KR20040029849A - Manufacturing method for pot of elastic pad, pot that is made by the method, and bridge bearing having the pot - Google Patents

Abstract

PURPOSE: A manufacturing method for a pot of an elastic pad is provided to reduce the labor load of workers, to promote the convenience on works, to improve productivity by shortening the working hours, and to reduce the cost of product by simplifying the accessory equipment required for manufacturing a pot and reducing the cost required for manufacturing a pot. CONSTITUTION: The manufacturing method for a pot of an elastic pad comprises the steps of: manufacturing a pot body(111) provided with a slide fitting groove(111a) and a cylinder groove using metal; placing/fixing the pot body(111) on a core(21b) of a lower die(21) to fix a core(21b) of a lower die(21) to a cylinder groove of the pot body(111), then installing an outer frame(23) to a die base(21a) of the lower die(21), then placing/fixing the pot body(111) to the core(21b) of the lower die(21) to fix the core(21b) of the lower die(21) to the cylinder groove of the pot body(111); placing liquefied coating materials(CM) to a gap among the lower die(21), the assembling outer frame(23) and the pot body(111) using a covering materials injection device(40); hardening the coating materials(CM) for an appointed time; removing the outer frame(23); separating a semimanufactured pot from the lower die(21); and attaching sealing materials around the slide fitting groove(111a) of the separated semimanufactured pot.

Description

Manufacturing method for pot and elastic bridge, port made by the method and bridge bearing with same

The present invention relates to a bridge manufacturing method for elastically supporting a bridge or a building structure, a method for manufacturing a port of an elastic pad constituting the same, a port manufactured by the same, and a bridge support having the same.

As is well known, the bridge bearing is to bend or slide while supporting the upper load of the bridge or building structure, and the type of the bridge bearing is generally elastomeric bridge bearing depending on the material and structure of the pad disposed between the upper plate and the lower plate. Bridge Bearing, Spherical Bearing, Monopot-Type Bearing, and Multipot-Type Bearing.

Referring to Figures 1a to 1d will be described a port manufacturing method according to the prior art as follows.

First step; Processing the metal port material (M) to the port body 111 (see Fig. 1a).

As the port material (M), a rolled block that can withstand repeated loads is used well, and the port body 111 is processed using a machine tool.

The port body 111 has a circular sliding plate seating groove 111a which is opened upward in the center of the upper surface of the flange b forming a rectangular cross section, and the annular molding guide a is a sliding plate seating groove. A circular cylinder which protrudes upward from the flange (b) while surrounding the circumference of the (111a), and protrudes downward in the center of the flange (b), with a circular cylinder opened downward in the center thereof. A groove 111b is formed.

Second step; Inserting the port body 111 and the coating material (CM1, CM2, CM3) into the lower mold 21 of the vulcanizing apparatus (see Fig. 1b).

The lower mold 21 is mounted on the lower base 11 and fixed to the mold base 21a and the upper center of the mold base 21a to be fixed to the cylinder groove 111b of the port body 111. A core 21b for supporting the port body 111 and a mold frame 21c mounted on and fixed to the upper circumferential surface of the mold base 21a.

The coating material (CM1, CM2, CM3) is a flexible semi-solid state in which a variety of composites and additives are mixed with natural rubber. First, the ring-shaped first coating material (CM1) is core 21b and mold 21c. ) Between the core body 21 and the mold base 21a, and the port body 111 is sandwiched between the core 21b and the mold frame 21c so that the core 21b is inserted into the cylinder groove of the port body 111. The bottom surface of the cylinder c of the port body 111 is mounted on the first coating material CM1 while being inserted into the 111b). Thereafter, the second coating material CM2 in the form of agglomerate is pushed between the port body 111 and the mold frame 21c, and the ring-shaped third coating material CM3 is inserted around the upper portion of the port body 111. .

Third step; Coating material forming step (see FIG. 1C).

After the second step is completed, when the press mechanism (not shown) of the vulcanizing device is operated, the lower support 11 is moved upward or the upper support 12 is moved downward by the press mechanism, whereby the port body ( As the upper surface of the 111 is pressed on the upper mold 22, the upper mold 22 is engaged with the lower mold 21. When the port body 111 is pressed downward against the upper mold 22, the gel-like coating materials CM1, CM2, CM3 are the gap between the port body 111 and the mold (21, 22) It is pushed in to fill the gap between the port body 111 and the molds 21 and 22.

The exposed surface of the sliding plate seating groove 111a and the upper surface of the molding guide a are engaged with the upper mold 22 to be sealed, and the cylinder groove 111b of the port body 111 is closed by the lower mold 21 fitted therein. Since it is sealed by the core 21b, the covering materials CM1, CM2, and CM3 are the flange b and the cylinder c except the upper surface of the sliding plate seating groove 111a and the molding guide a and the cylinder groove 111b. ) Will wrap around the outside.

4th step; Coating material vulcanization step (see FIG. 1C).

The lower support 11 and the upper support 12 are heated so that the upper and lower molds 21 and 22 and the port body 111 fixed thereto maintain the set vulcanization temperature for a predetermined time. As described above, when the upper and lower molds 21 and 22 maintain the set vulcanization temperature for a predetermined time, the coating material CM between the upper and lower molds 21 and 22 and the port body 111 is gradually vulcanized. Hardened with a sheath 112 (see FIG. 1D).

Fifth step; Pulling out the completion port 110 from the vulcanization molds 21 and 22 of the vulcanizing apparatus (see FIG. 1D).

After performing the fourth step, the press mechanism is operated to separate the lower mold 21 and the upper mold 22 from each other, and to pull out the completed port 110 from the lower mold 21.

The cover 112 of the port 110 surrounds the outer surface of the flange (b) and the cylinder (c) except the upper surface of the sliding plate seating groove (111a) and the molding guide (a) and the cylinder groove (111b), the cylinder The portion surrounding the bottom surface of (c) serves as a lower sealing portion 112a to seal between the lower plate 200 and the port body 111, and also covers the upper surface of the flange (b) while molding molding ( The portion protruding upward from a) is an upper sealing portion 112b, protrudes upward from the sliding plate 140 (see FIG. 2) seated in the sliding plate seating groove 111a, and the upper plate 300 and the port body 111. It performs the function of sealing between.

The port 110 manufactured as described above is then used for the elastic pad 100 as shown in FIG. 2 and the bridge support as shown in FIG. 3.

According to FIG. 2, the elastic pad 100 includes a port 110, an elastic member 120 seated in the cylinder groove 111b of the port 110, and a bottom plate 200 fixed to the bottom plate 200. A piston 130 having a protrusion 131 and inserted into the cylinder groove 111b of the port 110 to seal the elastic member 120 seated thereon, and a sliding plate seating groove 111a of the port 110. A structure consisting of the sliding plate 140 is seated. Here, reference numerals 151 and 152 denote sealing rings for sealing between the cylinder c and the piston 520.

According to FIG. 3, the bridge support includes a lower plate 200 fixed to a pier, an elastic pad 100 mounted on and fixed to a lower plate, and an upper plate 300 fixed to a bridge and supported on an elastic pad 100. The structure is made up. Here, "210" is a fastening portion protruding upward from the upper surface of the lower plate 200 to control the movement of the upper plate 300, "300a" is a guide groove into which the fastening portion 210 is fitted, "400" "Is fastened to the fastening portion 210 is a fixing piece to prevent the separation of the upper plate (300).

However, according to the prior art, after the worker inserts the flexible semi-solid coating materials CM1, CM2, CM3 between the lower mold 21 and the port body 111 by hand, the predetermined pressure is applied through the press mechanism. By applying pressure, the gap between the upper and lower molds 21, 22 and the port body 111 by the pressure applied to the coating materials CM1, CM2, CM3 while the lower mold 21 and the upper mold 22 are engaged with each other. After filling the lower support 11 and the upper support 12 through the heating mechanism through the heating mechanism so that the coating materials (CM1, CM2, CM3) is vulcanized for a predetermined time, the lower mold 21 Since the completion port 110 is forcibly pulled out from the system, productivity is greatly reduced (overworking time is required), labor load of the worker is increased, and expensive manufacturing equipment is required (press mechanism and heating). Equipment is required), the product cost is quite expensive The problem was that it occurred.

Accordingly, the present invention has been invented to solve the above problems, the manufacturing operation is easy, the labor load of the operator is reduced, the productivity is greatly improved, and the elasticity to enable the simplification of peripheral equipment for manufacturing It is an object of the present invention to provide a method for manufacturing a port of a pad, a port manufactured by the port, and a bridge bearing having the same.

1a to 1d are views for explaining a port manufacturing method according to the prior art,

2 is a view showing an elastic pad having a port manufactured according to the prior art;

3 is a view showing a bridge bearing with an elastic pad shown in FIG.

4A to 4H are views for explaining a port manufacturing method according to the present invention;

5a and 5b is a front view and a plan view showing a prefabricated outline frame,

Figure 6 shows an elastic pad with a port made in accordance with the present invention,

FIG. 7 is a view illustrating a bridge bearing with an elastic pad shown in FIG. 6;

FIG. 8 is a right cross-sectional view of FIG. 7 wherein the damper portion is cut away;

9 is a view for explaining another example of the present invention.

-Explanation of terms for the main parts of the accompanying drawings-

11; Lower support, 12; Upper Support,

21; Bottom mold, 21a; Mold base,

21b; Core, 22; Upper mold,

23; Prefabricated frame, 23a; Front Frame,

23b; Rear frame, 23c; Seat Frame,

23d; Right frame, 30; Fastening member,

31; Clip, 32; Push pin,

33; Connection member, 40; Coating material input device,

41; Chamber 42; Quantitative Gauge,

43; Inlet, 44; valve,

50; Electromagnet, 60; Hoist,

100; Elastic pad 110 '; Port Semifinished Products,

110; Port, 111; Port Body,

111a; Sliding plate seating groove, 111b; Cylinder groove,

112; Sheath, 112a; Lower sealing part,

113; Sealant 120; Elastic member,

130; Piston 131; Fixing protrusions,

140; Sliding plate, 151,152; Sealing Ring,

200; Lower plate 300; Top View,

310,320; Rod fastening part 500; Damper,

510; Cylinder 511; Government,

520; Piston 521; hole,

531,532; Piston rod 540; Filling Liquid,

b; Flange, c; cylinder,

B; Base, CM, CM1, CM2, CM3; Material,

M; Pot Material,

The present invention for achieving the above object, the step of processing the port material of the metal material into the port body in which the sliding plate seating groove and the cylinder groove is formed; After fixing the port body to the core of the lower mold so that the core of the lower mold fits into the cylinder groove of the port body, install the prefabricated frame on the mold base of the bottom mold, or install the prefabricated frame on the lower mold. A step of fixing the port body on the core of the lower mold so that the core of the lower mold is fitted into the cylinder groove of the port body; Injecting a liquid coating material into the gap between the lower mold, the prefabricated frame and the port body via the coating material input device; Curing the injected coating material for a set time; Removing the prefabricated frame; Separating the pot semi-finished product from the lower mold; The method of manufacturing a port of an elastic pad, characterized in that the step of attaching a sealing material around the sliding plate seating groove of the separated port semi-finished product, and the port of the elastic pad manufactured thereby, and the bridge bearing having the same.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Referring to Figure 4a to 4h step by step description of the method for manufacturing the pot of the elastic pad according to the present invention.

First step; Processing the metal pot material (M) to the pot body 111 (see Fig. 4a).

As the port material (M), a rolled block that can withstand repeated loads is used well, and the port body 111 is processed using a machine tool. On the other hand, when the processing of the port body 111 is completed, the port body 111 is washed to remove foreign substances attached to the outer surface of the port body 111. In the present embodiment, a block-shaped port material (M) constituting a hexahedron was used, and the manufactured port 110 is also configured to form a hexahedron, but the present invention is not limited thereto and may be modified in various forms.

Second step; Fixing the port body 111 to the lower mold 21 (see Figure 4b).

The port body 111 is fixed to the core 21b of the lower mold 21 so that the core 21b of the lower mold 21 is fitted into the cylinder groove 111b of the port body 111.

Third step; Installing the prefabricated outer mold 23 to the mold base 21a of the lower mold 21.

The prefabricated outer mold 23 is mounted on the mold base 21a and fixed in the front, rear, left, and right directions, and a predetermined gap is formed between the prefabricated outer mold 23 and the port body 111 to cover the coating material CM. .

4th step; Coating material input step (see Figure 4d).

The coating material CM in a liquid state is introduced into the gap between the lower mold 21, the prefabricated outer frame 23, and the port body 111 via the coating material input device 40.

In this embodiment, as the coating material (CM), a curing agent was added to the liquid urethane in a vulcanized state. In the case of the present coating material (CM), since the curing time of the urethane is shortened as the content of the curing agent is increased, its content is appropriately adjusted.

In addition, the coating material input device 40 includes a chamber 41 for temporarily storing the coating material CM, a quantitative gauge 42 for measuring the weight of the coating material CM in the chamber 41, and a chamber ( An inlet 43 for discharging the coating material CM from 41) and a valve 44 for selectively opening and closing the inlet 43 were used. Therefore, when the operator observes the quantitative gauge 42 and pours the quantitative coating material CM into the chamber 41, and opens the valve 44, the coating material CM in the chamber 41 enters the inlet 43. Through the gap is discharged into the gap between the prefabricated frame 23 and the port body 111. When the input of the coating material CM is completed, the interface of the coating material CM is parallel to the upper surface of the port body 111.

The coating material input device 40 is not limited to the present embodiment can be modified in a variety of ways, of course, the coating material (CM) is known in the solidified by the curing material in the liquid state not vulcanized All cladding materials are applicable.

Fifth step; Coating material curing step (see FIG. 4E).

The fourth step is maintained for a predetermined time so that the coating material CM introduced in the fourth step is cured. The coating material CM is gradually cured by a hardening material in the air.

Sixth step; Removing the prefabricated frame 23 (see FIG. 4F).

The prefabricated outer mold 23 is removed from the mold base 21a.

Seventh step; Separating the pot semi-finished product (110 ') from the lower mold 21 (see Figure 4g).

The worker may manually lift the pot semi-finished product 110 'from the lower mold 21, but in this case, since the labor load of the worker is greatly increased, as shown in FIG. 4G, the hoist 60 and the fixed It will be preferable to lift and transport the pot semi-finished product 110 ′ using the electromagnet 50.

Eighth step; Attaching the sealing material 113 (see FIG. 4H).

The sealing material 113 is attached around the sliding plate seating groove 111a of the port semi-finished product 110 '. The sealant 113 can be used as long as it can maintain the airtightness between the elastic pad 110 and the top plate 200 (see FIG. 7). In this embodiment, a sponge in which a synthetic resin is foamed is used. .

Meanwhile, a separate adhesive may be applied to the outer surface of the port body 111 to be coated so that the coating material CM is attached to the port body 111, or the lower mold 21 and the prefabricated outer frame 23 are not coated. Additional work, such as the application of a separate release agent on the outer surface of the port body 111 is performed at an appropriate step.

According to the present invention, since the liquid coating material CM is used, an upper mold 22 (refer to FIG. 1B showing the prior art) is unnecessary at the time of molding, and a press mechanism for pressurizing for molding (prior art The description) becomes unnecessary.

In addition, since the external force by the pressure does not act, the thickness of the lower mold 21 can be reduced, and furthermore, since the lateral force in the transverse direction centered on the port body 111 is greatly reduced, the assembly and disassembly of the outer mold It becomes possible to replace it with the easily assembled frame 23. As such, when the prefabricated outer mold 23 is used, the port main body 111 may be inserted into the lower mold 21 to be fixed, or the port semifinished product 110 ′ may be easily separated from the lower mold 21. In the present embodiment, as shown in Figs. 5a and 5b, it consists of a pair of front and rear frame 23a, 23b in the form of a plate and the left and right surface frame 23c, 23d in the form of the letter "c". , Using a prefabricated outer frame 23 that is fastened to each other sequentially through the fastening member 30. In addition, the fastening member 30, the removable clip 31 for fixing the front end of the mutually abutted frame 23a, 23b, 23c, 23d to a predetermined pressure, and the mutually abutted frame 23a, 23b, 23c, 23d It was made of a fixing pin 32 to be detachably fitted to the front end of the clip and the clip 31 to prevent the separation of the clip 31. Here, reference numeral 33 denotes a connecting member for connecting the clip 31 and the fixing pin 32 to each other.

In the case of the present invention, since the curing agent is added to the liquid urethane as the coating material CM, that is, the unvulcanized material is used as the coating material CM, so that the vulcanization step is unnecessary. Accordingly, since the lower support 11 (see FIG. 1B) and the upper support 12 (see FIG. 1B) need not be heated to vulcanize the coating material CM, as in the prior art, the lower support 11 and the upper support ( There is no need for a separate heating mechanism for heating 12), and the working time for coating molding is greatly shortened.

In the case of forming the coating 112 by injecting the liquid coating material CM between the prefabricated outer frame 23 and the port body 111 without using the upper mold 22 as in the present invention, There is no need for a molding guide (a; see FIG. 1A) for coating molding. Therefore, in the present embodiment, as shown in Figure 4a, a circular sliding plate seating groove 111a is formed in the center of the upper surface of the flange (b) forming a square cross section in an upward direction, and the cylinder having a circular columnar shape ( c) is protruded downwardly of the flange (b), the center of the port body 111 is used to form a structure in which a circular cylinder groove (111b) is opened in the downward direction. In the case of using the port body 111 according to the present embodiment, since the bottom surface of the flange b is elastically supported by the sheath 112, there is a structurally advantageous advantage when bending the upper plate 200. However, when the cover 112 positioned on the bottom surface of the flange b is exposed from the outside, and the upper plate 200 is bent and the port main body 111 is inclined to either side about the piston 130, the flange ( b) Since the coating 112 positioned on the bottom surface easily swells, the function of supporting the port body 111 may be insignificant. Therefore, as shown in Figure 9, while the overall shape forms a hexahedral block, the upper surface is formed with the sliding plate seating groove (111a) is opened to the top, the lower surface is formed with a cylinder groove (111b) is opened to the lower It can be said that using the port body 111 is more preferable in the processing surface of the port body 111.

6 is a view showing an elastic pad having a port according to the present invention, whereby the elastic pad 100 includes a port 110 manufactured by the present invention and a cylinder groove 111b of the port 110. The elastic member 120 is seated on the lower end, and has a fixing protrusion 131 is inserted into the lower plate 200 is fixed to the cylinder member 111b of the port 110 is inserted into the elastic member 120 seated thereon A seal 130 comprises a sealing plate, and a sliding plate 140 seated in the sliding plate seating groove 111a of the port 110.

FIG. 7 shows a bridge bearing with an elastic pad 100 shown in FIG. 6, whereby the bridge bearing includes a lower plate 200 fixed to a pier, an elastic pad 100 mounted on a lower plate and fixed thereto. Is fixed to the bridge forms a structure consisting of a top plate 300 is supported on the pad 100.

On the other hand, the bridge (not shown) is fixed to the top plate 300 is gradually elongated or reduced in the longitudinal direction by the temperature difference due to the seasonal change, but the external factors such as vehicles or wind or earthquake passing over the bridge It is quickly stretched or shrunk by this, but if it is forcibly stretched or shrunk quickly, there is a risk of cracking in the bridge.

Therefore, as shown in FIGS. 7 and 8, it is preferable that both sides of the lower plate 200 and the upper plate 300 are connected to each other via a pair of dampers 500 with respect to the elastic pad 100. Do.

In the present embodiment, the cylinder 510 having a rotation fixing part 511 is rotatably fixed to the lower plate 200; A filling liquid 540 filled in the cylinder 510; A piston 520 having a hole 521 through which the filling liquid 540 of the cylinder 510 flows and inserted into the cylinder 510 so as to be linearly reciprocated; One end is fixed to the piston 520, the other end is opposed to each other around the piston 520, which penetrates the piston 520 and is exposed to the outside fastening to the rod fastening portion 310,320 of the upper plate 300 A pair consisting of a pair of piston rods (531, 532) arranged to be used as the damper 500. On the other hand, when using the damper 500 according to the present embodiment, as shown in Figures 7 and 8, it is preferable that the upper plate 300 is not lifted upward by using the fixing piece 400. Do.

When explaining the operation state of the bridge, when the bridge is quickly stretched or contracted, the upper plate 300 fixed thereto is mounted on the sliding plate 140 of the elastic pad 100, and supported, in the forward or backward direction (Fig. 8). On the right and left), but the external force applied through the upper plate 300 is primarily the rod fastening portions 310 and 320 of the upper plate 300 → piston rods 531 and 532 → piston 520 → the filling liquid 540 → After the cylinder 510 is transferred to the rotation fixing part 511 → lower plate 200 → piers of the cylinder 510, the filling liquid 540 flows through the hole 521 of the piston 520 to the other side. The piston 520 gradually moves to either side. Therefore, since the upper plate 300 is gradually slid in the forward or rearward direction, the bridge is prevented from rapidly expanding or contracting, and the impact applied thereto is absorbed.

The length extension or length extension in the front and rear direction of the bridge (the axial direction) is largely generated, while the length extension or length extension in the left and right direction (orthogonal to the bridge axis) occurs considerably, and the bridge moves in the left and right direction. As the safety of the bridge is greatly threatened when it is biased, it is very important that the upper plate 300 is not moved in the left and right directions, but in the case of the present invention, the flow of the upper plate 300 in the left and right directions is lower than the lower plate 200. Since it is supported by the rotation fixing unit 511 which is rotatably fixed to, such a problem does not arise.

The bending of the bridge in the forward and backward directions is naturally performed by the rotation fixing part 511, but the bending of the bridge in the left and right directions is prevented by the rotation fixing part 511, and the bridge overturning in the left and right directions occurs. Will not be.

In the present embodiment, the second step is performed first and the third step is performed later, but if necessary, the third step can be performed first and the second step can be performed later.

However, in view of the convenience of the work to fix the port body 111 by mounting the lower mold 21, if the third step is performed first and the second step later, the port body 111 is transferred Since the direction is restricted and there is a risk that the port body 111 may interfere with the prefabricated outer frame 23, it is more preferable to perform the second step first and the third step later as in the present embodiment.

The present invention is not limited to the above embodiments, and of course, various modifications can be made without departing from the scope of the following claims.

As an example, the above embodiments exemplify a method of manufacturing a single port having one port body, but of course, may be applied to the manufacture of multiple ports having a plurality of port bodies.

In addition, it is also possible to use as a bridge support that a single elastic pad having a port manufactured according to the present invention between the upper plate and the lower plate as a bridge support, such a bridge support with a plurality of single elastic pad support is the same as the multiport bridge support It performs a function, so you can use it instead.

According to the present invention as described above, by using a coating material in a liquid state to harden it, the labor load of the worker is greatly reduced, the work is convenient, the productivity is greatly improved due to the reduction of working time do.

Moreover, since peripheral devices for port manufacturing are considerably simplified, the cost of port manufacturing equipment is drastically reduced, and thus, the product cost is greatly reduced.

Claims (7)

Processing the metal port material (M) into a port body (111) in which a sliding plate seating groove (111a) and a cylinder groove (111b) are formed; After the port body 111 is fixed to the core 21b of the lower mold 21 so that the core 21b of the lower mold 21 is fitted into the cylinder groove 111b of the port body 111, the prefabricated outer frame (23) is installed in the mold base 21a of the lower mold 21, or the prefabricated outer mold 23 is installed in the lower mold 21, and then lowered in the cylinder groove 111b of the port body 111. Placing and fixing the port body 111 on the core 21b of the lower mold 21 so that the core 21b of the mold 21 is fitted; Injecting a liquid coating material (CM) into a gap between the lower mold 21, the prefabricated outer frame 23, and the port body 111 through the coating material input device 40; Curing the injected coating material (CM) for a set time; Removing the prefabricated frame 23; Separating the pot semi-finished product 110 'from the lower mold 21; Method of manufacturing a port of the elastic pad, characterized in that consisting of the step of attaching the sealing material 113 around the sliding plate seating groove (111a) of the separated port semi-finished product (110 '). The port of the elastic pad, characterized in that it is manufactured by claim 1. The port body 111 of the port 110, the circular sliding plate seating groove (111a) is formed in the center of the upper surface of the flange (b) forming a rectangular cross section in an upward direction, and the circular shape The column-shaped cylinder (c) protrudes downwardly of the flange (b), and forms a structure in which a circular cylinder groove (111b) is opened at the center thereof, and the cover of the port (110) ( 112 has a structure surrounding the sliding plate seating groove (111a) and the upper surface of the flange (b) and the portion except the cylinder groove (111b), the sealing material 113 is slipped on the upper surface of the flange (b) exposed to the outside Wrapped around the plate seating groove (111a) is attached, the port of the elastic pad, characterized in that the overall shape of the port 110 forms a hexahedral block shape. According to claim 2, wherein the port body 111 of the port 110, the overall shape is in the form of a hexahedral block, the upper surface is formed with a sliding plate seating groove (111a) which is opened upward, the lower surface is opened downward The cover 112 of the port 110 is formed on the upper surface of the port body 111 including the sliding plate seating groove 111a and the cylinder groove 111b. The sealing member 113 is attached to the upper surface of the port body 111 exposed to the outside, and surrounds the sliding plate seating groove 111a, and the overall shape of the port 110 is a hexahedral block shape. Port of the elastic pad, characterized in that the forming. In the bridge support consisting of a lower plate 200 fixed to the bridge, an elastic pad 100 mounted on the lower plate and fixed, and an upper plate 300 fixed to the bridge and mounted on and supported by the pad 100, The elastic pad 100 is fixed to the port 110 described in claim 2, the elastic member 120 seated in the cylinder groove 111b of the port 110, the lower plate 200 is fixed to the bottom A piston 130 having a protruding portion 131 for insertion and sealing the elastic member 120 seated in the cylinder groove 111b of the port 110 and the sliding plate seating groove 111a of the port 110. Bridge support, characterized in that consisting of a sliding plate 140 seated on. The bridge bearing according to claim 5, wherein both sides of the lower plate (200) and the upper plate (300) are connected to each other via a pair of dampers (500) with respect to the elastic pad (100). 6. The damper (500) according to claim 5, further comprising: a cylinder (510) having a rotation fixing part (511) fixedly rotatable to the lower plate (200); Filling liquid 540 is filled in the cylinder 510; A piston 520 having a hole 521 through which the filling liquid 540 of the cylinder 510 flows and inserted into the cylinder 510 so as to be linearly reciprocated; One end is fixed to the piston 520, the other end is opposed to each other around the piston 520, which penetrates the piston 520 and is exposed to the outside fastening to the rod fastening portion 310,320 of the upper plate 300 Bridge bearing, characterized in that consisting of a pair of piston rods (531,532) arranged to be.