JP2009002076A - Fixture for screw reinforcing iron bar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixture which facilitates movement of a screw reinforcing iron bar with respect to the axial direction and which can be fixed on the screw reinforcing iron bar in an arbitrary place as appropriate with simple operation. <P>SOLUTION: The fixture has a sleeve-shaped body 2 having an opening 4 of which the diameter is larger than the outer diameter of the knot-forming part 73 of the screw reinforcing iron bar. Then a projection 5 projected in the inner peripheral direction is formed on the inner periphery of the opening of the body 2. By rotating the screw reinforcing iron bar 70 inserted in the opening 4 and the body 2 in the relatively opposite direction, displacement is performed between the engagement position where the projection 5 is engaged between the spiral knots 71[refer to Fig. 6 (A)] and the movable position positioned on the outer periphery of the plane parts 72, 72 [refer to Fig. 6 (B)], thus movement and fixation can be easily performed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fitting for a reinforcing bar (referred to as “screw reinforcing bar” in the present invention) called a “screw reinforcing bar” or a “screw reinforcing bar” having a spiral node formed on its outer periphery. The present invention relates to a fixture that is attached to a screw rebar and is used to fix the screw rebar to another member or to fix the other member to the screw rebar.

  In foundation work, deformed reinforcing bars, which are rod-shaped steel members with rolled irregularities called ribs and nodes, are generally used as reinforcing bars embedded in concrete structures. Yes.

  In such deformed reinforcing bars, for example, in order to connect a plurality of deformed reinforcing bars in the length direction, the aforementioned threaded reinforcing bars in which the aforementioned ribs or nodes are spirally provided on the outer periphery of the reinforcing bars are used. A threaded screw formed on the outer periphery of the threaded reinforcing bar is screwed with one end of a cylindrical coupler formed on the inner periphery to the end of one threaded reinforcing bar. By screwing the end of the two to the other end of the coupler, the ends of the two threaded reinforcing bars can be easily connected (see Patent Document 1).

  When attaching other members to the outer periphery of the threaded reinforcing bar, weld other members directly to the threaded reinforcing bar, or weld a connector for attaching other members, etc. In general, however, a method for fixing the outer periphery of the threaded reinforcing bar and other members without welding is also proposed. As an example, the screw head of the steel pipe pile 90 is screwed without welding. As a connector 100 that can attach the reinforcing bar 70, a flange-like mounting part 102 having a bolt hole 103 is provided on a cylindrical part 101 provided with an internal thread to be screwed with the threaded reinforcing bar 70. The part 102 is bolted to the outer periphery of the pile head and a screw rebar is screwed to the inner periphery of the cylindrical part 101 so that the screw rebar 70 can be attached to the pile head without welding. (Patent) Document 2: see FIG. 13).

Prior art document information of the present invention includes the following.
JP 2003-278316 A Japanese Patent Laid-Open No. 10-245855

  In the screw rebar 70 configured as described above, the end portions of the screw rebar 70 can be connected relatively easily by using a coupler or the like as described above. There are the following problems when trying to attach other members to other locations.

  In the method of welding another member directly to the outer periphery of the screw rebar 70, or directly welding a connector for fixing the other member to the outer periphery of the screw rebar 70, an appropriate method on the outer periphery of the screw rebar 70 is used. Although it is convenient in that these can be installed in any place, once installation is completed, the installation position cannot be moved even by fine adjustment, and careful attention is required for installation. In addition, accuracy and skill are required.

  In addition, since this type of screw rebar bends at a length of 10 m or more, the work of attaching a plurality of other members in the length direction of the screw rebar required extremely complicated work.

  When using high strength steel screw rebars 70, such high strength steels can be strengthened by microstructuring and control of precipitates by heat treatment in the manufacturing process and temperature control at that time. In general, when welding is performed directly on the threaded rebar 70, the structure and structure given for high strength in this way are affected by the heat during welding. In many cases, it disappears. As a result, the strength in the welded portion is reduced, and breakage or the like is likely to occur through the welded portion.

  On the other hand, like the connector 100 introduced as Patent Document 2, a cylindrical portion 101 in which a female screw that is screwed into the screw rebar 70 is formed on the inner periphery is provided, and the screw rebar 70 is provided in the cylindrical portion 101. When it is configured to be attached to the outer periphery of the screw rebar 70 relatively easily without performing welding or the like by screwing (see FIG. 13), it can be attached without welding. As a result, even when the screw rebar 70 is a high-strength steel, problems such as a decrease in strength due to heat during welding do not occur.

  In addition, until the position is fixed by injecting a krout, etc., it can be moved to make fine adjustments to the mounting position. It can be solved.

  However, in the connection tool having the above-described configuration, if the connection tool 100 is to be moved in the axial direction of the screw rebar 70, the connection tool 100 is first screwed into the end of the screw rebar 70, and then the connection tool and the screw rebar 70 are connected. While rotating in the opposite direction, it is necessary to move by a small distance by the meshing of the helix and attach it to the target position. This work is complicated, and especially in the vicinity of the center of the long screw rebar 70. It takes a lot of time and labor to move the connector to the position.

  Therefore, the present invention has been made in order to eliminate the above-described drawbacks of the prior art, and employs a configuration in which other members are attached to the outer periphery of the screw rebar 70 by a fixture, and therefore, the adverse effects of direct welding are eliminated. Although it can be avoided, it is easy to move the fixture relative to the axial direction of the screw rebar 70, and it can be easily fixed to an appropriate place on the outer periphery of the screw rebar 70, and once attached. It is an object of the present invention to provide a fixture that can change its mounting position even after completion of the above.

In order to achieve the above object, the fixture 1 for the threaded rebar 70 of the present invention comprises:
For example, excluding the cylindrical flat portions 72 and 72 having a predetermined length having flat portions 72 and 72 that form parallel planes facing each other in the diametrical direction and formed by continuously cutting the outer periphery of the cylindrical shape in the length direction. A fixture 1 that is attached to the outer periphery of a threaded reinforcing bar 70 that includes node forming portions 73 and 73 having spiral nodes 71 formed in a predetermined spiral orbit on the outer periphery,
The knot forming portions 73 and 73 have an opening 4 formed with a large diameter with respect to the outer diameter of the screw rebar 70, and a sleeve-like main body 2 that rotatably accommodates the screw rebar 70;
Relative rotation of the screw rebar 70 and the main body 2 when the screw rebar 70 is accommodated causes the screw 2 to be fitted between the spiral nodes 71 and relative to the axial direction of the screw rebar 70. And the relative position of the main body 2 relative to the axial direction of the screw rebar 70 located on the outer periphery of the flat portions 72 and 72 of the screw rebar 70. A projecting portion 5 that is relatively displaced between possible movable positions (see FIG. 6B) is provided in the opening 4 of the main body 2 in the inner circumferential direction. ).

  The fixture 1 having the above-described configuration may further include a fixing piece 6 that is press-fitted between the inner periphery of the opening 4 of the main body 2 and the flat portion 72 of the screw rebar 70 at the locking position ( Claim 2).

  Furthermore, it is good also as a structure which provided the attaching part 3 for attaching another member to the said main body 2 (Claim 3).

  From the configuration of the present invention described above, according to the fixture 1 of the present invention, the following remarkable effects can be obtained.

  By adjusting the positional relationship between the movable position and the locking position by rotating the screw rebar 70 and the main body 2 in a relatively opposite direction, the fixture 1 in the movable position (see FIG. 6B). Can be moved in the axial direction of the screw rebar 70, and the fixture 1 in the axial direction of the screw rebar 70 is rotated at a position arbitrarily moved to a locking position (see FIG. 6A). Thus, it is possible to obtain an attachment that can be attached to an arbitrary position on the outer periphery of the screw rebar 70 without welding and that can be easily moved and locked.

  The attachment of the other member to the fixture 3 may be performed by, for example, welding the other member directly on the outer periphery of the sleeve-like main body 2 described above. For example, an ear for attaching the other member to the main body 2 may be used. A mounting portion 3 such as a piece is provided, and other members are attached via the mounting portion 3. For example, by providing a bolt hole 31 or the like in the mounting portion 3, the main body 2 and the other members It was possible to obtain the fixture 1 capable of attaching other members by a simpler method, regardless of the welding or the like.

  Further, in the locking position [see FIG. 6 (A)], the fixing piece 6 is press-fitted between the inner periphery of the opening 4 of the main body 2 and the flat portion 72 of the screw rebar 70. Can be fixed so that the screw rebar 70 and the fixture 1 do not rotate in the opposite directions by the press-fitting of the fixing piece 6, thereby the attachment position of the fixture 1 in the axial direction of the screw rebar 70. Could be fixed.

  Next, embodiments of the present invention will be described below with reference to the accompanying drawings.

Screw Reinforcing Bar Prior to describing the fixture 1 of the present invention, first, the configuration of the screw reinforcing bar 70 to which the fitting 1 is attached will be described.

  As shown in FIG. 12, the screw rebar 70 to be attached to the fixture 1 of the present invention has a node (spiral node 71) formed on the outer periphery thereof on a common spiral track over the entire length of the screw rebar 70. When a nut or the like is screwed from one end side of the screw rebar 70 and rotated, the nut screwed to the outer periphery of the screw rebar 70 moves in the axial direction of the screw rebar 70 and finally. Can be moved to the other end.

  A part of the outer periphery of the threaded reinforcing bar 70 is notched, and a pair of parallel plane parts 72 and 72 are formed. The plane parts 72 and 72 form a threaded reinforcing bar on a head part such as a wrench. By inserting 70, the screw rebar 70 can be clamped and fixed without rotating in the wrench head.

  In the present specification, as described above, in the outer peripheral portion of the screw rebar 70, the pair of plane portions formed as described above are referred to as “plane portions” and the spiral portion described above is excluded except for the portions where the plane portions are formed. A portion where a node is formed will be described as a “node forming portion”.

Attachment The attachment 1 of the present invention is used for the screw rebar 70 as described above, and is attached to the screw rebar 70 and serves as a base for attaching other members to the screw rebar 70. , A sleeve-like main body 2 that is attached to the outer periphery of the screw rebar 70 by inserting the screw rebar 70 into the opening 4 is provided. In the embodiment shown in FIGS. A mounting portion 3 for mounting other members is formed so as to protrude from the main body.

  In the embodiment shown in FIGS. 1 to 4, ear pieces 3, 3 projecting in opposite directions on the same plane from both ends of the cylindrical body 2 are provided as the mounting portion 3. , 3 so that other members can be attached, but the attachment portion 3 is not necessarily provided, and as described above, for example, by directly welding to the outer periphery of the sleeve-like body 2, for example. Other members may be attached, and the configuration is not limited to the illustrated embodiment.

  The sleeve-shaped main body 2 is formed so that its inner diameter is slightly larger than the outer diameter of the screw rebar 70 in the aforementioned node forming portion 73, and the screw rebar 70 is inserted into the opening 4 of the main body 2. It is configured to be able to.

  As shown in FIG. 2, a protrusion 5 protruding in the inner peripheral direction is provided on the inner periphery of the main body 2, and the protrusion 5 is fitted between the spiral nodes 71 formed in a spiral shape. Thus, the position of the fixture 1 in the length direction of the screw rebar 70 is fixed, and the movement of the screw rebar 70 in the length direction of the fixture 1 is restricted.

  When the protrusions 5 are provided at a plurality of locations as shown in FIGS. 1 to 4, the plurality of protrusions 5 are arranged so as to have the same angle as the twist angle of the spiral node 71 formed on the screw rebar 70. Thus, all the protrusions 5 formed and formed are simultaneously fitted into the space between the spiral nodes 71 of the screw rebar 70 externally fitted to the part.

  In the present embodiment, the shape of the protrusion 5 is, for example, a circle in the planar shape shown in FIG. 3, but instead of this configuration, the protrusion 5 bulges in the inner circumferential direction as shown in FIG. The protrusion may be formed in any shape as long as it can be fitted in each interval between the spiral nodes of the screw rebar 70 and the movement of the screw rebar 70 in the axial direction can be restricted. good.

  As shown in FIGS. 2 and 6, the protrusion 5 is not provided over the entire circumference of the main body 2, but is provided intermittently in the circumferential direction, so that the fixture 1 can be provided. By rotating the screw rebar 70 around the screw rebar 70 in a relatively opposite direction at a predetermined angle, the protrusion 5 is fitted between the spiral nodes 71 (see FIG. 6A) and on the outer periphery of the flat portion. It is configured to be able to be displaced between the movable positions (see FIG. 6B).

  In the present embodiment, as shown by a two-dot chain line supplementarily described in FIG. 6 (A), the main body 2 of the fixture 1 is rotated 90 degrees in the circumferential direction around its axis. When the projections 5 are divided into four equal intervals, the projections 5 are adjusted so that the projections 5 are formed only within the range of a pair of opposing sections. When the screw rebar 70 is rotated 90 degrees about the shaft center from the locking position fitted between the nodes 71, the projecting portion comes out from between the nodes of the screw rebar 70, and the outer peripheral position of the plane portion 72. By moving relative to each other, the engagement between the spiral nodes 71 of the screw rebar 70 and the protrusion 5 is released, and the fixture 1 can be moved in the axial direction of the screw rebar 70. Yes.

  The sleeve-like main body 2 of the fixture 1 can be formed by, for example, bending a metal plate and rounding it into a cylindrical shape, and in this way, the state of the metal plate before being processed into a cylindrical shape. Is shown in FIG.

  In the embodiment shown in FIG. 7, a hemispherical projection that becomes the protrusion 5 is formed on a metal plate that integrally forms the rectangular portion that becomes the main body 1 and the ear piece 3 that becomes the attachment portion. Formed by press molding, etc., this metal plate is curved in a cylindrical shape in the length direction, welded by butting two sides forming both ends in the length direction, and joined by other methods to form a cylindrical shape .

  As shown in FIGS. 3 to 5, in the above-described ear piece 3, in this embodiment, a long hole-shaped bolt hole 31 is formed with the protruding direction of the ear piece 3 as the length direction. The bolt inserted through the hole 31 is inserted into a bolt hole formed in another member to be attached and a nut or the like is screwed to the tip portion or directly welded to the other member to be attached. The mounting tool 1 can be attached to the other member by, for example, screwing into the nut or by screwing the nut into a bolt erected on the other member.

〔how to use〕
An example of how to use the fixture 1 described with reference to FIGS. 1 to 7 will be described with reference to FIGS. 8 and 9.

  The reinforcing bar 80 shown in FIG. 8 is inserted into the hollow space of a steel pipe pile in the axial direction and embedded in concrete to serve as reinforcing bars. In the embodiment, four screw rebars 70 are used, and the hoop bars 81 are arranged on the outer peripheral side of the plurality of screw rebars 70 to bundle them, and the inner peripheral side of the plurality of screw rebars 70. In FIG. 2, the flat bars 82 connected to the threaded reinforcing bars 70 are alternately arranged, thereby forming a reinforcing bar rod 80 having a cylindrical shape as a whole.

  The above-mentioned flat bar 82 is formed in an endless annular shape by connecting both longitudinal ends of a strip-shaped metal plate. In order to attach the screw rebar 70 on the outer periphery of the flat bar 82, FIGS. The above-described fixture 1 described with reference to FIG.

  When the rebar rod 80 is assembled by the fixture 1, the fixture 1 is placed at a predetermined position on the outer periphery of the flat bar 82 in advance via the ear piece 3, and in the illustrated embodiment, 90 in the circumferential direction. Install at regular intervals.

  Since the bolt hole 31 formed in the ear piece 3 is formed in a long hole shape, when the bolt is loosened, the fixture 1 is mounted on the flat bar 82 in accordance with the length of the bolt hole 31. It is also possible to make a configuration such that the mounting position can be adjusted.

  Then, the screw rebar 70 passed through the opening of the hoop bar 81 is inserted into the main body 2 of the fixture 1 attached to the outer periphery of the flat bar 82 so that the protrusion 5 and the spiral node 71 do not interfere with each other. [FIG. 9A], this operation is repeated and a predetermined number of hoop muscles 81 and flat bars 82 are attached.

  If necessary, the threaded reinforcing bar 70 and the hoop bar 81 are bound with a steel wire or the like and fixed so that the mounting position does not deviate.

  As described above, when the above-described screw rebar 70 inserted into the main body 2 of the fixture 1 is rotated by 90 degrees using a wrench or the like, the spiral nodes 71 formed on the outer periphery of the screw rebar 70 are connected. Further, the protrusion 5 swelled on the inner periphery of the sleeve-shaped main body of the fixture 1 is fitted, and the screw rebar 70 cannot be extracted from the main body 2 of the fixture 1 [FIG. ]].

  In this way, with the spiral node 71 of the screw rebar 70 and the protrusion 5 of the fixture 1 fitted, a metal plate or the like is provided between the flat portion 72 of the screw rebar 70 and the inner periphery of the main body of the fixture 1. The constituted fixing piece 6 is inserted, and thereby the screw rebar 70 is prevented from rotating, and the screw rebar 70 locked to the fixture 1 is prevented from coming off [FIG. 9C].

  It is good also as what fixes more firmly, for example by inject | pouring grout into the opening 4 of the fixture 1 by which rotation prevention was carried out in this way as needed.

  In this way, the screw rebars 70 corresponding to the number used are fixed in the main body 2 formed in the sleeve shape of the fixture 1 so as not to be pulled out, and the rebar assembling as shown in FIG. 8 is completed and assembled. The steel bar 80 is inserted into the hollow space of the hollow pile, embedded in the concrete in the hollow space and integrated, and used as a reinforcing material for the hollow pile.

  In this way, by attaching the flat bar 82 to the screw rebar 70 via the fixture 1, both of them can be fixed without welding, so that the screw rebar 70 is not affected by the welding heat. Even if the screw rebar 70 is made of high-strength steel, the strength does not decrease at the joint.

  Further, when the fixture 1 is moved in the axial direction of the screw rebar 70, it is not necessary to continuously rotate the screw rebar 70 or the fixture 1 for a long time, so that the attachment is easy.

Other Embodiments In the fixture 1 described above, the above-mentioned ear piece 3 is provided as an attachment portion for fixing the sleeve-like main body 2 and other members attached to the screw rebar 70, and Although the example which formed this ear piece 3 integrally with the said main body 2 was demonstrated, the structure of the said attaching part 3 which attaches another member with respect to the screw rebar 70 was mentioned above with reference to FIGS. The configuration of the ear piece 3 is not limited, and various configurations can be appropriately changed according to the implementation such as the shape of a member attached to the screw rebar 70 and the use of the screw rebar 70.

  The fixture 1 shown in FIG. 10 exemplifies a use form for temporarily fixing the screw rebar 70 to the upper edge of the steel pipe pile 90. The screw rebar 70 attached to the pile head in this way is It is used to connect the foundation pile and the foundation by projecting into the foundation of the structure built on the pile head and connecting with the reinforcing bars embedded in the foundation.

  When a reinforcing bar embedded in the foundation of a structure constructed on the pile head is attached to the pile head of the steel pipe pile, as shown in FIG. It is attached by mounting and welding a relatively short steel pipe pile 90 with the above-mentioned reinforcing bars attached to the edge.

  As described above, when the short steel pipe pile 90 constituting the pile head is attached, the steel pipe pile 90 and the reinforcing bar 80 inserted into the steel pipe pile 90 are both suspended by a crane or the like. It is inserted into a finished steel pipe pile, and the pile head is reinforced by placing raw concrete in this pile head. All of the reinforcing bars protruding upward are formed on the upper edge of this steel pipe pile 90. If the reinforcing bar 80 is inserted into the steel pipe pile 90 in advance, the reinforcing bar already attached interferes with the reinforcing bar 80 and the insertion work becomes difficult. Alternatively, a part (two of the four in the embodiment shown in FIG. 11) is temporarily fixed with the fixture 1 of the present invention without welding, and when the reinforcing bar 80 is inserted. Remove this or shift the position, and then temporarily fix it again. By welding, and configured to be capable of performing the insertion of the reinforcing bar cage for steel pipe 90 relatively easily.

  Thus, the fixture 1 of the present embodiment for temporarily fixing the reinforcing bars to the upper edge of the steel pipe is the same as the fixture 1 of the embodiment described with reference to FIGS. 1 to 7 as shown in FIG. Although common in that the main body 2 having the same configuration as that of the main body 2 is provided, in the mounting tool 1 described with reference to FIGS. On the other hand, in the fixture 1 of this embodiment, the attachment portion 3 is formed by a metal plate welded to the main body. ing.

  In this embodiment, the attachment portion 3 is formed between the fixing plate 32 welded to the outer periphery of the main body 2 and the parallel plate 33 parallel to the fixing plate 32 with respect to the two plate bodies. Are connected to each other by connecting plates 34 that are orthogonal to each other, and the whole is formed into an angle, and an opening edge in the pile head of the steel pipe pile 90 can be inserted between the threaded reinforcing bar 70 inserted into the main body 2 and the parallel plate 33. (See FIG. 10).

  As described above, instead of the illustrated structure in which the sleeve-shaped main body 2 is directly welded to the parallel plate 33 of the mounting portion 3, the main body is similar to the mounting tool 1 described with reference to FIGS. It is also possible to form an ear piece that protrudes from the edge of the two holes and bolt it to the fixing plate 32 through a bolt hole 31 formed in the ear piece.

  A bolt hole 35 is formed in the parallel plate 33 of the attachment portion 3 attached to the main body 2 as described above, and a tip projects into the bolt hole 35 toward the screw rebar 70. The bolt 36 is inserted or screwed together, the inner periphery of the steel pipe-made pile is pressed with the tip of the bolt 36, and the thickness of the steel pipe is sandwiched between the bolt tip and the threaded rebar 70, so that On the other hand, the screw rebar 70 is configured to be temporarily fixed.

  The bolt hole 35 formed in the parallel plate 33 may be welded with a nut corresponding to the position of the bolt hole 35, or the nut is screwed from the projecting end side of the bolt 36. And you may comprise so that retraction of a nut may be controlled by contact | abutting with this nut and the parallel plate 33, and this may be contact | abutted to the outer peripheral surface of a ready-made pile.

  In this way, the screw rebar 70 temporarily fixed to the upper end opening of the steel pipe pile head by the fixture 1 of the present invention can be easily attached or detached by tightening or loosening the bolt 36, or the attachment position can be moved. In addition, the screw rebar 70 inserted into the main body 2 is rotated 90 degrees from the locked state in which the protruding portion 5 bulging from the inner periphery of the main body 2 is fitted between the spiral nodes 71. Then, when the protrusion 5 is in a state of being dropped from between the spiral nodes 71, the screw rebar 70 can be moved in the axial direction, and the adjustment of the protruding length of the screw rebar 70 is relatively easy. .

  As described above, the screw rebar 70 is welded to the outer periphery of the steel pipe in a state in which the protruding length of the screw rebar 70 is adjusted and the attachment position with respect to the upper end edge of the steel pipe is determined and temporarily fixed.

  After the screw rebar 70 is welded to the steel pipe, the fixture 1 may be removed and recovered, or a concrete operation performed thereafter may be performed while the fixture is attached.

The front view of a fixture. The left view of a fixture. The top view of a fixture. The bottom view of a fixture. The top view of the fixture which shows the example of a change of a protrusion. It is sectional drawing of the axis orthogonal direction of the fixture in the attachment state of a screw reinforcement, (A) shows a latching position and (B) shows a movable position, respectively. The top view of the metal plate used as a fixture by a bending process. The perspective view of the reinforcing bar cage assembled using the fixture of the present invention. It is explanatory drawing of the attachment process of a fixture with respect to a screw reinforcement, (A) is a process of inserting a screw reinforcement in a fixture, (B) is a process of rotating a screw reinforcement to a stop position, (C) is rotated by a fixed piece. Step of locking. Explanatory drawing which shows the use condition of another fixture of this invention. Explanatory drawing which shows the construction state of pile head reinforcement using the fixture of FIG. It is explanatory drawing of a screw reinforcement, (A) is a front view, (B) is the BB sectional drawing of (A). Explanatory drawing which shows the use condition of the conventional connector.

Explanation of symbols

1 Fixture 2 Main body (of the fixture)
3 mounting part (ear piece or metal plate)
31, 35 Bolt hole 32 Fixing plate 33 Parallel plate 34 Connecting plate 36 Bolt 4 Opening hole 5 Protruding portion 6 Fixing piece 70 Screw rebar 71 Spiral node 72 Planar portion 73 Node forming portion 80 Reinforcing bar 81 Hoop bar 82 Flat bar 90 Steel pipe pile 100 connector 101 cylindrical portion 102 mounting portion 103 bolt hole

Claims (3)

A screw rebar having a node forming portion in which a spiral node is formed in a predetermined spiral trajectory on the outer periphery of the cylinder excluding the plane portion of a cylinder having a predetermined length having a plane portion forming a parallel plane opposed in the diameter direction. A fitting attached to the outer periphery thereof,
A sleeve-shaped main body having a hole formed in a large diameter with respect to the outer diameter of the threaded reinforcing bar in the node forming portion and rotatably accommodating the threaded reinforcing bar;
When the screw rebar is housed, the screw rebar and the main body are rotated in a relatively opposite direction to fit between the spiral nodes to restrict relative movement of the main body with respect to the axial direction of the screw rebar. A protrusion that is positioned between the locking position and the outer periphery of the flat portion of the screw rebar and that is movable between the movable position that enables the relative movement of the main body with respect to the axial direction of the screw rebar is disposed in the opening of the main body. A screw rebar fixture characterized by protruding in the inner circumferential direction.   The screw rebar fixture according to claim 1, further comprising a fixing piece that is press-fitted between the inner periphery of the hole in the main body at the locking position and the flat portion of the screw rebar.   3. The screw rebar mounting tool according to claim 1, further comprising a mounting portion for mounting another member on the main body.