JPH1122108A - Reinforcement coupling device and foundation work method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction work method capable of constituting a foundation of precast concrete while providing a reinforcement coupling device required for the construction work method. SOLUTION: The reinforcement coupling device consists of retaining members 11, 21 with internal surfaces capable of being abutted against a reinforcement surface and tapered-shaped external surfaces, coupling members 12, 22, with which the retaining members 11, 21 can be wedged and which have male screw sections 13, 23 on external surfaces, and a sleeve 30, which has female screw sections 31 capable of being screwed to the male screw sections 12, 23 of the coupling members 12, 23 and to which a grout-material filler hole 32 is formed. In the construction work method using the reinforcement coupling device, a plurality of precast concrete, to which parts of reinforcements disposed on the insides, are projected, is arranged so that the front ends of the projecting reinforcements are faced oppositely, the sleeve 30 is inserted to one of the opposed reinforcements, the coupling members 13, 23 are inserted to both opposed reinforcements, the sleeve 30 is screwed to the coupling members 12, 22, a grout material is injected from the grout-material filler hole 32 and the reinforcements are connected, and concrete is placed between the disposed precast concrete.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for connecting rebars and a foundation construction method using the same, and more particularly to an apparatus capable of coping with the use of rebars made of deformed bars (hereinafter referred to as deformed rebars). .

[0002]

2. Description of the Related Art Generally, the foundation of a building is made of concrete, and although the shape and size vary depending on the type and height of the building to be built, concrete is cast on site. Therefore, the conventional method of foundation work is to surround the formwork around the area where the foundation concrete can be poured, place a reinforcing bar inside the formwork, and then put concrete inside the formwork. After the concrete had flowed in and solidified, the formwork was removed.

[0003] Further, in connection devices for deformed reinforcing bars, there have been ones in which the reinforcing bars to be connected are limited to threaded bars, and are connected by a sleeve having a female screw engaging with a threaded section of the threaded bar.

[0004]

However, since the place where the foundation of the building is provided is below the surface of the ground, it is usually excavated largely. Therefore, the work of forming the formwork must be performed in the excavated narrow space. In addition, work efficiency was poor. In addition, since it takes several days for the concrete to solidify, not only can the formwork be removed during that time,
Other work was also suspended until the foundation work was completed.

[0005] Further, as for the rebar connecting device, there has been a long-awaited demand for a device capable of connecting other types of deformed rebar without being limited to the threaded bar. An object of the present invention is to provide a construction method capable of forming a foundation with precast concrete in view of the above points, and to provide a rebar connection device necessary for the construction method.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a locking member having an inner surface capable of abutting against the surface of a reinforcing bar and having a tapered outer surface. A connecting member having an external thread portion on the outer surface thereof, and a sleeve having a female screw portion capable of being screwed with play on the external thread portion of the connecting member, and having a grout injection hole formed substantially in the center thereof. The gist of the present invention is a rebar connection device characterized by the above.

[0007] Preferably, the locking member is a locking member divided so as to be able to abut on the reinforcing bar from both sides, and the connecting member is a connecting member having a hexagonal head. Is preferred. Further, the present invention provides a precast concrete of a desired shape and size to constitute a foundation of a building, with a portion of the reinforcing steel disposed inside projecting at a predetermined position, and at a foundation construction site,
The precast concrete is arranged so that the tips of the protruding reinforcing bars oppose each other, and a sleeve is inserted in advance only in one of the opposing reinforcing bars, and a connecting member is inserted in advance in both of the opposing reinforcing bars, and the opposing reinforcing bars are respectively inserted. At the same time, the connecting member is moved toward the distal end of the reinforcing bar to wedge the locking member, and the sleeve is moved while being screwed to the male thread portion of one of the connecting members. Is screwed into both connecting members, grouting agent is injected from the grouting agent injection hole of the sleeve, the reinforcing bars are connected, and after connecting the opposing reinforcing bars, concrete is placed between The gist of the present invention is a foundation construction method using a rebar connection device, which is characterized by placing a steel bar.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. First, an embodiment of a rebar connection device will be described. As shown in FIG. 1, the present embodiment is a device for connecting two opposing reinforcing bars 1 and 2, and both of these reinforcing bars are deformed reinforcing bars each having a surface formed in a node shape. This joint is of a different general shape from the screw joint.

Therefore, in the present embodiment, locking members 11 and 21 that can abut on the surfaces of such deformed reinforcing bars 1 and 2 are provided. The locking members 11 and 21 can be sandwiched from both sides (up and down in the figure) of the rebars 1 and 2
It is divided into two pieces 11a, 11b (21a, 21b), each of which has an inner surface formed in an uneven shape, and is capable of partially abutting while just avoiding joints on the surfaces of the reinforcing bars 1, 2. is there. In addition, the portions (recessed portions) that are not in contact with the surfaces of the rebars 1 and 2 engage the knots, and the two resiliently lock the deformed rebars 1 and 2. The outer surfaces of the locking members 11 and 21 are formed with a taper, and the taper is formed by increasing the thickness of the locking members 11 and 21 toward the distal ends of the reinforcing bars 1 and 2. . In addition, the locking member 1 divided into two
The inner surfaces of 1a, 11b, 21a, and 21b are different in the state of unevenness because the state of the nodes on the surfaces of the reinforcing bars 1 and 2 is different as shown in the figure. The contact is made possible accordingly.

[0010] Also, connecting members 12 and 22 are provided which can be loosely inserted into both rebars 1 and 2. The connecting members 12, 22
Is composed of external thread portions 13 and 23 and hexagonal head portions 14 and 24, and is loosely inserted into the rebars 1 and 2 so that the external thread portions 13 and 23 face the distal end side. This male screw part 1
Reference numerals 3 and 23 each have a very large pitch and a rough structure in which the helical protrusions are simply formed. In the embodiment, the burrs are cut off by casting. In addition, the hexagonal head 14 is to be rotated by a rotating tool (not shown) such as a spanner, and it is not necessary to limit the hexagonal head 14 to a hexagon, but a normal spanner can be used if the size is adapted. Then, the locking members 11 and 12
1 is in contact with the surfaces of the reinforcing bars 1 and 2
The engaging members 11 and 21 can be surrounded by the connecting members 12 and 22 by moving the connecting members 12 and 22 toward the distal ends of the rebars 1 and 2. The connecting members 12 and 22 are wedge-fitted by the taper of the locking members 11 and 21 in contact with the outer surfaces of the connecting members 11 and 21. In order to improve the state of wedge attachment, the inner surfaces of the connecting members 12 and 22 are also tapered, so that they can widely contact the outer surfaces of the locking members 11 and 21 ( (See FIG. 3).

Sleeve 3 for connecting both reinforcing bars 1 and 2
Numeral 0 denotes a cylindrical shape, and an internal thread 3
1 is provided, and a grout injection hole 32 penetrating substantially in the center is provided. The female screw portion 31 can be loosely screwed into the male screw portions 13 and 23 of the connection members 12 and 22 and has a sufficient play. Further, the grout injection hole 32 is configured to have such a size that a viscous grout can be injected.

Next, the mode of use will be described. FIG.
As shown in FIG.
The locking members 11 and 21 are brought into contact with the surface near the tip of the second member 2. At this time, the two divided locking members 11 and 21 are arranged so as to sandwich the rebars 1 and 2 from opposite sides,
The contact state is adjusted so that the joint portions of the rebars 1 and 2 are engaged with the concave portions on the inner surfaces of the locking members 11 and 21. And
The locking members 11 and 21 are surrounded by the connecting members 12 and 22 that have been inserted in advance, and at the same time, the locking members 11 and
The wedge 21 is connected to the connecting members 12 and 22. At this time, the locking members 11 and 21 are not exposed near the tips of the rebars 1 and 2, and the male screw portions 13 and 23 of both the connecting members 12 and 22 are in a state of being opposed to each other. In this state, the sleeve 30 previously inserted through one of the rebars 2
Is screwed (rotated in the direction of the arrow in the drawing) while being screwed into the male screw portion 23 of one connecting member 22, the sleeve 30 passes through the male screw portion 23 of the connecting member 22 as shown in FIG. Also, the male screw portion 13 of the opposing connecting member 12 is screwed. At this time, since the male screw portions 13, 23 of the connecting members 12, 22 have sufficient play with the female screw portion 31 of the sleeve 30, the connecting members 12, 22 have a sufficient play.
22 does not match,
Even if the pitches of 3, 23 do not match, both male threads 1
It is possible to screw 3 and 23 simultaneously. Therefore, by simultaneously screwing the two male screw portions 13 and 23, both the connecting members 12 and 22 are connected to the sleeve 30, and the two rebars 1 and 2 can be connected. Here, the hexagonal heads 14 and 24 of both connecting members 12 and 22 are rotated, and the connecting members 12 and 22
As shown in FIG. 4, the screwing of the connecting members 12 and 22 and the locking members 11 and 21 is strengthened, and
The state of engagement between the inner surfaces of the steel bars 1 and 21 and the knots on the surfaces of the reinforcing bars 1 and 2 can also be made strong. Furthermore, the play in one direction can be removed even in the screwed state between the connecting members 12 and 22 and the sleeve 30 that have been screwed together with play. In this state, the grouting agent is injected from the grouting agent injection hole 32 provided substantially at the center of the sleeve 30 to fix the connection state. At this time, the grouting agent is filled in the hollow portion remaining substantially at the center of the sleeve 30, and the female screw portion 31 of the sleeve 30 and the connecting member 12,
The grouting agent penetrates from a gap existing between the male screw portions 13 and 23 of the 22 and the sleeve 30 can be fixedly adhered.

Next, a method of foundation work will be described with reference to FIGS. As shown in FIG.
The foundation component 51 made of precast concrete in advance
, 53, 54 are manufactured in a predetermined shape and size, and a plurality of basic constituent parts 51, 52,.
4 are connected to each other and their lengths are adjusted so as to reach a predetermined length. In addition, each of the basic components 51 and 52.
.. Reinforcing bars are arranged at predetermined intervals inside 53 and 54, of which reinforcing bars 1a,.
・ Manufacture with only the protrusion. Then, as shown in FIG.
53, 54 are arranged, and at this time, the reinforcing bar 1 protruding from the basic components 51, 52,.
, 2a... are arranged such that the tips can be opposed on the side to be connected. At this time, the rebar 1a
.., 2a are arranged so as to have an appropriate gap that is neither extremely narrow nor wide. Moreover, at the stage before being arranged, the opposing rebars 1a,.
, 2a, ..., connecting members 12a, ..., 22a.
Are inserted, and sleeves 30a are also inserted through one of the reinforcing bars (reinforcing bars located on the right side in the figure) 2a. At this time, the connecting members 22a
By already screwing a part of the sleeve 30a to a part of the part, the length of the protruding reinforcing bars 2a can be effectively used. In this state, as described above, the connecting members and the sleeves do not fall out of the gaps between the reinforcing bars 1a..., 2a. become.

Subsequently, the reinforcing bar 1a opposed by the connecting device
.., 2a,... Are performed in the order described in the above-described operation mode. After completing the connection of all the reinforcing bars 1a, 2a, ..., concrete is poured only into the portions connected by the connecting device, as shown in Fig. 6. This concrete is cast by closing the two surfaces (front and back in the figure) with a formwork as usual, and injecting concrete through the upper opening. The construction is completed by the solidification of the cast concrete.

In the construction method described above, the gap between the opposing reinforcing bars 1a, 2a is made minute, and the connecting member and the sleeve are inserted through one of the reinforcing bars 2a, , Each basic constituent part 51... 54
Can be reduced. In other words, the area for placing concrete as the last step is reduced, the solidification rate of concrete is increased, and
Since 54 is already solidified concrete, the next work can be performed without waiting for solidification of the poured concrete. In addition, the opposite reinforcing bar 1a
.., 2a... Can be connected by the sleeve 30 by the sufficient play between the male screw portions 13 and 23 of the connecting members 12 and 22 and the female screw portion 31 of the sleeve 30 without making the positions thereof strict. Therefore, the connecting operation can be performed easily and quickly.

It goes without saying that various embodiments can be adopted without departing from the spirit of the present invention. For example, the connecting members 12 and 22 may be manufactured by a method other than casting. In this case, the male screw portions 13 and 23 are configured so that they can be screwed into the female screw portion 31 of the sleeve 30 with play. That is enough.
Further, a single grout injection hole 32 provided substantially at the center of the sleeve 30 is provided in a large size, but the size can be changed depending on the type of grout to be injected, and the number is increased. It may be something. Also, the reinforcing bars 1a projecting from the basic components 51 ... 54.
.., 2a... Have different numbers and locations depending on the type and size of the foundation to be provided. At this time, since the basic constituent parts 51 to 54 are precast concrete, it is easy to make them different at the stage of production.

[0017]

As described above, according to the present invention, a locking member having an inner surface capable of contacting the surface of a reinforcing bar and having a tapered outer surface can be wedge-wrapped while surrounding the locking member. A coupling member having an external thread portion on the outer surface thereof, and a sleeve having a female thread portion capable of being screwed with play in the external thread portion of the coupling member, and having a grout injection hole formed substantially in the center thereof. Since the rebar connecting device is characterized in that the rebars to be connected are arranged in a state facing each other, a locking member is locked near the tip of the rebar, and a connecting member is connected to the locking member. By wedging, the male screw portion of the connecting member can be provided so as to be opposed to both rebars, and the sleeve can be screwed so as to overlap both male screw portions to easily connect the two. Kill. In addition, the connecting members that can be disposed at both ends of the reinforcing bar to be connected can generate sufficient play between the male screw portion and the female screw portion of the sleeve, and the axial center of both connecting members and the male screw portion can be formed. Even if the pitches do not match, they can be screwed together by a single sleeve.

If the locking member is a locking member that is divided so as to be able to abut on the reinforcing bar from both sides, when the connecting member is wedged, the state of contact with the reinforcing bar surface is uniform. It is possible to stabilize the state of locking and to facilitate the processing of the inner surface, so that it is possible to configure the inner surface of a shape that matches the surface of the rebar,
Not only the threaded bar but also other types of deformed bars can be locked. Further, if the connecting member is a connecting member having a hexagonal head, the connecting member can be rotated from a state in which the sleeve is screwed so as to overlap the two opposing connecting members, and the fixed member can be fixed. When connecting the reinforcing bar, the connecting member can be screwed inward of the sleeve, and the locking state between the reinforcing bar and the locking member, the wedge state between the locking member and the connecting member, and the connecting member. And the threaded state of the male screw part of the sleeve and the female screw part of the sleeve can be strengthened.

Further, according to the present invention, when providing a precast concrete having a desired shape and size to form a foundation of a building, a part of the reinforcing bars provided inside is made to protrude at a predetermined position, At the foundation work site, precast concrete is lined up so that the tips of the protruding rebars face each other, and a sleeve is inserted in advance only on one of the opposing rebars, and the connecting members are connected to both opposing rebars in advance. Inserting and attaching a locking member near the tip of the opposing reinforcing bar, moving the connecting member in the direction of the tip of the reinforcing bar and wedge the locking member, and attaching the sleeve to the male thread of one of the connecting members Moved while screwing, the sleeve is screwed to both connecting members,
Reinforcing bar characterized by injecting grouting agent from the grouting agent injection hole of the sleeve to connect rebars, and after connecting the opposing rebars, placing concrete between each of the arranged precast concretes Since the gist of the foundation construction method using the connection device, most of the concrete that constitutes the foundation can be manufactured in advance in the factory, and a foundation made of stable concrete regardless of the weather or temperature at the time of foundation construction Obtainable. In addition, since the area where concrete must be cast at the site is very small, the next scheduled work can be performed without waiting for the completion of the foundation work and without waiting for the concrete to solidify for at least several days. You can do it.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a rebar connection device.

FIG. 2 is an explanatory diagram showing a use mode.

FIG. 3 is an explanatory view showing a connected state.

FIG. 4 is an explanatory view showing a connected state.

FIG. 5 is an explanatory view showing a method of foundation work.

FIG. 6 is an explanatory view showing a method of foundation work.

[Explanation of symbols]

 1, 2 Reinforcing bar 11, 21 Locking member 12, 22 Connecting member 13, 23 Male screw part 14, 24 Hex head 30 Sleeve 31 Female screw part 32 Grout injection hole 51, 52, 53, 54 Basic component part

Claims (5)

[Claims] 1. A locking member having an inner surface capable of abutting against a reinforcing bar surface and having a tapered outer surface, a male screw portion on the outer surface capable of being wedge-fitted while surrounding the locking member. A connecting member comprising: a connecting member; and a sleeve having a female screw portion capable of being screwed with play in the male screw portion of the connecting member, and having a grout injection hole formed substantially in the center thereof. . 2. The rebar connection device according to claim 1, wherein the locking member is a locking member divided so as to be able to abut on the reinforcing bar from both sides. 3. The rebar connection device according to claim 1, wherein the connection member is a connection member having a hexagonal head. 4. A divided locking member having an inner surface capable of abutting against the rebar surface and having a tapered outer surface, and the entirety of the divided locking member is brought into contact with the rebar. While being able to wedge while surrounding in a state, a connecting member having an external thread portion and a hexagonal head portion on the outer surface, and a female screw portion which can be screwed with play on the external thread portion of the connecting member and substantially at the center. A rebar connection device comprising a sleeve having a grout injection hole penetrating therethrough. 5. A precast concrete having a desired shape and size to constitute a foundation of a building is provided by projecting a part of a reinforcing bar disposed inside at a predetermined position. Precast concrete is arranged so that the tips of the rebars facing each other, and the sleeve is inserted in advance into only one of the opposing rebars, and the connecting member is inserted through both the opposing rebars in advance. Attaching the locking member near the tip, moving the connecting member in the direction of the tip of the rebar and wedge it to the locking member, and moving the sleeve while screwing it into the male thread portion of one of the connecting members, After screwing into both connecting members, grouting agent is injected from the grouting agent injection hole of the sleeve to connect the reinforcing bars, and after connecting the opposing reinforcing bars, A method of foundation work using a rebar connection device, characterized by placing concrete between each of the precast concretes.