JP7482307B1 - Conveyor - Google Patents

Abstract

[Problem] To provide a transport device capable of adjusting the holding position of a work target. [Solution] The transport device comprises a support base 1 and a traverse means 2 supported by the support base 1. The traverse means 2 has a traverse carriage 21 movable along a support rail 11 provided on the support base 1, and a holding part 23 capable of holding an object, the holding part 23 being supported by the traverse carriage 21 and movable laterally relative to the traverse carriage 21. The traverse carriage 21 has a running body 21c equipped with wheels that runs on the support rail 11, and a rotating body 21d supported by the running body 21c. The rotating body 21d is rotatable about an axis in the vertical direction. The holding part 23 is supported by the rotating body 21d and movable laterally relative to the rotating body 21d. [Selected Figure] Figure 1

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

For example, in deck replacement work, the deck being worked on needs to be moved laterally above the work area, but from the standpoint of preventing parts or cut pieces of the deck from flying or falling outside the work area, it is preferable for the entire deck being moved to be contained within the work area.
From this viewpoint, an object of the present invention is to provide a transport device capable of moving a work object laterally, and capable of adjusting a holding position of the object.

The transport device according to the present invention includes a support stand and a traverse means supported by the support stand.
The lateral movement means has a lateral movement cart that can move along a support rail provided on the support stand, and a holding part that can hold an object, the holding part being supported by the lateral movement cart and being movable laterally relative to the lateral movement cart.
According to the present invention, the holding unit holding the object can be moved laterally relative to the traversing cart. That is, according to the present invention, by moving the holding unit holding the object laterally, it is possible to prevent a part of the object held by the holding unit from protruding from the working area.

The traverse vehicle may have a running body having wheels that run on the support rail, and a rotating body supported by the running body. In this case, it is preferable that the rotating body is rotatable about an axis in a vertical direction, and the holding part is supported by the rotating body and is slidable relative to the rotating body in a direction intersecting the axis .
In this way, it is possible to change the orientation of the object held by the holder. If there is a risk that a part of the object may protrude from the working area during the process of changing the orientation of the object, it is preferable to move the holder laterally before rotating the rotating body.

The traverse carriage preferably has a linear actuator for moving the holding portion in a lateral direction.
In this way, the holder can be moved laterally without manual force, reducing the workload.

The conveying device according to the present invention preferably includes a suspending means for lifting the object toward the traverse means. In this case, the traverse means is preferably capable of moving along the support rail in a state in which the object not suspended by the suspending means is held by the holding portion.
In such a conveying device, the object lifted by the lifting means is handed over to the traverse means, and then the object can be moved traversely by the traverse means. In this way, even if there is a height difference between the origin or destination of the object and the traverse means, the object can be easily held by the traverse means.

It is preferable that the traverse means is disposed below the support rail, and the hoisting means is disposed above the support rail. By disposing the traverse means below the hoisting means, it is possible to shorten the lifting range of the hoisting means.

The present invention allows the holding position of the object to be easily adjusted.

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. 2(b) is a cross-sectional view taken along line AA of FIG. FIG. 1 is a perspective view showing a first stand unit; FIG. 2 is a perspective view showing a second stand unit and a power supply unit. 1A and 1B are diagrams showing a traverse means, in which FIG. 1A is a perspective view and FIG. 5A is a cross-sectional view taken along line B-B of FIG. 5B; FIG. 5B is a cross-sectional view taken along line CC of FIG. 5A; and FIG. 5C is a cross-sectional view showing the state in which the lock pin has been advanced. 6A and 6B are side views showing a state in which a holding portion of the traverse means is slid laterally from the center of rotation of the rotating body. FIG. FIG. 2 is a functional block diagram of a transport device according to the embodiment. FIG. 2 is a perspective view showing the state in which the hanging jig is attached to the deck slab. 1A is a plan view of the hanging jig, FIG. 1B is a front view, and FIG. 1C is a cross-sectional view showing a state in which a holding portion of a traverse means is engaged with a receiving portion of the hanging jig. 11A and 11B are diagrams illustrating movable modes of the support stand. 1A and 1B are diagrams showing a state in which a first platform unit constituting a transport device is loaded onto a transport vehicle, in which FIG. 10A and 10B are diagrams showing a state in which a second platform unit constituting the transport device is loaded onto a transport vehicle, in which FIG. 1A to 1C are perspective views illustrating a first loading step for explaining an assembly method of the transport device according to the embodiment; 1A to 1C are perspective views illustrating a first loading step of a conveying device according to an embodiment of the present invention; 1A to 1C are perspective views for explaining a method for assembling the transport device according to the embodiment, each showing a stage installation step. 10A and 10B are diagrams for explaining an assembly method of a conveying device according to an embodiment, in which (a) is an oblique view showing a second loading process, (b) is an oblique view showing a first equipment unit moving process, and (c) is an oblique view showing a first equipment unit installation process. 10A and 10B are diagrams for explaining a method of assembling a conveying device according to an embodiment, in which (a) is an oblique view showing an equipment unit pull-out process, (b) is an oblique view showing a second equipment unit moving process, and (c) is an oblique view showing a second equipment unit installation process. 10A and 10B are perspective views illustrating a first carrying-in step, and FIG. 10C is a perspective view illustrating a frame installation step, illustrating a method of assembling a conveying device according to another embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a perspective view showing a conveying device according to an embodiment.
FIG. 2 is a diagram showing the conveying device according to the embodiment, where (a) is a plan view and (b) is a side view.
FIG. 3 is a cross-sectional view taken along line AA of FIG.
FIG. 4A is a perspective view showing a first stand unit, and FIG. 4B is a perspective view showing a second stand unit and a power supply unit.
The conveying device 100 according to this embodiment is a construction facility for conveying decks used when replacing an existing deck on a bridge with a new deck. The cargo (suspended load) conveyed to and from the work site is a deck, and the work object (hereinafter referred to as the "transported object") conveyed by the conveying device 100 is "a deck 7 with a hanging jig 8 attached" or "only the hanging jig 8". Note that the deck 7 shown in Figs. 1 to 3 is an existing deck, but it may be a newly constructed deck. In addition, there is no restriction on the shape of the deck, and it includes not only flat decks, but also L-shaped decks integrated with a wall parapet.

As shown in Fig. 1, the conveying device 100 of this embodiment is installed in a work area A (area marked with a dot in Fig. 1) and a preparation area B. The 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. The preparation area B is an area adjacent to the 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.

1 to 3, 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. 9) for controlling the traverse means 2 and the hoisting means 3, a power supply unit 5 for supplying power to the traverse means 2 and the hoisting means 3, and a hoisting jig 8 attached to a deck 7.
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 and 2), which is a mode in which the deck slab is transported in and out using an equipment unit, and a movable mode (see Figure 12), which is a mode in which the conveying device 100 is relocated.

When the support cradle 1 itself is transported to and from the work site (see Figures 13 and 14), it is divided into multiple (two in this embodiment) cradle units 1A and 1B. That is, the support cradle 1 in this embodiment is formed by connecting two cradle units 1A and 1B. In this embodiment, the cradle units 1A and 1B are connected via a connecting beam unit 1C. 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 and 1B can be set appropriately according to the size of the support cradle 1 and the conditions of the work site.

The support frame 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, cross beams 13A, 13B, and 13C connecting adjacent support rails 11, a cross beam 13D (see FIG. 4A ) connecting left and right supports 12, 12 arranged at the front end, and a reinforcing frame 16 arranged on the side of the support rail 11. In this embodiment, the support rails 11, the supports 12, the cross beams 13A, 13B, 13C, and 13D, and the reinforcing frame 16 form the main body of the support frame 1 (the frame in the fixed mode).
The support cradle 1 also includes a running means 14, a loading support leg 15, and transport support legs 17A and 17B as equipment used in modes other than the fixed mode.
Furthermore, the support stand 1 is equipped with a lifting mechanism 18 capable of raising and lowering the equipment unit.

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.
The support rail 11 is a girder 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 surface of the upper flange of the support rail 11 is the running surface of the hoisting means 3, and is equipped with an upper rail 11a. The upper rail 11a is a member that guides the lateral movement of the hoisting means 3, and is fixed to the upper surface of the upper flange of the support rail 11.

The upper surface of the lower flange of the support rail 11 is the running surface of the traverse means 2. In this embodiment, the upper surface of the lower flange that protrudes from the lower end of the web of the support rail 11 toward the other support rail 11 is used as the running surface of the traverse means 2. Note that the upper surface of the lower flange that protrudes outward may also be used as the running surface of the traverse means 2. Also, a lower rail may be attached to the lower flange of the support rail 11, etc.
The type of steel material constituting the support rail 11 is not particularly limited, and can be appropriately selected from I-beams, H-beams, channel steel, square steel pipes, and the like.

As shown in Figures 1 and 2, each support rail 11 has a working side rail section 11A arranged above the working area A, a preparation side rail section 11B arranged above the preparation area B, and a connecting rail section 11C interposed between the working side rail section 11A and the preparation side rail section 11B. The working side rail section 11A is a member that constitutes the first stand unit 1A, and the preparation side rail section 11B is a member that constitutes the second stand unit 1B. The connecting rail section 11C is a member that constitutes the connecting girder unit 1C.

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, and support the support rails 11 via the first cross beams 13A. 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, and the like.
The support 12 of this embodiment includes a support pillar having a length adjustment mechanism. The support pillar extends downward from the end of the cross beam 13A. The support 12 of this embodiment includes an upper tube, a lower tube inserted into the upper tube, legs inserted into the lower tube, shoes attached to the lower ends of the legs, and a linear actuator (e.g., a hydraulic jack) that moves the lower tube forward and backward relative to the upper tube.

One of the three supports 12 supporting one support rail 11 is connected to the front end of the work-side rail portion 11A, and the remaining two are connected to both ends of the preparation-side rail portion 11B. The support 12 connected to the work-side rail portion 11A is a member constituting the first gantry unit 1A, and the support 12 connected to the preparation-side rail portion 11B is a member constituting the second gantry unit 1B.
4A and 4B, the upper ends of the supports 12 arranged on the front end side of the first gantry unit 1A and the front end of the second gantry unit 1B are also supported by brackets 12a. The brackets 12a protrude laterally from the outer surfaces of the support rails 11 and connect the support rails 11 and the supports 12. One end of the brackets 12a is connected to the side surface of the support rails 11 via a hinge, and the other end of the brackets 12a is connected to the side surface of the support rails 11 via a hinge.

The first cross beam 13A, the second cross beam 13B and the third cross beam 13C are members that maintain the distance between adjacent support rails 11, 11 on the left and right.
The positions and number of the cross beams 13A, 13B, and 13C are not limited to those shown in the figure, and can be changed depending on the length of the support rail 11, etc.

The first cross beam 13A is installed on the support rails 11, 11 between the adjacent supports 12, 12 on the left and right. That is, the cross beam 13A is disposed at both ends and the middle portion of the support rail 11.
The first cross beam 13A has a girder main body portion 13b that is horizontally supported on the left and right support rails 11, 11, and girder extension portions 13a, 13a that extend laterally from the girder main body portion 13b.
An end of the girder main body 13b penetrates the web of the support rail 11 and protrudes to the outer surface side of the web. The outer peripheral surface of the girder main body 13b is welded to the support rail 11. The girder main body 13b is made of a square cylindrical steel material and is capable of accommodating the girder extension 13a.
The base end side of the girder extension 13a is inserted into the girder main body 13b. The tip of the girder extension 13a is joined to the outer circumferential surface of the support 12. The girder extension 13a is slidable relative to the girder main body 13b. A length adjustment mechanism for the cross beam 13A is formed by slidably connecting the girder extension 13a and the girder main body 13b. That is, when the insertion length of the girder extension 13a into the girder main body 13b is increased, the cross beam 13A is contracted, and when the girder extension 13a is pulled out from the girder main body 13b, the cross beam 13A is extended.
The girder extension 13a may be disposed on only one end of the girder main body 13b. In this case, the other end of the girder main body 13b is fixed directly to the support rail 11.

The second cross beam 13B and the third cross beam 13C are spanned across the left and right support rails 11, 11. The second cross beam 13B is made of steel and is joined to the web of the support rail 11.
The third cross beam 13C is made of a square tubular steel material and communicates with an opening formed in the web of the support body 11.

The fourth cross beam 13D is a member that maintains the distance between the left and right supports 12, 12 arranged at the front end of the working side rail section 11A. The fourth cross beam 13D has a girder main body section 13d that is horizontally supported on the left and right supports 12, 12 below the first cross beam 13A, and girder extension sections 13c, 13c that extend laterally from the girder main body section 13d. The girder main body section 13d has a rectangular cylindrical section and can accommodate the girder extension section 13c. The girder extension section 13c is slidable relative to the girder main body section 13d. A length adjustment mechanism for the cross beam 13D is formed by slidably connecting the girder extension section 13c and the girder main body section 13d.

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 trackless bogie and includes a drive source (e.g., an in-wheel motor) that rotates the axles. The traveling means 14 may be a tracked 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 reinforcing frame 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 beams 13A, 13B, and 13C (the direction perpendicular to the bridge axis). In this embodiment, as shown in FIG. 12, 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.

The loading support legs 15 are used when the first platform unit 1A transported by the transport vehicle 6 is unloaded from the loading platform 61, or when the platform unit 1A is loaded onto the loading platform 61 (see Figs. 16(b) and (c)). The platform unit 1A is provided with two loading support legs 15, 15, one on each side (see Fig. 2(a)). The position and number of the loading support legs 15 can be changed depending on the platform unit 1A, its size, weight, etc.

As shown in FIG. 4A, the loading support leg 15 includes a bracket 15a attached to the third cross beam 13C and an auxiliary support column 15b attached to the bracket 15a.
The bracket 15a has a square tube shape and is inserted into the third cross beam 13C. The bracket 15a can advance and retreat relative to the third cross beam 13C. In other words, the box-shaped bracket 15a is inserted into the third cross beam 13C, and the bracket 15a can be pulled out from the cross beam 13C.
The auxiliary column 15b is attached to the end of the bracket 15a. The auxiliary column 15b can select a storage state (see FIG. 4A) along the side of the support rail 11 and a use state (see FIG. 16(b) and (c)) along the vertical direction. When switching between the storage state and the use state, the bracket 15a is pulled out from the third cross beam 13C, the auxiliary column 15b is rotated 90 degrees, and then the bracket 15a is inserted into the cross beam 13C. The auxiliary column 15b has a length adjustment mechanism. The auxiliary column 15b of this embodiment is a linear actuator (e.g., a ball jack, etc.), and includes a cylinder attached to the bracket 15a, a rod that can be inserted into and removed from the cylinder, and a shoe attached to the tip of the rod. The auxiliary column 15b can raise and lower the first frame unit 1A when erected on the floor slab.
As described above, the loading support leg 15 is used in a form other than the fixed mode, and is equipped with an extension portion (bracket 15a) that can extend laterally from the main body (work side rail portion 11A) of the first mounting unit 1A, and an auxiliary support pillar 15b that can extend downward from the extension portion.

As shown in FIG. 4B, the reinforcing frame 16 is horizontally supported on adjacent supports 12, 12 in the longitudinal direction of the support rail 11.
The second frame unit 1B is provided with two reinforcing frames 16, 16 facing each other with the preparation side rail portions 11B, 11B therebetween.

The reinforcing structure 16 is a structure including pillars and beams, and is disposed parallel to the support rail 11. The reinforcing structure 16 of this embodiment includes a bracket 16a attached to the support body 12, a pair of upper and lower beams 16b, 16b, and a plurality of auxiliary pillars 16c and a plurality of vertical members 16d that connect the upper and lower beams 16b, 16b.
The bracket 16a protrudes from the auxiliary support 16c towards the support 12 and is joined to the outer surface of the support 12. In this embodiment, two brackets 16a, 16a, one above and one below, are arranged for one support 12. The upper and lower brackets 16a, 16a are arranged at the same height as the upper and lower beam portions 16b, 16b.
The beam portion 16b is horizontally supported by the auxiliary pillars 16c, 16c adjacent to each other in the front and rear. The reinforcing structure 16 of this embodiment includes two beam portions 16b, 16b, one above the other.
The auxiliary support 16c is interposed between the bracket 16a and the beam 16b. The auxiliary support 16c has a length adjustment mechanism. The auxiliary support 16c in this embodiment is a linear actuator (e.g., a ball jack, etc.), and includes a cylinder attached to the beam 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).
The vertical member 16d connects the upper and lower beam portions 16b, 16b between adjacent auxiliary supports 16c, 16c in the front-rear direction.
In this embodiment, the reinforcing structure 16 is a column-beam structure, but the reinforcing structure 16 may be another structure (for example, a truss structure, etc.).

The transport support legs 17A and 17B shown in Fig. 4A are used when the first gantry unit 1A is transported by a transport vehicle 6 (see Fig. 13). That is, the transport support legs 17A and 17B are for increasing the stability of the gantry unit 1A during transportation, and can be erected on a loading platform 61.
The first transport support leg 17A is disposed between the left and right supports 12, 12 and extends downward from the girder body portion 13d of the fourth cross beam 13D. In this embodiment, a pair of transport support legs 17A, 17A are disposed between the left and right supports 12, 12.
The second transport support legs 17B are disposed on the left and right support rails 11, 11. The positions and number of the transport support legs 17A, 17B are not limited to those shown in the figure, and can be changed depending on the size, weight, etc. of the pedestal unit 1A.
The second transport support leg 17B 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 lower surface (lower flange) 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 FIG. 13).

The lifting mechanism 18 has a function of lifting and lowering the equipment unit. The lifting mechanism 18 of this embodiment includes a support shaft 18a provided at the end of the support frame 1, a rotating frame 18b that can rotate in the vertical direction around the support shaft 18a, and a tensioning means 18c that supports the rotating frame 18b. The support shaft 18a is supported by a bearing bracket 18d of the support frame 1. The bearing bracket 18d is supported by the upper end of the support body 12 located at the end of the support frame 1.
The rotating frame 18b can rotate with the equipment unit suspended. The rotating frame 18a can rotate between a first position where it projects outward from the support cradle 1 and a second position where at least a part of the equipment unit suspended by the rotating frame 18a is located above the support cradle 1. The rotation range of the rotating frame 18b in the process of raising and lowering the equipment unit by the lifting mechanism 18 is a range in which the angle between the horizontal plane passing through the support shaft 18a and the rotating frame 18b is 90 degrees or less above the horizontal plane. The first position and the second position correspond to the lower limit position and the upper limit position of the rotation range in the process of raising and lowering the equipment unit. When not in use, the rotating frame 18b can rotate to a position beyond the first position or the second position. For example, when the support cradle 1 is carried in or out, if the rotating frame 18b in the first position is rotated downward, the rotating frame 18b can be stored in a state where it is aligned with the support 12 of the support cradle 1. Furthermore, when the rotating frame 18b in the second position is rotated in a direction away from the first position, the rotating frame 18b can be stored in a state where it is aligned with the upper beam portion 16b of the reinforcing structure 16.
The tensioning means 18c has a function of supporting the rotating frame 18b which is about to rotate downward, and also rotates the rotating frame 18b toward the second position. The tensioning means 18c in this embodiment is made of a chain block stretched between the rotating frame 18b and the reinforcing frame 1, and the angle of the rotating frame 18b with respect to the horizontal plane can be changed by adjusting the length of the chain.

The rotating frame 18b of this embodiment includes a pair of left and right arms 181, a support beam 182 connecting the arms 181, and a connection bracket 183 to which the tension means 18c is connected.
The arm 181 has a length adjustment mechanism. The arm 181 in this embodiment includes a first arm 181a connected to the support shaft 18a and a second arm 181b that can be extended and retracted from the first arm 181a. The first arm 181a is a cylindrical member made of a steel pipe or the like. One end of the second arm 181b is inserted into the first arm 181a, and the other end of the second arm 181b is joined to the support beam 182.
The support beam 182 has a length adjustment mechanism. The support beam 182 of this embodiment includes a first beam portion 182a and a pair of second beam portions 182b, 182b that can be inserted and removed from the first beam portion 182a. The first beam portion 182a is a cylindrical member made of a steel pipe or the like. One end side of the second beam portion 182b is inserted into the first beam portion 182a, and the other end of the second beam portion 182b is fixed to the tip of the arm 181 (the tip of the second arm portion 181b).
The connection bracket 183 is fixed to the tip of the first arm portion 181 a. The connection bracket 183 may be fixed to the second arm portion 181 b or to the support beam 182.

<Transgressive methods>
3, 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) and is supported by a support frame 1. The traverse means 2 in this embodiment is capable of moving along a support rail 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 rail 11.
5A and 5B are diagrams showing the traverse means 2, in which (a) is a perspective view and (b) is a side view. Note that in Fig. 5, the illustration of the support rails 11 is omitted.
The traverse means 2 is provided with, as a configuration for moving (traverse) in the front-rear direction, 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 capable of holding an object to be transported, 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 drive wheels 21a and driven wheels 21b as shown in Fig. 5(a). The drive wheels 21a and driven wheels 21b engage with the lower flange of the support rail 11 (see Fig. 3) and roll on the upper surface of the lower flange. The number and arrangement of the drive wheels 21a and driven wheels 21b may be appropriately determined according to the shape of the frame, the load balance, and the like.
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 traverse cart 21 includes a running body 21c having wheels (driving wheels 21a and driven wheels 21b), a rotating body 21d supported by the running body 21c, and a rotating body drive source 21e that applies driving force to the rotating body 21d.
The running body 21c includes a main body 211 that supports the rotating body 21d, and a pair of axle bearings 212, 212 arranged side by side with a gap therebetween on the main body 211. A rotating body drive source 21e is attached to the main body 211. The drive wheels 21a, the driven wheels 21b, and the carriage drive source 22 are attached to the axle bearing 212.
The rotating body 21d is rotatable about an axis in the vertical direction, and includes a cylindrical base 213, overhanging parts 214, 214 overhanging laterally from the base 213, a gear 215 arranged circumferentially on the outer periphery of the upper end of the base 213, and a reaction force receiving part 216 attached to the overhanging part 214. Although not shown, the base 213 is supported by an annular receiving part (e.g., a thrust ball bearing) provided on the running body 21c. The overhanging part 214 is formed with a guide slit 217 extending in the left-right direction.
The rotating body drive source 21e is a drive source (e.g., an electric motor) that rotates the rotating body 21d, and rotates the pinion 218 via a gear mechanism (not shown) such as a worm gear arranged in the main body 211. The pinion 218 meshes with the gear 215 and transmits the driving force of the rotating body drive source 21e to the gear 215. In other words, when the rotating body drive source 21e is operated, the rotating body 21d rotates about an axis in the vertical direction. By rotating the rotating body 21d using the gear 215 and the pinion 218, it becomes possible to easily change the orientation of the transport object held by the holding unit 23.

The bogie drive source 22 is a drive source (e.g., an electric motor) that rotates the axle of the drive wheel 21a, and is mounted on the running body 21c 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 unit 23 is supported by the lateral traveling cart 21, and can move laterally relative to the lateral traveling cart 21 even in a state in which it holds an object to be transported that is not suspended by the hoisting means 3. The holding unit 23 in this embodiment includes a base 23a supported in a slidable state on the rotating body 21d of the lateral traveling cart 21, and an engagement mechanism 23b that engages with the hoisting jig 8.
The base 23a includes a guide pin 231 that is inserted into the guide slit 217. The guide pin 231 is engaged with an edge of the guide slit 217 and is movable in the extension direction of the guide slit 217. That is, the base 23a is movable laterally relative to the revolving body 21d. Here, Fig. 7(a) shows a state in which the holding part 23 is slid rightward from the rotation center P of the revolving body 21d, and Fig. 7(b) shows a state in which the holding part 23 is slid leftward from the rotation center P of the revolving body 21d. In addition, in Figure 7, the holding portion 23 moves in a horizontal direction (left-right direction) perpendicular to the longitudinal direction of the support rail 11, but if the rotating body 21d is rotated 90 degrees from the position in Figure 7, the holding portion 23 can move in a horizontal direction (front-to-back direction) along the longitudinal direction of the support rail 11, and if the rotating body 21d is rotated 45 degrees from the position in Figure 7, the horizontal holding portion 23, which is diagonal to the longitudinal direction of the support rail 11, can move.
The hook mechanism 23b hooks onto a receiving portion 81 provided on the hanging jig 8 in a state in which it cannot move in the vertical direction and cannot rotate around a vertical axis.

6A and 6B are diagrams showing the holding portion 23 of the traverse means 2, where (a) is a cross-sectional view taken along line B-B in FIG. 5B, (b) is a cross-sectional view showing the state in which the lock pin has been advanced, and (c) is a cross-sectional view taken along line C-C in (a).
The engagement mechanism 23b in this embodiment includes a storage section 232, a central shaft section 233 arranged in the center of the storage section 232, a rotating table 234 arranged within the storage section 232, a driving source 235 that rotates the rotating table 234, and multiple (four in this embodiment) lock pins 236 that protrude from and retract into the storage section 232.

The accommodation portion 232 includes an outer cylinder 232a having a cylindrical outer circumferential surface, an inner cylinder 232b arranged inside the outer cylinder 232a, a tapered portion 232c arranged at the lower end of the outer cylinder 232a, and a stiffener 232d having a cross shape in a plan view arranged at the lower portion of the inner cylinder 232b. When the holding portion 23 is in the neutral position, the center of the accommodation portion 232 is concentric with the rotation center P (see FIG. 7) of the rotating body 21d.
The central shaft portion 233 is supported at the center of the stiffener 232d, and passes through the rotary table 234. A lever 233a is formed on the upper end of the central shaft portion 233 and protrudes laterally.

The rotating table 234 is a disk fixed to the central shaft portion 233 and can rotate in the circumferential direction around the central shaft portion 233. A plurality of (four in this embodiment) lock pin guides 233b are formed on the rotating table 234. The lock pin guides 233b are formed of arc-shaped slits. Of both ends of the lock pin guide 233b, the end (center end) provided near the center of the rotating table 234 is arranged on a virtual circle centered on the central shaft portion 233, and the end (outer periphery end) provided near the outer periphery of the rotating table 234 is arranged on a virtual circle with a larger diameter than the virtual circle.
The driving source 235 is a linear actuator (e.g., an electric cylinder) that moves the lock pin 236 forward and backward, and is disposed between the inner peripheral surface of the inner cylinder 232b and the lever 233a. When the rod of the driving source 235 (linear actuator) is moved forward and backward, the rotary table 234 rotates around the central shaft portion 233.

The lock pin 236 is arranged along the radius of the rotary table 234. The multiple lock pins 236 are arranged at intervals in the circumferential direction of the rotary table 234. That is, the multiple lock pins 236 are arranged radially around the central shaft portion 233. The lock pin 236 includes a pin body 236a that penetrates the outer tube 232a and the inner tube 232b of the storage portion 232, and a connecting body 236b that extends from the pin body 236a toward the central shaft portion 233. The end of the connecting body 236b engages with the lock pin guide 233b.

The lock pin 236 advances and retreats in the radial direction of the rotary table 234 as the rotary table 234 rotates. For example, when the rod of the driving source 235 (linear actuator) is retracted, the end of the connecting body 236b of the lock pin 236 engages with the central end of the lock pin guide 233b, and the entire pin body 236a is recessed in the accommodation portion 232 (does not protrude from the outer cylinder 232a). From this state, when the rod of the driving source 235 (linear actuator) is advanced, the rotary table 234 rotates (counterclockwise in FIG. 6B), and the lock pin guide 233b also moves in the circumferential direction. Since the orientation of the lock pin 236 is invariable, when the lock pin guide 233b moves in the circumferential direction, the end of the connecting body 236b moves in the radial direction of the rotary table 234, and the lock pin 236 is pushed out of the accommodation portion 232. As shown in FIG. 6(c), the length of protrusion of the lock pin 236 from the housing portion 232 is maximum when the end of the connecting body 236b is engaged with the outer peripheral end of the lock pin guide 233b. To retract the lock pin 236 protruding from the housing portion 232, the rod of the driving source 235 (linear actuator) is retracted.

The holding section drive source 24 shown in FIG. 5 is a drive source that moves the holding section 23 relative to the traverse cart 21. In this embodiment, the holding section drive source 24 is a linear actuator (e.g., an electric actuator) arranged on the rotating body 21d, and includes a cylinder and a rod that advances and retracts relative to the cylinder. The holding section drive source 24 is fixed to the overhanging portion 214 of the rotating body 21d and the base 23a of the holding section 23. In this embodiment, the tip of the rod is fixed to the base 23a of the holding section 23, and the cylinder is fixed to the overhanging portion 214 of the rotating body 21d. The holding section drive source 24 pushes and pulls the base 23a of the holding section 23 by applying a reaction force to the traverse cart 21, thereby sliding the holding section 23 using the guide slit 217 of the overhanging portion 214 as a guide. It is preferable that the maximum output of the holding section drive source 24 is large enough that the holding section 23 cannot be moved while holding the transport object. In this embodiment, two holding unit drive sources 24 are arranged in front of and behind the base 213 of the rotating body 21d, but the number and positions of the holding unit drive sources 24 can be changed.

<Suspension Means>
3, the hoisting means 3 is supported by the support frame 1 and 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. 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 33, 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 33 has become detached from the object to be transported, or a state in which the sling 33 is connected to the object to be transported but is loose.
The hoisting means 3 is provided with, as components for moving forward and backward (transversely), a hoisting cart 31 capable of running along the support rails 11, and a cart drive source 32 (see FIG. 3) for applying a driving force to the hoisting cart 31. Furthermore, the hoisting means 3 is provided with, as components for raising and lowering the transported object, a plurality of slings 33 connected to the transported object, a feed section 34 for adjusting the payout length of each sling 33, and a load cell 35 for measuring the tensile force acting on each sling 33.

FIG. 8 is a perspective view showing the suspending means 3. As shown in FIG.
As shown in Figure 8, the lifting cart 31 comprises a base 31c formed by combining steel materials, a driving wheel 31a and a driven wheel 31b provided on the base 31c, a guide support portion 31d extending from the base 31c, and a guide portion 31e supported by the guide support portion 31d.

The driving wheels 31a and the driven wheels 31b engage with the upper rail 11a (see FIG. 4A) of the support rail 11 and roll on the upper surface of the upper rail 11a. The number and arrangement of the driving wheels 31a and the driven wheels 31b may be appropriately set according to the shape of the base 31c, the load balance, etc.
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 is a drive source (e.g., an electric motor) that rotates the axle of the drive wheel 31a, and is mounted under the base 31c 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 while 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 base 31 c is provided with mounting seats and brackets for fixing the devices and members that constitute the suspending means 3 .
The guide support portion 31d is provided on both the left and right sides of the base 31c. The guide support portion 31d includes a base portion 311 that protrudes laterally from the side of the base 31c, a pair of protruding portions 312, 312 that protrude forward and backward from the base portion 311, and a support tube 313 provided at the tip of each protruding portion 312.
The guide portion 31e is a pipe or rod extending downward from the guide support portion 31d, and is inserted into the support tube 313. A flange for preventing the guide portion 31e from coming off is formed at the upper end of the guide portion 31e. The upper end of the guide portion 31e is engaged with the upper end surface of the support tube 313. The guide portion 31e has a basic position in a state where it is engaged with the upper end surface of the support tube 131 (i.e., a state where it extends downward from the support tube 131), but can move upward when it receives an upward force. When the upper end of the guide portion 31e is engaged with the upper end surface of the support tube 131, the lower end of the guide portion 31e is located to the side of the rotating body 21d of the traverse means 2. The guide portion 31e of this embodiment is made of a pipe. The lower end of the guide portion 31e is expanded in diameter in a cone-shaped manner.

The slings 33 hang down from the lifting means 3 and pass along the side of the traverse means 2 to reach the object to be transported. The slings 33 are, for example, wire rope slings, chain slings, belt slings, etc. In this embodiment, a total of four slings 33 are arranged on either side of the left and right support rails 11, 11. The four slings 33 are arranged around the traverse means 2. The lower ends of the slings 33 are hooked onto the attachment 8B of the lifting jig 8.

The feeding unit 34 adjusts the payout length of the slings 33, and is mounted on the base 31c of the hoisting cart 31. The feeding unit 34 can adjust the payout length of each of the four slings 33 individually.
The payout section 34 of this embodiment includes a fixed sheave 34a supported by the base 31c, a drum 34b that winds up the sling 33, and a hoisting drive source 34c that applies a driving force to the drum 34b. Four fixed sheaves 34a, drums 34b, and hoisting drive sources 34c are provided corresponding to the four slings 33.

Two fixed sheaves 34a are disposed on each side of the base 31c of the hoisting cart 31. Each fixed sheave 34a is supported by a bracket extending from the base 31c. The height positions of two adjacent fixed sheaves 34a, 34a on the left and right are shifted up and down.
The drums 34b are arranged at the four corners of the base 31c of the hoisting cart 31.
The hoisting drive source 34c is disposed adjacent to the drum 34b. In this embodiment, the hoisting drive source 34c is an electric motor. Alternatively, a hydraulic motor may be used as the hoisting drive source 34c.

In the lifting means 3 of this embodiment, the sling 33 extending from the transport object toward the drum 34b reaches the drum 34b via the fixed sheave 34a.
More specifically, the right sling 33 extending upward from the transport object is looped around the right fixed sheave 34a by about 1/4 turn, passes above or below the right drum 34b, and heads toward the left drum 34b. On the other hand, the left sling 33 extending upward from the transport object is looped around the left fixed sheave 34a by about 1/4 turn, passes above or below the left drum 34b, and heads toward the right drum 34b.

The load cell 35 is a load meter that measures the tensile force acting on the sling 33. In this embodiment, the load cell 35 is attached to the rotating shaft of the fixed sheave 34a.

<Control device>
FIG. 9 is a functional block diagram of a conveying device 100 according to an embodiment.
The control device 4 controls the traverse means 2 and the suspension means 3 based on data acquired by the load cell 35 or commands from the controller D. The control device 4 can be provided in the support frame 1 or the equipment unit (traverse means 2, suspension means 3, power supply unit 5). The control device in this embodiment is attached to the reinforcing frame 16. The control device 4 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 33 (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 load) acquired by the load cell 35. That is, when the magnitude of the load measured by the load cell 35 exceeds a threshold value, the determination means 41 determines that the object is suspended from the sling 33 (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 33 (non-suspended state). Since the load value output from the load cell 35 is a value that reflects the tensile force acting on the sling 33, the use of the data acquired by the load cell 35 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 34).
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 unit 23 of the traverse means 2, and the hoisting carriage 31 of the hoisting means 3) are as operated by the controller D. 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 D 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 (carriage driving source 22, holding unit driving source 24) and the driving source of the hoisting means 3 (carriage driving source 32). 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 travelling cart 21, the holding part 23 and the hoisting cart 31, the lateral travel control means 42 executes control to activate the locking mechanism (such as control to cause a stopper to appear) as lateral travel prevention control.

The lifting control device 43 has a function of controlling the hoisting drive source 34c of the delivery section 34 so that the operation of lifting and lowering the transport object is performed in accordance with the operation of the controller D.
The rotation control means 44 has a function of controlling the rotating body drive source 21e so that the rotation direction of the rotating body 23d of the traverse means 2 is in accordance with the operation of the controller D.

<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 base 1 in a state of extending from the support base 1 in a cantilevered manner.
As shown in FIG. 4 , the power supply unit 5 includes a frame 51 and a generator 52 mounted on the frame 51 .
The frame 51 includes a floor plate 51a, vertical frames 51b erected at the four corners of the floor plate 51a, horizontal frames 51c connecting the vertical frames 51b, and legs 51d extending downward from the four corners of the floor plate 51a. Of the four legs 51d, the leg 51d on the support base 1 side is fixed to an end of the support rail 11.
The power supply unit 5 is supported on the support rails 11, 11 via legs 51d of the frame 51, and is also supported by a rotating frame 18b of the lifting mechanism 18 disposed so as to straddle the frame 51. The frame 51 is suspended from the rotating frame 18b via a chain block or the like (not shown).

There is no restriction on the destination of the power supply from the generator 52, but in this embodiment, power is supplied to the drive sources of the traverse means 2 (swivel body drive source 21e, cart drive source 22, holding section drive source 24, drive source 235 for lock pin 236), the drive sources of the suspension means 3 (cart drive source 32, hoisting drive source 34c), the load cell 35, the control device 4, etc., via power cables not shown.
In the process of relocating the transport device 100, when the support frame 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 auxiliary columns 16c), the power supply unit 5 serves as a counterweight. If the weight of the frame 51 and the generator 52 alone cannot be balanced, a member (not shown) that serves as a weight may be mounted on the support frame 1.

<Hanging jig>
As shown in FIG. 1, the lifting jig 8 is a jig for transporting a deck slab, which has a mechanism that can be engaged with the traverse means 2 and the lifting means 3, and is attached to the deck slab 7, which is the cargo.
Figure 10 is an oblique view showing the state in which the hanging jig is attached to the deck slab, and Figure 11 is a diagram showing the hanging jig, where (a) is a plan view, (b) is a front view, and (c) shows the state in which the holding portion of the traverse means is engaged with the receiving portion of the hanging jig.
10, the hanging jig 8 includes a receiving portion 81 that can be engaged with the holding portion 23 (see FIG. 11(c)) of the traversing means 2, and a sling connection portion 88 to which the sling 33 can be connected. In other words, the hanging jig 8 separately includes the receiving portion 81 that can be engaged with the holding portion 23 of the traversing means 2, and the sling connection portion 88 to which the sling 33 can be connected.
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 33 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.
The hanging jig 8 of this embodiment includes a main body 8A and a pair of attachments 8B, 8B detachably attached to the main body 8A.

The main body 8A includes a receiving portion 81, a frame 82 that supports the receiving portion 81, a guide rail 83 (see Figures 11(a) and (b)) provided on the frame 82, a fixing portion 84 that is fixed to the deck 7, position adjustment mechanisms 85A and 85B that adjust the fixing position to the deck 7, and an attachment engaging portion 86 to which the attachment 8B can be engaged.

11(c), the receiving portion 81 is a portion that engages with the holding portion 23 of the traverse means 2, and is disposed in the center of the main body portion 8A. The receiving portion 81 in this embodiment includes a tubular portion 81a into which the holding portion 23 can be inserted.
The tube portion 81a has a cylindrical shape and has an inner peripheral surface that faces the outer peripheral surface (the outer peripheral surface of the outer tube 232a) of the engagement mechanism 23b of the holding portion 23. As shown in Fig. 10, an engagement hole 811 is formed in the inner peripheral surface of the tube portion 81a. The engagement hole 811 has a hole diameter that allows the lock pin 236 of the holding portion 23 to be inserted. A space is secured between the tube portion 81a and the frame 82 that allows the lock pin 236 protruding from the engagement hole 811 to be accommodated.
The cylindrical portion 81a in this embodiment has four engagement holes 811 corresponding to the four lock pins 236 arranged radially at 90 degree intervals. The four engagement holes 811 are arranged at equal intervals in the circumferential direction. The cylindrical portion 81a is arranged above the deck slab 7, and a space capable of accommodating the lower portion of the retaining portion 23 protruding downward from the receiving portion 81 is secured between the upper surface of the deck slab 7 and the lower end of the cylindrical portion 81a. The position of the cylindrical portion 81a is set so that the center of gravity of the hanging jig 8 is located inside the cylindrical portion 81a.

The frame 82 includes a rectangular central frame portion 82a that surrounds the receiving portion 81, and rail holding portions 82b, 82b that extend above the guide rail 83. The frame 82 is formed by combining a plurality of steel materials vertically and horizontally.
The central frame portion 82a is formed of steel material arranged around the receiving portion 81, and supports the receiving portion 81 via a reinforcing member extending from the central frame portion 82a to the cylindrical portion 81a of the receiving portion 81. The four inner corners of the central frame portion 82a face the engagement holes 811 of the receiving portion 81.
The rail holding portion 82b is made of steel and is disposed above the guide rail 83. In this embodiment, a pair of rail holding portions 82b, 82b are disposed on both sides of the central frame portion 82a. The rail holding portion 82b includes a plurality of support rods 82c, 82c that support the guide rail 83.

The guide rail 83 is a portion interposed between the frame 82 and the fixed portion 84, and is disposed below the rail holding portion 82b. In this embodiment, a pair of guide rails 83, 83 are disposed below the rail holding portion 82b. The pair of guide rails 83, 83 are connected by a plurality of connecting members 83a.
The guide rail 83 is made of a steel material having a flange on which the fixed portion 84 slides. A connecting portion 83b that is connected to a support rod 82c of the frame 82 is protruded from the upper surface of the guide rail 83.

The fixing portion 84 is disposed below the frame 82. In this embodiment, a pair of fixing portions 84, 84 are disposed on both sides of the receiving portion 81. The fixing portion 84 extends in a direction intersecting the guide rail 83, and is fixed to the deck slab 7 via a fastening part (such as a PC steel bar or an anchor bolt) that penetrates the deck slab 7 or a fastening part that is planted in the deck slab 7.
The fixed portion 84 is made of a steel material placed on the upper surface of the deck 7. Insertion holes are formed at both ends of the fixed portion 84. PC steel bars or the like protruding from the deck slab 7 are inserted into the insertion holes. A sliding portion 84a (see FIG. 10 ) that engages with the upper surface of the flange of the guide rail 83 is formed on the upper surface of the fixed portion 84.

The position adjustment mechanisms 85A and 85B are formed of linear actuators.
The first position adjustment mechanism 85A is a ball jack that moves the guide rail 83 along the support rod 82c, and includes a gear case attached to the rail holding portion 82b of the frame 82, a threaded rod extending from the gear case, and a nut screwed onto the threaded rod. The threaded rod is provided in parallel with the support rod 82c, and the nut is fixed to the connecting portion 83b of the guide rail 83.
The second position adjustment mechanism 85B is a ball jack that moves the fixed part 84 along the guide rail 83, and includes a gear case attached to the end of the guide rail 83, a threaded rod extending from the gear case, and a nut screwed onto the threaded rod. The threaded rod is provided parallel to the guide rail 83, and the nut is fixed to the fixed part 84.

The attachment hooking portion 86 is provided on the upper surface of the frame 82. In this embodiment, the attachment hooking portion 86 is made up of a pair of hooking members that face each other with a gap in between in the inward and outward directions of the frame 82. Each hooking member is hook-shaped (inverted L-shaped) and stands on the upper surface of the steel material that constitutes the frame 82. In other words, the attachment hooking portion 86 has a hooking groove with an inverted T-shaped cross section formed by the pair of hooking members.
The frame 82 is provided with first attachment engaging regions 82d, 82d along the longitudinal direction of the fixed portion 84, and second attachment engaging regions 82e, 82e along the longitudinal direction of the guide rail 83. A pair of attachment engaging portions 86, 86 are arranged at intervals in the longitudinal direction of the fixed portion 84 in the first attachment engaging region 82d, and a pair of attachment engaging portions 86, 86 are arranged at intervals in the longitudinal direction of the guide rail 83 in the second attachment engaging region 82e.

The attachment 8B comprises an attachment main body 87 interposed between the sling 33 and the main body portion 8A, a sling connection portion 88 provided on the attachment main body 87, and a positioning portion 89 extending upward from the attachment main body 87.
The attachment 8B of this embodiment extends in the longitudinal direction of the support rail 11 (perpendicular to the plane of the paper in Fig. 3), and includes two sling connection portions 88, 88, as shown in Fig. 8. That is, the attachment 8B is disposed parallel to the support rail 11, and is suspended from two slings 33, 33 adjacent to each other in the longitudinal direction of the support rail 11.

The attachment body 87 is made of a rod-shaped member with an inverted T-shaped cross section, and includes a hook flange 87a and a hook web 87b erected at the center of the width direction of the hook flange 87a. The attachment body 87 has a cross-sectional shape that allows it to be inserted laterally into the hook groove of the attachment hook portion 86 (see FIG. 10). A hook recess 87c is formed on the upper surface of the hook flange 87a. The hook recess 87c is provided at a position corresponding to the attachment hook portion 86, and is large enough to receive the tip of the hook member of the attachment hook portion 86.
The sling connection part 88 is formed at the end of the attachment body 87. In this embodiment, the sling connection part 88 is a hole formed in the hooking web 87b of the attachment body 87. The lower end of the sling 33 is connected to the sling connection part 88 in a non-removable state.
The positioning portion 89 is made of a rod that can be inserted into the guide portion 31e of the suspending means 3, and is provided upright on the upper surface of the engaging web 87b.

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 33 (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 33. Incidentally, the transport device 100, which is equipped with a mechanism that prevents the object to be transported suspended from the sling from traversing, does not qualify as a crane under the Crane Safety Regulations.

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.

In the deck removal process, the object to be transported (the existing deck slab 7 with a hanging jig 8 attached) is raised by the lifting means 3 in the work area A (see Figure 3), and the object to be transported is handed over to the lateral movement means 2 above the work area A (see Figure 1), after which the lateral movement means 2 moves the object to above the preparation area B.
In addition, during the deck removal process, the empty lifting means 3 is sent 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 bed of the transport vehicle.

The deck removal process will be used as an example to explain the deck movement method according to this embodiment in more detail below.
The deck movement method according to this embodiment includes a lifting preparation process (FIG. 10), a lifting process and a lateral travel preparation process (FIGS. 1 and 3), a lateral travel process, a forwarding process and a suspension preparation process, and a suspension process.

The lifting preparation process is a process carried out before lifting the transported object. The lifting preparation process includes a jig transport operation, a jig replacement operation, a jig lowering operation, a jig fixing operation, etc. Fig. 10 shows the state where the lifting preparation process is completed.
The jig transport operation is an operation of moving the main body 8A of the hanging 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 main body 8A of the hanging jig 8 is held by the holding portion 23 of the traverse means 2. During the jig transport operation, the sling 33 of the hanging 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. 9), so that the movement (transverse movement) of the traverse means 2 and the hanging means 3 is permitted. After the main body 8A of the hanging jig 8 is moved to above the deck 7 to be removed by traversing the traverse means 2 in the front-rear direction, the jig replacement operation is started.

The jig replacement work is a work of transferring the main body 8A of the hanging jig 8 held by the traverse means 2 to the hanging means 3. In the jig replacement work, the attachment 8B is engaged with the attachment engaging portion 86 of the hanging jig 8, and the weight of the hanging jig 8 is applied to the sling 33, and then the lock pin 236 of the traverse means 2 is retracted (see FIG. 6(a)), and the engagement between the engaging mechanism 23b of the traverse means 2 and the receiving portion 81 of the main body 8A of the hanging jig 8 is released.
The jig lowering operation is an operation of lowering the hanging jig 8 suspended from the sling 33 to the deck 7. The jig lowering operation is performed by operating the feed-out portion 34 of the hoisting means 3.
The jig fixing work is the work of fixing the main body 8A of the hanging jig 8 to the deck 7. The jig fixing work is performed, for example, by fastening a fastening part such as a PC steel rod that penetrates the deck 7 to the fixing part 84 of the hanging jig 8 (see FIG. 11(b)). Since the position of the PC steel rod or the like provided in the deck 7 differs for each deck 7 depending on the position of the center of gravity of the deck 7 and the position of the rebar, when fixing the hanging jig 8 to the deck slab 7, the position of the fixing part 84 is adjusted using position adjustment mechanisms 85A, 85B.
In addition, if the attachment 8B of the hanging jig 8 is removed from the main body 8A after the jig lowering operation is completed, the attachment 8B is connected to the main body 8A after the jig fixing operation is completed.

3, the lifting process is a process of lifting the transported object (the deck slab 7 to which the lifting jig 8 is attached) using the lifting means 3. The lifting process is performed by operating the delivery section 34 of the lifting means 3.
In the lifting process, the payout length of at least one sling 33 is individually adjusted to correct the posture of the deck slab 7, and then all the slings 33 are wound up at the same speed to lift the deck slab 7 up to the traverse means 2.
In the lifting process, even if the object to be transported is inclined three-dimensionally due to an eccentricity of the center of gravity of the deck slab 7, the posture can be corrected by individually adjusting the extension length of the sling 33, so that even if the center of gravity position differs for each deck slab 7, the posture of the deck slab 7 can be easily corrected, and after the posture of the deck slab 7 is corrected, the deck slab 7 can be lifted up to the traverse means 2 while maintaining that posture. In other words, the posture of the lifted object to be transported can be corrected to a posture that is easy to transfer to the traverse means 2, and thus the task of transferring the object to be transported between the traverse means 2 and the hoisting means 3 can be efficiently performed.

After the object to be transported is raised below the holding part 23 of the traverse means 2, the positioning part 89 of the hanging jig 8 is inserted into the guide part 31e of the hanging means 3, the object to be transported is further raised using the guide part 31e as a guide, and the holding part 23 is inserted into the receiving part 81 of the hanging jig 8 (see FIG. 11(c)). Since the tapered part 232c is formed at the lower end of the holding part 23, the holding part 23 can be easily attached and detached to the receiving part 81. In addition, after the positioning part 89 is inserted into the guide part 31e, the positioning part 89 is guided by the guide part 31e, and the holding part 23 of the traverse means 2 and the receiving part 81 of the object to be transported are positioned, so that the work of transferring the object to be transported between the traverse means 2 and the hanging means 3 can be performed quickly.
During the lifting process, a tensile force acts on the sling 33 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 process is a process in which the lateral travel means 2 holds the transport object, and the transport object suspended by the suspension means 3 is handed over to the lateral travel means 2. In the lateral travel preparation process, the lock pin 236 of the lateral travel means 2 is advanced and inserted into the engagement hole 811 of the receiving portion 81 of the suspension jig 8 (see FIG. 11(c)), and then the sling 33 is loosened.
When the sling 33 is loosened, the weight of the transported object acts on the traverse means 2, and the sling 33 of the hoisting means 3 is placed in a non-suspended state where no tensile force acts on it (the determining means 41 determines that the hoisting means 3 is in a non-suspended state), and therefore movement (traverse) of the traverse means 2 and the hoisting means 3 is permitted after the traverse preparation step. Note that when the sling 33 is loosened, the engagement between the attachment engagement portion 86 of the main body 8A of the hoisting jig 8 and the engagement recess 87c (see FIG. 8) of the attachment 8B is released.
If there is a risk that part of the object to be transported may extend beyond the working area A, the holding portion 23 of the lateral movement means 2 is moved laterally (in a direction intersecting the support rail 11) relative to the lateral movement cart 21 so that the entire object to be transported is positioned above the working area A.

The traverse process is a process of moving the traverse means 2 in the forward and backward directions. Four slings 33 are arranged around the traverse means 2, and the traverse means 2 and the slings 33 do not interfere with each other, so that the traverse means 2 can be moved swiftly after the transport object is handed over from the hoisting means 3 to the traverse means 2.
In the lateral travel process, 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.
Since the two attachments 8B are arranged parallel to the support rail 11, when the traverse means 2 is moved traversely along the support rail 11 with the hoisting means 3 stopped, the attachments 8B of the hanging jig 8 slide forward and backward relative to the main body 8A, and the attachments 8B are removed from the attachment hooks 86. By simply moving the traverse means 2 traversely along the support rail 11, the four slings 33 can be removed from the transported object, making it possible to quickly transfer the transported object between the traverse means 2 and the hoisting means 3.

After the lateral travel preparation step is completed, a rotation step for changing the orientation of the transport object may be performed before the lateral travel step is started, or during the lateral travel step. As shown in Fig. 2(a) in this embodiment, since the longitudinal dimension of the transport object is larger than the distance between the supports 12, 12 adjacent to each other on the left and right, 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 21d of the lateral travel means 2.
If there is a risk that a part of the object to be transported may protrude from the working area A during the process of changing the orientation of the object to be transported, the holding portion 23 is moved laterally (in a direction intersecting the support rail 11) relative to the rotating body 21d before rotating the rotating body 21d.
During the lateral movement and rotation processes, the holding portion 23 of the lateral movement means 2 is engaged with the receiving portion 81 for the transported object in a state in which it cannot move in the vertical direction and cannot rotate around a vertical axis, so that the transported object is less likely to shake significantly compared to when the transported object is moved lateraly while hung from a sling.

The forwarding process is a process of moving the empty lifting means 3 above the destination of the transport object (preparation area B in FIG. 1). 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 if 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 33 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 attachment 8B of the suspension jig 8 is engaged with the attachment engagement portion 86 of the main body 8A while the suspension means 3 is moved directly above the traverse means 2, and the weight of the transport object is applied to the sling 33. After that, the lock pin 236 of the traverse means 2 is retracted, and the engagement between the engagement mechanism 23b of the traverse means 2 and the receiving portion 81 of the suspension jig 8 is released.

The suspending process is a process of lowering the transport object using the suspending means 3. In the suspending process of this embodiment, the transport object suspended from the sling 33 is lowered to the loading platform 61 (see FIG. 2 ) of the transport vehicle 6. The suspending process is performed by operating the delivery section 34 of the suspending means 3.
Once the object to be transported has been placed on the loading platform 61, the main body 8A of the lifting jig 8 is removed from the deck 7, and the lifting means 3 is used to raise the main body 8A.
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. Fig. 12 is a diagram for explaining the movable mode of the support frame 1.
The method for moving the transport device of this embodiment includes a first mode change step of changing the mode of the support pedestal 1 from a fixed mode to a movable mode, a self-propelling step of self-propelling the transport device 100, and a second mode change step of 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 (traveling surface), and the movable mode is a mode in which only the traveling means 14 is in contact with the floor slab.

The first mode change process includes a first center-of-gravity shifting operation, a second center-of-gravity shifting operation, and a switching operation.
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.

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 support rails 11, 11 are lowered by operating the length adjustment mechanism (linear actuator) of the support 12 to shorten the support 12.
As shown in Fig. 12, 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 reinforcing frame 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, and the support 12 is 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. 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 Figure 12), the transport device 100 can be relocated without traveling through the work area A.

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 12, and by extending the support 12, 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 12 is length-adjustable and the reinforcing frame 16 is provided with the auxiliary pillars 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. 13 and 14, the transport device 100 is divided into units that can be mounted on a transport vehicle 6 and is carried into or out of the work site.
13A and 13B are diagrams showing a state in which the first gantry unit 1A constituting the transport device 100 is loaded onto the transport vehicle 6, where (a) is a plan view and (b) is a side view. FIG. 14 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, where (a) is a plan view and (b) is a side view.
In this embodiment, the support cradle 1 is divided into a first cradle unit 1A and a second cradle unit 1B and loaded onto a transport vehicle 6. Although not shown in the figure, the hoisting means 3 is removed from the support cradle 1 and loaded onto a transport vehicle separate from the cradle units 1A and 1B.

As shown in FIG. 13(a), when loading the first platform unit 1A onto the loading platform 61 of the transport vehicle 6, the cross beam 13A is shortened to make the width dimension of the platform unit 1A smaller than the width of the transport vehicle 6. Also, as shown in FIG. 13(b), the support body 12 is shortened to erect the first transport support leg 17A (FIG. 4A) on the loading platform 61, and the auxiliary support column 17b of the second transport support leg 17B is switched to a vertical state and erected on the loading platform 61, so that the platform unit 1A stands on the loading platform 61 by the transport support legs 17A and 17B. Since the platform unit 1A stands on its own on the loading platform 61 of the transport vehicle 6, there is no need to install a transport platform (a platform that supports the platform unit 1A) on the loading platform 61 when transporting the platform unit 1A.

14(a), when loading the second gantry unit 1B onto the loading platform 61, the front and rear cross beams 13A, 13A 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. 14(b), after shortening the support body 12, the gantry unit 1B is erected on the loading platform 61 by the four supports 12, 12, ....
In this embodiment, the power supply unit 5 is loaded onto the loading platform 61, and the frame 51 is used as a transport stand. In this case, the support rails 11, 11 are placed on the frame 51. If the frame 51 of the power supply unit 5 is used as a transport stand, there is no need to install a dedicated transport stand separately.
In this embodiment, the gantry unit 1B is loaded onto the loading platform 61 so that the lifting mechanism 18 is located on the rear side of the loading platform 61. When the gantry unit 1B is loaded onto the loading platform 61 in this orientation, an excess space is formed in front of the loading platform 61, so that the connecting girder unit 1C can be transported while connected to the front end of the gantry unit 1B.
In addition, when the mounting unit 1A is loaded onto the loading platform 61 in the opposite orientation to that shown in Figure 13 (i.e., when the mounting unit 1A is loaded so that the transport support leg 17B is positioned at the front of the loading platform 71), the connecting girder unit 1C can be transported while connected to the mounting unit 1A.

<Method of assembling the conveying device>
The transport device 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 15 to 19. Figures 15 to 19 are diagrams for explaining the method of assembling the conveying device 100.
The assembly method of this embodiment includes a first delivery step of delivering the first stand unit 1A and the second stand unit 1B to the preparation area B (FIGS. 15 and 16), a stand installation step of installing the support stand 1 in the preparation area B (FIG. 17), a second delivery step of delivering the hoisting means 3 to the preparation area B (FIG. 18(a)), a first equipment unit moving step of moving the hoisting means 3 onto the support stand 1 using a lifting mechanism 18 (FIG. 18(b)), a first equipment installation step of attaching the hoisting means 3 to the support stand 1 (FIG. 18(c)), an equipment unit pull-out step of pulling the power supply unit 5 arranged inside the support stand 1 to the outside of the support stand 1 (FIG. 19(a)), a second equipment unit moving step of moving the power supply unit 5 onto the support stand 1 using the lifting mechanism 18 (FIG. 19(b)), and a second equipment installation step of attaching the power supply unit 5 to the support stand 1 (FIG. 19(c)).

The following explanation will be given as an example of a case where the deck of a two-lane road bridge is to be replaced in the left lane L. In Figures 15 to 19, a road for carrying in materials and equipment is provided in the right lane R, and a work area A (not shown) and a preparation area B are provided in the left lane L. In addition, behind the work area A, there is provided the preparation area B and an entrance/exit C for transport vehicles.
In this embodiment, the transport vehicle 6 carrying the second gantry unit 1B arrives, and then the transport vehicle 6 carrying the first gantry unit 1A arrives. In the following description, the transport vehicle carrying the second gantry unit 1B may be referred to as the "first-arriving transport vehicle," and the transport vehicle carrying the first gantry unit 1A may be referred to as the "last-arriving transport vehicle."

1. First Carry-In Process In the first carry-in process, as shown in Fig. 15(a), first, the second platform unit 1B loaded on the loading platform 61 of the first-arrival transport vehicle 6 is carried into the work site. Specifically, the first-arrival transport vehicle 6 carrying the second platform unit 1B is caused to enter the preparation area B, and the first-arrival transport vehicle 6 is stopped so that the work area A (not shown) is located in front of the first-arrival transport vehicle 6. The first-arrival transport vehicle 6 traveling in the right lane R is caused to enter the preparation area B in the left lane L facing forward from the entrance/exit C, and then retreats to the rear of the entrance/exit C.
Next, as shown in Fig. 15(b), the reinforcing structures 16, 16 are moved toward the side of the loading platform 61 to widen the second mounting unit 1B. In this embodiment, the frame 51 (see Fig. 14(b)) of the power supply unit 5 is used as a transport platform for the mounting unit 1B, and the support body 12 is floating above the loading platform 61, so that the reinforcing structure 16 can be moved to the side. When the reinforcing structure 16 is moved to the side, the girder protrusion 13a of the first cross beam 13A is pulled out from the girder main body 13b.

15(c), the second frame unit 1B is unloaded from the first-arrival transport vehicle 6. Specifically, the supports 12 are extended and brought into contact with the floor slab (running surface).
The power supply unit 5 is suspended from a trolley or the like that can run on the support rail 11 .
Thereafter, the support 12 is further extended to lift the second stand unit 1B and the power supply unit 5 off the platform 61.
After the platform unit 1B and the power supply unit 5 are lifted off the loading platform 61, the first-arriving transport vehicle 6 is made to exit through the entrance C.

16(a), the first platform unit 1A loaded on the loading platform 61 of the trailing transport vehicle 6 is carried into the work site. Specifically, the trailing transport vehicle 6 carrying the first platform unit 1A is caused to enter the preparation area B, and the trailing transport vehicle 6 is stopped so that the work area A (not shown) is located in front of the trailing transport vehicle 6 and the second platform unit 1B is located behind the trailing transport vehicle 6. The trailing transport vehicle 6 traveling in the right lane R is caused to enter the preparation area B of the left lane L facing forward from the entrance/exit C, and then retreats to the rear of the entrance/exit C.
16(b), the girder extension portion 13a housed in the girder main body portion 13b of the first cross beam 13A is pulled out, and the support body 12 is positioned to the side of the loading platform 61.
In addition, the loading support leg 15 stored in the pedestal unit 1A is changed to a configuration for use. Specifically, the bracket 15a stored in the third cross beam 13C is pulled out, and the auxiliary support column 15c at the end of the bracket 15a is rotated about the horizontal axis so that the auxiliary support column 15c is aligned vertically to the side of the loading platform 61.

Thereafter, as shown in FIG. 16(c), the support body 12 and the auxiliary support column 15c are extended, and when the lower ends of the support body 12 and the auxiliary support column 15c contact the floor slab (the running surface of the transport vehicle 6), the support body 12 and the auxiliary support column 15c are further extended to raise the mounting unit 1A above the loading platform 61.
After the platform unit 1A is lifted off the loading platform 61, the following transport vehicle 6 is caused to exit through the entrance C.
By transporting the mounting units 1A, 1B using the procedure described above, the mounting units 1A, 1B can be transported smoothly even in cases where space cannot be secured to turn the transport vehicle 6, such as when carrying out deck renewal work on an existing road bridge while maintaining lane restrictions.

2. Mount Installation Step In the mount installation step, first, the overall height of the first mount unit 1A and the second mount unit 1B is lowered as shown in FIG.
Specifically, in the first gantry unit 1A, the support 12 and the auxiliary column 15c are contracted to lower the overall height of the gantry unit 1A. In the second gantry unit 1B, the support 12 is contracted and the auxiliary column 16c is extended, so that the weight of the gantry unit 1B is transferred from the support 12 to the traveling means 14.

Subsequently, as shown in FIG. 17(b), the second gantry unit 1B is self-propelled by the traveling means 14 to a position adjacent to the first gantry unit 1A.
Next, the connecting rail portion 11C of the connecting girder unit 1C, which is previously connected to the pedestal unit 1B, is connected to the working side rail portions 11A, 11A (see FIG. 1) of the pedestal unit 1A, and the pedestal units 1A, 1B are connected via the connecting girder unit 1C. After that, the loading support leg 15 is switched to the stored state, and the support pedestal 1 is formed.
After the above-mentioned operations, the support stand 1 formed by connecting one end of the first stand unit 1A and one end of the second stand unit 1B is installed in the preparation area B.

Next, the equipment units (the traverse means 2, the power supply unit 5, and the lifting jig 8) previously mounted on the support cradle 1 are collected in the second cradle unit 1B, and the center of gravity of the transport device 100 is moved into the cradle unit 1B. Furthermore, the support body 12 of the first cradle unit 1A is contracted, and the support cradle 1 is supported only by the four traveling means 14 (see FIG. 12).
Thereafter, the support stand 1 is moved (self-propelled) toward the work area A.
17(c), the support cradle 1 is moved to the front of the entrance C, and the first cradle unit 1A is positioned in the work area A. After the support cradle 1 is moved to a predetermined position, the support body 12 is extended and the auxiliary pillar 16c is retracted, and the weight of the support cradle 1 is transferred from the traveling means 14 to the support body 12. In addition, the rotating frame 18b of the lifting mechanism 18 is rotated upward and positioned between the first position and the second position. The power supply unit 5 is moved along the support rails 11 toward the first cradle unit 1A.

18(a), first, the lifting means 3 is delivered to the work site. Specifically, the equipment transport vehicle 6 carrying the lifting means 3 is caused to enter the preparation area B and then driven forward toward the support frame 1. The equipment transport vehicle 6 is then stopped so that the lifting means 3 on the equipment transport vehicle 6 is positioned below the lifting mechanism 18.
The first-arriving transport vehicle 6 traveling in the right lane R is caused to enter the preparation area B in the left lane L facing forward from the entrance C, and the front of the first-arriving transport vehicle 6 is caused to enter the internal space of the support frame 1. The lifting means 3 on the loading platform 61 is positioned below the rotating frame 18b of the lifting mechanism 18. Thereafter, although not shown, a chain block or the like is interposed between the support beam 182 (see FIG. 4B ) of the rotating frame 18b and the lifting means 3.
By transporting the lifting means 3 using the procedure described above, the lifting means 3 can be transported smoothly even in cases where space cannot be secured to turn the transport vehicle 6, such as when carrying out deck renewal work on an existing road bridge while maintaining lane restrictions.

4. First Equipment Unit Moving Process In the first equipment unit moving process, as shown in Fig. 18(b), the lifting mechanism 18 is used to move the hoisting means 3 onto the support frame 1. In this embodiment, as shown in Fig. 4B, the arms 181, 181 are raised using the pulling means 18c connected to the left and right arms 181, 181, to rotate the rotating frame 18b upward. When the rotating frame 18b is rotated upward, the hoisting means 3 is lifted upward. The rotating frame 18b is rotated until at least a part of the hoisting means 3 is located above the support frame 1.
Since the rotating frame 18b has a gate shape and the suspending means 3 can be suspended between the left and right arms 181, 181, the rotating frame 18b can be raised to a position higher than the support shaft 18a without making the arms 181 long.

5. First Equipment Installation Step In the first equipment installation step, the suspending means 3 is attached to the support frame 1 as shown in FIG.
Specifically, first, the suspending means 3 is lowered toward the support rails 11, 11 using a chain block or the like interposed between the suspending means 3 and the support beam 182 (see FIG. 4B ). Once at least a portion of the suspending means 3 is placed on the support rails 11, 11, the chain block connected to the suspending means 3 is loosened while the suspending means 3 is moved forward until the entire suspending means 3 is placed on the support rails 11, 11.

19(a), the power supply unit 5 arranged inside the support stand 1 is pulled out to the outside of the support stand 1 and positioned below the rotating frame 18b. In this embodiment, the power supply unit 5 is suspended from a trolley that can run on the support rails 11, so that the power supply unit 5 can be easily moved.
Thereafter, the chain block or the like attached to the rotating frame 18 b is connected to the power supply unit 5 .

7. Second Equipment Unit Moving Process In the second equipment unit moving process, the power supply unit 5 is moved upward using the lifting mechanism 18. Specifically, as shown in FIG. 4B, the arms 181, 181 are raised using the pulling means 18c connected to the left and right arms 181, 181, thereby rotating the rotating frame 18b of the lifting mechanism 18 upward. When the rotating frame 18b is rotated upward, the power supply unit 5 is lifted upward. As shown in FIG. 2B, when the leg 51d on the support stand 1 side of the power supply unit 5 reaches the same height as the support rails 11, 11, the rotation of the rotating frame 18b is stopped.

8. Second Equipment Installation Step In the second equipment installation step, the power supply unit 5 is installed on the support frame 1 (see FIG. 19(c)).
In this embodiment, the legs 51d of the power supply unit 5 are fixed to the ends of the support rails 11, 11. The tensioning means 18c, 18c connected to the left and right arms 181, 181 are left as they are.

The assembly procedure for the transport device 100 shown in Figures 15 to 19 is a procedure for when an entrance/exit C for the transport vehicle is provided behind the work area A, but may be modified as appropriate.
For example, the first carry-in process and the second carry-in process in the case where an entrance/exit C for transport vehicles is provided in front of the work area A are as shown in FIG.
20, a transport vehicle 6 carrying a first gantry unit 1A arrives, and then a transport vehicle 6 carrying a second gantry unit 1B arrives. In the following description, the transport vehicle carrying the first gantry unit 1A is referred to as the "first-arriving transport vehicle," and the transport vehicle 6 carrying the second gantry unit 1B is referred to as the "last-arriving transport vehicle."

In the first loading process when an entrance/exit C for the transport vehicle is provided in front of the work area A, first, the first-arriving transport vehicle 6 loaded with the first mounting unit 1A is caused to enter the preparation area B and then, as shown in Figure 20 (a), reverses toward the work area A and stops the first-arriving transport vehicle 6 so that it is positioned in the preparation area B near the work area A or within the work area A.
Thereafter, the first platform unit 1A is unloaded from the first-arrival transport vehicle 6, and the first-arrival transport vehicle 6 is caused to exit the preparation area B.

Next, as shown in Figure 20 (b), the trailing transport vehicle 6 carrying the second platform unit 1B is caused to enter the preparation area B and reverse toward the first platform unit 1A, and the trailing transport vehicle 6 is stopped so that the first platform unit 1A is positioned behind the trailing transport vehicle 6.
Thereafter, the second platform unit 1B is unloaded from the subsequent transport vehicle 6, and the subsequent transport vehicle 6 is caused to exit the preparation area B.

Subsequently, as shown in FIG. 20(c), the second gantry unit 1B is self-propelled by the traveling means 14 to a position adjacent to the first gantry unit 1A.
Next, the connecting rail portion 11C of the connecting girder unit 1C, which is previously connected to the pedestal unit 1A, is connected to the preparation side rail portions 11B, 11B (see FIG. 1) of the pedestal unit 1B, and the pedestal units 1A, 1B are connected via the connecting girder unit 1C. After that, the loading support legs 15 are switched to the stored state, and the support pedestal 1 is formed.

In the second loading process when an entrance/exit C for the transport vehicle is provided in front of the work area A, although not shown in the figure, the equipment transport vehicle 6 loaded with the lifting means 3 is allowed to enter the preparation area B and then reversed toward the support stand 1, and the equipment transport vehicle 6 is stopped so that the lifting means 3 on the equipment transport vehicle 6 is positioned below the lifting mechanism 18.
By transporting the mounting units 1A, 1B using the procedure described above, the mounting units 1A, 1B can be transported smoothly even in cases where space cannot be secured to turn the transport vehicle 6, such as when carrying out deck renewal work on an existing road bridge while maintaining lane restrictions.

<Method of dismantling the transport device>
The transport device 100 can be dismantled (disassembled) without the use of a crane truck.
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 (the lifting means 3 and the power supply unit 5) from the transport device 100 using the support stand 1 and the transport vehicle 6.
In the equipment disassembly process, first, the power supply unit 5 is removed from the support stand 1 using the lifting mechanism 18. The removed power supply unit 5 is suspended from the support rail 11 using a trolley or the like and moved to the first stand unit 1A side.
Next, at least a portion of the loading platform 61 of the transport vehicle 6 is inserted into the internal space of the support frame 1 .
Thereafter, the lifting means 3 is removed from the support stand 1 using the lifting mechanism 18 and loaded onto the loading platform 61 .
After the transport vehicle 6 has left the internal space of the support stand 1, the power supply unit 5 is moved to the second stand unit 1B side.

The gantry disassembly process includes a separation operation for disconnecting the gantry units 1A, 1B, a loading operation for loading the gantry units 1A, 1B onto the loading platform 61 of the transport vehicle 6, and a width reduction operation for narrowing the width of the support gantry 1.
In the separation work, first, the loading support legs 15 stored in the frame unit 1A are changed to the configuration for use. Then, the connection between the connecting girder unit 1C and the first frame unit 1A (or the second frame unit 1B) is released.
In the loading operation of the first rack unit 1A, first, the support body 12 is extended to form a space below the support rail 11 into which the loading platform 61 of the transport vehicle 6 can enter. Then, the loading platform 61 of the transport vehicle 6 is caused to enter below the support rail 11.
When the transport vehicle 6 is stopped at a predetermined position, the transport support leg 17B is changed to a configuration for use. Then, the support body 12 and the load handling support leg 15 are retracted, and the transport support legs 17A and 17B are erected on the loading platform 61. The support body 12 and the load handling support leg 15 are retracted until their lower ends are higher than the upper surface of the loading platform 61.

Thereafter, the first cross beam 13A is retracted to narrow the width of the frame unit 1A. After the loading support legs 15 are stored, the transport vehicle 6 is caused to exit.
In the loading operation of the second stand unit 1B, first, the support 12 is extended to form a space below the power supply unit 5 into which the loading platform 61 of the transport vehicle 6 can enter. In addition, the lifting mechanism 18 is rotated downward to be aligned with the support 12. Thereafter, the loading platform 61 of the transport vehicle 6 is moved below the support rail 11.
After the transport vehicle 6 is stopped at a predetermined position, the support body 12 is retracted and the power supply unit 5 is placed on the loading platform 61. The support body 12 is retracted until the lower end portion is positioned higher than the upper surface of the loading platform 61.
Thereafter, the first cross beam 13A is retracted to narrow the width of the frame unit 1B, and the transport vehicle 6 is then caused to exit.

<Function and effect of the conveying device>
The conveying device 100 does not simply move the object to be conveyed suspended by the sling 33 of the suspending means 3 laterally, but delivers the object to be conveyed suspended by the suspending means 3 to the traversing means 2, and then moves the object to be conveyed 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 truck.
(4) The equipment unit can be attached to and detached from the support frame 1 without using a crane truck.
(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 while not suspended by the sling 33, large shaking during lateral movement can be suppressed compared to when the object is moved laterally while still suspended by the sling 33.
(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.
(9) Since the holding unit 23 holding the object to be transported can be moved laterally relative to the lateral travelling cart 21, it is possible to prevent a portion of the object to be transported held by the holding unit 23 from protruding from the working area A.
(10) Since the holding portion 23 of the traverse means 2 engages with the receiving portion 81 for the object to be transported in a state in which it cannot move in the vertical direction and cannot rotate around a vertical axis, large shaking during traverse can be suppressed compared to when the object to be transported is traversed while hung from a sling.
(11) Since the extension length of the four slings 33 can be adjusted individually, even if the object to be transported is tilted three-dimensionally due to an eccentricity of the center of gravity of the deck slab 7, the posture of the lifted object to be transported can be corrected to one that makes it easy to transfer it to the traverse means 2, thereby making it possible to efficiently transfer cargo between the traverse means 2 and the lifting means 3.
(12) Since the equipment unit (the lifting means 3, the power supply unit 5) supported on the support stand 1 can be raised and lowered by the lifting mechanism 18 provided on the support stand 1, the equipment unit can be attached to the support stand 1 without using a crane truck.

100 Conveying equipment (construction equipment)
REFERENCE SIGNS LIST 1 Support stand 1A Stand unit 1B Stand unit 1C Connecting girder unit 11 Support rail 11A Working side rail section 11B Preparation side rail section 11C Connecting rail section 12 Support body 13A First cross girder 14 Traveling means 15 Loading support leg 16 Reinforcement structure 17A, 17B Transporting support leg 18 Lifting mechanism 18a Support shaft 18b Rotating frame 18c Pulling means 181 Arm 182 Support beam 2 Traverse means (equipment unit)
21 Traverse vehicle 21a Drive wheel 21b Driven wheel 21c Traveling body 21d Swing body 21e Swing body drive source 215 Gear 218 Pinion 22 Vehicle drive source (linear actuator)
23 Holding portion 23b Engagement mechanism 232 Storage portion 232c Tapered portion 235 Driving source (linear actuator)
236 Lock pin 24 Drive source for holding part 3 Suspension means (equipment unit)
31 Lifting cart 31a Drive wheel 31b Driven wheel 31e Guide unit 32 Carriage drive source 33 Sling 34 Feed unit 4 Control device 5 Power supply unit (equipment unit)
51 Frame 52 Generator 6 Transport vehicle 61 Cargo platform 7 Floor slab (transport object)
8. Hanging jig (for transported object)
8A Main body 81 Receiving portion 81a Cylinder portion 811 Engagement hole 82 Frame 83 Guide rail 84 Fixing portion 8B Attachment 88 Sling connection portion 89 Positioning portion A Work area B Preparation area C Entrance/exit

Claims (2)

A support stand;
A traverse means supported by the support frame;
a lifting means for lifting an object toward the traverse means;
the traverse means has a traverse carriage capable of moving along a support rail provided on the support frame and a holding part capable of holding the object, and is capable of moving along the support rail in a state in which the object that is not suspended by the suspension means is held by the holding part,
The traverse vehicle includes a running body having wheels that run on the support rail, and a rotating body supported by the running body,
The rotating body is rotatable around an axis in a vertical direction,
A conveying device characterized in that the holding portion is supported by the rotating body and is slidable relative to the rotating body in a direction intersecting the axis. The traverse means is disposed below the support rail,
2. The conveying apparatus according to claim 1 , wherein the suspending means is disposed above the support rail.

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