JPH1162254A - Beam positioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve accuracy and efficiency of positioning work in providing a beam between columns by lifting the beam by a crane or the like, placing both end sides on head parts of the columns, positioning it in a released condition from the lifting machine, and pressing the beam in a horizontal direction. SOLUTION: Side plates 2, 2 facing side surfaces of a PC beam, a base plate 3, and counter-column parts 4, 4 protruded from both ends 3s, 3s of the base plate horizontally to face both side surfaces of a column are disposed. In this case, beam end surface pressing parts 5, 5 protruded upward from the counter- column parts 4, 4, and having pressure surfaces 5a to be applied to end surfaces of the PC beam are provided. Cuts 5s are formed on the back side of the beam end surface pressing parts 5, 5 to avoid interference with reinforcements of the columns, and hydraulic jacks 6A, 6A are installed on inner sides 2u of the side plates 2, 2. Horizontal pressure is applied to the side surfaces of the PC beam roughly perpendicularly to an extension direction of the PC beam, so side surface positions of the PC beam to the columns are adjusted. Beam positioning work can thus be efficiently performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of erection of a beam between columns by releasing a beam which is lifted by a lifting machine such as a crane and has both ends placed on the head of each column. The present invention relates to a beam positioning device for performing positioning in a state where the beam is positioned.

[0002]

2. Description of the Related Art Generally, when a precast concrete beam (hereinafter, referred to as a PC beam) is erected between pillars, the PC beam is lifted to a construction site by a crane or other hoisting machine and the PC beam is lifted.
Both ends of the beam are placed on the heads of each pillar, and the PC beam is suspended by the crane (with the load on the crane) and the operator of the crane is instructed by radio or the like. The PC beam was positioned while being given, and after this positioning operation was completed, the lifting machine was released from the PC beam.

[0003]

However, according to the conventional method as described above, since the positioning operation of the PC beam is performed while the PC beam is suspended by the hoist, the positioning operation is difficult. Also, it is not possible to make fine position adjustments,
Positioning accuracy was also poor. In addition, the lifting machine must be restrained until the PC beam positioning work is completed.
Furthermore, the worker is in a waiting state until the next PC beam is lifted to the construction site after the completion of the positioning operation of the PC beam, so that there is a problem that the work efficiency is low.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a beam positioning device which can easily perform a beam positioning operation, has high positioning accuracy, and can efficiently perform a beam positioning operation. .

[0005]

According to the beam positioning device of the present invention, when a beam (PC beam 10) is erected between the columns 11, 11, the beam is lifted by a lifting machine such as a crane R and both ends 10e. , 10e is a beam positioning device 1 for positioning a beam placed on the heads 11t, 11t of the columns in a state where the beams are opened from the lifting machine, and is installed on the head side of the columns. And a position adjusting means for adjusting the position of the beam by horizontally pressing the beam placed on the head of each column at both ends. Also,
Both ends are provided with beam vertical moving means (hydraulic jacks 6C, 6C) capable of vertically moving the beam placed on the head of each column. Further, the first position adjusting means (hydraulic jack) adjusts the position of the beam by applying a horizontal pressing force to the side faces 10s, 10s of the beam in a direction substantially perpendicular to the extending direction of the beam. 6
A, 6A) and second position adjusting means for adjusting the position of the end face of the beam relative to the column by applying a horizontal pressing force to the end faces 10f, 10f of the beam substantially in the same direction as the extending direction of the beam. . Further, the second position adjusting means is provided on a base plate 3 facing one side surface 11x of the head of the column, and is a pressing means (a hydraulic jack 6) for pressing one side surface of the column.
B) a pressing portion extending from the base plate and facing the end face of the beam, and pressing the end face of the beam horizontally in substantially the same direction as the extension direction of the beam by a reaction force generated by the pressing force of the pressing means ( Beam end surface pressing portions 5, 5). Also,
Friction reducing means (sliding mechanism 6) for smoothing horizontal movement of the beam by the position adjusting means is provided at a portion where both ends are opposed to the lower surface 10u of the beam placed on the head of each pillar.
0).

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a beam positioning device according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a beam positioning device according to the present invention. Also,
FIG. 2 is a side view showing a state in which a PC beam is positioned on a pillar using a positioning device. FIG. 3 is a plan view of FIG.
3 is a view seen from the direction A in FIG. 3, and FIG. 5 is a view seen from the back side of FIG. 6 to 8 show P using a positioning device.
It is the figure which demonstrated the construction method of C beam in order.

In each figure, 1 is a beam positioning device according to the present invention, 10 is a PC beam being constructed, 10A is a constructed PC beam, and 11 is a column. The positioning device 1 is shown in FIG.
As shown in (b), the head 11t, 1 of each pillar 11, 11
It is installed on the 1t side. PC beam 10 is shown in FIG.
As shown in (c), both ends 10e, 10e side are each pillar 1.
1, 11 are placed on the heads 11t, 11t. Note that both end faces 10f, 10f of the PC beam 10 and the pillar 11
A plurality of reinforcing bars 12, 12... As shown in FIG. 9 (the positioning device 1 is not shown in FIG. 9), the reinforcing bars 12 projecting from the PC beams 10 and the columns 11 are threaded.

As shown in FIGS. 1 to 5, the positioning device 1 is composed of side plates 2 and 2 facing the side surfaces 10s and 10s of the PC beam 10 and bridging the side plates 2 and 2.
0, a base plate 3 facing one side surface 11x of the bottom 11u and the head 11t of the column 11, and both side surfaces 1 of the column 11 projecting horizontally from both ends 3s, 3s of the base plate 3.
1s, 11s, and the column opposing portions 4, 4 projecting upward from the column opposing portions 4, 4 and end faces 10 of the PC beam 10.
It has beam end surface pressing portions 5 and 5 as pressing portions having a pressing surface 5a that comes into contact with f. In addition, a notch 5 s is formed on the back side of the beam end surface pressing portions 5, 5 to avoid interference with the reinforcing bar 12 of the column 11.

A piston 6a and a cylinder 6b, which are driven to expand and contract by hydraulic pressure, are provided on the inner side 2u of the side plates 2 and 2, respectively.
Hydraulic jacks 6A, 6A are provided.
1st position adjusting means for adjusting the position of the side surfaces 10s, 10s of the PC beam 10 with respect to the column 11 by applying a horizontal pressing force substantially perpendicular to the extension direction of the PC beam 10 to the side surfaces 10s, 10s of the PC beam 10. .

A hydraulic jack 6B as a pressing means for applying a pressing force to the column 11 is provided on a surface 3b of the base plate 3 facing one side surface 11x of the column 11,
By the hydraulic jack 6B and the beam end surface pressing portions 5 and 5, the PC beam 10 is attached to the end surfaces 10f and 10f of the PC beam 10.
A second position adjusting means for adjusting the positions of the end faces 10f, 10f of the PC beam 10 with respect to the column 11 by applying a horizontal pressing force substantially in the same direction as the extension direction of the PC beam 10 is provided. This utilizes the principle that the end face 10f of the PC beam 10 is pressed by the beam end face pressing portions 5 and 5 by the reaction force due to the pressing of the hydraulic jack 6B against the column 11, and the PC beam 10 is moved in the extension direction of the PC beam 10. By pressing horizontally in the same direction as above, the positions of the end faces 10f, 10f of the PC beam 10 with respect to the columns 11, 11 are adjusted.

Further, on the upper surface 3t of the base plate 3,
As shown in FIGS. 1, 3, and 4, hydraulic jacks 6C and 6C are separately provided on the left and right sides of the PC beam 10 with respect to the center S of the PC beam 10, respectively. These two hydraulic jacks 6C, 6C constitute a PC beam vertical moving means capable of moving the PC beam 10 up and down.

As shown in FIGS. 1, 10 and 11, on the upper portions of the pistons of the hydraulic jacks 6C, 6C, the first position adjusting means smoothes the horizontal movement of the PC beam 10. A slide mechanism 60 is provided as friction reducing means. This slide mechanism 60 is similar to that shown in FIG.
As shown in FIG. 1, a hole 6 smaller than the diameter of the rotary sliding ball 61
2 are a plurality of lids 63 formed at random, and a plurality of rotating sliding balls 61, 61.
2. It is formed by sealing so as to protrude and rotate.

The structure of the hydraulic jack 6B is the same as that of the hydraulic jack 6A, and the structure of the hydraulic jack 6C is the same as that of the hydraulic jack 6A except that a slide mechanism 60 is provided on the upper part. 14a is a hydraulic jack 6
A and B 14b are reaction force receivers for protecting the column 11 from the reaction force caused by the operation of the hydraulic jacks 6C and 6C. (See FIGS. 3 to 5). In addition, the positioning device 1 is provided with a fixing tool 4 such as a fixing screw which is threaded through the column facing portions 4 and 4 and whose tip is pressed against the column 11.
S, two pillars 1 on which the PC beam 10 is to be erected
The fixing parts 4S are previously attached to the heads 11t, 11t sides of the heads 1 and 11 (the fixing tool 4S is not shown except in FIG. 1).

Further, after the positioning operation by the positioning device 1 is completed, the beam end surface pressing portions 5, 5, 5 are arranged so that the positioning device 1 can be removed from the column 11.
Can be separated via the connecting portion 5X. This is because, when separated, the main body of the column 11 is attached to the head 1 of the column 11 so that the main body of the positioning device 1 does not fall off the column 11.
Each beam end surface pressing portion 5, 5 so that a portion to be caught at 1t remains.
Are separated from each other via the connecting portion 5X. Actual connection / disconnection can be realized by providing an engagement means or the like. Note that, for example, a connection portion may be provided on the base plate 3 so that the base plate 3 can be separated, or the beam end surface pressing portions 5 and 5 themselves can be separated. The point is that the positioning device 1 may be detached from the column 11 after the positioning operation by the positioning device 1 is completed.

Next, the operation of the beam positioning device 1 according to the present invention will be described. In the present embodiment,
Finally, the reinforcing bar 12 of the PC beam 10 under construction and the reinforcing bar 12 of the PC beam 10A which have been constructed are connected and fixed by the connecting tool 13 including the connecting nut 13a and the tightening nuts 13b, 13b as shown in FIG. Therefore, the positioning operation of the positioning devices 1 and 1 by the first and second position adjusting means and the vertical moving means is performed to adjust the position of the reinforcing bar 12 of the PC beam 10 to the position of the reinforcing bar 12 of the PC beam 10A. Will be

First, from the state shown in FIG.
When the C beam 10 is to be erected, the heads 11t, 11 of the two columns 11, 11 on which the PC beam is to be erected
The positioning device 1 is fixed to the t side as shown in FIG. This is fixed by the fixing tool 4S described above. Next, as shown in FIG.
Is lifted by a crane R, and both ends 10e, 10e are placed on the heads 11t, 11t of the columns 11, 11, respectively. In this case, it is only necessary to roughly set the both ends 10e of the PC beam 10 so as to fit in the positioning devices 1, 1. Then, the crane R is opened, and thereafter, the positioning operation is performed using the positioning device 1.

The positioning operation is performed as shown in FIGS. 7 (a) to 7 (c). First, as shown in FIG. 7 (a), the PC beam 10 roughly set is moved by the hydraulic jacks 6A, 6A as the first position adjusting means in the horizontal direction substantially perpendicular to the extension direction of the PC beam 10. Adjust the position of. FIG.
FIG. 7 (a) is a view from above. In FIG. 7 (a), if the PC beam 10 is shifted downward in the figure, the lower hydraulic jack 6A is extended to extend the PC beam 10. Press to the top of the figure. At this time, the upper hydraulic jack 6A
If it is necessary to reduce the size, it may be reduced. In this way,
As shown in FIG. 3, in the horizontal direction perpendicular to the extension direction of the PC beam 10, the position of the reinforcing bar 12 of the PC beam 10 under construction and the position of the reinforcing bar 12 of the completed PC beam 10A can be accurately matched. Note that, in this case, the hydraulic jacks 6C, 6C are extended so that the rotating sliding balls 60, 60.
The adjustment by the first position adjusting means may be performed by sliding the PC beam 10 in a state where the PC beam 10 is in contact with the lower surface u of the C beam 10.

Next, as shown in FIG.
2 of each positioning device 1, 1 attached to
Position adjustment is performed by the hydraulic jack 6B, which is a position adjusting means, and the beam end surface pressing portions 5 and 5. In this case, FIG.
(B) The end face 10f of the PC beam 10 at the beam end face pressing portions 5, 5 is drawn by a dotted line due to the reaction force generated by extending the hydraulic jack 6B of the positioning device 1 on the right side and pressing one side surface 11x of the head 11t of the column 11. Pressed in the direction of the arrow. Thereby, the adjustment can be performed as indicated by the solid arrow. In this case, the second position adjusting means of the right positioning device 1 can adjust the PC beam 10 by moving the PC beam 10 in the left direction, but cannot perform the adjustment to move the PC beam 10 in the right direction. Is adjusted by moving the PC beam 10 rightward by the second position adjusting means of the left positioning device 1. This adjustment is performed by the connecting tool 13 as shown in FIG.
In order to connect the reinforcing bar 12 of the PC beam 10A to the reinforcing bar 12 of the PC beam 10A, the distance between the reinforcing bar 12 of the PC beam 10 and the tip of the reinforcing bar 12 of the PC beam 10A is formed inside the connection nut 13a of the connecting tool 13. This is performed in order to adjust the screw pitch (in other words, the pitch of the screw formed on the outer periphery of the reinforcing bar). When the adjustment by the second position adjusting means is performed, since the PC beam 10 is already sandwiched between the hydraulic jacks 6A, 6A of the first position adjusting means, and the positioning device 1 does not come off, the fixing tool 4S is used. Is loosened so that the positioning device 1 can be moved in the direction of arrow X in FIG. In the case of the second position adjusting means according to the present embodiment, since the PC beam 10 is moved by moving the positioning device 1 itself with respect to the column 11, in the case of the adjustment by the second position adjusting means, The slide mechanism 60 is not required.

Finally, the reinforcing bar 12 of the PC beam 10 is
When the PC beam 10 is displaced to the lower position with respect to the reinforcing bar 12A, the PC beams 10 are moved upward or downward by expanding and contracting the hydraulic jacks 6C, 6C, which are vertical moving means, as shown in FIG. 7C. The vertical displacement between the reinforcing bar 12 of the PC beam 10 and the reinforcing bar 12 of the PC beam 10A is adjusted. In this case, as described above, the hydraulic jacks 6C, 6C are provided to correspond to the left and right sides of the PC beam 10 with the center S of the PC beam 10 as a boundary, respectively. Can be moved up and down separately, and the vertical displacement can be adjusted separately on the left and right sides of the PC beam 10. in this way,
Since two hydraulic jacks 6C, 6C are provided, PC
If the left and right sides of the beam 10 have different shape accuracy,
This is effective when the accuracy of the plane horizontality of the head 11t of the column 11 is poor.

Incidentally, since the PC beam is basically formed in the same shape, the vertical displacement of the reinforcing bar often does not matter so much. Therefore, in such a case, the vertical moving means is not necessarily required. In this case, the sliding mechanism 20 as the friction reducing means is replaced by the hydraulic jack 6 as the vertical moving means.
C and 6C, the slide mechanism 2
0 may be provided in a portion facing the lower surface 10u of the PC beam 10, that is, in an upper portion of the base plate 3. Also,
Other means such as a roller mechanism may be used as the friction reducing means. In short, any means can be used as long as the horizontal movement of the PC beam 10 by the first position adjusting means can be smoothed. It is desirable to provide the friction reducing means. However, if the PC beam 10 can be moved smoothly in the horizontal direction by using only the first position adjusting means, it is not always necessary to provide the friction reducing means. As described above, it is not necessary to provide the vertical moving means and the friction reducing means in some cases.
A position adjusting means composed of first and second position adjusting means for adjusting the position by pressing in the horizontal direction is indispensable.

By the above adjustment, the reinforcing bar 12 of the PC beam 10 is
The displacement of the reinforcing bar 12 of the PC beam 10A with the reinforcing bar 12 is adjusted, and as shown in FIG.
The rebar 12 of the C-beam 10A can be connected and fixed with the connecting tool 13. Then, as shown in FIG. 8B, the process returns to the first step, and the same steps are repeated thereafter. After that, although not directly related to the present application, a continuous beam is obtained by surrounding concrete spaces between the PC beams and injecting concrete. The hydraulic jack 6
After the rebars 12 and 12 are connected and fixed with the connecting tool 13 in this state after the vertical adjustment by C and 6C, each hydraulic jack 6A
6C are all contracted, and the end portions of the beam end surface pressing portions 5 and 5 are separated by the connecting portion 5X, and the positioning device 1 is not removed, thereby completing the positioning operation of the PC beam.

After all, the positioning device 1 according to the present embodiment
The hydraulic jacks 6A, 6A which apply horizontal pressing force to the side surface 10s of the PC beam 10 in a direction substantially perpendicular to the extension direction of the PC beam 10 to adjust the position of the side surface 10s, 10s of the PC beam with respect to the column 11 (1) Reinforcing bar 12 of PC beam 10 being positioned and PC beam 10 already installed by one position adjusting means
A first function capable of adjusting a deviation from the reinforcing steel 12 of A in a horizontal direction perpendicular to the extension direction of the PC beam, and a horizontal surface substantially parallel to the extension direction of the PC beam 10 on the end faces 10f, 10f of the PC beam 10. PC to pillar 11 by applying pressing force
Hydraulic jack 6B for adjusting the position of end face 10f of beam 10
A second function of adjusting the distance between the reinforcing bar 12 of the PC beam and the tip of the reinforcing bar 12 of the PC beam 10A by the second position adjusting means including the beam end surface pressing portions 5 and 5; The rebar 12 of the PC beam and the rebar 1 of the PC beam 10A are moved up and down by hydraulic vertical jacks 6C, 6C.
And a third function capable of adjusting a vertical displacement with respect to the second function.
Further, by the friction reducing means including the slide mechanism 60,
It has a function of smoothing the horizontal movement of the PC beam 10 by the first position adjusting means.

In the above-described embodiment, the position is adjusted by the pressing force of the hydraulic jack.
A pressing screw may be provided instead of the hydraulic jack, and the position may be adjusted by the pressing force of the pressing screw. In this case, when the second position adjusting means is constituted by pressing screws provided on the beam end surface pressing portions 5, 5, the sliding mechanism 60 is used.
Functions as friction reducing means for smoothing the horizontal movement of the PC beam 10 by the second position adjusting means,
Even in this case, if the PC beam 10 can be moved smoothly in the horizontal direction, the friction reducing means is not necessarily required.

[0024]

As described above, according to the beam positioning apparatus of the present invention, the beam positioning operation can be performed with high accuracy.
In addition, there is an effect that the positioning operation can be performed efficiently and the positioning operation can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a beam positioning device according to the present invention.

FIG. 2 is a side view showing a state where a PC beam is positioned on a pillar using a positioning device.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a diagram viewed from a direction A in FIG. 3;

FIG. 5 is a view seen from the back side of FIG. 4;

FIG. 6 is a construction process diagram showing a procedure in a stage before a positioning operation by the positioning device.

FIG. 7 is a construction process diagram showing a procedure of a positioning operation by the positioning device.

FIG. 8 is a construction process diagram showing a procedure after completion of a positioning operation by the positioning device.

FIG. 9 is a diagram showing details of a reinforcing bar and a connection tool.

FIG. 10 is a top view of a slide mechanism provided on top of the hydraulic jacks 6C, 6C.

FIG. 11 is an enlarged cross-sectional view taken along line AA of FIG. 10;

[Explanation of symbols]

1 Positioning device, 6A, 6A Hydraulic jack (first position adjusting means), 6B hydraulic jack (pressing means of second position adjusting means), 5, 5 Beam end face pressing part (pressing part of second position adjusting means), 6C , 6C Hydraulic jack (beam vertical moving means), 10 PC beam under construction, 10A PC already constructed
Beam, side surface of 10s PC beam, end surface of 10fPC beam, 10
u PC beam underside, 11 pillars, 11t pillar head, 60
Slide mechanism (friction reducing means).

Claims (5)

[Claims] When laying a beam between columns, a beam lifted by a crane or other hoist and placed on the head of each column at both ends is positioned in a state where the beam is open from the hoist. A beam positioning device, which is installed on the head side of each of the columns, and adjusts the position of the beams by horizontally pressing the beams placed on the heads of the respective columns at both ends. A beam positioning device comprising a position adjusting means for adjusting the position of the beam. 2. The beam according to claim 1, further comprising beam vertical movement means capable of vertically moving the beam placed on the head of each column at both ends. Position adjustment device. 3. The first position adjusting means for applying a horizontal pressing force to the side surface of the beam in a direction substantially perpendicular to the extending direction of the beam to adjust the position of the side surface of the beam with respect to the column; 2. A second position adjusting means for applying a horizontal pressing force to the end face of the beam substantially in the same direction as the extension direction of the beam to adjust the position of the end face of the beam with respect to the column. A beam positioning device as described. 4. The pressing device according to claim 1, wherein the second position adjusting means is provided on a base plate facing one side surface of the column head and presses one side surface of the column. And a pressing portion facing the end surface of the beam and pressing the end surface of the beam horizontally in substantially the same direction as the extension direction of the beam by a reaction force generated by the pressing force of the pressing means. 4. The beam positioning device according to 3. 5. A friction reducing means for smoothing a horizontal movement of a beam by said position adjusting means at a portion where both ends are opposed to a lower surface of said beam placed on the head of each pillar. The beam positioning device according to claim 1, 2 or 3, wherein: