JP6661138B1 - Unit reinforcing bar and method of manufacturing unit reinforcing bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a unit reinforcing bar which can be simply manufactured without causing thermal deterioration in a necessary portion of a structural reinforcing bar. A unit reinforcing bar in which a plurality of structural reinforcing bars arranged in parallel with each other and a fixed reinforcing bar orthogonal to the structural reinforcing bars are integrated, and the structural reinforcing bars include a necessary part and a heat radiating part. And the fixed rebar is welded near the tip of the heat dissipation portion. [Selection] Fig. 1B

Description

  The present invention relates to a unit reinforcing bar and a method of manufacturing the unit reinforcing bar.

  Conventionally, when the rebar is processed by welding, the fatigue strength (toughness) decreases due to thermal degradation. Therefore, welding of structural rebar has been restricted or prohibited. When using welded rebar for structures Individual grades need to be obtained. On the other hand, a welding method that performs a special process has been proposed so that the strength falls within the standard range when performing welding, and after performing the main welding by spot welding, tempering with a weaker current than the main welding. There are known ones for obtaining strength (see Patent Documents 1 and 2).

Japanese Patent No. 3658337 Japanese Patent No. 4454575

  However, it is inefficient to perform two spot weldings of the main welding and the tempering on the same location of the rebar, and furthermore, the manufacturing process becomes complicated because the welding specifications such as tempering conditions are specified in detail. There was a problem.

  Therefore, the present invention solves the problems of the prior art as described above, that is, the object of the present invention is to make it possible to easily manufacture a necessary part of a structural reinforcing bar without causing thermal deterioration. Is to provide unit rebar.

The invention according to the present claim 1 is a unit rebar cross a plurality of structural reinforcing bars disposed in parallel to, the fixed reinforcing bar perpendicular to the structural reinforcement are integrated by spot welding, the structural reinforcement However, it is necessary to extend in the longitudinal direction of the structural reinforcing bar and have a strength within a specified range, and to extend from the required portion and be formed in a linear shape to dissipate heat generated by spot welding and to determine the required portion. consists to the required portion and the heat radiating portion to maintain the temperature below a boundary display that indicates the boundary line between the heat radiating portion, challenges the fixed reinforcing bar, by being welded to the vicinity of the tip portion of the heat radiating portion, the above-described Is to solve.

  The invention according to claim 2 further solves the above-mentioned problem by arranging the heat radiating portion in a plane where the plurality of necessary portions are arranged.

The invention according to claim 3 solves the above-mentioned problem by the heat radiating portion being extended from the necessary portion and integrally formed in a line .

  The invention according to claim 4 further solves the above-mentioned problem by the heat radiating portion being bent in a J-shape.

  The invention according to claim 5 further solves the above-mentioned problem by being configured so that the heat radiating portion is orthogonal to the necessary portion.

The invention according to the claims 6, wherein the boundary display unit, by the appearance upon reaching the predetermined temperature is a material that changes, is to further solve the aforementioned problems.

The invention according to claim 7 provides a required portion having a strength within a standard range and a linear portion extending from the required portion to dissipate heat generated by spot welding to reduce the required portion to a predetermined temperature or less. After arranging a plurality of structural rebars, which are composed of a heat radiating portion to be kept and a boundary display portion indicating a boundary line between the necessary portion and the heat radiating portion, in parallel, a plurality of fixed reinforcing bars orthogonal to the plurality of the structural reinforcing bars are formed by the plural heat radiating portions. The above-mentioned problem is further solved by bringing the plurality of structural reinforcing bars and the fixed reinforcing bars into contact with each other by spot welding and bringing them into contact with each other in the vicinity of a tip portion of the structural member.

According to the unit rebar of the present invention according to claim 1, a unit rebar in which a plurality of structural rebars arranged in parallel with each other and a fixed rebar orthogonal to the structural rebar are integrated by spot welding. Structural rebar extends in the longitudinal direction of the structural rebar and has a required portion having a strength within a specified range and a linear portion extending from the required portion to dissipate heat generated by spot welding to determine a required portion. It consists of a heat radiator that keeps the temperature below the temperature and a boundary indicator that shows the boundary between the necessary part and the heat radiator . The fixed rebar is welded near the tip of the heat radiator, so that the heat generated by spot welding is for but dissipated into the air by the heat transfer during the conduct heat radiating portion, while thermal degradation required portion of the structure rebar maintaining the strength of the standard range not occur, one of the spot welding to the same location conveniently only do the It is possible to provide a unit rebar can be granulated.

  According to the unit rebar of the invention according to the second aspect of the present invention, since the heat radiating portion is located in the disposition surface of the plurality of necessary portions, the fixed rebar faces the required portion in a direction approaching the wall surface. Since the protruding dimension is at most the diameter of the fixed reinforcing bar, the influence on the strength of the concrete can be reduced.

According to the unit rebar of the invention according to claim 3, since the heat radiating portion is extended integrally from the necessary portion and is integrally formed in a linear manner, the fixed rebar connects the entire distal end of each structural rebar. Since the amount of protrusion of the structural rebar is small due to welding, safety can be ensured even if the tip of each structural rebar is not covered with a cap.

  According to the unit rebar according to the fourth aspect of the present invention, since the heat radiating portion is bent in a J-shape, the length protruding from the necessary portion is shorter than the length of the heat radiating portion, and the wall upper surface is formed. Since the size of the heat radiating portion protruding further in the direction approaching the width of the concrete is further reduced, the influence on the strength of the concrete can be further reduced.

  According to the unit reinforcing bar of the invention according to claim 5, since the heat radiating portion is configured to be orthogonal to the necessary portion, both the heat radiating portion and the fixed reinforcing bar project in the longitudinal direction of the necessary portion. Therefore, the dimension of the heat radiating portion and the fixed reinforcing bar protruding in the direction approaching the upper surface of the wall is extremely small, and the influence on the strength of the concrete can be extremely reduced.

According to the unit rebar of the invention according to the claims 6, if the boundary display unit appearance reaches the predetermined temperature by comprising a material that changes the boundaries of the boundary display unit becomes a predetermined temperature Is indicated by a change in appearance, so that it is possible to easily confirm that thermal deterioration has not occurred in the necessary parts.

According to the method for manufacturing a unit reinforcing bar of the invention according to claim 7, a necessary portion having a strength within a specified range and a linear portion extending from the necessary portion are formed to dissipate heat generated by spot welding. After arranging in parallel a plurality of structural rebars consisting of a radiator that keeps the part below a predetermined temperature and a boundary display part indicating a boundary between the necessary part and the radiator , a plurality of fixed rebars orthogonal to the plurality of structural rebars are formed. The fixed rebar and multiple structural rebars are welded together by spot welding and integrated into the vicinity of the tip of the radiator, and the generated heat is dissipated into the air by heat transfer while conducting through the radiator. Then, since the necessary parts do not undergo thermal deterioration, the unit rebar can be easily manufactured by performing only one spot welding on the same location .

The schematic diagram which looked at the unit rebar concerning the 1st example of the present invention from the longitudinal direction of the structural rebar. The schematic diagram which looked at the unit rebar concerning the 1st example of the present invention from the direction perpendicular to the longitudinal direction of the structural rebar. The schematic diagram which looked at the unit rebar concerning a 2nd example of the present invention from the longitudinal direction of the structural rebar. The schematic diagram which looked at the unit reinforcing bar which concerns on the 2nd Example of this invention from the direction orthogonal to the longitudinal direction of a structural reinforcing bar. The schematic diagram which looked at the unit rebar concerning a 3rd example of the present invention from the longitudinal direction of the structural rebar. The schematic diagram which looked at the unit rebar concerning a 3rd example of the present invention from the direction perpendicular to the longitudinal direction of the structural rebar. The schematic diagram which looked at the unit rebar concerning the 4th example of the present invention from the longitudinal direction of the fixed rebar. FIG. The schematic diagram which looked at the unit rebar concerning a 5th example of the present invention from the longitudinal direction of a fixed rebar. FIG. The schematic diagram which looked at the unit rebar concerning a 6th example of the present invention from the longitudinal direction of a fixed rebar. FIG.

In the present invention, since heat generated by spot welding is dissipated into the air by heat transfer while conducting through the heat radiating portion, heat deterioration does not occur in necessary portions of the structural rebar and the strength within the standard range is maintained. Any specific embodiment may be used as long as it is a unit rebar that can be easily manufactured by performing only one spot welding on the same location and its manufacturing method.

  That is, as the structural reinforcing bar and the fixed reinforcing bar according to the present invention, round bars and various deformed bars can be used.

The shape of the necessary part of the structural reinforcing bar according to the present invention may be linear, rectangular, U-shaped or another shape. Therefore, shapes such as vertical or horizontal bars at the time of wall construction, stirrups for beams, band bars for columns, and reinforcing bars for wooden building foundations can be used as they are.
That is, the necessary portion has a shape extending in the longitudinal direction of the structural reinforcing bar.

  The arrangement of the plurality of structural rebars according to the present invention can be arranged in the same manner as when a plurality of non-unitized ordinary structural rebars are arranged at the time of construction, and mutually fixed by fixed rebars while maintaining the arrangement. It can be fixed and integrated.

  The shape of the fixed reinforcing bar according to the present invention may be a straight shape, but may be any other shape as long as it is in contact with the heat radiating portions of the plurality of structural reinforcing bars arranged.

  The welding position of the fixed reinforcing bar according to the present invention is near the distal end portion of the heat radiating portion of the structural reinforcing bar. In this case, the vicinity means that the distance from the distal end portion is 15 mm or less. This is to prevent heat at the time of welding from being transmitted to necessary parts and causing thermal deterioration.

  However, if the length of the heat radiating part can be set sufficiently long, unless the required part deteriorates due to heat during welding, the position farther from the tip end, that is, the distance between the heat radiating part and the necessary part It may be welded to a position closer to the boundary line.

  The length of the heat radiating portion according to the present invention is such that even if the Joule heat generated when spot welding the fixed reinforcing bar near the tip portion moves to the necessary portion due to heat conduction in the heat radiating portion, the required portion is thermally degraded. Length that does not cause

  The length of the heat radiating part required to prevent thermal deterioration in the necessary parts even by spot welding depends on the amount of Joule heat generated and the diameter of the reinforcing bar used for the heat radiating part, and the amount of Joule heat depends on the structural reinforcing bar. It changes depending on the conditions such as the diameter of the fixed reinforcing bar, the magnitude of the current, the energizing time, and the pressure.

Under given conditions such as spot welding conditions proposed by the manufacturer of the resistance welding machine, the length of the heat radiating portion is such that at least the temperature of the necessary portion is maintained at 750 degrees Celsius or less, which is considered to be the melting temperature of iron. In view of safety, it can be set longer so that necessary parts are kept below a lower reference temperature (for example, 350 degrees Celsius).
That is, the heat radiating portion is formed in a linear shape and dissipates heat generated by spot welding to keep necessary portions at a predetermined temperature or lower.

  As a welding method to be performed when manufacturing the unit rebar according to the present invention, a known welding method can be used. In particular, spot welding in which mutually rebars are welded at a contact portion to be integrated is used. Can be. In the present specification, description will be made on the assumption that the unit rebar is manufactured using spot welding.

  Further, the welding machine that performs welding may be one that performs welding at one place by one operation or one that performs welding at a plurality of places at the same time. In particular, if a welding machine that performs spot welding at a plurality of places at the same time is used, the unit rebar of the present invention can be efficiently manufactured.

The boundary between the necessary portion of the unit reinforcing bar and the heat radiating portion of the present invention can be indicated by a material whose appearance changes when a predetermined temperature is reached. Such materials are, for example, paints, tapes or labels that change color at a given temperature or substances that melt or become transparent at a given temperature.
The boundary line may be indicated by drawing a line or a dot or applying a tape or a label on the surface of the structural reinforcing bar with such a material. It may be indicated by being coated with an appropriate paint or by applying a tape or a label.
That is, the unit rebar of the present invention includes a boundary display unit that represents a boundary line as a line or a point that draws a boundary line between a necessary part and a heat radiation part, or as a region on the heat radiation part side or the necessary part side adjacent to the boundary line. Things.

Hereinafter, a unit reinforcing bar according to the first embodiment of the present invention will be described with reference to FIGS. 1A and 1B.
Here, FIG. 1A is a schematic view of the unit rebar according to the first embodiment of the present invention viewed from the longitudinal direction of the structural rebar, and FIG. 1B is a diagram illustrating the structure of the unit rebar according to the first embodiment of the present invention. It is the schematic diagram seen from the direction orthogonal to the longitudinal direction of a reinforcing bar.

  The unit reinforcing bar of the present embodiment is a wall unit reinforcing bar 100 that can be used as a vertical bar at the time of wall construction.

  The wall unit reinforcing bar 100 includes a plurality of structural reinforcing bars 110 and fixed reinforcing bars 120.

The structural reinforcing bar 110 is a linear reinforcing bar and includes a necessary portion 111, a heat radiating portion 112, and a boundary line BL as a boundary display portion. The required part 111 and the heat radiating part 112 are separated by a boundary line BL as a boundary display part . That is, the heat radiating portion 112 is formed in a linear shape extending from the necessary portion 111. The plurality of structural reinforcing bars 110 are arranged in parallel with each other and form a virtual arrangement plane as a whole. Therefore, it can be said that the heat radiating portion 112 is located in the arrangement plane formed by the plurality of necessary portions 111.

The welding position WP of the heat radiating section 112 is set in the vicinity of the tip TP, specifically, at a position 10 mm from the tip TP. Therefore, the following equation is established between the distance L1 from the boundary line BL to the welding position WP and the distance L2 from the boundary line BL to the tip portion TP.
L2 = L1 + 10 (mm)

  The fixed reinforcing bars 120 are linear reinforcing bars, and are arranged to be orthogonal to the plurality of structural reinforcing bars 110. The fixed reinforcing bars 120 are integrated with all the structural reinforcing bars 110 by being welded to the plurality of heat radiating portions 112 at the plurality of welding positions WP.

  In some cases, a nugget NG, which is a lump of a melt generated by spot welding, is attached around the welding position WP where the fixed reinforcing bar 120 and the heat radiating portion 112 are welded.

  Next, a method for manufacturing the wall unit reinforcing bar 100 according to the present embodiment will be described.

  When manufacturing the wall unit reinforcing bars 100, first, a plurality of structural reinforcing bars 110 are arranged in parallel and at equal intervals. The interval between the structural reinforcing bars 110 is adjusted to the interval specified as the specification at the time of construction of the wall.

  To prevent the arrangement of the plurality of structural reinforcing bars 110 once arranged from being disturbed, a reinforcing bar for temporary fixing may be extended over the plurality of structural reinforcing bars 110 and temporarily fixed with a reinforcing bar clip or the like.

  Next, the fixed reinforcing bars 120 are inserted so that the plurality of heat radiating portions 112 of the plurality of structural reinforcing bars 110 and the fixed reinforcing bars 120 are in contact at the respective welding positions WP. At this time, the structural reinforcing bars 110 and the fixed reinforcing bars 120 are arranged orthogonally to each other.

  Thereafter, at the welding position WP where the structural reinforcing bar 110 and the fixed reinforcing bar 120 intersect, the structural unit reinforcing bar 110 and the fixed reinforcing bar 120 are welded by using a commercially available spot welding machine, so that the wall unit reinforcing bar 100 can be simplified. Can be manufactured. The conditions for spot welding can be determined so that the structural reinforcing bar 110 and the fixed reinforcing bar 120 are integrated by welding.

  Joule heat generated by performing spot welding at the welding position WP moves in the heat radiation portion 112 in the direction of the boundary line BL by heat conduction. Further, Joule heat moving in the heat radiating portion 112 by heat conduction is dissipated into the air from the surface of the heat radiating portion 112 by heat transfer.

  As a result, even if the temperature at the welding position WP becomes, for example, about 1000 degrees Celsius due to the Joule heat generated by the spot welding, the Joule heat is dissipated into the air as it moves in the direction of the boundary line BL. A temperature gradient is generated in the portion 112, and the temperature of the structural reinforcing bar 110 rises only up to, for example, about 200 degrees Celsius near the boundary line BL.

By the above operation, the required portion 111 of the structural reinforcing bar 110 is not thermally degraded, so that the strength of the structural reinforcing bar 110 does not deviate from a required standard. That is, it is possible to easily manufacture the wall unit reinforcing bar 100 only by performing one spot welding to each welding position WP while maintaining a state in which the necessary part 111 has the strength within the standard range as the structural reinforcing bar. .

  In addition, since the boundary line BL between the necessary part 111 and the heat radiation part 112 is indicated by a material whose appearance changes when the structural reinforcing bar 110 reaches a predetermined temperature at which the structural reinforcing bar 110 thermally degrades, the boundary line BL becomes a predetermined temperature. Since the change in appearance is indicated by the change in appearance, it can be easily confirmed that the necessary portion 111 has not been thermally degraded.

As described above, after arranging the plurality of structural rebars 110 composed of the necessary portions 111 and the heat radiating portions 112 in parallel, the fixed reinforcing bars 120 orthogonal to the plurality of structural rebars 110 are disposed near the tip portions TP of the plurality of heat radiating portions 112. And the fixed rebar 120 and the plurality of structural rebars 110 are welded and integrated by spot welding, so that heat generated by spot welding is dissipated into the air by heat transfer while conducting through the heat radiating portion 112. Since the necessary portion 111 does not undergo thermal deterioration, it is possible to easily manufacture the wall unit reinforcing bar 100 by one spot welding to the same location while maintaining the strength of the structural reinforcing bar 110 within the standard range. it can.

  Next, a procedure for constructing a concrete wall using the wall unit reinforcing bar 100 of the present embodiment will be described.

  Since the wall unit reinforcing bar 100 has a structure in which a plurality of structural reinforcing bars 110 are arranged in parallel, it can be used as a reinforcing vertical bar for a concrete wall.

  The wall unit reinforcing bar 100 is arranged at a position serving as a base of the wall so that the structural reinforcing bar 110 is vertical and the heat radiating portion 112 is higher than the necessary portion 111, and concrete is cast and solidified. The structural unit reinforcing bar 110 is arranged in the concrete placement space CS as the vertical reinforcing bar.

  When arranging the wall unit reinforcing bar 100 in the concrete casting space CS, the distance between the necessary portion 111 and the wall surface WS, that is, the fog DS to the wall surface WS satisfies the specification, and the necessary portion 111 And the upper surface WT of the wall, that is, the fog DT up to the upper surface WT of the wall needs to be arranged at a position satisfying the specification.

  At this time, since the fixed reinforcing bar 120 is welded to the vicinity of the distal end portion TP of the heat radiating portion 112 at the uppermost portion of the structural reinforcing bar 110, the cap is not put on the distal end of the structural reinforcing bar 110 during the curing of the base concrete. However, safety can be ensured.

  In addition, since the heat radiating portion 112 is located within the arrangement surface of the plurality of necessary portions 111, the dimension at which the fixed reinforcing bars 120 protrude from the necessary portion 111 in a direction approaching the wall surface WS is fixed at the maximum. Since the diameter is the diameter of the reinforcing bar 120, the influence on the strength of the concrete can be reduced.

Next, a unit reinforcing bar according to a second embodiment of the present invention will be described with reference to FIGS. 2A and 2B.
Here, FIG. 2A is a schematic view of the unit rebar according to the second embodiment of the present invention viewed from the longitudinal direction of the structural rebar, and FIG. 2B is a diagram showing the structure of the unit rebar according to the second embodiment of the present invention. It is the schematic diagram seen from the direction orthogonal to the longitudinal direction of a reinforcing bar.

  The unit reinforcing bar of the present embodiment is a wall unit reinforcing bar 200 that can be used as a vertical bar at the time of wall construction.

The wall unit reinforcing bar 200 includes a plurality of structural reinforcing bars 210 and fixed reinforcing bars 220.
The structural reinforcing bar 210 includes a necessary part 211, a heat radiating part 212, and a boundary line BL as a boundary display part . The necessary part 211 and the heat radiating part 212 are separated by a boundary line BL as a boundary display part. I have.

  The wall unit reinforcing bar 200 of the present embodiment has the same configuration as that of the first embodiment except that the heat radiation portion 112 is bent in a J-shape.

  When the wall is constructed using the wall unit reinforcing bar 200 of the present embodiment, the heat radiation part 212 is bent in a J-shape, so that the wall part upper surface WT is oriented with respect to the necessary part 211. The projecting length is shorter than the length of the heat radiating portion 212, and the size of the heat radiating portion 212 protruding in a direction approaching the wall body upper surface WT is further smaller than that of the first embodiment. It can be even smaller.

Next, a unit reinforcing bar according to a third embodiment of the present invention will be described with reference to FIGS. 3A and 3B.
Here, FIG. 3A is a schematic view of the unit rebar according to the third embodiment of the present invention viewed from the longitudinal direction of the structural rebar, and FIG. 3B is a diagram illustrating the structure of the unit rebar according to the third embodiment of the present invention. It is the schematic diagram seen from the direction orthogonal to the longitudinal direction of a reinforcing bar.

  The unit rebar according to the present embodiment is a wall unit rebar 300 that can be used as a vertical bar during wall construction.

The wall unit reinforcing bar 300 includes a plurality of structural reinforcing bars 310, fixed reinforcing bars 320, and a boundary line BL as a boundary display section .
The structural reinforcing bar 310 includes a necessary part 311, a heat radiating part 312, and a boundary line BL as a boundary display part . The necessary part 311 and the heat radiating part 312 are separated by a boundary line BL as a boundary display part. I have.

  The wall unit reinforcing bar 300 of the present embodiment has the same configuration as that of the first embodiment except that the heat radiating portion 312 is arranged to be orthogonal to the necessary portion 311.

  When the wall is constructed using the wall unit reinforcing bar 300 of the present embodiment, the heat radiating unit 312 is configured to be orthogonal to the necessary unit 311, so that the heat radiating unit 312 and the fixed reinforcing bar 320 However, since none of them protrudes in the longitudinal direction of the necessary portion 311, the dimension where the heat radiating portion 312 and the fixed reinforcing bar 320 protrude in a direction approaching the surface of the structure, specifically, the upper surface WT of the wall, is about these diameters. The dimensions are extremely small, and the effect on the strength of the concrete can be extremely reduced.

Next, a unit reinforcing bar according to a fourth embodiment of the present invention will be described with reference to FIG.
Here, FIG. 4 is a schematic view of the unit rebar according to the fourth embodiment of the present invention as viewed from the longitudinal direction of the fixed rebar.

  The unit reinforcing bar of this embodiment is a beam unit reinforcing bar 400 that can be used as a stirrup at the time of beam construction.

The unit reinforcing bar 400 for beams includes a plurality of structural reinforcing bars 410, fixed reinforcing bars 420, and a boundary line BL as a boundary display section .
The structural reinforcing bar 410 includes a necessary part 411 and a heat radiating part 412, and the necessary part 411 and the heat radiating part 412 are separated by a boundary line BL as a boundary display part .

  The beam unit reinforcing bar 400 of the present embodiment is configured in the same manner as the first embodiment, except that the necessary part 411 is formed in a rectangular shape in the same manner as a known stirrup.

  In the beam reinforcing bar 400 of the present embodiment, since the heat generated by welding is dissipated into the air by heat transfer while conducting through the heat radiating portion 412, the necessary portion 411 of the structural reinforcing bar 410 does not undergo thermal deterioration. It can be easily manufactured.

  Although the unit rebar of this embodiment has been described as being used as stirrups at the time of beam construction, it can also be used as a bar at the time of column construction by changing the orientation of the arrangement at the time of concrete construction. it can.

Next, a unit reinforcing bar according to a fifth embodiment of the present invention will be described with reference to FIG.
Here, FIG. 5 is a schematic view of the unit rebar according to the fifth embodiment of the present invention as viewed from the longitudinal direction of the fixed rebar.

  The unit rebar according to the present embodiment is a beam unit rebar 500 that can be used as a stirrup at the time of beam construction.

The unit reinforcing bar 500 for beams includes a plurality of structural reinforcing bars 510, fixed reinforcing bars 520, and a boundary line BL as a boundary display section .
The structural reinforcing bar 510 includes a necessary part 511 and a heat radiating part 512, and the required part 511 and the heat radiating part 512 are separated by a boundary line BL as a boundary display part .

  The beam unit rebar 500 of the present embodiment is similar to the known stirrup, except that the required part 511 is bent in a U-shape with both upper ends formed into inward hooks. The configuration is the same as in the example.

  In the beam reinforcing bar 500 of the present embodiment, since the heat generated by welding is dissipated into the air by heat transfer while conducting through the heat radiating portion 512, the required portion 511 of the structural reinforcing bar 510 does not undergo thermal deterioration. It can be easily manufactured.

Next, a unit reinforcing bar according to a sixth embodiment of the present invention will be described with reference to FIG.
Here, FIG. 6 is a schematic view of the unit rebar according to the sixth embodiment of the present invention as viewed from the longitudinal direction of the fixed rebar.

  The unit rebar of the present embodiment is a unit rebar for foundation 600 that can be used as a reinforcing bar when constructing a solid foundation of a wooden building.

The base unit reinforcing bar 600 includes a plurality of structural reinforcing bars 610, fixed reinforcing bars 620, and a boundary line BL as a boundary display section .
The structural reinforcing bar 610 includes a necessary part 611 and a heat radiating part 612, and the necessary part 611 and the heat radiating part 612 are separated by a boundary line BL as a boundary display part .

  In the foundation unit reinforcing bar 600 of the present embodiment, the necessary portion 611 includes a vertical portion, a first horizontal portion, a second horizontal portion, and an inclined connection portion, and includes a vertical portion, a first horizontal portion, an inclined connection portion, and a second horizontal portion. The configuration is the same as that of the first embodiment, except that the parts are integrally arranged in the arrangement order.

  In the base unit rebar 600 of the present embodiment, since the heat generated by welding is dissipated into the air by heat transfer while conducting through the radiator 612, the necessary portion 611 of the structural rebar 610 is not thermally degraded. It can be easily manufactured.

As described above, according to the unit rebar of the present invention, a plurality of structural rebars arranged in parallel to each other and a fixed rebar orthogonal to the structural reinforce are unit rebars, The structural reinforcing bar extends in the longitudinal direction of the structural reinforcing bar and has a required portion having a strength within a specified range, and is formed in a linear shape extending from the required portion to dissipate heat generated by spot welding to reduce the required strength. made a part of a boundary display that indicates the border line between the heat dissipating unit and the required unit and the heat radiating portion to maintain below the predetermined temperature, the fixing reinforcing bars, by being welded to the vicinity of the tip portion of the heat radiating portion, for dissipating into the air by the heat transfer between the heat generated by spot welding is conducted to the heat radiating portion, while thermal degradation required portion of the structure rebar maintaining the strength of the standard range not occur, the same portion Perform spot welding once It is possible to provide a unit rebar that can be easily produced in the body.

Further, according to the method for manufacturing a unit reinforcing bar of the present invention, after arranging a plurality of structural reinforcing bars composed of a necessary portion and a heat radiating portion in parallel, a fixed reinforcing bar orthogonal to the plurality of structural reinforcing bars is formed at a tip portion of the plurality of heat radiating portions. The fixed rebar and the plurality of structural rebars are welded together by spot welding and integrated, so that the generated heat is dissipated into the air by heat transfer while conducting through the heat radiating part, Does not cause thermal deterioration, so that the unit rebar can be easily manufactured by performing only one spot welding on the same location .

100, 200, 300: wall unit reinforcing bars 400, 500: beam unit reinforcing bars 600: foundation unit reinforcing bars 110, 210, 310, 410, 510: structural reinforcing bars 111, 211, 311; 411, 511: Necessary parts 112, 212, 312, 412, 512: Heat dissipating parts 120, 220, 320, 420, 520: Fixed rebar NG: Nugget (lumps of molten material)
TP: tip part BL: border line (boundary display part)
WP: welding position L1: distance from the boundary line to the welding position L2: distance from the boundary line to the tip CS: concrete placement space (dashed-dotted line)
WS: Wall surface WT: Upper surface of wall DS: Fog to wall surface DT: Fog to upper surface of wall

Claims (7)

A plurality of structural rebars arranged in parallel with each other, and a fixed rebar orthogonal to the structural rebar are unit rebars integrated by spot welding ,
The structural reinforcing bar extends in the longitudinal direction of the structural reinforcing bar and has a required portion having a strength within a specified range, and is formed in a linear shape extending from the required portion to dissipate heat generated by spot welding to reduce the required strength. A boundary display portion indicating a boundary between the heat radiating portion and the necessary portion and the heat radiating portion for keeping the portion below a predetermined temperature ,
Unit rebar the fixed reinforcing bar, characterized in that it is welded in the vicinity of the tip portion of the heat radiating portion.   2. The unit reinforcing bar according to claim 1, wherein the heat radiating unit is located within a plane where the plurality of necessary units are arranged. 3. The unit rebar according to claim 1 or 2, wherein the heat radiating portion is extended integrally from the necessary portion and is integrally formed in a line .   4. The unit reinforcing bar according to claim 1, wherein the heat radiating portion is bent in a J-shape. 5. The unit reinforcing bar according to claim 1, wherein the heat radiating portion is configured to be orthogonal to the necessary portion. The boundary display unit, the unit rebar of claim 1 to claim 5, characterized in that appearance upon reaching a predetermined temperature is a material that changes. Radiating portion and the necessary portion and said which is configured to extend from the required unit and the required unit having an intensity within the standard range linearly dissipate the heat generated by spot welding maintain the necessary portion below a predetermined temperature After arranging in parallel a plurality of structural rebars consisting of a boundary display portion indicating a boundary line with the heat radiating portion , a plurality of fixed reinforcing bars orthogonal to the structural rebar are brought into contact with the vicinity of the tip portions of the plurality of heat radiating portions, A method for manufacturing a unit reinforcing bar, wherein a plurality of the structural reinforcing bars and the fixed reinforcing bars are welded and integrated by spot welding.