JP5952632B2 - Support bar material - Google Patents

Description

  The present invention relates to a bar material for supporting concrete embedded objects.

  Concrete burial such as a box for cable wiring, a box for a fluid that houses a joint to which a fluid pipe such as a hot water pipe or gas pipe is connected, a pipe end fixture that is connected to a wire pipe or a fluid pipe and is fixed to a formwork To embed an object in the wall of a reinforced concrete building, before placing the concrete in the formwork, the concrete embedment is supported by the rebar that constitutes the concrete formwork and the concrete embedment is placed in the concrete formwork. It is necessary to fix it in a pressed state. Therefore, conventionally, for example, the bar material of Patent Document 1 is used.

  In patent document 1, as shown to Fig.8 (a), while fixing the bar material 1 to the concrete embedding thing 4, bending the said bar material 1, and bundling and fixing the both ends with respect to the reinforcing bar 5, it is bar material. A concrete buried object 4 is supported by a reinforcing bar 5 through 1. This bar material 1 is made of an iron wire called a wire that can be bent by hand, and has a tensile strength capable of pressing the concrete embedded object 4 against the formwork of the reinforcing bar 5 in a state of being bent and attached. Moreover, the spiral groove 2 is formed in the outer surface of the bar material 1 by cutting (by rotating a cutting tool) over the entire length. The spiral groove 2 increases the slip resistance between the reinforcing bar 5 and the bar material 1 and prevents the displacement of the concrete embedded object 4 with respect to the reinforcing bar 5. And when actually constructing using this bar material 1, in order to prevent corrosion (oxidation) of the bar material 1 which consists of an iron wire, as shown in FIG.8 (b), the surface of the bar material 1 is shown. Therefore, it was necessary to form the oil layer 3. The oil layer 3 is formed by applying a large amount of oil to the surface of the bar material 1.

Japanese Utility Model Publication No. 6-6603

  However, in the bar material of Patent Document 1, since it is necessary to hold the concrete buried object for a long period of time, a large amount of oil is prevented so that the entire bar material surface is not exposed to the outside air (air contained in the concrete) at all. It is applied to the surface. For this reason, the operator must hold the bar material covered with oil by hand to fix the concrete buried object, and various problems have arisen. In other words, the surface of the bar material becomes slippery due to the oil layer provided on the bar material, and there is a problem that it takes time to fold the bar material at the time of work. Alternatively, the operator slides the bar material from the hand and drops it, and in particular, since the connected buried object (box etc.) and the steel bar material have a certain weight, the bar material and the box There has been a problem that a danger occurs such that the worker below is directly hit and injured as a weapon. Furthermore, there is a problem that the comfort of the work is impaired due to the dirt and stickiness of the hand due to the oil adhering to the hand of the worker. Also, if the oil layer oozes out into the concrete over time and part of it becomes thin, or if the oil layer is peeled off or wiped off (by touching it with the hand) during work, There was a problem that the bar material was corroded from the portion exposed to the outside air. Furthermore, the oil applied to the surface of the bar material functions as a lubricating oil, and there is a problem that the frictional resistance between the bar material and the reinforcing bar is lowered, and the displacement of the concrete embedded object cannot be sufficiently prevented.

  The present invention has been made in order to solve the above-mentioned problems, and its object is to provide a bar material for supporting a concrete buried object which is resistant to changes with time and has been subjected to corrosion prevention treatment while ensuring high workability. There is to do.

The support bar material according to claim 1 is formed so as to be bendable in a three-dimensional direction by hand, and is attached to the concrete buried object, and both ends projecting from the concrete buried object are rebars that form the supporting frame of the concrete structure. It is a supporting bar material that supports concrete embedded by reinforcing bars by being fixed, and has a tensile strength against a standing frame to form a concrete structure, and the soft synthetic resin layer has its surface Ri Na is formed, when the support bar member is fixed to the reinforcing bar, to match the soft synthetic resin layer surface is deformed to the outer surface shape of the tie wire for binding reinforcing bars or reinforcing steel, reinforcing bar or tie wire Is characterized in that the soft synthetic resin layer is formed with a predetermined thickness such that the soft synthetic resin layer fits into a recess formed on the soft synthetic resin layer .

The support bar material according to claim 2 is characterized in that, in the support bar material according to claim 1 , the soft synthetic resin layer is colored to identify the type of the wiring system or the like.

A method according to claim 3 is a method of supporting a concrete buried object on a reinforcing bar by the supporting bar material according to claim 1 or 2 , wherein the step of attaching the supporting bar material to the concrete buried object, and concrete Including a step of winding both ends of the support bar protruding from the embedded object around the reinforcing bar, and a step of fixing the support bar wound around the reinforcing bar and the reinforcing bar with a binding wire, and the reinforcing bar and the binding wire are for support It is characterized by biting into the soft synthetic resin layer of the bar material, and the support bar material being in close contact with and in contact with the reinforcing bar and the binding wire.

  The invention according to claim 1 provides a bar material for supporting a concrete embedded object in which a soft synthetic resin layer is formed on the surface in order to replace the conventional bar material coated with anti-corrosion oil on the surface. In the support bar material of the present invention, by forming a soft synthetic resin layer on the surface of the support bar material, the (metal) core material inside the soft synthetic resin layer is directly exposed to the outside air (or air in the concrete). The corrosion (oxidation) of the support bar material can be more reliably prevented. Thus, since the core material surface is covered with the soft synthetic resin layer, there is no need to apply oil to the surface of the supporting bar material. In comparison, the surface of the support bar material becomes less slippery, and the operator can easily handle the support bar material by hand. Also, when the operator grips the support bar material by hand, the soft synthetic resin layer bends moderately (microscopically or macroscopically) and the fingers and the surface of the support bar material come into close contact with each other. The support bar is prevented from slipping through the fingers. For this reason, when an operator performs the installation work of the support bar material, the risk of the operator sliding and dropping the support bar material can be significantly reduced. Therefore, the support bar material of the present invention greatly improves the safety of the work for fixing a concrete buried object. Further, even if the support bar material is touched, the operator's hand is soiled by oil as in the conventional case and does not become sticky. Therefore, the support bar material of the present invention significantly improves work comfort.

  Moreover, since the surface layer of the support bar material which a concrete embedding thing, a reinforcing bar, or a binding wire contacts is formed with the soft material, stronger frictional resistance can be exhibited between these. That is, in general, the solid surface is composed of a large number of irregularities in a microscopic region, and particularly when one solid is a soft material, the irregularities on the surface of the soft material are crushed and easily elastically deformed during frictional contact. For this reason, when at least one of the substances that make frictional contact is soft, the true contact area between the two surfaces in the microscopic region increases, and the frictional resistance increases. It is theorized based on Taber's junction growth theory that the friction coefficient representing the frictional resistance between the two surfaces increases as the hardness of the material decreases.

  For example, in the present invention, when the supporting bar material is folded in a state where the concrete embedded object is supported by the reinforcing bar due to the high frictional force between the supporting bar material (soft surface) and the reinforcing bar (hard surface), The bar material can be easily folded without sliding against the rebar. Further, when the support bar material of the present invention is fixed to the reinforcing bar, this frictional force works between the supporting bar material and the reinforcing bar (that is, the frictional force is not reduced by the oil layer), It is possible to prevent the bar material and the reinforcing bar from sliding with respect to each other, and to suppress the occurrence of positional deviation of the concrete embedded with respect to the reinforcing bar. Needless to say, these effects are also exhibited in the relationship between the support bar material and the concrete buried object, and the support bar material and the binding wire. Furthermore, the soft synthetic resin layer on the surface of the supporting bar material exhibits a superior anti-slip effect even when compared with a hard metal outer surface not coated with oil. That is, the support bar material of the present invention remarkably improves the ease, quickness, efficiency, and certainty of the work for fixing a concrete buried object.

  Furthermore, the support bar material of the present invention is superior to the conventional bar material in the effect of preventing corrosion over time. That is, even if a large amount of oil is applied to the bar material, the oil soaks into the concrete over time, and the oil layer on the surface of the bar material becomes thin, which may reduce the corrosion prevention effect. On the other hand, in the support bar material of the present invention, since the soft synthetic resin layer is formed on the surface, as long as it is embedded in the concrete, there is almost no possibility that the soft synthetic resin layer is peeled off and corroded. The prevention effect can be exhibited stably.

  Therefore, the support bar material of the present invention significantly improves the workability when supporting the concrete buried object on the reinforcing bar, as compared with the bar material having a conventional oil layer and the hard metal outer surface bar material, It also improves the durability after installation.

In addition to the above effects, the support bar material according to claim 1 has a concave surface of the soft synthetic resin layer having a predetermined thickness with which the reinforcing bar or the binding wire comes into contact, and the reinforcing bar or the binding wire has a predetermined depth in the soft synthetic resin layer. By biting into the thickness, a more excellent anti-slip effect can be exhibited.

In addition to the effect of the support bar material according to claim 1 , the support bar material according to claim 2 has a soft synthetic resin layer colored to identify the type of the wiring system and the like. The use of the object can be identified at a glance, and misidentification in the wiring work to the concrete buried object can be reduced.

According to the method of Claim 3 , a concrete embedding thing can be supported by a reinforcing bar with the said support bar material, exhibiting the effect of the support bar material of Claim 1 or 2 . In other words, according to the method of the present invention, the workability when supporting a concrete buried object on a reinforcing bar is remarkably improved as compared with a method using a bar material having a conventional oil layer or a bar material having a hard metal outer surface. In addition, durability after installation can also be improved.

The perspective view in the state where the reinforcing bar is supporting the concrete buried object using the bar material for support in one embodiment of the present invention. The figure which shows the state by which the concrete embedment of FIG. 1 is embedded in the wall. The support bar material of FIG. 1 is shown, (a) is a perspective view, (b) is a longitudinal cross-sectional view. The wiring box of FIG. 1 is shown, (a) is a perspective view, (b) is AA sectional drawing. FIG. 2 shows a process of supporting a concrete buried object on a reinforcing bar with the supporting bar material of FIG. 2, (a) a step of inserting the supporting bar material into the concrete buried object, and (b) a support inserted into the concrete buried object. A step of bending the bar material for use, and (c) a step of fixing the concrete buried object to the reinforcing bar through the support bar material. In FIG.5 (c), (a) shows the contact state of a soft synthetic resin layer and a reinforcing bar, (b) is the partial expansion schematic which shows the contact state of a soft synthetic resin layer and a binding wire. The perspective view of the state which attached the bar material for support in one embodiment of the present invention to another concrete embedded object. The bar material in a prior art is shown, (a) is the perspective view of the state which supported the concrete embedding thing on the reinforcing bar through the said bar material, (b) is the said bar material in which the oil layer was provided at the time of installation FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the shape of each figure referred in the following description is a conceptual diagram or a schematic diagram for explaining a suitable shape dimension, and a dimension ratio etc. do not necessarily correspond with an actual dimension ratio. That is, the present invention is not limited to the dimensional ratio in the drawings.

  FIG. 1 shows a state in which a wiring box 20 as a concrete buried object is fixed to a reinforcing bar 30 using a support bar material 10 according to an embodiment of the present invention. Reinforcing bars 30 are assembled in a lattice shape to form the backbone of the concrete structure, and concrete is cast on the basis of the form of the reinforcing bars 30 that are erected to form the concrete structure, thereby constructing a concrete wall. The FIG. 1 shows a state before placing concrete, in which two supporting bar members 10 are inserted into a wiring box 20, and an end 11 of the supporting bar member 10 is wound around a reinforcing bar 30. In addition, the support bar 10 is bound and fixed to the reinforcing bar 30 by the binding wire 31.

  FIG. 2 shows a state in which concrete is placed on the form of the reinforcing bar 30 that supports the wiring box 20 via the support bar member 10 in the state of FIG. The support bar 10 is attached to the back side of the wiring box 20, and the opening 22 side of the wiring box 20 is located on the wall surface W side. The support bar member 10 is bent toward the wall surface W so that the wiring box 20 is positioned on the wall surface W side. In this bent state, the wiring box 20 is attached to the form of the reinforcing bar 30. It has a tensile strength sufficient to press.

  With reference to FIG. 3 (a) and (b), the support bar material 10 is demonstrated. As shown in FIG. 3A, the support bar 10 is a rod having a short diameter, and a soft synthetic resin layer 12 is formed on the surface thereof. Furthermore, a flat engagement piece 13 is provided in the approximate center of the support bar 10. The soft synthetic resin layer 12 constitutes the outer surface of the entire support bar member 10 including the engagement piece 13. The engaging piece 13 is formed by being flattened by pressing before or after the core material 14 of the support bar 10 is covered with the soft synthetic resin layer 12. As will be described later, the engagement piece 13 is fitted into the insertion hole 23 of the wiring box 20 and functions as a rotation preventing means. Note that the engagement piece 13 is not an essential component of the present invention, and may be omitted.

  FIG. 3B is a longitudinal sectional view of the support bar member 10. The support bar member 10 includes a core member 14 made of iron wire at the center thereof, and a soft synthetic resin layer 12 is in close contact with and covered with the outer periphery of the core member 14. The core material 14 of the support bar 10 has a diameter d1 in its cross section, while the soft synthetic resin layer 12 has a predetermined thickness d2. In the present embodiment, the diameter d1 of the support bar 10 is 4 mm, whereas the thickness d2 of the soft synthetic resin layer 12 is about 0.4 mm.

  The predetermined thickness d2 of the soft synthetic resin layer 12 is preferably 0.1 mm or more. That is, when the predetermined thickness d2 is 0.1 mm or more, when the soft synthetic resin layer 12 comes into contact with the outer surface of the reinforcing bar 30 or the binding wire 31, the surface is bent and deformed so as to be macroscopically depressed, and the reinforcing bar 30 Or by biting into the binding wire 31, it is possible to exhibit a more excellent anti-slip effect between the surface of the support bar 10 and the reinforcing bar 30. That is, the surface of the soft synthetic resin layer 12 is deformed in accordance with the outer surface shape of the reinforcing bar 30 or the binding wire 31, and the reinforcing bar 30 or the binding wire 31 is fitted into the recess formed on the soft synthetic resin layer 12, so that the support The relative movement between the bar material 10 and the reinforcing bar 30 or the binding wire 31 is suppressed. However, the present invention is not limited to this, and is included in the technical scope of the present invention as long as the surface of the soft synthetic resin layer is microscopically deformed to exhibit the anti-slip effect or the corrosion prevention effect. The thickness of the soft synthetic resin layer can be arbitrarily changed.

  Further, the core material 14 of the support bar 10 is made of an iron wire called a number wire, has a hardness that can be folded by hand, and is a concrete buried object to which it is attached in a folded state (one embodiment). Then, it has a tensile strength capable of pressing the wiring box 20) against the mold. However, the diameter or cross-sectional shape of the core material 14 of the support bar 10 can be arbitrarily set, and the material of the core material 14 can be arbitrarily selected. For example, instead of the iron wire employed in this embodiment, a plated wire coated with zinc or the like can be employed. Furthermore, by using a core material whose surface has been processed with irregularities, the irregularities are also transferred to the surface of the soft synthetic resin layer, and a further anti-slip effect can be expected.

  The soft synthetic resin layer 12 is formed from a soft synthetic resin material such as polyethylene, polypropylene, vinyl chloride, silicon, and synthetic rubber. However, the soft synthetic resin material of the present invention refers to a material that bends and deforms microscopically or macroscopically, and is not limited to the specific material described above. The supporting bar material 10 is manufactured by extrusion-coating a synthetic resin material onto the core material 14. By this extrusion coating step, the soft synthetic resin layer 12 is formed in close contact with the core material 14. Alternatively, the supporting bar material 10 can be manufactured by forming an adhesive layer around the core material 14 and bonding the soft synthetic resin layer 12 and the core material 14 together. And in this embodiment, although the surface of the soft synthetic resin layer 12 is smooth, you may form an unevenness | corrugation in the surface by embossing etc.

  Furthermore, in the support bar material 10 of the present embodiment, the soft synthetic resin layer 12 can be colored during the manufacturing process (extrusion coating process) or in a subsequent process. In this coloring, a plurality of colors are selectively used according to the type of the wiring system and the operator can immediately identify the type of the wiring system. The “coloring” means that the surface of the soft synthetic resin layer has a predetermined color, and includes, for example, a combination of a transparent soft synthetic resin layer and a colored core material. It is a concept. Further, in the support bar material 10 of the present embodiment, the soft synthetic resin layer 12 covers the entire outer periphery of the core material 14, but in the present invention, the soft synthetic resin layer is only a part of the outer periphery of the support bar material. The form which covers is included. That is, the present invention is not limited to the embodiment as long as the main objects of the present invention such as oxidation prevention and workability improvement can be achieved.

  With reference to FIG. 4, the form of the wiring box 20 used in the present embodiment will be described. As shown in FIG. 4A, the wiring box 20 is a rectangular box having an opening 22 on the front surface and the back surface closed by a bottom wall 21a. Then, two insertion holes 23 are formed in each of the pair of opposing side walls 21b (four in total), and each insertion hole 23 is positioned in the vicinity of the four corners of the bottom wall 21a. Each insertion hole 23 has a shape in which a circular hole having a diameter corresponding to the diameter dimension of the support bar member 10 and a rectangular hole corresponding to the width dimension of the engagement piece 13 are combined.

  FIG.4 (b) is AA sectional drawing of Fig.4 (a). As shown in FIG. 4 (b), a space between one insertion hole 23 and the other insertion hole 23 positioned opposite thereto is defined by a bar material insertion portion 23b extending between the opposing side walls. The elongated hole 23a extends, and one insertion hole 23, the elongated hole 23a, and the other insertion hole 23 communicate with each other. That is, each insertion hole 23 and the long hole 23a are configured so that the support bar material 10 can be inserted. The cross-sectional shape of the long hole 23a corresponds to the shape of the circular hole of the insertion hole 23, and a stepped engagement surface is formed between the insertion hole 23 and the long hole 23a (bar material insertion portion 23b). 23c is formed. When the engaging piece 13 of the supporting bar member 10 is fitted into the insertion hole 23 and the engaging piece 13 and the engaging surface 23c are engaged, the supporting bar member 10 cannot rotate in the circumferential direction. It can be fixed to the wiring box 20. In addition, the wiring box 20 provided with this rotation prevention means is based on the technical idea disclosed by patent document (Unexamined-Japanese-Patent No. 2008-263780).

  Next, with reference to FIG. 5A to FIG. 5C, a method for constructing the reinforcing bar 30 in a state of supporting the wiring box 20 (the state of FIG. 1) using the support bar material 10 will be described.

  First, as shown in FIG. 5A, one of the four insertion holes 23 (upper insertion) provided in the vicinity of the four corners of the bottom wall 21a of the wiring box 20 (located opposite to the opening 22). One end 11a of the support bar member 10 is inserted into the hole 23-1). The support bar member 10 is supported so that the engagement piece 13 of the support bar member 10 is fitted into the upper insertion hole 23-1 until one end 11a of the support bar member 10 passes through the lower insertion hole 23-2. The bar material 10 is inserted into the wiring box 20, and the support bar material 10 is passed through the upper and lower two insertion holes 23-1, 23-2 (on one edge side). That is, the support bar 10 is arranged so that one end 11 a and the other end 11 b of the support bar 10 extend from the side wall of the wiring box 20. At this time, the engagement piece 13 of the support bar member 10 is engaged with the end edge of the insertion hole 23 and the engagement surface 23c, so that the support bar member 10 is not rotated in the circumferential direction. 20 can be reliably supported.

  Next, as shown in FIG. 5 (b), the portions (one end 11 a and the other end 11 b) extending from the wiring box 20 of the supporting bar member 10 are placed on the mold side of the reinforcing bar 30 (that is, the back surface of the wiring box 20. Bend it by hand at a predetermined angle. Similarly, another supporting bar member 10 is inserted into an insertion hole 23 provided on the other edge, and fixing and bending operations are performed. During the bending operation of the support bar material 10, the edge or edge of the insertion hole 23 bites into the soft synthetic resin layer 12 of the support bar material 10, so that the support bar material 10 is in contact with the wiring box 20. Thus, the support bar member 10 can be easily bent.

  Then, as shown in FIG. 5C, the support bar 10 fixed to the wiring box 20 is wound around the reinforcing bar 30. At this time, by bending the end 11 side of the support bar material 10 by hand, the support bar material 10 is wrapped around the reinforcing bar 30, and the support bar material 10 and the reinforcing bar 30 are bound and fixed by the binding wire 31, The wiring box 20 is supported by the reinforcing bar 30 through the support bar 10.

  In FIG.5 (c), the partial expanded schematic diagram which shows the contact state with the soft synthetic resin layer 12, the reinforcing bar 30, and the binding wire 31 of the support bar material 10 is shown to Fig.6 (a) and (b). As shown in FIGS. 6A and 6B, the soft synthetic resin layer 12 of the support bar 10 is configured with a predetermined thickness d2 (= 0.4 mm), and the reinforcing bar 30 and the binding wire 31 are made of the soft synthetic resin. It bites into the surface of the layer 12, and the surface is macroscopically bent and deformed. The thickness of the soft synthetic resin layer 12 is d3 (about 0.1 to 0.3 mm, depending on the strength of the contact) at the contact portion, and the recess 15 having a depth (d2-d3) is the soft synthetic resin layer. 12 formed on the surface. Since the shape of the concave portion 15 matches the outer surface shape of the reinforcing bar 30 and the binding wire 31, the support bar 10 and the reinforcing bar 30 and the binding wire 31 are in close contact with each other, and the relative movement between them is suppressed. . Thus, when the reinforcing bar 30 and the binding wire 31 bite into and adhere to the surface of the soft synthetic resin layer 12, the microscopic and macroscopic contact areas increase, and a higher frictional resistance is generated between them. Therefore, in FIGS. 6A and 6B, the support bar 10 is firmly fixed so as not to deviate from the fixed position.

  In addition, it cannot be overemphasized that the support bar material 10 of this embodiment can be used for concrete embedded objects other than the said wiring box 20. FIG. For example, as shown in FIG. 7, the supporting bar 10 is fixed to a square mounting plate 20 </ b> A, and the mounting plate 20 </ b> A is attached to a concrete embedded such as a wiring box, thereby supporting the concrete embedded on the reinforcing bar 30. It is possible. Further, when there is no reinforcing bar in the vicinity of the embedded position of the embedded object, a support material is installed between the reinforcing bars, and the support bar 10 is fixed to the support material, thereby supporting the concrete embedded object at a predetermined position. Can be made. This support material is incorporated in the form of the reinforcing bar and can be considered equivalent to the reinforcing bar. That is, it goes without saying that any support material for attaching the support bar material 10 is included in the reinforcing bar of the present invention.

  Hereinafter, the effect of the bar material 10 for support of one Embodiment of this invention is demonstrated.

  In the supporting bar material 10 according to the present embodiment, the soft synthetic resin layer 12 is formed on the surface thereof, so that the inner core material 14 is not exposed to the outside air (or oxygen in the concrete), and the bar material is more reliably obtained. Corrosion of can be prevented. Thus, since the core material 14 made of iron wire is protected by the soft synthetic resin layer 12, it is not necessary to apply oil to the bar material to prevent corrosion. In a conventional bar material coated with oil, for example, the supporting bar material 10 may fall during work at a high place, and a serious accident may occur that damages people or objects below. was there. On the other hand, in the support bar material 10 of the present embodiment, when the operator grips the support bar material 10 by hand, the soft synthetic resin layer 12 bends moderately (microscopically or macroscopically), Since the fingers and the surface of the support bar material 10 are in close contact with each other, they are familiar with the hand, and the support bar material 10 is prevented from slipping through the fingers. That is, the soft synthetic resin layer 12 formed on the surface of the support bar 10 has a non-slip property compared to a bar material having an oil layer or a hard bar material (no oil is applied) which has been conventionally used. In order to exhibit the effect, the operator can easily handle the support bar material 10 by hand. Therefore, when the worker arranges the reinforcing bar 30 with the supporting bar material 10 in the state shown in FIG. 1 so that the concrete buried object (wiring box 20) is supported, the operator firmly holds the supporting bar material 10. Therefore, it is possible to remarkably reduce the risk of sliding the supporting bar member 10 from the hand and dropping it. That is, the support bar material 10 of the present embodiment greatly improves the safety of the work for fixing the concrete buried object.

  Further, when the support bar material 10 is bent so that the wiring box 20 is supported by the reinforcing bar 30, the friction resistance on the bar material surface is not lowered by the oil layer as in the conventional case. Can be folded easily without sliding (to the hand or wiring box, rebar, binding wire). In particular, as shown in FIG. 6, the hard wiring box 20, the reinforcing bar 30, and the binding wire 31 (hereinafter, reinforcing bar 30) are in contact with the soft synthetic resin layer 12 having a predetermined thickness d <b> 2 (> 0.1 mm) and the surface thereof. Is bent into the surface with a predetermined depth (d2-d3). That is, since the soft synthetic resin layer 12 has a predetermined thickness d2 (> 0.1 mm) sufficient to allow the reinforcing bar 30 or the like to penetrate, the adhesion of the supporting bar material 10 to the reinforcing bar 30 or the like is good. This increases the frictional force between them. And it functions as a non-slip | skid with respect to the reinforcing bar 30 etc. with which the soft synthetic resin layer 12 contacts. In other words, it becomes even easier to hold and bend the support bar material 10 firmly by hand, and fix the bar material 10 to the rebar 30 etc. without sliding, so that the support bar material 10 and the rebar 30 etc. can be more reliably secured. Can be fixed. Further, when the supporting bar material 10 is fixed to the reinforcing bar 30 or the like, a high frictional force due to this biting works between the supporting bar material 10 and the reinforcing bar 30 or the like, so that the supporting bar material 10 acts on the reinforcing bar 30 or the like. Therefore, it is possible to prevent the wiring box 20 from being displaced with respect to the reinforcing bar 30 during installation or after installation. That is, the support bar material of the present invention improves the ease, quickness (efficiency), and certainty of fixing work of concrete embedded objects.

  Furthermore, by adopting the soft synthetic resin layer 12 instead of the conventional peritoneum made of oil, even if the support bar material 10 is touched, the operator's hand is soiled by the oil and does not become sticky. The comfort of fixed work for buried objects is also significantly improved. Therefore, the bar material 10 for support of this embodiment is easy in the operation | work which supports the concrete embedding thing (wiring box 20) to the reinforcing bar 30 compared with the bar material which has the oil layer of the past (patent document 1). The workability in all aspects such as quickness, efficiency and safety is remarkably improved.

  And the support bar material 10 of one Embodiment is excellent also in the point of the corrosion prevention effect with time rather than the conventional bar material. That is, even if a large amount of oil is applied to the bar material, the oil layer on the surface of the bar material becomes thin due to factors such as the oil soaking into the concrete over time, and the corrosion prevention effect may be reduced. On the other hand, in the support bar material 10, since the soft synthetic resin layer 12 is formed in close contact with the outer surface of the core material 14, the soft synthetic resin layer 12 may peel off as long as it is embedded in the concrete. The corrosion prevention effect can be stably exhibited over a long period of time.

  Note that the present invention is not limited to the above-described embodiments and modifications, and can be implemented in various modes as long as they belong to the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Support bar material 11 End part 12 Soft synthetic resin layer 13 Engagement piece 14 Core material 20 Wiring box (concrete buried object)
21a Bottom wall 21b Side wall 22 Opening 23 Insertion hole 30 Reinforcing bar 31 Binding wire d1 Diameter of core material d2 Thickness of soft synthetic resin layer

Claims (3)

It is formed so that it can be bent in a three-dimensional direction by hand, and in a state where it is attached to a concrete buried object, both ends projecting from the concrete buried object are fixed to reinforcing bars that form the skeleton of the concrete structure. causes supported rebar, a supporting bar member having a bracing strength against erected formwork to form the concrete construction, Ri Na soft synthetic resin layer is formed on the surface thereof,
When the support bar is fixed to the reinforcing bar, the surface of the soft synthetic resin layer is deformed according to the outer surface shape of the binding wire for binding to the reinforcing bar or the reinforcing bar, and the reinforcing bar or the binding wire is A support bar material for a concrete embedded object , wherein the soft synthetic resin layer is formed with a predetermined thickness so as to be fitted into a recess formed on the soft synthetic resin layer . Said soft synthetic resin layer, the supporting bar member of concrete buried object according to claim 1, characterized by being colored to identify the type of such a wiring system. The supporting bar member according to claim 1 or 2, there is provided a method of supporting a concrete buried objects reinforcing bars,
Attaching the support bar to the concrete buried;
Winding the both ends of the support bar material protruding from the concrete buried object around the reinforcing bar;
Fixing the supporting bar material wound around the reinforcing bar and the reinforcing bar with a binding wire,
The reinforcing bar and the binding wire bite into the soft synthetic resin layer of the supporting bar material, and the supporting bar material is in close contact with and in contact with the reinforcing bar and the binding wire.

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