JP7467728B1 - Conveyor - Google Patents

Abstract

[Problem] To provide a transport device with a function that prevents lateral movement when an object to be transported is in a suspended state. [Solution] The device includes a hoisting means 3 that can raise and lower the object to be transported via a sling 35 and move along a support rail 11, a determination means 41 that determines whether the object to be transported is in a suspended state suspended by the sling 35 or in a non-suspended state not suspended by the sling 35, and a lateral movement control means 42 that switches between a state that prevents movement of the hoisting means 3 and a state that allows it, and the lateral movement control means 42 executes control to prevent movement of the hoisting means 3 when the determination means 41 determines that the object is in a suspended state, and executes control to allow movement of the hoisting means 3 when the determination means 41 determines that the object is in a non-suspended state. [Selected Figure] Figure 5

Description

The present invention relates to a conveying device.

For example, in deck replacement work on road bridges, etc., it is necessary to repeatedly carry out the existing deck and carry in and install the new deck. This type of work can be done using a crane truck, but when it is not possible to use the most suitable crane truck due to restrictions on the extension width of the outriggers or overhead restrictions during work, a transport device capable of transporting the deck may be installed in the work area.
As a transport device replacing a crane truck, Patent Documents 1 to 3 disclose a transport device equipped with a rail that is laid horizontally above a work area and a chain block (hoist) that can move laterally along the rail. In the transport devices of Patent Documents 1 to 3, the deck slab is lifted by the hoist and then moved laterally to move the deck slab.

JP 2004-300688 A JP 2004-300689 A JP 2022-169347 A

The deck slab, which is lifted by the hoist, is prone to swaying back and forth and side to side, and when traversing begins and stops, there is a risk that the swaying of the deck slab will increase due to the inertial force acting on the deck. Moreover, because bridges are easily exposed to strong winds, careful work is required not only when traversing begins and stops, but also while the hoist is traversing.
The above problems can be solved by adopting a work procedure in which the hoist is used only for raising and lowering the deck slab, and the deck slab is moved laterally using a separately prepared cart or the like; however, if the hoist is equipped with a function for moving the hoist laterally (a function for changing the working position of the hoist), it is desirable to prevent lateral movement when the deck slab is suspended, so as to prevent deviation from the work procedure.
From this perspective, an object of the present invention is to provide a transport device that cannot move laterally when an object to be transported is suspended.

The conveying device of the present invention comprises a lifting means capable of raising and lowering the object to be transported via a sling and moving along a support rail, a determination means for determining whether the object to be transported is in a suspended state suspended by the sling or in a non-suspended state not suspended by the sling, and a traverse control means for switching between a state that prevents movement of the lifting means and a state that allows it.
The lateral movement control means executes control to prevent movement of the suspension means when the determination means determines that the suspension state is established, and executes control to allow movement of the suspension means when the determination means determines that the suspension state is established.

Although the transport device according to the present invention is equipped with a hoisting means capable of lateral movement, it can determine whether the object to be transported is in a state of being suspended (suspended state) by a sling (wire rope sling, chain sling, belt sling, etc.), and when it is determined that the object is in a suspended state, it becomes a state of preventing the movement (lateral movement) of the hoisting means. In other words, the transport device according to the present invention can comply with the work procedure of not allowing the object to be lateral moved when it is in a suspended state.
On the other hand, when the judgment means determines that the object is not in a suspended state, the state allows the movement of the suspension means, making it possible to move the suspension means depending on the origin position of the transported object or to send it to another position of use.

The hoisting means may include a hoisting carriage capable of traveling along the support rail and a carriage drive source for applying a drive force to the hoisting carriage. In this case, it is preferable that the traverse control means deactivates the carriage drive source when the determination means determines that the hoisting state is established.
The hoisting means may include a hoisting cart capable of traveling along the support rail and a locking mechanism capable of preventing the hoisting cart from traveling. In this case, it is preferable that the traverse control means activates the locking mechanism when the determination means determines that the hoisting state is established.
When it is determined that the cart is in a suspended state, the drive source for the cart (e.g., a motor or cylinder) can be deactivated or a locking mechanism that prevents the suspension cart from moving can be activated, thereby easily and reliably preventing the suspension cart from moving sideways.

The hoisting means may include a support frame movable laterally across the support rail on the hoisting cart, a frame drive source for applying a drive force to the support frame, a feed section supported by the support frame, and a sling connected to the object to be transported and the feed section , the feed section adjusting the length of the sling to be paid out. It is preferable that the traverse control means deactivates the frame drive source when the determination means determines that the object is in the hoisted state.
The hoisting means may include a support frame movable laterally across the support rail on the hoisting cart, a locking mechanism for preventing movement of the support frame, a feed section supported by the support frame, and a sling connected to the object to be transported and the feed section , the feed section adjusting the length of the sling to be paid out. It is preferable that the traverse control means activates the locking mechanism when the determination means determines that the object is in the suspended state.
When it is determined that the frame is in a suspended state, the frame drive source (e.g., a motor, cylinder, etc.) can be deactivated or a locking mechanism that prevents the support frame from sliding can be activated, thereby easily and reliably preventing the support frame from moving (laterally).

The suspending means may include a sling connected to the transport object, a feeding section for adjusting the length of the sling, and a load cell for measuring the tensile force acting on the sling. In this case, it is preferable that the determining means determines that the object is suspended when the magnitude of the tensile force measured by the load cell exceeds a threshold value.
In this way, it is possible to easily and reliably determine whether the object to be transported is suspended from the sling (whether the weight of the object to be transported is acting on the delivery section).

This invention makes it possible to adhere to the work procedure of not moving the vehicle sideways when the object being transported is suspended.

FIG. 1 is a perspective view showing a transport device according to an embodiment. 1A and 1B are diagrams showing a conveying device according to an embodiment, in which FIG. 2A and 2B are diagrams showing a conveying device according to an embodiment, in which (a) is a cross-sectional view taken along line AA in FIG. 2B, and (b) is a cross-sectional view taken along line BB in FIG. 2B. FIG. 2 is an enlarged perspective view showing a traverse means, a suspending means, and a suspending jig in the transport device according to the embodiment. FIG. 2 is a functional block diagram of a transport device according to the embodiment. FIG. 11 is a diagram showing a series of steps for moving an existing deck to a destination by a deck moving method using a conveying device according to an embodiment, in which (a) is an oblique view showing the lifting preparation step, (b) is an oblique view showing the lifting step and the lateral movement preparation step, and (c) is an oblique view showing the lateral movement step. FIG. 13 is a diagram showing a series of processes for moving an existing deck to a destination by a deck moving method using a conveying device according to an embodiment, in which (a) is an oblique view showing the transfer process and the hanging preparation process, and (b) is an oblique view showing the hanging process. 1A and 1B are diagrams illustrating a method of moving a conveying device according to an embodiment, in which (a) is an oblique view showing a first center-of-gravity shifting operation, (b) is an oblique view showing a second center-of-gravity shifting operation in which the support legs are retracted and the center-of-gravity is transferred to the running means, and (c) is an oblique view showing the state after being transferred to the running means. 10A and 10B are diagrams illustrating a method of moving the transport device according to the embodiment, in which FIG. 10A is a perspective view showing a state when the transport device has been moved, and FIG. 10B is a perspective view showing a state in which the transport device has been returned to the fixed mode. 1A and 1B are diagrams showing a state in which a first platform unit constituting a transport device according to an embodiment is loaded onto a transport vehicle, in which FIG. 1A is a plan view and FIG. 1A and 1B are diagrams showing a state in which a second platform unit constituting a transport device according to an embodiment is loaded onto a transport vehicle, in which FIG. 1A to 1C are perspective views illustrating a first temporary placement operation for explaining a method of assembling the conveying device according to the embodiment; 1A to 1C are perspective views illustrating a first temporary placement operation for explaining a method of assembling the conveying device according to the embodiment; 11A to 11C are perspective views illustrating a second temporary placement operation for explaining a method of assembling the conveying device according to the embodiment. 1A and 1B are diagrams illustrating a method of assembling a conveying device according to an embodiment, in which (a) is an oblique view showing the connection work, (b) is an oblique view showing the posture of moving in a direction perpendicular to the support rail, and (c) is an oblique view showing the installation work of the suspension means. 1A is a perspective view showing the installation work of the suspending means, the traverse means and the suspending jig; FIG. 1B is a perspective view showing the installation work of the power supply unit; and FIG. 1C is a perspective view showing the completed assembly state.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the accompanying drawings.
1 is a perspective view of a conveying device according to an embodiment, and FIG 2 is a diagram showing the conveying device according to the embodiment, in which (a) is a plan view and (b) is a side view.
3A and 3B are diagrams showing a conveying device according to an embodiment, in which (a) is a cross-sectional view taken along line AA in FIG. 2B, and (b) is a cross-sectional view taken along line BB in FIG. 2B.
The transport device 100 according to this embodiment is a construction facility for transporting decks used when replacing an existing deck on a bridge with a new deck. The cargo carried in and out of the work site is a deck, and the object to be transported by the transport device 100 is a "deck slab 7 with a hanging jig 8 attached" or "only the hanging jig 8". The deck slab 7 shown in Figs. 1 to 3 is an existing deck, but may be a newly constructed deck. There are no limitations on the shape of the deck, and it includes not only flat decks, but also L-shaped decks integrated with a wall parapet.

1 to 3, the transport device 100 of this embodiment is installed in a work area A (the area marked with a dot in FIG. 1) and a preparation area B. Work area A is an area where the work of removing the existing deck slab and the work of installing a new deck slab are performed. Preparation area B is an area adjacent to work area A where the work of loading the existing deck slab onto a transport vehicle and the work of loading and unloading the new deck slab from the transport vehicle are performed.
In addition, the conveying device 100 can be used not only when performing both the removal of the existing deck slab and the installation of a new deck slab in work area A, but also when only performing the removal of the existing deck slab in work area A, or when only performing the installation of a new deck slab in work area A.

The transport device 100 includes a support stand 1, a traverse means 2 for traversing an object to be transported, and a hoisting means 3 for raising and lowering the object to be transported. The transport device 100 also includes a control device 4 (see FIG. 5 ) for controlling the traverse means 2 and the hoisting means 3, and a power supply unit 5 for supplying power to the traverse means 2 and the hoisting means 3.
That is, the transport device 100 is a construction facility configured by mounting various equipment units (traverse means 2, lifting means 3, power supply unit 5, etc.) on a support stand 1 for lifting and transporting the object to be transported.

<Support stand>
The support stand 1 is a structure that supports the equipment unit and is installed in the work area A and the preparation area B.
The support stand 1 is switchable between a fixed mode (see Figures 1 to 3, 6, and 7), which is a mode in which the deck slab is transported in and out using an equipment unit, and a movable mode (see Figure 8 (c)), which is a mode in which the conveying device 100 is relocated.
When the support cradle 1 itself is transported to and from a work site (see FIGS. 12 to 14), it is divided into a plurality of (two in this embodiment) cradle units 1A, 1B. That is, the support cradle 1 in this embodiment is formed by connecting two cradle units 1A, 1B. In the fixed mode, one cradle unit 1A (first cradle unit 1A) is installed in the work area A, and the other cradle unit 1B (second cradle unit 1B) is installed in the preparation area B. The number of divisions of the support cradle 1 and the installation locations of the cradle units 1A, 1B may be appropriately set according to the size of the support cradle 1 and the conditions of the work site.

The support cradle 1 includes a plurality of support rails 11 arranged in parallel above the working area A and the preparation area B, a plurality of supports 12 supporting the support rails 11, and a cross beam 13 connecting adjacent support rails 11, 11. In this embodiment, the support rails 11, the supports 12, and the cross beam 13 form the main body of the support cradle 1 (a structure in the fixed mode).
The support stand 1 also includes a running means 14, a first support leg 15, a second support leg 16, and a transport support leg 17 as equipment used in modes other than the fixed mode.

For the sake of convenience, in the following description, the longitudinal direction of the support rail 11 is referred to as the front-rear direction (the left side of FIG. 1 is the "front side" and the right side is the "rear side"), and the lateral direction perpendicular to the longitudinal direction of the support rail 11 is referred to as the left-right direction.

The support rail 11 is a member that supports the traverse means 2 and the hoisting means 3, and is installed above the origin and destination of the transport object. In this embodiment, two support rails 11, 11 are installed side by side with a gap between them on the left and right.
As shown in FIG. 3(b), the support rail 11 includes a main girder 11a, an upper rail 11b provided on the upper surface of the main girder 11a, and a lower rail 11c provided on the lower surface of the main girder 11a.
The main girder 11a is a member having the strength and rigidity to withstand the weight of the equipment unit and the object to be transported, and is made of an I-beam with flanges arranged above and below.
The upper rail 11b is a member that guides the lateral movement of the lateral movement means 2, and is made of a square steel pipe and fixed to the upper surface of the upper flange of the main girder 11a.
The lower rail 11c is a member that guides the lateral movement of the lifting means 3, and is made of an I-beam with flanges arranged above and below, and is fixed to the underside of the lower flange of the main girder 11a.
The type of steel material constituting the main girder 11a, upper rail 11b, and lower rail 11c is not particularly limited, and can be appropriately selected from I-beams, H-beams, channel steel, square steel pipes, etc.

As shown in Figures 1 and 2, each support rail 11 has a work side rail portion 11A that is positioned above the work area A, and a preparation side rail portion 11B that is positioned above the preparation area B. The work side rail portion 11A is a member that constitutes the first stand unit 1A, and the preparation side rail portion 11B is a member that constitutes the second stand unit 1B.

The supports 12 are members that support the support rails 11 and are erected on the deck. In this embodiment, the supports 12 are disposed at both ends and the middle of each support rail 11. Note that the positions and number of the supports 12 are not limited to those shown in the figure, and can be changed depending on the length of the support rails 11, the weight of the equipment unit, etc.
As shown in FIG. 1, the support 12 includes a bracket 12a attached to the support rail 11 and a main post 12b attached to the bracket 12a.
The bracket 12a protrudes laterally from the outer surface (web of the main girder 11a) of the support rail 11. The bracket 12a connects the support rail 11 to the main support column 12b.
The main support 12b extends downward from the bracket 12a. The main support 12b has a length adjustment mechanism. The main support 12b in this embodiment is a linear actuator (e.g., a hydraulic jack, etc.) and includes a cylinder attached to the bracket 12a, a rod that can be extended and retracted from the cylinder, and a shoe attached to the lower end of the rod.

One of the three supports 12 supporting one support rail 11 is connected to the front end of the work side rail section 11A, and the remaining two are connected to both ends of the preparation side rail section 11B. The support 12 connected to the work side rail section 11A is a member that constitutes the first stand unit 1A, and the support 12 connected to the preparation side rail section 11B is a member that constitutes the second stand unit 1B.

The cross beam 13 is a member that maintains the distance between the support rails 11, 11 adjacent to each other on the left and right. In this embodiment, the cross beam 13 is installed on the support rails 11, 11 between the supports 12, 12 adjacent to each other on the left and right. In other words, the cross beam 13 is disposed at both ends and the middle part of the support rail 11. Note that the position and number of the cross beams 13 are not limited to those shown in the figure, and can be changed depending on the length of the support rail 11, etc.
The cross beam 13 includes a girder support portion 13a fixed to the inner surface (web of the main girder 11a) of the support rail 11, and a girder body portion 13b connected to the girder support portion 13a. The cross beam 13 of this embodiment includes a pair of left and right girder support portions 13a, 13a, and a girder body portion 13b installed between the left and right girder support portions 13a, 13a.
The girder support portion 13a protrudes from the inner surface of one support rail 11 toward the other support rail 11. The girder support portion 13a has a square cylindrical shape and is capable of receiving an end of the girder main body portion 13b.
The girder main body 13b has a rectangular cylindrical shape. An end of the girder main body 13b is inserted into the girder support 13a. The girder main body 13b is slidable relative to the girder support 13a. A length adjustment mechanism for the cross beam 13 is formed by slidably connecting the girder support 13a and the girder main body 13b. That is, when the insertion length of the girder main body 13b into the girder support 13a is increased, the cross beam 13 is contracted, and when the girder main body 13b is pulled out from the girder support 13a, the cross beam 13 is extended.
The girder support 13a may be disposed on only one end of the girder body 13b. In this case, the other end of the girder body 13b is directly fixed to the support rail 11.

The travel means 14 is used when moving the conveying device 100 (or the conveying device 100 in the middle of assembly). The support stand 1 of this embodiment is equipped with four travel means 14, 14, ..., two on each side. All four travel means 14, 14, ... are provided on the stand unit 1B.
The traveling means 14 is a multi-axle, multi-wheel (two axles, four wheels in this embodiment) trackless bogie, and is equipped with a drive source (e.g., an in-wheel motor) that rotates the axles. Note that the traveling means 14 may be a rail-type bogie, and there is no restriction on the number of axles, the number of wheels, the type of drive source, or the presence or absence of a drive source.
The traveling means 14 in this embodiment is attached to the lower end of the second support leg 16 and can rotate around an axis perpendicular to the traveling surface (the upper surface of the deck, etc.). That is, the traveling means 14 can travel on the deck in the longitudinal direction of the support rail 11 (the bridge axis direction) and can travel on the deck in the longitudinal direction of the cross beam 13 (the direction perpendicular to the bridge axis). In this embodiment, the traverse means 2 and the lifting means 3 are moved to the second frame unit 1B and the entire transport device 100 is made low-headed, so that the center of gravity of the transport device 100 moves to the frame unit 1B side and downward, and the transport device 100 can travel using only the four traveling means 14 (see FIG. 8(c)).

The first support legs 15 are loading support legs used when the first platform unit 1A transported by the transport vehicle 6 is removed from the loading platform 61 or when the platform unit 1A is loaded onto the loading platform 61 (see Figures 12 and 13). The platform unit 1A is provided with four first support legs 15, 15, ..., two on each side. The position and number of the first support legs 15 can be changed depending on the platform unit 1A, its size, weight, etc., but it is preferable to provide at least three first support legs 15 that are not aligned in a straight line.

The first support leg 15 comprises a bracket 15a attached to the working side rail portion 11A of the support rail 11, an extension portion 15b (see Figure 12 (b)) connected to the bracket 15a, and an auxiliary support pillar 15c attached to the extension portion 15b.
The bracket 15a protrudes laterally from the outer surface of the working rail portion 11 A. The bracket 15a has a rectangular cylindrical shape and is capable of receiving the end of the protruding portion 15b.
The protrusion 15b (see FIG. 12(b)) has a square cylindrical shape and is inserted into the bracket 15a. The protrusion 15b can move forward and backward relative to the bracket 15a. In other words, the box-shaped bracket 15a is attached to the web of the working side rail portion 11A, and the box-shaped protrusion 15b is inserted into the box-shaped bracket 15a, so that the protrusion 15b can be pulled out from the bracket 15a. A reinforcing portion 15d made of a stiffener is formed on the opposite side of the bracket 15a across the web of the working side rail portion 11A.
The auxiliary column 15c is attached to the end of the overhanging portion 15b. The auxiliary column 15c can rotate around a horizontal axis at the end of the overhanging portion 15b, and can select a storage state along the support rail 11 (see FIG. 1) and a use state along the vertical direction (see FIGS. 12(b) and (c)). The auxiliary column 15c has a length adjustment mechanism. The auxiliary column 15c in this embodiment is a linear actuator (e.g., a hydraulic jack, etc.), and includes a cylinder attached to the overhanging portion 15b, a rod that can be inserted and removed from the cylinder, and a shoe attached to the tip of the rod. The auxiliary column 15c can raise and lower the first frame unit 1A when erected on the floor slab.
As described above, the first support leg 15 is a loading/unloading support leg used in a mode other than the fixed mode, and is equipped with an extension portion (bracket 15a and protrusion portion 15b) extending laterally from the main body (work side rail portion 11A) of the first mounting unit 1A, and an auxiliary support pillar 15c (see Figures 12 (b) and (c)) extending downward from the extension portion.

The second support leg 16 is interposed between the support rail 11 and the traveling means 14. When the second gantry unit 1B carried by the transport vehicle 6 is unloaded from the loading platform 61, and when the gantry unit 1B is loaded onto the loading platform 61, the second support leg 16 functions as a loading support leg together with the traveling means 14 (see FIGS. 13 and 14).
The second gantry unit 1B is provided with two on each side, a total of four second support legs 16, 16, .... The positions and number of the second support legs 16 are not limited to those shown in the figure and can be changed depending on the gantry unit 1B, its size, weight, etc., but it is preferable to provide at least three second support legs 16 that are not aligned in a straight line.

The second support leg 16 comprises a bracket 16a attached to the preparation side rail portion 11B of the support rail 11, an extension portion 16b connected to the bracket 16a, and an auxiliary support pillar 16c attached to the extension portion 16b.
The bracket 16a protrudes laterally from the outer surface of the preparation-side rail portion 11B. The bracket 16a has a rectangular cylindrical shape and is capable of receiving the end of the protruding portion 16b.
The overhanging portion 16b has a square cylindrical shape and is inserted into the bracket 16a. The overhanging portion 16b can advance and retreat relative to the bracket 16a. That is, the box-shaped bracket 16a is attached to the web of the preparation-side rail portion 11B, and the box-shaped overhanging portion 16b is inserted into the box-shaped bracket 16a, so that the overhanging portion 16b can be pulled out from the bracket 16a. A reinforcing portion 16d made of a stiffener is formed on the opposite side of the bracket 16a across the web of the preparation-side rail portion 11B.
The auxiliary support 16c is attached to the end of the overhanging portion 16b. The auxiliary support 16c has a length adjustment mechanism. The auxiliary support 16c in this embodiment is a linear actuator (e.g., a hydraulic jack, etc.), and includes a cylinder attached to the overhanging portion 16b and a rod that can be extended and retracted from the cylinder. The lower end of the rod is attached to the traveling means 14. The auxiliary support 16c can raise and lower the frame unit 1B in a state in which the traveling means 14 is in contact with a traveling surface (such as the upper surface of the deck) (in a state in which the auxiliary support 16c is erected on the traveling surface).
As described above, the second support leg 16 is a loading/unloading support leg used in modes other than the fixed mode, and is equipped with an extension portion (bracket 16a and protrusion portion 16b) extending laterally from the main body (preparation side rail portion 11B) of the second mounting unit 1B, and an auxiliary support pillar 16c (see Figure 14 (b)) extending downward from the extension portion.

The transport support legs 17 are used when the first gantry unit 1A is transported by the transport vehicle 6 or when the gantry unit 1A is made to stand on its own (see Figs. 12 and 13). That is, the transport support legs 17 are used to increase the stability of the gantry unit 1A during transportation and assembly, and can be erected on the loading platform 61 or the running surface of the transport vehicle 6.
The first gantry unit 1A is provided with two support legs for transportation 17, 17, ..., one on each side. The positions and number of the support legs for transportation 17 are not limited to those shown in the figure, and can be changed depending on the gantry unit 1A, its size, weight, etc.
The transport support leg 17 includes a rotating base 17a attached to the working side rail portion 11A of the support rail 11, and an auxiliary support 17b attached to the rotating base 17a.
The rotating base 17a is attached to the outer surface (web) of the working side rail portion 11A.
The auxiliary support column 17b is attached to the rotating base 17a. The auxiliary support column 17b is rotatable about a horizontal axis provided on the rotating base 17a, and can be selected between a stored state along the support rail 11 (see FIG. 1) and a usage state along the vertical direction (see FIGS. 12 and 13).

<Transgressive methods>
The traverse means 2 has a function of traversing an object to be transported (such as a deck slab 7 having a hanging jig 8 attached thereto) laterally, and is supported by the support frame 1. The traverse means 2 in this embodiment is capable of moving along the support rails 11 while holding an object to be transported that is not suspended by the suspension means 3. The traverse means 2 is disposed below the support rails 11.
Fig. 4 is an enlarged perspective view showing the traverse means 2, the suspending means 3 and the suspending jig 8. Note that in Fig. 4, the support rail 11 is omitted.
The traverse means 2 is configured to move (traverse) in the front-rear direction and includes a traverse carriage 21 capable of running along the support rails 11 (see FIGS. 1 to 3) and a carriage drive source 22 that applies a drive force to the traverse carriage 21. The traverse means 2 also includes a holding section 23 that can hold the transport object and a holding section drive source 24 that applies a drive force to the holding section 23.

The traverse bogie 21 is a suspended bogie, and includes a rectangular frame formed by combining steel materials, and driving wheels 21a and driven wheels 21b provided on the frame. The driving wheels 21a and driven wheels 21b are supported by a bearing plate 21c provided upright on the frame. The driving wheels 21a and driven wheels 21b engage with a lower flange of a lower rail 11c (see FIG. 3(b)) of the support rail 11, and roll on the upper surface of the lower flange. The number and arrangement of the driving wheels 21a and driven wheels 21b may be appropriately set according to the shape of the frame, the load balance, and the like.
The traverse bogie 21 includes a support rail 21d. The support rail 21d is a member that guides the movement (transverse movement) of the support 23 in the left-right direction, and is fixed to the upper surface of the frame.
Although not shown in the figure, a locking mechanism for switching between a state that prevents lateral movement (forward and backward movement) of the lateral travelling trolley 21 and a state that allows it may be provided on the lateral travelling trolley 21 with a stopper that engages with the support frame 1, or a stopper that engages with the lateral travelling trolley 21 may be provided on the support frame 1.
The bogie drive source 22 is a drive source (e.g., an electric motor) that rotates the axle of the drive wheels 21a, and is mounted on the frame of the traverse bogie 21. When the traverse bogie 21 is towed by a wire or the like, the bogie drive source is attached to the support frame 1.

The holding section 23 is supported by the lateral carriage 21 and can move in a lateral direction (left/right direction) intersecting the support rail 11 even when it is holding an object to be transported that is not suspended by the suspension means 3.
The holding portion 23 in this embodiment comprises a pair of front and rear arms 23a, 23a hanging down from the transverse cart 21, a base 23b supported by the arms 23a, 23a, a rotating body 23c that can rotate around an axis in the vertical direction, and a hooking portion 23d provided on the rotating body 23c.

The arms 23a, 23a are disposed at the front and rear of the transverse bogie 21 and face each other with the transverse bogie 21 in between. That is, one arm 23a is disposed on the front side of the transverse bogie 21, and the other arm 23a is disposed on the rear side of the transverse bogie 21. The arm 23a extends downward from the frame of the transverse bogie 21.
The arm 23a can move laterally (left and right) along the retaining rail 21d. The upper end of the arm 23a covers the retaining rail 21d from above and is placed on the frame via wheels (not shown). The wheels are built into the upper end of the arm 23a and roll on the frame along the retaining rail 21d.
The base 23b is mounted on the arms 23a, 23a below the traverse cart 21. The base 23b includes a substantially circular base body that supports the rotating body 23c and a flange that protrudes from the base body to the lower side of the arm 23a. Although not shown, the base 23b includes an annular receiving portion (e.g., a thrust ball bearing) that supports the rotating body 23c. The lower end of the arm 23a is joined to the flange of the base 23b.

The rotating body 23c is disposed below the base 23b. The rotating body 23c is placed on a receiving portion of the base 23b, and rotates relative to the base 23b while transmitting a downward load acting on the rotating body 23c to the base 23b. A gear (e.g., a spur gear) is formed on the outer circumferential surface of the rotating body 23c. Although not shown, a pinion meshes with the gear of the rotating body 23c. An electric motor (not shown), which is one of the holding part drive sources 24, is attached to the arm 23a or the base 23b, and the driving force of the electric motor is transmitted to the gear via the pinion, causing the rotating body 23c to rotate.
The hook 23d can be hooked to the lifting jig 8 without a sling. As shown in Fig. 3(b) , the hook 23d in this embodiment is an L-shaped hook protruding from the underside of the revolving body 23c. A plurality of the hooks 23d (two in this embodiment) are arranged at intervals in the circumferential direction of a virtual circle centered on the central axis of rotation of the revolving body 23c.

4, an opening 23e that vertically penetrates the base 23b and the rotating body 23c is formed in the center of the holding part 23. The opening 23e has a size that allows the sling 35 to be inserted therethrough, and is formed at a position that does not overlap with the frame, the arm 23a, and the holding part drive source 24 of the traverse cart 21 in a plan view.
Although not shown in the figure, a locking mechanism that switches between a state that prevents lateral movement (movement in the left and right direction) of the holding portion 23 and a state that allows it may be provided with a stopper on the holding portion 23 that engages with the lateral movement trolley 21, or a stopper that engages with the holding portion 23 may be provided on the lateral movement trolley 21.

The holding part driving source 24 includes a first driving source 24a for moving the holding part 23 along the holding part rail 21d, and a second driving source (not shown) for rotating the rotating body 23c.
The first driving source 24a in this embodiment is a linear actuator (e.g., an electric actuator) arranged below the traverse carriage 21, and includes a cylinder and a rod that advances and retracts relative to the cylinder. The first driving source 24a is fixed to the traverse carriage 21 and one of the arms 23a. In this embodiment, the tip of the rod is fixed to one end (the left end in this embodiment) in the left-right direction of the traverse carriage 21, and the cylinder is fixed to one of the arms 23a. The first driving source 24a slides the holding portion 23 by pushing and pulling the one of the arms 23a with a reaction force against the traverse carriage 21. It is preferable that the maximum output of the first driving source 24a is set to a value that does not allow the holding portion 23 to move in a state in which the object to be transported is held. In addition, instead of the linear actuator, an electric motor that drives a wheel built into the arm 23a may be used as the first driving source.
The second drive source (not shown) is an electric motor attached to the arm portion 23a or the base portion 23b, and rotates the rotating body 23dc by rotating a pinion meshing with the gear of the rotating body 23dc in forward and reverse directions.

<Suspension Means>
The hoisting means 3 has a function of lifting the transported object from the transport source toward the traverse means 2, and a function of lowering the transported object from the traverse means 2 toward the transport destination, and is supported by the support frame 1. The hoisting means 3 is disposed above the traverse means 2. In this manner, it is possible to shorten the lifting height of the hoisting means 3.
The hoisting means 3 in this embodiment is disposed above the support rail 11, and is movable along the support rail 11 when it is not suspending an object to be transported. That is, the hoisting means 3 is capable of raising and lowering the object to be transported via the sling 35, and is also capable of moving along the support rail 11. Note that a state in which the object to be transported is not being suspended refers, for example, to a state in which the sling 35 has become detached from the object to be transported, or a state in which the sling 35 is connected to the object to be transported but is loose.
As shown in Fig. 4, the hoisting means 3 includes, as components for moving in the front-rear direction (lateral movement), a hoisting cart 31 capable of running along the support rails 11 (see Figs. 1 to 3), and a cart drive source 32 that applies a drive force to the hoisting cart 31. The hoisting means 3 also includes, as components for moving in the left-right direction (lateral movement), a support frame 33 that is movable laterally on the hoisting cart 31, and a frame drive source 34 that applies a drive force to the support frame 33. The hoisting means 3 also includes, as components for lifting and lowering the object to be transported, a sling 35 connected to the object to be transported, a feed section 36 that adjusts the payout length of the sling 35, and a load cell 37 that measures the tensile force acting on the sling 35.

The hoisting cart 31 includes a rectangular frame formed by combining steel materials, and driving wheels 31a and driven wheels 31b provided on the frame. The driving wheels 31a and driven wheels 31b engage with the upper rails 11b (see FIG. 3(b)) of the support rails 11 and roll on the upper surface of the upper rails 11b. The number and arrangement of the driving wheels 31a and driven wheels 31b may be appropriately determined according to the shape of the frame, the load balance, and the like.
The hoisting cart 31 is equipped with a support frame rail 31c. The support frame rail 31c is a member that guides the lateral movement of the support frame 33 in the left-right direction, and is fixed to the upper surface of the frame. The support frame rail 31c has a locking groove recessed forward or backward.
Although not shown in the figure, a locking mechanism for switching between a state that prevents lateral movement (forward and backward movement) of the lifting cart 31 and a state that allows it may be provided on the lifting cart 31 with a stopper that engages with the support frame 1, or a stopper that engages with the lifting cart 31 may be provided on the support frame 1.
3(b) is a drive source (e.g., an electric motor) that rotates the axle of the drive wheel 31a, and is mounted under the frame of the hoisting cart 31. The maximum output (maximum torque) of the cart drive source 32 is preferably set to a value that does not allow the axle of the drive wheel 31a to rotate when the transport object is suspended from the hoisting means 3. When the hoisting cart 31 is towed by a wire or the like, the cart drive source is attached to the support frame 1.

The support frame 33 shown in Fig. 4 is a frame that supports the delivery section 36, and is placed on the hoisting cart 31. When the support frame 33 is not suspending an object to be transported, it is movable in a lateral direction (left-right direction) that intersects with the support rails 11. When the support frame 33 is moved left-right (transversely), the sling 35 can be aligned with the center of gravity of the object to be transported, so that the posture of the object to be transported when suspended can be stabilized.
The support frame 33 in this embodiment comprises a pair of support beams 33a, 33a arranged at a distance from one another, a spacer 33b arranged on one end side of the support beam 33a, a mounting base 33c arranged on the other end side of the support beam 33a, and a rail 33d for the output section arranged on the upper surface of the support beam 33a.

The support beams 33a, 33a are members that support some of the components of the feed-out section 36, and are arranged in parallel with a gap between them on the left and right (short side direction of the support beams 33a). The length of the support beams 33a is greater than the depth of the underframe of the hoisting cart 31, and the front and rear ends of the support beams 33a are located in front of and behind the underframe, respectively. In other words, the support beams 33a protrude in front of and behind the underframe of the hoisting cart 31. The support beams 33a are made of, for example, an I-beam with flanges arranged above and below.
The spacer 33b is a member that maintains the gap between the front ends of the support beams 33a, 33a, and connects the front ends of the support beams 33a, 33a together.
The mounting seat 33c is a member that supports some of the components of the feed section 36, and is provided on the rear ends of the support beams 33a, 33a. The mounting seat 33c in this embodiment has a central portion that connects the rear ends of the support beams 33a, 33a, and protruding portions that protrude to the left and right of the support beams 33a, 33a.
The output section rail 33d is a member that guides a member that slides in the forward/backward direction among the components of the output section 36, and is fixed to the upper surface of the support beam 33a.

The support frame 33 has a slit 33e extending in the front-rear direction. The slit 33e penetrates a side surface (web) of a portion of the support beam 33a that protrudes forward beyond the frame of the hoisting cart 31.
Although not shown, the support frame 33 further includes a deviation prevention part that fits into the locking groove of the support frame rail 31c, wheels that roll on the support frame rail 31c, etc. By locking the deviation prevention part provided on the support frame 33 into the locking groove of the support frame rail 31c, the support frame 33 is prevented from moving forward and backward or from floating up.

The frame drive source 34 is a drive source for moving the support frame 33 along the support frame rail 31c.
The frame driving source 34 in this embodiment is a linear actuator (e.g., an electric actuator) arranged above the hoisting cart 31, and includes a cylinder and a rod that advances and retracts relative to the cylinder. The frame driving source 34 is fixed to the hoisting cart 31 and one of the support beams 33a. In this embodiment, the tip of the rod is fixed to the hoisting cart 31, and the cylinder is fixed to one of the support beams 33a. The frame driving source 34 applies a reaction force to the hoisting cart 31 to push and pull the one of the support beams 33a, thereby moving the support frame 33 laterally.
When a linear actuator with a large stroke is used as the frame drive source 34, the linear actuator may be fixed to one end of the hoisting cart 31 in the left-right direction and to the support beam 33a far from the one end of the hoisting cart 31. In this case, the electric actuator is disposed so as to penetrate or cross the support beam 33a closer to the one end of the hoisting cart 31. The frame drive source 34 (electric actuator) in this embodiment penetrates the left support beam 33a. The tip of the rod is fixed to the left end of the hoisting cart 31, and the cylinder is fixed to the right side surface of the support beam 33a far from the left end of the hoisting cart 31 (the right support beam 33a). The electric actuator may be fixed to the support beam 33a closer to one end of the hoisting cart 31 (the left side in this embodiment).
The maximum output of the frame drive source 34 is preferably set to a value that does not allow the support frame 33 to move while the transport object is suspended. Instead of a linear actuator, an electric motor that drives wheels built into the support beams 33a or a winch that pulls the support frame 33 via a wire may be used as the frame drive source.

The sling 35 hangs down from the lifting means 3 and passes through the traverse means 2 to the object to be transported. The sling 35 is, for example, a wire rope sling, a chain sling, a belt sling, etc. The lower end of the sling 35 is formed with a hook that is hooked onto the lifting jig 8.

The feeding unit 36 adjusts the length of the sling 35, and is mounted on the support frame 33. That is, the feeding unit 36 is supported by the hoisting cart 31 via the support frame 33, and slides together with the support frame 33 in the lateral direction intersecting with the support rail 11.
The output section 36 in this embodiment includes a fixed sheave 36a supported by the support frame 33, a slide section 36b slidably supported on the support frame 33, a movable sheave 36c which moves towards and away from the fixed sheave 36a, and a linear actuator 36d which moves the slide section 36b towards and away from the fixed sheave 36a.

The fixed sheave 36a is disposed between the support beams 33a, 33a, and is supported by a shaft portion that is installed between the support beams 33a, 33a. The fixed sheave 36a may be disposed above or below the support beam 33a, but when the fixed sheave 36a is disposed between the support beams 33a, 33a, the height of the feed unit 36 is reduced, making the feed unit 36 compact.
The fixed sheave 36a is disposed above the frame of the hoisting cart 31, and at least the rear end of the fixed sheave 36a is located above the center (opening) of the frame. At least one (two in this embodiment) groove is formed on the outer periphery of the fixed sheave 36a, around which the sling 35 is looped.

The slide portion 36b is disposed between the support beams 33a, 33a, and slides in the front-rear direction along the left and right rails 33d, 33d for the driving section. The left and right edges of the slide portion 36b are provided with a mechanism for sliding the upper surface of the support beam 33a along the rails 33d for the driving section. Although not shown in the figure, wheels may be attached to the left and right edges of the slide portion 36b, and the slide portion 36b may be placed on the upper surface of the support beam 33a via the wheels. The slide portion 36b may be disposed above or below the support beam 33a, but if it is disposed between the support beams 33a, 33a, the height of the driving section 36 is reduced, making the driving section 36 compact.
The slide portion 36 b includes a sling connection portion 361 and a sheave support portion 362 .
The sling connection part 361 is provided in front of the moving sheave 36c and at a position higher than the fixed sheave 35a and the moving sheave 36c. An end of the sling 35 extending obliquely upward from the fixed sheave 36a is connected to the sling connection part 361.
The sheave support portion 362 includes a pair of bearing plates that face each other with the moving sheave 36c therebetween, and a shaft portion 363 that is mounted on both bearing plates. The sheave support portion 362 faces a side surface (web) of the support beam 33a with a gap therebetween.
The shaft portion 363 passes through the slit 33e of the support beam 33a and protrudes to the outside of the support frame 33. When the slide portion 36b slides in the front-rear direction, the shaft portion 363 slides in the front-rear direction within the slit 33e. In other words, the slit 33e functions as a guide for the slide portion 36b.

The movable sheave 36c is disposed between the support beams 33a, 33a in front of the fixed sheave 36a, and is supported by the shaft portion 363 of the slide portion 36b. The movable sheave 36c may be disposed above or below the support beam 33a, but disposing the movable sheave 36c between the support beams 33a, 33a reduces the height of the feed section 36, making the feed section 36 compact.
At least one groove (one in this embodiment) through which the sling 35 is wound is formed on the outer periphery of the movable sheave 36c.

The linear actuators 36d are disposed on both sides of the support frame 33 (i.e., on both sides of the support beams 33a, 33a). Each linear actuator 36d is disposed laterally of the support beam 33a.
The linear actuator 36d includes a cylinder and a rod that advances and retracts relative to the cylinder. The linear actuator 36d is fixed to the support frame 33 and the slide portion 36b. In this embodiment, the cylinder is fixed to the mounting seat 33c (more specifically, the protruding portion of the mounting seat 33c) of the support frame 33, and the tip of the rod is fixed to the shaft portion 363 of the slide portion 36b. The linear actuator 36d pushes and pulls the shaft portion 363 by applying a reaction force to the support frame 33, thereby sliding the slide portion 36b in the front-rear direction. When the shaft portion 363 is pushed and pulled, the upper and lower edges of the slit 33e suppress the vertical movement of the shaft portion 363.

In the lifting means 3 of this embodiment, the sling 35 heading from the transported object toward the sling connection part 361 reaches the sling connection part 361 via the fixed sheave 36a and the movable sheave 36c.
More specifically, the sling 35 extending upward from the object to be transported is wrapped around one groove of the fixed sheave 36a from the rear side by approximately a quarter of a turn toward the movable sheave 36c, wrapped around a groove of the movable sheave 36c from above by approximately half a turn toward the fixed sheave 36a again, and then wrapped around the other groove of the fixed sheave 36a from below by approximately half a turn before being connected to the sling connection part 361.
Then, when the rod of the linear actuator 36d is advanced to move the slide portion 36b forward, the sling connection portion 361 and the movable sheave 36c move away from the fixed sheave 36a, and the length of the sling 35 wound around the delivery portion 36 increases, causing the lower end of the sling 35 (the end facing the object to be transported) to rise.
In addition, when the rod of the linear actuator 36d is retracted and the slide portion 36b is moved rearward, the sling connection portion 361 and the movable sheave 36c approach the fixed sheave 36a, and the length of the sling 35 wound around the feeding portion 36 decreases, causing the lower end of the sling 35 (the end on the side of the object to be transported) to descend.

When moving the slide portion 36b forward and backward, it is preferable to synchronize the stroke amount and forward and backward speed of the pair of linear actuators 36d, 36d. When the pair of linear actuators 36d, 36d are synchronized, no force is generated that tends to rotate the slide portion 36b around the vertical axis, and the linearity of the slide portion 36b is improved. In other words, interference between the feed rail 33d and the slide portion 36b is suppressed, making it possible to smoothly raise and lower the object to be moved.

As described above, the lifting means 3 adjusts the extension length of the sling 35 using the linear actuator 36d, but because it uses general-purpose equipment and materials, the specifications and layout of the equipment can be easily changed depending on the construction conditions.
For example, the linear actuator 36d is not limited to being electrically operated, but may be of a hydraulic type.
Furthermore, the number of grooves in the fixed sheave 36a and the number of grooves in the movable sheave 36c can be changed as appropriate according to the extension length of the sling 35 and the stroke amount of the linear actuator 36d.
If the length of the sling 35 extended is equal to or less than the stroke of the linear actuator 36d, the movable sheave 36c may be omitted. In this case, the fixed sheave 36a may have only one groove.
Furthermore, by providing the movable sheave 36c, the force required to hoist the object to be transported is smaller than the weight of the object to be transported, making it possible to hoist an object to be transported that is heavier than the output (thrust) of the linear actuator 36d.
Incidentally, in this embodiment, three slings 35 are arranged between the fixed sheave 36a and the slide portion 36b, so the extension length of the slings 35 (the lifting height of the lifting means 3) is three times the stroke amount of the linear actuator 36d.

The load cell 37 is a load meter that measures the tensile force acting on the sling 35. In this embodiment, the load cell 37 is interposed between the end of the sling 35 and the sling connection part 361 of the slide part 36b. The data acquired by the load cell 37 is output to the control device (see FIG. 5).

<Control device>
FIG. 5 is a functional block diagram of the conveying device 100 according to the embodiment.
The control device 4 controls the traverse means 2 and the hoisting means 3 based on data acquired by the load cell 37 or commands from the controller C. The control device 4 can be provided in the support frame 1 or the equipment unit (traverse means 2, hoisting means 3, power supply unit 5). The control device 4 in this embodiment includes a determination means 41, a traverse control means 42, a lift control device 43, and a rotation control means 44.

The determination means 41 determines whether the object to be transported is suspended from the sling 35 (suspended state), and outputs the determination result to the traverse control means 42, the lift control device 43, and the rotation control means 44.
The determination means 41 of this embodiment determines whether or not the object is in a suspended state based on the data (magnitude of tensile force) acquired by the load cell 37. That is, when the magnitude of the tensile force measured by the load cell 37 exceeds a threshold value, the determination means 41 determines that the object is suspended from the sling 35 (suspended state), and when the magnitude is equal to or less than the threshold value, the determination means 41 determines that the object is not suspended from the sling 35 (non-suspended state). Since the tensile force value output from the load cell 37 reflects the tensile force acting on the sling 35, the use of the data acquired by the load cell 37 makes it possible to easily and reliably determine whether or not the object is in a suspended state (i.e., whether or not the weight of the object is acting on the maneuvering section 36).
The threshold value may be set each time based on the weight of the object to be transported (deck slab 7 and hanging jig 8), or it may be set to a fixed value below the weight of the hanging jig 8, assuming that the object to be transported is only the hanging jig 8.

The traverse control means 42 has a function of controlling the output of various drive sources so that the movement direction and movement speed of the components that can move traversely (the traverse carriage 21 and the holding part 23 of the traverse means 2, and the hoisting carriage 31 and the support frame 33 of the hoisting means 3) are as operated by the controller C. The traverse control means 42 of this embodiment further has a function of switching between a state in which the movement of the traverse means 2 and the hoisting means 3 is prevented (traverse prevention state) and a state in which the movement is permitted (traverse permitted state). That is, when the determination means 41 determines that the traverse control means 42 is in the suspended state, the traverse control means 42 executes control (traverse prevention control) to prevent the movement of the traverse means 2 and the hoisting means 3 (movement in the forward/rearward direction and movement in the left/right direction), and when the determination means 41 determines that the hoisting state is not maintained, the traverse control means 42 executes control (traverse permission control) to permit the movement of the traverse means 2 and the hoisting means 3.
When the judgment means 41 determines that the traverse means 2 is in a suspended state and the traverse control means 42 executes traverse prevention control, the traverse means 2 and the suspension means 3 enter a traverse prevention state, and the stopped state is maintained even if the control device 4 is instructed via the controller C to move the traverse means 2 or the suspension means 3 (movement in the forward/backward direction or left/right direction).
The traverse prevention control is, for example, control to deactivate the driving sources of the traverse means 2 (cart driving source 22, holder driving source 24) and the driving sources of the hoisting means 3 (cart driving source 32, frame driving source 34). When the driving sources are electrically driven, it is preferable to execute control to stop the supply of electricity to the driving sources (control to turn off the switch of the power supply circuit) as the control to deactivate the driving sources. When the driving sources are operated by fluid pressure (hydraulic pressure, pneumatic pressure, etc.), it is preferable to execute control to stop the supply of fluid (control to stop the pump, control to close an on-off valve provided in the fluid flow path, etc.) or control to relieve fluid pressure as the control to deactivate the driving sources.
In addition, if a locking mechanism (such as a stopper) is provided to prevent the lateral movement of the lateral movement cart 21, holding part 23, hoisting cart 31 and support frame 33, the lateral movement control means 42 executes control to activate the locking mechanism (such as control to cause a stopper to appear) as lateral movement prevention control.

The lifting control device 43 has a function of controlling the linear actuator 36d of the delivery section 36 so that the operation of lifting and lowering the transport object is performed in accordance with the operation of the controller C.
The rotation control means 44 has a function of controlling a second drive source (not shown), which is one of the holding unit drive sources 24, so that the rotation direction of the rotating body 23c of the traverse means 2 is in accordance with the operation of the controller C.

<Power supply unit>
The power supply unit 5 shown in FIG. 1 is an equipment unit that supplies power to the electric drive source and the control device 4 , and is supported by the support frame 1 .
The power supply unit 5 includes a base 51 attached to the ends of the support rails 11 , 11 , and a generator placed on the base 51 .
The base 51 is attached to the rear end of the second gantry unit 1B (the rear end of the preparation-side rail portion 11B) and protrudes rearward in a cantilever fashion from the rear end of the gantry unit 1B.
There are no restrictions on the destinations of the power supply from the generator 52, but in this embodiment, power is supplied to the driving sources of the traverse means 2 (cart driving source 22, holding section driving source 24), the driving sources of the suspension means 3 (cart driving source 32, frame driving source 34), the load cell 37, the control device 4, etc., via power cables not shown.
In the process of relocating the transport device 100, when the support stand 1 is put into the movable mode (see FIG. 8(c)) (when the transport device 100 is made to stand on its own using only the second support leg 16), the power supply unit 5 serves as a counterweight. If the weight of the base 51 and the power supply unit 52 alone cannot be balanced, a weight member (not shown) may be mounted on the base 51.

<Hanging jig>
As shown in FIG. 1 , the lifting jig 8 is a jig for transporting the deck 7 and has a mechanism that can be engaged with the traverse means 2 and the lifting means 3 .
4, the hanging jig 8 has a first hooking portion 86 to which the sling 35 can be hooked, and a second hooking portion 87 to which the holding portion 23 of the traverse means 2 can be hooked. In other words, the hanging jig 8 separately has the first hooking portion 86 to which the sling 35 can be hooked, and the second hooking portion 87 to which the holding portion 23 of the traverse means 2 can be hooked.
By attaching such a lifting jig 8 to the deck 7, the object to be transported (the deck 7 with the lifting jig 8 attached) lifted by the sling 35 can be transferred to the traverse means 2, or the object to be transported held by the traverse means 2 can be transferred to the lifting means 3.

In addition to a first hook portion 86 and a second hook portion 87 , the hanging jig 8 of this embodiment also includes a base 81 that is attached to the deck slab 7 , and a column portion 85 that is located in the center of the base 81 .
Furthermore, the hanging jig 8 of this embodiment includes a reinforcing portion 82 that reinforces the base 81, a load distribution portion 83 that connects the base 81 and the reinforcing portion 82, and a leg portion 84 that connects the load distribution portion 83 and the column portion 85.

The base 81 is formed by combining multiple steel materials (H-shaped steel, I-shaped steel, channel steel, etc.) and has a rectangular frame shape that is smaller than the outer shape of the deck slab 7.
The reinforcing portion 82 is made of steel and is arranged to connect two opposing steel materials out of the four steel materials that make up the base 81. An end of the reinforcing portion 82 is joined to the base 81. There is no restriction on the orientation of the reinforcing portion 82, but the reinforcing portion 82 in this embodiment is arranged along the longitudinal direction of the base 81. There is also no restriction on the number of reinforcing portions 82, but in this embodiment, two reinforcing portions 82, 82 are arranged side by side with a gap between them in the short direction of the base 81. The two reinforcing portions 82, 82 face each other with the column portion 85 in between.
The load distribution portion 83 is made of steel (such as a steel bar) arranged in a direction intersecting with the reinforcing portion 82, and penetrates two of the four steel materials constituting the base 81 that are parallel to the reinforcing portion 82 and the reinforcing portions 82, 82. That is, the load distribution portion 83 is arranged along the short side direction of the base 81. There is no limit to the number of load distribution portions 83, but in this embodiment, two load distribution portions 83, 83 are arranged side by side with a gap between them in the longitudinal direction of the base 81. The load distribution portions 83, 83 face each other with the column portion 85 in between.
The leg portion 84 is made of a steel material (e.g., a steel plate) that protrudes from the lower portion of the column portion 85 toward the load distribution portion 83. The load distribution portion 83 penetrates the leg portion 84.
The pillar portion 85 is made of a steel material (such as a steel pipe) placed in the center of the base portion 81, and is connected to the base portion 81 via a reinforcing portion 82, a load dispersing portion 83, and a leg portion 84. The pillar portion 85 extends upward from the base portion 81, and is inserted into the opening portion 23e when the hanging jig 8 is raised toward the holding portion 23 of the traverse means 2.

The first hook 86 is formed on the upper part of the column 85. In this embodiment, the first hook 86 is made of a pair of hook plates joined to the upper part of the column 85. The pair of hook plates rise upward from the upper part of the column 85 and face each other with a gap between them. In this embodiment, the upper parts of the pair of hook plates that make up the first hook 86 are each in an inverted J shape, and the pair of hook plates are arranged in opposite directions, corresponding to the fact that a horizontal rod-shaped hook is formed on the lower end of the sling 35. Note that if a J-shaped hook is formed on the lower end of the sling 35, a ring-shaped hook may be used as the first hook 86.

The second hook 87 is formed at the bottom of the column 85. In this embodiment, the second hook 87 is made of a circular hook plate joined to the bottom of the column 85. The hook plate is arranged parallel to the base 81. A pair of hook holes 87a are formed in the hook plate. The hook hole 87a is a long hole formed along the circumferential direction of a virtual circle centered on the central axis of the column 85. The opening width on one end side of the hook hole 87a is set to a size that allows the hook portion 23d of the holding portion 23 of the traverse means 2 to be inserted, and the opening width on the other end side of the hook hole 87a is narrower than the one end side. When the hook portion 23d is inserted into one end side of the hook hole 87a, the rotating body 23c of the holding portion 23 is rotated and the hook portion 23d is moved to the other end side of the hook hole 87a, the hook portion 23d hooks onto the periphery of the hook hole 87a.

By arranging a pillar portion 85 in the center of the base portion 81, and further arranging a first hooking portion 86 at the upper part of the pillar portion 85 and a second hooking portion 87 at the lower part of the pillar portion 85, when the hanging jig 8 is viewed in a plane, the first hooking portion 86 and the second hooking portion 87 will be located at or near the center of gravity of the base portion 81, making it easier to stabilize the posture of the hanging jig 8.
In addition, by interposing the reinforcement portion 82, the load distribution portion 83, and the legs 84 between the base 81 and the column portion 85, when the hanging jig 8 is used to hang or hold a load, the force acting on the column portion 85 can be suitably distributed to the base 81 and the reinforcement portion 82, making it less likely that the hanging jig 8 will undergo significant deformation.

There are no limitations on the method for attaching the hanging jig 8 to the deck 7, but it is preferable to fasten the hanging jig 8 to a PC steel bar that penetrates the deck 7, an anchor bolt that is planted in the deck 7, or a bolt that is screwed into an insert nut of the deck 7.

<Examples of use of conveyor equipment>
When the transport device 100 is used, an object to be transported can be lifted by the lifting means 3, and the lifted object can be handed over to the traverse means 2, after which the traverse means 2 can move the object traversely.
Furthermore, the transport device 100 can determine whether the object to be transported is suspended from the sling 35 (loaded state), and when it is determined that the object is in a loaded state, it goes into a state where it prevents the traverse means 2 and the hoisting means 3 from traversing. In other words, by using the transport device 100, it is possible to comply with the work procedure of not allowing the object to be transported to traverse while suspended from the sling 35. Incidentally, the transport device 100, which is equipped with a mechanism that prevents the object to be transported suspended from a sling from traversing, does not qualify as a crane under the Safety Regulations for Cranes, etc.
As an example of use of the conveying device 100, a deck replacement method for replacing an existing deck on a bridge with a new deck will be described below.
As shown in FIG. 1, the transport device 100 used in the deck replacement method is installed in a work area A (the area marked with a dot in FIG. 1) and a preparation area B.
The deck replacement method of this embodiment includes a deck removal process in which the existing deck slab 7 is moved to a predetermined destination (preparation area B) by a deck moving method using the conveying device 100, and a deck installation process in which a newly constructed deck slab (not shown) that has been transported to the destination of the deck slab 7 is moved to the source of the deck slab 7 (work area A) by a deck moving method using the conveying device 100.

6 and 7 are perspective views showing a deck removal process in which an existing deck is moved to a destination by a deck moving method using the transport device 100. FIG.
In the deck removal process, as shown in Figures 6(a) and (b), the object to be transported (the existing deck slab 7 with a hanging jig 8 attached) is lifted by the lifting means 3 in the work area A, and the object to be transported is handed over to the traverse means 2 above the work area A. After that, as shown in Figures 6(c) and 7(a), the object to be transported is traversed by the traverse means 2 to above the preparation area B.
In addition, in the deck removal process, as shown in Figure 7, the empty lifting means 3 is sent to above the traverse means 2, and the transported object is handed over from the traverse means 2 to the lifting means 3 above the preparation area B, and then the lifting means 3 lowers the transported object to the loading platform 61 of the transport vehicle 6.

The deck moving method according to this embodiment will be described in more detail below, using the deck removal process as an example.
The deck moving method according to this embodiment includes a lifting preparation step (FIG. 6(a)), a lifting step and a traverse preparation step (FIG. 6(b)), a traverse step (FIG. 6(c)), a transfer step and a suspension preparation step (FIG. 7(a)), and a suspension step (FIG. 7(b)). In the following explanation, the specific configurations of the traverse means 2, the suspension means 3, and the suspension jig 8, which are not shown in FIG. 6 and FIG. 7, will be explained with reference to FIG. 4.

The lifting preparation process is a process carried out before lifting the transported object. The lifting preparation process includes a jig transporting operation, a jig changing operation, a jig lowering operation, a jig fixing operation, a sling connecting operation, etc. Fig. 6(a) shows the state where the lifting preparation process is completed.
The jig transport operation is an operation of moving the lifting jig 8, which is the object to be transported in the lifting preparation process, to above the deck 7 using the traverse means 2. The lifting jig 8 is held by the holding portion 23 of the traverse means 2. During the jig transport operation, the sling 35 of the lifting means 3 is in a non-suspended state where no tensile force is applied (determined to be in a non-suspended state by the determination means 41 shown in FIG. 5), so that the movement (transverse movement) of the traverse means 2 and the lifting means 3 is permitted. After the traverse means 2 is moved in the front-rear direction to move the lifting jig 8 to above the deck 7 to be removed, the holding portion 23 of the traverse means 2 is moved in the left-right direction to adjust the position of the lifting jig 8 so that the column portion 85 of the lifting jig 8 (the center of gravity of the lifting jig 8) coincides with the vertical line passing through the center of gravity of the deck 7. Once the position adjustment of the hanging jig 8 is complete, the hanging means 3 is moved laterally in the forward/backward direction and the support frame 33 is moved laterally in the left/right direction, and the position of the hanging means 3 is adjusted so that the center of the holding portion 23 of the traversing means 2 and the sling 35 are aligned.

The jig changing operation is an operation of transferring the hanging jig 8 held by the traverse means 2 to the hanging means 3. In the jig changing operation, the lower end of the sling 35 is hooked onto the first hook portion 86 of the hanging jig 8, and the weight of the hanging jig 8 is applied to the sling 35, and then the rotating body 23c of the traverse means 2 is rotated to release the hooked state between the hook portion 23d and the second hook portion 87 of the hanging jig 8.
The jig lowering operation is an operation of lowering the hanging jig 8 suspended from the sling 35 to the deck 7. The jig lowering operation is performed by operating the feed-out portion 36 of the hanging means 3. After the hanging jig 8 is placed on the deck slab 7, the lower end portion of the sling 35 is removed from the first engaging portion 86 of the hanging jig 8.
The jig fixing work is work for fixing the lifting jig 8 to the deck slab 7. The jig fixing work is performed, for example, by fastening a fastening part such as a PC steel bar that penetrates the deck slab 7 to the lifting jig 8.
The sling connecting work is a work of connecting the sling 35 to the transported object (the deck slab 7 to which the lifting jig 8 is attached). In the sling connecting work, the lower end of the sling 35 is engaged with the first engaging portion 86 of the lifting jig 8.
In addition, if the lower end of the sling 35 is not removed from the first engaging portion 86 of the hanging jig 8 after the jig lowering operation is completed, the sling connection operation is also completed by performing the jig fixing operation.

As shown in Fig. 6(b), the lifting process is a process of lifting the transported object (the deck slab 7 with the lifting jig 8 attached) using the lifting means 3. The lifting process is performed by operating the output part 36 of the lifting means 3. Specifically, the rod of the linear actuator 36d of the output part 36 is advanced to move the slide part 36b forward.
Furthermore, since the position of the first engaging portion 86 of the lifting jig 8 is aligned with the center of gravity of the transported object, the posture of the transported object can be stabilized during the lifting process.
Once the object to be transported has been raised to below the holding portion 23 of the lateral movement means 2, the pillar portion 85 of the hanging jig 8 is inserted into the opening 23e of the holding portion 23 while the object to be transported is further raised and the hanging portions 23d, 23d of the lateral movement means 2 are inserted into one end side of the hanging holes 87a, 87a of the hanging jig 8.
During the lifting process, a tensile force acts on the sling 35 of the lifting means 3, resulting in a suspended state (the suspension state is determined by the determination means 41), and therefore movement (lateral movement) of the traverse means 2 and the lifting means 3 is prevented.

The lateral travel preparation step is a step of having the lateral travel means 2 hold the transport object, and transferring the transport object suspended by the suspension means 3 to the lateral travel means 2. In the lateral travel preparation step, the rotating body 23c of the lateral travel means 2 is rotated approximately 90 degrees to cause the hooking portion 23d to hook onto the second hooking portion 87 of the suspension jig 8, and then the lower end portion of the sling 35 is removed from the first hooking portion 86 of the suspension jig 8. In this embodiment, the pillar portion 85 of the suspension jig 8 fits into the center portion of the holding portion 23 of the lateral travel means 2, and the holding portion 23 and the sling 35 are arranged coaxially, so that when the transport object is transferred from the hanging means 3 to the lateral travel means 2, the posture of the transport object can be easily maintained.
Furthermore, when the engagement between the lower end of the sling 35 and the first engagement portion 86 of the hanging jig 8 is released, the weight of the object to be transported acts on the traverse means 2, and the sling 35 of the hanging means 3 enters a non-suspended state in which no tensile force acts on it (this is determined to be a non-suspended state by the judgment means 41), and therefore movement (traverse) of the traverse means 2 and the hanging means 3 is permitted after the traverse preparation process.

6(c), the lateral travel step is a step of moving the lateral travel means 2 in the front-rear direction. In the lateral travel step, the lateral travel cart 21 travels along the support rails 11 to move the transported object from above the work area A to above the preparation area B.
After the lateral travel preparation step is completed, a rotation step may be performed to change the orientation of the transport object before the lateral travel step is started, or during the lateral travel step. As shown in Fig. 6C, in this embodiment, the longitudinal dimension of the transport object is greater than the distance between the main supports 12b, 12b adjacent to each other on the left and right, so that the transport object is rotated 90 degrees during the lateral travel step so that the short side direction of the transport object is the left-right direction. The rotation step is performed by rotating the rotating body 23c of the lateral travel means 2.

As shown in FIG. 7(a), the forwarding process is a process of moving the unladen lifting means 3 above the destination of the transported object (preparation area B in FIG. 7(a)). In the forwarding process, the lifting cart 31 runs along the support rails 11. In this embodiment, the forwarding process is performed after the lateral travel process is completed, but as long as the lateral travel preparation process is completed (i.e., when in a non-suspended state), the forwarding process may be performed before the lateral travel process or simultaneously with the lateral travel process.
If the hoisting means 3 is sent to the destination of the traverse means 2, the hoisting means 3 can also be used when lowering the transport object held by the traverse means 2.

The suspension preparation process is a process in which the sling 35 of the suspension means 3 is connected to the transport object above the destination of the transport object, and the transport object held by the traverse means 2 is handed over to the suspension means 3. In the suspension preparation process, the lower end of the sling 35 is engaged with the first engagement portion 86 of the suspension jig 8, and the weight of the transport object is applied to the sling 35. Then, the rotating body 23c of the traverse means 2 is rotated to release the engagement between the engagement portion 23d and the second engagement portion 87 of the suspension jig 8.

7(b), the hanging process is a process of lowering the transport object using the hanging means 3. In the hanging process of this embodiment, the transport object hung from the sling 35 is lowered to the loading platform 61 of the transport vehicle 6. The hanging process is performed by operating the delivery section 36 of the hanging means 3.
Once the object to be transported has been placed on the loading platform 61, the hoisting jig 8 is removed from the deck 7 and raised using the hoisting means 3.
Once the hanging process is completed, the transport vehicle 6 transports the deck 7 from the preparation area B to outside the work site.

If the deck installation process is to be carried out subsequently to the deck removal process, the new deck is transported to the preparation area B by the transport vehicle 6, and then moved to the work area A by reversing the steps of the deck removal process.
That is, in the deck installation process, the object to be transported (a newly constructed deck with a hanging jig 8 attached) placed on the loading platform 61 is lifted by the lifting means 3, and the object to be transported is handed over from the lifting means 3 to the traverse means 2 above the preparation area B, and then the object to be transported is traversed by the traverse means 2 to above the work area A.
Furthermore, in the deck installation process, the empty lifting means 3 is transported above the traverse means 2, and the transported object is handed over from the traverse means 2 to the lifting means 3 above the work area A, and then the lifting means 3 lowers the transported object to the work area A.

If the lifting means 3 were configured so that it could not move along the support rail 11, it would be necessary to move the entire transport device 100 each time the position of the transport object changed. However, the lifting means 3 of this embodiment can move along the support rail 11 when unladen. Therefore, even when multiple transport objects lined up in the longitudinal direction of the support rail 11 are to be moved sequentially, there is no need to move the entire support frame 1 each time, allowing for efficient operation.

<Method of moving the conveying device>
When the deck replacement work in the work area A is completed, the transport device 100 is moved. Figures 8 and 9 are diagrams for explaining a method of moving the transport device 100.
The method for moving the transport device of this embodiment includes a first mode change step (FIG. 8) for changing the mode of the support pedestal 1 from the fixed mode to the movable mode, a self-propelling step for self-propelling the transport device 100, and a second mode change step (FIG. 9) for changing the mode of the support pedestal 1 from the movable mode to the fixed mode. Note that the fixed mode is a mode in which the support body 12 is in contact with the floor slab, and the movable mode is a mode in which only the traveling means 14 is in contact with the floor slab.

The first mode changing step includes a first center-of-gravity shifting operation (FIG. 8(a)), a second center-of-gravity shifting operation (FIG. 8(b)), and a switching operation (FIG. 8(c)).
8(a), the first center-of-gravity moving operation is an operation of moving the traverse means 2 holding the hoisting jig 8 to the rear part (second pedestal unit 1B) of the support pedestal 1 and moving the hoisting means 3 to the rear part (second pedestal unit 1B) of the support pedestal 1. That is, the first center-of-gravity moving operation is an operation of consolidating the equipment units (traverse means 2, hoisting means 3, power supply unit 5) and the hoisting jig 8 mounted on the support pedestal 1 into the second pedestal unit 1B and moving the center of gravity position of the transport device 100 into the pedestal unit 1B.
8(b), the second center-of-gravity moving operation is an operation of lowering the support rails 11, 11 of the support cradle 1. That is, the second center-of-gravity moving operation is an operation of lowering the equipment units (the traverse means 2, the hoisting means 3, the power supply unit 5) and the hoisting jig 8 mounted on the support cradle 1 together with the support rails 11, 11, and moving the center-of-gravity position of the transport device 100 downward. In this embodiment, the length adjustment mechanism (linear actuator) of the main pillar 12b of the support body 12 is operated to shorten the main pillar 12b, thereby lowering the support rails 11, 11.
As shown in Fig. 8(c), the transfer operation is an operation of transferring the weight of the transport device 100 from the support 12 to the traveling means 14. In this embodiment, the length adjustment mechanism (linear actuator) of the auxiliary support 16c of the second support leg 16 is operated to extend the auxiliary support 16c, thereby transferring the weight of the transport device 100 from the support 12 to the traveling means 14. When the traveling means 14 touches the floor slab (traveling surface), the auxiliary support 16c is further extended to make the support 12 suspended in the air. When the transfer operation is completed, the configuration of the support stand 1 switches to the movable mode, and the transport device 100 is supported only by the four traveling means 14 arranged in the preparation area B.

The self-propelled process is a process in which the transport device 100 is self-propelled to the relocation destination, as shown in FIG. 9(a). When the support frame 1 is in the movable mode, the transport device 100 is supported by the second frame unit 1B equipped with the traveling means 14, and the first frame unit 1A is suspended above the floor slab. Therefore, by self-propelling the transport device 100 toward the preparation area B side (the right side in FIG. 8 and FIG. 9), the transport device 100 can be relocated without traveling through the work area A.

9B, the second mode change process is a process of returning the configuration of the support cradle 1 to the fixed mode. The second mode change process includes a process of transferring the weight of the transport device 100 from the traveling means 14 to the support body 12, and a process of lifting the equipment unit (the traverse means 2, the hoisting means 3, the power supply unit 5) and the hoisting jig 8 mounted on the support cradle 1 together with the support rails 11, 11.
In this embodiment, by shortening the auxiliary support 16c, the weight of the transport device 100 is transferred from the traveling means 14 to the support body 12, and by extending the main support 12b, the support rails 11, 11 are raised together with the equipment unit.
When the second mode change step is completed, the configuration of the support cradle 1 is switched to the fixed mode, and the transport device 100 is supported by the supports 12 .

In this way, according to the method for moving the conveying device of this embodiment, the conveying device 100 can be relocated without traveling through the work area A, so that the work of laying steel plates on the newly constructed deck (work to protect the newly constructed deck) can be omitted or simplified.
In addition, since the support body 12 is provided with a main support pillar 12b whose length is adjustable, and the second support leg 16 is provided with an auxiliary support pillar 16c whose length is adjustable, it is easy to switch between the fixed mode and the movable mode.

<How to load and unload the transport device>
As shown in Figs. 10 and 11, the transport device 100 is divided into units that can be loaded onto a transport vehicle 6 and are transported to or from the work site.
10 is a diagram showing a state in which the first gantry unit 1A constituting the transport device 100 is loaded onto the transport vehicle 6, (a) being a plan view and (b) being a side view. Fig. 11 is a diagram showing a state in which the second gantry unit 1B constituting the transport device 100 is loaded onto the transport vehicle 6, (a) being a plan view and (b) being a side view.
In this embodiment, the support cradle 1 is divided into a first cradle unit 1A and a second cradle unit 1B, which are loaded onto a transport vehicle 6. Although not shown, the equipment units (the traverse means 2, the hoisting means 3, the power supply unit 5, etc.) are removed from the support cradle 1 and loaded onto a transport vehicle 6 separate from the cradle units 1A and 1B.

10(a), when loading the gantry unit 1A onto the loading platform 61 of the transport vehicle 6, the cross beam 13 is shortened to make the width dimension of the gantry unit 1A smaller than the vehicle width of the transport vehicle 6. Also, as shown in Fig. 10(b), the main support pillars 12b of the support body 12 are shortened, and the auxiliary support pillars 17b of the transport support legs 17 are switched to a state along the vertical direction, so that the gantry unit 1A is made to stand on the loading platform 61 by the support body 12 and the transport support legs 17.
11(a), when loading the gantry unit 1B onto the loading platform 61, the front and rear cross beams 13, 13 are shortened to make the width dimension of the gantry unit 1B smaller than the vehicle width of the transport vehicle 6. Also, as shown in FIG. 11(b), after shortening the main pillars 12b of the support body 12, the gantry unit 1B is made to stand on the loading platform 61 by the four supports 12, 12, ....

As described above, the mounting units 1A and 1B can stand on their own on the loading platform 61 of the transport vehicle 6, so there is no need to install a transport platform (a platform that supports the mounting units 1A and 1B) on the loading platform 61 when transporting the mounting units 1A and 1B.

<Method of assembling the conveying device>
The transport apparatus 100 can be assembled without the use of a crane.
A method of assembling the conveying device 100 will be described below with reference to Figures 12 to 16. Figures 12 to 16 are diagrams for explaining the method of assembling the conveying device 100.
The assembly method of this embodiment includes a stand installation process (Figures 12 to 14, Figures 15(a) and (b)) for assembling the support stand 1, and an equipment assembly process (Figures 15(c) and 16) for mounting an equipment unit on the support stand 1.

The gantry installation process includes a first temporary placement operation (FIGS. 12 and 13) for temporarily placing the first gantry unit 1A and a second temporary placement operation (FIG. 14) for temporarily placing the second gantry unit 1B as a process for transporting the gantry units 1A and 1B to the work site. The gantry installation process also includes a connection operation (FIG. 15(a)) for connecting the gantry units 1A and 1B and a widening operation (FIG. 15(b)) for widening the connected gantry units 1A and 1B as a process for assembling the support gantry 1.

12(a), in the first temporary placement work, the first gantry unit 1A loaded on the loading platform 61 of the transport vehicle 6 is first carried into the work site. The gantry unit 1A is transported in a state in which it stands on the loading platform 61. The gantry unit 1A is provided with two permanent supports 12, but since it is provided with two transport support legs 17, 17 in addition to the supports 12, it can be transported in the same position as after assembly.
12(b), the loading support leg (first support leg 15) stored in the pedestal unit 1A is changed to a configuration for use. Specifically, the extension portion 15b stored in the bracket 15a (see FIG. 1) is pulled out, and the auxiliary support column 15c is rotated around the horizontal axis at the end of the extension portion 15b so that the auxiliary support column 15c is aligned vertically.
12(c), the auxiliary support 15c is extended, and when the lower end of the auxiliary support 15c touches the floor slab (the running surface of the transport vehicle 6), the auxiliary support 15c is further extended to raise the gantry unit 1A above the loading platform 61. In other words, the gantry unit 1A is made to stand independently on the floor slab by the loading support leg (first support leg 15) provided on the gantry unit 1A.
Once the gantry unit 1A has been lifted off the platform 61, the transport vehicle 6 is moved (see FIG. 13(a)).
Next, as shown in FIG. 13(b), the auxiliary support 15c of the first support leg 15 is contracted to bring the support body 12 and the transportation support leg 17 into contact with the floor slab.
13(c), the auxiliary columns 15c of the first support legs 15 are then changed to their stored configuration (along the support rails 11), and the gantry unit 1A is made to stand on the floor slab by the supports 12 and the transport support legs 17. The gantry unit 1A is provided with two permanent supports 12, but since it is provided with two transport support legs 17, 17 in addition to the supports 12, it can be temporarily placed in the same position as after assembly.

14A, in the second temporary placement work, first, the second gantry unit 1B loaded on the loading platform 61 of the transport vehicle 6 is carried into the work site. The gantry unit 1B is supported by the supports 12 on the loading platform 61.
14B, the loading support leg (second support leg 16) stored in the second gantry unit 1B is changed to a configuration for use. Specifically, the extension portion 16b stored in the bracket 16a (see FIG. 1) is pulled out.
14(c), the auxiliary support 16c is extended, and when the traveling means 14 touches the floor slab (traveling surface), the auxiliary support 16c is further extended to raise the second gantry unit 1B above the loading platform 61. In other words, the loading support legs (second support legs 16) provided on the gantry unit 1B allow the gantry unit 1B to stand independently on the floor slab. Once the gantry unit 1B is raised above the loading platform 61, the transport vehicle 6 is moved.
Next, as shown in FIG. 15(a), the second mounting unit 1B is self-propelled by the running means 14 to a position adjacent to the first mounting unit 1A, and further, the auxiliary support 16c of the second support leg 16 is retracted to adjust the height of the second mounting unit 1B to the height of the first mounting unit 1A.
In addition, the second platform unit 1B equipped with a running means 14 can be moved to any position on the deck (the running surface of the transport vehicle 6). For example, it may be unloaded from the transport vehicle 6 at a location away from the first platform unit 1A and then moved to a position adjacent to the platform unit 1A.

In the connection work, the work side rail parts 11A, 11A (see FIG. 1) of the gantry unit 1A and the preparation side rail parts 11B, 11B (see FIG. 1) of the gantry unit 1B are connected to form the support gantry 1. In addition, the auxiliary support pillars 17b of the transport support legs 17 of the gantry unit 1A are changed to a stored configuration (a state along the support rails 11).
In the widening operation, first, the main support 12b of the support 12 is extended to raise the support frame 1 above the floor slab. Then, as shown in FIG. 15(b), the direction of the traveling means 14 is changed to a direction perpendicular to the support rail 11 (left-right direction). Next, the main support 12b of the support 12 is shortened, or the auxiliary support 16c of the second support leg 16 is extended to bring the traveling means 14 into contact with the floor slab. When the traveling means 14 is in contact with the floor slab, the auxiliary support 16c is further extended to raise the support 12 above the floor slab, and the configuration of the support frame 1 is switched to the movable mode. Then, the traveling means 14 is caused to travel in the left-right direction to widen the gap between the support rails 11, 11, and extend the cross beam 13. If the configuration of the support frame 1 is changed to the movable mode, the support frame 1 is supported by the traveling means 14, so that the gap between the support rails 11, 11 can be smoothly adjusted.
When the widening work is completed, the auxiliary support 16c of the second support leg 16 is shortened or the main support 12b of the support 12 is extended, so that the support frame 1 stands on the floor slab by the support 12 and the traveling means 14 is raised above the floor slab. After that, the direction of the traveling means 14 is changed to the direction along the support rail 11 (front-rear direction).

In this way, the support frame 1 can change the spacing between the support rails 11, 11 by adjusting the length of the cross beam 13. Therefore, as shown in Figures 10 and 11, when loading the frame units 1A, 1B onto the loading platform 61 of the transport vehicle 6, a compact form that fits within the vehicle width can be selected by shortening the cross beam 13 and narrowing the spacing between the work side rail sections 11A, 11A or the preparation side rail sections 11B, 11B. On the other hand, when sharing the transport device 100, the stability of the support frame 1 can be increased by extending the cross beam 13 and widening the spacing between the support rails 11, 11, as shown in Figure 2.

The equipment assembly process is a process of assembling the conveying device 100 using the support frame 1 and the transport vehicle 6 with the equipment unit loaded on the loading platform 61.
The equipment assembly process of this embodiment includes a first installation operation (FIG. 15(c)) of installing the lifting means 3 on the support stand 1, a second installation operation (FIG. 16(a)) of installing the traverse means 2 on the support stand 1, and a third installation operation (FIG. 16(b)) of installing the power supply unit 5 on the support stand 1.
The equipment units (the traverse means 2, the hoisting means 3, and the power supply unit 5) and the hoisting jig 8 to be mounted on the support frame 1 are preferably arranged in the order of operation and loaded onto the loading platform 61 of the transport vehicle 6. In this embodiment, the hoisting means 3, the traverse means 2, the hoisting jig 8, and the power supply unit 5 are arranged in this order from the rear to the front of the loading platform 61.

In the first installation work, first, the rear end of the platform 61 of the transport vehicle 6 carrying the hoisting means 3 is inserted into the internal space of the support frame 1 (vehicle entry process). Next, the height of the support frame 1 (height of the support rail 11) is adjusted to match the height of the hoisting means 3 on the platform 61 (height adjustment process). Specifically, the height of the upper rail 11b of the support rail 11 (see FIG. 3(b)) is adjusted to match the height of the drive wheel 31a and the driven wheel 31b of the hoisting means 3 (see FIG. 4). Then, the hoisting means 3 is attached to the support frame 1 (attachment process). In this embodiment, the hoisting means 3 on the platform 61 is moved forward and the hoisting means 3 is placed on the upper rail 11b of the support rail 11, thereby attaching the hoisting means 3 to the support frame 1. The hoisting means 3 may be placed on the support rail 11 by moving the transport vehicle 6 backward (moving the platform 61 forward of the support frame 1).

In the second installation work, as shown in FIG. 16(a), the main support 12b of the support body 12 is extended, and the support rails 11, 11 are raised. Next, the transport vehicle 6 loaded with the traverse means 2 is moved backward (the loading platform 61 is moved forward of the support frame 1), and the loading platform 61 is made to enter the internal space of the support frame 1 (vehicle entry process). Next, the height of the support frame 1 (the height of the support rail 11) is adjusted to match the height of the traverse means 2 on the loading platform 61 (height adjustment process). Specifically, the height of the lower rail 11c of the support rail 11 (see FIG. 3(b)) is adjusted to the height of the driving wheel 21a and the driven wheel 21b of the traverse means 2 (see FIG. 4). Then, the traverse means 2 is attached to the support frame 1 (attachment process). In this embodiment, the traverse means 2 on the loading platform 61 is moved forward, and the traverse means 2 is placed on the lower rail 11c of the support rail 11, thereby attaching the traverse means 2 to the support frame 1. In addition, the traverse means 2 may be caused to move onto the support rails 11 by moving the transport vehicle 6 backward (moving the loading platform 61 forward of the support frame 1).
After the traverse means 2 is attached to the support frame 1, the main pillars 12b of the support body 12 are extended, and the support rails 11, 11 are raised. Then, the transport vehicle 6 loaded with the hoisting jig 8 is moved backward, and the loading platform 61 is advanced into the internal space of the support frame 1 (vehicle advancement process). Specifically, the second engagement portion 87 (see FIG. 4) of the hoisting jig 8 is positioned directly below the holding portion 23 (see FIG. 4) of the traverse means 2. Next, the height of the support frame 1 (the height of the support rail 11) is adjusted to match the height of the hoisting jig 8 on the loading platform 61 (height adjustment process). Specifically, the main pillars 12b of the support body 12 are contracted, and the traverse means 2 is lowered together with the support rails 11, 11, and the second engagement portion 87 of the hoisting jig 8 is engaged with the engagement portion 23d (see FIG. 4) of the holding portion 23 while the pillar portion 85 (see FIG. 4) is inserted into the holding portion 23 (see FIG. 4) of the traverse means 2. After the hanging jig 8 is held by the traverse means 2, the traverse means 2 is moved forward of the loading platform 61.

In the third installation operation, as shown in Fig. 16(b), the transport vehicle 6 loaded with the power supply unit 5 is driven backward (the loading platform 61 is moved forward of the support frame 1) and the loading platform 61 is advanced into the internal space of the support frame 1 (vehicle advancement step). Next, the height of the support frame 1 (height of the support rail 11) is adjusted to match the height of the power supply unit 5 on the loading platform 61 (height adjustment step). Specifically, the main pillar 12b of the support body 12 is contracted and the support rails 11, 11 are lowered. Once the power supply unit 5 is positioned at the end of the support rail 11, the power supply unit 5 is attached to the support frame 1 (attachment step).
Thereafter, the transport vehicle 6 is moved, and the main pillars 12b of the support body 12 are extended as shown in FIG. 16(c), thereby obtaining a transport device 100 capable of transporting the deck slab in and out.

As described above, in the equipment assembly process, the equipment unit can be brought close to the support frame 1 with the height of the support frame 1 adjusted to the height of the equipment unit (traverse means 2, lifting means 3, and power supply unit 5) loaded on the loading platform 61, so that the equipment unit can be attached to the support frame 1 without having to be hoisted by a crane.

<Method of dismantling the transport device>
The transport apparatus 100 can be dismantled (disassembled) without the use of a crane.
Although not shown in the drawings, the method of disassembling the conveying device 100 is performed in the reverse order to the assembly method. The state during disassembly is similar to the state during assembly shown in FIGS.
That is, the dismantling method of this embodiment includes an equipment dismantling step of removing the equipment units from the support frame 1, and a frame dismantling step of dismantling the support frame 1.

The equipment disassembly process is a process of removing the equipment unit (traverse means 2, lifting means 3 and power supply unit 5) from the conveying device 100 using the support stand 1 and transport vehicle 6, and includes a vehicle entry process, a height adjustment process, and a removal process.
In the vehicle entry process, at least a portion of the loading platform 61 of the transport vehicle 6 is entered into the internal space of the support frame 1 .
In the height adjustment process, the height of the support frame 1 (i.e., the height of the support rails 11 ) is adjusted to match the height of the equipment unit on the support frame 1 with the height of the loading platform 61 .
In the removal process, the equipment unit that matches the height of the loading platform 61 is removed from the support stand 1.
According to such a procedure, the equipment unit can be brought close to the loading platform 61 while the height of the equipment unit is adjusted to the height of the loading platform 61, so that the equipment unit removed from the support stand 1 can be loaded onto the loading platform 61 without having to be hoisted by a crane.

The gantry disassembly process includes a width reduction operation for narrowing the width of the support gantry 1, a separation operation for disconnecting the gantry units 1A and 1B, and a loading operation for loading the gantry units 1A and 1B onto the loading platform 61 of the transport vehicle 6.
In the width reduction operation, the configuration of the support stand 1 is switched to the movable mode, and the gap between the support rails 11, 11 is narrowed.
In the loading operation of the first gantry unit 1A, the loading support legs (first support legs 15, 15) are lowered from the gantry unit 1A onto the floor slab (the running surface of the transport vehicle 6), and the gantry unit 1A is raised by the loading support legs erected on the floor slab. When the height of the lower end of the support body 12 exceeds the height of the upper surface of the loading platform 61, the loading platform 61 of the transport vehicle 6 is advanced into the internal space of the gantry unit 1A. Thereafter, the gantry unit 1A is lowered by the loading support legs, and the gantry unit 1A can be placed on the loading platform 61.
In the loading operation of the second gantry unit 1B, the loading support legs (second support legs 16, 16) are lowered from the gantry unit 1B onto the floor slab (the running surface of the transport vehicle 6), and the gantry unit 1B is raised by the loading support legs erected on the floor slab. When the height of the lower end of the support body 12 exceeds the height of the upper surface of the loading platform 61, the loading platform 61 of the transport vehicle 6 is advanced into the internal space of the gantry unit 1B. Thereafter, the gantry unit 1B is lowered by the loading support legs, and the gantry unit 1B can be placed on the loading platform 61.

<Function and effect of the conveying device>
The conveying device 100 does not simply move the object to be conveyed suspended from the sling 35 of the suspending means 3 laterally, but delivers the object to be conveyed suspended from the suspending means 3 to the traversing means 2, and then causes the object to be conveyed to move laterally by the traversing means 2. The conveying device 100 provides the following operational effects.
(1) It is possible to comply with the work procedure of not moving the transport vehicle sideways when the object to be transported is suspended.
(2) Since the support rails 11 are supported by the supports 12 erected in the work area A and the supports 12 erected in the preparation area B, the length of the support rails 11 (i.e., the distance that the transported object can move laterally) can be increased by appropriately setting the number and spacing of the supports 12. In addition, when the transport device 100 (support stand 1) is in the movable mode, the transport device 100 is supported by the traveling means 14 arranged in the preparation area B, so that the transport device 100 can be relocated without traveling through the work area A.
(3) It is possible to load the rack units 1A, 1B onto the loading platform 61 or unload the rack units 1A, 1B from the loading platform 61 without using a crane.
(4) The equipment unit can be attached to and detached from the support frame 1 without using a crane.
(5) The specifications and layout of the conveying device 100 can be easily changed depending on the construction conditions.
(6) It is possible to improve stability when transporting objects laterally.
(7) Since the object to be transported can be moved laterally without being suspended by the sling 35, large shaking during lateral movement can be suppressed compared to when the object is moved laterally while still suspended by the sling 35.
(8) By using the hanging jig 8, the work of transferring the transported object between the traverse means 2 and the hanging means 3 can be performed efficiently.

100 Conveying equipment (construction equipment)
REFERENCE SIGNS LIST 1 Support stand 1A Stand unit 1B Stand unit 11 Support rail 11A Work side rail section 11B Preparation side rail section 12 Support body 12a Bracket 12b Main support 13 Cross beam 14 Traveling means 15 First support leg (loading support leg)
15a bracket 15c auxiliary support 16 second support leg (support leg for loading and unloading)
16a bracket 16c auxiliary support 17 transport support leg 2 traversing means (equipment unit)
21 Traverse carriage 21a Drive wheel 21b Driven wheel 22 Carriage drive source 23 Holder 23d Engagement portion 23e Opening 24 Holder drive source 3 Suspension means (equipment unit)
Description of the Reference Signs 31 Lifting cart 31a Drive wheel 31b Driven wheel 32 Carriage drive source 33 Support frame 33a Support beam 33e Slit 34 Frame drive source 35 Sling 36 Feed-out section 36a Fixed sheave 36b Slide section 361 Sling connection section 362 Sheave support section 363 Shaft section 36d Linear actuator 37 Load cell 4 Control device 41 Determination means 42 Traverse control means 5 Power supply unit (equipment unit)
51 Pedestal 52 Generator 6 Transport vehicle 61 Cargo platform 7 Floor slab (transport object)
8. Hanging jig (for transported object)
81 Base 82 Reinforcement 83 Load distribution 84 Leg 85 Pillar 86 First engaging portion 87 Second engaging portion 87a Engagement hole A Work area B Preparation area

Claims (6)

a lifting means capable of lifting and lowering the object to be transported via a sling and moving along a support rail;
a determination means for determining whether the object to be transported is in a suspended state suspended by the sling or in a non-suspended state not suspended by the sling;
a traverse control means for switching between a state in which the movement of the hoisting means is prevented and a state in which the movement of the hoisting means is permitted,
The conveying device is characterized in that the lateral control means, when the determination means determines that the device is in a suspended state, executes control to prevent movement of the suspension means, and, when the determination means determines that the device is in a non-suspended state, executes control to allow movement of the suspension means. the hoisting means includes a hoisting carriage capable of traveling along the support rail, and a carriage drive source that applies a driving force to the hoisting carriage;
2. The transport device according to claim 1, wherein the traverse control means deactivates the carriage drive source when the determining means determines that the carriage is in the suspended state. the hoisting means includes a hoisting carriage capable of traveling along the support rail and a locking mechanism capable of preventing the hoisting carriage from traveling,
2. The transport device according to claim 1, wherein the traverse control means activates the lock mechanism when the determining means determines that the transport device is in the suspended state. the hoisting means includes a support frame movable on the hoisting cart in a lateral direction intersecting with the support rail, a frame drive source that applies a driving force to the support frame, a feed section supported by the support frame, and a sling connected to the object to be transported and the feed section ;
The operation unit adjusts the length of the sling that is released,
4. The transport device according to claim 2, wherein the traverse control means deactivates the frame drive source when the determining means determines that the frame is in the suspended state. the hoisting means includes a support frame movable laterally on the hoisting cart intersecting with the support rail, a locking mechanism for preventing movement of the support frame, a feed section supported by the support frame, and a sling connected to the object to be transported and the feed section ;
The operation unit adjusts the length of the sling that is released,
4. The transport device according to claim 2, wherein the traverse control means activates the lock mechanism when the determining means determines that the load is in the suspended state. the lifting means includes a sling connected to the object to be transported, a feeder for adjusting the length of the sling to be fed, and a load cell for measuring a tensile force acting on the sling;
2. The transport device according to claim 1, wherein the determining means determines that the load is suspended when the magnitude of the tensile force measured by the load cell exceeds a threshold value.