JPH07216875A - Jig for suspending reinforcement - Google Patents

Abstract

PURPOSE:To separate a crane and reinforcement which has been set upright by crane operation, with the use of an on-ground work. CONSTITUTION:Each of three sheathing pipes 22 is formed therein with a main reinforcement insertion space 22s through which main reinforcement 37a that is steel reinforcement is inserted so as to be movable in its axial direction. A main reinforcement suspender 21 for suspending a clamp 27 adapted to grip the main reinforcement 37a, composed of a coupling member 23, a towing wire 25 and a bundling jig 26 which serve as suspending and engaging means, is attached to a hook block 41 of a crane vehicle 40. In a condition such that the main reinforcement 37a is inserted in the main reinforcement insertion space 22s, and is gripped by the clamp 27, the crane is operated to set the main reinforcement 37a upright. In this condition, when the clamp 27 is released to lift up the hook block 41, the sheathing pipe 22 comes off from the main reinforcement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar suspension jig suitable for suspending reinforcing reinforcing bars for constructing deep foundation piles by using cast-in-place concrete.

[0002]

2. Description of the Related Art Conventionally, when hoisting a reinforcing bar with a crane, a plurality of the reinforcing bars are bundled and left to lie sideways and suspended on a crane, which is then lifted on a scaffolding or the like. Was. However, when constructing deep foundation piles using cast-in-place concrete, since a fairly long reinforcing bar is used as the main bar, it is not possible to carry out such a lifting method and place the reinforcing bar horizontally on the scaffold. Absent. Therefore, a method has been proposed in which one end of a reinforcing bar laid on the ground is hung on a crane so as to be grasped and the reinforcing bar is erected in a state corresponding to an actual reinforcing bar arrangement by a crane operation.

[0003]

[Problems to be Solved] However, in this method, when the reinforcing bar is erected on the ground, one end side of the reinforcing bar suspended by the crane is arranged far above the other end side. Then, when attempting to disconnect from the crane in order to transfer the vertically reinforced reinforcing bar to a scaffolding or a reinforcing bar erection device, etc., the part that the worker went to the upper end side due to work at height The work of releasing the gripping part of the crane must be done manually. Therefore, it is complicated and dangerous. Needless to say, there has been proposed a reinforcing bar gripping device capable of gripping and releasing the reinforcing bar by remote operation, but such a reinforcing bar gripping device has a complicated structure, which causes difficulty in economy. Therefore, in view of the above circumstances, the present invention makes the reinforcing bar stand on the ground,
(EN) A jig for suspending a reinforcing bar, which can be separated from a crane without working at high places and has a simple device configuration.

[0004]

That is, the present invention provides a sheath tube (2
2), and the rebar insertion space (22
s) is formed so that the reinforcing bar (37a) can be inserted movably along the material axis direction of the reinforcing bar (37a), and the reinforcing bar (37a) can be gripped in the sheath pipe (22). (27) is suspended, and the suspension pipe (22) is provided with suspending engagement means (23, 25, 26). Further, according to the present invention, the suspension pipe (22) and the rebar clamp (27) are attached to the suspension engaging means (23, 25, 26), and the sheath pipe (22) and the rebar clamp (27) are connected to each other. A plurality of them are provided in a form corresponding to the pair 1, and configured. The numbers in parentheses () indicate the corresponding elements in the drawings for convenience, and therefore the present description is not limited to the description in the drawings. The same applies to the following action columns.

[0005]

With the above-described structure, the present invention makes the reinforcing bar (37a) inserted in the reinforcing bar insertion space (22s) held by the reinforcing bar clamp (27), and suspends the reinforcing bar (37a). It acts to suspend and support the means (23, 25, 26). Further, the present invention provides a suspension engaging means (23,
25, 26) act to collectively suspend and support a plurality of reinforcing bars (37a).

[0006]

EXAMPLE FIG. 1 is a partially cutaway perspective view showing a state of a pile construction site where a reinforcing bar erection work is being performed by a reinforcing bar erection device using an example of a reinforcing bar suspension jig according to the present invention.
2 is an enlarged view showing the vicinity of the wellhead of the pile construction site shown in FIG.
3 is a plan view showing a portion of the gauge disc of the reinforcing bar building device shown in FIG. 1, and FIG. 4 is a plan view of the gauge disc shown in FIG.
FIG. 5 is an enlarged view of an arrow IV portion, FIG. 5 is a plan view showing a slide guide portion of the reinforcing bar building device shown in FIG. 1, and FIG. 6 is a disconnection of a portion VI of the lower frame frame of the reinforcing bar building device shown in FIG. FIG. 7 is a side view, FIG. 7 is a view showing a state where main bars are attached to the reinforcing bar building device shown in FIG. 1 by using a reinforcing bar suspension jig, and FIGS. 8A to 8C are pile construction shown in FIG. It is a figure which shows a mode that the distribution muscle is welded to the main muscle in the field.

As shown in FIG. 1, a vertical hole 3 for later becoming a pile 30 is provided on the ground 2a at the site 1 where piles are being constructed.
A mortar 36 for temporary support is formed on the side wall 3c of the vertical hole 3 in a shape of a cylinder having a predetermined diameter D1 in the form of a pit 3
It is sprayed and cast in an annular shape so as to connect a and the hole bottom 3b. Also, at the site 1, there is a reinforcing bar building device 5,
It is provided for the pile 30 described above, that is, for the purpose of building the reinforcing bars for concrete reinforcement (that is, the main reinforcing bars 37a and the distributing bars 37b) into the vertical holes 3 as the reinforcing bar cage 37 which is the reinforcing bar assembly. Is formed so that its overall external shape is cylindrical. The rebar cage 37 has a plurality of main bars 37a arranged along the side wall 3c of the vertical hole 3 in the form of extending in the vertical direction, that is, the plurality of main bars 37a.
It is composed of a plurality of distribution muscles 37b welded and connected to the plurality of main reinforcements 37a so as to extend laterally in a manner intersecting with a. While being connected to the main reinforcement 37a and the distribution muscle 37b, it is being built in the vertical hole 3. In addition, as shown in the right part of FIG. 2, the force distribution muscles 37b are formed in such a shape that their respective carry-in shapes to the site 1 are semicircular,
A pair of the semicircular distribution muscles 37b is paired and circularly lap-welded to form one distribution muscle 37b.

As shown in FIG. 1, the reinforcing bar building device 5 has a frame 6, which is erected and supported on the ground 2a by the legs 61a of the four columns 61 of the frame 6. There is. At the upper end of the frame 6, a gauge disk 61 formed in a hollow disk shape is connected to the four columns 61 via four beams 62, and is attached to the middle portion of the four columns. As shown in FIG. 3, the gauge disc 61 is provided with a plurality of main reinforcement placement portions 71 formed along the outer periphery of the gauge disc 7 at predetermined pitches P1. There is. The plurality of main bar placement portions 71 formed on the gauge disk 7 are used for the main bar 3 to be built.
It is formed in a shape corresponding to the bar arrangement pitch of 7a, and in the embodiment, the formation pitch of the main bar arrangement portion 71 is formed to about 5 cm, so that the bar arrangement pitch of the main bar 37a is 10, 15, 20 cm. It is possible to select from an integer multiple of 5, such as.

As shown in FIG. 4, each main reinforcement arranging portion 71 of the gauge disc 7 is capable of accommodating one main reinforcement 37a having a diameter corresponding to the diameter of the main reinforcement of the pile 30. The main bar placement portion 71 is configured to be capable of holding the main bar 37a movably in the up-down direction which is a direction intersecting the plane of FIG. Further, the gauge disk 7 is provided with stoppers 72, such as leaf springs, as main bar fixing tools in the respective main bar disposition parts 71 by the number of the main bar disposition parts 71 formed. Is fixed to the gauge disk 7. As shown by the alternate long and short dash line in FIG. 4, each stopper 72 can freely bend only toward the inner side, that is, toward the main bar disposition portion 71 side. The main bar 37a can be inserted horizontally into each of the plurality of main bar arrangement portions 71 (that is, the main bar 37a can be inserted in the direction of arrow A in FIG. 4).

As shown in FIG. 1, a slide guide 8 formed in an annular shape is connected to and supported by the four columns 61 via four beams 63 at the lower portion of the frame 6. As shown in FIG. 2, the slide guide 8 is provided on the wellhead 3a slightly above the ground 2a, that is, at a height position near the foot of the worker 39. It is designed to be placed in. Also,
The slide guides 8 are vertically arranged side by side with the gauge disc 7 so as to be arranged at a position aligned with the gauge disc 7 between the gauge disc 7 and a lower frame frame 9 described later. As shown in FIG. 5, in the middle part of the
It is formed in a circular shape with a diameter D2 slightly larger than the outer diameter of the rebar cage 37. That is, the reinforcing bar insertion space 8s of the slide guide 8 allows the assembled reinforcing bar cage 37 to pass in the vertical direction shown in the direction intersecting the plane of FIG.

As shown in FIG. 1 or 2, on the upper portion of the frame 6, three electric chain blocks 10 are suspended from the bottom surface of the gauge disk 7 in this embodiment. The lower frame frame 9 which is a main bar holding means of the reinforcing bar erection device 5 is provided below the three chain blocks 10 (that is, below the gauge disc 7). It is hung from the three chain blocks 10 by one wire 11 and is provided in such a manner that it can move up and down in the vertical hole 3. That is, the chain block 10 includes the lower frame frame 9
Is provided on the frame 6 as an elevating device which can be driven to move up and down and positioned freely.
The lower frame frame 9 can only move downward from the upper side to the lower side by the operation.

The lower frame 9 is, as shown in FIG.
The mortar 36 is formed in an annular shape having a diameter slightly smaller than the inner diameter of the vertical hole 3 in a state of being sprayed, and a lower end portion of the lower frame 9 has a supporting portion 9a as shown in FIG.
Are provided so as to face the upper flange portion 9b formed on the upper end side of the lower frame frame 9. As described above, the main frames 37a arranged along the side wall 3c of the vertical hole 3 are mounted on the lower frame 9 on the support portion 9a through the insertion holes 9s formed in the upper flange portion 9b. Therefore, the rebar cage 37 including the plurality of distribution muscles 37b connected to the plurality of main muscles 37a has a lower frame 9
It is mounted and supported by. Further, as shown in FIG. 6, on the bottom surface side of the supporting portion 9a of the lower frame 9, a supporting surface 9a is circumferentially formed so as to be supported by the hole bottom 3b of the vertical hole 3.

Further, as shown in FIG. 1, several hook holders 12 are mounted on the lower frame 9, and each hook holder 12 is hook-engaged as shown in FIG. The protrusions 12a are provided so as to protrude downward inward in the radial direction of the lower frame frame 9.
The hook holder 12 has a hook arrangement groove 12b formed between a portion connected to the lower frame frame 9 and the hook engagement protrusion 12a. The hook holder 12 has a hook arrangement groove 12b below the hook arrangement groove 12b. The suspension ring 13 connected to the lower end of the wire 11 is engaged with and held by the hook engaging projection 12a from the side. Therefore, as described above, the rebar cage 37 supported by the lower frame frame 37.
Is hung and supported by the three chain blocks 10 via the wires 11 engaged and held by the hook holders 12, whereby the rebar cage 37 is mounted on the frame 6 to which the chain block 10 is mounted. The shape is supported by. A level adjustment jack 15 is provided between the wire 11 and the suspension ring 13 so as to adjust the length of the wire 11 in the directions of arrows B and C in FIG. The equilibrium state of the lower frame frame 9, that is, the equilibrium state of the reinforcing bar cage 37 mounted and supported on the lower frame frame 9 can be adjusted and held via the level adjustment jack 15.

Further, the frame 6 of the reinforcing bar building device 5
2 is provided with four hydraulic jacks 16 mounted on the gauge disc 7, as shown in FIG.
A distribution force receiving jig 17 which is a distribution force holding means is suspended from each hydraulic jack 16 via a chain 19. Each of the force distribution receiving jigs 17 is configured to be movable by a predetermined length in the vertical direction shown by arrows D and E in FIG. 2 via the hydraulic jacks 16. Reference numeral 17 indicates that the arrangement position of the hydraulic jack 16 on which the force distribution receiving jig 17 is suspended is slightly radiated from the position where the force distribution receiving jig 17 is to be arranged when the force distribution muscle 37b is arranged. The shape is closer to the inner side in the direction, and is movable from the inner side to the outer side of the position where the distribution muscle 37b is to be built. The force distribution receiving jig 17 has a structure shown in FIG.
As shown in (a) to (c), a plurality of hooks 191 which are a plurality of force distribution muscle holding portions are arranged at predetermined pitches in the vertical direction at a pitch corresponding to the muscle distribution pitch of the power distribution muscles 37b. A plurality of hooks 191 that are provided and are arranged in the up-down direction of each force distribution jig 17 are connected to each other via the guide 9, and by operating the guide 9, the hooks 191 can be moved in the directions indicated by arrows F and G in FIG. The shape is such that it can be projected and retracted by a predetermined stroke in the radial direction in and out. Then, the force distribution receiving jig 17
Is configured such that one force distributing muscle 37b can be mounted and held on each of the plurality of hanging devices 191.

By the way, as shown in FIG. 1, a crane vehicle 40 is arranged at the site 1 so as to be located near the vertical hole 40, and a hook block 41 of the crane vehicle 40 has a reinforcing bar hanging jig. The main bar suspension 21 is attached and hung. As shown in FIG. 7, the main bar suspension 21 has three sheath tubes 22 in the embodiment, and each sheath tube 2
Inside 2 is a main bar insertion space 22s which is a reinforcing bar insertion space.
However, the main bar 37a is formed so that the main bar 37a can be inserted along the axial direction of the main bar 37a (that is, vertically). The three sheath tubes 22 are connected via a connecting member 23 so as to be arranged in a horizontal direction at a pitch corresponding to the bar arrangement pitch of the main bars 37a. A pulling wire 25 attached to the connecting member 23,
It is suspended from the hook block 41 via a bundling jig 26. Therefore, the connecting member 23, the pulling wire 25, and the bundling jig 26 form a suspension engaging means provided on the three sheath pipes 22. The main bar suspension 21 is suspended and supported by the hook block 41.

Further, as shown in FIG. 7, a clamp 27, which is a reinforcing bar clamp capable of gripping the main bar 37a, is attached to the main bar suspension 21 under the three sheath pipes 22. The connecting member 23, the pulling wire 25, and the bundling jig 26 are provided in three pieces so as to form a pair, and each clamp 27 has a connecting wire 29 having a length L1. It is connected and connected to each of the sheath tubes 22 in a form of being suspended from the connecting member 23 via the. That is, in the main bar suspending device 21, each sheath pipe 22 and each clamp 27 is in a state of being suspended by the suspension engaging means on the hook block 41 of the crane vehicle 40.
Due to the weight of the clamp 27, the predetermined distance L1 can be maintained in the vertical direction. At this time, the three sheath pipes 22 are arranged so as to be interposed in the traction force of the crane. The sheath tube 22 and the three clamps 27 are arranged so as to line up in the vertical direction, whereby the main bar suspension 21 holds the main bar 37a with its material axis direction oriented in the vertical direction, as shown in FIG. Is ready to go.

Since the site 1 has the above-mentioned structure, when the pile 30 is constructed in the site 1, the vertical hole 3 is formed.
Is formed by digging from a predetermined position on the ground 2a by a predetermined depth so as to form a predetermined diameter D1, and the mortar 36 is sprayed on the side wall 3c to a predetermined thickness. A work of building a reinforcing bar cage 37 having a plurality of main bars 37a and a plurality of force distribution bars 37b into the vertical hole 3 as a reinforcing bar assembly is performed. Therefore, first, so as to surround the wellhead 3a of the vertical hole 3 in which the rebar cage 5 is to be built, namely,
As shown in FIG. 1, the lower frame 9 is installed in the vertical hole 3 in such a manner that the lower frame 9 can freely descend. On this occasion,
The reinforcing bar building-in device 5 is installed so that the center CL1 of the frame 6 coincides with the center CL1 of the vertical hole 3.

Therefore, firstly, a predetermined number of main bars 37 are arranged.
The work of vertically holding a on the lower frame frame 9 in a form corresponding to the respective bar arrangement positions is performed. Therefore, first, the main muscle insertion space 22 of each of the three sheath tubes 22 of the main muscle suspender 21 is inserted.
s, the main bar 37 in a state of being laid down as shown in the right back part of FIG.
A is inserted, and the clamp 27 is attached to a predetermined position of the main bar 37a (that is, a position which becomes a lower part when the main bar 37a is set vertically). In this way, 3 clamps 2
7, the three main bars 37a are gripped, the bundling jig 26 is engaged with the hook block 41 of the crane vehicle 40, and then the hook block 41 is moved upward by the crane operation. Then, the main bar suspension 21
The clamps 27 holding the main bars 37a are connected to the connecting members 23 provided on the three sheath tubes 23 and the pulling wire 2
7, the crane 4 as a bundling jig 26 as a suspension engagement means
It hangs at 0 and becomes vertical. In this way, the main line 37
When a is laid down vertically and raised vertically, the three main bars 37
a is raised in a form in which horizontal movement is restrained by the three sheath tubes 22 and is a vertical main bar 37a.
Is held in such a manner that its axial direction is oriented vertically by the restraining force of the three sheath tubes 22 in the horizontal direction and the own weight of the three main bars 37a, and the main bars are suspended via the three clamps 27. It becomes the form hung on the tool 21. As a result, the three main bars 37a, as shown in FIG.
The main rod suspending device 21 is stably provided without bending the shaft of 7a.
It is hung and held by the hook block 41 via.

In this state, the hook block 41 is further appropriately moved through the operation of the crane so that the three main bars 37
a is set between the gauge disk 7 and the lower frame frame 9. For this purpose, first, the lower end portions of the respective main reinforcements 37a are inserted into the lower frame frame 9 and the insertion holes 9s are inserted into the supporting portions 9a, and then the upper end portions of the main reinforcements 37a are fixed to the predetermined positions of the gauge disk 7. The main bar arranging portion 71 at the position is inserted and arranged. At this time, since a stopper 72 is provided in each main bar arrangement portion 71, the main bar 37 is pushed by the main bar 37a in the direction of arrow A in FIG.
a is inserted into the main bar arrangement portion 71 from the horizontal direction. Then, the stopper 72 immediately closes the main bar arrangement portion 71 in which the main bar 37a is inserted and arranged so as to be restored to the plate 73 side as shown by the solid line in FIG. 4 by the spring force of the stopper 72. That is, the main bar 37a is prevented from coming off from the main bar arrangement portion 71 to the outside in the radial direction. As a result, the main bar 37a is held in the main bar disposing portion 71 so as to be vertically movable with respect to the main bar disposing part 71. The gauge disk 7 has a predetermined pitch P1.
Since a plurality of main bar arrangement portions 71 are formed (at a pitch of 5 mm in the embodiment), only a necessary one of the plurality of main bar arrangement portions 71 can be selectively used. That is, the main bar arrangement portion 71 at a position where bar arrangement is unnecessary is not used and left.

In this manner, three main reinforcements 32a are sequentially mounted on the supporting portion 9a of the lower frame 9, and the main reinforcements 21 are lowered by the crane operation while arranging the main reinforcements on the support arrangement portion 71 of the gauge disk 7. , The three main bars 37a in which the suspension supporting state by the main bar suspension 21 has been released
Is held vertically by the lower frame frame 7 due to its own weight. Therefore, the three clamps 27 of the main bar suspension 21 are sequentially removed from the main bar 37a. Further, the hook block 41 is raised by operating the crane. Then, in the main muscle suspending device 21 with the clamp 27 removed from the main muscle 37a, the three sheath tubes 22 move upward relative to the main muscle 37a via the respective main muscle insertion spaces 22s. It comes off from the main bar 37a so as to come out to the upper side. Therefore, if the main bar suspension 21 is used, the main bar 37a can be easily made to be vertical only by attaching the clamp 27 to the laid main bar 37a and operating the crane. The main bar suspension 21 can be easily attached to the main bar 37a simply by removing the clamp 27 from the vertical main bar 37a.
It is possible to remove from the work, and these works do not involve work at heights and complexity of work.

By repeating the above-described operation of setting the main bars 37a between the gauge disk 7 and the lower frame 9, the main bars 37a having a predetermined number of bar arrangements are made to correspond to the respective bar arrangement positions. When vertically mounted on the lower frame 9, the level adjusting jack 15 is driven to adjust the length of each wire 11 to adjust the level of the lower frame 9. As a result, a predetermined number of main bars 37a mounted and held on the lower frame 9 are held.
Are balanced so that each of them has a shape in which the material axis direction is oriented in the vertical direction. Therefore, next, the predetermined number of main bars 3
Work for connecting the distribution muscle 37b to 7a is performed.

At the time of connection work of the distribution muscle 37b to the main reinforcement 37a, the distribution muscle receiving jig 18 is used.
The force distribution muscle 37b located at the bottom of the
When connecting to a, the lower end of the force distribution receiving jig 18 is set to the lower end of the main bar 37a. Then, when connecting the force distribution muscles 37b located above this to the main muscles 37a, as shown in FIG. 8 (a), the force distribution muscles 37b already connected to the main muscles 37a are located above the respective force distribution muscles 37b. The jig 18 is positioned and set. The positioning of the force distribution muscle receiving jig 18 is performed by setting the hanging tool 191 at the lowermost end to be engaged with and held by the force distribution muscles 37b already connected to the main muscles 37a. This is done by driving the jacks 16 respectively.

Each of the four force distribution bracing jigs 18 thus positioned is arranged inside a plurality of ring-shaped main braces 37a held by the lower frame 9. . Therefore, next, as shown in FIG. 8B, the force distribution bracing jig 18 is slightly moved outward in the radial direction, and a plurality of hooks 1 are provided via the guide 19.
The main bar 37 is formed by projecting 91 in the direction of arrow G in FIG.
The plurality of hooks 191 are arranged so as to project outside the a. At this time, of the plurality of hooks 191 of the force distribution receiving jig 18, the hook 191 located at the lowermost part is hooked on the force distribution muscle 37b which is already connected to the main bar 37a and located at the top. In this case, the force distribution muscle receiving jig 18 is accurately held on the inner side of the main muscle 37a. At this time, the hooks 191 are provided on the force distribution muscle receiving jig 18 in a form corresponding to the bar arrangement pitch of the force distribution muscles 37b, so that the positions where the force distribution muscles 37b should be arranged are plural. The position of the tool 191 is immediately detected.

Therefore, the four force distribution receiving jigs 18 are shown in FIG.
As shown in Fig. 2, when the respective hooks 191 are set so as to project to the outside of the main bar 37a, the force distribution bar 37b having a semicircular shape as shown in the right part of Fig. 2 is formed.
Then, as shown in FIG. 8 (b), the hooks are engaged and held on the hanging members 191 of the force distribution receiving jig 18 in a hooked manner. Then, each of the force distribution muscles 37b is wrapped around each end portion of the two semicircular force distribution muscles 37b, 37b so that each of the distribution muscles 37b has a circular shape. 37
Weld and connect them so that they intersect with a.
Then, by repeating the work of connecting the distribution muscles 37b to the plurality of main reinforcements 37a, the reinforcement bar 1 which is the reinforcement assembly.
0 can be formed, and the rebar assembly work for this is
As shown in FIG. 2, the work can be performed outside the ground on the ground 2a near the wellhead 3a.

In this way, the force distribution muscles 37 engaged with the hooks 191 of all the steps of the force distribution muscle receiving jig 18 set previously.
When b is welded to the main bar 37a and the work for connecting the force distribution muscles for one cycle is completed, as shown in FIG. 8 (c),
The force distribution receiving jig 18 is separated from the main reinforcement 37a (that is, the rebar cage 37 being assembled). To this end, the respective hydraulic jacks 16 are released and the respective force distribution receiving jigs 18 are moved slightly downward. Then, the force distribution receiving jig 18 immediately becomes suspended from the hydraulic jack 16 via the chain 20 and thereby returns to the inner side in the radial direction from the main reinforcement 37a. As shown in FIG. 8C, the jig 18 is restored and arranged inside the main bar 37a.

In this way, the distribution muscles 37b corresponding to the hooks 191 on all the steps of the distribution muscle receiving jig 18 become the main reinforcements 37.
When the work of connecting to a is performed, the work of assembling the reinforcing rod cage corresponding to the length of the force distribution receiving jig 18 has progressed. Therefore, while performing the work of assembling the reinforcing bar cage 37 using the distribution force receiving jig 18 as described above, each chain block 10 is driven in a predetermined cycle and each wire 1
The lower frame 9 is gradually lowered into the vertical hole 3 in such a manner that 1 is extended. Then, the lower frame frame 9
The predetermined number of main bars 37a set between the lower frame frame 9 and the main bar arrangement portion 71 of the gauge disc 7 while being mounted and held on the main bar 37a are as described above.
Together with the force distribution bar 37b connected to, the rebar basket 37 is lowered into the vertical hole 3 as an assembled part. Therefore, when the worker 39 drives and operates each chain block 10 on the ground 2a near the wellhead 3a, the main bar 37a and the force distribution bar 37b are made into the rebar cage 37, and the work to build in the vertical hole 3 is performed. You can do it. In this way, rebar cage 3
When the assembled part of 7 is lowered into the vertical hole 3, each main bar 37a forming the rebar cage 37 moves downward relative to each main bar disposition portion 71 of the gauge disk 7. At this time, since the stoppers 72 are provided in the respective main reinforcement placement portions 71, the respective main reinforcements 37a are smoothly separated from the main reinforcement placement portion 71 in the radial direction without being displaced outward in the radial direction. You can move down.

By the way, as described above, the assembled rebar cage 37 that is lowered into the vertical hole 3 has the wellhead 3a located below the position where the force distribution bar 37b is connected to the main bar 37a.
In the vicinity, the slide guide 8 moves downward while passing through the reinforcing bar insertion space 8s. At this time, the slide guide 8 is provided at a position aligned with the gauge disc 7, and the center CL1 of the frame 6 on which the gauge disc 7 and the slide guide 8 are provided is the center CT of the vertical hole 3.
The shape is consistent with 1. Then, the slide guide 8 has an inner diameter, that is, a diameter D2 of the reinforcing bar insertion space 8s that is slightly larger than the outer diameter of the reinforcing bar cage 37 and is formed in an annular shape, so that the slide guide 8 passes through the reinforcing bar insertion space 8s. The rebar cage 37 in the completed portion can be guided into the inner surface of the slide guide 8 and can descend into the vertical hole 3 in such a manner that the member center of the rebar cage 37 is always aligned with the center CT1 of the vertical hole 3. .

In this way, as described above, between the lower frame frame 9 and the main bar arrangement portion 71 of the gauge disc 7, the main bars 37a of a predetermined number are arranged in correspondence with the respective bar arrangement positions. , And connecting the distribution bars 37b to the predetermined number of main bars 37a and assembling the reinforcing bar cage 37, the lower frame frame 9 is lowered by the driving operation of the chain block 10 by the length of the assembled reinforcing bar cage 37. By repeating the work of repeating the work in a predetermined cycle, the main bar 37a and the force distribution bar 37b are provided in the vertical hole 3,
It can be built in the state of the rebar cage 37 to which these are connected. Then, the rebar cage assembly and erection work can be performed on the ground 2a near the pit mouth 3a, and the worker 39 goes down into the pit of the vertical hole 3 or the scaffold is temporarily installed on the vertical hole 3 for the rebar assembly. There is no need to work at heights. In addition, when the length of the pile 30 to be formed and constructed, that is, the depth of the vertical hole 3 is larger than the length of one main bar 37a, the main bars 37a are sequentially lapped in the vertical direction in a form of successive addition,
Since the main bar 37a can have a predetermined length, the vertical hole 3
With the reinforcing bar building device 5 installed in the
The rebar cage 37 for the entire length can be built in, and there is no need to change the setup.

Further, in this way, when the rebar cage 37 of a predetermined length is assembled and installed in the vertical hole 37 in the assembled state, the lower frame frame 9 in which the vertical hole 3 is lowered for the rebar is installed. Reaches the bottom 3b of the hole. by this,
The reinforcing bar cage 37 is supported by the hole bottom 3b via the supporting portion 9a of the lower frame 9. Then, in the form of suspending the lower frame frame 9, the rebar cage 3 on the lower frame frame 9 is suspended.
The wire 11 that has supported the wire 7 is held by the hook holder 12 in such a manner that the hanging ring 13 is hooked on the hook engaging protrusion 12a projecting downward and is arranged in the hook arrangement groove 12b. Therefore, when the lower frame frame 9 reaches the hole bottom 3b, the suspension ring 13 is moved to the hook placement groove 12.
The hook engaging projection 12a moves downward with respect to b.
Get out of. As a result, the engagement state between the lower frame frame 9 (that is, the reinforcing bar cage 37 supported by the lower frame frame 9) and the wire 11 (that is, the chain block 10 to which the wire 11 is connected) is released. That is, the lower frame frame 9 is left as a consumable part of the reinforcing bar building device 5 on the hole bottom 3b, and the components other than the lower frame frame 9 are rebar cage 37.
Although it is separated and collected and diverted to the construction position of another pile 30, it is not necessary for the worker to enter the vertical hole 30 for the component collection work, and by operation of the chain block 10,
You can do this. That is, the safety is high.

Therefore, as described above, when the wire 11 is separated from the lower frame frame 9 via the suspension ring 13, the wire 11 is pulled up by the drive operation of each chain block 10, and the reinforcing bar building device 5 is removed from the vertical hole 3. if,
Immediately, the work of placing concrete in the vertical hole 3 can be performed. Further, the removed reinforcing bar building device can be diverted to the vertical hole 3 in which the reinforcing bar cage 37 has not been built yet, and a new reinforcing bar building work can be started. Therefore, the construction efficiency is good and the pile construction can be performed. A crane truck 40 is used to relocate the reinforcing bar building device 5 and to set the main bar 37a to the reinforcing bar building device 5 described above, but the reinforcing bar building device 5 holds the reinforcing bar cage 37. Since the cranes 40 are installed or relocated in a state where they are not installed, and the main bars 37a are set three by three, it is sufficient that the crane vehicle 40 is small in size. The rebar cage 37 is assembled in the vicinity of the wellhead 3a, and before the assembly, the main bar 37a and the semicircular force distribution bar 37b can be stacked and stored in a lying state. Therefore,
Installation of such a crane truck 40, main bar 37a, power distribution bar 3
No extensive space is occupied for the storage of rebar such as 7b.

In the above-described embodiment, the cylindrical rebar cage 37 along the side wall 3c of the cylindrical vertical hole 3 is formed.
However, the shapes of the vertical hole 3 and the reinforcing bar cage 37 are not limited to this. Therefore, a reinforcing bar assembly such as the reinforcing bar cage 37 may be built in the center of the vertical hole 3. Further, a reinforcing bar assembly having a plate shape as a whole may be built in the wall-shaped vertical hole. Further, in the embodiment, the main reinforcement 3 which is the jig for suspending the reinforcing bar according to the present invention is used when the pile 30 is installed.
Although the example used to set 7a in the reinforcing bar building device 5 has been described, the application of the reinforcing bar hanging jig of the present invention is not limited to this, and can be used for hanging other long reinforcing bars. Of course, it may be used. In addition, in the embodiment, in the main bar suspension 21 that is a reinforcing bar suspension jig,
The example in which the suspension engaging means provided in the sheath pipe 22 is composed of the connecting member 23, the pulling wire 25, and the bundling jig 26 has been described, but the suspension engaging means includes the main bar suspension 21 and the crane. Other configurations may be adopted as long as they can be engaged with the hook block 41 of the vehicle 40 to suspend the main bar 37a which is the reinforcing bar grasped by the clamp 27 which is the reinforcing bar clamp. . Further, in the embodiment, the example in which the three sheath tubes 22 are integrally connected by the connecting means 23 has been described, but one of the plurality of sheath tubes 22 is bundled through the pulling wire 25. Jig 26
It is also possible that the interval between the plurality of sheath tubes 22 is variable in the form of being suspended below. That is, by this, it is possible to deal with the reinforcement of various pitches. Further, the numbers of the sheath tubes 22 and the clamps 27 arranged are arbitrary.

[0032]

As described above, according to the present invention, the sheath tube 22 is provided, and the sheath tube 22 is provided with a reinforcing bar insertion space such as the main bar insertion space 22s and a reinforcing bar such as the main bar 37a. It is formed so that it can be inserted movably along the direction, and a reinforcing bar clamp such as a clamp 27 that can hold a reinforcing bar is hung on the sheath tube 22, and the connecting member 23 and the pulling wire 25 are connected to the sheath tube 22. Since the suspension engaging means such as the bundling jig 26 is provided, if the reinforcing bar inserted into the reinforcing bar insertion space is held by the reinforcing bar clamp, the reinforcing bar is suspended by the suspending engaging means. Can be supported. As a result, the reinforcing bar gripped by the reinforcing bar clamp is suspended and held under the pulling device such as the hook block 41 of the crane vehicle 40 with which the suspending engagement means is engaged. That is, the reinforcing bar is hung under the suspending engagement means by its own weight, with the lower part of the reinforcing bar being gripped by the reinforcing bar clamp. Therefore, it is possible to preferably stand the ground on the ground by moving the traction device upward from the state in which the reinforcing bar is laid down sideways, inserted into the reinforcing bar insertion space and held by the reinforcing bar clamp.
Then, in the state in which the reinforcing bar is erected, the reinforcing bar clamp is arranged below the reinforcing bar. Then, in this state (actually, after the standing reinforcing bar is held by a device other than the pulling device such as the reinforcing bar erection device 5), it is easy to release the gripped state of the reinforcing bar clamp by ground work. I can. Then, when the traction device is further moved upward, the rebar is movable in the rebar insertion space along the material axis direction (that is, the vertical direction when the rebar is erected). On the other hand, the sheath tube 22 is pulled out of the reinforcing bar in such a manner that the reinforcing bar insertion space of the sheath tube 22 moves relatively upward. As a result, the engagement state between the reinforcing bar suspension jig and the reinforcing bar is released. That is, the present invention can be separated from the crane without a complicated mechanism, with a simple device configuration, and with the rebar erected, without working at height. Therefore, if the present invention is used when suspending reinforcing reinforcing bars for constructing deep foundation piles by using cast-in-place concrete, even if the reinforcing bars are long, the reinforcing bars are actually used by crane operation. It is very convenient because it can be set up according to the state of the bar arrangement, and then it can be separated from the crane by ground work.

Further, in the present invention, the suspension engagement means is provided with a plurality of the sheath pipes 22 and the reinforcing bar clamps so that the sheath pipes 22 and the reinforcing bar clamps correspond to each other in a one-to-one correspondence, and the reinforcing bars are suspended. When the jig is configured, the suspension engagement means can suspend and support a plurality of reinforcing bars together. Further, the work of separating the plurality of reinforcing bars from the crane can be easily performed by operating the reinforcing bar clamp on the ground as described above. Therefore, when it is desired to collectively assemble several reinforcing bars, this can be suitably performed, and the work efficiency relating to the reinforcing bar assembly is further improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a state of a pile construction site where a reinforcing bar erection work is being performed by a reinforcing bar erection device using an example of a reinforcing bar suspension jig according to the present invention.

FIG. 2 is an enlarged view showing the vicinity of a wellhead at the pile construction site shown in FIG.

FIG. 3 is a plan view showing a portion of a gauge disc of the reinforcing bar building device shown in FIG.

FIG. 4 is an enlarged view of a portion of the gauge disc shown in FIG.

5 is a plan view showing a slide guide portion of the reinforcing bar building device shown in FIG. 1. FIG.

6 is a cross-sectional side view of a portion of a lower frame of the reinforcing bar building device shown in FIG.

FIG. 7 is a diagram showing a state where main bars are attached to the reinforcing bar building device shown in FIG. 1 by using a reinforcing bar suspension jig.

FIG. 8 is a series of views showing a manner in which a distribution bar is welded to a main bar in the pile construction site shown in FIG.

[Explanation of symbols]

 21 ... Reinforcing bar suspending jig (main reinforcing bar suspender) 22. Pulling wire) 26 ... Suspension engaging means (bundling jig) 27 ... Reinforcing bar clamp (clamp) 37a ... Reinforcing bar (main bar)

Claims (2)

[Claims] 1. A sheath tube is provided, and a reinforcing bar insertion space is formed in the sheath tube so that the reinforcing bar can be inserted along the axial direction of the reinforcing bar so that the reinforcing bar is grasped by the sheath tube. A reinforcing bar suspension jig configured by suspending a flexible reinforcing bar clamp and providing a suspension engagement means on the sheath pipe. 2. The reinforcing bar suspension according to claim 1, wherein the suspension engagement means is provided with a plurality of the sheath pipes and the reinforcing bar clamps in such a manner that the sheath pipes and the reinforcing bar clamps have a one-to-one correspondence. Lowering jig.