KR102300099B1 - Expansion joint device for integrated bridge that prevents damage caused by load - Google Patents

Abstract

The present invention relates to an expansion joint device for an integrated bridge that prevents damage due to load. More particularly, the present invention relates to an expansion joint device for an integrated bridge that prevents damage and breakage caused by loads and shocks applied from the top by preventing damage and breakage during contraction and expansion of slabs by constructing them in the gaps of structures in bridges.

Description

Expansion joint device for integrated bridge that prevents damage caused by load

The present invention relates to an integrated bridge expansion joint device that prevents damage due to load, and more particularly, prevents damage and breakage during contraction and expansion of a slab by constructing it in a gap between structures of a bridge, and the load applied from the upper part And it relates to an expansion joint device for an integrated bridge that prevents damage due to a load that prevents damage due to impact.

In general, finger joints are installed in slabs constituting a bridge at regular intervals so that they can respond to expansion and contraction of the slab when expansion and contraction occurs.

Through this, it is possible to properly respond to the expansion and contraction caused by the structural or seasonal change of the bridge deck, thereby preventing damage and damage.

These finger joints are detachably combined with a base angle at the bottom through bolts, nuts, etc., and then the base angle is installed on the slab.

However, in the finger joint, the fatigue of the bolt connecting to the base angle is accumulated and fractured due to frequent stretching force action or impact and load applied by a vehicle moving the bridge.

Accordingly, the bolt is broken and the finger joint cannot be separated from the base angle, resulting in a problem that partial replacement is impossible.

In addition, the finger joint is separated from the base angle, protrudes, dents, torsion, etc. occur due to the breakage of the bolt, which causes an accident in the driving vehicle.

As a prior art for solving this problem, a "finger joint for a bridge including a structure for preventing separation of a finger plate" has been proposed.

The prior art employs a fastening member inserted into a slit formed in the finger body and angle to restrict the flow of the finger body and angle, thereby preventing the finger plate from being separated due to loosening of the anchor bolt.

In addition, by forming an extension part extending downwardly and a fixing part extending horizontally from the lower end of the extension part on the fastening member, the fastening member is strongly fixed by concrete to limit the flow of the finger body and angle and to prevent the finger plate from being separated. can be prevented

As described above, the loosening of the anchor bolt is prevented through the fastening member, thereby preventing separation and damage of the finger joint.

However, the anchor bolt and the fastening member are broken by the impact and load applied during the passage of the vehicle, so that partial separation for replacement is difficult.

Therefore, it cannot be partially separated by the breakage of the bolt, and a lot of time and money are incurred to replace the entire bridge finger joint installed in the bridge.

In addition, the packing is installed to prevent foreign substances from entering between the gaps in which the bolts are installed, but there is a problem that foreign substances and rainwater are introduced between the gaps in which the packing is worn for a long period of time.

In addition, due to the aging of the packing, the fastening force of the bolts is weakened, causing the finger joint to protrude, collapse, and twist, causing a vehicle accident.

Korean Patent Registration No. 10-2212014 (2021.01.29.)

The present invention has been devised to solve the above problems, and an object of the present invention is to prevent damage and breakage of the bridge due to contraction and expansion due to temperature change by being installed at regular intervals on the bridge. An object of the present invention is to provide an expansion joint device for an integrated bridge that prevents

Another object of the present invention is to provide an integrated bridge expansion joint device that prevents damage due to load, which prevents damage, damage, and torsion due to impact and load applied during driving of a vehicle.

Another object of the present invention is to prevent damage caused by the collapse and protrusion of the upper finger plate due to the load applied for a long period of time by connecting through welding, and it is constructed as an integral part to prevent damage caused by a load that is easy to replace. To provide a joint device.

Another object of the present invention is to fix the discharge plate for discharging the introduced sewage and foreign substances through magnetism to prevent separation due to contraction and expansion of the angle plate, impact, etc., and a load that can be fixed through magnetism at a specific position. An object of the present invention is to provide an integrated bridge expansion joint device that prevents damage caused by

Another object of the present invention is to provide an integrated expansion joint device for a bridge that prevents damage due to a load that can easily check the pouring state of the poured mortar with the naked eye from the outside.

The present invention for achieving the above object is an integrated bridge expansion joint device that is installed on a bridge to prevent damage caused by a load to prevent damage during contraction and expansion of slabs. a pair of finger plates arranged on both sides so as to form grooves, and fingers intersecting each other are formed on one inner surface; an anchor plate disposed on the lower surface of the finger plate at regular intervals and welded to the finger plate; an angle plate coupled to the inner surface of the anchor plate so as to be in close contact with the lower surface of the finger plate and disposed along the longitudinal direction on both sides of the gap groove; It characterized in that it consists of a pouring part in which the mortar is poured so that the anchor plate is embedded at the boundary between the upper surface of the finger plate and the inner surface of the angle plate.

Preferably, the finger plate includes a threaded hole formed between the anchor plates through which the mortar flows.

The anchor plate includes a contact plate formed along the width direction of the finger plate and welded to the lower surface of the finger plate, and an extension plate protruding from the lower portion of the contact plate and having a relatively narrower width than the contact plate; , it is preferable that the extension plate protrudes under the extension plate and is formed to have the same width as the contact plate to form a buried plate.

It is preferable that an extension plate protruding from both sides of the contact plate and welded to the lower surface of the finger plate, and a buried bar protruding from both sides of the extension plate and the buried plate to be embedded in the pouring part are further included.

It is preferable that a support bar coupled to the angle plate, protruding between the anchor plate and the anchor plate, and coupled to the inside of the poured pouring part is further included.

It is preferable that fitting projections are formed on the inner surface of the anchor plate in the longitudinal direction, and drain plates disposed at the lower ends of the gap grooves, both ends of which are fixed to the fitting projections, are formed.

The fitting projection is made of a material contacted by magnetism, and a plurality of magnetic bodies disposed along the longitudinal direction are formed at both ends of the drain plate, and the fitting plate is inserted into the fitting projection and fixed by the magnetism of the magnetic material. preferably included.

According to the integrated bridge expansion joint device for preventing damage due to load according to the present invention, it is installed at regular intervals on the bridge to prevent damage and damage to the bridge due to contraction and expansion according to temperature change.

According to the present invention, there is an advantage in that the finger plate, the ankle plate and the anchor plate are firmly fixed through welding to prevent damage, damage, twist, etc. due to the impact and load applied during the driving of the vehicle.

According to the present invention, there is an advantage in that the finger plate is prevented from collapsing and protruding damage due to a load applied for a long period of time to facilitate the passage of a vehicle and to prevent an accident.

According to the present invention, it is made integrally through welding to solve the problems of breakage and partial separation due to fracture of bolts, etc., and has the effect of withstanding a strong load and impact.

According to the present invention, there is an advantage that can be easily constructed according to the field conditions by selectively pouring mortar.

According to the present invention, there is an advantage in that the discharge plate for discharging the introduced sewage and foreign substances is fixed through magnetism to prevent separation due to contraction and expansion of the angle plate, impact, and the like, and to be fixed through magnetism at a specific position.

According to the present invention, there is an advantage in that the state of mortar can be easily checked with the naked eye from the outside.

1 is a perspective view showing an expansion joint device for an integrated bridge that prevents damage due to a load according to the present invention;
2 is an exploded perspective view showing an exploded state according to the present invention;
3 is a cross-sectional view showing an internal cross-section according to the present invention;
4 is a perspective view showing an anchor plate according to the present invention;
5 is a conceptual diagram illustrating a magnetic body according to the present invention;
6 is a conceptual diagram illustrating an installation state according to the present invention.

Hereinafter, an expansion joint device for an integrated bridge that prevents damage due to a load according to the present invention will be described in detail together with the accompanying drawings.

1 is a perspective view showing an integrated bridge expansion joint device that prevents damage by load according to the present invention, FIG. 2 is an exploded perspective view showing an exploded state according to the present invention, and FIG. 3 is an interior according to the present invention It is a cross-sectional view showing a cross-section, FIG. 4 is a perspective view showing an anchor plate according to the present invention, FIG. 5 is a conceptual diagram showing a magnetic body according to the present invention, and FIG. 6 is a conceptual diagram showing an installation state according to the present invention. .

As shown in FIGS. 1 to 6, the present invention relates to an integrated bridge expansion joint device that prevents damage due to load. It relates to an integrated bridge expansion joint device that prevents breakage and prevents breakage by load that prevents breakage by load and impact applied from the upper part.

To this end, the present invention is installed on a bridge to prevent breakage, damage and torsion during contraction and expansion of the slab, and to facilitate maintenance, finger plate 10, anchor plate 20, angle plate 30 and It consists of a pouring part (40).

The finger plates 10 are arranged in pairs on both sides so as to be spaced apart from each other at a predetermined distance to form a gap groove 11, and fingers 12 intersecting each other are formed on one inner surface.

A plurality of anchor plates 20 are disposed on the lower surface of the finger plate 10 at regular intervals and are welded to the finger plate 10 .

The angle plate 30 is coupled to the inner surface of the anchor plate 20 so as to be in close contact with the lower surface of the finger plate 10 and is disposed on both sides of the gap groove 11 in the longitudinal direction.

In the pouring part 40 , the mortar is poured so that the anchor plate 20 is embedded with the boundary between the upper surface of the finger plate 10 and the inner surface of the angle plate 30 .

That is, the finger plates 10 are arranged as a pair on both sides, and the anchor plate 20, the angle plate 30 and the pouring part 40 are formed at the lower end of each of the finger plates 10.

In this formed state, it is possible to prevent damage and damage through the gap groove 11 corresponding to the contraction and expansion of the slab poured on the bridge by installing it on the bridge at regular intervals.

In addition, the finger plate 10 is welded to the anchor plate 20 to prevent torsion, protrusion, depression, etc. of the finger plate 10 by the load and impact applied during vehicle movement.

In addition, it is preferable that a separate reinforcing bar or the like is embedded in the inside of the pouring part 40 in the same manner as in the concrete pouring for solid pouring.

Next, each configuration according to the present invention will be described in detail.

First, the finger plates 10 are spaced apart from each other at regular intervals so as to form the gap grooves 11 and are arranged in pairs on both sides.

The finger plate 10 is made of a plate material disposed along the width direction of the bridge, and the fingers 12 are formed on one surface facing each other.

At this time, the finger 12 is formed along the zigzag direction, and a round is formed at the end and the inner end.

Through this, the finger plate 10 is arranged such that the fingers 12 are formed on one surface facing each other to form the spaced grooves 11 spaced apart from each other by a predetermined distance along the zigzag direction.

And the finger plate 10 includes a thread hole 13 formed between the anchor plates 20 through which mortar is introduced.

A plurality of these threaded holes 13 are formed along the longitudinal direction of the finger plate 10, and the mortar poured from the pouring part 40 is introduced to visually check the pouring state of the pouring part 40. made to be possible

In addition, the mortar introduced into the threaded hole 13 is poured to match the top surface of the finger plate 10, and the finger plate 10 and the pouring part 40 are firmly attached to each other to prevent impact and load. Stability can be improved.

In addition, since mortar flows into the thread hole 13, it can be easily constructed without additional finishing treatment such as reinforcement or packing.

Next, a plurality of anchor plates 20 spaced apart from each other by welding are coupled to the lower surface of the finger plate 10 .

At this time, the anchor plate 20 has a plate shape, and is welded to the lower end of the finger plate 10 so as to support the load applied to the contact plate 20a, the extension plate 20b and the buried plate ( 20c).

The contact plate 20a is formed along the width direction of the finger plate 10 and welded to the lower surface of the finger plate 10 .

The extension plate 20b protrudes below the contact plate 20a and has a relatively narrower width than that of the contact plate 20a.

The buried plate 20c protrudes below the extension plate 20b and has the same width as the contact plate 20a.

In this case, the width of the buried plate 20c is preferably wider than that of the contact plate 20a, but is selectively formed to be narrower or wider than the extension plate 20b.

That is, the contact plate 20a and the buried plate 20c are formed to have a relatively wider width than the extension plate 20b.

At this time, the upper surface of the contact plate (20a) is in contact with the lower surface of the anchor plate (20) is welded.

Here, the contact plate 20a is preferably disposed coincidentally with or adjacent to the outer surface of the anchor plate 20 to form a space in which the angle plate 30 is disposed on the inner surface.

And the buried plate (20c) is made to be firmly fixed by the mortar poured on the pouring portion (40) to support the load and impact.

Through this, the anchor plate 20 supports the finger plate 10 in a welded state, thereby preventing the finger plate 10 from being damaged, damaged, or twisted due to a high load or impact.

In addition, a plurality of insertion grooves 14 are formed in the lower surface of the finger plate 10 at regular intervals along the longitudinal direction into which the anchor plate 20 is inserted.

That is, the insertion groove 14 is formed to have the same shape as that of the upper surface of the contact plate 20a, so that the insertion groove 14 can be easily inserted and fixed, and then welded.

Through this, the anchor plate 20 can be conveniently placed on the lower end surface of the finger plate 10 through the insertion groove 14 and then welded.

Therefore, the anchor plate 20 inserted into the insertion groove 14 can support the impact and load in the vertical direction and respond to the impact in the horizontal direction at the same time.

And the extension plate 21 and the embedding bar 22 protruding to both sides of the anchor plate 20 are further included.

The extension plate 21 protrudes from both sides of the contact plate 20a and is welded to the lower surface of the finger plate 10 .

That is, the extension plate 21 protrudes from both sides of the contact plate 20a and is welded to the bottom surface of the finger plate 10 to be supported.

Therefore, the extension plate 21 supports the finger plate 10 through a frame to protrude vertically and horizontally, in a rib shape to protrude to the side of the contact plate 20a, or to resist the load and impact applied from the upper part. Reinforced to prevent damage and breakage.

The embedding bar 22 protrudes from both sides of the extension plate 20b and the embedding plate 20c and is embedded in the pouring part 40 .

The embedding bar 22 firmly fixes the anchor plate 20 to the mortar which is protruded from both sides of the extension plate 20b and the buried plate 20c and is poured.

Accordingly, as the embedding bars 22 protruding from both sides are embedded in the pouring part 40, the pouring part 40 and the anchor plate 20 are buried without protruding to the outside and delivered from the finger plate 10. It can support loads and shocks.

Next, the angle plate 30 protrudes to the inside of the anchor plate 20 to support the finger plate 10, and a drain plate 50 for discharging foreign substances and rainwater discharged into the gap groove 11. this is concluded

Accordingly, the angle plate 30 has a cross-sectional shape of "a" consisting of a horizontally disposed top plate 30a and a side plate 30b formed vertically downward from one end of the top plate 30a.

At this time, the other side of the upper plate (30a) is coupled to the inner surface of the upper end of the anchor plate (20), the upper surface is in contact with the lower surface of the finger plate (10).

In addition, the side plate 30b is spaced apart from the lower end of the gap groove 11 by a predetermined interval and disposed on both sides.

Through this, the upper plate 30a of the angle plate 30 extends from the anchor plate 20 toward the gap groove 11 to support the lower portion of the finger plate 10 .

In addition, the side plate 30b is spaced apart from the spacing groove 11 by a predetermined interval to form a space so that foreign substances and sewage introduced into the spacing groove 11 can be introduced.

And a support bar 32 coupled to the angle plate 30, protruding between the anchor plate 20 and the anchor plate 20, and coupled to the inside of the poured pouring part 40 is further included. .

That is, the support bar 32 has one side coupled to the angle plate 30 , is disposed toward the outer surface of the finger plate 10 , and is located on the anchor plate 20 and the anchor plate 20 . This is done to avoid interference.

Through this, the support bar 32 is in close contact with the reinforcing bar embedded in the pouring part 40 to firmly support the angle plate 30 and prevent deformation and twisting.

In addition, a plurality of confirmation grooves 33 are formed on the upper surface of the angle plate 30 .

The confirmation groove 33 is made to check the embedding state of the pouring part 40 poured into the angle plate 30 like the thread hole 13 .

Therefore, it is preferable that the confirmation groove 33 is positioned between the finger 12 and the finger 12 so that it can be visually confirmed from the outside.

And the fitting projection 31 is formed on the inner surface of the anchor plate 20 along the longitudinal direction, disposed at the lower end of the spacing groove 11, both ends of the drain plate fixed to the fitting projection 31 ( 50) is included.

Accordingly, the fitting protrusion 31 is formed along the longitudinal direction on the inner side surface of the side surface of the anchor plate 20 .

At this time, the fitting protrusion 31 has an "L" cross section so that the upper end portion is opened so that the drain plate 50 can be inserted.

And the drain plate 50 is made to discharge foreign substances and rainwater introduced through the gap groove 11 .

The drain plate 50 has a cross-sectional shape of "V", "U", "W", etc., and both ends are bent downward and inserted into the fitting protrusion 31 .

That is, both ends are inserted into the fitting protrusions 31 of the anchor plate 20 disposed on both sides to install the drain plate 50 .

Through this, the drain plate 50 is positioned under the gap groove 11 , and can guide foreign substances and rainwater introduced through the gap groove 11 to the outside and discharge it.

At this time, the fitting protrusion 31 is made of a material in contact with magnetism to prevent the drain plate 50 from being separated from the fitting protrusion 31 due to impact, and both ends of the drain plate 50 . A plurality of magnetic bodies 52 are formed along the longitudinal direction, and a fitting plate 51 inserted into the fitting protrusion 31 and fixed by the magnetism of the magnetic body 52 is further included.

Accordingly, the drain plate 50 is fixed by inserting the fitting plates 51 formed on both sides into the fitting protrusions 31 .

And a plurality of the magnetic body 52 is formed in the fitting plate 51 along the longitudinal direction, and after being inserted into the fitting protrusion 31, the fitting plate 51 is attached to the fitting protrusion 31 by magnetic force. Fix it.

Here, it is preferable that the fitting protrusion 31 is made of any one of materials such as a metal that can be magnetically fixed by contacting the magnetic body 52 .

Through this, the drain plate 50 is prevented from being separated from the fitting protrusion 31 due to an impact transmitted from the finger plate 10, etc., and is easily fixed by magnetism even if the position is moved by an impact.

In addition, even if the fitting protrusion 31 and the drain plate 50 contract and expand differently along the longitudinal direction, they are in contact with each other in a flowable manner by magnetism to prevent separation and deformation.

Next, the pouring part 40 is constructed with mortar so that the anchor plate 20 and the angle plate 30 can be cast.

Here, it is preferable that the pouring part 40 is constructed of non-shrinkable mortar.

Therefore, the pouring part 40 can be stably fixed by pouring after the anchor plate 20 and the angle plate 30 are installed on the bridge.

Alternatively, after installing the anchor plate 20 and the angle plate 30 on the finger plate 10, pouring separately, it may be disposed on the bridge.

In this way, the pouring part 40 can be easily constructed according to the situation of the bridge and the site so that the worker can pour it on the bridge or transport it to the bridge after pouring the mortar in advance, depending on the construction situation, so that the construction can be simple and convenient. is done

Through this, the pouring part 40 prevents damage and damage due to the load applied to the finger plate 10 and the impact force as the anchor plate 20 and the angle plate 30 are partially embedded and stably fixed. can be prevented

In addition, the pouring part 40 can visually confirm the pouring state of the mortar through the threaded hole 13 when pouring, and the completely poured mortar flows into the threaded hole 13 and the anchor plate 20 support easily.

In addition, since the mortar introduced into the thread hole 13 is neatly finished through a plastering operation, work for reinforcing the separate thread hole 13 is unnecessary, thereby shortening the working time and process.

Next, the installation state of the present invention will be described.

First, the finger plate 10 has the fingers 12 formed on one surface, and is disposed on both sides, and the fingers 12 face each other. are spaced apart

And the anchor plate 20 is welded to the lower end of the finger plate 10 at regular intervals to be firmly fixed.

At this time, the insertion groove 14 is formed at the lower end of the finger plate 10, and a plurality of anchor plates 20 are inserted at regular intervals to be easily welded and fixed.

Through this, the anchor plate 20 is welded to the finger plate 10 and firmly fixed to support a high load and impact.

Here, the anchor plate 20 is formed to support the load and impact of the finger plate 10 through the extension plate 21 to prevent damage and separation, and is poured through the embedding bar 22 . It is added so that it can be firmly poured into the pouring part 40 .

And the angle plate 30 is coupled as described above to support the finger plate 10, and the drain plate 50 is installed.

At this time, the angle plate 30 is firmly fixed to the anchor plate 20 through welding, and the support bar 31 is additionally installed to support the load applied from the finger plate 10 . do.

In this installed state, the finger plate 10 , the anchor plate 20 and the angle plate 30 are constructed on the bridge through the pouring part 40 .

In this case, the pouring part 40 may be poured on the anchor plate 20 in advance and then constructed on the bridge, or the pouring part 40 may be poured after the anchor plate 20 is installed on the bridge.

Through this, the finger plate 10 and the anchor plate 20 are coupled by welding to prevent torsion, damage, etc. due to the impact and load applied when the vehicle is moved.

In addition, after crushing the pouring part 40 during replacement, the finger plate 10 and the anchor plate 20 may be integrally replaced.

That is, in the case of bolts that are normally fastened, the bolts are broken by load and impact, so that the finger plate 10 cannot be removed from the anchor plate 20, so it is integrated with a cylindrical body to prevent damage and damage through more robust fixation. Problems such as twisting can be eliminated.

In addition, since partial separation is impossible due to the breakage of the bolt, as the poured mortar is crushed and replaced as an integral part, the integrally welded finger plate 10 can be conveniently constructed to reduce work and time.

In addition, the drain plate 50 may be disposed between the gap grooves 11 to induce and discharge rainwater and foreign substances introduced into the gap groove 11 .

In addition, the fitting plates 51 formed on both sides of the drain plate 50 are inserted and fixed to the fitting protrusions 31, and are tightly fixed by magnetism to prevent separation due to impact, contraction and expansion and to be easily fixed. can

As described above, the rights of the present invention are not limited to the above-described embodiments, but are defined by the claims, and those of ordinary skill in the art may make various modifications and adaptations within the scope of the claims. It is self-evident that you can

10: finger plate 11: gap groove 12: finger
13: thread hole 14: insertion groove
20: anchor plate 20a: contact plate 20b: extension plate
20c: buried plate 21: extended plate
22: buried bar
30: angle plate 30a: top plate 30b: side plate
31: fitting protrusion 32: support bar
33: confirmation home
40: pour part
50: drain plate 51: fitting plate 52: magnetic material

Claims (7)

In an integrated bridge expansion joint device installed on a bridge to prevent damage due to load to prevent damage during contraction and expansion of slabs,
The finger plate 10 is disposed on both sides spaced apart from each other to form a gap groove 11 in a pair on both sides, and fingers 12 intersecting each other are formed on one side of the inner side;
An anchor plate 20 disposed on the lower surface of the finger plate 10 at regular intervals and welded to the finger plate 10;
an angle plate 30 coupled to the inner surface of the anchor plate 20 so as to be in close contact with the lower surface of the finger plate 10 and disposed along the longitudinal direction on both sides of the gap groove 11;
It consists of; a pouring part 40 in which the mortar is poured so that the anchor plate 20 is embedded on the boundary between the upper surface of the finger plate 10 and the inner surface of the angle plate 30;
The finger plate 10 includes a threaded hole 13 formed between the anchor plates 20 through which mortar is introduced, and the mortar introduced into the threaded hole 13 is the upper end of the finger plate 10 . It is poured to match the surface, and the finger plate 10 and the pouring part 40 are made to be firmly adhered,
The anchor plate 20,
a contact plate 20a formed along the width direction of the finger plate 10 and welded to the lower surface of the finger plate 10;
an extension plate 20b protruding under the contact plate 20a and having a relatively narrower width than that of the contact plate 20a;
It protrudes under the extension plate 20b and is formed to have the same width as that of the contact plate 20a to form a buried plate 20c,
An integrated body that prevents damage by load, characterized in that a plurality of insertion grooves 14 are formed on the lower end surface of the finger plate 10 at regular intervals along the longitudinal direction and into which the anchor plate 20 is inserted. Expansion joints for bridges.
delete delete The method of claim 1,
an extension plate 21 protruding from both sides of the contact plate 20a and welded to the lower surface of the finger plate 10;
The extension plate 20b and the buried plate 20c protrude from both sides of the embedding bar 22 to be embedded in the pouring part 40. The integrated bridge preventing damage by load, characterized in that it further includes joint device. The method of claim 1,
A support bar 32 coupled to the angle plate 30, protruding between the anchor plate 20 and the anchor plate 20, and coupled to the inside of the poured pouring part 40, is further included. An all-in-one bridge expansion joint device that prevents damage due to load. The method of claim 1,
A fitting protrusion 31 is formed along the longitudinal direction on the inner surface of the angle plate 30,
An integrated bridge expansion joint device that prevents damage due to load, characterized in that the drain plate (50) is disposed at the lower end of the gap groove (11) and fixed to the fitting protrusion (31) at both ends. 7. The method of claim 6,
The fitting protrusion 31 is made of a material that is in contact with magnetism,
A plurality of magnetic bodies 52 are formed at both ends of the drain plate 50 in the longitudinal direction, and the fitting plate 51 is inserted into the fitting protrusion 31 and fixed by the magnetism of the magnetic body 52 . An expansion joint device for an integrated bridge that prevents damage due to load, characterized in that it further includes.

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