JP2009287234A - Mounting implement for screw reinforcing bar, and its mounting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To require grouting operations or a screw portion for an end of a screw reinforcing bar. <P>SOLUTION: In this mounting implement, a spiral groove 3, into which a spiral protrusive streak M of the screw reinforcing bar T is loosely fitted and which has the same pitch as the spiral protrusive streak M, is engraved on the inner peripheral surface of a mounting implement body 10 which forms a reinforcement insertion hole 2 formed in the center; and a coil material 11 for being housed in a spiral gap S formed of the spiral protrusive streak M and the spiral groove 3 is provided. Thus, when only the coil material 11 is prepared, the spiral groove 3 becomes substantially narrow or the spiral protrusive streak M becomes substantially wide, in the case of the mounting implement body 10 having the spiral groove 3 identical in constitution to that of a grouting-type mounting implement. Accordingly, one of side surfaces of the spiral protrusive streak M is brought into contact with or put into the state of get close to one inner side surface of the opposed spital groove 3, and the other side surface of the spiral protrusive streak M is brought into contact with or put into the state of getting close to other inner side surface of the spiral groove 3 via the coil material 11. Consequently, a grout material or the screw portion is not required. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to, for example, a joint for a reinforcing bar that connects two threaded reinforcing bars as main bars of a column or a beam, a fixing tool attached to an end of the threaded reinforcing bar, and a mounting tool for the screwed reinforcing bar. It relates to the mounting method.

  Conventionally, in the case of a fitting for a threaded reinforcing bar such as a joint for a reinforcing bar or a fixing tool, the outer edge of the threaded reinforcing bar is externally fitted and a grout material is filled in a gap between the threaded reinforcing bar, On the other hand, there can be seen one in which the fixture is integrated (for example, see Patent Document 1).

  The fixing tool shown in FIG. 5 is a fixing tool that is attached to the end of the screw-fushi reinforcing bar. Although the detailed structure is different from that shown in the drawing of Patent Document 1, the basic structure as the fixing tool is the same. Therefore, it is shown for explaining the prior art, and in such a fixture 1, the spiral in the screw-fushi reinforcing bar T is formed on the inner peripheral surface of the fixture 1 that forms the reinforcing bar insertion hole 2 formed in the center. The spiral groove 3 in which the protrusion M can be loosely fitted is formed, and the pitch of the spiral groove 3 is set to the same pitch as that of the spiral protrusion M of the screw-fushi reinforcing bar T, and the grout material filling from the outer surface to the reinforcing bar insertion hole 2 is filled. An injection hole 4 is formed, and a grout material G is filled into the gap between the reinforcing bar insertion hole 2 and the screw fistula rebar T through the injection hole 4 so that the fixture 1 is integrated with the screw fistula rebar T. Yes.

  However, since there are users who are uneasy about integration with the grout material in the above-described fixture 1, there can be seen a fixture with improved integration in the form of a bolt and nut (for example, Patent Document 2).

  The attachment tool shown in FIG. 6 is a fixing tool attached to the end portion of the screw-fushi reinforcing bar, and has a detailed structure different from that described in the drawing of Patent Document 2, but the basic structure as the attachment tool is the same. Therefore, it is shown to explain the prior art, and in such a fixture 1A, the screw portion 5 having an extremely smaller pitch than the spiral protrusion M is formed at the end portion of the screw fistula reinforcing rod T, and the reinforcing bar is inserted. A screw groove 6 that is screwed into the screw portion 10 is formed on the inner peripheral surface of the fixture 1A that forms the hole 2 so that the fixture 1A is screwed and integrated with the screw-type reinforcing bar T.

Japanese Patent No. 3889283 (Claims, FIG. 2) Japanese Patent No. 3512360 (Claim 1, FIG. 1, 3, 5)

  However, in the above-mentioned prior art, in the case of the above-mentioned Patent Document 1, it is necessary to inject the grout material, and the grout material that protrudes excessively or the like must be disposed of as waste. In this case, the screw part must be engraved directly on the end of the threaded reinforcing bar, or the threaded rod must be integrated with the end part by means such as friction welding. There were problems that had to be solved, such as an increase in the number, the screw thread of the screw part being crushed, and dust being caught during installation, making it difficult to mount the fixture.

  The present invention is based on the above prior art, and in view of the problem of requiring a grout injection work or a threaded portion, a spiral protrusion of a screw-fushi rebar is formed on the inner peripheral surface of a fixture body that forms a reinforcing bar insertion hole formed in the center. A spiral groove that can be loosely fitted into the strip is engraved, and the pitch of the spiral groove is set to the same pitch as the spiral projection of the screw-fushi reinforcement, and is formed by the spiral groove on the fixture body side and the spiral projection of the screw-fushi reinforcement. If it is a fixture having a coil material to be accommodated in the spiral gap, the rebar insertion hole and the spiral groove having the same configuration as the fixture using the grout material of the above-mentioned Patent Document 1 can be obtained as long as the coil material is prepared. The width of the spiral groove on the side of the fixture body is practically narrowed or the width of the spiral protrusion on the side of the screw-fushi reinforcement is practically wide, regardless of the presence or absence of the grout material injection hole. One side of the spiral ridge is the opposite spiral groove One inner surface and the other are in contact with or in close proximity to the other inner surface of the spiral groove via the coil material, respectively, and it is possible to satisfy the certainty equivalent to the above-mentioned Patent Document 2, and the grout material Alternatively, the above problem can be solved by eliminating the need for a screw portion.

In short, in the present invention, a spiral groove capable of loosely fitting a spiral protrusion on a screw fistula reinforcing bar is formed on the inner peripheral surface of a fixture main body forming a reinforcing bar insertion hole formed in the center, and the pitch of the spiral groove is set to the screw flange. The pitch is set to the same pitch as the spiral protrusion of the reinforcing bar, and it is accommodated in a spiral gap formed by the spiral groove on the side of the threaded reinforcing bar inserted in the helical groove on the attachment body side and the reinforcing bar insertion hole of the attachment body. Since it has a coil material, the gap between the spiral groove on the fixture main body side and the spiral ridge on the screw-fushi reinforcing bar side can be filled with the coil material, so one side of the spiral groove facing one side of the spiral ridge, for example Even if the fixture body moves in the longitudinal direction of the screw fistula rebar, the inner surface and the other are not in contact with the other inner surface of the spiral groove via the coil material. For example, fixing tools and reinforcing bars The function as a joint can be sufficiently achieved, so that a grout material or a screw portion can be dispensed with. For example, the grout is injected into the fixture body like the fixing device in the prior art described in Patent Document 1 above. Even if a hole is formed, there is no functional problem and it can be used as it is.
Further, the coil material is in contact with one inner surface of the spiral groove and one side surface of the spiral protrusion, and the other side surface of the spiral protrusion is in contact with the other inner surface of the spiral groove. Therefore, the entire one side surface of the spiral protrusion at the screwed end portion of the screw rebar can be brought into contact with one side surface of the spiral groove of the reinforcing bar insertion hole via the coil material. Since the entire other side surface of the spiral protrusion at the threaded end of the reinforcing bar can be brought into contact with the other side surface of the spiral groove of the reinforcing bar insertion hole, the fixture main body is not slightly moved in the longitudinal direction with respect to the threaded reinforcing bar. Therefore, it is possible to ensure the same unity as that of the prior art described in the above-mentioned Patent Document 2, and it is possible to meet the demand of a user who prefers a bolt / nut type fixture.

  After inserting the tip of the coil material into the screw-fushi rebar from the beginning of the end of the spiral space between the spiral protrusions of the screw-fushi rebar, push the coil material in the longitudinal direction of the screw-fushi rebar while rotating the coil material. Attach the coil material to the end so that it is wound, and then screw the end of the threaded reinforcing bar into the reinforcing bar insertion hole in the fixture body. Since it was fitted between the side surface and the coil material, and the fitting main body was screwed into the screw-fushi rebar, it requires a little labor compared to the conventional technique described in Patent Document 2, Using the screw fist bar and the fixing tool described in Patent Document 1, it is possible to achieve the same unity as that of Patent Document 2 simply by adding the coil material, and its practical effect is very large. That.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view showing a mounting state of a fixing tool and a reinforcing bar joint as an example of a screw-fushi reinforcing bar fitting according to the present invention. In such a screw-fushi reinforcing bar fitting, the conventional fitting shown in FIG. Similarly to the fixture 1, a fixture main body 10 in which a spiral groove 3 in which a spiral protrusion M in the screw fistula reinforcing bar T can be loosely fitted is formed on the inner peripheral surface forming the reinforcing bar insertion hole 2, and the fixture main body 10. And a coil member 11 accommodated in a spiral gap S formed by the spiral protrusion M on the side of the threaded reinforcing bar T inserted in the reinforcing bar insertion hole 2.
FIG. 2 is a cross-sectional view showing a mounting state of a joint for a reinforcing bar as an example of the mounting tool for a screw fist rebar according to the present invention. The reinforcing rod insertion hole 2 for inserting both ends E and Ea from both directions is penetrated, and the spiral protrusions M and Ma in the screw fistula reinforcement T and Ta can be loosely fitted on the inner peripheral surface forming the reinforcing rod insertion hole 2. A cylindrical fixture body 10 in which spiral grooves 3 having the same pitch as the spiral protrusions M and Ma of the screw fist rebars T and Ta are formed, and the spiral groove 3 on the fixture body 10 side and the reinforcing bar insertion hole 2 The screw members 11 and 11a are respectively housed in the spiral gaps S and Sa formed by the two threaded reinforcing bars T and the spiral protrusions M and Ma on the Ta side in the inserted state.

  The coil material 11 in FIG. 1 and the coil materials 11 and 11a in FIG. 2 are elastic and elastic, and the spiral direction is the same direction as the spiral protrusions M and Ma, and the outer periphery of the screw fist bar T Wrapped along the spiral space between the spiral ridges M, and one of both inner side surfaces 3a, 3b of the spiral groove 3 on the fixture body 10 side and both side surfaces Na of the spiral ridge M on the screw fist bar T, Nb is in contact with one of the inner surfaces 3a and 3b of the spiral groove 3 on the fixture body 10 side, and the other of both side surfaces Na and Nb of the spiral protrusion M on the screw fist bar T side is in contact with the other of the inner surfaces 3a and 3b. It is said.

This will be specifically described.
[In the case of the fixing device of FIG. 1]
The coil material 11 comes into contact with one inner side surface 3a of the spiral groove 3 on the fixture body 10 side and one side surface Na of the spiral protrusion M on the screw-fushi reinforcing bar T side, and the spiral groove 3 on the fixture body 10 side. The other side surface Nb of the spiral protrusion M on the side of the threaded reinforcing bar T is in contact with the other inner side surface 3b.
[In the case of the reinforcing bar joint in Fig. 2]
The coil material 11 on the one side of the threaded reinforcing bar T is brought into contact with one inner side surface 3a of the spiral groove 3 on the side of the fixture body 10 and one side surface Na of the spiral protrusion M on the side of the threaded reinforcing bar T. The other side surface Nb of the spiral protrusion M on the screw fist rebar T side comes into contact with the other inner side surface 3b of the spiral groove 3 on the main body 10 side, and the coil material 11a on the other screw fushi rebar Ta side The other side surface 3b of the spiral groove 3 on the side and one side surface Na of the spiral protrusion M on the side of the threaded reinforcing bar T are brought into contact with each other, and the screw side of the screw inner surface 3a of the spiral groove 3 on the mounting body 10 side is brought into contact. The other side surface Nb of the spiral protrusion M on the reinforcing bar T side is in a contact state.

Next, the attachment method and operation of the screw-fushi rebar fitting according to the present invention will be described.
(1) Inserting the coil material 11 into the screw-fushi rebar T, inserting the tip of the coil material 11 from the start end of the spiral space between the spiral protrusions M of the screw-fushi rebar T on the end E side, and rotating the coil material 11 The coil material 11 is attached to the end portion E of the screw-bush rebar T by pushing in the longitudinal direction of the screw-bush rebar T (see FIG. 3A).
(2) The end E of the threaded reinforcing bar T is screwed into the reinforcing bar insertion hole 2 in the fixture main body 10 so that the spiral protrusion M of the screwed reinforcing bar T is connected to one inner side surface 3a and the coil material 11 in the spiral protruding line M. As shown in FIG. 1, the fitting body 10 is screwed into the threaded reinforcing bar T (see FIG. 3B).

  Then, at the time of the above (2) step, as shown in FIGS. 1 and 4A, the reinforcing bar of the spiral groove 3 with respect to the side surface Nb opposite to the end E side of the spiral protrusion M of the screwed reinforcing bar T. The inner side surface 3b on the opening side of the insertion hole 2 is in close contact with the inner side surface 3a of the spiral groove 3 opposite to the inner side surface 3b on the insertion opening side of the reinforcing bar insertion hole 2 and The coil material 11 is housed in the gap S between the side surface Na on the end E side, and the coil material 11 is in contact with the inner side surface 3a and the side surface Na.

In the case of the reinforcing bar joint shown in FIG. 2, the coil members 11 and 11a are attached to the end faces E and Ea of the two threaded reinforcing bars T and Ta in the same manner as in the step (1). The two screw-fushi reinforcing bars T and Ta end portions E and Ea are screwed from the openings at both ends of the reinforcing bar insertion hole 2 in the fixture body 10, and the spiral protrusion M of one screw-fushi reinforcing bar T is placed in the spiral protrusion M. The spiral protrusion Ma of the other screw fistula reinforcing bar Ta is advanced between the other inner surface 3b of the spiral protrusion M and the coil material 11a. In this manner, the fixture main body 10 is screwed to the screw fist rebars T and Ta, and the two screw fist rebars T and Ta are connected to obtain the state shown in FIG.
Then, the inner side surface 3b on the insertion opening side of the screw fistula rebar T in the reinforcing bar insertion hole 2 of the spiral groove 3 is in close contact with the side surface Nb opposite to the side surface Na on the end E side of the spiral protrusion M of the screw fistula T. A coil is formed in the gap S between the inner side surface 3a opposite to the inner side surface 3b in the reinforcing bar insertion hole 2 of the spiral groove 3 and the side surface Na on the end E side of the spiral protrusion M of the screw-fushi reinforcing bar T. The material 11 is in the accommodated state, the coil material 11 is in contact with the inner side surface 3a and the side surface Na, and the side surface Nb on the opposite side to the side surface Na on the end Ea side of the spiral protrusion Ma of the screw fistula reinforcing bar Ta. On the other hand, the inner side surface 3a on the insertion opening side of the threaded reinforcing bar Ta in the reinforcing bar insertion hole 2 of the spiral groove 3 is brought into a close contact state, and the inner side surface 3b of the reinforcing bar insertion hole 2 of the spiral groove 3 and the spiral protrusion Ma of the screwed reinforcing bar Ta. Gap between the side surface Na in In S, the coil material 11a is housed, and the coil material 11a is in contact with the inner side surface 3b and the side surface Na.

  That is, in the screw-fushi reinforcing bar attachment shown in FIG. 1, FIG. 2, FIG. 3 (a), FIG. 3 (b) and FIG. 4 (a), The coil members 11 and 11a are accommodated in the spiral groove 3 of the fixture body 10 between the inner surface on the back side in the insertion direction of the screw fist rebars T and Ta. The side surface on the opposite side and the inner side surface on the near side in the insertion direction of the threaded reinforcing bars T and Ta in the spiral groove 3 of the fixture body 10 are in contact with each other.

Further, in the step (1), as shown in FIG. 4B, in some cases, the fixture main body 10 is screwed into the screw fistula reinforcing bar T, and the end portion of the screw fushi reinforcing bar T in the spiral protrusion M is obtained. The inner side surface 3a opposite to the inner side surface 3b on the insertion opening side of the reinforcing bar insertion hole 2 in the spiral groove 3 is in close contact with the side surface Na on the E side, and the inner side surface on the opening side of the reinforcing bar insertion hole 2 in the spiral groove 3 The coil material 11 is housed in the gap S between 3b and the side surface Nb on the opposite side of the end E side of the spiral protrusion M of the threaded reinforcing bar T, and the coil material 11 is placed on the inner side surface 3b and the side surface Nb. It will be in a contact state.
That is, the coil members 11 and 11a are accommodated between the side surface on the insertion end face side of the screw fistors T and Ta and the inner side surface on the near side in the insertion direction of the screw fistula T and Ta in the spiral groove 3 of the fixture body 10. Thus, the side surface on the opposite side to the side surface on the insertion end face side of the threaded reinforcing bars T and Ta and the inner surface on the far side in the insertion direction of the threaded reinforcing bars T and Ta in the spiral groove 3 of the fixture body 10 are brought into contact with each other. .

  It should be noted that one of the inner side surfaces 3a and 3b of the spiral groove 3 on the fixture body 10 side and one of the screw rib rebar T and the spiral projection M on the Ta side and one of both side surfaces Na and Nb of the Ma are in contact with each other. The other of the inner side surfaces 3a, 3b of the spiral groove 3 on the tool body 10 side is in contact with the other of the screw fist rebar T, the spiral projection M on the Ta side, and both sides Na, Nb of Ma, respectively. However, in this case, the fixture main body 10 slightly moves in the longitudinal direction of the threaded reinforcing bar T, but there is no functional problem.

It is sectional drawing which shows the attachment state of the fixing tool as an example of the attachment tool for screw-fushi reinforcing bars which concerns on this invention. It is sectional drawing which shows the attachment state of the joint for reinforcing bars as an example of the attachment tool for screw-fushi reinforcing bars which concerns on this invention. It is a front view which shows the attachment process of the coil material in the attachment process of the attachment for a screw fistula reinforcement. It is a front view which shows the attachment process of the attachment main body in the attachment process of the attachment for screw fistula reinforcing bars. It is a general | schematic expanded view which shows the state where a coil material is located in the back | inner side rather than a spiral protrusion by the positional relationship of a spiral protrusion, a spiral groove, and a coil material. It is a general | schematic expanded view which shows the state in which a coil material is located in the near side rather than a spiral protrusion by the positional relationship of a spiral protrusion, a spiral groove, and a coil material. It is sectional drawing which shows the attachment state of the fixing tool of the conventional grout material injection | pouring type. It is sectional drawing which shows the attachment state of the conventional volt | bolt nut type fixing tool.

Explanation of symbols

2 Reinforcing bar insertion hole 3 Spiral groove
3a, 3b inside surface
10 Fixture body
11 Coil material M, Ma Spiral ridge Na, Nb Side S Clearance T, Ta

Claims (3)

  On the inner peripheral surface of the fixture body that forms the reinforcing bar insertion hole formed in the center, a spiral groove that can be loosely fitted with a spiral protrusion in the screw-fushi reinforcing bar is formed, and the pitch of the spiral groove is set to the spiral protrusion of the screw-fushi reinforcing bar. And a coil material that is housed in a spiral gap formed by a spiral groove on the screw-fushi rebar side inserted in the rebar insertion hole of the fixture body. A screw-fushi rebar fitting characterized by the above.   The coil material is in contact with one inner surface of the spiral groove and one side surface of the spiral protrusion, and the other side surface of the spiral protrusion is in contact with the other inner surface of the spiral groove. The screw-fushi rebar fitting according to claim 1, which is formed as described above.   After inserting the tip of the coil material into the screw-fushi rebar from the beginning of the end of the spiral space between the spiral protrusions of the screw-fushi rebar, push the coil material in the longitudinal direction of the screw-fushi rebar while rotating the coil material. Attach the coil material to the end so that it is wound, and then screw the end of the threaded reinforcing bar into the reinforcing bar insertion hole in the fixture body. A fitting method for a screw-fushi reinforcing bar, wherein the fitting main body is screwed between the side surface and the coil material and the fitting main body is screwed into the screw-fushi reinforcing bar.

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