JP2017078311A - Heavy load erection device - Google Patents

Abstract

A weight capable of suspending a heavy object having a desired weight and easily positioning a heavy object even when the work area is narrow and the head is limited. Provide construction equipment.
SOLUTION: A pair of traveling bodies arranged in parallel with an interval, leg portions disposed before and after the traveling direction of each of the pair of traveling bodies, and leg portions adjacent to each other in a direction orthogonal to the traveling direction of the traveling body. A pair of upper connecting members that connect each other, and a suspension device that is suspended from the pair of upper connecting members via a plane position adjusting device, and the leg portion includes a telescopic device that expands and contracts in the vertical direction. The position adjusting device includes moving means for moving the suspension device in the traveling direction of the traveling body and in a direction orthogonal to the traveling direction.
[Selection] Figure 4

Description

  The present invention relates to a heavy-duty construction device that can be used in a work area where there is a sky head limitation.

  For example, when building an underground continuous wall, a rebar is placed immediately above the excavation groove provided by excavating the underground with a crawler crane as disclosed in Patent Document 1, and excavated in advance. There is a method in which a concrete is placed in an excavation groove after a plurality of reinforcement rods that have been added to a desired height are built by repeating the insertion process while adding the reinforcement rods inserted into the groove. Are known.

  Since the crawler crane as disclosed in the cited document 1 can suspend a super-weight rebar bar assembled to a large height, it can efficiently perform the work of building the rebar bar. If the work area has an empty head limit, it may not be used. For this reason, when the work area is low-headed, install a leader-type elevator equipped with a leader with a height that satisfies the head-of-head restriction on the base machine, and build a reinforcing bar with these leader-type elevators. Was.

JP 2002-322642 A

  However, in the method of suspending the reinforcing bar rod with the above base machine and the leader type elevator, it is necessary to change the size of the base machine according to the weight of the reinforcing rod rod. Since the base machine is also increased in size, it is prone to a situation that does not fall within the working band width as well as the limited head. In addition, the height of the reinforcing bar is also limited by the stroke of the leader type elevator. Therefore, when manufacturing the reinforcing bar, the size and weight must be considered so as to be compatible with the base machine and leader type elevator used. However, the workability was affected, for example, the number of times of rebar reinforcement work was increased. Furthermore, in the construction work of the reinforcing bar with the base machine and the leader type elevator, the plane position of the heavy load cannot be finely adjusted in the suspended state, so it takes not only a great deal of time to perform the separate positioning work. Therefore, the work for accurately building is complicated.

  The present invention has been made in view of such problems, and its main purpose is to be able to suspend a heavy object having a desired weight even when the work area is narrow and there is a sky head limitation, It is an object of the present invention to provide a heavy-duty construction device capable of easily performing positioning when constructing a heavy article.

  In order to achieve such an object, the heavy-duty construction device of the present invention includes a pair of traveling bodies arranged in parallel at intervals, leg portions disposed before and after the traveling direction of each of the pair of traveling bodies, A pair of upper connecting members that connect the leg portions adjacent to each other in a direction orthogonal to the traveling direction of the traveling body, and a suspension device that is suspended from the pair of upper connecting members via a planar position adjusting device. The leg portion has a telescopic device that expands and contracts in the vertical direction, and the planar position adjusting device has a moving means for moving the suspension device in a traveling direction of the traveling body and a direction orthogonal to the traveling direction. It is characterized by.

  According to the above-described heavy-duty construction device, the suspension device that suspends the heavy material is disposed inside the four legs constituting the heavy-duty construction device and below the pair of upper connecting members. Is done. Accordingly, the suspension device is arranged in the approximate center of the four legs in plan view, and the working space is narrow and the head is limited by sufficiently arranging the arrangement of the four legs so as to form a heel. Even in this case, it is possible to safely transport a heavy object having a desired weight and efficiently perform the erection work.

  In addition, since the suspension device moves in the traveling direction of the traveling body and the direction orthogonal to the traveling direction by the planar position adjusting device, the suspension device does not move the heavy article building device itself in the traveling body. The planar position of the suspended heavy object can be finely adjusted, and the workability and installation accuracy when building a heavy object can be greatly improved.

  In the heavy-duty construction apparatus according to the present invention, the suspension device includes a telescopic device that expands and contracts in a vertical direction, and a hanging jig that rotates in a horizontal plane with the telescopic device as a central axis.

  According to the heavy construction apparatus, since the suspension jig is provided in an expansion / contraction device that expands / contracts in the vertical direction, the movable range of the suspension jig in the vertical direction can be expanded / contracted by the expansion / contraction amount of the leg portion. Since the amount is an added amount, it is possible to suspend a heavy object with a height higher than that when only the leg portion expands and contracts with the lifting jig.

  In addition, since the suspension jig rotates in a horizontal plane with respect to the expansion / contraction device provided in the suspension device, the planar position of the suspended heavy object can be finely adjusted in the horizontal rotation direction around the expansion / contraction device. Is possible.

  According to the heavy-duty construction device of the present invention, the suspension device for suspending heavy objects is installed on the upper connecting member via the planar position adjustment device, and can be arranged at the approximate center of the four leg portions. Even when the work area is narrow and the head is limited, it is possible to suspend a very heavy object and to easily position the object when building the heavy object.

It is sectional drawing of the whole heavy article construction apparatus seen from the direction orthogonal to a running direction. It is a top view of the traveling body in a heavy article erection device. It is sectional drawing of the whole heavy article erection device seen from the running direction. It is a top view of the upper connection member and plane position adjustment apparatus in a heavy article erection device. It is sectional drawing of the state where the heavy article construction apparatus seen from the direction orthogonal to a running direction was shortened. It is a figure which shows the erection method of a reinforcing rod (the 1). It is a figure which shows the construction method of the reinforcing bar (the 2). It is a figure which shows the construction method of the reinforcing bar (the 3). It is a figure which shows the construction method of a reinforcing bar (the 4).

  The heavy-duty construction apparatus of the present invention is capable of transporting heavy objects such as reinforcing bar, structural pillar, precast member, etc., in a low-altitude and narrow work area, and an excavation area in which these heavy objects are provided in the ground It is a device that can finely adjust the plane position when it is inserted and built. In this embodiment, a steel bar used when constructing underground continuous walls, cast-in-place concrete piles, etc. as heavy objects is taken as an example, and the heavy object building device 1 will be described below with reference to FIGS. I will explain.

  As shown in FIG. 1, the heavy-duty construction device 1 connects a traveling body 2 traveling on a rail R installed on the ground, a leg 3 installed on the traveling body 2, and the leg 3. The upper connecting member 4, the planar position adjusting device 5 arranged so as to be bridged over the upper connecting member 4, and the suspension device 15 that is installed in the planar position adjusting device 5 and suspends the reinforcing bar rod G are provided. .

  The traveling body 2 includes a leg support pedestal 21 that is arranged before and after the traveling direction, and a gantry connecting member 22 that couples the leg support pedestal 21. A box wheel 23 for traveling the vehicle and an outrigger jack 24 that functions as a stopper at the time of traveling stop and that can extend and contract in the vertical direction are installed. As shown in the plan view of FIG. 2, a pair of traveling bodies 2 having such a configuration are arranged in parallel at intervals in a direction orthogonal to the traveling direction. In addition, it cannot be overemphasized that a pair of traveling body 2 is arrange | positioned with the space | interval wider than the width | variety of the excavation area | region T in which the reinforcing bar G is inserted.

  As shown in FIG. 1, the leg portion 3 is composed of a hydraulic jack arranged so as to extend and contract in the vertical direction, and the cylinder 31 is attached to and detached from the leg portion support base 21 arranged before and after the running body 2 in the running direction. It is fixed freely. As shown in FIG. 2, since a total of four legs 3 are installed, for example, when a hydraulic jack that can support a load of 20 t is adopted, the heavy-weight building device 1 is a rebar rod G, The total weight of the upper connecting member 4 and the planar position adjusting device 5 can be supported up to 80 t.

  As shown in FIGS. 1 and 3, the upper connecting member 4 is formed by connecting the leg portions 3 adjacent to each other in the direction orthogonal to the traveling direction of the traveling body 2 among the leg portions 3 installed in each of the pair of traveling bodies 2. A pair is arranged at intervals in the traveling direction so as to connect the two. Thereby, the leg part 3 installed in each of a pair of traveling body 2 connects the leg part 3 located in the running direction front side, and the leg part 3 located in the running direction back side, respectively. The upper connecting member 4 is detachably fixed to a rod 32 of a hydraulic jack forming the leg portion 3.

  The planar position adjusting device 5 is a device for finely adjusting the planar position of the suspension device 15 described later in the traveling direction of the traveling body 2 and the direction orthogonal 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 cross beam-like member 7 bridged between the pair of traveling orthogonal direction moving members 6, and the cross beam-like member 7. The traveling direction moving member 8 is used. The cross-girder member 7 includes a pair of first girder members 71 that couple the pair of travel orthogonal direction moving members 6 and a pair of second girder members 72 that couple the pair of first girder members 71 to each other. Is done. The traveling direction moving member 8 is installed so as to be bridged between 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 in the upper connecting member 4 and extend and contract in a direction orthogonal to the traveling direction, as shown in FIG. The upper connecting member 4 is moved in a direction orthogonal to the traveling direction via the extending and contracting device 9. Further, as shown in FIGS. 1 and 4, the traveling direction moving member 8 is supported by a reaction force plate 12 provided between a pair of traveling orthogonal direction moving members 6, via an expansion / contraction device 11 that expands and contracts in the traveling direction. It moves on the pair of second girder members 72 forming the cross-girder member 7 in the traveling direction. Since the travel direction moving member 8 is provided with the suspension device 15, the suspension device 15 travels in the inner area of the four legs 3 by the planar position adjustment device 5 having the above-described configuration. In addition, the plane position is moved in a direction orthogonal to the traveling direction.

  Further, as shown in FIG. 1, the suspension device 15 includes an expansion device 13 that expands and contracts in the vertical direction and a suspension jig 14 that is installed in the expansion device 13. The telescopic device 13 is a hydraulic jack, and is installed in a suspended state with respect to the planar position adjusting device 5 by connecting the tip of the rod 131 to the traveling direction moving member 8. The suspension jig 14 is joined to the outer periphery of the cylinder 132 of the telescopic device 13 so as to be rotatable in a horizontal plane with the cylinder 132 as an axis. The hanging jig 14 may have any shape, but in this embodiment, a flat plate member 141 provided with a hole through which the cylinder 132 passes and a plurality of wires suspended from the lower surface of the flat plate member 141. 142.

  The heavy article 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 in the hanging jig 14 are connected to the reinforcing bar G, so that the reinforcing bar G Can be transported in the work area.

  Further, the heavy-duty construction device 1 can move the reinforcing bar rod G in the vertical direction by the expansion and contraction of the legs 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, it is possible to lift the reinforcing bar rod G to the uppermost position by shortening only the telescopic device 13 from the state where both the leg 3 and the telescopic device 13 are extended. On the other hand, as shown in FIG. 5, it is possible to hang down the reinforcing bar rod G to the lowest position by extending only the telescopic device 13 from a state where both the leg 3 and the telescopic device 13 are shortened. As described above, the vertical movable range of the suspension jig 14 provided in the suspension device 15 is obtained by adding the expansion / contraction amount of the expansion / contraction device 13 to the expansion / contraction amount of the leg portion 3, so that only the leg portion 3 expands / contracts. Compared to the above, it is possible to suspend the reinforcing bar rod G having a larger height.

  Furthermore, the heavy article building device 1 can move the planar position of the reinforcing bar rod G by the suspension jig 14 provided in the planar position adjusting device 5 and the suspension device 15. That is, as shown in FIG. 4, the reinforcing bar rod G can be moved in the traveling direction of the traveling body 2 and the direction orthogonal to the traveling direction by the planar position adjusting device 5 as shown in FIG. 4. is there. Further, by rotating the suspension jig 14 with respect to the expansion / contraction device 13 in a horizontal plane, the reinforcing bar rod G can also be moved in the horizontal direction around the expansion / contraction device 13 as a central axis.

  In addition, since the heavy load building device 1 fixes the leg 3 to the leg support base 21 and the upper connecting member 4 in a detachable manner, the hydraulic jack employed as the leg 3 is used. Can be replaced as appropriate. Therefore, with respect to the four leg portions 3, the distance before and after the traveling direction of the traveling body 2 and the distance adjacent to each other in the direction orthogonal to the traveling direction are sufficiently set so as not to be a flattened rectangle in plan view. By adopting a hydraulic jack according to the weight of the reinforcing bar G to be hung on the leg 3, the heavy load erection device 1 can be stably suspended without deforming the heavy load building apparatus 1. It becomes possible.

Next, a method for building a reinforcing bar rod G using the heavy load building device 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 two-stage reinforcing bar G ′ has already been built, and the hairpin At 16, the load is temporarily received.

  First, as shown in FIG. 6 (a), the reinforcing bar rod G to be added is transported by a work vehicle 17 such as a forklift, for example, and as shown in FIG. Temporary storage in the storage area 18. Next, using the rails R laid on both ground surfaces across the excavation area T as shown in FIG. 3, as shown in FIG. 1 is moved to the temporary storage 18. At this time, it is preferable to extend the leg portion 3 and shorten the telescopic device 13 of the suspension device 15 so that the suspension jig 14 is arranged at the top. Thereafter, as shown in FIG. 7B, the leg 3 is shortened or the suspension device 15 is extended according to the height of the reinforcing bar rod G, and the wire 142 provided in the hanging jig 14 is connected to the reinforcing bar rod. The slinging work connected to the upper part of G is performed.

  Next, as shown in FIG. 8 (a), the leg 3 is extended and the telescopic device 13 of the suspension device 15 is shortened so that the reinforcing bar rod G is lifted up to the top, and FIG. 8 (b). As shown in Fig. 2, after moving the heavy load construction device 1 so that the reinforcing bar G is located immediately above the excavation region T, the outrigger jack 24 installed on the lower surface of the traveling body 2 is extended to build the heavy load. The device 1 is fixed. Thereafter, the reinforcing bar G to be added is moved by the planar position adjusting device 5 in the traveling direction of the traveling body 2 and in the direction perpendicular to the traveling direction, or the suspension jig 14 is rotated horizontally with respect to the telescopic device 13. The position of the reinforcing bar rod G ′ inserted in the excavation region T is determined by finely adjusting the planar position, for example.

  In this state, as shown in FIG. 9A, the reinforcing bar G to be added by extending the telescopic device 13 of the lifting device 15 by a necessary amount is suspended and the reinforcing bar inserted in the excavation region T is suspended. Connect with 籠 G '. Then, the barb 16 that has temporarily received the load of the reinforcing bar G ′ inserted in the excavation area T is removed, and the load of the reinforcing bar G ′ inserted in the excavation area T and the load of the reinforcing bar G added thereto Both of these are supported by the heavy article erection device 1. Thereafter, the leg portion 3 is shortened and the telescopic device 13 of the suspension device 15 is extended to suspend the added reinforcing bar rod G in the excavation region T, and the added reinforcing bar as shown in FIG. 9B. The load of the reed bar G and the rebar bar G ′ that has been inserted in the excavation area T in advance is replaced with the barb 16.

  After these operations are completed, the connection between the reinforcing bar G and the wire 142 that have been added is released, and the heavy article construction device 1 is moved. The above-described operation is repeated until a desired number of reinforcing bar rods G are connected and built in the excavation area T, whereby the installation operation of the reinforcing bar rod G in the excavation area T is completed.

  According to the above-described method of building the reinforcing bar G, after the reinforcing bar G to be added is placed immediately above the excavation region T by the heavy load building device 1, the planar position of the reinforcing bar G is set to the heavy building. The flat position adjustment device 5 and the suspension device 15 can be finely adjusted as appropriate without moving the insertion device 1. Therefore, it is possible to efficiently and accurately position the reinforcing bar rod G relative to the reinforcing bar rod G ′ previously inserted in the excavation region T by a simple operation.

  In addition, it goes without saying that the heavy article building device 1 of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

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

  Moreover, in this Embodiment, although the hydraulic jack was each employ | adopted as the expansion-contraction apparatus 9 and the expansion-contraction apparatus 11 with which the leg part 3 and the plane position adjustment apparatus 5 were equipped, and the expansion-contraction apparatus 13 of the suspension apparatus 15, it is not necessarily restricted to this. However, any mechanical type or pneumatic type may be adopted as long as the jack is configured to be stretchable.

DESCRIPTION OF SYMBOLS 1 Heavy article mounting apparatus 2 Traveling body 21 Leg support stand 22 Base connection member 23 Box wheel 24 Outrigger jack 3 Leg part 31 Cylinder 32 Rod 4 Upper connection member 5 Planar position adjustment device 6 Traveling orthogonal direction moving member 7 Cross-shaped member 71 First girder member 72 Second girder member 8 Traveling direction moving member 9 Telescopic device 10 Reaction force plate 11 Telescopic device 12 Reaction force plate 13 Telescopic device 131 Rod 132 Cylinder 14 Lifting jig 141 Flat plate member 142 Wire 15 Suspension device 16 Kanzashi 17 Work vehicle 18 Temporary storage area R Rail T Excavation area B Bentonite

Claims (2)

A pair of traveling bodies arranged in parallel at intervals, leg portions disposed before and after the traveling direction of each of the pair of traveling bodies, and the leg portions adjacent to each other in a direction orthogonal to the traveling direction of the traveling body. A pair of upper connecting members to be connected, and a suspension device suspended from the pair of upper connecting members via a planar position adjusting device,
The leg portion has a telescopic device that expands and contracts in the vertical direction,
The heavy object construction apparatus, wherein the planar position adjusting device has a moving means for moving the suspension device in a traveling direction of the traveling body and a direction orthogonal to the traveling direction. In the heavy article erection device according to claim 1,
The heavy load erection device, wherein the suspension device includes a telescopic device that expands and contracts in a vertical direction, and a suspension jig that rotates in a horizontal plane with the telescopic device as a central axis.

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