JP3198254B2 - Method of forming locking space in insertion hole of joint fitting for concrete structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting two concrete structures to be connected via a joint fitting having an insertion portion which can be inserted into an insertion hole formed in a connection surface of the concrete structure and locked. Forming a locking space in an insertion hole of a fitting for a concrete structure, forming a locking space in an insertion hole for locking a claw portion at a tip end of an insertion portion in the fitting. It is about.

[0002]

2. Description of the Related Art Conventionally, for example, the following method is generally known as this kind of forming method. First, a formwork for forming a concrete structure so as to form an insertion hole for inserting an insertion portion of a fitting, and a locking portion for locking a claw formed at a distal end portion of the insertion portion. Inside, a dedicated split mold for forming an insertion hole is assembled. Next, in the mold for forming the concrete structure, a dedicated split mold for forming the insertion hole matching the shape of the insertion hole having the locking portion is incorporated, and then, into the mold for forming the concrete structure. Pour concrete. Then, after the concrete has hardened, by disassembling and removing the dedicated split formwork, a portion where the concrete is prevented from being cast is formed as an insertion hole.

[0003]

However, in the above-described conventional forming method, when a dedicated split mold for forming an insertion hole is incorporated, a locking portion for locking a claw portion of a fitting is locked. In addition, complicated work such as installation of the dedicated split formwork and removal of the dedicated split formwork is required. Therefore, in this conventional forming method, the operation of manufacturing a concrete structure having an insertion hole becomes complicated, and much time is required.

The present invention has been made in view of the above-mentioned circumstances, and has as its object the connection of a concrete structure to a connecting surface.
A joint fitting in a concrete structure insertion hole that can easily and surely form a locking space in which a claw of an insertion part is engaged when forming an insertion hole for inserting an insertion part of the joint fitting. It is an object of the present invention to provide a method of forming a locking space portion for use.

[0005]

In the forming method according to the present invention, first , a locking space forming member formed of a substantially cap-shaped thin-walled frame material is used to form a locking space forming member. A mold is attached to the tip of the insertion hole forming mold, and the insertion hole forming mold is set on a mold (connection surface forming mold) for forming a concrete structure. Pour concrete into

Next, when the poured concrete is hardened, the insertion hole is formed by pulling out the insertion hole forming mold. At this time, the locking space portion forming material is left in the concrete. Then, this locking space forming member, the locking space portion is formed at the distal end of the insertion hole. Thus, the insertion hole provided with the locking space is formed in the connection surface of the concrete structure.

According to such a forming method of the present invention, the use of the locking space portion forming material eliminates the need to install a special mold or the like, and facilitates and surely secures the locking space portion. Can be formed. That is, an insertion hole having a locking space portion can be easily and reliably formed on the connection surface of the concrete structure, and the concrete structure to be connected via the joint fitting having the insertion portion can be easily and reliably formed. Can be manufactured.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a method for forming a space for engaging a fitting in an insertion hole of a concrete structure according to the present invention.

According to the method of the present invention, a fitting 3 having an insertion portion 3a (see FIG. 7 ) having an insertion portion 3a capable of being inserted into and inserted into an insertion hole 2 formed in a connection surface 1a of a concrete structure 1 is provided.
Used to form the locking space 2a in the insertion hole 2 for locking the claw 3b at the tip of the insertion portion 3a in the joint fitting 3 when connecting the two concrete structures 1 to be connected. Things.

First, as shown in FIG. 1, the locking space 2a
A locking space portion forming material 4 having an outer peripheral surface having the same shape as the inner peripheral surface of the outer peripheral surface is provided at a front end portion as a mold for forming the locking space portion 2a in the insertion hole 2. Is formed in the same shape as the inner peripheral surface of the insertion hole 2.
And set <br/> into a mold 6 for forming a concrete structure 1.

In this embodiment, a locking space is formed.
The material 4 has an outer peripheral surface having the same shape as the inner peripheral surface of the locking space 2a.
Composed of a thin-walled frame material 11 formed in a substantially cap shape.
And at the connection surface 1a side of the concrete structure 1
Substantially perforated plate with a through hole 9a on the cap-shaped opening side
It is configured so that the reinforcing metal fitting 9 formed in
Have been.

Then, as shown in FIG.
Penetrates the tip of the insertion hole forming mold 5 into the through hole 9a of the tool 9
The fitting space portion forming material 4 (thin-wall type
Frame material 11) so as to cover the tip of the insertion hole forming mold 5
As well as temporarily fixing the locking space portion forming material 4 (thin
Insert the insertion hole forming mold 5 to which the meat mold material 11) is temporarily fixed
It is set in the mold 6 forming the cleat structure 1.

Next, as shown in FIG.
Concrete 10 cast in formwork 6 forming structure 1
After hardening, the mold 5 for forming the insertion hole is pulled out.
Forming an insertion hole 2 in the connecting surface 1a of the concrete structure 1
I do. At this time, the tip of the insertion hole 2 is left.
The locking space portion forming material 4 (thin-walled frame material 11)
A locking space 2a having a reinforcing metal fitting 9 is formed.
You.

[0014]

[0015]

[0016]

[0017]

[0018]

[0019]

In this way, the insertion hole 2 having the locking space 2a can be formed simply by setting the insertion hole forming mold 5 having the locking space forming material 4 over the tip. Therefore, there is no need to set a special dedicated formwork or use a specific removing means for removing the locking space forming material 4, which can be performed easily and reliably. And this
To the insertion hole 2 formed in the connecting surface 1a of the concrete structure 1,
For example, a joint having a pair of insertion portions 3a as shown in FIG.
Insert the insertion part 3a of the hand fitting 3 and insert the claw 3b.
The joint space is secured by being locked to the locking space 2a in the inlet hole 2.
Fixing the tool 3 and connecting the pair of other insertion portions 3a.
To the insertion hole of the other concrete structure (not shown)
By inserting and fixing, both concrete structures to be connected
So that the structures 1 can be interconnected via fittings 3
Become. Further, by the reinforcing metal fitting 9 for locking, the inside of the insertion hole 2 is inserted.
When the insertion part 3a of the joint fitting 3 is inserted, the claw at the tip thereof
The concrete of the part where the part 3b contacts (see FIG. 7) is supplemented.
The insertion part 3a (joint fitting 3) can be pulled out.
Resistance can be increased.

In the embodiment shown in FIGS. 1 and 2 , the locking space portion forming material 4 composed of a substantially cap-shaped thin-walled frame material 11 is connected to the tip end of the insertion hole forming frame 5. As a means for temporarily fixing to the portion, the above-mentioned reinforcing metal fitting 9 for locking is used, and a locking projection is provided on the outer peripheral surface of the distal end portion of the insertion hole forming mold 5 so as to be able to come into and out of the outer peripheral surface. I'm also using 12. For this reason, the temporary fixing can be more firmly performed, and during the casting of the concrete 10 forming the concrete structure 1, the locking space forming material 4 (thin frame material 11) may come off. Absent.

The locking projection 12 is urged by a spring member 13 as shown in FIG. 3 , and is buried in the outer peripheral surface when pressed, and automatically released when the pressed state is released. It appears outside the outer peripheral surface.

[0023] More specifically this done using the locking projections 12, fixed course of the insertion hole forming mold 5 tip of the locking space forming member 4, as shown in FIG. 4, the insertion hole Forming form 5
The locking projection 12 is one end of deaths during the tip portion when passed through the through hole 9a of the locking metal fitting 9, the passage of the locking metal fitting 9. Thereafter, as shown in FIG. 5 , when the insertion hole forming mold 5 is further inserted, it appears again inside the locking space portion forming material 4 of the locking reinforcing metal member 9. As a result, the locking projection 12 is locked to the reinforcing metal fitting 9 for locking, and
The reinforcing metal 9 (the locking space portion forming material 4) can be temporarily fixed.

It should be noted that the locking space portion forming material 4 composed of the substantially cap-shaped thin-walled frame material 11 is inserted into the insertion hole forming mold 5.
As shown in FIG. 6 , as a means for temporarily fixing to the front end of the mold, an insertion hole forming mold 5 is provided on the side of the cap-shaped opening of the thin form material 11 (the side of the connection surface 1a of the concrete structure 1).
It is also conceivable to form the fitting portion 14 to which the leading end of the insertion hole can be fitted, and fit the leading end of the insertion hole forming mold 5 to the fitting portion 14 of the thin form material 11. Also, this temporary fixing
Considering the case where the reinforcing metal fitting 9 for locking is not provided as in
available.

[0025]

According to the present invention, there is no need to install a special formwork or the like by the locking space portion forming material, and the locking space portion where the claw portion of the fitting fitting insertion portion is locked can be formed. It can be easily and reliably formed in the insertion hole, and the claw portion locking portion can be formed firmly. That is, the insertion hole having the locking space can be easily and reliably formed in the connection surface of the concrete structure. This makes it possible to easily and reliably manufacture a concrete structure having an insertion hole for coupling via a joint fitting having an insertion portion.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a state where an insertion hole is formed in a connecting surface of a concrete structure using a forming method of the present invention.

FIG. 2 is a schematic cross-sectional view showing a step of forming a locking space in an insertion hole using the forming method of the present invention.

FIG. 3 is a schematic cross-sectional view showing a step of forming a locking space in an insertion hole using the forming method of the present invention.

FIG. 4 is a schematic cross-sectional view showing a step of forming a locking space in an insertion hole using the forming method of the present invention.

FIG. 5 is a schematic sectional view showing a step of forming a locking space in an insertion hole using the forming method of the present invention.

FIG. 6 is a schematic cross-sectional view showing another embodiment of a method of temporarily fixing a locking space portion forming material to a tip end portion of an insertion hole forming mold.

FIG. 7 is a schematic cross-sectional view showing a state in which a fitting having a pair of insertion portions is attached to an insertion hole formed by the formation method of the present invention.

[Explanation of symbols]

1: concrete structure, 1a: connecting surface, 2: insertion hole, 2a
… Locking space, 3… joint fitting, 3a… insertion, 3b… claw, 4… locking space forming material, 5… insertion hole forming formwork,
6: Formwork , 9 : Reinforcement metal fitting for locking, 9a: Through hole, 10: Concrete, 11: Thin mold material, 12: Locking projection, 13: Spring member, 14: Fitting portion.

──────────────────────────────────────────────────続 き Continuation of the front page (73) Patent holder 000230010 Geo 2-32-4, Shiba, Minato-ku, Tokyo (73) Patent holder 000112749 Fujimi Engineering Co., Ltd. 3-1-118 Iidabashi, Chiyoda-ku, Tokyo No. (73) Patent holder 000001052 Kubota Co., Ltd. 2-47, Shikitsu-Higashi 1-chome, Namiwa-ku, Osaka-shi, Osaka (72) Inventor Minoru Yamamoto 1-15-2, Tamagawa Gakuen, Machida-shi, Tokyo (72) Inventor Hirohide Hashimoto 2-6-21 Yaesu, Chuo-ku, Tokyo Ishikawashima Building Materials Industry Co., Ltd. (72) Inventor Junichi Tsuzuki 6-30-8, Seijo, Setagaya-ku, Tokyo (72) Inventor Shogo Nagaoka Kita, Setagaya-ku, Tokyo 6-31-27 Karasuyama A-202 (72) Inventor Tadahiro Ocho 1434-75 Irumagawa, Sayama City, Saitama Prefecture (72) Inventor Masayuki Hori 2-25-11 Higashi Abiko, Abiko City, Chiba Prefecture (72) Inventor Masayuki Ki 7-22, Minami-enkajima, Taisho-ku, Osaka-shi, Osaka Inside Kubota Enkajima Plant (56) References JP-A-53-142427 (JP, A) JP-A-52-28515 (JP, A JP, A 60-161109 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B28B 7/20 B28B 7/00

Claims (5)

(57) [Claims] 1. When connecting two concrete structures to be connected via a joint fitting having an insertion portion which can be inserted into an insertion hole formed in a connection surface of the concrete structure and locked therewith, the insertion in the joint fitting is performed. A method for forming a locking space in the insertion hole for locking a claw portion at a tip of the portion, the outer circumference having the same shape as an inner peripheral surface of the locking space in the insertion hole. A locking space portion forming material having a surface is provided at a distal end portion as a mold forming a locking space portion in the insertion hole, and the outer peripheral surface has the same shape as the inner peripheral surface of the insertion hole. The insertion hole forming mold formed is set in a mold forming the concrete structure, and the locking space portion forming material has an outer peripheral surface for the locking.
Substantially cap-shaped thin wall formed in the same shape as the inner peripheral surface of the space
Consists of a form member, the distal end of the insertion hole forming mold frame said locking space forming member
Part, and temporarily hold it.
Insertion hole forming mold with interspace forming material temporarily fixed at the tip
Place the frame in the formwork that forms the concrete structure.
Collected by, and, striking the mold frame which forms the concrete structure
After the concrete has been hardened,
By pulling out the formwork, the concrete structure
An insertion hole is formed in the connecting surface, and the remaining
The locking space portion is formed by the locking space portion forming material.
A method for forming a locking space portion in an insertion hole of a joint fitting for a concrete structure, characterized in that: 2. The method according to claim 2, wherein the mold for forming the insertion hole is provided with the concrete
When setting into the mold for forming the
In the locking space portion forming material provided in
Attach reinforcing metal fittings to the connecting surface side of the cleat structure
When the mold for forming the insertion hole is pulled out,
The reinforcing metal fitting for locking is located on the connection surface side of the locking space portion.
It will be in the state provided, in the joint fitting by the reinforcing metal fitting
The claw portion at the tip of the insertion portion is locked, and the locking space portion is
Forming method of the locking space in the insertion hole of the concrete structure for joint fitting according to claim 1, wherein that you reinforced concrete surface of the connecting surface. 3. The method according to claim 2, wherein the cap is formed of a thin cap-shaped thin frame material.
Tip of the insertion hole forming mold of the locking space forming material
Means for temporarily fixing the cap to the thin-walled form material
Formed into a substantially perforated plate shape with a through hole on the side of the opening
In order to be able to store the reinforcing metal for locking,
End of the insertion hole forming mold into the through hole of the reinforcing metal fitting
Claim 1 also characterized in der Rukoto causing Mate
A method for forming a locking space in an insertion hole of a joint fitting for a concrete structure according to claim 2 . 4. The apparatus according to claim 1, wherein said substantially cap-shaped thin frame material is used.
Tip of the insertion hole forming mold of the locking space forming material
Means for temporarily fixing the cap to the thin-walled form material
The tip of the insertion hole forming frame can be fitted to the opening
Form a fitting part and insert it into the fitting part of this thin form material.
Forming method of the locking space in the insertion hole of claim 1 concrete structures for joint fitting as claimed which is a Rukoto fitted the tip of the forming mold frame. 5. The apparatus according to claim 5, wherein said substantially cap-shaped thin frame material is used.
Tip of the insertion hole forming mold of the locking space forming material
Temporary fixing means to the part, when the tip portion of the insertion hole forming mold, was passed through the through hole of the locking reinforcing bracket provided at the space portion forming member for engaging <br/> locking, the insertion holes A locking projection provided at the tip end of the forming mold so as to be able to move in and out of the outer peripheral surface thereof is buried once when passing through the through-hole, and after passing through, projects again to the locking space side. Accordingly, engaged with the locking projection locking metal fitting according to claim, characterized by comprising temporarily stopping the locking space forming member 1, claim 2 or claim 3
A method for forming a locking space in an insertion hole of the joint fitting for a concrete structure as described in the above.