One-Touch Joint Fastening Apparatus and Cross beam Construction Method for Bridges Using the Same

Abstract

The present invention relates to a one-touch joint fastening device and a method for constructing a crossbeam of a bridge using the same. The method involves temporarily joining the crossbeam without using a crane until the crossbeam is fixed to the mold by fastening bolts, and in particular, temporarily joining the crossbeam to the mold through a single process of inserting the crossbeam between the molds. The one-touch joint fastening device according to the present invention comprises: a fixing bar (10) installed on each facing portion of molds (1) spaced apart from each other at a certain distance; a joint (20) installed on each side in the longitudinal direction of a cross beam installed between the molds in a direction traversing the molds, which is coupled to the fixing bar in a snap-fit ​​manner to fasten the cross beam; and a brake (30) that restrains the joint so that the cross beam does not fall downward while coupled to the mold. The joint comprises a joint body (21) on one side which is rotatably coupled to the cross beam, and a fastening groove (22) formed on the other side of the joint body in the shape of a groove that is open to the outside, into which the fixing bar is inserted to rotate the joint body when the cross beam descends along between the molds.

Description

Technology Field

[0001] The present invention relates to a joint fastening device for temporarily fixing a crossbeam of a temporary bridge, and more specifically, to a one-touch joint fastening device for rapidly fastening a main form and a crossbeam of a temporary bridge without using welding equipment, and a method for constructing a crossbeam of a bridge using the same. Background Technology

[0002] Generally, when constructing or repairing and reinforcing structures that cross rivers, roads, railways, etc., a temporary bridge is installed to move work vehicles, equipment, and personnel prior to the construction of the structure.

[0003] Such temporary bridges generally have a structure in which multiple main girders are arranged in parallel along the longitudinal direction of the bridge, and then a deck or work platform is installed on top of them.

[0004] Meanwhile, with the mold structure described above alone, it is difficult to maintain the spacing between molds, and there is a risk that the molds may be displaced laterally or twisted due to load eccentricity, movement of work vehicles, wind load, or vibration during construction.

[0005] Accordingly, in the past, a technique has been used to install cross beams between the main girders to secure the bonding strength between the main girders and to increase the lateral stiffness and stability of the entire temporary bridge.

[0006] Conventional crossbeam installation methods require individual fixing of crossbeams from the top or side of the mold using methods such as bolt fastening or welding, which takes a long time to install and poses a high risk of safety accidents for workers due to the need for high-altitude work. Additionally, while fixing the crossbeams, equipment such as cranes must be used to lift them (or two or more workers must lift, transport, and install the crossbeams), which increases crane rental costs and ultimately results in high construction costs and prolonged construction periods.

[0007] Therefore, there is a need to develop improved transverse beam installation technology that allows for the rapid and safe installation of transverse beams between the main girders constituting a temporary bridge, while ensuring structural stability and flexibly responding to changes in construction conditions.

[0008] Registered Patents No. 10-2556143 and No. 10-2474998 only include the technology of fixing the cross beam and the mold with bolts. Prior art literature

[0009] Registered Patent No. 10-2556143 Registered Patent No. 10-2474998 The problem to be solved

[0010] The present invention aims to solve the aforementioned problems by providing a one-touch joint fastening device that temporarily joins the crossbeam to the mold without using a crane until the crossbeam is fixed by bolt fastening, and in particular, a method for constructing a crossbeam of a bridge using the same, which temporarily joins the crossbeam to the mold through a single process of inserting the crossbeam between the molds. means of solving the problem

[0011] The one-touch joint fastening device according to the present invention comprises: a fixing bar installed on each facing portion of molds spaced apart from each other at a certain distance; a joint installed on each side in the longitudinal direction of a cross beam installed between the molds in a direction traversing the molds, which is coupled to the fixing bar in a snap-fit ​​manner to fasten the cross beam; and a brake that restrains the joint so as not to fall downward while the cross beam is coupled to the mold, wherein the joint is formed in the shape of a groove that is rotatably axially coupled to the cross beam and is open to the outside, and includes a fastening groove into which the fixing bar is inserted to rotate the joint body when the cross beam descends along between the molds. Effects of the invention

[0012] According to the one-touch joint fastening device and the method for constructing a crossbeam of a bridge using the same, when inserting the crossbeam between the molds, the crossbeam is coupled to the mold through the joint, and even when the crane lifting the crossbeam is separated from the crossbeam, the state of temporary coupling between the crossbeam and the mold is maintained, and the fastening holes of the mold and the crossbeam are aligned. Therefore, the time of crane operation can be significantly reduced compared to the conventional method of lifting the crossbeam with a crane until the bolt is fastened, thereby reducing costs and shortening the construction period.

[0013] Similarly, during the dismantling of a temporary bridge, the crossbeam and the main formwork maintain a temporary connection through the joint while the fasteners are released, which not only reduces crane usage time but also effectively prevents worker accidents caused by the crossbeam falling off.

[0014] In addition, when inserting the cross beam between the molds, the joint installed on the cross beam connects to the fixing bar installed on the mold with a one-touch mechanism without the need for separate work, making the temporary connection of the cross beam very easy. Brief explanation of the drawing

[0015] FIG. 1 is a perspective view of a one-touch joint fastening device according to the present invention, showing a state in which it is installed on a mold and a cross beam, respectively. FIG. 2 is an exploded perspective view of a one-touch joint fastening device according to the present invention. FIG. 3 is a perspective view of a state in which a mold and a cross beam are combined through a one-touch joint fastening device according to the present invention. FIG. 4 is a construction process diagram of a temporary bridge crossbeam using a one-touch joint fastening device according to the present invention. FIG. 5 is a drawing showing the operation of a one-touch joint fastening device according to the present invention. Specific details for implementing the invention

[0016] In the following description of the present invention, specific descriptions of related known functions or configurations will be omitted if it is determined that such descriptions would unnecessarily obscure the essence of the invention. Furthermore, the terms described below are defined in consideration of their functions within the present invention, and these definitions may vary depending on the intentions or practices of the user or operator. Therefore, such definitions should be based on the content throughout this specification.

[0017] First, the present invention is very useful for the installation of crossbeams of temporary bridges, but it is not necessarily limited to temporary bridges.

[0018] As shown in FIGS. 1 to 3, the one-touch joint fastening device according to the present invention comprises a fixed bar (10) installed on a mold (1), a joint (20) installed on a cross beam (2) that supports adjacent molds (1) and coupled to the fixed bar (10), and a brake (30) that restrains the joint (20) to maintain the cross beam (2) in a position coupled to the mold (1).

[0019] The present invention is applied to a mold (1) and a cross beam (2) that are conventionally used, that is, the mold (1) and the cross beam (2) are shown as ready-made products with a cross-section, but are not limited thereto.

[0020] The fixed bar (10) can be installed at the location of the stiffener (3) installed in the mold (1).

[0021] A stiffener (3) is pre-installed in the mold (1) for reinforcement, and a fixing bar (10) may be installed on the stiffener (3) installed in the mold (1), or a separate stiffener may be additionally installed for the installation of the fixing bar (10). The stiffener (3) may be configured so that the part where the fixing bar (10) is installed protrudes to the outside of the mold (1).

[0022] The stiffener (3) may include a hole into which a part of the fixing bar (10) is inserted.

[0023] The fixed bar (10) is preferably a rod with a circular shape to match the rotating joint (20), and one end can be inserted into a hole formed in the stiffener (3) and then fixed by welding.

[0024] The fixing bar (10) may have a uniform cross-sectional area throughout, or may include a projection at the end to prevent the joint (20) from falling off.

[0025] The fixed bar (10) is installed on the opposite side of adjacent molds (1) connected to the cross beam (2) as a set of two.

[0026] The joint (20) includes a joint body (21) that is axially coupled to the cross beam (2), and a fastening groove (22) formed in the joint body (21) into which a fixing bar (10) is inserted.

[0027] The joint body (21) has a square or circular cross-section (preferably a rectangular shape with a length greater than the width) and includes an axle hole at the opposite end of the fastening groove (22), and is rotatably installed on an axle (23) fixed to the cross beam (2) through the axle hole. Of course, it is also possible for the joint body (21) to have an axle and include an axle hole through which the axle is rotatably installed on the cross beam (2).

[0028] It is preferable that the joint body (21) has a portion with a fastening groove (22) located below the shaft (23), so that the shaft (23) is eccentric.

[0029] The fastening groove (22) is formed at the end opposite the shaft hole of both longitudinal sides of the joint body (21), and an opening is formed through which the fixing bar (10) can be inserted or removed.

[0030] It is preferable that the joint (20) be configured to be inserted into the fastening groove (22) without performing any separate work during the process of the joint (20) descending together with the cross beam (2), and as described above, the joint body (21) is set to an initial position of downward inclination as it moves toward the fastening groove (22) through an eccentric axis (23), and at this time, the lower locking part (25) among the upper and lower locking parts (24, 25) formed on the upper and lower sides of the fastening groove (22), respectively, so that the opening of the fastening groove (22) is positioned above the fastening groove (10), is formed shorter than the upper locking part (24).

[0031] The upper locking part (24) is a rotation guide that rotates the joint (20) by the fixed bar (10), which is a fixed body, when descending together with the horizontal beam (2).

[0032] Additionally, the joint (20) includes an alignment surface (26) and a braking surface (27) for initial position alignment and braking when the cross beam (2) is installed perpendicular to the mold (1).

[0033] The alignment surface (26) is formed in a curved (chamfered) shape on the lower edge of the joint body (21) and is initially supported by the brake (30) to align the joint (20) so that it tilts.

[0034] The braking surface (27) is formed in a straight line and is supported by the brake (30) to prevent the joint (20) from rotating further by determining the joint position of the cross beam (2) and the mold (1).

[0035] The brake (30) is fixed to the cross beam (2) in the rotation path of the joint (20), and causes the joint (20) to stop and not rotate when the braking surface (27) of the joint (20) is supported. Of course, due to the structure of the joint (20), the joint (20) rotates in the opposite direction (the upward direction in which the cross beam (2) is removed from the mold (1)) while being supported by the brake (30).

[0036] The brake (30) must not be deformed or detached by the load applied through the joint (20), and is not limited to the cross-section shown in the drawing.

[0037] Additionally, the fixed bar (10) and the joint (20) temporarily connect the cross beam (2) to the mold (1), and a fixed plate (40) is included to connect the cross beam (2) to the mold (1) without moving it while it is in this temporarily connected state.

[0038] The fixing plate (40) includes a fixing plate body (41) that is attached to the front or back surface of the stiffener (3) and fixed to the stiffener (3) by a fastener (44) (bolt and nut, etc.), a support part (42) that extends along the transverse direction (direction toward the cross beam (2)) at the bottom of the fixing plate body (41) and is seated on the bottom of the cross beam (2), and a reinforcing part (43) that is formed with a cross-sectional area wider than that of the reinforcing plate body (41) on at least one side of the top of the fixing plate body (41) and the support part (42).

[0039] The stiffener (3) and the fixing plate (40) are joined by fastening a fastener (44) for installation and removal, and each includes, for example, four fastening holes (3-1, 41-1), and when the cross beam (2) is aligned at the joint position, the fastening holes (3-1, 41-1) of the stiffener (3) and the fixing plate body (41) match each other.

[0040] By using a separate fixing plate (40), it is possible to prevent the horizontal beam (2) from being damaged by drilling a fastening hole in the horizontal beam (2).

[0041] The fixing plate (40) can be fixed to the cross beam (2) by welding, and at this time, a separate welding plate can be attached to the reinforcing part (43) and the cross beam (2) and then fixed by welding.

[0042] A construction method for a temporary bridge (transverse beam) including a one-touch joint fastening device according to the present invention is as follows.

[0043] 1. Mold installation (Fig. 4 (A)).

[0044] Two or more main molds (1) are installed at regular intervals along the width direction of the temporary bridge on the lower foundation (temporary bent) of the temporary bridge.

[0045] At this time, the fixed bars (10) installed on each of the two adjacent molds (1) face each other.

[0046] 2. Installation of horizontal beams (Fig. 4 (B)).

[0047] a. Mounting on the horizontal beam.

[0048] A cross beam (3) is placed between adjacent molds (1). At this time, the opening of the fastening groove (22) of the joint (20) is positioned directly above the fixing bar (10), and thus, the upper locking part (25) is positioned above the fixing bar (10).

[0049] b. Transverse beam descent ((C) of Fig. 4).

[0050] When the horizontal beam (2) is lowered, the upper locking part (24) of the joint (20) comes into contact with the fixed bar (10). At this time, since the fixed bar (10) is a fixed body, the upper locking part (24) cannot descend below the fixed bar (10), thereby rotating the joint (20).

[0051] When the joint (20) rotates and the braking surface (27) is supported by the brake (30), the joint (20) can no longer rotate, and consequently, the cross beam (2) can no longer descend.

[0052] 3. Connection between the mold and the transverse beam ((D) of FIG. 4).

[0053] As shown in FIG. 5, as a result of the entire process, the fastening holes (3-1, 41-1) of the stiffener (3) and the fixing plate (40) naturally align, and a fastener (44) is fastened thereto.

[0054] 4. Installation of deck (temperature board) ((D) of Fig. 4).

[0055] After combining the mold (1) and the cross beam (2) with a fastener (44), a deck (4) is installed on the mold (1).

[0056] The method for removing a temporary bridge (transverse beam) including a one-touch joint fastening device according to the present invention is as follows. Since it can be carried out in the reverse order of FIG. 4, the drawing is omitted.

[0057] 1. Deck removal.

[0058] A deck (4) is installed. This secures space to remove the crossbeam (2) upward.

[0059] 2. Release of fastener.

[0060] The fastener (44) that fixed the cross beam (2) to the mold (1) is released to release the connection between the mold (1) and the cross beam (2).

[0061] 3. Removal of crossbeams.

[0062] When the horizontal beam (2) is raised upward, the joint (20) rotates toward the fixing bar (10) due to its own weight, and in this process, the fastening groove (22) moves to a position higher than the fixing bar (10), thereby releasing the connection between the fixing bar (10) and the joint (20).

[0063] The cross beam (2) is raised higher than the molds (1) and removed from the mold (1).

[0064] Next, the temporary bridge is removed by removing the mold (1) and the lower foundation. Explanation of the symbols

[0065] 1: Mold, 2: Horizontal beam 3: Stiffener, 3-1, 41-1: Fastening hole 10: Fixed bar, 20: Joint 21: Joint body, 22: Fastening groove 23: Axis, 24: Lower locking part 25: Upper locking part, 26: Alignment surface 27 : Breaking surface, 30: Brake, 40: Fixing plate 41: Fixed plate body, 42: Support part 43 : Reinforcement part,

Claims

Claim 1 A fixing bar installed on each facing portion of molds spaced apart from each other at a certain distance; a joint installed on each side in the longitudinal direction of a cross beam installed between the molds in a direction traversing the molds, which is coupled to the fixing bar in a snap-fit ​​manner to secure the cross beam; and a brake that restrains the joint so that the cross beam does not fall downward while coupled to the mold, wherein the joint includes a joint body, one side of which is rotatably coupled to the cross beam, and a fastening groove formed on the other side of the joint body in the shape of a groove open to the outside, into which the fixing bar is inserted to rotate the joint body when the cross beam descends along between the molds, wherein the joint body includes a straight braking surface formed in a straight line on the upper part of one side and supported by the brake to maintain the state in which the fixing bar is inserted into the fastening groove, and a curved alignment surface formed at the bottom of the braking surface and supported by the brake to cause the fastening groove to tilt in an incline toward the fixing bar, wherein one side through an eccentric axis to the cross beam A one-touch joint fastening device characterized by being installed such that the fastening groove is aligned at an angle toward the fixing bar due to its own weight. Claim 2 delete Claim 3 A one-touch joint fastening device according to claim 1, characterized in that the joint body has a lower locking portion formed shorter than the upper locking portion among the upper and lower locking portions formed on both the upper and lower sides of the fastening groove, so that the opening of the fastening groove faces the fixing bar. Claim 4 delete Claim 5 A one-touch joint fastening device according to claim 1, characterized by including a fixing plate that is fixed to both ends in the longitudinal direction of the cross beam and overlaps the front or back surface of a stiffener installed in the mold, and is coupled to the stiffener by a fastener. Claim 6 A method for constructing a cross beam of a bridge using a one-touch joint fastening device according to claim 1, comprising: a first step of installing two or more molds at a certain interval; a second step of inserting and installing a cross beam between the molds and temporarily connecting it to the molds in a one-touch manner through the one-touch joint fastening device; and a third step of connecting the molds and the cross beam by fastening them with a fastening member after the second step, wherein the second step comprises: a second-1 step of placing a cross beam equipped with a joint and a brake of the one-touch joint fastening device between molds equipped with a fixing bar of the one-touch joint fastening device, and positioning the fastening groove of the joint body on the fixing bar; a second-2 step of further lowering the cross beam in the second-1 step so that the fixing bar is inserted into the fastening groove of the joint while rotating the joint; and stopping the lowering of the cross beam while the joint is supported by the brake and unable to rotate, thereby temporarily connecting the cross beam to the molds, and aligning the fastening holes formed in the molds and the cross beam, and then using a fastening member A method for constructing a crossbeam of a bridge using a one-touch joint fastening device, characterized by including a second and third step of fastening.

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