JPH09105233A - Mechanism for hoisting on-ground assembled floor for double-up for driving floor leading rise type construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the level adjustment by supporting a lower fitting with a hoisting rod, which is suspended from an upper fitting, and supporting an upper part of the hoisting shaft with the lower fitting freely to be moved in the vertical direction, and hoisting a floor, which is assembled on the ground, with the hoisting shaft through a hoisting tool. SOLUTION: An upper fitting 7 is placed on a flange of a large beam 6 of a driving floor so as to ride over it in the cross direction. An upper part of two hoisting rods 8 are respectively fitted to the upper fitting 7 by a double nut 9 so as to be hoisted in parallel with each other. A lower fitting 10 is fitted to a lower part of the hoisting rods 8 by a double nut 11, and while a hoisting shaft 12 is fitted to an intermediate position of the hoisting rods 8 by a double nut 14 so as to pass through the lower fitting 10. A hoisting tool 15 is connected to a lower part of the hoisting shaft 12 by screwing. A hoisting part 20, which is provided in the top surface of the flange of a steel framed beam 19 of a floor assembled on the ground, is pinched by the hoisting tool 15, and a pin 21 is inserted for connection. Level adjustment of the height position of the floor, which is assembled on the ground, can be easily performed by turning the nut 14 in the normal direction or the reverse direction so as to move the hoisting shaft 12 in the vertical direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-up ground floor hanging mechanism for use in a drive-floor first-rise building method.

[0002]

2. Description of the Related Art The drive floor, which is finally the top floor of a building, is first assembled on the ground, and the drive floor is moved up along the main pillars to be used as a roof substitute and used as a central platform for construction work. For example, Japanese Patent Laid-Open No. 3-81434 and Japanese Patent Laid-Open No. 4-231 disclose a driving-floor advance ascending type construction method in which the construction work of each floor is sequentially advanced from the bottom to the top in a stacked manner.
529, JP-A-4-231530, JP-A-4-28
They are described in Japanese Patent Publication No. 1961 and the like, and are well known and well known.

As another feature of the construction method, the construction work on each floor is performed on the ground floor of the next upper floor 3 on the permanent floor 2 directly below the driving floor 1, as illustrated in FIGS. 4A and 4B. Assembling is performed (FIG. 4A), the ground floor 3 is hung on the driving floor 1 by the hanging mechanism 4, and the ground floor is unitarily lifted (step 4B) along with the preceding ascent process of the driving floor 1 and its mounting position. It will be lifted to the (next upper floor position) and joined to the pillar to form the permanent floor. Reference numeral 5 in FIG. 4 indicates a permanent pillar.

Therefore, the ground floor suspension mechanism plays an important role in the construction of the drive floor preceding ascending type construction method.

[0005]

The conventional ground floor suspension mechanism has a structure in which the large beam on the drive floor and the beam on the ground floor are simply connected by a high tension wire. For this reason, there are the following problems, which are problems to be solved. Level adjustment is difficult. Since the ascending operation of the driving floor is performed by a hydraulic jack type lifting device that repeats the operation like a so-called scale insect by taking a reaction force to the main installation column, it is several mm to several mm.
Level adjustment in cm increments is almost impossible due to control. For this reason, it was extremely difficult to adjust the level of the mounting position of the ground floor. It is difficult to separate and release the suspension mechanism from the ground floor. As described above, the drive floor is lifted by the hydraulic jack type lifting device, which is essentially configured for lifting motion, and it is difficult to control it to move it down a little if necessary. For this reason, the conventional suspension mechanism using wires is used to perform the releasing work to remove the wires from the ground floor after the main floor floor is joined to the pillar, while hanging it on the driving floor (while the tension load is still applied). There was no choice but to do so, the work of uncoupling was extremely difficult, and there was a risk when releasing the tension. The tensioning mechanism cannot be pretensioned at the beginning when the ground floor is raised together with the driving floor, and so-called ground cutting (or ground separation, floor separation) cannot be performed smoothly. As I have repeatedly explained, the lifting of the drive floor is performed by the hydraulic jack type lifting device, but it is dangerous to suddenly apply a large load to the hydraulic device, and it is necessary to ensure smooth lifting operation. hard. That is, in the case of a suspension mechanism composed of a wire connecting the driving floor and the ground floor, the lifting operation of the driving floor must be started from the state where the wire is actually loose, that is, the state where the tension is zero. There was a problem that the load was not balanced and was jerky when cutting the ground. Since a large suspension load of about 20 tons acts on one suspension mechanism, it is the actual situation that there is no suitable means for withstanding such a large load and pretensioning the wire.

Therefore, an object of the present invention is that the level can be easily adjusted and so-called double-up operation can be performed together with the raising of the driving floor, so that the ground cutting can be smoothed at the beginning of raising the ground floor. It is possible to apply the pre-tension of the above, and it is possible to release the tension for the release work by disconnecting the foundation floor after the main joining to the position of the installation floor, and it is possible to easily release the tension for the double up foundation floor hanging mechanism. Is to provide.

[0007]

As a means for solving the above-mentioned problems, a double-up ground floor suspension mechanism for a drive-floor preceding rise-type construction method according to the invention of claim 1 is attached to the drive floor. A hanging rod is hung from the upper metal piece, and the lower metal piece is supported by the hanging rod; and a hanging shaft that vertically penetrates the lower metal piece is provided, and the upper part of the hanging shaft is installed on the lower metal piece. It is supported by a nut that is screwed in via a thrust bearing that can be finely adjusted in the vertical direction (level adjustment). A suspending tool is provided under the suspension shaft, and the ground floor is suspended by the suspending tool. It is characterized by being.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The ground floor hanging mechanism of the present invention is implemented by connecting a large beam on a drive floor and a beam on the ground floor.
In addition, as shown in FIG. 5, it is used by being intensively installed in the vicinity of the main installation column 5. Based on consideration to reduce the bending load of each beam as much as possible. As a preferred embodiment of the hanging mechanism,
The two hanging rods are arranged in parallel so that the upper metal member and the lower metal member are stably supported at both ends. On the other hand, the suspension shaft is 2
One suspension rod is arranged at an intermediate position so that the load of the ground floor floor is evenly applied to the two suspension rods on both sides through the central suspension shaft. It is carried out on a scale where a load of about 6 tons to 10 tons is applied to one suspension rod.

By rotating a nut (double nut) for supporting the upper part of the suspension shaft to a lower metal object with a wrench or the like, the height position of the ground floor is moved from a fraction of a few mm to a few cm as a screw movement.
It is possible to adjust the level over the range. Therefore, level adjustment (double up) for the mounting position of the ground floor, which is difficult to match only with the hydraulic jack type lifting device on the drive floor, can be performed easily, accurately and quickly with the necessary and sufficient adjustment width. , Contribute to the improvement of construction accuracy, quality, and efficiency. Also, after connecting the large beam on the driving floor and the beam on the ground floor by the suspension mechanism,
Again, the fastening force of the nut can be increased by adjusting the level of turning the nut, and a pretension of an appropriate amount for smooth ground cutting can be applied to the suspension mechanism. On the contrary, after permanently connecting the ground floor to the installation floor and then disconnecting and releasing the suspension mechanism from the ground floor, loosen the nut tightening force in the same way as adjusting the level by turning the nut, and attach it to the suspension mechanism. The tension (suspension load) that is acting can be completely eliminated, and the work of uncoupling can be performed easily and safely.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention. The double-up groundwork floor hanging mechanism of the present invention shown in FIGS. 1 to 3 is symmetrical to both ends of the upper metal fitting 7 placed on the flange so as to straddle the girder 6 on the driving floor in the width direction. In the arrangement, the upper parts of the two suspension rods 8 and 8 are attached by double nuts 9 and suspended vertically downward and in parallel. The hanging rod 8 has a length of about 8.3 m and an outer diameter of 35 mm.
Steel rod having a diameter of about 32 mm and a length of 160 mm at both upper and lower ends thereof. The upper metal piece 7 is a welded assembly made of a steel plate.

A lower metal member 10 is horizontally attached to the lower part of the two suspension rods 8 by a double nut 11 as well. This lower metal part 10 is also a welded assembly of steel plates. A suspension shaft 12 is provided at a central portion of the lower metal product 10, that is, at an intermediate position between the two suspension rods 8 and 8 so as to vertically penetrate the lower metal product 10 downward. The suspension shaft 12 is a steel rod having a length of about 48 cm and a diameter of about 65 mm. As shown in the structural details in FIG. 3, the upper portion of the suspension shaft 12 is suspended and supported by a double nut 14 via a thrust bearing 13 installed on the upper surface of the lower metal member 10. Also,
A fork 15 having a two-pronged shape is screwed to the lower portion of the suspension shaft 12, and is further provided integrally with a lock nut 16 and a pin 17 so as to be separated from each other. The forked portion 2 provided on the upper surface of the flange of the steel beam 19 of the ground floor 3, which is a fork of the hanging device 15.
The connection is performed by inserting 0 and inserting the connecting pin 21.
A retaining pin 22 is inserted into the tip of the connecting pin 21.

Therefore, by connecting / disconnecting the connecting pin 21, the suspension shaft 12 and the ground floor 18 can be connected or disconnected freely with one touch. Further, by rotating the nut 14 screwed into the upper portion of the suspension shaft 12 in the forward and reverse directions, the height position of the suspension shaft 12 as a screw motion, and by extension, the height of the ground floor 3 suspended and supported by the suspension shaft 12. Level adjustment (double up) can be performed. In that case, a suspension load (load of the ground floor) of about 10 to 20 tons is applied to the suspension shaft 12,
Since the rotational resistance of the nut 14 is significantly reduced by the thrust bearing 13, the work of turning the nut 14 with a wrench or the like is not a burden to human labor.

[0013]

[Advantageous Effects of the Invention] When the double-up ground floor lifting mechanism according to the present invention is applied to the drive floor preceding ascending type construction method, an appropriate pretension is applied to the lifting mechanism in advance at the time of raising the ground floor. As a result, ground cutting (ground separation) of the ground floor can be performed smoothly and safely. Also, at the stage where the ground floor is raised to the position of the mounting floor, level adjustment (double up) can be easily performed to make the height of the ground floor exactly match the mounting position while keeping the driving floor stationary. Therefore, the workability of positioning is improved and the quality and accuracy of construction work are improved.

Further, after the foundation floor is permanently connected to the mounting position, the tension (suspension load) acting on the suspension mechanism is temporarily released to zero, and then the suspension mechanism and the foundation structure are permanently constructed. By performing the work for releasing the connection with the floor, the work can be performed safely, easily and efficiently.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire structure of a suspension mechanism according to the present invention.

FIG. 2 is an elevational view showing a usage state of the upper hanging mechanism.

FIG. 3 is an enlarged sectional view of a suspension shaft portion.

4A and 4B are elevation views showing an assembling process and an ascending process of a ground floor, in particular, of a drive floor preceding ascending type construction method.

FIG. 5 is a conceptual diagram showing the arrangement of a suspension mechanism that connects the drive floor and the ground floor.

[Explanation of symbols]

 1 Driving floor 3 Ground floor 6 Large beam 7 Upper hardware 8 Suspension rod 10 Lower hardware 12 Suspension shaft 13 Thrust bearing 14 Nut 15 Suspension tool 19 Beam

Claims (1)

[Claims] 1. A suspension rod is hung from an upper hardware attached to a drive floor, a lower hardware is supported by the suspension rod, and a suspension shaft is provided which vertically penetrates the lower hardware. The upper part of is supported by a nut screwed through a thrust bearing installed in the lower metal part so that fine adjustment in the vertical direction is possible, and a hanger is provided at the lower part of the hanging shaft. A double-up ground floor suspension mechanism for a drive floor preceding ascent type construction method, characterized in that the floor is hung.