JP3025596B2 - Concrete formwork spacing retainer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spacing device for a concrete form used mainly for placing cloth-based concrete.

[0002]

2. Description of the Related Art Heretofore, this kind of spacing holder has a pair of outer positions for regulating the position of the outer surface of a cloth-based concrete formwork by bending both left and right ends of a holder body made of a vertically long plate material upward. A regulating piece is provided. Moreover, some in the middle portion of the holder body that is formed by cutting and raising a pair of inner position regulating piece performing position regulation of the inner surface of the mold. By engaging the lower part of the cloth-based concrete formwork between the inner and outer position regulating pieces, both formworks can be held at predetermined positions.

[0003]

In the above-mentioned conventional form spacing device, after the cloth foundation concrete is cast on the solid foundation concrete, the form is removed, and the outer position is located on both lower sides of the cloth foundation concrete. The control piece is exposed.
For this reason, rust was generated, it was obstructive, and further, there was a problem in the safety of the feet of the worker.

A first object of the present invention is to make it possible to easily separate the outer position regulating piece from the spacing holder body having the groove-shaped reinforcing structure in a state where the concrete form has been removed after the foundation concrete is cast. An object of the present invention is to provide a spacing device for a concrete formwork.

[0005] A second object of the present invention is to provide, in addition to the first object, a spacing of a concrete form in which an inner position regulating piece can be easily formed without lowering the strength of an upper horizontal portion. To provide tools.

A third object of the present invention, in addition to the second object, is to provide a concrete form spacing holder which can reliably control the position of the concrete form by the inner position restricting piece. is there.

A fourth object of the present invention, in addition to the first, second, and third objects, is to provide a concrete form spacing device capable of locking an outer position regulating piece to a concrete form. It is in.

A fifth object of the present invention, in addition to the fourth object, is to provide a concrete form spacing retainer which can freely set the bending strength by changing the thickness and width of the locking portion. Is to do.

A sixth object of the present invention is to provide the first, second, and third aspects.
Another object of the present invention is to provide a concrete formwork space holding tool that can more easily perform the work of separating the outer position regulating piece in addition to the objects of 3, 4, and 5.

[0010]

According to the first aspect of the present invention,
In order to achieve the first and second objects, in an interval holding tool for a concrete form provided with a pair of outer position regulating pieces for regulating a position of an outer side surface of the concrete form, an upper horizontal portion, a side wall, and a lower side. Among the horizontal parts, at least in the middle part of the spacing member main body having a groove-like reinforcing structure that opens downward with the upper horizontal part and the side wall part, at a position substantially corresponding to the inner side surface of the concrete formwork or outside thereof. Forming a fragile portion including a cutout or the like in the side wall portion or the side wall portion and the lower horizontal portion so as to be located, allowing the upper horizontal portion to be bent at a position corresponding to the fragile portion, and being outside the fragile portion. Is located at the same position as the inside of both notches, etc.
Bend the side wall upwards to remove the inner surface of the concrete formwork.
An inner position regulating piece for regulating the position is provided.

According to a second aspect of the present invention, in order to achieve the third object, in the first aspect , the inner position regulating piece is set to be larger than the height of the side wall, and protrudes from the height of the side wall. The portion is cut off when a notch or the like is formed in a side wall portion or a part of the side wall portion and the horizontal portion of another spacing member main body.

According to a third aspect of the present invention, in order to achieve the fourth object, a bendable locking portion which is locked to a concrete form is provided to the outer position regulating piece in the first or second aspect . .

Furthermore, in order to achieve the fifth object, in the invention according to claim 4 , the locking portion is formed separately from the outer position regulating piece in claim 3 . Furthermore, the invention described in claim 5 achieves the sixth object by providing claims 1, 2, 3
Alternatively, in 4 , a bendable perforation or groove is formed in the separation portion provided in the upper horizontal portion.

[0014]

According to the first aspect of the present invention, the side wall portion or the side wall portion is located at a position substantially corresponding to the inside surface of the concrete form or outside thereof except for the upper horizontal portion at the intermediate portion of the spacing member main body. And a weak portion formed of a notch or the like in the lower horizontal portion, the upper horizontal portion can be bent upward at a position where the outer position regulating piece corresponds to the weak portion. By repeating this operation and the restoring operation several times, the separating portion is broken by material fatigue, and the outer position regulating piece can be separated from the holder main body. In addition, empty such as notch
Curve the side wall located in the middle between
It was a placement restriction piece. For this reason, the inner position is restricted on the upper horizontal part.
The strength of the upper horizontal
Without lowering the degree and using the notch
The placement restriction piece can be easily formed.

According to the second aspect of the present invention, since the height of the inner position restricting piece is larger than the height of the side wall, the position of the inner surface of the concrete form can be reliably regulated. Further, when press-molding a plurality of spacing holder bodies, the tip of the inner position regulating piece is made of a material that becomes a notch of another holder body, so that there is no waste of material cost.

Further, according to the third aspect of the present invention, the locking portion can be bent and locked to the concrete form, and the main body of the spacing member can be locked to the concrete form. further,
According to the fourth aspect of the present invention, since the locking portion is formed separately from the holder main body, the bending strength of the locking portion can be freely set.

Further, according to the fifth aspect of the present invention, the perforations or grooves are provided in the separating portion, so that the separating portion can be easily cut off.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention;
An embodiment will be described with reference to FIGS.

As shown in FIG. 1, the spacing member body 1 is formed by bending a flat plate made of, for example, soft iron or the like by pressing or the like so that the cross section thereof is concave downward. The holder main body 1 is composed of an upper horizontal portion 2 and left and right side wall portions 3 and 4 which are formed by bending both sides of the horizontal portion 2 downward.

Both ends of the spacing member main body 1 are respectively curved upward, and a pair of outer position regulating pieces 5 and 6 are formed. These outer position restricting pieces 5, 6 regulate the position of the lower end outer surface of the concrete formwork K, K.

Notches 7 and 8 are formed in the side walls 3 and 4 at the intermediate portion of the spacing holder body 1 at positions corresponding to the inner surfaces of the concrete forms K and K. For this reason, the main body 1 is connected only by the upper horizontal portion 2 located between the cutouts 7 and 8, and this portion is used for separating the outer position control pieces 5 and 6 from the intermediate portion of the main body 1 after placing concrete. It becomes separation parts 2a and 2b. The bending strength in the vertical direction at the separation portions 2a and 2b is much smaller than that of the other main body 1, so that the outer position regulating pieces 5 and 6 can be gripped and bent. The strength of the separation portions 2a and 2b is set so as to sufficiently withstand the tensile force acting in the horizontal direction during concrete casting.

In this embodiment, both side walls 3 and 4 are formed.
Cutouts 7, 8 are formed in a triangular shape and located inside
Flip the triangular side wall upward 180 degrees centering on the upper edge
To regulate the position of the inner surface of the concrete formwork K, K
The inner position regulating pieces 9 and 10 are provided. Cloth foundation concrete
After the placement of the toe C, as shown in FIG.
0 is embedded in concrete C, but
The outer position regulating pieces 5, 6 are reciprocated around the separation parts 2a, 2b.
When moved, the outer position regulating pieces 5, 6 are separated from the separating portions 2a, 2b.
Can be separated.

In this embodiment, both notches 7 and 8 are formed.
The triangular side wall is curved upward to form the inner position regulating piece 9,
It was set to 10. For this reason, as shown in FIG.
Compared to cutting and raising the inner position regulating piece at
Not less than the notch without lowering the strength of the upper horizontal portion 2
Easily form inner position regulating pieces 9 and 10 using 7, 8
can do.

Next, the operation of the spacing member configured as described above will be described. Fill the ready-mixed concrete into the cloth-based concrete formwork K, K shown in FIGS.
Cloth base concrete C on top of base concrete C _B
Is installed. When the molds K, K are removed after the concrete C has hardened, the central portion of the holder main body 1 is buried in the lowermost portion of the concrete C as shown in FIG. Is exposed. After that, the work of holding the outer position restricting pieces 5 and 6 and bending it upward around the separating parts 2a and 2b and the work of restoring it several times are performed. , 6 can be separated from the middle part of the body 1. For this reason, when casting the cloth foundation concrete on the solid foundation concrete, it is possible to separate the exposed outer position regulating pieces 5 and 6 by removing the formwork after placing the cloth foundation concrete. It is safe and beautiful.

It should be noted that in the above embodiment, the vertical direction was formed.
Although not shown, the notches 7 and 8 are inclined or arcuate.
Or you may. Although not shown, notches 7 and 8 are also shown.
May be enlarged, or a rectangular or triangular window may be provided , for example .

[0026] Next, the embodying the invention of claim 2, wherein
The second embodiment will be described with reference to FIGS. In this embodiment, as shown in FIG. 4 , the spacing holder main body 1 is formed by bending a flat plate made of, for example, soft iron or the like by pressing or the like so that the cross section becomes uneven. The main body 1 is composed of two upper horizontal portions 2, 2, one lower horizontal portion 2A, and four side wall portions 3, 4, 3A, 4A.

Height h1 (= h2) of both side walls 3 (4)
It is desirable to set as low as possible in order to prevent fresh concrete (commonly known as slag) from escaping from the gap between the lower surface of the formwork K and the base concrete at the time of placing concrete. Then, if only one of the side walls 3 and 4 is cut and raised to form the inner position regulating pieces 9 and 10, the position regulation of the molds K and K is incomplete because it is too low. Therefore, in this embodiment, the inner position restricting pieces 9 and 10 are formed in a vertically long rectangular shape, and the height H is set to be slightly larger than the sum of the heights h1 and h2 of the side walls 3 and 4. Have been. As shown in Sunawa Chi 5, in the press punching process of the body 1, 1 constituting the two spacing holder, to a part of the height h1, h2 and horizontal part 2 of the previously sidewall portions 3, 4 cut Parts 7 and 8 are formed. (Refer to the cutting depth L in FIG. 4 ) And, when the material is removed, the inside position regulating pieces 9, 10 are cut and raised without waste (H = h1).
+ H2 + L).

Further, in this embodiment, in addition to the notches 7, 8, the lower horizontal portion 2A located inside and the inner side wall 3
A and 4A are formed with slit-shaped notches 7a and 8a. Then, the two position regulating pieces 5, 6 can be separated from the separation portions 2a, 2b.

Next, a third embodiment of the present invention will be described.
The third embodiment will be described with reference to FIGS. In this embodiment, a bendable locking portion 12 is formed integrally with both outer position regulating pieces 5 and 6 in the spacing device of the second embodiment described above. Then, the locking portion 12 is connected to the leg portion 12.
As shown in FIG. 7 , the space holding tool can be attached to the formwork K by bending and locking the formwork K around the form a.

The following are conceivable modifications of the locking portion 12 of the third embodiment. As shown in FIG. 8 , the width of the leg portion 12a of the locking portion 12 may be smaller than the width of the horizontal portion 2. or,
As shown in FIG. 9 , a notch 7 is formed in the horizontal portion 2A of the main body 1 provided with a lower horizontal portion 2A at the lower portion of the side wall portions 3 and 4, and a locking portion is formed on the upper portion of the outer position regulating piece 5. 1
2 may be formed integrally. Further, as shown in FIG. 10 , a pair of locking portions 12 may be integrally formed on the upper portion of the outer position regulating piece 5.

Next, a fourth embodiment of the present invention will be described.
The fourth embodiment will be described with reference to FIG. In this embodiment, the locking portion 12 is formed separately from the main body 1 and the lower end of the leg portion 12a is fixed to the outer position regulating piece 5 by spot welding or caulking, for example.
It is anchored in. Therefore, the plate thickness and bending strength of the locking portion 12 can be set to desired dimensions and strength, and the bending strength of the locking portion 12 can be set freely.

As a modification of the locking portion 12 of the fourth embodiment, as shown in FIG. 12 , a pair of legs 12a, 1
Or attaching the lower end of the 2a outward position regulating piece 5, FIG. 13
As shown in (2), the lower portion of the rectangular locking portion 12 may be attached to the regulating portion 5 by welding or the like. In addition, as shown in FIG. 14
As shown in FIG. 15 , a notch 12b may be formed in the locking portion 12 so that the notch 12b can be easily bent, or as shown in FIG. 15 , the notch 12b may be formed in an arc-shaped window. .

FIG. 16 shows a modification of the mounting structure of the locking portion 12. A crimping piece 3b formed to be bendable by the notches 3a, 4a in a state where the pair of legs 12a, 12a of the locking portion 12 are inserted into a pair of left and right grooves formed outside the outer position regulating piece 5. , 4b. A projection 1 is provided on the legs 12a, 12a of the locking portion 12.
The protrusion 12c is formed by pushing out on the locking portion 12 in a state where the locking portion 2c is formed by being extruded outward.
Strikes the caulking pieces 3b, 4b to prevent extraction. Although not shown, a separate locking portion 12 is similarly crimped to the outer position regulating piece 6.

Next, the embodying the invention of claim 5, wherein
5 embodiment will be described with reference to FIG 17. In this embodiment, in each of the above-described embodiments, the separation portions 2a and 2
A perforation 15 is formed for b. This perforation 1
When the outer position regulating pieces 5 and 6 are reciprocated in the up and down direction by 5, metal fatigue of the separation parts 2 a and 2 b is promoted, and the work of breaking the regulating parts 5 and 6 can be performed quickly.
Instead of the perforations 15, grooves (not shown) may be formed.

The present invention is not limited to the above embodiment, but may be embodied by changing the configuration of each part as follows without departing from the spirit of the present invention. (1) The formation positions of the notches 7, 8 are provided outside the inner position regulating pieces 9, 10.

[0036] (2) or apply the configuration of the first to fifth embodiments in other embodiments, or apply respectively to the first to fifth exemplary modification of another embodiment of the Example thing. (3) As shown in FIGS.
10 is formed on one side of the spacing holder body 1.

[0037]

As described in detail above, the invention of each claim has the following advantages because it is configured as described in the claims.

According to the first aspect of the present invention, since the spacing member body having the groove-shaped reinforcing structure has the fragile portion formed at a position substantially corresponding to the inner surface of the concrete form or at a position outside the same. After the concrete is cast, the concrete formwork is removed, and the outer position regulating piece can be easily separated from the spacing holder body at a position corresponding to the fragile portion. Further, in this separating operation, it is possible to prevent the corner of the cloth foundation concrete in the vicinity of the broken portion of the spacing member main body from being damaged.

In addition , as compared with the case where the inside position regulating piece is cut and raised in the upper horizontal portion, the inside position regulating piece can be easily formed by using the cutout without lowering the strength of the upper horizontal portion. Can be formed.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, since the inner position regulating piece is formed to be high, the position regulation of the inner side surface of the concrete form is ensured, and material is removed. In this case, waste can be eliminated.

Further, the third aspect of the present invention is the first aspect of the present invention.
Or , in addition to the effects of the invention described in 2 , the locking portion can be bent and locked on the concrete formwork to lock the spacing member body on the concrete formwork.

Further, the invention described in claim 4 provides the invention according to claim 3.
In addition to the effects of the described invention, the bending strength of the locking portion can be set freely, and the locking operation can be performed quickly. Further, in the invention according to claim 5 , in addition to the effect of the invention described in claim 1, 2, 3, or 4 , a perforation or a groove is provided in the separating section, so that the separating section can be more easily cut off. It can be carried out.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view for explaining a work of breaking off a regulating portion after concrete is poured.

FIG. 3 is a perspective view of a spacing member having an inside position regulating piece.
is there.

FIG. 4 shows a second embodiment embodying the invention of claim 2;
FIG.

FIG. 5 is a press forming step of the spacing member main body according to the second embodiment .
FIG.

FIG. 6 shows a third embodiment embodying the invention of claim 3;
FIG.

FIG. 7 is a diagram showing a state of use of the spacing device according to the third embodiment .
It is sectional drawing.

FIG. 8 is a partial perspective view showing a modification of the locking portion.

FIG. 9 is a partial perspective view showing a modification of the locking portion.

FIG. 10 is a partial perspective view showing a modification of the locking portion.

FIG. 11 is a fourth embodiment of the present invention;
FIG.

FIG. 12 is a partial perspective view showing a modification of the locking portion of the fourth embodiment .
FIG.

FIG. 13 is a partial perspective view showing a modification of the locking portion of the fourth embodiment .
FIG.

FIG. 14 is a partial perspective view showing a modification of the locking portion of the fourth embodiment .
FIG.

FIG. 15 is a partial perspective view showing a modification of the locking portion of the fourth embodiment .
FIG.

FIG. 16 is a partial perspective view showing a modification of the locking portion of the fourth embodiment .
FIG.

FIG. 17 shows a fifth embodiment of the present invention;
FIG.

FIG. 18 is a perspective view showing another example of the present invention.

FIG. 19 is a perspective view showing another example of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main body of space holding | maintenance, 2 ... Upper horizontal part, 2A ... Lower horizontal part, 2a, 2b ... Separation part, 3, 3A, 4, 4A ... Side wall part, 5, 6 ... Outer position control piece, 7, 7a , 8, 8a ... notch, 9, 10, ... inner position regulating piece, 12 ... locking part, 12
a ... legs, 15 ... perforations.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04G 17/00-17/14 E02D 27/01

Claims (5)

(57) [Claims] 1. A concrete formwork spacing retainer provided with a pair of outer position regulating pieces for regulating a position of an outer side surface of a concrete formwork, wherein at least one of an upper horizontal portion, a side wall portion, and a lower horizontal portion is provided. The side wall portion is positioned at a position substantially corresponding to the inner surface of the concrete form or at the outside thereof at an intermediate portion of the spacing member main body having a groove-like reinforcing structure having a horizontal portion and a side wall portion and having a downward opening. Alternatively, a fragile portion including a cutout or the like is formed in the side wall portion and the lower horizontal portion, and the upper horizontal portion is bendable at a position corresponding to the fragile portion, and a portion located outside the fragile portion is maintained at an interval. Separation part that can be separated from the tool body , and both notches
Folds the side wall upward at the inside or almost the same position of the part
Position to regulate the position of the inside surface of the concrete formwork
A spacing member for a concrete formwork provided with a regulating piece . 2. The inner position regulating piece according to claim 1, wherein the inner position regulating piece is set to be larger than the height of the side wall, and a portion protruding from the height of the side wall is a side wall or a side wall and a horizontal part of another spacing holder body. A space retainer for a concrete formwork that is cut out when forming a notch or the like in a portion of the concrete form. 3. A spacing device for a concrete form according to claim 1 or 2, wherein the outer position regulating piece has a bendable locking portion to be locked to the concrete form. 4. A spacing device for a concrete formwork according to claim 3, wherein the locking portion is a locking plate formed separately from the outer position regulating piece. 5. A concrete formwork spacing retainer according to claim 1, 2, 3 or 4, wherein a bendable perforation or groove is formed in the separating portion provided in the upper horizontal portion.