JPH06193269A - Reinforcement anchoring jig - Google Patents

Abstract

PURPOSE:To provide an easy installation method and secure an anchoring strength when a reinforcement is anchored in concrete. CONSTITUTION:A spring washer 11 is stored in a screw hole 92 of a cap 9 in which a screw groove 93 is formed, and a beam main reinforcement 61 around the periphery of which a screw protrusion 61b is formed is screwed into it. The beam main reinforcement 61 is pushed along the axial direction because the spring washer 11 presses the end 61c of the beam main reinforcement 61, and a contact section 60 is formed on the screw protrusion 61b with the screw groove 93 to obtain a secure integral engagement of the cap 9 with the beam main reinforcement 61. Moreover when an engagement confirmation pin 10 is provided slidably along a through hole 94, a close-fit length L4 can be confirmed because a base end 10e is protruded outward from the cap 9 through a contact section 10c to expose a marking section 10M.

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 an example of a conventional reinforcing bar fixing method. Conventionally, in the case of fixing the end portion of the reinforcing bar in concrete as in the case of fixing the beam reinforcing member to the column structure in the reinforced concrete structure, as shown in FIGS. 10 to 12, the end portion of the reinforcing bar 33 to be fixed is shown. By bending it in a U shape as shown in FIG. 10 or by bending it in an L shape as shown in FIG. The pull-out strength of is secured. However, bending each end of the reinforcing bar 33 in this way is complicated because it takes time and labor for processing the reinforcing bar 33, and at the joint portion of 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 bar arrangement becomes complicated and the construction is difficult. Therefore, as a method for omitting such bending work of the reinforcing bar, as shown in FIG. 12, a reinforcing bar 34 having a thread cut on its entire length or at least the end is used, and nuts 35, 35, etc. are used for this. An appropriate reaction force plate 36 is mounted, and the repulsion plate 36 is used to increase the pullout resistance and to fix the rebar 34, whose end portion is not bent, as a straight reinforcement in concrete. There is also a method.

[0003]

However, in order to provide the reinforcing bar 34 having the straight reinforcement as described above 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 by this. Therefore, in order to develop a sufficient pull-out resistance in the reinforcing bar 34, it is necessary to increase the width W1 of the reaction force plate 36 or increase the length L3 of the fixing portion formed by the nuts 35, 35 and the reaction force plate 36. However, no matter which method is used, the column main bar 51
This is not preferable because there is a concern that interference may occur with In addition, the nut 35 and the rebar 3 of the reaction plate 36
The mounting to the No. 4 is performed at the construction site, but since it is a complicated work to sandwich the reaction force plate 36 between the two nuts 35, 35, the finish varies greatly depending on the construction state. . That is, if the two nuts 35, 35 are not sufficiently tightened to each other, there is a risk that a reinforcing bar may be generated in which the actual fixing strength becomes insufficient. Therefore, in view of the above circumstances, the present invention provides a reinforcing bar fixing jig capable of obtaining a uniform and reliable fixing strength even when the end of the reinforcing bar is embedded in concrete, while being simple in construction. To do.

[0004]

That is, the present invention has a body (9) which can be embedded in a concrete structure (2),
The main body (9) is provided with a threaded portion (92) into which a rebar (61) to be fixed, which has a male screw (61b) formed on its outer periphery, is screwed, and the rebar (61) is internally provided with the threaded part (92). Reinforcing bar (61) which is provided in the form of forming a female screw (93) that can be screwed into the male screw (61b), and which has a reinforcing bar pressing means (8) in the main body (9) and is screwed into the screwing part (92) The end face (61c) is provided so as to be able to be pressed. Further, the reinforcing bar pressing means (8) is provided with the threaded portion (92).
The reinforcing bar fixing jig (7) is constituted by the elastic body (11) housed inside. Also, the main body (9)
A through hole (94) is provided in the bottom of the threaded portion (92) and the outside of the main body (9) to communicate with each other, and a reinforcing bar engagement confirmation member (10) is provided in the through hole (94).
Is provided slidably along the through hole (94) in such a manner that its tip (10e) can be projected to the main body (9), and the rebar engagement confirmation member (10) is screwed in. The reinforcing bar abutting portion (10c) is provided on the side of the portion (92) to form the reinforcing bar fixing jig (7). Further, a through hole (94) is formed in the body (9), and a bottom portion (92) of the screwed portion (92) is formed.
a) is provided so as to communicate with the outside of the main body (9), and a bolt body (17) as a reinforcing bar pressing means (8) is inserted into the through hole (94) with respect to the threaded portion (92). The rebar fixing jig (7) is constructed by screwing backward. Further, the reinforcing bar pressing means (8) is provided with the threaded portion (9).
A reinforcing bar fixing jig (7) is characterized in that the bottom part (2a) of 2) is elastically deformable by a reinforcing bar (61) screwed into the screwing part (92). The numbers in parentheses () indicate the corresponding elements in the drawings for the sake of convenience, and therefore the present description is not limited to the description in the drawings. The same applies to the following action columns.

[0005]

With the above structure, the reinforcing bar pressing means (8) presses the end face of the reinforcing bar (61) screwed into the screwed portion (92), so that the reinforcing bar (61) is pressed along its axial direction. Then, the male screw (61b) of the reinforcing bar (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 ) Acts to be embedded in the concrete structure (2). Further, the elastic body (11) has a threaded portion (9
In 2), it acts to press the end face (61c) of the reinforcing bar (61) by the elastic force possessed by the elastic body (11) itself. Further, the end face (61c) of the reinforcing bar (61) screwed into the screw-in portion (92) has an engagement confirmation member (1).
0) abutting against the reinforcing bar contact portion (10c) and pushing it, the engagement confirmation member (10) slides along the through hole,
The tip portion (10e) acts so as to project to the outside of the main body (9). Also, the bolt body (17) is the main body (9).
From the outside of the through-hole (94) through the screw-in part (9
It acts so as to press the end face (61c) of the reinforcing bar (61) in a form of entering 2). Further, the bottom portion (92a) is pressed by the end surface (61c) of the reinforcing bar (61) and elastically deforms to press the reinforcing bar (61).

[0006]

FIG. 1 is a diagram showing an example of a column-beam joint structure in which reinforcing bars are embedded by using an example of a reinforcing bar fixing jig according to the present invention, and FIG. 2 is a detail of the reinforcing bar fixing jig shown in FIG. 2 is an enlarged view of FIG. 3, FIG. 3 is an arrow view of FIG. 2, FIG. 4 is a cross-sectional side view showing a state in which the reinforcing bars are not fitted in the reinforcing bar fixing jig shown in FIG. 2, and FIG. 5 is a reinforcing bar fixing shown in FIG. FIG. 6 is a perspective view showing an engagement confirmation pin portion in the jig, FIG. 6 is a view showing another embodiment of the reinforcing bar fixing jig according to the present invention, and FIG. 7 is a still another example of the reinforcing bar fixing jig according to the present invention. FIG. 8 is a diagram showing still another embodiment of the reinforcing bar fixing jig according to the present invention, and FIG. 9 is a diagram showing still another example of the reinforcing bar fixing jig according to the present invention.

As shown in FIG. 1, the column-beam joint structure 1 has the following structure.
It 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 that extends in the vertical direction, which is the extension direction of the column 2.
However, a predetermined number of embedded bars are arranged in the cross section of the pillar 2. Further, in the pillar 2, a plurality of pillar hoop bars 52 made of deformed steel bars or the like that are bent in the horizontal direction so as to surround the pillar main bars 51 are formed in a plurality at a substantially predetermined pitch in the vertical direction in FIG. The pillar hoop muscles 52 are connected and integrated with the pillar main muscles 51 by welding or the like.

As shown in FIG. 1, a beam connecting portion 2a is provided at a predetermined position near the center of the column 2 in the vertical direction in FIG. 1, and the beam connecting portion 2a is equivalent to the column 2 in the beam connecting portion 2a. 1. A beam 3 made of reinforced concrete is suspended between the column 2 and a column arranged in a part (not shown) on the left side of FIG. 1 in a form extending from the beam connection portion 2a in the horizontal direction shown on the left side of FIG. And is connected and arranged here. Each of the beams 3 is made of a deformed screw bar steel bar or the like that extends in the horizontal direction that is the extension direction of the beam 3, and the like.
Beam main bar 61 which is a reinforcing bar to be anchored in the pillar 2 by
A predetermined number of bars are embedded in the transverse section of the beam 3, and each of the deformed steel bars is bent in the beam 3 in a direction intersecting the plane of FIG. 1 so as to surround the beam main bar 61. A plurality of beam hoop reinforcements 62 made of, for example, are embedded and connected to the beam main reinforcement 61 by welding or the like in a horizontal direction at a substantially predetermined pitch in FIG.

As shown in FIG. 2, the beam main bar 61 is provided with a threaded fastener 61b having a male screw formed on the outer periphery thereof in a spiral shape over the entire length of the column main bar 61 shown in the left-right direction in FIG. The beam main bars 61 are continuously formed in a projecting form, and the end portions 61a of the beam main bars 61 shown in the right end of FIG. 1 are arranged in the vicinity of the right end of FIG. It is embedded and set in the reinforced concrete that constitutes the. Further, the beam main bar 61 has the fixing member 7 at its end portion 61a.
1 and the screw groove 93 (shown in FIG. 2) formed in the cap 9 of the fixing body 7 are shown in FIG.
As shown in FIG. 5, the threaded portion is screwed by a predetermined fitting length L4 so as to be mounted here in a shape that maintains a predetermined fixing strength, and the beam main bar 61 is attached to the cap 9 of the fixing body 7.
By being embedded in the pillar 2, the pullout resistance from the pillar 2 is increased.

That is, as shown in FIG. 2 or FIG. 3, the fixing body 7 has a cap 9 which is a main body of a shape which is embedded in a pillar 2 which is a concrete structure.
The outer diameter D1 is larger than the outer diameter of the beam main bar 61 and is formed into a hat shape from cast iron or steel. As shown in FIG. 2, inside the cap 9, a reinforcing bar screw-in hole 92 into which a beam main bar 61, which is a reinforcing bar to be fixed, is screwed is opened in the left side of FIG. 2, that is, the reinforcing bar screw. The beam main bar 61 is formed in a hollow hole shape having a predetermined depth L1 so as to be screwed into the reinforcing bar screw hole 92 through an opening 92b which is the left side portion of the hole 92 in FIG. Inside the reinforcing bar screw-in 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 the shape of a female screw so that it can be screwed with the screw 1b.
With a sufficient margin with respect to b (that is, in the form that the gap 15 can be formed between the screw bushing 61b and the screw groove 93 as shown in FIG. 2), it can be screwed. Further, at the left end portion of the cap 9 in FIG.
Outer diameter D of the body of the cap 9 other than the flange 91
The outer diameter D2 is larger than 1 and is formed into a substantially disc shape. Further, a through hole 94 having a predetermined diameter D3 is formed at the right end portion of the cap 9 in FIG. 2 so that the bottom portion 92a of the reinforcing bar screw-in hole 92 is communicated to the right side in FIG. In the through hole 94, an engagement confirmation pin 10 for confirming a screwed state of the reinforcing bar screwed into the reinforcing bar screwing hole 92 is formed in the through hole 94.
2A which is a tip portion of the through hole 94 fitted in the through hole 94
The base end 10e shown at the right end is slidably provided along the through hole 94 so that the base end 10e can be projected to the right side in FIG.

That is, as shown in FIG. 5, the engagement confirmation pin 10 has a shaft portion 10a formed in a round shaft shape such that its outer diameter D5 is slightly smaller than the diameter D3 of the through hole 94. Therefore, on the back side (left side in FIG. 2) of the shaft portion 10a in FIG.
A disc-shaped plate 10b having a diameter D4 larger than the diameter D3 of the through hole 94 is formed by welding or the like on the shaft portion 10a.
It is attached here in a form that is integrated with. Plate 10
In FIG. 5b, there is a reinforcing bar contact portion which is in contact with the flat end surface 61c shown on the right end side of FIG. 2 of the beam main bar 61 on the back side of the plane of FIG. Contact part 10c
Is formed into a substantially circular shape, that is, the reinforcing bar screw-in hole 92
As shown in FIG. 2, the engagement confirmation pin 10 of the fixing body 7 in the state where the beam main bar 61 is screwed into and embedded in the column 2 has the plate 10b in the reinforcing bar screwed hole 92 as shown in FIG.
The abutting portion 10c is in contact with the end surface 61c of the main beam 61 of the beam.

As shown in FIG. 2, the engagement confirmation pin 10 has a base end 10e shown on the right end side of the shaft portion 10a in FIG.
However, in the embodiment, it is always projected to the outside shown in the right side of FIG. 2 of the cap 9 through the through hole 94, and the engagement confirmation pin 10 includes the vicinity of the base end 10e of the shaft portion 10a. A circular hole 10d is formed in a direction intersecting the axial direction of the shaft portion 10a. The round hole 10d has 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 located on the rear side of the cap 9 shown on the right side of FIG. It is arranged outside 92. Therefore, as shown in FIG. 2, the engagement confirmation pin 10 has the plate 10 arranged in the rebar insertion hole 92.
b and the split pin 12 arranged outside the reinforcing bar insertion hole 92, the shaft 10a slidably fitted in the through hole 94 is limited in the left-right direction moving distance in FIG. Shaft 10
The protrusion amount of the base end 10e with respect to the cap 9 is variable in such a manner as to be slidable in the left-right direction in FIG.

As shown in FIG. 2 or 5, the engagement confirmation pin 10 has a predetermined length from the left end of FIG. 2 (the end on the back side of the paper of FIG. 5) which is the front of the shaft portion 10a. Only L2 minutes,
A marking portion 10M is provided such that the paint 13 is applied to the outer peripheral portion of the shaft portion 10a, and the engagement confirmation pin 10 includes a beam main bar 61 and a reinforcing bar screw-in hole 94 of the cap 9.
As shown in FIG. 2, when the plate 10b is pushed onto the end face 61c of the beam main bar 61 in a state in which the plate 10b is screwed by a predetermined fitting length L4, the marking portion 10M
2 has a state in which its end portion projects to the outside of the cap 9 shown on the left side in FIG. 2 of the through hole 94. The engagement confirmation pin 10
When the main beam reinforcement 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 omitted through the spring force of the spring washer 11 described below. Most of them are arranged in the reinforcing bar insertion holes 92, and are kept pulled in here until the split pin 12 contacts the right side surface of the cap 9 in FIG.

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

Since the pillar / beam joint structure 1 and the fixing member 7 have the above-mentioned structure, when the pillar / beam structure 1 is constructed, first, the concrete forming the pillar 2 is constructed. A column main bar 51 and a column hoop bar 52 are arranged in a form for placing, and concrete is poured to a position shown in height LV1 in FIG. 1, for example. At this time, the column main bar 51 is arranged such that the upper end portion thereof projects above the height LV1. In this way, when the pillars 2 have been installed and constructed up to the height LV1 in Fig. 1,
Through the column main bar 51 projecting upward from the height LV1, the bar 2 and the frame work for the column 2 to be further joined to the upper side of the now constructed column 2 are performed, and at the same time, the column 2 Beam main bar 61 for the beam 3 connected to the beam connecting portion 2a
The direction of each rebar shaft body in the left-right direction of Fig. 1,
The end portion 61a is temporarily fixed to the pillar main bar 51 or a member such as a separator that constitutes the mold with the end 61a being arranged in the mold for the pillar 2.

When the end portion 61a of the beam main bar 61 is embedded in the pillar 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-in hole 92.
Then, the end portion 61a of the beam main bar 61 is engaged with the reinforcing bar screw-in hole 92 by screwing. As shown in FIG. 4, the fixing member 7 in the state where it is not engaged with the main beam 61 of the beam has the engagement confirmation pin 10
However, since the plate 10b is biased in the direction of arrow A through the restoring force of the spring of the spring washer 11, almost all of the marking portion 10M is rebar threaded hole 92.
The cotter pin 12 is pulled in here until it comes into contact with the right side surface of the cap 9 shown in FIG. Therefore, from this state, the end portion 61a of the beam main bar 61 is screwed into the rebar threaded hole 92 through the opening portion 92b, and the screw groove 61b is screwed into the thread groove 93 from the end surface 61c side shown on the right side of FIG. Screw in. Then, the beam main bar 61 is screwed into the reinforcing bar screw-in hole 92 by a predetermined fitting length L4 shown in FIG. 2 in a form of moving the end face 61c from the left side to the right side in FIG. 2 with respect to the cap 9. Then, the beam main bar 61 screwed into the rebar screw-in hole 92 is fitted around the shaft portion 10a while the end face 61c moves in the screw-in hole 92 from the left side to the right side 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
It will be pushed to the right in Fig. 2. As a result, the engagement confirmation pin 10 is pushed by the end face 61c of the beam main bar 61 with the shaft portion 10a sliding along the through hole 94, and the engagement confirmation pin 10 as a whole is against the cap 9. Figure 2
Move to the right. In this way, the base end 10e of the engagement confirmation pin 10 moves toward the right side in FIG. 2 with respect to the cap 9 in such a manner that the shaft portion 10b slides along the through hole 94. 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 bar 61 is changed to the reinforcing bar screwed hole 9.
When the marking portion 10M is screwed in for a fitting length L4 of 2, the marking portion 10M is arranged outside the cap 9 such that the right end portion of FIG. 2 projects from the through hole 94.
In this state, that is, on the outside of the cap 9, the marking portion 92
With the exposed state, the operator can confirm that the beam main bar 61 is fitted into the reinforcing bar screw-in hole 92 and screwed by the length L4.

By the way, when the beam main bar 61 is fitted into the reinforcing bar screw-in hole 92 of the cap 9 and screwed in by the length L4, the thread groove 93 is formed on the outer periphery of the reinforcing bar screw-in hole 92.
Since the gap 15 can be formed between the beam main bar 61 and the threaded fastener 61b with a sufficient margin, the beam main bar 61 is easily screwed into the reinforcing bar screw-in hole 92. The beam main bar 61 and the cap 9 forming the fixing body 7 are engaged with each other. As described above, in the state where the beam main bar 61 is screwed into the reinforcing bar screw-in hole 92, a gap 1 is formed between the screw bush 61b and the screw groove 93.
Since 5 is formed, both 61 and 9 are relatively movable by the gap 15. However, as shown in FIG. 2, the beam main bar 61 is a spring that is contracted in the left-right direction in FIG. 2 between the plate 10b and the bottom portion 92a of the reinforcing bar screw-in hole 92 by screwing the beam main bar 61. The end face 61c of the washer 11 is pressed by the contact portion 10c of the engagement confirmation pin 10 by the biasing force of the spring of the washer 11, and is pressed relatively to the cap 9 toward the left side in FIG. It becomes a 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 is located on the side surface of the screw fastener 61b in the direction of arrow A in FIG. The contact portion 60 is formed between the contact portion 60 and. Then, the screw fastener 61 is attached to the cap 9 through the gap 15.
The cap 9 of the fixing body 7 is securely screwed to the end portion 61a of the beam main bar 61 without the relative movement of b, that is, in the state where the so-called rattling of the beam main bar 61 is prevented. Therefore, by a simple operation of simply screwing the end portion 61a of the beam main bar 61 into the screw hole 92 of the cap 9, the fitting length L4 is ensured easily and reliably, and rattling is prevented. Then, the cap 9 can be screwed and engaged with the beam main bar 61. Even in this state, that is, in a state in which concrete has not been placed in the formwork for the pillar 2 above the height LV1, the inspection work for confirming the bar arrangement for the pillar 2 is performed at the same time. , The outer side of the cap 9 attached to the end 61a of each beam main bar 61, that is, the marking portion 10M of the engagement confirmation pin 10 is exposed on the right side of the through hole 94 in FIG. By visually confirming from the above, it is possible to easily inspect and confirm that the engagement mounting state of the main beam reinforcement 61 and the cap 9 is complete.

As described above, the beam main reinforcement 61 with the cap 9 engaged and attached thereto has the height LV shown in FIG.
When a predetermined number of columns are temporarily fixed in the formwork for the columns 2 above 1, concrete is poured into the formwork.
Then, in the reinforced concrete forming the pillar 2,
A predetermined number of beam main reinforcements 61 are embedded and attached in a form in which the cap 9 is engaged and attached to the end portions 61a thereof. In this state,
The beam 3 is constructed after connecting and arranging the beam hoop reinforcement 62 in the form for the beam 3 and the beam main reinforcement 61 arranged in series on the left side of FIG. Place concrete to do so. Then, the end portion 61a has the pillar 2
The pull-out stress is applied to the beam main reinforcement 61 embedded and set in the interior thereof in the direction of the arrow A in the form of being loaded with the weight of the beam 3. At this time, the beam main bar 61 does not only rely on the adhesive force for the length embedded in the concrete forming the column 2, but the cap 9 attached to the end portion 61a of the beam main bar 61 is In the concrete that constitutes No. 2, in the vicinity of the end portion of the cap 9 in the direction of the arrow A in FIG. 2 of the cap 9, a flange portion 91 formed in a shape having a diameter D2 larger than the outer diameter D1 of the main body is a pressure plate. In this form, the concrete of the column 2 is pressed by an amount corresponding to the area of the flange portion 91 shown in FIG. 3, so that the fixing body 7 can sufficiently resist the pulling force that the beam main bar 61 should bear. . That is, the beam main bar 61 and the cap 9 are screwed in such a manner that the contact portion 60 is formed between the side surface of the screw bushing 61b in the direction of arrow A in FIG. 2 and the side surface of the screw groove 93 in the direction of arrow A. Since the beams 9 and 61 are united together, the weight of the beam 3 loaded on the beam main bar 61 does not come out of the reinforcing bar threaded hole 92 of the cap 9 due to the weight. The cap 9 side is securely supported and borne by the corresponding contact portion 60. Therefore, each beam main bar 6
1 is a form in which the pull-out resistance force of the cap 9 is surely utilized, and a sufficient fixing force with respect to the weight of the beam 3 can be expressed. Thus, the beam 3 is attached to the beam joint portion 2a of the pillar 2,
The pillar 2 is constructed integrally with the pillar 2 by being connected by a predetermined number of beam main bars 61 embedded in the pillar 2.

In the embodiment described above, the engagement confirmation pin 10 is slidably fitted in the fixing member 7 mounted on the end portion 61a of the beam main bar 61, and the shaft portion 10b is slidably fitted in the through hole 94 of the cap 9. Although the example in which the fixing member 7 is fitted to the fixing member 7 is described here, as shown in FIG. 6, the cap 9 of the fixing member 7 is simply formed with a through hole 94 at the right side of FIG. However, the engagement confirmation pin 10 as shown in FIG. 5 may not be attached at all. In this case, the cap 9 of the fixing body 7
When the end portion 61a of the beam main bar 61 is mounted on the spring washer 11, the spring washer 11 is put into the screw hole 92 of the reinforcing bar prior to this. Then, the beam main bar 61 is screwed into the reinforcing bar screw-in hole 92 by a predetermined fitting length L4 in such a manner that the cap 9 is screwed onto the end portion 61a a predetermined number of times.
The engagement state of 1 and the cap 9 is confirmed by visual inspection through the through hole 94. Of course, like the fixing body 7 shown in FIG. 4 described above, the fixing body 7 shown in FIG. 6 has a gap 15 between the thread groove 93 and the threaded fastener 61b of the beam main bar 61 screwed therein. In the formed shape, the end face 61c of the beam main bar 61 is pressed by the spring force of the spring washer 11 forming the reinforcing bar pressing means 8 while being easy to screw in, so that the beam main bar 61 has its axis. Is securely screwed into the cap 9 while being pressed in the direction,
As a result, the effect that the main beam reinforcement 61 can develop a reliable and uniform fixing strength can be obtained without any change from the case of the embodiment described above and shown in FIG. The reinforcing bar pressing means 8 provided on the cap 9 is not limited to the spring washer 11, and may press the reinforcing bar end surface such as the end surface 61c of the beam main bar 61 screwed into the reinforcing bar screwing hole 92 of the cap 9. As long as it can be formed, for example, the reinforcing bar 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 head bolt 17 may be used in the fixing body 7 as the reinforcing bar pressing means 8 in place of the spring washer 11. That is, in the example shown in FIG. 7, in the cap 9, a screw 19 is screwed in a female screw shape in a through hole 94 provided so as to connect the bottom portion 92 a of the rebar screw-in hole 92 and the outside of the cap 9. The through-hole 94 is formed with a headed bolt 17, which is a bolt body as the reinforcing bar pressing means 8,
The screw 19 and the screw 17a of the head bolt 17 are screwed together, and are provided so as to be movable in the directions of arrows A and B.
Therefore, the headed bolt 17 has a shape that allows the headed head 17b to rotate forward and backward with respect to the screw hole 92 of the reinforcing bar by rotating the head 17b with respect to the screw 19 of the through hole 94. Therefore, when attaching the cap 9 of the fixing body 7 to the beam main bar 61, after 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 in from the outside of the cap 9 shown on the right side of FIG. Then, the headed bolt 17 has a shape in which the tip 17c shown at the left end in FIG. 7 comes into contact with the end surface 61c shown at the right end in FIG.
After contacting the end face 61c, the head 17b is further rotated in the tightening direction of the screw 17a until a predetermined torque is generated in the head bolt 17. As a result, the tip 17c
Is an end face 61c of the beam main bar 61 pressed in the direction of the arrow A in FIG. 7 is pressed against the side surface of the formed thread groove 93 in the direction of the arrow A in FIG. 7 to form the contact portion 60, so that the beam main bar 61 and the cap 9 are securely screwed together. Therefore, the headed bolt 17 can easily press the beam main bar 61 by screwing the beam main bar 61 into the reinforcing bar screw-in hole 92 of the cap 9 and then turning the head 17b from the outside of the cap 9. . Therefore, before the main beam beam 61 and the cap 9 are screwed together, the spring washer 1 is previously inserted into the screw hole 94 for the reinforcing bar.
It is not necessary to store the reinforcing bar pressing means such as 1 in advance, and the threading engagement work of the beam main bar 61 and the cap 9 and the mounting and tightening work of the headed bolt 17, that is, the pressing work of the beam main bar 61 are independent from each other. Since it can be made to proceed in a different form, there is a high degree of freedom in construction. When the head bolt 17 is screwed into the through hole 94 in this manner, the head 17b is exposed to the outside of the cap 9 and can be visually confirmed. It is prevented and reliable construction is possible. Also, the through hole 94
The headed bolt 17 that is screwed into and presses the end portion 61c of the beam main bar 61 has a shape in which the tip 17c abuts the end surface 61c. The position of the end face 61c can be confirmed by confirming that the margin L5 from the right side face has a predetermined length. Thus, it can be confirmed that the main beam reinforcement 61 and the cap 9 are screwed and engaged with each other with a sufficient fitting length of L4 or more. Therefore,
The headed bolt 17 can also serve to confirm the engaged state of the reinforcing bars such as the beam main bars 61 screwed into the reinforcing bar screw-in holes 92. In addition, the head bolt 17 is a cap 9
Before the beam main bar 61 is screwed into the reinforcing bar screwing hole 92, the beam main bar 61 is screwed into the through hole 94 to a certain depth in the through hole 94, and the beam main bar 61 is screwed by a predetermined length L4. Even if the head 1 is used afterwards, the above-mentioned torque and head 1 generated when the head bolt 17 is tightened.
Since the payout amount L5 and the like of 7b can be confirmed from the outside of the cap 9, no inconvenience occurs.

Further, in the above-mentioned embodiment, the case where the end face 61c of the beam main bar 61, which is a reinforcing bar screwed into the reinforcing bar screwing hole 92, is flat is described. The end surface 61c is as shown in FIG. In addition, it may be formed in a spherical shape. In the embodiment shown in FIG. 8, the bottom portion 92a of the cap 9 is formed in the shape of an elastic member having a thin wall in the left-right direction of FIG. 8, that is, the reinforcing bar pressing means for pressing the beam main bar 61. The means 8 is composed of a bottom portion 92a which is elastically deformable by the beam main bar 61 which is screwed into the reinforcing bar screw-in hole 92. Therefore, the fixing body 7 shown in FIG. 8 has an extremely simple structure, and the beam main bar 61 is screwed into the reinforcing bar screw-in hole 92 without the need for accessory parts other than the cap 9, and the end face 61c of the beam main bar 61 is screwed.
8 itself pushes the bottom portion 92a in the direction of arrow B, and the bottom portion 92a elastically pushes back the pushing by the end face 61c in the direction of arrow A. By pressing it against the left side surface of FIG. 8 of 93, the screwing engagement state can be surely made in a form preventing rattling. That is, the beam main bar 61 is attached to the reinforcing bar screwed hole 92.
It is possible to easily complete the engagement work between the beam main bar 61 and the cap 9 in one step, in which the end face 61c is pressed by some means after being screwed in. The cap 9 shown in FIG. 8 has a thin bottom portion 92a, and the end face 61c of the beam main bar 61 screwed into the reinforcing bar screw-in hole 92 is formed into a spherical shape. When 61 is screwed in by a predetermined fitting length L4, the spherical end surface 61c can be easily visually confirmed through the through hole 94 formed through the thin bottom portion 92a. I can. Therefore, the cap 9 and the beam main bar 61
There is no need to use any other means to confirm the screw fixing length.

In the above-described embodiment, the cap 9 has the through hole 94 formed so as to connect the bottom portion 92a of the rebar screw-in hole 92 and the outside of the cap 9 to each other. In the present invention, when the reinforcing bars 7, such as the beam main bars 61, are embedded and fixed in the concrete structure such as the pillar 2 using the fixing member 7, the reinforcing bar screw holes 92 are provided in order to obtain a reliable and uniform fixing strength. It suffices if 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 part 92a. It doesn't matter. That is, in the cap 9, some reinforcing bar pressing means having a shape in which a reinforcing bar to be fixed such as the beam main reinforcing bar 61 can be screwed into a reinforcing bar screwing portion such as the reinforcing bar screwing hole 92 and can press the reinforcing bar. It does not matter if it is formed in any shape as long as 8 can be provided. Therefore, the cap 9 is, for example, as shown in FIG.
The flange portion 91 may have a shape in which a taper is formed on both left and right sides in FIG. 9, whereby the fitting length L4 can be further increased, and of course, other shapes may be provided. Absent. Further, in the above-described embodiment, the fixing body 7 which is the reinforcing bar fixing jig according to the present invention is used for the end portion 61a of the beam main bar 61, and is embedded and fixed in the column 2. Reinforcing bars should be beam main bars 61
It is not limited to. That is, the reinforcing bar fixing jig according to the present invention may be used to fix the reinforcing bars other than the beam main bars 61 in concrete structures other than the pillars 2. Further, in the embodiment, the thread groove 93 formed in the reinforcing bar screw-in hole 92 of the cap 9 is formed in a female screw shape in a shape corresponding to the screw bar 61b of the beam main bar 61 made of deformed screw bar steel. The reinforcing bar to be fixed is not limited to the beam main bar 61, that is, the screw formed in the reinforcing bar screw-in hole 92 is of course formed arbitrarily corresponding to the screw of the reinforcing bar to be fixed. Is.

[0023]

As described above, according to the present invention, the cap 9 that can be embedded in the concrete structure such as the pillar 2 or the like.
Has a body such as
Beam main bar 6 to be anchored in a shape in which a male screw such as b is formed
A threaded portion such as a threaded hole 92 into which a reinforcing bar such as 1 is screwed is provided with a thread groove 93 into which a male screw of the reinforcing bar can be screwed.
And the like, and the reinforcing bar pressing means 8 is provided on the main body, and the end face 61 of the reinforcing bar is screwed into the screwed portion.
Since c is provided so as to be able to be pressed, the reinforcing bar pressing means 8 presses the end face 61c of the reinforcing bar screwed into the screwed portion, so that the reinforcing bar is pressed along its axial direction, The main body can be embedded in the concrete structure in a state where the male screw is pressed against one side of the female screw of the threaded portion to form the contact portion 60. That is,
By pressing the end face 61c of the reinforcing bar to be screwed into the screwed portion by the reinforcing bar pressing means 8 to form the contact portion 60, the male screw of the reinforcing bar moves relatively to the female screw of the screwed portion. The rebar and the main body are securely screwed together and integrated without causing so-called rattling. Therefore, if the end portions of the reinforcing bars are embedded in the concrete structure using the reinforcing bar fixing jig according to the present invention such as the fixing body 7 as in the case of fixing the beam reinforcing bars to the column structure, the embedding setting attachment in the concrete structure is performed. There is no concern that the reinforcing bar will come out of the main body due to rattling of the male screw of the reinforcing bar and the female screw of the threaded portion, and the load such as the weight of the beam loaded on the reinforcing bar will be transmitted to the main body side without waste. It can be done. As a result, a sufficient pull-out resistance can be developed in the main body, and a reliable fixing strength can be obtained for each rebar. And, since the screwing engagement between the main body and the reinforcing bar is completed by a simple operation of simply screwing the reinforcing bar into the screwed portion, the construction is extremely simple, and therefore, reliable construction for each reinforcing bar is possible. Therefore, a uniform fixing strength can be always obtained. Therefore, there is no risk that reinforcing bars will actually be insufficient in fixing strength due to variations in construction conditions. The rebar to be screwed into the threaded portion has a shape that the end face of the rebar is pressed by the rebar pressing means after the screwing operation, and the male screw is pushed in the axial direction of the rebar toward the female screw of the threaded portion. Therefore, before the screwing operation, a screw play may be formed between the male screw and the female screw so as to form the gap 15 by the screwing later. The main body and rebar can be screwed together smoothly.

Further, when the reinforcing bar fixing means 8 according to the present invention is constructed so that the reinforcing bar pressing means 8 is made of an elastic body such as a spring washer housed in the screwed section, the elastic body is in the screwed section. In, the end face of the reinforcing bar can be pressed by the elastic force possessed by the elastic body itself. Therefore, it is not necessary to apply an external force via the outside of the main body in order to press the reinforcing bar, so that the reinforcing bar and the main body can be screwed and engaged with each other easily with less work. Therefore, it is possible to shorten the time required for the work of fixing the reinforcing bars one by one. Further, 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 condition, and the main body and the reinforcing bar can always be engaged in a homogeneous state. Therefore, there is no concern that the fixing force of the fixed reinforcing bars will vary, and a more reliable reinforcing bar structure can be obtained.

Further, a through hole 94 is provided in the main body so as to communicate the bottom portion 92a of the screwed portion with the outside of the main body, and a reinforcing bar engagement confirmation member such as an engagement confirmation pin 10 is provided in the through hole 94. , A base end 10e of the base end 10e is slidably provided along the through hole 94 so that the base end 10e can be projected from the main body, and the abutting part 10c is provided on the threaded part side of the reinforcing bar engagement confirmation member. When the reinforcing bar fixing jig according to the present invention is configured by providing the reinforcing bar contacting parts such as the above, the end face of the reinforcing bar screwed into the screwed part contacts the reinforcing bar contacting part of the engagement confirmation member and pushes it. The matching confirmation member slides along the through hole, and the tip portion thereof can protrude to the outside of the main body. Therefore, by visually confirming the protrusion of the tip of the reinforcing bar engagement confirmation member,
It is possible to detect that the end surface of the reinforcing bar screwed into the screw-in portion comes into contact with the reinforcing bar contact portion and pushes it. Therefore, when the reinforcing bar and the main body are screwed together via the threaded portion, the screwing amount of the reinforcing bar, such as the fitting length L4, can be easily inspected and confirmed from the outside of the main body. That is, it is possible to easily check the screwing amount of the reinforcing bar by using the reinforcing bar engagement confirmation member and confirm that the main body and the reinforcing bar are engaged with each other one by one without any trouble. Therefore, by doing this, the work of fixing the reinforcing bar can be further ensured and homogenized, and the concrete structure using the reinforcing bar can be made of high quality. Further, if some means for detecting the protrusion amount of the tip, such as the marking portion 10M, for confirming the protrusion amount of the tip of the reinforcing bar engagement confirmation member is provided, the main body of the reinforcing bar end portion 61a can be provided.
It is possible to more easily confirm and inspect the engagement state of the main body with the reinforcing bar during the work of screwing and engaging the end of the body, etc., and even after the work is completed. There is no concern that the labor on site will increase.

Further, a through hole 94 is provided in the main body in such a manner that the bottom of the threaded portion communicates with the outside of the main body, and a bolt body such as a headed bolt 17 as the reinforcing bar pressing means 8 is provided in the through hole. When the rebar fixing jig according to the present invention is configured to be screwed into the threaded portion so that the bolt body can enter the threaded portion from the outside of the main body through the through hole. Thus, the end surface of the reinforcing bar can be pressed. Therefore, before attaching the main body to the reinforcing bar, it is not necessary to store the reinforcing bar pressing means in the threaded portion or the like in advance. Since the end surface of the reinforcing bar can be pressed arbitrarily in the form of being screwed into, the work of engaging the reinforcing bar and the main body and the pressing work of the end surface of the reinforcing bar can be independently proceeded in a mutually independent form, Greater flexibility in construction.
Further, the bolt body is provided with an operating portion such as a head portion 17b for screwing the bolt body with respect to the through hole 94 such that the tip end side thereof can press the end face of the reinforcing bar, which is arranged outside the main body. It is possible to confirm the reinforcing bar pressing amount of the bolt body by controlling the torque applied to the bolt outside the main body, and also to detect the position of the end surface of the reinforcing bar by detecting the protruding amount of the operating section 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 reinforcing bar pressing means is characterized in that the bottom part of the threaded part is elastically deformable by a reinforcing bar screwed into the threaded part, and the reinforcing bar fixing jig according to the present invention is constituted, The bottom part can be pressed by the end surface of the reinforcing bar and elastically deform to press the reinforcing bar.
Therefore, since it is not necessary to store or mount the reinforcing bar pressing means in the main body as a member other than the main body, the number of parts constituting the reinforcing bar fixing jig can be reduced and the structure can be simplified. In addition, the engaging work between the main body and the reinforcing bar as described above, in which the reinforcing bar is screwed into the threaded portion and then the end surface of the reinforcing bar is pressed, is a step of screwing the reinforcing bar into the threaded portion. The work can be simplified and the work time can be shortened. Therefore, the construction efficiency is improved while reliably fixing the reinforcing bars.

[Brief description of drawings]

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

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

FIG. 3 is a view on arrow III in FIG.

FIG. 4 is a cross-sectional side view showing a state where the reinforcing bars are not fitted in the reinforcing bar fixing jig shown in FIG.

5 is a perspective view showing an engagement confirmation pin portion in the reinforcing bar fixing jig shown in FIG. 2. FIG.

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 showing an example of a conventional reinforcing bar fixing method.

FIG. 11 is a diagram showing an example of a conventional reinforcing bar fixing method.

FIG. 12 is a diagram showing an example of a conventional reinforcing bar fixing method.

[Explanation of symbols]

 2 ... Concrete structure (pillar) 61 ... Reinforcing bar (main beam reinforcement) 61b ... Male screw (screw rod) 61c ... End face 7 ... Reinforcing bar fixing jig (fixing body) 8 ... Reinforcing bar pressing means 9 ... Main body (Cap) 92 ... Screwed part (reinforcing rod screw hole) 92a ... bottom part 93 ... female screw (thread 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 (head bolt)

Claims (5)

[Claims] 1. A body having a main body that can be embedded in a concrete structure, and a threaded portion into which a rebar to be fixed is screwed, the male thread being formed on the outer periphery of the main body. Reinforcing bar fixing provided by forming a male screw of the reinforcing bar and a female screw that can be screwed with the reinforcing bar pressing means on the main body so as to press the end face of the reinforcing bar screwed into the screwed portion. jig. 2. The reinforcing bar fixing jig according to claim 1, wherein the reinforcing bar pressing means comprises an elastic body housed in the threaded portion. 3. A through hole is provided in the main body in such a manner that the bottom of the threaded portion and the outside of the main body communicate with each other, and a reinforcing bar engagement confirmation member is provided in the through hole, and a tip portion thereof is with respect to the main body. 2. The reinforcing bar fixing jig according to claim 1, wherein the reinforcing bar fixing part is provided slidably along the through hole in a projectable form, and a reinforcing bar contact part is provided on the threaded part side of the reinforcing bar engagement confirmation member. 4. A through hole is provided in the main body in such a manner that the bottom of the threaded portion communicates with the outside of the main body, and a bolt body as a reinforcing bar pressing means is provided in the through hole with respect to the threaded portion. The reinforcing bar fixing jig according to claim 1, wherein the reinforcing bar fixing jig is screwed so as to freely move in and out. 5. The reinforcing bar fixing jig according to claim 1, wherein the reinforcing bar pressing means has a bottom portion of the screwed portion elastically deformable by a reinforcing bar screwed into the screwed portion.