JP2003239392A - Connecting structure and connector for concrete product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and firmly connect concrete products while drawing them to each other. <P>SOLUTION: An insert 25 with a threaded hole 26 is embedded and fixed to one side of one concrete product 100 to be connected, and a large-sized insert 27 with a threaded hole 31 is embedded and fixed to one side of the other concrete product 101 to be connected, provided with a cutout part 102. The connector 10 is fitted into the threaded hole 31 of the large-sized insert 27 by screwing the screw part 15. When a positive thread part of a turnbuckle bolt 11 of the connector 10 is screwed into the threaded hole 26 of the insert 25 through the rotation of a positive screw nut 20, the concrete products 100, 101 are drawn to each other and connected. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete product connection structure for connecting various concrete secondary products such as box culverts, water channels, water tanks and walls to concrete products such as housing foundations. .

[0002]

2. Description of the Related Art As a conventional technique of this kind, for example, as shown in FIGS. 12 to 14, a piece having a screw portion 2 on one side of a reinforcing bar on both concrete products 100 and 101 to be connected. The screw rebar 1 has its screw portion 2 exposed to the outside and fixed by embedding, and the screw rebar 1 is screwed into the long nut 3 so that the screw portion 2 faces each other. As shown in FIG. 16, both concrete products 100 to be connected,
Inserts 4 having screw holes 5 are embedded and fixed in 101, and a rectangular flat plate 6 having bolt holes 7 at both ends is sandwiched between the inserts 4 and 4 in accordance with the positions of the inserts 4 and the bolt holes. A flat plate connection method is known in which bolts 8 are tightened with respect to 7 to connect them.

In addition, although not particularly shown, a U-shaped plate, which is formed by bending it into a substantially U-shaped cross section and has a hole drilled on one surface, has a space between both concrete products to be connected. Between the pair of rebars that have been fixed by embedding, the cutting die is embedded and fixed along the inside of the U-shape, and after the concrete has hardened the cutting die is removed, and the U-shaped plate with bolts and nuts in the created space A flanged connection method is known in which are fixed and connected with back-to-back edges, and further, L-shaped angles having bolt holes on both sides are respectively inserted into the inserts embedded in both concrete products to be connected. An angle connection method is known in which the L-shaped angles are back-to-back and bolted together by bolts and nuts through the bolt holes on the other side as well as being bolted. To have.

By the way, in the rebar / long nut connection system,
Cannot pull concrete products to be connected.
Also, if you temporarily screw the long nut from the center,
At the start of screwing, if the shaft core and screw pitch do not match with high accuracy, screwing is impossible.

Further, the flat plate connection system is simply connected, and pulling is not possible at all, and when a force in the tensile direction of the concrete product is applied, it has only a small shear strength of the bolt. , The plate bends immediately against the lateral displacement, and it has almost no strength.

In addition, the flange connection system can be expected to have a pulling effect at first glance, but this is also only the bending resistance of the plate, and it bends with a little force. Even if the concrete products are not largely separated from each other, the pulling force exerted on the connection portion with almost a little force disappears, and it cannot be applied to the connection portion requiring water stoppage.

Further, the angle connection system is almost the same as the flange connection system, and the angle is bent by a slight force, and the pulling force cannot be expected. Further, since the body mounting position and the bolt mounting position are not on the same line in the pulling direction and are eccentric, even if the angle is reinforced, the pulling force does not increase due to structural problems.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art. Therefore, the object of the present invention is to
When connecting concrete products, it is possible to easily and firmly connect the concrete products by pulling them in a bolt form, and absorb the slight positional error that occurs when attaching the connecting tool to the concrete products. It can be connected.

[0009]

In order to achieve this object, the invention of the connecting structure for concrete products according to claim 1 is
A large insert that has a screw hole on one side of one concrete product to be connected and is fixed by embedding and fixing it to the other concrete product to be connected and has a notch on one side of the concrete product. Is embedded and fixed, and in the screw hole of the large insert,
A turnbuckle bolt having a reverse screw part and a positive screw part formed on the outer circumference, a socket loosely inserted on one end side of the turnbuckle bolt and having a screw part formed on the outer circumference, and a washer between the socket and the socket. A connecting tool including a reverse screw nut screwed via a screw is attached by screwing the threaded portion of the socket, and the other end side of the turnbuckle bolt of the connecting tool is in a screw hole of the small insert. A structure in which the turnbuckle bolt is screwed in and attached, and the turnbuckle bolt is screwed in via a rotational force with respect to a rotational force imparting means provided in the turnbuckle bolt in the connecting tool, and both concrete products are attracted to each other to be connected. It is a feature.

The invention for a concrete product connector according to a second aspect of the present invention is a turnbuckle bolt having a reverse screw portion and a positive screw portion formed on the outer periphery thereof, and an end portion of the turnbuckle bolt loosely inserted and having an outer periphery. A socket having a threaded portion formed therein, a reverse screw nut screwed between the socket and a washer, and a rotational force provided to the turnbuckle bolt for applying a rotational force to the turnbuckle bolt. It is characterized in that it includes a giving means.

According to a third aspect of the present invention, there is provided a concrete product connector according to the second aspect, wherein the rotating force applying means of the turnbuckle bolt is a positive screw nut screwed to the positive screw portion of the turnbuckle bolt. In order to restrict the movement of the positive screw nut, the positive screw nut includes a positive screw nut detent groove or a positive screw nut detent thread that is provided in the middle of the positive screw portion, and receives a rotational force for the positive screw nut. The turnbuckle bolt is screwed in.

According to a fourth aspect of the invention of a concrete product connector, in the second aspect, a non-threaded portion is formed in the middle of the positive screw portion of the turnbuckle bolt, and the cross-sectional shape of the non-threaded portion is a rotary tool. It is characterized in that it is formed in a polygonal shape that can be used.

According to a fifth aspect of the present invention, there is provided a concrete product connector according to the second aspect, wherein the turning force applying means for the turnbuckle bolt in the connector is a positive screw nut screwed to a positive screw portion of the turnbuckle bolt. Is welded and configured.

According to a sixth aspect of the present invention, there is provided a concrete product connector according to the second aspect, wherein the turning force applying means for the turnbuckle bolt in the connector is a positive screw nut screwed to a positive screw portion of the turnbuckle bolt. And a fixing pin is driven into and fixed to a through hole formed in the turnbuckle bolt.

According to a seventh aspect of the present invention of a concrete product connection structure, an insert having a screw hole is embedded and fixed on one side of one concrete product to be connected to form the other concrete product to be connected, and a cutout is provided. A large insert having a screw hole is embedded and fixed on one side of the concrete product where the portion is provided, and a screw with a head is loosely inserted in the screw hole of the large insert and a screw portion is formed on the outer periphery. And a connecting tool including a rotating force applying nut fixed to the bolt in a state where the socket is sandwiched between the bolt head and the bolt head, and the bolt of the connecting tool is attached. The end side of the screw is screwed into a screw hole of the small insert to be attached, and Bolts through rolling is screwed into the small insert, said both concrete product is characterized in configured to be coupled.

In the invention of a concrete product connector according to an eighth aspect, a bolt with a head, a socket loosely inserted in the bolt and having a threaded portion on the outer circumference, and the socket is sandwiched by the bolt head. In this state, the rotating force applying nut fixed to the bolt is included.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings and the operation thereof. First, the first embodiment will be described with reference to FIGS. 1 to 9.
In these drawings, the present connecting tool 10 includes a turnbuckle bolt, a socket, a round washer, a reverse screw nut, and a rotational force applying means.

The turnbuckle bolt 11 has a reverse threaded portion 12 and a normal threaded portion 13 engraved on the outer circumference of round steel.
2 is engraved with a length of approximately 3.5 / 1 of the full length threaded portion. The reverse threaded portion 12 has an insertion hole and a threaded portion 15 on the outer periphery.
A socket 14 having a hole and a round washer 16 having an elongated hole 17 are inserted, and a reverse screw nut 18 is screwed to the tip of the reverse screw portion 12. In addition, hole 1 of round washer 16
The reason why 7 is an elongated hole is to prevent the reverse screw nut 18 from getting into the inner hole of the socket 14.

The turning force applying means 19 for the turnbuckle bolt 11 provided on the turnbuckle bolt 11 includes a positive screw nut 20 screwed to the positive screw portion 13 side and a positive screw 1.
Positive screw nut rotation prevention groove 21 that is provided around the 3 side
(Or a positive screw nut rotation stop mountain), the positive screw nut 20 is rotated by a tool such as a spanner wrench, and the positive screw nut 20 is fixed to the turnbuckle bolt 11 at the position of the rotation stop groove 21 (or the rotation stop mountain). Further, it is adapted to rotate integrally with the turnbuckle bolt 11 for more than that.

The turning force applying means 19 of the turnbuckle bolt 11 can be variously modified, and as shown in FIGS. 3 and 4, is screwed to the positive screw portion 13 of the turnbuckle bolt 11. The fixing pin 23 may be driven and fixed in the through hole 22 formed in the positive screw nut 20 and the turnbuckle bolt 11, and the turnbuckle bolt 11 may be rotated integrally with the rotation of the positive screw nut 20, or Although not particularly shown, the positive screw nut 20 may be fixed to the turnbuckle bolt 11 by welding.

Further, as shown in FIGS. 5 and 6,
A non-screw portion 24 is formed in the middle of the positive screw portion 13 of the turnbuckle bolt 11, and the cross-sectional shape of the non-screw portion 24 is formed into a polygonal shape (preferably hexagonal shape) that can be used by a rotary tool such as a spanner wrench. It is also possible to screw the turnbuckle bolt 11 by directly turning the square non-threaded portion 24.

Next, a connecting structure for connecting the concrete products 100 and 101 to be connected to each other by the connecting tool 10 thus constructed will be described with reference to FIGS. 7 to 9.

First, a general insert 25 having a screw hole 26 is embedded and fixed on one side of one concrete product 100 to be connected. The insert 25 has a length such that sufficient adhesion strength and pull-out strength with the concrete product 100 can be obtained. On the other side of the concrete product 101, which is the other concrete product to be connected, is provided with the notch 102, and is further provided with the waterproof rubber 103, if necessary, the turnbuckle bolt 11 of the connector 10 is provided with about two turns. An insert 27 having a large screw hole is embedded and fixed.

The large-sized insert 27 is shaped so as to obtain sufficient pull-out strength with the concrete product 101,
A round steel pipe 28 having a screw hole 29, a round lid 30 screwed to one side of the round steel pipe 28 by screwing a threaded portion 31 thereof, and an anchor welded to the central portion of the end face of the non-threaded portion of the round lid 30. It is composed of a reinforcing bar 32.

Although not particularly shown, the large insert 27 has a screw tap at the bottom of the general insert.
A single screw rebar may be screwed therein.

Next, the connector 10 is fitted into the threaded hole 31 of the large-sized insert 27, and the threaded portion 1 of the socket 14 thereof is inserted.
5 is attached by screwing, and the other side of the turnbuckle bolt 11 in the connecting tool 10 on the side of the positive screw portion 13 is inserted into the screw hole 26 of the insert 25 through the rotation of the positive screw nut 20 which is the rotational force imparting means 19. Screwed in.

Then, one concrete product 100 side is screwed directly into the other concrete product 10 side.
1, the reverse screw nut 18 is tightened by the rotation of the turnbuckle bolt 11, the concrete products 100 and 101 are attracted to each other as shown by an arrow in FIG. 8, and as shown in FIG. Be connected.

In this way, the concrete product 100,
101 is connected, but in this case, the pulling force in the axial direction is 2 tons or more by the torque of the spanner wrench even if the screw diameter of the turnbuckle bolt 11 is M16, and the size of the screw diameter or the strength of the component material is increased. By doing this, 3 tons and 4 tons are sufficiently possible.

Thus, the thread diameter of the turnbuckle bolt 11 is ideally M16, and the thread diameter of the threaded hole 29 of the large insert 27 is ideally M45, but it can be made smaller and larger depending on the pulling force required. However, the screw diameter is not limited to this.

Next, the second embodiment will be described with reference to FIGS.
Will be described with reference to. In this example, both concrete products are connected by pulling only the concrete product on one side with only a positive screw. The connecting tool 32 in this example is a general hexagonal head 33.
With a bolt 34, a round washer 35 inserted through the elongated hole 36 on the head 33 side of the bolt 34, an insertion elongated hole 38, a socket 37 having a threaded portion 39 on the outer periphery, and a substantially end of the bolt 34. A nut 40 for applying a rotational force to the bolt 34 fixed to the part side is included.

As means for fixing the nut 40 to the bolt 34, the nut 40 and the bolt 34 are used in the same manner as in the case of the first embodiment other than the welding stop shown in the figure.
A fixing pin may be driven and fixed in the through hole formed in the hole.

In order to connect the concrete products 100 and 101 with the connecting device 32 thus constructed, the screw portion 31 of the socket 37 of the connecting device 32 is inserted into the screw hole 31 of the large insert 27 embedded and fixed in the concrete product 101. The bolt 34 is screwed into the screw hole 26 of the insert 25 fixedly embedded in the concrete product 100 by the rotational force of the bolt 40.

Then, as shown in FIG. 11, the concrete product 100 on one side is moved until it hits the nut 40, and the hexagonal head 33 of the bolt 34 approaches the concrete product 100 side, and the round washer 35 and the socket 37. And the concrete product 100, 10
1s are connected to each other.

[0034]

As described above, according to the present invention, when connecting concrete products, it is possible to easily and firmly connect them by pulling them in a bolt form.

Further, according to the present invention, the turnbuckle bolt is directly screwed into the insert on one side, and the insert on the other side is a large-sized insert having a diameter larger than the screw diameter of the turnback bolt, and the outer diameter is the screw diameter of the insert. According to the diameter, the inner diameter is fixed by a socket having a circular insertion hole larger than the screw diameter of the turnbuckle bolt, but the space between the turnbuckle bolt and the socket inner diameter is
It is possible to absorb a slight positional error that occurs when the connecting device is attached.

Further, according to the present invention, the tensile load of the bolt body is transmitted to the insert through the socket by the round washer / nut inside the socket, but when the torque is applied, a large friction resistance is exerted between the nut and the round washer. However, there is a possibility that the nut will loosen by the bolt as a result of non-slip during that time, but the nut is loosened by the bolt, but by using the screw in the direction opposite to the rotation direction of the bolt, the nut is tightened and does not loosen.

Further, according to the invention of claim 4, the cross-sectional shape of the non-screwed portion at the substantially central portion of the turnbuckle bolt is preferably hexagonal, and it is large when the rotational force is transmitted thereto by using a span wrench. Torque is generated, the tensile force in the axial direction becomes considerable, and concrete products with a large load can be pulled and connected.

In summary, according to the present invention, the large pulling force and the absorption of the mounting error can be obtained as the maximum effect, and in the conventional large product, the PC steel material is used to completely stop the water in the connecting portion. The tightening method by tension, which was only possible with large-scale construction, can be done with extremely little labor and parts, and the construction cost can be greatly reduced. In addition, since the components of the connecting tool are simple and are general-purpose processed products, they are very cheap and economical.

[Brief description of drawings]

FIG. 1 is a half sectional view of an example of a connector according to the present invention.

FIG. 2 is a side view of a turnbuckle bolt.

FIG. 3 is a partial side view showing an example of fixing a nut.

4 is a cross-sectional view taken along line 4-4 of FIG.

FIG. 5 is a half sectional view of another example of the connector according to the present invention.

6 is a cross-sectional view taken along line 6-6 of FIG.

7 is a side view showing the positional relationship in the concrete product connection structure by the connection tool shown in FIG. 1. FIG.

FIG. 8 is a side view for explaining a concrete product connecting structure by the connecting tool shown in FIG. 1 in a tightened state of the connecting tool.

FIG. 9 is a side view showing a concrete product connecting structure by the connecting tool shown in FIG. 1 in a connected state.

FIG. 10 is a side view of a partially cutaway portion of another example of the connector according to the present invention.

11 is a side view showing a concrete product connecting structure by the connecting tool shown in FIG. 10 in a connected state.

FIG. 12 is a side view for explaining a reinforcing bar / long nut connecting system, which is an example of a conventional connecting structure, showing a state in which a long nut is screwed to a single screw reinforcing bar embedded and fixed in a concrete product on one side.

FIG. 13 is a side view for explaining a reinforcing bar / long nut connecting method, which is an example of a conventional connecting structure, in which a long nut is screwed onto a single-screw reinforcing rod embedded and fixed in a concrete product on one side, and a concrete product on the other side. The state of being screwed to the single-screw rebar that is embedded and fixed in Fig.

FIG. 14 is a side explanatory view showing a connected state by a reinforcing bar / long nut connecting method which is an example of a conventional connecting structure.

FIG. 15 is a side exploded explanatory view showing a connection method by a flat plate connection method which is another example of the conventional connection structure.

FIG. 16 is a front view showing a connected state by a flat plate connecting method which is another example of the conventional connecting structure.

[Explanation of symbols]

10, 32 connector 11 Turnbuckle bolt 12 Reverse thread 13 Positive thread 14 socket 15 Threaded part 16 round washers 17 slots 18 Reverse screw nut 19 Rotational force applying means 20 Positive screw nut 21 Nut rotation prevention groove 22 through hole 23 fixing pin 24 Non-screw part 25 inserts 26 screw holes 27 Large insert 31 screw holes 33 Hexagonal head 34 Volts 35 Round washer 36 slot 37 socket 38 insertion slot 39 Thread 40 nuts 100, 101 concrete products 102 notch

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2E125 AA72 AA76 AF01 AG10 AG14                       AG23 BA02 BA23 BA56 BB08                       BB30 BE07 BE08 CA05 EA17

Claims (8)

[Claims] 1. An insert having a screw hole is embedded and fixed on one side of one concrete product to be connected, and the other concrete product to be connected is provided with a cutout portion, and a screw hole is provided on one side of the concrete product. A large insert having is fixed by embedding, in the screw hole of the large insert, a turnbuckle bolt having a reverse screw part and a positive screw part formed on the outer periphery, and is loosely inserted at one end side of the turnbuckle bolt, A connector including a socket having a threaded portion formed on the outer periphery thereof and a reverse screw nut screwed between the socket and a washer is attached by screwing the threaded portion of the socket, and the connection is made. The other end side of the turnbuckle bolt of the tool is screwed into the threaded hole of the insert and attached, Turnbuckle bolt is screwed via a rotary force against the rotational force applying means provided on the turnbuckle bolt coupling structure of the concrete product, characterized in structure in which the both of the concrete product is connected are drawn together. 2. A turnbuckle bolt having a reverse screw part and a positive screw part formed on the outer circumference, a socket loosely inserted on one end side of the turnbuckle bolt and having a screw part formed on the outer circumference, and the socket. And a reverse screw nut screwed through a washer between the turnbuckle bolt and a turnbuckle bolt for giving a turning force to the turnbuckle bolt. 3. The turning force applying means of the turnbuckle bolt, a positive screw nut screwed to the positive screw part of the turnbuckle bolt, and the positive screw part for restricting movement of the positive screw nut. The turnbuckle bolt is screwed in by receiving a rotational force for the positive screw nut, which includes a positive screw nut detent groove or a positive screw nut detent thread provided around the middle of the concrete. Product connector. 4. The turning force applying means in the turnbuckle bolt has a non-threaded portion formed in the middle of the positive threaded portion of the turnbuckle bolt, and the cross-sectional shape of the non-threaded portion is a polygonal shape usable by a rotary tool. The connector for a concrete product according to claim 2, which is formed. 5. The connecting tool for concrete products according to claim 2, wherein the turning force applying means of the turnbuckle bolt in the connecting tool is configured by welding a positive screw nut screwed to a positive screw portion of the turnbuckle bolt. . 6. The turning force imparting means of the turnbuckle bolt in the connecting tool comprises a positive screw nut screwed to a positive screw portion of the turnbuckle bolt, and a fixing pin driven into a through hole formed in the turnbuckle bolt. The concrete product connector according to claim 2, which is fixed. 7. A concrete product having a screw hole is embedded and fixed on one side of one concrete product to be connected to form another concrete product to be connected, and a screw hole is provided on one side of the concrete product provided with a notch. A large-sized insert having a head is embedded and fixed in the screw hole of the large-sized insert, a socket with a head, a socket loosely inserted in the bolt and having a threaded portion on the outer circumference, and the socket with the bolt head. A connector including a rotating force imparting nut fixed to a bolt in a state of being sandwiched by is attached by screwing the threaded portion of the socket, and the end side of the bolt of the connector is attached to the screw hole of the small insert. It is screwed in and attached, and the bolt is screwed into the small insert through the rotation of the torque applying nut in the connector. Marete connection structure of the concrete product, characterized in structure in which the both of the concrete product is connected. 8. A headed bolt, a socket loosely inserted in the bolt and having a threaded portion formed on the outer periphery thereof, and a torque applying nut fixed to the bolt so as to sandwich the socket with the bolt head. Concrete product connectors including.