JPH0372142A - Anchoring device for rod-shaped body - Google Patents

Abstract

PURPOSE:To ensure an easy job by providing a wedge body comprising a jointing unit and a cover nut, and having an engagement tooth on the tapered internal surface of the through-hole of the cover nut, and causing the engagement of the wedge body with an inserted rod-shaped body. CONSTITUTION:An anchoring device is constituted with a jointing unit 5, a cover nut 7, a taper surface 8, a wedge body 10, an engagement tooth 11, a spring 12 and steel rods (rod-shaped bodies) 13 and 14. In addition, the steel rods 13 and 14 to be jointed are inserted in the cover nut 7, and the tips of the rods 13 and 14 are made to advance into the cover nut 7 beyond the engagement tooth 11 at the tip of the small bore part of the wedge body 10 against the force of the spring 12. Then, a pressing force acting on the steel rods 13 and 14 is released and the energizing force of the spring 12 is used to return the wedge body 10 to the small bore side of the taper surface 8, thereby causing the coupling of the external surfaces of the rods 13 and 14 with the engagement tooth 11 of the wedge body 10. According to the aforesaid construction, a job can be quickly done.

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a fixing device for fixing rod-shaped bodies such as reinforcing bars and tie rods to other rod-shaped bodies or structures, and in particular, to The present invention relates to a rod-shaped fixing device that can perform fixing work.

``Prior art'' There are two methods of butt-joining rod-shaped bodies such as reinforcing bars at construction and civil engineering sites: mechanically joining them using a joining tool called a coupler, and joining the rod-shaped bodies together at the joints (so-called joints). It is roughly divided into two types: metallurgical means that press them together.

``Problems to be Solved by the Invention'' However, all of the above-mentioned conventional means for joining rod-shaped bodies have the following problems, and solutions to these problems have been awaited.

In other words, in the mechanical joining means using couplers,
The coupler and the rod can be connected by carving a female thread into the end of the coupler and screwing a threaded reinforcing bar into it, or by inserting the end of the rod into a cylindrical coupler and caulking it. However, this fixing work required a special jig, and the fixing work on site was not easy.

On the other hand, even with metallurgical joining methods using pressure welding, it is not easy to fix on-site, and it is also difficult to ensure welding accuracy to make the compressive and tensile strengths of each joint uniform. I have an assignment.

This invention was made in view of the above circumstances, and it is possible to easily and quickly fix a rod-shaped object such as a reinforcing bar to another rod-shaped object or a structure, and also to provide a rod-shaped object that can secure sufficient strength of the anchoring part. The purpose is to provide an anchoring device for the body.

``Means for Solving the Problems'' Therefore, the present invention provides a joining unit having a protrusion protruding from a gripping part and having a male thread carved on its outer peripheral surface, and a cover nut having a through hole extending in the axial direction. A female thread is formed at one end of the through hole of the cover nut so that the cover nut is screwed into the protrusion of the joining unit, and an opening at the other end of the cover nut is formed at the other end of the through hole of the cover nut. A tapered surface is formed that widens inward from the cover nut, and a wedge body divided in the circumferential direction is formed on this tapered surface so that it can be freely moved in the axial direction and circumferential direction of the cover nut along this tapered surface. A plurality of wedge bodies are arranged, and engagement teeth shaped to engage with the outer circumferential surface of the rod-shaped body are formed on the inner circumferential surface of these wedge bodies, and an urging force that urges these wedge bodies toward the small diameter portion side of the tapered surface. The above-mentioned problem is attempted to be solved by configuring a rod-shaped fixing device that is provided with means.

Here, it is preferable that a positioning recess in which the tip of the rod-shaped body is accommodated is formed at the tip of the protrusion of the joining unit. Further, it is preferable that a wedge pressing portion protruding toward the large diameter portion of the wedge is provided at the outer peripheral end of the positioning recess. Further, a guide pawl extending in the axial direction of the cover nut is disposed on the tapered surface so as to be movable in the circumferential direction of the cover nut, and the side surface of the wedge body is always in contact with the guide pawl. It is preferable to form the shape so that they touch each other. It is also preferable that a stopper is provided at the other end opening of the cover nut to prevent the wedge from protruding outward from the cover nut.

"Operation" In this invention, when the rod-shaped body to be joined is inserted into the cover nut of the fixing device from the other end opening, the tip of the rod-shaped body engages with the retaining teeth at the tip of the small diameter portion of the wedge. Then, by pushing the rod-shaped body into the cover nut, the wedge body moves toward the large diameter portion of the tapered surface against the biasing force of the biasing means. As a result, the diameter of the inner circumferential surface of the wedge body becomes slightly larger than the diameter of the rod-shaped body, and the rod-shaped body passes over the engagement teeth of the wedge body and enters into the cover nut.

After pushing the rod-like body into the cover nut, when the pressing force on the rod-like body is released, each wedge body is pushed back to the small diameter side of the tapered surface by the biasing force of the biasing means, and the wedge bodies are pressed against the outer circumferential surface of the rod-like body. This rod-shaped body is connected to the fixing device by the engagement teeth of the wedge bodies engaging with each other.

In addition, since the wedge body is rotatable relative to the tapered surface, even if the cover nut or joining unit is rotated after the retaining teeth of the wedge engage with the outer peripheral surface of the rod-shaped body, the wedge body will not rotate. I don't have to take her around.

"Embodiments" Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 4 are diagrams showing a first embodiment in which the rod-shaped body fixing device of the present invention is used for butt joining of steel rods.

In these figures, what is represented by the entire symbol l is a reinforcing bar fixing device (hereinafter simply referred to as "fixing device"),
This fixing device 1 includes a grip portion 2 having a substantially hexagonal column shape, and a male screw portion 3 extending in the front and rear directions of the grip portion 2, and a male screw portion 3 on the outer peripheral surface.
A joining unit 5 includes a substantially cylindrical protrusion 4.4 formed with a cylindrical projection 4.4, and a through hole 6.6 extending in the axial direction.
A female threaded portion 6a16 is provided on the inner peripheral surface of one end of this through hole 6.6.
By forming the protrusion 4.4 of the joining unit 5
The cover nut 7.7 has a substantially hexagonal column shape and is screwed into the cover nut 7.7.

The other end of the through hole 6 of the cover nut 7 is formed with a truncated conical tapered surface 8 that widens inward from the other end opening 7a of the cover nut 7. Also, the tapered surface 8
On the top, an outer circumferential surface is formed along this tapered surface 8 and the entire surface extends in the axial direction of the through hole 6 of the cover nut 7, so that it can be slid in the circumferential direction of the through hole 6 of the cover nut 7. Guide pawls 9.9, .
0.101... are arranged.

This wedge body 10 is formed in the shape of a truncated conical body divided into three parts in the circumferential direction, and has a through hole formed in the axial direction.
0a is formed on a tapered surface along the tapered surface 8, so that it can freely slide in the axial direction of the through hole 6 of the cover nut 7 while being guided by the guide claws 9, 9, . . . ,
The entire wedge body 10, including the guide claws 9, is slidable in the circumferential direction of the through hole 6 of the cover nut 7. Also, cuneiform 10. The inner circumferential surface 10b of ... is formed into a curved surface having a curvature equal to or slightly larger than the outer circumferential surface of the steel rod to be welded.

Specifically, as shown in FIGS. 3 and 4, the guide claws 9.9, . and,
Its side surface is formed along the generatrix of the truncated cone constituting the tapered surface 8, and its inclination is equal to the inclination of the hypotenuse of the isosceles triangle. On the other hand, the wedge body 10.
The side surfaces of the guide claws 9.9, . . . are also formed as inclined surfaces adjacent to the side surfaces of the guide claws 9. ...
are located on the small diameter side of the tapered surface 8, and their inner circumferential surfaces are in contact with each other. The guide claws 9, . . . are arranged in contact with the side surfaces thereof.

Further, the inner circumferential surface 10b of the wedge body 10 has a female screw (retaining tooth) 1.
1 is engraved. The female screw 11 has a thread diameter that is approximately the same as or slightly smaller than the outer diameter of the steel rod to be joined, so that it can bite into the outer circumferential surface of the steel rod. Note that the shape of the threads of the female thread 11 is such that the shape of the ridges on the surface of the tapered surface 8 facing the small diameter portion is designed to facilitate the insertion of the steel rod into the fixing device, which will be described later, and to increase resistance to the tensile force acting on the steel rod. It is preferable to make the slope steeper and to make the slope of the surface of the tapered surface 8 toward the large diameter part gentler. Further, the axial length of the wedge lO is shorter than the axial length of the tapered surface 8.

Further, reference numeral 12 is interposed between the large diameter end faces of the wedge bodies lOl... and the tip faces of the projections 4 of the joining unit 5, and these wedge bodies 10. This spring 12 and the wedge body 10. A ring-shaped washer 15 is interposed between the end surfaces of the large diameter portions. Further, the other end opening 7a of the cover nut 7 includes a tapered inclined portion 7b for facilitating the insertion of reinforcing bars, and the wedge body 10.
A step 7c is continuously formed as a stopper to prevent the... from coming off the cover nut 7.

In this embodiment, a positioning recess 4a having approximately the same diameter or a slightly larger diameter than the steel rod to be welded is formed on the tip end surface of the protrusion 4 of the welding unit 5. This positioning recess 4a is
They are provided at mutually symmetrical positions across the grip part 2 of the joining unit 5, so that when joining the steel bars, the tips of these steel bars are inserted into the positioning recess 4a, thereby preventing misalignment. Steel bars can be joined, and their positioning is easy and reliable.

Further, the outer peripheral end of the positioning recess 4a is connected to the wedge l
The wedge pressing portion 4b protrudes toward O. The distal end surface of the wedge pressing portion 4b is an inclined surface that slopes forward as it goes outward, while the large diameter end face of the wedge 1O is formed into an inclined surface along the end surface of the wedge pressing portion 4b. ing. Thereby, the spring 12 is held between the gap between the side surface of the wedge pressing portion 4b and the through hole 6 of the cover nut 7, thereby preventing the spring 12 from falling off.

Next, with reference to FIGS. 5 to 8, a steel rod connecting operation using the fixing device 1 which is an embodiment of the present invention will be described.

First, as shown in FIG. 5, a pair of steel rods 13 to be joined
．． One of the steel rods 13 of the steel rods 14 is inserted into the fixing device l.

As shown in FIG. 5, when the steel rod 13 is not inserted, each wedge body 10, . The female screw portion of the wedge lOl, which is comprised of the female screws 11, . . . , has a thread diameter approximately equal to or slightly smaller than the outer diameter of the steel rod.

When the steel rod 13 is inserted into the cover nut 7 from the other end opening 7a of one cover nut 7 of the fixing device l in the state shown in FIG. Female thread at the tip of the small diameter part 11. ... and then steel rod 1
3 is pushed into the cover nut 7, the wedge lOl... resists the biasing force of the spring 12, and the guide claw 9
, . . , it slides along the axial direction of the cover nut 7 toward the large-diameter side of the tapered surface 8. As a result, the female thread 11 of the wedge body 10°... The thread diameter of the female threaded portion formed by .

Then, after pushing the steel rod 13 into the cover nut 7 until the tip of the steel rod 13 comes into contact with the bottom surface of the positioning recess 4a of the joining unit 5, when the pressing force on the steel rod 13 is released, the spring 12 is attached. Each wedge 10.・
... is pushed back slightly to the small diameter side of the Taper surface 8, and the steel rod 1
This steel rod 13 is connected to the fixing device 1 by the outer circumferential surface of 3 and the female threads 11 of the wedge bodies 10, . . . engaging with each other.

Here, if a slight gap remains between the tip surface of the steel rod 13 and the tip surface of the protrusion 4, as shown in FIG. , the tip surface of the protrusion 4 is brought into contact with the tip surface of the steel rod 13. At this time, since the distal end surface of the wedge pressing portion 4b of the joining unit 5 is in contact with the end surface on the large diameter side of the wedge lO, the rotation of the gripping portion 2 ensures that the wedge 10 is moved toward the small diameter portion. , and the engagement between the wedge body 10 and the steel rod 13 is ensured. Furthermore, since the tip end surface of the wedge pressing portion 4b is formed into an inclined surface, the wedge 10 is also urged inwardly into the cover nut 7, making the engagement with the steel rod 13 more reliable. Become.

Next, as shown in FIG. 7, the remaining steel rod 14 is similarly inserted into the other cover nut 7, thereby connecting this steel rod 14 to the fixing device l. Here, if a slight gap remains between the tip end surface of the steel rod 14 and the tip end surface of the protrusion 4, when the grip section 2 of the joining unit 5 is rotated as described above, the already connected steel rod Either the tip end surface of the steel rod 13 will be separated from the tip end surface of the protrusion 4, or the tip end surface of the steel rod 13 will be pressed against the tip end surface of the protrusion 4 with unreasonable force. Therefore, as shown in FIG. 8, by rotating the other cover nut 7 in one direction, the tip end surface of the steel rod 14 is brought into contact with the tip surface of the protrusion 4.

The steel rods 13 and 14 can be butted and joined by the above operations. In this embodiment, the steel rods 13.14 to be welded can be joined to each other simply by inserting them into the fixing device l, and the joining operation can be performed quickly and reliably. There is no need for a jig for fixing the coupler, such as a coupler for joining reinforcing bars, and the work of joining the steel bars 13 and 14 can be easily performed even in a narrow work space.

Also, cuneiform 10. ... are rotatable with respect to the tapered surface 8, so that the wedge bodies 10. Female thread 11 of...
Even if the cover nut 7 or the joining unit 5 is rotated after the wedge body 10.
. . . does not rotate together, and the state of engagement between the wedge bodies lOl . . . and steel rods, deformed reinforcing bars, etc. is firmly maintained. Therefore, even if a gap is created between the tip end surface of the steel rod or the like and the tip end surface of the protrusion 4 of the joining unit 5 when connecting the steel rod or the like to the fixing device 1 as described above, the steel rod or the like and the wedge body 10 ．．・
By rotating the grip part 2 or cover nut 7 of the joining unit 5, the tip surfaces of these steel rods 13 and 14 can be brought into contact with the tip surfaces of the protrusions 4 without changing the state of engagement with the steel rods 13 and 14. The rods 13, 14 and the fixing device l can be joined in a completely integrated manner. Moreover, steel rod 1
3.14 can be brought into contact with the tip surface of the protrusion 4 without rotating it, so it can be used when the steel rod is fixed to an already constructed part at a construction site, etc., or when a steel bar is attached to a steel cage. Even in cases where the steel bars are pre-assembled as in the above example, these steel bars can be joined.

Next, Figures 9 to 11! ff is a diagram showing a second embodiment in which the rod-shaped body fixing device of the present invention is used for joining deformed reinforcing bars. In the following description, the same components as those in the embodiment described above will be denoted by the same reference numerals, and the description thereof will be omitted.

In this embodiment, as shown in FIG. 10, guide claws 9, .
The wedge body 10. is formed integrally with the wedge body 10. . . . are guided by the guide claws 9, . Therefore, the wedge body 10...the tapered surface 8 as a whole
It is said that it can rotate freely in the circumferential direction. Therefore, the spring 12 and the guide pawl 9.9 are made of a flexible material such as plastic, and the spring 12 is formed into a bellows shape. Note that reference numeral 19 is a spiral spring wound around the outer periphery of the spring 12, and is required only when the urging force is insufficient with only the resin spring 12.

Further, in this embodiment, the wedge bodies 101 are divided into four parts, and accordingly, four guide claws 9 are also provided along the circumferential direction of the tapered surface 8. That is, since a normal deformed reinforcing bar 16 is provided with nodes 17 extending in the axial direction and nodes 18 extending in the circumferential direction, the wedge body 10 shown in FIG. ... Axial node 1 of deformed reinforcing bar 16 in the groove between
7 facilitates insertion and fixation of the deformed reinforcing bars 16.

The work of joining deformed reinforcing bars according to this embodiment is almost the same as that of the previous embodiment, and the effect obtained is also almost the same as that of the previous embodiment.

"Other Embodiments of the Invention" The details of the rod-shaped body fixing device of the present invention are not limited to the embodiments described above, and various modifications are possible. Below, the first
Other embodiments of the present invention will be described with reference to FIGS. 2 to 14.

FIG. 12 shows a rod-shaped body fixing device l of the present invention mounted on an iron plate 30.
It is a figure which shows the example used for fixing the steel rod 13 to. In this way, the fixing bag [1 can also be used for the purpose of fixing one steel rod 13 to a structure such as the iron plate 30, and in this case,
A cylindrical body 32 having a female threaded part 31 that is screwed into the male threaded part 3 is attached to one side of the joining unit 5, and this can be fixed to the iron plate 30 by welding or the like.

Further, FIG. 13 is a diagram showing an example in which the rod-shaped body fixing device 1 of the present invention is used for joining a steel rod 13 and a threaded horseshoe reinforcing bar 33. In this case as well, the cylindrical body 32 may be attached to one side of the joining unit 5.
It is necessary to carve a female threaded portion 34 that matches the pitch and effective diameter of the threaded horseshoe reinforcing bar 33 at the location where the threaded horseshoe reinforcing bar 33 is fixed.

Furthermore, FIG. 14 is a diagram showing an example of joining the steel bars 13 by sandwiching the columns, and a fixing device l is provided on each of the iron plates 30 of opposing columns (only one iron plate is shown in the figure). , and these joining devices 1 are connected to each other using threaded reinforcing bars 33 and cylindrical body 32 as in the example shown in FIG. In this case, in order to fix the fixing device 1 to the iron plate 30, a nut 35 is screwed onto the joining unit 5 and the iron plate 30 is fixed.
It is sufficient to fix it to one side of 0.

In the above embodiments, only the joining of steel rods and reinforcing bars has been described, but the rod-shaped body fixing device of the present invention can be suitably applied to rod-shaped bodies in general such as tie rods. Also, cuneiform lO
The shape of the engaging teeth formed on the inner circumferential surfaces 10b, .

"Effect of the invention" As described in detail above, according to the present invention.

These rod-shaped bodies can be joined together simply by inserting the rod-shaped bodies to be joined into the fixing device, and the joining work can be done quickly and reliably. Also, rod-shaped bodies can be easily joined even in a narrow work space.

In addition, since the wedge body is rotatable relative to the Taber surface, even if the cover nut or joining unit is rotated after the engaging teeth of the wedge engage with the record or the outer peripheral surface of the rod-shaped body, the wedge body The wedge body and the rod-shaped body are not rotated together, and the state of engagement between the wedge body and the rod-shaped body is firmly maintained.

Therefore, even if a gap occurs between the tip end surface of the rod-shaped body and the tip surface of the protrusion of the joining unit when connecting the rod-shaped body to the fixing device, the rod-like body can be fixed by rotating the gripping part of the joining unit or the cover nut. The distal end surface of the body can be brought into contact with the distal end surface of the protrusion, and the rod-shaped body and the fixing device can be joined in a completely integrated state. Moreover, since the tip end surface of the bar can be brought into contact with the tip end surface of the protrusion without rotating the rod-shaped body, it can be used, for example, when reinforcing bars are fixed to an already constructed part at a construction site, etc. Even if the reinforcing bars are pre-assembled, these reinforcing bars can be joined.

[Brief explanation of drawings]

1 to 4 are views showing a rod-shaped body fixing device according to a first embodiment of the present invention, in which FIG. 1 is a sectional view, FIG. 2 is a front view, and FIG. 3 is the same as that in FIG. 4 is a side view, FIGS. 5 to 8 are diagrams for explaining reinforcing bar joining work by the fixing device of this embodiment, and FIGS. FIG. 11 is a diagram showing a rod-shaped body fixing device according to a second embodiment of the present invention, and FIG. 9 is a sectional view;
FIG. 10 is a perspective view showing the spring and guide pawl taken out, FIG. 11 is a sectional view taken along line BB' in FIG. 9, and FIGS. Fifth
FIG. 2 is a cross-sectional view showing a rod-shaped body fixing device according to an embodiment. 13.14... Steel rod (rod-shaped body).

Claims (5)

[Claims] (1) Consisting of a joining unit that has a protrusion that protrudes from the grip part and has a male thread carved on its outer peripheral surface, and a cover nut that has a through hole that extends in the axial direction, and the cover nut has a through hole that extends in the axial direction. One end of the hole is provided with a female thread so that the cover nut can be screwed into the protrusion of the joining unit, while the other end of the through hole of the cover nut is provided with a female thread extending from the opening of the other end of the cover nut. A tapered surface is formed that widens in the direction, and a wedge body divided in the circumferential direction is formed on this tapered surface so that it can freely move in the axial direction and circumferential direction of the cover nut along this tapered surface. A plurality of wedge bodies are disposed on the inner circumferential surface of the rod-shaped body, and engaging teeth shaped to engage with the outer circumferential surface of the rod-shaped body are formed on the inner circumferential surface of the wedge bodies. A bar-shaped fixing device that is provided with a biasing means for biasing the body. (2) The fixing device for a rod-shaped body according to claim 1, wherein a positioning recess in which the tip of the rod-shaped body is accommodated is formed at the tip of the protrusion of the joining unit. Device. (3) The fixing device for a rod-shaped body according to claim 2, wherein a wedge pressing portion that protrudes toward a large diameter portion of the wedge is provided at an outer peripheral end of the positioning recess. A rod-shaped body fixing device. (4) In the rod-shaped body fixing device according to claim 1, claim 2, or claim 3, a guide claw extending in the axial direction of the cover nut is provided on the tapered surface in the circumferential direction of the cover nut. 1. A rod-shaped fixing device, characterized in that the wedge body is movably disposed in the rod-shaped body, and the side surface of the wedge body is formed in a shape such that it always comes into contact with the guide pawl. (5) In the rod-shaped body fixing device according to claim 1, claim 2, claim 3, or claim 4, the other end opening of the cover nut prevents the wedge from protruding outward from the cover nut. A fixing device for a rod-shaped body, characterized in that it is provided with a stopper.