JP2020066905A - Connector for bar materials - Google Patents

Abstract

To provide a connector for bar materials capable of connecting a first bar material made of a reinforcing bar and a second bar material having a male screw part at an end to each other regardless of a relative angle between the first bar material and the second bar material.SOLUTION: A connector for bar materials has a first retainer 21 which retains a first bar material 11 made of a reinforcing bar and a second retainer 22 which retains a second bar material 12 having a male screw part at least at an end. The second retainer 22 is coupled to the first retainer 21 rotatably on an axis along a direction orthogonal to the first bar material 11 retained by the first retainer 21.SELECTED DRAWING: Figure 2

Description

  TECHNICAL FIELD The present invention relates to a connecting member for a bar member used for connecting a separator supporting a form plate to a reinforcing bar arranged in a concrete form, for example.

  The following Patent Document 1 discloses a connecting metal article for connecting a reinforcing bar arranged in a concrete formwork and a separator supporting a formwork plate. This connecting hardware has a U-shaped hardware body having a pair of arm portions and a holding portion that connects both arm portions, a bolt member that is fastened to the pair of arm portions, and a screw hole into which the separator is screwed. And a nut fixed to the metal body.

  To connect the reinforcing bar and the separator using this connecting hardware, fasten the bolt members to the pair of arm parts with the reinforcing bar fitted inside the holding part, and bring the pair of arm parts close to each other. The holding bar and the pair of arms hold the reinforcing bar. Then, the reinforcing bar and the separator are connected by screwing the separator to the nut fixed to the metal body.

JP, 2003-120029, A

  When the connecting hardware described in Patent Document 1 is used, the reinforcing bars sandwiched by the hardware main body and the separator screwed with the nut are connected in an orthogonal relationship. However, the reinforcing bar and the separator are not necessarily in a mutually orthogonal relationship, and when the mold is inclined, the separator and the reinforcing bar may be relatively inclined. In such a case, the reinforcing bar and the separator cannot be connected using the connecting metal piece described in Patent Document 1. Further, there are cases where it is desired to connect the reinforcing bars arranged in a state of intersecting with each other, but the connecting metal piece described in Patent Document 1 cannot be applied to such connection.

  It is an object of the present invention to provide a rod connecting tool that can connect two rods including a reinforcing bar regardless of their relative angles.

(1) The connecting member of the bar material of the present invention is
A first holding tool for holding a first bar made of rebar, and a second holding tool for holding a second bar having an externally threaded portion at its end,
The second holder is connected to the first holder so as to be rotatable about an axis along a direction orthogonal to the first rod member held by the first holder.

  According to the connecting tool having the above configuration, the second holding tool that holds the second rod is provided with respect to the first holding tool that holds the first rod. The first rod and the second rod can be connected to each other regardless of the relative angle between the first rod and the second rod by rotating about the axis along the direction orthogonal to the rod.

(2) Preferably, the first holder is a first holder main body having a pair of holding plates arranged to face each other, and a connection plate connecting one end portions of the pair of holding portions. A fastening bolt that penetrates through the pair of holding plates, and a fastening nut that brings the pair of holding plates closer to each other by fastening the fastening bolt to the fastening bolt, and the fastening bolt and the fastening nut. The first bar is clamped by a pair of clamping plates by fastening.
According to this configuration, the first rod can be held by the pair of holding plates by fastening the fastening bolt and the fastening nut.

(3) Preferably, the second holder is a first nut screwed to the fastening bolt and a second holder connected to the first nut and holding the second rod. And a body.
According to this configuration, by screwing the first nut onto the fastening bolt, the first nut is rotated about the axis of the fastening bolt, and the second nut held by the second holder main body is rotated. The rod and the first rod held by the first holder body can be arranged at an arbitrary angle.

(4) Preferably, the fastening nut also serves as the first nut.
With such a configuration, the number of parts can be reduced.

(5) Preferably, the second nut main body has a shaft center along a direction orthogonal to the shaft center of the first nut, and the second rod member is screwed into the second nut. Consists of.
According to this configuration, the second rod can be held by the second nut by screwing the second rod into the second nut.

(6) Preferably, the pair of holding plates relatively move in the lengthwise direction of the first rod by engaging with each other when the fastening bolts and the fastening nuts come close to each other by being fastened. It has an engaging structure for blocking.
With such a configuration, even if a force that displaces the pair of holding plates in the longitudinal direction of the first rod is applied, the relative movement of the pair of holding plates is prevented, and the first rod is held. You can maintain your strength.

(7) Preferably, ribs extending along the length direction are formed at two locations on the outer peripheral surface of the first rod, the ribs extending 180 ° out of phase with each other in the outer peripheral direction of the first rod. ,
Recesses into which the ribs are fitted are formed in the holding plates so as to face each other.
With such a configuration, the rib formed on the first rod can be fitted into the recesses of the pair of sandwiching plates.

(8) Preferably, a rib extending along the length direction is formed on the outer peripheral surface of the first rod member,
On the inner surface of the first holding tool, three or more recesses are formed along the outer peripheral direction of the first bar member held by the first holding tool, into which the ribs are fitted.
With such a configuration, the rib formed on the first rod can be fitted into any of the plurality of recesses formed on the first holder, and the rib in the outer peripheral direction of the first rod can be fitted. The degree of freedom of orientation can be increased.

(9) Preferably, each of the pair of holding plates has a mounting hole through which the fastening bolt passes.
The diameters of the mounting holes formed in the holding plates are different from each other.
With such a configuration, the fastening bolt can be tilted obliquely in a state where the fastening bolt penetrates through the mounting holes formed in the pair of sandwiching plates, and the first rod member disposed between the pair of sandwiching plates can be provided. The gap with the fastening bolt can be expanded. Therefore, the first holder can be easily moved in the length direction of the first rod, and the first holder can be easily positioned at an appropriate position in the length direction of the first rod. You can

(10) Preferably, the first holder includes a plurality of first holder bodies,
One of the fastening bolts is attached by penetrating the holding plates of the plurality of first holder bodies.
With such a configuration, it is possible to connect the plurality of first rods to each other using the connecting tool. Further, since a plurality of holder main bodies can be connected with one fastening bolt, the structure of the connecting tool can be simplified.

(11) A bar connecting tool according to the present disclosure includes a first holding tool having a plurality of first holding tool main bodies for holding a first bar made of a reinforcing bar,
The plurality of first holder main bodies are connected to each other so as to be rotatable about an axis along a direction orthogonal to the first rod member held by each first holder main body.

  According to the connecting tool having the above configuration, the first holding tool holding the other first bar with respect to the first holding tool body holding the one first bar By rotating the main body about the axis along the direction orthogonal to each first rod, one first rod and the other first rod are irrespective of their relative angles. Can be connected.

  According to the connector of the present invention, it is possible to connect the first rod member made of the reinforcing bar and the second rod member having the male screw portion at the end regardless of the relative angle between them.

It is a side view which shows the concrete formwork using the connection tool which concerns on one Embodiment of this invention. It is a side view of a connection tool. It is a front view of a connection tool. FIG. 4 is a sectional view taken along the line IV-IV of FIG. It is a perspective view of a 1st holding fixture. It is a side view showing the case where two rebars are connected using a connecting tool. It is a front view showing a case where two reinforcing bars are connected using a connecting tool. It is a front view showing a case where three reinforcing bars are connected using a connecting tool. It is a side view of the coupling tool concerning other embodiments of the present invention. It is a front view of a connection tool.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing a concrete formwork using a connector according to an embodiment of the present invention.
The connecting tool 20 of the present embodiment connects the reinforcing bars (first rods) 11 arranged in the concrete formwork 10 and the separators (second rods) 12 supporting the form plate 13 to each other. Used for. The connecting tool 20 is also used to connect the plurality of reinforcing bars (first bar members) 11 to each other. In the present embodiment, the form frame plates 13a supported by a plurality of square members 13b, steel pipes 13c, and the like are arranged so as to be inclined, and the separator 12 projects in a direction orthogonal to the form frame plates 13a. Further, the reinforcing bar 11 includes main reinforcing bars 11 a and 11 b whose one end is connected to the separator 12 and anchor reinforcing bars 11 c which are connected to the other ends of the main reinforcing bars 11 a and 11 b and are embedded in the leveling concrete 14.

2 is a side view of the connector, and FIG. 3 is a front view of the connector.
The connector 20 has a first holder 21 that holds the reinforcing bar 11 and a second holder 22 that holds the separator 12.
On the outer peripheral surface of the reinforcing bar 11, ribs 15 extending along the length direction and nodes 16 extending along the circumferential direction are formed. The ribs 15 are provided at two positions which are 180 ° out of phase with each other in the outer peripheral direction of the reinforcing bar 11. A large number of nodes 16 are provided at a predetermined pitch in the length direction of the reinforcing bar 11. Further, the joints 16 arranged on one side of the outer peripheral surface of the reinforcing bar 11 and the joints 16 arranged on the other side of the reinforcing bar 11 are provided with a half pitch position offset in the longitudinal direction of the reinforcing bar 11. The separator 12 has a male screw formed over the entire length thereof. However, the separator 12 may be formed with a male screw only at least at the end connected to the reinforcing bar 11.

The first holding tool 21 includes a first holding tool body 24, a fastening bolt 25, and a fastening nut 31.
The first holder main body 24 is formed by bending a metal plate material such as a steel plate. The first holder main body 24 has a pair of holding plates 27 and a connecting plate 28 that connects one end portions of the pair of holding plates 27. The first holder main body 24 has a substantially U-shape when viewed from the front without holding the reinforcing bar 11. The pair of holding plates 27 are formed in a substantially rectangular shape. The connection plate 28 is formed to be curved in a semi-circular shape when viewed from the front. The reinforcing bar 11 is arranged inside the pair of holding plates 27 and the connecting plate 28.

  The pair of sandwiching plates 27 are arranged with a space slightly wider than the outer diameter of the reinforcing bar 11 (the outer diameter including the ribs 15 and the nodes 16). Each holding plate 27 has mounting holes 27a and 27b through which the fastening bolts 25 are inserted. The fastening bolt 25 is inserted through the attachment holes 27a and 27b, and is thus attached through the pair of holding plates 27.

  As shown in FIG. 3A, the one mounting hole 27b has a larger diameter than the other mounting hole 27a. Further, the two mounting holes 27a and 27b have the same position on the connecting plate 28 side, and one mounting hole 27b is farther from the connecting plate 28 than the other mounting hole 27a on the non-connecting plate 28 side. Therefore, the fastening bolt 25 inserted through both the mounting holes 27a and 27b can be tilted in the arrow a direction. This makes it possible to widen the gap t between the reinforcing bar 11 arranged inside the first holding tool 21 and the fastening bolt 25 as much as possible, and move the first holding tool 21 in the longitudinal direction of the reinforcing bar 11. It can be made easier. Therefore, it is possible to easily position the first holder main body 24 at an appropriate position in the longitudinal direction of the reinforcing bar 11.

  The fastening bolt 25 is a bolt with a hexagonal head. As shown in FIG. 3 (b), the fastening bolt 25 tightens the fastening nut 31 to the tip of the male screw portion 25 a in a state of penetrating the pair of holding plates 27, so that the distance between the pair of holding plates 27 is increased. The reinforcing bars 11 can be clamped by the pair of clamping plates 27. In addition, in the following description, as shown in FIG. 2, the length direction of the reinforcing bar 11 held by the first holding tool 21 is also referred to as “first direction A”. Further, as will be described later, the length direction of the separator 12 held by the second holding tool 22 is also referred to as “second direction B”.

FIG. 4 is a sectional view taken along the line IV-IV of FIG.
As shown in FIGS. 3 and 4, a plurality of protrusions 29 are formed on the inner surfaces of the pair of holding plates 27 and the connection plate 28. The protrusions 29 are arranged side by side in the vertical and horizontal directions at intervals in the first direction A and the outer peripheral direction of the reinforcing bar 11. When the fastening bolt 25 and the fastening nut 31 are fastened, each protrusion 29 engages with the node 16 of the reinforcing bar 11 to prevent the first holder body 24 from moving in the longitudinal direction of the reinforcing bar 11. can do.

  Between the projections 29 arranged in the outer peripheral direction of the reinforcing bar 11, the ribs 15 of the reinforcing bar 11 function as recesses 30. The recess 30 is arranged at a position where the ribs 15 of the reinforcing bar 11 are fitted to each other when the two ribs 15 of the reinforcing bar 11 are arranged toward the pair of holding plates 27. Further, the recess 30 is also arranged at a position where the rib 15 of the reinforcing bar 11 is fitted when the rib 15 of the reinforcing bar 11 is oriented in a direction inclined or orthogonal to a direction in which the pair of holding plates 27 face each other. There is.

  By fitting the rib 15 in the recess 30 in this manner, it is possible to prevent the reinforcing bar 11 from turning in the outer peripheral direction. Further, since the recesses 30 are formed at a plurality of locations in the outer peripheral direction of the reinforcing bar 11, no matter which direction the ribs 15 are oriented in the outer peripheral direction of the reinforcing bar 11, the recesses 30 fit into any of the recesses 30. This makes it easier to increase the degree of freedom of the position of the rib 15 in the outer peripheral direction of the reinforcing bar 11.

FIG. 5 is a perspective view of the first holder.
An engaging protrusion 27c is provided on the other end of the holding plate 27 on the side opposite to the connecting plate 28, and an engaging protrusion 27c is provided on the other end of the other holding plate 27 on the side opposite to the connecting plate 28. A recess 27d is provided. The engaging convex portion 27c and the engaging concave portion 27d are configured to engage with each other when the fastening bolt 25 is fastened to the fastening nut 31 and the other ends of the pair of holding plates 27 are brought close to each other. There is. In other words, the pair of holding plates 27 have an engagement structure that prevents relative movement in the length direction of the reinforcing bar 11 by engaging with each other when they are brought close to each other by the fastening bolt 25 and the fastening nut 31. There is. As a result, when a force that separates the reinforcing bar 11 held by the first holding tool 21 from the separator 12 held by the second holding tool 22 as described later is applied, the pair of sandwiching plates 27 It is possible to prevent the holding forces of the reinforcing bars 11 from weakening due to the mutual displacement of the two.

  In the connection plate 28 of the first holder main body 24, notches 28a are formed at both ends in the first direction A. When the fastening bolt 25 and the fastening nut 31 are fastened by the notch 28a, the connecting plate 28 is easily deformed, and the distance between the pair of holding plates 27 can be easily narrowed.

The second holding tool 22 has a first nut 31 and a second nut 32.
The first nut 31 is a nut screwed into the fastening bolt 25. In the present embodiment, the fastening nut 31 forming the first holder 21 is also used as the first nut 31.
The second nut 32 constitutes a second holder body that holds the separator 12 by being screwed into the separator 12. The second nut 32 is joined to the outer peripheral surface of the first nut 31 by welding or the like. The axis of the second nut 32 (the central axis of the internal thread) is arranged along a direction orthogonal to the axis of the first nut 31 (the center of the internal thread). In the present embodiment, the axis of the second nut 32 is orthogonal to the axis of the first nut 31.

  The second holding tool 22 is rotatably attached to the fastening bolt 25 with the shaft center of the fastening bolt 25 as a fulcrum. Therefore, the length direction (second direction) B of the separator 12 fastened to the second nut 32 and the length direction (first direction) A of the reinforcing bar 11 held by the first holder 21 are defined as follows. It can be set to any angle. Therefore, as shown in FIG. 1, even when the separator 12 attached to the form plate 13 and the reinforcing bar 11 are in a slanting relationship with each other, the connecting tool 20 can be used to suitably connect both. it can. Further, even when the separator 12 and the reinforcing bar 11 are in the relationship of being orthogonal to each other or in the case of being in the relationship of being parallel to each other, the connecting tool 20 can be preferably used to connect the both.

FIG. 6 is a side view showing a case where two reinforcing bars are connected using a connecting tool, and FIG. 7 is a front view of the same. FIG. 8 is a front view showing a case where three reinforcing bars are connected using a connecting tool.
When connecting a plurality of reinforcing bars 11 using the connecting tool 20, the same number of the first holding tool main bodies 24 as the number of the reinforcing bars 11 are prepared. Then, the reinforcing bars 11 are arranged inside each of the first holding tool bodies 24, and one fastening bolt 25 is inserted into the mounting holes 27a and 27b of each of the first holding tool bodies 24. That is, one fastening bolt 25 is passed through the plurality of first holder main bodies 24. Then, by fastening the fastening nuts 31 to the fastening bolts 25, the pair of holding plates 27 in each of the first holder main bodies 24 are brought close to each other, and the holding plates 27 hold the respective reinforcing bars 11. Thereby, a plurality of reinforcing bars 11 can be connected at an arbitrary relative angle.

  As shown in FIG. 7A, in each of the first holder main bodies 24, one of the mounting holes 27a and 27b formed in the pair of holding plates 27 has a larger diameter than the other. Therefore, when the two first holder main bodies 24 are opposite to each other and are adjacent to each other, the fastening bolt 25 can be inclined with respect to the holding plate 27. Therefore, it is possible to widen the gap t between the reinforcing bar 11 arranged inside the first holder body 24 and the fastening bolt 25, and to easily move the first holder 21 in the longitudinal direction of the reinforcing bar 11. You can Therefore, the first holding tool 21 can be easily positioned at an appropriate position in the longitudinal direction of the reinforcing bar 11.

  In addition, in the example shown in FIGS. 6 to 8, the first nut 31 of the second holder 22 is fastened to the fastening bolt 25 as a fastening nut, but the separator 12 is connected to the plurality of reinforcing bars 11. If not, for example, as shown in part C of FIG. 1, when only a plurality of reinforcing bars 11a, 11b, 11c are connected to each other, a general nut may be fastened as the fastening nut 31. In this case, the connector 20 of this embodiment has the following configuration.

That is, the connector 20 includes the first holder 21 having a plurality of first holder bodies 24 for holding the first bar 11 made of reinforcing steel, and the plurality of first holder bodies 24. Are connected to each other so as to be rotatable about an axis along a direction orthogonal to the first rod 11 held by each first holder body 24.
In addition, the first holding tool 21 has a fastening bolt 25 penetrating and attached to the plurality of first holding tool bodies 24, and a fastening nut 31 that is fastened to the fastening bolt 25. The holder main body 24 is rotatably connected around the axis of the fastening bolt 25.

FIG. 9: is a side view which shows the coupling tool which concerns on other embodiment of this invention, and FIG. 10 is the same front view.
The connector 20 of the present embodiment is different from the above embodiment in the configuration of the second holder 22. The connector 20 of the present embodiment includes a first nut 31 and a second nut 32, and a connecting member 33 that connects the nuts 31 and 32. The connecting member 33 includes a first plate portion 33a and a second plate portion 33b, and both plate portions 33a and 33b are formed by bending one plate member at a right angle (L-shape). Then, the first nut 31 is fixed to the first plate portion 33a, the second nut 32 is fixed to the second plate portion 33b, and the first nut 31 and the second nut 32 are The axes are orthogonal to each other.

  Therefore, also in the present embodiment, the separator 12 is screwed into the second nut 32 of the second holder 22, and the first nut 31 is fastened to the fastening bolt 25, so that the reinforcing bar 11 and the separator 12 are separated from each other. The separators 12 can be connected to each other, and the separator 12 can be arranged at an arbitrary angle with respect to the reinforcing bar 11.

The present invention is not limited to the above embodiment, but can be appropriately modified within the scope of the invention described in the claims.
For example, in the above-described embodiment, the fastening nut 31 that forms the first holding tool 21 and the first nut 31 that forms the second holding tool 22 are used in common, but both should be configured separately. You can That is, a general nut may be used as the fastening nut, and the nut and the first nut 31 of the second holder 22 may be screwed together with the fastening bolt 25. Further, in this case, the fastening nut 31 may be fixed to the one holding plate 27 by welding or the like. Alternatively, the holding plate 27 may be used as a fastening nut by forming a female screw in the mounting hole 27a of the one holding plate 27.

  In addition, the connector of the present invention can be applied to the connection of bar members other than the reinforcing bar used in the concrete formwork and the separator.

11: Reinforcing bar (first bar)
12: Separator (second bar)
15: rib 20: connecting tool 21: first holding tool 22: second holding tool 24: first holding tool body 25: fastening bolt 27: clamping plate 27a: mounting hole 27b: mounting hole 27c: engaging convex Part 27d: Engagement recess 28: Connection plate 30: Recess 31: Fastening nut (first nut)
32: Second nut (second holder main body)

Claims (11)

A first holding tool for holding a first bar made of rebar, and a second holding tool for holding a second bar having an externally threaded portion at its end,
The second holder is coupled to the first holder so as to be rotatable about an axis along a direction orthogonal to the first rod held by the first holder. A connector for bars.   The first holder has a pair of sandwiching plates arranged to face each other, and a first retainer body having a connecting plate connecting one end portions of the pair of sandwiching parts, and the pair of sandwiching plates. And a fastening nut that makes the pair of holding plates approach each other by fastening the fastening bolt to the fastening bolt. The fastening bolt is fastened to the fastening nut to fasten the first bolt. The rod connecting device according to claim 1, wherein the rod is held by a pair of holding plates.   The second holder includes a first nut screwed to the fastening bolt, and a second holder body connected to the first nut and holding the second rod. The rod connector according to claim 2, wherein   The coupling member for a rod member according to claim 3, wherein the fastening nut and the first nut are also used.   4. The second holder body comprises a second nut having an axis along a direction orthogonal to the axis of the first nut and with which the second rod is screwed. Alternatively, the connecting member for the rod according to item 4.   An engagement structure in which the pair of sandwiching plates prevent relative movement in the length direction of the first rod by engaging with each other when they come close to each other by fastening the fastening bolt and the fastening nut. The rod connector according to any one of claims 2 to 5, further comprising: Ribs extending along the length direction are formed at two locations on the outer peripheral surface of the first bar with a 180 ° phase shift in the outer peripheral direction of the first bar.
7. The bar connecting device according to claim 2, wherein recesses into which the ribs are fitted are formed in the holding plates so as to face each other. Ribs extending along the length direction are formed on the outer peripheral surface of the first rod member,
In the inner surface of the first holder, recesses for fitting the ribs are formed at three or more locations along the outer peripheral direction of the first rod member held by the first holder. Item 8. A connecting member for a bar member according to any one of Items 2 to 7. Each of the pair of holding plates has a mounting hole through which the fastening bolt passes,
The rod member connector according to any one of claims 2 to 8, wherein the attachment holes formed in the holding plates have different diameters. The first holder comprises a plurality of first holder bodies,
The rod connector according to any one of claims 2 to 9, wherein one of the fastening bolts is attached by penetrating the holding plates of the plurality of first holder bodies. A first retainer having a plurality of first retainer main bodies for retaining the first bar made of rebar,
A plurality of first holder main bodies are connected to each other rotatably about an axis along a direction orthogonal to the first rods held by the respective first holder main bodies; Connector.

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