JP2005146686A - Reinforcement fastener - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide reinforcement fastener capable of conveniently using for mutually connecting two parallel reinforcements when assembying these reinforcements. <P>SOLUTION: The reinforcement fastener is composed of a pair of clamping pieces 3, 4 openably/closably connected through a hinge part 5 at the end part and a fastening screw means 2 installed between both clamping pieces 3, 4 for closing both clamping pieces 3, 4 in the mutually approaching direction. In the more loose end position of the clamping piece than fastening screw means 2 of the mutually facing inside fastening screw means 2 of both clamping pieces 3, 4 recesses 17, 18 in which the respective outsides of two parallelly adjoining reinforcements 19, 20 are constituted so as to be fittted to each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a reinforcing bar fastener used for assembling a reinforcing bar when a reinforced concrete structure is constructed.

As a reinforcing bar fastener used for assembling reinforcing bars, a reinforcing bar fastener that fastens two reinforcing bars in a state in which end portions are parallel to each other is known. Conventionally known fasteners for parallel reinforcing bars are, for example, as described in Patent Document 1, in a direction in which a portal-shaped (U-shaped) fastener main body and the left and right sandwiching pieces of the main body approach each other. In use, first remove the bolt nut from the main body, put the main body on the fastening part of the parallel rebar, and then insert the bolt nut between the both side plates of the main body again. In the state where the parallel reinforcing bars are sandwiched between the main body and the bottom plate portion, the bolts and nuts are tightened to pull the main body side plate portions together, and the parallel reinforcing bars sandwiched therebetween are fastened.
JP 2002-81171 A

  In the configuration of the conventional reinforcing bar fastener as described above, it is necessary to once remove the two parts of the bolt and nut from the main body in use, and the two parts of the bolt and nut that have been removed after the main body is put on the fastening portion of the parallel reinforcing bar. Since it had to be attached to the main body and tightened again, it took time and effort, and the work could not be performed efficiently.

  An object of the present invention is to provide a reinforcing bar fastener capable of solving the conventional problems as described above, and when its means is shown with reference numerals of embodiments to be described later, one end portion is shown. Is connected between the pair of sandwiching pieces 3 and 4 in order to close the pair of sandwiching pieces 3 and 4 in the approaching direction. Each of the two rebars 19 and 20 arranged in parallel with each other at a position closer to the clamping piece free end than the fastening screw means 2 inside the both clamping pieces 3 and 4 facing each other. Concave portions 17 and 18 that are fitted on the outside are formed.

  In carrying out the present invention having the above-described configuration, as described in claim 2, each sandwiching piece 3, 4 is formed by bending an iron plate into a cross-sectional groove shape with an inner opening, and the recesses 17, 18 are Cuts can be formed from the inner edges of the left and right side plate portions 11a to 12b of each sandwiching piece 3 and 4. In this case, as described in claim 3, the sandwiching pieces 3, 4 are integrally connected to both the opposing plate portions 9, 10 of the strip-like plate that is continuous in a gate shape and the opposing plate portions 9, 10. Further, the hinge portion 5 can be constituted by the connecting plate portion 7 which is constituted by the left and right side plate portions 11a to 12 and which connects the sandwiching pieces 3 and 4 of the belt-like plate. Furthermore, as described in claim 4, the connecting plate portion 7 of the strip-shaped plate constituting the hinge portion 5 can be provided with a hole 8 for reducing the bending strength.

  Further, as described in claim 5, the fastening screw means 2 includes a screw hole 13 provided in one clamping piece 3 and a long hole extending in the length direction of the clamping piece provided in the other clamping piece 4. 15 and a bolt 16 which is screwed into the screw hole 13 and the head portion 16a abuts against the outer surface of the other holding piece 4. In this case, as described in claim 6, the elongated hole 15 has an arcuate protruding portion formed on the other sandwiching piece 4 so as to protrude in an arc shape along at least the length direction of the elongated hole 15. 14 can be provided.

  Furthermore, as described in claim 7, the hinge portion 5 protrudes from one end portion of the both sandwiching pieces 3 and 4, and a pair of projecting plate portions 23 and 24 adjacent to each other in the opening / closing direction of the both sandwiching pieces 3 and 4. And a connecting tool 25 that connects both projecting plate portions 23 and 24 so as to pass through in the opening and closing direction of both sandwiching pieces 3 and 4, and play between the connecting tool 25 and both projecting plate portions 23 and 24. Thus, both the sandwiching pieces 3 and 4 can be configured to be opened and closed.

  According to the reinforcing bar fastener according to the present invention having the above-described configuration, with the fastening screw means loosened, the fastening is performed so that the fastening position of the parallel reinforcing bars is fitted between the pair of holding pieces outside the fastening screw means. Place the fasteners on the fastening points of the parallel reinforcing bars and tighten the fastening screw means with the parts of the parallel reinforcing bars fitted into the recesses inside the holding pieces to close the two fastening pieces of the fastener. By moving, each of the parallel reinforcing bars can be fastened to each other in a state where the parallel reinforcing bars are fitted in the recesses inside the holding pieces. Therefore, it is not necessary to remove or reattach the fastening screw means as in the prior art, and the fastening operation of the parallel reinforcing bars can be performed easily and efficiently.

  In addition, according to the structure of Claim 2, each sandwiching piece can be given sufficient strength to the sandwiching piece while being constructed with a relatively thin steel plate in a lightweight and inexpensive manner. Reinforcing bars can be fastened at two locations separated by the width, so that the parallel reinforcing bars can be securely fastened while being held in a parallel posture. In this case, according to the configuration of the third aspect, the hinge portion for connecting the both clamping pieces so as to be freely opened and closed can be configured without using any separate member, and the cost can be greatly reduced. it can. At this time, as apparent from the application, the iron plate constituting the clamping piece needs a certain thickness, but according to the configuration of claim 4, between the two clamping pieces constituting the hinge portion. The connecting plate portion can be easily bent, and the fastening operation force required for use can be reduced.

  Moreover, according to the structure of Claim 5, only one bolt is needed as another member which comprises the fastening screw means, and also the relative angle change due to the tightening of both sandwiching pieces A reliable fastening effect can be obtained without being affected. In this case, according to the configuration of the sixth aspect, even if the relative angle between the two clamping pieces changes with tightening, the vicinity of the center of the inner surface of the bolt head is brought into contact with the outer surface of the clamping piece. Thus, the fastening force from the bolt side can be transmitted to the clamping piece efficiently and reliably.

  Furthermore, according to the structure of Claim 7, the structure considered normally as a hinge part, ie, the case where the hinge part of the structure using the left-right width direction orthogonal axis | shaft orthogonal to the opening / closing direction of a clamping piece is employ | adopted. In comparison, the structure is simple, high dimensional accuracy is not required, and it can be implemented at low cost.

  Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. In FIGS. 1 to 3, 1 is a main body, and 2 is a fastening screw means. The main body 1 includes a pair of left and right holding pieces 3 and 4 and a hinge portion 5 that connects the holding pieces 3 and 4 so as to be freely opened and closed. Specifically, a pair of left and right cuts 6 are provided at two locations near the center in the length direction of both sides parallel to the length direction of one strip-shaped iron plate. The belt-like plate is bent into a gate shape so as to form a connecting plate portion 7 between the four, and a press-work is performed into a groove-shaped cross-sectional shape in which both leg-like portions of the gate shape are open on the inside and the connecting plate portion 7 side is closed. Thus, sandwiching pieces 3 and 4 are configured. A pair of through holes 8 are provided in the width direction in the connecting plate portion 7 that connects both the sandwiching pieces 3 and 4 at one end thereof, and the connecting plate portion 7 constitutes the hinge portion 5.

  The sandwiching pieces 3 and 4 having the above-described configuration are open to the inside, which are composed of opposing plate portions 9 and 10 that face each other and continue in a gate shape via the connecting plate portion 7, and left and right side plate portions 11a and 11b and 12a and 12b. The opposing plate portion 9 of one sandwiching piece 3 integrally has a short cylindrical wall projecting outward at an approximately central position in the length direction of the sandwiching piece, and has an inner peripheral surface. A female screw hole 13 in which a female screw groove is formed is provided, and the opposing plate portion 10 of the other holding piece 4 has an arcuate protruding portion 14 whose longitudinal cross-sectional shape protrudes outward at a substantially central position in the holding piece length direction. A long hole 15 in the length direction of the holding piece is provided in the arcuate protrusion 14, and the female screw hole 13 of one holding piece 3 is connected to the tip of a bolt 16 penetrating the long hole 15 from the outside to the inside. Threaded through. Therefore, the fastening screw means 2 is constituted by the female screw hole 13 and the bolt 16. The arcuate protrusion 14 is linear with respect to the axial direction of the bolt 16 in the width direction of the clamping piece 4, so that the bolt head 16 a has an arcuate protrusion 14 on both sides of the long hole 15. The left and right sides of the bolt axis position are in line contact with the arcuate outer surface of the bolt.

  Reinforcing bar fitting recesses 17, 18 formed in both sandwiching pieces 3, 4 by notching from the inner edges of the left and right side plate parts 11 a, 11 b and 12 a, 12 b at the position closer to the clamping piece free end than bolt 16. Is provided. These recesses 17 and 18 are formed with square cuts at the fan-shaped deepest part, and even if there is a change in the diameter of the reinforcing bar fitted into these recesses 17 and 18, both side corners 17 a and 18 a of the square cuts are formed. Is configured so that the surface of the reinforcing bar always comes into contact.

  Explaining how to use, as shown in FIG. 1 to FIG. 3, the bolt 16 is loosened at the fastening portion (the parallel portion) of the two parallel reinforcing bars 19 and 20 whose end portions are parallel to each other. Then, the main body 1 in a state where both the sandwiching pieces 3 and 4 are open is covered, and the parallel reinforcing bars 19 and 20 are fitted between the both sandwiching pieces 3 and 4 outside the bolt 16. In this state, when the bolt 16 is screwed into the female screw hole 13, the other clamping piece 4 is pressed toward the one clamping piece 3 by the bolt head 16a, and both clamping pieces 3 and 4 are hinged. As shown in FIG. 4, the parallel reinforcing bars 19, 20 are clamped between the two sandwiching pieces 3, 4. At this time, since the outer side of one reinforcing bar 19 is fitted in the concave part 17 of the one holding piece 3 and the outer side of the other reinforcing bar 20 is fitted in the concave part 18 of the other holding piece 4, both the reinforcing bars 19, 20 are fastened to each other while being held in parallel with the axial direction of the bolt 16.

  The relative angle between the sandwiching pieces 3 and 4 changes as the sandwiching pieces 3 and 4 are moved closer to each other, so that the sandwiching piece 3 is at a fixed position (internal threaded hole 13). The bolt 16 that maintains an angle of 90 degrees changes the angle and the position in the length direction of the sandwiching piece at a portion that penetrates the sandwiching piece 4. However, since the bolt 16 passes through the elongated hole 15 provided in the arcuate protrusion 14 with respect to the sandwiching piece 4, the bolt head 16 a always has an arcuate shape of the arcuate protrusion 14 on both sides of the elongated hole 15. Both pinching pieces 3 and 4 can be efficiently tightened without being affected by the change in the angle and the position in the length direction of the pinching piece while maintaining a state in line contact with the outer side surface.

  As shown in FIG. 5, each of the sandwiching pieces 3 and 4 is provided with an arcuate protrusion 14 provided on the sandwiching piece 4, and the arcuate protrusion 14 is used as the fastening screw means 2. A through hole 21 having a diameter that allows the bolt 16 to swing freely is provided at the top of the arcuate protrusion 14, and the bolt 16 that passes through both the through holes 21 and a nut that is screwed onto the tip side of the bolt 16. Thus, the fastening screw means 2 can be constituted. In this case, each arcuate projecting portion 14 always serves to bring the bolt head 16a and the nut 22 into contact with the outer surfaces of the sandwiching pieces 3 and 4 on both the left and right sides of the axial center position.

  Further, the hinge portion 5 in the embodiment shown in FIG. 5 has a pair of projecting plate portions 23 that project outward from the end portions of the both sandwiching pieces 3 and 4 and face each other in the opening / closing direction of the both sandwiching pieces 3 and 4. , 24 and a connecting tool (rivet, bolt, nut, etc.) 25 for connecting both projecting plate portions 23, 24 through the opening and closing direction of both sandwiching pieces 3, 4 Both sandwiching pieces 3 and 4 can be opened and closed by play between the projecting plate portions 23 and 24.

  Furthermore, the hinge part 5 of the embodiment shown in FIG. 6 extends the left and right side plate parts 11a, 11b and 12a, 12b of the holding pieces 3, 4 from the left and right bearing plate parts 26, 27 respectively. The pair of left and right bearing plate portions 27 of the other sandwiching piece 4 is fitted between the pair of left and right bearing plate portions 26 of the sandwiching piece 3, and the support shaft 28 is passed through the bearing plate portions 26 and 27. The two sandwiching pieces 3 and 4 can be opened and closed around the support shaft 28.

  The fastening screw means 2 exemplifies the embodiment shown in FIGS. 1 to 4 and the embodiment shown in FIGS. 5 and 6, and the hinge portion 5 is the embodiment shown in FIGS. Although the embodiment shown in FIG. 5 and the embodiment shown in FIG. 6 are illustrated, these embodiments can be arbitrarily combined. Of course, the configuration of the present invention including the configuration of the sandwiching pieces 3 and 4 is not limited to the above embodiment.

Fig. A is a longitudinal side view showing the first embodiment, and Fig. B is a plan view thereof. It is a right view which shows 1st embodiment. It is a left view which shows 1st embodiment. It is a vertical side view which shows the use condition in 1st embodiment. It is a vertical side view which shows 2nd embodiment. It is a side view which shows 3rd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Fastening screw means 3, 4 Clamping piece 5 Hinge part 7 Connecting plate part (hinge part)
8 Through-holes 9 and 10 Opposing plate part (clamping piece)
11a to 12b Left and right side plate parts (clamping pieces)
13 Female screw hole (fastening screw means)
14 Arc-shaped protrusion 15 Long hole 16 Bolt (fastening screw means)
17, 18 Recesses 19, 20 Reinforcing bar 21 Through hole 22 Nut (fastening screw means)
23, 24 Projection plate (hinge)
25 Connector (hinge part)
26, 27 Bearing plate (hinge)
28 Support shaft (hinge)

Claims (7)

  It consists of a pair of clamping pieces whose one end is connected to be freely opened and closed via a hinge part, and fastening screw means installed between the both clamping pieces in order to close both the clamping pieces in the approaching direction. Reinforcing bar fasteners, in which concave portions are formed in which the outer sides of two parallel reinforcing bars are fitted at positions closer to the free end side of the holding pieces than the fastening screw means on the inner sides of both holding pieces facing each other.   2. The sandwiching piece according to claim 1, wherein each sandwiching piece is formed by bending an iron plate into a groove shape with an open inner side, and the recess is formed by cutting from the inner edges of the left and right side plate portions of each sandwiching piece. Rebar fastener.   Both sandwiching pieces are composed of two opposing plate portions of a belt-like strip-like plate and the left and right side plate portions integrally provided from both of the opposing plate portions, and connecting both sandwiching pieces of the belt-like plate. The reinforcing bar fastener according to claim 2, wherein the hinge portion is constituted by a plate portion.   The reinforcing bar fastener according to claim 3, wherein a hole for reducing the bending strength is provided in a connecting plate portion of the belt-shaped plate constituting the hinge portion.   The fastening screw means includes a screw hole provided in one holding piece and a long hole extending in the length direction of the holding piece provided in the other holding piece, and is screwed into the screw hole and has a head portion. The reinforcing bar fastener according to any one of claims 1 to 4, comprising a bolt that abuts against an outer surface of the other holding piece.   The reinforcing bar fastener according to claim 5, wherein the elongated hole is provided in an arcuate protruding portion formed in the other holding piece so as to protrude in an arc shape along at least the length direction of the elongated hole. . A hinge part protrudes from one end part of both clamping pieces, and a pair of protruding plate parts adjacent to each other in the opening / closing direction of both clamping pieces, and a coupling tool that penetrates and connects both protruding plate parts in the opening / closing direction of both clamping pieces The reinforcing bar fastener according to claim 1, wherein both sandwiching pieces can be opened and closed by play between the coupling tool and both projecting plate portions.