JP6561470B2 - Reinforcing bar crossing fastener - Google Patents

Description

  The present invention relates to a reinforcing bar crossing fastener that firmly fastens and fixes a reinforcing bar crossing mainly subjected to a high load.

  Conventionally, as a fastener for fixing a reinforcing bar intersection, there is a fitting 4 made up of a detachable surface 9, a rotating surface 10, and an arcuate surface 11. The free end of the metal wire 3 is engraved with a bolt surface 7, and the free end is inserted into the notch groove 13 of the detachable surface 9. A vertical / horizontal strut tying tool that detachably attaches vertical and horizontal struts 1 and 2 is disclosed (for example, see Patent Document 1).

Japanese Utility Model Publication No. 51-112306

However, in the above-described conventional example, the depth of the inner surface of the circular arc surface 11 that contacts the vertical and horizontal struts 1 in the fitting 4 is shallower than the diameter of the vertical and horizontal struts 1, so As shown in FIG. 1 in Document 1, the attaching / detaching surface 9 and the rotating surface 10 of the fitting 4 do not come into contact with the vertical and horizontal columns 2, so that the nut 5 is strongly tightened to the bolt surface 7 of the metal wire 3. As a result, only the attachment / detachment surface 9 and the rotation surface 10 of the fitting 4 are bent, and the fastening strength does not increase.
Therefore, there is a problem that it cannot be used for fastening and fixing the reinforcing bar crossing portion of the reinforcing bar cage disposed in the mold when constructing the reinforced concrete structure particularly requiring strength.

  The problem to be solved by the present invention is to provide a reinforcing bar capable of firmly fastening a reinforcing bar intersection such as a crossing part of a first reinforcing bar and a second reinforcing bar in a reinforcing steel cage placed in a formwork during construction of a reinforced concrete structure. The object is to provide an intersection fastener.

In order to solve the above-mentioned problem, the reinforcing bar crossing fastener according to claim 1,
Consists of one U-bolt and nut having a male thread at both ends, and a fastening plate,
The U-bolt is substantially V-shaped centered on the arc-shaped bent portion in a direction intersecting with the bending direction of the U-shaped bent portion between both male screw portions and the U-shaped bent portion. Bend formation,
The fastening plate has a substantially U-shaped curved portion that comes into contact so as to wrap one of the first reinforcing bars to be fastened, and flange portions that are bent outward at both end edges of the curved portion, Is formed with an insertion hole through which both male screw parts of the U bolt can be inserted,
The U-shaped bent portion of the U-bolt is engaged with one first reinforcing bar to be fastened, and the arc-shaped bent portion is engaged with the other second reinforcing bar to be fastened. The U-bolt male screw portions are inserted into the insertion holes provided in both flange portions of the fastening plate in a state in which the curved portion is brought into contact so as to wrap one of the first reinforcing bars to be fastened. When the nut is screwed and the intersection of the first reinforcing bar and the second reinforcing bar is strongly fastened, the inner depth of the bending part in the fastening plate is set so that both flange parts come into contact with the other second reinforcing bar to be fastened. Is set as a feature.

The reinforcing bar intersection fastener according to claim 2 is the reinforcing bar intersection fastener according to claim 1,
Both flange portions of the fastening plate are inclined in a direction substantially perpendicular to both male screw portions of the U bolt when the first reinforcing bar and the second reinforcing bar are fastened.

In the reinforcing bar intersection fastener according to claim 1, as described above, the U-shaped bent part of the U bolt should be engaged with one first reinforcing bar to be fastened, and the arc-shaped bent part should be fastened. The both male threaded portions of the U bolts are connected to both of the fastening plates in a state where they are engaged with one of the second reinforcing bars and the substantially U-shaped curved portion of the fastening plate is brought into contact with the first reinforcing steel to be fastened. When the nut is inserted into the insertion hole provided in the flange portion and a nut is screwed into the both male screw portions and the intersection of the first reinforcing bar and the second reinforcing bar is strongly fastened, the first of the two flange portions to be fastened By setting the inner depth of the curved portion of the fastening plate so as to abut against the reinforcing bar, the nut is tightened until both flange portions abut against the other second reinforcing bar to be fastened. The crossing part of the 2nd rebar can be made into the state fastened firmly.
Moreover, a nut will also be in the state which is hard to loosen because both flange parts contact | abut to the other 2nd reinforcing bar which should be fastened.
Therefore, it is possible to obtain an effect that a reinforcing bar intersection such as the intersection of the first reinforcing bar and the second reinforcing bar in the reinforcing bar cage disposed in the formwork at the time of construction of the reinforced concrete structure can be firmly fastened.

  In the reinforcing bar intersection fastener according to claim 2, as described above, both flange portions of the fastening plate are arranged in a direction that intersects with both male screw portions of the U-bolt at a substantially right angle when the first reinforcing bar and the second reinforcing bar are fastened. By adopting the inclined configuration, it is possible to stabilize the tightened state of the nut with respect to both male screw portions.

It is a front view which shows the reinforcing bar crossing part fastener of Example 1. FIG. It is a rear view which shows the reinforcing bar crossing part fastener of Example 1. FIG. It is a top view which shows the reinforcing bar crossing fastener of Example 1. FIG. It is a bottom view which shows the reinforcing bar crossing fastener of Example 1. It is a left view which shows the reinforcing bar crossing fastener of Example 1. It is a right view which shows the reinforcing bar crossing fastener of Example 1. It is a side view which shows the use condition of the reinforcing bar crossing fastener of Example 1.

  Embodiments of the present invention will be described below with reference to the drawings.

  In Example 1, as an example 1 of use, in an assembling process of a reinforcing steel cage used for cast-in-place concrete resistance (in a construction / construction site, excavating a predetermined place and driving it into the concrete) The case where the intersection of the first reinforcing bar 4 and the second reinforcing bar 5 is fastened will be described as an example.

  That is, as shown in FIGS. 1 to 7, the reinforcing bar intersection fastener according to the first embodiment includes a single U-bolt 1 and nuts 2 and 2 having male screw portions 11 and 11 at both ends, and a fastening plate 3. It consists of

  More specifically, the fastening plate 3 includes a substantially U-shaped curved portion 31 that comes into contact with the first reinforcing bar 4 to be fastened, and a flange that is bent outward at both ends of the curved portion 31. The flange portions 32, 32 are formed with insertion holes 33, 33 through which the male screw portions 11, 11 of the U-bolt 1 can be inserted.

  The U-bolt 1 has an arc-shaped bent portion 13 between the male screw portions 11 and 11 and the U-shaped bent portion 12 in a direction intersecting with the bending direction of the U-shaped bent portion 12. It is bent in a substantially V shape as the center.

  Further, the U-shaped bent portion 12 of the U-bolt 1 is engaged with one first rebar 4 to be fastened, and the arc-shaped bent portion 13 is engaged with the other second rebar 5 to be fastened. In the state in which the substantially U-shaped curved portion 12 of the fastening plate 3 is brought into contact so as to wrap around the first rebar 4 to be fastened, both male screw portions 11 and 11 of the U bolt 1 are connected to both flanges of the fastening plate 3. When the nuts 2 and 2 are screwed into the male threaded portions 11 and 11 and the intersecting portions of the first reinforcing bar 4 and the second reinforcing bar 5 are firmly fastened through the insertion holes 33 and 33 provided in the portions 32 and 32. Thus, the inner depth of the bending portion 31 in the fastening plate 3 is set so that the flange portions 32, 32 abut against the other second reinforcing bar 5 to be fastened.

  Further, both flange portions 32, 32 in the fastening plate 3 are inclined in a direction substantially intersecting with both male screw portions 11, 11 in the U bolt 1 when the first rebar 4 and the second rebar 5 are fastened. .

  Further, both male screw portions 11, 11 of the U-bolt 1 have a larger screw thread than a normal screw thread and are formed into a round screw, and a longer pitch than the normal pitch.

Next, the operation of the first embodiment will be described.
Since the reinforcing bar crossing fastener of this embodiment is configured as described above, the fastening of the crossing is performed by first engaging the U-shaped bent part 12 of the U bolt 1 with the first reinforcing bar 4. Thus, by rotating the male screw portions 11 and 11 around the engaging portion so as to pass under the second rebar 5, the arc-shaped bent portion 13 is engaged with the lower surface of the second rebar 5.
Next, in a state where the substantially U-shaped curved portion 12 of the fastening plate 3 is brought into contact with the first reinforcing bar 4 so as to wrap both the male screw portions 11, 11 of the U bolt 1, both flange portions 32 of the fastening plate 3, The nuts 2 and 2 are inserted into the insertion holes 33 and 33 and tightened with the nuts 2 and 2, and the flanges 32 and 32 of the fastening plate 3 are in contact with the second rebar 5. At the same time, the bending of the flange portions 32, 32 in the fastening plate 3 is prevented, and at the same time, the firm fastening of the intersection of the first reinforcing bar 4 and the second reinforcing bar 5 is completed.

Next, the effect of the first embodiment will be described.
In the first embodiment, as described above, the U-shaped bent portion 12 of the U bolt 1 is engaged with the first first reinforcing bar 4 to be fastened, and the arc-shaped bent portion 13 is fastened. Both male threaded portions 11 of the U-bolt 1 are engaged with the second rebar 5 and are brought into contact with each other so as to wrap around the first rebar 4 to be fastened with the substantially U-shaped curved portion 31 of the fastening plate 3. 11 is inserted into insertion holes 33 and 33 provided in both flange portions 32 and 32 of the fastening plate 3, and nuts 2 and 2 are screwed into both male screw portions 11 and 11, and the first rebar 4 and the second rebar 5. The inner depth of the bending portion 31 in the fastening plate 3 is set so that both flange portions 32, 32 come into contact with one second rebar 5 to be fastened at the time of strongly fastening the intersecting portion of Narrow until both flange portions 32, 32 abut against the other second reinforcing bar 5 to be fastened. By tightening the bets 2,2, it is possible to state that intersection entered strongly the first reinforcing bar 4 second reinforcing bar 5.

Moreover, when both flange parts 32 and 32 contact | abut to the other 2nd reinforcing bar 5 which should be fastened, the nuts 2 and 2 will also be in the state which is hard to loosen.
Therefore, it is possible to obtain an effect that it is possible to firmly tighten the reinforcing bar intersections such as the intersection of the first reinforcing bar 4 and the second reinforcing bar 5 in the reinforcing bar cage disposed in the formwork when the reinforced concrete structure is constructed.

  Further, both flange portions 32, 32 in the fastening plate 3 are inclined in a direction that intersects the male screw portions 11, 11 in the U-bolt 1 at a substantially right angle when the first rebar 4 and the second rebar 5 are fastened. By doing so, the tightening state of the nuts 2 and 2 with respect to the male screw portions 11 and 11 can be stabilized.

Further, the male screw portions 11 and 11 are formed into a round screw with a larger screw thread than a normal screw thread, and the nut 2 with respect to the male screw portions 11 and 11 is formed with a longer pitch than the normal pitch. The screwing of 2 is performed smoothly and quickly.
Therefore, the efficiency of field work can be improved.

  Although the present embodiment has been described above, the present invention is not limited to the above-described embodiment, and design changes and the like within a scope not departing from the gist of the present invention are included in the present invention.

  For example, in the embodiment, when the crossing portion is fastened in the assembling process of the reinforcing steel cage used for cast-in-place concrete resistance (excavation of a predetermined place at a construction / construction site and driving into it) However, it is possible to firmly fasten all the intersecting portions where two or more reinforcing bars intersect.

DESCRIPTION OF SYMBOLS 1 U bolt 11 Male thread part 12 U-shaped bending part 13 Arc-shaped bending part 2 Nut 3 Fastening plate 31 Substantially U-shaped bending part 32 Flange part 33 Insertion hole 4 1st reinforcing bar 5 2nd reinforcing bar

Claims (2)

Consists of one U-bolt and nut having a male thread at both ends, and a fastening plate,
The U-bolt is substantially V-shaped centered on the arc-shaped bent portion in a direction intersecting with the bending direction of the U-shaped bent portion between both male screw portions and the U-shaped bent portion. Bend formation,
The fastening plate has a substantially U-shaped curved portion that comes into contact so as to wrap one of the first reinforcing bars to be fastened, and flange portions that are bent outward at both end edges of the curved portion, Is formed with an insertion hole through which both male screw parts of the U bolt can be inserted,
The U-shaped bent portion of the U-bolt is engaged with one first reinforcing bar to be fastened, and the arc-shaped bent portion is engaged with the other second reinforcing bar to be fastened. The U-bolt male screw portions are inserted into the insertion holes provided in both flange portions of the fastening plate in a state in which the curved portion is brought into contact so as to wrap one of the first reinforcing bars to be fastened. When the nut is screwed and the intersection of the first reinforcing bar and the second reinforcing bar is strongly fastened, the inner depth of the bending part in the fastening plate is set so that both flange parts come into contact with the other second reinforcing bar to be fastened. Reinforcing bar crossing fastener, characterized in that is set. In the reinforcing bar crossing fastener according to claim 1,
Both flange parts in the said fastening plate are inclined in the direction which cross | intersects the both male screw parts in a U bolt at a substantially right angle at the time of fastening of a 1st reinforcing bar and a 2nd reinforcing bar, The reinforcing bar crossing part fastener characterized by the above-mentioned.

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