JP7652655B2 - Heavy load mounting device and adjustment plate - Google Patents

Description

The present invention relates to a heavy load mounting device and an adjustment plate.

Currently, a heavy load mounting device for transporting a bridge girder to a bridge pier is known. Such a heavy load mounting device is disclosed to include a slide device that can move along a second direction while supporting a bridge girder that is moved in a first direction, an inclination sensor that detects the inclination of the slide device, a traction device that traction the slide device in the direction opposite to the second direction, and a configuration in which, when it is determined that the slide device is tilted based on the detection value from the inclination sensor, the traction device generates a pulling force on the slide device in the direction opposite to the second direction (Patent Document 1). It is said that by employing such a heavy load mounting device, a heavy load such as a bridge girder can be supported safely in an extremely stable state when the heavy load is rotated or moved laterally.

JP 2013-87441 A

However, the conventional heavy load loading device disclosed in Patent Document 1 is a device for linearly transporting a straight heavy load whose main surface has a straight shape in plan view, such as a straight bridge girder, and is not a device for linearly transporting a curved heavy load whose main surface has a curved shape in plan view. For this reason, when transporting a curved heavy load in a linear manner using the conventional heavy load loading device disclosed in Patent Document 1, it is necessary to stop the transport by the heavy load loading device once and manually adjust the transport direction of the curved heavy load by a person every time the curvature direction of the curved heavy load changes. As a result, the device is frequently stopped and the work time required for manual adjustment occurs, and the efficiency of transporting heavy loads decreases. On the other hand, if such adjustments are not made, the heavy load loading device will not be able to transport the curved heavy load in a linear manner, and the transport accuracy of the heavy load loading device will decrease.

The present invention was made in consideration of these circumstances, and aims to provide a heavy load mounting device and adjustment plate that can improve the transport accuracy and transport efficiency of curved heavy loads using a simple configuration.

To achieve the above-mentioned object, the weight loading device of the present invention is capable of linearly transporting a curved weight object having a flat main surface and a curved shape in a planar view of the main surface in a predetermined direction, and is equipped with a first transport section on which the curved weight object is mounted and which transports the curved weight object in a first direction along the curvature direction of the planar view shape of the main surface, and a second transport section on which the first transport section is mounted and which transports the curved weight object in the first direction while simultaneously transporting the first transport section in a second direction so that the curved weight object is transported linearly in the predetermined direction.

By adopting such a configuration, the conveying direction of the curved weight object can be adjusted using a simple configuration, and therefore, the curved weight object can be conveyed linearly along a predetermined direction even for curved weight objects. As a result, the conveying accuracy of the curved weight object can be improved, and compared to manually adjusting the conveying direction of the curved weight object, the labor and cost required for manual adjustment can be reduced, and a decrease in conveying work efficiency due to the stop of conveying the curved weight object during adjustment and the time required for adjustment can be suppressed. In this way, the conveying accuracy and conveying efficiency of the curved weight object can be improved.

In the heavy load mounting device of the present invention, the first conveying section may have a first conveying surface that moves in a third direction, which is a linear direction, and on which the curved heavy load is mounted, and a first adjustment section that adjusts the position of the curved heavy load on the first conveying surface while the curved heavy load is conveyed in the third direction by the first conveying surface so that the curved heavy load is conveyed along the first direction.

By adopting this configuration, the linear movement of the conveying surface can be easily converted into the curved movement of the curved heavy load.

In the weight loading device according to the present invention, when the main surface of the curved weight being transported is viewed in a plan view, the first adjustment unit may perform a first position adjustment that rotates the curved weight relative to the first transport surface along the curvature direction.

By adopting this configuration, it is possible to adjust the position of the curved heavy object relative to the first conveying surface, thereby improving the conveying stability of the curved heavy object.

In the heavy load mounting device according to the present invention, the first transport section further has an adjustment plate, and the curved heavy load is mounted on the first transport surface via the adjustment plate, and the adjustment plate has a first plate fixed to the main surface of the curved heavy load and a second plate attached to the first plate, and the first plate is placed on the second plate so as to be rotatable relative to the second plate, and the first adjustment section may perform the first position adjustment by rotating the first plate relative to the second plate.

By adopting this configuration, it is possible to adjust the position of the curved heavy object relative to the first conveying surface using a simple structure.

In the heavy load mounting device according to the present invention, the first adjustment unit may have a guide jack that is extendable in a direction intersecting the third direction, and the first adjustment unit may perform the first position adjustment by extending or retracting the guide jack to rotate the first plate relative to the second plate so that the guide jack presses against the curved heavy load.

By adopting this configuration, the manufacturing costs of the device can be reduced by simplifying the configuration for adjusting the position of the curved weight.

In the heavy load mounting device of the present invention, the second transport unit has a second adjustment unit including a rotation axis and a rotation plate on which the first transport unit is mounted, and the second adjustment unit may perform a second position adjustment to rotate the first transport unit around the rotation axis as the center of rotation so that the curved heavy load moves linearly.

By adopting this configuration, the position of the first conveying section can be adjusted using a simple configuration.

In the heavy load mounting device according to the present invention, the second transport unit further has a third adjustment unit on which the second adjustment unit is mounted, and the third adjustment unit performs a third position adjustment in which the second adjustment unit moves along a fourth direction, which is a linear direction, while performing a second position adjustment so that the heavy load moves linearly along a predetermined direction, and the second transport unit may move along the second direction by the second position adjustment and the third position adjustment.

By adopting this configuration, it is possible to transport heavy objects linearly along a specified direction, improving the transport accuracy of the heavy objects.

In the heavy load mounting device of the present invention, the second adjustment unit may have a rotating jack that is attached to the rotating plate and can rotate the rotating plate by expanding and contracting, and the third adjustment unit may have a moving jack that can move the second adjustment unit back and forth along the fourth direction by expanding and contracting.

By adopting this configuration, it is possible to adjust the position of the first conveying unit using a simple configuration.

In the heavy load mounting device of the present invention, the curved heavy load is a bridge girder, the main surface is the main surface of the flange of the bridge girder, and the planar shape of the main surface may be a clothoid curve.

By adopting this configuration, it is possible to transport a clothoid curved bridge girder linearly along a specified direction, improving the transport accuracy and efficiency of the bridge girder.

The adjustment plate of the present invention is used in a conveying device that conveys a heavy object having a flat main surface linearly along a predetermined direction, and is used to adjust the mounting position of the heavy object in the conveying device. The heavy object is mounted on the conveying device via the adjustment plate, and the adjustment plate has a first plate fixed to the main surface of the heavy object and a second plate attached to the first plate, and the first plate is placed on the second plate so as to be rotatable relative to the second plate.

By adopting this configuration, it is possible to adjust the mounting position of a heavy object on a transport device using a simple configuration.

In the adjustment plate according to the present invention, the first plate has a first side surface that is a flat surface, and the second plate has a second side surface that is a convex arc-shaped surface or a concave arc-shaped surface that corresponds to the first side surface, and when an external force causes the first side surface to come into contact with and slide against the second side surface, the first plate may rotate relative to the second plate.

By adopting this configuration, it is possible to simplify the adjustment configuration for the mounting position in a heavy object transport device.

The present invention makes it possible to provide a heavy load mounting device and adjustment plate that can improve the transport accuracy and transport efficiency of curved heavy loads using a simple configuration.

FIG. 2 is a perspective view showing a state in which the heavy object mounting device according to the present embodiment is used. FIG. 1 is a perspective view showing a configuration of a heavy object mounting device according to an embodiment of the present invention. 2 is a diagram showing a configuration of a heavy object delivery section of the heavy object mounting device according to the present embodiment. FIG. 4A and 4B are diagrams showing a configuration of an adjustment plate of the heavy object mounting device according to the present embodiment. 4A and 4B are diagrams showing the mounting relationship between a first plate and a second plate constituting an adjustment plate of the heavy object mounting device according to the present embodiment. FIG. 4A and 4B are diagrams showing a configuration of a first plate of the heavy object mounting device according to the present embodiment. 5A and 5B are diagrams showing a configuration of a second plate of the heavy object mounting device according to the present embodiment. FIG. 2 is a diagram showing a state in which a curved bridge girder is being transported by the heavy load mounting device according to the present embodiment. FIG. 2 is a diagram showing a state in which a curved bridge girder is being transported by the heavy load mounting device according to the present embodiment. FIG. 2 is a diagram showing a state in which a curved bridge girder is being transported by the heavy load mounting device according to the present embodiment. 11 is a diagram for explaining a first position adjustment by a first adjustment unit of the heavy object mounting device according to the present embodiment. FIG. 11 is a diagram for explaining a first position adjustment by a first adjustment unit of the heavy object mounting device according to the present embodiment. FIG. 13A to 13C are diagrams for explaining a second position adjustment by a second adjustment unit of the heavy object mounting device according to the present embodiment. 13A to 13C are diagrams for explaining a second position adjustment by a second adjustment unit of the heavy object mounting device according to the present embodiment.

The present embodiment will be described below with reference to the various figures. Note that the positional relationships of the top, bottom, left, right, etc. of the drawings are based on the positional relationships shown in the drawings unless otherwise specified. Furthermore, the dimensional ratios of the drawings are not limited to the ratios shown. Furthermore, the following embodiment is an example for explaining the present invention, and is not intended to limit the present invention to only this embodiment. Furthermore, various modifications of the present invention are possible without departing from the gist of the present invention.

<Outline of Heavy Load Mounting Device 1>
First, an overview of transportation by the heavy load mounting device 1 according to this embodiment will be described with reference to Fig. 1 and Fig. 5A to Fig. 5C. Fig. 1 is a perspective view showing the heavy load mounting device 1 in use. Fig. 5A to Fig. 5C are views showing the state of transporting a curved bridge girder 5 by the heavy load mounting device 1. Here, in Fig. 2, the curved bridge girder 5 is shown as transparent in order to show the configuration of the heavy load mounting device 1. Also, in Fig. 1, the assembly yard and platform that support the heavy load mounting device 1 are omitted.

The heavy load mounting device 1 according to this embodiment is an example of a heavy load mounting device capable of transporting curved heavy loads linearly along a predetermined direction. Here, a curved heavy load is a heavy load that has a flat main surface and the shape of the main surface in a plan view is curved. Note that the object to be transported by the heavy load mounting device 1 is not limited to curved heavy loads, but may be a linear heavy load. In the following explanation, the object to be transported by the heavy load mounting device 1 is described as a curved bridge girder 5, which is an example of a curved heavy load.

The curved bridge girder 5 is a clothoid curved bridge girder, as shown in FIG. 5A. The curved bridge girder 5 has a pair of flanges 51 and a web 52 provided between the pair of flanges 51, as shown in FIG. 1. The flange 51 is a flat plate-like member, and has a main surface 511 and a main surface 512 on both sides in the thickness direction. Both the main surface 511 and the main surface 512 are flat main surfaces, and have a clothoid curved shape in plan view. The web 52 is a flat plate-like member, and has a main surface 521 and a main surface 522 on both sides in the thickness direction. The web 52 is provided on the flange 51 so that its width direction intersects with the width direction of the flange 51.

During transportation, the curved bridge girder 5 is transported by a pair of heavy load mounting devices 1 provided on both sides of the width of the curved bridge girder 5. Specifically, the pair of heavy load mounting devices 1 operate under the control of a control unit (not shown) and transport the curved bridge girder 5 linearly along a specified direction D, which is a linear direction from the first pier A1 to the second pier A2, so as to span the curved bridge girder 5 across the first pier A1 and second pier A2 shown in Figures 5A to 5C.

In this case, the curved bridge girder 5 is mounted on a pair of heavy-weight mounting devices 1 via the main surface 511. The pair of heavy-weight mounting devices 1 are movably attached to the first pier A1 by an attachment configuration not shown. In addition, two or more sets of a pair of heavy-weight mounting devices 1 may be used depending on the direction in which the curved bridge girder 5 curves and extends, that is, the dimensions in the curved direction of the planar shape of the main surface 511. In this case, the first set may be attached to the first pier A1, and the other set may be attached to the platform B. Details of the transportation of the curved bridge girder 5 by the heavy-weight mounting device 1 will be explained after the configuration of the heavy-weight mounting device 1 is explained. In the following explanation, the curved direction of the planar shape of the main surface 511 of the curved bridge girder 5 may be called the "curved direction".

<Configuration of heavy object mounting device 1>
Next, the configuration of the heavy load mounting device 1 according to this embodiment will be described in detail with reference to Figures 1 to 5A. Figure 2 is a perspective view showing the configuration of the heavy load mounting device. Figure 3 is a view showing the configuration of the heavy load sending section 11 of the heavy load mounting device. Figures 4A to 4D are views showing the configuration of the adjustment plate 150.

As shown in Figs. 2 and 5A, the heavy load mounting device 1 includes a first conveying unit 10 on which a curved bridge girder 5 is mounted and which conveys the curved bridge girder 5 in a first direction D1 along the curvature direction, and a second conveying unit 20 on which the first conveying unit 10 is mounted and which conveys the first conveying unit 10 along a second direction D2 so that the curved bridge girder 5 is conveyed linearly along a predetermined direction D. The conveying of the curved bridge girder 5 by the first conveying unit 10 and the conveying of the first conveying unit 10 by the second conveying unit 20 are performed simultaneously.

[First conveying section 10]
As shown in FIG. 2, the first transport unit 10 has a heavy load sending unit 11, a first adjustment unit 13, and an adjustment plate unit 15. The curved bridge girder 5 is mounted on the heavy load sending unit 11 via the adjustment plate unit 15. The heavy load sending unit 11 transports the curved bridge girder 5 by linear movement of a first transport surface 125 described later. The first adjustment unit 13 performs a first position adjustment to rotate the curved bridge girder 5 relative to the first transport surface along the curved direction via the adjustment plate unit 15. In addition, the transport by the heavy load sending unit 11 and the adjustment by the first adjustment unit 13 and the adjustment plate unit 15 are performed simultaneously. In the following, the state in which the curved bridge girder 5 is mounted on the heavy load sending unit 11 via the adjustment plate unit 15 may be referred to as a "mounted state".

(Heavy object delivery section 11)
The heavy load delivery unit 11 is, for example, a synchronous jack. As shown in FIG. 3 , the heavy load delivery unit 11 has a delivery main body 110, an endless track 120 that is rotated by the drive of the delivery main body 110, and a base 130 for attaching the entire heavy load delivery unit 11 to the second transport unit 20.

As shown in FIG. 3, the sending main body 110 has a pair of drive rollers 111 provided on both sides of the sending main body 110, and a lifting unit 112 provided between the pair of drive rollers 111. The pair of drive rollers 111 are configured to drive the rotation of the endless track belt 120 by rotating. The lifting unit 112 is configured to support the curved bridge girder 5 and the adjustment plate unit 15 via the endless track belt 120.

As shown in FIG. 3, the lifting section 112 has a number of vertical jacks 113 and a Teflon (registered trademark) lifting jack 114 that contacts the inner circumferential surface 122 of the endless track belt 120 described later. By supplying hydraulic pressure to the vertical jacks 113, the vertical jacks 113 can evenly support the corresponding portion of the endless track belt 120 (specifically, the transport section 124 described later) and the curved bridge girder 5 from below via the Teflon lifting jacks 114.

As shown in FIG. 3, the endless track belt 120 is, for example, an endless crawler connected by a plurality of track plates 129. The endless track belt 120 has an outer peripheral surface 121 and an inner peripheral surface 122. When the sending main body unit 110 is viewed from the front, the endless track belt 120 is wound around the outer peripheral side of the sending main body unit 110 so that the inner peripheral surface 122 abuts against the pair of driving rollers 111 and is supported by the Teflon lift jack 114 of the lifting unit 112.

In addition, a part of the endless track belt 120 located between the pair of drive rollers 111 and in contact with the Teflon push-up jack 114 of the lifting unit 112 constitutes a conveying unit 124 on which the curved bridge girder 5 is mounted via the adjustment plate unit 15. A part of the outer circumferential surface 121 corresponding to the conveying unit 124 constitutes a first conveying surface 125. When the endless track belt 120 rotates in the manner shown in FIG. 3, the first conveying surface 125 moves in a third direction D3, which is a linear direction. Thus, in the mounted state, the heavy load sending unit 11 can convey the curved bridge girder 5 by linear movement in the third direction of the first conveying surface 125. Note that the third direction D3 is a constant direction in the heavy load sending unit 11, and when the first conveying unit 10 is rotated by the second conveying unit 20, the third direction D3 also changes direction with the rotation of the heavy load sending unit 11.

(First adjustment unit 13)
2, the first adjustment unit 13 has a frame portion 135 fixed to the periphery of the sending body portion 110, and a first guide jack 131 and a second guide jack 132 provided on the upper surface of the frame portion 135. The first guide jack 131 and the second guide jack 132 are provided above the first conveying surface 125 so as to be in contact with the main surface 521 of the web 52 of the curved bridge girder 5.

The first guide jack 131 and the second guide jack 132 are configured to extend and retract in a direction D5 intersecting with the third direction D3, thereby adjusting the mounting position of the curved bridge girder 5 mounted on the first conveying surface 125 via the adjustment plate portion 15. Specifically, when the first guide jack 131 extends more than the second guide jack 132 in a plan view of the first conveying surface 125, the curved bridge girder 5 rotates clockwise via the adjustment plate portion 15, and when the second guide jack 132 extends more than the first guide jack 131, the curved bridge girder 5 rotates counterclockwise via the adjustment plate portion 15. When the first guide jack 131 and the second guide jack 132 extend the same amount, the curved bridge girder 5 moves parallel along the direction D4 (described later) shown in FIG. 2.

In this way, the first adjustment unit 13 can perform a first position adjustment to the position of the curved bridge girder 5 on the first conveying surface 125 at the same time that the curved bridge girder 5 is conveyed in the third direction D3 by the first conveying surface 125 so that the curved bridge girder 5 is conveyed along the first direction D1. Therefore, the curved bridge girder 5 can be rotated relative to the first conveying surface 125 along the curvature direction at the same time that the curved bridge girder 5 is conveyed in the third direction D3. As a result, the curved bridge girder 5 is conveyed in the first direction D1. In other words, the movement of the curved bridge girder 5 in the first direction D1 is a combined movement of the movement of the curved bridge girder 5 in the third direction D3 and the rotation of the curved bridge girder 5 relative to the first conveying surface 125.

(Adjustment plate portion 15)
As shown in Fig. 2, the adjustment plate section 15 is configured by arranging a plurality of adjustment plates 150 along the extension direction of the curved bridge girder 5. As shown in Fig. 4A, each adjustment plate 150 has a main surface 150a and a main surface 150b on both sides in the thickness direction. In the mounted state, the main surface 150a is a surface that contacts the main surface 511 of the curved bridge girder 5, and the main surface 150b is a surface that contacts the first conveying surface 125 of the heavy load sending section 11.

The adjustment plate portion 15 has a first plate 151 and a second plate 152 that are placed so as to overlap each other, as shown in Figs. 4A to 4D. Hereinafter, the state in which the first plate 151 is placed on the second plate 152 may be referred to as the "placed state."

The first plate 151 is a plate-like member made of metal (e.g., SCM440). As shown in Figures 4A and 4B, the first plate 151 has a base plate 153 and two guide bars 155 provided on the base plate 153.

As shown in Figures 4A and 4C, multiple neodymium magnets 161 are embedded in the base plate 153. Therefore, when mounted, the curved bridge girder 5 is attracted to the base plate 153 by the magnetic force of the neodymium magnets 161, and can be fixed to the adjustment plate portion 15.

The guide bar 155 is attached to both longitudinal ends of the main surface 153b of the base plate 153 by a number of bolts 163. In this case, the first side surfaces 157 of each base plate 153 are arranged to face each other as shown in Figures 4A and 4B. In this way, the two first side surfaces 157 and the main surface 153b form a sliding space in which the sliding portion 154 of the second plate 152 described below rotates and slides.

The second plate 152 is a plate-like member made of resin (e.g., MC901). As shown in Figs. 4A and 4D, the second plate 152 has a slide portion 154, which is a convex portion in the center, and side portions 156 on both sides of the slide portion 154 in the longitudinal direction.

The slide portion 154 is a portion that is inserted into the slide space of the first plate 151 in the placed state. Therefore, the maximum longitudinal dimension L2 (see FIG. 4D) of the slide portion 154 is slightly smaller than the distance L1 (see FIG. 4B) between the two first side surfaces 157 of the first plate 151. Specifically, as shown in FIG. 4B and FIG. 4D, the slide portion 154 has two convex arc-shaped second side surfaces 158 on both sides in the longitudinal direction. As shown in FIG. 4B and FIG. 4D, the planar shape of the second side surface 158 is an arc shape with a radius R1. In addition, a minimum gap G1 is formed between each second side surface 158 and the first side surface 157 corresponding to that second side surface 158. Here, for example, when R1 is 250 mm, G1 is about 1.5 mm. Thus, in the placed state, the sliding portion 154 can slide and rotate while being supported and restricted by the two first side surfaces 157.

In addition, as shown in Figs. 4A and 4C, multiple neodymium magnets 162 are embedded in the slide portion 154. Therefore, in the placed state, the first plate 151 made of metal is attracted to the slide portion 154 by the magnetic force of the neodymium magnets 162, thereby realizing the attachment of the first plate 151 and the second plate 152.

In this way, when the first plate 151 and the second plate 152 are not subjected to an external force in the loaded state, the two are fixed by the magnetic force without moving relative to each other. Therefore, the loading position of the curved bridge girder 5 loaded on the first transport surface 125 via the adjustment plate section 15 can be maintained in a constant state on the first transport surface 125, and the stability of the transport of the curved bridge girder 5 can be ensured. On the other hand, when the first plate 151 and the second plate 152 are subjected to an external force, the first side surface 157 of the first plate 151 comes into contact with the second side surface 158 of the second plate 152 and slides due to the external force, and the first plate rotates relative to the second plate. Therefore, the loading position of the curved bridge girder 5 on the first transport surface 125 can be easily adjusted without stopping the transport by the heavy load sending section 11.

The side portion 156 is thinner than the slide portion 154. In the placed state, the side portion 156 supports the two guide bars 155 of the first plate 151. Therefore, the load of the curved bridge girder 5 received by the first plate 151 can be distributed not only to the slide portion 154 but also to the side portion 156.

In this way, the first conveying unit 10 can linearly convey the curved bridge girder 5 along the third direction D3 by the heavy load sending unit 11, while continuing to rotate the mounting position of the curved bridge girder 5 on the first conveying surface 125 along the curved direction by the first adjustment unit 13 and the adjustment plate unit 15. As a result, the first conveying unit 10 can convey the curved bridge girder 5 along the first direction D1, as shown in FIG. 5A. In other words, the movement of the curved bridge girder 5 in the first direction D1 is a combined movement of the movement of the curved bridge girder 5 in the third direction D3 and the rotation of the curved bridge girder 5 relative to the first conveying surface 125.

[Second conveying section 20]
As shown in Figure 2, the second conveying unit 20 has a second adjustment unit 21 on which the first conveying unit 10 is mounted and which rotates the first conveying unit 10, and a third adjustment unit 23 on which the second adjustment unit 21 is mounted and which moves the second adjustment unit 21 in a linear direction.

(Second Adjustment Unit 21)
The second adjustment unit 21 is configured to perform a second position adjustment for rotating the first transport unit 10 so that the curved bridge girder 5 moves linearly. The second adjustment unit 21 has a base unit 210, a rotating shaft (not shown) fixed to the base unit 210, a rotating plate 220 rotatably attached to the rotating shaft, and a rotating jack 230 capable of rotating the rotating plate 220.

The base unit 210 is disposed on the third adjustment unit 23. The base unit 210 can support the entire second adjustment unit 21 and can be moved in a linear direction by the third adjustment unit 23.

One end of the rotating jack 230 is fixed to the base 210, and the other end, which can be extended or retracted, is attached to the rotating plate 220. Thus, when the rotating plate 220 is viewed from above, by supplying hydraulic pressure to the rotating jack 230, the rotating jack 230 can extend or retract to rotate the rotating plate 220 in a clockwise or counterclockwise direction.

(Third Adjustment Unit 23)
The third adjustment unit is configured to perform a third position adjustment in which the second adjustment unit 21 moves along the fourth direction D4, which is a linear direction, while the second adjustment unit 21 performs the second position adjustment so that the curved bridge girder 5 moves linearly along the predetermined direction D. The third adjustment unit 23 is, for example, a jascoro. The third adjustment unit 23 is provided along the longitudinal direction of the first pier A1 (see FIG. 1). The third adjustment unit 23 also has a moving jack (not shown) that can reciprocate the second adjustment unit 21 along the fourth direction D4 by expanding and contracting. In this way, the second adjustment unit 21 arranged in the third adjustment unit 23 can move linearly to the first side or the second side along the fourth direction D4.

In this way, the second conveying unit 20 can convey the curved bridge girder 5 along the first direction D1 by the first conveying unit 10, while simultaneously rotating the first conveying unit 10 by the second adjustment unit 21 and moving the first conveying unit 10 in the fourth direction by the third adjustment unit 23. As a result, the second conveying unit 20 can convey the first conveying unit 10 along the second direction D2 (see FIG. 5A). In other words, the movement of the first conveying unit 10 in the second direction D2 is a combined movement of the movement of the first conveying unit 10 in the fourth direction D4 and the rotation of the first conveying unit 10.

<Transportation by Heavy Load Mounting Device 1>
Next, the transportation of the curved bridge girder 5 by the heavy load mounting device 1 will be described with reference to Fig. 5A to Fig. 7B. Fig. 5A to Fig. 5C are diagrams showing the state of transportation of the curved bridge girder 5 by the heavy load mounting device 1. Fig. 6A and Fig. 6B are diagrams for explaining the first position adjustment by the first adjustment unit 13 and the second adjustment unit 21. Fig. 7A and Fig. 7B are diagrams for explaining the first position adjustment by the second adjustment unit 21.

First, as shown in FIG. 5A, the first part 501 of the curved bridge girder 5 is mounted on the heavy load mounting device 1, and the other parts of the curved bridge girder 5 are placed on the platform B to prepare for transportation by the heavy load mounting device 1. In this case, the heavy load mounting device 1 is located on the second side of the first pier A1 in the fourth direction (see FIG. 2).

After the preparation is completed, the heavy object mounting device 1, i.e., transportation by the first transport unit 10 and transportation by the second transport unit 20, starts simultaneously based on the control of the control unit. In this case, transportation by the heavy object delivery unit 11 of the first transport unit 10, a first position adjustment by the first adjustment unit 13 and adjustment plate unit 15 of the first transport unit 10, a second position adjustment by the second adjustment unit 21 of the second transport unit 20, and a third position adjustment by the third adjustment unit 23 of the second transport unit 20 are each performed simultaneously.

Specifically, in the process of moving from the state shown in FIG. 5A to the state shown in FIG. 5B, that is, when the first part 501 passes through the heavy load mounting device 1 and then the second part 502, which is located furthest on the first side in the fourth direction, reaches the heavy load mounting device 1, the heavy load sending part 11 transports the curved bridge girder 5 in the first direction D1 under the adjustment of the first adjustment part 13 and the adjustment plate part 15 according to the shape of the curved bridge girder 5 from the first part 501 to the second part 502, while the second adjustment part 21 rotates the first transport part 10 in the counterclockwise direction, and the third adjustment part 23 moves the first transport part 10 to the first side in the fourth direction D4. In this way, the curved bridge girder 5 can be transported along the specified direction D.

In the process of moving from the state shown in FIG. 5B to the state shown in FIG. 5C, that is, when the second part 502 located closest to the first side in the fourth direction passes through the heavy load mounting device 1 and then the third part 503 reaches the heavy load mounting device 1, the heavy load sending part 11 transports the curved bridge girder 5 in the first direction D1 under the adjustment of the first adjustment part 13 and the adjustment plate part 15 according to the shape of the curved bridge girder 5 from the second part 502 to the third part 503, while the second adjustment part 21 continues to rotate the first transport part 10 in the counterclockwise direction, and the third adjustment part 23 moves the first transport part 10 to the second side in the fourth direction D4. In this way, the curved bridge girder 5 can be transported along the specified direction D.

In this way, as shown in Figures 5A to 5C, the curved bridge girder 5 is transported linearly along the specified direction D and is spanned across the first pier A1 and the second pier A2.

On the other hand, in the transport process from FIG. 5A to FIG. 5C, if only the transport by the heavy load delivery unit 11 is performed and the first position adjustment by the first adjustment unit 13 is not performed or is not performed simultaneously, or due to external factors such as vibration, the curved bridge girder 5 may be misaligned on the first transport surface 125 as shown in FIG. 6A. If such a misalignment of the curved bridge girder 5 occurs, the second guide jack 132 moves away from the main surface 521 of the web 52 of the curved bridge girder 5 and cannot support the curved bridge girder 5. Therefore, the curved bridge girder 5 does not rotate relative to the first transport surface 125, and the first transport unit 10 cannot transport the curved bridge girder 5 along the first direction D1. As a result, the heavy load mounting device 1 cannot transport the curved bridge girder 5 linearly along the specified direction D.

To address this problem of misalignment of the curved bridge girder 5, the second adjustment unit 21 rotates the first conveying unit 10 counterclockwise while the first guide jack 131 and the second guide jack 132 of the first adjustment unit 13 extend, thereby repairing the problem of misalignment of the curved bridge girder 5 as shown in Figure 6B.

In addition, because only transport is performed by the first transport unit 10 and transport is not performed by the second transport unit 20 or transport is not performed simultaneously, as shown in Figures 5A and 7A, the curved bridge girder 5 may be transported only in the first direction D1. When such a deviation in the transport direction of the curved bridge girder 5 occurs, the curved bridge girder 5 is no longer transported linearly along the specified direction D.

To address this problem of misalignment in the conveying direction of the curved bridge girder 5, the second adjustment unit 21 of the second conveying unit 20 rotates the first conveying unit 10 counterclockwise, thereby repairing the problem of misalignment in the conveying direction of the curved bridge girder 5, as shown in Figure 7B.

The weight loading device 1 according to the embodiment described above is capable of linearly transporting a curved bridge girder 5 having a flat main surface 511 and a curved shape in plan view of the main surface 511 along a predetermined direction D, and includes a first transport unit 10 on which the curved bridge girder 5 is mounted and transports the curved bridge girder 5 in a first direction D1 along the curvature direction of the plan view shape of the main surface 511, and a second transport unit 20 on which the first transport unit 10 is mounted and transports the curved bridge girder 5 along the first direction D1 while transporting the first transport unit 10 along the second direction D2 so that the curved bridge girder 5 is transported linearly along the predetermined direction D. As a result, the transport direction of the curved weight can be adjusted using a simple configuration, and therefore, the curved weight can be transported linearly along the predetermined direction even for the curved weight. As a result, the transport accuracy of curved weight objects can be improved, and compared to manually adjusting the transport direction of curved weight objects, the labor and cost required for manual adjustment can be reduced, and the decrease in transport work efficiency due to the stop of transport of curved weight objects and the time required for adjustment can be suppressed. In this way, the transport accuracy and transport efficiency of curved weight objects can be improved.

In addition, in the heavy load mounting device 1 according to the embodiment described above, the first conveying unit 10 can have a first conveying surface 125 that moves in the third direction D3, which is a linear direction, on which the curved bridge girder 5 is mounted, and a first adjustment unit 13 that adjusts the position of the curved bridge girder 5 on the first conveying surface 125 while the curved bridge girder 5 is conveyed in the third direction D3 by the first conveying surface 125 so that the curved bridge girder 5 is conveyed along the first direction D1. As a result, the linear movement of the conveying surface can be easily converted into the curved movement of the curved heavy load.

In addition, in the heavy load loading device 1 according to the embodiment described above, when the main surface 511 of the curved bridge girder 5 during transport is viewed in a plan view, the first adjustment unit 13 can perform a first position adjustment by rotating the curved bridge girder 5 relative to the first transport surface 125 along the curvature direction. As a result, it is possible to achieve position adjustment of the curved heavy load relative to the first transport surface, thereby improving the transport stability of the curved heavy load.

In the heavy load mounting device 1 according to the embodiment described above, the first transport unit 10 further includes an adjustment plate 150, and the curved bridge girder 5 is mounted on the first transport surface 125 via the adjustment plate 150. The adjustment plate 150 includes a first plate 151 fixed to the main surface 511 of the curved bridge girder 5 and a second plate 152 attached to the first plate 151. The first plate 151 is placed on the second plate 152 so as to be rotatable relative to the second plate 152. The first adjustment unit 13 can perform the first position adjustment by rotating the first plate 151 relative to the second plate 152. As a result, the position adjustment of the curved heavy load relative to the first transport surface is possible using a simple configuration.

In the heavy load mounting device 1 according to the embodiment described above, the first adjustment unit 13 has a first guide jack 131 and a second guide jack 132 that can expand and contract in a direction D5 intersecting with the third direction D3, and the first adjustment unit 13 can perform the first position adjustment by expanding and contracting the first guide jack 131 and the second guide jack 132 so that the first guide jack 131 and the second guide jack 132 press against the curved bridge girder 5, and rotating the first plate 151 relative to the second plate 152. As a result, the manufacturing cost of the device can be reduced by simplifying the configuration for adjusting the position of the curved heavy load.

In addition, in the heavy load mounting device 1 according to the embodiment described above, the second conveying unit 20 has a second adjustment unit 21 including a rotation axis and a rotating plate 220 on which the first conveying unit 10 is mounted, and the second adjustment unit 21 can perform a second position adjustment by rotating the first conveying unit 10 around the rotation axis as the center of rotation so that the curved bridge girder 5 moves linearly. As a result, the position of the first conveying unit can be adjusted using a simple configuration.

In addition, in the heavy load mounting device 1 according to the embodiment described above, the second transport unit 20 further has a third adjustment unit 23 on which the second adjustment unit 21 is mounted, and the third adjustment unit 23 performs a third position adjustment in which the second adjustment unit 21 moves along the fourth direction D4, which is a linear direction, while performing a second position adjustment so that the curved bridge girder 5 moves linearly along the specified direction D, and the second and third position adjustments allow the second transport unit 20 to move along the second direction D2. As a result, it is possible to transport heavy loads linearly along the specified direction, and it is possible to improve the transport accuracy of heavy loads.

In addition, in the heavy load mounting device 1 according to the embodiment described above, the second adjustment unit 21 has a rotating jack 230 that is attached to the rotating plate 220 and can rotate the rotating plate 220 by expanding and contracting, and the third adjustment unit 23 can have a moving jack that can move the second adjustment unit 21 back and forth along the fourth direction D4 by expanding and contracting. As a result, the position adjustment of the first transport unit can be achieved using a simple configuration.

In addition, in the heavy load loading device 1 according to the embodiment described above, the curved bridge girder 5 is an example of a curved heavy load, the main surface 511 is the main surface of the flange 51 of the curved bridge girder 5, and the planar shape of the main surface 511 can be a clothoid curve. As a result, it is possible to transport a clothoid curved bridge girder linearly along a predetermined direction, and the transport accuracy and transport efficiency of the bridge girder can be improved.

In the adjustment plate 150 according to the embodiment described above, the curved bridge girder 5 is mounted on the heavy load mounting device 1 via the adjustment plate 150, which has a first plate 151 fixed to the main surface 511 of the curved bridge girder 5 and a second plate 152 attached to the first plate 151, and the first plate 151 can be placed on the second plate 152 so as to be rotatable relative to the second plate 152. As a result, the mounting position of the heavy load in the transport device can be adjusted using a simple configuration.

In the adjustment plate 150 according to the embodiment described above, the first plate 151 has a first side surface 157 that is a flat surface, and the second plate 152 has a second side surface 158 that is a convex or concave arc-shaped surface that corresponds to the first side surface 157. When the first side surface 157 comes into contact with the second side surface 158 and slides due to an external force, the first plate 151 can rotate relative to the second plate 152. As a result, the adjustment configuration for the mounting position in the heavy object transport device can be simplified.

The present invention is not limited to the above-described embodiments, and designs to which a person skilled in the art may make appropriate design changes are also included within the scope of the present invention as long as they include the characteristics of the present invention. In other words, the elements of the above-described embodiments and their arrangements, materials, conditions, shapes, sizes, etc. are not limited to those exemplified, but can be modified as appropriate. Furthermore, the elements of the above-described embodiments can be combined to the extent technically possible, and combinations of these are also included within the scope of the present invention as long as they include the characteristics of the present invention.

REFERENCE SIGNS LIST 1...Heavy load mounting device 5...Curved bridge girder 10...First conveying section 13...First adjustment section 20...Second conveying section 21...Second adjustment section 23...Third adjustment section 125...First conveying surface 150...Adjustment plate 151...First plate 152...Second plate 131...First guide jack 132...Second guide jack

Claims (3)

A weight loading device capable of linearly transporting a curved weight having a flat main surface and a curved shape in a plan view of the main surface in a predetermined direction,
A first conveying unit that conveys the curved weight object in a first direction along a curvature direction of the planar shape of the main surface;
a second conveying section on which the first conveying section is mounted, and which conveys the curved weight object along the first direction while conveying the first conveying section along a second direction so that the curved weight object is conveyed linearly along the predetermined direction;
Equipped with
The first transport unit is
a first conveying surface that moves in a third direction, which is a linear direction, and on which the curved weight object is placed;
a first adjustment unit that adjusts a position of the curved weight object on the first conveying surface while the curved weight object is being conveyed in the third direction by the first conveying surface so that the curved weight object is conveyed along the first direction;
having
When the main surface of the curved weight object being conveyed is viewed in a plan view, the first adjustment unit performs a first position adjustment to rotate the curved weight object relative to the first conveying surface along the curvature direction,
The first transport section further includes an adjustment plate,
The curved weight is mounted on the first conveying surface via the adjustment plate,
The adjustment plate includes a first plate fixed to the main surface of the curved weight and a second plate attached to the first plate,
the first plate is mounted on the second plate so as to be rotatable relative to the second plate;
the first adjustment unit performs the first position adjustment by rotating the first plate relative to the second plate;
The first adjustment unit has a guide jack that is extendable and retractable in a direction intersecting the third direction,
The first adjustment unit performs the first position adjustment by extending and contracting the guide jack so that the guide jack presses the curved weight object and rotating the first plate relative to the second plate,
The second transport unit has a second adjustment unit including a rotation shaft and a rotation plate on which the first transport unit is mounted,
The second adjustment unit performs a second position adjustment to rotate the first transport unit about the rotation axis so that the curved weight object moves linearly;
The second transport unit further includes a third adjustment unit on which the second adjustment unit is mounted,
the third adjustment unit performs a third position adjustment, in which the second adjustment unit moves the second adjustment unit along a fourth direction, which is a linear direction, at the same time that the second adjustment unit performs the second position adjustment, so that the curved weight moves linearly along the predetermined direction;
the second position adjustment and the third position adjustment cause the second transport unit to move along the second direction,
the second adjustment unit has a rotary jack that is attached to the rotary plate and can rotate the rotary plate by expanding and contracting,
A heavy object mounting device , wherein the third adjustment unit has a movable jack that can extend and reciprocate the second adjustment unit along the fourth direction . In the adjusting plate,
the first plate has a first side that is a planar surface;
the second plate has a second side surface that is a convex arcuate surface or a concave arcuate surface corresponding to the first side surface,
The heavy load mounting device according to claim 1 , wherein when an external force causes the first side surface to come into contact with and slide against the second side surface, the first plate rotates relative to the second plate. The curved weight is a bridge girder,
The main surface is a main surface of a flange of the bridge girder,
The heavy load mounting device according to claim 1 or 2 , wherein the shape of the main surface in a plan view is a clothoid curve.

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