JPH09279699A - Construction method for induced joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of peel and a fall of an induced joint, to simplify construction, and to reduce a cost by a method wherein clogs-form locking tools are fixed at intervals of a given distance on the joint of a concrete wall surface and by nipping a joint material. SOLUTION: A joint 1 of a concrete surface (a) of the outer wall of a reinforced concrete-made building is filled with a caulking material throughout the overall length of the joint. A plurality of clog-form lock tools 3 are arranged along the joint 1 on the joint 1, and a base 3a is fixed on the concrete surface (a) by means of a mounting screw 4. A strip-form joint material 5 is inserted and nipped between a pair of protrusion pieces 3b formed on the base 3a of the lock tool 3 and held throughout the overall length of the joint 1. The two sides of each joint material 5 are coated with mortar, and the whole surface of a concrete surface (a) is coated with mortar (b) for a tile ground in such a manner to match with the height of the joint material 5. Through a simple process wherein the joint material 5 is held at a lock tool 3, fixed by a screw, through the elastic force of a protrusion piece 3b, causes of peel and a fall of coat finish due to the induced joint are dissolved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to induction in the case of providing an induction joint for coating such as mortar finish on a joint provided to induce a crack generated on a concrete surface such as an outer wall of a reinforced concrete building. Concerning the construction method of joints.

[0002]

2. Description of the Related Art In order to prevent cracks due to shrinkage due to hardening of concrete from irregularly dispersing on the wall surface on the concrete surface such as the outer wall of a reinforced concrete building, joints are vertically and laterally formed on the concrete surface. Etc. at predetermined intervals to induce cracks in the joints. When applying a coating such as mortar finish to the concrete surface, in order to prevent cracks due to shrinkage of the concrete from propagating on the coated surface, the finish is applied to the joint of the concrete surface over the entire length of the joint. It is necessary to provide a trigger joint for use. Conventionally, when providing an induction joint for coating on a joint of a concrete surface, first, as shown in FIG.
To prevent rainwater from entering through the cracked portion in the joint 1. Since the board-like joint material 5 made of foamed styrene foam or the like is installed on the joint 1 over the entire length of the joint 1, the temporary fixing mortars 7 are arranged at predetermined intervals on both sides of the joint material 5.
Is applied in a dank-like shape to temporarily fix the joint material 5 to the concrete surface a. Next, while observing the hardening of the temporary fixing mortar 7, the presser mortar 8 is applied and sandwiched along the joint material 5 along the entire length of both sides of the joint material 5 so that the mortar adheres to the concrete surface a. A construction method for fixing the joint material 5 is used. In this case, presser foot mortar 8 is joint material 5
The height of the presser mortar cross section 8 is kept lower than the height of the above. After the presser mortar 8 is hardened, the mortar finish b is applied over the entire concrete surface a.
Etc. are being constructed.

[0003]

In the above-mentioned conventional method for constructing the induced joint, the water content of the presser mortar used to fix the joint material to the concrete surface is absorbed by the concrete or is rapidly dried, resulting in poor adhesion. Mortar peels off or rises from the concrete surface. Therefore, rainwater or the like enters from the portion where the mortar is peeled off or floated up, and also spreads to the coating finish portion with the lapse of time, causing defects such as peeling and falling off of the coating finish. Also, the work of pressing the joint material onto the concrete surface and fixing it with mortar requires skill and requires a professional such as a plasterer, and the jointing process and work of the joint material are complicated and time-consuming and costly. There was a problem such as. The present invention has been proposed in view of the above problems of the prior art, and its object is to eliminate defects such as peeling and falling off in coating, reduce the number of days and costs because no skilled worker is required. It is intended to provide a method of constructing a trigger joint that can

[0004]

DISCLOSURE OF THE INVENTION The present invention is a method for constructing an induction joint that achieves the above object. The construction method is to install a plurality of fasteners that hold the joint material along the joint at predetermined intervals on the joint of the concrete surface filled with caulking material over the entire length, and joint the joints The material was sandwiched, and then mortar was applied to both sides of the joint material so as to retain the joint material on the joint of the concrete surface. Also, the locking tool for holding the joint material is formed in a clog shape having a pair of protrusions on the pedestal at intervals to clamp the joint material, and the pedestal of the locking tool is attached to the concrete surface with a plurality of screws. Thus, the locking tool is fixed.

According to the above-mentioned invention, since the pedestal for holding the joint material is fixed to the concrete surface with the mounting screw or the like, the pedestal of the fastener does not fall off from the concrete surface, and a pair of protrusions of the locking tool. Since the joint material inserted between the pieces is sandwiched by the elasticity of the projecting piece, the joint material can be reliably held. Further, after fixing the joint material to the concrete surface, the mortar can be applied according to the height of the joint material, so that the mortar can be evenly applied to a predetermined thickness.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show an embodiment of a method for constructing an induction joint according to the present invention, showing a state in which a mortar b for tile foundation is applied to a concrete surface a of an outer wall of a reinforced concrete building (see FIG. 1). . In the construction method, first, caulking material 2 is filled over the entire length of the joint 1 so that rainwater does not enter from the cracks induced in the joint 1 of the concrete surface a (see FIG. 2 (a) [see One step]).

On the joint 1, a plurality of locking tools 3 molded in the shape of a geta that holds the joint material at a predetermined interval (usually about 45 Cm intervals) along the joint 1, and the pedestal 3a are attached by screws 4 To the concrete surface a (see FIG. 2B [second step]). It should be noted that instead of the mounting screw 4, the pedestal 3a of the locking device 3 may be adhered and fixed to the concrete surface a with an adhesive,
Alternatively, the pedestal 3a may be fixed by using both the mounting screw 4 and the adhesive material. The joint material 5 formed in the shape of a strip plate (usually having a thickness of 1 Cm and a height of 2 Cm to 4 Cm), for example, of styrene foam is provided between the pair of opposing projecting pieces 3b provided on the pedestal 3a of the locking tool 3. By inserting and sandwiching the joint material 5, the joint material 5 is held on the joint 1 over the entire length of the joint 1 (see FIG. 2C [third step]). When the joint material 5 is coated with the adhesive material 6 and sandwiched between the projecting pieces of the locking tool 3, the joint material 5 and the locking tool 3 are bonded to each other, so that the joint material 5 can be held more reliably. Then, mortar is applied to both sides of each joint material 5, and mortar b for tile foundation is applied all over the concrete surface a.

FIG. 3 shows an embodiment of the locking tool 3 used in the present invention. The locking tool 3 is made of a synthetic resin material and molded into a clog shape. A pair of projecting pieces 3b (corresponding to the teeth of a geta) for sandwiching the joint material 5 are projectingly provided on the pedestal 3a of the locking tool 3, and the concrete surface a is provided on both sides of the pedestal 3a of the pair of projecting pieces 3b.
A plurality of screw holes 3c for mounting screws 4 for fixing to the screw holes are drilled. The pair of protruding pieces 3b are provided at intervals suitable for holding the joint material 5, and the joint material 5 is sandwiched by the elastic force of the member by inserting the joint material 5 between the pair of protruding pieces 3b. The material of the locking tool 3 may be any material that is corrosion resistant and rust resistant, and the shape and the like can be freely designed as long as it has a function of reliably installing the joint material 5 on the concrete surface a. You can do it. Since the pedestal 3a for holding the joint material is fixed to the concrete surface a with the mounting screw 4 or the like, the pedestal 3a of the fastener 3 does not fall off from the concrete surface a, and the locking tool 3 is Joint material 5 inserted between the protruding pieces 3b
The joint material 5 can be securely held because the protrusions 3b are clamped by the elastic force.

[0009]

According to the present invention, for the construction of the induced joint, the base of the fastener is fixed to the concrete surface with a mounting screw or the like, and the joint material is inserted and sandwiched between the two protrusions of the fastener. Since it is only necessary to hold it, the construction becomes a simple work in a simple process, and a professional such as a plasterer is not required, and the number of days and cost can be reduced. Further, when the mortar is applied to both sides of the joint material, the mortar can be applied according to the height of the joint material, so that it can be evenly applied to a predetermined thickness. In addition, the locking tool for installing the joint material is fixed to the concrete surface with a mounting screw or the like and does not fall off from the concrete surface, and the joint material is securely held by being clamped by the elastic force of the protruding piece of the locking tool. There is no defect that the joint material peels off or rises from the concrete surface as in the conventional case, and it is possible to eliminate the causes such as peeling and falling off of the coating due to the induced joint. Further, the locking device for installing the joint material is economical because it can be manufactured with a simple structure and an inexpensive material.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a construction method of the present invention.

FIG. 2 is a cross-sectional view showing the construction process of FIG. 1, in which (a) shows a first process, (b) shows a second process, and (c) shows a third process.

3A and 3B show an embodiment of a locking tool of the present invention, wherein FIG. 3A is a plan view, FIG. 3B is an elevation view, and FIG.

FIG. 4 is a sectional view showing an example of a conventional construction method.

[Explanation of symbols]

 1 joint 2 caulking material 3 locking tool 4 mounting screw 5 joint material 6 adhesive

Claims (2)

[Claims] 1. A construction method in the case of providing an induction joint for coating such as mortar finishing on a concrete surface such as an outer wall of a reinforced concrete building, which is a joint surface of a concrete surface filled with caulking material over the entire length. In addition, while attaching a plurality of locking tools for holding the joint material along the joints at predetermined intervals, each joint member is clamped with the joint material, and thereafter,
Mortar is applied to both sides of the joint material so that the joint material is retained on the joint of the concrete surface. 2. The retainer for holding the joint material is formed into a geta-like shape having a pair of protrusions on the pedestal at intervals for sandwiching the joint material, and the pedestal of the retainer is made of a concrete surface with a plurality of screws. The method for constructing the induced joint according to claim 1, wherein the method is applied to the.