JPH035284B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for burying a connection receiving member for a concrete product, and more specifically, a through hole is bored facing the peripheral surface, The present invention relates to a method of embedding a cylindrical receiving member into which a connecting member is inserted during connection, reliably preventing cement material from flowing into the receiving member.

[Prior art and problems to be solved] Conventionally, concrete products such as U-shaped blocks for forming drainage channels, etc., have nuts buried in the outer wall surface near the connecting surfaces, and when connecting, both blocks are connected. Both concrete products were fixed by inserting bolts into the connecting plates between them and tightening the bolt nuts.

However, when making this connection, each bolt must be tightened at the construction site, and the holes in the connection plate and the positions of the nuts do not match easily, which not only takes time, but also requires tools such as spanners to tighten the bolts. may be lost,
Furthermore, since the connecting plates and bolts, which are generally made of iron, are exposed on the surface of the concrete product, they corrode over a long period of time, resulting in poor durability at the joints.

In order to eliminate the drawbacks of the conventional connections, the present invention has been developed by burying a receiving member with an opening in the connecting surface, and creating a receiving member with an opening facing the connecting surface of concrete products to be connected. A connecting method has been invented in which a connecting member is inserted between the members, and the receiving member and the connecting member are sewn together with a fixing member as appropriate to connect and fix both concrete products. With this connection method, the two concrete products can be easily positioned by simply butting the connection surfaces together, and this fixation is also simple as there is no need to tighten bolts. Since the members and fixing members are embedded in the concrete product, they do not corrode and have excellent durability.

The present invention is a receiving member to be buried in a particularly large concrete product, and is suitable for burying a heavy item, and it fixes the receiving member in an accurate position and prevents the flow of cement material into the interior of the receiving member. It is an object of the present invention to provide a method for embedding a receiving member that can reliably prevent solidification and also allow easy attachment of the receiving member to a mold.

[Means for Solving the Problems] In order to achieve the above object, the present invention has the following features.

A cylindrical receiving member 2 in which a through hole 2a is bored facing the circumferential surface is opened and buried in the connection surface of the concrete product 1, and a blind hole 4a whose axis coincides with the through hole 2a is inserted into the concrete. In order to form an opening on the outer wall surface of the product 1, a mold plate 6 forming the connection surface of the concrete product 1 has a shape that is the same as the inside shape of the open end of the receiving member 2, corresponding to the buried position of the receiving member 2. A support member 9 is provided with a through hole 6a, and a through hole 9a is bored in the circumferential surface of one end thereof.The support member 9 is inserted through the through hole 6a so that the through hole 9a is located within the formwork, and protrudes into the formwork. The support member 9 that has become a thing
The receiving member 2 is inserted into the receiving member 2, and the molding member 11 that forms the blind hole 4a opening in the outer wall surface of the concrete product 1 is inserted from the template 7 that forms the outer wall surface of the concrete product 1. Through-hole 2a and through-hole 9a of the support member 9
After that, the support member 9 is provided at a protrusion from the outer surface of the template 6 and acts to press the template 6 from the outside and pull out the support member 9 from within the mold. The pressing means is operated to bring the end face of the receiving member 2 into close contact with the inner surface of the mold plate 6, and then concrete material is filled into the mold, and after the cement has solidified, the pressing means is loosened to separate the mold member 11 and the supporting member 9. Pull out the template 6,
7 can be removed.

[Examples] Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings.

First, to explain the concrete product in which the receiving member is buried and the method of connecting it, in Fig. 1,
Reference numeral 1 denotes a U-shaped block, and two receiving members 2 are buried in openings in the connection surface of the U-shaped block 1. 3 is a connecting member fitted into the receiving member 2.

As shown in FIG. 2, the receiving member 2 is formed of a rectangular tube with one end closed, and a through hole 2a is formed opposite to the peripheral wall near the closed end. Note that if the outer surface is roughened or provided with protrusions, the adhesion to concrete will be more reliable.

The overall length of the connecting member 3 is approximately twice the depth of the receiving member 2, and its cross-sectional shape is large enough to fit into the receiving member 2 without play. 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 2a when the connecting member 3 is inserted into the receiving member 2.

The distance between the through holes 3a is the distance between the through holes 2a of the opposing receiving members 2 when the U-shaped blocks 1, 1 are faced with a gap of about 10 mm between their connecting surfaces. Furthermore, by making the through hole 3a a long hole, it is easy to match it with the through hole 2a.

Reference numeral 4 denotes a fixing member, which is formed of a round bar that protrudes from both sides of the receiving member 2 and is inserted through the through hole 2a. It is inserted through a blind hole 4a that opens accordingly, and passes through both the through hole 2a and the through hole 3a.

In addition, other U blocks to be connected to U-block 1
Similarly, in the block 1, a receiving member 2 is buried at an opposing position, and a blind hole 4a is formed.

As shown in FIG. 3, when the two U-shaped blocks 1, 1 are butted against each other with their connection surfaces facing each other, the connecting member 3 is fitted into the receiving member 2 of one of the U-shaped blocks 1 in advance. Then, by aligning the receiving member 2 of the other U-shaped block 1 with the connecting member 3 protruding from the connecting surface and butting both U-shaped blocks together, both blocks 1 and 1 will be temporarily fixed without shifting from each other. .

Next, as shown in FIG. 4, the fixing member 4 is inserted through the blind hole 4a, passes through both the through holes 2a and 3a, and the blind hole 4a left in the head of the fixing member 4 is filled with mortar. 5, and both U-shaped blocks 1, 1 are securely fixed.

After that, the gap left between the two U-shaped blocks 1, 1 is filled with the joint material of the mortar head.

The fixing of the connecting member 3 to one of the U-shaped blocks 1 may be done in advance at a location other than the construction site, and can be done as appropriate depending on the situation at the site.

Next, the method of burying the receiving member 2 will be explained with reference to FIG. 5, which shows the formwork for forming concrete products seen from above. 6 is the formwork that forms the connection surface of the U-shaped block 1, and 7 is the outer surface. It is a template for forming. 8 is U
This is a template for forming a letter-shaped inner wall surface.

A through hole 6a having the same shape as the opening surface of the receiving member 2 is formed in the template 6, and a guide frame 6b is projected onto the outer surface of the template with its axis aligned with the through hole 6a.

Reference numeral 9 denotes a support member, one end of which is shaped to fit into the receiving member 2, and the receiving member 2 is attached to the peripheral surface of this one end.
A through hole 9a whose center coincides with the through hole 2a is bored. Further, a threaded portion 9 is provided on the peripheral surface of the other end of the support member 9.
b is formed. Note that the screw of this threaded portion 9b does not need to be carved all over the circumference of the support member 9, but as shown in FIG. will be formed. Note that by making the through hole 9a a long hole or the like, it becomes easy to insert a mold member, which will be described later.

Reference numeral 10 denotes a handle that is rotatably screwed into the threaded portion 9b of the support member 9. Note that the threaded portion 9b and the handle 10 form a pressing means.

On the other hand, in the template 7, when the axes of the receiving member 2 and the guide frame 6b are aligned and the end face of the receiving member 2 is brought into contact with the inner wall surface of the template 6, the through hole 2a of the receiving member 2 and the axis A through hole 7a whose centers coincide with each other is bored, and this through hole 7
A nut 7b is welded to the outer surface with its center aligned with a.

Reference numeral 11 denotes a bolt, which is a molded member, and has a screw carved into the base only to be screwed into the nut 7b, and its diameter is large enough to tightly fit through the through hole 2a.

Then, the support member 9 is inserted through the guide frame 6b so that its through hole 9a is inside the form, the receiving member 2 is fitted into the support member 9 protruding into the form, and the bolt 11 is inserted into the through hole. 7a, the receiving member 2 and the supporting member 9 are fixed to each other by passing through the through hole 2a and the through hole 9a, and the bolt 11 is inserted into the nut 7b.
When the handle 10 screwed into the threaded part 9b is rotated, the end face of the handle 10 presses the end face of the guide frame 6b, and thereby the support member 9 is pulled outward from the form frame. The receiving member 2, which is fixed to the supporting member 9 with bolts 11, is fixed with its end surface brought into close contact with the inner circumferential surface of the template 6.

After that, cement material is filled into the formwork,
After solidification, the handle 10 is rotated in the opposite direction to loosen the pressure, the bolts 11 and the support member 9 are extracted, and the formwork is removed. A blind hole 4a connected to the through hole 2a of the receiving member 2 is formed on the outer surface of the block 1.

Note that the pressing means is not limited to the above-described configuration of the handle 10 and the threaded portion 9b, but may include other means,
For example, a lever crank mechanism (not shown) or the like may be provided on the support member 9.

[Effects of the Invention] According to the present invention, since the receiving member and the supporting member are fixed to each other using a mold member for forming a blind hole opening in the outer wall surface of the concrete product, the receiving member can be easily attached to the formwork in a short time, and the receiving member can be positioned at an accurate position.Furthermore, since the end face of the receiving member is brought into close contact with the template using a pressing means, This has remarkable effects such as being able to reliably prevent cement from flowing into the receiving member and solidifying.

[Brief explanation of drawings]

Figure 1 is a perspective view of concrete products, connecting members and fixing members used for connection, Figure 2 a
is a side view of the receiving member, Fig. 2b is its A-A cross-sectional view, Fig. 3 is a side view showing the connection state of the concrete product, Fig. 4 is a B-B cross-sectional view of Fig. 3, and Fig. 5 6 is a plan view showing the embedding method according to the present invention, and FIG. 6 is a perspective view of the support member. 1... U-shaped block, 2... Receiving member, 2a...
Through hole, 3...Connecting member, 3a...Through hole, 4...Fixing member, 4a...Blind hole, 5...Mortar, 6...
Template, 6a... Through hole, 6b... Guide frame, 7... Template, 7a... Through hole, 7b... Nut, 8... Template, 9... Support member, 9a... Through hole, 9b...
Threaded part, 10...handle, 11...bolt.

Claims (1)

[Scope of Claims] 1. A cylindrical receiving member 2 with a through hole 2a formed opposite to the circumferential surface is opened and buried in the connection surface of the concrete product 1, and the through hole 2a and the axis are aligned. In order to form matching blind holes 4a in the outer wall surface of the concrete product 1, an opening in the receiving member 2 is formed in the template 6 forming the connection surface of the concrete product 1 in a manner corresponding to the buried position of the receiving member 2. A through hole 6a having the same shape as the inside shape of the end is provided, and a support member 9 having a through hole 9a bored in the peripheral surface of one end is inserted through the through hole 6a so that the through hole 9a is located within the formwork. , the support member 9 protruding into the formwork;
The receiving member 2 is inserted into the receiving member 2, and the molding member 11 that forms the blind hole 4a opening in the outer wall surface of the concrete product 1 is inserted from the template 7 that forms the outer wall surface of the concrete product 1. through-hole 2a and through-hole 9a of the support member 9
After that, the support member 9 is provided at a protrusion from the outer surface of the template 6 and acts to press the template 6 from the outside and pull out the support member 9 from within the mold. The pressing means is operated to bring the end face of the receiving member 2 into close contact with the inner surface of the mold plate 6, and then concrete material is filled into the mold, and after the cement has solidified, the pressing means is loosened to separate the mold member 11 and the supporting member 9. Pull out the template 6,
A method for burying a receiving member for connecting a concrete product, characterized in that 7 is removed.