Reinforcing bar connector and reinforcing bar intersection connector

Abstract

To provide a reinforcing bar coupler 3 capable of coupling reinforcing bar crossing portions with a simple operation of simply pushing the reinforcing bar coupler from above, and a reinforcing bar crossing portion coupling device 71 that can be realized at a low cost using the reinforcing bar coupler.SOLUTION: The reinforcing bar coupler has an upper reinforcing bar inserting portion 5 and a lower reinforcing bar inserting portion 7 having a lower reinforcing bar inserting space 6 having a downward C-shaped cross-sectional hole shape. A flat portion 7a is provided on the upper surface of the lower reinforcing bar inserting portion 7, and locking recesses 9 are provided on both side surfaces of the reinforcing bar coupler 3. The reinforcing bar crossing portion coupling device 71 includes a coupler magazine 12 for vertically storing a coupler, lowermost coupler receiving means 14, second-coupler-from-the-bottom receiving means 16, temporary receiving means 18 for temporarily receiving the released and dropped reinforcing bar coupler, a coupler pushing cylinder 21 having a coupler pushing portion 21a attached to the tip, magazine lifting means 20, and magazine laterally moving means 23 for laterally moving the coupler magazine 12 integrally with the coupler pushing cylinder 21 so that the coupler pushing portion 21a is positioned above the reinforcing bar coupler.SELECTED DRAWING: Figure 4A

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 upper surface of the lower reinforcing bar insertion portion 7 has a flat portion 7a that allows reinforcing bar fasteners 3 of the same shape to be stacked on top of each other.

[0011] Claim 2 provides the reinforcing bar fastener of claim 1, The reinforcing bar fastener 3 has flat sides on both sides, and is characterized by having locking recesses 9 that allow locking pieces 14a, 16a to fit into the flat sides and prevent the reinforcing bar fastener 3 from moving downward.

[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 (71) that connects 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 using the reinforcing bar fastener (3) according to any one of claims 1 to 3, a cylindrical fastener magazine 12 that can store a plurality of the reinforcing bar fasteners stacked vertically above the reinforcing bar intersection; a bottom fastener receiving means 14 for receiving and releasably receiving the bottom reinforcing bar fastener housed in the fastener magazine 12; a second-lowest fastener receiving means 16 for receiving and releasably receiving the second-lowest reinforcing bar fastener; temporary receiving means 18 for temporarily receiving the reinforcing bar fasteners that have been released and dropped from the lowest fastener receiving means 14 from the left and right at positions where the reinforcing bar fasteners do not reach the reinforcing bar intersections; a fastener pushing cylinder 21 integrally attached to the side of the fastener magazine 12 and having a downward piston rod 21b with a fastener pushing portion 21a attached to the tip thereof; a magazine lifting means 20 for driving the fastener magazine 12 up and down; The fastener magazine 12 is characterized by being provided with a magazine lateral movement means 23 that moves the fastener magazine 12 laterally together with the fastener pushing cylinder 21 so that the fastener pushing portion 21a of the fastener pushing cylinder 21 is positioned above the rebar fastener.

[0014] The invention of claim 5 is as follows: The cross section of the upper rebar 1 and the lower rebar 2 that cross each other in a plan view A reinforcing bar intersection connecting device 81, 81' that connects using the reinforcing bar fastener 3 of any one of claims 1 to 3, a cylindrical, fixed fastener magazine 32 with a bottom plate 32a that is located above the rebar intersection and on one side of the rebar intersection in the horizontal direction, and that can store a plurality of rebar fasteners stacked vertically; a second-lowest fastener receiving means 36 for receiving and releasably receiving the second-lowest reinforcing bar fastener housed in the fastener magazine 32; The fastener magazine 32 has a front lower opening 32c in the front wall of the lateral front and rear walls near the bottom, through which the lowest reinforcing bar fastener 3 can pass, A fastener pushing-out cylinder 39 for pushing out the reinforcing bar fastener from the front lower opening 32c is provided on the outside of the rear lower opening provided on the rear side wall on the opposite side, The push-out plate 45 is fixed to the piston rod of the fastener push-out cylinder 39 and has a surface that pushes out only the lowest reinforcing bar fastener 3, The reinforcing bar fastener 3 extruded by the extrusion plate 45 has a receiving portion 44 for receiving the reinforcing bar fastener 3 so that the reinforcing bar fastener 3 is positioned directly above the reinforcing bar intersection portion, The reinforcing bar connector 3 received by the receiving portion 44 is pushed into the reinforcing bar intersection from above by a connector pushing cylinder 41. It is characterized by:

[0015] Claim 6 provides the reinforcing bar crossing portion connecting device according to claim 5, A rod-shaped member 46 having a position and outer diameter that allows it to be inserted into the upper reinforcing bar insertion space of the reinforcing bar fastener 3 is fixed to the front surface of the push-out plate 45.

[0016] The invention of claim 7 is as follows: A reinforcing bar intersection connecting device 91 that connects an intersection of 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 cylindrical fastener magazine 52 capable of storing a plurality of the reinforcing bar fasteners stacked vertically above the reinforcing bar intersection; a bottom fastener receiving means 54 for receiving and releasably receiving the bottom reinforcing bar fastener housed in the fastener magazine 52; a second-lowest fastener receiving means 56 for receiving and releasably receiving the second-lowest reinforcing bar fastener; a temporary receiving means 58 for temporarily receiving the reinforcing bar fastener that has been released from the lowest fastener receiving means 54 and fallen from the left and right sides at a position where the reinforcing bar fastener does not reach the reinforcing bar intersection; a magazine lifting means 50 for driving the fastener magazine 52 up and down; The fastener magazine 52 is characterized by being provided with a fastener pushing cylinder 51 which is provided so as to be able to move laterally to a position directly above the rebar intersection when the fastener magazine 52 is raised, and which has a downward piston rod 51b with a fastener pushing portion 51a attached to its tip. [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) The upper surface of the reinforcing bar insertion section 7 has a flat section 7a that allows reinforcing bar fasteners 3 of the same shape to be stacked, so that it is possible to use a vertical fastener supply section (fastener magazines 12, 32, 52 in the embodiments) as a reinforcing bar intersection fastening device that sequentially supplies a large number of stacked reinforcing bar fasteners starting from the bottom. (b) Since both sides of the reinforcing bar fastener 3 are flat, it is possible to use the vertical fastener supply section (fastener magazines 12, 32, 52 in the embodiment) as described above as a reinforcing bar intersection fastening device. (c) 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, so that the upper and lower reinforcing bars can be joined by simply 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, the reinforcing bar fastener 3 having the locking recesses 9 on both sides thereof can appropriately and easily provide a means for temporarily receiving the fasteners 3 stored in the vertical fastener magazines 12, 32, 52, as in the fastener receiving means 16, 36, 56 of the reinforcing bar intersection fastener devices 71, 81, 91 described below. 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 devices 71, 91 of the invention of claim 4 or claim 7, the fastener supply section that supplies the reinforcing bar fasteners is a vertical fastener magazine 12, 52, and by operating two fastener receiving means 14, 16 that releasably receive the lowest reinforcing bar fastener and the second-lowest reinforcing bar fastener stored in this fastener magazine 12, fasteners 3 are dropped one by one from the vertical fastener magazines 32, 52, and by having temporary receiving means 18, 58 that temporarily receive the dropped fasteners 3, With an extremely simple configuration, the device automatically drops a large number of fasteners 3 one by one and pushes them into the intersections of the rebars, thereby realizing the operation of joining the upper and lower rebars. That is, the structure is such that the effects (a), (b), and (c) of the reinforcing bar fastener 3 are realized to the greatest extent possible. The reinforcing bar intersection connecting device 71 of claim 4 and the reinforcing bar intersection connecting device 91 of claim 7 are configured such that one moves the fastener magazine 12 laterally and the other raises and lowers the fastener magazine 52, but they can be appropriately selected depending on the environment of the installation location of the reinforcing bar intersection connecting equipment 171, 191, the structure of the reinforcing bar intersection assembly table 200 explained in Figure 14, and other circumstances.

[0020] According to the reinforcing bar intersection joining device 81 of the invention of claim 5, the fastener supply section that supplies reinforcing bar fasteners is a vertical fastener magazine 32 that does not move up and down or left and right, and fasteners 3 are slid sideways one by one from the bottom end of this vertical fastener magazine 32 to be positioned outside the fastener magazine 32, and these fasteners 3 positioned on the outside are then pushed into the reinforcing bar intersection by the fastener pushing cylinder 41.In particular, with a simple configuration in which the fastener magazine does not move, the device automatically drops a large number of fasteners 3 one by one and pushes them into the reinforcing bar intersection, thereby realizing the operation of joining the upper and lower reinforcing bars. That is, the structure is such that the effects (a), (b), and (c) of the reinforcing bar fastener 3 are realized to the greatest extent possible.

[0021] In the reinforcing bar intersection connecting device described in claims 4 to 7, if the target reinforcing bar connecting device 3 has the structure described in any one of claims 1 to 3, it is easy to configure a mechanism for automatically connecting reinforcing bars, and automatic connecting work can be performed efficiently. [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] FIG. 10 is a schematic diagram showing the overall configuration of a reinforcing bar intersection connecting equipment 171, which is configured by installing a plurality of reinforcing bar intersection connecting devices 71 of the first embodiment, which automatically connect the reinforcing bar intersections of upper and lower reinforcing bars using the reinforcing bar connecting tool 3 described above, where (a) is a plan view, (b) is a front view of (a), and (c) is a right side view of (a). [Figure 4A] 4A to 4D are enlarged right side views illustrating the configuration and operation of one reinforcing bar intersection joining device 71 in FIG. 3, and FIG. 4A shows the initial state when the reinforcing bar intersection joining operation begins. [Figure 4B] 4B is a diagram showing a second stage of the rebar intersection joining operation following the initial state of FIG. 4A. [Figure 4C] 4C is a diagram showing a third stage of the rebar intersection joining operation, which follows the second stage of FIG. 4B. [Figure 4D] 4D is a diagram showing a fourth stage (a state in which fastener 3 is pushed into the rebar intersection and fastened) following the third stage of FIG. 4C in the rebar intersection fastening operation. FIG. [Figure 5]1 is a schematic diagram showing the overall configuration of a reinforcing bar intersection joining equipment 181, which is configured by installing a plurality of reinforcing bar intersection joining devices 81 (81') of the second embodiment, which automatically join the reinforcing bar intersections of upper and lower reinforcing bars with the reinforcing bar joining tool 3 described above, where (A) is a plan view, (B) is a front view of (A), and (C) is a right side view of (A). [Figure 6A] Figures 6A(a), 6B, 6C, and 6D are enlarged front views explaining the configuration and operation of one reinforcing bar intersection joining device 81 in Figure 5, and Figure 6A shows the initial state at the start of the reinforcing bar intersection joining operation. Figure 6A(b) is a right side view of (a), and Figure 6A(c) is a side view showing only the joining tool push-out cylinder 41 in (a). [Figure 6B] 6B is a diagram showing a second stage state following the initial state of FIG. 6A in the rebar intersection joining operation. [Figure 6C] 6C is a diagram showing a third stage of the rebar intersection joining operation, which follows the second stage of FIG. 6B. [Figure 6D] 6B is a diagram showing the fourth stage (the moment when the fastener 3 is pushed into the rebar intersection and fastened) following the third stage of FIG. 6C in the rebar intersection fastening operation (the state then returns to the initial state of FIG. 6A). [Figure 7] This is an enlarged view of a third embodiment (reinforcing bar intersection connecting device 81'), which is another embodiment of the reinforcing bar intersection connecting device in Figure 5, where (a) is a front view of the initial state when the reinforcing bar intersection connecting operation begins, (b) is a side view, and (c) is a side view showing only the connecting tool extrusion cylinder 41' in (a). [Figure 8] This figure shows the state in which the fastener 3 has been moved from the initial state of Figure 7 to a position directly above the intersection of the rebars (Figures 8(a) and (c) are drawing numbers corresponding to Figures 7(a) and (c)). [Figure 9] 10 is a schematic diagram showing the overall configuration of a reinforcing bar intersection joining equipment 191, which is configured by installing a plurality of reinforcing bar intersection joining devices 91 of the fourth embodiment, which automatically join the reinforcing bar intersections of upper and lower reinforcing bars with the reinforcing bar joining tool 3 described above, 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 right side view explaining the configuration and operation of one reinforcing bar intersection joining device 91 in Figure 9, and shows the initial state when the reinforcing bar intersection joining operation begins, and (b) is a front view of the main parts of (a). [Figure 11] 11A is a view showing a second stage of the reinforcing bar intersection joining operation following the initial state of FIG. 10, and FIG. 11B is a front view of the main part of FIG. [Figure 12] 12 is a view showing a third stage following the second stage of FIG. 11 in the reinforcing bar intersection joining operation, and FIG. 12(b) is a front view of the main part of FIG. [Figure 13] 13 is a diagram showing a fourth stage (a state immediately before fastener 3 is pushed into the rebar intersection) following the third stage of FIG. 12 in the rebar intersection fastening operation. FIG. [Figure 14] 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 15] FIG. 10 is a front view showing a reinforcing bar fastener 31 according to another embodiment of the present invention. [Figure 16] 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 17] 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). The upper surface of the lower reinforcing bar insertion portion 7 has a flat portion 7a that allows for stacking of reinforcing bar fasteners 3 of the same shape as the reinforcing bar fastener 3. In the illustrated example, the entire upper surface of the lower reinforcing bar insertion portion 7 is flat, but it is sufficient if there is a flat surface of a certain width at least in the center of the width direction in the side view. In addition, both sides of the reinforcing bar fastener 3 have locking holes 9 into which locking pieces (not shown) (for example, locking pieces such as stop pins 14a and 16a in FIG. 4A, described later) can fit to prevent the reinforcing bar fastener 3 from falling. The locking holes 9 in the illustrated example are conical holes, but the shape is not particularly limited. Also, they may be groove-shaped instead of holes. Note that in the drawings of this application, locking holes 9 that should be shown with dashed lines may be shown with solid lines (because they are very small parts and it is difficult to show them with dashed lines). 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, simply by pushing the reinforcing bar connector 3 into the reinforcing bar intersection, the upper and lower reinforcing bars can be connected. [Example]

[0026] FIG. 3 and FIGS. 4A to 4D 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 171, which is composed of a plurality of reinforcing bar intersection connection devices 71 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 14) 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 71 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 14, the reinforcing bar intersection connecting equipment 171 (and reinforcing bar intersection connecting equipment 181, 191 described later) supports fastener magazines 12 (and fastener magazines 32, 52 described later) of multiple reinforcing bar intersection connecting devices 71 (and reinforcing bar intersection connecting devices 81, 91 described later) on a magazine rack 210, and moves sequentially as shown by the arrows, 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 71 will be described with reference to FIGS. 4A to 4D. As shown in FIG. 4A, this reinforcing bar intersection fastening device 71 includes a rectangular cylindrical fastener magazine 12 that can accommodate multiple fasteners 3 slidably stacked vertically above a reinforcing bar intersection between an upper reinforcing bar 1 and a lower reinforcing bar 2 that intersect perpendicularly; a lowest fastener receiving means 14 for receiving and releasably receiving the lowest fastener 3 housed in the fastener magazine 12; a second-lowest fastener receiving means 16 for receiving and releasably receiving the second-lowest fastener 3; temporary receiving means 18 for temporarily receiving the fastener 3 that has been released from the lowest fastener receiving means 14 and fallen from the left and right sides at a position where the fastener 3 does not reach the rebar intersection; a fastener pushing cylinder 21 integrally attached to the side of the fastener magazine 12 and having a downward piston rod 21b with a fastener pushing portion 21a at its tip; a magazine lifting means 20 (described later) for driving the fastener magazine 12 up and down; The fastener magazine 12 is provided with a magazine lateral movement means 23 that moves the fastener magazine 12 laterally together with the fastener pushing cylinder 21 so that the fastener pushing portion 21a of the fastener pushing cylinder 21 is positioned above the fastener 3. In this application, when the term "cylinder" is used, such as a fastener pushing cylinder, it refers to a fluid pressure cylinder device, that is, an air cylinder device or a hydraulic cylinder device, but generally an air cylinder device is preferred. Further, at the bottom end of the fastener magazine 12, a bottom fastener receiving plate 17 is provided to prevent the fasteners 3 from falling. This bottom-tier fastener receiving plate 17 is used to keep the lowest fastener 3 in a fixed position, and also to close the bottom when a large number of fasteners 3 are initially placed into the fastener magazine 12. It can be opened and closed to the left and right by a retractable mechanism (not shown), and opens to both sides when the operation of pushing the bottom-tier fastener 3 into the rebar intersection begins, allowing the fastener 3 to drop, and then closes to receive the next fastener 3. Although the cross-sectional shape of the fastener magazine 12 is omitted, it has a rectangular cross section corresponding to the plan view of the fastener 3.

[0028] Various mechanisms are conceivable for enabling the fastener magazine 12 to move up and down and to the left and right. For example, in FIG. 4A, the device can be configured with magazine lateral movement means 23 having lateral drive cylinder 23a that can be driven left and right while fastener magazine 12 is held by holding member 23b, and magazine lifting means 20 provided with lifting drive cylinder 20a that can drive support base 20b that supports lateral drive cylinder 23a up and down. Also, a vertical and horizontal drive mechanism can be provided that holds the fastener magazine 12 and allows it to move both vertically and horizontally.

[0029] The fastener magazine 12 includes a lowest fastener receiving means 14 that releasably receives the lowest fastener 3 stored in the fastener magazine 12 with a locking pin 14a as a locking piece that can fit into the locking hole 9, and a second-from-the-bottom fastener receiving means 16 that similarly releasably receives the second-lowest fastener 3 with a locking pin 16a as a locking piece. The lowest fastener receiving means 14 and the second-from-the-bottom fastener receiving means 16 can be, for example, a fluid pressure cylinder device. Furthermore, instead of a fluid pressure cylinder, a mechanical mechanism may be used in which a locking piece (corresponding to a stop pin) that can be fitted into the locking hole 9 provided in the coupling 3 is moved in and out of the locking hole 9. The above-mentioned lowest-stage fastener receiving plate 17 can be substituted for the lowest-stage fastener receiving means 14, which is a fluid pressure cylinder device or the like.

[0030] The temporary receiving means 18 has a pair of receiving cylinders 25 arranged on the left and right, and each receiving cylinder 25 has a piston rod 25a to the tip of which a receiving plate 18a with an open top is attached. At the moment when fastener 3 falls from fastener magazine 12, piston rod 25a is extended and receiving plates 18a sandwich fastener 3. Alternatively, receiving plates 18a may be moved in advance to a position close to the side of fastener 3, so that fastener 3 is sandwiched by receiving plates 18a at the moment when fastener 3 falls from fastener magazine 12. Also, the lower end of each receiving plate 18a may be bent slightly inward into an L-shape so that fastener 3 is received by the L-shaped portion.

[0031] In the above-mentioned reinforcing bar intersection joining device 71, the procedure for pushing the joining tool 3 into the reinforcing bar intersection between the upper reinforcing bar 1 and the lower reinforcing bar 2 to join the upper and lower reinforcing bars 1, 2 will be described with reference to Figs. 4A to 4D. A large number of fasteners 3 are stacked vertically and stored in the fastener magazine 12. There is no particular limit to the number of fasteners stored, but a magazine that can store, for example, 50 to 100 fasteners is envisioned. FIG. 4A shows the initial state when the lowest fastener 3 in the fastener magazine 12 is pushed into the rebar intersection. In the initial state, the lowest fastener receiving means 14 and the second lowest fastener receiving means 16 are in a state of holding the fastener 3. In the figure, the second-lowest fastener receiving means 16 is shown in a state of not holding the fastener 3 in order to show that the fastener receiving means can be in a state of holding the fastener 3 or in a state of being released, but at this point all of them are holding the fastener 3.

[0032] At this time, almost simultaneously with the retraction of the stop pins 14a of the left and right lowest-stage fastener receiving means 14, the fall prevention gates 17 open to the left and right, allowing the lowest-stage fastener 3 to fall. The fallen fastener 3 is received by the left and right temporary receiving means 18 (the state shown in FIG. 4B, which will be explained next). After the lowest fastener 3 falls from the fastener magazine 12, the second-lowest fastener 3 received by the second-lowest fastener receiving means 16 is immediately released and falls, but is immediately received at the lowest position by the fall prevention gate 17 which closes immediately, and at the same time, the stop pin 14a moves forward, resulting in the same state as in Figure 4A.

[0033] Next, the lifting drive cylinder 20a of the magazine lifting means 20 is actuated to lift the fastener magazine 12. In this case, the fastener magazine 12 is lifted together with the magazine lateral movement means 23 (the holding member 23b that holds the fastener magazine 12 and the lateral drive cylinder 23a). FIG. 4B shows a state in which the dropped lowest fastener 3 is received by the receiving plate 18a of the temporary receiving means 18, and the fastener magazine 12 has risen to its upper limit.

[0034] Next, the lateral drive cylinder 23a of the magazine lateral movement means 23 is actuated to move the fastener magazine 12 to the left to the position shown in Fig. 4C. That is, the fastener pushing portion 21a at the tip of the piston rod 21b of the fastener pushing cylinder 21, which moves integrally with the fastener magazine 12, moves to a position directly above the fastener 3 held by the temporary receiving means 18.

[0035] Next, as shown in Figure 4D, when the fastener pushing cylinder 21 is activated and the fastener pushing portion 21a at the tip of the piston rod 21b pushes the fastener 3 downward, the fastener 3 is pushed into the rebar intersection between the upper rebar 1 and the lower rebar 2, joining the upper rebar 1 and the lower rebar 2. In this case, while the fastener 3 is held between the left and right receiving plates 18a of the temporary receiving means 18, it can be slid and pushed into the receiving plates 18a (the left and right receiving plates 18a are held with enough force to allow the fastener 3 to descend).

[0036] Next, the piston rod 21b of the fastener pushing cylinder 21 is retracted (the state of FIG. 4C), and then the magazine lateral movement means 23 is actuated to move (return) the fastener magazine 12 to the position of FIG. 4B. Next, the magazine lifting means 20 is actuated to lower the fastener magazine 12, returning it to the initial state of FIG. 4A. The reinforcing bar intersection joining device 71 of this embodiment has the configuration as described above, and can be said to be a reinforcing bar intersection joining device of a magazine vertical / horizontal movement type. [Example]

[0037] 5, 6A, 6B, 6C and 6D show a second embodiment of the reinforcing bar intersection connecting device of the present invention. Figure 5 is a schematic diagram showing the overall configuration of a reinforcing bar intersection connecting equipment 181, which is composed of a plurality of reinforcing bar intersection connecting devices 81 (81') different from the reinforcing bar intersection connecting device 71 described above, which automatically connects 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 14 using the reinforcing bar connecting devices 3 described above. Figure 5(a) is a plan view, (b) is a front view, and (c) is a right side view. Similar to the first embodiment, this reinforcing bar intersection connecting device 81 (81') is a reinforcing bar intersection connecting device that can connect the reinforcing bar intersection of 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 aforementioned reinforcing bar connector 3.

[0038] The reinforcing bar intersection joining device 81 will be described with reference to FIGS. 6A to 6D. The fastener magazine 32 in this reinforcing bar intersection connecting device 81 is cylindrical with a bottom plate, and as shown in Figure 6A (a), it is not located directly above the reinforcing bar intersection between the upper reinforcing bar 1 and the lower reinforcing bar 2, but is located on one side of the reinforcing bar intersection in the horizontal direction (the right side in Figure 5 (b) and Figure 6A (a)), and does not move in position (it does not move up and down or sideways). The fastener magazine 32 has a horizontal front wall 32b near the bottom thereof which has an opening (front wall lower opening) 32c through which the lowest fastener 3 can pass. As mentioned above, the horizontal direction refers to the left and right directions in Figures 5(B) and 6A(A), but the forward horizontal direction refers to the left in Figures 5(B) and 6A(A), and the rear horizontal direction refers to the right in Figures 5(B) and 6A(A).

[0039] An opening (rear wall lower opening) 32e is provided at the lower end of the lateral rear wall 32d of the fastener magazine 32, and a fastener pushing cylinder 39 for pushing fasteners out of the opening 32c in the front wall 32b is provided on the rear wall 32d. The fastener pushing cylinder 39 in the illustrated example is attached to a support base 43 fixed to the rear wall 32d of the fastener magazine 32. A plate-shaped push-out plate 45 is attached to the tip of the piston rod 39a of this fastener push-out cylinder 39, pushing out the lowest fastener 3 in the fastener magazine 32, and a rod-shaped member 46 with an outer diameter large enough to pass through the upper rebar insertion space 4 is fixed to the front of this push-out plate 45 at a position where it can be inserted through the upper rebar insertion space 4 of the rebar fastener 3. As shown in Figure 6A (b), the push-out plate 45 has a shape with a surface that pushes out only the lowest fastener 3 without coming into contact with the second-lowest fastener 3. The portion showing the push-out plate 45 in FIG. 6A(b) is shown in the AA cross section of FIG. 6A(a).

[0040] The fastener push-out cylinder 39 has a receiving section 44 that receives the fastener 3 pushed out from the fastener magazine 32, and a fastener push-in cylinder 41 that pushes the fastener 3 received by this receiving section 44 into the rebar intersection from above to join the upper and lower rebars. The fastener pushing cylinder 41 has a fastener pushing portion 41a attached to the tip of its piston rod 41b, which pushes down the fastener 3. The fastener pushing cylinder 41 in the illustrated example is attached to the front wall 32b of the fastener magazine 32. The receiving portion 44 is provided as a part of a frame 40 fixed to the front wall 32 b of the fastener magazine 32 in a manner surrounding the fastener pushing cylinder 41 . 6A(b), reference numeral 36 denotes second-from-the-bottom fastener receiving means for receiving and releasably receiving the second-from-the-bottom fastener 3 housed in the fastener magazine 32, and the receiving is performed by pushing in a retractable stop pin 36a. As in the case described above, this second-from-the-bottom fastener receiving means 36 can be, for example, a fluid pressure cylinder device.

[0041] In the above-mentioned reinforcing bar intersection joining device 81, the procedure for pushing the joining tool 3 into the reinforcing bar intersection between the upper reinforcing bar 1 and the lower reinforcing bar 2 to join the upper and lower reinforcing bars 1, 2 will be described with reference to Figs. 6A to 6D. A large number of fasteners 3 are stored vertically stacked in the fastener magazine 32. This fastener magazine 32 does not move, i.e., it does not move up and down or left and right. 6A (a) and (b) show the initial state when the lowest fastener 3 in the fastener magazine 32 is pushed into the rebar intersection. In this state, the second-lowest fastener 3 is held by the second-lowest fastener receiving means 36. The lowest fastener 3 in the fastener magazine 32 is moved in the following procedure, and this fastener 3 is used to fasten the rebar intersections of the upper and lower rebars 1 and 2. First, the coupler push cylinder 39 is actuated to advance the integral push plate 45 and rod member 46 forward. 6B shows the state when the push-out plate 45 comes into contact with the side of the fastener 3. In this case, the rod-shaped member 46 fixed to the front surface of the push-out plate 45 passes through the upper reinforcing bar insertion space 4 of the fastener 3, as shown in FIG. 6C, the pusher plate 45 moves forward, and the fastener 3 is brought into contact with the receiving portion 44, whereupon the fastener 3 is positioned directly above the intersection (the intersection of the upper rebar 1 and the lower rebar 2). In this case, the tip of the rod-shaped member 46 fits into the recess 44a provided in the receiving portion 44, thereby accurately positioning the fastener 3 (positioning perpendicular to the plane of the paper). At the same time that the fastener 3 hits the receiving portion 44, the pushing cylinder 41 is actuated to lower the fastener pushing portion 41a, and at the same time the fastener extrusion cylinder 39 is actuated to retract the piston rod 39a. As a result, as shown in Figure 6D, the fastener 3 pushed in by the fastener pushing portion 41a joins the intersection of the upper rebar 1 and the lower rebar 2. This completes the rebar intersection joining operation by the joining tool 3 at the bottom, and each part returns to its initial state (initial state in FIG. 6A(A)) as shown in the initial state in FIG. 6A(A). At this point in time, the fastener 3 that was previously second from the bottom becomes the lowest fastener 3. In this case, the stop pin 36a that has retracted from the second-lowest fastener 3 protrudes into the locking hole 9 of the fastener 3 that falls from above and receives it as the fastener 3 falls (this fastener 3 becomes the second-lowest fastener 3). This completes the rebar crossing joining operation by the joining tool 3 at the bottom, and each part returns to its initial state (initial state in FIG. 6A). The reinforcing bar intersection joining device 81 of this embodiment has the configuration as described above, and can be said to be a reinforcing bar intersection joining device of the magazine fixed type (or magazine position immovable type). [Example]

[0042] The reinforcing bar intersection connecting device 81' of the embodiment shown in Figures 7 and 8 has the same basic structure as the reinforcing bar intersection connecting device 81 of the second embodiment described in Figures 5 and 6A to 6D, but is a third embodiment of the reinforcing bar intersection connecting device 81' as a modified example thereof.

[0043] In other words, the fastener magazine 32' in this reinforcing bar intersection connecting device 81' is cylindrical with a bottom plate, and as shown in Figure 7 (a), it is not located directly above the reinforcing bar intersection between the upper reinforcing bar 1 and the lower reinforcing bar 2, but is located on one side of the reinforcing bar intersection in the horizontal direction (the right side in Figure 5 (b) and Figure 7 (a)), and does not move in position (it does not move up and down or sideways). The fastener magazine 32' has a horizontal front wall 32b' near the bottom thereof which has an opening (front wall lower opening) 32c' through which the lowest fastener 3 can pass. An opening 32e' is provided at the lower end of the rear wall 32d' in the lateral direction of the fastener magazine 32', and a fastener pushing cylinder 39' is provided for pushing fasteners out of the opening 32c' in the front wall 32b'. A support base 43' for this fastener pushing cylinder 39' is attached to the rear wall 32d' of the fastener magazine 32'.

[0044] A push-out plate 47 is attached to the tip of the piston rod 39a' of the fastener push-out cylinder 39' of this rebar intersection fastening device 81' simply to push out the fasteners in the fastener magazine 32'. As shown in Figure 7(B), this push-out plate 47 is a rectangular plate that does not protrude above the flat surfaces 7a (see Figure 1(A)) at the upper ends of the left and right lower rebar insertion portions 7 of the fastener 3. The push-out plate 47 portion in Figure 7(B) is shown in the BB cross section of Figure 7(A).

[0045] In the above-mentioned reinforcing bar intersection connecting device 81', the procedure for pushing the connecting tool 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, 2 will be described with reference to Figures 7 and 8. 7 shows the initial state when the lowest fastener 3 in the fastener magazine 32' is pushed into the rebar intersection. In this state, the second-lowest fastener 3 is held by the second-lowest fastener receiving means 36'. The lowest fastener 3 in the fastener magazine 32' is moved in the following procedure, and this fastener 3 is used to fasten the rebar intersections of the upper and lower rebars 1 and 2. First, the fastener push-out cylinder 39' is activated, and the push-out plate 47 pushes the lowest fastener 3 to the left in Figure 7(a). As shown in Figure 8, the fastener 3 hits the receiving portion 44' and moves to a position directly above the rebar intersection. At the same time as this occurs, the fastener pushing cylinder 41' operates, and the fastener pushing portion 41a' pushes the fastener 3 downward, forcing the fastener 3 into the intersection of the upper and lower rebars and joining them. Meanwhile, just before the fastener 3 is pushed downward, the fastener push-out cylinder 39' operates, and the push-out plate 47 moves backward. This completes the rebar crossing joining operation by the joining tool 3 at the bottom, and each part returns to its initial state (initial state in FIG. 7). At this point in time, the fastener 3 that was previously second from the bottom becomes the lowest fastener 3. The reinforcing bar intersection joining device 81' of this embodiment also has the configuration as described above, and is a reinforcing bar intersection joining device of the magazine fixed type (or magazine position immovable type). [Example]

[0046] 9 and 10 to 13 show a fourth embodiment of the reinforcing bar intersection joining device of the present invention. Figure 9 is a schematic diagram showing the overall configuration of a reinforcing bar intersection connecting equipment 191, which is composed of a plurality of reinforcing bar intersection connecting devices 91 different from the reinforcing bar intersection connecting devices 71, 81, 81' described above, which 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 14 using the reinforcing bar connecting devices 3 described above. Figure 9(a) is a plan view, (b) is a front view, and (c) is a right side view. This reinforcing bar intersection connecting device 91 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.

[0047] The reinforcing bar intersection joining device 91 will be described with reference to FIGS. As shown in Figures 10(a) and 10(b), this reinforcing bar intersection connecting device 91 includes a rectangular cylindrical fastener magazine 52 that can accommodate multiple fasteners 3 slidably stacked vertically above the reinforcing bar intersection between an upper reinforcing bar 1 and a lower reinforcing bar 2 that intersect perpendicularly; a lowest fastener receiving means 54 for receiving and releasably receiving the lowest fastener 3 housed in the fastener magazine 52; and a second-from-the-bottom fastener receiving means 56 for receiving and releasably receiving the second-from-the-bottom fastener 3. The device also includes temporary receiving means 58 that temporarily receives fasteners 3 that have been released from the lowest fastener receiving means 54 and fallen from the left and right sides at a position where the fasteners 3 do not reach the rebar intersections. The temporary receiving means 58 has a pair of receiving cylinders 55 arranged on the left and right, and each receiving cylinder 55 has a piston rod 55a to which a receiving plate 58a with an open top attached to the tip, is attached. The height position of the lower end of the fastener magazine 52 in the initial state of the embodiment corresponds to the height position of the temporary receiving means 58 in the illustrated example.

[0048] This reinforcing bar intersection fastening device 91 is provided with a magazine lifting means 50 for driving the fastener magazine 52 up and down. This fastener magazine 52 can only move up and down. The illustrated magazine lifting means 50 is configured to lift and lower a holding member 50c fixed to a fastener magazine 52 by a piston rod 50b of a magazine lifting drive cylinder 50a. Note that the magazine lifting means may be configured such that a magazine lifting drive cylinder is provided above the fastener magazine 52, or various other mechanisms.

[0049] At the bottom end of the fastener magazine 52, an openable and closable fall prevention gate 57 is provided to prevent the fasteners 3 from falling. This fall prevention gate 57 is used to keep the lowest fastener 3 in a fixed position, and also to close the bottom when a large number of fasteners 3 are initially placed into the fastener magazine 52. It can be opened and closed to the left and right by a retractable mechanism (not shown), and opens to both sides when the operation of pushing the lowest fastener 3 into the rebar intersection begins, allowing the fastener 3 to fall, and then closes to receive the next fastener 3.

[0050] On the right side of the view of the fastener magazine 52 in Figure 10(A) (upper side in the overall plan view of Figure 9(A)), there is a fastener pushing cylinder 51 having a downward-facing piston rod 51b with a fastener pushing portion 51a at its tip, and a fastener pushing cylinder lateral drive cylinder 53 that moves this fastener pushing cylinder 51 laterally so that the fastener pushing portion 51a is positioned directly above the rebar intersection. The piston rod is indicated by 53a. Note that the means for moving the fastener pushing cylinder 51 laterally is not limited to the fastener pushing cylinder lateral drive cylinder 53 shown in the figure, and various mechanisms are possible.

[0051] In the above-mentioned reinforcing bar intersection joining device 91, the procedure for pushing the joining tool 3 into the reinforcing bar intersection between the upper reinforcing bar 1 and the lower reinforcing bar 2 to join the upper and lower reinforcing bars 1, 2 will be described with reference to Figs. The fastener magazine 52 accommodates a large number of fasteners 3 stacked vertically. FIG. 10 shows the initial state when the lowest fastener 3 in the fastener magazine 52 is pushed into the rebar intersection. In the initial state, both the lowest fastener receiving means 54 and the second-lowest fastener receiving means 56 are in a state of holding the fastener 3 .

[0052] At this point, the stop pins 54a of the left and right lowest fastener receiving means 54 retract, and at the same time the fall prevention gates 57 open to the left and right, allowing the fastener 3 to fall, but at the same time the magazine lifting drive cylinder 50a operates to raise the fastener magazine 52, and the receiving plates 58a of the left and right temporary receiving means 58 instantly move forward to receive the fastener 3. The state at this point is shown in Figure 11.

[0053] After the lowest fastener 3 falls from the fastener magazine 52, the second-lowest fastener 3 received by the second-lowest fastener receiving means 56 is released and falls, but is immediately received at the lowest position by the closed fall prevention gate 57 and is supported by the advanced stop pin 54a of the lowest-level fastener receiving means 54.

[0054] As the fastener magazine 52 rises further as shown in Figure 12, the fastener pushing cylinder lateral drive cylinder 53 is activated, and the fastener pushing cylinder 51 moves laterally to directly below the fastener magazine 32 (directly above the fastener 3) as shown in Figure 13 (the fastener pushing portion 51a comes to be directly above the fastener 3). Next, the fastener pushing cylinder 51 is activated, and the fastener pushing portion 51a at the tip of its piston rod 51b pushes the fastener 3 downward, causing the fastener 3 to be pushed into the rebar intersection between the upper rebar 1 and the lower rebar 2, joining the upper rebar 1 and the lower rebar 2. The state near the joint at this time is the same as that shown in Figure 4D.

[0055] Thereafter, the piston rod 51b of the fastener pushing cylinder 51 retracts, the piston rod 53a of the fastener pushing cylinder horizontal drive cylinder 53 retracts, the fastener pushing cylinder 51 moves to the right, the fastener magazine 52 descends, and the fastener returns to the initial state shown in FIG. 10. The reinforcing bar intersection joining device 91 of this embodiment has the above-mentioned configuration, and can be said to be a vertical magazine movement type reinforcing bar intersection joining device. [Example]

[0056] Figures 14(a), (b), and (c) show an example of a rebar intersection assembly table 200 for arranging vertical and horizontal rebars to be connected at the rebar intersection with connectors 3 using each rebar intersection connecting device 71, 81, 81', and 91 in the rebar intersection connecting equipment 171, 181, 181', and 191 of Figures 3, 5, 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 12, 32, 32', 52 in each rebar intersection fastening device 71, 81, 81', 91. Each time the magazine rack 210 finishes fastening a row of rebar intersections, it moves forward to the next row position by a magazine rack drive mechanism (not shown) that drives 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]

[0057] Fig. 15 is a front view of yet another 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 15. 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]

[0058] 16 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. This reinforcing bar fastener 32 provides good stability when stacked vertically in a fastener magazine. [Example]

[0059] In the above explanation, the upper and lower reinforcing bars 1 and 2 are perpendicular to each other, but as shown in FIG. 17, the present invention is also applicable to a case where the upper and lower reinforcing bars 1 and 2 intersect at an angle. Figure 17 (a) shows a plan view of the standard orthogonal intersection (90° intersection). Figure 17 (b) shows the case of a 60° intersection, Figure 17 (c) shows the case of a 45° intersection, and Figure 17 (d) shows the case of a 30° intersection. Figure 17 (e) shows a three-view drawing of the case of a 45° intersection. [Explanation of symbols]

[0060] 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 9 Locking hole (locking recess) 71, 91 Reinforced concrete cross section connection device 171, 191 Reinforced concrete cross section connection equipment 12, 52 Binding magazine 14, 54 Lowermost coupling receiving means 14a, 54a Locking pin (locking piece) 16, 56 Second connector receiving means from the bottom 16a, 56a Locking pin (locking piece) 17, 57: Lowermost connector receiving plate (lowest connector receiving means) 18, 58 Temporary Reception Means 18a, 58a Receiving plate 20, 50 Magazine lifting means 20a, 50a lifting drive cylinder 20b, 50c support stand 21, 51 Joint pushing cylinder 21a, 51a Connector push part 21b, 51b Piston rod 23 Magazine lateral movement means 23a Lateral drive cylinder 23b holding member 25, 55 Receiving cylinder 25a, 55a piston rod 21, 51 Joint pushing cylinder 81, 81' Reinforcement bar intersection connection device 181, 181' Reinforced concrete cross section connection equipment 36 Second-lowest connector receiving means 36a Stop pin 32, 32' coupling magazine 32a, 32a' (of the fastener magazines 32, 32a') 32b, 32b' (of the coupling magazines 32, 32') front walls 32c, 32c' Lower openings (in front walls 32b, 32b') 32d, 32d' (rear wall of coupling magazine 32, 32') 32e, 32e' Lower openings (in rear walls 32d, 32d') 36, 36' Second bottom connector receiving means 39, 39' Coupler extrusion cylinder 39a, 39a' piston rod 40, 40' frame 41, 41' Joint pushing cylinder 41a, 41a' Connector push part 41b, 41b' piston rod 39, 39' Coupler extrusion cylinder 43, 43' support stand 44, 44' Receiving part 44a Recess 45 Push Plate 47 Extrusion Plate 46 Rod-shaped member 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. A reinforcing bar fastener characterized in that the upper surface of the lower reinforcing bar insertion portion (7) has a flat portion (7a) for stably stacking multiple reinforcing bar fasteners (3) in a magazine provided in an automatic binding device.

2. 2. The reinforcing bar fastener according to claim 1, wherein both side surfaces of the reinforcing bar fastener (3) are flat and have locking recesses (9) into which locking pieces (14a), (16a) for holding the reinforcing bar fastener (3) so as not to move downward are inserted.

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 (71) 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 cylindrical fastener magazine (12) capable of storing a plurality of the reinforcing bar fasteners in a vertically stacked manner above the reinforcing bar intersection; a bottom fastener receiving means (14) for receiving and releasably receiving the bottom reinforcing bar fastener housed in the fastener magazine (12); a second-lowest fastener receiving means (16) for receiving and releasably receiving the second-lowest reinforcing bar fastener; a temporary receiving means (18) for temporarily receiving the reinforcing bar fasteners that have been released and dropped from the lowest fastener receiving means (14) from the left and right sides at a position where the reinforcing bar fasteners do not reach the reinforcing bar intersections; a fastener pushing cylinder (21) integrally attached to the side of the fastener magazine (12) and having a downward-facing piston rod (21b) with a fastener pushing portion (21a) attached to the tip thereof; a magazine lifting means (20) for driving the fastener magazine (12) up and down; and a magazine lateral movement means (23) for laterally moving the fastener magazine (12) together with the fastener pushing cylinder (21) so that the fastener pushing portion (21a) of the fastener pushing cylinder (21) is positioned above the reinforcing bar fastener.

5. The rebar intersection between the upper rebar (1) and the lower rebar (2) that intersect each other in a plan view A reinforcing bar intersection connecting device (81), (81') that connects using the reinforcing bar connecting device (3) according to any one of claims 1 to 3, a cylindrical, fixed fastener magazine (32) with a bottom plate (32a) that is located above the rebar intersection and on one side of the rebar intersection in the horizontal direction and that can accommodate a plurality of rebar fasteners stacked vertically; a second-lowest fastener receiving means (36) for receiving and releasably receiving the second-lowest reinforcing bar fastener contained in the fastener magazine (32); The fastener magazine (32) has a front lower opening (32c) in the front wall of the lateral front and rear walls near the bottom, through which the lowest reinforcing bar fastener 3 can pass; A fastener pushing-out cylinder (39) for pushing out the reinforcing bar fastener from the front lower opening (32c) is provided on the rear side wall on the opposite side, outside the rear lower opening. The connector extrusion cylinder (39) has a push-out plate (45) fixed to the piston rod and having a surface for pushing out only the lowest reinforcing bar connector (3), The reinforcing bar connector (3) extruded by the extrusion plate (45) has a receiving portion (44) for receiving the reinforcing bar connector (3) so that the reinforcing bar connector (3) is positioned directly above the reinforcing bar intersection portion, The reinforcing bar connector (3) received by the receiving portion (44) is pushed from above into the reinforcing bar intersection to connect the upper and lower reinforcing bars. A reinforcing bar intersection connecting device characterized by the above.

6. 6. A reinforcing bar intersection connecting device according to claim 5, characterized in that a rod-shaped member (46) having a position and outer diameter that allows it to be inserted into the upper reinforcing bar insertion space of the reinforcing bar fastener (3) is fixed to the front surface of the push-out plate (45).

7. A reinforcing bar intersection connecting device (91) that connects an intersection of 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 cylindrical fastener magazine (52) capable of storing a plurality of the reinforcing bar fasteners stacked vertically above the reinforcing bar intersection; a bottom fastener receiving means (54) for receiving and releasably receiving the bottom reinforcing bar fastener housed in the fastener magazine (52); a second-lowest fastener receiving means (56) for receiving and releasably receiving the second-lowest reinforcing bar fastener; a temporary receiving means (58) for temporarily receiving the reinforcing bar fasteners that have been released and dropped from the lowest fastener receiving means (54) from the left and right at positions where the reinforcing bar fasteners do not reach the reinforcing bar intersections; a magazine lifting means (50) for driving the fastener magazine (52) up and down; A fastener pushing cylinder (51) having a downward piston rod (51b) with a fastener pushing portion (51a) attached to its tip, which is provided so as to be able to move laterally to a position directly above the rebar intersection when the fastener magazine (52) is raised; A reinforcing bar intersection connecting device comprising:

Images