JP2002004579A - Separator water sealing implement for concrete form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a convenient separator water sealing implement which can sandwich the separator of a concrete form from its radial direction and be used. SOLUTION: A sealant (1) of clay dried particles or powder which is converted into swelling gel by water absorption is previously sealed in an enclosing bag (2) tubularly knitted from a biodegradable synthetic fabric into a tube shape. The enclosing bag (2) is filled and set in a cover case (A) which is converted into a doughnut shape as a whole by pivoting a pair of case segments (4) and (5) at each other in such a way as to be freely open and closed made of a biodegradable synthetic resin opposing to each other. The separator (3) of the concrete form (M) is sandwiched from its radial direction in such a way that it can not come off by the closing of the case segments (4) and (5).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a separator waterproofing tool in a concrete formwork.

[0002]

2. Description of the Related Art In assembling a mold for forming various concrete structures, a plurality of separators each composed of a metal rod are pierced horizontally between opposing dams of the mold, and both ends of the separator are provided. Usually, a stay head is screwed into the threaded portion from outside the weir plate.However, concrete poured into the inside of the formwork is dewatered and settled during curing and contracts and solidifies. It is inevitable that a gap is generated at the interface with the concrete to be installed, which causes water leakage in the concrete structure, and causes a fatal problem especially in the underground structure and the structure of the landfill.

[0003] As a separator water-stopping tool which is useful for solving such a problem, there are known those disclosed in Japanese Patent No. 2802490 previously proposed by the present inventor and those shown in FIGS. 3 and 4 of Japanese Patent No. 2950507. .

[0004]

The former Patent No. 2802
In the invention of No. 490, the capsule (10) is divided into two in the axial plane of the separator (22), and a pair of divided bodies (10a) and (10b) facing each other are pivotally supported so as to be openable and closable or detachably engaged. The concrete form (M) separator (2
2) There is an advantage that it can be pinched even from the radial direction.

However, fine granular bentonite (11) must be directly filled into the capsule (10) in a dry state. At that time, the mesh covers (18a) and (18b) must be individually filled. Combined with the necessity of opening, the work of filling the bentonite (11) cannot be performed easily and conveniently.

A mesh cover (18a) for preventing the bentonite (11) from leaking and falling.
(18b) is indispensable, and the pair
The structure which is stably attached to the dividing surface of 0) in a cover state is also complicated, and it is difficult to provide such a large amount of water-stopping separator for water separator at low cost, and is inferior in mass production effect.

Further, even if the capsule (10) is made of a biodegradable synthetic resin soluble in the alkaline water of the concrete (C), in order to prevent the bentonite (11) from leaking and falling, both divided bodies are formed. (10a)
(10b) Flat left and right side surfaces (16a) (61)
Since it is necessary to reduce the diameter of the sandwiching concave grooves (15a) and (15b) for the separator while maintaining the fully closed state in the case of b), the alkaline water of the concrete (C) is quickly supplied to the bentonite (11) inside. Difficult to penetrate, giving anxiety about the stability of the water stopping effect.

On the other hand, in the case of the separator water-stopping device disclosed as the second embodiment in the second invention of Japanese Patent No. 2950507, the wrapping bag (11) is knitted in the form of a tube, so that bentonite or the like is added thereto. Granular water blocking agent (1
0) has an advantage that the filling operation can be conveniently and conveniently performed by wind power from a blower or the like.

However, the packed wrapper (11) is filled with a product which is rolled and bent into a final donut shape by heat fusion or adhesion between one end (12a) of the opening and the other end (12b) of the opening. So that the center of the entrance (16)
With the separator (1) in the concrete formwork (M).
It must be inserted through the end of 5) in advance, which is extremely troublesome. In addition, after assembly of the formwork (M), the formwork (M) can no longer be mounted on the separator (15), so that the worker cannot use it. Even if you forget, you have to leave it alone.

[0010]

SUMMARY OF THE INVENTION The present invention is intended to further improve such a problem, and comprises a bentonite, a sepiolite, and other clay-based dry particles or powders which swell and gel by water absorption. Water blocking agent,

[0011] The inside of a tubular wrapper tubular knitted from a knitting yarn of a biodegradable synthetic fiber that can be dissolved and reacted only with alkaline water of concrete into a tube form that can be extended in accordance with the swelling and gelling of the water stopping agent. To, while enclosing in advance,

Similarly, a pair of right and left case segments facing each other, which are formed in a substantially U-shaped cross section, are made of a biodegradable synthetic resin that can react and dissolve only in the alkaline water of concrete. By being freely locked, prepare a cover case that becomes an overall donut shape in front view,

[0013] In a state where the wrapper is packed and set inside the cover case, the case segments are closed or locked so that the case segments are slidably and non-detachably from the radial direction to the separator of the concrete formwork. It is characterized by having been determined in.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a first embodiment of the present invention; FIG. ,
This is a set of water-blocking agent (1) of clay-like dry particles or powder that swells and gels upon absorption of water, a wrapper (2) in which the water-stopper (1) is sealed, and a wrapper (2). And a cover case (A) for attaching the concrete form (M) to the separator (3) under the condition as described above.

As the water-blocking agent (1) of the clay-like dry particles or powder, bentonite or Sepiolite may be used alone or separately, or the ratio of bentonite to sepiolite may be about 50:50 to 50:50. About 70: 3
Mix under 0 and use.

The physical properties and chemical analysis values of the bentonite used are as shown in Tables 1 and 2 below. If this is used as a water stopping agent (1), it absorbs the alkaline water of concrete (C). Swelling and gelation, the gap formed at the boundary surface between the separator (3) of the concrete form (M) and the concrete (C) cast in the form (M) is surely closed, and stable. A water stopping effect can be achieved.

[0017]

[Table 1]

[0018]

[Table 2]

The physical properties and chemical analysis values of sepiolite (for example, trade name "Eid Plus" of Mizusawa Chemical Industry Co., Ltd.) are as shown in Tables 3 and 4 below. If used, not only the alkaline water of the concrete (C) absorbed by the bentonite, but also its three-dimensional chain-like tunnel structure (crystal structure) absorbs and gelates seawater (salts) and oils, etc. Therefore, it is useful for concrete structures whose land is landfills especially at seaside.

[0020]

[Table 3]

[0021]

[Table 4]

As the wrapper (2), a biodegradable synthetic fiber, preferably a polylactic acid fiber (for example, Kanebo), which is not yet dissolved by neutral water of PH7 but is dissolved by strong alkaline water of PH11 or more. After knitting (warp knitting and knitting) from the knitting yarn to an appropriate thickness using a synthetic fiber (trade name "Lactron"), the separator (3) of the concrete formwork (M) can be surrounded. By cutting to an appropriate length, a seamless wrapper (2) in the form of a tube as shown in FIG. 3 is finished.

Then, one end of the opening of the wrapper (2) is sealed first, and the waterproofing agent (1) is filled almost completely from the other end of the remaining opening. The part is also sealed. As a means for sealing the wrapper (2), a separate fixing tool such as an adhesive, a binding wire, a clasp, or the like can be employed in addition to the heat fusion.

The method of filling the water-stopping agent (1) can be freely selected, but by utilizing the fact that the water-stopping agent (1) is particles or powder in a dry state, for example, using a blower or the like to wind the wrapper (2). It can be said that blowing into the inside of ()) is suitable for mass production.

In any case, since the wrapper (2) is made of a knitted fabric in the form of a tube, the loop of the knitting yarn freely deforms, and as a result of its elasticity and flexibility, it is easy to do so. It can be rolled and bent and set inside the cover case (A). During use, it adheres well to the periphery of the separator (3) and follows the swelling gel of the water-stopping agent (1). It will also be stretched,
There is no danger of preventing the water-stopping agent (1) from swelling and gelling.

Further, the cover case (A) is made of a biodegradable synthetic resin, preferably a lactic acid-based resin such as aliphatic polyester, which can be dissolved by receiving strong alkaline water having a pH of 11 or more, similarly to the zipper (2). From degradable synthetic resin,
The concrete form (M) is prepared so that it can be attached to the separator (3) of the concrete form (M) even from its radial direction.

That is, the cover case (A) has a structure in which a pair of left and right case segments (4) and (5) divided into two on the axial plane of the separator (3) pivotally or disengage freely. By being freely locked,
The waterproofing agent (1) is prepared and sealed in the interior of both case segments (4) and (5), which are formed so as to have an overall donut shape in a front view and open as opposed U-shaped cross sections. The packaging bag (2) is set so that it can be packed and set.

In this regard, in the separator water stopping tool (S) of the first embodiment shown in FIGS. 1 to 7, the cover case (A)
Is formed into a ring shape having a shorter depth (L) than its diameter (D). Moreover, a pair of left and right case segments (4) and (5) forming the same are formed into an arc-shaped body surface (4a).
(5a) One zipper (2) that is opened and closed around a thin or soft hinge (6) that is pivotally connected to each other and straddles the inside of both case segments (4) and (5).
Can be stuffed and set.

(4b) is a positional relationship facing the hinge (6) by about 180 degrees, and a locking claw protruding from one of the left and right case segments (4), and (5b) is the other case segment ( 5) a pair of locking claws (4b), which are correspondingly protruding from FIG.
The closed state of the two case segments (4) and (5) is locked by the (5b) being removably locked, and the cover case (A) is kept in the overall donut shape when viewed from the front.

Further, (4c), (4c), (5c), and (5c) are a pair facing each of the flat front and rear surfaces (4d), (4d), (5d), and (5d) of each case segment (4) (5). Corresponding semi-circular cutout relief grooves for separators, both case segments (4)
The diameter (O) of the circular opening to be defined by the closing of (5) is considerably larger than the diameter (d) of the separator (3), and the inside of the cover case (A) is separated therefrom. , The alkaline water of the concrete (C) can quickly and smoothly penetrate.

The water blocking agent (1) in the form of dry clay particles or powder is previously enclosed in a wrapper (2), and there is no danger of leakage and falling.
It is possible to provide separator relief grooves (4c) (4c) (5c) (5c) having an opening diameter (O) larger than the diameter (d) of the separator.

In addition, the entire cover case (A) is in the form of a mesh, and both case segments (4)
A large number of alkaline water permeation holes (4e) (5e) are distributed on the arc-shaped body surface (4a) (5a) and the flat front and rear surfaces (4d) (4d) (5d) (5d) of (5). Yes,
From these, the alkaline water of the concrete (C) is set so as to quickly permeate into the inside of the cover case (A).

However, as long as the cover case (A) can receive and dissolve the alkaline water of the concrete (C), the cover case (A) has a large number of alkaline water permeation holes (4e) (5) as a mesh form.
Instead of distributing the openings in e), the cover case (A) may be made of a very thin film-like synthetic resin.

When using the separator water stopping device (S) of the first embodiment, the stop case (A) is opened with the case segments (4) and (5) open. Insert one of the wrappers (2) in which the liquid agent (1) is enclosed in advance into both case segments (4).
(5) is stuffed and set in a straddling state as shown in FIG.

In this case, the water-stopping agent (1) is made of dry clay particles or powder, and the wrapper (2) enclosing the same is also in the form of a tube made of a knitted fabric having high flexibility and elasticity. Therefore, the case segments (4) and (5) are settled into the interior of the case segments (4) and (5).

Then, with the two case segments (4) and (5) of the cover case (A) kept open, this is then replaced with the separator (3) of the concrete form (M).
5 and 9, the two case segments (4) and (5) are closed around the hinge (6), and the closed state is set to the locking claw (4b) ( 5
It locks by the locking of b), and it is slidably pinched to the separator (3).

Then, the concrete form (M)
During curing of the concrete (C) poured into the inside of the container, the wrapper (2) dissolves with the lapse of time due to the alkaline water of the concrete (C), and the water-stopping agent (1) that has absorbed the moisture increases. It swells and gels, closing the gap formed at the interface between the concrete (C) and the separator (3),
The waterproof case is completed, and the cover case (A) is in a state in which the wrapper (2) is packed and set.
Also reacts with the alkaline water of the concrete (C) and is decomposed over time.

In this case, in the first embodiment shown in FIGS. 1 to 7, both case segments (4) and (5) of the cover case (A) are used.
, The wrapper (2) in the form of a short tube is separately packed into each case segment (4) (5). It may be packed and set one by one, and the cover case (A)
The length (L) of each of the case segments (4) and (5) extends over the two case segments (4) and (5) as shown in FIG. ), A plurality of separate wrappers (2) are packed and set in a side-by-side state, so that the contact area with the separator (3) can be increased.

The work of attaching the water-stopping tool (S) to the separator (3) as described above is performed not only before assembling the concrete formwork (M) but also after assembling the concrete (C). If so, the so-called one-touch operation can be performed freely, so that it is possible to cope with an accidental forgetting of the attachment. Reference numeral (7) in FIG. 8 denotes a pair of opposing dam plates in the concrete formwork (M).
(8) shows a stay head screwed and fastened to both ends of the separator (3), and (9) shows a cone.

Next, FIGS. 11 to 14 show a separator water stopping device (S) according to a second embodiment of the present invention. In this case, the cover case (A) is deeper (L) than its diameter (D). ) Is formed into a long cylindrical shape, and each of the relatively thick wrapping bags (2) is separately inserted into each of the case segments (4) and (5) into an opening which is substantially U-shaped in cross section. It is packed and set.

Even with such a thick wrapping bag (2), since it is made of a knitted fabric having high elasticity and flexibility, it can be stuffed and set inside each of the case segments (4) and (5) without any trouble. Since the depth (L) along the longitudinal direction of the separator (3) extends long, the contact area with the separator (3) can be easily increased, which helps to improve the water stopping effect.

In view of the fact that the depth (L) is long, the pair of male and female locking claws (4b) (5b) for locking both case segments (4) and (5) in a closed state.
It is preferable to increase the number of sets.
Further, even in the configuration of the second embodiment, a plurality of relatively thin wrappers (2) are packed in parallel in each case segment (4) (5) of the cover case (A). can do.

When a plurality of wrappers (2) are stuffed and set in a parallel state, it is desirable that the adjacent ones are directly adhered to each other, but the partition walls (not shown) between the wrappers (2) are attached to the cover case. It can be installed inside (A). This is also because the alkaline water of the concrete (C) is received and dissolved over time, and such a configuration can be similarly applied to the first embodiment of FIGS. .

Further, FIGS. 15 and 16 show a separator water stopping device (S) according to a third embodiment of the present invention, in which both case segments (4) of a cover case (A) are shown.
Instead of the structure in which (5) is pivotally supported by a hinge (6) so that it can be opened and closed freely, a pair of left and right case segments (4)
(5) are separately prepared and prepared, and are assembled and locked in a closed state by locking pawls (4f) and (5f) for locking and disengaging each other, and a donut-shaped cover case (A) in a front view. Is formed.

In the structure of the third embodiment as well, the case segments (4) and (5) are separated from each other under the disassembled state, and are then transferred to the separator (3) of the concrete formwork (M). Since it can be used by pinching and locking from a direction, the separator water stopping tool of the present invention (S)
It is worthy of adoption. Other configurations in the second and third embodiments of FIGS. 11 to 16 are similar to those of the first to third embodiments shown in FIGS.
Since it is substantially the same as the embodiment, FIG.
6, only the corresponding reference numerals to those of FIGS. 1 to 7 are entered, and the detailed description thereof is omitted.

[0046]

As described above, in the present invention, a water-stopping agent (1) comprising bentonite, sepiolite, and other clay-like dry particles or powders which swell and gel by water absorption is used.

From the knitting yarn of the biodegradable synthetic fiber which can be dissolved only by reacting with the alkaline water of the concrete (C), it is tubular knitted into a tube form which can be expanded in accordance with the swelling gelation of the water-stopping agent (1). While enclosing it in the wrapper (2)

Similarly, a pair of right and left case segments (4) and (5) formed in a substantially U-shaped cross section facing each other are made of a biodegradable synthetic resin which can react and dissolve only in alkaline water of concrete (C). A cover case (A) which is entirely donut-shaped when viewed from the front is prepared by being pivotally supported or opened and closed so as to be freely opened and closed.

With the wrapper (2) packed and set inside the cover case (A), the case segments (4) and (5) are closed or locked together to form a concrete formwork. Since it is set so as not to fall off from the radial direction in the separator (3) of (M), the problem of the prior art described at the beginning can be completely improved.

That is, according to the configuration of the present invention, the pair of left and right case segments (4) and (5), each of which has a substantially U-shaped cross section facing the cover case (A), can pivotally open or close freely. Since it is formed into a donut shape as viewed from the front by being freely locked, the concrete form (M) is formed with its case segments (4) and (5) open or disassembled. ) Separator (3)
It can be inserted into the separator (3) irremovably by closing or locking it,
It is very convenient for installation work.

The water-blocking agent (1) composed of dry clay particles or powder such as bentonite or sepiolite is enclosed in a wrapper (2) in the form of a tube made of knitting yarn in advance. Since the bag (2) is stuffed and set inside the cover case (A), the stuffing operation can be performed very easily, and there is no possibility that the waterproofing agent (1) leaks out. In addition, it is possible to maximize the effect of mass production as a separator water stopping tool (S) used in a large amount of this kind.

Moreover, since the wrapper (2) is tubular knitted from a knitting yarn of a biodegradable synthetic fiber in a tube form having high elasticity and flexibility, the wrapping bag (2) can be easily placed inside the cover case (A). In addition to being able to be set into the separator, during use, it adheres well to the periphery of the separator (3) and, at the same time, expands freely according to the swelling gelation caused by the absorption of the water-stopping agent (1). This has the effect of reliably and stably stopping water at the interface between the separator (3) and the cast concrete (C).

The wrapper (2) enclosing the waterproofing agent (1) is made of a biodegradable synthetic fiber, and the cover case (A) in which this is packed is also made of a biodegradable synthetic resin. Since any of them can react and dissolve only in the alkaline water of the concrete (C), there is no danger of causing environmental problems in the dismantling and disposal of the concrete structure due to the time-dependent decomposition action during use.

In particular, if the constitution of claim 2 or 3 is adopted, the alkaline water of the concrete (C) poured into the concrete form (M) is used for the cover case (A).
Alkaline water permeation pores (4e) distributed throughout the opening
(5e) and the front and rear sides (4
d) Separator relief grooves (4c), (4c), (5c) cut out in (4d), (5d), and (5d) with an opening diameter (O) larger than the diameter (d) of the separator (3).
Through (5c), it quickly and smoothly penetrates into the inside of the cover case (A), and the water blocking agent (1) in the inside is surely swollen and gelled.
The water stopping effect can be further enhanced.

Furthermore, while the cover case (A) is shaped like a ring, a plurality of wrappers (2) are packed inside the case segments (4) and (5). And the cover segment (A) is made cylindrical and the case segment (4) is formed.
According to the configuration in which the wrapper (2) is stuffed and set inside (5), the contact area with the separator (3) can be further increased, and the stability and reliability of the water stopping effect are improved. improves.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing a cover case extracted from FIG. 1;

FIG. 3 is a partially cutaway front view showing a wrapper in which a waterproofing agent is sealed.

FIG. 4 is a cross-sectional view illustrating a state in which a wrapper is set in a cover case.

FIG. 5 is a cross-sectional view showing a process of sandwiching a water-stopping tool on a separator.

FIG. 6 is a cross-sectional view showing a sandwiched state following FIG. 5;

FIG. 7 is a sectional view taken along the line 7-7 in FIG. 6;

FIG. 8 is a cross-sectional view showing a usage state of the separator water stoppage tool according to the present invention.

FIG. 9 is an enlarged sectional view taken along line 9-9 in FIG.

FIG. 10 is a sectional view showing a modified embodiment of the cover case corresponding to FIG. 7;

FIG. 11 is a perspective view showing a second embodiment of the separator water stoppage tool according to the present invention.

FIG. 12 is a perspective view showing a packed state of a wrapper with respect to the cover case of FIG. 11;

FIG. 13 is an enlarged sectional view of FIG.

FIG. 14 is a perspective view showing a state in which the water stopping device of FIG. 11 is sandwiched between separators.

FIG. 15 is a perspective view showing a third embodiment of the separator water stoppage tool according to the present invention.

FIG. 16 is a sectional view showing a locked state in which the cover case of FIG. 15 is closed.

[Explanation of symbols]

 (1) ・ water blocking agent (2) ・ wrapper (3) ・ separator (4) (5) ・ case segment (4a) (5a) ・ body surface (4b) (5b) ・ locking claw (4c) ( 5c) · Relief groove (4d) (5d) · Front and rear sides (4e) (5e) · Alkaline water penetration hole (4f) (5f) · Locking claw (6) · Hinge (A) · Cover case (C)・ Concrete (M) ・ Concrete formwork (S) ・ Separator waterproofing tool (D) ・ Cover case diameter (L) ・ Cover case depth (O) ・ Escape groove opening diameter (d) ・ Separator diameter

Claims (5)

[Claims] 1. Biodegradation capable of dissolving a water-blocking agent (1) composed of bentonite, sepiolite, or other dry clay particles or powder which swells and gels upon absorption of water by reacting only with alkaline water of concrete (C). While the knitting yarn of the water-soluble synthetic fiber is previously enclosed in a tubular bag (2) formed into a tubular form that can be expanded in response to the swelling and gelation of the water-stopping agent (1), concrete is also used. (C) A pair of left and right case segments formed from a biodegradable synthetic resin capable of reacting and dissolving only in alkaline water to form a substantially U-shaped cross section.
(5) A cover case (A) having an overall donut shape when viewed from the front is prepared by locking the members so that they can be freely pivotally supported or disengaged, and the cover case (A) is provided. In a state in which the wrapper (2) is packed and set inside, the case segments (4) and (5) are closed or locked together to form a separator (3) of the concrete formwork (M). A water separator for concrete formwork separators, which is fixed so as not to fall off from the radial direction. 2. An arc-shaped body surface (4a) (5a) and flat front and rear surfaces (4d) (4d) (5d) (5d) of both case segments (4) (5) forming a cover case (A).
2. The water stopping tool for a separator of a concrete formwork according to claim 1, wherein a large number of alkaline water penetration holes (4e) (5e) are distributed in the openings. 3. Both flat front and rear surfaces (4d) (4) of both case segments (4) (5) forming the cover case (A).
d) (5d), (5d), and a pair of facing recessed grooves (4c), (4c), (5c), (5c) for the separator, which have an opening diameter (O) larger than the diameter (d) of the separator (3). 2. The water-stopping device for a separator of a concrete formwork according to claim 1, wherein: 4. The cover case (A) is formed into a ring shape whose depth (L) is shorter than its diameter (D), and straddles the inside of both case segments (4) and (5). One or more wrappers (2) are packed and set, or one or more wrappers (2) are packed and set inside each case segment (4) (5). The water separator for a concrete formwork according to claim 1. 5. The cover case (A) is formed into a cylindrical shape whose depth (L) is longer than its diameter (D), and is inserted into each of the case segments (4) and (5) one by one. 2. A water separator for a concrete formwork separator according to claim 1, wherein a plurality of wrappers (2) are packed and set.