JP2002121895A - Steel bar binding device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide automation and labor saving in steel bar binding work for concrete pavement using steel bars. SOLUTION: A pair of mobile traveling devices, support beams coupled to the traveling devices and a plurality of binders held by the support beams are provided; the support beams can be arranged diagonally relative to the traveling direction by shifting mutual relative positions of a pair of traveling devices, and the binder is able to bind a longitudinal bar to a lateral bar by its up-down motion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for binding reinforcing bars, and more particularly to an apparatus and a method suitable for binding reinforcing bars on site at the time of building a road such as an expressway.

[0002]

2. Description of the Related Art The following conventional techniques are known as techniques for using reinforcing bars in concrete pavement, depending on the purpose of use. Ordinary concrete pavements are provided with horizontal joints at intervals of 8 to 10 m in the direction of extension of the road, and each concrete slab is connected by slip bars or tie bars at joints. Rigid and durable compared to asphalt pavement,
Once cracks occur in the concrete slab, they do not self-heal, so it is common to lay a steel net for the purpose of suppressing the progress of cracks. The steel net is placed at the upper third of the concrete slab, but the deformed steel bar (D
6. Similarly, a deformed steel bar having a diameter of X mm is referred to as DX) having a mass of about 3 kg / m ² , which is also referred to as a welded wire mesh. In addition, since reinforcement of rigidity cannot be expected in a steel net, it is common to bind D13 to a steel net at the vertical edge portion of the concrete slab for the purpose of reinforcement, thereby forming an edge reinforcing bar.

Further, in a place where an abutment or a box culvert is located, it is necessary to strengthen the structure of the concrete slab to increase the rigidity in order to cope with uneven settlement on the back surface. In such a portion, the lattice-shaped D13 is laid on the lower side and the upper side of the plate, or the lattice-like D13 and D16 iron nets are laid on each other. These are called reinforced concrete slabs.

[0004] Next, pavement called continuous reinforced concrete pavement is different from ordinary concrete pavement in that side joints of the concrete slab are omitted. The lateral cracks in the concrete slab that result from this are dispersed by longitudinal reinforcement. Since there are no side seams, vibration and noise during running of the vehicle are eliminated, and riding comfort is improved. In addition, since the vertical reinforcing bars and the horizontal reinforcing bars are assembled in a lattice, the structure can be strengthened and the plate thickness can be reduced. D16 and D13 are used for the vertical reinforcing bars, and D13 and D10 are used for the horizontal reinforcing bars. Table 1 shows typical examples of the plate thickness of a normal concrete slab, Table 2 shows typical examples of the plate thickness of a continuous reinforced concrete slab, and Table 3 shows typical examples of the reinforcing bar diameter and the rebar spacing of the continuous reinforced concrete slab.

[0005]

[Table 1]

[0006]

[Table 2]

[0007]

[Table 3]

[0008] Fig. 1 (A and B) shows a typical example of the reinforcement arrangement of the continuous reinforced concrete slab, and Fig. 2 shows a typical example of the embedding position.
Shown in The reason why the horizontal reinforcing bars are arranged obliquely is to prevent the position of the horizontal crack from overlapping with the position of the reinforcing bars.

[0009] In assembling the rebar, the iron mesh (weld metal mesh) has a small mass and generally uses an off-the-shelf product, so that there is no particular problem in construction. Further, for reinforcing the reinforcing bar at a specific location, a reinforcing bar which has been welded in a lattice shape in advance may be brought in, or a reinforcing bar may be arranged in a lattice shape and bound on site. Generally, since the construction is spot-like, the binding of the reinforcing steel is performed manually. On the other hand, in the case of continuous reinforced concrete pavement, it is essential to lay the reinforcing bars. Further, since the vertical reinforcing bars are laid at a pitch of 8 to 10 cm and the horizontal reinforcing bars are laid at a pitch of 30 to 60 cm, the number of binding portions of the reinforcing bars becomes extremely large. For example, in the case of a 12.5 cm vertical reinforcing bar pitch and a 60 cm horizontal reinforcing bar pitch, when the width is 8 m, 62 vertical reinforcing bars and 16.7 horizontal reinforcing bars are required for an extension of 10 m, and the binding location is 1,035. There are four places (20,708 places if the day construction extension is 200 m). Until now, this huge number of unity has been done by human naval tactics, but it is not only labor intensive but also a problem that the work itself is a laborious work with bending the hips. For this reason, in the case of continuous reinforced concrete pavement, a method has been proposed in which rebars are welded in a grid shape in advance and the reinforced iron mesh is carried in, but this is not preferred because of the high material cost.

[0010] In civil engineering work or building work where work can be performed at one place, a method has been proposed in which a reinforced steel net is assembled in a construction site or the like, and is moved to a construction position as a member. Recently, a method of automatically arranging and tying rebar has been considered in order to save labor in this work. However, in the pavement work, since the construction site is inevitably moved, it is difficult to adopt the factory method as described above, and most of the work has conventionally been performed manually. Bundling rebar with human power requires a lot of artificial work, construction costs,
The construction period increased, and it was a difficult work that took a long time in an impossible posture. In addition, there is a method of bringing in a site that has been previously bound at a work factory other than the site, but at the actual site, if there are various obstacles or terrain curved in the horizontal direction, it is difficult to process with a precise shape. difficult. In recent years, the study of mechanization has been promoted. In Japanese Patent Publication No. 7-56123, an automatic arrangement and automatic tying device of reinforcing bars is mounted on a moving bogie, and a reinforcing steel net assembled with this bogie is continuously applied to a construction site. Laying methods have been proposed. However, this method requires a large-scale construction machine, crowds the site, and has little merit in terms of cost.

[0011]

SUMMARY OF THE INVENTION It is an object of the present invention to automatically and stably bond reinforcing bars on site in the construction of a concrete pavement at the time of building a road surface such as a highway, in a labor-saving manner, in a stable, reliable and cost-effective manner. It is an object of the present invention to provide a rebar tying apparatus and method which can be performed at a time.

[0012]

SUMMARY OF THE INVENTION A rebar tying device according to the present invention includes a pair of self-propelled traveling devices, a support beam connected to the traveling device, and a plurality of binding devices held by the support beams. The support beam can be arranged obliquely to the traveling direction by shifting the relative position of the pair of traveling devices, and the binding machine can bind the vertical streak and the horizontal streak by vertical movement. There is provided a reinforcing bar binding device. The reinforcing bar binding method according to the present invention is the above-mentioned device, wherein the supporting beam is telescopic or its mounting position on the traveling device is movable, whereby the relative position of the pair of traveling devices is shifted from each other. In this case, it is preferable that it can be arranged obliquely to the traveling direction. Further, it is preferable that the plurality of binding machines are arranged in a single row or a double row, and are attached to the support beam directly or indirectly via a binding machine support bar. Further, it is preferable that the binding machine is equipped with a cartridge type binding wire and performs a binding operation by pressing. It is preferable that the above-described device has a horizontal streak raising arm held by a support beam.

[0013] In the reinforcing bar binding method of the present invention, a horizontal bar is arranged at a substantially fixed position on a construction base, and then vertical bars are arranged at predetermined intervals on a height adjusting jig having a predetermined height. The above-mentioned device is entered so as to straddle the top, stopped at a predetermined position, and the horizontal streak raising arm of the device raises the horizontal streak to a position where it comes into contact with the vertical streak, and in this state, the device performs binding. This is the method of binding steel bars.

FIG. 3 is a view showing an example of a use state of the apparatus of the present invention, wherein A is a plan view of the apparatus of the present invention, and B is a side view. In the figure, 1 is a binding machine, 2 is a binding machine support bar, 3 is a binding machine elevating cylinder, 4 is a horizontal muscle raising arm, 5 is a rotating shaft, 6 is a traveling device, 7 is a driving source, 8 is a work platform, and 9 is a support. Beam 10 indicates a vertical streak, and 11 indicates a horizontal streak. Traveling device 6
Is composed of a pair of tires or crawler belts that can run by internal or external power.
Are connected. By shifting the relative position of the pair of traveling devices (the right side is located downward in the figure), the support beam 9 is inclined with respect to the traveling direction, preferably in a range of ± 45 to 90 °. Telescopic so that it can be placed (telescopic support beams are shown in the figure)
Or the movable device is mounted at a movable position.

The support beam 9 is provided with a plurality of binding machines 1. A plurality of bundling machines arranged in a single row or double rows are mounted directly or indirectly via the bundling support bar 2, and in the former case, the support beam itself moves up and down, and in the latter case, It is preferable to have a structure capable of binding several places at a time by the vertical movement of the lifting / lowering cylinder 3 connecting the support beam and the support bar. It is preferable that the binding machine support bar 2 has a mechanism that expands and contracts in accordance with the extension and contraction of the telescopic support beam 9 and that the spacing between the binding machines can be arbitrarily adjusted. The binding machine 1 is preferably of a type in which a binding wire of a cartridge type is mounted and pressed to wind the binding wire around a reinforcing bar and twist it up when lifting. In this case, the twisting-up is performed by pressing the cartridge-type special binding wire by the pressing force, the binding wire ends are joined under the crossed rebar, and when lifted, the hook is hooked on the upper part of the binding wire automatically. The rotation is performed 5 to 6 times. FIG. 4 shows an example of this type of binding machine. In the figure, the binding machine 1 has a tip that is preferably expanded to 5 to 10 times the rebar diameter, so that the slide pin 17 can freely turn left and right even if there is some misalignment. Has become.

FIG. 5 shows an example of the horizontal streak raising arm.
The horizontal streak raising arms 4 are provided on the plurality of support beams 9 at predetermined intervals so that the horizontal streaks can be pulled up at a plurality of locations and held for binding work. In FIG. 5, the horizontal muscle raising arm 4 is
Even if the horizontal streak placed on the work board is slightly displaced, if it is at a substantially fixed position where the position can be corrected with a paddle or the like, it is connected to a chain 14 or the like on a stand overhanging from the support beam 9 and a motor 15 etc. , Which can be moved in the forward and backward motion by the user.

The reinforcing bar binding method of the present invention is a method of binding using the above-described apparatus. When the horizontal bar is below the vertical bar,
Place a horizontal streak at a substantially fixed position (angle, pitch) on the construction base,
Next, vertical streaks are arranged at predetermined intervals using a height adjusting jig such as a spacer having a predetermined height. The device of the present invention enters over the device, stops at a predetermined position, and raises the horizontal streak so as to be in contact with the vertical streak by the horizontal streak pulling arm provided in the device, and in this state, ties the device. In addition to installing the vertical streak spacers one by one, it is also possible to use a method in which an iron bar supported by a jig for height adjustment is placed in the horizontal direction, and several vertical streaks are arranged thereon. The horizontal muscle pulling arm
There is a method of directly grasping the reinforcing bar on the ground surface, a method of rolling into a fixed position with a paddle, and then grasping or scooping up.
When the horizontal streak is up, the lifting arm is not necessary, but the paddle is effective.

FIG. 6 shows the flow of the above-mentioned binding work. The height of the vertical streak is fixed in advance by the spacer 13, and the horizontal streak raising arm pulls up the horizontal streak placed on the ground until it comes into contact with the vertical streak. When the binding machine 1 is lowered to the intersection with the horizontal and vertical streaks in contact with each other, and the binding wire cartridge holder is slid, the binding wire winds around the intersection. Next, the twisting mechanism in the center of the binding machine is raised while turning, and the reinforcing bars are bound together. The tip of the binding machine 1 is widened to about 5 to 10 times the width of the reinforcing bar 13 to 20 mm, and it is preferable to keep the supporting upper end of the binding machine free even if the position is slightly misaligned, so that it is almost corrected to the center. Is done.

[0019]

According to the method of the present invention, as described above, a device consisting of a traveling device moving on both sides of the construction and a supporting beam passed between the traveling devices is arranged so as to straddle a pre-arranged reinforcing bar. This is a method in which a binding machine attached to the support beam performs binding in each row of the horizontal reinforcing bars. If necessary, it is possible to use a plurality of rows of tying machines and to simultaneously tie a plurality of rows. Since the traveling device moves on both sides of the construction, it is easy to follow the change even when the road turns, and the site does not become complicated because the entire device does not become large. Further, even when the horizontal reinforcing bars are arranged diagonally, it is possible to easily cope with the case.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a reinforcing bar arrangement of a continuous reinforced concrete slab.

FIG. 2 is a cross-sectional view illustrating a position where a reinforcing bar is embedded in a continuous reinforced concrete slab.

FIG. 3 is a diagram showing an example of a use state of the device of the present invention.

FIG. 4 is a diagram showing an example of a binding machine used in the present invention.

FIG. 5 is a diagram showing an example of a horizontal muscle pulling arm.

FIG. 6 is a diagram showing a flow of a binding operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Binder 2 Binder support bar 3 Binder lifting cylinder 4 Rebar raising arm 5 Revolving axis 6 Traveling device 7 Drive source 8 Work scaffolding 9 Supporting beam 10 Vertical stripe 11 Horizontal stripe 13 Spacer 14 Chain (V belt) 15 Motor 16 Sprocket ( pulley)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takashi Aida 1-19-11 Kyobashi, Chuo-ku, Tokyo Inside Nihonbudo Co., Ltd. (72) Inventor Katsuaki Ito 1-19-11 Kyobashi, Chuo-ku, Tokyo F-term (reference) in Nihon Hodou Co., Ltd. 2D051 AF03 EA06

Claims (6)

[Claims] 1. A traveling device comprising: a pair of self-propelled traveling devices; a support beam connected to the traveling device; and a plurality of binders held by the support beams. A reinforcing bar binding device which can be arranged obliquely with respect to the traveling direction by shifting the relative position of the reinforcing bars, and wherein the binding machine can bind vertical and horizontal streaks by vertical movement. 2. The supporting beam is telescopic or its mounting position on the traveling device is movable, so that when the relative position of the pair of traveling devices is shifted from each other, the supporting beam moves in the traveling direction. 2. The device according to claim 1, wherein the device can be arranged obliquely with respect to the device. 3. The apparatus according to claim 1, wherein the plurality of binding machines are arranged in a single row or double rows, and are attached to the support beam directly or indirectly via a binding machine support bar. 4. The apparatus according to claim 1, wherein said binding machine is equipped with a cartridge type binding wire and performs a binding operation by pressing. 5. The device according to claim 1, further comprising a transverse streak lifting arm held by the support beam. 6. Placing a horizontal streak at a substantially fixed position on a construction base,
Next, a vertical streak is arranged at a predetermined interval on a height adjusting jig of a predetermined height, and then the apparatus according to claim 5 is entered so as to straddle over the jig, and stopped at a predetermined position. A reinforcing bar binding method, characterized in that a horizontal bar is lifted to a position where the horizontal bar is in contact with a vertical bar by a horizontal bar pulling arm of the device, and binding is performed by the device in that state.