JP3354261B2 - Concrete product connection method and concrete product connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting concrete products and a connector for concrete products enabling the connection method.
A concrete product connection method suitable for use as a column, beam-beam member connection portion, or a wall-to-bearing wall member connection portion of a wall-type precast method, and a concrete product connection enabling the connection method It is about tools.

[0002]

2. Description of the Related Art Concrete products such as so-called precast concrete manufactured in factories or work sites and used as members need to interconnect the concrete products at the site.

[0003] In order to connect such concrete products,
Conventionally, various methods have been proposed and put into practical use. Some of them are shown in FIGS.

In the method shown in FIG. 6, first, bolts 103, 104 are buried in the connecting surfaces of concrete products 101, 102 to be connected in a state where the bolts 103, 104 are projected in advance. , 104 are screwed with a buckle nut 105 to connect the two concrete products 101, 102, and a concrete or mortar 10
By filling 7, concrete products are connected to each other.

[0005] In the method shown in FIG. 7, connecting reinforcing bars 108, 109 are provided on connecting surfaces of concrete products 101, 102 to be connected in a protruding state.
A tubular sleeve 11 made of steel is attached to the joining reinforcing bars 108 and 109.
0, a cement-based non-shrinkage high-strength grout 111 is filled between the uneven inner wall of the cylindrical sleeve 110 and the inserted reinforcing bars 108, 109, and the reinforcing bar 1
08 and 109 are integrated with each other, and concrete or mortar 107 is filled in the gap 106 formed at the joint between the concrete products to connect the concrete products.

Further, in the method shown in FIG. 8, jointing reinforcing bars 108 and 109 are provided on the connecting surfaces of concrete products 101 and 102 to be connected in the same manner as described above, and the joining reinforcing bars 108 and 109 are provided. A method of connecting concrete products to each other by welding and joining 108 and 109 to an attached steel plate 112 such as an angle steel, and filling concrete or mortar 107 into a gap 106 formed at a connection portion between the concrete products. It is.

[0007]

However, here,
In the conventional method for connecting concrete products described above, first, in the method using a tanbuckle type nut 105 shown in FIG. 6, the concrete products 101 and 102 to be connected are very accurate. If it is not installed at the position, the bolts 103, 104 cannot be screwed by the nut 105, and the bolts 103, 104
Since the position of embedding in the concrete products 101 and 102 also requires extremely high precision, it is necessary to pay close attention to the production of the concrete products and the connection work thereof.

Further, in the method shown in FIGS. 7 and 8, the concrete products 101 and 102 are compared with the method of connecting the buried bolts with the nuts described above.
Although the installation position of the joints and the embedding positions of the joining reinforcing bars 108 and 109 do not require as much accuracy as the difference, in the method shown in FIG. In the method of filling the grout 111 and the method shown in FIG. 8, the work of welding the reinforcing steel bars 108 and 109 to the attached steel plate 112 is a complicated work, and the workability of the connection work is poor. Was.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned various problems of the conventional method for connecting concrete products, and an object of the present invention is to allow a certain degree of error absorption when connecting concrete products. Another object of the present invention is to provide a method for connecting concrete products having good connection workability and a connector for concrete products which enables the connection method.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a connecting bolt buried in a state protruding from a connecting surface of one concrete product to be connected, and the connecting bolt at one end. A female screw to be screwed is carved, a shaft having an engagement bulging portion near the tip at the other end is connected, and an arc-shaped tongue protruding along the shaft from a wall surface to which the shaft is connected is provided. The formed first connection member is mounted using the female screw formed at one end of the first connection member, and is buried in a state protruding from the connection surface of the other concrete product to be connected. On one end of the bolt, a female screw to be screwed into the joining bolt is engraved at one end, and on the other end peripheral surface, the shaft of the first connecting member and the engagement bulging portion formed on the shaft are slightly A recess for accommodating with a margin is opened, and the recess is opened. A second connecting member having an arc-shaped protruding piece formed on an end of a peripheral surface in a direction opposite to a peripheral surface of the first connecting member so that an inner peripheral wall of an arc-shaped tongue piece slidably contacts the first connecting member; The first connecting member is mounted using one of the female screws formed at one end of the second connecting member, and then the shaft of the first connecting member and the engaging bulge formed on the shaft are moved by the concrete product. This fits into the receiving recess of the second connecting member, and then rotates the connecting member to turn the arc-shaped tongue formed on the first connecting member into the circle formed on the second connecting member. The shaft of the first connecting member and the engaging bulge formed on the shaft, which are overlapped with the arc-shaped projecting piece and fitted into the housing concave portion of the second connecting member, are in a state where they do not come off and are connected in this state. The member is further screwed into the above-mentioned connecting bolt buried while protruding from the concrete product. By Rukoto,
The widening wall surface of the engaging bulging portion formed on the first connecting member is brought into close contact with the narrowing wall surface of the housing concave portion formed on the second connecting member to connect and fix both concrete products. The method of connecting concrete products was used.

Further, according to the present invention, there is provided a female screw which is screwed into a buried joint bolt protruding from a connection surface of one concrete product connected to one end, and an engagement bulging portion is provided at the other end. A first connecting member having an arc-shaped tongue protruding along the axis from a wall to which the axis is connected and having the axis connected near the tip, and the other concrete product connected to one end A female screw is screwed into the joint bolt embedded in a state protruding from the connection surface of the first connecting member, and the shaft of the first connecting member and the bulge for engagement formed on the shaft are formed on the other peripheral surface. A concave portion for accommodating the portion with some margin is opened, and an inner peripheral wall of an arc-shaped tongue piece formed on the first connecting member at an end of a peripheral surface in a direction opposite to a peripheral surface where the concave portion is opened. And a second connecting member formed with an arc-shaped projecting piece with which And the REIT product of the connector.

[0012]

According to the concrete product connecting method of the present invention and the concrete product connecting device which enables the connecting method, the connecting bolts buried in a state protruding from the connecting surface of the concrete product are connected to each other. Consolidation work
After each of the first and second connecting members is attached to the joining bolt, the shaft of the first connecting member and the engaging bulge formed on the shaft are moved to the second position by moving the concrete product. The connection method can be achieved by fitting the connection member into the receiving recess of the connection member, and then screwing the connection member to the joining bolt, so that a concrete product connection method with good workability of connection work, and the connection method It is a connector for concrete products that can be used.

According to the present invention described above, the shaft of the first connecting member and the recess for accommodating the second connecting member into which the bulging portion for engagement formed on the shaft are fitted have some margin. The first connecting member shaft and the shaft even if the moving direction of the concrete product to be connected and the embedding position of the joining bolt in the concrete product are slightly displaced because the size is such that it can be held and accommodated. The bulging portion for engagement formed in the second
Work to fit into the accommodation recess of the connecting member of
Since the connection can be performed, a connection method capable of absorbing a certain amount of error when connecting a concrete product, and a connection tool that enables the connection method are provided.

[0014]

Hereinafter, the present invention will be described in detail with reference to examples of the present invention.

FIGS. 1 to 5 show a concrete product connecting method according to the present invention and a concrete product connecting device enabling the connecting method. The concrete products 1a and 2a are the connecting surfaces of the concrete products 1 and 2, respectively.

The connection surfaces 1a and 2 of the concrete product
a, bonding bolts 3 and 4 are buried in a state protruding from the connection surfaces 1a and 2a, respectively.
Is formed into a right-hand thread, and the other joining bolt 4 is formed into a left-hand thread, and the concrete products 1 and 2 are connected using the two joining bolts 3 and 4.

Reference numerals 5 and 6 denote a first connecting member having a substantially columnar shape for fixing the above-mentioned connecting bolts 3 and 4, and a second connecting member.
It is a connecting member.

At one end 5a of the first connecting member 5, a female screw 7 screwed with the right-hand screw joining bolt 3 is engraved.
Its peripheral surface is hexagonal. A shaft 8 is connected to the other end 5b of the first connecting member 5 so that the shaft 8 is aligned with the female screw 7 at the end thereof. I have. Further, on the end wall surface of the first connecting member 5 to which the shaft 8 is connected, an arc-shaped tongue 10 protruding along the same circumference at a predetermined distance from the shaft 8 is provided.
Are formed.

Further, one end 6a of the second connecting member 6
Like the first connecting member 5, a female screw 11 to be screwed into the joining bolt 4 of the left-hand thread is engraved, and the peripheral surface of the end is hexagonal. On the peripheral surface of the other end 6b of the second connecting member 6, the shaft 8 of the first connecting member 5 and the engaging bulge 9 formed on the shaft 8 are connected to the female screw 11
The shaft 8 that can be accommodated from the side until a position where the shaft center is aligned with the shaft 8
In addition, the openings of the concave portions 12 and 13 having an outer shape slightly larger than the outer shape of the engagement bulging portion 9 formed on the shaft 8 are formed. Further, the inner peripheral wall of the arc-shaped tongue piece 10 formed on the first connecting member 5 is slidably in contact with an end of a peripheral surface of the concave portion 12, 13 in a direction opposite to the peripheral surface on which the opening is formed. A projecting piece 14 is formed, and a boss 15 is formed at one end of the arc-shaped projecting piece 14.

The first connecting member 5 configured as described above
And using the second connecting member 6 to join and fix the connecting bolts 3 and 4 of the reverse screw buried in a state protruding from the connecting surfaces 1a and 2a of the concrete products 1 and 2, respectively. First, the first and second connecting members 5, 5
6 with the internal threads 7 and 11 respectively formed at one end thereof.
To make the state shown in FIG.

Next, the concrete product 1 on which the first connecting member 5 is mounted is moved downward, and the shaft 8 of the first connecting member 5 and the engagement bulging portion 9 formed on the shaft 8 are moved. The recesses 12 and 13 for storage formed in the second connecting member 6
Into the state shown in FIG.

Thereafter, the first connecting member 5 is rotated in a direction in which the first connecting member 5 is screwed to the joining bolt 3, and the arc-shaped tongue 10 formed on the first connecting member 5 is connected to the second connecting member 6. Superimposed on the outer peripheral surface of the arc-shaped projecting piece 14 formed in
As shown in FIG. 4, the recesses 12, 1 for housing the second connecting member.
The shaft 8 of the first connecting member fitted into the shaft 3 and the bulging portion 9 for engagement formed on the shaft 8 are in a state in which they do not come off.

In the above state, when the first connecting member 5 is further screwed into the joining bolt 3 buried in a state protruding from the concrete product 1, the first connecting member 5 is formed on the first connecting member 5. The boss 15 formed at the end of the arc-shaped tongue 10 at the end of the arc-shaped projecting piece 14 of the second connecting member 6
And the first connecting member 5 and the second connecting member 6
It is screwed into each of the connecting bolts 3 and 4 of the reverse screw like an integral tan buckle type nut, and the widening wall surface 9a of the engaging bulging portion 9 formed on the first connecting member 5 is formed. Is tightly attached to the narrowing wall surface 13a of the housing recess 13 formed in the second connecting member 6, and the connecting bolts 3, 4 are connected without looseness as shown in FIG. Is fixedly joined.

Thereafter, if necessary, concrete or mortar is filled in the gap between the concrete products 1 and 2 where the joining bolts 3 and 4 are joined and fixed in the same manner as in the prior art, so that the concrete products can be connected to each other. The connection is made and the connection of the concrete products is completed.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment.
It goes without saying that various modifications and changes are possible based on the technical concept of the present invention.

For example, in the above embodiment, the joining bolts 3 embedded in each of the concrete products to be joined are used.
Although a screw having a reverse screw was used as 4, a bolt having a male screw in the same direction may be used.

Further, the shapes of the first connecting member 5 and the second connecting member 6 shown in the above embodiment are merely examples, and for example, only the end peripheral surface is not hexagonal. The connecting member may be a hexagonal column as a whole, and the shape of the engagement bulging portion 9 may be a sphere instead of a cylinder.

[0028]

According to the concrete product connecting method and the concrete product connecting device according to the present invention described above, the joint buried in a state protruding from the connecting surface of the concrete product is provided. After connecting the first and second connecting members to the joining bolts, the connecting bolts are connected to the shaft of the first connecting member and the bulging portion for engagement formed on the shaft. Is moved into the concave portion for accommodating the second connecting member, and then the connecting member can be further screwed into the connecting bolt to achieve the connection, so that the concrete product with good workability of the connecting operation can be achieved. And a concrete product connector that enables the connection method.

According to the present invention described above, the shaft of the first connecting member and the recess for accommodating the second connecting member into which the bulging portion for engagement formed on the shaft is fitted have some margin. The first connecting member shaft and the shaft even if the moving direction of the concrete product to be connected and the embedding position of the joining bolt in the concrete product are slightly displaced because the size is such that it can be held and accommodated. The bulging portion for engagement formed in the second
Work to fit into the accommodation recess of the connecting member of
Since the connection can be performed, a connection method capable of absorbing a certain amount of error when connecting concrete products, and a connection tool that enables the connection method are provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a connector for a concrete product according to the present invention.

FIG. 2 is a cross-sectional view showing one step of the method for connecting concrete products according to the present invention.

FIG. 3 is a cross-sectional view showing one step of the method for connecting concrete products according to the present invention.

FIG. 4 is a sectional view showing one step of the method for connecting concrete products according to the present invention.

FIG. 5 is a cross-sectional view showing one step of the method for connecting concrete products according to the present invention.

FIG. 6 is a cross-sectional view showing a conventional method for connecting concrete products.

FIG. 7 is a cross-sectional view illustrating a conventional method for connecting concrete products.

FIG. 8 is a cross-sectional view showing a conventional method for connecting concrete products.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete product 2 Concrete product 1a Concrete product connection surface 2a Concrete product connection surface 3 Right screw connecting bolt 4 Left screw connecting bolt 5 First connecting member 5a One end of first connecting member 5b First The other end of the connecting member 6 The second connecting member 6a One end of the second connecting member 6b The other end of the second connecting member 7 Female screw 8 Shaft 9 Engagement bulging part 9a Enlarged wall surface of the engagement bulging part 10 Arc-shaped tongue piece 11 Female screw 12 Housing recess 13 Housing recess 13a Wall surface of housing recess narrowing 14 Arc projecting piece 15 Boss

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) E04B 1/38-1/61 E04B 1/21 E04B 5/00-5/20

Claims (2)

(57) [Claims] 1. A connecting bolt embedded in a state protruding from a connecting surface of one concrete product to be connected is provided with an internal thread screwed into the connecting bolt at one end, and an engaging expansion at the other end. A first connecting member having an arc-shaped tongue protruding along the axis from a wall surface to which the axis is connected, the first connecting member being connected to a shaft having a protruding portion near the distal end; Attach using the female screw formed at one end of the
A female screw that is screwed into one end of the joining bolt buried in a state protruding from the connecting surface of the other concrete product to be connected is engraved on one end, and the first screw is formed on the other end peripheral surface.
A concave portion for accommodating the shaft of the connecting member and the swelling portion for engagement formed on the shaft with some margin is opened, and a peripheral surface end portion in a direction opposite to a peripheral surface where the concave portion is opened is provided. The first
The second connecting member formed with an arc-shaped protruding piece with which the inner peripheral wall of the arc-shaped tongue piece formed on the connecting member slides is connected to the second connecting member.
Mounting using the female screw formed at one end of the connecting member, and then moving the concrete product through the shaft of the first connecting member and the engaging bulge formed on the shaft. Is inserted into the accommodation recess formed in the second connecting member, and then the connecting member is rotated to form the arc-shaped tongue formed in the first connecting member on the second connecting member. In this state, the shaft of the first connection member and the engagement bulge formed on the shaft are inserted into the housing recess of the second connection member so as not to come off. By screwing the connecting member to the joining bolt buried in a state where the connecting member further protrudes from the concrete product, the widening wall surface of the engaging bulge formed in the first connecting member is fixed to the second connecting member. To reduce the width of the accommodation recess formed in the connecting member Is adhered to the surface, a method of connecting concrete product, characterized in that connecting and fixing the both concrete products. 2. A female screw which is screwed into a buried joint bolt in a state protruding from a connection surface of one concrete product connected to one end, and a bulging portion for engagement is provided near the other end at the other end. A first connecting member having an arcuate tongue protruding along the axis from a wall surface to which the axis having the axis is connected, and a connecting surface of the other concrete product connected to one end. A female screw to be screwed into the buried joint bolt in a protruding state is engraved, and the other end peripheral surface is slightly attached to the shaft of the first connecting member and the engagement bulging portion formed on the shaft. A concave portion for accommodating the concave portion is opened, and an inner peripheral wall of an arc-shaped tongue piece formed on the first connecting member is slidably in contact with an end of a peripheral surface in a direction opposite to a peripheral surface where the concave portion is opened. A second connecting member having an arc-shaped projecting piece formed thereon. A connector for concrete products.