JPS6312982B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for connecting concrete products and a connecting tool for concrete products. The present invention relates to a method for connecting concrete products that can be fitted into a concrete product and fixed therein to reliably prevent water leakage at the connection point, and a connecting tool used therefor.

Conventionally, the method of connecting concrete products such as U-shaped blocks used as drainage channels involves laying each concrete product with a slight gap left between the connecting surfaces, and filling this gap with a joint material such as mortar. There is something. In this method, the positioning of each concrete product is not accurate and the strength of the joints is not sufficient.

There is also a method in which a step is formed so that the inner peripheral surface of one end of the concrete product has the same shape as the outer peripheral surface of the other end, and each concrete product is overlapped at this step and connected and fixed with joint material. According to this, although there is an advantage that positioning can be performed accurately and easily and there is no deviation in the left-right direction, there is a disadvantage that the strength against deviation in the vertical direction or the front-back direction is not sufficient.

Furthermore, there is a method of embedding a nut in the outer wall surface near the connecting surface of the concrete, inserting a bolt through a connecting plate extending between the two concrete products, screwing it into the nut, and filling the joint with a joint material to connect. This is strong enough, but the bolts must be installed one by one at the construction site, and the positions of the holes in the connection plate and the nuts do not easily match, which not only takes time and effort, but also makes it difficult to install the bolts. Tools such as spanners are often lost, and connecting plates and bolts, which are generally made of iron, are exposed to the outer surface of concrete products, so they corrode over a long period of time. It has the disadvantage of being inferior in durability.

Furthermore, according to the conventional connection method, the adhesion between the joint material and the concrete product may be insufficient, and water leakage from the connection location cannot be reliably prevented.

In addition to mortar, elastic materials have also been used as joint materials, which are clamped between connecting surfaces to prevent water leakage. Therefore, it was not possible to securely prevent water leakage with superior durability.

The present invention has been made in view of the above-mentioned drawbacks, and its purpose is to fit and fix a connecting member having a shape that follows the shape of the connecting surfaces when connecting both concrete products into the opposing connecting surfaces. To provide a method for connecting concrete products and a connecting tool used therein, which allows the connection work to be carried out in a short time and is easy, and which is highly durable and can reliably prevent water leakage at the connection point. The feature is that the receiving member, which has a groove formed on the end face that follows the shape of the connecting surface of the concrete products, is opened and buried at a position opposite to the connecting surface of each concrete product to be connected. Further, when a concrete product having a plurality of holes penetrating the wall opposite the groove of the receiving member on the outer wall surface is butted with their connecting surfaces facing each other, the cross-sectional shape is shaped to fit into the groove of the receiving member. A connecting member having through holes formed in the circumferential surface near both ends at positions corresponding to the holes penetrating the groove is inserted between the opposing receiving members, and each through hole of the connecting member is inserted into the connecting member. Both concrete products are fixed by aligning each hole penetrating the groove with a fixing member inserted through the hole opening in the outer wall surface, and
A groove with a shape that follows the shape of the connecting surface of the concrete product is formed on the end face, and through holes are drilled at multiple locations through the opposing wall of the groove, and the groove opens on the connecting surface of the concrete product. At the same time, a hole is opened in the outer wall surface of the concrete product so that the through hole and the axis thereof coincide with each other and communicate with each other, and a receiving member buried in the concrete product is opened in the connection surface of both concrete products to be connected. a connecting member that is fitted over the entirety of the groove and has through holes drilled in its peripheral surface that match the respective through holes of the receiving member in both concrete products, and a connecting member that is fitted into the groove of the receiving member The fixing member is inserted through the through hole of the connecting member and the through hole of the receiving member to engage them.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a concrete product having a rectangular cross section, and a receiving member 2 is embedded in the connecting surface thereof over the entire circumference of the connecting surface. 3 is a connecting member fitted into the receiving member 2.

As shown in FIG. 2, the receiving member 2 has a rectangular cylindrical shape that follows the shape of the connecting surface, and a groove 2a that is open at one end surface and closed at the other end surface is formed in its thick part. . Further, the receiving member 2 is provided with a plurality of through holes 2a (eight locations in the illustrated example) that pass through the opposing wall of the groove 2a.

As shown in FIG. 3, the shape of the receiving member 2 may be such that the portion where the through hole 2b is formed projects toward the closed end side of the groove 2a. This is done by engaging the protrusions provided on the formwork with the protrusions when embedding the receiving member 2 in the concrete product 1.
This is to ensure accurate positioning of the receiving member. Furthermore, if a cap nut 2c is welded to the outer surface of the closed end of the groove 2a as shown in FIG. By tightening the bolts and pulling the bolts out of the formwork, the end face of the receiving member 2 can be brought into close contact with the formwork surface, and the inflow of cement material into the receiving member 2 can be prevented. can.

In addition, the outer surface of the receiving member 2 may be made rough, or
Alternatively, if an appropriate protrusion is provided, the receiving member 2
will be firmly buried within the concrete product 1.

The connecting member 3 is a cylindrical body shaped to be fitted into the groove 2a, and its total length is approximately 2 times the depth of the groove 2a.
It's double. In addition, through holes 3a are formed in the circumferential surface near both ends of the connecting member 3 at positions whose axes coincide with the through holes 2b when the connecting member 3 is inserted into the receiving member 2. The interval between the through holes 3a in the axial direction of the connecting member 3 is the same as the interval between the through holes 2b of the opposing receiving member 2 when both concrete products 1 are faced with a gap of about 10 mm between their connecting surfaces. Moreover, by making the through hole 3a a long hole, it becomes easy to match with the through hole 2a. The surface of the portion exposed between the connecting surfaces is rough so that mortar as a joint material will adhere tightly.

In addition, when the shape of the receiving member 2 is the shape shown in the above-mentioned FIG.
A will be drilled.

Reference numeral 4 denotes a fixing member, which is formed of a round bar so as to protrude from the opposite wall of the groove 2a and be inserted through the through hole 2b. It is inserted through the open blind hole 4a and passes through both the through hole 2b and the through hole 3a.

Note that the receiving member 2 is similarly buried in the other concrete product 1 to be connected to the concrete product 1, and a blind hole 4a is formed.

As shown in FIG.
The other concrete product 1 is inserted into the connecting member 3 protruding from the connecting surface and its receiving member 2 is inserted into the connecting member 3.
If both concrete products 1 are brought together and butted against each other, both concrete products 1 are temporarily fixed without shifting from each other.

Next, as shown in FIG. 5, the fixing member 4 is inserted through the blind hole 4a, passes through both the through hole 2b and the through hole 3a, and the blind hole 4a left in the head of the fixing member 4 is closed. Fill with mortar 5 to ensure that both concrete products are fixed.

After that, the gap left between both concrete products 1 is filled with a joint material such as mortar.

Note that the fitting of the connecting member 3 to one of the concrete products 1 may be performed in advance at a location other than the construction site, and may be appropriately selected depending on the situation at the site.

Further, although not shown, if a packing is provided on the bottom of the groove 2a and the end face of the connecting member 3 is pressed against the packing, water leakage at this connection point can be completely prevented.

In this way, according to the present invention, the connecting surfaces of both concrete products to be connected are faced to each other, and the connecting member is inserted between the receiving members buried in the connecting surfaces and abutted against each other. The concrete products are temporarily fixed to each other in accurate positions, and by simply inserting the fixing member and sewing together the connecting member, the receiving member, and the concrete product, both concrete products are securely fixed.The construction is easy and the construction time is short. Furthermore, even if the receiving members, connecting members, and fixing members are made of iron, they will be buried in concrete and will not corrode, so even after many years of use, No reduction in strength.

Furthermore, the entire connecting part is covered with the connecting member, and this connecting member is fitted and fixed within the connecting surface of the concrete product, so when this is used for drainage channels, etc., it is possible to prevent water leakage at the connecting point with durability. It has great effects, such as being able to defeat and reliably stop the attack.

Although the present invention has been variously explained above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

[Brief explanation of the drawing]

Figure 1 is a perspective view of concrete products, connecting members, and fixing members used in the connection method of the present invention;
Figure a is a side view of the receiving member, b is its AA sectional view,
Figure 3a is a side view showing another example of the receiving member, b is its BB sectional view, Figure 4a is a bottom view of the receiving member, b
Figure 5a is a side view showing the state in which the concrete products are connected, and Figure 5b is its D-D cross-sectional view.
FIG. 1... Concrete product, 2... Receiving member, 2a
... Groove, 2b... Through hole, 2c... Cap nut, 3...
...Connection member, 3a...Through hole, 4...Fixing member, 4
a...blind hole, 5...mortar.

Claims (1)

[Scope of Claims] 1. A receiving member having a groove formed in its end face that follows the shape of the connecting surfaces of the concrete products is opened and buried at a position opposite to each connecting surface of the concrete products to be connected, Further, when a concrete product having a plurality of holes penetrating the wall opposite the groove of the receiving member on the outer wall surface is butted with their connecting surfaces facing each other, the cross-sectional shape is shaped to fit into the groove of the receiving member. A connecting member having through holes formed in the circumferential surface near both ends in positions corresponding to the holes passing through the groove is inserted between the opposing receiving members, and each through hole of the connecting member and the above A method for connecting concrete products, characterized in that both concrete products are fixed by aligning each hole penetrating the groove with a fixing member inserted through the hole opening in the outer wall surface. 2 A groove with a shape that follows the shape of the connecting surface of the concrete product is formed on the end face, and through holes are drilled at multiple locations through the opposing wall of the groove, and the groove opens on the connecting surface of the concrete product. At the same time, a receiving member buried in the concrete product is opened in the outer wall surface of the concrete product so that a hole communicating with the through hole coincides with the axis, and the connecting surface of both concrete products to be connected. a connecting member that is fitted over the entire opening of the groove and has a through hole drilled in its peripheral surface that matches each of the through holes of the receiving member in both concrete products; and a connecting member that is fitted into the groove of the receiving member. A connecting tool for a concrete product, comprising a fixing member that is inserted through a through hole of the connecting member and a through hole of the receiving member to engage them.