JP2001090013A - Expansion device for bridge joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an expansion device for a bridge joint capable of preventing noise that occurs when a vehicle is traveling on a bridge joint. SOLUTION: An expansion device 1 of a bridge joint is provided on a plurality of fixed fingers 2 located at predetermined intervals in directions perpendicular to the bridge axis and on a surface at the tip portion of the one of bridge girder end portions Ba on one of the bridge girder end portion Ba among the bridge girder end portions facing each other, and also its surface is equipped with a receiving base 3 on which a slide member 3A is attached, also the tip portion is placed on the receiving base 3 o the other bridge girder end portion Bb, a plurality of moving fingers 4 are equipped at predetermined intervals in a direction perpendicular to the bridge axis in such a manner that they enter between a plurality of fixed fingers 2 and, at the upper and lower surfaces of the base end portions of these moving fingers 4, a vibration isolator 5 supporting the base end portion of the moving finger 4 to other bridge girder end portion Bb is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bridge joint expansion / contraction device which can prevent noise generated when a vehicle runs on a bridge joint.

[0002]

2. Description of the Related Art Conventionally, a bridge joint expansion / contraction device (hereinafter, referred to as a bridge joint) for coping with a displacement of expansion and contraction in a bridge axis direction at a bridge joint and following a height difference generated at an end of an opposite bridge girder.
The telescopic device is configured as shown in FIG.

In the telescopic device 30 shown in FIG. 3, a plurality of fixed fingers 32a are provided on one bridge girder end 31a at a predetermined interval in a direction orthogonal to the bridge axis, and the one bridge girder end 31a The moving finger 32a described later is
A receiving portion 33 on which the tip of the moving finger 32a is placed is provided, and a Teflon (trade name) plate 34 for preventing noise due to contact with the lower portion of the moving finger 32a is provided on the upper surface of the receiving portion 33.

[0004] Further, the extensible device 30 has its tip mounted on a Teflon (trade name) plate 34 and has a predetermined space in the direction perpendicular to the bridge axis so that the tip enters between the fixed fingers 32a. A plurality of moving fingers 32b are provided on the other bridge girder end 31b, and a projection 35 is formed below the base end of the moving finger 32b, and on a beam member 36 provided on the other bridge girder end 31b. The movable finger 32b is attached so as to be pushed vertically by a bolt 38 via an elastic member 37.

The telescopic device 30 having the above-described structure includes a so-called comb-like fixed finger 32a and a movable finger 32a.
In (b), the movable finger 32b moves between the fixed fingers 32a in the bridge axis direction, thereby allowing the one bridge girder end 31a and the other bridge girder end 31b to expand and contract in the bridge axis direction.

The telescopic device 30 includes a movable finger 3
With the protrusion 35 provided at the base end of the base 2b as a fulcrum, the moving finger 32b rotates in a vertical plane, thereby causing a height displacement between the bridge girder end 31a and the other bridge girder end 31b. Follow.

[0007]

However, in the above-mentioned conventional telescopic device, a projection is formed below the base end of the moving finger, and an elastic member is provided on a beam member provided on the other end of the bridge girder. By attaching the base end of the moving finger with a bolt to follow the displacement in the vertical plane, the protruding part is worn by repeated running of the vehicle and the bolt axial force due to the deterioration of the elastic member via the bolt And the mounting of the moving finger and the beam member is shaky, and as a result, there is a problem that the moving finger flaps during running of the vehicle and noise is generated.

In the above-mentioned conventional telescopic device, the movable finger slides on the receiving portion due to the telescopic displacement in the bridge axis direction at one bridge girder end and the other bridge girder end. (Trade name) The plate was severely worn, and the noise caused by the exposure of the receiving portion and contact with the moving finger was also a problem as described above.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a bridge joint expansion / contraction device which can prevent noise generated when a vehicle runs on the bridge joint.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method of manufacturing a vehicle, comprising: a plurality of fixed fingers provided in a comb shape on one end of a bridge girder; A receiving portion provided on the surface of the distal end portion of the end portion and having a sliding material attached to the surface, and the distal end portion is mounted on the receiving portion on the other bridge girder end portion, and a plurality of fixed fingers are provided. A plurality of moving fingers provided in a comb shape in a plan view so as to penetrate, and on the upper and lower surfaces of base ends of these moving fingers, seismic isolation is provided for supporting the base end of the moving finger to the other bridge girder end. The material was provided. With this configuration, the base end of the moving finger is supported on the other bridge girder end via the anti-vibration material, and therefore, noise accompanying displacement of the moving finger can be prevented.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
On one of the bridge girder ends facing each other, a plurality of fixed fingers provided at predetermined intervals in a direction orthogonal to the bridge axis, and provided on the tip end surface of the one bridge girder end. And a receiving part having a sliding member attached to the surface thereof, and a bridge is provided on the other end of the bridge girder so that its tip is placed on the receiving part and enters between the plurality of fixed fingers. A plurality of moving fingers provided at predetermined intervals in a direction perpendicular to the axis are provided, and the base ends of the moving fingers are supported on the upper and lower surfaces of the base ends of the moving fingers on the other bridge girder end. It is provided with earthquake-proof material.

According to the above construction, when the end of the bridge girder expands and contracts in the bridge axis direction, the moving fingers advance and retreat in the gap between the fixed fingers in the bridge axis direction to absorb the expansion and contraction displacement in the bridge axis direction. At this time, the moving finger slides on the receiving portion provided at the tip end of the other bridge girder end. However, since the sliding member is provided on the receiving portion, the sliding finger on the receiving portion of the moving finger is provided. Noise due to movement can be prevented.

When a height difference occurs between one bridge girder end and the other bridge girder end, the moving finger rotates in a vertical plane with the base end of the moving finger as a fulcrum,
The tip of the moving finger follows downward or upward by tilting.

At this time, the base end of the moving finger is sandwiched between the upper and lower surfaces by an anti-vibration material and is supported on the other bridge girder end via the anti-vibration material. Has no direct metal contact with the other bridge girder end, and therefore, even if the moving finger rotates in the vertical plane,
No noise is generated when the base end of the moving finger contacts the other bridge girder end.

Further, in the above-described expansion / contraction device for a bridge joint according to the present invention, if a predetermined number of moving fingers are integrated into a unit, the construction work is simplified.

In the above-described telescopic device for a bridge joint according to the present invention, if the anti-vibration material provided on the upper and lower surfaces of the moving finger is formed in an inverted V-shape in a side view, the anti-vibration material serves as a fulcrum and the moving finger has a fulcrum. The rotation in the vertical plane can be easily performed, and the noise prevention effect can be further enhanced.

Further, in the above-described expansion / contraction device for a bridge joint according to the present invention, when rubber laminated is used as the earthquake-proof material, the amount of deformation of the earthquake-proof material becomes large, and the displacement of the movable finger in the vertical plane is reduced. The rotation can be further absorbed, and the noise prevention effect can be further enhanced.

In the above-described telescopic device for a bridge joint according to the present invention, when urethane rubber is used instead of Teflon (trade name) as a sliding material attached to the surface of the receiving portion, Noise caused by abrasion of the sliding part due to sliding of the tip of the moving finger can be reliably suppressed.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an expansion and contraction device for a bridge joint according to the present invention will be described below with reference to FIGS. FIG.
1 shows a configuration of a telescopic device of a bridge joint according to the present invention. FIG. 2 is an enlarged view of a main part of a telescopic device for a bridge joint according to the present invention.

Reference numeral 1 denotes one end of a bridge girder Ba (hereinafter simply referred to as a bridge girder end Ba) and the other bridge girder end Bb.
This is a telescopic device (hereinafter, referred to as a telescopic device) of a bridge joint interposed between (hereinafter, simply referred to as a bridge girder end Bb), and is configured as follows.

Reference numeral 2 denotes a plurality of fixed fingers provided at predetermined intervals in a direction orthogonal to the bridge axis. These fixed fingers 2 are fixed on a mounting plate D mounted on the upper surface of the bridge girder end Ba. And a comb-like shape in plan view.

Reference numeral 3 denotes a pedestal (receiving portion) provided on the mounting plate D at the end of the bridge girder end Ba, for example, in a direction orthogonal to the bridge axis. A sliding member 3A made of urethane rubber is attached.

Reference numeral 4 denotes a movement in which the distal end enters between a plurality of fixed fingers 2 provided at the bridge girder end Ba, and the distal end is placed on the receiving base 3 via the sliding member 3A. A plurality of these moving fingers 4 are provided at predetermined intervals in a direction perpendicular to the bridge axis, and for example, as described later, a plurality of moving fingers 4 are integrated into a unit.

The base end of the moving finger 4 has an inverted V-shape in side view, for example, as shown in FIG. 2 (a), and a top 4a is formed on the upper surface and a recess 4b is formed on the lower surface. , The base end of the moving finger 4 is
And it is supported by the seismic material 5 (the seismic material 5A, the seismic material 5B) mentioned later arrange | positioned along the recess 4b so that upper and lower surfaces may be pinched.

The top 4a of the base end of the moving finger 4 is formed with a hole 4aa into which a projection P2 formed in a dent 5Ab of an anti-vibration material 5A described later fits. On the other hand, a recess 4Ab at the base end of the movable finger 4 is formed with a hole 4ba into which a projection P3 formed on a top 5Ba of an anti-seismic material 5B described later fits.

5 is provided so as to sandwich the upper and lower surfaces of the base end of the moving finger 4 and supports the base end of the moving finger 4 on the bridge girder end Bb so that the moving finger 4 rotates in a vertical plane. In this embodiment, for example, laminated rubber is used as the anti-seismic material 5.

Hereinafter, what is located on the upper surface of the base end of the moving finger 4 will be referred to as an anti-vibration material 5A,
The material located on the lower surface of the base end portion is referred to as the seismic material 5B, and the seismic material 5A and the seismic material 5B are collectively referred to as the seismic material 5.

As shown in FIG. 2 (a), the anti-vibration members 5A and 5B each have an inverted V-shape in side view following the base end of the moving finger 4, and have top portions 5Aa and 5Ba, respectively.
And depressions 5Ab and 5Bb are formed. And
The top 4a formed on the upper surface at the base end of the moving finger 4 fits into the depression 5Ab of the seismic insulator 5A, and the top 5Ba of the seismic material 5B fits into the depression 4b formed on the lower surface at the base end of the moving finger 4. I do.

On the top 5Aa of the earthquake-proof material 5A, there is formed a positioning projection P1 that fits into a hole 7aa formed in a depression 7a of the holding plate 7 described later. In addition, seismic isolation material 5A
A projection P2 that fits into a hole 4aa formed in the top 4a at the base end of the moving finger 4 is formed in the depression 5Ab.

On the other hand, a hole 4ba formed in the recess 4b of the moving finger 4 is provided at the top 5Ba of the vibration-proof material 5B.
Is formed. In addition, seismic material 5
B recess 5Bb has a projection P which fits into a hole 6b formed in a top member 6a mounted on an end cross beam 6 described later.
4 are formed.

Reference numeral 6 denotes an end cross beam provided on the bridge girder end Bb for supporting the moving finger 4 via the anti-vibration member 5. On the upper surface of the end cross beam 6, the recess 5B of the seismic isolation material 5B is formed so that the seismic isolation material 5B can be easily positioned.
The top member 6a that fits into the b is attached by a bolt T1.

The top member 6a is formed by a depression 5Bb of the seismic isolation material 5B.
2b, which penetrates vertically in the state shown in FIG.
A bolt T1 for attaching the top member 6a to the end cross beam 6 is inserted through the hole 6b. Further, the projection P4 formed in the depression 5Bb of the earthquake-proof material 5B is fitted into the hole 6b of the top member 6a as described above.

Numeral 7 denotes a pressing plate which is disposed above and opposed to the upper surface of the end cross beam 6 and which is attached to, for example, a column member 8 which will be described later provided on both sides of the end cross beam 6. As shown in FIG. 2, a depression 7a into which the top 5Aa of the above-described earthquake-proof material 5A fits is formed on the lower surface thereof.
The protrusion P at the top 5Aa of the seismic isolator 5A
A hole 7aa into which 1 is fitted is formed.

8 are column members provided at both ends of the end cross beam 6. The column member 8 is screwed with a bolt T2 from the upper surface of the holding plate 7, and is provided between the end cross beam 6 and the holding plate 7.
B, the moving finger 4 and the seismic material 5A are sandwiched, and a plurality of moving fingers 4 are unitized.

Accordingly, the base end of the moving finger 4 is supported on the bridge girder end Bb as follows. End beam 6
A top member 6a is mounted on the upper surface of the base member 6, and a projection P4 formed in a depression 5Bb of the earthquake-proof material 5B is fitted into a hole 6b of the top member 6a. The projection P3 formed on the top 5Ba of the earthquake-proof material 5B fits into a hole 4ba formed in the depression 4b of the moving finger 4.

Further, a projection P2 formed in the depression 5Ab of the seismic insulator 5A is fitted into a hole 4aa formed in the top 4a of the moving finger 4, and the projection P1 formed on the top 5Aa of the seismic insulator 5A is pressed. It is fitted in a hole 7aa formed in a depression 7a of the plate 7.

That is, the telescopic device 1 of the present invention comprises a top member 6a, an earthquake-proof material 5B,
The moving finger 4, the seismic isolation material 5A, and the holding plate 7
The positioning is performed by P4 and the layers are arranged in a stacked state. In this way, the displacement of the base end of the moving finger 4 due to the rotation of the moving finger 4 in the vertical plane can be allowed. It is.

Next, the operation of the telescopic device 1 having the above configuration will be described. When the bridge girder end Ba and the bridge girder end Bb expand and contract in the bridge axis direction, the moving finger 4 slides on the pedestal 3 and moves in the gap between the fixed fingers 2 in the bridge axis direction. I do.

The telescopic device 1 of the present invention absorbs telescopic displacement in the direction of the bridge axis in this manner, and the pedestal 3 has a conventional Teflon (trade name) in this embodiment.
Since the sliding member 3A made of, for example, urethane rubber is provided instead of, the noise caused by the wear of the receiving base 3 by the moving finger 4 can be suppressed.

When a height difference occurs between the bridge girder end Ba and the bridge girder end Bb, the base end of the moving finger 4 is used as a fulcrum.
The moving finger 4 rotates in the vertical plane, and the tip of the moving finger 4 tilts downward or upward.

The telescopic device 1 of the present invention follows the height difference between the bridge girder end Ba and the bridge girder end Bb in this manner, and the base end of the moving finger 4 is
In this embodiment, the upper and lower surfaces of the movable finger 4 are sandwiched between the seismic members 5A and 5B made of, for example, laminated rubber, and supported by the bridge girder end Bb via the seismic members 5. Is prevented from coming into contact with the end cross beam 6 and the holding plate 7 of the bridge girder end Bb to generate noise.

The present invention can be modified without being limited to the above-described embodiment. For example, in the above embodiment, the base end of the movable finger 4 and the anti-vibration material 5 are formed in an inverted V-shape, and the anti-vibration material 5 acts as a fulcrum of the mobile finger 4, so that the rotation in the vertical plane is facilitated. However, if the moving finger 4 rotates in a predetermined vertical plane, the vibration-proof material 5 may be formed in a flat plate shape.

In the above-described embodiment, the vibration-proof material 5 employs a laminated rubber to increase the amount of displacement absorption. However, the present invention is not limited to this. For example, a single-layer rubber may be used. However, a material other than rubber may be used as long as an earthquake-proof effect can be obtained.

Further, in the above embodiment, the receiving base 3 is fixedly provided on the mounting plate D mounted on the upper surface of the bridge girder end Ba, but, for example, is integrated with the upper surface of the bridge girder end Ba. May be formed.

[0045]

As described above, in the telescopic device for a bridge joint according to the first aspect of the present invention, the sliding plate is provided on the surface of the receiving portion of the moving finger provided on one end of the bridge girder, and the moving finger is provided. The base end of the moving finger is supported on the other bridge girder end via the seismic insulation, so that one bridge girder end and the other bridge girder end In this case, when a telescopic movement or a height difference occurs in the bridge axis direction, noise generated by the moving fingers responding to these displacements can be prevented.

Further, in the telescopic device for a bridge joint according to claim 2 of the present invention, in the above structure,
Since the predetermined number is integrated into a unit, the construction work is simplified.

Further, in the expansion / contraction device for a bridge joint according to claim 3 of the present invention, in any one of the above-described structures, the anti-vibration members provided on the upper and lower surfaces of the movable finger are formed in an inverted V-shape in side view. This anti-vibration material will act as a fulcrum, making it easy for the moving finger to rotate in the vertical plane,
Therefore, the noise prevention effect can be enhanced.

Further, in the expansion / contraction device for a bridge joint according to claim 4 of the present invention, in any one of the above-described structures, since the laminated rubber is used as the earthquake-proof material, the deformation amount of the earthquake-proof material is large. As a result, the noise prevention effect can be further enhanced.

According to a fifth aspect of the present invention, there is provided an expansion / contraction device for a bridge joint according to any one of the above-described structures, wherein urethane rubber is used for the sliding member attached to the surface of the receiving portion. Noise caused by sliding of the tip of the moving finger on the upper side can be reliably suppressed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a telescopic device of a bridge joint according to the present invention.

FIG. 2 shows the vicinity of the base end of a moving finger and the other end of a bridge girder in a telescopic device for a bridge joint according to the present invention, and (a).
FIG. 4 is a diagram showing a supporting portion of the moving finger, and FIG. 4B is a diagram showing a side portion of an end cross beam in which a plurality of moving fingers are unitized.

FIG. 3 is a diagram showing a schematic configuration of a conventional expansion / contraction device for a bridge joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Expansion / contraction device (bridge joint) 2 Fixed finger 3 Cradle (receiving part) 3A Sliding material 4 Moving finger 5 Seismic isolation material 6 End cross beam 7 Holding plate Ba (One) Bridge girder end Bb (Other) Bridge girder end

Claims (5)

[Claims] 1. An expansion / contraction device for a bridge seam interposed between opposed bridge girder ends, wherein a predetermined spacing is provided on one of the opposed bridge girder ends in a direction perpendicular to the bridge axis. A plurality of fixed fingers, and a receiving part provided on the tip end surface of the one end of the bridge girder and having a sliding member attached to the surface thereof, and provided on the other end of the bridge girder. Is provided with a plurality of moving fingers, the tip of which is mounted on the receiving portion, and provided at predetermined intervals in a direction orthogonal to the bridge axis so as to enter between the plurality of fixed fingers. An expansion / contraction device for a bridge joint, wherein a shock-absorbing material is provided on upper and lower surfaces of the base end of the moving finger to support the base end of the moving finger on the end of the other bridge girder. 2. The expansion / contraction device according to claim 1, wherein a predetermined number of moving fingers are unitized. 3. The expansion / contraction device for a bridge joint according to claim 1, wherein the anti-vibration members provided on the upper and lower surfaces of the movable finger are formed in an inverted V-shape in a side view. 4. The expansion / contraction device for a bridge joint according to claim 1, wherein laminated rubber is used as the earthquake-proof material. 5. A sliding member attached to a surface of a receiving portion,
5. An urethane rubber is used.
The telescopic device for a bridge joint according to any one of the above.