KR20160009492A - Connecting apparatus for expansion joint of bridge and method connecting for expansion joint of bridge therof - Google Patents

Abstract

A connection apparatus for an expansion joint of a bridge is disclosed. The connection apparatus for an expansion joint of a bridge, which is to connect open type expansion joint devices for a bridge to each other in a longitudinal direction, comprises: a lower mold which is installed in a lower frame and receives a first heating unit therein; a pressing member which is installed in an upper frame; an upper mold which is coupled to the bottom end of the pressing member and receives a second heating unit therein; and a support frame which supports the expansion joint devices to be connected to each other in a horizontal state and has rollers to move the expansion joint devices in a horizontal direction. According to the present invention, the connection apparatus continuously connects the expansion joint devices for a bridge to each other and maintains the waterproofing of the connection part of the expansion joint devices.

Description

TECHNICAL FIELD [0001] The present invention relates to an expansion joint for a bridge,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic joint for a bridge and a telescopic joint for a bridge using the telescopic joint. More particularly, the telescopic telescopic joint for a bridge can be rapidly and easily connected continuously, The present invention relates to an expansion joint connection device for a bridge capable of preventing water leakage and preventing water leakage, and a connection method for a flexible joint for a bridge using the same.

Generally, the top plate of the bridge expands or contracts due to temperature changes and the like. Therefore, the top plate of the bridge constructed over a certain length is installed at a distance from the neighboring top plate in consideration of the contraction and expansion of the top plate. Between the roofs of such bridges, a telescopic joint is installed for the purpose of reducing noise, improving ride quality, and preventing foreign matter or rainwater from flowing between the top plates.

Such expansion joint devices include NB type, TF type, monocell type, new monocell type, and finger joint. One of them is a finger joint. This is because a plurality of fingers and grooved fittings formed in a wave-like shape are opposed to each other and each finger on one side is inserted into each groove on the other side so that even if the bridge top plate is contracted and the gap between the top plates becomes large, So that it can pass through.

Such a telescoping joint device for bridges is a conventional telescoping joint device for a bridge according to the related art, which is arranged in the longitudinal direction between the upper plates along the width direction of the bridge top plate, Korean Utility Model Registration No. 20-0167591 (public announcement: Feb. 1, 2000).

Such an expansion joint device for bridges comprises a pair of main plate members facing each other with a predetermined space between a pair of bridge top plates mutually connected to each other and a main plate member extending laterally in the longitudinal direction from the main plate member, And a plurality of anchor portions each of which is embedded in each of the pair of main plates, wherein each of the plurality of anchor portions includes a vertical portion which is respectively adhered to the opposite inner wall surfaces of the main plate members, an upper horizontal portion and a lower horizontal portion which interconnect the vertical portions at upper and lower ends, A first rubber member having at least one wrinkle portion formed in each of the lateral sections, and a second rubber member integrally fixed to the end portions of the pair of main plate members and being engaged with each other between the other main plate members Respectively.

Such an expansion joint device is constructed to have a predetermined length (generally 1.8 m) as shown in FIG. 8 and to be connected to each other so as to match the width of the bridge at the construction site. That is, the connecting pieces provided at the respective end regions of the supporting portions are fastened with bolts and nuts, and the two expansion joints are connected to each other.

However, when the two expansion joints are continuously connected in the longitudinal direction as described above, there is a problem in that the connecting portions of the expansion joint devices are not closely contacted and rainwater flows in.

In this way, when the rainwater flows into the joint between the joints of the expansion joints, the bridge of the bridge can be corroded and damaged.

. Korean Registered Utility Model No. 20-0167591 (Notice: February 01, 2000)

It is an object of the present invention to provide an expansion joint for a bridge capable of continuously and easily connecting a stretch joint device for a bridge made of a certain length to a length equal to the width of an upper plate of the bridge, Thereby providing a connecting device.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to at least partially solve the problems in the conventional arts. It can be understood.

The above object is achieved according to the present invention by connecting an expansion joint for open bridges to each other in the longitudinal direction, comprising: a lower mold installed in a lower frame with a first heating means installed therein; A pressing member penetrating the upper frame installed at a predetermined distance from the lower frame by the side frames; An upper mold coupled to a lower end of the pressing member so as to correspond to the lower mold in a space formed between the lower frame and the upper frame with a second heating means installed therein; And a support frame provided on both sides of the lower frame, the support rollers having moving rollers for horizontally supporting the expansion joint devices to be connected to each other and horizontally moving the lower mold, And the pressing member is composed of a screw rod having a handle or a pressurizing cylinder which operates the piston rod by hydraulic pressure or pneumatic pressure , The vertical members of each elastic joint device from which the rubber is removed and the end portions of the finger members are butt welded to each other, and then the welded joints are positioned between the upper mold and the lower mold, The upper mold and the lower mold are moved to the vulcanization-bonding rubber By pressing with heating is achieved by means of the bridge expansion joint device for connection, it characterized in that the interception of the connection to occur vulcanization bonding.

The above object can be achieved according to the present invention by a method of manufacturing a telescopic joint, comprising the steps of: a) making rubber so as not to adhere to the inner surface of the end portion of the vertical member and the finger member when constructing the telescopic joints, Removing a portion of the rubber adhered to the base material; b) welding the ends of the finger members to the ends of the vertical members of the expansion joints where the rubber is not adhered or rubber-removed by the step a), and then joining both of the expansion joints by welding; c) placing a connecting portion of the expansion joints coupled by the step b) between the upper mold and the lower mold of the expansion joint device for a bridge according to the first aspect and disposing the vulcanization adhesive rubber on the connecting portion; d) When the rubber for vulcanizing and bonding is disposed on the connecting portion, the pressing member of the elastic joint device for bridge is operated while heating the first heating means in the lower mold and the second heating means in the upper mold , Vulcanizing and bonding the vulcanization-bonding rubber to the inner surface of the connecting portion by heating and pressing the vulcanization-bonding rubber to the connecting portion by using the upper mold, and waterproofing the connecting portion by connecting the rubber of the expansion jointing devices step; e) When another expansion joint device is additionally connected to the end of the expansion joint device already connected to prevent leakage by way of the step d), the end of the expansion joint device to be connected to the outer end surface of the already- And a step of joining the fastening brackets to each other by fastening the fastening brackets to each other after arranging the fastening brackets on the outer side surface and placing the waterproof coupling between the two expansion joint devices, ; And a metal plate made of vulcanized rubber materials each having a predetermined thickness and formed of two to four pieces, each of which is formed on each of both surfaces of the metal plate and has insertion protrusions inserted into the inside of the expansion joint device to be connected to each other. An inner vulcanized rubber material disposed between the metal plates; And a plurality of vulcanized rubber members provided on the outer surface of the metal plates, the insertion protrusions being inserted into the respective expansion joints to be connected to each other.

According to the present invention, it is possible not only to connect the expansion joints for bridges manufactured by a certain standard length in the longitudinal direction so as to match the width of the upper plate of the bridge but also to connect the connecting rubber of the expansion joints connected to each other by vulcanization adhesion It is possible to provide an effect that the watertightness of the connection portion can be maintained.

Further, since the expansion joint devices for bridges can be connected quickly and easily, it is possible to quickly and easily perform the operation of connecting the expansion joint devices to each other so as to match the width of the upper plate of the bridge, .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view showing a telescopic joint device for a bridge according to a first embodiment of the present invention; FIG.
FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 for explaining the operating state of the expansion joint device for bridges shown in FIG.
3 is a sectional view taken along the line BB of Fig. 1 for explaining the operating state of the expansion joint device for bridges shown in Fig.
4 is a plan view showing the expansion joint device for bridges shown in FIG.
FIG. 5 is a perspective view for explaining a method of connecting on a site by using a waterproof coupling when another expansion joint is further connected to the expansion joint connected to the expansion joint device for a bridge according to the invention.
Fig. 6 is a perspective view showing another embodiment of the waterproof coupling shown in Fig. 5. Fig.
7 is a schematic view for explaining construction of a telescopic joint device connected using a telescopic joint device for bridges according to the present invention.
8 is a schematic view for explaining the construction of the expansion joint device according to the prior art.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.

1 is a partially cutaway perspective view showing a telescopic joint device for a bridge according to a first embodiment of the present invention, and FIG. 2 is a perspective view of the telescopic joint device for a bridge shown in FIG. 1, FIG. 3 is a cross-sectional view taken along the line BB of FIG. 1 for explaining the operation state of the expansion joint device for bridges shown in FIG. 1. FIG. 4 is a plan view showing the expansion joint device for bridges shown in FIG.

As shown in FIGS. 1 to 4, the expansion joint device for bridges according to the present invention is for connecting the expansion joints 100 for an open bridge to each other in the longitudinal direction, and the first heating means 52 A lower mold 50 mounted on the lower frame 10 and an upper frame 30 installed at a predetermined distance from the lower frame 10 by the side frames 20, Which is coupled to the lower end of the pressing member 60 so as to correspond to the lower mold 50 in a space formed between the lower frame 10 and the upper frame 30 by the second heating means 72, And a mold (70).

The first heating means 52 and the second heating means 72 are made of heat wire or the like.

Such a flexible joint connection device for bridges is constructed such that the rubber bonded to the ends of the vertical member 110 and the finger member 120 among the rubber member 140 vulcanized and bonded to the vertical member 110 and the finger member 120 is removed The connecting parts 300 connected to each other by butting welding are connected to the upper mold 70 and the lower mold 70 by connecting the vertical members 110 of the respective expansion joints 100 and the ends of the finger members 120, And the upper mold 70 and the lower mold 50 are joined to each other by vulcanization and bonding rubber (for example, 200 are heated while being heated to vulcanize and adhere so that the connection portion 300 is waterproofed.

This will be described more specifically.

The expansion joint device for bridges according to the present invention is configured such that a work space is formed between the upper and lower frames 10 and 30 by the lower frame 10, the pair of side frames 20 and the upper frame 30 And a frame portion.

On both sides of the lower frame 10, a supporting frame 40 having supporting rollers 42 for horizontally supporting the telescopic joints 100 to be connected to each other and moving them in the horizontal direction, as shown in FIG. 1, Respectively. The telescopic joints 100 connected to each other by the support frame 40 can be stably moved in a horizontal state, so that the connection operation can be performed stably, quickly, and easily. Particularly, the operation of welding and joining the vertical member 110 of the expansion joint apparatuses 100 manufactured with the vulcanized and adhered rubber 140 removed or removed with the fingers 120 by the butt welding is performed by the support frame 40 and then move to the work space between the upper and lower frames 10, 30 to perform the waterproofing process.

The work space between the upper and lower frames 10 and 30 is formed by connecting the vulcanized and adhered rubber 140 of the two expansion joints 100 with the rubber 200 for vulcanization and bonding, So that the waterproofing of the connection portion 300 welded with the butt welded portion is performed.

The lower mold 50 is installed in a mounting portion 12 formed at the center of the lower frame 10 so as to protrude more than the surface of the lower frame 10. This lower mold 50 is an open- 1 and 2 have protrusions for supporting the upper portion of the vulcanized and adhered rubber 140 so as to be waterproof while elastically connecting between the both finger members 120 of the elastic member 100. That is, Although it is shown that the upper surface of the telescopic joint 100 is seated on the upper surface of the lower frame 10 after reversing the joint 100, The portion where the metal mold 50 is supported corresponds to the upper surface of the concave shape expansion joint 100. In other words, the upper portion is concave so as to form concave rainwater guide grooves between the fingers 120, The guide portion 142 is formed. Therefore, the lower mold 50 is convexly formed to form the concave rainwater guide portion 142, and a predetermined length, for example, a portion where the vulcanized rubber 140 is removed, Is preferably formed to be equal to or longer than the length of the first electrode.

The upper mold 70 has a concave groove contrary to the above-described lower mold 50 so as to be coupled to the lower end of the pressing member 60. The upper mold 70 has a concave upper portion and a lower convex (Upper portion in FIG. 2) of the rainwater guiding portion 142 in the form of a rainwater. That is, the lower mold 50 of the convex shape and the upper mold 70 of the concave shape are heated by pressing the vulcanization-bonding rubber 200 therebetween to concave the rainwater guiding portion 142 between the both finger members 120 .

A first heating means 52 for heating the rubber 200 for vulcanizing and bonding is provided in the lower mold 50 and a second heating means 52 for heating the rubber 200 for vulcanizing and bonding is provided in the upper mold 70. [ 2 heating means 72 is installed.

When the upper and lower molds 70 and 50 press the vulcanization-bonding rubber 200, the first and second heating means 52 and 72 heat the vulcanization-bonding rubber 200 So that the adhesion between the finger members 120 on both sides and the inner surface of the vertical member 110 and the vulcanized rubber 140 is achieved.

The pressing member 60 is for moving the upper mold 70 in the direction of the lower mold 50 so as to heat and press the vulcanizing and bonding rubber 200. As shown in Figs. 1 and 2, And a screw shaft 64 provided with a screw 62. [ Therefore, the screw rod 64 is moved upward and downward with reference to Fig. 2 by the forward or reverse rotation of the handle 62. [

At this time, the pressing member 60 is not shown in the drawing, but may be a pressurizing cylinder that operates the piston rod by hydraulic pressure or pneumatic pressure.

A method of connecting the expansion joint devices 100 to the expansion joint device for bridges using the thus configured expansion joint device for bridges will now be described.

Before explaining the connection method, since the length of a commonly used expansion joint device 100 is 1.8 m, when the expansion joint devices 100 having such a length are connected in the longitudinal direction and connected at 3.6 m, And they are connected to each other by using the expansion joint device for a bridge according to the invention. However, the present invention is not limited to this, and may be applied to a case where a plurality of expansion joints 100 having various lengths are connected to a single or a plurality of joints.

That is, as shown in FIG. 8, the expansion joint apparatus 100 having a length of 1.8 m is connected to the above-mentioned expansion joint connection apparatus to make a length of 3.6 m, 100) are connected to each other in the field so as to fit the width of the bridge, and the expansion joints 100 having a length of 1.8 m are connected to each other at the expansion joint manufacturing factory or construction site.

a) Step

The vulcanization adhesive rubber 140 may not be adhered to the inner surfaces of the end portions of the vertical members 110 and the finger members 120 when the stretch joint device 100 is manufactured, ) In this case, an operation is performed to partially remove the rubber adhered to the inner surface of the vertical member 110 and the end portion of the finger member 120, respectively.

In this work, when the two expansion joints 100 of the structure in which the rubber is vulcanized and adhered so as to be elastically stretchable between the finger members 120 are connected to each other like the New Monocell type, When the finger member 120 and the end of the vertical member 110 and the other end of the finger member 120 of the sound field and the end of the vertical member 110 are brought into contact with each other after welding, This is an important task for preventing the rubber 140 from being burned.

Therefore, as described above, when the expansion joint 100 is manufactured by the vulcanization bonding method, the rubber 140 is vulcanized and adhered to a portion of each end of the finger member 120 and a portion of each end of the vertical member 110 . At this time, a portion of each end of the finger member 120 and a portion of each end of the vertical member 110 mean between about 10 cm and 20 cm. That is, if the vulcanized and adhered rubber 140 is not vulcanized and adhered at a distance of 10 cm to 20 cm from each end, or if the vulcanized and adhered rubber 140 is already removed .

b) Step

The expansion joint 100 (100) in which the rubber 140 for vulcanizing and bonding is not adhered or the rubber 140 for vulcanization and bonding at a portion of the end of the finger member 120 and the vertical member 110 is removed by the above- Of the vertical member 110 and the end of the finger member 120 are welded to each other to connect and connect the two expansion joints 100. [ At this time, since the rubber 140 for vulcanizing and bonding is not attached to the abutting region of the vertical member 110 to be welded and the finger member 120 or the attached rubber 140 for vulcanizing and bonding is removed The vulcanization-bonding rubber 140 is prevented from being burned by the welding operation.

When the step b) is performed, a separate welding workbench may be used to maintain the horizontal joints of the two expansion joints 100 at the same height, or may be placed on the support frame 40 shown in Fig. 1, It can be connected by welding. That is, the support frame 40 can be used as a welding workbench.

When the butt welding operation is performed, the welded portion is subjected to a surface treatment with a grinder or the like.

c) Step

The connecting portion 300 of the expansion joints 100 coupled to each other by the above-described step b) is positioned between the upper mold 70 and the lower mold 50 of the above-described flexible joint for bridges, 300, the vulcanization-bonding rubber 200 is placed.

That is, as shown in FIGS. 1 and 2, the telescopic joint 100 coupled to each other by facing welding is turned upside down to be seated on the upper surface of the lower frame 10 and the support frame 40, And the expansion joint device 100 is disposed so as to be positioned in the mold 50. [ Then, a rubber-like vulcanizing and bonding rubber 200 having a predetermined thickness is placed inside the connecting portion 300.

The vulcanization-bonding rubber 200 is vulcanized and adhered to the inner surface of the connecting portion 300, that is, to the inner surface of the finger member 120 and the vertical member 110, 140 formed between the two finger members 120 and to form a "V" type concave rainwater guide portion 142 between the two finger members 120.

At this time, an adhesive may be applied to both the fingers 120 and the vertical member 110 to be vulcanized and bonded to the vulcanization-bonding rubber 200.

d) Step

The lower mold 500 is located at the lower part of the connection part 300 and the upper mold 70 is located at the upper part of the connection part 300. The upper mold 70 is located between the inner side surfaces of the connection part 300, The first heating means 52 embedded in the lower mold 50 and the second heating means 72 installed in the upper mold 70 are disposed on the inner surface of the upper mold 110, The pressure member 60 is lowered and operated while generating heat.

When the pressing member 60 is lowered, the upper mold 70 is lowered, and the vulcanized and adhered rubber 200 disposed on the connecting portion 300 is heated and pressed. At this time, the lower mold 50 supports the vulcanization and adhesion rubber 200 to which the upper mold 70 presses.

The lower mold 50 is positioned at the lower portion of the connecting portion 300 (substantially between the two fingers forming the rainwater guiding portion), the upper mold 70 is lowered by the pressing member 60, The rubber 200 for vulcanizing and bonding is vulcanized and bonded to the inner wall of the connecting portion 300, that is, the inner surface of both the vertical members 110, so that the two rubber- Bonded to the vulcanized and adhered rubbers 140 of the apparatus 100 to be integrated and vulcanized and adhered to both the finger members 120 as shown in Fig.

That is, the vulcanization-bonding rubber 200 is vulcanized and adhered to the region where the rubber 140 adhered to the ends of both the expansion joint devices 100 is removed, And a concave rainwater guide portion 142 is formed between the upper and lower molds 70 and 50 while being vulcanized and bonded to both the finger members 120. [

In this process, both the expansion joints 100 are firmly connected to each other, and the vulcanization-bonding rubber 200 is vulcanized and bonded to the vertical member 110 of the connection portion 300 and the finger member 120, It is possible to prevent rainwater from flowing into the butt joint portion (welding portion) of the expansion joint device 100, that is, the connection portion 300. That is, the connection portion 300 is waterproofed.

When the operation of vulcanizing and bonding the vulcanized and adhered rubber 200 to the connecting portion 300 is completed by the above-described process, the pressing member 60 is raised to raise the upper mold 70.

Then, the expansion joint 100 connected to each other to be waterproof is horizontally moved to the loading site or moved to the construction site.

The construction of the expansion joint device 100 is improved by connecting the already constructed stretch joint devices 100 in the longitudinal direction so as to correspond to the width of the upper plate of the bridge. In particular, compared to the bolt tightening method using the coupling, The performance can be greatly improved.

On the other hand, when the expansion joint devices 100 connected to each other by the above-described expansion joint device for bridges are moved to a construction site, the length of the expansion joint devices 100 connected to each other and the width If the total length of the expansion joints 100 connected to each other or connected to each other is 3.6 m and the expansion joints 100 are connected to each other in the field, the waterproof coupling 400 is used as shown in FIG. 5 And connect them to each other. This will be described in detail.

5 is a view for explaining a method of connecting a stretch joint device connected to a telescopic joint device for bridges according to the present invention to another telescopic joint device using a waterproof coupling It is a perspective view.

That is, as shown in FIG. 7, another expansion joint device 100A is further connected to the end of the expansion joint device 100, which is already connected with a length of 3.6 m, , A fastening bracket 111 is provided on the outer surface of the end portion of the expansion joint device 100A to be connected to the outer end surface of the end portion of the expansion joint device 100 already connected and waterproofing is provided between the two expansion joint devices 100, After the coupling 400 is positioned, the fastening brackets 111 are fastened to each other with the bolts 410.

The waterproof coupling 400 includes a metal plate 420 having a predetermined thickness and insertion protrusions 440 which are provided on both surfaces of the metal plate 420 and are inserted into the expansion joints 100 and 100A to be connected to each other, Are formed on the outer circumferential surface of the vulcanized rubber member 430, respectively. That is, a structure in which a vulcanized rubber material 430 is adhered to both surfaces of the metal plate 420 with a predetermined thickness is formed on the outer surface of the vulcanized rubber material 430, and the insertion protrusions 440 are formed in opposite directions As shown in Fig. The shape of the waterproof coupling 400 is formed to be the same as the shape of the end of the expansion joint 100 or 100A including the fastening bracket 111 as shown in FIG. The shape of the waterproof rubber part 190 is formed to be the same as the shape of the waterproof rubber part 190 so as to be inserted into the inside of the waterproof rubber part 190 connecting the vertical member 110 and the finger member 120 in the joint devices 100 and 100A.

Meanwhile, the waterproof coupling 400 may be configured as shown in FIG.

The waterproof coupling 400 according to another embodiment has the waterproof coupling 400 of the above embodiment except that the two metal plates 420 are provided and the inner vulcanized rubber material 430A is disposed between the two metal plates 420. [ Ring 400. At this time, the metal plates 420 may be formed of three pieces, the inner vulcanized rubber material 430A may be composed of two pieces, or more.

The vulcanized rubber material 430 and the inner vulcanized rubber material 430A are vulcanized when heat and pressure are applied to improve various performances including the adhesive strength, and the carbon fibers may be contained at a predetermined ratio. In other words, the vulcanized rubber material 430 can be manufactured by adding carbon fiber at about 0.5 to 10% by weight in the production of the vulcanized rubber material 430.

When the waterproof coupling 400 is positioned between the two expansion joints 100 and 100A and the fastening brackets 111 are fastened to each other with the bolts 410, 400 vulcanized rubber material 430 and inner vulcanized rubber material 430A can be vulcanized and bonded to the surface of the metal plate 420 and the fastening bracket 111. [ Since both of the insertion protrusions 440 are inserted into the waterproof rubber part 190 of the expansion joints 100 and 100A of both the joints 100 and 100A, it is possible to easily connect the two expansion joints 100 and 100A, Waterproof structure.

The present invention can be applied to an NB type, a TF type, a monocell type, and a new monocell type.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.

10: lower frame 12: installation part
20: side frame 30: upper frame
40: support frame 42:
50: lower mold 52: first heating means
60: pressing member 70: upper mold
72: second heating means
100, 100A: expansion joint device 110: vertical member
111: Fastening bracket
120: finger member 140: rubber vulcanized and adhered rubber
142: Rainwater guide part 190: Waterproof rubber part
200: Rubber for vulcanization and adhesion 300: Connection
400: waterproof coupling 410: fastening bolt
420: metal plate 430: vulcanized rubber member
430A: Inner vulcanizing rubber member 440: Insertion projection

Claims (2)

The present invention relates to an expansion joint for an open bridge,
A lower mold provided with a first heating means and installed in a lower frame;
A pressing member penetrating the upper frame installed at a predetermined distance from the lower frame by the side frames;
An upper mold coupled to a lower end of the pressing member so as to correspond to the lower mold in a space formed between the lower frame and the upper frame with a second heating means installed therein; And
And a support frame provided on both sides of the lower frame, the support frame having movable rollers for horizontally supporting the expansion joint devices to be connected to each other,
The lower mold,
A lower frame provided at a center of the lower frame and protruding from a surface of the lower frame,
The pressing member
And a pressurizing cylinder which is made of a screw rod having a handle or which operates the piston rod by hydraulic pressure or pneumatic pressure,
The vertical members and the end portions of the finger members of the respective elastic joint devices from which the rubber has been removed are connected by butting and welding, and the joint portions welded to each other are positioned between the upper mold and the lower mold, Wherein the vulcanization bonding is performed so that the upper mold and the lower mold pressurize the vulcanization-bonding rubber while heating the vulcanization-bonding rubber to waterproof the vulcanization-bonding rubber by operating the pressing member.
Extension joints for bridges. a) When manufacturing stretch joints, make sure that the rubber is not adhered to the inner surface of the end portion of the vertical member and the finger member, or remove the portion of the rubber bonded to the inner surface of the end portion of the finger member and the vertical member of the expansion joints to be connected ;
b) welding the ends of the finger members to the ends of the vertical members of the expansion joints where the rubber is not adhered or rubber-removed by the step a), and then joining both of the expansion joints by welding;
c) placing a connecting portion of the expansion joints coupled by the step b) between the upper mold and the lower mold of the expansion joint device for a bridge according to the first aspect and disposing the vulcanization adhesive rubber on the connecting portion;
d) When the rubber for vulcanizing and bonding is disposed on the connecting portion, the pressing member of the elastic joint device for bridge is operated while heating the first heating means in the lower mold and the second heating means in the upper mold , Vulcanizing and bonding the vulcanization-bonding rubber to the inner surface of the connecting portion by heating and pressing the vulcanization-bonding rubber to the connecting portion by using the upper mold, and waterproofing the connecting portion by connecting the rubber of the expansion jointing devices step;
e) When another expansion joint device is additionally connected to the end of the expansion joint device already connected to prevent leakage by way of the step d), the end of the expansion joint device to be connected to the outer end surface of the already- And connecting the fastening brackets to each other by fastening the fastening brackets to each other after the waterproof coupling is positioned between the two expansion joint devices,
The waterproof coupling comprises: a metal plate having a predetermined thickness; And vulcanized rubber members provided on both sides of the metal plate and each having insertion protrusions inserted into the inside of the expansion joint device to be connected to each other,
A metal plate formed to a predetermined thickness and made of 2 to 4 pieces; An inner vulcanized rubber material disposed between the metal plates; And vulcanized rubber members respectively provided on outer surfaces of the metal plates and each having insertion protrusions inserted into the inside of the expansion joint device to be connected to each other.
Extension joint connection method for bridges.

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