Floor slab lifting device and floor slab construction equipment

Abstract

To provide a floor slab lifting device that can improve stability without causing large sized width dimensions.SOLUTION: A floor slab lifting device 10 for installing or removing a floor slab member 3 configuring a floor slab 2 of a bridge 1 comprises a base frame 11 including a U-shaped portion when viewed in the bridge axis direction, two main girders 12 extending parallel to each other in the bridge axis direction and supported by the base frame 11, and a movable frame 13 provided on the two main girders 12 to be movable in the bridge axis direction, and a lifting device 14 suspended from the movable frame 13. The two main girders 12 are not connected to each other within the movement range of the lifting device 14 in the bridge axis direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a deck lifting device for erecting or removing deck members that constitute a bridge deck, and to a deck construction facility equipped with this deck lifting device and a transport vehicle. [Background technology]

[0002] In recent years, precast concrete deck members have been used in the construction of bridge decks. The deck members are arranged in the bridge axis direction on top of the main girders (bridge girders) that extend in the bridge axis direction. Deck members adjacent to each other in the bridge axis direction are connected by, for example, pouring filler concrete into the gaps.

[0003] An erection machine placed on a bridge is sometimes used to erect deck members in a predetermined position. Patent Document 1 discloses a deck erection machine that travels on a pair of left and right rails laid on an already-placed deck. This deck erection machine includes a moving body that can move on the rails and a deck slab lifting mechanism that is supported by the moving body and has a suspension point forward in the direction of movement of the moving body. The moving body includes a pair of left and right lower frames equipped with wheels, a pair of front and rear portal frames whose lower ends are connected to the pair of left and right lower frames, and an upper frame provided above the portal frames. The deck slab lifting mechanism includes a protruding member protruding forward from the front side of the upper frame and a suspension device provided at the tip of the protruding member.

[0004] Between the left and right wheels of the erection machine (inside the portal frame) there is a space that allows the deck transport cart (transport vehicle) that transports (carries in) the deck components to be erected by the deck erection machine to pass through. Inside the pair of left and right rails for the erection machine, another pair of left and right rails are laid, and the transport vehicle moves on this pair of rails. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2019-7137 Summary of the Invention [Problem to be solved by the invention]

[0006] Conventional erection machines require a wide portal frame to form a space through which transport vehicles carrying deck slab members can pass, resulting in an increase in the size of the erection machine.

[0007] One possible configuration is to move the deck members from the rear to the front of the machine without the need for a transport vehicle to pass through. One deck erection machine with this type of configuration has a pair of left and right main girders extending in the bridge axis direction attached to a portal frame, and the lifting device moves along the main girders. In the case of this deck erection machine, because the frame has a portal structure, the mechanism for moving the lifting device along the main girders is installed below the main girders.

[0008] However, in such a configuration, the main girder must be placed at a high position in order to position the lifting device high enough to lift the deck slab member on the transport vehicle. However, placing the main girder at a high position reduces the stability of the erection machine. Furthermore, if there is an adjacent lane in use, drivers traveling on the lane may feel threatened or oppressed by the presence of a tall erection machine nearby.

[0009] In view of the above background, an object of the present invention is to provide a deck slab lifting device and deck slab construction equipment that can improve stability without increasing the width dimension. [Means for solving the problem]

[0010] In order to solve the above problem, one aspect of the present invention is a deck lifting device (10) for erecting or removing deck members (3) that constitute the deck (2) of a bridge (1), comprising a base frame (11) including a U-shaped portion when viewed in the bridge axis direction, two main girders (12) that extend parallel to each other in the bridge axis direction and are supported by the base frame, a movable frame (13) that is mounted on the two main girders so as to be able to move in the bridge axis direction, and a lifting device (14) suspended from the movable frame, wherein the two main girders are not connected to each other within the range of movement of the lifting device in the bridge axis direction.

[0011] According to this aspect, the lifting device can move the main girders over the range of movement, which is the portion of the main girders that is not connected to each other, so there is no need to create a space for the deck transport vehicle to pass through. This allows the width of the base frame to be narrowed, making the deck slab lifting device more compact. Furthermore, because the movable frame that supports the lifting device travels on top of the main girders, the main girders can be positioned at a lower position. This improves the stability of the deck slab lifting device.

[0012] In the above aspect, the base frame may comprise a pair of base members (16) spaced apart in the bridge width direction, two pairs of columns (17) attached to the pair of base members at different positions in the bridge axis direction and supporting the two main girders, and at least one base connecting member (18) connecting the pair of base members or the two pairs of columns.

[0013] According to this aspect, a base frame including a U-shaped portion when viewed in the bridge axis direction can be realized with a simple configuration in which the main girder is reliably supported by two columns. In addition, the weight of the base frame can be reduced.

[0014] In the above aspect, the deck slab lifting device may further include a girder connecting member (23) that connects both ends of the two main girders.

[0015] According to this aspect, the support rigidity of the two main girders can be improved without hindering the movement of the lifting device in the bridge axis direction, thereby improving the stability of the deck slab lifting device.

[0016] In the above aspect, the base frame is configured to be able to travel on the deck and may include a platform (19) for placing the deck member lifted by the lifting device.

[0017] According to this aspect, the deck member can be placed on the support platform and stabilized while the base frame is moved, allowing the deck lifting device to function as a deck transport cart.

[0018] In the above aspect, the base frame is configured to be able to run on rails (6) laid on the deck, and the two main girders are longer than the dimension of the base frame in the bridge axis direction and extend from the base frame in both directions in the bridge axis direction.

[0019] According to this aspect, with a lifting device disposed on the portion of the main girder that protrudes from the base frame, the deck slab member can be raised and lowered or rotated in a lifted state by the lifting device. Therefore, when transporting the deck slab member using a transport vehicle that runs on rails, the deck slab member can be loaded and unloaded onto the transport vehicle even if the transport vehicle is not positioned inside the base frame. This eliminates the need to lay a separate rail for the transport vehicle inside the two rails, making deck construction easier.

[0020] In addition, in order to solve the above problem, another aspect of the present invention is a deck construction facility (100) comprising a deck lifting device (10) in which the base frame is configured to be able to run on the rails (6), and a transport vehicle (30) for transporting the deck members, wherein the transport vehicle is configured to be able to run on the rails.

[0021] According to this aspect, the transport vehicle can run on the rails without laying separate rails for the transport vehicle to run on, which makes it easy to transport the deck members and to carry out deck construction work. [Effects of the Invention]

[0022] According to the above aspects, it is possible to provide a deck slab lifting device and deck slab construction equipment that can improve stability without increasing the width dimension. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a perspective view showing a schematic configuration of a deck slab lifting device according to an embodiment. [Figure 2] A front view of the deck lifting device in the state where deck members are being loaded and unloaded [Figure 3] A cross-sectional side view of the deck lifting device shown along III-III in Figure 2 [Figure 4] Plan view of the deck lifting device shown in Figure 2 [Figure 5] A front view of the deck lifting device in the state where the deck member is being transported [Figure 6] A side cross-sectional view of the deck lifting device shown along line VI-VI in Figure 5. [Figure 7] Plan view of the deck lifting device shown in Figure 5 DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0025] Fig. 1 is a perspective view showing the schematic configuration of a deck slab lifting device 10 according to an embodiment. The deck slab lifting device 10 is used in the construction of a deck 2 of a bridge 1. Fig. 2 is a front view of the deck slab lifting device 10 in a state in which deck members 3 constituting the deck 2 are being loaded and unloaded.

[0026] As shown in Figures 1 and 2, the deck slab lifting device 10 can be used in the installation, removal, and replacement of a deck slab 2 on a bridge 1. In the deck slab installation work and the deck slab installation process in replacement work, the deck slab lifting device 10 is used as an erection machine for placing a precast concrete deck slab member 3 in a predetermined position on the bridge girder 4 (the main girder of the bridge 1). In the deck slab 2 removal work and the deck slab removal process in replacement work, the deck slab lifting device 10 is used as a removal machine for cutting the existing deck slab 2 and removing the deck member 3 separated from the bridge girder 4 from its original position. A wall parapet 5 is provided on both side edges of the deck slab 2. The wall parapet 5 may be provided on one side edge of the deck slab 2. The wall parapet 5 may be removed in advance before cutting the deck slab 2, or may be removed integrally with the deck slab 2.

[0027] When used as an erection machine, the deck lifting device 10 lifts a deck component 3 that is transported by a transport vehicle 30 (see FIG. 3) from one side of the bridge axis direction on the bridge 1, from the loading platform 31 (see FIG. 3) of the transport vehicle 30. The deck lifting device 10 moves the lifted deck component 3 to the other side of the bridge axis direction (forward in the direction in which the erection work is progressing), and then suspends it at a predetermined position on the bridge girder 4. On the other hand, when used as a removal machine, the deck lifting device 10 lifts the deck component 3 that is a part of the deck 2 that has been cut on one side of the bridge axis direction. The deck lifting device 10 rotates the lifted deck component 3 by 90 degrees and moves it to the other side of the bridge axis direction (forward in the direction in which the removal work is progressing), and then suspends it down onto the loading platform 31 of the transport vehicle 30 waiting on the other side of the bridge axis direction.

[0028] Two rails 6 are laid on the deck slab 2, extending parallel to each other along the bridge axis. The deck slab lifting device 10 is configured to move on the rails 6, and moves forward in the direction of travel as construction progresses. The rails 6 are laid on the deck slab 2 by workers so that they extend forward as construction progresses. The rails 6 may be removed sequentially from the rear side as construction progresses.

[0029] The deck slab lifting device 10 can also be used as a transport cart for transporting the deck member 3. When used as a transport cart / erection machine, the deck slab lifting device 10 lifts up the deck member 3 that has been transported onto one side of the bridge 1 in the bridge axis direction, transports and moves it to the other side in the bridge axis direction, and then rotates it 90° on the other side in the bridge axis direction and suspends it down to a predetermined position on the bridge girder 4. The deck member 3 may be transported onto the bridge 1 or may be transported below the bridge 1. For example, the deck slab lifting device 10 may lift up the deck member 3 that has been transported below an access opening formed in the deck slab 2 by a transport vehicle such as a truck or trailer, and transport it onto the bridge 1.

[0030] When used as a transport vehicle that also doubles as a removal machine, the deck lifting device 10 lifts up the deck member 3 that has been separated from the bridge girder 4 on one side of the bridge 1 in the bridge axis direction. The deck lifting device 10 transports and moves the lifted deck member 3 to the other side in the bridge axis direction, and then suspends it onto the loading platform 31 of a transport vehicle 30 for removal that is waiting on the other side in the bridge axis direction. The transport vehicle 30 for removal may be waiting on the bridge 1 or below the bridge 1. For example, the deck lifting device 10 may suspend and lower the deck member 3 onto the loading platform of a transport vehicle such as a truck or trailer that is waiting below a discharge opening formed in the deck 2.

[0031] The following describes the deck slab lifting device 10, taking as an example a case where it is used in a deck slab removal process in the replacement work of the deck slab 2.

[0032] First, the configuration of the deck slab lifting device 10 will be described. Fig. 3 is a side cross-sectional view of the deck slab lifting device 10 taken along III-III in Fig. 2, showing the deck slab lifting device 10 in a state in which the deck slab members 3 are being loaded and unloaded. Fig. 4 is a plan view of the deck slab lifting device 10 shown in Fig. 2 in which the deck slab members 3 are being loaded and unloaded. Figs. 3 and 4 show a deck slab construction facility 100 including rails 6 and a transport vehicle 30. The transport vehicle 30 is configured to travel on the rails 6.

[0033] As shown in Figures 1 to 4, the deck slab lifting device 10 is equipped with a base frame 11 that is U-shaped when viewed in the bridge axis direction (Figure 2). More specifically, the base frame 11 is shaped like a groove (U-shape) that opens upward. The deck slab lifting device 10 also includes two main girders 12 supported by the base frame 11, a movable frame 13 that is provided on the two main girders 12 so as to be able to travel in the bridge axis direction, and a lifting device 14 suspended from the movable frame 13.

[0034] The base frame 11 comprises a pair of base members 16 spaced apart in the bridge width direction, two pairs of columns 17 attached to the pair of base members 16 at different positions in the bridge axis direction, and two base connecting members 18 connecting the pair of base members 16. The columns 17 of each pair are positioned so that they are aligned with each other in the bridge axis direction. The columns 17 are erected on the upper surfaces of the front and rear ends of the corresponding base members 16, and support the middle portions of the two main girders 12 in the longitudinal direction.

[0035] In other words, the two main girders 12 are longer than the dimension of the base frame 11 in the bridge axis direction, and extend from the base frame 11 in both directions of the bridge axis. The lifting device 14 is positioned on the part of the main girder 12 that extends from the base frame 11, and can raise and lower the deck slab member 3, and rotate it while it is lifted. Therefore, when the deck slab member 3 is transported by a transport vehicle 30 traveling on the rails 6, the deck slab member 3 can be loaded and unloaded onto the transport vehicle 30 even if the transport vehicle 30 is not positioned inside the base frame 11. Therefore, there is no need to lay a separate rail dedicated to the transport vehicle 30 inside the two rails 6. This makes it easier to carry out deck construction work.

[0036] In other embodiments, the two main girders 12 may be shorter than or approximately the same as the dimension of the base frame 11 in the bridge axis direction. In this case, the two base connecting members 18 should be positioned closer to the center of the base frame 11 in the bridge axis direction so that the deck slab member 3 can be raised and lowered. Furthermore, on the side where the deck slab member 3 is to be removed or erected, the end positions of the pair of base members 16, or the height of the base members 16 and the position of the traveling device 20 (described later) should be set so that the deck slab member 3 can be rotated 90°.

[0037] The deck construction facility 100 also includes a deck lifting device 10, a pair of rails 6, and a transport vehicle 30, and is configured so that the transport vehicle 30 can run on the rails 6 that are common to the deck lifting device 10. This allows the transport vehicle 30 to run on the rails 6 without having to lay separate rails 6 for the transport vehicle 30 to run on. This makes it easy to transport the deck members 3 and to perform deck construction work.

[0038] The various members constituting the base frame 11, main girder 12, and movable frame 13 may be made of steel beams such as I-beams, H-beams, and channel steel. Appropriate reinforcing materials may be attached to these members and their connections. Note that these members and other members described below are shown in simplified form in Figure 1. Detailed explanations of the shapes and arrangements of the various members, including the reinforcing materials, will be omitted.

[0039] A pair of base members 16 may be connected by a single connecting member that is long in the front-to-rear direction, instead of being connected by two base connecting members 18. Also, instead of connecting a pair of base members 16, the two base connecting members 18 may connect a pair of corresponding left and right columns 17. In this case, since the base connecting members 18 are positioned at a higher position, when viewed in the bridge axis direction (Figure 2), the base frame 11 as a whole is roughly H-shaped, and the upper part of the base frame 11 is U-shaped.

[0040] In this way, the base frame 11 comprises a pair of base members 16, two pairs of columns 17 that support the two main girders 12, and front and rear base connecting members 18 that connect the pair of base members 16. This allows the base frame 11, which includes a U-shaped portion when viewed in the bridge axis direction, to be realized with a simple configuration in which the main girders 12 are securely supported by the two columns 17. This also reduces the weight of the base frame 11. As will be described in more detail later, the base connecting members 18 function as mounting platforms 19 on which the deck slab members 3 are placed.

[0041] Front, rear, left and right traveling devices 20 each equipped with wheels are attached to the lower part of the base frame 11. In this embodiment, a traveling device 20 is attached to the underside of each base member 16. The traveling devices 20 are attached to the front and rear ends of the corresponding base member 16. In another embodiment, pillars 17 may be connected to the front and rear end faces of the corresponding base member 16, and the traveling devices 20 may be attached to the lower ends of the pillars 17. The pair of left and right traveling devices 20 are provided with a drive source 21 (see Figures 3 and 4) that rotates and drives the wheels. The drive source 21 drives the pair of traveling devices 20 in response to operation by an operator, causing the base frame 11 to travel on the rails 6 in the bridge axis direction.

[0042] The two main girders 12 extend parallel to each other in the bridge axis direction. The main girders 12 are formed with an I-shaped cross section or a box cross section. Girder connecting members 23 that connect both main girders 12 are provided at the front and rear ends of the two main girders 12. In other words, girder connecting members 23 are not provided anywhere other than the front and rear ends of the two main girders 12. The parts where the girder connecting members 23 are not provided can be within the range of movement of the lifting device 14 in the bridge axis direction. In other words, the two main girders 12 are not connected to each other within the range of movement of the lifting device 14 in the bridge axis direction.

[0043] This allows the lifting device 14 to move the main girders 12 over the range of movement of the parts of the main girders 12 that are not connected to each other. Therefore, there is no need for the base frame 11 to form a space inside it for the deck transport cart to pass through. This allows the width of the base frame 11 to be narrowed, making it possible to make the deck slab lifting device 10 more compact. Furthermore, this allows the movable frame 13 that supports the lifting device 14 to be positioned so that it travels above the main girders 12, making it possible to position the main girders 12 at a lower position. This improves the stability of the deck slab lifting device 10.

[0044] By providing the deck slab lifting device 10 with the girder connecting member 23 that connects both ends of the two main girders 12, the movement of the lifting device 14 in the bridge axis direction is not hindered and the support rigidity of the two main girders 12 is improved. This also improves the stability of the deck slab lifting device 10.

[0045] Guide rails 24 are laid on the top surface of each main girder 12 over approximately its entire length. The movable frame 13 has a rectangular or cross-shaped configuration in plan view, and is equipped with a pair of vertical members 25 extending in the bridge axis direction and a pair of horizontal members 26 extending perpendicular to the bridge axis (hereinafter referred to as the bridge width direction). The movable frame 13 is equipped with wheels at its four corners that fit the guide rails 24, and is configured to run on the guide rails 24. The movable frame 13 is equipped with a travel drive source (not shown) that rotates and drives the wheels. The movable frame 13 runs on the main girders 12 in the bridge axis direction in response to operation by a worker.

[0046] The lifting device 14 is supported by a pair of cross members 26 of the movable frame 13. In this embodiment, the lifting device 14 is provided so as to be movable in the bridge width direction on cross guide rails 27 laid on the pair of cross members 26. When lifting the deck slab member 3, the lifting device 14 lifts the deck slab member 3 via a lifting jig 28 attached to the deck slab member 3. Specifically, the lifting device 14 lifts the deck slab member 3 that has been separated from the bridge girder 4 on one side in the bridge axis direction, rotates it 90°, moves it to the other side in the bridge axis direction, and hoists it down onto the loading platform 31 of a transport vehicle 30 waiting below the main girder 12 on the other side in the bridge axis direction.

[0047] Fig. 5 is a front view of the deck slab lifting device 10 in a state in which the deck slab member 3 is being transported. Fig. 6 is a side cross-sectional view of the deck slab lifting device 10 shown along line VI-VI in Fig. 5. Fig. 7 is a plan view of the deck slab lifting device 10 shown in Fig. 5.

[0048] As shown in Figures 5 to 7, the deck slab lifting device 10 is also used as a transport vehicle that transports the lifted deck member 3 in the bridge axis direction. In this case, the deck slab lifting device 10 moves on the rails 6 with the lifting device 14 suspending the deck member 3 at the midpoint between the two base connecting members 18 and placing it on the two base connecting members 18. In other words, the two base connecting members 18 function as a platform 19 on which the deck member 3 lifted by the lifting device 14 is placed.

[0049] In this way, the base frame 11 is provided with the mounting platform 19. This allows the base frame 11 to travel with the deck member 3 placed and stabilized on the mounting platform 19, allowing the deck lifting device 10 to function as a deck transport cart.

[0050] In other embodiments, a plate may be provided on two base connecting members 18 or other connecting material that connects a pair of base members 16 to form a mounting table.

[0051] Although the description of the specific embodiment has been completed above, the present invention is not limited to the above embodiment and its modifications, and can be widely modified and implemented. For example, in the above embodiment, the deck slab 2 is supported by two bridge girders 4, and the deck member 3 is cut only in the bridge width direction, so that the size of the entire cross section of the deck slab 2. In other embodiments, the deck slab 2 may be supported by three or more bridge girders 4. Furthermore, the deck slab 2 may also be cut in the bridge axis direction, so that the deck member 3 is the size of a portion of the cross section of the deck slab 2. In addition, the specific configuration, arrangement, quantity, materials, and specific procedures and order of each work of the various members and parts may be changed as appropriate without departing from the spirit of the present invention. Furthermore, not all of the components shown in the above embodiment are necessarily required, and can be selected as appropriate. [Explanation of symbols]

[0052] 1: Bridge 2: Floor slab 3: Deck members 6: Rail 10: Floor slab lifting device 11: Base frame 12: Main digit 13: Movable frame 14: Lifting device 16: Base material 17: Pillar 18: Base connecting member 19: Mounting table 20: Running gear 21: Drive source 23: Girder connecting member 30: Transport vehicle 31: Cargo bed 100: Deck construction equipment

Claims

1. A deck lifting device for erecting or removing deck members that constitute the deck of a bridge, A base frame including a U-shaped portion when viewed in the bridge axis direction; Two main girders extending parallel to each other in the bridge axis direction and supported by the base frame; A movable frame provided on the two main girders so as to be able to travel in the bridge axis direction; a lifting device suspended from the movable frame, A deck lifting device in which the two main girders are not connected to each other within the range of movement of the lifting device in the bridge axis direction.

2. The base frame is A pair of base members arranged at an interval in the bridge width direction; Two pairs of columns are erected on the pair of base members at different positions in the bridge axis direction and support the two main girders; The deck lifting device according to claim 1 , further comprising: at least one base connecting member connecting a pair of the base members or two pairs of the columns.

3. The deck slab lifting device according to claim 1 or 2, further comprising a girder connecting member that connects both ends of the two main girders.

4. A deck lifting device as described in claim 1 or 2, wherein the base frame is configured to be able to run on the deck and is provided with a platform for placing the deck member lifted by the lifting device.

5. The base frame is configured to be able to run on rails laid on the deck, The deck slab lifting device according to claim 1 or 2, wherein the two main girders are longer than the bridge axis direction dimension of the base frame and extend from the base frame in both directions of the bridge axis.

6. The deck slab lifting device according to claim 5; A deck construction facility equipped with a transport cart for transporting the deck member, The deck construction facility is configured so that the transport cart can run on the rails.

Images