JP4097027B2 - Steel wire winding apparatus and steel wire winding method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a steel wire winding apparatus and a steel wire winding method for winding a PC steel wire so as to surround a plurality of main reinforcing bars erected in the vertical direction when a columnar structure such as a column or a pier is constructed. Is.
[0002]
[Prior art]
When constructing columnar structures such as columns and piers, belt reinforcing bars are usually arranged so as to surround the outer periphery of a plurality of main reinforcing bars standing in the vertical direction. In general, the reinforcing bars are arranged by inserting reinforcing bars formed in an elliptical shape, an oval shape, or a rectangular shape according to the outer peripheral shape of the columnar structure from above the main reinforcing bars.
Conventionally, a method of substituting the steel bars with a continuous PC steel wire has been performed. In this construction method, a PC steel wire a lowered from above is spirally wound around the main reinforcing bar d. When performing this winding, a winding device that turns around the main rebar d and automatically performs winding may be used (see FIG. 7, Patent Document 1). In this apparatus, a beam g is passed to the uppermost part of a scaffolding f assembled higher than a columnar structure e, and a drum b in which PC steel wires a are bundled is attached to the beam. The PC steel wire a drawn out from the drum b is lowered downward via the tip of the turning boom c. Then, the PC steel wire a goes around the main rebar d by turning the boom c, and the worker h binds the main rebar d and the PC steel wire a.
[0003]
On the other hand, a plurality of band reinforcing bars may be arranged so that a part of the projected cross section of the band reinforcing bars overlaps. This bar arrangement is called interlocking arrangement, and an example using a circular band reinforcing bar is disclosed in Patent Document 2, and an example in which a spiral band reinforcing bar is superimposed is disclosed in Patent Document 3.
[0004]
[Patent Document 1]
JP-A-10-184209 [Patent Document 2]
JP 2001-193283 A [Patent Document 3]
Japanese Patent Laid-Open No. 2001-248305
[Problems to be solved by the invention]
The above-described conventional steel wire winding apparatus and steel wire winding method have the following problems.
<I> The weight of the drum b around which the PC steel wire is wound is usually 2 to 3 t, and in addition to this, a weight facility such as a driving device for rotating the drum b is installed at the top of the columnar structure e. It will be. For this reason, it is necessary to make supporting equipment such as the scaffolding f and the beam g large-scale equipment, and the construction period and cost increase. In addition to this, there is a method of turning a steel wire winding device around a columnar structure. However, the winding device provided with the traveling device becomes expensive and secures a traveling space and is on a scaffold. When running the vehicle, there is a problem that the scaffolding needs to be a large facility.
<B> In the field of interlocking bar arrangement, there has conventionally been no device for automatically winding a PC steel wire. When using independent circular reinforcing bars, the left and right vertical reinforcing bars are inserted alternately, or a part of the circular reinforcing bars is connected step by step. For this reason, it took time and work efficiency was poor. Moreover, when inserting a helical rebar, it is necessary to lift the helical rebar above the columnar structure, and thus a large crane is often required. In addition, in order to manufacture a spiral band reinforcing bar in advance, there is a limitation in size due to a work yard and a transportation means.
[0006]
OBJECT OF THE INVENTION
The present invention has been made to solve the above-described conventional problems, and a steel wire winding apparatus and a steel wire winding device capable of easily winding a steel wire around a columnar structure with simple equipment. The purpose is to provide an attachment method.
It is another object of the present invention to provide a steel wire winding device and a steel wire winding method capable of dealing with interlocking reinforcing bars in which a part of the projected cross section of the band reinforcing bar overlaps. It is another object of the present invention to provide a steel wire winding device and a steel wire winding method that can reduce the work period and cost by simplifying temporary equipment and realizing continuous construction.
The present invention achieves at least one of these objects.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a steel wire winding apparatus according to the present invention is a steel wire winding apparatus for winding a steel wire around a main reinforcing bar group in the construction of a columnar structure. A steel wire feeder for mounting the steel wire bundle to be used, a retractor for pulling the steel wire upward, a swivel base that swivels around the central axis, and a swivel part of the swivel base, and the direction of the pulled steel wire is changed. And a guide tube. Here, in the above-described steel wire winding apparatus, the steel wire feeder is provided with a horizontal axis oriented in the horizontal direction and a drum axis oriented in a direction perpendicular to the horizontal axis, and the drum axis is a shaft. It is a drum axis | shaft which attaches the said steel wire bundle to the drum which rotates around, Comprising: When sending out a steel wire, it can also comprise so that both the said drum axis | shaft and the said horizontal axis may rotate. Moreover, it consists of an endless track with an oval cross section and a cylindrical guide roller, which are used by sandwiching the steel wires in pairs, and the direction of the rotation path of the endless track and the guide roller is sandwiched It is also possible to use a retractor configured to intersect at the projected section in the axial direction of the steel wire. For example, two sets of guide rollers can be arranged at two positions above and below the endless track so that the rotation axis is orthogonal to the direction of the rotation axis of the endless track in the projection cross section.
[0008]
The steel wire winding method of the present invention is a steel wire winding method using a plurality of the above-described steel wire winding devices, wherein the steel wire feeder is installed on the ground, and the swivel base and The guide tube is installed so that the turning trajectory of the adjacent swivel base overlaps the uppermost part of the columnar structure at the time of winding, and the retractor is disposed in the vicinity of the central axis of the swivel base. Each of the steel wire winding devices is installed and rotated while being controlled so that the swivel portions of adjacent swivel bases do not collide, and the steel wire is wound around the main reinforcing bar of the columnar structure. Is the method. Here, in the above-described winding method of the steel wire, the rotating directions of the adjacent swivel mounts are reversed, the respective swivel mounts are rotated at the same speed, and the guides of the adjacent swivel mounts are made every half rotation. It can be controlled so that the tip of the tube is placed in the opposite position.
[0009]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1
Embodiment 1 of the present invention will be described below with reference to the drawings.
[0010]
<A> Steel wire winding device The steel wire winding device of the present invention includes a steel wire feeder 1 for mounting a steel wire bundle used for winding, a retractor 2 for pulling the steel wire 5 upward, and a center. The pivot frame 3 is configured to pivot around an axis, and the guide tube 4 that is attached to the pivot unit 31 of the pivot frame 3 and converts the direction of the pulled steel wire 5.
The steel wire 5 used in the apparatus of the present invention corresponds to a PC steel wire, a PC steel strand, a flexible rebar, and the like.
Hereinafter, each component will be described.
[0011]
<B> Steel Wire Feeder The steel wire feeder 1 is a device that sends out the steel wire 5 from the steel wire bundle wound around the drum 51 or the like.
The steel wire feeder 1 uses, for example, a gantry composed of a bottom plate and a wall plate, or a skeleton frame constructed so as to be similar thereto. The wall plate is provided with a horizontal shaft 11 that rotates in the horizontal direction (see FIG. 1). A frame 13 for attaching a drum shaft 12 oriented in a direction orthogonal to the horizontal shaft 11 is fixed to the tip of the horizontal shaft 11.
The drum shaft 12 is a rotating shaft for attaching a drum 51 around which a steel wire bundle is wound. The drum 51 attached to the steel wire feeder 1 can be rotated by both the rotation of the drum shaft 12 and the rotation of the horizontal shaft 11. Usually, the steel wire 5 wound into a cylindrical shape is kinked or has a curl. For this reason, the stranded steel wire 5 is supplied only by rotating the drum shaft 12 and feeding the steel wire 5. For this reason, while rotating the drum axis | shaft 12 and rotating the horizontal axis | shaft 11, the steel wire 5 which took the twist and twist of the steel wire 5 and was easy to wind is supplied.
[0012]
<C> Rotating frame The rotating frame 3 is a frame having a rotating part 31. The swivel mount 3 is usually installed on the uppermost part of the main reinforcing bar 61 or the columnar structure 6 to be constructed. However, when the steel wire 5 is wound before the main reinforcing bar 61 of the columnar structure 6 is raised to the end, the swivel base 3 may be installed on the uppermost portion of the columnar structure 6 at the time of winding.
The swivel unit 31 is a member that rotates around the central axis of the swivel base 3. The swivel unit 31 is made of, for example, a bar, and is attached with a weight or the like for balancing on the side opposite to a position where a distal end portion of a guide tube 4 to be described later is attached. The turning part 31 turns by the rotation of the central axis. Since the apparatus for applying the rotational force to the central axis only needs to rotate the steel wire 5 having a length of about the height of the revolving part 31, the guide tube 4 and the columnar structure 6, a lightweight apparatus can be used. .
It is preferable that the rotation direction and the rotation speed of the swivel unit 31 are set and controlled arbitrarily. Further, it can be stopped or temporarily stopped every half rotation.
[0013]
<D> Retractor The retractor 2 is a device that draws the steel wire 5 to above the columnar structure 6.
In the steel wire winding apparatus of the present invention, the steel wire 5 is moved by the force of the retractor 2.
The retractor 2 is fixed, for example, directly below the central axis of the swivel base 3 and feeds the steel wire 5 toward the guide tube 4 described later. It is preferable that the drawing-in (feeding-out) speed of the retractor 2 is linked to the winding speed (the turning speed of the turntable 3).
For the retractor 2a, for example, a device that raises the steel wire 5 by sandwiching the steel wire 5 between the two rubber rollers 21 arranged side by side with a gap and rotating the rubber roller 21 with a motor can be used. Here, it is preferable to form a groove on the circumference of the rubber roller 21 so that the steel wire 5 does not derail. A known retractor such as a center hole jack can also be used.
[0014]
Moreover, the structure of another retractor 2b is shown in FIG. The retractor 2b uses two endless tracks 22 and 22 each having an oval cross section. The endless track 22 is formed by, for example, forming a belt-shaped rubber belt into an annular shape and fitting the rubber belt to a plurality of rotating cylinders 24 arranged at intervals. The steel wire 5 sandwiched between the pair of endless tracks 22 is held by the frictional resistance with the endless track 22 and rises as the endless track 22 rotates. Since the endless track 22 and the steel wire 5 are in contact with each other for a long time due to surface contact, the steel wire 5 is less likely to be twisted when it is raised.
A guide member for guiding the steel wire 5 to the endless track 22 or correcting the twist of the steel wire 5 can be arranged above, below or above and below the endless track 22. As the guide member, for example, a cylindrical guide roller 23 used in a pair can be used. The steel wire 5 sandwiched between the pair of guide rollers 23 has its twist corrected, and can smoothly feed the steel wire 5 toward the endless track 22 or the guide tube 4.
The direction of the rotating shaft of the endless track 22 (the axial direction of the rotating cylinder 24) and the direction of the rotating shaft of the guide roller 23 are combined so as to intersect in the projected section of the sandwiched steel wire 5 in the axial direction. For example, if the direction of the rotation axis of the guide roller 23 and the endless track 22 is orthogonal, the twist of the steel wire 5 in various directions can be corrected.
[0015]
<E> Guide tube The guide tube 4 is a guide member used to change the direction of the steel wire 5 pulled up above the columnar structure 6 downward.
As the guide tube 4, for example, a steel tube bent in a semicircular shape can be used. One end of the guide tube 4 is fixed to the central axis of the swivel base 3, and the other end is fixed near the tip of the swivel unit 31.
In addition, a guide member can be installed in the lower part of the columnar structure 6. For example, when the steel wire feeder 1 is placed on the ground outside the columnar structure 6, it is necessary to change the direction of the steel wire 5 sent out therefrom upward. For this reason, it is composed of a curved part and a straight part, and the direction of the steel wire 5 is set by placing a rising guide pipe 41 such that the orientation of the inserted steel wire 5 changes, for example, 90 degrees at the time of discharging, at the lower part of the columnar structure 6. Change.
[0016]
<F> Steel wire winding method (Fig. 1)
A steel wire bundle or a drum 51 having a steel wire bundle is attached to the steel wire feeder 1. Then, the steel wire 5 is fed out while rotating the horizontal shaft 11 and the drum shaft 12.
The fed steel wire 5 passes through the rising guide pipe 41, rises inside the columnar structure 6, and is sent out to the guide pipe 4 by the retractor 2. The steel wire 5 sent to the guide tube 4 changes direction along the guide tube 4 and is sent out downward. At this time, since the turning part 31 to which the guide pipe 4 is attached is also turning, the position where the steel wire 5 is fed out gradually moves.
Below the columnar structure 6, the worker 7 fixes the lowered steel wire 5 to the main reinforcing bar 61 with binding wires or metal fittings as necessary. It is preferable that the turning speed of the steel wire winding device and the operation / stopping can be performed by the operator 7.
[0017]
Second Embodiment of the Invention
Hereinafter, Embodiment 2 in the case of using a plurality of steel wire winding devices described in Embodiment 1 will be described with reference to the drawings.
[0018]
<A> Interlocking bar arrangement There is a bar arrangement method called interlocking bar arrangement in which a part of a band reinforcing bar having a circular projection cross section is placed on an adjacent band reinforcing bar.
If the steel wire winding apparatus of the present invention is used, the steel wire 5 can be continuously and efficiently wound spirally as described in the first embodiment.
For this reason, the interlocking arrangement | positioning with which the helical steel wire 5 overlaps is performed using the winding apparatus of a some steel wire.
[0019]
<B> Arrangement of Steel Wire Winding Devices Prepare the number of steel wire winding devices to be wound.
Then, a plurality of swivel mounts 3a, 3b, 3c, 3d are arranged so that a part of the swivel trajectory of the swivel mount 3 overlaps (see FIG. 2).
The rotation directions of the adjacent swivel mounts 3a, 3b, 3c, 3d are set to be opposite directions. Referring to FIG. 2 as an example, the swivel base 3a and the swivel base 3b rotate in opposite directions, and the swivel base 3a and the swivel base 3c rotate in the same direction. Further, the rotational speed is controlled so as to be the same even if the directions are different.
At the time when rotation of the swivel mounts 3a, 3b, 3c, 3d is started, for example, the positions of the tips of the guide tubes 4a, 4b, 4c, 4d are shifted by 180 degrees in plan view (see FIG. 2). When the swivel unit 31 of each of the swivel mounts 3a, 3b, 3c, 3d is rotated in this state, the tips of the guide tubes 4a, 4b, 4c, 4d of the adjacent swivel mounts are arranged at opposite positions every half rotation. .
The side view of the Example which has arrange | positioned the winding apparatus of the some steel wire in FIG. 3 is shown.
[0020]
<C> Arrangement state of steel wire FIG. 4 shows a plan view and a side view when the steel wire 5 is wound by the above-described winding method of the steel wire. Here, the Example which wound the steel wire 5 with the winding apparatus of two units | sets of steel wire is shown. 4 is a cross-sectional view taken along the line AB of FIG.
In the side view of FIG. 4 and FIG. 5, the two steel wires 5a and 5b are arranged at equal intervals (same pitch) without crossing each other. Thus, if the winding apparatus of the steel wire of this invention is used, the steel wire 5 can be arrange | positioned at equal intervals also in the duplication part of interlocking reinforcement. That is, it can be said that structurally effective reinforcement can be performed efficiently.
[0021]
【The invention's effect】
Since the steel wire winding apparatus and the steel wire winding method of the present invention are as described above, the following effects can be obtained.
<I> Since a heavy steel wire feeder can be placed on the ground, the apparatus installed above the columnar structure can be reduced in weight. For this reason, temporary facilities can be simplified. Moreover, since it becomes possible to wind a steel wire continuously, a steel wire can be wound easily and it is efficient.
<B> By controlling the rotation of the swivel unit, it is possible to easily cope with interlocking bars. For this reason, conventionally, work requiring a long period of time can be efficiently performed. Moreover, a steel wire can be arrange | positioned at equal intervals also in the duplication part of a steel wire.
[Brief description of the drawings]
FIG. 1 is an explanatory view of an embodiment of a steel wire winding device and a steel wire winding method according to the present invention. FIG. 2 is a plan view of an embodiment in which a plurality of steel wire winding devices are arranged. Side view of an embodiment in which a plurality of steel wire winding devices are arranged. FIG. 4 is a plan view and a side view of interlocking reinforcing bars. FIG. 5 is a cross-sectional view taken along line AB in FIG. FIG. 7 is a perspective view of an embodiment of a retractor combined with a roller. FIG. 7 is an explanatory diagram of an embodiment of a conventional steel wire winding apparatus.
DESCRIPTION OF SYMBOLS 1 ... Steel wire feeder 11 ... Horizontal shaft 12 ... Drum shaft 2 ... Retractor 22 ... Endless track 23 ... Guide roller 3 ... Swing stand 31 ... Swing part 4 ... Guide Pipe 5 ... Steel wire 6 ... Columnar structure 61 ... Main rebar

Claims (5)

In the steel wire winding device for winding the steel wire around the main reinforcing bar group when constructing the columnar structure,
A steel wire feeder for mounting a steel wire bundle used for winding;
A retractor that pulls the steel wire upward;
A swivel base that swivels around a central axis;
A steel wire winding device comprising: a guide tube that is attached to a revolving portion of the revolving frame and converts a direction of the pulled steel wire. In the steel wire winding apparatus according to claim 1,
The steel wire feeder is provided with a horizontal axis oriented in the horizontal direction and a drum axis oriented in a direction perpendicular to the horizontal axis,
The drum shaft is a drum shaft that attaches the steel wire bundle to a drum that rotates around the shaft, and both the drum shaft and the horizontal shaft rotate when the steel wire is sent out.
Steel wire winding device. In the steel wire winding apparatus according to claim 1 or 2,
The retractor is composed of an endless track with an oval cross section and a cylindrical guide roller that are used in pairs with the steel wire in between, and a cylindrical guide roller,
The direction of the endless track and the rotation axis of the guide roller intersect with each other in a projected section in the axial direction of the sandwiched steel wire,
Steel wire winding device. A steel wire winding method using a plurality of steel wire winding devices according to any one of claims 1 to 3,
The steel wire feeder is installed on the ground, and the swivel base and the guide tube are installed so that the swivel tracks of the swivel base adjacent to the uppermost part of the columnar structure at the time of winding overlap, and the swivel The steel wire winding device is installed by arranging the retractor in the vicinity of the center axis of the gantry,
It is characterized by winding a steel wire around the main rebar of a columnar structure, rotating while controlling so that the swivel part of the adjacent swivel base does not collide,
Steel wire winding method. In the winding method of the steel wire according to claim 4,
Rotate each swivel base at the same speed so that the direction of rotation of the adjacent swivel bases is opposite, so that the tip of the guide tube of the adjacent swivel base is placed at the opposite position every half rotation. It is characterized by being controlled,
Steel wire winding method.

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