JP6668676B2 - Heavy equipment - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a heavy-weight construction device usable in a work area having a limited head.

  For example, when constructing an underground continuous wall, a reinforcing steel cage is placed immediately above an excavation groove formed by excavating underground with a crawler crane as disclosed in Patent Document 1, and excavation is performed first. A method of repeating the process of inserting while reinforcing with the reinforcing cage inserted into the groove, building a plurality of reinforcing cages that have been added until the desired height is reached, and then placing concrete in the excavation groove. Are known.

  Since the crawler crane as disclosed in the cited document 1 can suspend a super-weighted rebar cage assembled at a large height, the work of building the rebar cage can be performed efficiently, If the work area has an empty head restriction, it may not be used. For this reason, if the work area has a low head, install a leader type elevator equipped with a leader with a height that satisfies the head height limitation on the base machine, and build a reinforcing cage with these leader type elevators, etc. Was.

JP-A-2002-322624

  However, in the above method of suspending a reinforced basket with a base machine and a leader type elevator, it is necessary to change the size of the base machine according to the weight of the reinforced basket, and when trying to suspend a super heavy reinforced basket, Since the size of the base machine is also large, it is easy for the headroom to be too large to fit into the working band width, in addition to the restriction of the head. In addition, since the height of the reinforcing bar cage is limited by the stroke of the leader type elevator, it is necessary to consider the size and weight of the reinforcing bar cage so that it can be compatible with the base machine used and the leader type elevator. However, the workability was affected, for example, the number of times of reinforcing bars was increased. In addition, in the work of building a reinforced cage with a base machine and a leader type elevator, it is not possible to fine-tune the plane position of heavy objects in a suspended state, so not only it takes a lot of time to perform the positioning work separately, but also In addition, the work of accurately building is complicated.

  The present invention has been made in view of such problems, and a main object of the present invention is to be able to suspend a heavy object having a desired weight even when a work area is narrow and there is a restriction on head space, An object of the present invention is to provide a heavy-weight building apparatus capable of easily performing position determination when building a heavy body.

In order to achieve such an object, the heavy object erection device of the present invention includes a pair of traveling bodies arranged in parallel at an interval, and legs disposed before and after the traveling direction of each of the pair of traveling bodies, A pair of upper connecting members that connect the legs adjacent to each other in a direction perpendicular to the traveling direction of the traveling body, and a suspending device that is suspended from the pair of upper connecting members via a plane position adjustment device. The leg portion has a telescopic device that expands and contracts in a vertical direction, and the plane position adjusting device has a moving unit that moves the suspension device in a traveling direction of the traveling body and in a direction perpendicular to the traveling direction. The suspending device is provided with a telescopic device that expands and contracts in a vertical direction and includes a rod and a cylinder, and a suspending jig that is rotatably joined to a periphery of the cylinder in a horizontal plane around the cylinder. Features.

  According to the above heavy object building device, the hanging device for suspending the heavy object is disposed inside the four legs constituting the heavy object building device and below the pair of upper connecting members. Is done. Therefore, the work area is narrow and the head space is limited by arranging the suspending device approximately in the center of the four legs in plan view and providing sufficient spacing between the four legs so as to form a tower. Also in this case, a heavy object having a desired weight can be safely transported, and the building operation can be performed efficiently.

  In addition, since the suspension device is moved in the traveling direction of the traveling body and in a direction perpendicular to the traveling direction by the plane position adjusting device, the traveling device does not move the heavy load building device itself, and the suspension device uses the suspended device. The plane position of the suspended heavy object can be finely adjusted, so that the workability and the installation accuracy when installing the heavy object can be greatly improved.

  According to the above heavy object building device, since the suspending jig is provided in the telescopic device that expands and contracts in the vertical direction, the movable range of the suspending jig in the vertical direction depends on the amount of expansion and contraction of the leg device. Since the amount is the added amount, it becomes possible to hang a heavy object having a higher height with the hanging jig as compared with the case where only the leg portion expands and contracts.

  Also, since the hanging jig rotates in the horizontal plane with respect to the telescopic device provided in the suspending device, the plane position of the suspended heavy object should be finely adjusted also in the horizontal rotation direction around the telescopic device. Becomes possible.

  According to the heavy object construction device of the present invention, the suspension device for suspending the heavy object is installed on the upper connecting member via the plane position adjusting device, and can be disposed substantially at the center of the four legs. In addition, even when the working area is narrow and the head space is restricted, it is possible to hang a super heavy object and to easily perform positioning when the heavy object is erected.

It is the sectional view of the whole heavy load building device seen from the direction perpendicular to the running direction. It is a top view of the running body in a heavy-weight building apparatus. It is the sectional view of the whole heavy load building device seen from the running direction. It is a top view of an upper connection member and a plane position adjusting device in a heavy load erection device. It is sectional drawing of the state which the heavy-weight building apparatus was shortened seen from the direction orthogonal to the running direction. It is a figure which shows the construction method of a reinforcement cage (the 1). It is a figure showing the erection method of a rebar basket (the 2). It is a figure which shows the construction method of a reinforcement cage (the 3). It is a figure which shows the construction method of a reinforcement cage (the 4).

  The heavy object building apparatus according to the present invention is capable of transporting heavy objects such as reinforced cages, straight pillars, and precast members in a low work space and a narrow work area, and an excavation area in which these heavy objects are provided in the ground. It is a device that can perform fine adjustment of the plane position when inserted and built into the device. In the present embodiment, a steel cage used as a heavy object when constructing an underground continuous wall, a cast-in-place concrete pile, or the like is taken as an example, and the heavy object building apparatus 1 will be described below with reference to FIGS. 1 to 5. I will explain it.

  As shown in FIG. 1, a heavy-weight building apparatus 1 connects a traveling body 2 traveling on a rail R installed on the ground, legs 3 installed on the traveling body 2, and the legs 3. An upper connecting member 4, a planar position adjusting device 5 arranged to be bridged over the upper connecting member 4, and a suspending device 15 installed on the planar position adjusting device 5 for suspending the reinforcing cage G are provided. .

  The traveling body 2 includes a leg support pedestal 21 disposed before and after in the traveling direction, and a pedestal connecting member 22 for connecting the leg pedestal 21. , And an outrigger jack 24 that can be extended and contracted in the vertical direction, and functions as a stopper when traveling is stopped. As shown in the plan view of FIG. 2, a pair of the traveling bodies 2 having such a configuration are arranged in parallel at intervals in a direction orthogonal to the traveling direction. It is needless to say that the pair of traveling bodies 2 are arranged at an interval wider than the width of the excavation area T into which the reinforcing cage G is inserted.

  As shown in FIG. 1, the leg 3 is composed of a hydraulic jack arranged to expand and contract in the vertical direction, and the cylinder 31 is attached to and detached from the leg support base 21 arranged before and after the traveling direction of the traveling body 2. It is freely fixed. As shown in FIG. 2, since four legs 3 are installed in total, if, for example, a hydraulic jack capable of supporting a load of 20 t is adopted, the heavy-weight building apparatus 1 becomes the reinforced cage G, The total weight of the upper connecting member 4 and the plane position adjusting device 5 can be supported up to 80t.

  As shown in FIG. 1 and FIG. 3, the upper connecting member 4 is one of the legs 3 installed on each of the pair of traveling bodies 2 and adjacent to each other in the direction orthogonal to the traveling direction of the traveling body 2. Are arranged at an interval in the running direction so as to be connected to each other. As a result, the legs 3 installed on each of the pair of traveling bodies 2 are connected to the legs 3 located on the front side in the traveling direction and the legs 3 located on the rear side in the traveling direction. The upper connecting member 4 is detachably fixed to a rod 32 of a hydraulic jack constituting the leg 3.

  The plane position adjustment device 5 is a device for finely adjusting the plane position of the suspension device 15 described later in the traveling direction of the traveling body 2 and the direction perpendicular to the traveling direction. As shown in FIG. A pair of traveling orthogonal direction moving members 6 arranged so as to be bridged over the connecting member 4, a bridge member 7 bridged between the pair of traveling orthogonal direction moving members 6, and arranged on the bridge member 7. It is constituted by a traveling direction moving member 8. It should be noted that the girder-shaped member 7 is composed of a pair of first girder members 71 connecting the pair of traveling orthogonal direction moving members 6 and a pair of second girder members 72 connecting the pair of first girder members 71. Is done. The traveling direction moving member 8 is installed so as to span the pair of second girder members 72.

  In the planar position adjusting device 5 having the above-described configuration, the pair of traveling orthogonal direction moving members 6 are supported by the reaction force plate 10 provided on the upper connecting member 4 and extend and contract in a direction perpendicular to the traveling direction, as shown in FIG. It moves on the upper connecting member 4 in the direction orthogonal to the running direction via the expanding and contracting device 9. Also, as shown in FIGS. 1 and 4, the traveling direction moving member 8 is supported by a reaction force plate 12 provided between the pair of traveling orthogonal direction moving members 6 and extends and contracts in the traveling direction via an expansion and contraction device 11. It moves on the pair of second girder members 72 forming the girder member 7 in the traveling direction. Since the suspension device 15 is installed in the traveling direction moving member 8, the suspension device 15 is moved in the traveling direction in the inner area of the four legs 3 by the planar position adjusting device 5 having the above-described configuration. And the plane position is moved in a direction orthogonal to the traveling direction.

  Further, as shown in FIG. 1, the suspension device 15 includes a telescopic device 13 that expands and contracts in the vertical direction, and a suspending jig 14 installed on the telescopic device 13. The telescopic device 13 is composed of a hydraulic jack. The distal end of the rod 131 is connected to the traveling direction moving member 8 so that the telescopic device 13 is installed in a hanging state with respect to the plane position adjusting device 5. The hanging jig 14 is rotatably joined to the outer periphery of the cylinder 132 of the expansion and contraction device 13 in a horizontal plane with the cylinder 132 as an axis. The hanging jig 14 may have any shape, but in the present embodiment, a flat plate member 141 having a hole through which the cylinder 132 penetrates, and a plurality of wires hanging down from the lower surface of the flat plate member 141. 142.

  The heavy-weight building apparatus 1 having the above-described configuration travels on the rail R via the traveling body 2 in a state where the plurality of wires 142 provided on the hanging jig 14 are connected to the reinforcing bar cage G. Can be transported in the work area.

  In addition, the heavy-weight building apparatus 1 can move the rebar basket G in the vertical direction by the expansion and contraction of the leg 3 and the expansion and contraction of the expansion and contraction device 13 provided in the suspension device 15. At this time, as shown in FIG. 1, by shortening only the extendable device 13 from the state where both the leg 3 and the extendable device 13 are extended, it is possible to catch the reinforcing bar G to the uppermost position. On the other hand, as shown in FIG. 5, by extending only the telescopic device 13 from the state in which both the leg 3 and the telescopic device 13 are shortened, it is possible to lower the reinforcing bar cage G to the lowest position. As described above, the vertical movable range of the suspension jig 14 provided in the suspension device 15 is such that the extension amount of the extension device 13 is added to the extension amount of the leg portion 3. , It is possible to suspend the reinforcing bar basket G having a larger height.

  Furthermore, the heavy-weight building apparatus 1 can move the plane position of the reinforcing bar cage G by the hanging jig 14 provided in the plane position adjusting device 5 and the hanging device 15. That is, even when the traveling body 2 is stopped, the reinforcing bar cage G can be moved by the plane position adjusting device 5 in the traveling direction of the traveling body 2 and in a direction orthogonal to the traveling direction, as shown in FIG. is there. In addition, by rotating the hanging jig 14 in the horizontal plane with respect to the expansion and contraction device 13, the reinforcing cage G can be moved in a plane in the horizontal rotation direction around the expansion and contraction device 13.

  In addition, since the heavy-weight building apparatus 1 has the leg 3 detachably fixed to both the leg support frame 21 and the upper connecting member 4, the hydraulic jack used as the leg 3 is provided. Can be appropriately replaced. Therefore, the four leg portions 3 should have a sufficient distance between the front and rear of the traveling body 2 in the traveling direction and the interval adjacent to the traveling direction in a direction perpendicular to the traveling direction so that the four leg portions 3 do not become a large flat rectangle in plan view. By adopting a hydraulic jack according to the weight of the reinforcing basket G to be suspended for the legs 3, the heavy building apparatus 1 can stably suspend the super-heavy reinforcing basket G without deformation. It becomes possible.

Next, a method of building the reinforcing bar cage G using the heavy-weight building apparatus 1 will be described below with reference to FIGS.
In the present embodiment, as shown in FIG. 7, the excavation area T provided in the ground is filled with the stabilizing liquid B, and the reinforcing bar cage G ′ having two steps has already been built therein, At 16, the load is temporarily received.

  First, as shown in FIG. 6 (a), for example, a work vehicle 17 such as a forklift transports a reinforcing basket G to be replenished, and as shown in FIG. It is temporarily placed in the storage place 18. Next, as shown in FIG. 7A, using the rails R laid on the ground surface on both sides of the excavation area T as shown in FIG. 1 is moved to the temporary storage area 18. At this time, it is preferable to extend the leg 3 and shorten the extension device 13 of the suspension device 15 so that the suspension jig 14 is disposed at the uppermost portion. Thereafter, as shown in FIG. 7 (b), the leg 3 is shortened and the suspension device 15 is extended in accordance with the height of the reinforcing cage G, and the wire 142 provided on the suspending jig 14 is connected to the reinforcing cage. Perform the slinging operation to connect to the upper part of G.

  Next, as shown in FIG. 8A, the leg 3 is extended and the extension device 13 of the suspension device 15 is shortened, and the reinforced basket G is caught to the uppermost position. As shown by the arrow, after moving the heavy load building apparatus 1 so that the reinforcing bar cage G is located immediately above the excavation area T, the outrigger jack 24 installed on the lower surface of the traveling body 2 is extended to build the heavy load building. The device 1 is fixed. Thereafter, the reinforcing rod cage G to be added is moved by the plane position adjusting device 5 in the traveling direction of the traveling body 2 and in a direction perpendicular to the traveling direction, or the hanging jig 14 is horizontally rotated with respect to the telescopic device 13. By finely adjusting the plane position, for example, the position of the reinforcing bar cage G ′ inserted into the excavation area T is determined.

  In this state, as shown in FIG. 9 (a), the rebar cage G to be extended by extending the telescopic device 13 of the suspension device 15 by a required amount is lowered, and the rebar inserted in the excavation area T is lowered. The connection with the basket G 'is performed. Then, the pin 16 which temporarily received the load of the reinforcing rod cage G 'inserted into the excavation area T is removed, and the load of the reinforcing rod cage G' inserted into the excavating area T and the reinforcing rod cage G added thereto. Are supported by the heavy load building apparatus 1. Thereafter, the leg portion 3 is shortened, and the telescopic device 13 of the suspending device 15 is extended, so that the reinforced basket G is hung down in the excavation region T, and as shown in FIG. The load of the cage G and the reinforcing bar cage G ′ previously inserted into the excavation area T are changed to the pinning bars 16.

  After these operations are completed, the connection between the reinforced basket G and the wire 142 is released, and the heavy-weight building apparatus 1 is moved. The above-described operation is repeated until a desired number of reinforced baskets G are connected and built in the excavation area T, whereby the work of setting the reinforced basket G in the excavated area T is completed.

  According to the above-described method of building the reinforced basket G, after the reinforced basket G to be added is placed directly above the excavation area T by the heavy load building apparatus 1, the plane position of the reinforced basket G is changed to the heavy load. The fine adjustment can be appropriately performed by the plane position adjusting device 5 and the suspension device 15 without depending on the movement of the loading device 1. Therefore, the positioning of the reinforcing bar cage G with respect to the reinforcing bar cage G 'previously inserted into the excavation region T can be performed efficiently and accurately by a simple operation.

  In addition, it is needless to say that the heavy load building device 1 of the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention.

  For example, in the present embodiment, the pair of traveling bodies 2 is not directly connected to each other, but the leg supporting frames 21 on the front side in the traveling direction or the leg supporting frames 21 on the rear side in the traveling direction are connected. It may be. In this case, since the four legs 3 are more firmly connected to each other, a hydraulic jack capable of supporting a large load is adopted for the legs 3, and the heavy load building apparatus 1 supports a super heavy load. It becomes possible. When connecting the leg support frames 21 on both the front side and the rear side in the traveling direction, one of them can be opened and closed, and the reinforcing bar cage G can be inserted between the pair of traveling bodies 2 from the traveling direction. It is good to do so.

  Further, in the present embodiment, the hydraulic jacks are used for the telescopic device 9 and the telescopic device 11 provided in the leg portion 3, the plane position adjusting device 5, and the telescopic device 13 of the suspension device 15, respectively. However, any mechanical or pneumatic jack may be used as long as the jack is configured to be stretchable.

DESCRIPTION OF SYMBOLS 1 Heavy-weight construction apparatus 2 Traveling body 21 Leg support base 22 Frame connection member 23 Box wheel 24 Outrigger jack 3 Leg 31 Cylinder 32 Rod 4 Upper connection member 5 Planar position adjustment device 6 Traveling orthogonal direction moving member 7 Cross beam member 71 first girder member 72 second girder member 8 traveling direction moving member 9 telescopic device 10 reaction plate 11 telescopic device 12 reaction plate 13 telescopic device 131 rod 132 cylinder 14 hanging jig 141 flat member 142 wire 15 hanging device 16 Hairpin 17 Work vehicle 18 Temporary storage area R Rail T Excavation area B Bentonite

Claims (1)

A pair of traveling bodies arranged in parallel at an interval, legs arranged before and after the traveling direction of each of the pair of traveling bodies, and the legs adjacent to each other in a direction perpendicular to the traveling direction of the traveling body. A pair of upper connecting members to be connected, and a hanging device that is suspended from the pair of upper connecting members via a plane position adjusting device,
The leg has a telescopic device that expands and contracts in the vertical direction,
The plane position adjusting device has moving means for moving the hanging device in a direction perpendicular to the traveling direction and the traveling direction of the traveling body,
The suspending device extends and contracts in the vertical direction, and a telescopic device including a rod and a cylinder,
A heavy-weight building apparatus comprising: a suspension jig provided on the outer periphery of the cylinder so as to be rotatable in a horizontal plane around the cylinder .

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