JPH08177232A - Form anchorage device - Google Patents

Abstract

PURPOSE: To maintain a form at a specific interval by means of a separator and a form fastener in order to execute cast-in-place concrete. CONSTITUTION: A nut 2 screwing the end 10 of a separator 1 therein is held to one end of a holder 3 in a state to stop turning. A sleeve 4 is provided with sufficient strength necessary for bearing a form 8 and, at the same time, it is formed of synthetic resin with less adhesion to concrete 70. The inside end of the sleeve 4 is concentrically placed to the nut 2 and is held to the other end of the holder 3. The axial center 5 inserted in the sleeve 4 and connecting one end 50 thereof to the nut 2 with a screw is projected from the form 8, the outside end 41 of the sleeve 4 is brought into contact with the form 8, and a form fastener 7 is fastened to the projected end 51 of the axialcenter 5. A form anchorage device is a simple construction without requiring any plate-nut, concentricity and air-tightness between members are maintained to surely hold the form, and the sleeve and axial-center are simply drawn out after the stripping.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold fixing device for holding a mold at predetermined intervals by using a separator and a mold clamp called Form Tie (registered trademark) for constructing cast-in-place concrete. More particularly, the present invention relates to a mold fixing device that is used both for holding a vertical mold and for holding an inclined mold.

[0002]

2. Description of the Related Art Conventionally, as a means for holding (fixing) a cast-in-place concrete formwork at a predetermined interval by using a separator and a formwork clamp, wooden concrete (and Pcon, The same applies hereinafter) is widely known. In order to make it easier to remove the wooden concrete after demolding,
The outer periphery thereof is generally used in the form of a conical draft. If it demonstrates based on the right side part of FIG. 6, the code | symbol b is a conical wooden contact. The threaded portion s at one end of the separator a is screwed into the inner end portion of the sleeve nut u built into the wooden container b, and the one end of the shaft foot e is screwed into the outer end portion. The other end of the shaft foot e penetrates the through hole k of the mold g, and the mold g is held at a predetermined interval by tightening the mold clamp c on the end thereof.

Japanese Patent Laid-Open No. 5-79183 discloses means including a sleeve h shown on the left side of FIG. First, the nut d is screwed into the screw end s at the other end of the separator a. The sleeve h is attached to the other end of the nut d.
Screw in the shaft foot e on which is mounted. The sleeve h is the shaft foot e
8A and 8B, in order to maintain the concentricity with the plurality of leg portions h ₂ that protrude radially inward at a predetermined height from the inner peripheral surface of the cylindrical tubular portion h ₁ , It is composed of an elastic body. Then, the plate nut f is screwed into the shaft foot e supported by the nut d from the outside and brought into contact with the outside end of the sleeve h. Then, the shaft foot e is attached to the makeup form j
Through the through hole r and the through hole k of the form g. Therefore, the mold clamp c is tightened at the protruding end of the shaft foot e protruding from the mold g, and the mold g is pinched by the clamping action between the mold clamp c and the plate nut f. g is held at a predetermined interval.

Further, in the above-mentioned publication, as shown in FIG. 7, as a case of holding a tilted mold g '(and a tilted cosmetic mold j'), the tilt angle of the tilted mold g ' A mold g'is sandwiched between two inner and outer washers m and n having the same inclined surface, and flat side surfaces p and q are formed on both sides thereof, and a sleeve h is brought into contact with the inner flat surface p. , A means for holding the inclined formwork g'at a predetermined interval by bringing the tip end of the formwork clamp c into contact with the outer flat surface q for construction.

[0005]

In the conventional general wooden concrete b (see the right side of FIG. 6) having a draft, the hole left after the mold is removed is not deep and the screw end s of the separator a is exposed. To do. Therefore, even if the hole is filled with mortar, if the mortar is peeled off for some reason, the screw end s is exposed immediately, which causes rust corrosion. Although not shown in the figure, if the hole is made deeper by using a long P-shaped connector, it is difficult to pull out even though it has a draft, and workability is extremely poor.

In this respect, the sleeve h made of an elastic body shown on the left side of FIG. 6 and FIG. 7 is easy to pull out even if it is formed to be long and the draft angle is not taken into consideration, and moreover, the position of the screw end s of the separator a is located. Is deep inside the hole, and there is no concern about rust corrosion of the screw end s even if the mortar filling is peeled off to some extent. However, this sleeve h keeps the shaft foot e at the center position,
In order to maintain the concentricity of the separator a with the separator a, it is necessary to purposely form a plurality of leg portions h ₂ ... Protruding radially inward at a predetermined height on the inner peripheral surface of the cylindrical portion h _1. In addition to being obtrusive to manufacture, the manufacturing cost is high. Further, the sleeve h is made of an elastic material, and is used to sufficiently support the sleeve h with respect to the mold g.
In order to maintain the airtightness with the plate nut f, there is the troublesomeness of using the plate nut f. The plate nut f and the shaft foot e
The work of fixing the to the form g is also troublesome. Moreover, since the sleeve h and the nut d are in a state of merely abutting with each other and are not in a strong joined state, the airtightness cannot be said to be sufficient, and the pouring concrete has not penetrated. Axis foot e
May be difficult to pull out.

Even in the case of the inclined form g'of FIG. 7, it is troublesome to prepare a sleeve h having the same complicated structure as described above, and two washers m for keeping the separator a horizontal. , N must be prepared and sandwiched from both sides of the inclined form g ′, which leads to poor workability and high cost. Therefore, the object of the invention of claim 1 is to hold a vertical formwork,
With a simple structure that does not require a plate nut, the concentricity between the shaft foot and the separator is maintained, and the outer end of the sleeve directly contacts the mold to securely support the mold.
The airtightness between the sleeve and the formwork is completely maintained, and there is no risk that the poured concrete will enter the sleeve, and the shaft foot and the sleeve can be easily pulled out after demolding, which improves workability and economy. An object of the present invention is to provide an excellent mold fixing device.

In addition to the above, the object of the invention of claim 2 is that it can be applied to an inclined formwork by simply using an inclined block having a simple structure, and can be appropriately applied to a formwork of any inclination angle. An object of the present invention is to provide a mold fixing device having excellent flexibility and economy.

[0009]

As a means for solving the above-mentioned problems, a mold fixing device according to the invention of claim 1 uses a separator 1 and a mold clamp 7 to form a mold 8 at predetermined intervals. In the mold fixing device held by
The nut 2 into which the screw end 10 of the is screwed is held by the one end 30 of the holder 3 in a non-rotatable state, and the sleeve 4 is fixed to the form 8
Molded with a synthetic resin that has sufficient strength to support, and has little adhesion to the cast concrete 70,
An inner end portion 40 of the sleeve 4 is concentrically arranged with the nut 2 held by the holder 3 and is held by the other end portion 31 of the holder 3, and is inserted into the sleeve 4 so that one end 50 is screwed to the nut 2. The axial foot 5 thus formed penetrates the form 8 and is projected, and the outer end portion 41 of the sleeve 4 is formed on the inner surface of the form 8.
Are directly contacted with each other and the form clamp 7 is fastened to the protruding end portion 51 of the shaft foot 5.

In the mold fixing device according to the second aspect of the invention, the mold 8'inclined by using the separator 1 and the mold clamp 7 is used.
In the frame fixing device for holding the screws at predetermined intervals, the nut 2 into which the screw end 10 of the separator 1 is screwed is attached to the holder 3
The sleeve 4'is formed of a synthetic resin that has sufficient strength to support the molds 8 and 8'and has little adhesion to the pouring concrete 70. The outer end of the sleeve 4'is formed at an inclined end 43 having the same angle as that of the inclined mold 8 ', and the inner end 42 of the sleeve 4'is concentric with the nut 2 held by the holder 3. The shaft foot 5 held by the other end 31 of the holder 3 and inserted into the sleeve 4'and screwed at one end 50 to the nut 3 is projected through the inclined mold 8 ', and the inclined mold 8'is projected. The slanted end portion 43 of the sleeve 4 ′ is directly contacted with 8 ′, and the slanted block 6 has a slanted surface 60 at the same angle as the slanted angle of the slanted mold 8 ′, and a shaft hole 61 is provided at the center thereof. The shaft 5 is fitted in the hole 61 and the inclined surface 60
Abutting against the inclined form frame 8'and the shaft hole 6 of the inclined block 6
It is characterized in that the mold clamping member 7 is fastened to the protruding end portion 51 of the shaft foot 5 protruding from 1.

[0011]

Since the sleeve 4 of the first aspect of the present invention has the strength necessary and sufficient to support the mold 8, the outer end portion 41 of the sleeve 4 can be directly inserted into the mold 8 without using a plate nut. It can be held by abutting against the side surface, and airtightness is maintained. Nut 2
Since the sleeve 4 and the sleeve 4 are concentrically arranged via the holder 3 and are held tightly, they are easy to handle, and the inner end 50 of the shaft leg 5 inserted in the sleeve 4 is easily attached to the outer end of the screw hole 20 of the nut 2. It can be arranged concentrically with the separator 1 screwed into the nut 2 and screwed inside the nut 2. The other end 51 on the outer side of the shaft foot 5 has a through hole 8 of the mold 8.
The mold clamp 7 is fastened to the protruding end portion 51 by being penetrated through 0. That is, since the mold 8 is clamped by the mold clamp 7 on the straight line between the separator 1 and the shaft 5, the mold 8 is firmly and surely held (FIG. 2).

Further, since the sleeve 4 is made of a synthetic resin such as vinyl chloride whose surface has little adhesion to concrete and has an extremely smooth surface, when the cast concrete 70 develops a predetermined strength, it is removed from the mold. It can be pulled out easily. Further, since the airtightness between the respective members is maintained, there is no problem in removing the shaft foot 5 at all. Since the screw end portion 10 of the separator 1 is left deep in the hole after the shaft foot 5 and the sleeve 4 are pulled out and sinks deeply (FIG. 3), the screw end portion 10 is rusted by the mortar attachment and mortar is removed. There is no risk of peeling and falling concrete 70.

Since the sleeve 4'of claim 2 is made of synthetic resin, it can be easily cut, and the desired inclined end portion 43 is formed in accordance with the inclination angle of the inclined mold 8 '. A vertical outer surface 62 is formed by sandwiching the inclined mold 8'with the sleeve 4'and the inclined block 6 having the same inclined surface as the inclined angle of the inclined mold 8 ', and the mold is formed on the vertical surface 62. By fastening the frame fastening tool 7, the inclined formwork 8'can be securely held (FIGS. 4 and 5).

[0014]

EXAMPLE An example of the present invention shown in the drawings will be described below.
FIG. 1 shows each constituent member of the mold fixing device, and FIG. 2 connects the constituent members to form a vertical mold 8 and a cosmetic mold between the separator 1 and the mold clamp 7. 9 shows a usage example in which 9 is held. The makeup form 9 is applied to the inside of the form 8 and is used to form an outer wall having an uneven pattern on the surface after demolding (however, the makeup form 9 is not used. The same applies to the case).

In the figure, reference numeral 2 is a screw capable of screwing the screw end portion 10 of the separator 1 (φ = 8) and the bolt end portion 50 of the shaft foot 5 (length = 84 mm, φ = 8 bolt) from both sides. It is a hexagon nut (hole = 16 mm) having a hole 20. Reference numeral 3 in the drawing is a holder made of synthetic resin for holding the nut 2 and a sleeve described later in a straight line in a concentric arrangement from both ends. The inner end portion 30 is formed in a hexagonal shape having the same shape and size as the hexagonal nut 2 so that the hexagonal nut 2 can be fitted in a concentric arrangement. The nut 2 is held by the inner end portion 30 in a non-rotating state. ing. Outer edge 31
Is formed in a circular opening (inner diameter is about 18 mm) into which a sleeve described later is fitted in a concentric arrangement. Therefore, the holder 3 has a hollow body (both length = 30 mm) through which both ends 30, 31 penetrate. ) Is formed.

Reference numeral 4 in the drawing denotes a sleeve having a size sufficient and necessary for inserting and protecting the shaft foot 5 therein, and is formed in a cylindrical shape having a length = 45 mm and an outer diameter = 18 mm. The sleeve 4 has a strength sufficient to support the formwork, a strength that can sufficiently resist the pressure of the concrete 70, and a hard surface having a smooth surface to the extent that the adhesion to the concrete 70 is small. It is molded from synthetic resin such as vinyl chloride. Inner end 40 of sleeve 4
Is inserted into the outer end 31 of the holder 3 and temporarily fixed, and the outer end 41 of the sleeve 4 penetrates the through hole 90 of the cosmetic form 9 and directly contacts the inner surface of the form 8. Has been done. One end 50 on the inner side of the shaft foot 5 inserted in the sleeve 4 is screwed to the nut 2 inserted in the holder 3 and held by the holder 3, and the other end 51 on the outer side is of the mold 8. The form clamp 7 is fastened to the protruding end portion 51 by penetrating the through hole 80 and protruding outward.

As described above, concrete 70 is poured between the molds 8 on both sides supported by the mold fixing device. Then, after the poured concrete 70 develops a predetermined strength, it is demolded. That is, the mold clamp 7 is loosened and removed, and the molds 8 and 9 are removed. Then, the shaft foot 5 screwed to the nut 2 is removed. Finally, the sleeve 4 is removed, but since the synthetic resin sleeve 4 has little adhesion to the concrete 70, it can be easily removed with pliers or the like, and the hole 71 in the trace of the sleeve 4 is not shown. Fill with the prepared mortar. In this state, the screw end 10 of the separator 1 is deeper than the position of the holder 3 and is deeply sunk into the wall of the cast concrete 70. Therefore, the screw end 10 rusts and is damaged by the concrete 70. There is no possibility of occurrence. Therefore, a concrete outer wall having a desired uneven pattern is completed with high quality.

[0018]

[Second Embodiment] FIG. 4 shows a mold fixing device for holding inclined molds 8 '(and tilted cosmetic molds 9') as shown in FIG. 5 at predetermined intervals. The basic configuration is the first
It is almost the same as the mold fixing device of the embodiment except that a sleeve 4 ′ and an inclined block 6 having a slightly different shape of the sleeve 4 are used. That is, the outer end portion of the sleeve 4'is formed into the slant end portion 43 cut at the same angle as the slant angle of the slant form 8'shown in FIG. The inclined block 6 is formed into a prismatic shape having a side length of 28 mm and a short overall length, and the inner side surface thereof is formed into an inclined surface 60 having the same angle as the inclination angle of the inclined mold 8 ′. A shaft hole 61 of φ = 10 through which the shaft foot 5 can be inserted is provided at the center thereof.

Therefore, the outer slanted end 43 of the sleeve 4 ', whose inner end 42 is held by the other end 31 of the holder 3, penetrates through the through hole 90' of the slanting cosmetic formwork 9 '. , The sleeve 4 which is brought into direct contact with the inner surface of the inclined formwork 8 '.
The horizontal position of is retained. The tilt block 6 has its shaft hole 6
1, the protruding end portion 51 of the shaft foot 5 is inserted into the inclined surface 60.
Is in contact with the outer surface of the inclined mold 8 '. Therefore, since the vertical surface 62 is held at the outer end of the tilt block 6, the form clamp 7 is firmly fastened to the protruding end 51 of the shaft foot 5 protruding from the shaft hole 61 of the tilt block 6. be able to. After demolding, sleeve 4 ', shaft foot 5
The same operational effects as those of the first embodiment, such as the ease of removing the same, can be obtained. Moreover, according to this embodiment, the mold 8 '(and the cosmetic mold 9') formed at any angle can be flexibly changed by simply cutting one end of the sleeve 4'with a cutter or the like. Can respond.

[0020]

According to the mold fixing device of the invention of claim 1, the sleeve 4 can be easily pulled out without considering the draft, and the workability is good. The screw end 10 of the separator 1 is deep inside the hole 71 after the sleeve 4 is removed, and even if the mortar filling is slightly peeled off, the screw end 1
0 has no fear of rusting and corrosion, and has a simple structure that does not use plate nuts or washers. Concentricity and airtightness between each member are maintained, and form 8 is held securely. Therefore, the sleeve 4 and the shaft foot 5 can be reliably and easily pulled out after the mold is released, which contributes to the improvement of workability and economy. Further, according to the mold fixing device according to the invention of claim 2, it is also excellent in flexibility that it can appropriately cope with molds having various inclination angles.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a mold fixing device.

FIG. 2 is a cross-sectional view showing a usage state of the mold fixing device.

FIG. 3 is a cross-sectional view showing a removed state of the sleeve.

FIG. 4 is a perspective view showing a mold fixing device of a second embodiment.

FIG. 5 is a cross-sectional view showing a use state of the mold fixing device of the second embodiment.

FIG. 6 is a cross-sectional view showing a conventional example.

FIG. 7 is a sectional view showing a different conventional example.

FIG. 8 is a side view showing a conventional sleeve, and B is a sectional view of A taken along the line II of FIG.

[Explanation of symbols]

 1 Separator 2 Nut 3 Holder 4, 4'Sleeve 40, 42 Inner End 41 Outer End 43 Inclined End 5 Shaft Foot 51 Protruding End 6 Tilt Block 60 Tilt Surface 61 Shaft Hole 7 Form Clamp 70 Concrete 8, 8'formwork

Claims (2)

[Claims] 1. A mold fixing device for holding a mold at a predetermined interval by using a separator and a mold clamp, wherein a nut into which a screw end of the separator is screwed is held at one end of a holder in a non-rotating state. The sleeve is made of synthetic resin that has sufficient strength to support the formwork and has little adhesion to the poured concrete.
An inner end of the sleeve is concentrically arranged with the nut held by the holder and is held by the other end of the holder, and a shaft foot that is inserted into the sleeve and has one end screwed to the nut penetrates the mold. Form fixing device, characterized in that the outer end of the sleeve is directly contacted with the inner surface of the form, and the form clamp is fastened to the protruding end of the shaft foot. . 2. A mold fixing device for holding a tilted mold at a predetermined interval by using a separator and a mold clamp, wherein a nut into which a screw end of the separator is screwed is held in a state of not rotating at one end of a holder. The sleeve has a strength sufficient to support the inclined form and is made of a synthetic resin that has little adhesion to the poured concrete, and its outer end is the same as the inclined angle of the inclined form. The inner end of the sleeve is held at the other end of the holder in a concentric arrangement with the nut held by the holder, and is inserted into the sleeve so that one end of the nut is formed. The screwed shaft leg is projected through the slanting form, the slanted end of the sleeve is directly contacted with the inner surface of the slanting form, and the slanting block has the same angle as the slanting angle of the slanting form. Inclination A shaft hole is provided in the center having a surface, the shaft foot is fitted into the shaft hole, the inclined surface is brought into contact with the inclined mold, and the protruding end of the shaft foot protruding from the shaft hole of the inclined block. The mold fixing device is characterized in that a mold clamp is fastened to the portion.