JP2648904B2 - Method of assembling beam rebar and work support for it - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a beam rebar and a work column therefor.

[0002]

2. Description of the Related Art When laying a beam reinforcing bar, a pair of facing working columns, which are conventionally prepared as multi-types having different heights, are set up at predetermined intervals on a ground of a work site. Several upper main reinforcements were placed in parallel on the reinforcing bar support bar laid across each pair of the columns, and a large number of star wraps were hung on this bar, and then suspended.
By binding the upper main bar and the star wrap, and then lifting the rebar support bar, replacing the work column with a tall separate product, the support bar is raised to an adjustment height that facilitates assembly work. The lower main bar is inserted into the frame of the star lap, and the lower main bar and the star lap are bound.

[0003]

However, in such a method of assembling a beam reinforcing bar, two people who lift one bar at a time and two people who replace one pair of working columns are used. A large number of workers with one set must meet and perform height adjustment work at once, which is very complicated, requires a great deal of labor and time, and involves danger.

[0004] In this regard, for the work of assembling hills on the upper beams,
There are provided a gate-shaped stand for raising and lowering the reinforcing bar by a pin replacement operation, and a jack-type stand for raising and lowering the support bar by operating a manual handle, and each of these stands is also provided. However, it is still necessary for the workers to stand up and down at the same time, and the work efficiency is still poor, which is still inconvenient.

[0005]

SUMMARY OF THE INVENTION The present invention is intended to solve such a problem, and as a method of assembling a beam reinforcing bar, firstly, a lifting drive source and a reinforcing bar support bar operated by the same. The work props equipped with the lifting hooks for the work are set as several sets, one set of which the lifting hooks face each other.
At the work site, the left and right sides are set up side by side, and the reinforcing bar is removably engaged between the left and right sides facing the lifting hook, and each is locked in a horizontal horizontal state, so that the lifting hook is driven up and down first. While the bar is lowered to a certain height by the source, the required number of star wraps are laid on the reinforcing bar support bar, and the required number of upper main bars passed through the frame of the star wrap is determined by the reinforcing bar support. The lifting hook is raised simultaneously by the lifting drive source to keep the star wrap suspended from the upper main bar, and the upper main bar is bound to the star wrap. On the other hand, it is characterized in that the lower main reinforcing bar and the star wrap inserted into the frame of the star wrap are bound, and finally the reinforcing bar support bar is removed from the lifting hook,

Secondly, a work column equipped with a lifting drive source and a lifting hook operated by the lifting rod for locking a reinforcing bar is used as a set of several pairs of the lifting hooks facing each other. With the left and right side-by-side installed, the reinforcing bar is removably engaged between the left and right sides facing the lifting hook, and each is locked in a horizontal horizontal state, and the lifting hook is first driven by a lifting drive source. While the bar is lowered to a certain height, the required number of star wraps are laid on the reinforcing bar support bar, and the required number of upper main bars passed through the frame of the star wrap is placed on the reinforcing bar support bar. Then, the lifting hook is raised at once by the lifting drive source, the star wrap is kept suspended from the upper main bar, and the upper main bar is held. Under the condition that the lifting hook is further raised to a certain height by the lifting drive source, the lower main reinforcement and the star wrap that are inserted into the frame of the star wrap are bound, and finally, the star wrap is bound. The reinforcing bar is detached from the lifting hook.

[0007] Further, as a working column used in the assembling method, a hollow column main body integrally formed in a rectangular shape in plan view with an opening window for a lifting hook extending vertically, and a lower end portion of the column main body are integrally formed. And a chain driven sprocket and a chain drive sprocket rotatably supported on the upper end and lower end of the support body, respectively, and the vertical movement of the chain driven sprocket and the chain drive sprocket. As a positional relationship between them, a pair of opposed roller rolling elevating guide rails also arranged in the column body, and a lift chain wound between the upper and lower portions of the chain driven sprocket and the chain driving sprocket, In order to drive the lift chain to rotate, the transmission connection state with the chain drive sprocket to the lower end of the column body A forward / reverse rotation motor attached to the lift chain, a lifting hook fastened and integrated in the middle of the lift chain, and at least one pair rotatably supported by the lifting hook as a relation state derived from the lead window of the support body. The rebar support bar is detachably engaged with the tip hook piece led out from the lead-out window of the lifting hook from above.

[0008]

According to the method for assembling a beam rebar according to the first invention, as a worker, a required number of star wraps are mounted on a horizontal rebar supporting bar which hangs a lifting hook stopped at a lowered position at a constant height. After the required number of upper main bars passed through the frame of the star wrap is locked on the reinforcing bar support bar, the rebar supporting bars are simultaneously raised, and the star wrap is lifted. By keeping the suspension in the air, the work of binding the star wrap and the upper main reinforcement, the work of inserting the lower main reinforcement into the star wrap, and the work of binding can be performed extremely efficiently in a comfortable posture.

Further, according to the above-mentioned assembling method of the second invention, after the upper main reinforcing bar and the stapler are tied together, the lower main bar is inserted into the lower main bar while the star wrap is further raised to a certain height. The work and the bundling work between the lower main bar and the star wrap can be performed lighter and more efficiently, which is extremely useful for on-site workability and labor saving.

Further, according to the construction of the assembling work column according to the third invention, the column itself is equipped with a lifting hook for locking the reinforcing bar support bar, a forward / reverse rotation motor for driving the lifting and lowering, and the like. The installation position at the work site and the supporting height of the reinforcing bar by the lifting hook can be freely adjusted, and the reinforcing bar can be removed from the lifting hook, so that the size and length of the beam reinforcing bar can be adjusted. It can be used without any restriction against the change, and it is excellent in versatility, in combination with the fact that the number of installations can be increased or decreased.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the drawings. FIGS. 1 to 7 show a working column (A) used in a method of assembling a beam reinforcing bar, which has a constant height of, for example, about 1950 mm. It has a square shape (approximately 150 × 150 m) from a pair of channel steels facing each other.
m) a hollow support body (11) integrated into the framework
Angle stay (1) to the lower end of the support body (11)
2) and a stable grounding board (14) fixed in a horizontal overhang state via bolts (13) and the like.

However, even though the column main body (11) is frame-integrated in the above-mentioned rectangular hollow, the space between the opposed channel grooved steels is a window for raising and lowering the hook having a constant band width along the vertical direction. 15), from which a lifting hook, which will be described later, is led out to the front portion of the column body (11). In the illustrated embodiment, the outlet window (15) is also formed in the back of the column body (11). However, the back may be kept closed by a back plate or the like.

(16) is a pair of front and rear connecting plates fixed at the upper end of the column main body (11) between opposed channel steel channels, and (17) is also the upper surface of the column main body (11). The work support (A) itself has a hanging bracket (1).
8) is planted. (19) is the support body (1)
1) At a halfway height position, a handle integrally projecting from the back surface thereof, (20) is a pair of shafts supported on the back surface of the stable grounding board (14) corresponding to the handle (19). Rubber wheel or brake-equipped free wheel, which, together with the handle (19), is subjected to artificial pulling movement of the working column (A).

Further, (21) is a pair of opposed bearings (pillow blocks) fitted and fixed to the upper end of the column body (11) so as to be accommodated in the above-mentioned channel grooved steel. The rotation support shaft (23) of the sprocket (22) is supported in a horizontal and horizontal state.

(24) is a pair of opposed bearings (pillow blocks) fitted and fixed to the lower end of the column main body (11) in a state to be accommodated in the channel grooved steel, whereby the chain drive sprocket (2) is provided.
The rotation support shaft (26) of 5) is also supported in a horizontal and horizontal state.

In this case, the chain drive sprocket (2)
The rotating shaft (26) of (5) extends through one of the bearings (24) horizontally and extends to the outside of the column body (11), and has a transmission sprocket (27) at its extension end. Are fixed so that they can rotate together.

(28) shows the positional relationship between the chain driven sprocket (22) and the chain drive sprocket (25) between the upper and lower sides, and is fixed upright inside the two channel groove steels forming the column body (11). A pair of parallel elevating guides, which are made of a square pipe material or the like, and define a groove type guide rail (29) of a roller to be described later between the opposing ones. It is a matter of course that a convex guide rail (29) instead of the groove type may be integrally and protruded inward from the column body (11) and the lifting guide (28) themselves.

An elevation drive source (30) is attached to the lower end of the support body (11) from the back thereof via bolts (31) and the like. An endless transmission chain (33) is wound between the output sprocket (32) and the transmission sprocket (27). Reference numeral (34) denotes an openable and closable cover case for covering the transmission chain (33) and the elevating drive source (30), which is attached to the work support (A).

Further, (35) is a lift chain wound between the upper and lower parts of the chain driven sprocket (22) and the chain drive sprocket (25), and a pair of upper and lower tension adjusters ( 36)
The lifting hook (B) for locking the reinforcing bar is fastened through the support.

That is, the lift chain (35) is driven to rotate by the power from the drive source (30),
The lifting hook (B) interposed in the middle of the lift chain (35) is raised and lowered.

As shown in FIG. 4, the lifting hook (B) is a rigid lifting and lowering frame integrated into a square having a size to be led out through the lifting hook lead-out window (15) of the column body (11). It is composed of a base frame (37) and a tip hook piece (39) attached and fixed to the exposed front part thereof via bolts (38) and the like. The end of (40) is engaged so as to be freely detachable.

However, as long as the lifting hook (B) can be led out from the lead-out window (15) of the column body (11),
Even if the lifting base frame (37) and the tip hook piece (39) are formed continuously and integrally, it may be acceptable. The rebar supporting bar (40) is preferably made of an angle type steel having a certain length as shown in FIGS. 8 and 9 and bears a rebar receiving notch (4).
The pluralities of 1) are provided in a distribution state in which a predetermined interval pitch (P) is maintained in advance.

On the other hand, a pair of upper and lower rollers (42) are mounted on a horizontal support shaft (43) on the back of the lifting hook (B), which is immersed in the support body (11), of the lifting base frame (37). ), The roller (42) rolls freely on a guide rail (29) defined by the column body (11), and smoothly moves the lifting hook (B). It can be raised and lowered correctly. In this regard, in the illustrated embodiment, a total of four rollers (42) made of a synthetic resin such as nylon are pivotally supported, but it is sufficient if at least two pairs are installed.

Reference numeral (44) denotes a unit control panel attached to and integrated with the back of the column main body (11) at an intermediate height position. The unit control panel includes a lifting hook (B) as shown in FIG.
Relays (45) (46) and electromagnetic switches (47) (48) for raising and lowering, limit switches (49) (50) for detecting upper and lower limits, snap switches (51), display lamps (52), etc. And a lifting control circuit having the same.

The limit switches (49) and (50) for detecting the upper and lower limits of the lifting hook (B) are attached to the upper end and the lower end of the column body (11), respectively, as is apparent from FIGS. So that it can come into contact with the lifting base frame (37) of the lifting hook (B). The display lamp (52) is turned on by the manual ON operation of the snap switch (51) to indicate that the lifting hook (B) is in an operable state.

The working column (A) is a pair facing each other, and several pairs thereof (A1-L) (A2-L) (A3
-L) (A1-R) (A2-R) (A3-R) (3 sets in total in the figure) are used in a left-right parallel state.
As bridging the ascending and descending hooks (B) facing each other,
The reinforcing bar (40) is locked in a horizontal state.

In addition, several sets (A1) of the working columns (A) are used.
-L) (A2-L) (A3-L) (A1-R) (A2-
R) and (A3-R), as suggested from the overall layout of FIG. 12, several sets (A1-L) and (A2-L) forming the left column.
L) (A3-L) The unit control boards (44) are electrically connected to each other by a cable (53) of an appropriate length, while the right-row sets (A1-R) (A2- R) (A
The 3-R) unit control panels (44) are also electrically connected to each other by a cable (54) having an appropriate length, and the pairs (A1-L) and (A2-L) in both the left and right rows are also connected. )
All of (A3-L), (A1-R), (A2-R) and (A3-R) are electrically connected to the main control panel (57) via the metal outlets (55) and (56). There are.

The main control circuit incorporated in the main control panel (57), as apparent from FIGS. 10 and 11, is a push-button switch (58) for raising and lowering the hook (B) by remote control. ) (59), and when the lifting push button switch (58) is turned on, the lifting hooks (B) mounted on the working column (A) are set to several sets (A1-L). ) (A2-L) (A3-L) (A1-
R) (A2-R) (A3-R) rise simultaneously.

On the other hand, if the lowering push button switch (59) is turned on, the lifting hook (B) is set to several sets (A1-L), (A2-L), and (A3-L) of the working columns (A).
As for (A1-R), (A2-R) and (A3-R), they are simultaneously lowered at once, and such a raising / lowering operation can be centrally and remotely controlled by the main control panel (57). is there.

In any case, if the operating hand is released, several sets (A1-L), (A2-L), and (A3-L) of the work columns (A) are released.
L) (A1-R) (A2-R) (A3-R)
It stops as the state where the lifting hooks (B) are all at the same height. If there is a work column (A) whose snap switch (51) has been turned off, only the lifting hook (B) of the column (A) does not move up and down, and a display lamp (52) indicating that the operation is disabled. Can be known by turning off the light.

FIG. 13 shows an operation circuit of the motor according to the elevation drive source (30), and FIG. 14 shows a power supply circuit. The power supply circuit includes an earth leakage breaker (60) and a no-use breaker (61). In addition, since the positive phase detection relay (62) is particularly incorporated, the lifting hook (B) does not operate in the event that the phase of the power supply is reversed, and there is a danger associated with the malfunction of rising and falling. Can also be prevented.

When the erection work of the beam rebar is performed by using the working column (A) configured as described above, several sets (A1-L) (A2-L) of the working column (A) are used. (A3-
L) (A1-R), (A2-R), and (A3-R) are set on the ground of the work site as a pair of lifting hooks (B) facing each other as shown in FIG. After standing up, the reinforcing bar support bar (40) is locked in a horizontal horizontal state over the facing lifting hook (B).

In this case, since the working columns (A) are independent of each other, several sets (A1-L) (A2-L)
(A3-L) (A1-R) (A2-R) (A3-R) adjacent front-to-back mutual spacing (L) and facing left-to-right mutual spacing (W) are determined according to the size of the target beam reinforcing bar. In addition to freely setting, the reinforcing bar support bar (40) having a length corresponding to this is selected and used.

Then, first, the lifting hook (B) of the working column (A) is divided into several sets (A1-L), (A2-L) and (A3).
-L) All of (A1-R), (A2-R), and (A3-R) are stopped at a fixed lowering position, and a required number of star wraps (a) are attached to the respective reinforcing bar support bars (40). As shown in FIGS. 16 and 17.

That is, at the beginning of the operation, the reinforcing bar support bar (4
All of the steps (0) are adjusted to a fixed height at which the star lap (a) can be rested, which means that the lower push switch (59) on the main control panel (57) is turned on and off. , Several sets (A1-L) (A2-L) of the working columns (A) by the off operation at the adjusted height.
(A3-L), (A1-R), (A2-R) and (A3-R) can be achieved simultaneously.

Next, a required number of upper main rebars (b) are passed through the frame of the star wrap (a), and the upper main rebars (b) are locked in a state of being placed on the rebar supporting bar (40). . At this time, if the angle type steel provided with the reinforcing bar receiving notch (41) is used as the reinforcing bar support bar (40), the upper main reinforcing bar (b) is received and locked in the notch (41) with the upper main reinforcing bar (b) received. b) has the advantage that the reinforcing bars can be easily and correctly positioned, but the notch (4) is used as the reinforcing bar support bar (40).
There is no problem even if a steel bar with a joint is used instead of 1).

After that, the ascending push button switch (58) of the main control panel (57) is turned on, and several sets (A1-L), (A2-L), and (A3-L) of the working columns (A) are turned on.
The lifting hook (B) in (A1-R), (A2-R), and (A3-R) is completely raised as shown in FIGS. 18 and 19, and the upper main bar (b) having the star wrap (a) inserted therethrough is lifted. ), The star wrap (a) is equally widened between the adjacent front and rear mutual intervals (S), and then the star wrap (a) and the upper main bar (b) are bound.

Then, the required number of lower main reinforcing bars (c) are continuously passed through the frame of the above-mentioned star wrap (a), and the lower main reinforcing bars (c) are also tied to the star wrap (a). Is completed, at least two of the reinforcing bar support bars (40) are left, and the rest is removed from the lifting hook (B) of the work column (A), and the completed beam reinforcing bar remains. It may be lifted and moved by a crane or the like together with the reinforcing bar support bar (40), and may be collectively placed at a certain location on the work site.

The above star wrap (a) and upper main bar (b)
20 and 21, the lifting hook (B) of the working column (A) is simultaneously raised to a certain height, as shown in FIGS. 20 and 21, and is lowered into the frame of the raised star wrap (a). The star main body (c) can be passed through and the star wrap (a) and the lower main main body (c) can be bound together.
According to this, there is an advantage that the lower main bar (c) can be inserted and tied in a more comfortable standing posture.

As is clear from FIGS. 15 and 21, a stop stand (63) for receiving the upper main bar (b) and the lower main bar (c) is also used, and the stand (63) is used as the work column (A). (A1-L) (A2-L) (A3-
L) If the partition is laid on the front end or the rear end in (A1-R), (A2-R), or (A3-R), the leading end portion of the main reinforcing bar at the time of passing the stirrup (a) into the partitioning state. It can be automatically aligned, which is extremely convenient.

In any case, when assembling the beam rebar for the next time, the work support (A) is kept in the upright state, and the lifting hook (B) is lowered to the predetermined height at the beginning of the work. The work can be repeated in the same manner. In the illustrated embodiment, the work of assembling the beam reinforcement has been described. However, the present invention can also be applied to the work of assembling hills of upper beams, and the number of working columns (A) used depends on the purpose. It can be freely increased or decreased according to the length of the beam rebar, etc.
Needless to say.

Further, in the illustrated embodiment, the lifting hook (B)
Is mounted on the work column (A) as a motor, but a hydraulic or pneumatic cylinder in place of the motor is mounted on the work column (A), and the work column (A) is connected to the work column (A). It is determined that the chain driven sprocket (22) is moved up and down by a piston rod which stands in parallel. It is also conceivable to fasten the lifting hook (B) with the cylinder by fastening the other end of the separation to the working column (A) of the fixing member.

[0043]

As described above, in the method of assembling a beam rebar according to the present invention, the work provided with the lifting drive source (30) and the lifting hook (B) operated by the lifting source for locking the reinforcing bar support bar. The support (A) is divided into several sets (A1-L) (A2-L) (A3-
L) (A1-R), (A2-R), (A3-R) are installed on the work site in a left-right parallel state, and a reinforcing bar support bar (4) is inserted between the left and right sides facing the lifting hook (B).
0) are engaged with each other so as to be freely disengageable and horizontally suspended, and the lifting hook (B) is first lowered to a certain height by the lifting driving source (30). A required number of star wraps (a) are leaned against the reinforcing bar support bar (40), and the required number of upper main reinforcing bars (b) passed through the frame of the star wrap (a) is reduced by the reinforcing bar supporting bar (40). ) The upper hook (B) is locked in the mounted state, and the lifting hook (B) is simultaneously raised by the lifting drive source (30) at a time to keep the star wrap (a) suspended from the upper main bar (b). In addition, while binding the upper main bar (b) and the star wrap (a), the lower main bar (c) and the star wrap (a) passed through the frame of the star wrap (a) are tied, and finally, The above reinforcing bar support bar (40)
Is removed from the lifting hook (B), eliminating the need for manual labor such as lifting the rebar support bars all at once or replacing the work posts all at once, unlike the prior art. Has the effect of assembling a large number of beam rebars, and is excellent in safety.

According to the assembling method of the second aspect, in the state of being suspended from the upper main reinforcement (b), after binding the upper main reinforcement (b) and the star wrap (a), the lifting hook (B) is continued. Under the condition that the height is further raised, the work of passing the lower main bar (c) through the star wrap (a) and the work of binding the both can be performed more easily and efficiently, and the working time can be improved. And help greatly reduce labor.

In particular, if the assembling method according to the third aspect is adopted, the tip portions of the upper main bar (b) and the lower main bar (c) are received by themselves together with the stop of the stopper stand (63). The stapling (a) can be performed more lightly and correctly.

Furthermore, if the working column (A) used in the assembling method adopts the structure described in claim 4, the lifting chain (35) of the lifting hook (B) is installed in the hollow interior of the column body (11). Also, while the lifting guide rail (29) of the lifting hook (B) is incorporated, a forward / reverse rotation motor (30) for driving the lifting hook (B) is also attached and installed, and the lifting hook (B) is installed. B) with respect to the tip hook piece (39) led out from the lead-out window (15) of the support body (11) with respect to the reinforcing bar support bar (4).
Since the work support (A) is designed to be freely used at the work site, the work support (A) has a layout suitable for the size and length of the desired beam rebar. By using the lifting hook (B) to adjust the supporting height of the reinforcing bar, which is easy to work, the assembling work of the beam rebar can be performed extremely easily and efficiently. Remarkably excellent.

[Brief description of the drawings]

FIG. 1 is a front view showing a working column for assembling a beam reinforcing bar according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a side view of the lifting hook corresponding to FIG.

FIG. 4 is an exploded perspective view showing the column main body.

FIG. 5 is an enlarged cross-sectional view of a partially cutaway along line 5-5 in FIG. 2;

FIG. 6 is an enlarged sectional view taken along line 6-6 in FIG. 2;

FIG. 7 is an enlarged sectional view taken along line 7-7 of FIG. 2;

FIG. 8 is a perspective view showing extracted reinforcing bar support bars.

FIG. 9 is a perspective view illustrating a state in which the reinforcing bar is locked to the lifting hook.

FIG. 10 is an elevation control circuit diagram.

FIG. 11 is a partial detailed view of FIG. 10;

FIG. 12 is an overall electrical wiring diagram of several sets of working columns and a main control panel.

FIG. 13 is an operation circuit diagram of a motor (elevation drive source).

FIG. 14 is a power supply circuit diagram.

FIG. 15 is a perspective view showing a state in which the work columns are set up in parallel.

FIG. 16 is a front view showing a state in which the star wrap rests on the reinforcing bar support bar and a state in which the upper main bar is inserted.

FIG. 17 is a sectional view taken along line 17-17 of FIG. 16;

FIG. 18 is a front view showing a state in which the star wrap is lifted, and a state in which the upper main bar and the lower main bar are inserted.

FIG. 19 is a sectional view taken along line 19-19 of FIG. 18;

FIG. 20 is a front view showing steps from a state where the star wrap rests to a state where the lower main bar is inserted.

FIG. 21 is a sectional view taken along line 21-21 of FIG. 20;

[Explanation of symbols]

 (11) ・ Main body (15) ・ Outlet window (22) ・ Chain driven sprocket (25) ・ Chain driving sprocket (29) ・ Elevation guide rail (30) ・ Elevation drive source (forward / reverse rotation motor) (35) ・Lift chain (40), Rebar support bar (42), Roller (63), Stopper stand (A), Work column (A1-L), Work column (A2-L), Work column (A3-L), Work column (A1-R), work support (A2-R), work support (A3-R), work support (B), lifting hook (a), star wrap (b), upper main bar (c), lower main bar

Claims (4)

(57) [Claims] A work column (A) equipped with a lifting drive source (30) and a lifting hook (B) for locking a reinforcing bar supported by the lifting drive source (30), wherein the lifting hooks (B) face each other. Several sets (A1-L) (A2-L) (A3-
L) (A1-R), (A2-R), (A3-R), as well as being installed on the work site in a left-right parallel state, and a reinforcing bar support bar (40) between the left and right sides facing the lifting hook (B). The lifting and lowering hook (B) is firstly lowered to a certain height by the lifting and lowering drive source (30), and the rebars are locked. A required number of star wraps (a) are laid on the support bar (40), and the required number of upper main reinforcing bars (b) passed through the frame of the star wrap (a) is placed on the reinforcing bar supporting bar (40). Then, the lifting hook (B) is raised at once by the lifting drive source (30), and the star wrap (a) is kept suspended from the upper main bar (b). , Its upper main bar (b) and star wrap ( ), While binding the lower main bar (c) and the star wrap (a) passed through the frame of the star wrap (a). Finally, the reinforcing bar support bar (40) is raised and lowered by the hook (B). )
A method of assembling beam rebars, characterized by being removed from 2. A work column (A) equipped with a lifting drive source (30) and a lifting hook (B) for locking a reinforcing bar supported by the lifting drive source (30), wherein the lifting hooks (B) face each other. Several sets (A1-L) (A2-L) (A3-
L) (A1-R), (A2-R), (A3-R), as well as being installed on the work site in a left-right parallel state, and a reinforcing bar support bar (40) between the left and right sides facing the lifting hook (B). The lifting and lowering hook (B) is firstly lowered to a certain height by the lifting and lowering drive source (30), and the rebars are locked. A required number of star wraps (a) are laid on the support bar (40), and the required number of upper main reinforcing bars (b) passed through the frame of the star wrap (a) is placed on the reinforcing bar supporting bar (40). Then, the lifting hook (B) is raised at once by the lifting drive source (30), and the star wrap (a) is kept suspended from the upper main bar (b). , Its upper main bar (b) and star wrap ( ), And the lower main reinforcing bar (B) is passed through the frame of the star wrap (a) in a state where the lifting hook (B) is further raised to a certain height by the lifting drive source (30). (C) and the star wrap (a) are bound, and finally, the reinforcing bar support bar (40) is raised and lowered by the hook (B).
A method of assembling beam rebars, characterized by being removed from 3. Several sets (A1-L), (A2-L), and (A3-L) of the work columns (A) set up in a left-right parallel state.
The (A1-R), (A2-R) and (A3-R) can be set up in the frame of the star wrap (a) by laying the stopper stand (63) in a crossing state at the front end or the rear end thereof. The front end portions of the upper main bar (b) and the lower main bar (c) which have been inserted are received and aligned.
The method of assembling the beam reinforcement described. 4. A lead-out window (1) for lifting hooks along the vertical direction.
5) a hollow pillar body (11) that is frame-integrated into a rectangular shape in plan view with an opening, a stable grounding board (14) that integrally projects from the lower end of the pillar body (11), and the pillar body A chain driven sprocket (22) and a chain drive sprocket (25) rotatably supported on the upper and lower ends in (11), respectively, and the chain driven sprocket (22) and the chain drive sprocket (25). As a positional relationship facing the upper and lower sides of the column, a pair of facing roller elevating guide rails (29) also arranged in the column body (11), the chain driven sprocket (22), and the chain driving sprocket (25). ), And a lower end of a support body (11) for driving the lift chain (35) to rotate. The delay drive sprocket (2
5) The forward / reverse rotation motor (30) attached to the transmission connection state with the power transmission connection state, and the connection state derived from the exit window (15) of the support body (11) is fastened and integrated in the middle of the lift chain (35). The lifting hook (B), and at least a pair of rollers (42) rotatably supported by the lifting hook (B), and is led out from the outlet window (15) of the lifting hook (B). Reinforcing bar support bar (40) to tip hook piece (39) from above
A work column for assembling a beam rebar, characterized in that it is used so that it can be detachably engaged.