JPH09317176A - Concrete formwork separator waterproofing tool - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To easily attach to a separator of a concrete form in a radial direction for use. A water-stop agent in which a capsule (10) made of a biodegradable synthetic resin is divided into two in the axial plane of a separator (22), and the divided surfaces of the divided bodies (10a) and (10b) are enclosed in the divided surface. The split body (1) is covered with biodegradable synthetic resin mesh covers (18a) and (18b) which prevent leakage of (11) but allow permeation of alkaline water.
It is defined that the members 0a and 10b can be opened and closed, or can be engaged and disengaged so as to be sandwiched radially from the separator (22) of the concrete form (M).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separator water stopping device for a concrete formwork.

[0002]

2. Description of the Related Art In the formwork construction of various concrete structures, when assembling and fixing the formwork, a plurality of separators made of metal rods are laid horizontally between the dam plates facing each other, and both ends It is customary to fasten the form tie to the screw part from the outside of the weir plate, but the concrete placed in the formwork is dehydrated and settled and shrinks and solidifies during curing, so the interface between the separator and concrete Even if it is very small, it is inevitable that a gap will be generated, which will cause water leakage in the concrete structure and cause a fatal defect particularly in the case of an underground structure.

Therefore, one of the inventors of the present invention has previously proposed Japanese Patent Application No. 7-115662 as a "water stopping tool for concrete" which is useful for solving such a problem, and has put it into practice.

[0004]

However, in the first embodiment of the invention of the prior application, which is shown in FIGS. 1 to 3 and FIG. 6 for use as a separator, the water-blocking material (11) made of a superabsorbent compound due to its structure. -Shaped capsule (container) for filling with (10)
And a lid (101) for sealing one of the open end surfaces, there are still the following problems.

That is, firstly, since the water-stopping device (1) is of a type in which the separator (4) penetrates the separator (4) for use in attaching to the separator (4), it is very troublesome, and After being fixed to the separator (4), the separator cannot be used anymore. Therefore, even if the user forgets to attach the separator, it must be left alone. ) May be extruded.

Second, the capsule (10) and the lid (101)
Is cut through the notch (10a) given by the separator (4), and the direction in which the lid (101) covers the capsule (10) is parallel to the axial direction of the separator (4). In the state, when the separator (4) is inserted, there is a problem that the lid (101) comes out of the capsule (10) unexpectedly, and the water-stopping material (11) falls and scatters.

Third, the capsule (10) is made of a biodegradable synthetic resin which decomposes in response to alkaline water of the concrete (6), and the lid (101) is made of a synthetic resin having the same properties. Since the lid (101) is not made, the lid (101) is enclosed and left in the concrete structure, which may cause environmental problems in dismantling and disposal.

[0008]

DISCLOSURE OF THE INVENTION The present invention is intended to improve such a problem, and because of its constitution, a capsule made of a biodegradable synthetic resin that decomposes by reacting only with alkaline water of concrete, In a separator water-stopping tool in a concrete formwork consisting of a water-stopping agent of a highly water-absorbing compound enclosed inside,

The capsule is divided into two in the axial plane of the separator, and a pair of opposing divided bodies are pivotally supported so as to be openable and closable or engageably and disengageably engaged, and the divided surface of each divided body is divided into two parts. While preventing the leakage of the waterproofing agent enclosed in, the lid is covered with a mesh cover made of biodegradable synthetic resin that allows the permeation of alkaline water, and by closing or locking the divided bodies, It is characterized in that it is specified to be sandwiched from the radial direction of the separator of the concrete formwork.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the drawings. First, FIGS. 1 to 4 show a first embodiment of a separator water-stopping tool, and (10) shows ordinary water and It is a capsule made of biodegradable synthetic resin that does not decompose even if it receives rainwater etc., it reacts only with alkaline water of concrete and decomposes with time, and its hollow interior is a waterstop composed of a highly water-absorbing compound (11) will be enclosed and then used by being attached to the separator of the concrete form. As for the size of the capsule (10), for example, assuming that the thickness of the separator is about 6 mm, a hollow cylindrical type having a diameter of about 22 mm and a length of about 25 mm may be used in proportion to this. preferable.

The water blocking agent (11) absorbs alkaline water of concrete and swells and fluidizes, so that the water blocking agent (11) penetrates into a gap formed at the interface between the concrete and the separator,
It closes the gaps, specifically polyacrylic acid and its salts, polyvinylchol superabsorbent polymer, organic water-absorbent polymer such as acrylonitrile hydrophilic cross-linked polymer, and clay-like dry represented by bentonite. It consists of inorganic water-absorbing particles such as powder or particles.
Then, when the water is swollen and flowed by water absorption, the used amount is filled so as to fill the inside of the capsule.

The biodegradable synthetic resin forming the capsule (10) has a pH of 11 to 11 in concrete.
In view of the fact that it is 13, it is necessary to rapidly hydrolyze it with alkaline water having a pH of 11 or more, and in this sense, an aliphatic polyester is employed. However, a petroleum-based biodegradable synthetic resin may be used instead of the lactic acid-based resin.

In this case, in order to promote the progress of the hydrolysis, a hydrophilic polymer such as starch, polyvinyl alcohol and polyethylene glycol, and an alkali hydrolyzable compound such as succinic anhydride and polysuccinimide are used as a decomposition accelerator. You may add as.

Further, in order to improve the strength, flexibility, impact resistance, etc. of the capsule (10), a plasticizer or a lubricant may be added as necessary, or phase separation may occur with the aliphatic polyester. A general-purpose synthetic resin that does not need to be added may be added.

In any case, according to the present invention, the capsule (10) is, of course, before the assembly of the concrete formwork,
Even after the assembly and fixing, the separator can be freely mounted and used from the radial direction of the separator.

That is, in the case of the first embodiment shown in FIGS. 1 to 4, the capsule (10) is pivotally supported by a pair of divided bodies (10a) (10b) which are divided into two on the axial plane of the separator. And in its closed state it forms an overall cylindrical shape.

Each of the divided bodies (10a) and (10b) is formed in a semi-cylindrical shape having a fixed length (L) and a constant diameter (D). It can be opened and closed around a soft hinge (12). (13) is a locking claw which is located at the center of the arc surface facing the hinge (12) 180 degrees and protrudes outward from one of the divided bodies (10a), and (14) is also the other divided claw. Body (1
0b) to the locking claw (13) corresponding to the locking claw (13). Body (10a)
The closed state of (10b) is adapted to be locked.

In this respect, in the illustrated example, the locking claws (13) (1)
4), each divided body (10a) (10b)
Are projected from the central portion in the longitudinal direction in the above, but the number and the projected position can be freely selected in relation to the size of the capsule (10).

(15a) and (15b) correspond to each divided body (10
a) The flat left and right side surfaces of (10b) (16a) (1
6b), a pair of separator sandwiching concave grooves formed corresponding to (6b), (17a) and (17b) are likewise divided parts (10
a) A pair of front and rear mesh cover receiving projections that are located in the vicinity of the open edge of (10b) and project inwardly from the arc surface of the divided body (10).
a) Although the rail configuration extends along the longitudinal direction of (10b), the plurality of projection configurations may be distributed at regular intervals.

Further, (18a) and (18b) represent the respective divided bodies (1).
The divided surfaces of 0a) and 10b) are capped, and the water blocking agent (1
1) A pair of square mesh covers facing each other to prevent them from leaking out and falling. This is also a capsule (10).
Made from the same biodegradable synthetic resin. The mesh of the mesh covers (18a) and (18b) has a water blocking agent (1
The leakage of 1) is prevented and at the same time, the permeation of alkaline water into the waterproofing agent (11) is allowed. As long as this function is exhibited, water-absorbing paper or other thin film material that rots or melts to the extent that it can be regarded as decomposed by receiving alkaline water of concrete may be used.

(19a) and (19b) are concave curved surfaces which are depressed along the longitudinal center lines of the respective mesh covers (18a) and (18b), and hold the separator holding grooves (10a) and (10b) for the separators. 15a) and (15b), respectively, or aligned in a parallel state communicating with the holding concave grooves (15a) and (15b).

Reference numerals (20a) and (20b) denote a pair of front and rear insertion leg pieces which are similarly bent and raised from parallel long sides of the respective mesh covers (18a) and (18b).
The elastic claws (21a) and (21b) which bend at the tip of each of the insertion leg pieces (20a) and (20b) when the lids are inserted into the open surfaces of 0a) and (10b) are attached to each divided body (10a). ) The receiving projection (17a) of (10b).
(17b).

In using the capsule (10) of the first embodiment, both divided bodies (10a) and (10b) are used.
The water-blocking agent (11) consisting of dried particles of bentonite or the like is filled in the capsule (10) from the open divided surface of the mesh so that the mesh cover (18a) ( 18b) is kept locked by the insertion locking. Then, the above divided bodies (10a)
(10b) is left open and is inserted into the separator (22) of the concrete form (M) from the radial direction, and the two divided bodies (10a) and (10b) are hinged (1).
2) and one of the locking claws (1
By locking 3) and the other locking claw (14), the lock is maintained without falling off from the separator (22).

Then, the concrete form (M)
During curing of the concrete (C) placed inside, the waterproofing agent (11) that has absorbed the alkaline water swells and fluidizes, and closes the gap generated at the interface between the concrete (C) and the separator (22). That means the capsule (10)
The mesh covers (18a) and (18b) also react with alkaline water and decompose over time. Therefore, it is possible to obtain a concrete structure free from the problem of water leakage from the gap and the environmental problem in dismantling and disposal.

The capsule (10) can be mounted and used on the separator (22) not only before assembling the concrete formwork (M) but also after assembly and fixing, so-called one-touch operation freely. Needless to say. Reference numeral (23) in FIG. 5 is a pair of facing weir plates that form the concrete form (M), (24) is a tie tie fastened to both ends of the separator (22), and (2).
5) shows a cone.

Next, FIG. 7 shows a second embodiment of the present invention. The capsule (10) also comprises a pair of opposed divided bodies (10a) (10b) pivotally supported so as to be openable and closable. The mesh covers (18a) (18b) are not independent from the divided bodies (10a) (10b), and one of the long sides is continuously integrated with the hinge (12) of the divided bodies (10a) (10b). And is in an attached state that can be opened and closed around the hinge (12).

Since the other construction is substantially the same as that of the first embodiment shown in FIGS. 1 to 6, only the corresponding reference numerals to those shown in FIGS. Is omitted.

The third embodiment of the present invention shown in FIG. 8 is substantially the same as the second embodiment shown in FIG. 7 in terms of the structure of the capsule (10), but in this case, the two divided bodies (10a) (10
A corresponding pair of locking claws (13) and (14) extending over the entire length in b) is releasably locked so that the two divided bodies (10a) and (10b) can be locked.
Can be locked.

FIG. 9 relates to a fourth embodiment of the present invention, in which a capsule (10) of a pair of opposing divided bodies (10a) (1) which are pivotally supported so as to be openable and closable similarly to the first embodiment.
0b), but the split surface is open only at a part on the longitudinal center line corresponding to the groove width of the sandwiching concave grooves (15a) (15b) for the separator, and the remainder is formed in a closed state. I have.

The open portion of the divided surface is covered with a pair of trough-type mesh covers (18a) (18b) composed of only concave curved surfaces (19a) (19b). In that case, each divided body (10
a) Rail-shaped mesh cover receiving groove (26a) extending in the longitudinal direction along the open edge of (10b).
(26b) corresponding to the engagement protrusion (27a)
The mesh cover (18a) (1
8b) can be slidably inserted in the longitudinal direction to keep the divided surfaces of the divided bodies (10a) and (10b) in a covered state. The divided body (10a) (10
b) Mesh cover (18a) (18b) from the radial direction
It is also conceivable to detachably insert and lock.

In the first to fourth embodiments, the hinge (1
Capsule (1) composed of a pair of opposing divided bodies (10a) (10b) that are pivotally connected and opened and closed freely via 2).
0), but as is apparent from the fifth embodiment of FIGS. 10 and 11, the two divided bodies (10a) and (10b) are separated from each other so that one of the divided bodies (10a) is moved toward the other. The overhanging claw (13) and the other divided body (10
The locking claw (14) formed corresponding to b) may be locked in an entirely cylindrical closed state by locking and unlocking the locking claw (14).

The means for attaching the mesh covers (18a) (18b) to the respective divided bodies (10a) (10b)
Since it is substantially the same as the first embodiment of FIGS. 1 to 6, detailed description of the configuration is omitted.

FIG. 12 shows a sixth embodiment of the present invention. In this embodiment, the two divided bodies (10a) (1
0b), a dovetail-shaped locking groove (28) is arranged in the longitudinal direction, and a locking ridge (29) corresponding to the locking groove (28) is formed on the other. And the two divided bodies (10
a) By slidingly inserting (10b) from the longitudinal direction, the lid is closed in a closed state.

The means for attaching the mesh covers (18a) (18b) to each of the divided bodies (10a) (10b)
Since it is substantially the same as the fourth embodiment in FIG. 9, detailed description of the configuration is omitted.

FIGS. 13 and 14 show a seventh embodiment of the present invention, in which both separate bodies (10
a) An opening flange (30a) (30b) projecting inward from (10b) is formed with a removably insertable projection (31) and a receiving hole (32) thereof. ) And (18b) are attached and fixed, and the two divided bodies (10a) and (10b) can be covered in a closed state.

[0036]

In summary, according to the present invention, a capsule (10) made of a biodegradable synthetic resin that decomposes by reacting only with alkaline water of concrete (C) and a highly water-absorbing compound enclosed therein. A separator waterproofing tool for a concrete formwork (M) comprising a waterproofing agent (11),

The capsule (10) was placed in a separator (2)
2) is divided into two in the axial plane, and a pair of divided bodies (10a) and (10b) facing each other is pivotally supported so as to be able to open and close or is detachably locked, and each of the divided bodies (1
A mesh cover (18a) made of biodegradable synthetic resin that allows the permeation of alkaline water while preventing leakage of the waterproofing agent (11) enclosed in the divided surfaces of 0a and 10b.
(18b) is used to cover the divided body (10a) (1
0b) By closing or locking each other, it is specified that they are sandwiched between the separators (22) of the concrete formwork (M) from the radial direction thereof. Therefore, the problems of the invention of the earlier application mentioned at the beginning are improved. There is an effect that can be done.

That is, according to the above configuration of the present invention, a pair of divided bodies (10a) whose capsules (10) face each other.
(10b) is pivotally supported so as to be openable and closable, or is engaged so as to be freely disengageable, so that the divided bodies (10a) and (10b)
b) In a state where the comrades are opened or disassembled, the concrete form (M) is inserted into the separator (22) from the radial direction, and is attached so as not to fall off from the separator (22) by closing or locking the separator. Can be used,
Notably convenient.

Further, the water blocking agent (11) filled in the capsule (10) is divided into each divided body (10a) (10b).
Mesh covers (18a) (18a)
Since it is kept in a sealed state by b), it is possible to carry the divided bodies (10a) and (10b) in the opened or disassembled state and to attach them to the separator (22). There is no fear of disturbing.

Further, the mesh cover (18a) (1
8b) is composed of a biodegradable synthetic resin which is decomposed by reacting only with alkaline water like the split bodies (10a) and (10b), and has a mesh form which allows the permeation of the alkaline water. 11) can be swelled and fluidized smoothly to reliably close the gap generated at the interface between the concrete (C) and the separator (22), and also dismantling and discarding treatment in a concrete structure due to the decomposition action over time. There is no fear of causing the above environmental problems.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a separator water stopping device according to the present invention.

FIG. 2 is a front view showing the closed state of FIG. 1;

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a cross-sectional view showing an open state of a separator water stopping device.

FIG. 5 is a cross-sectional view showing the mounting and use state of the separator waterproofing tool.

FIG. 6 is an enlarged sectional view taken along line 6-6 of FIG.

FIG. 7 is a sectional view corresponding to FIG. 6, showing a second embodiment of the present invention.

FIG. 8 is a sectional view showing a third embodiment of the present invention.

FIG. 9 is a sectional view showing a fourth embodiment of the present invention.

FIG. 10 is an exploded perspective view showing a fifth embodiment of the present invention.

11 is a sectional view showing the assembled state of FIG.

FIG. 12 is a sectional view showing a sixth embodiment of the present invention.

FIG. 13 is a sectional view showing a seventh embodiment of the present invention.

FIG. 14 is an enlarged sectional view taken along line 14-14 of FIG.

[Explanation of symbols]

 (10) -Capsule (10a) -Divided body (10b) -Divided body (11) -Waterstop (18a) -Mesh cover (18b) -Mesh cover (22) -Separator (C) -Concrete (M)- Concrete formwork

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Iwao Hyoi B-508 No. 2-chome, Sunadabashi, Higashi-ku, Nagoya-shi, Aichi

Claims (1)

[Claims] 1. A capsule (10) made of a biodegradable synthetic resin which decomposes in response to only alkaline water of concrete (C).
And a water-stopping agent of a highly water-absorbing compound (1
In a separator water-stopping tool for a concrete formwork (M) consisting of 1) and 2), the capsule (10) is divided into two in the axial plane of the separator (22), and a pair of opposing divided bodies (10)
a) (10b) Pivotally support each other so as to be openable and closable, or engageably and disengageably locked, and the water blocking agent (11) in which the divided surfaces of the respective divided bodies (10a) and (10b) are enclosed. ) Is prevented, but
A biodegradable synthetic resin mesh cover (18a) (18b) that allows permeation of alkaline water is used to cover the divided bodies (10a) and (10b). A separator water-stopping tool for concrete formwork, characterized in that the separator (22) of M) is sandwiched from the radial direction.