JP2000225433A - Production of long size multidirection x shape arrangement assembly reinforcing bar and double reinforcing bar cage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a long size multidireciton arrangement assembly reinforcement bar by using an existing reinforcing bar cage forming machine for a production of a parallel arrangement assembly reinforcement bar. SOLUTION: At the time of producing a long size multidirection X shape arrangement assembly reinforcing bar by using a reinforcing bar cage forming machine A arranged with a support rod 3 to be able to switch an expanded state and a retracted state for a rotation shaft 1, a first ring support device 12 to approach/support an element reinforcing bar fixing ring 13 and an element reinforcing bar positioning ring 14 each other, a second ring support device 12 to support the element reinforcing bar fixing ring only, a third ring support device 12 to support an element reinforcing bar center fixing frame 15, which protrudes a reinforcing bar support arm from a ring outer peripheral face in the radial direction, and the element fixing ring only and a forth ring support device 12 to approach/support the element reinforcing bar fixing ring and the element reinforcing bar positioning ring each other, are fixed to the prescribed positions of the support rod 3, the long size multi-direction X shape arrangement assembly reinforcing bar is produced while preventing deflection.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a long multi-directional X-shaped reinforcing bar buried in a cast-in-place concrete pile or a pier, and a long multi-directional X-shaped reinforcing bar manufactured by the method. The present invention relates to a method for manufacturing a double-bar cage using a reinforcing bar assembly bar.

[0002]

2. Description of the Related Art The present inventor has proposed a substantially horizontal rotating shaft which can be switched between a state of being supported at both ends and a state of cantilever support, and a plurality of rotating shafts arranged at equal intervals around the rotating shaft. Reinforcing cage provided with a plurality of support rods supported in parallel with each other via a parallel link and configured to be switchable between an expanded state and a contracted state by swinging the parallel link with respect to the rotation axis. Long multi-directional X using knitting machine
Japanese Patent Application No. 9-2737 discloses a method for manufacturing a reinforcing bar assembly reinforcing bar.
No. 40 has already been proposed.

This manufacturing method comprises a substantially horizontal rotating shaft configured to be switchable between a supported state at both ends and a cantilevered state, and a plurality of parallel links disposed around the rotating shaft at equal intervals and connected to the rotating shaft. Rebar cage knitting machine comprising a plurality of support rods supported in parallel with each other via a shaft and configured to be switchable between an expanded state and a contracted state by swinging the parallel link with respect to the rotation axis. A method for manufacturing a long multi-directional X-shaped reinforcing bar assembly reinforcing bar using

[0004] An element rebar fixing ring and an element rebar positioning ring having an outer diameter equal to or slightly smaller than the element rebar fixing ring and having a number of rebar positioning pieces projecting from the outer peripheral surface of the ring are brought close to and detachable from each other. The first to support
Ring support device, a second ring support device for detachably supporting only the element reinforcing bar fixing ring, an inner ring and an outer ring concentrically located in the same plane, and an inner and outer ring in the circumferential direction. An element rebar center fixing frame having a connecting rod connected at the portion, a third ring support device for detachably supporting only the element rebar fixing ring, an element rebar fixing ring, and an outer diameter of the element rebar fixing ring. A fourth ring support device for detachably supporting an element rebar positioning ring in which a number of rebar positioning pieces are protruded from an outer surface of the same or slightly smaller ring so as to be close to each other, and a reduced support. From the end of the rod,

[0005] By switching the support rod to the expanded state, the first and second ring support devices and the third and fourth ring support devices are fixed at predetermined positions on both ends of the support rod, and are supported. The element reinforcing bar center fixing frame is fixed at a predetermined position in the center of the rod so that these support devices and the fixing frame rotate integrally with the rotation shaft, and both ends are parallel to each other and the center is relative to both ends. In a state in which both ends of the required number of element rebars bent into a state of being inclined at a predetermined angle are positioned by the rebar positioning pieces of the element rebar positioning ring, the rotation direction is directed to the outer surface of the element rebar fixing ring. Fixed at predetermined intervals, and, after assembling the inner rebar group by fixing the diagonal streaks of the element rebar to the outer surface of the inner ring of the element rebar center fixing frame, on the outer surface of the element rebar fixing ring, In a state where both ends of the same number of element rebars in which the inclination directions of the rebars are reversed are positioned by the rebar positioning pieces of the element rebar positioning ring, those oblique lines are X-shaped with the corresponding oblique lines of the inner rebar group. , And the oblique streaks of the element rebar are fixed to the outer surface of the outer ring of the element rebar central fixing frame to assemble the outer rebar group, and are elongated by the inner rebar group and the outer rebar group. The present invention is characterized in that a multi-directional X-shaped reinforcing bar assembly reinforcing bar is constituted.

[0006]

Problems to be Solved by the Invention Japanese Patent Application No. 9-27374
According to the above-described manufacturing method proposed in No. 0, the element rebars constituting the inner rebar group are supported by the element rebar fixing rings having both ends arranged at two positions, and the central part of the diagonal rebar is element rebar. Since it is supported by the inner ring of the central fixed frame, even if the element rebar is long, bending is prevented. The element rebars constituting the outer rebar group are also supported by the above-described element rebar fixing rings, both ends of which are arranged at two places each, and the center part of the diagonal rebar is supported by the outer ring of the element rebar central fixing frame. Even if the element rebar is long, bending is prevented.

[0007] Therefore, the reinforcement of the element rebar is accurately performed,
A long (for example, about 6 to 14 m) multi-directional X-shaped reinforcing bar assembly rebar buried in a cast-in-place concrete pile or a pier can be manufactured. Then, after manufacturing, the rotating shaft is switched to the cantilever support state, and the supporting rod is switched to the contracted state, and the product (long multi-directional X-shaped reinforcing bar assembly reinforcing bar) is extracted to the free end side of the rotating shaft. , To be taken out of the machine.

However, in the manufacturing method proposed in Japanese Patent Application No. 9-273740, the center fixing frame of the element reinforcing bar is formed such that the inner ring and the outer ring, which are concentrically located in the same plane, and the inner and outer rings are circumferentially arranged. Since it is composed of connecting rods that are connected in a part of the direction, when assembling the inner reinforcing bar group, it is troublesome to insert a long element reinforcing bar between the outer ring of the element reinforcing bar central fixing frame and the outer ring. Work has been required, and this has been a factor in reducing the production efficiency of long multi-directional X-shaped reinforcing bar assembly reinforcing bars.

The present invention improves on this point, and can assemble a long multi-directional X-shaped reinforcing bar when attaching any of the inner and outer reinforcing bars, by attaching a long elemental reinforcing bar from the side. A first object is to enable efficient production.

[0010] A second object of the present invention is to provide a method for manufacturing a double-reinforcing cage comprising a long multi-directional X-shaped reinforcing bar assembly reinforcing bar manufactured by the above-described method and an external reinforcing bar cage arranged in parallel. To provide.

[0011]

The technical means taken by the present invention to solve the above problems are as follows. That is, a first aspect of the present invention is directed to a substantially horizontal rotating shaft configured to be switchable between a state of supporting both ends and a state of cantilevering, and a plurality of parallel links disposed around the rotating shaft at equal intervals and connected to the rotating shaft. Rebar cage knitting machine comprising a plurality of support rods supported in parallel with each other via a shaft and configured to be switchable between an expanded state and a contracted state by swinging the parallel link with respect to the rotation axis. Long multi-directional X using
A method of manufacturing a reinforcing bar assembly reinforcing bar,

An element rebar fixing ring and an element rebar positioning ring having an outer diameter equal to or slightly smaller than the element rebar fixing ring and having a number of rebar positioning pieces projecting from the outer peripheral surface of the ring are detachably mounted close to each other. The first to support
Element reinforcing bar center fixing frame comprising: a ring supporting device, a second ring supporting device for detachably supporting only the element reinforcing bar fixing ring, and a plurality of reinforcing bar supporting arms radially protruding from the outer peripheral surface of the ring. A third ring support device for detachably supporting only the element reinforcing fixing ring, an element reinforcing fixing ring, and a number of reinforcing bar positioning pieces on the outer peripheral surface of the ring having an outer diameter equal to or slightly smaller than the element reinforcing fixing ring. And a fourth ring support device for detachably supporting the rebar positioning ring, which is provided with the projecting element, in close proximity to each other, and fitted in this order from one end of the support rod in a reduced state,

By switching the supporting rod to the expanded state, the first and second ring supporting devices and the third and fourth ring supporting devices are fixed at predetermined positions on both ends of the supporting rod, and the supporting rod is supported. The element rebar central fixing frame is fixed at a predetermined position in the center of the rod via a non-slip metal fitting fixed to the element rebar central fixing frame and slidably fitted to the support rod in the axial direction. The required number of element reinforcing bars are formed by bending the supporting device and the fixed frame so as to rotate integrally with the rotation shaft, and bending the both ends in parallel with each other and forming a diagonal streak having a central portion inclined at a predetermined angle with respect to both ends. Both ends of
In a state where the element rebar positioning ring is positioned by the rebar positioning piece, the element rebar fixing ring is fixed to the outer surface of the element rebar fixing ring at predetermined intervals in the rotation direction, and the oblique streaks of the element rebar are fixed to each of the element rebar center fixing frames. After assembling the inner rebar group by fixing it to one side surface of the rebar supporting arm, the both ends of the same number of the element rebars having the same diagonal direction of the oblique bars are attached to the outer surface of the element rebar fixing ring. With the positioning by the reinforcing bar positioning piece of the positioning ring, the diagonal streaks are fixed in a state of crossing the corresponding diagonal streaks of the inner reinforcing bar group in an X-shape, and the diagonal streak of the element reinforcing bar is fixed at the center of the element reinforcing bar. An outer rebar group is fixed to the one side surface of each rebar supporting arm of the frame, and an inner rebar group and an outer rebar group constitute a long multi-directional X-shaped rebar assembly rebar.

As a means for fixing the element reinforcing bar to one side surface of the element reinforcing bar fixing ring and one side of the reinforcing bar supporting arm of the element reinforcing bar central fixing frame, welding is generally used. Good.

According to the above construction, the element reinforcing bar center fixing frame is composed of the ring and the plurality of reinforcing bar supporting arms radially protruding from the outer peripheral surface thereof. The element rebar can be supplied from the side of the rotation axis, and the oblique line of the element rebar can be applied to one side surface of the rebar supporting arm of the element rebar central fixing frame.

Accordingly, the troublesome work of inserting the long element reinforcing bar into the center frame of the element reinforcing bar from the axis of the rotating shaft is eliminated, and the assembling of the inner and outer reinforcing bars can be performed without any trouble. You can install the element rebar from the side,
It is possible to efficiently manufacture a long multi-directional X-shaped reinforcing bar assembly reinforcing bar.

According to a second aspect of the present invention, a parallel reinforcing bar having a larger diameter than the long multi-directional X-shaped reinforcing bar assembly is attached around the elongated multi-directional X-shaped reinforcing bar assembly reinforcing bar manufactured by the method of claim 1. A plurality of rings are inserted at appropriate intervals, and a plurality of rings corresponding to the gap formed between the outer peripheral surface of the element reinforcing bar fixing ring and the inner peripheral surface of the parallel reinforcing bar fixing ring are attached to the element reinforcing bar fixing ring. The spacers are welded, and a parallel reinforcing-bar mounting ring is welded to the outer periphery of the spacer group. On the other hand, a supporting reinforcing bar is welded to the remaining parallel-bar mounting rings in a crossbeam shape, and the parallel-bar mounting ring is connected to the supporting rod. To the long multi-directional X-shaped reinforcing bar assembly bar, and then weld a plurality of parallel reinforcing bars over the outer peripheral surface of all parallel bar mounting rings. Hoops are wrapped around the reinforcing bars and fixed, and It has been outside rebar cage and long multi-directional X
The present invention is characterized in that a double-reinforcing cage consisting of a shape-reinforcing assembly reinforcing bar is manufactured.

According to the above arrangement, even when the reinforcing bars for parallel reinforcing bars are long, when the hoop bars are wound around the group of reinforcing bars for parallel reinforcing bars and fixed, the reinforcing bars for parallel reinforcing bars are bent. The reinforcing bars for the parallel reinforcing bars will be accurately arranged without using the same reinforcing bar knitting machine. Can be manufactured.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1 to FIG. 4, A indicates a rebar cage knitting machine known as a device for manufacturing long parallel reinforcing bar assembled rebar buried in a cast-in-place concrete pile, a bridge pier, or the like. The rebar cage knitting machine A includes a substantially horizontal rotating shaft 1 configured to be switchable between a state of supporting both ends and a state of cantilevering, and a plurality of parallel rotating shafts 1 arranged around the rotating shaft 1 at equal intervals. And four support rods 3 supported in parallel with each other via a link 2.

A parallel quadruple link mechanism is constituted by the rotating shaft 1, the parallel link 2 and the support rod 3, and the hydraulic cylinder device 4 swings the parallel link 2 around the pivot point with respect to the rotating shaft 1. The support rod 3 is configured to be switchable between an expanded state and a contracted state so as to open and close the umbrella bone.

Reference numeral 5 denotes a driving unit capable of intermittently driving the rotating shaft 1 in a desired direction (for example, 45 degrees) in an arbitrary direction, and 6 denotes a shaft end of the rotating shaft 1 on the opposite side to the driving unit 5. And a state where the support of the shaft end is released. A traveling crane 7 travels on a rail provided along the upper portion of the rotating shaft 1, and a carriage 8 travels on a rail provided along the lower portion of the rotating shaft 1. Have. Reference numeral 9 denotes a traveling bogie on which a reinforcing bar 10 for a hoop rein wound in a coil shape is mounted. The traveling bogie 9 is arranged in parallel by moving the traveling bogie 9 in the axial direction of the rotating shaft 1 while feeding out the rebar 10. The hoop muscle is configured to be spirally wound around the outer periphery of the main muscle group.

In this embodiment, a long (for example, about 6 to 14 m) multi-directional X-shaped reinforcing bar assembly reinforcing bar buried in a cast-in-place concrete pile, a pier, or the like using the above-described reinforcing bar knitting machine A. B can be manufactured.

As shown in FIGS. 3, 12, 13 and the like, the element reinforcing bar 11 which is the main reinforcing bar of the elongated multi-directional X-shaped reinforcing bar assembly reinforcing bar B has both ends a parallel to each other and a center at both ends a And a bent multi-directional X-shaped rebar assembly B
In order to manufacture the same, two types of the element rebars 11 for the inner rebar group and the element rebars 11 for the outer rebar group in which the inclination directions of the oblique bars b are opposite to each other are equal in number (for example, 8 in total, 16 in total). Book) is prepared.

In manufacturing a long multi-directional X-shaped reinforcing bar assembly rebar B using the above-described rebar cage knitting machine A, at least four pieces (first to first) manufactured as attachments of the rebar cage knitting machine A are required. The ring support device 12 of 4) is used. Further, the bending of the element reinforcing bar 11 is prevented and the element reinforcing bar 1
In order to accurately maintain the plane made by the element 1, at least four element reinforcement fixing rings 13 for fixing the two ends a of the element reinforcement 11 at both ends, and both ends of the element reinforcement 11 with respect to the element reinforcement fixing ring 13. Two element rebar positioning rings 14 for accurately arranging the portion a and one element rebar center fixing frame 15 for fixing the center of the oblique line b are used.

As shown in FIG. 7, the element reinforcing bar fixing ring 13 is formed by processing a reinforcing bar into a ring shape, and the diameter thereof is set to be equal to the thickness of the long multi-directional X-shaped reinforcing bar assembly reinforcing bar B to be manufactured. Yes, it is. The element rebar positioning ring 14 is shown in FIG.
As shown in FIGS. 9B, 10, 11, etc., the outer diameter is slightly smaller than the element reinforcing bar fixing ring 13 (may be the same as the outer diameter of the element reinforcing bar fixing ring 13). A large number of rebar positioning pieces 17 are provided in a protruding manner. The outer diameter of the ring 16 is set to the element rebar fixing ring 1
The reason why the outer diameter is 3 or less is that both ends a of the element reinforcing bar 11 abut on the element reinforcing bar fixing ring 13 in a state where the element reinforcing bar 11 is positioned.

The ring 16 may be made of rebar,
In this embodiment, the ring 16 is made of a flat bar. Then, the outer peripheral surface of the flat bar steel ring 16, are bent in a trapezoidal shape, positioning the elements reinforcing bar 11 for the inner reinforcement in one aspect S _1, an element reinforcing bar 11 for the outer reinforcing bars with side S ₂ of the opposite A plurality (eight in the illustrated example) of steel bar positioning pieces 17 configured to be positioned are welded to form the element reinforcing bar positioning ring 14. This rebar positioning piece 17
Since the reinforcing bar positioning piece 17 is supported at two locations in the circumferential direction by the flat bar ring 16, it is very robust and can be used many times.

The element reinforcing bar center fixing frame 15 is manufactured by processing a reinforcing bar, and as shown in FIGS. 5 and 6, a ring 15a formed by bending a reinforcing bar and radially protruding from an outer peripheral surface thereof. The outer diameter of the ring 15a is the minimum diameter portion (longitudinal direction) of the inner rebar group in the long multi-directional X-shaped reinforcing bar assembly B to be manufactured. It is set to the outer diameter inscribed in the (center). A mark is marked on a part of the ring 15a in the circumferential direction, and the ring 15a is fitted over the support rod 3 so that the mark is located directly above. Then, in a state where the element reinforcing bar center fixing frame 15 is arranged at a predetermined position at the center of the support rod 3, a non-slip metal fitting 15c fitted to the support rod 3 slidably in the axial direction.
Is welded to the element reinforcing bar center fixing frame 15, and the element reinforcing bar center fixing frame 15 is fixed so as to rotate integrally with the rotating shaft 1 via the anti-slip metal 15c. Non-slip metal fitting 15c shown
Is made by bending a wire rod, and the ring 15a
And a bent portion that is fitted to the support rod 3 so as to be slidable in the axial direction.

As shown in FIGS. 7 and 8, the first to fourth ring supporting devices 12 protrude radially from the ring-shaped member 18 and attach / detach the element reinforcing bar fixing ring 13 to the outer end. A plurality of arms 22 provided with support portions 21 that can be freely supported (the number is set to four in this embodiment because it is necessary to match the number of support rods 3). And an engagement portion 20 provided at an inner end of each arm 22. 4 corresponding to arm 22
Of a pair of engaging portions 20 facing each other
Has a groove into which the support rod 3 is fitted, while the other pair of engaging portions 20 is formed in a shape in which one side of the groove is cut off at approximately 45 degrees. This is because the support rods 3 are switched from the contracted state to the expanded state while the weight of the ring support device 12 is given to the support rods 3, whereby the four support rods 3 engage with the respective engaging portions 20. In other words, as shown by phantom lines in FIG. 8, the ring support device 12 is fitted over the support rod 3 in the contracted state, and the groove of the engaging portion 20 is fitted over the support rod 3 coming directly above. And the weight of the ring support device 12 is
In this state, the support rod 3 is switched to the expanded state, so that the left and right support rods 3 are engaged with the left and right engagement portions 20.

The support portion 21 formed at the outer end of the arm 22
Is configured such that the position thereof can be adjusted in the arm longitudinal direction with respect to the arm 22 by a screw mechanism, and the arm 22 can be attached and detached and replaced. As the support part 21, the cross-sectional shape is an upward U-shape,
Two types having different widths are prepared. As shown in FIG. 9A, a state in which only the element reinforcing bar fixing ring 13 is detachably supported by the narrow support portion 21 and FIG.
As shown in (B), a state in which the element reinforcing bar fixing ring 13 and the element reinforcing bar positioning ring 14 are brought close to each other and supported detachably by the wide support portion 21 can be selected.

Next, a method of manufacturing a long multi-directional X-shaped reinforcing bar assembly reinforcing bar B will be described. First, as shown in FIG. 2, the support rod 3 is set in a contracted state, the rotating shaft 1 is set in a cantilever support state, and the element reinforcing bar fixing ring 13 and the element reinforcing bar positioning ring 14 are brought close to each other and are detachably attached. A first ring support device 12 for supporting, a second ring support device 12 for detachably supporting only the element reinforcing bar fixing ring 13,
An element rebar central fixing frame 15, a third ring support device 12 that detachably supports only the element rebar fixing ring 13,
Element reinforcing bar fixing ring 13 and element reinforcing bar positioning ring 14
And a fourth ring supporting device 12 that detachably supports the rotating shaft 1 in close proximity to each other, is fitted in this order from one end of the supporting rod 3, and is disposed at a predetermined position in the axial direction of the rotating shaft 1. Switch to a state where both ends are supported. The cart 8 is arranged below the rotating shaft 1 with the receiving stand 8a lowered.

In this state, by switching the support rod 3 to the expanded state, the first and second ring support devices 12 and the third and fourth ring support devices 12 are positioned at predetermined positions on both ends of the support rod 3. Are fixed, and rotate integrally with the rotating shaft 1. In addition, the element rebar positioning rings 14 on both sides are
The element rebar positioning ring 14 and the ring support device 12
A predetermined phase is set by matching with a mark (not shown) for phase adjustment provided in advance in the above. Further, the support rod 3 is switched to the expanded state, and the non-slip metal fitting fitted to the support rod 3 in a state where the element reinforcing bar center fixing frame 15 is temporarily fixed at a predetermined position at a predetermined position in the center of the support rod 3. By welding 15 c to the element reinforcing bar center fixing frame 15, the element reinforcing bar center fixing frame 15 is fixed, and rotates integrally with the rotating shaft 1.

Thereafter, as shown in FIG. 3, the element reinforcing bar 11 for the inner reinforcing bar is inserted from the side of the rotating shaft 1 into the reinforcing bar knitting machine A.
As shown in FIG. 12, both ends of the element reinforcing bar 11 are applied to one side surface of a predetermined reinforcing bar positioning piece 17 of the element reinforcing bar positioning ring 14 on both sides, and the element reinforcing bar 11 is positioned. 11 oblique streaks,
As shown in FIG. 6 and FIG. 12, the element reinforcing bar is placed on one side surface S of the reinforcing bar support arm 15b of the central fixing frame 15 for the reinforcing bar.

In this state, when the plane including both ends and the oblique lines of the element reinforcement 11 is denoted by A _in , and the center line of the element reinforcement 11 (center line parallel to both ends) is denoted by C. The plane A _in formed by the element reinforcing bar 11 is positioned so as to be perpendicular to an arbitrary virtual plane including the rotation axis of the rotation shaft 1 and the center line C is located in the virtual plane. Also, in this positioned state, both ends of the element reinforcing bar 11 are in contact with the outer surface of the element reinforcing bar fixing ring 13 as shown in FIGS. 9A and 9B.
As shown in FIG. 6, the oblique streak portion of the element reinforcing bar 11 also contacts the outer surface of the ring 15 a of the element reinforcing bar central fixing frame 15.

When the element reinforcing bar 11 is positioned, the contact portions between both ends of the element reinforcing bar 11 and the element reinforcing bar fixing ring 13 are fixed, and the oblique streaks of the element reinforcing bar 11 and the reinforcing bar supporting arm of the element reinforcing bar center fixing frame 15 are fixed. The contact portion with 15b is fixed. As these fixing means, welding, bonding, binding and the like can be arbitrarily employed, but in this embodiment, welding is employed. The same applies to the following.

After fixing the first elemental reinforcing bar 11 to the elemental reinforcing bar fixing ring 13 and the elemental reinforcing bar center fixing frame 15, the rotary shaft 1 is rotated by 45 degrees, and the second elemental reinforcing bar 11 is rotated in the same manner. Supply, positioning, and fixing are performed, and thereafter, every time the rotating shaft 1 is rotated 45 degrees in one direction, the same procedure is repeated, and all eight element reinforcing bars 11 are attached to the element reinforcing bar fixing ring 13 and the element reinforcing bar center fixing frame 15. Fixed,
The inside reinforcing bar group 35 as shown in FIG. 13 is assembled.

Thereafter, as shown in FIG. 3 and FIG. 13, the element reinforcing bar 11 for the outer reinforcing bar in which the inclination direction of the oblique bar b is reversed.
Is supplied from the side of the rotating shaft 1. And element rebar 1
6 is applied to the other side surface of the predetermined reinforcing bar positioning piece 17 of the element reinforcing bar positioning ring 14 on both sides, the element reinforcing bar 11 is positioned, and the oblique streak portion of the element reinforcing bar 11 is changed as shown in FIG. , Element rebar central fixed frame 1
5 is placed on the one side (the same side as the side where the oblique streaks of the element reinforcing bars for the inner reinforcing bars come into contact) S of the reinforcing bar supporting arm 15b.

In this state, the element rebar 11 has a plane A _out including both ends and the oblique line portion of the element rebar 11 and a center line C (a center line parallel to both ends) of the element rebar 11, The plane A _out formed by the element rebar is positioned so as to be perpendicular to an arbitrary virtual plane including the rotation axis of the rotation shaft 1 and the center line C is located in the virtual plane. In this positioned state, both ends of the element reinforcing bar 11 are on the same circumference as both ends of the element reinforcing bar for the inner reinforcing bar, and are in contact with the outer surface of the element reinforcing bar fixing ring 13. As shown in FIG. 6, the oblique streaks of the reinforcing bars 11 are located outside the oblique streaks of the element reinforcing bars for the inner reinforcing bars.

When the element reinforcing bar 11 for the outer reinforcing bar is positioned, both ends of the element reinforcing bar 11 and the element reinforcing bar fixing ring 13 are fixed.
Is fixed, and the contact portion between the oblique streaks of the element rebar 11 and the rebar supporting arm 15b of the element rebar center fixing frame 15 is fixed.

When the first element reinforcing bar 11 is fixed to the element reinforcing bar fixing ring 13 and the element reinforcing bar center fixing frame 15, the rotating shaft 1 is rotated by 45 degrees, and the second element reinforcing bar 11 is fixed in the same manner. Supply, positioning, and fixing are performed, and thereafter, every time the rotating shaft 1 is rotated 45 degrees in one direction, the same procedure is repeated, and all eight element reinforcing bars 11 are attached to the element reinforcing bar fixing ring 13 and the element reinforcing bar center fixing frame 15. Fixed,
Assemble the outer rebar group. The oblique streaks b of the element rebars 11 in the outer rebar group intersect with the diagonal streaks b of the corresponding element rebars 11 in the inner rebar group in an X-shape, and the inner rebar group and the outer rebar group have a long multidirectional X-shaped arrangement. The assembled reinforcing bar B is configured.

FIG. 14 shows the positional relationship between the element reinforcing bar positioning rings 14 on both sides and both ends of the element reinforcing bars 11, and the white circles indicate the both ends of the element reinforcing bars 11 for the inner reinforcing bars and their arrangement. The black circles indicate the both ends of the element reinforcing bar 11 for the outer reinforcing bars and the order of the reinforcing bars.

When the manufacture of the elongated multi-directional X-shaped reinforcing bar assembly B is completed, the pedestal 8a is raised, and the weight of the elongated multi-directional X-shaped reinforcing bar assembly B is deposited on the receiving table 8a. Open the bearing 6 and switch the rotating shaft 1 to a cantilever support state,
Further, the support rod 3 is switched to the contracted state, and as shown in FIG. 4, the carriage 8 is caused to travel outward, and the product (long multi-directional X-shaped reinforcing bar assembly B) is carried out of the machine.

Further, since the first to fourth ring support devices 12 and the element rebar positioning rings 14 are taken out of the machine together with the product while being attached to the product, as shown in FIG.
By adjusting the position of the support portion 21 at the tip of the arm 22 in a wide space with no obstacles around, the substantial length of the arm 22 is reduced, and the ring support device 12 and the element reinforcing member positioning ring 14 are separated from the product. Will be collected.

The elongated multi-directional X-shaped reinforcing bar assembly B manufactured by the above-described method is used by being inserted into a reinforcing rod cage of a pile by, for example, on-site work. Before the X-shaped reinforcing bar assembly rebar B is carried out from the rebar cage knitting machine A, the following steps are added so that the external reinforcing bar cage and the length of the parallel reinforcing bar composed of the linear main bar group and the hoop bar are added. It is possible to manufacture a double-reinforcing cage composed of the multi-directional X-shaped reinforcing bar assembly reinforcing bar B.

FIGS. 15 to 21 show a method of manufacturing a double reinforced cage.
It is as follows based on description. That is, first, the receiving stand 8a is slightly raised, and the weight of the long multi-directional X-shaped reinforcing bar assembly reinforcing bar B is deposited on the carriage 8, the support rod 3 is reduced, the bearing unit 6 is opened, and the rotation is performed. Set the shaft 1 in a cantilever state.

In this state, 7 to 9 rings (for example, manufactured by processing a reinforcing bar into a circular shape) 36 for attaching a parallel reinforcing bar having a diameter larger than that of the elongated multi-directional X-shaped reinforcing bar assembly reinforcing bar B are used. (For example, eight) The suspension is suspended on the hook of the traveling crane 7 and carried into the machine, and as shown in FIG. 15, the bearing 6 is closed and the rotating shaft 1 is returned to the double-supported state.

Thereafter, the support rod 3 is expanded,
With the cradle 8a lowered, the parallel reinforcing ring 3
6 is placed at a predetermined position, and fitted around the long multi-directional X-shaped reinforcing bar assembly reinforcing bar B at appropriate intervals.

Next, the first to fourth ring support devices 12
As shown in FIG. 18, an interval L formed between the outer peripheral surface of the element reinforcing bar fixing ring 13 and the inner peripheral surface of the parallel reinforcing bar mounting ring 36 is
And eight parallel spacers are welded to the outer periphery of each spacer group, while four supporting reinforcing bars 36b are respectively attached to the remaining parallel muscle mounting rings 36. By welding the support bars 3 in the expanded state at the four corners in a cross-girder manner, the parallel reinforcing bar mounting ring 36 is coaxially formed on the support bars 3 with the elongated multi-directional X-shaped reinforcing bar assembly reinforcing bar B. Let them support you.

Thereafter, as shown in FIGS. 16 and 19,
A plurality of parallel reinforcing bars 38 are fixed to the entire outer peripheral surface of the parallel reinforcing ring 36 by welding, and a hoop reinforcing bar 10 wound in a coil shape from the traveling vehicle 9 is fed out, as shown in FIG. In addition, these reinforcing bars for parallel reinforcing bars 3
The hoop bars 10a are spirally wound around and fixed around the eight groups, and as shown in FIG. 21, external reinforcing bars arranged in parallel (reinforcing bars constituted by main bars and hoop bars arranged in parallel). ) and it is for producing the elongated multidirectional X Katachihaisuji consisting of assembling rebar B double reinforcing bar cage B _2.

[0049] When manufacturing the double reinforcing bar cage B ₂ is completed, by raising the pedestal 8a, after deposited the cradle 8a the weight of the double reinforcing bar cage B _2, open the bearing portion 6, the rotating shaft 1 is switched to the cantilever support state, and the support rod 3 is switched to the contracted state, and as shown in FIG. 17, the carriage 8 is moved outward, and the product (the double-reinforced basket B ₂ ) is taken out of the machine. Take it out. Then, in a wide space with no obstacles around, the first to fourth
The ring support device 12 and the two element rebar positioning rings 14 are separated and recovered from the product.

[0050]

As described above, according to the present invention, a long multi-directional X-shaped reinforcing bar assembly reinforcing bar can be manufactured using an existing reinforcing bar knitting machine, and furthermore, an external reinforcing bar cage arranged in parallel. This makes it possible to manufacture a double-reinforcing cage composed of a long multi-directional X-shaped reinforcing bar assembly reinforcing bar.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a reinforcing rod knitting machine.

FIG. 2 is a schematic side view for explaining a method of manufacturing a long multi-directional X-shaped reinforcing bar assembly reinforcing bar.

FIG. 3 is a schematic side view for explaining a method of manufacturing a long multi-directional X-shaped reinforcing bar assembly reinforcing bar.

FIG. 4 is a schematic side view for explaining an operation of separating and collecting a ring support device and an element reinforcing member positioning ring from a long multi-directional X-shaped reinforcing bar assembly reinforcing bar.

FIG. 5 is a perspective view for explaining an element reinforcing bar center fixing frame.

FIG. 6 is a front view of an element reinforcing bar center fixing frame.

FIG. 7 is a perspective view for explaining a first ring support device, and an element rebar fixing ring and an element rebar positioning ring supported thereon.

FIG. 8 is a front view of the ring support device.

FIG. 9 is a sectional view of a main part of the ring support device.

FIG. 10 is a front view of an element rebar positioning ring.

FIG. 11 is a perspective view of a main part of an element rebar positioning ring.

FIG. 12 is an explanatory diagram of a method for manufacturing a long multi-directional X-shaped reinforcing bar assembly reinforcing bar.

FIG. 13 is an explanatory diagram of a method for manufacturing a long multidirectional X-shaped reinforcing bar assembly reinforcing bar.

FIG. 14 is a schematic end view of a long multi-directional X-shaped reinforcing bar assembly reinforcing bar showing a positional relationship between element reinforcing bar positioning rings on both sides and both ends of the element reinforcing bar.

FIG. 15 is a schematic side view for explaining a method for manufacturing a double reinforced cage.

FIG. 16 is a schematic side view for explaining a method for manufacturing a double reinforced cage.

FIG. 17 is a schematic side view for explaining an operation of separating and collecting the ring support device and the element reinforcing member positioning ring from the double reinforcing bar cage.

FIG. 18 is a front view of a main portion for describing a method of manufacturing a double reinforced cage.

FIG. 19 is an explanatory diagram of a method for manufacturing a double-bar cage.

FIG. 20 is an explanatory diagram of a method for manufacturing a double-bar cage.

FIG. 21 is a schematic end view of a double steel cage.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rotating shaft, 2 ... Parallel link, 3 ... Support rod, 11 ... Elemental rebar, 12 ... 1st-4th ring support apparatus, 13 ... Elemental rebar fixing ring, 14 ... Elemental rebar positioning ring, 15
... Element reinforcing bar central fixing frame, 15a ... Ring, 15b ... Rebar supporting arm, 36 ... Parallel reinforcing fixing ring, B ... Long multi-direction X
Katachihaisuji assembly rebar, B ₂ ... double rebar cage.

Claims (2)

[Claims] 1. A substantially horizontal rotation shaft configured to be switchable between a state of supporting both ends and a state of cantilever support, and a plurality of parallel links disposed around the rotation shaft at equal intervals and connected to the rotation shaft. Using a rebar cage knitting machine having a plurality of supporting rods supported in parallel with each other and configured to be switchable between an expanded state and a contracted state by swinging the parallel link with respect to the rotation axis. A method for manufacturing a long multi-directional X-shaped reinforcing bar assembly reinforcing bar, comprising a plurality of reinforcing bar positioning pieces projecting from an outer peripheral surface of an element reinforcing fixing ring and a ring having an outer diameter equal to or slightly smaller than that of the element reinforcing fixing ring. A first ring support device for detachably supporting the provided element rebar positioning ring in close proximity to each other, a second ring support device for detachably supporting only the element rebar fixing ring, and a ring and its outer periphery Rebar central fixing frame composed of a plurality of rebar supporting arms radially projecting from, a third ring support device for detachably supporting only the element rebar fixing ring, an element rebar fixing ring, and an outer diameter of A fourth ring supporting device for detachably supporting an element rebar positioning ring formed by projecting a large number of rebar positioning pieces on the outer peripheral surface of the same or slightly smaller ring as the element rebar fixing ring so as to be close to and detachable from each other; By fitting the support rod in the contracted state from one end thereof in this order, and switching the support rod to the expanded state, the first and second ring support devices and the third and third rings are positioned at predetermined positions on both ends of the support rod. 4 and the element reinforcing bar center fixing frame is fixed at a predetermined position in the center of the supporting rod, and is fixed to the element reinforcing bar center fixing frame and slidable in the axial direction with respect to the supporting rod. The supporting device and the fixing frame are rotated integrally with the rotating shaft by fixing them via anti-slip metal fittings, and the oblique streaks whose both ends are parallel to each other and whose central portion is inclined at a predetermined angle with respect to both ends. In a state where both ends of the required number of element rebars bent to be in a state where they are positioned by the rebar positioning pieces of the element rebar positioning ring are fixed to the outer surface of the element rebar fixing ring at predetermined intervals in the rotation direction, And, after assembling the inner rebar group by fixing the oblique streaks of the element rebar to one side of each rebar support arm of the element rebar central fixing frame, the oblique direction of the oblique streaks is provided on the outer surface of the element rebar fixing ring. The oblique streaks intersect the corresponding oblique streaks of the inner reinforcing bar group in an X-shape with both ends of the same number of element rebars being reversed by the rebar positioning pieces of the element rebar positioning ring. And the oblique streaks of the element rebar are fixed to the one side of each rebar supporting arm of the element rebar central fixing frame to assemble the outer rebar group, and the inner rebar group and the outer rebar group lengthen the outer rebar group. A method for producing a long multi-directional X-shaped reinforcing bar assembly reinforcing bar, comprising: 2. A plurality of rings for attaching parallel reinforcing bars having a diameter larger than that of the elongated multidirectional X-shaped reinforcing bar assembly around the elongated multidirectional X-shaped reinforcing bar assembly reinforcing bar manufactured by the method of claim 1. A plurality of spacers are welded to the element reinforcing bar fixing ring at appropriate intervals, and a plurality of spacers corresponding to the interval formed between the outer peripheral surface of the element reinforcing bar fixing ring and the inner peripheral surface of the parallel reinforcing bar mounting ring are welded. A parallel reinforcing bar mounting ring is welded to the outer periphery of the spacer group, and a supporting reinforcing bar is welded to the remaining parallel reinforcing bar mounting ring in a cross-girder shape, and the parallel reinforcing bar mounting ring is elongated to the support rod. The multi-directional X-shaped reinforcing bar assembly is supported concentrically with the reinforcing bar, and thereafter, a plurality of parallel reinforcing bar reinforcing bars are welded over the outer peripheral surface of all the parallel reinforcing bar mounting rings. Wrap the hoop around and fix,
The elongated multi-directional X-shaped reinforcing bar assembly according to claim 1, wherein a double-reinforcing reinforcing bar comprising an external reinforcing bar arranged in parallel and a long multi-directional X-shaped reinforcing bar assembly is manufactured. A method for manufacturing a double-reinforcing cage using the same.