JPS625476Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to the improvement of a positioning tool for regulating the position of opposing formwork for creating sidewalls of gutters at its lower end in the direction in which it is installed, and its purpose is to reduce costs. Although it is constructed from flat strip material, (a) it can reliably exert the desired position regulating action, and (b) it can exhibit great resistance to external forces such as tension, compression, and bending. Furthermore (c)
It is possible to sufficiently secure the bonding strength of the prepared side gutter side wall to the pre-prepared gutter bottom wall, and (d) to reliably absorb the pressure in the outward direction of the opposed formwork, and to secure the outer side of the formwork bottom. The aim is to provide a positioning mechanism that can prevent the edges from lifting up and that requires only very simple machining to have a structure that allows these functions (a) to (d) to be performed. exists in

First, embodiments of the present invention will be described below based on the drawings.

Figure 1 schematically shows the state of the gutter side wall creation work. Concrete C 1, which will become the gutter bottom wall, has been placed in advance at the bottom of the gutter m formed by excavating the soil, and concrete C ₁ is placed on top of it at appropriate intervals. Separate formwork positioning tool A,
A is placed thereon, and formworks 8, 8, . In addition, 9 is a separator that indexably supports the opposed formworks 8, 8, and 10
...is a tie with a turnbuckle.

As shown in FIGS. 2 to 4, the positioning tool A is made of a flat strip material made of steel or iron, and the opposed formwork 8,
By bending both sides of the flat strip material in the width direction upwardly and standing it upright while leaving the flat strip portions 1, 1 corresponding to the lower end width of 8, the opposite formwork 8,
Positioning parts 2, 2 for regulating the position of the lower end of 8 in the opposite direction thereof, and positioning parts 3, 3, for regulating the position in the opposite direction to the opposite direction.
3, 3 at both ends in the longitudinal direction, and a through hole 5 for passage of concrete is provided in the bottom plate part 4 extending between the two flat strip parts 1, 1 over almost its entire length.
, and nails 1 are attached to both flat strip parts 1, 1.
Holes 6, 6 for inserting 1 are formed.
In addition, 3a, 3a... are notched grooves for engaging the lower end protruding plate portions 8a, 8a of the opposing formworks 8, 8 to prevent the formworks 8, 8 from rising, and 7, 7 are flat grooves. This is a folding line formed in the form of a perforation at the boundary between the band plate parts 1, 1 and the bottom plate part 4.

The fact that the positioning parts 2, 2, 3, 3... are bent and erected from the flat strip material not only serves to reinforce the positioning tool A made of the strip material, but also improves the positioning tool A in plan view. As a comparative example, the occupied horizontal width a is made to be considerably smaller than the horizontal width a' of the original flat strip material shown in FIG. In addition, since the through hole 5 is formed in the bottom plate portion 4, as shown in FIG. , it is possible to expand the area in which the concrete C ₁ that was placed first and the concrete C ₂ that was placed later between the opposed formworks 8 and 8 can be combined. Furthermore, despite the formation of the through hole 5, the bending and standing arrangement of the positioning portions 2, 2 also serves as a reinforcing effect, so that the problem of strength reduction does not occur so much.

In summary, the positioning tool for the formwork for making gutter sidewalls according to the present invention is provided with flat strip parts 1, 1 corresponding to the width of the lower end of the opposite formworks 8, 8 for making gutter sidewalls near both ends in the longitudinal direction of the flat strip material. , the both sides of the flat strip material in the board width direction are bent upward and erected, and the inner positioning is performed to regulate the position of the lower end of the opposed formworks 8, 8 in the opposed direction. The portions 3, 3 on both sides in the width direction of the flat strip portions 1, 1, which constitute the flat strip portions 1, 1 and extend a predetermined length further outward, are also bent upward, respectively. an outer positioning part 3 for positionally regulating the lower end position of the opposed formworks 8, 8 in a direction opposite to the direction in which they are opposed;
3, and characterized in that these outer positioning parts 3, 3 are provided with cutout grooves 3a, 3a in which the lower end protruding plate parts 8a, 8a of the opposed formworks 8, 8 engage. As a result, the following effects were achieved.

That is, by providing the positioning parts 2, 2 which are bent upwardly inwardly and outwardly with the opposed formwork 8 in between, the inward movement of the opposed formwork 8 can be reliably prevented. Moreover, not only can the inner spacing be easily maintained at a predetermined spacing, but also movement to the outside during concrete pouring can be reliably regulated.

Further, there is an advantage that the large outward pressure during concrete pouring can be strongly absorbed by the outer positioning portions 3, 3, which have widths in the outward and outward directions of the formwork. That is, since the poured concrete pressure is received in a direction perpendicular to the bending direction of the outer positioning part 3, a reliable receiving action can be obtained without the positioning part 3 easily escaping.

Furthermore, the cutout grooves 3a, 3a provided in the outer positioning parts 3, 3 can prevent the bottom outer end of the formwork 8 from lifting up, and reliably prevent the formwork 8 from falling inward. There are advantages that can be achieved.

As described above, a simple bending process of the flat strip material can produce remarkable effects, and there is an advantage that accurate concrete placement can be performed.

Furthermore, since both the inner positioning part and the outer positioning part are formed so as to face each other, the positioning of the formwork in the outward and outward directions is extremely stable. Since a through hole is formed for the concrete to pass through, the poured concrete comes into direct contact with the ground located on the underside of the positioning tool through this through hole, making it possible to stabilize the positioning tool and also to prevent the break line from breaking. Due to this formation, we also expect the effect that after the formwork is dismantled, the flat band plate located below the formwork can be easily broken off and removed from its base end along the break line. I was able to do this.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the positioning tool for a gutter side wall forming form according to the present invention, and Fig. 1 is a front view of the formwork assembled, Fig. 2 is an enlarged longitudinal sectional front view of the main part thereof, and Fig. 3 4 is a plan view of the positioning tool, and FIG. 4 is a longitudinal sectional side view. Incidentally, FIGS. 5 and 6 are longitudinal sectional side views of a comparative example. 1...Flat strip part, 2...Positioning part, 4...
Bottom plate part, 5... through hole, 8... formwork.

Claims (1)

[Scope of utility model registration request] With flat strip parts 1, 1 corresponding to the lower end widths of the opposite formworks 8, 8 for making gutter side walls left near both ends in the longitudinal direction of the flat strip material, both sides in the width direction of the flat strip material are left. are bent upward and erected to form two opposing outer positioning parts 3, 3 that regulate the lower end positions of the opposed formworks 8, 8 in a direction opposite to the direction in which they are opposed, and The portions of the band plate portions 1, 1 that extend further outward by a predetermined length are also bent upwardly in a posture along the longitudinal direction of the plate material to form the opposed formworks 8, 8. Two opposing outer positioning parts 3, 3 are formed for positionally regulating the lower end position of the outer positioning parts 3, 3 in a direction opposite to the direction in which they are opposed, and the above-mentioned opposing type Cutout grooves 3a, 3a are provided in which the lower end protruding plate portions 8a, 8a of the frames 8, 8 engage, and a through hole 5 for passage of concrete is further formed in the bottom plate portion 4 between the flat strip plate portions 1, 1. In addition, the flat strip portions 1, 1
A positioning tool for a formwork for making a gutter side wall, in which breaking lines 7, 7 for breaking are formed at the boundary position between the bottom plate part 4 and the bottom plate part 4.