JP7017206B2 - Filling material for expansion and contraction devices for bridges - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Law 1. Bridge Maintenance Co., Ltd. distributed a leaflet about the filling material according to the present invention to the person in charge of Nippon PS Co., Ltd. at the Nihon PS Hishinobashi site office on November 7, 2017. I explained the contents. 2. 2. Bridge Maintenance Co., Ltd. distributed a leaflet about the filling material according to the present invention to the person in charge of East Japan Concrete Co., Ltd. at the Kesen Ohashi site office of East Japan Concrete Co., Ltd. on December 12, 2017. I explained the contents. 3. 3. Bridge Maintenance Co., Ltd., on March 9, 2018, at the Bridge Maintenance Minamisagi Factory, in the presence of the person in charge of East Japan Concrete Co., Ltd. and the person in charge of Nonagase Co., Ltd. Was inspected for assembly on the road joint and made public.

The present invention relates to a packing material for a telescopic device for a bridge.

A stretch device for bridges is used between the joints of the decks of road bridges in order to cope with bending due to the load of vehicles and expansion and contraction due to temperature changes.
In the expansion / contraction device for bridges, for example, a pair of substantially triangular comb teeth are meshed with each other to change the gap, thereby allowing expansion / contraction in the direction of the bridge axis and ensuring the running performance of a vehicle or the like (Patent Documents). 1).
On the other hand, in recent years, the number of scenes in which a bicycle travels on a bridge expansion / contraction device on a roadway has increased, and it is necessary to enable the bicycle to safely travel in the gap of the bridge expansion / contraction device.

As a filling material for filling the gaps in the expansion / contraction device for bridges, there is a method of filling the gaps at the time of maximum extension with resin.
There is also a method of using a filling material having a low reaction force such as a sponge.
Further, in Patent Document 2, a bellows-shaped compensating member that expands and contracts in the longitudinal direction is formed by an elastic body, is arranged between the tip and the bottom of the comb tooth portion of the extension / contraction device for a bridge, and both ends are attached with bolts. There is something like that.

Japanese Unexamined Patent Publication No. 2004-143845 Jitsufuku No. 3-32565 Gazette

In the construction method in which resin is filled as a filling material for the expansion and contraction device for bridges, when the gap shrinks, a large reaction force is applied to the expansion and contraction device for bridges via the resin, and the expansion and contraction device for bridges itself is damaged or the resin is removed from the surface. There are problems such as jumping out and hindering the running of bicycles.
Further, when a low reaction force padding material such as a sponge is used, although a large reaction force is not generated, there is a problem that the strength is low and the followability to the expansion / contraction change is poor.
Further, the supplement member of Patent Document 2 has a problem that it takes a long time to construct because it is necessary to fix the tip and the valley portion of the comb tooth portion with bolts in order to install it in the expansion / contraction device for a bridge.

INDUSTRIAL APPLICABILITY The present invention has been made in view of the above-mentioned problems of the prior art. The purpose is to provide a padding material.

In order to achieve the above object, the filling material for the expansion / contraction device for bridges according to the present invention is
The pair of comb teeth are engaged with each other and are arranged in a gap formed around the comb teeth that change with the expansion and contraction of the expansion / contraction device for a bridge that allows expansion and contraction in the direction of the bridge axis, and are formed of an elastic member. It is a filling material for expansion and contraction devices for bridges.
A main body portion disposed between the peak portion of the comb tooth portion and the valley portion of the comb tooth portion facing the peak portion, and a main body portion.
It is provided with an end connecting portion that connects the adjacent main body portions at the mountain portion and the valley portion.
The main body portion has a hollow cross-sectional shape and is formed so as to be disposable in the gap.
A bottom plate portion that closes the intermediate portion excluding both ends in the bridge axial direction is arranged between the adjacent main body portions.
It is characterized by that.

It is preferable that the bottom plate portion that closes between the main body portions is provided in the intermediate portion that does not interfere with the valley portion of the comb teeth portion due to the proximity of the comb teeth portions.

It is preferable that the main body portion and the end connecting portion are formed at a height that does not protrude from the surface of the comb tooth portion even by compression due to the proximity of the comb tooth portions.

It is preferable that the end connecting portion is formed with a deformation adjusting portion for adjusting the compression deformation allowance due to the proximity of the comb teeth to each other, and the deformation adjusting portion is formed with a notch and a notch formed in the end connecting portion. / Or preferably composed of adjusting holes.

It is preferable that the filling material has a planar shape of each tooth portion of the comb tooth portion having a substantially triangular shape, a substantially trapezoidal shape, or a substantially elliptical arc shape.

The padding material preferably has a sliding material integrally or separately on the lower surface of the bottom plate portion, and the lower surface of the bottom plate portion may be formed in an uneven shape.

According to the present invention, the shrinkage of the gap does not generate a large reaction force or jumps out to the surface, and it is possible to make the workability excellent in followability to expansion and contraction and workability.

According to an embodiment of the packing material of the expansion / contraction device for a bridge of the present invention, (a) is an external perspective view, and (b) is an external perspective view of the back surface. It is a partially enlarged perspective view which concerns on one Embodiment of this invention. According to an embodiment of the present invention, (a) is a plan view and (b) is a front view. According to an embodiment of the present invention, (a) is a sectional view taken along the line AA in FIG. 3 (a), (b) is a sectional view taken along the line BB in FIG. 4 (a), and FIG. It is a cross-sectional view of CC in (a). According to one embodiment of the present invention, (a) is a front view of a telescopic device for a bridge, and (b) is a plan view. According to one embodiment of the present invention, (a) is a plan view in an approaching state, and (b) is a plan view in a separated state. The state of one side of the expansion / contraction device for a bridge and the packing material according to the embodiment of the present invention is schematically shown, (a) is the maximum separated state, (b) is the standard time state, and (c) is. It is explanatory drawing which shows the minimum approach state respectively. It is explanatory drawing which shows typically the state of the packing material which concerns on one Embodiment of this invention, (a) is the state at the time time, and (b) shows the minimum approach state.

Hereinafter, embodiments of the packing material for the expansion / contraction device for bridges of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 5, for example, the packing material 10 of the expansion / contraction device for a bridge of the present invention meshes the pair of comb tooth portions 2 and 2 of the expansion / contraction device for a bridge 1 with each other in the direction of the bridge axis (left-right direction on the paper surface). It is arranged in the zigzag gap 3 formed around the comb tooth portions 2 and 2 that changes with the expansion and contraction, and fills the gap 3 by following the change of the zigzag gap 3. It is made of elastic members such as natural rubber, synthetic rubber and resin.

In the expansion / contraction device 1 for a bridge, each tooth portion of the comb tooth portion 2 is formed in a substantially triangular shape in a planar shape, and the mountain portion 2a at the tip and the valley portion 2b at the base end face each other with a predetermined interval. It is placed at the joint of the floor slab. A water blocking material support portion 4 is provided below the comb tooth portion 2 in parallel with the comb tooth portion 2. The water blocking material 5 is installed on the water blocking material support portions 4 and 4 so as to close the lower side of the pair of comb tooth portions 2 and 2.
Therefore, in this expansion / contraction device for bridges 1, a pair of comb tooth portions 2 and 2 so as to mesh the peak portion 2a and the valley portion 2b at the tips of the tooth portions 2 and 2 constituting the face plate. Is attached to the floor slab, so that the running performance of the vehicle can be ensured even if the gap 3 between the comb tooth portions 2 and 2 changes due to expansion and contraction in the direction of the bridge axis. Further, by installing the filling material 10 described later in the gap 3 between the comb tooth portions 2 and 2 of the bridge expansion / contraction device 1, the running performance of a vehicle such as a bicycle can be ensured.
Further, for rainwater and the like, water stoppage is ensured by the water stop material 5 installed on the water stop material support portion 4.
The shape (planar shape) of each tooth portion of the comb tooth portion 2 is not limited to a substantially triangular shape, and may be another shape such as a substantially trapezoidal shape or a substantially elliptical arc shape, and a pair of comb tooth portions. When the two are engaged with each other and expanded and contracted in the direction of the bridge axis, a gap 3 such as a zigzag or a wavy shape is formed around the comb tooth portion 2, and the gap 3 may have a shape that changes with substantially the same width.

As shown in FIG. 1, the packing material 10 is arranged so as to close the zigzag gap 3 formed around the pair of comb tooth portions 2 and 2 of the bridge expansion / contraction device 1.
The filling material 10 forms a straight portion of a zigzag gap 3 between the mountain portion 2a at the tip of the tooth portion of the comb tooth portion 2 and the valley portion 2b at the base end of the comb tooth portion 2 facing the peak portion 2a. A portion 20 and an end connecting portion 30 for connecting two main body portions 20 arranged in an adjacent V shape to each other at the peak portions 2a at the tip of the comb tooth portion 2 or between the valley portions 2b are provided. ing. Further, the main body portion 20 has a hollow cross-sectional shape and is formed so as to be disposable in the gap 3, and the bottom plate portion 40 that closes the intermediate portion excluding both ends in the bridge axial direction between the adjacent main body portions 20. Are arranged and configured. That is, the bottom plate portion 40 is provided only in the intermediate portion excluding both end portions, not as a whole in the bridge axis direction of the packing material 10, and is formed so as to close the lower end between the main body portions 20.

The main body portion 20 is provided with side wall portions 20a on both sides and is formed in a hollow shape having a substantially inverted U-shaped cross-sectional shape and an arch shape, and a groove-shaped opening 21 is formed at the bottom portion.
The main body 20 is provided with bottom plate portions 40 so as to close between the lower end of the side wall portion 20a on one side and the lower end of the side wall portion 20a on the other side of the adjacent main body portion 20, and both ends in the bridge axis direction. The bottom plate portion 40 is arranged in an intermediate portion excluding the portion.
That is, a bottom plate portion 40 is provided between the adjacent main body portions 20 so as to block only the intermediate portion in the bridge axis direction, and the main body portion 20 is upward from the bottom plate portion 40 formed in the intermediate portion excluding both end portions. , It is designed to protrude in a substantially inverted U shape. As a result, the bottom surface of the filling material 10 is in a state in which the space between the main body portions 20 is closed by the bottom plate portion 40, and the main body portion 20 is formed with a groove-shaped opening 21.
By forming the main body portion 20 in an arch shape, the filling material 10 secures the strength against a load from above and at the same time suppresses the reaction force due to the compression applied to the comb tooth portion 2.

The end connecting portion 30 is a portion that connects the mountain portions 2a at the tip of the main body 20 and the valley portions 2b at the base end at the ends. The end connecting portion 30 has a substantially V-shaped planar shape and the tip of the V-shaped valley portion is closed, and the two ends opposite to the valley portion are in an open state. Is formed in. The end connecting portion 30 has a hollow portion having a substantially V-shaped planar shape as a wall portion between the side wall portions 30a on both sides and the inner partition wall portion 30b, and has a substantially inverted U-shaped cross-sectional shape and an arch shape on both sides. Two hollow portions are formed, and the hollow portion is narrower toward the tip. Adjacent main body portions 20 are integrally connected to the two openings on the opposite side of the valley portion of the end connecting portion 30, and the hollow portions communicate with each other. Similar to the main body portion 20, the end connecting portion 30 has a substantially inverted U-shape and an arch shape protruding upward from the bottom plate portion 40. An opening 31 is formed in the bottom portion, and the opening 31 of the end connecting portion 30 is connected to the groove-shaped opening 21 by the main body portion 20. The openings 21 and 31 are narrower toward the tip and are in a state where the openings 21 and 31 communicate with each other.
As a result, the packing material 10 is formed in a zigzag shape having a substantially V-shape in a planar shape, both ends thereof are connected by the end connecting portion 30, and the intermediate portion of the end connecting portion 30 is the main body portion 20. The intermediate portion between the main body portions 20 except for both ends is connected by the bottom plate portion 40 and is closed.
By forming the cross-sectional shape of the end connecting portion 30 into an arch shape, it is possible to secure the strength against a load from above and at the same time suppress the reaction force due to the compression applied to the comb tooth portion 2 as in the main body portion 20. I am doing it.

The bottom plate portion 40 is continuously formed on the main body portion 20 so as to close an intermediate portion between adjacent main body portions 20 except for both ends in the bridge axial direction.
Both ends of the main body 20 are connected by end connecting portions 30, and the bottom plate portion 40 has a plate-like shape that closes the outer space of the zigzag in the middle portion excluding both ends in the bridge axial direction of the packing material 10. It is integrally formed with 20.
The bottom plate portion 40 is disposed below the comb tooth portion 2 and is attached so as to be laid on the upper surface of the water blocking material 5, and the main body portion 20 and the end connecting portion 30 are attached to the comb teeth of the bridge telescopic device 1. It is possible to position it in the gap 3 between the portions 2.
As a result, in the filling material 10, the main body portion 20 and the end connecting portion 30 are formed into an arch-shaped cross-sectional shape and protrude upward from the bottom plate portion 40 to be arranged in the zigzag gap 3, and the gap 3 is changed. It is possible to close it regardless. Further, the packing material 10 can be installed on the water blocking material 5 under the comb tooth portion 2 of the bridge expansion / contraction device 1 without fixing with bolts or the like.
Further, the bottom plate portion 40 prevents the filling material 10 itself from coming out from the gap 3 between the comb tooth portions 2.

The formation range of the bottom plate portion 40 of the packing material 10 is an intermediate portion excluding both ends in the bridge axis direction. It is provided in the middle part that does not interfere with 2b.
When the bottom plate portion 40 is installed in the extension / contraction device 1 for a bridge, the comb tooth portion 2 expands from the standard time state (see FIG. 7B) to the maximum separated state as schematically shown on one side in FIG. 7. Or (see FIG. (A)), while narrowing to the minimum approach state (see FIG. (C)), move on the bottom plate portion 40. When the comb tooth portion 2 moves on the bottom plate portion 40 and the gap 3 between the comb tooth portions 2 becomes narrow, there is a possibility that the bottom surface 2c of the comb tooth portion 2 and the bottom plate portion 40 of the packing material 10 come into contact with each other. (See FIGS. 5 and 6).
When the bottom surface 2c of the comb tooth portion 2 comes into contact with the upper surface of the bottom plate portion 40, the bottom plate portion 40 is held down by the waterproof material 5 (see FIG. 5), so that there is no escape and the upper side of the gap 3 (release side). ) (See FIGS. 5 and 6).
As schematically shown in FIG. 8, the upwardly displaced filling material 10 is sandwiched between the V-shaped side walls of the valley portion 2b of the comb tooth portion 2, and the sandwiched portion appears to be raised and sandwiched. Due to the resistance force caused by this, displacement in the direction of the bridge axis becomes impossible and a gap is formed at the bottom of the valley. As a result, a phenomenon occurs in which the gap at the tip (valley bottom) of the valley portion 2b of the comb tooth portion 2 appears to sink with respect to the raised portion.

Therefore, by forming the bottom plate portion 40 only in the intermediate portion excluding both ends in the bridge axis direction, it is possible to prevent interference with the comb tooth portion 2.
In particular, the comb tooth portion 2 has a bottom surface 2c formed in a tapered shape in which the plate thickness of the mountain portion 2a at the tip is thin and the plate thickness of the valley portion 2b at the base end is thick, so that friction with the padding material 10 is formed. If it interferes with a thick portion, it will not be possible to secure a smooth displacement of the filling material 10, but by forming the bottom plate portion 40 in the middle portion, it will be smooth. It is possible to secure a large displacement.

In such a packing material 10, the width (arch-shaped outer width) w and the height (arch-shaped outer height) h1 and h2 in the cross section of the main body portion 20 and the end connecting portion 30 are as follows. Is set to.
The width w of the main body portion 20 and the end connecting portion 30 corresponds to the distance between the side wall portions 20a or the distance between the side wall portions 30a, and is formed to have the same width w (see FIGS. 4 (b) and 4 (c)). ).
The width (distance between the mountain portion 2a at the tip and the valley portion 2b at the base end) W of the packing material 10 is the width between the comb tooth portion 2 of the expansion / contraction device 1 for the bridge and the comb tooth portion 2 in a state where the comb tooth portions 2 are separated from each other. The width W2 is set so that even if a gap 3a is formed between the material 10 and the material 10, the width W2 can be traveled without any problem even if a vehicle such as a bicycle travels on the expansion / contraction device 1 for a bridge (see FIG. 6B). In addition, W1 is the width in the state where the comb tooth portion 2 is close to each other.
The arch-shaped height of the packing material 10 is formed so that the main body portion 20 is as high as h1 and the end connecting portion 30 is formed as slightly lower as h2 (see FIG. 4A). The heights h1 and h2 of the packing material 10 protrude from the surface of the comb tooth portions 2 even when the comb tooth portions 2 of the bridge expansion / contraction device 1 are close to each other and compressed (see FIG. 6A). It is set so that there is no. At the same time, even when the comb teeth 2 are separated (see FIG. 6 (b)), the height h2 can be reached without any problem even if a vehicle such as a bicycle runs on the comb teeth 2 of the bridge telescopic device 1. It has been set.

In this packing material 10, since the end connecting portion 30 includes the side wall portions 30a on both sides and the intermediate partition wall portion 30b, the case where the packing material 10 is compressed as compared with the case where only the side wall portions 20a on both sides of the main body portion 20 are provided. The rigidity is high. Therefore, the end connecting portion 30 is provided with a deformation adjusting portion 50 for adjusting the compression deformation allowance.
As shown in FIG. 2, the deformation adjusting portion 50 has a bottomed adjusting hole 51 formed from the upper surface to the lower surface of the partition wall portion 30b, one end communicating with the adjusting hole 51, and the other end having a V shape. It is composed of a notch 52 that opens on the opening side of the above.
The rigidity of the partition wall portion 30b can be changed depending on the size and depth of the adjusting holes 51, or the width and depth of the notch 52, and the deformation allowance of the end connecting portion 30 can be adjusted.
That is, in a state where the comb tooth portions 2 of the bridge expansion / contraction device 1 are close to each other and the end connecting portion 30 is compressed, the comb tooth portions 2 are compressed so as not to pop out on the surface of the comb tooth portion 2. The deformation allowance is adjusted so that the reaction force due to the force is not hindered in the structure of the comb tooth portion 2.
The deformation adjusting portion 50 provided in the end connecting portion 30 is not always required for the packing material 10, and may be appropriately adopted depending on the usage conditions of the bridge expansion / contraction device 1.

The filling material 10 of the expansion / contraction device for bridges configured in this way has a state in which the gap 3 between the comb tooth portions 2 of the expansion / contraction device 1 for bridges is widened to the maximum, and is attached to the water blocking material support portion 4. Attach it so that it is laid on the upper surface of the water material 5.
As a result, it is not necessary to attach or bond with bolts, it can be easily installed, and workability can be ensured.
On the other hand, even if the distance between the comb teeth 2 of the bridge expansion / contraction device 1 becomes narrow due to expansion and contraction, the filling material 10 follows and deforms, and the filling material 10 does not protrude to the surface, and the distance between the comb teeth 2 Even if the filling material 10 becomes wider, the filling material 10 is deformed so as to follow and return to the original position, and even if a gap 3a is formed between the filling material 10 and one of the comb teeth portions 2, even if a gap 3a is formed, the vehicle such as a bicycle It is designed so that the running is not hindered, and the followability can be ensured.
Further, in the packing material 10, by forming the bottom plate portion 40 only in the intermediate portion excluding both ends in the bridge axis direction, it is possible to prevent interference with the comb tooth portion 2.
That is, the comb tooth portion 2 has a tapered shape (vertical direction) in which the plate thickness (vertical plate thickness) of the mountain portion 2a at the tip of the bottom surface 2c is thin and the plate thickness of the valley portion 2b at the base end is thickened. By forming it in a tapered shape), the friction with the filling material 10 may be reduced, and if it interferes with the thick portion, the smooth displacement of the filling material 10 is ensured. However, by forming the bottom plate portion 40 in the intermediate portion, smooth displacement and a deformed state are ensured.
If the filling material 10 slides on the water blocking material 5, the gap 3a is dispersed on both sides of the filling material 10 due to the expansion and contraction of the comb teeth portion 2, and becomes smaller, further increasing the size of the vehicle such as a bicycle. It will not hinder driving.

Next, in such a filling material 10, if the filling material 10 moves so as to slide on the water blocking material 5, the followability to the expansion and contraction of the comb tooth portion 2 of the bridge expansion / contraction device 1 is improved, and the interval is improved. The gaps 3 are dispersed on both sides of the packing material 10, and the running performance of a vehicle such as an automobile or a bicycle is improved.
Therefore, it is preferable to add a sliding material integrally or separately on the lower surface of the bottom plate portion 40 of the packing material 10 or to provide an uneven shape to form a mesh structure.
As the sliding material, for example, a low-friction resin sheet is attached or stacked by adhesive.
As the uneven shape, a large number of spherical protrusions may be provided, a semicircular protrusion may be provided, or a mesh structure may be used.

As described in detail with the above embodiments, according to the packing material 10 of the expansion / contraction device for bridges of the present invention, the pair of comb tooth portions 2 are engaged with each other to allow expansion / contraction in the bridge axial direction. It is a filling material 10 for a bridge telescopic device 1 arranged in a gap 3 formed around a comb tooth portion 2 that changes with expansion and contraction of the telescopic device 1 and is formed of an elastic member, and is a filling material 10 of the comb tooth portion 2. The main body portion 20 disposed between the mountain portion 2a and the valley portion 2b of the comb tooth portion 2 facing the mountain portion 2a, and the end connecting portion connecting the adjacent main body portions 20 with the mountain portion 2a and the valley portion 2b. The main body portion 20 has a hollow cross-sectional shape and is formed so as to be disposable in the gap 3, and an intermediate portion excluding both ends in the bridge axial direction is provided between the adjacent main body portions 20. Since the bottom plate portion 40 for closing is arranged, a large reaction force is not generated due to the contraction of the gap 3, and the bottom plate portion 40 does not pop out to the surface, so that it can be made excellent in followability to expansion and contraction and workability. Further, since the packing material 10 is provided with a bottom plate portion 40 at an intermediate portion excluding both ends in the bridge axis direction, it is possible to prevent the comb tooth portion 2 and the bottom plate portion 40 from interfering with each other and close the gap 3. can.
Further, the packing material 10 can be prevented from coming off and can be maintained in a state of being installed in the bridge expansion / contraction device 1 without the need for bolts or adhesive treatment.

Further, in the packing material 10 of the expansion / contraction device for bridges, the bottom plate portion 40 that closes between the main body portions 20 is provided in the intermediate portion that does not interfere with the valley portion 2b of the comb tooth portions 2 due to the proximity of the comb tooth portions 2 to each other. Therefore, even if the comb tooth portions 2 approach each other, it is possible to prevent the comb tooth portions 2 and the bottom plate portion 40 from interfering with each other, and it is possible to close the gap 3 between the comb tooth portions 2 without creating a gap or protruding upward. can. This makes it possible to ensure the running safety of vehicles such as automobiles and bicycles.

Further, in the packing material 10 of the expansion / contraction device for bridges, the main body portion 20 and the end connecting portion 30 are formed at a height that does not protrude from the surface of the comb tooth portions 2 even by compression due to the proximity of the comb tooth portions 2 to each other. Therefore, it is possible to ensure the running safety of vehicles such as automobiles and bicycles.

Further, in the filling material 10 of the expansion / contraction device for bridges, the end connecting portion 30 is formed with a deformation adjusting portion 50 for adjusting the compression deformation allowance due to the proximity of the comb tooth portions 2, so that the comb tooth portion 2 is formed. Even if it is compressed by, the reaction force due to deformation can be further reduced.

Further, in the filling material 10 of the expansion / contraction device for bridges, the deformation adjusting portion 50 is composed of a notch 52 and / or an adjusting hole 51 formed in the end connecting portion 30, so that the notch 52 and the adjusting hole 51 are used. The deformation allowance can be easily adjusted.

Further, in the filling material 10 of the expansion / contraction device for bridges, since the planar shape of each tooth portion of the comb tooth portion 2 is formed of any of a substantially triangular shape, a substantially trapezoidal shape, and a substantially elliptical arc shape, each tooth portion. The filling material 10 can be arranged in the gap 3 around the.

Further, in the filling material 10 of the expansion / contraction device for bridges, since the sliding material is integrally or separately provided on the lower surface of the bottom plate portion 40, the filling material 10 can be slid on the surface of the water blocking material 5 and expanded / contracted. It is possible to further improve the followability associated with this.

Further, in the packing material 10 of the expansion / contraction device for bridges, the lower surface of the bottom plate portion 40 is formed in an uneven shape, so that the followability associated with expansion and contraction can be improved by this uneven shape as well.

In the above embodiment, the case where the packing material 10 is installed in the zigzag gap 3 of the bridge expansion / contraction device 1 has been described as an example, but when the shape of the gap 3 differs depending on the shape of the comb tooth portion 2. May be installed by forming the shape of the filling material 10 into a shape corresponding to the gap 3.

1 Telescopic device for bridges 2 Comb teeth 2a Mountains 2b Valleys 2c Bottom 3 Gap 3a Gap 4 Water stop material support 5 Water stop material 10 Stuff material 20 Main body 20a Side wall 21 Opening 30 End connection 30a Side wall part 30b Partition wall part 31 Opening part 40 Bottom plate part 50 Deformation adjustment part 51 Adjustment hole 52 Notch

Claims (8)

The pair of comb teeth are engaged with each other and are arranged in a gap formed around the comb teeth that change with the expansion and contraction of the expansion / contraction device for a bridge that allows expansion and contraction in the direction of the bridge axis, and are formed of an elastic member. It is a filling material for expansion and contraction devices for bridges.
A main body portion disposed between the peak portion of the comb tooth portion and the valley portion of the comb tooth portion facing the peak portion, and a main body portion.
It is provided with an end connecting portion that connects the adjacent main body portions at the mountain portion and the valley portion.
The main body portion has a hollow cross-sectional shape and is formed so as to be disposable in the gap.
A bottom plate portion that closes the intermediate portion excluding both ends in the bridge axial direction is arranged between the adjacent main body portions.
A filling material for bridge expansion and contraction devices, which is characterized by this. The bottom plate portion that closes between the main body portions is provided in the intermediate portion that does not interfere with the valley portion of the comb teeth portion due to the proximity of the comb teeth portions.
The filling material for a telescopic device for a bridge according to claim 1. The main body portion and the end connecting portion are formed at a height that does not protrude from the surface of the comb teeth portion even by compression due to the proximity of the comb teeth portions.
The filling material for a telescopic device for a bridge according to claim 1 or 2, wherein the material is used. A deformation adjusting portion for adjusting the compression deformation allowance due to the proximity of the comb teeth portions is formed in the end connecting portion.
The filling material for a telescopic device for a bridge according to any one of claims 1 to 3. The deformation adjusting portion is composed of a notch and / or an adjusting hole formed in the end connecting portion.
The filling material for a telescopic device for a bridge according to claim 4. In the packing material, the planar shape of each tooth portion of the comb tooth portion is formed of any of a substantially triangular shape, a substantially trapezoidal shape, and a substantially elliptical arc shape.
The filling material for a telescopic device for a bridge according to any one of claims 1 to 5. The padding material is provided with a sliding material integrally or separately on the lower surface of the bottom plate portion.
The filling material for a telescopic device for a bridge according to any one of claims 1 to 6, characterized in that. In the padding material, the lower surface of the bottom plate portion is formed in an uneven shape.
The filling material for a telescopic device for a bridge according to any one of claims 1 to 7.

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