JP2019190008A - Filling material of bridge expansion device - Google Patents

Abstract

To provide a filling material of a bridge expansion device which is excellent in followability and workability with respect to expansion and contraction without generating high reaction force or projecting toward the surface by contraction of a gap.SOLUTION: A filling material 10 of a bridge expansion device is arranged in a gap formed around a comb-teeth part varying with expansion and contraction in a bridge axial direction by engaging a pair of comb-teeth parts, the filling material 10 comprising a body 20 arranged between a convex of the comb-teeth part and a concave of the comb-teeth part opposed thereto and an end coupling part 30 coupling adjacent bodies 20 at the convex and concave, the body 20 is made into a hollow cross-sectional shape and formed into the gap in an arrangeable manner, and a bottom plate part 40 that blocks an intermediate part except both end parts in the bridge axial direction is arranged between the adjacent bodies 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a filling material for a bridge expansion and contraction device.

An expansion device for a bridge is used between the joints of the floor slabs of a road bridge in order to cope with expansion and contraction caused by a load of a vehicle or the like or a temperature change.
In a bridge expansion and contraction device, for example, a pair of substantially triangular comb teeth portions are meshed with each other to change the gap, thereby allowing expansion and contraction in the direction of the bridge axis and ensuring traveling performance of a vehicle or the like (Patent Document) 1).
On the other hand, in recent years, the number of scenes where a bicycle travels on a telescopic device for a bridge on a roadway has increased, and it is necessary to be able to travel safely through a gap between the telescopic device for a bridge.

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

JP 2004-143845 A Japanese Utility Model Publication 3-32565

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

  The present invention has been made in view of the above-mentioned problems of the prior art, and does not cause a large reaction force due to the contraction of the gap or jumps to the surface, and is a bridge expansion and contraction device that is excellent in stretchability and workability. The purpose is to provide a filling material.

In order to achieve the above object, the interlining material for a bridge expansion and contraction device according to the present invention is:
A pair of comb teeth are engaged with each other and formed by an elastic member disposed in a gap formed around the comb teeth that change with the expansion and contraction of the bridge expansion and contraction device that allows expansion and contraction in the bridge axis direction. It is a filling material for bridge expansion and contraction device,
A body portion disposed between the crest portion of the comb tooth portion and the trough portion of the comb tooth portion opposed thereto;
An end connecting portion that connects the adjacent main body portions with the peak and the valley, and
The body portion is formed in a hollow cross-sectional shape so as to be disposed in the gap,
Between the adjacent main body portions, a bottom plate portion that closes an intermediate portion excluding both ends in the bridge axis direction is disposed.
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 tooth portion due to the approach between the comb tooth portions.

  It is preferable that the main body part and the end part connection part are formed at a height that does not protrude from the surface of the comb tooth part even by compression due to the approach between the comb tooth parts.

  It is preferable that a deformation adjusting unit that adjusts a compression deformation allowance due to the approach between the comb teeth portions is formed in the end connecting portion, and the deformation adjusting portion includes a notch formed in the end connecting portion and It is preferable that the adjustment hole is configured.

  In the interlining material, it is preferable that the planar shape of each tooth portion of the comb tooth portion is formed in any one of a substantially triangular shape, a substantially trapezoidal shape, and a substantially elliptical arc shape.

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

  According to the present invention, a large reaction force does not occur due to the contraction of the gap, and it does not jump out to the surface, so that it can be excellent in followability to stretching and workability.

BRIEF DESCRIPTION OF THE DRAWINGS It is applied to one embodiment of the filling material of the expansion-contraction apparatus for bridges of this invention, (a) is an external appearance perspective view, (b) is an external appearance perspective view of a back surface. It is a partial expansion perspective view concerning one embodiment of the present invention. 1A is a plan view and FIG. 4B is a front view according to an embodiment of the present invention. 3A is a cross-sectional view taken along the line AA in FIG. 3A, FIG. 4B is a cross-sectional view taken along the line BB in FIG. 4A, and FIG. It is CC sectional drawing in (a). 1A is a front view of a bridge expansion and contraction device according to an embodiment of the present invention, and FIG. 1A is a plan view in an approaching state, and FIG. 2B is a plan view in a separated state according to an embodiment of the present invention. The bridge expansion-contraction apparatus concerning one embodiment of this invention and the state of the one side of a padding material are shown typically, (a) is a maximum separation state, (b) is a standard time state, (c) is It is explanatory drawing which shows a minimum approach state, respectively. BRIEF DESCRIPTION OF THE DRAWINGS The state of the padding material concerning one embodiment of this invention is shown typically, (a) is an explanatory view showing a state at the standard time and (b) showing a minimum approach state, respectively.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a filling material for a bridge expansion and contraction device according to the present invention will be described in detail with reference to the drawings.
As shown in FIG. 5, for example, as shown in FIG. 5, the interlining material 10 for the bridge expansion and contraction device of the present invention meshes the pair of comb teeth portions 2 and 2 with each other in the bridge axis direction (left and right direction on the paper surface). When the expansion and contraction of the zigzag is allowed, the clearance 3 is disposed in the zigzag gap 3 formed around the comb teeth 2 and 2 that changes with the expansion and contraction, and the gap 3 is filled by following the change of the zigzag gap 3. It is made of an elastic member such as natural rubber, synthetic rubber or resin.

In the bridge expansion and contraction device 1, each tooth portion of the comb tooth portion 2 is formed in a substantially triangular shape in plan view, and the peak portion 2 a at the front end and the trough portion 2 b at the base end face each other with a predetermined interval. So that it is placed at the joint of the floor slab. A waterstop support 4 is provided below the comb teeth 2 in parallel with the comb teeth 2. The water stop material 5 is installed on the water stop material support portions 4 and 4 so as to block the lower side of the pair of comb teeth portions 2 and 2.
Therefore, in this bridge expansion and contraction device 1, a pair of comb teeth 2 and 2 is formed so as to mesh the crests 2a and valleys 2b at the tips of the teeth of the comb teeth 2 and 2 constituting the face plate. Is attached to the floor slab, even if the gap 3 between the comb teeth 2 and 2 changes due to expansion and contraction in the direction of the bridge axis, it is possible to ensure the running performance of the vehicle. Further, by installing a filling material 10 to be described later in the gap 3 between the comb tooth portions 2 and 2 of the bridge expansion and contraction device 1, the traveling performance of a vehicle such as a bicycle can be ensured.
In addition, rainwater and the like are secured by the waterstop 5 installed on the waterstop support 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 elliptic arc shape. When the two are engaged with each other and expanded or contracted in the bridge axis direction, a gap 3 such as a zigzag or a waveform 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 and the like, the padding material 10 is disposed so as to close a zigzag gap 3 formed around the pair of comb teeth 2 and 2 of the bridge expansion and contraction device 1.
The interlining material 10 is a main body that forms a straight portion of a zigzag gap 3 between a crest 2a at the distal end of the tooth portion of the comb tooth portion 2 and a trough portion 2b at the proximal end of the comb tooth portion 2 opposed to the crest portion 2a. Part 20 and two main body parts 20 arranged in an adjacent V shape are provided with end connecting parts 30 that connect peak parts 2a at the tips of comb teeth part 2 or valley parts 2b. ing. Further, the main body 20 has a hollow cross-sectional shape and is formed so as to be disposed in the gap 3. Between the adjacent main bodies 20, a bottom plate 40 that closes an intermediate portion excluding both ends in the bridge axis direction. Is arranged. That is, the bottom plate portion 40 is provided not only in the bridge axis direction of the interlining material 10 but only in an intermediate portion excluding both ends, and is formed so as to close the lower end between the main body portions 20.

The main body portion 20 includes side wall portions 20a on both sides, is formed in a hollow shape having a substantially inverted U-shaped cross section and is formed in an arch shape, and a groove-shaped opening portion 21 is formed in the bottom portion.
The main body portion 20 is provided with a bottom plate portion 40 so as to close a space 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. A bottom plate portion 40 is disposed at an intermediate portion excluding the portion.
That is, between the adjacent main body parts 20, the bottom plate part 40 is provided so as to block only the intermediate part in the bridge axis direction, and the main body part 20 extends upward from the bottom plate part 40 formed in the intermediate part excluding both end parts. It protrudes in a substantially inverted U shape. Thus, the bottom surface of the interlining material 10 is closed between the main body portions 20 by the bottom plate portion 40, and the main body portion 20 is in a state where a groove-shaped opening 21 is formed.
By forming the main body portion 20 in an arch shape, the filling material 10 ensures strength against a load from above, and at the same time, can suppress reaction force due to compression applied to the comb teeth portion 2.

The end connecting part 30 is a part that connects the peak parts 2 a at the distal ends of the main body part 20 and the valley parts 2 b at the proximal end at the end parts. The end connecting portion 30 is formed in a substantially V shape in plan view, the tip of the V-shaped valley portion is closed, and the two end portions opposite to the valley portion are opened. Is formed. The end connecting portion 30 has a substantially V-shaped hollow portion with a side wall portion 30a on both sides and a partition wall portion 30b on both sides, and has a substantially inverted U-shaped cross section on both sides and an arch shape. Two hollow portions are formed, and the hollow portion is narrower toward the tip. The two adjacent openings on the opposite side of the valley portion of the end connecting portion 30 are integrally connected to the adjacent main body portions 20 so that the hollow portions communicate with each other. Similarly to the main body part 20, the end connecting part 30 has an approximately inverted U-shape projecting upward from the bottom plate part 40 and has an arch shape. 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 formed by the main body 20. The openings 21 and 31 are narrower toward the tip, and the openings 21 and 31 are in communication with each other.
Thereby, the interlining material 10 is formed in a zigzag in which the planar shape is substantially V-shaped, both end portions 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 part excluding both ends between the main body parts 20 is connected and closed by the bottom plate part 40.
The end connection part 30 can suppress the reaction force by the compression added to the comb-tooth part 2 while ensuring the intensity | strength with respect to the load from upper direction similarly to the main-body part 20 by forming a cross-sectional shape in arch shape. I am doing so.

The bottom plate portion 40 is formed continuously with the main body portion 20 so as to close an intermediate portion excluding both ends in the bridge axis direction between the adjacent main body portions 20.
Both ends of the main body portion 20 are connected by the end connecting portions 30, and the bottom plate portion 40 is formed in a plate shape that closes the zigzag outer space of the intermediate portion excluding both ends of the interlining material 10 in the bridge axis direction. 20 is formed integrally.
The bottom plate portion 40 is disposed on the lower side of the comb tooth portion 2 and is attached so as to be laid on the upper surface of the water blocking material 5. The main body portion 20 and the end connection portion 30 are connected to the comb teeth of the bridge expansion and contraction device 1. It can be positioned within the gap 3 between the parts 2.
As a result, the interlining material 10 has the main body portion 20 and the end connecting portion 30 formed in an arch-like cross-sectional shape, projecting upward from the bottom plate portion 40, and disposed in the zigzag gap 3. It can be closed regardless. Moreover, the interlining material 10 can be installed on the water stop material 5 below the comb tooth portion 2 of the bridge expansion and contraction device 1 without being fixed with a bolt or the like.
Further, the bottom plate portion 40 prevents the filling material 10 itself from coming out of the gap 3 between the comb teeth portions 2.

The formation range of the bottom plate portion 40 of the filling material 10 is an intermediate portion excluding both end portions in the bridge axis direction, and specifically, the valley portions of the comb tooth portions 2 and 2 due to the proximity of the comb tooth portions 2 and 2. 2b is provided at an intermediate portion that does not interfere with 2b.
In the state where the bottom plate portion 40 is installed in the bridge expansion and contraction device 1, the comb tooth portion 2 spreads from the standard state (see FIG. 7B) to the maximum separated state as schematically shown on one side in FIG. (Refer to (a) in the figure) or move on the bottom plate part 40 while narrowing to the minimum approaching state (see (c) in the same figure). When the comb tooth portion 2 moves on the bottom plate portion 40 and the gap 3 between the comb tooth portions 2 is narrowed, the bottom surface 2c of the comb tooth portion 2 and the bottom plate portion 40 of the interlining material 10 may 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 pressed down by the water blocking material 5 (see FIG. 5). ) (See FIGS. 5 and 6).
As schematically shown in FIG. 8, the interstitial material 10 displaced upward is sandwiched between the V-shaped side walls of the valley portion 2 b of the comb tooth portion 2, and the sandwiched portion appears to rise and is sandwiched. As a result, the displacement in the direction of the bridge axis becomes impossible due to the resistance force, 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 into the raised portion.

Therefore, the bottom plate portion 40 is formed only in the intermediate portion excluding both end portions in the bridge axis direction, so that interference with the comb tooth portion 2 can be prevented.
In particular, the comb tooth portion 2 is formed in a taper shape in which the bottom surface 2c has a thin peak portion 2a at the tip and a thick bottom portion 2b at the base end, so that the friction with the filling material 10 is increased. If it interferes with a thick plate portion, smooth displacement of the interlining material 10 cannot be ensured, but the bottom plate portion 40 is formed smoothly in the middle portion. Accurate displacement can be ensured.

In such a filling material 10, the width (arch-shaped outer width) w and height (arch-shaped outer height) h <b> 1 and h <b> 2 in the cross section of the main body portion 20 and the end connecting portion 30 are as follows. Is set as follows.
The width w of the main body portion 20 and the end connecting portion 30 corresponds to the interval between the side wall portions 20a or the interval between the side wall portions 30a and is formed to have the same width w (see FIGS. 4B and 4C). ).
The width of the interlining material 10 (the distance between the peak portion 2a at the front end and the trough portion 2b at the base end) W is a space between the comb tooth portion 2 of the bridge expansion and contraction device 1 in a state where the comb tooth portion 2 is separated. Even if there is a gap 3a between the material 10 and the material 10, the width W2 is set so that the vehicle can travel without any trouble even if a vehicle such as a bicycle travels on the bridge telescopic device 1 (see FIG. 6B). In addition, W1 is a width | variety in the state in which the comb-tooth part 2 approached.
The arch-like height of the filling material 10 is formed such that the main body portion 20 is as high as h1 and the end connecting portion 30 is slightly low as h2 (see FIG. 4A). The heights h1 and h2 of the padding material 10 protrude from the surface of the comb teeth portion 2 even when the comb teeth portions 2 of the bridge expansion and contraction device 1 approach each other and are 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. 6B), the height h2 can travel without hindrance even if a vehicle such as a bicycle travels on the comb teeth 2 of the bridge telescopic device 1. It is set.

In this interlining material 10, the end connecting portion 30 includes the side wall portions 30 a on both sides and the intermediate partition wall portion 30 b, so that it is compressed as compared with the case of only the side wall portions 20 a on both sides of the main body portion 20. 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 adjustment hole 51 formed from the upper surface to the lower surface of the partition wall portion 30b, one end communicating with the adjustment hole 51, and the other end being V-shaped. And an incision 52 that opens to the opening side.
The rigidity of the partition wall portion 30b can be changed according to the size and depth of the adjustment holes 51, or the width and depth of the cuts 52, and the deformation allowance of the end connecting portion 30 can be adjusted.
That is, in a state where the comb teeth 2 of the bridge expansion and contraction device 1 come close to each other and the end connecting portion 30 is compressed, it is prevented from jumping out to the surface of the comb teeth 2 and is compressed by the comb teeth 2. The deformation allowance is adjusted so that the reaction force caused by this does not hinder the structure of the comb tooth portion 2.
The deformation adjusting portion 50 provided in the end connecting portion 30 is not necessarily required for the interlining material 10 and may be appropriately employed depending on the use conditions of the bridge expansion and contraction device 1.

The interlining material 10 for the bridge expansion and contraction device configured as described above is a state in which the gap 3 between the comb teeth portions 2 of the bridge expansion and contraction device 1 is maximally widened and attached to the waterstop support 4. Attach so as to lay on the upper surface of the water material 5.
This eliminates the need for bolt attachment and bonding, and allows easy installation, ensuring workability.
On the other hand, even if the interval between the comb teeth portions 2 of the bridge expansion and contraction device 1 becomes narrow due to expansion and contraction, the spacing material 10 follows and deforms, and the spacing material 10 does not jump out to the surface. Even if the gap becomes wider, the interlining material 10 is deformed so as to follow and return to the original state. For example, even if a gap 3a is formed between the interlining material 10 and one comb tooth portion 2, It is designed not to cause trouble in traveling and to ensure follow-up performance.
Moreover, in the interlining material 10, the interference with the comb-tooth part 2 can be prevented by forming the bottom plate part 40 only in the intermediate part excluding both ends in the bridge axis direction.
That is, the comb-tooth portion 2 has a taper shape (vertical direction thickness) in which the bottom surface 2c has a thin peak portion 2a (vertical thickness) and a base trough portion 2b thick. In some cases, the friction with the interlining material 10 may be reduced by forming it into a tapered shape, and when the plate thickness interferes with a thick part, a smooth displacement of the interlining material 10 is ensured. Although it becomes impossible, smooth displacement and a deformation | transformation state are ensured by forming the baseplate part 40 in an intermediate part.
In addition, if the padding material 10 moves so as to slide on the waterstop material 5, the gap 3a is dispersed on both sides of the padding material 10 due to the expansion and contraction of the comb teeth portion 2, and thus the vehicle such as a bicycle is further reduced. There will be no obstacles to driving.

Next, in such a filling material 10, if the filling material 10 moves so as to slide on the waterstop material 5, the followability to expansion and contraction of the comb teeth portion 2 of the bridge expansion and contraction device 1 is improved. The gaps 3 are dispersed on both sides of the stuffing 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 to the lower surface of the bottom plate portion 40 of the interlining 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 adhesion or the like.
As the uneven shape, a large number of spherical protrusions, a semicircular protrusion, or a mesh structure may be used.

As described in detail in conjunction with the above-described embodiment, according to the interlining material 10 of the bridge expansion and contraction device of the present invention, a pair of comb teeth portions 2 are engaged with each other and the bridge is allowed to expand and contract in the axial direction of the bridge. An interlining material 10 for a bridge expansion / contraction device 1 formed of an elastic member and disposed in a gap 3 formed around a comb tooth portion 2 that changes with expansion / contraction of the expansion / contraction device 1, The main body part 20 disposed between the peak part 2a and the valley part 2b of the comb tooth part 2 opposed to the peak part 2a, and the end part connecting part that connects the adjacent main body parts 20 with the peak part 2a and the valley part 2b. 30, and the main body portion 20 is formed in a hollow cross-sectional shape so as to be disposed in the gap 3, and between the adjacent main body portions 20, an intermediate portion excluding both ends in the bridge axis direction is provided. Since the bottom plate portion 40 to be closed is disposed, a large reaction force is generated due to the contraction of the gap 3 or the surface plate jumps to the surface. Without issue, followability to stretch, it is possible to improve the workability. Moreover, since the interlining material 10 is provided with the baseplate part 40 in the intermediate part except the both ends of a bridge axis direction, it can prevent that the comb-tooth part 2 and the baseplate part 40 interfere, and can block the gap | interval 3. it can.
In addition, the interlining material 10 can be kept in the state where it is installed in the bridge expansion and contraction device 1 by preventing it from coming out without requiring bolts or bonding treatment.

  Further, in the interlining material 10 for the bridge expansion and contraction device, the bottom plate portion 40 that closes the space between the main body portions 20 is provided at an intermediate portion that does not interfere with the valley portion 2b of the comb tooth portion 2 due to the proximity of the comb tooth portions 2. Therefore, even if the comb tooth portions 2 approach each other, the comb tooth portion 2 and the bottom plate portion 40 can be prevented from interfering with each other, and the gap 3 between the comb tooth portions 2 can be blocked without generating a gap or protruding upward. it can. Thereby, driving | running | working safety | security of vehicles, such as a motor vehicle and a bicycle, can be ensured.

  Further, in the interlining member 10 for the bridge expansion and contraction device, 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 portion 2 even by compression due to the closeness of the comb tooth portions 2. Therefore, traveling safety of vehicles such as automobiles and bicycles can be ensured.

  Further, in the interlining material 10 for the bridge expansion and contraction device, the end connecting portion 30 is formed with the deformation adjusting portion 50 that adjusts the compression deformation allowance due to the closeness of the comb teeth 2 to each other. The reaction force accompanying the deformation can be further reduced even if compressed by.

  Further, in the interlining material 10 for the bridge expansion and contraction device 10, the deformation adjusting portion 50 is configured by the cut 52 and / or the adjustment hole 51 formed in the end connection portion 30. The deformation allowance can be easily adjusted.

  Further, in the interlining material 10 for the bridge expansion and contraction device, the planar shape of each tooth portion of the comb tooth portion 2 is configured by any one of a substantially triangular shape, a substantially trapezoidal shape, and a substantially elliptical arc shape. The interlining material 10 can be disposed in the gap 3 around the.

  Further, in the interlining material 10 for the bridge expansion and contraction device, the interlining material 10 is provided on the lower surface of the bottom plate portion 40 as a single body or as a separate body. The following capability can be further improved.

  Further, in the interlining material 10 for the bridge expansion and contraction device, the bottom surface of the bottom plate portion 40 is formed in an uneven shape, so that the followability accompanying expansion and contraction can be improved by this uneven shape.

  In the above embodiment, the case where the interlining material 10 is installed in the zigzag gap 3 of the bridge expansion and contraction device 1 has been described as an example. However, when the shape of the gap 3 differs depending on the shape of the comb tooth portion 2. The interlining material 10 may be formed in a shape corresponding to the gap 3 and installed.

DESCRIPTION OF SYMBOLS 1 Bridge expansion-contraction apparatus 2 Comb-tooth part 2a Mountain part 2b Valley part 2c Bottom face 3 Gap 3a Gap 4 Water-stop material support part 5 Water-stop material 10 Filling material 20 Main-body part 20a Side wall part 21 Opening part 30 End part connection part 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)

A pair of comb teeth are engaged with each other and formed by an elastic member disposed in a gap formed around the comb teeth that change with the expansion and contraction of the bridge expansion and contraction device that allows expansion and contraction in the bridge axis direction. It is a filling material for bridge expansion and contraction device,
A body portion disposed between the crest portion of the comb tooth portion and the trough portion of the comb tooth portion opposed thereto;
An end connecting portion that connects the adjacent main body portions with the peak and the valley, and
The body portion is formed in a hollow cross-sectional shape so as to be disposed in the gap,
Between the adjacent main body portions, a bottom plate portion that closes an intermediate portion excluding both ends in the bridge axis direction is disposed.
Spacing material for bridge expansion and contraction device. 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 interlining material for a bridge extension / contraction device according to claim 1. The main body part and the end connection part are formed at a height that does not protrude from the surface of the comb tooth part even by compression due to the proximity of the comb tooth parts.
A filling material for a bridge expansion and contraction device according to claim 1 or 2. The end connecting portion is formed with a deformation adjusting portion that adjusts a compression deformation allowance due to the approach between the comb teeth portions,
A filling material for a bridge expansion and contraction device according to any one of claims 1 to 3. The deformation adjusting portion is configured by a notch and / or an adjustment hole formed in the end connecting portion.
The filling material for a bridge expansion and contraction device according to claim 4. The interstitial material, the planar shape of each tooth portion of the comb tooth portion is configured in any of a substantially triangular shape, a substantially trapezoidal shape, a substantially elliptical arc shape,
A filling material for bridge expansion and contraction device according to any one of claims 1 to 5. The interlining material comprises a sliding material integrally or separately on the lower surface of the bottom plate portion,
A filling material for a bridge expansion and contraction device according to any one of claims 1 to 6. The interlining material is formed such that the bottom surface of the bottom plate portion is uneven.
A filling material for a bridge expansion and contraction device according to any one of claims 1 to 7.

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