Reinforcing bar connector and reinforcing bar intersection connector

Abstract

To obtain a steel bar coupling tool 3 capable of coupling a steel bar intersection part by simply pushing the steel bar coupling tool from above and to obtain a steel bar intersection part coupling device 321 capable of being implemented at low cost using the steel bar coupling tool.SOLUTION: A steel bar coupling tool comprises an upper steel bar insertion part 5 and a lower steel bar insertion part 7 having a space 6 for lower steel bar insertion in a downward C-shaped cross section hole shape and both lateral surfaces 7b are flat surfaces. A steel bar intersection part coupling device 321 has a horizontal type coupling tool magazine 212 in a horizontal cylindrical shape for storing a plurality of coupling tools side by side and its ends in a horizontal direction have an upper portion and a lower portion as openings 212a and 212b and the steel bar intersection part coupling device has an opening / closing gate 223 for temporarily supporting the steel bar coupling tool capable of opening / closing the lower opening 212a. A coupling tool pushing-in cylinder 225 is fitted with a coupling tool pushing-in part 225a for pushing the steel bar coupling tool 3 on the closed opening / closing gate 223 down as soon as the opening / closing gate 223 is opened, and for pushing it into the steel bar intersection part.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] This invention relates to a reinforcing bar fastener for connecting the intersection of an upper reinforcing bar 1 and a lower reinforcing bar 2 that intersect with each other in a planar view, and to a reinforcing bar intersection connecting device that automatically connects reinforcing bar intersections using this reinforcing bar fastener. [Background technology]

[0002] When placing rebar to be embedded in concrete during the construction of architectural structures, civil engineering structures, and other structures, it is necessary to join the intersections of the upper and lower rebars that cross each other. However, since manually joining the intersections of the upper and lower rebars using wire (gauge wire) is inefficient, various rebar joining devices are used. As this type of reinforcing bar fastener, a reinforcing bar fastener made of steel plate (hereinafter sometimes simply referred to as a fastener) is generally adopted (see Patent Documents 1 to 4). Since the reinforcing bar fastener of the present invention is not made of steel plate, detailed explanation of the specific shapes and structures of the reinforcing bar fasteners of Patent Documents 1 to 4, all of which are made of steel plate, will be omitted; however, all of these conventional reinforcing bar fasteners made of steel plate basically have a structure in which a steel plate is folded in half, and the folded steel plate part of the reinforcing bar fastener is pushed into the intersection of the reinforcing bars to sandwich the reinforcing bars, so they are not necessarily able to hold the reinforcing bars stably without rattle.

[0003] To briefly explain each patent document, Patent Document 1 describes a structure in which a steel plate is cut out in a shape that allows for the formation of two folded steel plate sections (folded sections) that sandwich each of the upper and lower orthogonal reinforcing bars, and then folded back to sandwich both the upper and lower reinforcing bars with the two folded steel plate sections (folded sections). Patent Document 2 has a configuration in which the upper reinforcing bar is sandwiched between two folded steel plate portions (folded portions). In Patent Document 3, the lower reinforcing bar is sandwiched in the lower part of the folded steel plate, away from the folded part. Patent Document 4 discloses a structure in which the steel plate is folded back so as to be in close contact with the outer peripheral surface of the lower reinforcing bar.

[0004] As a means of joining upper and lower rebar intersections using rebar fasteners, not limited to the above-mentioned rebar fasteners, a worker can either push the rebar fastener in directly with his or her hands or use some kind of tool. In the above-mentioned Patent Document 1, a bundling tool 100 shown in FIG. 16 of Patent Document 1 is used. In the above-mentioned Patent Document 2, the mounting jig 30 shown in FIG. 11 of Patent Document 2 is used. In the above-mentioned Patent Document 3, no specific tools are shown, but the structure is simple and it is thought that manual work is intended. In the above-mentioned Patent Document 4, a reinforcing bar binding machine (a tool) 20 shown in FIG. 1 of Patent Document 4 is used.

[0005] As described above, it is inefficient for workers to use tools to connect the upper and lower reinforcing bar intersections using reinforcing bar fasteners, as there are many reinforcing bar intersections.Therefore, a reinforcing bar intersection connecting device that does not require human labor is desired. Various types of reinforcing bar intersection joining devices that do not require human power have been proposed, but in most cases, these devices join (bind) reinforcing bar intersections with wire. The reinforcing bar fasteners targeted by the present invention are not wire fasteners, but rather reinforcing bar fasteners that fasten reinforcing bars by pushing them into the intersections from above. Therefore, there is no need to explain the specific configuration of a wire fastening device, and therefore no patent document is provided. However, examples include JP 8-199818, JP 2017-20282, JP 6-219420, JP 2020-128681, JP 2020-197072, JP 8-109744, JP 2019-039174, JP 2005-188064, and many others. In order to use an automatic device to connect (bind) the numerous rebar intersections of rebars arranged in a grid pattern with wire, a fairly complex mechanical mechanism and a high-precision control mechanism are required, and the equipment costs are likely to be extremely high, for example, using a method using a robot. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 6-193200 [Patent Document 2] Patent Publication No. 11-336325 [Patent Document 3] Patent Publication No. 2004-232373 [Patent Document 4] Patent Publication No. 7-310435 Summary of the Invention [Problem to be solved by the invention]

[0007] As mentioned above, none of the conventional steel rebar fasteners necessarily provide a stable hold for the rebar without rattle.

[0008] Furthermore, as mentioned above, the method of using a robot as a rebar intersection joining device requires a complex mechanical mechanism and a highly accurate control mechanism, which is likely to result in high equipment costs.

[0009] The present invention has been made in light of the above background, and aims to provide a reinforcing bar fastener that can be used to fasten reinforcing bar intersections by a simple operation of simply pushing the reinforcing bar fastener into the reinforcing bar intersections from above, rather than binding them with wire. Another object of the present invention is to provide a reinforcing bar intersection connecting device that can be realized inexpensively using such reinforcing bar connecting tools. [Means for solving the problem]

[0010] The invention of claim 1 that solves the above problem is: A reinforcing bar connector 3 made of a flexible material for connecting a reinforcing bar intersection between an upper reinforcing bar 1 and a lower reinforcing bar 2 that intersect each other in a plan view, An upper reinforcing bar insertion portion 5 having an upper reinforcing bar insertion space 4 open on the lower side through which the upper reinforcing bar 1 passes; and a lower reinforcing bar insertion portion 7 provided on both the left and right sides of the upper reinforcing bar insertion space 4 and having a lower reinforcing bar insertion space 6 through which the intersecting lower reinforcing bars 2 pass, The lower reinforcing bar insertion space 6 has a lower opening 8 that is narrowed to an extent that the lower reinforcing bar 2 can be pushed into the lower reinforcing bar insertion space 6 from below accompanied by elastic deformation, and has a downward C-shaped cross-sectional hole shape, The reinforcing bar connector 3 is characterized in that both side surfaces are flat.

[0011] Claim 2 provides the reinforcing bar fastener of claim 1, The upper surface of the upper reinforcing bar insertion portion 5 is characterized by having a pin hole 11 into which a pin for restraining the movement of the reinforcing bar fastener 3 can be inserted.

[0012] Claim 3 provides the reinforcing bar fastener of claim 1 or 2, The reinforcing bar fastener is characterized in that the lower end surface of the lower reinforcing bar insertion portion of the reinforcing bar fastener is not positioned below the lower surface of the lower reinforcing bar when the upper reinforcing bar and the lower reinforcing bar that cross each other are inserted into the reinforcing bar fastener.

[0013] The invention of claim 4 is as follows: A reinforcing bar intersection connecting device 321 that connects a reinforcing bar intersection between an upper reinforcing bar 1 and a lower reinforcing bar 2 that intersect each other in a plan view using the reinforcing bar fastener 3 of any one of claims 1 to 3, A horizontally oriented cylindrical structure in which a plurality of the reinforcing bar fasteners 3 can be arranged side by side from a position directly above the reinforcing bar intersection, and upper and lower portions at the directly above position have openings 212a and 212b. a fastener horizontal driving means 221 for sequentially moving the reinforcing bar fasteners 3 in the horizontal fastener magazine 212 from the end opposite the openings 212a and 212b toward the openings 212a and 212b; an opening / closing gate 223 for temporarily supporting reinforcing bar fasteners that can open and close the lower opening 212a in the horizontal fastener magazine 212; a cylindrical bottom portion 212c that forms a cylindrical end portion adjacent to the openings 212a and 212b of the cylindrical horizontal fastener magazine 212; a fastener pushing cylinder 225 having a downward piston rod 225b attached with a fastener pushing portion 225a that pushes down the reinforcing bar fastener 3 on the closed opening / closing gate 223 and pushes it into the reinforcing bar intersection at the same time as the opening / closing gate 223 opens; The present invention is characterized by the following features.

[0014] Claim 5 is the reinforcing bar intersection connecting device of claim 4, The height position of the upper surface of the opening / closing gate is lower than the height position of the lower surface of the inner surface of the horizontal fastener magazine 212 by a step.

[0015] The invention of claim 6 is as follows: A reinforcing bar intersection connecting device 421 that connects a reinforcing bar intersection between an upper reinforcing bar 1 and a lower reinforcing bar 2 that intersect each other in a plan view using the reinforcing bar fastener 3 of claim 1 or 2, a horizontal fastener magazine 212' having a horizontal cylindrical shape with openings 212a and 212b at the top and bottom of the directly above position, capable of accommodating a plurality of the reinforcing bar fasteners 3 in a line on one side in the horizontal direction from a position directly above the reinforcing bar intersection; a fastener horizontal driving means 221 for sequentially moving the reinforcing bar fasteners 3 in the horizontal fastener magazine 212' from the end opposite the openings 212a and 212b toward the openings 212a and 212b; a fastener temporary support cylinder device 233 provided on the outside of a cylindrical bottom equivalent portion 212c' forming a cylindrical end portion adjacent to the openings 212a, 212b in the cylindrical horizontal fastener magazine 212', the fastener temporary support cylinder device 233 having a piston rod 233a that can be inserted into the lower reinforcing bar insertion space 6 of the lower reinforcing bar insertion portion 7 of the reinforcing bar fastener 3; a fastener pushing cylinder 225 having a downward piston rod 225b attached with a fastener pushing portion 225a that pushes down the reinforcing bar fastener 3 supported by the piston rod 233a inserted into the lower reinforcing bar insertion space 6 while simultaneously retracting the piston rod 233a, thereby forcing it into the reinforcing bar intersection; The present invention is characterized by the following features.

[0016] The invention of claim 7 is as follows: In the reinforcing bar intersection connecting device of claims 4 to 6, when the reinforcing bar fastener 3 of claim 2 is used as the reinforcing bar fastener 3, it is characterized in that it is provided with a pin that can be inserted into or removed from the pin hole 11 of the reinforcing bar fastener 3 located next to the lower opening 222a in the horizontal fastener magazine 212, 212'. [Effects of the Invention]

[0017] According to the reinforcing bar fastener of the invention of claim 1, the intersection of upper and lower reinforcing bars can be joined simply by pushing the reinforcing bar fastener 3 into the reinforcing bar intersection. Therefore, it is possible to realize a reinforcing bar intersection joining device that automatically performs reinforcing bar joining operations. (a) Since the reinforcing bar fasteners 3 have flat surfaces on both sides, it is possible to stably arrange reinforcing bar fasteners 3 of the same shape side by side in contact with each other, and it is possible to adopt a horizontal fastener supply unit (horizontal fastener magazines 212, 212' in the embodiment) as a reinforcing bar intersection fastening device that sequentially supplies a large number of reinforcing bar fasteners arranged side by side. (b) The lower reinforcing bar insertion space 6 has a lower opening 8 that is narrowed to the extent that the lower reinforcing bar 2 can be pushed into the lower reinforcing bar insertion space 6 from below with elastic deformation, and has a downward C-shaped cross-sectional hole shape. Therefore, it is possible to join the upper and lower reinforcing bars simply by pushing the reinforcing bar connector 3 into the reinforcing bar intersection, making it possible to realize a reinforcing bar intersection joining device that automatically performs reinforcing bar joining operations.

[0018] According to claim 2, by using a reinforcing bar fastener 3 having a pin hole 11 on the top surface of the upper reinforcing bar insertion portion 5, it is possible to appropriately and easily configure a mechanism in which a reinforcing bar fastener 3 located next to a reinforcing bar fastener 3 located at a push-in position at an end in the horizontal push-type fastener magazine 212 of a reinforcing bar intersection fastener device 321 described later waits without interfering with the reinforcing bar fastener 3 located at the push-in position at the end. In the reinforcing bar fastener of claim 3, the lower end surface (lower end portion) of the lower reinforcing bar insertion portion is not positioned below the lower surface of the lower reinforcing bar when the upper reinforcing bar and the lower reinforcing bar that cross each other are inserted into the reinforcing bar fastener. However, if it were positioned below the lower surface (the legs extending downward), inconvenience would arise. That is, when multiple unit reinforcing bars made using this reinforcing bar fastener 3 are transported, for example, on a truck, the lower end of the reinforcing bar insertion part of the reinforcing bar fastener 3 may interfere with the reinforcing bar fastener 3 of the unit reinforcing bar below, causing problems with the reinforcing bar fasteners 3 of the upper and lower unit reinforcing bars. However, with the reinforcing bar fastener of claim 3, such problems do not occur.

[0019] According to the reinforcing bar intersection fastening device 321 of the invention of claim 4, the fastener supply unit that supplies the reinforcing bar fasteners is a horizontal fastener magazine 212 that is a horizontally oriented cylindrical shape, The reinforcing bar fasteners 3 at the end positions stored in this horizontal fastener magazine 212 are held by an openable / closable gate 223, and as soon as this gate 223 opens, the fastener pushing cylinder is activated and the fastener pushing section pushes the reinforcing bar fasteners 3 into the reinforcing bar intersection.With this extremely simple configuration, a large number of fasteners 3 are automatically pushed one by one into the reinforcing bar intersection, connecting the upper and lower reinforcing bars. That is, the configuration is such that the effects (a) and (b) described above regarding the effects of the reinforcing bar fastener 3 are realized to the greatest extent possible.

[0020] According to claim 5, the height position of the upper surface of the opening / closing gate 223' is lower than the height position of the lower surface of the inner surface of the horizontal fastener magazine 212, and thus it is easy to clearly identify the timing for pushing the reinforcing bar fastener 3 located at the step portion into the reinforcing bar intersection portion with the fastener pushing cylinder.

[0021] According to the reinforcing bar intersection connecting device 421 of the invention of claim 6, The fastener supply unit that supplies rebar fasteners is a horizontal fastener magazine 212', which is also horizontally oriented and cylindrical. The piston rod of the cylinder device 233 for temporary support of fasteners, which is provided on the outside of the tube bottom equivalent part 212c' that forms the end of the tube, can be instantly inserted into the lower reinforcing bar insertion space 6 (space part with a downward C-shaped cross-section hole shape) of the reinforcing bar fastener 3 that is sent to the end position (pushing position) of the horizontal fastener magazine 212', and at the same time, when the fastener pushing-in cylinder is activated and its fastener pushing-in part comes into contact with the upper end of the reinforcing bar fastener 3, it instantly retracts, allowing the fastener pushing-in part to push the fastener 3 into the reinforcing bar intersection part. In this way, with an extremely simple configuration, the operation of automatically pushing a large number of fasteners 3 one by one into the rebar intersections to fasten the upper and lower rebars is realized. That is, the configuration is such that the effects (a) and (b) described above regarding the effects of the reinforcing bar fastener 3 are realized to the greatest extent possible. [Brief explanation of the drawings]

[0022] [Figure 1] 1 shows an embodiment of a reinforcing bar fastener according to the present invention, where (a) is a front view (however, in the explanatory diagrams of the reinforcing bar intersection fastening device in FIG. 3 and subsequent figures, this corresponds to a right side view), (b) is a right side view, and (c) is a plan view. [Figure 2] This is a diagram showing the process of joining upper and lower rebars that intersect at right angles using the rebar connector in Figure 1, and the joining is performed in the order of (A), (B), and (C) in the front view, and (D), (E), and (F) in the side view. Note that the front view of the rebar connector 3 in Figures 1 and 2 is the right side view in Figure 3 and subsequent figures that explain the rebar intersection joining equipment. [Figure 3] This is a schematic diagram showing the overall configuration of a reinforcing bar intersection connecting equipment 521, which is composed of multiple reinforcing bar intersection connecting devices 321 of the first embodiment that automatically connect the reinforcing bar intersections of upper and lower reinforcing bars using the above-mentioned reinforcing bar connecting tool 3, where (a) is a plan view, (b) is a front view of (a), and (c) is a right side view of (a). [Figure 4] (a) is an enlarged view from the arrow A showing the configuration of one embodiment of the reinforcing bar intersection connecting device 321 in Figure 3 (however, the front wall surface of the horizontal fastener magazine 212 is omitted), and (b) is a view from the arrow B showing the same (however, the bottom part 212c of the horizontal fastener magazine 212 is omitted). [Figure 5] FIG. 5 is an enlarged view of the main part of FIG. [Figure 6] FIG. 4(b) is an enlarged view of FIG. [Figure 7] 10 is a perspective view clearly showing the shape of the vicinity of the tip of the horizontal fastener magazine 212. FIG. [Figure 8] 5(A) is a diagram showing a modification of the main part of the reinforcing bar intersection joining device 321, and corresponds to FIG. [Figure 9] This is a schematic diagram showing the overall configuration of a reinforcing bar intersection connecting equipment 621, which is composed of multiple reinforcing bar intersection connecting devices 421 of the second embodiment that automatically connect the reinforcing bar intersections of upper and lower reinforcing bars using the above-mentioned reinforcing bar connecting tool 3, where (a) is a plan view, (b) is a front view of (a), and (c) is a right side view of (a). [Figure 10] (a) is an enlarged view as viewed from the arrow C in Figure 9 showing the configuration of one embodiment of the reinforcing bar intersection connecting device 421 (however, the front wall surface of the horizontal connecting fixture magazine 212' is omitted), and (b) is an enlarged view as viewed from the arrow D (however, the connecting fixture temporary support cylinder device 233 is omitted). [Figure 11] 10(a) is an enlarged view of a main part of FIG. 10(a) (however, some shortening is omitted), and FIG. 10(b) is an enlarged view of FIG. 10(b). [Figure 12] FIG. 10 is a perspective view clearly showing the shape of the vicinity of the tip of a horizontal fastener magazine 212'. [Figure 13] 1 is a schematic explanatory diagram of a reinforcing bar crossing assembly table that can be used as a reinforcing bar receiving stand in a reinforcing bar crossing connection facility that is configured by installing multiple reinforcing bar crossing connection devices of the present invention; (a) is a plan view, (b) is a front view of (a), and (c) is a right side view of (a). [Figure 14] FIG. 10 is a front view showing a reinforcing bar fastener 31 according to another embodiment of the present invention. [Figure 15] 1 shows a reinforcing bar fastener 32 according to yet another embodiment of the present invention, in which (a) is a front view and (b) is a right side view (reinforcing bars 1 and 2 are also shown in (a)). [Figure 16]The figures show examples of fasteners that intersect at various angles, with (A) being the case where the fasteners intersect at a right angle in each of the above examples, (B) being the case where the fasteners intersect at a 60° angle, (C) being the case where the fasteners intersect at a 45° angle, and (D) being the case where the fasteners intersect at a 30° angle. (E) is a three-view drawing of the case where the fasteners intersect at a 45° angle. DETAILED DESCRIPTION OF THE INVENTION

[0023] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments for carrying out the reinforcing bar fastener and reinforcing bar intersection fastening device of the present invention will be described with reference to the drawings. [Example]

[0024] FIG. 1 shows a reinforcing bar fastener 3 according to one embodiment of the present invention, with (A) being a front view, (B) being a right side view, and (C) being a plan view. FIG. 2 is a diagram showing how to use this reinforcing bar connector 3 to connect upper reinforcing bars 1 and lower reinforcing bars 2 that intersect at right angles. In the following, reinforcing bar fasteners may be abbreviated to simply "fasteners." This reinforcing bar fastener 3 comprises an upper reinforcing bar insertion section 5 having an upper reinforcing bar insertion space 4 that is open on the bottom and through which an upper reinforcing bar 1 passes, and a lower reinforcing bar insertion section 7 that is provided on both the left and right sides of the upper reinforcing bar insertion space 4 and has a lower reinforcing bar insertion space 6 through which a perpendicular lower reinforcing bar 2 passes. The space 6 for inserting the lower reinforcing bar has a lower opening 8 that is narrowed to the extent that the lower reinforcing bar 2 can be pushed into the space 6 for inserting the lower reinforcing bar from below with elastic deformation, and has a downward C-shaped cross-sectional hole shape, as shown in Figure 1 (b). Both side surfaces 7b of this reinforcing bar fastener 3 (outer surfaces of the left and right lower reinforcing bar insertion portions 7) are flat surfaces that can come into contact with reinforcing bar fasteners 3 of the same shape as this reinforcing bar fastener 3 side by side. Note that the entire surface does not necessarily have to be flat (as long as it has a flat surface that can come into contact with reinforcing bar fasteners 3 side by side). The upper surface of the upper reinforcing bar insertion portion 5 has a pin hole 11 into which a retaining pin 251 a (described later) can be inserted to restrain the movement of the reinforcing bar fastener 3 . The reinforcing bar connector 3 in this embodiment is made of resin, and for example, polypropylene, polyethylene, ABS resin (acrylonitrile-butadiene-styrene resin), etc. can be used. The angle θ of the lower opening 8 in the illustrated rebar fastener 3 (the angle θ at the circular hole contour) varies depending on the flexural modulus of the material used, but can be in the angle range of, for example, 55° to 140°, or 60° to 110°, or 60° to 80°. Depending on the width (or angle) of the lower opening 8 having a downward C-shaped cross section, it may be possible to use a soft metal such as copper or aluminum. The reinforcing bar connector 3 in the embodiment is assumed to be, for example, an upper reinforcing bar 1 designated D10 and a lower reinforcing bar 2 designated D13. However, the size of the reinforcing bar to be used is not limited.

[0025] The procedure for joining the rebar intersections of upper and lower rebars 1 and 2 with this rebar connector 3 is as shown in Figure 2. When the rebar connector 3 is positioned above the rebar intersection as shown in Figures 2(a) and (d) and pushed down, the upper rebar 1 enters the upper rebar insertion space 4 of the rebar connector 3, and the lower end face of the lower rebar insertion portion 7 of the rebar connector 3 comes into contact with the lower rebar 2. When the rebar connector 3 is pushed down further, the lower end of the lower rebar insertion portion 7 opens to the left and right, widening the lower opening 8 of the lower rebar insertion space 6, as shown in Figure 2(e). When the rebar connector 3 is pushed down further, the lower rebar 2 fits into the lower rebar insertion space 6, and the lower opening 8 of the lower rebar insertion space 6 returns to its original state, as shown in Figures 2(c) and (f). The upper rebar 1 enters up to the top end of the upper rebar insertion space 4. In this way, the upper and lower reinforcing bars can be joined simply by pushing the reinforcing bar connector 3 into the reinforcing bar intersection. [Example]

[0026] 3 to 8 show a first embodiment of the reinforcing bar intersection joining device of the present invention. Figure 3 shows a schematic diagram of the overall configuration of a reinforcing bar intersection connection equipment 521, which is composed of multiple reinforcing bar intersection connection devices 321 that automatically connect the reinforcing bar intersections of reinforcing bars 1 and 2 (horizontal reinforcing bars 1 and vertical reinforcing bars 2) arranged in a grid pattern on a reinforcing bar intersection assembly table 200 (described later in Figure 13) using, for example, the reinforcing bar connectors 3 described above. Figure 3(a) is a plan view, (b) is a front view, and (c) is a right side view. This reinforcing bar intersection connecting device 321 is a reinforcing bar intersection connecting device that can connect the reinforcing bar intersection between an upper reinforcing bar 1 and a lower reinforcing bar 2 that intersect perpendicularly to each other in a plan view by pushing the reinforcing bar intersection from above, for example, using the reinforcing bar connector 3 described above. As shown in Figure 13 below, the reinforcing bar intersection connecting equipment 521 (and reinforcing bar intersection connecting equipment 621 described later) supports fastener magazines 212 (and fastener magazines 212' described later) of multiple reinforcing bar intersection connecting devices 321 (and reinforcing bar intersection connecting devices 421 described later) on a magazine rack 210, and moves sequentially as shown by the arrow, pushing fasteners 3 into the vertical and horizontal reinforcing bar intersections arranged on the reinforcing bar intersection assembly table 200 to connect them.

[0027] The reinforcing bar intersection joining device 321 will be described with reference to Figures 4 to 8. Note that the plate thicknesses shown in the figures are schematic. 4A is a side view of the reinforcing bar intersection joining device 321, and FIG. 4B is a front view of the reinforcing bar intersection joining device 321. FIG. a horizontal fastener magazine 212 having a horizontal cylindrical shape, which can accommodate a plurality of the reinforcing bar fasteners 3 arranged side by side from a position directly above the reinforcing bar intersection to one side (the right side in FIG. 4(A)), and which has openings 212a and 212b (lower opening 212a and upper opening 212b) at the upper and lower portions directly above the position; a fastener horizontal driving means 221 that sequentially moves the reinforcing bar fasteners 3 in the horizontal fastener magazine 212 from the end opposite to the end where the openings 212a and 212b are located (the right side in FIG. 4(A)) toward the openings 212a and 212b; a plate-shaped opening / closing gate 223 for temporarily supporting reinforcing bar fasteners, which can open and close the lower opening 212a in the horizontal fastener magazine 212; an opening / closing gate drive cylinder 224 for driving the opening / closing gate 223 to open and close; a cylindrical bottom portion 212c that forms a cylindrical end portion adjacent to the openings 212a and 212b of the cylindrical horizontal fastener magazine 212; a fastener pushing cylinder 225 having a downward piston rod 225b attached with a fastener pushing portion 225a that pushes down the reinforcing bar fastener 3 on the closed opening / closing gate 223 and pushes it into the reinforcing bar intersection at the same time as the opening / closing gate 223 opens (retracts); It is equipped with: 7 is a perspective view showing the shape of the vicinity of the end of the horizontal fastener magazine 212 on the side of the opening / closing gate 223. The opening through which the opening / closing gate 223 enters and exits is indicated by 212d. The open / close gate drive cylinder 224 in the illustrated example is supported on the side surface of the horizontal fastener magazine 212 by a support member 231 (not shown in FIG. 7).

[0028] At the position of the fastener 3 next to the fastener 3 on the opening / closing gate 223 in the horizontal fastener magazine 212, a fastener retaining device 251 having a retaining pin 251a that can be inserted into and removed from the pin hole 11 at the upper end of the fastener 3 is provided to temporarily restrain the fastener 3 so that it does not move toward the opening / closing gate 223. For example, a fluid pressure cylinder device can be used as this fastener retaining device 251. Alternatively, the retaining pin 251a can be moved in and out of the pin hole 11 by a mechanical mechanism. The cross-sectional shape of the fastener magazine 212 is a rectangle corresponding to the side view of the fastener 3 (FIG. 1(b)). The length of the horizontal fastener magazine 212 can be further increased to store a larger number of fasteners. The illustrated horizontal fastener driving means 221 is a coil spring, but air pressure or other methods can also be used. The horizontal fastener magazine 212 in the illustrated example has four waiting fasteners 3, and the underside of the right end of the horizontal fastener magazine 212 in Figure 4(A) is the fastener insertion zone 226. Various fastener insertion means are possible, such as a method in which the coil spring 221 is retracted and then the fasteners 3 are pushed up from below into the horizontal fastener magazine 212. In this case, the continuous operation of pushing the fasteners 3 into the rebar intersections is performed without interruption.

[0029] In the above-mentioned reinforcing bar intersection connecting device 321, the procedure for pushing the connecting fixture 3 into the reinforcing bar intersection between the upper reinforcing bar 1 and the lower reinforcing bar 2 to connect the upper and lower reinforcing bars 1 and 2 will be explained with reference to Figures 4(a) and (b) and Figures 5, 6, and 7 which show enlarged views of these figures. Before the start of the intersection joining work, the equipment is in the state shown in Figure 4. That is, in the illustrated example, five fasteners 3 are inserted into the horizontal fastener magazine 212, with the leading fastener 3 resting on the opening / closing gate 223 and the adjacent fastener 3 being held in place by the fastener holding pin 251a of the fastener holding device 251. To join the intersection, first, the fastener push-out cylinder 225 is activated, and the fastener push-in part 225a descends. When the fastener push-in part 225a comes into contact with the upper end of the fastener 3, the opening / closing gate drive cylinder 224 is activated instantaneously, and the opening / closing gate 223 momentarily retracts (opens). At the same time, the force of the fastener push-out cylinder 225 causes the fastener push-in part 225a to continue descending, pushing the fastener 3 into the rebar intersection. In this way, the fastener 3 joins the rebar intersection.

[0030] Next, the fastener pushing portion 225a of the fastener pushing cylinder 225 that pushed in the fastener 3 retracts (rises), and at the same time, the opening and closing gate drive cylinder 224 operates to momentarily push out (close) the opening and closing gate 223. At the same time, the retaining pin 251a of the fastener retaining device 251 is pulled out, and the fastener 3 is pushed out and placed on the opening and closing gate 223. Meanwhile, the adjacent fastener 3 moves to the position of the fastener retaining device 251, and the retaining pin 251a is inserted into the pin hole 11 and remains in that position. The above-mentioned operation is repeated to perform the joining work of the rebar intersections using the joining tools 3 one after another.

[0031] Figure 8 shows a modified example of the opening and closing gate. The height position of the upper surface of this opening / closing gate 223' is lower than the height position of the lower surface of the inner surface of the horizontal fastener magazine 212 by a step h. As a result, when the fastener 3 is placed on the opening / closing gate 223', it can be said that it is accurately positioned in accordance with the position of the fastener pushing portion 225a of the fastener pushing cylinder 225. [Example]

[0032] 9 to 12 show a second embodiment of the reinforcing bar intersection joining device of the present invention. Figure 9 shows a schematic diagram of the overall configuration of a reinforcing bar intersection connection equipment 621, which is composed of a plurality of reinforcing bar intersection connection devices 421 that automatically connect the reinforcing bar intersections of reinforcing bars 1 and 2 (horizontal reinforcing bars 1 and vertical reinforcing bars 2) arranged in a grid pattern on a reinforcing bar intersection assembly table 200 (described later in Figure 13) using, for example, the reinforcing bar connectors 3 described above. Figure 9(a) is a plan view, (b) is a front view, and (c) is a right side view.

[0033] The reinforcing bar intersection joining device 421 will be described with reference to FIGS. Figure 10(a) is a side view of the reinforcing bar intersection connecting device 421, and (b) is a front view (left side view of Figure 10(a)) of the reinforcing bar intersection connecting device 421 omitting the connecting tool temporary support cylinder device 233 described later. The horizontal fastener magazine 212' in this reinforcing bar intersection fastener device 421 is The upper and lower portions directly above the rebar intersections are openings 212a and 212b, similar to the horizontal fastener magazine 212 described above, but a fastener temporary support cylinder device 233 equipped with a piston rod 233a that can be inserted into the lower rebar insertion space 6 of the rebar fastener 3 is provided on the outside of a tube bottom equivalent portion 212c' that forms the tube end adjacent to the openings 212a and 212b. 233b denotes a piston rod insertion hole.

[0034] The reinforcing bar crossing joining operation in the reinforcing bar crossing joining device 421 is carried out as follows. At the start, no fastener 3 is present directly below the fastener pushing portion 225a of the fastener pushing cylinder 225, and only the fastener 3 on the coil spring 221 side of the fastener 3 held by the retaining pin 251a is present. In this state, the piston rod 233a of the fastener temporary support cylinder device 233 is extended. When the retaining pin 251a inserted into the pin hole 11 of the waiting fastener 3 is pulled out, the fastener 3 is urged by the coil spring 221 and moves forward instantaneously, and the lower rebar insertion hole 6 of the fastener 3 fits onto the piston rod 233a (the fastener is supported by the piston rod 233a). At that moment, the fastener push-out cylinder 225 operates, causing the fastener push-in part 225a to descend and come into contact with the upper end of the fastener 3, and at the same time, the piston rod 233a of the fastener temporary support cylinder device 233 instantaneously retracts, causing the fastener push-in part 225a of the fastener push-out cylinder 225 to push the fastener 3 into the rebar intersection. In this way, the fastener 3 joins the lower rebar 2 and the upper rebar 1 at the rebar intersection. When the fastener pushing portion 225a that has pushed in the fastener 3 rises instantaneously, the piston rod 233a of the fastener temporary support cylinder device 233 immediately moves forward, and the adjacent fastener 3 that has been waiting in a standby state has its retaining pin 251a pulled out and immediately moves forward, and is now supported by the piston rod 233a that has entered the lower rebar insertion hole 6. Thereafter, in the same manner, the joining operation of the lower reinforcing bars 2 and the upper reinforcing bars 1 at their intersecting portions using the joining tools 3 is continuously repeated.

[0035] The only differences between the reinforcing bar intersection connecting device 321 and reinforcing bar intersection connecting device 421 described above are the portions near the tips of the fastener magazines 212, 212', i.e., the difference in the structure of the tips of the fastener magazines 212, 212' themselves, and the difference between the mechanism using the opening / closing gate drive cylinder 224 and the mechanism using the connection part temporary support cylinder 233. Therefore, it is also possible to make the tip of the fastener magazine a separate part from the main body of the fastener magazine, and to have the opening / closing gate drive cylinder 224 or the connection part temporary support cylinder 233 integral with this separate fastener magazine tip part, in other words, a magazine tip structure with a temporary fastener holding function. In this case, instead of the method of the embodiment in which fasteners 3 are supplied from the fastener input zone 226 into the fastener magazines 212, 212', a fastener supply method in which the fastener magazine main body portion containing multiple fasteners 3 is replaced (fastener magazine main body portion replacement method) can be adopted. In addition, by replacing the structure of the magazine tip with a temporary fastener holding function, it is possible to easily adopt any type of rebar cross-section fastener. In this case, it is possible to switch to the appropriate type of rebar cross-section fastener depending on various conditions and situations, such as the shape and size of the rebar fastener or the size of the rebar. [Example]

[0036] Figures 13(a), (b), and (c) show an example of a rebar intersection assembly table 200 for arranging vertical and horizontal rebars to be joined at the rebar intersection with connectors 3 using rebar intersection joining devices 321 and 421 in the rebar intersection joining equipment 521 and 621 of Figures 3 and 9, where (a) is a plan view, (b) is a front view, and (c) is a side view. Reference numeral 210 in the drawing denotes a magazine rack that can move sequentially and supports a plurality of fastener magazines 212, 212' in each rebar intersection fastening device 321, 421. Each time the magazine rack 210 finishes connecting a row of rebar intersections, it moves forward to the next row position by a magazine rack drive mechanism (not shown) that drives the movable support parts 211 on both ends. The rebar cross-assembly table 200 of this embodiment is divided into four sections and comprises pillars 201 on all four sides, outer frame members 202a, 202b on all four sides supported by the pillars 201, and inner frame members 203a, 203b connecting the central sections vertically and horizontally. The rebars can be placed across the entire surface, in one section, in two vertical sections, or in two horizontal sections. In the illustrated example, vertical and horizontal reinforcing bars are placed on the four outer frame members 202a and 202b, and in the illustrated example, the outer frame members 202a and 202b are provided with replaceable, nested reinforcing bar holders 205. [Example]

[0037] Fig. 14 is a front view of a further embodiment of the reinforcing bar fastener of the present invention. When explaining the reinforcing bar fastener 3 alone, as in the case of Figs. 1 and 2, The figure showing the lower reinforcing bar insertion portion 7 on both sides will be explained as a front view. This reinforcing bar fastener 31 has protrusions 4a on both sides to support some of the weight of the upper reinforcing bar 1 when the upper reinforcing bar 1 is housed in the upper reinforcing bar insertion space 4 as shown in Figure 14. This protrusion has an arcuate surface at the part that comes into contact with the upper rebar 1, but has a roughly triangular cross section, and when inserting the upper rebar 1, it opens to the left and right to allow the rebar to be inserted. This protrusion 4a can reduce the weight of the upper rebar 1 acting on the lower rebar 2. [Example]

[0038] 15 shows yet another embodiment of the reinforcing bar fastener of the present invention, where (a) is a front view and (b) is a right side view. The entire upper surface of this reinforcing bar fastener 32 is a flat surface 7a'. That is, the height position of the flat portion 7a in Figures 1(a) and 1(b) is aligned with the height position of the arc-shaped apex of the upper reinforcing bar insertion portion 5. [Example]

[0039] In the above explanation, the upper and lower reinforcing bars 1 and 2 are perpendicular to each other, but as shown in FIG. 16, the present invention is also applicable to a case where the upper and lower reinforcing bars 1 and 2 intersect at an angle. Figure 16 (a) shows a plan view of the standard orthogonal intersection (90° intersection). Figure 16 (b) shows the case of a 60° intersection, Figure 16 (c) shows the case of a 45° intersection, and Figure 16 (d) shows the case of a 30° intersection. Figure 16 (e) shows a three-view drawing of the case of a 45° intersection. [Explanation of symbols]

[0040] 1 Upper rebar 2 Lower rebar 3 Rebar connectors (connectors) 4 Upper rebar insertion space 4a protrusion 5 Upper rebar insertion section 6 Space for inserting lower rebar 7 Lower rebar insertion part 7a Flat area 8 Bottom opening 11 Pinhole 321, 421 Reinforced concrete cross section connection device 521, 621 Reinforced concrete cross section connection equipment 212, 212' Horizontal coupling magazine 212b (upper) opening 212a (lower) opening 223, 223' Opening and Closing Gate 224 Opening and closing gate drive cylinder 224a Piston rod 225 Fitting push cylinder 225a Coupling push part 225b Piston rod 221 Connector lateral drive means (coil spring) 226 Fastener Insertion Zone 233 Cylinder device for temporary support of fasteners 251 Connector retention device 251a Detaining pin 200 Rebar cross assembly table 201 Pillar material 202a, 202b External frame material 203a, 203b Internal frame material 210 Magazine Rack

Claims

1. A reinforcing bar connector (3) made of a flexible material for connecting a reinforcing bar intersection between an upper reinforcing bar (1) and a lower reinforcing bar (2) that intersect with each other in a plan view, an upper reinforcing bar insertion portion (5) having an upper reinforcing bar insertion space (4) open on the lower side through which the upper reinforcing bar (1) passes; and a lower reinforcing bar insertion portion (7) provided on both the left and right sides of the upper reinforcing bar insertion space (4) and having a lower reinforcing bar insertion space (6) through which the intersecting lower reinforcing bar (2) passes, The lower reinforcing bar insertion space (6) has a lower opening (8) that is narrowed to such an extent that the lower reinforcing bar (2) can be pushed into the lower reinforcing bar insertion space (6) from below with elastic deformation, and has a downward C-shaped cross-sectional hole shape. The reinforcing bar fastener (3) has flat surfaces on both sides so that it can be smoothly slid and fed through the horizontal fastener magazine (212) of the automatic fastener binding device.

2. The reinforcing bar fastener (3) according to claim 1, characterized in that the upper surface of the upper reinforcing bar insertion portion (5) has a pin hole (11) into which a pin can be inserted to restrain movement of the reinforcing bar fastener (3).

3. A reinforcing bar fastener according to claim 1 or 2, characterized in that the lower end surface of the lower reinforcing bar insertion portion of the reinforcing bar fastener is not positioned below the lower surface of the lower reinforcing bar when the upper reinforcing bar and the lower reinforcing bar that intersect each other are inserted into the reinforcing bar fastener.

4. A reinforcing bar intersection connecting device (321) that connects a reinforcing bar intersection between an upper reinforcing bar (1) and a lower reinforcing bar (2) that intersect each other in a plan view using the reinforcing bar connecting device (3) according to any one of claims 1 to 3, a horizontal fastener magazine (212) having a horizontal cylindrical shape, capable of accommodating a plurality of the reinforcing bar fasteners (3) arranged side by side from a position directly above the reinforcing bar intersection, and having openings (212a) and (212b) at the upper and lower portions directly above the position; a fastener horizontal driving means (221) for sequentially moving the reinforcing bar fasteners (3) in the horizontal fastener magazine (212) from the end opposite the openings (212a) and (212b) toward the openings (212a) and (212b); an opening / closing gate (223) for temporarily supporting reinforcing bar fasteners, capable of opening and closing the lower opening (212a) of the horizontal fastener magazine (212); a cylindrical bottom portion (212c) adjacent to the openings (212a) and (212b) of the cylindrical horizontal fastener magazine (212) and forming a cylindrical end portion; a fastener pushing cylinder (225) having a downward piston rod (225b) attached with a fastener pushing portion (225a) that pushes down the reinforcing bar fastener 3 on the closed opening / closing gate (223) and pushes it into the reinforcing bar intersection at the same time as the opening / closing gate (223) opens; A reinforcing bar intersection connecting device comprising:

5. 5. A reinforcing bar intersection connecting device according to claim 4, wherein the height position of the upper surface of the opening / closing gate is lower than the height position of the lower surface of the inner surface of the horizontal fastener magazine (212) by a step.

6. A reinforcing bar intersection connecting device (421) that connects a reinforcing bar intersection between an upper reinforcing bar (1) and a lower reinforcing bar (2) that intersect each other in a plan view using the reinforcing bar connecting device (3) of claim 1 or 2, a horizontal fastener magazine (212') in the shape of a horizontal cylinder, capable of accommodating a plurality of the reinforcing bar fasteners (3) in a line on one side of the horizontal direction from a position directly above the reinforcing bar intersection, and having openings (212a) and (212b) at the upper and lower portions directly above the position; a fastener horizontal driving means (221) for sequentially moving the reinforcing bar fasteners (3) in the horizontal fastener magazine (212') from the end opposite the openings (212a) and (212b) toward the openings (212a) and (212b); a fastener temporary support cylinder device (233) provided on the outside of a cylindrical bottom equivalent portion (212c') forming a cylindrical end portion adjacent to the openings (212a) and (212b) in the cylindrical horizontal fastener magazine (212'), the fastener temporary support cylinder device (233) having a piston rod (233a) insertable into a lower reinforcing bar insertion space (6) of the reinforcing bar fastener (3); a fastener pushing cylinder (225) having a downward piston rod (225b) attached with a fastener pushing portion (225a) that pushes down the reinforcing bar fastener (3) supported by the piston rod (233a) inserted into the lower reinforcing bar insertion space (6) while simultaneously retracting the piston rod (233a), thereby pushing the reinforcing bar fastener into the reinforcing bar intersection; A reinforcing bar intersection connecting device comprising:

7. The reinforcing bar intersection connecting device according to any one of claims 4 to 6, characterized in that when the reinforcing bar fastener (3) of claim 2 is used as the reinforcing bar fastener (3), a pin that can be inserted into or removed from the pin hole (11) of the reinforcing bar fastener (3) located adjacent to the lower opening (212a) in the horizontal fastener magazine (212), (212').

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