JP6677628B2 - Floor slab replacement device and method - Google Patents

Description

  The present invention relates to a floor slab replacement apparatus and method for replacing a slab constituting a road surface in an existing bridge (removal of an old slab and installation of a new slab in place of the old slab).

  The bridge includes a pier, a bridge girder (H-beam) extending over the plurality of piers and extending in the bridge axis direction, and a floor slab laid over the plurality of bridge girder. Be composed. The floor slab is made of precast concrete, and its longitudinal direction (long side) is oriented in a direction perpendicular to the bridge axis, and is arranged in one or two rows in the bridge axis direction to form a road surface.

  In some cases, such a slab needs to be replaced (removal of the old slab and installation of the new slab) due to corrosion of the internal reinforcing bar due to long-term use.

As a conventional floor slab replacement device (floor slab erection machine), an apparatus described in Patent Literature 1 is known.
This is a rail-free, self-propelled portal structure that connects the front and rear portal frames in the bridge axis direction, and is provided on the underside of the ceiling of the portal structure so as to be movable in the front-rear and lateral directions. (For example, a chain block).

The work of erection of the floor slab using such an erection machine,
(1) Incorporation of the floor slab at the rear of the erection machine, that is, lifting of the slab by the lifting device located at the rear of the erection machine with the long side of the slab facing the bridge axis direction ( 2) Transfer of the slab to the erection position by moving the lifting device to the front side. (3) Changing the orientation of the slab so that the long side of the slab is perpendicular to the bridge axis (rotated 90 °).
(4) Then, it is performed in a process of installation at a predetermined position.
In addition, the removal work of the existing floor slab is performed in reverse, and the process is performed in substantially the reverse order.

Japanese Patent No. 3901657

  However, in the conventional floor slab replacement device, the removal of the old slab and the installation of the new slab are alternately performed by one lifting device, so that it takes time to replace the slab. was there.

  An object of the present invention is to provide a floor slab replacement apparatus and method capable of efficiently performing floor slab replacement in view of such a situation.

The floor slab replacement device according to the present invention,
A gate-shaped structure formed by connecting the gate-shaped frames in front and behind the bridge axis direction,
Two sets of rails arranged in the direction of the bridge axis along the ceiling of the portal structure;
A first slab suspended from one set of rails and capable of moving to the replacement position by lifting the new slab at the loading / unloading position set in a position away from the replacement position of the floor slab in the bridge axis direction. Lifting equipment,
A second lifting device suspended on the other set of rails and lifting the old floor slab at the replacement position, and movable to the loading / unloading position;
A rotation mechanism provided in each of the first and second lifting devices and capable of changing the direction by rotating the lifted floor slab in a horizontal plane;
Is composed of
The first and second lifting devices are configured so that they can pass each other in the bridge axis direction in a state where the floor slabs are lifted.

The method for replacing a floor slab according to the present invention includes:
At the loading / unloading position set in a position away from the replacement position of the slab in the bridge axis direction, the first slab is used to suspend the new slab in a state where the longitudinal direction is in the bridge axis direction. Loading process,
A removing step of lifting the old slab by the second lifting device at the replacement position;
The first lifting device and the second lifting device are moved so as to pass each other in the bridge axis direction in opposite directions, and the new floor slab is moved to the replacement position side and the old floor slab is loaded. A passing process of moving relatively to the unloading position side,
An installation step of rotating the new floor slab moved to the replacement position by the first lifting device in a horizontal plane so that the longitudinal direction thereof is perpendicular to the bridge axis, and suspended and installed;
After lifting by the second lifting device, before or after the passing step, the old floor slab is rotated in a horizontal plane and its longitudinal direction is directed to the bridge axis direction. An unloading process of hanging down the old slab moved to the loading / unloading position and unloading it,
It is characterized by including.

  According to the present invention, by using two lifting devices that can pass each other in the bridge axis direction, the floor slab can be moved from the loading / unloading position to the replacement position and from the replacement position to the loading / unloading position. Can be performed simultaneously. Therefore, the work of loading / installing the new slab and the work of removing / unloading the old slab can be performed in parallel, and the effect of efficiently replacing the slab can be achieved.

Side view of the floor slab replacement device according to one embodiment of the present invention in a process of loading a new slab and removing an old slab (a view in a direction perpendicular to the bridge axis). Plan view corresponding to FIG. Front view corresponding to Fig. 1 (view in the bridge axis direction) Side view of the same floor slab changer in the same process as the old and new slabs Front view corresponding to FIG. Side view of the same floor slab replacement system during the installation of the new slab and the removal of the old slab Front view corresponding to FIG. Illustration of the loading process of the new deck Illustration of removal process of old slab Illustration of the installation process of the new floor slab Illustration of unloading process of old slab

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view (viewed in a direction perpendicular to the bridge axis) of a floor slab replacement device according to an embodiment of the present invention, FIG. 2 is a plan view corresponding to FIG. 1, and FIG. 3 is a front view corresponding to FIG. It is a figure (view seen in the bridge axis direction).

  In the present embodiment, the new floor slab S1 is different from the old floor slab S2 in that the wall sill K1 is integrally provided at both ends in the longitudinal direction. The new floor slab S1 is integrally provided with a suspension piece (stud bolt) B1 protruding from the upper surface in order to facilitate the lifting operation.

The floor slab replacement device of the present embodiment is a self-propelled type, and is hereinafter referred to as a “slab slab replacement machine”.
The main body of the floor slab changer 100 is a portal structure 1, and a pair of left and right main frames 3 connecting upper portions of the front and rear portal frames 2, 2 in the bridge axis direction. , And 3. In the present embodiment, two front and rear portal frames 2 and 2 are provided, but three or more portal frames may be provided. However, the work of replacing the two gantry frames 2 is performed, and the floor slab can be rotated. FIG. 2 shows the rotational position and range of the floor slab by dotted lines.

Here, each portal frame 2 is composed of a horizontal frame 2a at the center and legs 2b and 2b of inverted L shape attached to both ends thereof.
A caster unit 4 as a traveling device is attached to the lower end of each leg 2b so as to be rotatable around the axis of each leg 2b. Each caster unit 4 includes a plurality of motor-driven tire wheels 5. Can be
Therefore, the portal structure 1 is provided with a traveling device (caster unit 4) that can travel on a road surface by the tire wheels 5 on the leg 2 b of the portal frame 2.

  Accordingly, the floor slab changer 100 is a self-propelled vehicle of a railless type (a system that does not require rails or the like), and travels on a general road to be mounted on a bridge at a work site (on an existing floor slab). You can stop.

  The caster unit 4 is also provided with a jack 6. The jack 6 is stored while the floor slab changer 100 is running with the tire wheels 5, stops at a working position, and then extends to lift the tire wheels 5 from the road surface, thereby causing the floor slab changer 100 to move. It can be safely fixed on the road surface.

In the portal frame 2, the left and right inverted L-shaped legs 2b, 2b are slidably attached to the center horizontal frame 2a, and the legs 2b, 2b from the horizontal frame 2a. Can be changed in the direction perpendicular to the bridge axis (the width direction of the bridge). FIG. 3 shows the legs 2b and 2b in the minimum width state and the maximum width state.
Therefore, in the portal structure 1, the leg 2b of the portal frame 2 is provided so as to be position adjustable in the direction perpendicular to the bridge axis, and has a width adjusting function. Such a width adjustment function is useful when a position where a load can be applied in the width direction of the bridge is restricted.

  The floor slab changer 100 also includes two sets of rails 7 and 8 that are arranged in the bridge axis direction along the ceiling of the portal type structure 1 including the main frame 3 and the like, and one set of the rails 7 and 8. It comprises a first lifting device 10 suspended on the rails 7 and a second lifting device 20 suspended on the other set of rails 8.

The two rails 7 and 8 are provided two by two, and the two rails 7 and 7 for the first lifting device 10 have a relatively narrow width and are located at the center in the width direction of the portal structure 1. The two rails 8 provided for the second lifting device 20 are provided at both ends in the width direction of the portal structure 1 with a relatively wide width.
Therefore, the two rails 8 for the second lifting device 20 are arranged so as to sandwich the two rails 7 for the first lifting device 10 therebetween.

  The first lifting device 10 is used for loading / installing the new floor slab S1. The first lifting device 10 is suspended by two front and rear rails on each of the two left and right rails 7 and 7 and is movable along the respective rails 7 and 7. Two pairs (a total of four) of the chain blocks 11 are interposed between the upper suspension member and the lower suspension member below the chain block 11 so that the lower suspension member is rotatable in a horizontal plane. It includes a rotating mechanism 12 and a hanging balance 13 provided as a lower hanging member.

  The hanging balance 13 is provided with arms 13a that can protrude from both ends thereof, and these arms 13a are engaged with the hanging pieces B1 that are embedded in the new floor slab S1 and protrude from the upper surface, thereby forming the new floor slab S1. Enables lifting.

  The second lifting device 20 is used for removing and carrying out the old floor slab S2, and is suspended by two front and rear rails on each of the two left and right rails 8 and 8 and is movable left and right along each of the rails 8 and 8. Two pairs (a total of four) of the chain blocks 21 and the lower suspension member interposed between the upper suspension member and the lower suspension member below the chain block 21 to enable the lower suspension member to rotate in a horizontal plane. It includes a rotating mechanism 22 and a clamp-type hanging balance 23 provided as a lower hanging member.

  The clamp-type hanging balance 23 has a U-shape, and the old floor slab S2 is sandwiched between its upper side and lower side from its side, but the lower side is shorter than the upper side and can be protruded from its end. It has. The clamp-type hanging balance 23 further includes a fastening jack 23b for fixing the old floor slab S2 in a sandwiched state.

  Next, the operation of replacing the floor slab in the bridge using the above-described floor slab replacement machine 100 will be described.

The floor slab changing machine 100 is caused to travel on the road surface constructed of the floor slab, so that the floor slab changing position (P1, P2 position in FIG. 1) is located between the front and rear portal frames 2, 2. In this stop position, the floor slab changer 100 (the portal structure 1) is fixed by the jack 6.
The loading / unloading position of the floor slab is set at a position away from the replacement position of the floor slab in the bridge axis direction, and the trailer 200 mounted with the new floor slab S1 arrives here. After the loading of the new floor slab S1 is completed, the trailer 200 leaves with the old floor slab S2 to be carried out.

In the present embodiment, the replacement of the floor slab is performed in parallel with the loading and installation of the new floor slab S1 and the removal and removal of the old floor slab S2. In order to use the hanging balance 23 having a U-shape, the removal and removal of at least one old slab S2 and then the loading and installation of the new slab S1 and the removal and removal of the old slab S2 are performed in parallel. Do it.
Therefore, the replacement of the floor slab in this embodiment is performed in a state where at least one floor slab has been removed in advance.

  In FIG. 1, the old floor slab at the position P <b> 1 is removed in advance, and a work space (a work space for the clamp-type hanging balance 23 of the second lifting device 20) is formed. Then, by using this work space, the floor slab adjacent to the rear slab (the old slab S2 at the position P2) is removed, and after at least two spaces are formed, the space for the two spaces is removed. The new floor slab S1 is installed on the front side (P1 position).

  Therefore, in FIG. 1, the road surface R1 ahead of the P1 position (left side in the figure) is constructed of the new floor slab that has been replaced, and the road surface R2 behind the position P2 (right side in the figure) is before the replacement. It is built with the existing old floor slab. Accordingly, the replacement of the floor slab by the floor slab replacement machine 100 proceeds to the right in FIG.

The work of replacing the floor slab will be described for each process.
(Delivery of new floor)
FIG. 1 is a side view of a floor slab replacement device in a process of loading a new slab and removing an old slab, and FIG. 3 is a front view corresponding to FIG.
FIG. 8 is an explanatory diagram of the new floor slab carrying-in step.

Referring to FIG. 8, the new floor slab S1 is transported by the trailer 200 to the loading / unloading position (loading position).
Next, the chain block 11 of the first lifting device 10 is extended, and the lifting balance 13 is lowered.
Next, the arms 13a at both ends of the hanging balance 13 are extended to engage with the hanging pieces B1 of the new floor slab S1.
Next, the chain block 11 of the first lifting device 10 is contracted, and the new floor slab S1 is lifted. Thereafter, as described later, the robot is moved to a standby position (a position opposite to the loading / unloading position with the replacement position interposed).

(Removal process of old slab)
The old slab removal process is performed in parallel with the new slab loading process. Therefore, FIGS. 1 and 3 show the old deck slab removal process together with the new deck slab loading process.
FIG. 9 is an explanatory diagram of the old floor slab removing process.

Referring to FIG. 9, the second lifting device 20 is moved above the replacement position (more specifically, one floor slab ahead of the position of the old floor slab S2 to be removed).
Next, the chain block 21 of the second lifting device 20 is extended, and the chain block 21 is lowered to the front of the old floor slab S2 from which the clamp-type lifting balance 23 is removed.
Next, the arm 23a on the lower side of the clamp-type hanging balance 23 is extended, and the entire second lifting device 20 is moved backward by one floor slab, so that the upper side and the lower side of the clamp-type hanging balance 23 are moved. The old floor slab S2 to be removed is sandwiched between the slabs. And it is tightened and fixed by the jack 23b.
Next, the chain block 21 of the second lifting device 20 is contracted, and the old floor slab S2 is lifted.
Thereafter, as described later, the old floor slab S2 is rotated by 90 °, and the longitudinal direction of the old floor slab S2 is directed to the bridge axis direction.

[Passing process]
FIG. 4 is a side view of the floor slab changing device in a passing process, and FIG. 5 is a front view corresponding to FIG.

In the passing process, the first lifting device 10 and the second lifting device 20 are moved so as to pass each other in the direction opposite to each other in the bridge axis direction, and the new floor slab S1 is moved to the replacement position side with the old floor. The plate S2 is relatively moved to the loading / unloading position side.
Specifically, in a state where the second lifting device 20 is stopped at the replacement position, the first lifting device 10 is moved to the standby position opposite to the loading / unloading position across the replacement position. Make them pass each other.

  More specifically, the chain block 21 of the first lifting device 10 is extended in a state where the chain block 21 of the second lifting device 20 is relatively elongated and the space between the left and right chain blocks 21, 21 is increased in the vertical direction. 11 is relatively short, and passes through the space between the left and right chain blocks 21, 21 of the second lifting device 20, together with the new floor slab S1 from which the first lifting device 10 is lifted. (See FIG. 5). Therefore, the new floor slab S1 passes over the old floor slab S2.

4 and 5, the old floor slab S2 lifted by the second lifting device 20 is rotated 90 ° by the rotation mechanism 22 so that the longitudinal direction of the old floor slab S2 is directed to the bridge axis direction. . The change of the orientation may be before the passing or after the passing.
If the second lifting device 20 is stopped at the time of passing, after the passing, the second lifting device 20 is rotated by 90 ° and then moved toward the loading / unloading position.

[New floor slab installation process]
FIG. 6 is a side view of the floor slab replacement device in the process of installing the new slab and carrying out the old slab, and FIG. 7 is a front view corresponding to FIG.
FIG. 10 is an explanatory diagram of a new floor slab installation process.

Referring to FIG. 10, the first lifting device 10 is moved from the standby position to the replacement position while the new floor slab S1 is lifted.
Next, the new floor slab S1 is rotated by 90 ° by the rotation mechanism 12 of the first lifting device 10, so that the longitudinal direction of the new floor slab S1 is oriented in the direction perpendicular to the bridge axis.
Next, the suspension balance 13 of the first lifting device 10 is lowered, and the new floor slab S1 is installed at the replacement position.
Next, the arm 13a of the hanging balance 13 is contracted and cut off from the new floor slab S1, and then the hanging balance 13 is raised. Thereafter, the hanging balance 13 is rotated by 90 ° and moved to the loading / unloading position (loading position) for the next loading of the new slab.

(Old floor slab removal process)
The old floor slab unloading process is performed in parallel with the new floor slab installation process. Therefore, FIGS. 6 and 7 show the old slab unloading process together with the new slab installation process.
FIG. 11 is an explanatory diagram of the old floor slab unloading process.

Referring to FIG. 11, the old floor slab S2 lifted by the second lifting device 20 is rotated by 90 ° by the rotation mechanism 22 so that the longitudinal direction of the old floor slab S2 is directed to the bridge axis direction. However, the change of the direction may be performed before the passing step.
Next, the second lifting device 20 is moved above the trailer 200 at the loading / unloading position together with the old floor slab S2 that has been lifted and rotated.
Next, the old floor slab S2 is hung down, deposited in the trailer 200, the arm 23a is contracted, and the jack 23b is removed to cut off the clamp-type hanging balance 23 and the old floor slab S2. As a result, the old floor slab S2 can be carried out by the trailer 200.
Thereafter, the suspension balance 23 of the second lifting device 20 is rotated by 90 ° and returned to a predetermined position.

  According to this embodiment, by using the two lifting devices 10 and 20 that can pass each other in the bridge axis direction, the floor slab is moved from the loading / unloading position to the replacement position, and is loaded / unloaded from the replacement position. The movement to the position can be performed at the same time. Therefore, the work of loading / installing the new floor slab S1 and the work of removing / unloading the old floor slab S2 can be performed in parallel, and efficient replacement of the floor slab can be realized.

  It should be noted that the illustrated embodiments are merely examples of the present invention, and that the present invention includes various improvements and modifications made by those skilled in the art within the scope of the claims, in addition to those directly shown by the described embodiments. It goes without saying that the changes are included.

Reference Signs List 100 floor slab changer 1 portal structure 2 portal frame 2a side frame 2b leg 3 main frame 4 caster unit (traveling device)
5 tire wheel 6 jack 7 rail (for the first lifting device)
8 rails (for second lifting device)
10 1st lifting device (for loading / installing a new floor slab)
Reference Signs List 11 Chain block 12 Rotation mechanism 13 Hanging balance 13a Arm 20 Second lifting device (for removing and carrying out old floor slab)
21 Chain Block 22 Rotating Mechanism 23 Clamp-type Suspended Balance 23a Arm 23b Tightening Jack S1 New Floor Slab K1 New Floor Slab B1 New Floor Slab Suspension Piece S2 Old Floor Slab

Claims (8)

A device for replacing a floor slab in a bridge,
A gate-shaped structure formed by connecting the gate-shaped frames in front and behind the bridge axis direction,
Two sets of rails arranged in the direction of the bridge axis along the ceiling of the portal structure;
A first slab suspended from one set of rails and capable of moving to the replacement position by lifting the new slab at the loading / unloading position set in a position away from the replacement position of the floor slab in the bridge axis direction. Lifting equipment,
A second lifting device suspended on the other set of rails and lifting the old floor slab at the replacement position, and movable to the loading / unloading position;
A rotation mechanism provided in each of the first and second lifting devices and capable of changing the direction by rotating the lifted floor slab in a horizontal plane;
Is composed of
The first and second lifting devices are configured to be able to pass each other in the direction opposite to each other in the bridge axis direction while the floor slabs are lifted. apparatus.   The floor slab changing device according to claim 1, wherein the first and second lifting devices have a configuration in which one of the slabs passes over the other slab and passes each other. Of the first and second lifting devices, one of the lifting device rails is provided in the width direction central portion of the portal structure, the other lifting device rail, To sandwich the rail for the one lifting device, provided at both ends in the width direction of the portal structure,
The other lifting device includes at least a pair of left and right chain blocks suspended on each of the left and right rails on both ends in the width direction and movable along each rail.
The said one lifting apparatus is comprised so that the space between the left and right chain blocks of the said other lifting apparatus can be passed in the state which lifted the floor slab, The Claim 1 or Claim characterized by the above-mentioned. 2. The floor slab replacement device according to 2.   The said portal-type structure is equipped with the driving | running | working apparatus which can run on the road surface with the tire wheel in the leg part of the said portal-type frame, The Claims any one of Claims 1-3 characterized by the above-mentioned. Floor slab replacement device.   The said portal-type structure, The leg part of the said portal-type frame is provided so that a position adjustment is possible at right angles to a bridge axis, and has a width adjustment function, The Claims characterized by the above-mentioned. The floor slab replacement device according to one of the above. A method of replacing a floor slab in a bridge,
At the loading / unloading position set in a position away from the replacement position of the slab in the bridge axis direction, the first slab is used to suspend the new slab in a state where the longitudinal direction is in the bridge axis direction. Loading process,
A removing step of lifting the old slab by the second lifting device at the replacement position;
The first lifting device and the second lifting device are moved so as to pass each other in the bridge axis direction in opposite directions, and the new floor slab is moved to the replacement position side and the old floor slab is loaded. A passing process of moving relatively to the unloading position side,
An installation step of rotating the new floor slab moved to the replacement position by the first lifting device in a horizontal plane so that the longitudinal direction thereof is perpendicular to the bridge axis, and suspended and installed;
After lifting by the second lifting device, before or after the passing step, the old floor slab is rotated in a horizontal plane and its longitudinal direction is directed to the bridge axis direction. An unloading process of hanging down the old slab moved to the loading / unloading position and unloading it,
A method of replacing a floor slab, comprising:   In the passing step, in a state where the second lifting device is stopped at the replacement position, the first lifting device is moved so as to pass each other, and the first lifting device is sandwiched between the replacement positions. 7. The method according to claim 6, wherein the slab is moved to a standby position opposite to the loading / unloading position. The first and second lifting devices are provided on each of two sets of rails arranged in the bridge axis direction along the ceiling of the portal structure formed by connecting the portal frames in the bridge axis direction. Suspended,
Of the first and second lifting devices, one of the lifting device rails is provided in the width direction central portion of the portal structure, the other lifting device rail, To sandwich the rail for the one lifting device, provided at both ends in the width direction of the portal structure,
The other lifting device includes at least a pair of left and right chain blocks suspended on each of the left and right rails on both ends in the width direction and movable along each rail.
In the passing step, the one lifting device passes through the space between the left and right chain blocks of the other lifting device in a state where the floor slab is lifted. 7. The method for replacing a floor slab according to 7.