JP2019199734A - Cutoff device for road bridge elongation/contraction device - Google Patents

Abstract

To provide a cutoff device for a road bridge elongation/contraction device which is advantageous in terms of the shortening of a construction period and cost reduction.SOLUTION: A cutoff device 34 for a road bridge elongation/contraction device comprises a rubber sheet structure 36 having a width extending in a bridge axial direction of a road bridge 12 and a length extending in a direction orthogonal to the bridge axial direction. The rubber sheet structure 36 comprises: both-side side plate parts 38 which can come into contact with end faces 14A of opposing end parts 14; a lower plate part 40 for connecting lower ends of the both-side side plate parts 38; an elastic contact part 44 for bringing the both-side side plate parts 38 into elastic contact with the end faces 14A of the opposing end parts 14; and lock members 42 lockable to bottom faces 22A of recesses 22 of the end parts 14 of a floor plate 16 in a state that the both-side side plate parts 38 protruding to the outside of a width direction from the both-side side plate parts 38 are in elastic contact with the end faces 14A of the opposing end parts 14.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a water stop device for a road bridge expansion and contraction device.

A road bridge includes, for example, an abutment disposed at both ends in the bridge axis direction and one or more floor slabs arranged in the bridge axis direction between the abutments as elements constituting the road bridge. Yes.
The joint between the abutment and the floor slab and the joint between the floor slabs are configured to include a road bridge expansion and contraction device.
In general, a road bridge expansion / contraction device is attached to the opposite ends of the elements constituting the road bridge, that is, the end of the abutment and the end of the floor slab, or the end of the floor slab opposite to each other. A pair of worn joint members are included.
At the ends of the pair of joint members, a concavo-convex gap is formed extending in a direction orthogonal to the bridge axis direction, and this concavo-convex gap increases or decreases according to the expansion and contraction of the floor slab in the bridge axis direction. Absorbs the expansion and contraction.
The water stop device for a road bridge expansion and contraction device is disposed below such a pair of joint members, is elastically deformable in a direction orthogonal to the bridge axis direction, and rainwater that has entered from the uneven gaps of the pair of joint members This is to prevent the downward flow of the road bridge.

The water stop device for a road bridge expansion / contraction device is configured to include a rubber sheet structure, and the rubber sheet structure includes side plate portions on both sides disposed at opposite ends of elements constituting the road bridge, and side plates on both sides. The side plate portions on both sides of the rubber sheet structure are attached as follows.
In other words, the opposite ends of the elements constituting the road bridge are provided with post-concrete concrete filling recesses for attaching joint members, and a plurality of reinforcing bars protrude from the bottom surface of the recesses. Yes.
First, the mounting hardware for attaching the side plate portions on both sides of the rubber sheet structure to the mutually opposing ends of the elements constituting the road bridge through the plurality of reinforcing bars is assembled.
Then, welding is performed on the plurality of reinforcing bars, and mounting hardware is attached to the bottom surface of the concave portion for filling concrete, and the side plate portions on both sides of the rubber sheet structure are attached to the mounting hardware in a direction perpendicular to the bridge axis direction. It is designed to be installed using bolts at multiple locations.

JP2018-3315

Therefore, for installation of the water stop device for road bridge expansion and contraction device, assembly work of mounting hardware, welding work of mounting hardware to reinforcing bars, side plate parts on both sides of rubber sheet structure are attached to mounting hardware using bolts at multiple locations. Installation work was required, and it took time to install a water stop device for a road bridge expansion / contraction device, and some improvement was required.
The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a water stop device for a road bridge expansion and contraction device in a short period of time, and a construction period for the installation of the water stop device for a road bridge expansion and contraction device. It is to provide a water stop device for a road bridge expansion / contraction device that is advantageous in reducing the cost and reducing costs.

In order to achieve the above-mentioned object, the present invention is provided with an open concave portion at the end facing each other of the elements constituting the road bridge and open toward the opposite end, respectively. A gap formed between the end faces of the road bridge and the end faces of the road bridge that extend together in the direction orthogonal to the bridge axis direction of the road bridge, together with the mutually opposite ends of the elements constituting the road bridge A road bridge expansion / contraction device that absorbs expansion and contraction of the road bridge is attached via post-cast concrete filled in the concave portion, and is located below the road bridge expansion / contraction device between mutually facing ends of the elements constituting the road bridge. A waterstop device for a road bridge expansion and contraction device provided, wherein the waterstop device for a road bridge expansion and contraction device extends in a direction perpendicular to the bridge axis direction and a width extending in the bridge axis direction of the road bridge. Rubber sheet structure having a length The rubber sheet structure is provided at both ends in the width direction and can be brought into contact with the end faces of the opposite ends, respectively, and the road bridge telescopic device in a direction perpendicular to the bridge axis direction. A lower plate portion extending over the entire length in the length direction and extending in the width direction to connect the lower ends of the side plate portions on both sides, and the side plate portions on both sides are elastically applied to the end surfaces of the opposite ends. It can be locked to the bottom surface of the concave portion with the elastic contact portion to be in contact and the side plate portions on both sides projecting outward in the width direction, and the side plate portions on both sides are in elastic contact with the end surfaces of the opposite ends. And a locking member.
Further, according to the present invention, an end portion facing each other of the elements constituting the road bridge is provided with an open recess toward the opposite end portion, and an open recess is provided above the end portion to constitute the road bridge. A joint portion of the road bridge is formed together with the opposite end portions of the element, and the expansion and contraction between the ends formed in the direction perpendicular to the bridge axis direction of the road bridge is absorbed between the end faces of the opposite end portions. A road bridge expansion / contraction device is attached via post-cast concrete filled in the recess, and is provided below the road bridge expansion / contraction device between mutually facing ends of the elements constituting the road bridge. A water stop device for a device, wherein the water stop device for a road bridge expansion and contraction device has a width extending in a bridge axis direction of the road bridge and a length extending in a direction perpendicular to the bridge axis direction. A rubber sheet having a sheet structure; The lateral structure is provided at both ends in the width direction and can be brought into contact with the end surfaces of the opposing ends, and the length direction of the road bridge telescopic device in a direction perpendicular to the bridge axis direction. And a reaction force plate portion that extends in the width direction and connects the side plate portions on both sides, and the reaction force plate portion has no external force applied to the rubber sheet structure. In the state, the two side plates are bent and deformed from the third shape in a state where the side plate portions on both sides are in contact with the end surfaces of the opposite end portions, and the both sides are returned to the third shape by an elastic force. The side plate portions are elastically brought into contact with the end surfaces of the end portions facing each other.
In the present invention, the rubber sheet structure is extended in the width direction above the lower plate portion and connected to the side plate portions on both sides, and no external force is applied to the rubber sheet structure. The side plates on both sides are elastically deformed from the first shape and return to the first shape with the first shape being in contact with the end surfaces of the opposite end portions. A reaction force plate portion is provided integrally for elastically contacting the portion with the end surfaces of the opposite ends, and the elastic contact portion is constituted by the reaction force plate portion.
Further, the present invention is characterized in that the reaction force plate portion is provided over the entire length in the length direction of the rubber sheet structure.
Further, the present invention is characterized in that a plurality of the reaction force plate portions are provided at intervals in the length direction of the rubber sheet structure.
Further, according to the present invention, a spring steel plate extending in a width direction that is a bridge axis direction of the reaction force plate portion is embedded in the reaction force plate portion, and the spring steel plate applies an external force to the rubber sheet structure. The second shape extending along the first shape in a state of not being bent, and the side plate portions on both sides are curved and deformed from the second shape in a state where the side plate portions are in contact with the end surfaces of the opposite ends. The side plate portions on both sides are elastically brought into contact with the end surfaces of the end portions facing each other in cooperation with the reaction force plate portion by an elastic force for returning to the second shape.
In the present invention, the side plate portions on both sides are embedded with support plates that are rigid and support the locking members, and the side plate portions on both sides are provided at the ends of the elements of the road bridge that face each other. The support plate is parallel to the end surface of the end portion while being elastically contacted with the end surface.
In the present invention, the locking member protrudes from the upper part of the support plate, and the lower part of the support plate is located at a position of the side plate part to which the reaction force plate part is connected. And
Further, according to the present invention, when the side plate portions on both sides are displaced in a direction approaching each other, the reaction force plate portion is proactively deformed relative to other portions, and a deformation promoting portion that determines the bending deformation direction is defined. It is provided.
Further, the present invention is characterized in that an inclined surface gradually separating from the end surface as it goes upward is formed on the outer surface of the side plate portions on both sides pressed against the end surface of the end portion.

According to the present invention, the locking member is locked to the bottom surface of the recess, and the elastic contact portion elastically contacts the side plate portions on both sides to the mutually opposing end portions of the elements constituting the road bridge. The rubber sheet structure is easily assembled between the mutually facing ends of the elements to be installed, and the rubber structure is installed together with the road bridge expansion and contraction device by post-cast concrete filled in the recess.
Therefore, as in the past, the assembly work of the mounting hardware, the welding work of the mounting hardware to the rebar, the mounting work of attaching the side plate portions on both sides of the rubber sheet structure to the mounting hardware using bolts at multiple locations can be omitted, This is advantageous for easily and surely installing a water stop device for a road bridge expansion and contraction device.
In addition, according to the present invention that includes both side plate portions and reaction plate portions, and does not have a lower plate portion, the structure of the rubber sheet structure can be simplified and reduced in weight while being used for a road bridge expansion and contraction device. This is advantageous for easily and reliably installing the water stop device.
Moreover, according to the present invention having the reaction force plate portion, it is advantageous in reducing the number of parts of the water stop device and simplifying the installation work.
Further, the reaction force plate portion may be provided over the entire length in the length direction of the rubber sheet structure, or a plurality of reaction force plate portions may be provided at intervals in the length direction of the rubber sheet structure. This is appropriately determined according to the required elastic contact force. That is, the required elastic contact force can be obtained depending on the length of the reaction force plate portion.
Further, according to the present invention in which the spring steel plate is provided inside the reaction force plate portion, when the side plate portions on both sides are elastically contacted with the mutually opposing ends of the elements constituting the road bridge, a large elastic contact force is obtained. It will be advantageous.
Further, according to the present invention in which the support plates for supporting the locking members are embedded in the side plate portions on both sides, the adhesion of the side plate portions on both sides to the opposite ends of the elements constituting the road bridge is improved, and rainwater This is advantageous in preventing the lowering of the liquid from falling downward.
In this case, when the lower portion of the support plate is positioned at the side plate portion to which the reaction force plate portion is connected, the adhesion of the side plate portions on both sides with respect to the opposite end portions is improved, and the rain water is prevented from falling downward. More advantageous on the above.
In addition, according to the present invention including the deformation promoting portion, the direction in which the reaction force plate portion bends and deforms can be determined, which is advantageous in simplifying the installation of the rubber sheet structure. This is advantageous for easily and reliably enhancing the appearance of the water device.
Further, according to the present invention having an inclined surface, even if there are irregularities on the end surfaces of the mutually opposing end portions of the elements constituting the road bridge, it is more advantageous in preventing the rain water from falling downward. It becomes.

It is sectional drawing of the state in which the rubber sheet structure of 1st Embodiment was installed between the edge parts which mutually oppose the element which comprises a road bridge. It is sectional drawing of the rubber sheet structure of 1st Embodiment in the state where external force is not applied. It is a perspective view of the intermediate part of the length direction of the rubber sheet structure of a 1st embodiment. It is a perspective view of the edge part of the length direction of the rubber sheet structure of 1st Embodiment. It is a perspective view of the intermediate part of the length direction of the rubber sheet structure of 2nd Embodiment. (A) is sectional drawing of the rubber sheet structure of 3rd Embodiment in the state where external force is not applied, (B) is a perspective view of the intermediate part of the length direction of the rubber sheet structure of 3rd Embodiment. FIG. It is sectional drawing of the state in which the rubber sheet structure of 3rd Embodiment was installed between the edge parts which mutually oppose the element which comprises a road bridge. (A) is sectional drawing of the rubber sheet structure of 4th Embodiment in the state where external force is not applied, (B) is a rubber sheet structure of 4th Embodiment of the element which comprises a road bridge. It is sectional drawing of the state installed between the edge parts which mutually oppose. (A) is sectional drawing of the rubber sheet structure of the latching member location of 5th Embodiment in the state in which the external force is not applied, (B) is the relationship of 5th Embodiment in the state in which the external force is not applied. Sectional drawing of the rubber sheet structure of the location where there is no stop member, (C) is a state in which the rubber sheet structure of the fifth embodiment is installed between the opposite ends of the elements constituting the road bridge It is an expanded sectional view of the principal part. (A)-(D) are sectional drawings of the rubber sheet structure of 6th Embodiment in the state where external force is not applied. (A)-(C) are sectional drawings of the rubber sheet structure of 6th Embodiment in the state where external force is not applied. (A) is sectional drawing of the rubber sheet structure of 7th Embodiment in the state where external force is not applied, (B) is the rubber sheet structure of 7th Embodiment of the element which comprises a road bridge. It is sectional drawing of the state installed between the edge parts which mutually oppose. It is a perspective view of the edge part of the length direction of the rubber sheet structure of 7th Embodiment.

Next, the present embodiment will be described with reference to the drawings.
(First embodiment)
As shown in FIG. 1, the road bridge expansion and contraction device 10 includes end portions 14 of elements constituting the road bridge 12 that face each other, that is, end portions 14 of the abutment and floor slab 16 that face each other in the bridge axis direction. 14 or a pair of joint members 18 respectively attached to the end portions 14 of the floor slab 16 facing each other.
FIG. 1 shows a case where the road bridge expansion / contraction device 10 is provided between the end portions 14 of the floor slab 16 facing each other. In FIG. 1, reference numeral 20 denotes a bridge pavement formed on the upper surface of the floor slab 16. Show.
The end portions 14 of the floor slabs 16 facing each other are provided with post-concrete concrete filling concave portions 22 for attaching the joint members 18, and the concave portions 22 are open toward the opposite end portions 14. And it is formed in an open shape upward.
A plurality of reinforcing bars 24 protrude from the bottom surface 22 </ b> A of the recess 22.

The pair of joint members 18 are made of steel and have a length that extends in a direction orthogonal to the bridge axis direction.
The pair of joint members 18 includes a side plate portion 26 that is placed on the bottom surface 22 </ b> A of the recess 22, and an upper plate portion 28 that protrudes from the upper end of the side plate portion 26.
The plurality of anchor members 30 projecting from the back surface of the side plate portion 26 are embedded in the post-cast concrete 32 in a state of being coupled to the plurality of reinforcing bars 24 projecting from the bottom surface 22 </ b> A of the recess 22.
The mutually opposing surface of the side plate part 26 of a pair of joint member 18 is arrange | positioned on the same surface as the end surface 14A of the edge part 14 of the floor slab 16 which mutually opposes.
When viewed from above at a location where the upper plate portions 28 of the pair of joint members 18 face each other, an uneven gap S is formed extending in a direction orthogonal to the bridge axis direction. The floor slab 16 is increased or decreased according to the expansion and contraction in the bridge axis direction, and the expansion and contraction of the floor slab 16 is absorbed.
In the present embodiment, the case where the lower ends of the side plate portions 26 of the pair of joint members 18 are placed on the bottom surface 22A of the recess 22 is described. However, the lower end of the side plate portion 26 is the bottom surface 22A of the recess 22. Various conventionally known structures can be adopted as the shape and arrangement structure of the pair of joint members 18 when they are arranged at locations apart upward.

The water stop device 34 for the road bridge expansion and contraction device is disposed below the pair of joint members 18, and prevents the rainwater that has entered from the uneven gap S between the pair of joint members 18 from flowing down the road bridge 12. It is.
The water stop device 34 for the road bridge expansion and contraction device is configured to include a rubber sheet structure 36 that closes a gap between the end surfaces 14A of the end portions 14 facing each other of the elements constituting the road bridge 12.
The rubber sheet structure 36 has a width extending in the bridge axis direction of the road bridge 12 and a length extending in a direction orthogonal to the bridge axis direction.
As shown in FIG. 2, the rubber sheet structure 36 includes side plate portions 38 on both sides, a lower plate portion 40, a locking member 42, and an elastic contact portion 44.
The side plate portions 38 on both sides are provided at both ends in the width direction of the rubber sheet structure 36, and are formed in a plate shape that can come into contact with the end surfaces 14A of the end portions 14 of the elements constituting the road bridge 12 facing each other. . That is, the side plate portions 38 on both sides are formed on the end surface 14A of the end portion 14 of the floor slab 16 facing each other in the bridge axis direction or from the end surface 14A of the end portion 14 of the floor slab 16 facing each other. Over the surface of the side plate portion 26, on the surface of the side plate portion 26 of the pair of joint members 18, or on the surface of the post-cast concrete 32 formed on the same surface as the end surface 14 </ b> A of the end portion 14 of the floor slab 16. It is formed in a plate shape that can be contacted.
In the present embodiment, the side plate portions 38 on both sides are provided so as to be able to contact from the end surface 14A of the end portion 14 of the floor slab 16 facing each other to the surfaces of the side plate portions 26 of the pair of joint members 18.

In the present embodiment, the side plate portions 38 on both sides extend over the entire length in the length direction of the road bridge expansion / contraction device 10 in the direction orthogonal to the bridge axis direction, but in the length direction of the road bridge expansion / contraction device 10. A plurality may be provided at intervals.
The lower plate portion 40 is a portion that receives rainwater that falls downward from the uneven gap S of the pair of joint members 18 and extends over the entire length in the length direction of the road bridge expansion and contraction device 10 in a direction orthogonal to the bridge axis direction. Exist.
The lower plate portion 40 connects the lower ends of the side plate portions 38 on both sides, the center portion in the width direction of the lower plate portion 40 is formed flat, and both side portions in the width direction of the lower plate portion 40 are formed in a curved shape, Except for both ends in the width direction of the lower plate portion 40, the lower plate portion 40 is formed with a uniform thickness.

The elastic contact portions 44 are locations where the side plate portions 38 on both sides are elastically contacted with the end surfaces 14A of the end portions 14 facing each other that constitute the road bridge 12.
In the present embodiment, the elastic contact portion 44 is formed integrally with the rubber sheet structure 36 and extends in the width direction of the rubber sheet structure 36 above the lower plate portion 40 to connect the side plate portions 38 on both sides. It is comprised by the reaction force board part 46 to do.
As shown in FIG. 2, the reaction force plate 46 is in a state in which the side plate portions 38 on both sides are not in contact with the end surfaces 14 </ b> A of the opposite end portions 14 of the elements constituting the road bridge 12, that is, the rubber sheet structure. The first shape is obtained when no external force is applied to 36. In the present embodiment, the first shape is a shape extending on the plane between the side plate portions 38 on both sides, in other words, a flat plate shape.
Then, in a state where the side plate portions 38 on both sides are in contact with the end surfaces 14A of the end portions 14 facing each other, the reaction force plate portion 46 is curved and deformed downwardly from the first shape as shown in FIG. The side plate portions 38 on both sides are elastically brought into contact with the end surfaces 14 </ b> A of the end portions 14 of the elements constituting the road bridge 12 by the elastic force of the reaction force plate portion 46 trying to return to the first shape.
The location where both ends in the width direction of the reaction force plate portion 46 are connected to the side plate portions 38 on both sides may be the upper end of the side plate portion 38 or the lower end of the side plate portion 38. In the present embodiment, the reaction force Both ends in the width direction of the plate portion 46 are connected to intermediate portions in the vertical direction (height direction) of the side plate portions 38 on both sides, and the elastic force of the reaction force plate portion 46 trying to return to the first shape is applied to the side plates on both sides. It is designed so that it can be efficiently transmitted to the portion 38.

In addition, if the side plate portions 38 on both sides are brought close to each other with the side plate portions 38 on both sides being parallel to each other, it is unclear whether the reaction force plate portion 46 is bent upward or curved downward, but the rubber sheet When the structure 36 is inserted between the end portions 14 facing each other, if the upper ends of the side plate portions 38 on both sides are deformed so as to approach each other, the reaction force plate portion 46 is bent and deformed downward.
In this case, the reaction force plate portion 46 may be curved and deformed upward, but when the reaction force plate portion 46 is curved and deformed downward, the appearance of the water stop device 34 for the road bridge expansion and contraction device is improved. Is advantageous.
If the first shape is a curved shape that is slightly convex downward in advance, the reaction force plate portion 46 can be surely bent and deformed downward when the side plate portions 38 on both sides are brought close to each other. it can. The first shape may be such a shape, but if the first shape is a flat plate shape as described above, the side plate portions 38 on both sides are elastically brought into contact with the end surfaces 14A of the end portions 14 facing each other. This is advantageous in obtaining an elastic contact force.

As shown in FIG. 3, in the present embodiment, the reaction force plate portion 46 is provided over substantially the entire length in a direction orthogonal to the bridge axis direction of the pair of joint members 18 below the pair of joint members 18. Except for both ends in the width direction of the plate portion 46, the reaction force plate portion 46 is formed with a uniform thickness.
When viewed in a plan view, both ends of the lower plate portion 40 project outward from both ends of the pair of joint members 18 and both ends of the reaction force plate portion 46 in the direction orthogonal to the bridge axis direction. As shown in FIG. 4, standing walls 4002 that connect the side plate portions 38 on both sides are erected at both ends in the direction orthogonal to the direction, and on the lower plate portion 40 at locations near both ends of the lower plate portion 40. A drainage pipe portion 4004 for discharging rainwater accumulated in the projection protrudes, and a drainage pipe (not shown) is connected to the drainage pipe portion 4004.

The locking member 42 protrudes from the side plate portions 38 on both sides to the outside in the width direction of the rubber sheet structure 36, and is in a state where the side plate portions 38 on both sides are in elastic contact with the end surfaces 14A of the end portions 14 facing each other. 22 can be locked to the bottom surface 22A.
The rubber sheet structure in a state in which the plurality of locking members 42 protruding from the side plate portions 38 on both sides are locked to the bottom surface 22A of the concave portion 22 of the end portions 14 facing each other of the elements constituting the road bridge 12. 36 is suspended between the end portions 14 facing each other.
In the present embodiment, the locking member 42 is formed of a steel pin 4202 and protrudes from a position near the upper end of the side plate portion 38, in other words, protrudes from the upper portion of the side plate portion 38, and A plurality of side plates 38 are provided at intervals in the length direction over the entire length in the length direction.

The side plate portion 38 is embedded with a support plate 4204 made of steel and having flat surfaces in the thickness direction, and a plurality of pins protrude from the upper portion of the support plate 4204. In other words, a plurality of pins 4202 is supported by a support plate 4204, and the mounting strength of the pins 4202 to the side plate portion 38 is ensured.
In the present embodiment, the plurality of pins 4202 are locked to the bottom surface 22A of the recess 22 and the side plate portions 38 on both sides are elastically contacted with the end surfaces 14A of the end portions 14 of the elements constituting the road bridge 12 facing each other. Thus, the support plate 4204 is embedded in the side plate portion 38 so that the support plate 4204 is parallel to the end surface 14A of the end portion 14.
More specifically, the surface of the support plate 4204 facing the end surface 14A of the end portion 14 in a state where the side plate portions 38 on both sides are elastically contacted with the end surfaces 14A of the end portions 14 facing each other of the elements constituting the road bridge 12. However, the support plate 4204 is embedded in the side plate portion 38 so that the support plate 4204 is parallel to the end surface 14A of the end portion 14.
This ensures the flatness of the side plate portions 38 on both sides when the side plate portions 38 on both sides are elastically contacted with the end surfaces 14A of the opposite end portions 14 of the elements constituting the road bridge 12. This is advantageous in improving the adhesion of the side plate portions 38 on both sides to the end surface 14A and preventing the rainwater from flowing down the road bridge 12.
Further, since the lower part of the support plate 4204 is located at the position of the side plate portion 38 to which the reaction force plate portion 46 is connected, the elastic force of the reaction force plate portion 46 is also received by the support plate 4204 and the side plate portions 38 on both sides are received. It is more advantageous in securing flatness, improving the adhesion of the side plate portions 38 on both sides with respect to the end surface 14A of the end portion 14, and preventing the rainwater from flowing down the road bridge 12.

In the present embodiment, when installing the water stop device 34 for the road bridge expansion and contraction device, first, when the rubber sheet structure 36 is inserted between the ends 14 facing each other of the elements constituting the road bridge 12, An external force is applied so that the upper ends of the side plate portions 38 on both sides come close to each other, and the reaction force plate portion 46 is deformed so as to be convexly curved downward from the first shape, and then in this deformed state, the rubber sheet structure 36 is inserted between the end portions 14 of the floor slab 16 facing each other, and the plurality of pins 4202 of the side plate portions 38 on both sides are locked to the bottom surface 22A of the recess 22 of the end portions 14 on both sides to release the external force.
By inserting the rubber sheet structure 36, the plurality of pins 4202 of the side plate portions 38 on both sides are locked to the bottom surface 22A of the concave portion 22 of the end portions 14 on both sides, and the reaction force in which the side plate portions 38 on both sides are curved and deformed. The plurality of pins 4202 are elastically contacted with the end surfaces 14A of the end portions 14 facing each other by the elastic force of the plate portions 46, and the side plate portions 38 on both sides are elastically contacted with the end surfaces 14A of the end portions 14, so The state locked to 22A is maintained.
In other words, due to the frictional force based on the elastic contact of the end portions 14 of the side plate portions 38 on both sides with the end surface 14A and the locking force by the plurality of pins 4202, the side plate portions 38 on both sides are connected to each other. Attached to the opposite end 14 and fixed.
Therefore, the rubber sheet structure 36 is held in a state of being suspended between the end portions 14 facing each other of the elements constituting the road bridge 12 and assembled to the end portions 14 facing each other.

Specifically, in a state where the positions of the rubber sheet structure 36 in the vertical direction and the bridge axis direction are positioned, the rubber sheet structure 36 is held in a suspended state between the opposed end portions 14, and It is assembled | attached between the edge parts 14 which oppose.
Thereafter, the pair of joint members 18 are assembled to the recess 22 via the reinforcing bars 24 and the anchor member 30, and the recessed portion 22 is filled with the post-cast concrete 32, and the road bridge extension device 10 and the water stop device 34 for the road bridge extension device are provided. Installation work is completed.
In the present embodiment, since the lower end of the side plate portion 26 of the pair of joint members 18 is placed on the bottom surface 22A of the recess 22, an open groove 48 is formed below the lower end of the side plate portion 26. A plurality of pins 4202 are provided at intervals in the length direction of the side plate portion 26, and the plurality of pins 4202 are accommodated in the grooves 48 to prevent interference between the pins 4202 and the lower ends of the side plate portions 26.

Therefore, according to the present embodiment, as in the prior art, the assembly work of the mounting hardware, the welding work of the mounting hardware to the rebar, and the side plate portions 38 on both sides of the rubber sheet structure 36 are used at a plurality of locations using bolts. The attachment work for attaching to the attachment hardware can be omitted, and it is advantageous for easily and surely installing the water stop device 34 for the road bridge expansion and contraction device.
Therefore, it is advantageous in shortening the construction period of the installation of the water stop device 34 for the road bridge expansion / contraction device and reducing the cost of the road bridge expansion / contraction device 10 including the water stop device 34 for the road bridge expansion / contraction device.
In addition, as the elastic contact portion 44, another member such as a coil spring separate from the rubber sheet structure 36 may be provided, and the side plate portions 38 on both sides may be elastically contacted with the end surface 14 </ b> A of the end portion 14 facing each other. .
Alternatively, a reaction force plate portion 46 that is separate from the rubber sheet structure 36 is provided, and both ends in the width direction of the reaction force plate portion 46 that is the bridge axis direction are attached to the side plate portions 38 on both sides by attachment members such as bolts, or It may be attached by an adhesive, or may be attached by being fitted into the concave grooves of the side plate portions 38 on both sides.
However, if the reaction force plate portion 46 provided integrally with the rubber sheet structure 36 is provided as in the embodiment, the number of parts can be reduced, and the installation work of the water stop device 34 for the road bridge expansion and contraction device is more efficient. It is advantageous to perform well.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIG.
In the following embodiments, the same parts and members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. The parts different from the first embodiment are mainly described. To do.
In the second embodiment, a plurality of reaction force plate portions 46 are provided at intervals in the length direction of the rubber sheet structure 36, that is, the reaction force plate portion 46 is the length of the rubber sheet structure 36. The difference from the first embodiment is that a plurality of parts separated in the direction are provided.
Whether the reaction force plate portion 46 is provided over the entire length in the length direction of the rubber sheet structure 36 or a plurality of the reaction force plate portions 46 at intervals in the length direction of the rubber sheet structure 36 depends on the required elastic force. It is determined appropriately according to
Also according to the second embodiment, as in the first embodiment, the side plate portions 38 on both sides are elastically contacted with the end surface 14A of the end portion 14 so that the plurality of pins 4202 are formed in the recesses 22. The state of being locked to the bottom surface 22A is maintained, and the rubber sheet structure 36 can be easily assembled between the opposing end portions 14 of the elements constituting the road bridge 12, as in the first embodiment. The effect is played.

(Third embodiment)
Next, a third embodiment will be described with reference to FIG.
In the third embodiment, the structure of the locking member 42 is different from that of the first embodiment.
In the third embodiment, as shown in FIGS. 6 (A) and 6 (B), angle irons whose flanges are orthogonal to each other are used instead of the support plate 4204 and the plurality of pins 4202. In this embodiment, the angle steel 4210 is an equilateral angle steel 4210 in which the protrusion heights of the two flanges 4210A and 4210B are equal.
One flange 4210A of the two flanges 4210A and 4210B of the equilateral angle steel 4210 protrudes from the upper end of the side plate portions 38 on both sides to the outside in the width direction of the rubber sheet structure 36, and the side plate portions 38 on both sides face each other. In a state where it is elastically contacted with the end surface 14A of the end portion 14 to be engaged, it can be locked to the bottom surface 22A of the concave portion 22, and therefore, one flange 4210A constitutes the locking member 42.
Of the two flanges 4210A and 4210B of the equilateral angle steel 4210, the other flange 4210B is embedded in the side plate portion 38, and the mounting strength of one flange 4210A (the locking member 42) with respect to the side plate portion 38 is ensured. The flange 4210 </ b> B constitutes a support plate portion that supports the locking member 42.
In the present embodiment, the isosceles angle steel 4210 is provided over the entire length in the length direction of the side plate portion 38, and one flange 4210 </ b> A protrudes over the entire length in the length direction of the side plate portion 38.
If the side plate portions 38 on both sides are elastically contacted with the end surface 14A of the end portion 14 so that the state where one flange 4210A is locked to the bottom surface 22A of the concave portion 22 is stably held, an isosceles mountain shape A plurality of steel 4210 may be provided such that a plurality of steel 4210 are provided at intervals in the length direction of the side plate portion 38.

In the third embodiment, one flange 4210A of the side plate portions 38 on both sides is locked to the bottom surface 22A of the concave portion 22 of the end portions 14 on both sides, and the reaction force plate portions 46 in which the side plate portions 38 on both sides are curved and deformed. The rubber sheet structure 36 is suspended in a predetermined state between the opposing end portions 14 of the elements constituting the road bridge 12 by elastic contact with the end surfaces 14A of the opposing end portions 14 by the elastic force of The state is maintained and assembled to the end portions 14 facing each other.
In this state, one flange 4210A of the side plate portions 38 on both sides extends along the length direction of the side plate portion 38 on the bottom surface 22A of the concave portion 22 of the end portions 14 on both sides, and is shown in FIG. As described above, in a state where the pair of joint members 18 are assembled to the concave portion 22 via the reinforcing bars 24 and the anchor members 30, the lower ends of the side plate portions 26 of the pair of joint members 18 are placed on one flange 4210A. The recessed portion 22 is filled with post-cast concrete 32, and the installation work of the road bridge expansion / contraction device 10 and the road bridge expansion / contraction device water stop device 34 is completed.
According to the third embodiment, the same effects as those of the first embodiment can be obtained, and in addition to the support plate 4204 and the plurality of pins 4202, commercially available angle steel 4210 is used. This is advantageous in reducing the cost of the water stop device 34 for the road bridge expansion and contraction device.
Similarly to the first embodiment, one flange 4210A is engaged with the bottom surface 22A of the recess 22 and the side plate portions 38 on both sides are end surfaces 14A of the end portions 14 of the elements constituting the road bridge 12 facing each other. Since the other flange 4210A is embedded in the side plate portion 38 so as to be parallel to the end face 14A of the end portion 14 in the state of being elastically contacted with each other, the side plate portions 38 on both sides are mutually connected to the elements constituting the road bridge 12. When it is elastically contacted with the end surface 14A of the opposing end portion 14, the flatness of the side plate portions 38 on both sides is secured, the adhesion of the side plate portions 38 on both sides to the end surface 14A of the end portion 14 is improved, and the rainwater road bridge 12 This is advantageous in preventing the downward flow of the gas.
Further, since the lower portion of the other flange 4210B is located at the position of the side plate portion 38 to which the reaction force plate portion 46 is connected, the other flange 4210B receives the elastic force of the reaction force plate portion 46 and both side plate portions. 38 is ensured, the adhesion of the side plate portions 38 on both sides to the end surface 14A of the end portion 14 is enhanced, and it is advantageous in preventing the rainwater from flowing down the road bridge 12.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIG.
In the fourth embodiment, a spring steel plate 50 is embedded in the reaction force plate portion 46 of the first embodiment so as to extend over substantially the entire width direction that is the bridge axis direction of the reaction force plate portion 46. is there.
As shown in FIG. 8A, the spring steel plate 50 is a second plate that extends along the reaction force plate portion 46 inside the reaction force plate portion 46 with no external force applied to the rubber sheet structure 36. In other words, the second shape extends along the first shape, and the plurality of pins 4202 of the side plate portions 38 on both sides are engaged with the bottom surface 22A of the recess 22 as shown in FIG. In a state in which the side plate portions 38 on both sides are in elastic contact with the end surfaces 14A of the end portions 14 facing each other, the reaction force plate portion 46 and the reaction force plate portion 46 are elastically deformed from the second shape to return to the second shape. In cooperation, the side plate portions 38 on both sides are elastically brought into contact with the end surfaces 14A of the end portions 14 facing each other.
The spring steel plate 50 is embedded over the entire length of the reaction force plate portion 46 in the length direction.
Therefore, in the fourth embodiment, the elastic contact portion 44 is constituted by the reaction force plate portion 46 including the spring steel plate 50.
According to the fourth embodiment, the same effects as those of the first embodiment can be obtained, and it is advantageous in elastically contacting the side plate portions 38 on both sides with the end surface 14A of the end portion 14 with a larger elastic contact force. It is advantageous in suspending the rubber sheet structure 36 in a more stable state between the mutually opposing ends 14 of the elements constituting the road bridge 12.
If the side plate portions 38 on both sides are elastically contacted with the end surface 14A of the end portion 14 so that the state in which the locking member 42 is locked to the bottom surface 22A of the recess 22 is stably held, the spring steel plate It is arbitrary, such as embedding a plurality of 50 at intervals in the length direction of the reaction force plate portion 46.
This fourth embodiment can be applied to the first to third embodiments.

(Fifth embodiment)
Next, a fifth embodiment will be described with reference to FIG.
In the fifth embodiment, as shown in FIGS. 9A and 9B, the side plate portions 38 on both sides that are elastically contacted with the end surfaces 14A of the opposite end portions 14 of the elements constituting the road bridge 12 are used. The first embodiment is different from the first embodiment in that an inclined surface 3802 that gradually separates from the end surface 14A as it goes upward is formed over the entire length of the side plate portion 38 in the upper part of the outer surface.
In the fifth embodiment, after the rubber sheet structure 36 is installed on the end portions 14 of the elements constituting the road bridge 12 facing each other, as shown in FIG. 14 is filled with a sealing material 52 and hermetically closed.
According to the fifth embodiment, even if the end surface 14A of the end 14 facing each other of the elements constituting the road bridge 12 has irregularities, it is more effective in preventing the rain water from falling downward. It will be advantageous.
The fifth embodiment can be applied to the first to fourth embodiments.

(Sixth embodiment)
Next, a sixth embodiment will be described with reference to FIGS.
In the sixth embodiment, the rubber sheet structure 36 is inserted between the opposing end portions 14 of the elements constituting the road bridge 12 in order to improve the appearance of the water stop device 34 for the road bridge expansion and contraction device. In other words, in other words, when the side plate portions 38 on both sides are displaced in a direction approaching each other, the reaction force plate portion 46 is deformed in a leading manner as compared with other portions, and the reaction force plate portion 46 is curved and deformed. In the present embodiment, which is defined in a desired direction, a deformation promoting portion 54 is provided that defines the direction in which the reaction force plate portion 46 is bent and deformed downward.
The deformation accelerating portion 54 is made by providing a material for the upper surface portion and the lower surface portion of the reaction force plate portion 46 by providing a cutout portion in the reaction force plate portion 46, or by changing the thickness of the reaction force plate portion 46. It can be configured by changing.
10 (A) to (D) and FIGS. 11 (A) to (C) are cross-sectional views of the rubber sheet structure 36 in a state where no external force is applied, and the reaction force plate portion 46 has both ends in the bridge axis direction. That is, the reaction force plate portion 46 is formed with a uniform thickness except for both ends in the width direction.

In the example shown in FIG. 10A, the deformation promoting portion 54 is configured by providing an arc-shaped notch 4602 at the center in the width direction of the upper surface of the reaction force plate portion 46.
In the example shown in FIG. 10B, the deformation promoting portion 54 is configured by providing a square notch 4604 at the center in the width direction of the upper surface of the reaction force plate portion 46.
In the example shown in FIG. 10C, the deformation promoting portion 54 is configured by providing a V-shaped notch 4606 at the center in the width direction of the upper surface of the reaction force plate portion 46.
In the example shown in FIG. 10D, the upper surface of the reaction force plate portion 46 is formed as a flat surface, and a bulging portion 4608 is provided at the center of the lower surface of the reaction force plate portion 46 in the width direction. The thickness in the center in the width direction is formed larger than the remaining portions.
In the example shown in FIG. 11A, the deformation promoting portion 54 is configured by providing a plurality of arc-shaped notches 4602 at intervals in the width direction of the upper surface of the reaction force plate portion 46.
In the example shown in FIG. 10B, the deformation promoting portion 54 is configured by providing a plurality of arc-shaped notches 4602 at intervals in the width direction of the lower surface of the reaction force plate portion 46.
In the example shown in FIG. 10C, a plurality of arc-shaped notches 4602 are provided at intervals in the width direction of the upper surface of the reaction force plate portion 46, and adjacent notches on the upper surface are spaced at intervals in the width direction of the lower surface. The deformation promoting portion 54 is configured by providing a plurality of arc-shaped notches 4602 in the middle of the portion 4602.
The notch portions 4602, 4604, 4606, and the bulging portion 4608 may be provided continuously in the longitudinal direction of the reaction force plate portion 46, which is a direction orthogonal to the bridge axis direction, or the reaction force plate portion. 46 may be provided at intervals in the longitudinal direction.
According to the sixth embodiment, it is possible to determine the direction in which the reaction force plate portion 46 is curved and deformed by the deformation promoting portion 54, which is advantageous in easily installing the rubber sheet structure 36, and the road bridge. This is advantageous in enhancing the appearance of the water stop device 34 for the expansion device easily and reliably.
This sixth embodiment is applicable to the first to fifth embodiments, and in the fourth embodiment, the deformation promoting portion is provided at the position of the reaction force plate portion 46 that covers the upper surface of the spring steel plate 50. 54 will be provided.

(Seventh embodiment)
Next, a seventh embodiment will be described with reference to FIGS.
The seventh embodiment is different from the first embodiment in that the rubber sheet structure 36A is composed of side plate portions 38 and reaction force plate portions 46A on both sides and does not have the lower plate portion 40. Is different.
As in the first embodiment, the water stop device 34 for the road bridge expansion and contraction device of the seventh embodiment extends in the direction orthogonal to the width and the bridge axis direction of the road bridge 12. A rubber sheet structure 36A that has an existing length and closes a gap between the end surfaces 14A of the end portions 14 facing each other is provided.
The rubber sheet structure 36A includes both side plate portions 38 that are provided at both ends in the width direction and can respectively contact the end surfaces 14A of the end portions 14 that face each other, locking members 42 embedded in the side plate portions 38 on both sides, A reaction force plate portion 46A extending in the width direction and connecting the side plate portions 38 on both sides.

The locking member 42 is the same as in the first embodiment, and includes a steel pin 4202.
That is, a steel support plate 4204 is embedded in the side plate portion 38, and a plurality of pins 4202 protrude from the upper portion of the support plate 4204, securing the mounting strength of the pins 4202 to the side plate portion 38, and The side plate portion 38 can be locked to the bottom surface 22A of the concave portion 22 in a state where the side plate portion 38 is in elastic contact with the end surface 14A of the end portion 14 facing each other.
Also in the present embodiment, the plurality of pins 4202 are locked to the bottom surface 22A of the recess 22, and the side plate portions 38 on both sides are elastically contacted with the end surfaces 14A of the end portions 14 of the elements constituting the road bridge 12 facing each other. Thus, the support plate 4204 is embedded in the side plate portion 38 so that the support plate 4204 is parallel to the end surface 14A of the end portion 14.

As shown in FIG. 12A, the reaction force plate portion 46A has a third shape in a state where no external force is applied to the rubber sheet structure 36A. In the present embodiment, the third shape is a shape extending on a plane between the side plate portions 38 on both sides, in other words, a flat plate shape.
Then, in a state where the side plate portions 38 on both sides are in contact with the end surfaces 14A of the end portions 14 facing each other, the reaction force plate portion 46A protrudes downward from the third shape as shown in FIG. The side plate portions 38 on both sides are elastically brought into contact with the end surfaces 14 </ b> A of the end portions 14 of the elements constituting the road bridge 12 by the elastic force of the reaction force plate portion 46 </ b> A that is bent and deformed to return to the third shape.
Therefore, the elastic contact portions 44 that elastically contact the side plate portions 38 on both sides with the end portions 14 facing each other are constituted by the reaction force plate portions 46A.
The portion where both ends in the width direction of the reaction force plate portion 46A are connected to the side plate portions 38 on both sides may be the upper end of the side plate portion 38 or the lower end of the side plate portion 38, but in this embodiment, the reaction force Both ends in the width direction of the plate portion 46A are connected to intermediate portions in the vertical direction (height direction) of the side plate portions 38 on both sides, and the elastic force of the reaction force plate portion 46A trying to return to the third shape is applied to the side plates on both sides. It is designed so that it can be efficiently transmitted to the portion 38.

Further, the reaction force plate portion 46 </ b> A also functions as a location for receiving rainwater that falls downward from the uneven gap S of the pair of joint members 18. In other words, the reaction force plate portion 46A also functions as the lower plate portion 40 of the first embodiment. Therefore, the reaction force plate portion 46A is the length of the road bridge expansion / contraction device 10 in the direction orthogonal to the bridge axis direction. Extends the entire length of the direction.
When viewed in plan in a direction orthogonal to the bridge axis direction, both ends in the length direction of the reaction force plate portion 46A protrude outward from both ends of the pair of joint members 18, and both ends of the reaction force plate portion 46A As shown in FIG. 13, standing walls 4610 that connect the side plate portions 38 on both sides are erected, and for draining rainwater collected on the reaction force plate portion 46A at positions near both ends of the reaction force plate portion 46A. A drain pipe portion 4612 is projected, and a drain pipe (not shown) is connected to the drain pipe portion 4612.

According to the seventh embodiment, as in the first embodiment, the rubber sheet structure 36A is inserted between the mutually opposing end portions 14 of the elements constituting the road bridge 12, so that the rubber sheet Since the structure 36A is fixed between the end portions 14 facing each other, the assembly work of the mounting hardware, the welding work of the mounting hardware to the reinforcing bar 24, and the side plate portions on both sides of the rubber sheet structure 36A as in the prior art. The attachment work which attaches 38 to an attachment hardware using a bolt in a plurality of places can be omitted, and it is advantageous when installing the water stop device 34 for a road bridge expansion and contraction device easily and surely.
Therefore, it is advantageous in shortening the construction period of the installation of the water stop device 34 for the road bridge expansion / contraction device and reducing the cost of the road bridge expansion / contraction device 10 including the water stop device 34 for the road bridge expansion / contraction device.
Further, since the lower plate portion 40 is not provided as compared with the first embodiment, the structure of the rubber sheet structure 36 can be simplified and reduced in weight, and the cost of the water stop device 34 for the road bridge expansion and contraction device can be reduced. This is advantageous.

Note that the third to sixth embodiments described above can be applied to the seventh embodiment.
Further, the reaction plate portion 46A is not provided in the rubber sheet structure 36A, but a connection plate portion having the same shape as the reaction force plate portion 46A for connecting the intermediate portions in the vertical direction of the side plate portions 38 on both sides is provided. Then, a spring steel plate having a third shape is embedded in the state where no external force is applied, and the side plate portions 38 on both sides are curved and deformed from the third shape in a state where the side plate portions 38 are in contact with the end surfaces 14A of the end portions 14 facing each other. The side plate portions 38 on both sides may be elastically brought into contact with the end surfaces 14A of the end portions 14 facing each other only by the elastic force of the spring steel plate to return to the shape.
In this case, the reaction force plate portion 46A is constituted by the connection plate portion in which the spring steel plate is embedded.

In the present embodiment, the side plate portions 38 on both sides are not in contact with the end surfaces 14A of the end portions 14 of the elements constituting the road bridge 12, that is, external force is applied to the rubber sheet structures 36, 36A. Although the case where the first and third shapes of the reaction force plate portions 46 and 46A that are not hung and the second shape of the spring steel plate 50 have a flat plate shape has been described, the first to third shapes are The shape may be curved, and the first to third shapes are not limited to the shapes of the embodiment.
In addition, the case where the reaction force plate portion 46 has a downwardly curved curved shape in a state where the side plate portions 38 on both sides are in contact with the end surfaces 14A of the end portions 14 facing each other has been described. The shape in which the force plate portion 46 is compressed may be a shape in which an upward convex curved portion and a downward convex curved portion are alternately arranged in the bridge axis direction. It is not limited.

DESCRIPTION OF SYMBOLS 10 Road bridge expansion-contraction apparatus 12 Road bridge 14 End part 14A End surface 18 Joint member 22 Recessed part 22A Bottom face 34 Water bridge expansion / contraction apparatus water stop device 36 Rubber sheet structure 36A Rubber sheet structure 38 Side plate part 3802 Inclined surface 40 Lower plate part 42 Locking member 4204 Support plate 44 Elastic contact portion 46 Reaction force plate portion 46A Reaction force plate portion 50 Spring steel plate 54 Deformation promoting portion

Claims (10)

Opening recesses are provided at the ends facing each other of the elements constituting the road bridge in an open state toward the facing end portions, respectively.
A joint portion of the road bridge is formed together with mutually opposing ends of the elements constituting the road bridge, and is formed to extend in a direction perpendicular to the bridge axis direction of the road bridge between the end faces of the opposite ends. A road bridge expansion and contraction device that absorbs expansion and contraction between play is attached via post-cast concrete filled in the recess,
A waterstop device for a road bridge expansion / contraction device provided below the road bridge expansion / contraction device between mutually opposing ends of the elements constituting the road bridge,
The water stop device for the road bridge expansion and contraction device includes a rubber sheet structure having a width extending in a bridge axis direction of the road bridge and a length extending in a direction orthogonal to the bridge axis direction,
The rubber sheet structure is
Side plate portions on both sides that are provided at both ends in the width direction and can contact the end surfaces of the end portions facing each other;
A lower plate part extending over the entire length of the road bridge expansion and contraction device in the direction orthogonal to the bridge axis direction and extending in the width direction to connect the lower ends of the side plate parts on both sides;
Elastic contact portions for elastically contacting the side plate portions on both sides to the end surfaces of the opposite end portions;
A locking member that protrudes outward in the width direction from the side plate portions on both sides and that can be locked to the bottom surface of the recess in a state where the side plate portions on both sides are in elastic contact with the end surfaces of the opposite ends;
A water stop device for a road bridge expansion and contraction device, comprising: Opening recesses are provided at the ends facing each other of the elements constituting the road bridge in an open state toward the facing end portions, respectively.
A joint portion of the road bridge is formed together with mutually opposing ends of the elements constituting the road bridge, and is formed to extend in a direction perpendicular to the bridge axis direction of the road bridge between the end faces of the opposite ends. A road bridge expansion and contraction device that absorbs expansion and contraction between play is attached via post-cast concrete filled in the recess,
A waterstop device for a road bridge expansion / contraction device provided below the road bridge expansion / contraction device between mutually opposing ends of the elements constituting the road bridge,
The water stop device for the road bridge expansion and contraction device includes a rubber sheet structure having a width extending in a bridge axis direction of the road bridge and a length extending in a direction orthogonal to the bridge axis direction,
The rubber sheet structure is
Side plate portions on both sides that are provided at both ends in the width direction and can contact the end surfaces of the end portions facing each other;
A reaction force plate portion extending over the entire length of the road bridge expansion and contraction device in the direction orthogonal to the bridge axis direction and extending in the width direction and connecting the side plate portions on both sides;
The reaction plate portion has a third shape when no external force is applied to the rubber sheet structure, and the third shape with the side plate portions on both sides in contact with the end surfaces of the opposite ends. Elastically contacting the side plate portions on both sides with the end surfaces of the opposite ends by elastic force that is curved and deformed from
A water stop device for a road bridge expansion / contraction device. The rubber sheet structure extends in the width direction above the lower plate portion to connect the side plate portions on both sides, and has a first shape in a state where no external force is applied to the rubber sheet structure, The side plate portions on both sides are opposed to each other by an elastic force that is bent and deformed from the first shape in a state where the side plate portions on both sides are in contact with the end surfaces of the opposite end portions. A reaction force plate part elastically contacting the end surface of the end part is integrally provided,
The elastic contact portion is composed of the reaction force plate portion,
The water stop device for a road bridge expansion and contraction device according to claim 1. The reaction force plate portion is provided over the entire length in the length direction of the rubber sheet structure.
The water stop device for a road bridge expansion and contraction device according to claim 3. A plurality of the reaction force plate portions are provided at intervals in the length direction of the rubber sheet structure.
The water stop device for a road bridge expansion and contraction device according to claim 3. A spring steel plate extending in the width direction that is the bridge axis direction of the reaction force plate portion is embedded in the reaction force plate portion,
The spring steel plate has a second shape extending along the first shape in the state where no external force is applied to the rubber sheet structure, and the side plate portions on both sides are on end surfaces of the end portions facing each other. The side plate portions on both sides are made to be end surfaces of the opposite ends in cooperation with the reaction force plate portion by an elastic force that is bent and deformed from the second shape in a contact state and tries to return to the second shape. Let it hit,
The water stop device for a road bridge expansion and contraction device according to any one of claims 2 to 5. Support plates that have rigidity and support the locking member are embedded in the side plate portions on both sides,
The support plate is parallel to the end surface of the end portion in a state where the side plate portions on both sides are elastically contacted with the end surfaces of the opposite ends of the elements constituting the road bridge.
The water stop device for a road bridge expansion and contraction device according to any one of claims 1 to 6. The locking member is projected from the upper part of the support plate,
The lower part of the support plate is located at the location of the side plate part to which the reaction force plate part is connected,
The water stop device for a road bridge expansion and contraction device according to claim 7. When the side plate portions on both sides are displaced in a direction approaching each other, the reaction force plate portion is provided with a deformation promoting portion that deforms in advance and determines the direction of bending deformation compared to other locations.
The water stop device for a road bridge expansion and contraction device according to any one of claims 2 to 8. On the outer surface of the side plate portions on both sides that are in pressure contact with the end surface of the end portion, an inclined surface gradually separating from the end surface is formed as it goes upward.
The water stop device for a road bridge expansion and contraction device according to any one of claims 1 to 9.

Images