JP7045936B2 - Hanger unit in deck erection machine - Google Patents

Description

The present invention relates to a hanger unit in a floor slab erection machine used in a floor slab replacement work for an existing bridge.

Conventionally, floor slabs have been erected on bridges using large heavy machinery such as truck cranes, gantry cranes, and jib cranes.
However, when erection work is carried out with a large heavy machine, it may be difficult to transport the deck to the erection site in a truss bridge or tunnel with ceiling restrictions.
Further, depending on the load capacity of the deck, the weight of the large heavy machine installed on the deck may be limited.
Therefore, nowadays, the old floor slab on the girder can be easily removed without using a large heavy machine, and then the new floor slab can be easily installed, and in any place (for example, in a tunnel). There is a demand for a floor slab erection machine that can be used, and in order to solve such a demand, for example, the floor slab erection machine described in Patent Document 1 has been proposed.

Japanese Unexamined Patent Publication No. 2004-300688

However, the floor slab erection machine of Patent Document 1 needs to rotate the floor slab so that it can move (run) in both the left and right legs when transporting the lifted floor slab.
However, when the floor slab is lifted, if the position of the center of gravity of the floor slab is misaligned, the floor slab tilts and is lifted in that state. Once tilted, it is extremely difficult to manually turn a deck with a weight of 10 tons or more, even if a swivel mechanism is provided.
Further, depending on the inclination, there is a possibility of interfering with the floor slab erection machine, the road, or the like.
In addition, when lifting the deck, it is difficult to accurately grasp the position of the center of gravity. Therefore, in order to lift it horizontally, it is necessary to lift it or suspend it repeatedly so that it does not tilt, which takes time and effort.
In addition, there is a risk that the deck will tilt in an unexpected direction during repeated work, which will cause the deck to move (shift).

Therefore, an object of the present invention is to install a floor slab that can be safely and quickly lifted even if the positions of the centers of gravity of the hanger unit and the floor slab are slightly different from each other, and that the floor slab can be easily swiveled by human power. The purpose is to provide a hanger unit in the machine.

The above issues are
A plane structure having a pair of left and right main girders and a plurality of cross beams arranged in a row in a row in the front-rear direction and perpendicular to the main girder between the main girders, and a pair of left and right plane structures. A leg body that supports and attaches a moving and fixing mechanism to the lower end of each, a traveling mechanism that can be moved in the front-rear direction below the planar structure, and a traveling mechanism that can be expanded and contracted in the left-right direction of the traveling mechanism. It is provided with a traversing mechanism and a hanger unit suspended below the traversing mechanism to lift a member for erection. The lower part of the tool is provided with an engaging member provided straddling each central portion of the upper part of the hanging tool and the lower part of the hanging tool, and the engaging member includes a head and a body portion having a diameter smaller than that of the head. The head was swingably supported in the center of the upper part of the hanger, the body was provided with a mounting table on the lower part so that the lower part of the hanger could be placed, and the upper part of the hanger was suspended from the traverse mechanism. String-shaped connecting members are attached at multiple points, and the lower part of the hanger has a floor slab fixed to the lower part, and a swivel ring is fixed to the upper part to enable turning even in the case of interference due to tilting during lifting. It is solved by providing a hanger unit in a featured deck erection device.

The upper portion of the mounting base of the hanging tool unit in the floor slab erection device of the present invention is formed in a convex spherical surface, and the mounting surface of the corresponding lower portion of the hanging tool is formed in a concave spherical surface. do.

Further, the upper part of the hanging tool of the hanging tool unit in the floor slab erection device of the present invention has an arm portion fixed to both end faces of the upper end of the hanging tool, and substantially both ends of each arm portion so that the vicinity of both ends can be swung. The connecting member swinging portion is provided with a shaft-supported connecting member swinging portion, and the connecting member swinging portion is characterized in that the connecting member is fixed to one side and the connecting member swinging portion is pivotally supported by the arm portion so as to be swingable on the other side.

Further, the connecting member of the hanger unit in the floor slab erection device of the present invention is characterized in that it is suspended by the traverse mechanism via a traverse trolley.

Further, the upper part of the hanger unit of the floor slab erection device of the present invention has a hanger upper side rotation restricting structure, and the hanger lower part cooperates with the hanger upper side rotation restricting structure. It is characterized by having a hanger lower portion rotation restricting structure that regulates the rotation of the hanger lower portion with respect to the hanger upper portion when moving in the front-rear direction or the left-right direction.

According to the present invention, even if the positions of the centers of gravity of the hanger unit and the deck are slightly different from each other, the deck can be lifted safely and quickly, and the deck can be easily swiveled by human power. A hanger unit can be provided.

It is a side view of the floor slab erection machine which shows one Embodiment of this invention. It is a top view of the floor slab erection machine of FIG. It is AA arrow view of the floor slab erection machine of FIG. FIG. 2 is a detailed enlarged view of part D when FIG. 2 is viewed in the front-rear direction. It is a BB arrow view of FIG. It is a detailed enlarged view of the traveling beam of FIG. It is the figure which showed the traversing motion at the time of removal of a deck. It is a top view of the hanger unit. It is a CC arrow view of the hanger unit of FIG. It is a side view of a part of the traversing mechanism and the hanger unit of FIG. It is a transport operation diagram of a deck.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the following description is merely an example and does not limit the present invention, its application or its use.

A preferred embodiment of the floor slab erection machine of the present invention will be described more specifically with reference to the drawings.
When indicating the direction in the explanation, unless otherwise specified, the side where the deck erection machine transports the deck to the waste carrier is "front", while the opposite side is "rear", and the deck erection machine. The direction of movement along the traveling rail extending in front of and behind the vehicle is defined as the "front-rear direction". Further, the direction orthogonal to the traveling rail is defined as "left-right direction", "traverse direction", or "width direction". Further, the direction in which the hanging tool unit lifts or hangs the floor slab is defined as the "vertical direction".

1 is a side view of a floor slab erection machine showing an embodiment of the present invention, FIG. 2 is a plan view of the floor slab erection machine of FIG. 1, and FIG. 3 is an arrow view of AA of the floor slab erection machine of FIG. It is a figure.

The floor slab erection machine 3 of the present embodiment replaces the erection member (hereinafter referred to as floor slab 2) constituting the road surface in the existing bridge (removal of the old floor slab and installation of a new floor slab to replace it). )I do.

In FIG. 1, the bridge girder 1 of a bridge is made of H-shaped steel or the like and extends in the front-rear direction, and a floor slab 2 of a predetermined size is arranged above the bridge girder 1. Further, the pitch interval of the bridge girder 1 in the left-right direction is generally 3 m or 6 m.

The floor slab 2 is made of precast concrete with reinforcing bars, and its longitudinal direction (long side) is oriented in the left-right direction orthogonal to the front-rear direction, and the road surface is constructed by arranging them in rows in the front-rear direction. There is.

Such a floor slab 2 may be required to be replaced (removal of the old floor slab and installation of a new floor slab) due to deterioration over time such as corrosion, peeling, or cracking due to long-term use.
In such removal of the old floor slab, generally, the old floor slab is transported to the treatment plant by a waste carrier of a 10-ton vehicle or the like.
Therefore, the length of the old deck is usually cut to a size of 2 m so that it can be transported to a 10-ton vehicle, and the length in the left-right direction is further divided into two to reduce the weight to 10 tons or less. ..

The floor slab erection machine 3 of the present embodiment replaces the floor slab 2 in such a case, and as shown in FIG. 1, the floor slab erection machine 3 cannot be moved after being moved to the replacement place. It is placed on the floor slab 2 and the old floor slab is removed (loading work) to a waste carrier or the like by the hanging tool unit 11.

Then, after repeating the work a plurality of times (14 times in this embodiment), the waste carrier and the like carry out the removed floor slabs together to the treatment plant. After that, by installing the new floor slab carried in by the trailer multiple times (7 times in this embodiment), the floor slab 2 can be replaced (removal of the old floor slab and installation of a new floor slab to replace it). It will be completed.

<Structure of floor slab erection machine>
The floor slab erection machine 3 is mainly composed of a plane structure 6 including a main girder 4 and a cross beam 5, a leg body 7, a moving fixing mechanism 8, a traveling mechanism 9, a traversing mechanism 10, a hanger unit 11, and the like. ing.

The main girder 4 is made of a member such as a square tube or a steel plate, and has a pair of left and right lines extending in the front-rear direction. Further, at the lower part of each main girder 4, traveling rails 14 for making the traveling trolley 15 described later movable back and forth are laid respectively.

Each traveling rail 14 is provided so as to extend slightly from the front and rear ends of the main girder 4, and can accommodate the cable of the traveling trolley 15.

The cross beam 5 is made of a member such as a square pipe or a steel plate, is provided vertically between the cross beam 5 and each main girder 4, and both ends thereof are connected by welding. Then, a plurality of lines (five lines in this embodiment) are provided in a row in the front-rear direction.
That is, the planar structure 6 is configured to be an integral structure by the pair of left and right main girders 4 and the cross beams 5 connected to each main girder 4.

The leg 7 is made of a member such as a steel plate, and the planar structure 6 is supported by a pair of left and right pairs (two pairs in the front and rear in the present embodiment) by welding. Further, a moving fixing mechanism 8 is attached to the lower end of each leg body 7.

Further, as shown in FIG. 2, the distance between the front and rear legs 7 may be set larger than the floor slab rotation range R of the new floor slab to be installed.
Further, although not shown, each leg 7 is provided with a telescopic structure for adjusting the vertical length of the leg so that the floor slab erection machine 3 can be maintained at a horizontal level according to the road shape and the like. Has been done.

The moving fixing mechanism 8 includes a plurality of wheels 12 (two in this embodiment) and a jack-up device 13, and when the wheels 12 are rotated, the jack-up device 13 is turned off (contracted), while the jack-up device 13 is turned off (shrinked). When the wheel 12 is made immovable (immovable), the jack-up device 13 is turned on (extended) so that the wheel 12 is floated and fixed.

By the way, although the floor slab 2 is supported by the above-mentioned bridge girder 1, it is difficult in terms of strength to support the floor slab erection machine 3 only by the thin floor slab 2. Therefore, in general, the place where the load of the floor slab erection machine 3 is applied is arranged in the vicinity of the bridge girder 1. That is, the pair of left and right moving and fixing mechanisms 8 of the present embodiment are provided so as to have substantially the same interval as the pitch interval of the bridge girder 1 (6 m in the present embodiment), and fixing is performed on the bridge girder 1. I am doing it.

The traveling mechanism 9 is attached below the planar structure 6 so as to be movable in the front-rear direction.
FIG. 4 is a detailed enlarged view of the D portion when FIG. 2 is viewed in the front-rear direction, and for convenience, the main girder 4 is omitted in explaining the traveling mechanism 9.

<Structure of traveling mechanism>
As shown in FIG. 4, the traveling mechanism 9 is mainly composed of a traveling trolley 15, a traveling beam 16, and the like.

Two traveling trolleys 15 are attached to each traveling rail 14 so as to be movable back and forth. Further, the pair of front and rear traveling trolleys 15 are configured to be integrally movable by a connecting material (not shown). Here, the distance between the traveling trolleys 15 is determined by the length of the binder, but it may be longer than the distance between the traversing rails described later.

5 is a view taken along the arrow BB of FIG. 4, and FIG. 6 is a detailed enlarged view of the traveling beam of FIG.
As shown in FIGS. 5 and 6, the traveling beam 16 has a steel plate combination structure and has a concave cross section. Then, they are attached to each traveling trolley 15 so as to be arranged in a row in the front-rear direction and perpendicular to the traveling rail 14 with the opening having a concave cross section facing down.

As a result, the pair of front and rear traveling beams 16 are suspended on the traveling rail 14 via the traveling trolley 15, respectively.
Therefore, since each traveling beam 16 is attached to each traveling trolley 15 integrally configured in the front-rear direction, each traveling beam 16 and each traveling trolley 15 can be integrally moved in the front-rear direction. ..

That is, the traveling mechanism 9 including the traveling beam 16 and the traveling trolley 15 can be integrally moved in the front-rear direction along the traveling rail 14.

The traversing mechanism 10 is attached below the planar structure 6 so as to be expandable and contractible in the left-right direction with respect to the planar structure 6.

<Structure of traversing mechanism>
The traversing mechanism 10 is mainly composed of an upper roller 17, a lower roller 18, a traversing beam 19, a traversing rail 20, and the like.

The lower roller 18 has a columnar shape, and is continuously provided in the left-right direction on the lower side of both inner side surfaces having a concave cross section of each traveling beam 16 and in a state of being rotatable around its own center. There is.

The upper roller 17 has a columnar shape having a smaller diameter than the lower roller 18, and is provided facing the upper side of each lower roller 18 so as to slidably sandwich the transverse beam 19.

The transverse beam 19 is a beam made of H-shaped steel or the like, and is slidably supported between a pair of upper and lower rollers 17 and 18 provided on the traveling beam 16 so as to be able to expand and contract (move) in the left-right direction. ..
Further, each transverse beam 19 is integrally formed into a frame shape by a pair of left and right connecting members 21. The transverse beam 19 can be expanded and contracted in the left-right direction by the transverse drive mechanism 22 described later.

The traverse rail 20 is made of a member such as I-shaped steel, and is provided in pairs at the upper part of the traverse beam 19 and between the traversing beams 19 in parallel with the traversing beam 19 at a predetermined interval.
Further, each traversing rail 20 is integrally formed into a frame shape by a pair of left and right connecting materials 32.

Both ends of each traversing rail 20 are fixed to the connecting member 21 of the traversing beam 19 via the bundle member 33 so as to be vertically integrated with each other.

That is, the transverse beam 19 and the transverse rail 20 are integrally fixed in the vertical direction, and can be integrally expanded and contracted in the horizontal direction along a pair of upper and lower rollers 17 and 18 provided on the traveling beam 16. It has become.

Further, a pair of left and right traversing trolleys 34 are attached to each traversing rail 20 so as to be movable in the left-right direction. Then, the chain block 35 is suspended from the traversing rail 20 via each traversing trolley 34. That is, the four chain blocks 35 provided on the front, back, left and right are used to lift or hang the hanging tool unit 11 described later.

Further, connecting members 34a are provided between the traversing trolleys 34 provided in the front-rear direction, whereby the traversing trolleys 34 can be moved integrally with each other.

At that time, the traverse drive of the traverse mechanism 10 may be performed manually, but preferably it is automatically performed by the traverse drive mechanism 22.
Hereinafter, the traverse drive mechanism 22 will be described with reference to FIGS. 4 to 6.

<Structure of traverse drive mechanism>
The traverse drive mechanism 22 is mainly composed of a front bearing 23, a rear bearing 24, a shaft 25, a chain sprocket 26, a first roller chain 27, a motor 28, a drive sprocket 29, a driven sprocket 30, a second roller chain 31, and the like. Has been done.

A pair of shafts 25 are provided near both left and right ends of the traveling beam 16 so as to penetrate the upper end side of the traveling beam 16 in the front-rear direction.
Front bearings 23 are fitted and attached to the front side surfaces of the traveling beam 16 which is one front side of each of the shafts 25 so that the shaft 25 can be rotatably supported.

On the other hand, rear bearings 24 are fitted and attached to the rear side surfaces of the traveling beam 16 which is the other rear side so that the shaft 25 can be rotatably supported.
Further, a chain sprocket 26 is rotationally and integrally attached to the shaft 25 at the center of each shaft in the traveling beam 16 in the front-rear direction.

Then, the first roller chains 27 are engaged with each other so as to hang each chain sprocket 26 provided in the left-right direction. The rotation of one shaft 25 is transmitted to the other shaft 25 by the first roller chain 27. Further, at this time, the first roller chain 27 is anchored to the upper surface of the transverse beam 19.

Further, of the pair of shafts 25 provided near both left and right ends, the rear side of the rear bearing 24, which is the rearmost end of the shaft 25 on the left side (here, the traveling beam 16 on the rear side is referred to as an example), is on the rear side. The driven sprocket 30 is rotationally and integrally attached to the shaft 25.

Here, the motor 28 is fixed to the left upper end surface of the traveling beam 16, and the drive sprocket 29 is rotationally and integrally attached to the rotation main shaft thereof. Then, the second roller chain 31 is engaged with each other so as to cross the drive sprocket 29 and the driven sprocket 30.

Therefore, the traversing drive mechanism 22 is transmitted to the shaft 25 via the drive sprocket 29 and the driven sprocket 30 by the drive of the motor 28, and the shaft 25 rotates to rotate the first roller chain 27 via the chain sprocket 26. Is designed to be driven. By transmitting this driving force to the transverse beam 19, the transverse mechanism 10 can be driven in the transverse direction (left-right direction).

<Hanger unit>
The hanger unit 11 is suspended below the traversing mechanism 10 to lift or hang the floor slab. In addition, it is divided in the vertical direction, and each of them has a structure that can be relatively swiveled.

Hereinafter, a detailed description will be given with reference to FIGS. 8 to 10.
8 is a plan view of the hanger unit, FIG. 9 is a CC arrow view of the hanger unit of FIG. 8, and FIG. 10 is a side view of a part of the traversing mechanism and the hanger unit of FIG. ..

In the hanger unit 11, the hanger upper portion 36 and the hanger lower portion 37 are provided in a row with a predetermined interval in the vertical direction.

The upper part 36 of the hanger is a combination structure of steel plates and has a block shape with a long side. 45 is fixed.

By the way, the above-mentioned predetermined interval varies depending on the size of the hanger unit 11 and is not particularly limited, but in the present embodiment, it is about 5 to 10 mm.
As a result, even if the position of the center of gravity of the floor slab is slightly displaced when the floor slab is lifted, the floor slab can be lifted. In addition, even if the road is inclined with respect to the width direction, it can be lifted.

Further, the hanger unit 11 is provided with an engaging member 38 straddling each of the central portions of the hanger upper portion 36 and the hanger lower portion 37.

The engaging member 38 is continuously and integrally provided with the head 38a and the body portion 38b having a diameter smaller than that of the head 38a in a state where the centers of the head 38a are aligned with each other.

The head 38a has a substantially truncated cone shape whose diameter becomes smaller as it goes upward, and is provided at a substantially central portion of the upper portion 36 of the hanger. On the other hand, the body portion 38b has a substantially columnar shape, and is provided so as to straddle each central portion of the hanging tool upper portion 36 and the hanging tool lower portion 37.

The above-mentioned upper conical roller bearing 44 and the lower conical roller bearing 45 are fitted to such an engaging member 38.
Specifically, the upper conical roller bearing 44 is fitted above the head 38a, while the lower conical roller bearing 45 is in contact with the upper part of the body 38b and the lower end surface of the head 38a. Is fitted to.

As a result, the engaging member 38 is pivotally supported by the upper conical roller bearing 44 and the lower conical roller bearing 45, and the hanger upper portion 36 is the rotation center of the head 38a relative to the engaging member 38. It can swing with o as the base point.

On the other hand, below the body portion 38b, a mounting table 39 is provided to support the lower portion 37 of the hanger so that it can be mounted.
The mounting table 39 is formed in a block shape, and the upper portion thereof is formed in a convex spherical surface 41. On the other hand, the mounting surface of the hanging tool lower portion 37 corresponding to the mounting surface is formed on the concave spherical surface 42.

By contacting the spherical surfaces with each other, even if an unreasonable force such as an eccentric load is applied to the engaging member 38, the load can be passed by following the spherical surface.

The floor slab 2 is fixed to the lower part of the hanger lower part 37, and a swivel ring 40 is fixed to the upper part so as to be able to turn even in the case of interference due to tilting at the time of lifting.

In the swivel ring 40, the inner ring 40a and the outer ring 40b are configured to be relatively rotatable, and the outer ring 40b is fixed to the upper part of the hanger lower portion 37.
Such a swivel ring 40 is generally used in heavy machinery, civil engineering machinery, precision machinery, equipment machinery, and the like, which have a large weight but require stable swivel operation.

The upper portion 36 of the hanger is fixed to both end faces in the longitudinal direction by welding or the like, and is provided with plate-shaped arm portions 43 overhanging on both sides.

Further, at substantially both ends of each arm portion 43, a connecting member swinging portion 46 pivotally supported in the vicinity of both ends is provided, and one of the connecting member swinging portions 46 is provided with a chain block 35 ( An example of the connecting member) is fixed, and the other is provided with a bearing 43a that pivotally supports the connecting member swinging portion 46 with respect to the arm portion 43.

With this configuration, the hanging tool upper portion 36 can support the load of the floor slab 2 and can be lifted or hung.

Further, the chain block 35 is suspended on the traversing rail 20 of the traversing mechanism 10 via the traversing trolley 34.

<Rotation control structure of hanger unit>
The rotation restricting structure of the hanger unit 11 includes a hanger upper side rotation restricting structure provided on the hanger upper portion 36 and a hanger lower side rotation restricting structure provided on the hanger lower portion 37.

That is, the hanger upper portion 36 has a hanger upper side rotation restricting structure, and the hanger lower portion 37 cooperates with the hanger upper side rotation restricting structure to move in the front-rear direction or the left-right direction. It has a hanger lower part rotation restricting structure that regulates the rotation of the hanger lower part 37 with respect to the hanger upper part 36.

The rotation restricting structure on the upper side of the hanger is composed of a bracket 47 having a through hole 47a, and is attached to the upper part 36 of the hanger.
On the other hand, the rotation restricting structure on the lower side of the hanger is composed of a bracket 48 having a through hole 48a having a larger diameter than the through hole 47a of the bracket 47, and when the upper part 36 of the hanger rotates every 90 degrees around the rotation center p. Four locations are provided so that the positions of the through holes 48a of the bracket 48 correspond to the positions of the through holes 47a of the bracket 47.

That is, rotation regulation is realized by inserting the step regulation pin 49 or the like in a state where the through hole 47a of the bracket 47 and the through hole 48a of the bracket 48 are aligned. Further, preferably, by inserting the snap pin into the hole penetrating in the radial direction near the end of the stepped regulation pin 49, the rotation can be regulated more reliably.

FIG. 11 is a diagram showing an operation of horizontally lifting a floor slab whose center of gravity is deviated. FIG. 11 (a) shows an example of tilting of the deck due to the deviation of the center of gravity, and FIG. 11 (b) shows an example of tilting the deck horizontally.
Hereinafter, an example of the operation of horizontally lifting and transporting the old deck whose center of gravity is displaced will be described.

<lifting and transporting operations>
When the floor slab 2 to be removed is lifted in a state where the center of gravity position g is deviated, as shown in FIG. At this time, the lower portion 37 of the hanger fixing the floor slab 2 has the same inclination.

Further, due to this inclination, the inner ring 40a of the swivel ring 40 and the lower end surface of the upper portion 36 of the hanger interfere with each other.
In such a state, the floor slab 2 cannot be safely transported, so it is necessary to hold the floor slab 2 substantially horizontally.

Therefore, first, the pair of front and rear chain blocks 35 on the left side of the front view are visually wound up so that the floor slab 2 is substantially horizontal.
At this time, the upper portion 36 of the hanger is rotated around the center of rotation o by the upper conical roller bearing 44 and the lower conical roller bearing 45, so that the upper portion 36 is in a state of rising to the left in the front view (state in FIG. 11B). ..

In this state (the floor slab 2 is substantially horizontal), the movement of the hanger upper part 36 and the hanger lower part 37 is restricted by using the rotation restricting structure of the hanger unit 11.
After that, by driving the traversing mechanism 11 and the traversing trolley 34, the hanger unit 11 is moved (horizontally moving) in the left-right direction to the positions in both leg bodies 7 of the pair of left and right leg bodies 7.

At this time, since the floor slab 2 is longer than the length between the two legs 7, if it is moved in the front-rear direction (running movement) as it is, it interferes with the pair of left and right legs 7 provided on the front side.
Therefore, it is necessary to release the restriction on the movement of the upper part 36 of the hanger and the lower part 37 of the hanger in the rotation restricting structure of the hanger unit 11 and rotate the hanger unit 11 by 90 degrees.

At this time, as described above, the upper portion 36 of the hanger and the inner ring 40a of the swivel ring 40 interfere with each other, but since the outer ring 40b is in a free state, it can be easily swiveled by human power.
After turning 90 degrees, the movement of the upper part 36 of the hanger and the lower part of the hanger 37 is restricted again by using the rotation restricting structure of the hanger unit 11, and the movement (running movement) is performed to the front side in the front-rear direction. As a result, the floor slab 2 is transported.

As described above, according to the present embodiment, the floor slab can be lifted even if the position of the center of gravity is slightly deviated, so that the time for fine adjustment of the lifting can be shortened. In addition, the labor required for it can be reduced.
In addition, the inclination of the floor slab due to the deviation of the center of gravity can be easily corrected horizontally, which makes the transportation safe and easy. In addition, it is not necessary to consider the height of the inclination due to the inclination, and the machine height can be lowered.
Further, by providing the swivel ring, even if the position of the center of gravity of the floor slab is displaced and the lower part of the hanging tool is tilted, it can be rotated manually.
Furthermore, even if the road (floor slab) is inclined, the hanger unit can be tilted according to the slope of the road (road slope) by adjusting the chain block, which makes it easy to fix the hanger unit and the floor slab. Can be done.
In addition, when installing the floor slab, the floor slab can be tilted according to the slope of the road, which facilitates the installation.

The hanger unit according to the present invention is not limited to the above-described embodiment, but also includes various other configurations.

For example, the rotation restricting structure of the hanger unit consists of a bracket provided on the upper part of the hanger, a bracket provided on the lower part of the hanger, and a stepped restricting pin for connecting the through holes provided therein. However, the present invention is not limited to this, and the bracket and the bracket to be clamped may be directly clamped.
Further, the hanger unit is suspended by a chain block, but the present invention is not limited to this, and a hoist or a strong rope may be used.
Further, bearings such as ball bearings may be arranged in an annular shape instead of the swivel ring.

2 Deck 3 Deck erection machine 4 Main girder 5 Cross beam 6 Plane structure 7 Leg body 8 Moving fixing mechanism 9 Traveling mechanism 10 Traverse mechanism 11 Suspension unit 14 Traveling rail 15 Traveling trolley 16 Traveling beam 19 Traverse beam 20 Traverse rail 22 Traverse drive mechanism 34 Traverse trolley 35 Chain block 36 Hanger upper part 37 Hanger lower part 38 Engagement member 38a Head 38b Body 39 Mounting stand 40 Swing ring 40a Inner ring 40b Outer ring 41 Convex spherical 42 Recessed spherical 43 Arm 43a Bearing 44 Upper conical roller bearing 45 Lower conical roller bearing 46 Connecting member Swinging part 47 Bracket (Example of hanger upper side rotation restricting structure)
48 Bracketed (an example of a structure that restricts rotation on the lower side of the hanger)
47a, 48a Through hole 49 Stepped regulation pin o Rotation center g Center of gravity position

Claims (5)

A pair of left and right main girders and
Multiple cross beams arranged between each main girder in a row perpendicular to the main girder and in the front-rear direction,
With a planar structure having
A leg body that supports the planar structure in a pair of left and right pairs and has a moving and fixing mechanism attached to the lower end of each.
A traveling mechanism provided below the planar structure so as to be movable in the front-rear direction,
A traversing mechanism that can be expanded and contracted in the left-right direction of the traveling mechanism,
A hanger unit suspended below the traversing mechanism to lift the erection member,
Equipped with
The hanger unit is the upper part of the hanger and
The lower part of the hanger provided at a predetermined distance from the upper part of the hanger, and the lower part of the hanger.
An engaging member provided straddling each central portion of the upper part of the hanger and the lower part of the hanger, and
Equipped with
The engaging member comprises a head and a body having a diameter smaller than that of the head.
The head is swingably supported by the central portion of the upper part of the hanger.
The body portion is provided with a mounting table on the lower portion thereof so that the lower portion of the hanger can be mounted.
On the upper part of the hanger, string-shaped connecting members suspended from the traversing mechanism are attached at a plurality of places.
The lower part of the hanging tool is a hanging tool unit in a floor slab erection device, characterized in that a floor slab is fixed to the lower part and a swivel ring is fixed to the upper part so as to be able to turn even in the case of interference due to tilting at the time of lifting.
The floor slab erection according to claim 1, wherein the upper portion of the above-mentioned stand is formed on a convex spherical surface, and the mounting surface of the lower portion of the hanging tool corresponding to the convex spherical surface is formed on the concave spherical surface. Hanger unit in the device.
The upper part of the hanger is provided with an arm portion fixed to both end surfaces of the upper part of the hanger, and a connecting member swinging portion pivotally supported at substantially both ends of each arm portion so as to be swingable in the vicinity of both ends. The floor slab erection device according to claim 1 or 2, wherein the connecting member swinging portion is fixed to one side and swingably supported by an arm portion on the other side. Hanger unit in.
The hanging tool unit in the floor slab erection device according to any one of claims 1 to 3, wherein the connecting member is suspended by the traversing mechanism via a traversing trolley.
The upper part of the hanger has a rotation restricting structure on the upper side of the hanger.
The lower part of the hanger cooperates with the rotation restricting structure on the upper side of the hanger to restrict the rotation of the lower part of the hanger with respect to the upper part of the hanger when moving in the front-rear direction or the left-right direction. The hanger unit in the floor slab erection device according to any one of claims 1 to 4, characterized in that it has a lower rotation restricting structure.

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