KR101999690B1 - Expansion joint apparatus having dust intrusion protection unit - Google Patents

Abstract

Disclosed is an expansion joint apparatus having a debris infiltration prevention unit. The expansion joint apparatus having a debris infiltration prevention unit according to an embodiment of the present invention comprises: a pair of finger plates disposed after being opposed to each other at an upper portion of a bridge, wherein a plurality of finger threads and finger grooves are repeatedly formed in a successive manner on each of the surfaces opposed to each other, the finger threads opposed to each other being aligned in an intersecting latch shape; and a debris infiltration prevention unit individually disposed at the finger grooves while being formed in a plate shape coming in contact with an inner wall of the finger grooves, arranged after being spaced from an upper plane of the finger plates towards a lower side, and elastically deformed to maintain the state of coming in contact with a lower plane of the finger threads while the finger threads are slidably moved in the finger grooves corresponding to the expansion and contraction of the bridge, thereby preventing debris from being infiltrated into a lower portion.

Description

TECHNICAL FIELD [0001] The present invention relates to an expansion joint device having a foreign matter inflow prevention unit,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expansion joint device having a foreign matter inflow prevention unit, and more particularly, to an expansion joint device having a foreign matter inflow prevention unit that can effectively block the inflow of foreign matter.

Generally, a bridge is composed of a plurality of piers installed on the ground and an upper plate installed on the upper part of the pier, and the upper plate is constructed in such a manner that a plurality of block structures are interconnected.

At this time, the block structure constituting the top plate is installed at a predetermined interval in the construction process because it expands and shrinks according to the temperature change. In addition, an expansion joint is installed at the connection portion between the top plates to prevent the infiltration of foreign matter while maintaining safe operation of the vehicle.

FIG. 1 is a perspective view showing a conventional expansion joint device, and FIG. 2 is a front view showing an expansion joint device according to FIG.

1 and 2, the expansion joint 200 according to the related art includes a base plate 1 installed on an upper portion of a block structure B, A pair of finger plates 210 and 210a fixed to the base plate 1 with bolts 270 and a waterproofing device 260 provided between the block structures.

The waterproofing device 260 includes a fixing member 262 inserted between the finger plates 210 and 210a and the base plate 1 and a fixing member 262 formed at one end of the fixing member 262 and bent downward, And a waterproof member 250 which is provided between the support members 230 in a stretchable manner.

The expansion joint device 200 according to the related art as described above performs the function of blocking and waterproofing the foreign matter introduced into the waterproof member 260 made of the corrugated member 240.

However, in the above-described conventional expansion joint device 200, when the height between the corrugated member 240 of the waterproof member 250 and the finger plates 210 and 210a is large and foreign matter is introduced into the expansion joint device 200 Even if the waterproofing member 250 does not flow into the waterproofing member 250, the waterproofing member 250 will not function as the expansion joint 200 as time elapses and the life span of the expansion jointing device 200 will be shortened there was.

FIG. 3 is a perspective view showing a foreign matter prevention finger joint structure according to Korean Patent No. 10-0755996, and FIG. 4 is a front view showing a foreign matter prevention finger joint structure according to FIG.

The applicant of the present invention has proposed a structure for preventing foreign matter fingers shown in FIG. 3 and FIG. 4 in order to solve the above problems.

3 and 4, the foreign matter preventive finger joint structure 100 according to the related art includes a finger groove and a finger mountain of a pair of finger joint plates 110, So as to cover the space between the finger grooves and the finger mountains so as to block foreign matter from entering.

However, the above-mentioned prior art finger joint structure 100 has a problem in that the overall structure is too complicated to manufacture, and the breakage rate is high due to the complexity of the structure. Particularly, since the foreign substance inflow prevention device 150 is directly connected to the finger joint plate 110, the foreign substance inflow prevention device 150 is broken and the finger joint plate 110 is broken. There is a problem in that a maintenance cost is required.

FIG. 5 is a perspective view showing a foreign matter-splash-type expansion joint device according to Korean Patent No. 10-0885810, and FIG. 6 is a front view showing a foreign matter-splash-type expansion joint device according to FIG.

In order to solve the above-mentioned problems, the applicant of the present invention has proposed an expansion joint device for blocking foreign matter as shown in FIG. 5 and FIG.

5 and 6, a foreign matter-splash-type expansion joint 50 according to a related art includes a pair of finger joint plates 10 having a finger mount 11 and a finger groove 12 formed therein, An auxiliary plate 20 formed to connect the finger joint plate 10 to the bridge and an auxiliary plate 20 formed at the lower end of the finger groove 12 of the finger joint plate 10 by a coupling member 31 And is formed so as to be in contact with the lower end of the finger mount 11 of the facing finger joint plate 10 and to be bent downward by a sliding action with the lower end of the finger mount 11 when the bridge is contracted, And an inflow prevention device (30). The hollow portion is provided with an elastic portion 33. The elastic portion 33 forms upper and lower fixing plates on the upper and lower sides of the spring and the spring And a bolt is formed in the lower fixing plate so that the elastic portion 33 can be fixedly coupled to the hollow portion of the foreign matter introduction preventing device 30. [

However, the above-described foreign matter inflow / outflow-type expansion joint device 50 is repeatedly used and the spring constituting the foreign matter inflow preventing device 30 is aged with time, The engagement force of the lower end of the finger plate 11 of the joint plate 10 is lowered and the engagement member 31 for coupling the foreign matter inflow prevention device 30 to the auxiliary plate 20 is released or engaged. There is a problem that it takes a lot of time.

[Patent Document 1] Korean Patent No. 10-0755996 [Patent Document 2] Korean Patent No. 10-0885810

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a flexible joint device having a foreign matter inflow prevention unit having a foreign matter inflow prevention unit for enhancing the contact force against the lower surface of a finger mountain, .

According to an aspect of the present invention, a plurality of finger arcs and a plurality of finger grooves are repeatedly formed on one surface of the bridge, the finger arcs and the plurality of finger grooves are repeatedly formed on the upper surface of the bridge, and the finger arcs are mutually staggered A pair of finger plates; And a plurality of finger grooves formed in the finger grooves and formed in a plate shape which is in close contact with the inner wall of the finger grooves and spaced downward from the upper surface of the finger plate, And a foreign matter inflow preventing unit which is elastically deformed so as to maintain a state of being in close contact with the lower surface of the finger mountain while being slidingly moved in the sliding direction, thereby preventing foreign matter from flowing into the lower part. have.

And the other end in the longitudinal direction is in close contact with the inner bottom surface of the finger groove, and both side portions in the width direction are in contact with the bottom surface of the finger groove, The other end of the elastic plate is disposed at a center portion in the height direction of the finger groove so that the other end of the elastic plate portion is spaced downward from the upper surface of the finger plate .

The elastic plate portion includes a plate-shaped steel plate elastically deformable; An elastically deformable coating layer surrounding the outer surface of the steel plate; And a wing extending in the horizontal direction at both side portions in the width direction of the coating layer located on the upper surface of the steel plate and closely contacting the inner side wall of the finger groove.

The coating layer and the blade portion may be made of a rubber material.

Wherein the coating layer and the wing portion are made of an ethylene vinyl acetate resin layer, an ethylene vinyl acetate / polyurethane composite resin layer, a polyurethane resin layer, an ethylene vinyl acetate / polyurethane composite resin layer and an ethylene vinyl acetate resin layer sequentially A multi-layered resin layer laminated on the substrate; And a polyurea / polyphenyl sulfone composite resin coating layer coated on the surface of the multi-layer resin layer.

Wherein the ethylene vinyl acetate / polyurethane composite resin layer is formed by foam-molding an ethylene vinyl acetate resin and a polyurethane resin at a ratio of 1: 0.5 to 2, and the polyurea / polyphenyl sulfone composite resin coating layer comprises polyurea 95 to 99.5 And 0.5 to 5% by weight of polyphenyl sulfone. The polyurea / polyphenyl sulfone composite resin coating layer may be coated on the surface of the multilayer resin layer to a thickness of 0.01 to 3 mm.

Wherein the foreign matter inflow prevention unit further includes a coupling block which is provided inside the finger groove and is disposed in close contact with an inner bottom surface of the finger groove and the steel plate is spaced upward from the lower surface of the finger plate, The coupling block may have a bolt hole penetrating the upper and lower portions thereof. When the coupling block is bolted to the upper portion of the bridge, the head of the bolt may be spaced downward from the upper surface of the finger plate.

And an elastic block provided inside the finger groove and disposed adjacent to the engagement block and elastically supporting the lower portion of the steel plate.

The elastic block may be formed such that an upper surface thereof is inclined so as to increase in thickness from the other end of the steel plate toward one end so as to increase an initial adhesion force to the lower surface of the finger mountain of the steel plate.

A base plate disposed at a lower portion of the pair of finger plates and installed at an upper portion of the bridge; An auxiliary plate having a horizontal plate provided between the finger plate and the base plate, and a vertical plate bent downward from the horizontal plate; And a pour-in rubber pad having a water-resistant coating layer formed on the surface of the vertical plate, both ends of which are connected to the vertical plate.

The water-resistant coating layer can be obtained by photopolymerization of a mixed solution comprising (i) a photocurable resin prepolymer obtained by reacting polyethylene glycol with methacryloyl chloride, (ii) a photopolymerization initiator, and (iii) a mulberry extract.

(I) 100 parts by weight of the photocurable resin prepolymer and 100 parts by weight of the photocurable resin prepolymer, (ii) the amount of the photocurable resin prepolymer is 100 parts by weight based on 100 parts by weight of the photocurable resin prepolymer, 0.5 to 1.5 parts by weight of a photopolymerization initiator, and (iii) 5 to 15 parts by weight of the extract of the mulberry extract.

The embodiment of the present invention is provided with a foreign matter inflow preventing unit which is arranged to be spaced downward from the upper surface of the finger plate and is resiliently deformed so as to maintain a state of tight contact with the lower surface of the finger mountain, It is possible to prevent the preventive unit from being damaged, and the maintenance cost can be prevented from being increased.

In addition, since the foreign matter inflow prevention unit according to the present embodiment is disposed in close contact with the inner wall of the finger groove without disturbing the foreign matter, inflow of the foreign matter can be effectively prevented, and sliding movement of the finger mountain due to foreign matter accumulation can be prevented.

In addition, since the foreign matter inflow prevention unit according to the present embodiment is formed in a plate shape, it is simple to manufacture and easy to install.

1 is a perspective view showing an expansion joint according to a prior art.
Fig. 2 is a front view showing the expansion joint according to Fig. 1;
3 is a perspective view showing a structure of a finger joint for preventing foreign matter according to Korean Patent No. 10-0755996.
Fig. 4 is a front view showing the structure of a foreign matter prevention finger joint according to Fig. 3;
5 is a perspective view showing a foreign matter inflow-blocking expansion joint device according to Korean Patent No. 10-0885810.
6 is a front view showing a contaminant-entraining type expansion joint device according to FIG.
7 is a plan view showing a telescopic joint device according to an embodiment of the present invention.
FIG. 8 is a cross-sectional view taken along line AA of FIG. 7, illustrating a telescopic joint according to an embodiment of the present invention.
9 is a perspective view illustrating a pair of finger plates and a foreign matter inflow prevention unit according to an embodiment of the present invention.
10 is a cross-sectional view showing a foreign matter inflow prevention unit according to an embodiment of the present invention.
11 is an enlarged view of part B of Fig. 10, which is a cross-sectional view showing an elastic block according to an embodiment of the present invention.
12 is an operational state diagram of an expansion joint according to an embodiment of the present invention.
FIG. 13 is a sectional view taken along the line DD of FIG. 12, illustrating an operational state of the expansion joint according to an embodiment of the present invention.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

FIG. 7 is a plan view of a telescopic joint apparatus according to an embodiment of the present invention, FIG. 8 is a cross-sectional view taken along line AA of FIG. 7 and is a sectional view showing a telescopic joint apparatus according to an embodiment of the present invention, 10 is a cross-sectional view illustrating a foreign matter inflow prevention unit according to an embodiment of the present invention, and FIG. 11 is a cross-sectional view illustrating a foreign matter inflow prevention unit according to an embodiment of the present invention, 1 is a cross-sectional view illustrating an elastic block according to an embodiment of the present invention.

7 to 11, an expansion joint device having a foreign matter inflow prevention unit according to an embodiment of the present invention includes a base plate 110 installed on an upper portion of a bridge C, A pair of finger plates 140 which are mutually opposed to each other and which are fixed to the base plate 110 by a first bolt B1 and in which a plurality of finger arcs 143 and finger grooves 141 are continuously formed repeatedly, An auxiliary plate 120 provided between the plate 140 and the base plate 110 and bent downward; a pouring rubber pad 130 having both ends connected to the auxiliary plate 120; 141, respectively.

The base plate 110 according to the present embodiment is installed on the bridge C and supports the auxiliary plate 120 and the pair of finger plates 140 installed on the upper surface.

The auxiliary plate 120 and the pair of finger plates 140 are sequentially bolted to the upper surface of the base plate 110 with the first bolt B1 while the base plate 110 is installed on the upper portion of the bridge C. do.

The auxiliary plate 120 according to the present embodiment is disposed between the base plate 110 and the finger plate 140. The auxiliary plate 120 is formed in a shape of a letter "A" composed of a horizontal plate 121 provided on the upper surface of the base plate 110 and a vertical plate 123 bent downward from the horizontal plate 121.

The both ends of the pouring rubber pads 130 are respectively joined to the ends of the vertical plates 123 of the auxiliary plate 120 arranged opposite to each other on the bridge C.

The water-absorbing rubber pad 130 drains water flowing from the upper portion of the bridge C, and a water-repellent coating layer (not shown) is formed on the surface of the water-absorbing rubber pad 130 to prevent the water- .

Hereinafter, the present invention will be described in more detail with reference to Examples and the like, but the scope and content of the present invention can not be construed to be limited or limited by the following Examples. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the present invention as set forth in the following claims. It is natural that it belongs to the claims.

Example

Example 1

3.4 g (3.4 mmol) of a polyethylene glycol having a molecular weight of 1,000 were placed in a well-dried 500 round bottom flask and 50 benzene was added and then completely dissolved under reflux in an oil bath at 60 ° C .

Then, 0.68 mL (7 mmol) of methacryloyl choloride was added, and 1 mL (7.2 mmol) of triethylamine was added, followed by reaction for 3 hours.

After the reaction was cooled to room temperature, triethylamine hydrochloride was removed by filtration, the reaction product was added dropwise to n-hexane and then dried in a vacuum oven at 40 to obtain an ester-based light-curable prepolymer .

100 parts by weight of the photopolymerizable resin prepolymer thus obtained and 1 part by weight of benzoin methyl ether as a photopolymerization initiator were injected in an amount sufficient to coat the dummy rubber pad 130 through a 5 mm nozzle fitted to the thermostatic chamber .

Then, the water-repellent coating layer was formed by irradiating light on the embedding rubber pad 130 for 10 minutes by using an ultraviolet lamp having a wavelength of 300 to 400 nm.

Example 2

100 parts by weight of a photo-curable resin prepolymer and 1 part by weight of benzoin methyl ether as a photopolymerization initiator were mixed instead of using a mixture of 100 parts by weight of a photo-curable resin prepolymer and 1 part by weight of benzoin methyl ether as a photopolymerization initiator, A water-resistant coating layer was formed in the same manner as in Preparation Example 1, except that a mixed solution obtained by further mixing 10 parts by weight of the municipal wax extract prepared below was used.

The mulberry stem was cut to a length of 5 to 10 cm, and the thus-cut mulberry stem, mulberry leaf and water were mixed to a weight ratio of 1: 1: 30. It was heated until the water was half of its original volume. The leaves and stems of mulberry leaves were removed and the extracts were filtered through a sieve.

Comparative Example 1

For the purpose of comparison, a padded rubber pad 130 having no water-resistant coating layer was used as it is.

Evaluation example

As a result, in the comparative example 1, the system according to the present invention was manufactured using the rubber pads 130 for embers, and it was found that after a long period of operation, no odor was detected for a considerable time after the operation, It was confirmed that the surrounding odor was microscopically detected and the degree of the odor gradually increased.

On the other hand, in the case of the water-permeable rubber pad 130 having the water-repellent coating layer formed in Example 1, the surrounding odor was not detected at all after about 1,000 hours of operation, but a minute crack generated from the inside of the water- Of the total population.

On the other hand, the surrounding padding 130 having the water-repellent coating layer formed in Example 2 was not detected at all after about 1,000 hours of operation as in the case of the padded rubber pad 130 of Example 1, It was confirmed that, unlike the padded rubber pad 130 of Example 1, no micro cracks generated from the inside of the padded rubber pad 130 were observed on the outer surface at all.

A plurality of finger arrays 143 and finger grooves 141 are continuously formed on one surface of the finger plate 140 according to the present embodiment. A pair of finger plates 140 are provided on the bridge C so as to face each other.

The pair of finger plates 140 are formed such that one side of the finger arcs 143 and the finger grooves 141 are repeatedly formed one after another and the opposite finger arcs 143 are inserted into the opposite finger grooves 141 Are arranged in the form of mutually staggered bolts. When the bridge C expands or contracts, the finger mount 143 is slidably moved in the finger grooves 141 provided opposite to each other.

The foreign matter inflow prevention unit 150 according to the present embodiment is formed in the inside of the finger grooves 141 of each of the pair of finger plates 140 and has a plate shape in which both side portions are in close contact with the inner wall of the finger grooves 141 .

The foreign matter inflow preventing unit 150 is elastically deformed so as to remain in contact with the lower surface of the fingertip 143 while the fingertip 143 slides in the finger groove 141 when the bridge C expands and contracts Thereby preventing foreign matter from entering the lower portion.

The foreign matter inflow prevention unit 150 is disposed downward from the upper surface of the finger plate 140. This can prevent the foreign matter inflow preventing unit 150 from being damaged by the vehicle or the like even when the foreign matter inflow preventing unit 150 is repeatedly used for a long time, and it is possible to prevent the maintenance cost from being increased.

Specifically, the foreign matter inflow prevention unit 150 is disposed along the longitudinal direction (X direction) of the finger groove 141, and one end in the longitudinal direction (X direction) is in close contact with the lower surface of the finger mount 143, And a plate-like elastic plate portion 151 whose other end is in close contact with the inner bottom surface of the finger groove 141 and both side portions in the width direction (Y direction) are in close contact with the inner side wall of the finger groove 141.

One end of the elastic plate portion 151 is elastically deformed to maintain a state in which it is in close contact with the lower surface of the finger mount 143. The other end of the elastic plate portion 151 is spaced downward from the upper surface of the finger plate 140 and disposed in the center portion of the finger groove 141 in the height direction (Z direction).

The foreign matter inflow prevention unit 150 according to the present embodiment is disposed in close contact with the inner bottom surface of the finger groove 141 and the other end of the elastic plate portion 151 is spaced upward from the lower surface of the finger plate 140 And a coupling block 158 coupled thereto. A bolt hole 159 penetrating the upper and lower portions is formed in the coupling block 158 and the head of the second bolt B2 is connected to the upper surface of the finger plate 140 when the coupling block 158 is bolted to the upper portion of the bridge. And are spaced apart from each other.

The second bolt B2 passes through the bolt hole 159 of the engaging block 158 while the other end of the elastic plate portion 151 is engaged with the center of the engaging block 158 as shown in Fig. And is coupled to the horizontal plate 121 and the base plate 110. At this time, the head of the second bolt B2 is spaced downward from the upper surface of the finger plate 140, thereby preventing the head of the second bolt B2 from being damaged by a vehicle or the like.

Since the elastic plate portion 151 is coupled to the horizontal plate 121 and the base plate 110 in a state where the elastic plate portion 151 is integrally coupled to the center of the coupling block 158, the elastic plate portion 151 can be easily installed Since the elastic plate portion 151 is disposed in the center portion of the finger groove 141 in the height direction (Z direction), it can be prevented from being damaged by a vehicle or the like.

9 and 10, the elastic plate portion 151 includes an elastically deformable plate-shaped steel plate 152, an elastically deformable cover layer 153 surrounding the outer surface of the steel plate 152, And wings 154 extending horizontally on both sides in the width direction of the coating layer 153 located on the upper surface of the finger 152 and closely contacting the inner side walls of the finger grooves 141. The coating layer 153 and the wing portion 154 may be integrally formed.

The steel plate 152 provided at the center of the elastic plate portion 151 may be formed in a plate shape of stainless steel having excellent elastic force and restoring force.

Since the steel plate 152 and the finger plate 140 can expand and contract according to the temperature change, both side portions of the steel plate 152 and the inner side walls of the finger grooves 141 should be spaced apart from each other by a predetermined distance.

Since the upper surface of the steel plate 152 and the lower surface of the finger mountain 143 are kept in close contact with each other, noise due to vibration during vehicle traveling may be generated. When the inner side walls are in close contact with each other, noise due to friction between the steel plate 152 and the inner side wall of the finger groove 141 may be generated when the steel plate 152 is elastically deformed in the finger groove 141 have. The elastic deformation of the steel plate 152 due to the friction between the steel plate 152 and the inner side wall of the finger groove 141 is limited and the sliding movement of the finger mount 143 inside the finger groove 141 It can be interrupted. Therefore, both side portions of the steel plate 152 and the inner side walls of the finger grooves 141 are spaced apart from each other by a predetermined distance.

Since the elastic plate portion 151 prevents foreign matter from flowing into the lower portion of the steel plate 152, the covering layer 153 surrounding the outer surface of the steel plate 152 is provided in the present embodiment, Wing portions 154 extending horizontally at both sides in the width direction of the coating layer 153 and closely contacting the inner side walls of the finger grooves 141 are provided.

(Y direction) width of the coating layer 153 located on the upper surface of the steel plate 152 and wings extending from both sides in the width direction (Y direction) of the coating layer 153 located on the upper surface of the steel plate 152 154 in the width direction (Y direction) corresponds to the width direction (Y direction) width of the finger groove 141.

Since the wings 154 extending from the coating layer 153 are in close contact with the inner sidewalls of the finger grooves 141 as described above, the generation of noise due to friction between the steel plates 152 and the inner sidewalls of the finger grooves 141 is prevented And the sliding movement of the finger mount 143 in the finger groove 141 can be prevented from being hindered. Further, since the wing portion 154 extending from the coating layer 153 is in close contact with the inner side wall of the finger groove 141, it is possible to prevent foreign matter from flowing into the lower portion. Further, since the cover layer 153 covers the outer surface of the steel plate 152, it is possible to prevent the noise generated by the vibration due to vehicle progress and to prevent the steel plate 152 from being exposed to the outside for a long time, It is possible to prevent the rust that may be generated in the plate 152.

The coating layer 153 may be firmly bonded to the outer surface of the steel plate 152 after the bonding agent is applied to the steel plate 152. In this embodiment, Either of them can be used.

On the other hand, the coating layer 153 and the wing portion 154 are elastically deformed together with the steel plate 152. Therefore, it is preferable that the coating layer 153 and the wing portion 154 are made of a material having the same elasticity and restoring force as the steel plate 152.

The coating layer 153 and the wing portion 154 may be formed of a rubber material having the same elasticity and restoring force as the steel plate 152.

10, the coating layer 153 and the wing portion 154 are formed of a multi-layered resin layer 155 and a multi-layered resin layer 155 so that the coating layer 153 and the wing portion 154 have the same elastic force and restoring force as the steel plate 152, And a polyurea / polyphenyl sulfone composite resin coating layer 156 coated on the surface of the multilayer resin layer 155.

Specifically, the multilayer resin layer 155 includes an ethylene vinyl acetate resin layer 155a, an ethylene vinyl acetate / polyurethane composite resin layer 155b, a polyurethane resin layer 155c, an ethylene vinyl acetate / The stratum 155b and the ethylene vinyl acetate resin layer 155a are sequentially stacked in the height direction (Z direction). Here, the ethylene vinyl acetate / polyurethane composite resin layer 155b is foam-molded by mixing ethylene vinyl acetate resin and polyurethane resin at a ratio of 1: 0.5 to 2.

When the coating layer 153 and the wing portion 154 are made of ethylene vinyl acetate, there is a problem that the elongation and durability are lowered. When the coating layer 153 and the wing portion 154 are made of polyurethane, the restoring force is low and the restoration speed is slow. The applicant of the present invention has found that the coating layer 153 and the wing portion 154 are formed of the multilayer resin layer 155 having the multilayer structure as described above and the coating layer 153 composed of the multilayer resin layer 155, (154) was excellent in durability, and it was confirmed that the elongation and restitution force were maintained at 95% or more even with repeated cycling experiments of 1000 times or more and had excellent adhesion.

On the other hand, a plurality of through holes (not shown) having a diameter of 1 to 5 mm may be formed in the multi-layer resin layer 155 in the height direction (Z direction). This is because when the multi-layer resin layer 155 is elastically deformed downward as the fingertip 143 slides toward the inner bottom surface of the finger groove 141 at the time of contraction of the bridge C, And the inner side wall of the finger groove 141 is pressed, sliding movement of the finger mount 143 may be interrupted. Therefore, in the present embodiment, a plurality of through holes are formed in the multi-layer resin layer 155 The sliding motion of the finger mount 143 due to the elastic deformation of the multi-layered resin layer 155 is smooth.

Also, the polyurea / polyphenyl sulfone composite resin coating layer 156 according to the present embodiment may be foam-molded by blending 95 to 99.5% by weight of polyurea and 0.5 to 5% by weight of polyphenyl sulfone. The polyurea / polyphenyl sulfone composite resin coating layer 156 may be coated on the surface of the multi-layer resin layer 155 to a thickness of 0.01 to 3 mm.

The polyurea / polyphenyl sulfone composite resin coating layer 156 improves the chemical resistance and waterproof property of the coating layer 153 and the wing portion 154. Particularly, the polyurea / polyphenyl sulfone composite resin coating layer 156 smoothly slides when the coating layer 153 and the wing portion 154 slide downward while closely contacting the lower surface of the finger mountain 143 Respectively. If the content of the polyphenyl sulfone is less than the above range, sliding of the finger acid 143 is difficult to smoothly smoothly. If the content of the polyphenyl sulfone exceeds the above range, the surface hardness increases and the adhesion force to the lower surface of the finger acid 143 is lowered. The effect may be deteriorated.

The elastic plate portion 151 is spaced upward from the lower surface of the finger plate 140 when the coupling block 158 to which the elastic plate portion 151 is coupled is bolted to the upper portion of the bridge.

Therefore, in order to support the lower portion of the elastic plate portion 151 adjacent to the coupling block 158 and to initially increase the adhesion to the lower surface of the finger mount 143 at one end of the elastic plate portion 151, The expansion joint device 100 having the foreign matter inflow prevention unit 150 according to one embodiment of the present invention is provided inside the finger groove 141 and is disposed adjacent to the engagement block 158, And an elastic block 170 for elastically supporting the other end lower surface.

11 (a), in order to increase the initial adhesion force of one end of the elastic plate portion 151 to the lower surface of the finger mount 143, the elastic block 170 is provided on the elastic plate portion 151 And the upper surface is inclined so that the thickness increases from the other end toward the one end.

11 (b), the other end of the elastic plate portion 151 is seated on the upper surface of the elastic block 170 and one end of the elastic plate portion 151 is brought into close contact with the lower surface of the finger mount 143, The elastic plate portion 170 can be attached to the lower surface of the finger mount 143 in an adhering force.

Also, the elastic block 170 according to the present embodiment may be made of a rubber material, but the scope of the present invention is not limited thereto. And it can be made of various materials as long as it supports the other end bottom surface.

The operation of the expansion joint device having the foreign matter inflow prevention unit according to the embodiment of the present invention will now be described.

FIG. 12 is an operational state view of an expansion joint apparatus according to an embodiment of the present invention, and FIG. 13 is a sectional view taken on line D-D of FIG. 12, illustrating an operational state of an expansion joint apparatus according to an embodiment of the present invention.

A pair of finger plates 140 are provided and installed on the bridge C and the elastic plate part 150 is provided inside the finger grooves 141 and is in contact with the lower surface of the finger mount 143 And is relatively slidingly moved relative to the finger mount 143 while maintaining a state of being in close contact with the lower surface of the finger mount 143. [

12 and 13, when the bridge C is contracted, the pair of finger plates 140 are moved in mutually approaching directions, and the finger arcs 143 are moved in the opposite directions 141). At this time, the elastic plate portion 151 is elastically deformed further downward while maintaining a state in which it is in close contact with the lower surface of the finger mount 143 as the finger mount 143 moves. Since both side portions of the elastic plate portion 151 are in close contact with the inner side wall of the finger groove 141 and the upper surface thereof is in contact with the lower surface of the finger mountain 143, foreign matter can be effectively prevented from flowing into the lower portion of the finger groove 141.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

100: expansion joint 110: base plate
120: Auxiliary plate 130: Drains rubber pad
140: Finger plate 141: Finger groove
143: Finger mount 150: Foreign body inflow prevention unit
151: Elastic plate part 152: Steel plate
153: coating layer 158: bonding block
170: Elastic block

Claims (12)

A pair of finger plates arranged to face each other on an upper portion of a bridge, wherein a plurality of finger arcs and finger grooves are continuously formed on one surface of the bridge, the finger arcs being mutually opposed to each other;
The finger grooves being elongated along the longitudinal direction of the finger grooves, one end in the longitudinal direction being in close contact with the lower surface of the finger mountain, the other end in the longitudinal direction being disposed in the center of the height direction of the finger grooves, And an engaging block provided inside the finger groove and having the other end of the elastic plate portion coupled to a center portion to prevent foreign matter from flowing into the lower portion, Prevention unit; And
Wherein the elastic plate portion is provided inside the finger groove and is disposed adjacent to the engaging block and has an upper surface and a lower surface to increase the thickness of the elastic plate portion from the other end of the elastic plate portion toward one end, And an elastic block formed to be inclined and elastically supporting a lower portion of the elastic plate portion. The method according to claim 1,
The elastic plate portion
An elastically deformable plate-shaped steel plate;
An elastically deformable coating layer surrounding the outer surface of the steel plate; And
And a wing portion extending in a horizontal direction at both side portions in the width direction of the coating layer located on the upper surface of the steel plate and closely contacting the inner sidewalls of the finger grooves. 3. The method of claim 2,
Wherein the cover layer and the wing portion are made of a rubber material. The method according to claim 1,
And a foreign matter inflow preventing unit in which a bolt hole penetrating the upper and lower portions is formed in the joint block and the head of the bolt is spaced downward from the upper surface of the finger plate when the joint block is bolted to an upper portion of the bridge, Joints. The method according to claim 1,
A base plate disposed at a lower portion of the pair of finger plates and installed at an upper portion of the bridge;
An auxiliary plate having a horizontal plate provided between the finger plate and the base plate, and a vertical plate bent downward from the horizontal plate; And
And a foreign matter infiltration preventing unit including a waterproofing rubber pad having a waterproof coating layer formed on both sides thereof, the waterproofing coating layer being coupled to both ends of the vertical plate. delete delete delete delete delete delete delete

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