JP2722394B2 - Rebar anchoring jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar fixing jig suitable for use in a joint between a column and a beam in a reinforced concrete structure.

[0002]

2. Description of the Related Art FIGS. 10 to 12 are views showing one example of a conventional method of fixing a reinforcing bar. Conventionally, when an end of a reinforcing bar is fixed in concrete as in a case where a beam bar is fixed to a column body in a reinforced concrete structure, as shown in FIGS. 10 is bent into a U-shape as shown in FIG. 10 or an L-shape as shown in FIG. Pull-out strength is ensured. However, bending each end of the reinforcing bar 33 as described above is time-consuming and complicated, and at the joint between the column and the beam, the reinforcing bars on the column side and the beam side interfere with each other. However, there is an inconvenience that the arrangement of the bars is complicated and the construction is difficult. Therefore, as a method for omitting such bending of a reinforcing bar, as shown in FIG. 12, a reinforcing bar 34 whose entire length or at least an end is threaded is used, and nuts 35, 35 and the like are used for this. Attach a suitable reaction force plate 36 to increase the pullout resistance by the reaction force plate 36 so that the reinforcing bar 34 whose straight end is not bent is fixed in the concrete. There are ways.

[0003]

However, in order to provide the reinforcing bars 34 having such straight bars with sufficient fixing strength, a considerably large nut 35 and a reaction force plate 36 are required. In the example shown in (1), since the diameter φn of the reinforcing bar 34 is designed in advance, the nut diameter D6 of the nut 35 screwed to the end of the reinforcing bar 34 is also limited. Therefore, in order for the rebar 34 to exhibit sufficient pull-out resistance, it is necessary to increase the width W1 of the reaction force plate 36 or to increase the length L3 of the fixing portion formed by the nuts 35 and 35 and the reaction force plate 36. However, no matter which method is used, the main column 51
There is a concern that interference may occur between these methods, which is not preferable. The nut 35 and the reinforcing bar 3 of the reaction force plate 36
The attachment to 4 is performed at the construction site. However, since sandwiching the reaction force plate 36 between the two nuts 35, 35 is a complicated operation, the finish varies greatly depending on the construction state. . In other words, if the two nuts 35 are not sufficiently fastened to each other, there is a risk that a reinforcing bar whose actual fixing strength becomes insufficient may occur. In view of the above circumstances, the present invention provides a reinforcing bar fixing jig which is capable of obtaining a uniform and reliable fixing strength while simplifying the construction when embedding the end of the reinforcing bar in concrete. Is what you do.

[0004]

That is, the present invention has a main body (9) which can be embedded in a concrete structure (2),
A threaded portion (92) into which a reinforcing bar (61) to be fixed in the form of a male screw (61b) formed on the outer periphery of the main body (9) is screwed. A female screw (93) that can be screwed with a male screw (61b) is provided, and a reinforcing bar pressing means (8) is screwed into the main body (9) into the screwing portion (92). Are provided in such a manner that the end face (61c) can be pressed. Further, the rebar pressing means (8) is provided with the screwed portion (92).
The rebar fixing jig (7) is constituted by the elastic body (11) housed therein. In addition, the main body (9)
A through hole (94) is provided so as to allow the bottom (92a) of the screwed portion (92) to communicate with the outside of the main body (9), and a reinforcing bar engagement confirming member (10) is provided in the through hole (94).
Is slidably provided along the through hole (94) in such a manner that the tip (10e) thereof can protrude from the main body (9), and the screwing of the rebar engagement confirming member (10) is performed. The reinforcing bar abutment portion (10c) is provided on the side of the portion (92) to form a reinforcing bar fixing jig (7). Further, a through hole (94) is formed in the main body (9), and a bottom portion (92) of the screwed portion (92) is formed.
a) and the outside of the main body (9) are provided so as to communicate with each other, and a bolt body (17) serving as a reinforcing bar pressing means (8) is inserted into the through hole (94) with respect to the screwed portion (92). The rebar fixing jig (7) is removably screwed together. Further, the rebar pressing means (8) is provided with the screwed portion (9).
The rebar fixing jig (7) is characterized in that the bottom (92a) of (2) is formed to be elastically deformable by a rebar (61) screwed into the screwed portion (92). The numbers and the like in parentheses are for convenience showing the corresponding elements in the drawings, and therefore, the description is not limited to the description on the drawings. The same applies to the following operation columns.

[0005]

With the above construction, the reinforcing bar pressing means (8) presses the end face of the reinforcing bar (61) screwed into the screwed portion (92), whereby the reinforcing bar (61) is pressed along its axial direction. Then, the male screw (61b) of the rebar (61) is pressed against one side of the female screw (93) of the threaded portion (92) to form the contact portion (60), and the main body (9) is formed. ) Is buried in the concrete structure (2). In addition, the elastic body (11) has a threaded portion (9
In 2), the elastic body (11) acts to press the end face (61c) of the reinforcing bar (61) by the elastic force of the elastic body (11) itself. The end face (61c) of the reinforcing bar (61) screwed into the screwed portion (92) is engaged with the engagement confirmation member (1).
0) abuts against and presses against the reinforcing bar contact portion (10c), and the engagement confirmation member (10) slides along the through hole.
The tip (10e) acts so as to protrude outward from the main body (9). The bolt body (17) is connected to the main body (9).
From the outside through a through hole (94).
It acts to press the end face (61c) of the rebar (61) in the form of entering 2). Further, the bottom portion (92a) is pressed by the end surface (61c) of the reinforcing bar (61) and acts to press the reinforcing bar (61) in a form of being elastically deformed.

[0006]

FIG. 1 is a view showing an example of a column / beam joint structure in which a reinforcing bar is embedded using an embodiment of a reinforcing bar fixing jig according to the present invention, and FIG. 2 is a detailed view of the reinforcing bar fixing jig shown in FIG. 3, FIG. 3 is a view taken in the direction of the arrow III in FIG. 2, FIG. 4 is a cross-sectional side view showing a state in which no rebar is fitted in the rebar fixing jig shown in FIG. 2, and FIG. 5 is a rebar anchor shown in FIG. FIG. 6 is a perspective view showing an engagement confirming pin portion of the jig, FIG. 6 is a diagram showing another embodiment of the reinforcing bar fixing jig according to the present invention, and FIG. 7 is a further embodiment of the reinforcing bar fixing jig according to the present invention. 8 and FIG. 8 are diagrams showing still another embodiment of the reinforcing bar fixing jig according to the present invention, and FIG. 9 is a diagram showing still another embodiment of the reinforcing bar fixing jig according to the present invention.

[0007] As shown in FIG.
The column 2 has columns 2 made of reinforced concrete having a rectangular cross section, and each column 2 has a column main bar 51 made of a deformed steel bar or the like having a shape extending in a vertical direction which is a direction in which the column 2 extends.
Are buried in the cross section of the column 2 by a predetermined number. In the column 2, a plurality of column hoop bars 52 each formed of a deformed steel bar or the like which is bent in the horizontal direction so as to surround the column main bar 51 are formed at a substantially predetermined pitch in the vertical direction in FIG. Each of the column hoop bars 52 is connected to and integrated with the column main bar 51 by welding or the like.

As shown in FIG. 1, a beam connecting portion 2a is provided at a predetermined position shown on the left side of the column 2 near the center in the vertical direction in FIG. A beam 3 made of reinforced concrete extends from the beam connecting portion 2a in the horizontal direction shown on the left side of FIG. 1 and is suspended between the column 2 and a column arranged at a portion (not shown) on the left side of FIG. And it is connected and arranged here. Each of the beams 3 is made of a deformed screw bar or the like that extends in the horizontal direction which is the direction in which the beams 3 extend.
Beam main bar 61 which is a reinforcing bar to be fixed in pillar 2 by
A predetermined number of reinforcing bars are buried and arranged in the cross section of the beam 3, and each of the beams 3 has a deformed steel bar bent in a direction crossing the plane of FIG. A plurality of beam hoop reinforcing bars 62 are connected to and integrated with the beam main reinforcing bars 61 by welding or the like, and are buried at a substantially predetermined pitch in the left-right direction in FIG.

As shown in FIG. 2, the beam main bar 61 is provided with a thread bar 61b having an external thread formed on the outer periphery thereof in a spiral shape over the entire length of the column main bar 61 in the left-right direction in FIG. The main beam 61 is formed in a continuous manner in a projecting manner, and the end 61a shown at the right end of FIG. 1 is arranged near the right end of FIG. 1 in the column 2 as shown in FIG. Is buried and set in reinforced concrete. The beam main bar 61 is provided with a fixing body 7 at an end 61a thereof.
2 and a screw groove 93 (shown in FIG. 2) formed in the cap 9 of the fixing member 7 in FIG.
As shown in the figure, the screw is attached by a predetermined fitting length L4 so as to maintain a predetermined fixing strength, and the main beam 61 is attached to the cap 9 of the fixing body 7 by the screw 9.
Is embedded in the column 2 so that the pull-out resistance from the column 2 is increased.

That is, as shown in FIG. 2 or FIG. 3, the fixing member 7 has a cap 9 which is a main body which is embedded in the pillar 2 which is a concrete structure.
The outer diameter D1 is larger than the outer diameter of the main beam 61, and is formed into a hat shape by cast iron or steel. As shown in FIG. 2, inside the cap 9, as shown in FIG. 2, a rebar screw hole 92 into which the beam main bar 61 to be fixed is screwed is formed to open toward the left side of FIG. The main beam 61 is formed into a recessed hole having a predetermined depth L1 so that it can be screwed into the reinforcing screw hole 92 through an opening 92b on the left side of the insertion hole 92 in FIG. Inside the rebar screw hole 92, a screw groove 93 is a male screw formed on the outer periphery of the beam main bar 61.
1b is formed in a female screw shape so as to be screwable with the screw thread 1b.
b and a sufficient margin (that is, a form in which a gap 15 can be formed between the screw bar 61b and the screw groove 93 as shown in FIG. 2). In addition, a flange portion 91 is provided at the left end of FIG.
Outer diameter D of the body of the cap 9 other than the flange portion 91
It is formed in a substantially disk shape with an outer diameter D2 larger than 1. Further, a through hole 94 having a predetermined diameter D3 communicates with the bottom end 92a of the reinforcing screw hole 92 toward the outside of the cap 9 toward the right side in FIG. An engagement confirming pin 10 for confirming the screwing state of the reinforcing bar screwed into the reinforcing bar screwing hole 92 is formed in the through hole 94 in the shaft portion 10.
a is fitted into the through-hole 94, and the leading end thereof is shown in FIG.
The base end 10e shown at the right end is slidably provided along the through hole 94 so that the base end 10e can protrude toward the right side in FIG.

That is, as shown in FIG. 5, the engagement confirming pin 10 has a shaft portion 10a formed in a round shaft shape with an outer diameter D5 slightly smaller than the diameter D3 of the through hole 94. The rear side (the left side in FIG. 2) of the shaft portion 10 a in FIG.
The disk-shaped plate 10b having a diameter D4 larger than the diameter D3 of the through hole 94 is fixed to the shaft 10a by welding or the like.
It is attached here in a form that is integrated with it. Plate 10
b is a reinforcing bar contact portion that can be in contact with the flat end surface 61c of the beam main reinforcement 61 shown on the right side of FIG. Contact part 10c
Are formed in a substantially circular shape, that is,
As shown in FIG. 2, the engagement confirmation pin 10 of the fixing body 7 in a state where the beam main reinforcing bar 61 is screwed into the pillar 2 and buried in the column 2
Is in contact with the end face 61c of the main beam 61.

As shown in FIG. 2, the engagement confirmation pin 10 has a base end 10e shown on the right end side of FIG.
In the present embodiment, the engagement confirmation pin 10 is always protruded from the cap 9 to the outside shown on the right side of FIG. 2 through the through hole 94. The engagement confirmation pin 10 is located near the base end 10e of the shaft 10a. A round hole 10d is formed in a direction intersecting the shaft direction of the shaft portion 10a. In the round hole 10d, the round hole 10
A split pin 12 having a shape corresponding to the diameter of d is fitted and mounted so as to intersect with the shaft portion 10a. The split pin 12 is provided on the rear side of the cap 9 shown on the right side in FIG. It is arranged outside 92. Therefore, as shown in FIG. 2, the engagement confirmation pin 10 is attached to the plate 10 disposed in the rebar insertion hole 92.
b and the split pin 12 disposed outside the reinforcing bar insertion hole 92, the moving distance of the shaft portion 10a slidably fitted in the through hole 94 in the left-right direction in FIG. Shaft 10
The protruding amount of the base end 10e with respect to the cap 9 is variable so as to be slidable in the horizontal direction in FIG.

As shown in FIG. 2 or FIG. 5, the engagement check pin 10 has a predetermined length from the left end of FIG. 2 (rear end of FIG. 5) which is the front of the shaft 10a. Only L2 minutes,
A marking portion 10M is provided in such a manner that paint 13 is applied to an outer peripheral portion of the shaft portion 10a.
When the plate 10b is pressed against the end surface 61c of the beam main reinforcement 61 in a state where the plate 10b is screwed into the main fitting 61 by a predetermined fitting length L4, as shown in FIG.
End of the through hole 94 projects outward of the cap 9 shown on the left side of FIG. The engagement confirmation pin 10
When the beam main bar 61 is not inserted into the reinforcing bar insertion hole 92 of the cap 9 (the state shown in FIG. 4), the marking portion 10M is substantially moved through the spring force of the spring washer 11 described below. Most of the cotter pins 12 are disposed in the rebar insertion holes 92 and are retracted here until the split pins 12 abut on the right side surface of the cap 9 in FIG.

Further, as shown in FIG. 2, the cap 9 is disposed between the plate 10b of the engagement confirmation pin 10 and the bottom 92a of the reinforcing screw hole 92 so as to be expandable and contractible in the left-right direction of FIG. The spring washer 11, which is an elastic body,
The spring washer 11 is fitted in the shaft portion 10a of the engagement confirming pin 10, and is housed in the rebar threaded hole 92 in such a manner that the spring washer 11 can press the end face 61c shown at the right end of the main beam 61 in FIG. It is arranged and constitutes the rebar pressing means 8. Spring washer 11 constituting rebar pressing means 8
When no force is applied to the spring washer 11, that is, when the spring washer 11 is not restrained by any member, it assumes an extended state as shown in FIG. 4, and from this state, as shown in FIG. FIG. 2 of the spring washer 11
Left and right ends of the beam main bar 61 are shown in FIG.
2 is contracted in the left-right direction in FIG. 2 by being restrained by the right end face and the bottom 92a of the reinforcing screw hole 92. In this state, the right main end of the beam main reinforcing bar 61 through the contact portion 10c of the plate 10b. The end face 61c shown on the side can be pressed in the direction of arrow A.

Since the column / beam joint structure 1 and the fixing member 7 have the above-described configurations, when constructing the column / beam structure 1, first, the concrete The pillar main reinforcement 51 and the column hoop reinforcement 52 are arranged in a formwork for placing the concrete, and concrete is poured, for example, to the position shown in height LV1 in FIG. At this time, the column main bar 51 has its upper end protrudingly arranged to a position above the height LV1. In this way, the pillar 2 was cast and constructed to the height LV1 in FIG.
Through the column main bar 51 projecting above the height LV1, reinforcement and formwork work for the column 2 to be further connected to the column 2 just constructed are performed. Beam main bar 61 for beam 3 connected to beam connection 2a
With their respective rebar shafts oriented in the horizontal direction in FIG.
The end portion 61a is temporarily fixed and fixed to the pillar main bar 51 or a member constituting the mold such as a separator in such a manner that the end 61a is arranged in the mold for the pillar 2.

When the end 61a of the beam main bar 61 is embedded in the column 2, first, the fixing member 7 in the state shown in FIG. 4 in which the beam main bar 61 is not yet screwed into the reinforcing bar screw hole 92.
Then, the end 61 a of the beam main reinforcing bar 61 is engaged with the reinforcing bar screwing hole 92 by screwing. As shown in FIG. 4, the fixing member 7 not engaged with the beam main bar 61 is
However, the plate 10b is urged in the direction of the arrow A by the restoring force of the spring of the spring washer 11, so that almost all of the marking portion 10M has a reinforcing screw hole 92.
The cotter pin 12 is retracted here until the cotter pin 12 contacts the right side surface of the cap 9 in FIG. In this state, the end 61a of the main beam 61 is screwed into the screw hole 92 through the opening 92b, and the screw 61b is screwed into the screw groove 93 from the end face 61c shown on the right side in FIG. And screw it in. Then, the main beam 61 is screwed into the screw hole 92 for the predetermined fitting length L4 shown in FIG. 2 in such a manner that the end face 61c is moved from the left side to the right side in FIG. Then, the beam main bar 61 screwed into the reinforcing bar screw hole 92 fits around the shaft portion 10a while the end face 61c moves in the screw hole 92 from left to right in FIG. Against the spring force of the mounted spring washer 11,
The contact portion 10c of the plate 10b of the engagement confirmation pin 10 is
Fig. 2 Pushing toward the right. As a result, the engagement confirmation pin 10 is pushed by the end face 61 c of the main beam 61 in a form in which the shaft portion 10 a slides along the through hole 94, and the entire engagement confirmation pin 10 is Figure 2
Move toward the right side. In this manner, with the shaft portion 10b sliding along the through hole 94, the engagement confirming pin 10 moves its base end 10e toward the right side in FIG. By this operation, the marking portion 10M provided on the shaft portion 10b moves with respect to the through-hole 94, and finally, the beam main reinforcing bar 61 is inserted into the reinforcing-bar screw-in hole 9.
2, the marking portion 10M is disposed outside the cap 9 such that the right end portion of FIG. 2 protrudes from the through-hole 94.
In this state, that is, the marking portion 92
Is exposed, the operator can confirm that the main beam 61 has been fitted into the reinforcing-bar screw-in hole 92 and screwed in by the length L4.

By the way, when the main beam 61 is screwed into the reinforcing screw hole 92 of the cap 9 and screwed by the length L4, a screw groove 93 is formed on the outer periphery of the reinforcing screw hole 92.
The beam main bar 61 is easily screwed into the rebar screw hole 92 because the beam main bar 61 is formed with a sufficient margin so that the gap 15 can be formed between the beam bar 61 and the threaded bar 61b. The beam 9 and the cap 9 constituting the fixing body 7 are temporarily engaged. In this manner, in a state where the beam main reinforcing bar 61 is screwed into the reinforcing screw hole 92, the gap 1 is provided between the screw bar 61b and the screw groove 93.
Because of the formation of 5, the two 61 and 9 are relatively movable by the gap 15 minutes. However, as shown in FIG. 2, the main beam 61 is compressed between the plate 10 b and the bottom 92 a of the reinforcing screw hole 92 in the left-right direction in FIG. 2 by screwing the main beam 61. The end face 61c is pressed against the cap 9 by the urging force of the spring of the washer 11 toward the left side in FIG. Shape. As a result, as shown in FIG. 2, the beam main bar 61 is pressed in the axial direction of the beam main bar 61, and the side surface of the screw bar 61 b in the direction of arrow A in FIG. And the contact portion 60 is formed between them. Then, the screw stick 61 is attached to the cap 9 via the gap 15.
The cap 9 of the fixing body 7 is securely screwed and engaged with the end 61a of the beam main bar 61 without relative movement of b, that is, in a state where so-called rattling is prevented from occurring in the beam main bar 61. Therefore, the simple operation of screwing the end 61a of the main beam 61 into the screw hole 92 of the cap 9 simply and reliably, that is, the fitting length L4 is secured, and the rattle is prevented. Thus, the cap 9 can be screw-engaged with the main beam 61. In addition, even in this state, that is, in a state where concrete has not yet been cast in the formwork for the column 2 above the height LV1, the inspection work for confirming the reinforcement arrangement for the column 2 is performed at the same time. The fact that the marking portion 10M of the engagement confirmation pin 10 is exposed outside the cap 9 attached to the end portion 61a of each beam main reinforcement 61, that is, on the right side of the through hole 94 in FIG. By visually checking from the above, it is possible to easily inspect and confirm that the engaged mounting state between the main beam 61 and the cap 9 is complete.

As described above, the beam main reinforcement 61 with the cap 9 engaged and mounted is adjusted to the height LV shown in FIG.
When a predetermined number of pieces are temporarily fixed in the formwork for the column 2 above 1, the concrete is poured into the formwork.
Then, in the reinforced concrete constituting the pillar 2,
A predetermined number of beam main reinforcements 61 are embedded and mounted in a form in which the caps 9 are engaged with the ends 61a. In this state,
The beam 3 is constructed by connecting and arranging the beam hoop 62 in the formwork for the beam 3 and the beam main bar 61 that is arranged in series on the left side of FIG. Concrete to be cast. Then, the end portion 61a becomes the pillar 2
A pull-out stress is applied to the beam main bar 61 embedded and mounted in the direction of the arrow A in a form in which the weight of the beam 3 is applied. At this time, the beam main bar 61 not only depends on the adhesive force for the length embedded in the concrete constituting the column 2, but also the cap 9 attached to the end 61 a of the beam main bar 61 2, the flange 91 formed near the end of the cap 9 in the direction of the arrow A in FIG. 2 and having a diameter D2 larger than the outer diameter D1 of the main body is formed between the cap 9 and the plate to be pressed. In this manner, the concrete of the column 2 is pressed by the amount corresponding to the area of the flange portion 91 shown in FIG. . That is, the beam main reinforcing bar 61 and the cap 9 are screwed in such a manner that the contact portion 60 is formed between the side surface in the direction of arrow A in FIG. Due to the engagement, the beams 9 and 61 are united, and the weight of the beam 3 loaded on the beam main bar 61 is reduced by the weight so that the beam main bar 61 does not come out of the reinforcing bar screw hole 92 of the cap 9. Thus, the support 9 is securely supported and burdened on the cap 9 via the corresponding contact portion 60. Therefore, each beam main reinforcement 6
Reference numeral 1 can express a sufficient fixing force with respect to the weight of the beam 3 by reliably utilizing the pull-out resistance of the cap 9. Thus, the beam 3 is provided at the beam joint 2a of the column 2,
The beam 2 is integrally formed with the column 2 in such a manner as to be connected by a predetermined number of beam main bars 61 embedded and set in the column 2.

In the above-described embodiment, the engagement confirming pin 10 is fitted to the fixing body 7 attached to the end 61a of the beam main reinforcement 61, and the shaft 10b is slidably fitted to the through hole 94 of the cap 9. Although the example in which the cap 9 is fitted here is described in a mounted form, as shown in FIG. 6, the cap 9 of the fixing body 7 has a through-hole 94 simply formed on the right side of FIG. In some cases, the engagement confirmation pin 10 as shown in FIG. 5 may not be mounted at all. In this case, the cap 9 of the fixing body 7
Before attaching the end 61a of the main beam 61 to the beam, the spring washer 11 is inserted into the threaded hole 92 of the reinforcing bar prior to this. The main beam 61 is screwed into the screw hole 92 by a predetermined fitting length L4 by screwing the cap 9 around the end 61a a predetermined number of times.
The engagement state between 1 and the cap 9 is confirmed by visual inspection through the through hole 94. Of course, the fixing member 7 shown in FIG. 6 has a gap 15 between the screw groove 61 and the screw bar 61b of the beam main bar 61 screwed into the screw groove 93, similarly to the fixing member 7 shown in FIG. The end face 61c of the beam main bar 61 is pressed by the spring force of the spring washer 11 constituting the reinforcing bar pressing means 8 while the screw is easily screwed in the formed shape, so that the beam main bar 61 has its axis. It is securely screwed to the cap 9 in the form pressed in the direction,
Thus, the effect that the main beam 61 can reliably and uniformly develop the fixing strength can be obtained without any difference from the case of the embodiment shown in FIG. 2 described above. The rebar pressing means 8 provided on the cap 9 is not limited to the spring washer 11, and may press an end face of the rebar such as the end face 61 c of the beam main bar 61 screwed into the rebar screw hole 92 of the cap 9. Can be used, for example, the reinforcing screw hole 92 and the beam main bar end face 61c.
An elastic member such as rubber formed in a shape corresponding to the above shape may be used.

Further, as shown in FIG. 7, a headed bolt 17 may be used as the reinforcing bar pressing means 8 in place of the spring washer 11, as shown in FIG. That is, in the example shown in FIG. 7, in the cap 9, a screw 19 is screwed into a female screw in a through hole 94 provided so as to communicate the bottom 92a of the reinforcing screw hole 92 with the outside of the cap 9. In the through hole 94, a headed bolt 17 which is a bolt body as the rebar pressing means 8 is formed.
The screw 19 and the screw 17a of the headed bolt 17 are provided so as to be freely movable in the directions of arrows A and B so as to screw together.
Therefore, the headed bolt 17 is configured to be able to enter and retreat into the reinforcing-bar screw-in hole 92 by turning the head 17b around the screw 19 of the through hole 94 by turning the head 17b. Therefore, when attaching the cap 9 of the fixing member 7 to the beam main bar 61, the beam main bar 61 is screwed into the reinforcing bar screw hole 92 from the opening 92b side by a predetermined fitting length L4. The head bolt 17 is screwed from the outside of the cap 9 shown in the right side of FIG. Then, the tip 17c of the headed bolt 17 comes into contact with the end face 61c of the beam main bar 61 shown at the right end of FIG.
After the abutment with the end face 61c, the head 17b is further turned in the tightening direction of the screw 17a until a predetermined torque is generated in the headed bolt 17. Thereby, the tip 17c
7 presses the end face 61c of the beam main bar 61 in the direction of the arrow A in FIG. 7 to move the beam main bar 61 in the direction of the arrow A, and inserts the screw bar 61b formed on the outer periphery thereof into the reinforcing bar screw hole 92. By pressing the formed screw groove 93 against the side surface in the direction of the arrow A in FIG. 7 to form the contact portion 60, the threaded engagement between the main beam 61 and the cap 9 is ensured. Therefore, the head bolt 17 can easily press the beam main bar 61 by turning the head 17 b from the outside of the cap 9 after screwing the beam main bar 61 into the reinforcing bar screw hole 92 of the cap 9. . Therefore, before the main beam 61 and the cap 9 are screwed together, the spring washer 1
It is not necessary to accommodate the reinforcing bar pressing means such as 1 and the work of screwing the main beam 61 into the cap 9 and the operation of mounting and tightening the headed bolt 17, that is, the pressing operation of the main beam 61 are independent of each other. Because it can be advanced in the form of being made, the degree of freedom of construction is high. If the headed bolt 17 is screwed into the through hole 94 in this manner, the head 17b can be visually confirmed in a form exposed to the outside of the cap 9, so that the headed bolt 17 is forgotten to be mounted. It is prevented, and reliable construction is possible. Also, the through hole 94
The headed bolt 17, which is screwed into the main body 61 and presses the end 61c of the main beam 61, has a tip 17c in contact with the end face 61c. The position of the end face 61c can be confirmed by confirming that the protrusion L5 from the right side surface has a predetermined length. Thereby, it can be confirmed that the beam main reinforcement 61 and the cap 9 are screwed and engaged with a sufficient fitting length of the length L4 or more. Therefore,
The headed bolt 17 can also play a role of checking the engagement state of a reinforcing bar such as the beam main bar 61 screwed into the reinforcing bar screw hole 92. Note that the headed bolt 17 is attached to the cap 9
Before the main beam 61 is screwed into the screw hole 92 of the reinforcing bar, the main beam 61 is screwed into the through hole 94 to a certain depth in the through hole 94, and the main beam 61 is screwed by a predetermined length L4. Even if it is used in the form of tightening afterwards, the above-mentioned torque and head 1 generated when the headed bolt 17 is tightened.
Since the rise L5 of 7b can be confirmed from the outside of the cap 9, no inconvenience occurs.

Further, in the above-described embodiment, the case has been described where the end face 61c of the beam main reinforcing bar 61, which is a reinforcing thread screwed into the reinforcing threaded hole 92, is flat, but the end face 61c is as shown in FIG. Alternatively, it may be formed in a spherical shape. In the embodiment shown in FIG. 8, the bottom 92a of the cap 9 is formed in the shape of an elastic member having a small thickness in the left-right direction in FIG. The means 8 is constituted by a bottom portion 92a formed so as to be elastically deformable by the beam main bar 61 screwed into the reinforcing screw hole 92. Therefore, the fixing body 7 shown in FIG. 8 has a very simple structure, and the end face 61c of the beam main reinforcing bar 61 is formed by screwing the main reinforcing bar 61 into the screw hole 92 of the reinforcing bar without requiring any additional parts other than the cap 9.
8 presses the bottom 92a in the direction of arrow B in FIG. 8, and presses the end face 61c back in the direction of arrow A with the elasticity of the bottom 92a. By pressing the screw 93 against the left side surface in FIG. 8, the screw engagement state can be ensured without rattling. That is, the beam main reinforcing bar 61 is
After that, the end face 61c is pressed by some means, so that the work of engaging the main beam 61 with the cap 9 can be simply completed in one step. The cap 9 shown in FIG. 8 has a thin bottom portion 92a and a spherical end surface 61c of the beam main bar 61 that is screwed into the reinforcing screw hole 92. When the screw 61 is screwed in a predetermined fitting length L4, the spherical end face 61c can be easily visually confirmed through the through hole 94 formed through the thin bottom 92a. I can do it. Therefore, the cap 9 and the beam main bar 61
It is not necessary to use other means for confirming the screw fixing length.

In the above-described embodiment, an example has been described in which the cap 9 is formed with the through hole 94 so as to communicate the bottom 92a of the reinforcing screw hole 92 with the outside of the cap 9. In the present invention, when the reinforcing bar such as the beam main bar 61 is embedded and set in the concrete structure such as the column 2 using the fixing body 7, in order to obtain a reliable and uniform fixing strength, the reinforcing bar screw hole 92 is used. It is sufficient that the reinforcing bar pressing means 8 capable of pressing the end face 61c of the reinforcing bar such as the beam main bar 61 to be screwed can be provided in any of the caps 9. Therefore, the through hole 94 is not necessarily formed in the bottom 92a. No problem. That is, the cap 9 is provided with any rebar pressing means having a shape in which a rebar to be fixed, such as the beam main bar 61, can be screwed into a rebar threaded portion such as the rebar threaded hole 92, and which can press the rebar. 8 may be formed in any shape as long as it can be provided. Therefore, the cap 9 is, for example, as shown in FIG.
The taper may be formed on both the left and right sides of the flange portion 91 in FIG. 9, whereby the fitting length L4 can be further increased, and of course, it may have another shape. Absent. Further, in the above-described embodiment, an example has been described in which the fixing body 7, which is the reinforcing bar fixing jig according to the present invention, is used for the end portion 61 a of the beam main bar 61 and is embedded and set in the column 2. The reinforcing bar to be used is beam main bar 61
However, the present invention is not limited to this. That is, in order to fix the reinforcing steel other than the beam main reinforcing bar 61 in the concrete structure other than the column 2, there is no use of the reinforcing steel fixing jig according to the present invention. Further, in the embodiment, the screw groove 93 formed in the reinforcing screw hole 92 of the cap 9 is formed in a female screw shape corresponding to the screw bar 61b of the beam main bar 61 made of the deformed screw bar. The reinforcing bar to be fixed is not limited to the beam main bar 61, that is, the screw formed in the reinforcing screw hole 92 is arbitrarily formed in a shape corresponding to the screw of the reinforcing bar to be fixed. It is.

[0023]

As described above, according to the present invention, the cap 9 which can be buried in a concrete structure such as the pillar 2 or the like.
Etc., and the main body is provided with a screw
Beam main bar 6 to be fixed, in which male screw such as b is formed
A threaded portion such as a screw hole 92 into which a reinforcing bar such as No. 1 is screwed has a screw groove 93 which can be screwed with a male screw of the reinforcing bar therein.
And a female screw pressing means 8 is provided on the main body, and the end face 61 of the reinforcing steel screwed into the screwed portion is provided.
c is provided in such a manner that it can be pressed, the rebar pressing means 8 presses the end face 61c of the rebar screwed into the threaded portion, whereby the rebar is pressed along its axial direction, and The main body can be buried in the concrete structure with the male screw pressed against one side of the female screw in the threaded portion to form the contact portion 60. That is,
By pressing the end face 61c of the rebar screwed into the threaded portion by the rebar pressing means 8 to form the contact portion 60, the male screw of the rebar moves relatively to the female screw of the threaded portion. The rebar and the main body are securely screwed and integrated without so-called rattling. Therefore, if the ends of the reinforcing bars are embedded in the concrete structure as in the case where the beam bars are fixed to the pillar using the reinforcing bar fixing jig according to the present invention such as the fixing body 7, the reinforcing bars are embedded and set in the concrete structure. There is no fear that the rebar will come off from the set main body due to rattling between the male screw of the rebar and the internal thread of the threaded portion, and the load such as the weight of the beam loaded on the rebar is transmitted to the main body without waste. Can be done. As a result, a sufficient pulling resistance is developed in the main body, and a reliable fixing strength can be obtained for each reinforcing bar. And, since the screwing engagement between the main body and the rebar is completed by a simple operation of simply screwing the rebar into the screwed portion, the construction is extremely simple, and therefore, the reliable construction of each rebar is achieved. , It is possible to always obtain a uniform fixing strength. Therefore, there is no danger that a reinforcing bar whose actual fixing strength becomes insufficient due to a variation in the construction state is generated. The rebar threaded into the threaded portion is shaped such that the end face of the rebar is pressed by the rebar pressing means after the screwing operation, and the male screw is pressed in the rebar axial direction toward the female screw of the threaded portion. Before the screwing operation, a play of the screw may be formed between the male screw and the female screw so as to form the gap 15 later by the screwing. The main body and the rebar can be screwed smoothly.

When the rebar pressing means 8 is constituted by the rebar fixing jig according to the present invention so as to be formed of an elastic body such as a spring washer 11 housed in the screwed portion, the elastic body is provided in the screwed portion. In this case, the end face of the rebar can be pressed by the elastic force held by the elastic body itself. Accordingly, since it is not necessary to apply an external force via the outside of the main body to press the reinforcing bar, the reinforcing bar and the main body can be easily screwed and engaged with less work. Therefore, it is possible to reduce the time required for fixing work for each reinforcing bar. Also, since the pressing force of the reinforcing bar is determined by the elastic force of the elastic body, the pressing force applied to the reinforcing bar does not change depending on the construction state, and the main body and the reinforcing bar can always be engaged in a uniform state. Therefore, there is no concern that the fixing force of the rebar to be fixed varies, and a more reliable rebar structure can be obtained.

Further, a through hole 94 is provided in the main body so that the bottom portion 92a of the screwed portion communicates with the outside of the main body, and a reinforcing bar engagement confirming member such as an engagement confirmation pin 10 is provided in the through hole 94. A tip portion such as a base end 10e is slidably provided along the through hole 94 so as to protrude from the main body, and an abutting portion 10c is provided on the threaded portion side of the rebar engagement confirmation member. When the reinforcing bar fixing jig according to the present invention is configured by providing a reinforcing bar contact portion such as the above, the end face of the reinforcing bar screwed into the threaded portion abuts against the reinforcing bar abutting portion of the engagement confirming member and pushes it. The distal end portion can protrude outward from the main body so that the matching member slides along the through hole. Therefore, by visually confirming the protrusion of the tip of the reinforcing bar engagement confirmation member,
It is possible to detect that the end face of the reinforcing bar screwed into the screwed portion comes into contact with the reinforcing bar contact portion and presses it. Therefore, when screwing the rebar and the main body through the screwed portion, the screwing amount of the rebar such as the fitting length L4 can be easily inspected and confirmed from the outer side of the main body. That is, it is possible to easily and easily confirm the screwing amount of the reinforcing bar by using the reinforcing bar engagement confirming member to confirm that the engagement state between the main body and the reinforcing bar is perfect for each of the reinforcing bars. Therefore, by doing this, it is possible to further assure and homogenize the work of fixing the reinforcing bars, and to improve the quality of the concrete structure using the reinforcing bars. Furthermore, if the reinforcing bar engagement confirming member is provided with any means for detecting the protruding amount of the tip such as the marking portion 10M for confirming the protruding amount of the tip, the main body can be connected to the end 61a of the reinforcing bar.
During the work of screwing and engaging the end of the work, etc., and even after the work is completed, the engagement state between the main body and the rebar can be more easily checked and inspected. There is no concern that work on site will increase.

Further, a through hole 94 is provided in the main body so that the bottom of the screwed portion communicates with the outside of the main body, and a bolt body such as a headed bolt 17 as the rebar pressing means 8 is provided in the through hole. When the rebar fixing jig according to the present invention is configured by being screwed into and out of the threaded portion so as to be able to enter and retract, the bolt body enters the threaded portion from the outside of the main body through a through hole. Thus, the end face of the reinforcing bar can be pressed. Therefore, before attaching the main body to the rebar, it is not necessary to previously house the rebar pressing means in a threaded portion or the like. Since the end face of the rebar can be pressed arbitrarily in the form of being screwed into, the engagement work between the rebar and the main body and the pressing work on the end face of the rebar can be advanced separately in a form independent of each other, The degree of freedom of construction increases.
Further, the bolt body is provided with an operation unit such as a head 17b for screwing the bolt body to the through-hole 94 in a form capable of pressing the end surface of the reinforcing bar at the tip end side, and is disposed outside the main body. By controlling the torque applied to the bolt outside the main body, the amount of rebar pressing of the bolt body can be confirmed, and the position of the end face of the rebar can be determined by detecting the amount of protrusion of the operation unit with respect to the main body. Since the detection and confirmation can be performed, the engagement state between the main body and the reinforcing bar can be confirmed and inspected by using the bolt body instead of the engagement confirmation member described above.

Further, the rebar pressing means is characterized in that the bottom of the screwed portion is formed so as to be elastically deformable by a reinforcing bar screwed into the screwed portion. The bottom part can press the rebar in a form in which it is pressed against the end face of the rebar and elastically deforms.
Therefore, it is not necessary to store or mount the rebar pressing means in the main body as a member other than the main body, so that the number of components constituting the rebar fixing jig can be reduced and the configuration can be simplified. Further, the above-described engagement work between the main body and the rebar in the form of pressing the end face of the rebar after the rebar is screwed into the screwed portion is performed by one step of screwing the rebar into the screwed portion. The operation can be simplified, and the operation time can be shortened. Therefore, the construction efficiency is improved while the rebar is securely fixed.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a column / beam joint structure in which a reinforcing bar is embedded using an embodiment of a reinforcing bar fixing jig according to the present invention.

FIG. 2 is an enlarged view showing details of a reinforcing bar fixing jig shown in FIG. 1;

FIG. 3 is a view taken in the direction of the arrow III in FIG. 2;

FIG. 4 is a cross-sectional side view showing a state in which a reinforcing bar is not fitted in the reinforcing bar fixing jig shown in FIG. 2;

FIG. 5 is a perspective view showing an engagement confirming pin portion in the rebar fixing jig shown in FIG. 2;

FIG. 6 is a view showing another embodiment of the reinforcing bar fixing jig according to the present invention.

FIG. 7 is a view showing still another embodiment of the reinforcing bar fixing jig according to the present invention.

FIG. 8 is a view showing still another embodiment of the reinforcing bar fixing jig according to the present invention.

FIG. 9 is a view showing still another embodiment of the reinforcing bar fixing jig according to the present invention.

FIG. 10 is a diagram illustrating an example of a method of fixing a reinforcing bar that has been conventionally performed.

FIG. 11 is a diagram showing an example of a method of fixing a reinforcing bar which has been conventionally performed.

FIG. 12 is a diagram illustrating an example of a method of fixing a reinforcing bar that has been conventionally performed.

[Explanation of symbols]

 2 Concrete structure (column) 61 Reinforcing bar (beam main bar) 61b Male screw (screw thread) 61c End face 7 Reinforcing bar fixing jig (fixing body) 8 Reinforcing bar pressing means 9 Main body (Cap) 92 Threaded portion (rebar threaded hole) 92a Bottom 93 Female screw (screw groove) 94 Through hole 10 Engagement confirmation member (engagement confirmation pin) 10c Contact part 10e: tip part (base end) 11: elastic body (spring washer) 17: bolt body (bolt with head)

Claims (5)

(57) [Claims] The present invention has a main body which can be embedded in a concrete structure, and a threaded portion into which a reinforcing bar having a male screw formed on an outer periphery thereof is screwed. A rebar fixing means provided with a female screw which can be screwed with a male screw of the rebar, and a rebar pressing means provided on the main body in a form capable of pressing an end face of a rebar screwed into the screwed portion. jig. 2. The rebar fixing jig according to claim 1, wherein said rebar pressing means is made of an elastic body accommodated in said screwed portion. 3. A through-hole is provided in the main body so as to communicate the bottom of the screwed portion with the outside of the main body. The rebar fixing jig according to claim 1, wherein the rebar fixing jig is provided so as to be slidable along the through hole so as to protrude therefrom, and a rebar abutment portion is provided on the threaded portion side of the rebar engagement confirmation member. 4. A through hole is provided in said main body so that a bottom of said threaded portion communicates with the outside of said main body, and a bolt body as a reinforcing bar pressing means is provided in said through hole with respect to said threaded portion. The rebar fixing jig according to claim 1, wherein the rebar fixing jig is configured to be screwed so as to enter and retract. 5. The rebar fixing jig according to claim 1, wherein said rebar pressing means is formed such that a bottom portion of said threaded portion is elastically deformable by a rebar threaded into said threaded portion.