or stopper Abutment and bridge Wherein the vertically disposed between the outer frame can be buffered via the elastic material accept the horizontal vibration of the abutment and the bridge girder, when the horizontally disposed between the abutment and the bridge girder, the outer frame is one that may be buffered through the elastic material accepted vibration in the vertical direction of the abutment and the bridge girder. The shock absorber may have an outer frame that is separate from the shock absorber or may be the outermost layer of a spiral shock absorber.

  The shock absorber according to the present invention includes a head having an outer shape larger than that of the shock absorber in an axial direction above the shock absorber, and the head is made of an elastic material and is integrally formed with the elastic material of the shock absorber. The outer peripheral portion may protrude beyond the outer peripheral surface of the buffer body, and the through hole may penetrate from the buffer body to the head. This buffer body can also be provided with a plate-shaped receiving edge on the bottom surface of the head.

  The bridge buffer structure of the present invention is a bridge structure in which an impact caused by a collision between an abutment and a bridge is buffered by the buffer, and the buffer is the buffer according to any one of claims 1 to 4, A stopper is installed on one side of the bridge and a bracket is installed on the other side. The stopper includes a pedestal portion to be attached to the abutment and a trunk portion protruding thereon, and the through-hole of the buffer body is a trunk portion of the buffer body. The bracket is disposed outside the buffer body away from the buffer body, and the bracket comes into contact with the buffer body due to the vibration of the bridge and the abutment, so that the shock at the time of contact is buffered. It is what I did.

  The bridge buffer structure according to the present invention is a bridge structure in which an impact caused by a collision between an abutment and a bridge is buffered by the buffer body. The buffer body is the buffer body according to claim 1 or 2, wherein the buffer bridge girder has a frame shape. A coupling tool is attached, a fitting port is opened in the coupling tool, the buffer body is disposed inside the fitting port, and a through hole of the buffer body is fitted to a post projecting from an abutment, and the bridge When the abutment vibrates, the shock absorber and the support come into contact with each other, so that the shock at the time of contact can be buffered.

  The bridge buffer structure of the present invention is a bridge structure in which an impact caused by a collision between an abutment and a bridge is buffered by the buffer body. The buffer body is the buffer body according to claim 3 or 4, and the anchor bolt protrudes from the abutment. The connecting plate protrudes from the bridge girder of the bridge, the connecting plate has a long hole, the bolt that protrudes from the long hole by inserting the anchor bolt into the long hole and projecting the bolt tip from the long hole The bolt protruding from the head is fitted with a through hole of the buffer at the tip, the lower part of the buffer is placed in the elongated hole, the head is placed on the connecting plate The bridge girder and the abutment are connected by screwing and tightening the nut, and the connecting plate and the buffer come into contact with each other when the bridge and the abutment vibrate so that the shock at the time of contact can be buffered.

The buffer of the present invention has the following effects.
1. Since the buffer plate is a metal plate, the impact force is easily dispersed and the impact is alleviated. Further, the elastic material in the set space inside the outer frame is not easily damaged by stress concentration.
2. The shock absorbers of each layer are cylindrical metal plates, cylindrical metal plates separated into two or more in the circumferential direction, or spiral metal plates, so that the impact force is particularly easy to disperse, and the elastic material is stress concentrated. It becomes hard to break by.
3. When the outer frame and the spiral buffer plate are continuously formed with a single metal plate, the structure is simple and factory production and on-site construction are easy.
4). If a through-hole is opened at the center of the elastic material, it is possible to easily set an anchor bolt, a stopper or the like on the outer periphery.

The bridge buffer structure of the present invention has the following effects.
1. Since the shock absorber is provided on one or both of the bridge or the abutment and the bridge-related member, a bridge drop prevention device, a displacement limiting device, and a step prevention device can be provided.
2. When the shock absorber is installed on site, it can be constructed according to the structure, shape, size, arrangement, etc. of the abutment and bridge on the site, so the site adaptability is good.

(A)-(c) is an example of the buffer body of this invention, Comprising: It is a frame-shaped case where the metal plate of 1 layer was isolate | separated into four sheets, (a) is a perspective view, (b) is a longitudinal cross-section. FIG. 2C is a plan view. It is another example of the buffer body of this invention, Comprising: (a) is a perspective view in case a buffer plate is a cylindrical spiral, (b) is a perspective view in the case where a buffer plate is a rectangular tube spiral. It is another example of the buffer body of this invention, Comprising: (a) is a perspective view in case a buffer plate is a semicylindrical shape, (b) is a perspective view in case a buffer plate is L-shaped. It is an example in case the buffer body of this invention is provided with the cylindrical axial part and the disk shaped head, (a) is a perspective view, (b) is a longitudinal cross-sectional view, (c) is a top view. It is an example in case the buffer body of this invention is provided with the square-tube-shaped axial part and the square-shaped head, Comprising: (a) is a perspective view, (b) is a top view. The longitudinal cross-sectional view of the bridge buffer structure which set the buffer body of this invention to the outer periphery of the stopper. It is the example which set the buffer body of this invention to the outer periphery of a prism, (a) is explanatory drawing before an assembly, (b) is a longitudinal cross-sectional view after an assembly. It is an example of the bridge buffer structure which set the buffer body of this invention to the outer periphery of an anchor bolt, (a) is a perspective view, (b) is a longitudinal cross-sectional view. It is an example of the bridge cushion structure which provided the buffer body of this invention in the abutment, (a) is a partial cross section front view, (b) is a partial cross section front view of another form. It is an example of the bridge cushion structure which provided the buffer body of this invention in the abutment, and was used as the level | step difference prevention apparatus, (a) is a partial cross-section front view at the time of normal, (b) is a support including a buffer body as a bridge slips The partial cross section front view at the time of being supported with material.

(Embodiment 1 of buffer body: frame shape)
As an example of the buffer body 1 of the present invention, what is shown in FIGS. 1 (a) to 1 (c) is a frame shape, and is opened vertically in the rectangular outer frame 2 and the center of the outer frame 2. The through-hole 3 and the buffer plate 4 are provided. The buffer plate 4 is disposed between the outer frame 2 and the through hole 3, between the outer frame 2 and the inner buffer plate 4, between the adjacent buffer plates 4, and between the innermost buffer plate 4 and the through hole 3. The space 5 (filling space) is filled with the elastic material 5.

  A metal plate such as steel or stainless steel is suitable for the outer frame 2. Although the outer frame 2 in FIGS. 1A to 1C is a rectangular cylinder, the shape may be a cylinder such as a triangle, a cylinder, or an ellipse, or another shape.

  The buffer plate 4 is arranged in two layers between the outer frame 2 and the through-hole 3 as shown in FIGS. 1B and 1C, and the buffer plate 4 of each layer is an outer frame in which four metal plates are rectangular. 2 are arranged apart from the inside of the four sides. The number of layers of the buffer plate 4 can be a desired number greater than one. A metal plate such as steel or stainless steel is suitable for the buffer plate 4, but a hard resin plate or FRP plate may be used as long as it is plate-shaped. The interval between the outer frame 2 and the buffer plate 4, the interval between the adjacent buffer plates 4, and the interval between the innermost buffer plate 4 and the through hole 3 can be appropriately selected.

  As the elastic material 5, a material having excellent elasticity and excellent compressive strength such as butyl rubber and urethane resin is suitable, but other materials can be used as long as they have necessary elasticity and compressive strength. The elastic material 5 may be a one-component type, a two-component type, or any other type.

(Embodiment 2 of buffer body: spiral shape)
As another example of the buffer body 1 of the present invention, the one shown in FIGS. 2 (a) and 2 (b) has a spiral shape, the one shown in FIG. 2 (a) has a single metal plate in a cylindrical spiral shape, The outermost layer is the outer frame 2, the inner layer is the buffer plate 4, the through hole 3 is provided at the center, and the filling material inside the outer frame 2 is filled with the elastic material 5.

  In FIG. 2B, a single metal plate is formed in a rectangular cylindrical spiral, the outermost layer is the outer frame 2, the inner layer is the buffer plate 4, the through hole 3 is provided at the center, and the outer frame 2 is filled with an elastic material 5.

(Embodiment 3 of buffer body: frame shape)
As another example of the buffer body 1 of the present invention, those shown in FIGS. 3A and 3B are frame-shaped, and the buffer body 1 shown in FIG. 3A is buffered inside a cylindrical outer frame 2. Plates 4 are arranged in two layers. The buffer plates 4 of each layer are arranged in a ring shape by separating two semi-cylindrical metal plates in the circumferential direction, and the elastic material 5 is filled in the filling space inside the outer frame 2 and solidified. The buffer body 1 shown in FIG. 3 (b) has two metal plates, each of which has a L-shaped buffer plate 4 on the inner side of a rectangular outer frame 2, arranged in a square shape with the corner portions thereof separated. The elastic material 5 is filled in the filling space inside the outer frame 2 and solidified. 3 (a) and 3 (b) is the same material as the elastic material 5 in FIG. 1, and other configurations are the same as those of the shock absorber 1 in FIGS. 1 (a) to 1 (c).

(Embodiment 4 of buffer body: cylindrical)
4 (a) to 4 (c) as other examples of the buffer body 1 of the present invention include a disk-shaped head portion 7 having a larger outer shape than the shaft portion 6 on the cylindrical shaft portion 6, The shaft portion 6 is provided with two layers of ring-shaped buffer plates 4 on the inner side of the cylindrical outer frame 2, an elastic material 5 is filled in the inner filling space of the outer frame 2, and the head portion 7 is buffered inside. The plate is not disposed and is formed only of the elastic material 5. The outer frame 2 has a plate-shaped receiving edge 8 at the upper part, and the head 7 is supported by the receiving edge 8.

(Embodiment 5 of buffer body: rectangular tube shape)
As another example of the buffer body 1 of the present invention, the one shown in FIGS. 5A and 5B includes a rectangular head portion 7 having a larger outer shape than the shaft portion 6 on the rectangular tube-shaped shaft portion 6. The shaft portion 6 has a rectangular frame-shaped buffer plate 4 provided in two layers inside a rectangular tube-shaped outer frame 2, and an elastic material 5 is filled in a filling space inside the outer frame 2. The head 7 is formed of only the elastic material 5 without a buffer plate disposed therein. The outer frame 2 has a square plate-shaped receiving edge 8 at the upper portion thereof, and the head 7 is supported by the receiving edge 8.

(Other embodiment of buffer body)
The buffer body 1 shown in FIG. 1A to FIG. 5A can be provided with an inner frame on the outer peripheral surface of the through hole 3 if necessary. The inner frame can be a metal plate, but it can also be a plate made of another material or another structure such as a net. The buffer plate 4 shown in FIGS. 1 (a) to 5 (a) is made shorter than the height of the outer frame 2 so that the entire buffer plate 4 is covered with the elastic material 5. Can be made the same as the height of the outer frame 2 so that the upper and lower ends of the buffer plate 4 are not covered with the elastic material 5. 4 (a) and 5 (a) can be extended into the head 7 if necessary.

(Embodiment 1 of the bridge buffer structure)
Although the shock absorber 1 of the present invention can be used in various fields, the example shown in FIG. 6 is an example in which the shock absorber 1 shown in FIG. 1 is used as a bridge displacement limiting device. In FIG. 6, 10 is an abutment constructed on each of the left bank and the right bank of the river, 11 is a fixed plate installed on the abutment 10, and 12 is an E-shaped stopper that is installed and fixed on the fixed plate 11. , 13 is a bridge girder (for example, H-shaped steel), 14 is a bracket protruding below the bridge girder 13, and 1 is a shock absorber of the present invention. The buffer body 1 is fitted on the outer periphery of the body 12 a of the stopper 12. The bracket 14 has a U-shape in plan view, and is fixed to the bridge girder 13 so as to sandwich the shock absorber 1 from the left and right. The bracket 14 and the shock absorber 1 can be fixed or separated.

  In the bridge buffer structure of FIG. 6, when a horizontal load is applied to the bridge due to an earthquake or the like, the abutment 10 vibrates in the horizontal direction (the bridge axis direction in FIG. 6), and the bridge girder 13 also vibrates in the horizontal direction. Usually, since the natural frequencies of the abutment 10 and the bridge girder 13 are different, a relative horizontal displacement occurs between the abutment 10 and the bridge girder 13. When an impact occurs in the buffer body 1 due to this displacement, the impact is dispersed and buffered by the buffer plate 4 of the buffer body 1 to prevent the elastic member 5 from being damaged due to stress concentration, and applied to the stopper (bridge-related member) 12. The shock is buffered and the displacement of the bridge girder 13 is limited.

(Embodiment 2 of bridge buffer structure)
FIGS. 7A and 7B show an example in which the shock absorber 1 shown in FIG. 1 is used in a prismatic displacement limiting device. 7A and 7B, the shock absorber 1 is fixed on the outer periphery of the support 15, and the shock absorber 1 together with the support 15 is a through-hole of a metal rectangular frame-shaped connector (bridge-related member) 16. 17 is fitted and fixed. The connector 16 is fixed by being sandwiched between two metal plates 18 fixed to the bridge girder 13. The connector 16 and the buffer body 1 can also be kept apart.

  7 (a) and 7 (b), if the bridge girder 13 vibrates in the arrow direction (horizontal direction) in FIG. 7 (b) due to an earthquake or the like, an impact is generated on the shock absorber 1 in the connector 16. The shock is distributed and buffered by the buffer plate 4 of the buffer body 1 to prevent the elastic member 5 from being damaged due to the stress concentration, and the shock applied to the connector (bridge-related member) 16 is buffered and the bridge girder 13 is displaced. Is limited.

(Embodiment 3 of bridge buffer structure)
FIGS. 8A and 8B are examples in which the shock absorber 1 shown in FIGS. 4A to 4C is used in an anchor bolt type displacement limiting device. 8 (a) and 8 (b), the shock absorber 1 shown in FIGS. 4 (a) to 4 (c) is placed on the outer periphery of an anchor bolt (bridge-related member) 20 erected on the pedestal 19 of the abutment 10. The shaft portion 6 of the shock absorber 1 is inserted into the long hole 22 opened in the connecting plate 21, and the head 7 of the shock absorber 1 is placed on the connecting plate (bridge-related member) 21 as shown in FIG. The buffer body 1 is fixed to the outer periphery of the anchor bolt 20 by tightening the nut 23 screwed into the anchor bolt 20 in this state. The long hole 22 is long in the axial direction of the bridge girder 13. 8A and 8B, the buffer body 1 shown in FIGS. 5A and 5B can be used as the buffer body 1. FIG.

  8 (a) and 8 (b), when the bridge girder 13 vibrates in the arrow direction (horizontal direction) of FIG. 8 (a) due to an earthquake or the like, an impact is generated. 4, the elastic material 5 is prevented from being damaged by stress concentration, the impact applied to the connecting plate 21 is buffered, and the displacement of the bridge girder 13 is limited. In addition, when the position of the bridge girder 13 is lowered due to an earthquake or the like, the shock absorber 1 is lowered together with the bridge girder 13 and the bottom surface of the shock absorber 1 is contacted and supported by the pedestal 19 of the abutment 10. Buffered.

(Embodiment 4 of bridge buffer structure)
Fig.9 (a) is the example which used the buffer 1 shown to Fig.1 (a)-(c) for another displacement limiting apparatus. In FIG. 9A, the through hole 3 of the shock absorber 1 of FIGS.
In FIG. 9A, when the bridge girder 13 is vibrated in the horizontal direction due to an earthquake or the like and an impact is generated, the impact is dispersed and buffered by the buffer plate 4 of the buffer body 1 to prevent the elastic material 5 from being damaged due to stress concentration. Thus, the impact applied to the pedestal (bridge-related member) 19 is alleviated and the displacement of the bridge girder 13 is limited. The shock absorber 1 can also be attached to the side surface of a brat (bridge-related member) 24 attached to the bridge girder 13.

(Embodiment 5 of the bridge buffer structure)
FIG. 9B shows a displacement limiting device in which both the side surface of the abutment 10 and the side surface of the brat (bridge-related member) 24 attached to the bridge girder 13 are filled with the through holes 3 of the buffer body 1 with an elastic body. It is an example. The two shock absorbers 1 are opposed to each other but can be kept in contact with each other. In FIG. 9B, even if an impact occurs due to an earthquake or the like, the impact is dispersed and buffered by the buffer plate 4 of the buffer body 1 to prevent the elastic material 5 from being damaged due to stress concentration. The impact applied to the member 19 is relieved and the displacement of the bridge girder 13 is limited.

(Usage example of shock absorber for step prevention device)
FIGS. 10A and 10B are examples in which the shock absorber 1 shown in FIGS. 9A and 9B is used in the step prevention device. 10A, the support body 25 is arranged and fixed on the abutment 10, and the bridge girder 13 is arranged and fixed on the support body 25. The buffer body 1 is arranged and fixed sideways, and a space is provided between the upper surface of the buffer body 1 and the bottom surface of the bridge girder 13.

  10A, when the bridge girder 13 vibrates in the horizontal direction due to an earthquake or the like and the support body 25 falls down as shown in FIG. 10B, the bridge girder 13 slides down from the support body 25 and the buffer body. 1 is supported (supported). Also in this case, the impact generated at the time of sliding is dispersed and buffered by the buffer plate 4 of the buffer body 1, the damage of the elastic material 5 due to stress concentration is prevented, the impact applied to the bridge girder 13 is buffered, and the abutment of the bridge girder 13 is also buffered. Falling to 10 is prevented, the road surface level is reduced, and the vehicle can pass.

(Embodiment when constructing shock absorber on site)
The above-described bridge buffer structure is a case where the buffer body 1 manufactured at the factory is used on site, but in the present invention, the buffer body 1 can also be constructed on site. An example of on-site construction will be described below.

  For example, when constructing the buffer body 5 in FIG. 6 on the site, the outer frame 2 and the buffer plate 4 are arranged on the outer periphery of the stopper 12, and between the outer frame 2 and the buffer plate 4, between the adjacent buffer plates 4, The elastic material 5 is filled in each filling space between the buffer plate 4 and the stopper 12.

  When the buffer body 1 is constructed on the outer periphery of the support column 15 as shown in FIGS. 7A and 7B, the outer frame 2 and the buffer plate 4 are arranged on the outer periphery of the support column 15. The elastic material 5 is filled in the filling spaces between the buffer plates 4 and the stoppers 12 between the adjacent buffer plates 4.

  When the buffer body 1 is constructed on the outer periphery of the anchor bolt 20 as shown in FIGS. 8A and 8B, the outer frame 2 and the buffer plate 4 are arranged on the outer periphery of the anchor bolt 20, and the outer frame 2 and the buffer are placed. The elastic material 5 is filled in the filling spaces between the plates 4, between the adjacent buffer plates 4, and between the buffer plates 4 and the anchor bolts 20.

  In any of the above-mentioned field constructions, the outer frame 2 and the buffer plate 4 are made of metal plates similarly to those shown in FIGS. 1A to 5A, and the buffer plate 4 is shown in FIGS. It can be arranged in two or more layers as in 5 (a). The shape, arrangement, and the like of the buffer plate 4 can be the same as in the case of FIGS. 1 (a) to 5 (a).

  The buffer body of the present invention is not only a bridge but also a structure such as a building, and can be used for buffering these components and for supporting a step.

DESCRIPTION OF SYMBOLS 1 Buffer body 2 Outer frame 3 Through-hole 4 Buffer board 5 Elastic material 6 Buffer body shaft part 7 Buffer body head 8 Receiving edge 10 Abutment 11 Fixing plate 12 Stopper 12a Stopper body 13 Bridge bridge girder 14 Bracket 15 Post Reference Signs List 16 connector 17 through hole 18 metal plate 19 pedestal 20 anchor bolt 21 connecting plate 22 long hole 23 nut 24 brat 25 support

Claims (7)

It is a shock absorber that can be placed between the abutment and the bridge girder to cushion the impact caused by the collision between the abutment and the bridge girder.
Provided with a through hole in the center of the block-shaped elastic material, the outer periphery of the elastic material is surrounded by a plate-shaped outer frame, and one or more ring-shaped or spiral buffer plates are arranged in the elastic material, The buffer plate is arranged along the through direction of the through hole, and the buffer plate of each layer is a series or divided into two or more in the circumferential direction or the spiral direction, and the through hole is an anchor bolt protruding from the abutment or the bridge girder Or a size that can be fitted to the outer periphery of the column or stopper,
Wherein the axis of the through hole horizontal or in the vertical is arranged between the abutment and the bridge girder, it can be attached to the through hole in the abutment or bridge girder by fitting the outer circumference of the anchor bolt or struts or stopper, When the vertically disposed between the abutment and the bridge girder, the outer frame can be buffered via the elastic material accept the horizontal vibration of the abutment and the bridge girder, when the horizontally disposed between the abutment and the bridge girder can the outer frame is buffered through an elastic material accepted vibration in the vertical direction of the abutment and the bridge girder,
A shock absorber characterized by that. The shock absorber according to claim 1, wherein
The outer frame is a separate body from the buffer or the outermost layer of the spiral buffer;
A shock absorber characterized by that. The shock absorber according to claim 1 or 2,
A head having a larger outer shape than the shock absorber is provided above the shock absorber in the axial direction,
The head is made of an elastic material and is integrally molded with the elastic material of the shock absorber, and the outer peripheral portion protrudes outside the outer peripheral surface of the shock absorber,
A through hole penetrates from the buffer to the head,
A shock absorber characterized by that. The shock absorber according to claim 3,
With a plate-like receiving edge on the bottom of the head,
A shock absorber characterized by that. In the bridge structure that cushions the impact caused by the collision between the abutment and the bridge with a buffer,
The buffer is the buffer according to any one of claims 1 to 4,
A stopper is installed on one of the abutment and the bridge, and a bracket is installed on the other.
The stopper has a pedestal part to be attached to the abutment and a trunk part protruding above it.
A through-hole of the buffer body is fitted to the outer periphery of the body of the buffer body,
The bracket is disposed outside the buffer body away from the buffer body;
The bracket is in contact with the buffer body due to the vibration of the bridge and the abutment so that the shock at the time of contact is buffered.
Bridge cushioning structure characterized by that. In the bridge structure that cushions the impact caused by the collision between the abutment and the bridge with a buffer,
The buffer is the buffer according to claim 1 or claim 2,
A frame-shaped connector is attached to the bridge girder of the bridge, and a fitting port is opened in the connector.
The buffer body is disposed inside the fitting port, and the through hole of the buffer body is fitted to a column protruding from the abutment,
The shock absorber and the support come into contact with each other when the bridge and the abutment vibrate so that the shock at the time of contact is buffered.
Bridge cushioning structure characterized by that. In the bridge structure that cushions the impact caused by the collision between the abutment and the bridge with a buffer,
The buffer is the buffer according to claim 3 or claim 4,
Anchor bolts protrude from the abutment,
A connecting plate protrudes from the bridge girder of the bridge, and the connecting plate has a long hole opened.
Insert the anchor bolt into the elongated hole and project the bolt tip from the elongated hole;
Fit the through hole of the buffer body to the bolt tip protruding from the long hole, place the lower part than the head of the buffer body in the long hole, and install the head on the connecting plate,
The bridge girder and the abutment are connected by screwing and tightening a nut to the bolt protruding from the head,
When the bridge and the abutment vibrate, the connecting plate and the buffer come into contact with each other so that the shock at the time of contact is buffered.
Bridge cushioning structure characterized by that.

Images