KR100958882B1 - Oil-less bearing - Google Patents

Abstract

The present invention is to install a pull-out resistance member to the anchor bolt mounted on the base plate constituting the oilless bearing so that the oilless bearing is not drawn out of the alternating or pier supporting concrete, so that the oilless bearing can be easily replaced or dismantled The upper plate or the lower plate is formed to be detachably assembled.

Oilless Bearing, Upper Plate, Lower Plate, Anchor Bolt

Description

OIL-LESS BEARING}

The present invention relates to an oilless bearing. More specifically, in the oilless bearing is fixed to the supporting concrete on the upper surface of the alternating or pier by anchor bolts, a pullout resistance member is formed between the anchor bolts so that the oilless bearing embedded in the alternating or pier can be installed more stably. One oilless bearing relates.

Although many types of bridges have been constructed so far, the basic structure is an ABUTMENT installed on both sides of a river (or coast) or a bridge installed in the middle of a river and a bridge installed between the bridge and the bridge. It may be called a SLAB.

In the past, small bridges between complexes were mainly used, but with the development of civil engineering technology, bridges are gradually being enlarged and lengthened.

In these long spanned bridges, the span spans longer and more than tens of meters, and hundreds of meters or more are being constructed.

As the length of bridge becomes longer, that is, the longer the top of the bridge, it can give a sense of stability to vehicles or pedestrians passing on the bridge.However, the bridge deck itself has a dead load, live load, and creep. Deformation and warpage due to stretching and shrinkage are aggravated due to shrinkage, temperature change, wind load, and impact load.

Therefore, the bridge must have a structure that can adequately cope with the deformation and warping, so that the safety and durability can be guaranteed, and in general, a bridge bearing between the bridge upper structure (slab) and the lower structure (shift or bridge) is provided. The bridge is constructed by inserting it.

Generally, bridge supports are installed between bridge decks and bridges or alternating bridges to absorb deformations and torsions of bridge decks and to transfer various loads from bridge decks to bridges or bridges. There are several types developed.

The bridge supports installed on the bridge and used in common have used the improved support type according to the times rather than selecting the support type according to the bridge type.

Recently, in the bridge support of railway bridges, spherical bridge bearings (including high strength brass bridge bearings) dominate rather than pot bearings.

This is because spherical bridge bearings have excellent capacity for rotation because general rail bridges are mainly short-span and have relatively high live loads (weight of trains). This is preferred.

The oilless bridge bearing related to the present invention can be regarded as the same kind as the spherical bridge bearing.

1 and 2 illustrate an example of the assembled state and installation cross-sectional view of the oilless bridge receiving.

First, according to FIGS. 1 and 2, the oilless bridge receiving base plate 10 is fixedly installed on the base concrete 61 of the alternating or pier 60 by an anchor bolt 11,

Hemispherical grooves 21 are formed on the upper surface of the base plate 10 by bolts 12 and receive bearing plates 30 in the center thereof, and fastening jaws 22 protruding upward from both side surfaces thereof are formed. A lower plate 20 including a side block 23 mounted to the outer side of the fastening jaw 22 by bolts 13,

Bearing plate 30 is inserted into the hemispherical groove 21,

It is mounted to accommodate the upper surface of the bearing plate 30, the shear key 43 is formed on the upper surface, the wing wall 41 is formed in the corner portion, the stepped portion 42 in the space blocked out between the wing wall 41 ) Is formed on the upper plate 40,

The upper plate 40 is mounted by the bolt 14, a groove portion (not shown) to be inserted into the lower surface of the shear key 43 of the upper plate 40 is formed and embedded in the bottom of both ends of the bridge girders 70 It is configured to include a soul plate (50, Sole Plate) is installed.

As the oilless bridge bearing is continuously exposed to repeated loads such as a vehicle as time passes, the base plate 10 installed to be embedded in the bearing concrete 61 by the anchor bolt 11 gradually increases due to the pulling force. It could be changed at the setting position and could be the cause of defect of oilless bridge support.

Therefore, when the oilless bridge bearing needs to be replaced due to damage, the lower plate 20, the bearing plate 30, and the upper plate 40 are replaced. For this purpose, the bridge girder 70 is usually used. Lifting means such as a hydraulic jack is installed in the space between the base concrete 61 of the alternating or piers 60 to raise the bridge girder 70 upwards a certain height.

In this state, the damaged lower plate 20, bearing plate 30, the upper plate 40 is dismantled and replaced.

However, in some cases, if there are constraints to prevent lifting the girder 70 for a certain height, a lot of time and effort is required to replace the actual lower plate 20, bearing plate 30, and upper plate 40. There is a need for research and development of a new oilless bearing to solve this problem.

The present invention is for the convenience of removing the defects of the conventional oilless bridge bearings and the replacement of the conventional oilless bridge bearings, specifically, the oilless bridge bearings of the oilless bridge bearing as the conventional oilless bridge bearings are changed to its setting position by the pulling force. The technical problem is to provide a new oilless bearing which can easily replace the oilless bridge bearing while satisfying the constraints for the replacement of the oilless bridge bearing, as well as eliminating defects.

In order to achieve the above object, the present invention was configured as follows.

First, in the base plate 110 installed to be embedded in the anchor bolt 111 in the alternating or pier 60, by binding the anchor bolts 111 to each other to resist the pulling force between the anchor bolts 111 The pull resistance member 200 in the form of a steel sheet can be provided to be mounted.

In addition, considering that the pull-out resistance member 200 is embedded in the base concrete 310 of the final alternating or pier 300 to form a through-hole 210 in the pull-out resistance member 200, which is a steel sheet, pull-out resistance member 200 ) So that the base concrete 310 of the alternating or pier 300 can communicate and be fixed.

In addition, both ends 220 of the pull-out resistance member 200, which is a steel sheet, may be formed in a hemispherical shape or the like according to the outer circumferential surface shape of the anchor bolt 111 so that it may be more easily mounted to the anchor bolt 111. To ensure that.

Second, in forming the upper plate 140 constituting the oilless bridge bearing, by forming the wing wall 141 formed in the corner portion of the upper plate 140 as a prefabricated block to be detachable,

When it is necessary to replace the upper plate 140 of the oilless bridge bearing, the wing wall 141 is dismantled separately and the upper plate 140 can be simply replaced without lifting the bridge girder 500 by a predetermined height or more. To make it possible.

Third, in configuring the lower plate 120 constituting the oilless bridge receiving, the fastening jaw 124 formed on both side portions of the lower plate 120 is also manufactured as a prefabricated block and formed to be detachable,

When it is necessary to replace the lower plate 120 of the oilless bridge bearing, the fastening jaw 124 is dismantled and the lower plate 120 is simply replaced without lifting the bridge girders 500 by a predetermined height or more. I could do it.

The oilless bridge bearing according to the present invention can minimize the phenomenon that the oilless bridge bearing is pulled out even if it is continuously exposed to repeated loads of a vehicle, thereby eliminating the defects.

Maintenance can be easily performed in the replacement, etc., thus enabling more efficient use of the oilless bridge bearing.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Accordingly, such improvements and modifications are within the scope of the present invention as long as they are obvious to those skilled in the art.

BRIEF DESCRIPTION OF THE DRAWINGS In order to describe the present invention more clearly and easily, the following describes the best embodiments of the present invention in detail with reference to the accompanying drawings. Is not limited to the embodiments described below.

First, it looks at the oilless bridge bearing is installed the pull-out resistance member 200 according to the present invention.

3 and 4, the assembled state diagram and the installation cross-sectional view of the oilless bridge receiving member 100 is provided with a pull-out resistance member 200 according to the present invention.

First, the oilless bridge receiving 100 is also large

Anchor bolt 111 is formed on the base plate 110;

Lower plate 120;

Bearing plate 130;

Upper plate 140; And

Soul plate 150 is configured to include.

The base plate 110 is made of steel in the form of a square plate shape is manufactured to be integrally formed anchor bolts 111 extending downward on the bottom of the four corners.

The base plate 110 is a base plate for transferring the load or the pier 300 is transmitted while supporting the upper plate 140, lower plate 120, bearing plate 130 and the soul plate 150 which will be described later It has a function.

The base plate 110 is installed so as to be supported on the support concrete 310 of the alternating or pier 300, as shown in Figure 4, the base plate 110 by the anchor bolt 111 is the upper surface of the support concrete 310 You can see that it is set to.

It can be seen that the four anchor bolts 111 are formed on the base plate 110, and the shape of the anchor bolt 111 is made in the form of a bolt having a larger diameter at the lower end so as to resist the pulling force.

The pull-out resistance member 200 of the present invention is a member mounted between the anchor bolts 111, a plate member having a through hole 221 formed between both ends 210 formed to surround the outer circumferential surface of the anchor bolts 111 ( The one formed by the member 220 formed integrally is used.

At this time, both ends 210 are bent to a semi-circular end in consideration of the outer circumferential surface of the anchor bolt is usually formed in the shape of a rod.

In addition, the through-hole 221 so that the support concrete 310 is hardened in the state that the concrete is in communication when the support concrete 310 is placed as shown in Figure 4 so that the pull-out resistance member 200 is embedded in the support concrete 310 It is.

As a result, the anchor bolts 111 are more firmly fixed to the supporting concrete 310 so as to be reliably resisted to the pulling force generated.

Further, although not shown, the pull-out resistance member 200 is a method such as reinforcing the reinforcing bars through the reinforcing bar through the reinforcement to the reinforcement to the alternating or pier including the supporting concrete or to the reinforcement to the reinforcement resistance member In order to be connected to each other to ensure the integrity of the two.

Thus, if the number of anchor bolts installed in the oilless bearing according to FIG. 1 is 6, the number of anchor bolts according to FIG. It can be seen that.

5A, 5B, and 5C illustrate embodiments of the pull resistance member 200.

Referring to FIG. 5A, the pull resistance member 200 may be identified by the plate member 220 formed at both ends of the semicircular end portions 210. At this time, it can be seen that the semi-circular end 210 can have a configuration in the same direction to surround each front portion of the anchor bolt 111.

According to FIG. 5B, the pull resistance member 200 may be identified by the plate member 220 formed at both ends of the semi-circular end 210. In this case, one side of the semi-circular end 210 may have a side portion of the anchor bolt 111. It can be seen that the other side can have an arrangement form in different directions (perpendicular to each other) to surround the front portion of the anchor bolt 111.

According to FIG. 5C, the semicircular end 210 is a pull-out resistance member 200 formed by the plate member 220 formed at both ends thereof, such that the semicircular end portions 210 surround each front surface of the anchor bolt 111. Have an arrangement of orientation,

In order to secure a more secure fixing state to the anchor bolt 111, the ends of the semi-circular both ends are further extended, and the same shape as the semi-circular end shape integrally with one side extension part 231 corresponding to the extended end. A bolt 112 and a nut (112) to the anchor bolt 111 by using a folding member 230 composed of a body portion 232 and the other side portion 232 extending in contact with the body and integrally formed with the body portion (232) It can be seen that it is also possible to mount 113).

6A and 6B, oilless bearings having a pullout resistance member 200 according to the present invention can be confirmed.

According to Figure 6a, it can be seen that the pull-out resistance member 200 according to Figure 5a to be installed to surround the outer circumferential surface of the anchor bolt 111,

According to Figure 6b it can be seen that the pull-out resistance member 200 is installed to surround the outer circumferential surface of the anchor bolt 111 one by one between the four anchor bolts (111). At this time, one side end of the pull resistance member 200 can be seen that the semi-circular end 210 is installed up and down on one anchor bolt 111, respectively.

The lower plate 120 is also manufactured in the form of a steel plate in the form of a square plate, the central portion is formed with a hemispherical groove portion 121 for receiving the bearing plate 130.

In addition, bolt holes 122 are formed at four corners in contact with the hemispherical groove 121, and are mounted to the base plate 110 by bolts 123 through the bolt holes 122.

In addition, the fastening jaw 124 protruding upwardly is formed on both side portions so that the stepped portion 142 between the wing walls 141 of the upper plate 140 to be described later is accommodated in the fastening jaw 124. do.

As a result, it can be seen that the horizontal movement of the side of the upper plate 140 may be limited by the fastening jaw 124 disposed between the wing walls 141.

In addition, the outer side of the fastening jaw 123 is mounted to the side block 127 is mounted to the bolt 126 through the bolt hole 125 penetrating the fastening jaw 124 end of the upper plate 140 Since the buoyancy is generated in the upper plate 140 by being set to be positioned above the jaw portion 142, the upper plate 140 serves to block the upward movement.

In addition, in the present invention, as described below, the fastening jaw 124 is separated from the lower plate 120 so as to allow horizontal movement of the upper plate 140 in the replacement of the oilless bearing, so that the detachable block can be detached as an assembly block. do.

The bearing plate 130 mainly uses a high-strength brass product as a bearing having a function of transmitting a load from the bridge deck and accommodating horizontal displacement and rotation.

The bearing plate 130 is set such that its lower portion is accommodated in the hemispherical groove portion 121 of the lower plate 120.

The upper plate 140 is also manufactured in the form of a steel plate in the form of a square plate, so as to be made entirely of H-shaped steel plate, the edge portion is formed with a wing wall 141.

In addition, the wing wall 141 is to be blocked out, but the stepped portion 142 is formed.

Accordingly, the stepped part 142 is set to be received inside the fastening step 124 of the lower plate 120 so that the side block 127 is set on the stepped part 142.

It can be seen that the upper plate 140 has a bolt hole 143 is formed to be mounted to the soul plate 150 by the bolt 144.

In addition, a shear key 145 protrudes from the center of the upper surface of the upper plate 140 to be inserted into the shear groove of the soul plate which will be described later to control the horizontal movement.

Thus, the stepped portion 142 between the wing wall 141 of the upper plate 140 is located between the fastening jaw 124 of the lower plate 120, so that the wing wall 141 is caught by the fastening jaw 124 and moves horizontally. Will be controlled.

As will be described later, the wing wall 141 is separated from the upper plate 140 to enable horizontal movement of the upper plate and is detachable to the prefabricated block.

The soul plate 150 is also made of a steel plate in the form of a square plate and is mounted on the bottom of the bridge girder to function as a medium for connecting the bridge girder and the upper plate 140 to each other.

It can be seen that the bolt hole 151 corresponding to the position of the bolt hole 143 formed in the upper plate 140 is formed, the upper plate 140 by the bolt 144 to the soul plate 150 It can be seen that it is mounted.

As a result, it can be seen that the base plate 110, the lower plate 120, the upper plate 140, and the soul plate 150 described above are all mounted in a manner that is fastened to each other by bolts.

Thus, while the oilless bearing functions as a bridge bearing, the bearing plate 130 is damaged as time passes and the defect is required to be replaced.

Such replacement work is usually performed between the supporting concrete and the bridge girder with oilless bearings to operate the lifting means 400 such as a hydraulic jack to raise the bridge girder as shown in FIG. 8A, and then remove the oilless bearings installed and replace the damaged parts. After the oilless bearing is set back to its original position, the elevating means is operated to lower the lifting girder for the bridge.

However, at this time, when raising the girder for the bridge by the lifting means, in particular, in the case of railway bridges may be raised such as not to raise more than 3mm in order to secure the safety.

Therefore, when there is a restriction on the lifting of the bridge girder, when the oil girder bearing is pulled out while the bridge girder is raised to the minimum, the shear key 145 of the upper plate 140 is caught on the soul plate 150. This causes a problem that a very inefficient and inexpensive work such as controlling the traffic may be required to replace the damaged oilless bearing.

7 is a wing wall 141 of the upper plate 140 to facilitate the disassembly of the oilless bearing easily even when the pull-out resistance member 200 according to the present invention is installed and there is a limit on the lifting height of the bridge girder. ) Shows an oilless bearing having a detachable block 148 to be detachable.

That is, according to Figure 7, in the upper plate 140, the front wing wall 141 is separated into two prefabricated blocks 148, mounted to the upper plate 140 by the bolt 147 through the bolt hole 146. It can be seen that.

As a result, the upper plate 140 is manufactured to be detachable to the wing wall 141 as a prefabricated block 148.

As described above, when the wing wall 141 is detachable to the prefabricated block, the replacement type of the oilless bearing will be described in detail with reference to FIGS. 8A to 8B.

According to FIG. 8A, the prefabricated block 148 is mounted on the upper plate 140 while the oilless bearing mounted on the upper plate 140 is installed between the supporting concrete 310 and the bridge girder 500. It can be seen that the bolt 147 attached to the 140 is released and separated from the upper plate 140.

According to FIG. 8B, the lower plate 120 and the bearing plate 130 are first sided by separating the bolt 123 that restrains the base plate 110 and the lower plate 120 while the prefabricated block 148 is separated. You can see that you can pull out.

That is, the lower plate 120 is a stepped portion 142 between the wing wall 141 of the upper plate 140 as shown in Figure 3 was bound to the horizontal movement by the fastening jaw 121 of the lower plate 120 By separating the wing wall 141 from the upper plate 140, the restraint is released so that the lower plate 120 can be moved out to the side.

According to FIG. 8C, the lower plate 120 and the bearing plate 130 are separated and pulled out to the side, so that only the upper plate 140 mounted on the base plate 110 and the soul plate 150 remains. .

8D and 8E, in order to separate the remaining upper plate 140 from the soul plate 150, loosen the bolt 144 for mounting the soul plate 150 to the upper plate 140 and eventually the upper plate ( 140) can be taken out.

The lower plate 120, the bearing plate 130, and the damaged upper plate 140 are partially replaced with each other in reverse order to replace the oilless bearings, and then the elevating means 400 is removed to remove the oilless bearings. It can be seen that it is possible to overcome the raise height constraint of bridge girders in the replacement work.

As described above, obstructing the horizontal movement of the lower plate 120 may be due to the presence of the fastening jaw 124 of the lower plate 120.

Accordingly, it can be seen that by separating the fastening jaw 124 from the lower plate 120 to the prefabricated block 129, it is also possible to enable the horizontal movement of the lower plate 120 side.

That is, a bolt hole is formed in the prefabricated block 129 that is a fastening jaw formed at both side portions of the lower plate 120, and the prefabricated block 129 is formed by using the bolt 128 in the bolt hole. Desorption is possible.

When the oilless bearing needs to be replaced, the bolt 128 is released to separate the prefabricated block 129 that is a fastening jaw, and the bolt 123 that restrains the base plate 110 and the lower plate 120 is loosened. In this state, the lower plate 120 can be pulled out to the side, and in turn, the bearing plate 130 and the upper plate 140 can be separated.

1 and 2 is an assembled perspective view and an installation cross-sectional view of a conventional oilless bearing.

3 and 4 are assembled perspective views and installation cross-sectional view of the oilless bearing according to the present invention.

5A, 5B and 5C show embodiments of the pull resistance member according to the present invention.

6A and 6B illustrate an oilless bearing having a pullout resistance member according to the present invention.

7 is an assembled perspective view showing that the wing wall of the upper plate is detachably assembled in the oilless bearing according to the present invention.

8A, 8B, 8C, 8D and 8E schematically illustrate replacement models of the oilless bearing according to the present invention in order.

9 is an assembled perspective view showing that the wing wall of the lower plate is assembled detachably in the oilless bearing according to the present invention.

<Description of the symbols for the main parts of the drawings>

100: oilless bearing

110: base plate 111: anchor bolt

120: lower plate 124: fastening chin

130: bearing plate 140: upper plate

150: soul plate

200: pull-out resistance member 300: shift or pier

310: supporting concrete 400: lifting means

500: bridge girder

Claims (7)

Base plate installed to extend the anchor bolt to the bottom A lower plate having a hemispherical groove formed on the upper surface of the base plate and formed with a hemispherical groove for accommodating a bearing plate on an upper surface of the central plate and protruding upwardly from which fastening jaws are mounted; A bearing plate having a lower portion accommodated in the hemispherical groove; And An oilless bearing comprising: an upper plate having a wing wall formed at an edge portion and a stepped portion formed at a block-out portion between the wing walls in an H-shaped rectangular plate shape accommodating the upper portion of the bearing plate. At least one pull resistance member including a steel plate fixed at both ends between the anchor bolts is installed to be embedded in at least one alternating or pier so that the base plate is not drawn out from the alternating or pier. The pull-out resistance member is a member integrally formed with a plate formed with a through-hole between both ends formed to surround the outer peripheral surface of the anchor bolt, The pull resistance member is formed in a semi-cylindrical both ends to surround the outer circumferential surface of the anchor bolt, and the reinforcing bars through the reinforcing bars through the reinforcement to be integrated with the reinforcing bars in the alternating or pier including the supporting concrete Reinforcing bars are connected to each other by welding to the pull resistance member, To prevent the semi-cylindrical end surrounding the anchor bolt from being separated from the anchor bolt, a folding member having a shape corresponding to the end of the semi-cylindrical shape is further installed at both ends of the pull-out resistance member by the bolt under nut with the anchor bolt interposed therebetween. Oilless bearing characterized in that the. delete delete delete The oilless bearing according to claim 1, wherein the wing of the upper plate is fastened to and detached from the upper plate by a bolt as a prefabricated block. 6. The oilless bearing according to claim 5, wherein at least two of the ends of the upper plate are formed. The oilless bearing according to claim 1, wherein the side portion of the lower plate is fastened and detached by bolts to the lower plate as a prefabricated block.

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