JPS6157518B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a concrete product in which a connecting tool is buried, and in particular, a groove having an external shape approximately equal to the connecting end face shape is formed at a constant depth. Concerning concrete products in which a receiving member is buried, a connecting member is inserted between the grooves, making it easy to connect concrete products, and the connection point has excellent durability to reliably prevent water leakage. It is.

[Prior art] Conventionally, U for connecting to form a drainage channel, etc.
Some concrete products such as block blocks have nuts embedded in the outer wall surface near the connecting end surface.

When making the connection, a bolt is inserted into a connecting plate extending between the two concrete products, and the bolt is tightened to the nut to connect the two concrete products.

According to this method, each bolt must be tightened at the construction site, and the positions of the holes in the connecting plate and the nuts do not easily match, which not only takes time and effort, but also requires the use of spanners, etc., to tighten the bolts. Tools are often lost, and
Connection plates and bolts are generally made of iron,
Since it is exposed on the outer surface of concrete products, it corrodes over a long period of time, resulting in poor durability.

Furthermore, when the conventional concrete products are used, the adhesion between the joint material and the concrete product may be insufficient, making it impossible to reliably prevent water leakage from the joints.

In addition to mortar, elastic members have also been used as joint materials to prevent water leakage by squeezing them between the connecting end faces, but this method is not effective in terms of the durability of the joint material. However, it was not possible to reliably prevent water leakage due to its excellent durability.

[Purpose of the Invention] The present invention was devised in view of the above-mentioned drawbacks of the conventional art, and its purpose is to provide extremely easy construction, and to avoid loss of durability even after long-term use. To provide a concrete product in which a connecting tool is embedded, which can reliably prevent water leakage from a connecting point even when used in a drainage channel or the like.

[Structure of the Invention] A concrete product in which a connecting tool according to the present invention is embedded has a groove having a constant depth and an outer shape that is approximately the same as the shape of the connecting end face of the concrete product, and an opposing wall forming this groove. A receiving member having a plurality of penetrating holes drilled therein is buried in the connecting end surface of the concrete product so that the opening end surface of the groove is flush with the connecting end surface of the concrete product, while a receiving member is buried in the outer wall surface near the connecting end surface of the concrete product. is formed by opening a hole that communicates with the through hole, the axis of which coincides with the through hole, and has a shape that fits into the entire groove of the receiving member, and has a position facing the through hole on the circumferential surface of both ends. A connecting member in which the same number of through holes are drilled is inserted between the grooves of the receiving members of both concrete products to be connected, and a fixing member is inserted through the hole opening in the outer wall surface, The receiving member and the connecting member are connected and fixed by penetrating their respective through holes, and the inserted fixing member is filled with mortar to finish the exterior.

[Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described in detail based on 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 end surface thereof over the entire circumference of the connecting end surface.

Reference numeral 3 indicates a connecting member fitted into the receiving member 2.

As shown in FIG. 2, the receiving member 2 has a rectangular cylindrical shape with an outer shape that is approximately the same as the connecting end surface shape, and a groove 2a that is open at one end surface and closed at the other end surface has a certain depth in its thick part. It is formed with a

Further, the receiving member 2 is provided with a plurality of through holes 2b (eight locations in the illustrated example) that penetrate through the opposing wall of the groove 2a near the closed end side of the groove 2a.

As shown in FIG. 3, the shape of the receiving member 2 is as shown in FIG.
It may be made to protrude toward the closed end side. When the receiving member 2 is buried in the concrete product 1, the position of the receiving member 2 is made accurate by engaging a projection provided on the formwork with the projection.

In addition, if a cap nut 2c is welded to the outer surface of the closed end of the groove 2a as shown in FIG. By screwing them together and pulling the bolts toward the formwork, the end face of the receiving member 2 can be brought into close contact with the formwork surface, and it is possible to prevent the cement material from flowing into the receiving member 2. can.

Furthermore, if the surface of the receiving member 2 is made rough or provided with appropriate protrusions, this will serve as an anchor and the receiving member 2 will be firmly embedded 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.

Further, when the connecting member 3 is fitted into the receiving member 2, the through holes 2 on the outer peripheral surface near both ends of the connecting member 3
A through hole 3a is formed at a position where the axis coincides with b.

The distance between the through holes 3a in the axial direction of the connecting member 3 is the distance between the through holes 2b of the opposing receiving members 2 when both concrete products 1, 1 are faced with a gap of approximately 10 mm between their connecting end surfaces. By making the through hole 3a a long hole, it is easy to match it with the through hole 2a. The surface of the portion exposed between the connecting end surfaces is rough so that the mortar 5 as a joint material adheres closely.

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

Reference numeral 4 designates a fixing member, which is a round bar whose outer peripheral surface is flat so as to protrude from the opposite wall of the groove 2a and pass through the through hole 2b. It is inserted through a blind hole 4a that opens with the same axis, and the through hole 2b and the through hole 3
It will pass through along with a.

Note that a 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. 5a, when the two concrete products 1, 1 are butted together with their connecting end surfaces facing each other, the connecting member 3 is fitted into the receiving member 2 in advance and protrudes from the connecting end surface. Connect the other concrete product 1 to the connecting member 3 with its receiving member 2, and connect both concrete products 1, 1.
If they are brought together, the effect is that both concrete products 1, 1 are temporarily fixed without shifting from each other.

This is also a major feature of the present invention.

Next, the fixing member 4 is inserted through the blind hole 4a as shown in FIG.
Fill with mortar 5 and make both concrete products 1 and 1.
is securely fixed.

Thereafter, the gap left between the two concrete products 1 and 1 is filled with a joint material such as mortar 5.

Furthermore, the connecting member 3 to one concrete product 1
The fitting may be performed in advance at a location other than the construction site, and is selected depending on the site conditions.

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 connecting point can be completely prevented.

[Effect of the invention] The present invention is configured as described above.

According to the present invention, the connecting end 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 end surfaces and abutted against each other, and the two concrete products can be connected to each other. Both concrete products can be reliably installed by simply temporarily fixing them at accurate positions, inserting the fixing member, and sewing together the connecting member, the receiving member, and the concrete product.The construction is easy and the construction time can be shortened. In addition, a receiving member,
Even if the connecting members and fixing members are made of iron,
These are buried in concrete and will not corrode, and their strength will not decrease even after many years of use.

Furthermore, the entire connection is covered with the connecting member, and this connecting member is fitted and fixed within the connecting end surface of the concrete product, so when this is used for drainage channels etc., water leakage at the connection point can be prevented with durability. This results in extremely excellent effects such as excellent and reliable prevention.

Although the present invention has been variously explained above using 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. .

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a concrete product according to the connection method of the invention, and a connecting member and a fixing member used therein, Fig. 2a is a side view of the receiving member, b is a cross-sectional view taken along line A-A thereof, and Fig. 3 a is a side view showing another example of the receiving member, b is a sectional view taken along the line B-B, FIG. 4 a is a bottom view of the receiving member, b is a sectional view taken along the line C-C, and FIG. A side view showing a connected state, and b is a sectional view taken along line DD. 1... Concrete product, 2... Receiving member, 2
a... Groove, 2b... Through hole, 2c... Cap nut, 3
... Connecting member, 3a... Through hole, 4... Connecting member,
4a...Blind hole, 5...Mortar.

Claims (1)

[Scope of Claims] 1. A groove having an external shape approximately equal to the shape of the connecting end face of the concrete product is formed with a certain depth, and through holes are bored at multiple locations through the opposing wall forming the groove. A receiving member is buried in the connecting end surface of the concrete product so that the opening end surface of the groove is flush with the connecting end surface of the concrete product, and a receiving member is buried in the outer wall surface near the connecting end surface of the concrete product so that its axis is aligned with the through hole. It is formed with a communicating hole and has a shape that fits into the entire groove of the receiving member, and the same number of through holes are bored in the circumferential surface of both ends at positions opposite to the through holes. The connecting member is inserted between the grooves of the receiving members of both concrete products to be connected, and the receiving member and the connecting member are connected to each other by a fixing member inserted through a hole opened in the outer wall surface. A concrete product in which a connecting device is embedded, characterized in that the connecting device is connected and fixed by passing through a through hole, and the inserted fixing member is filled with mortar and finished with an exterior finish.