KR101822905B1 - Seismic isolation device for a bridge - Google Patents

Abstract

The present invention relates to a seismic isolation device for a bridge which facilitates installation and construction, introduces a spring-type elastic body to secure a high modulus of elasticity to allow quick elastic restoration, and easily secures a space by minimizing an upper bearing plate by reducing a size of an upper plate and reducing a height of a side plate. The seismic isolation device for a bridge comprises: a front end pin whose lower end is inserted and arranged into an accommodation groove dented on an upper surface of a bridge post; a bearing block wherein an upper end of the front end pin passing through a center hole penetrating a disk stacked on the upper surface of the bridge post is assembled on a lower surface thereof to be stacked via the disk; an upper bearing plate connected to a lower portion of a bridge to cover and enclose the bearing block; and an impact absorbing unit to elastically absorb a lateral pressure created during a horizontal movement of the upper bearing plate. The impact absorbing unit includes a spring-type elastic body wherein both ends thereof come in contact with an inner surface of the upper bearing plate, and a center thereof is fixed on a position adjacent to the bearing block.

Description

[0001] SEISMIC ISOLATION DEVICE FOR A BRIDGE [0002]

The present invention relates to a seismic isolation device for bridges,

More specifically, it is easy to install and construct, and by introducing a leaf spring type elastic body, a high elastic modulus can be ensured and quick resilient restoration can be achieved. By reducing the size of the upper plate and reducing the height of the side plate, And more particularly, to a seismic isolation device for a bridge having ease of securing space.

Generally, a bridge seismic isolation device is installed between a support structure and an upper structure so that an upper structure such as an upper support plate, which is a slab structure of a bridge, is properly supported and supported on a support structure such as a pier supporting the bridge, And has various shapes and functions according to the support load.

Some of these bridge seismic equipments are installed at fixed ends of bridges so as to elastically support only the upward and downward loads of the upper structure and do not allow the upper structure to move in the horizontal direction. However, And the upper structure is moved to a certain extent in the horizontal direction to buffer the force acting in the horizontal direction due to the wind pressure, running, stopping, earthquake, etc. of the wind, There is also something that allows.

In particular, the larger the bridge, the longer the upper pavement plate, so the stretching and shrinkage increases due to seasonal changes and thermal deformation due to the weathering. In particular, the upper pavement plate is not only deformed by shrinkage and stretching due to the difference in winter and summer seasons, In order to prevent the deformation of the bridge due to the load, it is necessary to install an isolation device between the bridge's upper bridge and the piers to absorb the load and impact of the upper bridge, and sufficiently cope with the contraction and extension of the bridge .

As shown in FIGS. 1A and 1B, a conventional anchorage device (refer to Japanese Patent No. 10-0757749, filed on Sep. 5, 2007) has a structure in which a plurality of anchor members 15 are fixed A bearing block 20 rotatably fixed to the lower plate 10 via a shear pin 25 and a bearing block 20 for buffering the pressure received by the bearing block 20, A disk 30 such as an elastic pad interposed between the lower block 10 and the upper block 10 and a lower block 10 which receives the pressure applied by the mold 3 of the bridge as an upper structure and covers the bearing block 20, And a cushioning part 50 for absorbing and extinguishing the pressure of the side pressure generated at the time of sliding in the horizontal direction by the upper pressure plate 40 connected to the bridge, which is the upper structure.

The cushioning part (50), which has one end touching the side plate (45) extending from the outer side to the lower side of the upper side pressure plate (40) and absorbing and extinguishing the side pressure generated when the mold is moved in the horizontal direction of the upper structure, A cylindrical elastic body 52 made of a rubber and an elastic body and an end portion passing through the elastic body 52 is slidably mounted on a mounting hole 27 formed horizontally through the outer surface of the bearing block 20, (54).

Accordingly, when the mold 3 connected to the upper platen moves in the horizontal direction due to the occurrence of an earthquake or an external force caused by a vehicle running on the bridge, the upper platen 3, which is moved horizontally with respect to the bearing block 20, The side plate of the cushion 40 contacts the end of the cushioning portion 50 to absorb the external force in the horizontal direction.

However, in order to increase the absorption efficiency for absorbing the external force in the horizontal direction in the conventional seismic apparatus, it is necessary to increase the outer diameter of the cylindrical elastic body 52 and increase the number of buffer pads installed in the bearing block 20.

In this case, if the height of the bearing block 20 increases in accordance with the outer diameter of the elastic body 52, the manufacturing cost is increased because the volume increases, and if the number of the buffer pads is increased, The cross-sectional area of the bearing block is reduced to weaken the rigidity. As a result, a fatal structural defect is caused in the bridge facility, and the installation work becomes complicated and prolonged.

The buffer pad 50 maintains a state where the outer surface of the bearing block 20 and the side plate 45 of the upper pressure plate 40 are always in contact with each other, Since the elastic compression and elastic restoration for absorbing the external force are repeatedly performed, the service life of the elastic body is shortened, and therefore, the replacement time is increased and the cost for replacing the elastic body is excessively high, .

Further, in the conventional seismic isolation device, the elastic body constituting the buffering portion is provided in the form of a block type or a coil type. Such conventional elastic bodies are relatively weak in their restoring force and, due to their shape, The size of the upper platen is relatively large, which is a burden on securing the space.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems,

It is easy to install and construct, and by introducing a leaf spring type elastic body, it is possible to secure a high elastic modulus and to perform quick elastic restoration, and it is possible to reduce the size of the upper plate and the height of the side plate, And an object of the present invention is to provide a seismic isolation device for a bridge.

It is another object of the present invention to simplify the structure and reduce the number of components by introducing a cushioning portion composed of a plate spring type elastic body and support pins, thereby reducing manufacturing cost and reducing the probability of occurrence of defects.

Another object of the present invention is to make it possible to easily obtain a desired restoring force by introducing an adjusting member for adjusting the curvature of the elastic body and adjusting the insertion length of the supporting pin.

The present invention having the above object

The upper end of the front plate passing through the center hole formed through the disk stacked on the upper surface of the pier is assembled to the lower surface of the lower plate, And a cushioning portion elastically absorbing a pressure applied to the lateral side of the upper cushioning plate when the upper cushioning plate is horizontally moved, And the buffer part includes a plate spring type elastic body whose both ends are in contact with the inner surface of the upper pressure plate and the center part is fixed to the adjacent position of the bearing block.

The buffer part is assembled through both the first assembly hole formed in the support plate provided at the adjacent position of the bearing block, the second assembly hole formed at the center of the elastic body, and the third assembly hole formed through the upper support plate, And a support pin that is fixedly coupled to the first assembly and fixes a center portion of the elastic member to an adjacent position of the bearing block.

The buffer may further include an adjuster assembled at the other end of the support pin so as to adjust an insertion length of the support pin to adjust the curvature of the elastic body.

Further, the first assembled hole has a first female screw portion, the adjusting member has a second female screw portion, the support pin has a first male screw portion at one end and a second male screw portion at the other end, And the insertion length is adjusted by the screw portion or the second male screw portion or both.

According to the present invention,

It is possible to provide a space elasticity restoration by securing a high elastic modulus by introducing a plate spring type elastic body and it is possible to provide a space securing property by minimizing the size of the upper platen according to the size of the upper plate and the height of the side plate, By simplifying the structure and reducing the number of parts, it is possible to provide a reduction in manufacturing cost and a reduction in the probability of occurrence of defects. Further, it is possible to adjust the insertion length of the support pin for adjusting the curvature of the elastic body, .

BRIEF DESCRIPTION OF THE DRAWINGS Fig.
2 is a perspective view (rear view) of the present invention.
3 is a plan sectional view of the present invention.
4 is a side cross-sectional view of the present invention.
5 is a use state diagram of the present invention.
6 is an embodiment of the present invention.

While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

It is to be understood that the first to second aspects described in the present specification are merely referred to in order to distinguish between different components and are not limited to the order in which they are manufactured, It may not match.

The present invention is simple in installation and construction, and it is possible to secure a high elastic modulus by introducing a leaf spring type elastic body, thereby enabling a quick elastic restoration. Further, by reducing the size of the upper plate and reducing the height of the side plate, The present invention relates to an isolation device for a bridge having ease of securing.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an insulation displacement device for a bridge (hereinafter referred to as " device D ") according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a perspective view (bottom side) of the present invention, FIG. 3 is a plan sectional view of the present invention, FIG. 4 is a side sectional view of the present invention, and FIG. 5 is a use state diagram of the present invention.

The apparatus D is disposed between the bridge pier 2 and the mold 3 of the bridge so as to absorb the external force in the lateral direction during the horizontal movement due to a strong external force such as an earthquake, A bearing block 130, an upper bearing plate 140, and a cushioning part 150 as shown in FIG.

 2 to 5, the front end fin 110 is inserted into the receiving recess 112 formed in the upper surface of the pier 2 at a predetermined depth, and the upper end is inserted into the bearing And is assembled at a substantially central portion on the lower surface of the block 130, and is constituted by a kind of pin member.

The pier 2 includes a non-shrinkable mortar layer 115 formed on an upper surface of the shrinkable mortar layer 115 so as to be embedded in the receiving groove 112, And a bracket 114 having a recess 116 formed at a predetermined depth so that the lower end of the shear pin 110 can be inserted and disposed can be disposed.

Accordingly, the bracket 114 is mounted on the upper surface of the non-shrinkable mortar layer 115 having a predetermined thickness on the upper surface of the bridge pier 2, and the unshrinkable mortar layer 115, .

In this case, it is not necessary to provide a lower plate for assembling the lower end of the shear pin 110 to the upper surface of the bridge pier 2 as well as the lower plate by a plurality of anchor members, Therefore, the present invention has the effect of reducing the number of components, simplifying the process of installing the apparatus D, and shortening the construction time, thereby reducing the construction cost.

Further, in order to fix the lower plate to the bridge pier 2, the bridge pier 2 made of a concrete structure is prevented from being damaged and cracked by an anchor member which is assembled at a certain depth in the vicinity of the outer edge of the bridge pier to stably maintain the rigidity of the bridge pier. .

The lower end of the shear pin 110 is spaced apart from the bottom surface of the recess 116 formed in the upper surface of the bracket 114 by a predetermined size and the outer diameter of the shear pin 110 is larger than the outer diameter of the groove 116 It is preferable that the inner diameter is smaller than the inner diameter.

2 through 5, the bearing block 130 is configured to be stacked on top of the pier 2 via a disk 120 stacked on the top surface of the pier 2. Here, 120 are rectangular or circular plate members formed through a central hole 125 of a predetermined size so that the shear pin 110 can pass through the center of the body.

The disc 120 is preferably made of an elastic material so as to buffer an external force, which is a vertical impact force transmitted to the pier 2 through the bearing block 130.

The upper end of the front end pin 110 passing through the central hole 125 of the disk 120 is fastened to the female threaded portion 135 by forming the female threaded portion 135 in the central area of the lower surface of the bearing block 130 Can be assembled.

The bearing block 130 assembled to the lower end of the front end fin 110 is stacked on the upper surface of the pier 2 via the disc 120 stacked on the upper surface of the bracket 114 .

Referring now to Figures 2 to 5, The upper bearing plate 140 is assembled in a bolt or welding manner so as to be connected to the lower portion of the bridge 3 as the upper structure to cover the bearing frame 130 disposed on the upper surface of the bridge 2, This upper pressure plate 140 includes an upper plate 142 corresponding to the upper surface of the bearing block 130 and a side plate 144 extending from the outer edge of the upper plate to surround the outer edge of the bearing block do.

The upper bearing plate 140 includes a side plate 144 in the form of a rectangular frame on the outer edge of the upper plate 142 in the shape of a square plate so as to cover the bearing block 130 on the substantially rectangular parallelepipedal surface and to surround the outer surface. However, the present invention is not limited thereto, and may be formed as a cylindrical side plate 144 on the outer edge of the circular upper plate 142 so as to cover the outer bearing surface while covering the bearing block 130 on the disk.

An upper slide plate fixed to a lower surface of the upper plate 142 so as to minimize frictional resistance between the upper plate of the upper pressure plate 140 and the upper surface of the bearing block 130 contacting the upper plate, And a lower slide plate fixed to the lower slide plate.

Here, it is preferable to apply a lubricant such as grease to the upper and lower slide shafts so that the horizontal movement of the upper bearing plate 140 relative to the bearing block 130, which is difficult to horizontally move when the bridge moves horizontally, , And the lower slide plate may be made of a fluororesin.

2 to 5, the buffering unit 150 is configured to elastically absorb the lateral pressure generated when the upper pressure plate 140 is horizontally moved along with the horizontal movement of the bridge. In particular, (D) includes a buffer spring type elastic body 151 in which both end portions 151a are in contact with the inner surface of the upper pressure plate 140 and the center portion 151b is fixed in the vicinity of the bearing block 130 .

Since the elastic body 151 is formed in a plate shape, it has an advantage that the elastic modulus is higher than that of the block-type or coil-type spring, and the speed at which the shape is deformed by the horizontal external force and then restored to its original state is fast. In order to prevent corrosion, it is preferable that the surface of the elastic body 151 is subjected to corrosion prevention treatment such as zinc plating.

In addition, since the elastic body 151 has a small area in the horizontal direction as compared with the block type or coil type, the size of the upper plate 142 of the upper pressure plate 140 is smaller than that of the block type or coil type The size of the side plate 144 can be reduced and the size (volume) of the upper side pressure plate 140 can be minimized. As a result, the size of the present device D can be reduced, So that it is possible to apply the present device D to the bridges with a minimum of space. In other words, it can be seen that the device D adds ease of space.

2 to 5, the apparatus D includes a first assembly hole h1 formed in a support plate 154 provided at a position adjacent to the bearing block 130, A second assembly hole h2 formed in the center portion 151b of the upper plate 151 and a third assembly hole h3 formed in the upper plate portion 140. One end of the third assembly hole h1 is engaged with the first assembly hole h1, And a support pin (152) for fixing the center portion (151b) of the elastic body (151) to the adjacent position of the bearing block (130).

Here, the support plate 154 may be formed of a plate member like the elastic body 151, and may be integrally formed with the elastic body 151 in the same manner as welding in some cases.

One end of the support pin 152 is fixedly coupled to the first assembly hole h1 so that the central portion 151b of the elastic body 151 is fixed to the adjacent position of the bearing block 130, (151) is bent in an arch shape so that the elastic body (151) can have an appropriate restoring force.

The cushioning portion 150 having the configuration of the plate spring type elastic body 151 and the support pin 152 has a relatively simple structure and a small number of parts as compared with the conventional block type or coil type cushioning means, (The increase in the number of parts leads to an increase in the binding site, and the higher the binding site, the higher the probability of occurrence of the failure).

2 to 5, the apparatus D includes a buffer pin 150 for adjusting the insertion length of the support pin 152 for adjusting the curvature of the elastic body 151, And an adjusting member 153 assembled to the other end of the first and second supporting members 152 and 152.

The adjuster 153 may be formed of a nut member and is preferably coupled to the support pin 152 while contacting the outer surface of the side plate 144 of the upper support plate 140, will be.

The first fitting hole h1 is provided with a first female threaded portion f1 and the adjusting body 153 is provided with a second female threaded portion f2 And the support pin 152 has a first male thread m1 at one end and a second male thread m2 at the other end so that the first male thread m1 or the second male thread m2, The insertion length can be adjusted by all (m1) (m2).

More specifically, the first male screw portion m1 of the support pin 152 is screwed to the first female screw portion f1 of the first assembly hole h1, It is possible to attach or detach it to the assembly hole h1, which provides convenience for the maintenance, maintenance, and management of the apparatus D.

In addition, since the support pin 152 is screwed to the first assembly hole h1, the insertion length of the support pin 152 can be adjusted incidentally. Here, the insertion path of the support pin 152 refers to the length inserted into the upper support plate 140 from the entire length of the support pin 152. [

The second male screw portion m 2 is coupled to the second female screw portion f 2 of the adjusting member 153 through which the support pin 152 can be coupled to or detached from the adjusting member 153, Maintenance, maintenance, and the like are convenient. As described above, the nut type adjuster 153 can be introduced, and the insertion length of the support pin 152 can be adjusted.

Particularly, the screw connection between the second male screw portion m2 and the second female screw portion f2 is mainly intended to control the insertion length of the support pin 152. The screw engagement between the second male screw portion m1 and the second male screw portion m1, lt; RTI ID = 0.0 > m2 < / RTI >

FIG. 6 is a perspective view of an embodiment of the present invention (modified embodiment) in which the length of the support pin 152 is adjustable to enable the production of various sizes of isolation devices without additional production of the support pins 152 And the like.

It has been described above that the support pin 152 can be adjusted in its insertion length by the adjuster 153. However, when the size of the apparatus D (seismic isolation device) is to be changed in accordance with the standard of the bridge, the size of the upper support plate 140 is also changed. As a result, It is necessary to introduce the support pin 152 into the support pin 152. In order to meet the various specifications, the production of the support pin 152 in a different size continuously causes not only a burden on the cost of producing the mold, but also a problem of lowering the production efficiency.

Accordingly, the present invention intends to make it possible to manufacture various types of seismic isolation devices by introducing a length-adjustable support pin (hereinafter referred to as an adjustment pin 152).

As shown in FIG. 6, the apparatus D includes an outer first body 152a and an inner second body 152b, to which the adjustment pins 152 are coupled with each other.

The adjusting pin 152 is provided with a length adjusting means 5 for adjusting the length of the adjusting pin 152 by adjusting the overlapping degree of the first body 152a and the second body 152b .

(In reality, the adjustment pin 152 is disposed horizontally, but the following description will be made with reference to the direction shown in FIG. 6 for convenience of explanation)

More specifically, as shown in FIG. 6, the length adjusting means 5 mainly includes an adjusting projection 51, an access groove 52, an elastic member 53 provided on the outer first body 152a side, And engagement grooves 55 provided on the second body 152b side.

For each configuration, first, the adjusting projection 51 is provided on the outer first body 152a side so as to protrude inward.

The next entry and exit groove 52 is formed in the outer first body 152a and accommodates the adjustment projection 51 pressed by the outer surface of the inner second body 152b with the adjustment projection 51 coming in and out.

The elastic member 53 is provided inside the access groove 52 and is pressed by the outer surface of the inner second body 152b to release the pressing of the adjusting projection 51 received in the access groove 52 (When the adjustment projection 51 is located at one of the engagement grooves 55), the adjustment projection 51 is pushed out to be inserted into any one of the engagement grooves 55.

The following engagement grooves 55 are arranged perpendicular to the second body 152b and the adjustment projections 51 pushed by the elastic members 53 are inserted. The first and second bodies 152a, The length of the adjusting pin 152 is adjusted by adjusting the overlapping length of the engaging recesses 152b and the engagement between the engaging protrusion and the engaging recesses 55, that is, the engaging recesses is inserted into any one of the plurality of engaging recesses 55, The length of the pin 152 is maintained.

(The latching grooves 55 are all of the same structure, and in the following description, the expression of the latching grooves 55 is interpreted to refer to any one of the plurality of latching grooves 55)

6, the engaging grooves 55 have four rectangular inner grooves w1, w2, w3 and w4. In the inner wall of the engaging groove 55, w1 and the one side second inner wall w2 have a first sloped portion s1 and a second sloped portion s2 respectively and the first and second sloped portions s1 and s2 are engaged with the engaging groove 55, In the direction of widening the width of the light guide plate.

The first inner wall w1 may be an inner wall of the lower portion with respect to an upright state of the adjusting pin 152 and the second inner wall w2 may be either an inner wall of the left portion or an inner wall of the right portion. In Fig. 6, the second inner wall w2 is the inner wall of the right side portion.

The fact that the first and second inclined portions s1 and s2 are formed in the direction in which the width of the engaging groove 55 is widened means that the first and second inclined portions s1 and s2 The outer width is formed to be larger than the inner width of the latching groove 55, and it is expected that it is not so difficult for an ordinary technician to understand the structure of the latching groove 55 by this expression.

The structure related to the first inner wall w1 of the latching groove 55 allows the outer first body 152a to move only in the direction of extending the length of the adjusting pin 152. [

Specifically, when the outer first body 152a is lowered, since the first inner wall w1 has the first inclined portion s1, the adjusting projection 51 is easily detached from the engaging groove 55, The length of the adjusting pin 152 can be increased without being affected by the latching groove 55. [

When the outer first body 152a tries to move up, the upper third inner wall w3 keeps the adjusting projection 51 inserted into the locking groove 55, so that the stopping is performed, 55 do not reduce the length of the adjustment pin 152. [

Therefore, by the structure related to the first inner wall w1 of the engagement groove 55, the adjustment pin 152 can pull the outer first body 152a and extend the length of the adjustment pin 152. Even if an external force acts, .

As described above, the length of the adjusting pin 152 is only increased by the first inner wall w1. However, the length of the adjusting pin 152 is reduced by the structure of the second inner wall w2 constituting the engaging groove 55 .

Specifically, when the outer first body 152a is rotated to the right (with the second inner wall w2 set to the right wall) in a state where the adjusting projection 51 is inserted into the engaging groove 55, Since the second inner wall w2 has the second inclined portion s2, the adjusting projections 51 are easily separated from the engaging grooves 55 and escape from the region of the vertically arranged engaging grooves 55 So that the adjustment projection 51 is pressed by the outer surface of the inner second body 152b to be accommodated in the access groove 52. [

The outer first body 152a can be raised without being influenced by the engaging groove 55 and the inner diameter of the adjustment pin 152 can be increased by the adjustment protrusion 51 inserted into the insertion / The length can be reduced. When the length of the adjusting pin 152 is reduced and then the length of the adjusting pin 152 is adjusted again, the outer first body 152a is rotated to the left so that the adjusting protrusion 51 is engaged with the engaging groove 55) group, and then the outer first body 152a is lowered.

It is also possible to provide the inclined portion on the fourth inner wall w4 located on the opposite side of the second inner wall w2 and the outer first body 152a or the inner second body 152b may be provided with an inclined portion, It is preferable that a restricting member (not shown) for restricting the rotation angle of the outer first body 152a is provided so that the one body 152a does not rotate excessively more than necessary.

6, a first magnetic portion 61 is provided at an end of the adjusting projection 51, and a second magnetic portion 61 is provided at the end of the adjusting projection 51. As a result, 55 may have a second magnetic portion 62 and a third magnetic portion 63 may be provided on the first inner wall w1 (first inclined portion s1) of the engaging groove 55 .

In particular, the first magnetic portion 61 and the third magnetic portion 63 are made of the same pole, and the first magnetic portion 61 and the second magnetic portion 62 are made of different poles. For example, Assuming that the magnetic portion 61 is an N pole, the second magnetic portion 62 is made of the S pole and the third magnetic portion 63 is made of the N pole. Of course, it is obvious that the other surfaces of the first to third magnetic portions 61, 62, 63 are buried without being exposed, and the other surface has opposite poles.

When the adjusting projection 51 is moved toward the engaging groove 55, the first magnetic portion 61 and the second magnetic portion 62 are attracted to each other to enhance the movement of the adjusting projection 51, The first magnetic portion 61 and the third magnetic portion 63 push each other out, and the movement of the adjusting projection 51 is strengthened.

It is preferable that the first to third magnetic portions 61, 62 and 63 are made of a magnetic sheet which is adhered or fused to the adjusting projection 51 or the engaging groove 55.

Particularly, as shown in the lower right-hand chain line area of FIG. 6, the second magnetic portion 62 is provided at the end portion of the engaging groove 55 side, and the head 621a and the column 621a 621b.

The fitting protrusion 621 is inserted into the inner surface of the locking groove 55 and the fitting groove 551 having the wide portion 551a for receiving the head 621a of the fitting protrusion 621 is formed, It is preferable that the magnetic member 62 is structured to be firmly attached by the engagement between the fitting protrusion 621 and the fitting groove 551 when the magnetic portion 62 is attached (or melt-bonded) to the inner surface of the locking groove 55.

In FIG. 6, the third magnetic portion 63 is provided on the first inner wall w1. However, the third inner magnetic portion 63 may be applied to the second inner wall w2. 6 shows the structure of the fitting projection 621 and the fitting groove 551 as well as the first magnetic portion 61 and the third magnetic portion 63, When the first magnetic portion 61 is provided with the fitting protrusion 621, the fitting groove 551 is provided with the adjusting protrusion 51 and when the third magnetic portion 63 is provided with the fitting protrusion 621, The groove 551 will be provided on the first inner wall w1.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

D: This device
110: shear pin 120: disk
130: Bearing block 140: Upper plate
150: buffer part 151: elastic body
151a: Both ends 151b:
152: support pin 153: adjuster
154: support plates h1, h3, h3: first to third assembly holes
f1: first female thread portion f2: second female thread portion
m1: first male thread portion m2: second male thread portion
152a: first body 152b: second body
5: length adjusting means

Claims (4)

A front end fin 110 having a lower end inserted into the receiving groove 112 formed in the upper surface of the pier 2;
An upper end of a front end fin 110 passing through a center hole 125 penetrating through a disk 120 stacked on the upper surface of the bridge pier 2 is assembled to a lower surface thereof, A bearing block 130;
An upper bearing plate 140 connected to a lower portion of the bridge 3 so as to surround and cover the bearing block 130; And
A cushioning portion 150 elastically absorbing a pressure applied to the side of the upper platen 140 during horizontal movement;
, ≪ / RTI >
The buffer part 150 includes a plate spring type elastic body 151 whose both ends are in contact with the inner surface of the upper pressure plate 140 and whose central part is fixed to the adjacent position of the bearing block 130,
The buffering part 150 includes a first assembly hole h1 formed in a support plate 154 provided at a position adjacent to the bearing block 130 and a second assembly hole h2 formed in the center of the elastic body 151, And one end of the first assembly hole h1 is engaged with and fixed to the first assembly hole h1 so that the central portion of the elastic member 151 is connected to the first assembly hole h1, Further comprising a support pin (152) for fixing to an adjacent position,
The buffering part 150 further includes an adjuster 153 assembled at the other end of the support pin 152 so as to adjust the insertion length of the support pin 152 for adjusting the curvature of the elastic body 151 ,
The surface of the elastic body 151 is galvanized,
The first fitting hole h1 has a first female threaded portion f1 and the adjusting member 153 has a second female threaded portion f2. and a second male threaded portion m2 at the other end so that the first male threaded portion m1 or the second male threaded portion m2 or both of them m1, The length is adjusted,
The length of the second male thread portion m2 is longer than that of the first male thread portion m1,
The adjuster is coupled to the support pin 152 by a nut member in contact with the outer surface of the side plate 144 of the upper pressure plate 140,
The pierced bridge 2 has a non-shrinkable mortar layer 115 formed on the upper surface of the shrinkable mortar layer 115 by recessing the receiving groove 112. The shrinkable mortar layer 115 is formed on the upper surface of the shrink- And a bracket 114 having a groove 116 formed to be recessed to a predetermined depth so that the lower end of the front end fin 110 can be inserted,
The lower end of the shear pin 110 is spaced apart from the bottom surface of the groove 116 by a predetermined distance and the outer diameter of the shear pin 110 is smaller than the inner diameter of the groove 116 Respectively,
A female screw 135 is formed in the central area of the lower surface of the bearing block 130 so that the upper portion of the front end pin 110 passing through the center hole 125 of the disk 120 is inserted into the female screw portion 135. [ The ends are fastened and assembled,
The upper support plate 140 includes an upper plate 142 corresponding to the upper surface of the bearing block 130 and a side plate 144 extending from the outer edge of the upper plate to surround the outer rim of the bearing block 130 Including,
The upper bearing plate 140 is provided with an upper slide plate fixed to the lower surface of the upper plate 142 and a lower slide plate fixed to the upper surface of the bearing block 130,
Wherein the upper and lower slide plates are coated with a lubricant, and the upper and lower slide plates are made of fluororesin.
The method according to claim 1,
The support pins 152 are composed of an outer first body 152a and an inner second body 152b that are coupled to each other and are adjustable in length,
The adjusting pin 152 is provided with a length adjusting means 5 for adjusting the length of the adjusting pin 152 by adjusting the overlapping degree of the first body 152a and the second body 152b,
The length adjusting means 5 includes adjusting protrusions 51 provided on the outer first body 152a and protruding inwardly so that the adjusting protrusions 51 are formed on the outer first body 152a, An elastic member 53 provided inside the access groove 52 and a plurality of elastic members 53 arranged perpendicularly to the inner second body 152b and pushed by the elastic member 53, And a plurality of latching grooves (55) into which the latches (51) are inserted,
The latching groove 55 is a rectangular groove and has four inner walls w1, w2, w3 and w4,
The lower first inner wall w1 and the one side second inner wall w2 of the inner wall of the retaining groove 55 have the first inclined portion s1 and the second inclined portion s2,
Wherein the first and second inclined portions (s1, s2) are formed in a direction of widening the width of the engagement groove (55). The method of claim 2,
A first magnetic portion 61 is provided at an end of the adjusting protrusion 51 and a second magnetic portion 62 is provided at an inner surface of the locking groove 55. The first magnetic portion 61, (w1) is provided with a third magnetic portion (63)
Characterized in that the first magnetic portion (61) and the third magnetic portion (63) are of the same pole and the first magnetic portion (61) and the second magnetic portion (62) Isolation device.
The method of claim 3,
The second magnetic portion 62 includes a fitting protrusion 621 provided at an end portion of the engaging groove 55 side and composed of a head 621a and a column 621b having a smaller width than the head 621a ,
Characterized in that the fitting protrusion (621) is inserted in the inner surface of the locking groove (55) and the fitting groove (551) having the wide portion (551a) for receiving the head (621a) Isolation device.

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