JP2019039274A - Filling structure for road bridge expansion device - Google Patents

Abstract

To provide a filling structure for a road bridge expansion device in which a filling member can be arranged in an irregular gap only when it is necessary while suppressing the increase in the number of components and the weight, and abrasion along with the running of a vehicle is reduced to provide excellent durability while ensuring the smooth running of a two-wheeled vehicle.SOLUTION: As shown in Fig. 2(A), in the state where a gap S becomes smallest, a vertical displacement part 16A is located to be displaced in the most lowered position. Along with this, a filling body 3204 is also located to be displaced in the most lowered position, so that the filling body 3204 is located at the position with a distance downward the gap S between the mutually-opposed lateral sides of a v-shaped protrusion 28 (between lateral apical surfaces 2006B). As shown in Fig. 2(C), when the gap S becomes largest, the vertical displacement part 16A is located to be displaced in the most raised position. Along with this, the filling body 3204 is also located to be displaced in the most raised position so as to be located on the top of the gap S between the mutually-opposed lateral sides of the v-shaped protrusion 28 (between lateral apical surfaces 2006B) to fill a part of the gap S.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a filling structure 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 / contraction device that absorbs expansion and contraction of the floor slab due to a temperature difference between seasons.
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 joint members that are attached to form a gap extending in a direction orthogonal to the bridge axis direction, and a water stop member that is disposed below the joint members and can be expanded and contracted in the bridge axis direction (Patent Document 1). ).
In such a road bridge expansion / contraction device, a gap extending in a direction perpendicular to the bridge axis direction is formed between the pair of joint members, so that depending on the size of the gap, the wheels of the motorcycle fit into the two-wheeled vehicle. This is disadvantageous for the purpose of driving smoothly.
Therefore, a space filling structure for a road bridge expansion / contraction device in which a part of the gap is closed by a space filling member has been proposed (Patent Document 2).

JP 2008-57246 A JP 2000-96503 A

On the other hand, in the road bridge expansion and contraction device, when the size of the uneven gap in the bridge axis direction may increase, the wheels of the motorcycle may get stuck, but the uneven gap in the bridge axis direction is small. Such problems are unlikely to occur.
However, in the conventional filling structure for a road bridge expansion and contraction device, the filling member is always located in the gap regardless of the size of the gap, and the filling member is worn as the vehicle travels. There is a problem of poor durability.
The present invention has been made in view of such circumstances, and the object of the present invention is to suppress the increase in the number of parts and the weight increase, and to arrange the stuffing member in the uneven gap only when necessary, An object of the present invention is to provide a narrowing structure for a road bridge expansion and contraction device that is excellent in durability by reducing wear caused by traveling of the vehicle while ensuring smooth traveling of the motorcycle.

In order to achieve the above object, the invention according to claim 1 comprises a seam portion of the road bridge together with mutually opposing ends of elements constituting the road bridge having a pair of face plates facing each other, A water stop member is provided that can extend and contract in the bridge axis direction and connects the ends facing each other below the surface plate, and extends in a direction intersecting the bridge axis direction between the front end surfaces of the pair of surface plates. In this case, the water stop member has a small dimension in the bridge axis direction of the uneven gap. A vertical displacement part that is displaced downward when the dimension is increased, and the interstitial member is located at a position of the vertical displacement part corresponding to the lower part of the uneven gap. When the dimensions are reduced, the uneven shape Located at a position spaced below the gaps, characterized in that located in the uneven gaps increased if the uneven clearance is increased.
According to a second aspect of the present invention, the padding member includes a leg portion that stands up from the vertical displacement portion, and a padding main body that is provided at an upper end of the leg portion and advances and retracts into the uneven gap. It is characterized by that.
The invention according to claim 3 is characterized in that both side portions of the padding main body facing the tip surface forming the concavo-convex gap are formed with inclined surfaces that approach each other toward the upper end.
According to a fourth aspect of the present invention, the planar view shape of the padding main body is formed in an elongated shape along the extending direction of the concavo-convex gap in which the padding main body advances and retreats.
The invention according to claim 5 is characterized in that the pair of surface plates have a plurality of V-shaped convex portions that are alternately arranged in a direction intersecting with the bridge axis direction and constitute the concave-convex gap, Is provided so as to advance and retreat in the gap between the side portions of the two adjacent V-shaped convex portions facing each other.
According to a sixth aspect of the present invention, the water stop member has a base portion attached to the opposite end portions and a bellows portion connecting the base portions, and the vertical displacement portion is the bellows portion. It is characterized by.
The invention according to claim 7 is characterized in that the padding member is formed integrally with the water stop member.

According to the first aspect of the present invention, when the size of the gap in the bridge axis direction is small and no gap member is required, the gap member is positioned at a position away from the gap, and the gap becomes larger. When it is desirable to close a part of the material, that is, when a space member is required, the space member can be arranged in the uneven gap. Therefore, it is possible to provide a narrowing structure for a road bridge expansion / contraction device that is excellent in durability by reducing wear of the narrowing member accompanying traveling of the vehicle while ensuring smooth traveling of the motorcycle.
In addition, since the interlining member is lifted and lowered using the bellows portion of the water stop member, it is not necessary to provide any other member such as an actuator, and thus the above-mentioned while suppressing an increase in the number of parts and an increase in weight. It is possible to achieve the effect.
According to the second aspect of the present invention, for example, the outline of the padding main body is formed with a larger outline than the legs, which is advantageous for smooth running of the motorcycle while suppressing an increase in the weight of the padding member. It becomes.
According to the invention described in claim 3, it is advantageous to smoothly advance and retreat the space between the stuffing main bodies.
According to the fourth aspect of the present invention, a part of the gap can be closed with the main body having a larger outline, which is advantageous for smooth running of the motorcycle.
According to the invention described in claim 5, it is advantageous in achieving smooth running of the motorcycle.
According to the sixth aspect of the invention, it is advantageous for smooth running of the motorcycle while suppressing an increase in the number of parts and suppressing an increase in weight.
According to the seventh aspect of the invention, it is advantageous in reducing the cost.

It is sectional drawing which fractured | ruptured the road bridge expansion / contraction apparatus to which the narrowing structure for road bridge expansion / contraction apparatuses of embodiment was applied in the perpendicular surface parallel to a bridge axis. (A)-(C) are sectional drawings of the road bridge expansion-contraction apparatus explaining the movement of the filling structure for road bridge expansion-contraction apparatuses. (A)-(C) are the expanded sectional views of the principal part explaining the movement of the filling structure for road bridge expansion-contraction apparatuses. (A)-(C) is a top view of the road bridge expansion-contraction apparatus explaining the movement of the filling structure for road bridge expansion-contraction apparatuses. It is a perspective view of a filling member.

Next, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the road bridge is configured by arranging a large number of floor slabs 2 supported by piers in the direction of the bridge axis, and the joint portions 4 of the floor slabs 2 are the ends of the floor slabs 2 facing each other. Part and the road bridge expansion-contraction apparatus 10 are comprised.
The road bridge expansion and contraction device 10 includes a pair of joint members 14, a water stop member 16, and a padding member 32.

The pair of joint members 14 are respectively attached to the end portions of the opposite floor slab 2 and move in the bridge axis direction integrally with the floor slab 2 in accordance with the expansion and contraction of the floor slab 2 in the bridge axis direction.
The joint member 14 includes a surface plate 20, a side plate 22, and an anchor member 24. The surface plate 20 and the side plate 22 are integrally formed of a steel material.
The surface plates 20 of the pair of joint members 14 are arranged so that the concave and convex tip end surfaces 2006 are engaged with each other with a gap S between the ends of the floor slabs 2 facing each other.

The surface plate 20 extends in a direction orthogonal to the bridge axis direction, and is formed with an upper surface 2002 that is flush with the upper surface of the bridge pavement 3 formed on the upper surface of the floor slab 2 (the upper surface of the road bridge), It has a lower surface 2004 positioned oppositely and a concavo-convex tip surface 2006.
More specifically, as shown in FIG. 4A, the surface plate 20 has a substrate portion 26 extending in a direction orthogonal to the bridge axis, and a direction orthogonal to the bridge axis at a location where the substrate portions 26 face each other. V-shaped convex portions 28 and V-shaped concave portions 30 arranged alternately.
Accordingly, the concavo-convex tip surface 2006 is positioned at the tip end tip surface 2006A located at the tip of the V-shaped convex portion 28 and the side portion of the V-shaped convex portion 28, and on the side of the V-shaped concave portion 30. A side tip surface 2006B located at the bottom and a bottom tip surface 2006C located at the bottom end of the V-shaped recess 30.
The V-shaped convex portion 28 and the V-shaped concave portion 30 of the surface plate 20 of one joint member 14 form a gap S between the V-shaped concave portion 30 and the V-shaped convex portion 28 of the surface plate 20 of the other joint member 14. It is provided so that it may mesh in the open state, and the dimension of the gap S in the bridge axis direction increases or decreases according to the expansion and contraction of the floor slab 2 in the bridge axis direction.

As shown in FIG. 1, the side plate 22 is bent downward from the base end opposite to the distal end surface 2006 of the surface plate 20, and the side plate 22 extends over the entire length in the length direction of the surface plate 20. Is placed on the bottom surface of the recess 2A at the end of the floor slab 2.
The side plate 22 has an inner surface 2202 located on the gap S side and an outer surface 2204 located on the opposite side, and an anchor member 24 projects from the outer surface 2204.
The post-cast concrete 13 is placed between the outer surface 2204 and the recess 2 </ b> A, and the joint member 14 is fixed to the end of the floor slab 2 via the anchor member 24 and the post-cast concrete 13.

The water stop member 16 prevents the rain water entering from the gap S from flowing downward during the rain or the like, and the water stop member 16 has a width along the bridge axis direction.
The water stop member 16 is disposed below the joint member 14, extends in a direction orthogonal to the bridge axis direction, is elastically deformable in the bridge axis direction, and is made of a conventionally known elastic material. As such an elastic material, various conventionally known rubbers such as CR rubber (chloroprene rubber) can be used.
The water stop member 16 includes a pair of base portions 1602 and a bellows portion 1604.

The pair of base portions 1602 are positioned at both ends in the width direction of the water blocking member 16, and the outer surfaces of the pair of base portions 1602 are respectively attached to the inner surfaces 2202 of the corresponding side plates 22 by vulcanization adhesion.
The bellows portion 1604 connects the pair of base portions 1602, and as shown in FIG. 2B, the bellows portion 1604 has the smallest and smallest gap between the front end surfaces in the bridge axis direction. It is formed in a curved shape convex downward in an intermediate state.
In the present embodiment, the bellows portion 1604 will be described with respect to the case where one downward curved shape is provided, but a plurality of downward curved shapes may be arranged in the bridge axis direction. The structure is arbitrary.
As shown in FIGS. 2A to 2C, in the present embodiment, the bottom of the curved shape of the bellows portion 1604 is a water-stop member that is displaced in the vertical direction by increasing / decreasing the gap between the front end surfaces in the bridge axis direction. 16 vertical displacement portions 16A.

When the concavo-convex gap in the bridge axis direction becomes large, the stuffing member 32 closes a part of the concavo-convex gap so that the motorcycle can run smoothly.
The padding member 32 is made of a conventionally known elastic material that does not deform greatly when a load is applied to the motorcycle, and similarly to the water stop member 16, various conventionally known rubbers such as CR rubber (chloroprene rubber) are used. Is possible.
In the present embodiment, the filling member 32 is formed integrally with the water stop member 16.
The padding member 32 is provided at a position of the vertical displacement portion 16A located below the uneven gap, and as shown in FIGS. 2A and 3A, the uneven gap S in the bridge axis direction is provided. Is located below the concave-convex gap S when it becomes smaller, and as shown in FIGS. 2 (B), (C), 3 (B), (C), the concave-convex in the bridge axis direction When the gap S becomes larger, it rises and is located in the irregular gap S.
Further, as shown in FIGS. 2 (C) and 3 (C), the interstitial member 32 is larger than the upper surface 2002 of the surface plate 20 in a state where the uneven gap S in the bridge axis direction is the largest and most elevated. Also, it is located at a low location, and is designed so that wear does not occur as the vehicle travels.
As shown in FIGS. 1, 3, and 5, the filling member 32 includes a leg portion 3202 that stands up from the up-and-down displacement portion 16 </ b> A, and a filling body that moves forward and backward in an uneven gap S provided at the upper end of the leg portion 3202. 3204.
In the present embodiment, the leg 3202 has a circular cross section and has a cylindrical shape.

The filling main body 3204 has a cross section cut along a horizontal plane with a larger contour than the leg 3202.
In the present embodiment, as shown in FIGS. 4A to 4C, the padding main body 3204 is formed between the adjacent side portions of the two adjacent V-shaped convex portions 28 of the pair of joint members 14 ( It is provided so as to advance and retreat in the gap between the side end surface 2006B.
The plan view shape of the padding main body 3204 is elongated along the extending direction of the gap between the side portions facing each other of the V-shaped convex portion 28 where the padding main body 3204 advances and retreats.
As shown in FIG. 5, both sides of the padding main body 3204 facing the side tip surface 2006B that forms a gap between the sides facing each other (between the side tip surfaces 2006B) of the V-shaped convex portion 28, It is formed with inclined surfaces 3206 that approach each other as it reaches the upper end.
Therefore, as shown in FIGS. 3A to 3C, the cross section cut along a plane orthogonal to the extending direction of the padding main body 3204 has a trapezoidal shape.

Next, the movement of the narrowing structure for the road bridge expansion and contraction device will be described.
As shown in FIGS. 2 (A), 3 (A), and 4 (A), in the state where the gap S is the smallest, the vertical displacement portion 16A is located at the lowest position, and along with this, the space is reduced. The main body 3204 is also positioned at the lowest position, and the padding main body 3204 is located at a position separated below the gap between the side portions of the V-shaped convex portion 28 facing each other (between the side end surface 2006B).
As the gap S increases from the state of FIGS. 2A, 3A, and 4A, the up-and-down displacement portion 16A rises, and the interposing member 32 also rises accordingly.
As shown in FIG. 2B, FIG. 3B, and FIG. 4B, in the intermediate state between the state in which the gap S is the smallest and the state in which the gap S is the largest, the padding main body 3204 is V The character-shaped convex portion 28 advances to the lower portion of the gap between the side portions facing each other (between the side tip surfaces 2006B) and closes a part of the gap.
As the gap S increases from the state of FIGS. 2B, 3B, and 4B, the up-and-down displacement portion 16A rises, and the interposing member 32 also rises accordingly.
Eventually, as shown in FIGS. 2 (C), 3 (C), and 4 (C), in the state in which the gap S is the largest, the vertical displacement portion 16A becomes the position displaced most upward, and accordingly The padding main body 3204 is also positioned at the uppermost position, and is positioned at the upper part of the gap between the opposing side portions of the V-shaped convex portion 28 (between the side end surface 2006B) and closes a part of the gap.

According to the present embodiment, when the dimension of the gap S in the bridge axis direction is small and the gap member 32 is not necessary, the gap member 32 is positioned at a position away from the gap S, and the gap S is When it is desirable to increase and block a part of the gap S, that is, when the gap member 32 is necessary, the gap member 32 can be arranged in the uneven gap S.
Therefore, it is possible to provide a narrowing structure for a road bridge telescopic device that is excellent in durability by reducing wear of the narrowing member 32 accompanying traveling of the vehicle while ensuring smooth traveling of the motorcycle.
In addition, the stuffing member 32 is moved up and down by using the bellows portion 1604 of the water stop member 16, and the stuffing main body 3204 is advanced into the clearance S, and is retracted from the clearance S. Therefore, another member such as an actuator is provided. Therefore, it is possible to achieve the above-described effects while suppressing an increase in the number of parts and suppressing an increase in weight.

In addition, since the cross-section body 3204 has a cross section cut by a horizontal plane and is formed with a larger contour than the leg 3202, when the inter-space main body 3204 is positioned in the gap S, a part of the gap S is made larger. It can be closed by the contour filling main body 3204, which is advantageous for smooth running of the motorcycle.
Moreover, the planar view shape of the padding main body 3204 is along the extending direction of the gap S between the side portions facing each other (between the side tip surfaces 2006B) of the V-shaped convex portion 28 where the padding main body 3204 advances and retreats. Since the narrow body 3204 is positioned in the gap S, a part of the gap S can be blocked by the narrow body 3204 having a larger contour, so that the motorcycle can run smoothly. It will be advantageous.
Further, both side portions of the padding main body 3204 facing the front end surface 2006 forming the gap S between the side portions facing each other (between the side end front end surfaces 2006B) of the V-shaped convex portion 28 approach each other as reaching the upper end. Since it is formed by the inclined surface 3206, it is advantageous in preventing interference with the side end surface 2006B when the interim body 3204 advances into and exits from the gap S, and the interspace between the interspaced body 3204 and the interspace S It is advantageous for smooth advance and retreat.

In the embodiment, the case where the interspace member 32 is formed integrally with the water stop member 16 has been described. However, the interspace member 32 and the water stop member 16 are formed as separate members, and the interspace member 32 is added. Although it may be attached to the water stop member 16 by sulfur bonding, bonding with an adhesive, attachment using a bolt, etc., it is advantageous to reduce costs if it is integrally formed as in the embodiment.
Further, the place where the interposing member 32 is disposed is not limited to the gap S between the side portions of the V-shaped convex portion 28 facing each other (between the side end surface 2006B). For example, the bottom portion of the V-shaped concave portion 30 It is arbitrary such as placing it on.
In the present embodiment, the accordion portion 1604 has been described as having one downward curved shape. However, the accordion portion 1604 is provided with a plurality of downward curved shapes arranged in the bridge axis direction. If there is a plurality of vertical displacement portions 16A, there are a plurality of vertical displacement portions 16A. Therefore, it is optional to support the padding main body 3204 with a plurality of legs 3202 standing from the bottom of each curved shape.
The shape of the padding main body 3204 is not limited to the rectangular shape in plan view as in the embodiment, and is depending on the shape of the gap S in which the padding main body 3204 is arranged, such as a circular shape in plan view, an ellipse, or a triangle. It is appropriately modified.

4 joint portion 10 road bridge expansion / contraction device 14 joint member 16 water stop member 1602 base portion 1604 bellows portion 16A vertical displacement portion 20 surface plate 2006 tip surface 28 V-shaped convex portion 32 padding member 3202 leg portion 3204 padding main body 3206 inclined surface S clearance

Claims (7)

A seam portion of the road bridge is formed together with opposite ends of elements constituting the road bridge having a pair of face plates facing each other,
A water stop member is provided that can extend and contract in the direction of the bridge axis and connects between the opposite ends below the surface plate,
It is a road bridge expansion / contraction device padding structure in which a padding member is disposed so as to block a part of the uneven gap extending in the direction intersecting the bridge axis direction between the front end surfaces of the pair of surface plates. ,
The water stop member has a vertical displacement portion that is displaced downward when the dimension in the bridge axis direction of the uneven gap is reduced, and is displaced upward when the dimension is increased,
The interstitial member is provided at a position of the up-and-down displacement portion corresponding to the lower part of the uneven gap, and is located at a place away from the uneven gap when the dimension is reduced, When the concavo-convex gap becomes large, it rises and is located in the concavo-convex gap,
A narrowing structure for a road bridge telescopic device characterized by that. The padding member includes a leg portion that stands up from the vertical displacement portion, and a padding main body that is provided at an upper end of the leg portion and advances and retracts into the uneven gap.
The space-filling structure for a road bridge expansion / contraction device according to claim 1. Both side portions of the padding main body facing the tip surface forming the uneven gap are formed with inclined surfaces that approach each other toward the upper end.
The space filling structure for a road bridge expansion and contraction device according to claim 2. The plan view shape of the padding main body is formed in an elongated shape along the extending direction of the uneven gap in which the padding main body advances and retreats.
4. The interlining structure for a road bridge expansion / contraction device according to claim 2 or 3. The pair of surface plates have a plurality of V-shaped convex portions that are alternately arranged in a direction intersecting the bridge axis direction and constitute the uneven gap,
The padding member is provided so as to advance and retreat into the gap between the side portions of the two adjacent V-shaped convex portions facing each other.
The space-filling structure for a road bridge expansion and contraction device according to any one of claims 1 to 4, wherein The water-stop member has a base portion attached to the opposite end portions, and a bellows portion connecting the base portions,
The vertical displacement part is the bellows part,
The space-filling structure for a road bridge expansion / contraction device according to any one of claims 1 to 5. The padding member is formed integrally with the water stop member,
A narrowing structure for a road bridge expansion / contraction device according to any one of claims 1 to 6.

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