JPS6312985B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a concrete product in which a connecting tool is buried, and more particularly, a receiving member, which is one side of the connecting tool, is opened in the connecting surface and is buried, and The present invention relates to a concrete product that is easy to construct and whose connection parts have excellent durability.

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 connection 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, it is necessary to tighten each bolt at the construction site, and the positions of the holes in the connection plate and the positions of the nuts do not easily match, which not only takes time and effort, but also requires a spanner to tighten the bolts. Tools often get 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, reducing durability. It has the disadvantage of being inferior in gender.

The present invention has been made in view of the above-mentioned drawbacks, and its purpose is to provide a connected device that is easy to construct and does not lose its durability even after many years of use. The concrete product is provided with a receiving member that is formed of a cylindrical body with one end closed, and the inner peripheral surface following the open end is widened in the middle to form a stepped part, and the receiving member is attached to the connecting surface. It is made by opening and burying multiple pieces.
A connecting member, which is formed on both end circumferential surfaces so that engaging protrusions that engage with the step portion have elasticity and can be freely contracted in width, extends between the receiving members of the concrete products to be connected. This is a place where a connecting device is buried, which is characterized by being inserted into the device and fixedly connected.

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

1 is a concrete product, and 1a is its connection surface.

Reference numeral 2 denotes a receiving member that is integrally molded with an opening on the connecting surface 1a. This receiving member 2 is formed of a cylindrical body with one end closed, and the inner peripheral surface thereof is widened at a predetermined position from the open end to form a stepped portion 2a. This widened inner peripheral surface has a shape that is narrowed toward the bottom surface. Moreover, the outer peripheral surface shape of the receiving member 2 is
It has a shape that follows the shape of its inner peripheral surface, and its stepped portion 2b serves to prevent the receiving member 2 from coming off.

3 is a connecting member, and the shape of its body 3a is as follows:
It has a shape that fits into the inner circumferential surface of the opening end of the receiving member 2, and an umbrella-shaped head 3b that narrows toward the tip is formed at both ends. The size of the tip of this head 3b is smaller than the opening of the receiving member 2, and the base end, which is the engaging protrusion 3c, is formed larger than that, and furthermore, the head 3b has elasticity. A slot 3d is formed in the axial direction to reduce the diameter. Also, the width of the slot 3d is the head 3a.
The maximum size of the head 3a is made smaller than the opening of the receiving member 2 when the diameter of the head 3a is reduced.

In addition, when the shape of the opening surface of the receiving member 2 is square, the shape of the body 3a of the connecting member 3 is a square column as shown in FIG.
is formed only on the opposing side surface, and the receiving member 2
When the opening surface shape is round, as shown in FIG. 3, it is formed of a round bar, and the slot 3d thereof is formed in a cross shape.

Furthermore, the engaging protrusion 3c is not limited to the one described above, but may be attached to other structures such as a plate spring (not shown) that protrudes from the circumferential surface so that it sinks inward when the plate spring (not shown) is pressed. You may.

Furthermore, if the surface of the receiving member 2 is roughened, the receiving member 2 and the concrete product will come into close contact with each other.

Next, a method of connecting the concrete products 1 in which the receiving members are buried respectively is explained. The connecting surfaces of the concrete products 1 to be connected are faced to each other, and the connecting member 3 is placed on one of the concrete products in advance.
is engaged with the receiving member 2, and when both concrete products 1 are brought together, the head 3a of the connecting member 3
The engaging protrusions 3c engage with the step portions 2a of the respective receiving members 2, and both concrete products 1 are connected. Thereafter, the joints left between the connecting surfaces of both concrete products 1 are filled with a joint material such as mortar, and the connection work is completed.

Note that the engagement of the connecting member 3 to one of the concrete products 1 may be performed at the construction site, or may be performed at a factory where the concrete product 1 is formed.
This can be done as appropriate depending on the situation at the construction site.

In this way, according to the present invention, when connecting concrete products, the two concrete products are connected and fixed by simply placing them between the receiving members facing the connecting member and abutting the two concrete products. The work becomes extremely easy and the work time can also be shortened.

Furthermore, since the connecting members are buried within the concrete product, they will not corrode even if they are made of iron, and the connection points will be highly durable even after many years of use. can be played.

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]

FIG. 1 is a sectional view showing a state in which concrete products according to the present invention are connected, and FIGS. 2 and 3 are perspective views of a connecting member. 1... Concrete product, 1a... Connection surface, 2
...Receiving member, 2a, 2b...Stepped portion, 3...Connecting member, 3a...Body, 3b...Head, 3c...Engagement protrusion, 3d...Slot.

Claims (1)

[Claims] 1. It is formed of a cylindrical body with one end closed, and the inner peripheral surface following the open end is widened in the middle to form a stepped part. A plurality of receiving members are opened in the connecting surface and buried, and both ends are closed. A connecting member formed on a circumferential surface so that an engaging protrusion that engages with the stepped portion has elasticity and can be freely contracted in width extends between the receiving members of the concrete products to be connected. A concrete product embedded with a connecting tool that is inserted and connected and fixed.