JPH0941496A - Differential muscle attachment method and hollow type used therefor - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a method by which uneven holes can be easily provided in existing concrete and stably attach a differential bar, and a hollow mold used for the method. To aim. SOLUTION: A hollow mold 1 is formed into an elongated rod shape, and is made hollow by a thin resin. The hollow mold 1 is provided with a tip 2 at one end and a bulge 3 at the other end. This bulge 3 is
A through hole 4 is provided and has an annular shape. On the surface of the hollow mold 1, projecting portions 5 projecting in the circumferential direction are provided at appropriate intervals. Water is enclosed in the hollow inside of the hollow mold 1.
At the time of filling water, an injection hole 6 is opened in the upper part of the bulging portion 3, and after injecting water from the injection hole 6, the periphery of the injection hole 6 can be heated and closed. .
The hollow mold 1 is installed before pouring concrete, and after solidification of the concrete, the hollow mold 1 is pulled up while removing water inside, and a space to be a hole is provided in the existing concrete.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of attaching a differential streak which is attached when an existing portion such as basic concrete and a new portion such as a so-called waist wall provided above the existing portion are connected in a building structure or the like. It relates to a hollow mold used for it.

[0002]

2. Description of the Related Art Conventionally, as a classic one using a differential reinforcement, a differential reinforcement common to the inside of the basic concrete and the inside of the waist wall and the like has been used. Arrange a long streak that protrudes upward from the concrete surface, and after placing the basic concrete, make this streak project from the concrete surface, so that this projecting streak will be buried at a later date. It was designed to have a waist wall. However, when placing foundation concrete, as is well known, the portion that should be the foundation of the building is dug deeply, and a so-called formwork that is configured to surround the periphery of the portion that is to be placed by concrete is provided with a plate material, After the cast concrete has solidified, the formwork is removed and the dug portion is backfilled to the height of the ground surface. Therefore, if the streak protrudes from the surface of the cast concrete during this backfilling work, it will hinder the work. Therefore, it is decided to separate and reinforce the reinforcing bar to be installed when placing the concrete and the reinforcing bar to be installed for the waist wall, etc., and to separate this existing concrete part and the new concrete part. Techniques for making it continuous have been developed. As such a technique, there are a connection tool called an insert and a connection method called a hole-in anchor, and as an improved version of such a connection tool and a connection method, it is practically fair 4-1.
There was No. 6854.

[0003]

However, since each of the above-described connecting tools and connecting methods is performed after placing the existing concrete, the position of the reinforcing bars arranged in the existing concrete is It was unknown, and there was no choice but to set up a differential line at appropriate intervals. Further, the surface of the hole for the reinforcing bar provided in the existing concrete has no unevenness, the tensile strength between the hole and the adhesive is weak, and the attachment state of the reinforcing bar is unstable. In view of the above points, the present invention provides a method capable of easily providing an uneven hole in existing concrete and stably attaching a differential streak, and a hollow mold used in the method. To aim.

[0004]

In order to achieve such an object, the method of the present invention comprises an elongated resin container in which a liquid or gas is sealed in advance at a desired position to which a streak is to be attached before placing concrete. A space is formed by arranging and removing the liquid or gas from the resin container after placing the concrete, and by taking out the container, and after inserting an adhesive into the space, inserting a differential line. The feature is the method of attaching the differential line.

Further, it is preferable that the resin container is a resin container having protrusions at appropriate positions on the surface. Also,
The resin container is preferably made of a flexible and thin resin material, and the adhesive is preferably an adhesive obtained by mixing an epoxy resin and a curing agent. Also,
It is also possible to use mortar as an adhesive.

Further, in the method of the present invention, a liquid or gas is sealed in advance in a resin container which is formed of a flexible resin in a thin and slender shape and has a projecting portion at an appropriate position on the surface, and this is filled before pouring concrete. At the desired position to install the streaks, while removing the liquid or gas from the resin container after placing concrete, a space is formed by taking out the container, and the adhesive is placed in this space. The gist is also a method for attaching a differential muscle, which is characterized in that the differential muscle is inserted after the injection.

On the other hand, the hollow mold of the present invention is characterized in that a liquid or gas is enclosed in a hollow rod-shaped container whose surface is projected at an appropriate position. It is a summary.

In addition, in a hollow rod-shaped container provided with a projecting portion provided at an appropriate position on the surface, a pointed portion provided at one end, and a bulging portion provided at the other end, The gist is a hollow mold used for a method for attaching a differential muscle, which is characterized in that a liquid or a gas is enclosed.

The container is preferably made of a flexible thin resin material, and the bulging portion is
It is preferably an annular bulge having a through hole.

Further, according to the present invention, a projection portion provided at an appropriate position on the surface, a pointed portion provided at one end portion, and an annular bulging portion provided at the other end portion are provided. A gist is a hollow mold used for a differential streak attaching method, which is characterized in that a liquid or gas is enclosed in a hollow rod-shaped container made of a flexible thin resin material.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. First, a hollow type embodiment used for a method of attaching a differential bar will be described. As shown in FIG. 1, the hollow mold 1 is formed into an elongated rod shape, and is made hollow by a thin resin. A tip 2 is provided at one end (lower end in the figure) of the hollow mold 1,
A bulging portion 3 is provided at the other end (upper end in the figure). The bulging portion 3 is provided with a through hole 4 and has an annular shape. In addition, on the surface of the hollow mold 1, protrusions 5 that protrude in the circumferential direction are provided at appropriate intervals. And
Water is enclosed in the hollow inside of the hollow mold 1 so that it is not deformed in concrete. At the time of filling water, an injection hole 6 is opened in the upper part of the bulging portion 3, and after injecting water from the injection hole 6, the periphery of the injection hole 6 can be heated and closed. . The hollow mold 1 having such a structure is used so as to be left in the concrete when the base concrete is poured. Then, after the concrete is solidified, it is pulled out to leave the portion where the hollow mold 1 was present as a hollow. Therefore, the hollow mold 1 is present inside the concrete with the bulging portion 3 on the upper side and the pointed portion 2 on the lower side as in the state of FIG. 1, and the bulging portion 3 is located outside the concrete. It is provided so as to be located. Therefore, when pulling out the hollow mold 1 from the concrete, it can be pulled out by pulling the bulging portion 3, and by providing the pointed portion 2 at the lower end, the corner portion in the lower portion of the hollow mold 1 has an obtuse angle. Since it is configured, the hollow mold 1 is easily peeled off from the concrete.

Next, a description will be given of an embodiment of a method for attaching a differential streak using the above hollow mold. As shown in Fig. 2, horizontal reinforcing bars 6 are placed in the area where the existing concrete should be poured.
A plurality of 0s are laid out, and the position where the stiffener is to be provided is specified before placing the existing concrete, and the horizontal reinforcing bar 60 provided in the frame plates 10 and 13 at that position is specified.
The hollow mold 1 is sandwiched by the sandwiching member 15. At this time, since the hollow mold 1 is sandwiched so as to be orthogonal to the reinforcing bar 60, it will hang down in the vertical direction. And the frame plate 10,
Concrete is poured into the pouring range constituted by 13. At this time, the hollow mold 1 uses the holding material 15 to rebar 6
Since it is firmly sandwiched between the hollow mold 1 and the hollow mold 1, the hollow mold 1 is not easily tilted by the pressure of the concrete. In this way, the concrete is left until it solidifies, and more precisely, until the work of attaching the streak is performed. In this state, as shown in FIG. 3A, only the bulging portion 3 is exposed to the outside of the existing concrete 20, and the bulging portion 3 is used for other work such as backfilling work. Since it is made of resin, it does not cause any problems even if the operator steps on it. Next, the hollow mold 1 is removed from the existing concrete 20. At the time of this removal, as shown in FIG.
Remove the water that is sealed inside. As a result, the hollow mold 1 changes its shape due to a decrease in internal pressure. As shown in FIG. 3B, since the surface of the hollow mold 1 is contracted inward, it can be easily removed by pulling it upward from the bulging portion 3. That is, although the hollow mold 1 is provided with a plurality of protrusions 5, the protrusions 5 cannot maintain the protruding state as described above. Therefore, when the hollow mold 1 is pulled up, the portion that becomes a resistance is successively deformed, so that the outer surface of the hollow mold 1, especially the protruding portion 5 contracts inward, so that the removal can be easily performed. In this way, a space portion 31 is provided in the existing concrete 20 after the hollow mold 1 is removed,
As shown in (b), the hollow portion 31 has the same shape as the hollow mold 1. That is, there is a pointed portion 32 at the lower end, and the existing concrete 2
Within 0, there are portions 35 protruding at appropriate intervals.
Then, as shown in FIG. 4 (a), the mortar 40 is injected into the hollow portion 31 and, as shown in FIG. 4 (b), the differential bar 50 formed by the deformed bar is inserted. By solidifying the mortar 40, the attachment of the differential muscle 50 can be completed. Here, as shown in FIG. 4 (b), the attached differential muscle 50 is solidified with its knuckles meshing with the mortar 40, and
Mortar 40 even between the existing concrete 20
Is filled in the protruding portion 35 and is solidified in a meshed state. As is clear from this, the difference muscle 5
Even if a force is applied to 0 in the direction of pulling out from the existing concrete 20 (upward in the figure), the differential streak 50 does not easily come off.

It goes without saying that various embodiments can be adopted without departing from the spirit of the present invention. For example, as for the attachment method, as shown in FIG. 5, the rod-shaped member 11 is provided in the through hole 4 of the bulging portion 3 of the hollow mold 1 at the upper ends of the frame plates 10 and 13 provided when the existing concrete is poured. It is also possible to hang it while penetrating it, and to embed the hollow mold 1 so that this rod-shaped member 11 is firmly nailed to the frame so as not to move when pouring concrete.

[0014]

[Embodiment] In the above-described method for attaching a differential bar, the hollow portion 31
If an adhesive having a quick-drying property is used in addition to the mortar 40 to be injected into the interior of the concrete, the existing concrete 20 and the differential line 50 can be solidified in a short time. As the adhesive, a mixture of an epoxy resin and a curing agent can be used. When vinyl is used as the material of the hollow mold 1, it is possible to provide the hollow mold 1 which has a small amount of deformation when water is enclosed and has moderate flexibility.

[0015]

As described above, according to the method of the present invention, a slender resin container in which a liquid or a gas is previously sealed is arranged at a desired position where a streak is to be attached before concrete is poured, and concrete is poured. After removing the liquid or gas from the resin container later, a space is formed by taking out the container, and a differential muscle is inserted after injecting an adhesive into the space and then inserting the differential muscle. Since the gist of the above is the gist, it is sufficient to dispose the differential streak at the position where the resin container is removed, so that the position at which the differential streak should be provided becomes obvious. Further, since it is not necessary to drive the anchor like the hole-in anchor, the work is reduced. The resin container reduces the internal pressure by removing the liquid or gas sealed inside, and as a result, deforms the shape of the resin container and facilitates its removal. It can be configured in any shape. That is, by providing a large number of irregularities on the surface, the surface of the hollow portion after the concrete is cast can be made irregular, so that the adhesion between the adhesive and the concrete can be made strong.

If the resin container is a resin container having a projecting portion at an appropriate position on the surface, the above-mentioned unevenness on the surface of the hollow portion after concrete pouring can be provided at an appropriate position. Further, since the resin container is made of a flexible thin resin material, the shape of the resin container can be greatly changed when the liquid or gas sealed in the resin container is removed. The adhesive has no problem as long as it has a sufficient adhesive force, but since the adhesive and the concrete come in contact with each other in an uneven shape as described above, the epoxy resin and the curing agent which have been conventionally used are mixed. It can be sufficiently attached with an adhesive or mortar.

On the other hand, the hollow mold of the present invention is characterized in that a liquid or gas is enclosed in a hollow rod-shaped container in which a proper position on the surface is projected, and the hollow mold is used in the method for attaching a differential streak. As the gist, the hollow mold can be taken out by taking out the liquid or gas in the container, and the hollow part formed when the hollow mold is removed from the solidified concrete is naturally the same as the hollow mold. Since it has a shape, it is possible to accurately provide the minimum required hollow portion for attaching the differential bar.

Further, in a hollow rod-shaped container provided with a projecting portion provided at an appropriate position on the surface, a pointed portion provided at one end portion, and a bulging portion provided at the other end portion, Since the gist is also the hollow mold used in the method for attaching the differential streak, which is characterized by enclosing a liquid or gas, by placing concrete so that the bulging portion is located outside,
It is possible to make it easier to find the location where the hollow mold exists, and by placing concrete in the above state, the sharp end will be located at the deepest point of the concrete, but the corners around the sharp end are Since it forms an obtuse angle, it is easy to remove from concrete.

Further, since the bulging portion is an annular bulging portion having a through hole, when the hollow mold is provided on the mold before placing concrete, the rod-shaped member is pierced into the through hole. This hollow mold can be suspended by supporting it. Further, when pulling out the container by pulling the bulging portion, the container can be pulled out by hooking the through hole, and the working efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a hollow mold of the present invention.

FIG. 2 is an explanatory view showing a usage state of a hollow mold.

FIG. 3 is an explanatory diagram showing an embodiment of the method of the present invention.

FIG. 4 is an explanatory view showing an embodiment of the method of the present invention.

FIG. 5 is an explanatory view showing a usage state of a hollow mold.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hollow type 2 Tip part 3 Bulging part 4 Through hole 5 Projection part 10,13 Formwork 11 Bar-shaped member 12 Nail 20 Concrete 31 Hollow part 40 Mortar 50 Difference bar

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location E04G 21/02 103 E04G 21/02 103Z 21/12 105 21/12 105B

Claims (11)

[Claims] 1. A long and narrow resin container in which a liquid or a gas is sealed is placed at a desired position where a streak is to be attached before concrete is poured, and the liquid or gas is poured from the resin container after the concrete is poured. A method for attaching a differential muscle, wherein a space is formed by removing the container while removing the container, and a differential muscle is inserted after an adhesive is injected into the space. 2. The method for attaching a differential streak according to claim 1, wherein the resin container is a resin container having protrusions at appropriate positions on the surface. 3. The differential streak attaching method according to claim 1, wherein the resin container is made of a flexible thin resin material. 4. The differential streak attaching method according to claim 1, wherein the adhesive is an adhesive obtained by mixing an epoxy resin and a curing agent. 5. The method for attaching a differential muscle according to claim 1, wherein mortar is used as the adhesive, and the adhesive is injected into the space. 6. A liquid or gas should be sealed in advance in a resin container which is formed of a flexible resin in a thin and thin shape and has a projecting portion at an appropriate position on the surface, and a streak should be attached to this before pouring concrete. Place it in the desired position,
After removing the liquid or gas from the resin container after placing the concrete, a space is formed by taking out the container, and after inserting an adhesive into the space, a differential streak is inserted. Muscle attachment method. 7. A hollow mold for use in a method for attaching a differential line, characterized in that a liquid or gas is enclosed in a hollow rod-shaped container having an appropriate position on its surface protruding. 8. A protrusion provided at an appropriate position on the surface,
A method for attaching differential muscles, characterized in that a liquid or a gas is enclosed in a hollow rod-shaped container provided with a pointed portion provided at one end and a bulging portion provided at the other end. Hollow type used for. 9. The hollow mold used in the method for attaching a differential bar according to claim 7, wherein the container is made of a flexible thin resin material. 10. The hollow mold used in the method for attaching a differential bar according to claim 8, wherein the bulging portion is an annular bulging portion having a through hole. 11. A flexible thin-walled body having a protrusion provided at an appropriate position on the surface, a pointed portion provided at one end, and an annular bulge provided at the other end. In a hollow rod-shaped container made of resin material,
A hollow mold used for a method of attaching a differential muscle, which is characterized by enclosing a liquid or a gas.