Gap Control System for Rail-Type Expansion Joint

Abstract

The present invention aims to provide a gap control system for a rail-type expansion joint. That is, the present invention is characterized by comprising: a fixed bracket (10) which is positioned oppositely to each other on the lower part of a rail (1) of a rail-type expansion joint device installed in a bridge deck connection part, and which has a through hole (11) formed in the transverse direction; a rod (20) which is installed through the through hole (11) and which has a movable bracket (21) at its end secured by a nut (22); a center elastic body (30) which has a first through hole (31) formed to be inserted into the rod (20) and is positioned between a pair of fixed brackets (10) to absorb contraction movement force between the rails (1); and a side elastic body (40) which has a second through hole (41) formed to be inserted into the rod (20) and is positioned between the fixed bracket (10) and the movable bracket (21) to absorb extension movement force between the rails (1). Using the gap control system for the rail-type expansion joint described above has the advantage of uniformly controlling the range of elongation behavior between rails and preventing damage caused by excessive compression of the side elastic body.

Description

Technology Field

[0001] The present invention relates to a gap control system for a rail-type expansion joint, and more specifically, to a gap control system for a rail-type expansion joint that is installed at a bridge deck connection part and can effectively absorb the expansion and contraction behavior of the bridge. Background Technology

[0002] Generally, bridges contract or expand due to seasonal temperature changes, so they are installed with a certain spacing between adjacent decks to account for this, and expansion joints are installed in the spacing between the bridge decks.

[0003] The above expansion joint device is intended to ensure safe vehicle passage by accommodating the contraction of the bridge deck and to prevent foreign substances and rainwater from falling to the underside of the bridge. The present invention proposes a spacing member for maintaining a constant rail spacing, which is used in a rail-type expansion joint device suitable for a wide range of expansion due to its wide spacing.

[0004] In Korean Registered Patent Publication No. 10-0380422, a bridge expansion joint device capable of maintaining a constant rail spacing is disclosed. This device comprises an end transverse member fixed to both ends of a bridge deck supported by a bridge pier and a rubber sealing inserted between the end transverse member and expanded. In this device, a web is formed on the lower part of the transverse member to which a bolt is coupled, and between the webs, a plate spring, having both ends connected by a pin and a bolt hole drilled in the center, is bolted to the bolt on the web by a separate nut. However, the aforementioned prior art has a high frictional vibration noise due to metal friction, it is difficult to dampen the vibrations that occur every time a vehicle passes over the bridge, and the size of the rainwater catcher (sealing material) is inevitably limited due to the installation position of the plate spring.

[0005] Accordingly, the applicant has previously registered a technology in registered patent No. 10-1744909 comprising: a pair of brackets formed at mutually facing positions on the lower part of a rail installed spaced apart from the deck of an adjacent bridge and having a through hole formed in the center; a rod formed with screw threads inserted into the through hole of the bracket and having nuts fastened at both ends; a center spacer located between the pair of brackets and coupled through the rod; a support plate connected to the opposite side of the side spacer in contact with the side spacer bracket located on the side of each of the two brackets while coupled through the rod; and a nut fastened to the rod exposed through a fastening hole drilled in the center of the support plate; wherein the center spacer and the side spacer are made of high-density urethane foam. However, the elongation movement force of the expansion joint device is not uniformly distributed to multiple rail sides and may be concentrated on one side, potentially causing damage to the side spacer. Prior art literature

[0006] (Patent Document 0001) KR 10-0380422 B1(Patent Document 0002) KR 10-1744909 B1 The problem to be solved

[0007] The present invention aims to solve the problem of providing a gap control system that improves the durability and reliability of the entire structure by creating a new technology to solve the various problems of the aforementioned conventional technology, and by enabling the center elastic body and the side elastic body to effectively absorb contraction and elongation behavior forces at their respective positions in response to impact and repetitive loads caused by expansion displacement between rails.

[0008] In addition, the purpose is to provide a gap control system for a rail-type expansion joint device that includes a gap control member to prevent the gap between rails from widening excessively during expansion movement, thereby uniformly distributing the expansion movement range of the entire rail system and limiting the compression ratio of the side elastic body to prevent damage to the elastic body. means of solving the problem

[0009] In the present invention, as a specific means for solving the problem of the above-mentioned invention, a gap control system for a rail-type expansion joint is configured, comprising: a fixed bracket (10) which is positioned oppositely to each other on the lower part of a rail (1) of a rail-type expansion joint installed at a bridge deck connection part, and which has a through hole (11) formed in the transverse direction; a rod (20) which is installed through the through hole (11) and which has a movable bracket (21) at its end secured by a nut (22); a center elastic body (30) which has a first through hole (31) formed to be inserted into the rod (20) and is positioned between a pair of fixed brackets (10) to absorb contraction movement force between the rails (1); and a side elastic body (40) which has a second through hole (41) formed to be inserted into the rod (20) and is positioned between the fixed bracket (10) and the movable bracket (21) to absorb extension movement force between the rails (1).

[0010] Additionally, a gap control member (50) is provided to limit the extension range and the compression rate of the side elastic body (40) between the rails (1), and the gap control member (50) is characterized by including a gap sleeve (51) having one end connected to a movable bracket (21) and the other end extending toward a fixed bracket (10), and a compression chamber (52) formed to partially accommodate the side elastic body (40) within the gap sleeve (51).

[0011] In addition, the center elastic body (30) and the side elastic body (40) are positioned in a predetermined compressed state during initial installation, and are configured such that even when the center elastic body (30) or the side elastic body (40) is in a state of maximum compression due to contraction behavior, the side elastic body (40) or the center elastic body (30) maintains a predetermined expanded state so that the rod (20) is not exposed to the outside. Effects of the invention

[0012] According to the specific means for solving the above-described problem, the present invention has the effect of improving the durability and vibration reduction effect of a rail-type expansion joint device by having the center elastic body and the side elastic body respectively correspond to absorb the contraction and elongation forces caused by the impact and repetitive loads resulting from the expansion displacement between rails.

[0013] In particular, since the center elastic body is configured to primarily handle the load in the contraction direction and the side elastic bodies to absorb the load in the elongation direction, the displacement load acting on the expansion joint can be distributed in a dual manner. This effectively prevents uneven wear and induces balanced behavior of the entire system.

[0014] In addition, a gap control member is provided to control the gap between rails, allowing the range of elongation behavior between rails to be maintained consistently. As a result, the compressive load applied to the side elastic body is not excessively concentrated, which prevents damage to the elastic body and offers the advantage of excellent long-term durability. Brief explanation of the drawing

[0015] FIG. 1 is a bottom perspective view showing a preferred embodiment of a gap control system for a rail-type expansion joint device provided by the present invention. FIG. 2 is a configuration diagram showing an enlarged view of a key part of a gap control system for a rail-type expansion joint device according to an embodiment of the present invention. FIG. 3 is a configuration diagram showing a gap control system for a rail-type expansion joint device according to an embodiment of the present invention from the bottom view. FIG. 4 is a configuration diagram showing the rail contraction behavior state of a gap control system for a rail-type expansion joint device according to an embodiment of the present invention. FIG. 5 is a configuration diagram showing the elongation behavior state of a gap control system for a rail-type expansion joint device according to an embodiment of the present invention. Specific details for implementing the invention

[0016] The present invention will be described in more detail below according to specific embodiments of the attached drawings. The technical terms used in this specification are selected in consideration of their functions in the embodiments, and the meanings of these terms may vary depending on the specific embodiments of the invention. Furthermore, throughout the specification, when a part is described as being "connected" to another part, this includes not only cases where they are "directly connected," but also cases where they are "indirectly connected" with other members interposed between them. Additionally, expressions indicating directions such as "up, down, front, back" used in the following description are defined based on the drawings, and the shape and position of each component are not limited by these terms.

[0017] FIG. 1 is a bottom perspective view showing a preferred embodiment of a gap control system for a rail-type expansion joint device according to the present invention, FIG. 2 is a cross-sectional view showing an enlarged view of a key part of a gap control system for a rail-type expansion joint device according to an embodiment of the present invention, and FIG. 3 shows the gap control system in a bottom state.

[0018] The present invention relates to a system configured to effectively absorb shocks and repetitive loads caused by expansion and contraction displacement between rails and to stably maintain the gap between rails, characterized in that the center elastic body absorbs the contraction direction behavior and the side elastic bodies absorb the elongation direction behavior within a limited range, thereby improving the durability and reliability of the entire system.

[0019] To enable such a function, the main components include a fixed bracket (10), a rod (20), a center elastic body (30), and a side elastic body (40), and each component is described in detail below.

[0020] First, the fixing bracket (10) according to the present invention is positioned opposite each other on the lower part of the rail (1) of the rail-type expansion joint device installed in the bridge deck connection part, and a through hole (11) is formed in the transverse direction.

[0021] The above-mentioned fixed brackets (10) are each installed on adjacent rails (1) and arranged to face each other and configured to be connected by a rod (20) described later.

[0022] Additionally, the rail (1) equipped with the above-mentioned fixing bracket (10) is configured to be connected to another adjacent rail (1) in the same manner by the fixing bracket (10) and the rod (20).

[0023] Meanwhile, the space between the above rails (1) is provided to be finished by a waterproof membrane including a rubber plate.

[0024] The rod (20) according to the present invention is installed through the through hole (11) and is configured so that a movable bracket (21) at the end is fastened and restrained by a nut (22).

[0025] The above rod (20) may be configured in the shape of a long bolt with a head portion formed at one end and a male screw portion formed at the other end, or in the shape of a rod rod with male screw portions formed at both ends.

[0026] The rod (20) configured in this manner connects a pair of opposing fixed brackets (10) and simultaneously restrains the center elastic body (30) and side elastic body (40), which will be described later and are placed on the rod, thereby performing the role of controlling the expansion and contraction behavior of the entire system.

[0027] FIG. 4 is a configuration diagram showing the rail contraction behavior state of a gap control system for a rail-type expansion joint device according to an embodiment of the present invention, and FIG. 5 is a configuration diagram showing the extension behavior state of a gap control system.

[0028] The center elastic body (30) according to the present invention has a first through hole (31) formed so as to be inserted into the rod (20), and is positioned between a pair of fixed brackets (10) to absorb contraction movement force between rails (1).

[0029] The above center elastic body (30) is formed from an elastic member including rubber, urethane, and a coil spring.

[0030] As shown in Fig. 4, when a contraction movement force acts between rails (1) and the gap between a pair of fixed brackets (10) is reduced, the center elastic body (30) is compressed and configured to absorb the contraction movement force.

[0031] The side elastic body (40) according to the present invention has a second through hole (41) formed so as to be inserted into the rod (20), and is positioned between the fixed bracket (10) and the movable bracket (21) to absorb the elongation movement force between the rails (1).

[0032] The above-mentioned side elastic body (40) may be formed from an elastic block or an elastic spring including rubber or urethane. For example, FIG. 2(a) shows a state in which the side elastic body (40) is composed of an elastic block, and FIG. 2(b) shows a state in which the side elastic body (40) is applied as an elastic spring.

[0033] These side elastic bodies (40) are configured so that when an elongation movement force acts between rails (1) as shown in FIG. 5 and the gap between a pair of fixed brackets (10) expands, the side elastic bodies (40) are compressed and can absorb the elongation movement force.

[0034] In this way, the center elastic body (30) and the side elastic body (40) are arranged in a state where they are fitted in series on the rod (20), so as to effectively absorb the expansion and contraction forces occurring between the rails (1).

[0035] In addition, the center elastic body (30) and the side elastic body (40) are placed in a predetermined compressed state during initial installation.

[0036] For example, as shown in FIG. 4, even when the center elastic body (30) is in a state of maximum compression due to contraction behavior, the side elastic body (40) maintains a predetermined expansion state so that the rod (20) is not exposed to the outside, and as shown in FIG. 5, even when the side elastic body (40) is in a state of maximum compression, the center elastic body (30) is expanded so that the rod (20) is not exposed to the outside.

[0037] This configuration can improve the durability and stability of the entire system by preventing corrosion and fatigue cracking of the rod (20) and suppressing loosening of the fastening due to repeated loading, and since the impact load transmitted through the center elastic body (30) is dampened stepwise at the contact surface between the side elastic body (40) and the bracket, the shock absorption performance is improved compared to a single elastic body structure and the cushioning effect against repeated loading can be exhibited more effectively.

[0038] In addition, as shown in FIG. 4, even when the center elastic body (30) is in a state of maximum compression, the side elastic body (40) maintains contact with the fixed bracket (10) and the movable bracket (21), thereby mechanically restricting the axial fine movement of the rod (20) and ensuring positional stability of the fastening part.

[0039] The present invention is characterized by further comprising a gap control member (50) that limits the elongation range and the compression rate of the side elastic body (40) between the rails (1).

[0040] Referring to FIG. 2, the gap control member (50) includes a gap sleeve (51) having one end connected to a movable bracket (21) and the other end extending toward a fixed bracket (10), and a compression chamber (52) formed to partially accommodate a side elastic body (40) within the gap sleeve (51).

[0041] The gap sleeve (51) is formed as a circular tube, and a circular compression chamber (52) is formed inside to accommodate the side elastic body (40).

[0042] When the rail (1) undergoes an elongation movement, the fixed bracket (10) comes into contact with the gap sleeve (51) at a predetermined position to mechanically limit the range of elongation movement between the rails, thereby maintaining a constant elongation movement interval between the multiple rails (1).

[0043] Accordingly, a uniform compressive load is applied to the side elastic body (40), and the maximum amount of compression of the side elastic body (40) is limited by the gap sleeve (51), thereby effectively preventing damage caused by excessive compression.

[0044] The present invention, configured as described above, relates to a rail-type expansion joint device installed at a bridge deck connection section. By improving the device to efficiently absorb impact and repetitive loads caused by expansion displacement between rails and to stably maintain the spacing between rails, it can be reliably applied to expansion joint devices of bridge structures subject to frequent temperature changes and repetitive loads. Furthermore, since it enables long-term durability and reduced maintenance costs through load distribution between rails and protection of the elastic body, it has high industrial utility value in the fields of civil engineering structures and infrastructure facilities.

[0045] As described above, the detailed description of the present invention has explained the most preferred embodiment of the present invention, but various modifications are possible within the scope of the technical scope of the present invention. Accordingly, the scope of protection of the present invention should not be limited to the above embodiment, but should be recognized to include the technologies of the claims described below and equivalent technical means derived from these technologies. Explanation of the symbols

[0046] 1: Rail 10: Fixing bracket 11: Through hole 20: Rod 21: Movable bracket 22: Nut 30: Center elastic body 31: First penetration hole 40: Side elastic body `41: Second penetration hole 50: Gap control member 51: Gap sleeve 52: Compression chamber

Claims

Claim 1 A fixed bracket (10) positioned opposite each other on the lower part of a rail (1) of a rail-type expansion joint device installed at a bridge deck connection part, with a through hole (11) formed in the transverse direction; a rod (20) installed through the through hole (11) and configured such that a movable bracket (21) at its end is restrained by a nut (22); a center elastic body (30) configured such that a first through hole (31) is formed to be inserted into the rod (20) and is positioned between a pair of fixed brackets (10) to absorb contraction movement force between the rails (1); and a side elastic body (40) configured such that a second through hole (41) is formed to be inserted into the rod (20) and is positioned between the fixed bracket (10) and the movable bracket (21) to absorb extension movement force between the rails (1).The structure includes, wherein the center elastic body (30) and the side elastic body (40) are arranged in series and configured to absorb contraction and elongation movement forces according to the expansion displacement between the rails (1), and a gap control member (50) is provided to limit the elongation movement range and the compression ratio of the side elastic body (40) between the rails (1). The gap control member (50) includes a gap sleeve (51) formed as a circular tubular body with one end connected to a movable bracket (21) and the other end extending toward a fixed bracket (10), and a compression chamber (52) formed to partially accommodate the side elastic body (40) within the gap sleeve (51). When the rail (1) undergoes elongation movement, the fixed bracket (10) comes into direct contact with the end of the gap sleeve (51) at a predetermined position to mechanically limit the elongation movement range between the rails. Through this, the gap sleeve (51) A gap control system for a rail-type expansion joint device, characterized in that the maximum compression amount of the side elastic body (40) is configured to be mechanically limited, and the center elastic body (30) and the side elastic body (40) are positioned in a predetermined compression state upon initial installation so that the rod (20) is not exposed to the outside even when the center elastic body (30) or the side elastic body (40) is in a state of maximum compression according to contraction behavior, and the axial fine movement of the rod (20) is mechanically limited by maintaining the state in which the side elastic body (40) is in contact with the fixed bracket (10) and the movable bracket (21) even when the center elastic body (30) is in a state of maximum compression, and the center elastic body (30) and the side elastic body (40) are elastic blocks formed of rubber or urethane. Claim 2 delete Claim 3 delete Claim 4 delete

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