JP6202406B2 - Method for producing reinforced steel bars for reinforced concrete - Google Patents

Description

  The present invention relates to a method for producing reinforced iron for reinforced concrete.

  In order to produce metallic stirrups, generally reinforced iron (rebars) for reinforced concrete, automatic machines called rebar bending devices are used. This reinforcing bar bending apparatus is configured to pull out a metal wire (rebar) in order to obtain a reinforced reinforcing bar, to cut a part of the metal wire to form a reinforced reinforcing bar, and to bend the metal wire into a desired shape. And a folding head.

The machine tool which comprises this reinforcing bar bending apparatus is arrange | positioned in order along the supply axis | shaft of a reinforcing bar. Such a machine tool is arranged close to the work line axis in the conventional embodiment. In this way, during the bending step, the rebar comes into contact with a part of the machine tool protruding from the work surface, for example, with the drawing device and the housing of the cutting device, so that the rebar is partially raised from the ideal forming surface. End up. As a result, the reinforcing bars under processing are subjected to undesirable stress, and as a result, the obtained reinforcing bars tend to crack. Even in an application where a plurality of reinforcing bars are formed on the same surface, the above defects are not improved so much.
Such defects are susceptible to undesired stresses when forming large reinforcing bars, for example when generating U-shaped reinforcing bars, resulting in a large bending radius of the reinforcing bars during the folding step. .

European Patent No. 379043 Patent No. 1242690 specification European Patent No. 0865842

  In the reinforcing bar bending apparatus, the drawing auxiliary means is disposed on the downstream side of the bending head along the reinforcing bar supply direction, and a part of the reinforcing bar is processed to form one reinforcing bar after cutting. For this, see US Pat. Such a reinforcing bar bending apparatus forms bent portions at both ends of the reinforcing reinforcing bar.

  Also in Patent Document 2, in order to move the reinforcing bar on the bending head, the above-described extraction assisting means is disposed so as to be movable between a storage position, a work position at the work surface level, and a position further protruding from the work surface. A rebar bending apparatus is disclosed.

  However, any of the above solutions does not solve the problem that occurs when reinforcing bars are formed on the same plane, particularly when large reinforcing bars are formed on the same plane.

  The object of the present invention is to solve the aforementioned problems. According to the present invention, it is possible to provide a method for optimally manufacturing a reinforced reinforcing bar for reinforced concrete, particularly a method for manufacturing a reinforced reinforcing bar in which the reinforcing bar is bent in the same plane.

  The object of the present invention is to provide a method for producing reinforced reinforcing bars for reinforced concrete, in particular large reinforced reinforcing bars.

  Another object of the present invention is to realize a method of manufacturing a reinforced steel bar with a simple structure and a reliable operation, function and cheap device.

  According to the present invention, the above function is obtained by the method for producing a reinforced reinforcing bar for reinforced concrete according to claim 1.

  According to the present invention, in order to form a reinforced reinforcing bar for reinforced concrete, the reinforcing bar is cut at a predetermined length, and the cutting portion of the reinforcing bar is moved to a position away from the work surface. One or a plurality of folding steps are performed on a part of. However, during these steps, the rebar does not interfere (contact) with the part of the device protruding from the work surface.

  The cutting portion of the reinforcing bar is moved by moving the bending head and the auxiliary stretching means to a position protruding from the reinforcing bar. The auxiliary stretching means is disposed on the downstream side of the bending head. Thereby, it can engage with the same part of a reinforcing bar.

  In the manual method of the present invention, the auxiliary stretching means is driven to move the cut portion of the reinforcing bar by a predetermined distance in the direction opposite to the supply direction, and the bent portion is bent at least once by the bending head.

  In particular, the method of the present invention repeats the step of driving the auxiliary stretching means to shift the tip portion of the reinforcing bar in the direction opposite to the supply direction, and the folding head performs the same number of times as the bending portion performed on the cutting portion of the reinforcing bar. Just bend and get reinforced bars.

The perspective view of the bending area | region of the reinforcing bar bending apparatus which manufactures the reinforcing steel bar for reinforced concrete. The perspective view of the bending area | region of the reinforcing bar bending apparatus in the continuous operation | movement step of the method of one Example of this invention. The perspective view of the bending area | region of the reinforcing bar bending apparatus in the continuous operation | movement step of the method of one Example of this invention. The perspective view of the bending area | region of the reinforcing bar bending apparatus in the continuous operation | movement step of the method of one Example of this invention. The perspective view of the bending area | region of the reinforcing bar bending apparatus in the continuous operation | movement step of the method of one Example of this invention. The perspective view of the bending area | region of the reinforcing bar bending apparatus in the continuous operation | movement step of the method of one Example of this invention. The perspective view of the bending area | region of the reinforcing bar bending apparatus in the continuous operation | movement step of the method of one Example of this invention. The perspective view of the bending area | region of the reinforcing bar bending apparatus in the continuous operation | movement step of the method of one Example of this invention. The perspective view of the bending area | region of the reinforcing bar bending apparatus in the continuous operation | movement step of the method of one Example of this invention. The perspective view of the bending area | region of the reinforcing bar bending apparatus in the continuous operation | movement step of the method of the other Example of this invention. The perspective view of the bending area | region of the reinforcing bar bending apparatus in the continuous operation | movement step of the method of the other Example of this invention. The perspective view of the bending area | region of the reinforcing bar bending apparatus in the continuous operation | movement step of the method of the other Example of this invention. The perspective view of the bending area | region of the reinforcing bar bending apparatus in the continuous operation | movement step of the method of the other Example of this invention. The perspective view of the bending area | region of the reinforcing bar bending apparatus in the continuous operation | movement step of the method of the other Example of this invention. FIG. 5 is a perspective view of a bending region of a reinforcing bar bending apparatus in successive operation steps of a method according to a further embodiment of the present invention. FIG. 5 is a perspective view of a bending region of a reinforcing bar bending apparatus in successive operation steps of a method according to a further embodiment of the present invention. FIG. 5 is a perspective view of a bending region of a reinforcing bar bending apparatus in successive operation steps of a method according to a further embodiment of the present invention. FIG. 5 is a perspective view of a bending region of a reinforcing bar bending apparatus in successive operation steps of a method according to a further embodiment of the present invention. FIG. 5 is a perspective view of a bending region of a reinforcing bar bending apparatus in successive operation steps of a method according to a further embodiment of the present invention.

  In FIG. 1-9, the bending area | region of the apparatus which bends the reinforcing bar 2 is shown with the reference number 1. FIG. The reinforcing bar bending apparatus includes a bending head 3. The bending head 3 is movable between an open position (FIG. 1) stored and separated under the work surface 10 and a work position (FIG. 2) protruding from the work surface 10. The bending head 3 includes a bending pin 4. The bending pin 4 stands upright on the work surface 10 and is mounted so as to rotate about the rotation axis of the folding head 3 instead of being coaxial with the rotation axis of the bending head 3. The bending head 3 further comprises a mandrel 5. The mandrel 5 is composed of a set of half-moon shaped bodies 5a and 5b. These half-moon shaped bodies 5a and 5b define the channel 6 in the longitudinal axis direction of the reinforcing bar 2 supply direction. The half-moon shaped bodies 5a and 5b can take shapes other than those described above in order to bend from both sides. The half-moon shaped bodies 5a and 5b are different from each other.

  The rebar 2 is supplied along the direction of arrow A to the bending head 3 via a rebar extension means (not shown). Such a stretching means is accommodated in the protective housing 11. The protective housing 11 protrudes from the work surface 10 and is disposed on the upstream side of the bending head 3.

  Auxiliary stretching means 7 is provided on the downstream side of the bending head 3 along the supply direction A of the reinforcing bars 2. The auxiliary stretching means 7 is aligned with the stretching means on the upstream side of the bending head 3. The auxiliary extending means 7 moves between an open position below the work surface 10, a first work position at the level of the work surface 10, and a second work position that further protrudes from the work surface 10. The auxiliary stretching means 7 is composed of a set of pulling rotary wheels 8 that rotate in the opposite direction. As will be described below, the rebar 2 moves on the work surface 10 by engaging the auxiliary extension means 7 at the first work position. When the auxiliary stretching means 7 is shifted to the second work position, the reinforcing bar 2 is separated from the work surface 10.

  A cutting means 9 for cutting the rebar 2 is arranged on the upstream side of the bending head 3 and adjacent thereto. One example is a cutting device composed of fixed and movable blades.

  Next, a method for manufacturing a reinforced reinforcing bar for reinforced concrete will be described.

  As shown in FIG. 1, the bending head 3 and the auxiliary extending means 7 are disposed in a disengaged (released) position stored under the work surface 10 at the start of each cycle for manufacturing reinforcing steel bars. Alternatively, it is arranged at a position where it does not interfere (contact) with the reinforcing bar during the supplying step. Thereby, the reinforcing bar 2 is bent on the work surface 10 along the supply direction, but this is performed without contacting the bending head 3 and the auxiliary stretching means 7. The reinforcing bar 2 is pulled in by a predetermined length and protrudes from the auxiliary stretching means 7.

  As shown in FIG. 2, the auxiliary extension means 7 then moves to the first work position at the same level as the work surface 10, and before the pulling rotary wheel 8 sandwiches the rebar 2, Engage with some. Thereafter, a part of the reinforcing bar 2 is cut to form one reinforcing rod.

  As shown in FIG. 3, thereafter, the auxiliary stretching means 7 moves to the second work position protruding from the work surface 10, and separates the cut portion of the reinforcing bar 2 from the work surface 10. At the same time, the bending head 3 is moved (floated) to a work position protruding from the work surface 10. At that time, it engages with the reinforcing bar 2. In particular, the cut portion of the reinforcing bar 2 intersects the channel 6 between the half-moon-shaped bodies 5a and 5b of the bending head 3 (passes through the channel) and enters between the pair of pulling rotating wheels 8 of the auxiliary auxiliary stretching means 7 across the cross. .

  As shown in FIG. 4, in this state, the auxiliary stretching means 7 is driven to move the cut portion of the reinforcing bar 2 in a direction opposite to the arrow A by a predetermined length. In this moving step, the cut portion of the reinforcing bar 2 is arranged at a predetermined distance from the work surface 10. The predetermined distance is a distance at which the cut portion of the reinforcing bar 2 does not interfere with a part of the apparatus protruding from the work surface 10, particularly, a distance at which it does not interfere with the protective housing 11 of the extending means on the upstream side of the bending head 3.

  The step of bending the cut portion of the reinforcing bar 2 is continuously performed by the bending head 3, whereby the reinforcing reinforcing bar 20 is bent into a desired shape, for example, in a U shape.

  As shown in FIG. 5, the first bending (perpendicular) of the cut portion of the reinforcing bar 2 is performed. As shown in FIG. 6, the bending pin 4 is then returned to the start position, and the cut portion of the reinforcing bar 2 is further returned by a predetermined distance in the direction opposite to the arrow A by the auxiliary stretching means 7. As shown in FIG. 7, the reinforcing bar 2 is further bent to obtain the reinforcing bar 20.

  As shown in FIG. 8, at the same time, in the appropriate operation step of the bending head 3, the auxiliary stretching means 7 is moved to the disengaged position away from the work surface 10 (this protrudes from the work surface 10 and grips the rebar 2). Avoiding interference with the housing of the auxiliary extension means 7 in position), further folding operation is performed. This operation may be performed at any time before the reinforcing bar comes into contact with the processing apparatus protruding from the work surface 10. In the above case, the 90 ° C. folding step is executed twice, but similarly, the 180 ° C. folding step may be executed once.

  In the bending step, the channel 6 between the half-moon-shaped bodies 5a, 5b of the bending head 3 is a contrasting member that sandwiches the reinforcing bar 2 disposed along the supply axis on the downstream side of the operating region of the bending pin 4. Function as.

  As shown in FIG. 9, the bending pin 4 and the bending head 3 are moved to a non-engagement (retraction) position, and the obtained reinforcing steel bar 20 is removed.

  10-14, the mandrel of the bending head 3 is constituted by a cylindrical pin 12 arranged on the rotation axis of the bending pin 4. This step of manufacturing reinforced steel will be described again.

  As shown in FIG. 10, when the first bending is performed around the cylindrical pin 12, the progressing portion of the reinforcing bar 2 is moved in the direction opposite to the arrow A as shown in FIG. Then, the reinforcing bars are placed again and the second bending is performed. Before the advanced part hits the housing of the auxiliary extension means 7, the auxiliary extension means 7 is opened and only the upper part of the auxiliary extension means 7 is stored under the work surface 10. Thus, interference with the progress part is avoided. As shown in FIG. 12, the lower portion of the auxiliary stretching means 7 continues to perform the functions necessary to bend the rebar during the folding step. As shown in FIG. 13, when the second bending is completed, the bending head 3 is moved to the non-engagement position as shown in FIG. 14, and the formed reinforcing steel bar 20 is taken out.

  15-19, a bending member is disposed between the bending head 3 and the auxiliary stretching means 7. In the case shown here, the pair of pair arrangement members 13 and 14 are arranged to be movable independently of each other. While the first bending is being performed, the first pair placement member 13 takes a work position protruding from the work surface 10 and engages the rebar 2 along the supply shaft (FIG. 15). The pair arrangement member 13 stays in the working position or is stored in the non-engagement position when a problem occurs in the handling of the reinforcing bars 2 (FIG. 16). When the first pair arrangement member 13 protrudes from the work surface 10 again and moves to the work position to execute bending of the reinforcing bar, the same reinforcing bar hits the housing of the auxiliary extension means 7 (FIG. 17). In such a folding step, the auxiliary stretching means 7 moves (stores) to a non-engagement position, that is, a position where it does not interfere with the reinforcing bar 2 and completes the same folding step (FIG. 18). The bending pin 4, the bending head 3, and the pair arrangement member 13 are then moved to the non-engagement position and release the reinforcing steel bars (FIG. 19).

  The second pair arrangement member 14 is arranged in the direction opposite to the first pair arrangement member 13 with respect to the supply axis of the reinforcing bar 2, but is bent in the direction opposite to the case of the first pair arrangement member 13. Driven by.

  The method of carrying out the production of reinforced steel for reinforced concrete can also be performed manually.

  The feature of the manual manufacturing method is that the reinforcing steel bars can be manufactured in almost the same plane.

  Such a bending effect of the reinforcing bar is obtained by the present invention in which a bending step is performed on a part of the reinforcing bar. Such a bending method of the present invention is performed by the cutting step and the auxiliary extending means 7 disposed on the downstream side of the bending head, whereby the rebar 2 is bent with respect to the apparatus protruding from the work surface 10. Can be done without interfering with some. In particular, this can be done without hitting the housing of the stretching means arranged upstream and downstream of the bending head. For this reason, the reinforcing bars during the bending step are not subjected to undesired stresses, and the resulting reinforcing bars can ensure the necessary coplanarity.

  An apparatus for manually carrying out the present invention can be implemented on the apparatus with various modifications.

  In particular, the manual method of the present invention can also be used with the apparatus of the present invention. The working member is arranged on two working shafts. This is as described in Patent Document 3. In this case, it is not necessary to arrange the bent reinforcing bars at positions away from the work surface.

  The materials and geometries used in the embodiments of the present invention vary as needed.

  The above description relates to one embodiment of the present invention, and those skilled in the art can consider various modifications of the present invention, all of which are included in the technical scope of the present invention. The The numbers in parentheses described after the constituent elements of the claims correspond to the part numbers in the drawings, are attached for easy understanding of the invention, and are used for limiting the invention. Must not. In addition, the part numbers in the description and the claims are not necessarily the same even with the same number. This is for the reason described above. With respect to the term “or”, for example, “A or B” includes selecting “both A and B” as well as “A only” and “B only”. Unless stated otherwise, the number of devices or means may be singular or plural.

DESCRIPTION OF SYMBOLS 1 Rebar bending apparatus 2 Reinforcing bar 3 Bending head 4 Bending pin 5 Mandrel 5a, 5b Half-moon shaped body 6 Channel 7 Auxiliary extending means 8 Pulling wheel 9 Cutting means 10 Working surface 11 Protective housing 12 Cylindrical pins 13, 14 Contact means)
20 Reinforcing bars

Claims (4)

In a method of manufacturing a reinforcing steel bar for reinforced concrete,
The method is executed by a reinforcing bar (2) bending device, and the reinforcing bar (2) bending device includes a bending head (3) for bending the reinforcing bar (2) and the advancing direction (A) of the reinforcing bar (2). Auxiliary stretching means (7) disposed downstream of the bending head (3), and cutting means (9) disposed upstream of the bending head (3),
The bending head (3) is movable between a non-engaging position that does not interfere with the reinforcing bar (2) and a working position protruding from the work surface (10), and includes one folding pin (4) and two mandrels. (5), the mandrel (5) is composed of a pair of half-moon shaped bodies (5a, 5b),
The auxiliary extension means (7) moves between a non-engagement position, a first work position at the level of the work surface (10), and a second work position protruding from the work surface (10),
The method
(A) preliminarily placing the bending head (3) and the auxiliary extension means (7) at the disengaged position;
(B) advancing the reinforcing bar (2) by a predetermined length until it exceeds the auxiliary stretching means (7) arranged at the non-engagement position;
(C) moving the auxiliary extension means (7) to the first working position to engage the reinforcing bar (2);
(D) cutting the rebar (2);
(E) In order to separate the cut piece of the reinforcing bar (2) generated in the step (d) from the work surface (10), the bending head (3) and the auxiliary stretching means (7) are connected to the work surface ( Moving to the working position protruding from 10);
(F) driving the auxiliary stretching means (7) to return the cut piece of the reinforcing bar (2) to the bending head (3) by a predetermined distance in a direction opposite to the traveling direction (A); ,
(G) bending the cut piece of the reinforcing bar (2) at least once by the bending head (3) to generate a reinforcing reinforcing bar (20);
(H) In an appropriate step related to the step (g), in order to bend the reinforcing bar (2) on the upstream side of the bending head (3), the auxiliary stretching means (7) is connected to the reinforcing bar (2). Moving to a non-engaging position that does not interfere, and completing step (g);
(I) The bending head (3) is moved to the disengaged position, and the reinforcing reinforcing bar (20)
A method for manufacturing a reinforced steel bar for reinforced concrete, comprising: The step (g) includes:
(G1) performing a first bend on the cut piece of the reinforcing bar (2) by the bending head (3);
(G2) driving the auxiliary stretching means (7) to further move the rebar cutting piece (2) in a direction opposite to the supply direction (A);
(G3) The method according to claim 1, further comprising the step of further bending the cut pieces of the reinforcing bars (2) by the bending head (3). In the step (g),
(G2) driving the auxiliary stretching means (7) to further move the cut piece of the reinforcing bar (2) in the direction opposite to the supply direction (A);
(G3) The step of bending the cut piece of the reinforcing bar (2) by the bending head (3), and further performing the same number of times as the number of times of bending of the reinforcing bar (2) for strengthening. 3. Method according to claim 2, characterized in that a reinforcing bar (20) is obtained.   The disengagement position of the auxiliary extension means (7) is a position below the work surface (10) of the rebar (2) bending device, according to any one of claims 1-3. The method described in 1.

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