JP2001020374A - Connecting end structure of concrete product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely perform connecting work by providing a connecting recessed part opened to a contact surface of another concrete product, burying an anchor bar without being connected to a reinforcement bar, and projecting the tip of the anchor bar into the connecting recessed part. SOLUTION: A female screw member 55 is locked to a screw part 15 exposed to the inside of a connecting recessed part 30 of a product B through a nut 59, and both products A, B are combined to align the axes CL of both anchor bars 10 with each other. The combined connecting recessed parts 30 are opened to the front F and the rear R, so that the connecting work of a connector 50 and the work for confirming the connecting part after connection can be conducted from the front F side and the rear R side of the products. The connecting anchor bars 10 are buried in the state of being not connected to a reinforcement bar disposed in the products, so that the connecting portion (connecting recessed part 30) is provided without restrictions on the disposing position of the reinforcement bar, and an error caused in the projecting position of the tip of the anchor bar 10 is restrained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection end structure of a concrete product manufactured by dividing and manufacturing a concrete product in which a reinforcing reinforcing bar and a connecting anchor bar are provided inside, and connected and integrated with another concrete product by a connecting device. .

[0002]

2. Description of the Related Art As a conventional connection method for connecting concrete products manufactured in advance by division, as shown in FIG. 6, both ends of opposite main bars projecting from a concrete product are welded and connected. There is something. In the connection end structure of the concrete products a and b, a reinforcing reinforcing bar 5 including a main reinforcing bar 1, an auxiliary reinforcing bar 2, and a distribution bar 3 is provided therein, and the reinforcing bar 5 is disposed on the front side f shown on the left side in the drawing. The tip of the main reinforcing bar 1 is exposed in the recessed portion 7 opening to the contact surface t and the front surface f of the concrete products a and b, and the distal end of the main reinforcing bar 1 arranged on the rear surface r side shown on the right side in the figure is The contact surface t and the rear surface r
It is exposed in the recessed part 7 opening to the side. When connecting the concrete products a and b, the tips of the main bars 1 are combined so as to face each other, and
Each of the divided copper members is surrounded by an abutment of copper n, and is welded and connected individually in an atmosphere of a shielding gas G (carbon dioxide gas).

[0003]

However, since the main reinforcing bar 1 which is a component of the reinforcing reinforcing bar 5 is connected to the auxiliary reinforcing bar 2 and the distribution bar 3 by welding or bundling, all the main reinforcing bars 1 to be connected are connected. It is very difficult to accurately arrange the exposed position of the front end of the work, and the work such as the above-described connection work and the state of the connection part after connection is performed on one side (both concrete products a and b). Can be performed only from the open surface side of the recessed portion 7 in a state in which the combination is performed. Therefore, if a sufficient working space cannot be obtained on the open surface side, the connection work becomes difficult, and the work time associated therewith becomes difficult. It is not suitable for the connection end structure of concrete products for the purpose of reducing construction costs and uniform construction with proper connection.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object the simple and extremely workable and reliable connection work.
In addition, it is an object of the present invention to provide a concrete product connection end structure in which a connection point can be provided without being restricted by a position where reinforcing reinforcing bars provided inside the concrete product are arranged.

[0005]

In order to achieve the above-mentioned object, a connecting end structure for a concrete product according to the first aspect of the present invention comprises a reinforcing steel bar and an anchoring bar for connection, and another concrete product is connected by a connector. A connecting end structure of a concrete product to be connected to and integrated with another concrete product to be connected, which is in contact with another separately manufactured concrete product or a pre-cast concrete product, and continuous with the corresponding contact surface.
Providing a connection recess opening on the side surface, disengaging the anchor bar to the reinforcing bar, burying the anchor so that its axis is orthogonal to the contact surface, and projecting the distal end of the anchor bar into the connection recess. It is characterized by that.

According to the present invention having the above-described structure, by embedding the anchor bar in the reinforcing bar in a non-bonding manner, the connecting point of the concrete product can be freely set without being restricted by the position where the reinforcing bar is provided. When connecting with another concrete product to be connected, since the combined connecting concave portion is opened on two sides, the connecting operation and the like are performed from the two side surfaces of the combined concrete product. Further, it is possible to extremely easily and reliably check the state of the connecting portion after the connection from the two side surfaces in a short time.

According to a second aspect of the present invention, in the connecting end structure for a concrete product, the connecting concave portion includes a punching wall for closing one of two side surfaces continuous with the contact surface. As a result, it is possible to prevent breakage of the tip of the connecting anchor bar when stocking the concrete product or transporting it to the construction site, and also when the concrete product is connected to another concrete product to be connected. At the time of abutment, if a sufficient working space for connecting work cannot be obtained on the open surface side of the connecting part, if the punching wall is punched and the connecting recess is communicated, the connecting part or the connecting part after connecting is obtained. Confirmation and the like can be performed very easily and reliably within a short time from the two side surfaces or the punched wall side of the concrete product.

According to a third aspect of the present invention, there is provided a concrete product connecting end structure, wherein the connecting recess has a punching wall for closing two side surfaces continuous with the contact surface. As a result, it is possible to prevent breakage of the tip of the connecting anchor bar when stocking the concrete product or transporting it to the construction site, and also when the concrete product is connected to another concrete product to be connected. At the time of contact
If one of the punching walls on the side surface on which a sufficient working space for the connection work is obtained is punched to connect the connection recess, the connection work and the state of the connection portion after the connection can be confirmed by a concrete product. Can be extremely easily and reliably performed in a short time from the side of the punching wall with which the communication is made.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, referring to FIGS.
Each embodiment showing the connection end structure of the concrete product of the present invention will be described in detail.

FIGS. 1 and 2 are schematic illustrations of an embodiment of the present invention. In the drawings, reference numerals A and B indicate concrete products (hereinafter referred to as products) which have been manufactured by dividing in advance. The two products A and B are formed in a flat plate shape, respectively, and the main bars 1, the distribution bars 2, and the main bars 2 assembled inside the products A and B in a similar shape.
The reinforcing reinforcing bar 5 constituted by the auxiliary reinforcing bar 3 and the anchoring bar 10 for connection are buried, and the anchoring bar 10 is connected to the connector 50 in four connecting recesses 30 provided at intervals.
And integrated.

The connector 50 is composed of a male screw member 51, a female screw member 55 and a nut 59 as shown by the drawing lines in the figure. The male screw member 51 is a screw of the anchor bar 10 embedded in the product A. A female screw 52 corresponding to the portion 15 and a tool engaging portion 54 at one end outer edge are provided. The female screw member 55 is embedded in the product B and a female screw 56 corresponding to the male screw 53 of the male screw member 51. An insertion hole 57 slightly larger in diameter than the screw portion 15 of the anchor bar 10 and a locking surface 59k of a nut 59 attached to the screw unit 15 of the anchor bar 10 embedded in the product B at the end of the insertion hole 57 are provided. Abutting jaw 57k,
A tool engagement portion 58 is provided on the outer edge of the other end. As shown in the lower right part of FIG. 2, the coupler is constituted by a square frame-shaped engaging member 61 having through holes 63 at both ends for inserting the screw portions 15 of the anchor bars 10 and two nuts 65. The connection of both products A and B is possible even by using the connected coupler 60.
In the drawing, reference numeral LN indicates a lock nut for preventing loosening or the like after the connection of the coupler.

The anchoring bar 10 has a screw portion 15 formed at the tip end of the deformed reinforcing bar 12 and is disposed substantially parallel to the main bar 1 of the reinforcing bar 5, and the axis CL of the screw portion 15 is aligned with the contact surface T. The screw portion 15 is exposed in the coupling recess 30 so as to be orthogonal to the reinforcing bar 5 in a non-bonded state.
As the anchor bar, a bar formed of a deformed reinforcing bar and a high-strength bolt welded to the tip thereof by friction welding may be used.

Further, the number of the connecting portions (the connecting recesses 30) of the two products, the diameter and length of the anchor bar 10, and the size of the connecting device 50 are determined by the weight of the product itself acting after the connecting of the two products. It is appropriately selected according to various conditions such as pressure and external force.

Next, referring to FIG. 3, a connecting end portion 100 according to an embodiment of the present invention will be described in detail. The connection end portion 100 has a connection recess 30 that opens in the contact surface T, the front surface F, and the rear surface R, and the screw portion 1 of the anchor muscle 10 is provided in the connection recess 30.
5 is exposed. Each contact surface T is provided with a ridge 71 useful for simplifying the work of combining the two products A and B and improving the shearing resistance of the connected portion after the connection, and a concave groove 7 fitted to the ridge 71.
3 are provided. In the illustrated example, the contact surface T of the product A
Is provided with a concave groove 73 on the contact surface T of the product B. However, a concave groove 73 is provided on the contact surface T of the product A.
The contact surface T of the product is provided with a ridge 71 or both products A,
A concave portion may be provided on the contact surface T of B, and a member fitted into the concave portion may be interposed.

When connecting the two products A and B, the male screw member 51 is screwed into the screw portion 15 exposed in the connection recess 30 of the product A, and the screw portion 15 exposed in the connection recess 30 of the product B is connected. After the female screw member 55 is locked via a nut 59, the two products A and B are combined so that the axes CL of the two anchor bars 10 coincide with each other.
The male screw member 51 and the female screw member 55 attached to 0 are connected. At this time, since the combined connecting recess 30 is open to the front face F and the rear face R, the work of connecting the connector 50 and checking the state of the connecting part after the connection is performed on the front face F of the combined product. Side and the rear surface R side.

According to the connecting end portion 100, since the connecting anchor bar 10 is embedded in the reinforcing bar 5 provided inside the product in a non-bonded state, it is restricted at the position where the reinforcing bar 5 is provided. It is possible to provide the connecting portion (the connecting concave portion 30) without being performed, and it is possible to suppress an error (an error occurring in the connecting portion) occurring at the projecting position of the distal end of the anchor muscle 10. When the two products are combined, the connecting recesses are opened on the front and rear surfaces. Therefore, the operations of connecting the connector 50 and checking the state of the connecting portion after the connection are performed on the front F side and the rear surface R of the product. It can be performed very easily and reliably within a short time from the side.

Next, referring to FIG. 4, a connecting end 110 according to another embodiment of the present invention will be described in detail. The connecting end 110 has a connecting recess 30 which is open to the contact surface T and the front surface F, and has a rear surface R side closed by a punching wall. In the connecting recess 30, the screw portion 15 of the anchor muscle 10 is provided. It is exposed. Each contact surface T is provided with a ridge 71 useful for simplifying the work of combining the two products A and B and improving the shearing resistance of the connecting portion after the connection.
A concave groove 73 that fits into the ridge 71 is provided. The connecting recess 30 may be opened on the contact surface T and the rear surface R, and the punching wall 31 may be provided on the front surface F. Further, in the illustrated example,
A convex ridge 71 is provided on the contact surface T of the product A, and the contact surface T of the product B is provided.
Is provided with a concave groove 73, but the concave groove 7 is provided on the contact surface T of the product A.
3 and the protruding ridge 71 may be provided on the contact surface T of the product B, or a concave portion may be provided on the contact surface T of both products A and B, and a member fitted into the concave portion may be interposed.

The punching wall 31 has a thin wall portion 32 which can be punched by a tool (not shown), and a marker line 33 which is slightly projected or recessed on the rear surface R indicating the position of the connecting recess 30. The marker line 33 can be easily formed integrally by forming a slight groove at a position corresponding to the manufacturing formwork at the time of placing the product, or by providing a convex member around. Also, as the punching wall 31, as shown in the drawing in the drawing,
A punching wall 35 composed of a thin wall portion 36 capable of being punched and a concave portion 37 slightly recessed on the rear surface R indicating the position of the coupling concave portion 30 is also used for manufacturing during product placement. If a protruding member for forming the recess 37 is provided at a corresponding position of the mold, it is possible to easily integrally form the same and obtain the same effect.

When the two products A and B are connected, the male screw member 51 is screwed into the screw portion 15 exposed in the connection recess 30 of the product A, and the screw portion 15 exposed in the connection recess 30 of the product B is connected. The female screw member 55 is locked via a nut 59, and the two products A and B are combined so that the axes CL of the anchor bars 10 coincide with each other.
The male screw member 51 and the female screw member 55 attached to are connected. At this time, since the combined concave portion 30 is open to the front face F, the work of connecting the coupler 50 and checking the state of the connected portion after the connection is performed from the front face F side of the combined product. If a sufficient working space cannot be obtained on the front surface F side, before combining the two products A and B, each of the punching walls 31 is punched out with a tool such as a hammer (not shown) so that the connecting recess 30 is formed on the rear surface. By communicating with R, a series of operations can be performed not only from the front F side of the product but also from the rear R side.

According to the connecting end portion 110, since the connecting anchor bar 10 is buried in a non-bonded state in the reinforcing bar 5 provided inside the product, the anchor bar 10 is restrained at the position where the reinforcing bar 5 is provided. It is possible to provide the connecting portion (the connecting concave portion 30) without being performed, and it is possible to suppress an error (an error occurring in the connecting portion) occurring at the projecting position of the distal end of the anchor muscle 10. Also, when combining both products, the connecting recess 3
If a sufficient working space cannot be obtained on the open surface (front surface F) side of No. 0, the punching wall 31 is punched out with a tool such as a hammer to combine the two products A and B, and the connecting recess 30 is formed on the rear surface. If it is connected to R, the work such as connection work and confirmation of the state of the connection part after connection can be performed not only on the front side F of the product but also on the rear side R.
Since it can be performed from the side, a series of operations can be performed extremely easily and reliably within a short time. Further, at the time of stocking the product, transporting the product to the construction site, and the like, the connecting recess 30 is closed on one side by the punching wall 31, so that the screw portion 15 of the anchor bar 10 can be prevented from being damaged. it can.

Next, referring to FIG. 5, a connecting end 120 which is another embodiment of the present invention will be described in detail. The connecting end 120 has a connecting recess 30 which is open to the contact surface T and has the front surface F side and the rear surface R side closed by a punching wall. In the connecting recess 30, the screw portion 15 of the anchor muscle 10 is provided. It is exposed. Each contact surface T is provided with a ridge 71 useful for simplifying the work of combining the two products A and B and improving the shearing resistance of the connecting portion after the connection.
A concave groove 73 that fits into the ridge 71 is provided. In the illustrated example, the protruding ridge 71 is provided on the contact surface T of the product A, and the concave groove 73 is provided on the contact surface T of the product B. However, the concave groove 73 is provided on the contact surface T of the product A. Provided, the protruding line 71 on the contact surface T of the product B.
Alternatively, a concave portion may be provided on the contact surface T of both products A and B, and a member fitted into the concave portion may be interposed.

The punching wall 31 has a thin wall portion 32 which can be punched by a tool (not shown), and a marker slightly protruding or concavely provided on the front surface F and the rear surface R indicating the position of the connection concave portion 30. The marker line 33 can be easily formed integrally by forming a small groove at a position corresponding to the manufacturing mold or placing a convex member around the product frame at the time of placing the product. Further, as the punching wall 31, a thin wall portion 36 capable of being punched as shown by a drawing line in the drawing, and a connecting recess 30
The punching wall 35 formed by the front face F indicating the position of the punching surface and the recessed portion 37 slightly recessed on the rear surface R side also has a projection for forming the recessed portion 37 at a position corresponding to the manufacturing form when the product is driven. If the installation member is provided, it can be easily formed integrally as described above.

When the two products A and B are connected, first, one of the punching walls 31 capable of sufficiently securing the connection working space of the connecting device 50 is punched by a tool such as a hammer (not shown) to form a connecting recess. 30. Next, the male screw member 51 is connected to the screw portion 15 exposed in the connection concave portion 30 of the product A.
And the screw portion 1 exposed in the connection concave portion 30 of the product B
5, the female screw member 55 is locked via a nut 59,
After the two products A and B are combined so that the axes CL of the two anchor bars 10 match, the male screw member 51 and the female screw member 55 attached to the opposite anchor bars 10 are connected. At this time, since the combined connecting recess 30 is open to one of the connecting working spaces enough to secure a connecting working space, the connecting work of the connecting device 50 and the operation of checking the state of the connecting portion after the connecting are easy. Can be done.

According to the connecting end portion 120, since the connecting anchor bar 10 is buried in a non-bonded state in the reinforcing bar 5 provided inside the product, the anchor bar 10 is restricted at the position where the reinforcing bar 5 is provided. It is possible to provide the connecting portion (the connecting concave portion 30) without being performed, and it is possible to suppress an error (an error occurring in the connecting portion) occurring at the projecting position of the distal end of the anchor muscle 10. In addition, both products A, B
If one of the punching walls 31 is punched out beforehand to connect the connecting recesses 30 before combining, the connecting work and the operation of checking the state of the connecting portion after the connecting are extremely easy in a short time. , And reliably. Further, at the time of stocking the product, transporting the product to the construction site, and the like, the connecting recess 30 is closed on two sides by the punching wall 31.
The breakage of the screw portion 15 of the anchor muscle 10 can be prevented.

Although FIGS. 1 to 5 exemplify flat concrete products, the present invention is also applied to connecting ends of large-sized assembled culvert blocks, assembled waterway blocks, assembled retaining wall blocks and the like. be able to.

[0026]

According to the structure for connecting a concrete product according to the first aspect of the present invention, the structure is as described above in detail. The connecting portion can be provided without any problem, and the connecting operation can be performed with high operability and reliability with a simple configuration.

According to the second or third aspect of the present invention, the thread portion 15 of the anchor bar 10 is prevented from being damaged when the product is stocked or transported to a construction site. By punching the punching wall and connecting the connecting recess to the connecting work side,
There are effects such as extremely good workability and a reliable connection operation.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of an embodiment of the present invention.

FIG. 2 is a partially cutaway view of FIG. 1 and an explanatory view of a coupler used therein.

FIG. 3 is an explanatory view showing a connection end portion 100;

FIG. 4 is an explanatory view showing a connection end portion 120;

FIG. 5 is an explanatory view showing a connection end portion 130;

FIG. 6 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 A-Concrete product B-Concrete product CL-Axis line of screw part F-Front surface of concrete product R-Back surface of concrete product T-Abutment surface of concrete product 1-Main bar 5-Reinforcing bar 10-Anchor bar 12-Deformed bar 15 -Screw part 30-connection concave part 31-punched wall 35-another punched wall 50-connector 60-another connector

Claims (3)

[Claims] 1. A concrete product connecting end structure in which a reinforcing reinforcing bar and a connecting anchor bar are provided internally, and connected to and integrated with another concrete product by a connector, wherein the concrete product is connected to another concrete product to be connected. A connecting concave portion opened on two side surfaces continuous with the abutting surface and an anchoring bar is not connected to the reinforcing bar, and the anchoring bar is embedded so that its axis is orthogonal to the abutting surface. A connection end structure for a concrete product, wherein a tip of a streak protrudes into the connection recess. 2. The connecting end structure for a concrete product according to claim 1, wherein the connecting recess has a punched wall that closes one of two side surfaces that are continuous with the contact surface. 3. The connection end structure for a concrete product according to claim 1, wherein the connection recess has a punched wall that closes two side surfaces connected to the contact surface.