JP2530586B2 - Connection device for concrete products - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for connecting concrete unit bodies forming grooves, underdrains and the like.

[0002]

2. Description of the Related Art For example, a so-called U-shaped groove for constructing an open channel such as a side trench, or a box culvert for constructing an underdrain is often made of a concrete product consisting of a unit of a certain size. To be done. When they are continuously installed, conventionally, a method has been adopted in which bolts or inserts are connected to adjacent unit bodies and the connecting members are tightened with nuts or bolts using washers.

However, the contact surfaces of the connection member and the washer to be tightened are both smooth, and even if one of the bolt holes of the connection member is tightened with a bolt having a long hole, it will be displaced when an external force is applied to the unit bodies. It may end up. In order to prevent this, conventionally, it was necessary to weld the washer to the connecting member after tightening.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above points, and its object is to provide fixing means capable of engaging with each other on the contact surfaces of the connector main body and the washer pressed against the connector main body. , To prevent the unit from moving out of the connected state.

[0005]

In order to solve the above-mentioned problems, the present invention provides connecting means 11 and 12 which are embedded nuts, embedded bolts or insertion holes for bolts on the side surface of the end of a concrete unit body 10, Adjacent unit body 1
Two bolt holes 21 and 22 adapted to the distance between 0 and 10 connecting means 11 and 12 are arranged in parallel in the connector main body 20, and at least one bolt hole is formed as a long hole extending in the parallel direction. Then, the engaging portion 23 formed of regular irregularities in the direction intersecting with the juxtaposed direction is formed on the outer surface of the connector main body 20, and the engagement partner 24 capable of engaging with the irregularities is formed in the connector main body. A bolt 26 formed on a washer 25 that contacts the outer surface of the bolt 20 and passed through the bolt holes 21, 22 and the through hole 29 of the washer 25.
When the nut and the nut 27 are tightened, the engaging portion 23 and the engaging partner 2
4 is engaged with each other to prevent displacement.

[0006]

1 to 4 show a unit body 10 for forming an underdrain.
Is an example of a box culvert made of concrete.

In the unit body 10, nuts 27 for inserting bolts 26 as connection means 11 and 12 are embedded in both ends of the side wall. Both connecting means 11 and 12 are provided at fixed positions, that is, at positions where the end portions of the adjacent unit bodies 10 and 10 are in contact with each other and the distance between the holes is minimized when they are connected. Instead of the nut 27, the bolt 26 may be embedded and finally the nut 27 may be tightened.

A connector main body 20 for connecting adjacent unit bodies 10 and 10 is made of an elongated plate-shaped rigid material, and has two bolt holes 2 adapted to the distance between the connecting means 11 and 12.
1 and 22 are provided on both sides of the elongated member. Bolt hole 2
At least one 22 of the first and the second 22 is the adjacent unit body 10, 1
It is formed in a long hole extending in the juxtaposed direction so that the end portions of 0 can be closely contacted and the bolting work can be facilitated. In addition, the connector main body 20 of the embodiment is robustly formed of a metal material such as a thick iron piece.

The engaging portion 23 is formed by regularly forming irregularities on the outer surface of the connector main body 20, that is, the surface (that is, one surface) that comes to the outside when it is applied to the side surface of the unit body. The engagement portion 23 may be a linear shape that runs in a direction orthogonal to the direction in which the bolt holes 21 and 22 are arranged side by side. Although the engaging portions 23 are provided only on the left and right bolt holes 21 and 22 (see FIG. 2), they may be formed on the entire surface. It is easy to manufacture the uneven cross-sectional shape in a sawtooth shape. However, the engaging portion 23 may have a cross-sectional shape in which the position can be adjusted by continuously shifting it, and it may have a linear cross shape or a wavy shape in plan view.

An engagement partner made of unevenness capable of engaging with the engagement portion 23 is formed on one surface of a washer 25 corresponding to a washer. The washer 25 has a size that at least partially closes the bolt holes 21 and 22, and has a through hole 29 for inserting the bolt formed at the center. Further, the washer 25 is in contact with the engaging portion 23 of the connector main body 10 with a sufficient width, and the contacting surface is provided with an engaging partner 24 having unevenness capable of engaging with the unevenness. (FIGS. 3 and 4).

This washer 25 is also made of a rigid metal material. However, although it is a desirable condition to be made of metal, it is not indispensable, and resins can be used as long as they can withstand bolting. This also applies to the connector body 20. Further, it may be formed by mixing or combining different kinds of materials.

In the connecting device of the first example constructed as described above, the end portions of the adjacent unit bodies 10 are in contact with each other, and the bolts of the connecting body 20 are connected to the connecting means 11 and 12 which are open near the respective end portions. A washer 25 is arranged so that the holes 21 and 22 are aligned with each other, the engaging portion 23 of the connector main body 20 faces toward the outer surface, and the engaging partner 24 engages with the engaging portion 23. Screw in loosely, then tighten the bolts and nuts 26, 27 on one bolt hole 21 side first, then confirm that both units 10, 10 are in close contact, and then tighten the other bolt hole 22. Tighten the bolts and nuts 26, 27 on the side of the
4 and 4 are engaged and connected.

FIGS. 5 and 6 show an example in which the unit body 10 is a concrete U-shaped groove forming an open channel.

In this second example, a through hole is formed in the end side wall of the unit body 10 so that a normal bolt 26 is used,
The connection means 11 and 12 are used. Unlike embedded nuts and embedded bolts, since they are not integrated with the unit body 10, it is advisable to use two sets of connecting tools so that the side walls of the unit body 10 are sandwiched from both inside and outside. Therefore, pass the bolt 26 through the through hole,
Other than tightening with the nut 27, it is the same as the first example, so the reference numerals are used and the detailed description is omitted.

In the case of the second example, since the gap between the hole wall of the through hole (11, 12) and the bolt 26 cannot be ignored, the usual bolt tightening inevitably causes a play between the unit bodies 10, 10. Like In order to prevent this, in the present invention, the bolt 26 is biased so as to come into close contact with the hole wall of the through hole near the end of the unit body, and in that state, the engaging portion 23 and the mating member 24 mesh with each other. Also, rattling may occur between the washer 25 and the nut 27 or the bolt head, but this can also be solved by biasing the washer 25 as described above.

In each of the drawings, 27 is a nut screwed to the bolt 26 or a member having the same screwing effect as the nut. Further, the unit bodies 10 may have stepped ends 28 so as to be fitted together (see FIG. 6).

In the case of the above-mentioned second example, the connector main bodies 20 are respectively applied to the connecting means 11 and 12 formed on the side wall of the U-shaped groove from both inner and outer surfaces, and the engaging mates 24 are engaged with the respective engaging portions 23.
Then, washers 25 are overlapped with each other, bolts 26, 26 are respectively passed through them, and a nut 27 is tightened on the opposite side.

[0018]

The engagement portion 24 of the washer 25 engages with the engagement partner 23 of the connector main body 25 by the unevenness. Therefore, even if an external force is applied to the bolt holes 21 and 22 in the juxtaposed direction, the washer 25
Since there is no displacement, the adjacent unit bodies 10 and 10 can be firmly connected by the tightening force of the bolt.
When only one of the bolt holes 21 and 22 is a long hole, the bolt of the bolt hole of the other circular hole is first tightened, and then the unit bodies 10 and 10 are tightened in close contact with each other within the range of the long hole. .

[0019]

Since the present invention is constructed and operates as described above, the engaging portion 2 on the outer surface (one surface) of the connector main body 20.
3 and the mating partner 24 on the contact surface of the washer 25 that is in contact therewith are prevented from shifting in the direction intersecting with the engaging direction, so that the adjacent unit bodies 10 and 10 are securely coupled. There is an effect that can be.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a concrete product connecting apparatus according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged view of a main part of the same.

FIG. 4 is a plan view of the same portion.

FIG. 5 is a perspective view showing a second embodiment of the device according to the present invention.

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

Claims (4)

(57) [Claims] 1. A device for connecting a concrete unit body 10 forming a groove, an underdrain or the like, which is a unit body 10.
The connecting means 11, 12 consisting of embedded nuts, embedded bolts, or insertion holes for bolts are provided on the side surfaces of both ends of the two, and two bolt holes adapted to the space between the connecting means 11, 12 of the adjacent unit bodies 10, 10. 21 and 22 are connection tool main body 20
And at least one of the bolt holes is formed in a long hole extending in the juxtaposed direction, and the connecting portion main body 20 is provided with an engagement portion 23 formed of regular irregularities in a direction intersecting the juxtaposed direction. A bolt that is formed on the outer surface of the washer 25 and is formed on the washer 25 that is in contact with the outer surface of the connector body 20 and that is engageable with the above-mentioned unevenness and that is passed through the bolt holes 21, 22 and the through hole 29 of the washer 25. The engaging portion 2 is tightened by tightening the screw 26 and the nut 27.
3. A concrete product connecting device, characterized in that the engaging member 3 and the mating partner 24 are engaged with each other to prevent deviation. 2. A nut 27 as the connecting means 11, 12.
The concrete product connection device according to claim 1, wherein the connection part is embedded in an end side wall of the unit body. 3. The two bolt holes (21, 22) are both elongated holes elongated in the parallel direction, and are connected as bolts (26) to holes that penetrate through the side wall of the unit body (10) as connecting means (11, 12). The concrete product connection device according to claim 1, wherein the tool body 20 is movable. 4. The concrete product connecting device according to claim 1, wherein the engaging portion 23 is composed of a large number of linear irregularities which are regularly formed in a direction orthogonal to the direction in which the bolt holes 21 and 22 are arranged in parallel. .