JPH10152991A - Fastening device of screw type reinforcement joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamping device of screw type reinforcement joints which securely holds reinforcements although it is simple in the constitution and relatively rotates to sufficiently clamp the reinforcements and the sleeve and which can hold the reinforcements, even if the diameter thereof is a little different from each other. SOLUTION: A reinforcement 100 in which a screw is cut 100a at the end and a sleeve 101 are screwed and clamped together. The first divided body 10 fixed to the sleeve 101 and the second divided part 20 holding the reinforcement 100 are connected to each other so as to be relatively rotatable around the center axis P and a clamping structure 40 is provided to relatively rotate the first and second divided bodies 10, 20. The holding structure 30 holding the reinforcement 100 in the second divided body 20 is provided with a pair of pivot shafts 22, 22 arranged parallelly to the center axis P, four movable pieces 31, 32 movably supported by these pivot shafts, and a drawing tool 34 for the mutual movable pieces 31, 32 oppositely arranged so as to set closely the contact part provided in the movable pieces 31, 32 to approach the reinforcement 100.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw-type rebar joint fastening device for screwing a sleeve and a sleeve having threaded ends to a sleeve.

[0002]

2. Description of the Related Art Conventionally, as a tightening device for a screw type rebar joint, for example, Japanese Utility Model Laid-Open No.
No. 43479 (Japanese Utility Model Application Laid-Open No. 53-21834) and Japanese Utility Model Publication No. 57-2613 (Japanese Utility Model Application Laid-Open No. 53-139138) are known. In these conventional techniques, an end of a reinforcing bar in which a lock nut is screwed into a hexagonal cross-section pipe is screwed into a threaded steel joint, and a tightening device is fitted to the lock nut and the pipe. Are rotated relative to each other so that the ends of the reinforcing bars are tightened and connected via a connecting pipe.

However, in recent years, for example, a threaded rebar joint in which, for example, a rebar having a tapered end and a sleeve is screwed together with a sleeve and these are directly rotated relative to each other to tighten them, has become widespread. When directly tightening the new screw type rebar joint by directly rotating it, it is difficult to fit the rebar side with the tightening device. Therefore, the tightening is performed using the above-described conventional tightening device. I couldn't do that.

By the way, one of a pair of contact portions to be brought into contact with the reinforcing bar is fixed, and the other contact portion is brought close to the one contact portion side by a hydraulic cylinder to hold the reinforcing bar. Devices have been devised to do this. However, this type of device requires a hydraulic pump or the like, and requires a large device configuration. Further, since one contact portion is fixed, it is not possible to cope with rebars having different diameters.

[0005]

In view of such a conventional situation, the present invention, in spite of its simple structure, has a relatively rotating structure for holding the reinforcing bar firmly and sufficiently tightening the reinforcing bar and the sleeve. It is another object of the present invention to provide a screw-type rebar joint tightening device capable of holding rebars having slightly different diameters.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the feature of the tightening device for a threaded steel joint according to the present invention is as follows.
In a configuration in which a rebar with a threaded end and a sleeve are screwed together and fastened, the first split body engaging with the sleeve and the second split body holding the rebar can be relatively rotated about a central axis. And a tightening mechanism for relatively rotating the first and second divided bodies to fasten the sleeve and the rebar whose longitudinal direction is along the central axis is provided, and the rebar is attached to the second divided body. A holding mechanism for holding, a pair of pivots arranged on both sides of the holding portion of the reinforcing bar in parallel with the central axis, and a rocking mechanism supported by two for each of the pivots; And a pulling tool that is supported by different pivots so as to bring the contact portion provided on the rocking piece close to the rebar and attracts the rocking pieces facing each other.

Here, the term "tightening mechanism" refers to, for example, a worm gear and a worm wheel that mesh with each other.
In the following embodiment, the worm gear and the worm wheel are supported by the first divided body, and the worm wheel rotates integrally with the second divided body. By operating the attracting tool and attracting opposing rocking pieces supported by different pivots so as to bring the contact portion provided on the rocking piece close to the reinforcing bar, the reinforcing bar is contacted from four directions. It is held down by the part. In addition, by adjusting the amount of attraction by the two attraction tools, it becomes possible to bring the center of the rebar held closer to the central axis of the relative rotation of the first and second divided bodies.

[0008] In the above feature, a notch for pivotally supporting a swing shaft having an enlarged portion at the tip at the free end side of one of the rocking pieces and receiving the rocking shaft at the free end side of the other rocking piece. And the screwing means for bringing the enlarged portion of the rocking shaft close to the pivot portion side of the rocking shaft constitutes the pulling tool, and each of the first and second divided bodies has A receiving groove for receiving a reinforcing bar from a direction perpendicular to the central axis P may be provided. In the embodiment of the present invention, the “oscillating shaft”
Is constituted by a swing bolt pivotally supported by a pivot parallel to the central axis, the "enlarged portion" is constituted by a pull nut screwed onto the swing bolt, and the "screw means" is replaced by the above-mentioned " It may be composed of a "swing bolt" and a "attachment nut".

According to this feature, the rebar can be easily received by the holding portion by releasing the opposing rocking piece and the rocking shaft. In addition, the revolving piece and the revolving shaft can be brought closer to the side of the rebar receiving the rebar, and the revolving shaft can be inserted into the notch, and the rebar can be easily held in the holding portion by tightening the screw means.

Other features of the tightening device for a threaded steel joint according to the present invention are almost the same as those described above, but the structure of the holding mechanism is different. A holding mechanism according to another aspect of the present invention includes a pair of sliding pieces slidable along slide shafts arranged in a direction intersecting the central axis on both sides of the reinforcing bar at the holding position, and a pair of these sliding pieces. A contact portion provided in a groove shape to receive the rebar at a portion facing the center axis,
A reverse screw shaft which is arranged parallel to the slide shaft and is screwed to each of the slide pieces in a reverse screw relationship to rotate the contact portion symmetrically toward or away from the center axis by a rotating operation; Have.

According to another feature of the present invention, the reinforcing bar inserted into the holding portion is sandwiched between the groove-shaped contact portions from both sides by rotating the reverse screw shaft. Since the contact portions are symmetrically approached or separated from each other with respect to the central axis, it is possible to bring the center of the held reinforcing bar closer to the central axis of the relative rotation of the first and second divided bodies.

[0012] In the above other feature, a receiving groove for receiving the rebar from a direction perpendicular to the central axis is provided in each of the first and second divided bodies, and the reverse screw shaft is positioned with respect to the central axis. The second divided body may be arranged on the side opposite to the opening side of the receiving groove. According to this feature, the entire tightening device can be mounted close to one side of the rebar installed at the site, and the reverse screw shaft can be rotated from the side close to the tightening device.

Further, in the above other feature, a groove-shaped contact portion provided on one of the pair of sliding pieces is configured to be swingable around an axis parallel to the central axis. Is also good. According to this feature, since the swingable contact portion follows the position of the reinforcing bar inserted into the holding portion, the contact portions located on both sides of the center axis can more reliably contact the reinforcing bar. Can be. In addition, if the swing amount of the holding portion is increased to some extent, when the reinforcing member is inserted from the direction perpendicular to the central axis by the swing of the holding portion, the holding portion swings toward the opening side of the receiving groove. It is also possible to reduce the amount of separation between the sliding pieces.

[0014]

Next, a first embodiment of the present invention will be described with reference to FIGS. The screw-type rebar joint to be tightened by using the tightening device 1 of the present invention is configured to connect opposite ends of a pair of rebars 100 by screwing with a sleeve 101. Reinforcing bar 10
0, a pair of tapered female threads 101a, 101
a is provided. Then, the tapered male screw 100a provided at each end of the reinforcing bar 100 is
01a and tightened by screwing.
Are connected to each other. The sleeve 101 is already sufficiently fastened to one rebar 100 at the time of shipment. The fastening device 1 according to the present invention is a tool for fastening the rebar 100 and the sleeve 101 on site, and includes a first split body 10 and a second split body 20 that rotate relative to each other about a central axis P. The holding mechanism 30 for holding the reinforcing bar 100 on the second divided body 20 and the sleeve 10 by relatively rotating the first divided body 10 and the second divided body 20.
1 and a tightening mechanism 40 for tightening the rebar 100 whose longitudinal direction is along the central axis P. Each member of the fastening device 1 may be made of soft iron or carbon steel, or may be made of FRP or the like.

The main part of the first divided body 10 comprises a main body 11 having a receiving groove 10a on the front and a hollow part 11a inside. A locking portion 12 for inserting and fitting the sleeve 101 from the front is provided below the receiving groove 10a in the main body 11. The upper part of the main body 11 has the lid 1
3, both sides of the housing portion of the worm gear 42 are closed by a pair of shaft holding members 14 with the drive shaft 41 protruding as described later.

The second divided body 20 includes an upper plate 21, a pair of pivots 22, a lower plate 23, and a rotating shaft 24, which are continuous downward from above. Each of the pivots 22 is arranged parallel to the central axis P. A receiving groove 20a for receiving the reinforcing bar 100 is provided on the front surface of each member constituting the second divided body 20 as before. The rotating shaft 24 is supported by the main body 11 so as to be rotatable around the central axis P by a pair of upper and lower bearings 24a, 24a.

The main part of the holding mechanism 30 is composed of four first and second swinging pieces 31 and 32 and a pulling tool 34. One set of the first and second rocking pieces 31, 32 is pivotally supported for each pivot 22,
First and second rocking pieces 31, 32 pivotally supported by each pivot 22
Are arranged in a point-symmetric relationship with respect to the central axis P. Separate contact portions 33 made of a hard member are provided on the surfaces of the first and second rocking pieces 31 and 32 facing the reinforcing bar 100, respectively. A plurality of small vertical grooves are formed on the surface of each contact portion 33 facing the reinforcing bar so as to have many non-slip steps in plan view.

A notch 32a is formed on the free end side of the second rocking piece 32 in the horizontal direction. A similar notch is also formed on the free end side of the first rocking piece 31, and the end of the rocking bolt 35 is inserted into this notch, and the rocking bolt 35 is held in a posture that keeps the pivot 35a parallel to the pivot 22. The swinging bolt 35 is swingably supported on the first swinging piece 31 by penetrating through the first swinging piece 31. The free end of the swing bolt 35 is screwed with a pull nut 36 together with a washer.
By inserting the first and second swinging pieces 31 and 32 into each other by inserting the first and second swinging pieces 31 and 32 into each other by inserting them into the 2a, a pulling tool 34 is configured.

A tightening mechanism 40 for driving the first and second divided bodies 10 and 20 so as to be relatively rotatable about a central axis P includes a drive shaft 41 penetrating in a horizontal direction in a front view in a horizontal plane of the tightening device 1. And a worm gear 42 which is key-fitted thereto, and a worm wheel 43 which is key-fitted to the rotating shaft 24 of the second divided body 20. A receiving groove 20a for receiving the reinforcing bar 100 is also formed on the front side of the worm wheel 43, similarly to the rotary shaft 24 described above. Also, the drive shaft 41
Are supported by the first divided body 10 via the shaft holding members 14, 14 and the bearings 41a, 41a. Both ends of the drive shaft 41 are formed in a hexagonal shape in a side view, and serve as input shafts for driving rotation by the ratchet spanner 110 or the like. The worm gear 42 is a single worm and serves as a booster when the second divided body 20 rotates relative to each other. Both ends of the worm wheel 43 on the side of the receiving groove 20a are bolts 43a,
The worm wheel 43 is fixed to the rotating shaft 24 by 43a to prevent the two ends of the worm wheel 43 from floating due to the engagement with the worm gear 42.

Next, a method of using the above-described tightening device 1 will be described. The upper rebar 100 is screwed into the sleeve 101 already tightened with the lower rebar 100. In this state, while holding the main body handle 2 and the rod handle 3 of the fastening device 1 by hand, the rebar 1 is inserted into the receiving grooves 10a and 20a.
00, the fastening device 1 is brought close to the reinforcing bar 100, and the sleeve 101 and the locking portion 12 are fitted.
Unlike the drawing, the rebar 100 may be arranged in the horizontal direction, but in such a posture, the receiving groove 10
When the rebar 100 is received in the a and 20a, the gripping devices 2 and 3 are gripped so that the movement of the tightening device becomes particularly easy. Of course, as shown in FIG.
a, Attraction tool 3 for first and second rocking pieces 31, 32 on the side of 20a
4 is left open. The pulling tool 34 of the first and second rocking pieces 31, 32 located on the opposite side to the receiving groove 10a may be lightly tightened.

Next, as shown in FIG. 5B, the first and second rocking pieces 31 and 32 facing each other are attracted to each other by the attracting tool 34. Thus, the reinforcing bar 100 is sandwiched from all sides by the contact portions 33, and the slip between the second divided body 20 and the reinforcing bar 100 is sufficiently restricted. By adjusting the amount of tightening of the attraction nut 36 in each attraction tool 34, the rebar 1
It is possible to make the center of the cross section orthogonal to the longitudinal direction of 00 substantially coincide with the center axis P of the relative rotation in the first and second divided bodies 10 and 20. In addition, it is possible to firmly hold rebars having slightly different diameters, and there is no need to finely set the number of rebars to be tightened.
Thereafter, the ratchet spanner 110 is fitted to the end of the drive shaft 41, and the drive shaft 41 is rotated to rotate the second divided body 20 and the first divided body 10 relatively, and
And the sleeve 101.

Next, another embodiment of the present invention will be described. In the following embodiments, the same members as those in the first embodiment are denoted by the same reference numerals.

In the second embodiment shown in FIGS. 6 to 8, the shapes of the first and second rocking pieces 37 and 38 and the structure of the attracting tool 34 are different. That is, in the first embodiment described above, the ends of the first and second rocking pieces 31 and 32 are attracted to each other, but in the present embodiment, the first and second rocking pieces are closer than in the previous embodiment. By extending the free ends of 37 and 38 and separating the free ends by pushing the push bolt 37 a in a state where the free ends intersect, the contact portions 33 are opposed to each other so as to approach the reinforcing bar 100. The second rocking pieces 37 and 38 are configured to attract each other.

The first and second rocking pieces 37 and 38 are respectively supported by the respective pivots 22 so as to be pivotable, and are arranged point-symmetrically about the central axis P for each of the pivots 22 in plan view. This is similar to the first embodiment. The first rocking piece 37 is formed to have a narrow width in the vertical direction along the longitudinal direction of the pivot 22, and is configured to be able to pass through a groove 38 a formed in a vertical middle part of the second rocking piece 38. It is. The free end side of the first rocking piece 37 is formed longer in the direction away from the pivot 22, and a push bolt 37a is screwed to the free end. The free end side of the second swinging piece 38 also extends to the side away from the pivot 22, and the free end side has a contact piece 38b.
A hinge 38c, which is substantially L-shaped in plan view, is swingably connected to the hinge 38c.

At the time of use, as shown in FIG. 6A, the first rocking piece 37 is first opened while the second rocking piece 38 is opened.
The first rocking piece 37 is rocked so that the contact portion 33 of the first rocking member approaches the reinforcing bar 100. Next, the second rocking piece 38 is similarly rocked so that the first rocking piece 37 enters the groove 38 a of the second rocking piece 38. In this state, the contact piece 38b is swung about the hinge 38c, and the tip is slid between the free ends of the first and second swing pieces 37 and 38. Thereafter, the push bolt 37a is rotated to make contact with the contact piece 38b, and the push bolt 37a is pushed in so as to separate the free ends of the first and second rocking pieces 37 and 38 from each other, thereby forming four contact pieces. The reinforcing bar 100 is held by the portion 33.

The third embodiment shown in FIG. 9 relates to a modification of the projection 33a for providing the contact portion 33 with a non-slip effect. Each projection 33a includes a lower side surface 33b and an upper side surface 33c in a plan view. In the present embodiment, the lower side surface 33b located on the lower side in the rotation direction T about the center axis P among the two surfaces is formed. The difference is that it is formed so as to stand out from the upper side surface 33c. That is, the contact surface 3 of the contact portion 33
The intersection angle with 3d is lower side 33 than the upper side 33c.
It is configured so that b becomes larger. With this configuration, the effect of holding the reinforcing bar 100 by the protrusion 33a of the contact portion 33 is further improved.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the rebar 100 and the sleeve 1 having a smaller diameter than those of the first and second embodiments are used.
01 is a tightening device 1 suitable for tightening the first embodiment, and the whole is made smaller and lighter than the previous embodiment.
Since the main body handle 2 has an L-shape in side view and is small and lightweight as a whole, the rod handle 3 for the second divided body 20 is not provided. The tightening device 1 of the present embodiment is basically the same as the first and second embodiments, but the configurations of the second divided body 20 and the holding mechanism 50 are different as described later.

In the second divided body 20 in this embodiment, an upper plate 21 and a lower plate 23 each having a receiving groove 20a are connected by a pair of connecting plates 25, 25 and connecting bolts 26, 26. The tip of a connection bolt 26 that passes through the connection plate 25 without screwing into the through hole 25 a is screwed to the lower plate 23. The sliding pieces 51, 52 positioned so as to sandwich the receiving groove 20a on the left and right of the central axis P in plan view in FIG. 11 are a pair of upper and lower slide shafts 53, 53 connecting the pair of connecting plates 25, 25.
Are slidably supported via slide holes 51a, 51a. In this example, the slide shaft 53 is disposed perpendicular to the center axis P and the receiving groove 20a. Although not shown, the sliding pieces 51 and 52, the slide shaft 53 and the connecting plate 25 are configured symmetrically on the left and right of the central axis P. Each slide shaft 5
3 are connected to the connecting plates 25 by set screws 53a, respectively.
And the distance between the pair of connecting plates 25 is determined. The reverse screw shaft 54 includes a right-hand thread 54 a that is screwed into the screw hole 51 b of the sliding piece 51, and a left-hand thread 54 b that is screwed into the screw hole 52 b of the sliding piece 52. Both ends penetrate the connecting plates 25, 25 at the left and right ends at intermediate height positions of the slide shafts 53, 53 with the washers 56, 56 locked to the steps, respectively, to restrict the movement in the left-right direction. It is pivoted by this in a state. Further, one end of the reverse screw shaft 54 has a deformed portion 54c that can be rotated by a spanner or the like.

The opposite contact portions 33 of the sliding pieces 51 and 52 form two V-shaped grooves as viewed in the direction of the central axis P, two contact pieces 33 similar to those in the previous embodiment. Are located in The two contact portions 33, 33 on the sliding piece 51 side are provided on a swinging piece 55 different from the sliding piece 51, and the swinging piece 55 is a swinging shaft 55a arranged in parallel with the central axis P. By contact part 3
3 and 33 are rocked. A concave portion is formed inside the sliding piece 51 so as to receive the rocking piece 55, and the rocking shaft 5
5a is supported by the sliding piece 51 on the upper and lower sides.

In order to tighten the reinforcing bar 100 and the sleeve 101 using the tightening device 1 according to the present embodiment, first,
The openings of the receiving grooves 10a and 20a are aligned with each other,
Is inserted in the vicinity of the central axis P, and the tightening device 1 is brought close to the reinforcing bar 100 installed at the site or the like. The swinging piece 55 tilts the contact portions 33, 33 around the swinging shaft 55a toward the opening side of the second divided body 20. Even if the separation distance between the sliding pieces 51, 52 is not so short, the swinging piece 55 can be used. Makes insertion easier. The reverse screw shaft 54 is rotated by the deformed portion 54c to bring the sliding pieces 51 and 52 close to each other. Left and right contact portions 33, 33
Receives the reinforcing bar 100 in a V-shaped groove that is orthogonal to each of the right and left sides. Although the center axis P and the center of the reinforcing bar 100 basically basically coincide with each other, even if a slight displacement occurs between them, the inclination of the rocking piece 55 around the rocking shaft 55a causes the four contact portions to be inclined. Reference numeral 33 abuts on the outer surface of the reinforcing bar 100, and can hold it firmly.

Finally, another embodiment of the present invention will be described. In each of the above embodiments, the swinging bolt 35, the pulling nut 36, and the pushing bolt 37a are used as the pulling tool 34.
However, a cam mechanism other than the screw means may be used for the attracting tool 34. For example, in the first embodiment, the free ends of the opposing swinging pieces 31 and 32 can be configured to be attracted by cam means such as a quick lever of a bicycle. Further, instead of the swing bolt 35 and the pull nut 36, a hexagonal bolt having an enlarged head may be used, and the pivot 36a may be rotatable and the tip of the hexagonal bolt may be screwed.

In the above embodiment, a worm and a worm wheel are used for the tightening mechanism 40. However, a planetary gear mechanism other than the worm or a booster other than the gear means can be used.

[0033]

As described above, according to the feature of the above-described tightening device for a screw type rebar joint according to the present invention, the rebar is pressed down from all directions by the contact portions provided on the rocking piece, so that the rebar is Holds firmly on the split. In addition, since the center of the reinforcing bar to be held can be adjusted so as to be closer to the center axis of the relative rotation of the first and second divided bodies, it is possible to hold the reinforcing bars having slightly different diameters, and furthermore, due to the misalignment of the shaft. An unnecessary bending moment or the like does not act between the reinforcing bar and the sleeve, and the reinforcing bar and the sleeve can be accurately tightened.

According to another feature of the above-mentioned tightening device for a screw type rebar joint according to the present invention, the holding portions are inserted into the groove-shaped holding portions by the turning operation of the reverse screw shaft. , The rebar is firmly held by the second split. Further, since the center of the reinforcing bar to be held can be close to the center axis of the relative rotation of the first and second divided bodies, similar to the above-described feature, it is possible to hold even a reinforcing bar having a slightly different diameter, and In addition, it is possible to prevent an unnecessary bending moment or the like from acting between the reinforcing bar and the sleeve and to accurately tighten the reinforcing bar and the sleeve.

It should be noted that the reference numerals in the claims are merely for convenience of comparison with the drawings, and the present invention is not limited to the configuration of the accompanying drawings by the description. .

[Brief description of the drawings]

FIG. 1 is a front view of a fastening device for a screw-type rebar joint according to the present invention.

FIG. 2 is a side view of the fastening device.

FIG. 3 is a sectional view taken along line AA in FIG.

FIG. 4 is a plan view of the fastening device.

FIG. 5 is a plan view of the fastening device with the upper plate omitted;
(A) is a figure which shows the state which opened the holding mechanism, (b) shows the procedure which closes a holding mechanism.

FIG. 6 is a view corresponding to FIG. 5, showing a second embodiment of the fastening device.

FIG. 7 is a front view of a holding mechanism according to a second embodiment.

FIG. 8 is a side view of a second rocking piece according to the second embodiment.

FIG. 9 is a plan view showing a third embodiment relating to modification of a contact portion.

FIG. 10 is a diagram corresponding to FIG. 2 according to a fourth embodiment.

11 is a sectional view taken along line BB in FIG. 10;

FIG. 12 is a sectional view taken along line CC in FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tightening device 2 Main body handle 3 Rod handle 10 First divided body 10a Receiving groove 11 Main body 11a Cavity part 12 Locking part 13 Cover 14 Shaft holding member 20 Second divided body 20a Receiving groove 21 Upper plate 22 Axis 23 Lower plate 24 Rotating shaft 24a Bearing 25 Connecting plate 25a Through hole 26 Connecting bolt 30 Holding mechanism 31 First rocking piece 32 Second rocking piece 32a Notch 33 Contact part 33a Projection 33b Lower side surface 33c Upper side surface 33d Contact surface 34 Attachment tool 35 Oscillating bolt (oscillating shaft) 35a Axis 36 Attraction nut (enlarged portion) 37 First oscillating piece 37a Push bolt 38 Second oscillating piece 38a Groove 38b Contact piece 38c Hinge 40 Tightening mechanism 41 Drive shaft 41a Bearing 42 Worm gear 43 Worm wheel 43a Lock bolt 50 Holding mechanism 51 Sliding piece 51a Sliding hole 51b Screw Hole 52 Sliding piece 52b Screw hole 53 Slide shaft 53a Set screw 54 Reverse screw shaft 54a Right screw 54b Left screw 54c Deformed part 55 Swing piece 55a Swing shaft 56 Washer 100 Rebar 101 Sleeve 100a Tapered male screw 101a Tapered female screw 110 Ratchet spanner P Center axis T Rotation direction. .

Claims (5)

[Claims] 1. A screw-type rebar joint tightening device for screwing a rebar (100) having a threaded end (100a) and a sleeve (101) together and tightening the rebar (100a). A first divided body (10) to be engaged and a second divided body (20) holding the rebar (100) are connected so as to be relatively rotatable around a central axis (P), and the first and second divided bodies are connected to each other. (10, 20) A tightening mechanism (40) is provided for tightening the sleeve (101) and the rebar (100) whose longitudinal direction is along the center axis (P) by rotating the rebars relative to each other. ) Is provided on the second divided body (20). The holding mechanism (30) includes a pair of reinforcing members (100) arranged on both sides of the reinforcing bar (100) at a holding position in parallel with the central axis (P). An axis (22, 22);
Two swinging pieces (31, 32, 37, 38) supported for swinging by two for each of the pivots (22, 22) and provided on the swinging pieces (31, 32, 37, 38). Contact part (3
3) supported by different pivots (22, 22) so as to approach the rebar (100),
1,32,37,38) A tightening device for a screw-type rebar joint having a puller (34) for attracting each other. 2. The pulling tool (34) pivotally supports a swing shaft (35) having an enlarged portion (36) at the tip at the free end side of one of the swing pieces (31). Notch (32a) for receiving the swing shaft (35) at the free end side of the swing piece (32).
And the enlarged portion (3) of the swing shaft (35).
6) is provided with a screw means (35, 36) for bringing the pivot shaft (35) closer to the pivot (35a) side, and the rebar is provided on each of the first and second divided bodies (10, 20). 2. A tightening device for a screw-type rebar joint according to claim 1, wherein receiving grooves (10a, 20a) for receiving (100) from a direction orthogonal to said central axis (P) are provided. 3. A tightening device for a screw-type rebar joint for fastening a rebar (100) having a threaded end (100a) to a sleeve (101) by screwing the rebar (100) to the sleeve (101). A first divided body (10) to be engaged and a second divided body (20) holding the rebar (100) are connected so as to be relatively rotatable around a central axis (P), and the first and second divided bodies are connected to each other. (10, 20) A tightening mechanism (40) is provided for tightening the sleeve (101) and the rebar (100) whose longitudinal direction is along the center axis (P) by rotating the rebars relative to each other. ) Is held on the second divided body (20), and the holding mechanism (50) is provided.
Are slide shafts (5) arranged on both sides of the reinforcing bar (100) at the holding position in a direction intersecting with the central axis (P).
3, 53) and a pair of sliding pieces (51, 5) slidable along them.
2) and a contact portion (33, 33) provided in a groove shape to receive the reinforcing bar (100) in a portion of each of the sliding pieces (51, 52) opposed to the central axis (P). The contact portions (33, 33) are disposed in parallel with the slide shafts (53, 53) and screwed to the respective slide pieces (51, 52) in a reverse screw relationship to each other, and rotated to operate. A device for tightening a threaded rebar joint having a reverse threaded shaft (54) symmetrically approaching or spaced apart with respect to said central axis (P). 4. A receiving groove (10a, 20) for receiving the rebar (100) in each of the first and second divided bodies (10, 20) from a direction orthogonal to the central axis (P).
a), and the reverse screw shaft (54) is connected to the center axis (P).
The tightening device for a screw-type rebar joint according to claim 3, wherein the second split body (20) is disposed on a side opposite to an opening side of the receiving groove (20a). 5. A groove-shaped contact portion (33) provided on one of said pair of sliding pieces (51, 52) swings around an axis (55a) parallel to said central axis (P). 5. The tightening device for a screw-type rebar joint according to claim 3, which is capable of being used.