JP4307680B2 - Beam positioning apparatus and beam positioning method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a beam positioning apparatus and a positioning method for positioning a beam lifted by a lifting machine such as a crane in a state where the beam is released from the lifting machine when the beam is installed between columns. .
[0002]
[Prior art]
In general, when precast concrete beams (hereinafter referred to as PC beams) are installed between columns, the PC beams are lifted up to the construction site with a crane or other hoisting machine, and the PC beams are suspended by the hoisting machine. In this condition (while leaving the load on the lifting machine), an operator who performs positioning work on the pillar performs positioning of the PC beam while giving instructions to the operator of the lifting machine wirelessly. After the work was finished, the lifting machine was released from the PC beam.
However, according to the above-described method, the positioning of the PC beam is performed directly while the PC beam is suspended by the lifting machine, so that the positioning operation is difficult. The accuracy was also poor.
[0003]
Therefore, in the invention described in Japanese Patent Application Laid-Open No. 11-172922, which is a publication of a patent application filed by the present applicant, a beam positioning device and a positioning method for solving the above-described problems have been proposed. In the present invention, as shown in FIG. 5, when the PC beam 10 is installed between the columns 11, 11, the PC beam 10 lifted by a crane or other lifting machine is positioned in a state where it is released from the lifting machine. In order to do so, both ends 10e, 10e side are installed on the concrete floor F corresponding to the position directly below the PC beam 10 lifted by the lifting machine so as to be positioned corresponding to the heads 11t, 11t of the pillars 11, 11. An XY table 50 for adjusting the horizontal position of the PC beam 10 in a state where the PC beam 10 is positioned above the head 11t of the column 11 while supporting the lower surface 10u of the PC beam 10. Alternatively, the position adjusting means such as the slide table 60 and the position adjusting means can be moved upward so that the PC beam 10 is located above the head 11t of the column 11, and the position adjusting means Up and down moving means (support 3A (support 3A) capable of moving the position adjusting means downward in order to place both ends 10e and 10e of the PC beam 10 on which the position adjustment in the horizontal direction has been completed on the head 11t of each column 11. 4) and a beam positioning device 1A, 1B comprising a jack 4A) are used. Then, with the lifting machine released from the PC beam 10, as shown in FIG. 6, the reinforcing bars 12 and 12A of the PC beams 10 and 10A are connected to each other by a connector 13 including a connection nut 13a and fixing nuts 13b and 13b. Positioning work required for fixing, that is, adjustment of the center position deviation in the horizontal direction (that is, the direction perpendicular to the paper surface of FIG. 6) between the reinforcing bars 12 and 12A of the PC beams 10, 10A (hereinafter referred to as deviation adjustment). ), And the distance between the ends of the reinforcing bars 12, 12A of the PC beams 10, 10A is adjusted so as to match the thread pitch of the connecting nut 13a so that the reinforcing bars 12, 12A can be connected by the connecting nut 13a (hereinafter referred to as pitch adjustment). Subtle adjustment work is possible. Reference numeral 10 denotes a PC beam to be positioned, 10A denotes a PC beam that has been constructed (positioning work completed), and the PC beam 10 (10A) has a plurality of reinforcing bars that protrude outwardly at the lower sides of both ends 10e and 10e. 12 (12A)... Is provided, and the reinforcing bar 12 (12A) functions as a reference material for positioning reference. Reference numeral 12B denotes a plurality of reinforcing bars implanted in the head 11t of the pillar 11. These reinforcing bars 12, 12A, 12B are threaded.
The specific procedure of the beam positioning method using the positioning devices 1A and 1B is as follows. First, the positioning devices 1A and 1B are moved between the pillars 11 and 11 and installed at a predetermined floor position (moved via the pulley 2a of the base plate 2 and the outrigger 2b is taken out and fixed to the concrete floor F). In this case, the positioning is performed so that the XY table 50 is positioned at a position directly below the one end 10m side of the PC beam 10 that is positioned with reference to the one end 10e side of the PC beam 10A that has already been positioned. The apparatus 1A is arranged, and the positioning apparatus 1B is arranged so that the slide table 60 is located at a position immediately below the PC beam 10 corresponding to the other end 10n side. The length of the inner rod 3b protruding from the outer cylindrical rod 3a is adjusted so that the position of the upper surface of each table 50, 60 substantially coincides with the position of the heads 11t, 11t of the pillars 11, 11. The length of 3A is adjusted in advance. Next, the piston 4a of the jack 4A is moved upward so that the tables 50 and 60 are moved to positions slightly higher than the positions of the heads 11t and 11t of the columns 11 and 11, respectively. In this state, the PC beam 10 is lifted by a lifting machine and placed on the tables 50 and 60. Thereafter, the XY table 50 is driven to adjust the position on the one end 10m side of the PC beam 10 with reference to the one end 10e side of the PC beam 10A. That is, deviation adjustment and pitch adjustment are performed. After the adjustment, the piston 4a of the jack 4 is retracted, the outrigger 2b is returned to its original position, and finally the reinforcing bar 12 of the PC beam 10 and the reinforcing bar 12A of the PC beam 10A are connected by the connecting nut 13a. Thereafter, the same process is repeated. After that, the concrete beams are poured by surrounding the PC beams where the positioning work is completed with a mold to form a continuous beam.
[0004]
[Problems to be solved by the invention]
However, the beam positioning devices 1A and 1B disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 11-172922 are provided with a base plate 2 and a support 3A as four struts, and are heavy and large. In addition, the construction work was also difficult. Further, since an expensive machine such as the XY table 50 is mounted, there is a problem that the cost is increased.
Further, according to the positioning method using the positioning devices 1A and 1B, the positioning devices 1A and 1B are heavy and large, so that the installation work is difficult. Also, in the positioning operation, an expensive machine such as the XY table 50 is used. However, there is a problem that the work is time consuming and the construction period cannot be shortened.
[0005]
[Means for Solving the Problems]
The beam positioning device according to the invention of the present application returns to the column head after moving at least one end side of the beam, which is released from the lifting machine and both ends are temporarily placed on the head of each column, above the column head. comprising a vertical movement means for, said vertical moving means, a jack, constituted by a single strut supporting the jack, between the jack and the support, of the beam by moving the jack in the horizontal direction It provided the position adjusting means for adjusting the position.
The beam positioning method according to the present invention uses at least one end side of the beam that has been moved above the head of the column by the vertical movement means after the temporary placement of the beam, using the beam positioning device provided with the vertical movement means. A force such as human power is applied to the beam, and the beam is moved and positioned by lifting the other side with the lower side of the vertical movement means in contact with the floor as a fulcrum.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. The same or corresponding parts as those in the conventional example of FIGS.
As shown in FIGS. 1 and 2, the beam positioning device 1 according to the first embodiment is a lifting machine such as a crane such that both ends 10e and 10e are positioned corresponding to the heads 11t and 11t of the pillars 11 and 11, respectively. It is installed on the concrete floor F corresponding to the position directly under the PC beam 10 being lifted, and is released from the lifting machine, and both ends 10e, 10e are temporarily placed on the heads 11t, 11t of the pillars 11, 11. The PC beam 10 is provided with a vertically moving means for moving the one end 10e side or both ends 10e, 10e side above the head 11t of the column 11 and then returning it to the head 11t of the column 11.
The up-and-down moving means includes a jack 4 and a single support 3 as a support column that supports the jack 4.
The support 3 is composed of, for example, a metal cylinder, a prism or the like. For example, the support 3 is configured such that the protruding length of the inner rod 3b protruding from the outer cylindrical rod 3a can be roughly adjusted stepwise by pinning (not shown). In addition, it is good also as a structure which can adjust the length finely by expanding / contracting the inner rod 3b with a screw mechanism, and the main point should just be comprised so that the whole length can be adjusted.
The jack 4 is fixed to the upper end of the support 3 and includes a piston journal 4p that can move up and down. The jack 4 may be of any type such as a hydraulic type, a hydraulic type, and a screw type. In each figure, a screw type jack that is driven by human power by inserting a handle lever (not shown) into the operation unit 4k is shown.
[0007]
Hereinafter, a beam positioning method using the positioning device 1 will be described.
The PC beam 10 is lifted by a lifting machine, both ends 10e, 10 are temporarily placed on the heads 11t, 11t of the pillars 11, 11, and the PC beam 10 is released from the lifting machine. The positioning devices 1 and 1 are installed by adjusting the length of the support 3 on the concrete floor F corresponding to the positions immediately below the both ends 10e and 10e of the temporarily placed PC beam 10. After that, as shown in FIG. 6, the displacement adjustment and the pitch adjustment are performed. However, in the case of the displacement adjustment of the reinforcing bars 12 and 12A, only one of the both ends 10e and 10e side of the PC beam 10 is adjusted. It can be carried out by lifting with a jack 4.
That is, the handle lever is inserted into the operation portion 4k of the jack 4 of the positioning device 1 installed on the side where the displacement adjustment is to be performed and turned to move the journal piston 4p of the jack 4 upward so that one side of the PC beam 10 is lifted. In this state, the operator moves the PC beam 10 by applying a human force by hooking a bar or the like to the reinforcing bar 12 of the PC beam 10. Then, force is applied to the support 3, and as shown in FIG. 3, the other 3Y side floats with the other 3Y side of the lower end of the support 3 in contact with the concrete floor F as a fulcrum (that is, the support 3 tilts in the direction of the force). The PC beam 10 moves. In this way, after adjusting the shift position, the journal piston 4p of the jack 4 is retracted and returned to return one side of the PC beam 10 to the head 11t of the column 11. In addition, as shown in FIG. 2, the both ends 10e and 10e side of the PC beam 10 may be lifted by the jack 4 to adjust the displacement.
In the case of adjusting the pitch between the reinforcing bars 12 and 12A, as shown in FIG. 2, the PC beams 10 are moved in the pitch adjusting direction after both ends 10e and 10e of the PC beam 10 are floated by the positioning devices 1 and 1, respectively. As described above, the support 3 of each positioning device 1, 1 is inclined in the direction of the force, and the PC beam 10 moves. After adjusting the pitch in this way, the journal piston 4p of the jack 4 is retracted and returned, and both ends 10e and 10e of the PC beam 10 are returned to the heads 11t and 11t of the columns 11 and 11, respectively.
That is, after the PC beam 10 is temporarily placed, a force such as human power is applied to at least one end 10e side of the PC beam 10 moved by the jack 4 above the head 11t of the column 11, and the concrete floor F The PC beam 10 is moved by tilting the support 3 by lifting the other 3Y side with the other 3Y side of the lower end of the support 3 in contact with the PC 3 as a fulcrum.
[0008]
According to the first embodiment, since the positioning device 1 is configured by the jack 4 and the single support 3 that supports the jack 4, the weight can be reduced, and since it is in the form of one bar, it is easy to carry. And erection work can be done easily. Moreover, since there are few structural members and expensive machines, such as an XY table, are not mounted, cost can also be reduced.
Also, in terms of positioning work, since at least one end 10e side of the PC beam 10 is lifted and a force such as human power is applied, the work becomes very simple. In addition, since an expensive machine such as an XY table is not used, it is possible to shorten the work time for machine operation and shorten the work period.
[0009]
In the positioning device 1 according to the first embodiment, it is desirable to use one support 3 because the work can be performed efficiently. However, a positioning device including two supports 3 may be used.
[0010]
Embodiment 2. FIG.
As shown in FIG. 4, a positioning device provided with a slide table 6 as a position adjusting means for moving the jack 4 in the horizontal direction and adjusting the position of the PC beam 10 between the jack 4 and the support 3. It may be 1X. In view of cost, the slide table 6 may be configured such that the upper slide plate 6a and the lower slide plate 6b made of only two metal plates slide as shown in FIG. desirable. The movable range on the jack 4 side is regulated so that the center of the jack 4 and the center of the support 3 are not separated too much.
The beam positioning method using the positioning device 1X according to the second embodiment is similar to that of the first embodiment. After the jacks 4 lift the both ends 10e, 10e or one side of the PC beam 10, the operator When the PC beam 10 is moved manually, the upper slide plate 6a slides on the lower slide plate 6b, so that the jack 4 moves in the horizontal direction and the PC beam 10 also moves in the horizontal direction. Therefore, it is possible to adjust the displacement and pitch of the PC beam 10.
[0011]
According to the positioning device 1X of the second embodiment, the same effect as the positioning device 1 and the positioning method of the first embodiment can be obtained. Further, the positioning accuracy can be improved as compared with the first embodiment.
[0012]
In the positioning device 1X of the second embodiment, the cost is high, but other slide tables such as an XY table may be used as the position adjusting means.
[0013]
Although depending on the distance between the columns 11 and 11 (in other words, the length of the PC beam 10), when this distance is short or not very long, only one positioning device 1 or 1X is used. It is also possible to perform the positioning work by installing it at the floor position corresponding to the lower surface (directly below the center) in the length direction of 10.
[0014]
In the positioning device 1 or 1X described above, the vertical movement means is constituted by the single support 3 and the jack 4. However, the vertical movement means may be constituted only by a jack having a long-stroke journal piston. Alternatively, the vertical movement means may be configured only by the support. Thus, when it comprises only a support, it is set as the structure which the inner rod 3b expands and contracts with a screw mechanism (for example, the structure like the support | pillar which stretches | hangs the volleyball net), and the length of the inner rod 3b is expanded and contracted. The length may be adjusted.
[0015]
Further, the positioning for connecting the threaded rebar 12 provided on the PC beam 10 with the connecting nut 13a in accordance with the rebar of the PC beam 10A has been described. The present invention can be applied even to positioning of a beam that does not include a beam.
[0016]
【The invention's effect】
As described above, according to the beam positioning device of the first aspect of the present invention, the weight can be reduced, the carrying becomes easy, and the installation work can be easily performed. Moreover, since there are few structural members and expensive machines, such as an XY table, are not mounted, cost can also be reduced. In addition, it is possible to shorten the work time such as operation of a machine such as an XY table, to realize the beam positioning method according to the present invention, and to shorten the work period. In particular, a di Yakki, by a positioning device having a vertical moving means comprising a single strut supporting the jack, can a single rod-shaped positioning device can improve the effects. Between the di Yakki and struts, to move the jack in the horizontal direction by providing the position adjusting means for adjusting the position of the beam can improve the accuracy of the positioning.
Further, according to the beam positioning method of the present invention, it is only necessary to lift at least one end side of the beam by the vertical movement means and apply a force such as human power, and the work becomes very simple. It is not necessary to use an expensive machine, work time for machine operation and the like can be shortened, and the construction period can be shortened.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a beam positioning device and a positioning method according to a first embodiment of the present invention.
FIG. 2 is an explanatory diagram of a beam positioning device and a positioning method according to Embodiment 1;
FIG. 3 is an explanatory diagram of a beam positioning method according to the first embodiment.
FIG. 4 is a diagram showing a beam positioning device according to a second embodiment of the present invention.
FIG. 5 is an explanatory diagram of a conventional beam positioning apparatus and positioning method.
FIG. 6 is an explanatory diagram of a conventional beam positioning method.
[Explanation of symbols]
1,1X positioning device, 3 support, 4 jack, 6 slide table (position adjustment means), 10 PC beam, 11 pillars.

Claims (2)

A beam positioning device for positioning a beam lifted by a lifting machine such as a crane in a state where it is released from the lifting machine when laying the beam between columns,
It is installed on the floor corresponding to the position directly below the beam that is lifted by the lifting machine so that both ends are positioned corresponding to the heads of the pillars,
Up and down moving means for returning to the head of the pillar after moving from above the head of the pillar at least one end side of the beam released from the lifting machine and temporarily placed on both ends of the head of each pillar ;
The up-and-down moving means is composed of a jack and a single column supporting the jack,
A beam positioning apparatus comprising: a position adjusting means for adjusting the position of the beam by moving the jack in a horizontal direction between the jack and the column . A beam positioning method for positioning a beam lifted by a crane or other lifting machine in a state where it is released from the lifting machine when laying a beam between columns,
It is installed on the floor corresponding to the position directly below the beam that is lifted by the lifting machine so that both ends are located corresponding to the heads of the pillars. Using a beam positioning device provided with a vertically moving means for returning to the head of the pillar after moving at least one end side of the beam temporarily placed from the head of the pillar,
After the temporary placement, a force such as human power is applied to at least one end side of the beam moved upward from the head of the column by the vertical movement means, and by this force, one of the lower ends of the vertical movement means in contact with the floor A beam positioning method characterized by positioning a beam by moving the beam by floating the other side with the side as a fulcrum.

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