JPH09324495A - Joint element and jointing method using the element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily connect rods as jointing objects to each other, and prevent the occurrence of an axial play at the connected part of the rods. SOLUTION: A pair of connectors 1 and 14 are formed to have insertion holes 5a and 19a made of tapered surfaces 5 and 19, engagement teeth 7 and 21 peripherally separated and slidably arranged within the insertion holes 5a and 19a, and energization members 12 and 26 for energizing the engagement teeth 7 and 21 toward the small diameter sides of the tapered surfaces 5 and 19. Also, one of the connectors 1 and 14 is internally provided with a stopper 28. On the other hand, an external thread 3 is engraved on the external surface of one connector 1, and an internal thread 17 for screwing the external thread 3 is engraved on the other connector 14. Then, jointing objects are inserted in each of the engagement teeth 9 and 21, with the threads 3 and 17 engaged with each other with a tolerance and, thereafter, one of the connectors 1 and 14 is rotated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting tool for connecting bar members (hereinafter referred to as connected bars) such as deformed bars and spiral bars, and a connecting method using the connecting tool.

[0002]

2. Description of the Related Art The applicant has previously proposed, as a connecting tool for steel rods,
A segment having a tapered surface on the outer periphery and engaging teeth on the inner periphery is slidable in the axial direction in the case, and a plurality of connecting bodies that are stored by being divided into a plurality of portions in the circumferential direction are connected to each other. By inserting a steel rod to be connected between the segments of the connecting body, the engaging teeth of the segment urged in the locking direction are locked to the steel rod to prevent the steel rod from coming off. Proposed (Japanese Utility Model Laid-Open No. 2-107632).

[0003]

However, in the above-mentioned conventional structure, since both connecting bodies are fixedly connected to each other and the connecting rod is inserted into each segment, the connecting body is inserted after the insertion. There was a possibility that some play would occur in the axial direction between the rod and the rod to be connected.

That is, as shown in FIG. 9, for example, when the deformed bar 100 is fully inserted up to the back wall 101, the rib 102 and the segment 10 of the deformed bar 100 are deformed.
When a gap D is generated between the tooth surface 104 of No. 3 and the deformed rebar 100 fixed to a member of one building or the like and a connector 105 fixed to the other member, rattling is generated by the above-mentioned gap D,
When joining concrete members, there was a risk of cracking in the concrete.

Therefore, it is an object of the present invention to provide a connecting tool and a connecting method using the connecting tool that solve the above problems.

[0006]

In order to solve the above-mentioned problems, a first aspect of the present invention is directed to a tapered surface (5) (19) which opens an insertion port (4) (18) at one end and expands toward the back. (2) formed with insertion holes (5a) (19a)
(15) and the tapered surface (5) (1) divided in the insertion hole (5a) (19a) in the circumferential direction thereof.
Locking claws (7) arranged so as to be slidable in the axial direction along 9)
(21), locking teeth (9) (23) engraved on the inner peripheral surface of the locking claws (7) (21), and the locking claws (7) (21)
(1) (14) consisting of urging members (12) (26) for pressing the taper surfaces (5) (19) toward the smaller diameter side.
And a stopper portion (28) for the rod to be inserted which is to be inserted into either one of the connecting bodies, and the insertion opening (4) in the case (2) of the one connecting body (1) is provided. A male screw (3) is engraved on the outer peripheral surface on the opposite side, and the insertion port (1) in the case (15) of the other connecting body (14) is formed.
8) The female screw (1) with which the male screw (3) is screwed on the opposite side
7) A connection tool characterized by being engraved with

A second aspect of the present invention is a method for connecting a rod to be connected using the connecting tool according to the first aspect of the present invention, which has an insertion port (4) at one end.
Tapered surface (5) that opens (18) and expands inward
Cases (2) and (15) having insertion holes (5a) and (19a) formed of (19), and the insertion holes (5a) and (19).
a) locking pawls (7) and (21) which are divided in the circumferential direction in a) and are slidable in the axial direction along the tapered surfaces (5) and (19), and the locking pawls (7) Energizing for pressing the locking teeth (9) (23) engraved on the inner peripheral surface of (21) and the locking claws (7) (21) toward the small diameter side of the tapered surfaces (5) (19). A pair of connection bodies (1) and (14) including members (12) and (26) are provided, and a stopper portion (28) of the rod to be connected to be inserted is provided in either one of the connection bodies, and one of them is provided. Male screw (3) is engraved on the outer peripheral surface on the opposite side of the insertion port (4) in the case (2) of the connection body (1) of FIG. 1, and the insertion port (18) of the case (15) of the other connection body (14) is formed. ) Is engraved with a female screw (17) to which the male screw (3) is screwed, and the two connecting bodies (1) (1
The screws (3) and (17) of 4) are tightened with a margin without completely tightening each other, and the connected rods (31) (3)
2) the insertion ports (4) (18) of both connectors (1) (14)
The connection method is characterized in that at least one of both connection bodies (1) and (14) is rotated after that.

In the case of connection in the above invention, first, the male screw (3) of the one connecting body (1) is screwed into the female screw (17) of the other connecting body (14) so that both connecting tools (1) are connected.
Connect (14). At this time, both screws (3) (17)
Is not completely tightened, but is tightly tightened as shown by a gap (D) in FIG.

Next, the insertion port (4) of the one connection tool (1)
Insert one of the connected rods (31) to the stopper (28), and insert the other connecting tool (14) into the insertion opening (18).
From the other side, the other connected rod (32) is inserted until it hits the stopper (28). Then, the locking claws (7) and (21) are pressed by the connected rods (31) and (32) to form the tapered surface (5).
It moves to the inner side which is the large diameter side of (19), and each locking claw (7)
The inner diameter of the locking teeth (9) and (23) formed by (21) is enlarged, and the connected rods (31) and (32) can be inserted all the way.
After this insertion, the locking claws (7) and (21) are pushed back by the biasing load of the biasing members (12) and (26), and the locking teeth (9) and (23) are connected to the connected rod (31). It is locked to the outer peripheral surface of (32) to prevent the connected rods (31) (32) from coming off.

At this time, for example, the connected rods (31) (3)
When 2) is a deformed bar, its ribs (31a) (32)
The connecting rod (31), which is not necessarily located on the side surface of a),
(32) may rattle in the axial direction.

Therefore, after the connecting rods (31) (32) are inserted, at least one of the connecting bodies (1) (14) is rotated in the tightening direction of the screws (3) (17). As a result, the rattling locking teeth (9) (23) move and bite the ribs (31a) (32a), for example, to reliably prevent the rattling.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the embodiments shown in FIGS. Reference numeral 1 denotes one connecting body, which has one cylindrical case 2 having holes with both ends opened. A male screw 3 is engraved on the outer circumference of the end on one side of the case 2 (the side opposite to the side where the connected rod is inserted). An insertion hole 4 for inserting a rod to be connected is axially formed in the other body opposite to the male screw 3. Further, in the case 2, the male screw 3 is inserted from the inner side of the insertion hole 4.
An insertion hole 5a is formed in the axial direction, the insertion hole 5a including a tapered surface 5 having a truncated cone shape that widens toward the side. Furthermore, the hole 5
A chamber 6 composed of a hole having the same diameter as the rear end diameter of the tapered surface 5 is formed in the axial direction from the rear end of the a toward one end, and the outer end thereof is opened.

Reference numeral 7 denotes a first locking claw, the outer peripheral surface of which is formed as a tapered surface 8 along the tapered surface 5, and the inner surface of which has locking teeth 9 in the axial direction in a plane parallel to the axis of the case 2. Has been formed. Further, the locking claws 7 are divided into three in the circumferential direction as shown in FIG. 3, and in a state where these three locking claws 7 are aligned in the circumferential direction, as shown in FIG. The tip (left end in the figure) of the locking claw 7 is located at the minimum diameter end (left end) of the tapered surface 5 and is housed in the insertion hole 5a. Further, the axial length of the locking claw 7 is set so that the inner end (right end) thereof is shorter than the axial length of the tapered surface 5 in the housed state. And each locking claw 7
Is accommodated in such a manner that its tapered surface 9 is slidable on the tapered surface 5 of the case 2, and the locking claws 7 move inward along the tapered surface 5 (toward the chamber 6 side) to move in the radial direction. The diameter of the locking tooth 9 formed by each locking claw 7 is separated so as to be expanded.

As shown in the figure, the axial cross-sectional shape of each of the locking teeth 9 is a saw-tooth shape having a tapered surface whose diameter decreases in the back side (chamber 6 side) direction. 9 is formed over the entire circumference of each locking claw.

Numeral 10 is a presser made up of a washer, which is in contact with the inner end surface of each of the locking claws 7 and also has a case 2
It is provided so as to be movable in the axial direction. Numeral 11 is a stopper made of a C-shaped retaining ring, which is a spring as an urging member, more specifically, a coil spring 12 is compressed and housed in the chamber 6, and then fitted in a groove 13 formed in one part of the case 2. It is equipped with. As a result, each locking claw 7 is constantly biased by the biasing member 12 toward the smaller diameter side of the tapered surface 5.

Both the presser plate 10 and the stopper plate 11 have through holes 10a and 11a in the center thereof.
The rod to be connected penetrates through 0a and 11a.
Reference numeral 14 denotes the other connecting body, and has the other cylindrical case 15 having holes with both ends open. A connection hole 16 is formed in the other end of the case 15, and the inner periphery of the hole 16 is
A female screw 17 with which the male screw 3 engraved on the one connection body 2 is screwed is engraved. An insertion opening 18 for inserting a connected rod is axially formed in the other body opposite to the female screw 17. Further, in the case 15, the insertion opening 1
An insertion hole 19a is formed in the axial direction. The insertion hole 19a is a truncated cone-shaped tapered surface 19 that widens from the inner side of 8 toward the connection hole 16 side. Further, a chamber 20 having a hole having the same diameter as the inner diameter of the tapered surface 19 is formed in the axial direction from the inner end of the hole 19a toward the connecting hole 16.
6 communicates with the opening.

Reference numeral 21 denotes a second locking claw, the outer peripheral surface of which is formed as a tapered surface 22 along the tapered surface 19 and the inner surface of which has locking teeth 23 in the axial direction parallel to the axis of the case 15. Has been formed. Further, the second locking claw 21 is divided into three in the circumferential direction like the first locking claw 7,
With these three locking claws 21 aligned in the circumferential direction, as shown in FIG. 4, the tips of the respective locking claws 21 (right side of the figure).
Is located at the minimum diameter end (left side) of the tapered surface 19 and is accommodated in the insertion hole 19a. Further, the locking claw 2
The length in the axial direction of 1 is set so that the inner portion (left end) thereof is shorter than the axial length of the tapered surface 19 in the above-mentioned stored state. Each locking claw 21 is housed with its tapered surface 22 slidable on the tapered surface 19 of the case 15, and each locking claw 21 moves along the tapered surface 19 to the inner side (room 20 side). As a result, the locking teeth 23 formed by the locking claws 21 are separated in the radial direction, and the diameter of the locking teeth 23 is increased.

The cross-sectional shape of each locking tooth 23 in the axial direction is
As shown in the drawing, it is formed in the shape of a saw tooth having a tapered surface whose diameter is reduced in the inner side (room 20 side) direction, and the locking teeth 23 are formed over the entire circumference of each locking claw 21. .

Reference numeral 24 is a presser foot consisting of a washer, which is in contact with the inner end surfaces of the locking claws 21 and is movable in the axial direction of the case 15. Reference numeral 25 is a retaining ring composed of a C-shaped retaining ring, which is a spring as an urging member, more specifically, a coil spring 26 is compressed and housed in the chamber 20 and then fitted into a groove 27 formed in a peripheral wall of the chamber 20. It is equipped. As a result, each locking claw 21 is pushed into
2, the taper surface 19 is constantly urged toward the smaller diameter side.

Both the presser foot 24 and the retaining ring 25 have through holes 24a and 25a in the center thereof.
The connected rod penetrates 4a and 25a.
Reference numeral 28 denotes a disk-shaped stopper, which is loosely fitted in the inner portion of the connection hole 16.

The cutout surface 2 is formed on the outer peripheral surface of each of the case 2 of the one connection body 1 and the case 15 of the other connection body 14.
9 and 30 are formed, and a jig is engaged with this to rotate both cases 2 and 15. Further, each of the above members is made of metal.

Next, the connection method will be described. As shown in FIG. 4, when the connecting rod is not inserted, the first
Of the tapered surfaces 5 and 19 by the biasing force of the coil spring 12 which is the biasing member, and the second locking claw 21 which is the biasing force of the coil spring 26 which is the biasing member.
4 is pressed toward the smaller diameter side, and is in the state of FIG. At this time, the inner diameters of the crests of the locking teeth 9 and 23 formed by the locking claws 7 and 21 are the same as the connected rods to be connected, for example, the ribs 31a of the deformed reinforcing bars 31 and 32 shown in FIGS. , 32a.

Then, as shown in FIG. 5, the male screw 3 of the one connecting body 1 is screwed into the female screw 17 of the other connecting body 14 to connect the two connecting bodies 1, 14. As shown in FIG. 5, this connection is performed by tightening both screws completely, without removing the screw 2 on the screw-side tip end surface 2a of the case 2 in one connecting body 1 and the inner wall surface 15a of the hole 16 in the other connecting body 15, specifically, Tighten so that a gap D is formed between the stopper 28 and the front surface.

Next, in the above-mentioned connected state, as shown in FIG. 6, the deformed rebar 31, which is one of the connecting rods, is inserted from the insertion hole 4 of the one connecting body 1 until the insertion tip 31b of the deformed reinforcing bar 31 hits the stopper 28. To do. At the time of inserting the deformed rebar 31, the rib 31a hits the locking tooth 9 of the locking claw 7, and the locking claw 7 resists the biasing force of the coil spring 12 to the right in FIG. Is moved to the larger diameter side of. By this movement, each locking claw 7 is pushed open in the radial direction, the inner diameter of the crest of the locking tooth 9 formed by each locking claw 7 becomes larger than the outer diameter of the rib 31a of the deformed reinforcing bar 31, and the deformed reinforcing bar 31 is Is inserted. After the deformed rebar 31 is inserted, each locking claw 7 is pressed to the left in FIG. 6 by the urging force of the coil spring 12 to reduce its diameter, and each locking tooth 9 is formed on the surface or rib of the deformed rebar 31. It locks to the side part of 31a.

In this state, the rib 31a of the deformed reinforcing bar 31 is formed.
The locking tooth 9 and the locking tooth 9 are rarely completely coincident with each other, and a clearance similar to the clearance D shown in FIG. 8 is generated, and the connecting body 1 and the deformed reinforcing bar 31 are slightly loose in the axial direction. May occur.

Next, in the state shown in FIG. 6, the insertion hole 18 of the other connecting body 15 is made to face the tip of the deformed rebar 32 which is the other connected rod, and one deformed rebar 31 and both connecting bodies 1, 15 are connected. Is pressed to the other deformed rebar 32 side. As a result, the other deformed rebar 32 is inserted into the insertion hole 1 as shown in FIG.
8, the tip end surface 32b contacts the stopper 28, and the insertion is stopped. At the time of this insertion, the rib 32a abuts on the locking teeth 23 of the locking claw 21, and the locking claw 2
1 is pushed to the left in FIG. 7, that is, to the large diameter side of the tapered surface 19 against the biasing force of the coil spring 26.
By this movement, each locking claw 21 is pushed open in the radial direction,
The inner diameter of the crest of the locking tooth 23 formed by each locking claw 21 becomes larger than the outer diameter of the rib 32a of the deformed reinforcing bar 32, and the deformed reinforcing bar 32 is inserted. After the deformed rebar 32 is inserted, each locking claw 21 is pressed by the urging force of the coil spring 26.
7 are pressed to the right in FIG. 7 to be reduced in diameter, and their locking teeth 23 are locked to the surface of the deformed bar 32 and the side surface of the rib 32a.

In this state, the rib 32a of the deformed reinforcing bar 32 is formed.
The locking teeth 23 are rarely in perfect mating engagement,
A gap similar to the gap D shown in FIG.
The deformed rebar 32 may be slightly loosened in the axial direction.

Next, in the above work, the work of eliminating the play generated between the one connection body 1 and the one deformed rebar 31 and between the other connection body 14 and the other deformed rebar 32 as described above is performed.

In this work, the jig is locked to the notched surface 29 or 30 formed with either one of the connection bodies 1 or the other connection body 14 respectively and rotated in the tightening direction of both screws 3, 17. To do. By this rotation, the two connecting bodies 1 and 14 are attracted to each other, and the engaging tooth 9 of the engaging claw 7 in the one connecting body 1 moves to the right in FIG.
Further, the locking teeth 23 of the locking claw 21 in the other connecting body 14
Moves to the left in Fig. 7 due to the rattling, and both locking teeth 9,
23 bites on the ribs 31a, 32a of the deformed reinforcing bars 31, 32, and the above rattling is eliminated.

The connection tool of the present invention can be used by simply connecting deformed reinforcing bars to each other, or as shown in FIG.
It can be used, for example, when connecting the other member B having the deformed reinforcing bar 32 to the one member A having the protruding member 1 through the deformed reinforcing bar.

Further, as the members A and B, constituent parts such as units and segments used in construction and civil engineering are conceivable, for example, but the present invention can be applied to the connection of various other parts to be connected. When the members A and B are concrete members, for example, the outer peripheral working space C of the connectors 1 and 14 shown in FIG. 8 is filled with a filler such as concrete.

Further, the connected rods 31 and 32 are deformed rebars in the embodiment shown in the drawings, but in addition, rods having screws or knurls at the portions where both the locking claws 7 and 21 are locked, Further, a normal round bar or the like having an obstructed surface may be used.

[0033]

As described above, according to the present invention,
Not only can they be easily joined simply by inserting both connected rods into the connecting body, but in particular, axial play between the connecting body and the connecting rods can be reliably prevented. Therefore, for example, in the case of joining concrete members, if the outer periphery of the connection body is covered with concrete, it is possible to prevent the occurrence of cracks in the concrete due to rattling, and it is possible to prevent rusting of the connection tool or the connected rod. .

Furthermore, the work of eliminating the rattling of the above-mentioned two connected rods can be performed simultaneously by rotating only one of the two connecting members, and the work can be performed extremely easily and efficiently in a narrow connecting space. Is especially effective for the work.

Further, the number of parts is smaller than that of connecting both connecting bodies through an intermediate member, the product cost can be reduced, and the connecting work is easy.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a connecting tool of the present invention.

FIG. 2 is an end view as seen from the left side in FIG.

FIG. 3 is an end view showing three divided locking claws.

FIG. 4 is a side sectional view showing a separated state of a connection body in the connection tool of the present invention.

5 is a side cross-sectional view in which both the connecting bodies in FIG. 4 are connected.

FIG. 6 is a side sectional view in which one connected rod is inserted in the state of FIG.

7 is a side sectional view in which the other connected rod is further inserted from the state of FIG.

FIG. 8 is a schematic plan view showing an example of a usage state of the connector of the present invention.

FIG. 9 is a cross-sectional view of essential parts showing a backlashed state in a conventional structure.

[Explanation of symbols]

1,14 ... Connector 2,15 ... Case 3,17 ... Screw 4,18 ... Insertion port 5,19 ... Tapered surface 5a, 19a ... Insertion hole 7,21 ... Locking claw 9,23 ... Locking tooth 12, 26 ... Biasing member 28 ... Stopper 31, 32 ... Connected rod

Claims (2)

[Claims] 1. A case having an insertion hole formed at one end thereof and having a tapered surface that opens toward the inner side and expands toward the back, and a case that is divided in the insertion hole in the circumferential direction and along the tapered surface in the axial direction. A locking claw that is slidably arranged on the
A pair of connecting bodies each including a locking tooth engraved on the inner peripheral surface of the locking claw and a biasing member that presses the locking claw toward the smaller diameter side of the tapered surface, and one of the connecting bodies is provided. Is provided with a stopper for the connected rod to be inserted, and a male screw is engraved on the outer peripheral surface on the opposite side of the insertion opening of the case of one of the connecting bodies, and opposite to the insertion opening of the case of the other connecting body. A connecting tool characterized in that a female screw to which the male screw is screwed is engraved on the side. 2. A case having an insertion hole formed at one end thereof and having a tapered surface that opens toward the inner side and expands toward the back, and a case that is divided in the circumferential direction in the insertion hole and that extends in the axial direction along the tapered surface. A locking claw that is slidably arranged on the
A pair of connecting bodies each including a locking tooth engraved on the inner peripheral surface of the locking claw and a biasing member that presses the locking claw toward the smaller diameter side of the tapered surface, and one of the connecting bodies is provided. Is provided with a stopper for the connected rod to be inserted, and a male screw is engraved on the outer peripheral surface on the opposite side of the insertion opening of the case of one of the connecting bodies, and opposite to the insertion opening of the case of the other connecting body. Engraving a female screw to which the male screw is screwed on the side, insert the connected rods from the insertion ports of both connecting bodies in a state in which the screws of both connecting bodies are tightened with a margin without completely tightening each other, then A connecting method comprising rotating at least one of both connecting bodies.