JPS6257787B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to an improvement of a positioning member for regulating the position of an earth-facing formwork for making side ditches in the inner and outer directions at its lower end.

9 and 10 are representative examples of conventional positioning members of this type. In the case shown in Fig. 9, the end of the flat strip material is raised upward to form an outer position regulating piece 01 that comes into contact with the outer end surface of the peripheral protruding plate part of the ground-facing formwork, and at the same time, it is placed inwardly. ,
The protruding member 02' that fits into the hole of the plate is welded, but since the bending line of the regulating piece 01 is perpendicular to the longitudinal direction of the strip material, it is not affected by the lateral pressure load of the concrete being poured. Since the effective counter width to demonstrate counter-attack ability is only the thin plate thickness, the formwork was easily tilted by this load, making it difficult to perform strong and reliable positioning, and the formwork lifted up. Sometimes the tendency is even greater.

In Fig. 10, the regulating piece 01 for the outer end surface of the protruding plate part and the regulating piece 02 for the inner surface of the lower end of the form are both formed upright from flat strip material, but the folding lines of these regulating pieces are Since it was the same as that in Figure 9, there was a risk that it would be tilted in the same way.

Therefore, it was considered to weld two protruding members 02' shown in Fig. 9 to ensure and strongly control both the internal and external positions, but the protruding members had to be constructed separately and not welded. Therefore, it cannot be denied that it is disadvantageous in terms of cost.

In view of the above circumstances, it is an object of the present invention to provide a device that exhibits a strong and reliable positioning action against displacement caused by external force at a relatively low cost.

The positioning member of the earth-facing formwork referred to in the present invention is a positioning member a for regulating the position of the earth-facing formwork 9 in the inner and outer directions at its lower end, and is a flat strip material A made of metal such as steel or iron. The longitudinal end portion of ' is raised upward along the longitudinal direction to form a position regulating piece 1 that comes into contact with the outer end surface 9a of the lower end peripheral protruding plate part 9A of the earth-facing form 9, and A portion located near the position regulating piece 1 is formed into a flat strip part 3 for placing the lower end peripheral protruding plate part 9A, and the lower end protruding part is formed on the flat strip part 3 side of the position regulating piece 1. A notched groove 1a for vertical positioning and engagement with the outer end of the plate portion 9A is formed, and the mold is further positioned on the inner side of the flat strip plate portion 3 and raised upward along the longitudinal direction thereof. It is characterized in that a position regulating piece 2 is formed inward with respect to the frame 9, and a break line 5 is formed at the base end of the position regulating piece 2 of the flat strip portion 3.

That is, the upright-formed regulating piece is integrally connected to the flat strip material body over a long range along the inside and outside directions of the ground formwork, and is a counter piece that exhibits the ability to resist external forces. Since the effective width is this long integrally connected length, the integrally connected range (counter effective width) in this direction is only the thickness of the flat strip material,
Therefore, the movement of the formwork in the inward and outward directions can be restricted extremely strongly and reliably, compared to conventional forms that are likely to be tipped over. However, like the conventional one shown in FIG. 10, each regulating piece is constructed by simply bending a flat strip material, and unlike the conventional projection member shown in FIG. Since it is not constructed and then welded, there is no cost increase.

In particular, in the present invention, a notch groove for vertical positioning and engagement with the outer end of the protruding plate around the lower end of the formwork is formed on the flat band plate side of the position regulating piece. Therefore, the positioning of the formwork can be performed more reliably without floating, and it can be ensured that the formwork does not take a lodging position or float during and after assembly. As a result, we have come to expect that it will have a remarkable effect in preventing the spread of cancer.

As described above, according to the present invention, a positioning member capable of exerting a strong and reliable positioning action is formed by using a single flat strip material, and the longitudinal end portion thereof
By raising the inner part of the flat strip part, which is left as a flat strip material, upward along its longitudinal direction, the formwork can be moved outward and moved inward. The movement and the vertical movement of the outer end of the protruding plate portion around the lower end of the formwork can be prevented and regulated all at once, and the formwork is placed directly on the flat strip plate portion. We have developed a relatively new positioning member that allows the formwork to stay in a low position, almost directly touching the ground without lifting up from the mounting surface below, and prevents poured concrete slag from flowing out from the bottom of the formwork. It has now been possible to construct the structure at low cost.

Moreover, in the case of the present invention, the positioning member for the ground formwork is formed of a single flat strip material made of metal such as steel or iron, and the position regulating piece of the flat strip portion has a raised base end. Since a break line is formed in the part, the part protruding outward from the concrete wall can be easily broken off from the break line and removed after dismantling the formwork, so it is possible to remove the part without forming concrete. This also has the effect that no positioning member remains in the portion, and therefore deterioration due to rusting, corrosion, etc. can be extremely reduced.

Embodiments of the present invention will be described below based on the drawings.

Figure 1 schematically shows the gutter making work. After pouring concrete c into the bottom of a trench m formed by excavating the soil, form positioning tools A and A are placed at appropriate intervals. , formworks 9, 9... are assembled on top of it. The parts that make up the assembled formwork k,
The vertically adjacent formworks 9 are connected via U clips 10 at their opposing peripheral projecting plate portions 9A, 9A. Between the assembly formworks k and k whose inner surfaces (concrete receiving surfaces) face each other, separators 11 are installed at the opposing plate parts 9A and 9A and 9A and 9A, and the upper end plate part 9
Tie 1 with turnbuckle 12a between A and 9A
2 has been constructed. Moreover, a long length with a turnbuckle 13a is also provided between one side gutter concrete wall forming formwork device K constituted by opposed assembly formworks k and k and the other similar formwork device K. A tie 13... has been constructed.

The positioning tool A has a pair of inner and outer positioning members a and a that are integrally connected. That is, as shown in FIG. 2, after punching out a flat strip material A' having the shape shown in the figure from a single sheet of steel or iron flat strip material, both ends in the longitudinal direction and the left and right sides of the middle are cut out, respectively. The regulating piece is formed by standing upwardly with a folded line along the longitudinal direction. This will be explained in more detail as follows.

That is, each positioning member a is one according to the present invention, and includes a left and right integral upright, external It has a side position regulating piece 1.1, and has right and left integrated rising/inward position regulating pieces 2.2 that come into contact with the lower end of the inner surface 9b of the ground-facing formwork 9,
Furthermore, between the outer regulating pieces 1, 1 and the inner regulating pieces 2, 2, there is a flat plate which connects the respective intermediate horizontal connecting plate parts 1A, 2A to each other, and on which the lower end protruding plate part 9A is placed. It has a band plate part 3. The inner regulating pieces 2, 2 and the connecting plate portion 2A of the one positioning member a, and the inner regulating pieces 2, 2 and the connecting plate portion 2A of the other positioning member a are integrally connected to each other. It is set up. 1
A.1a is a notch groove for engaging the outer end of the lower end protruding plate portion 9A to determine the vertical position of the formwork 9, and is formed in the outer regulating piece 1.1. 3a
is a hole formed in the flat strip part 3, and this hole 3a
The positioning member a is fixed by driving the nail 8 into the concrete c through the nail 8. Also,
Reference numeral 5 denotes a breaking line formed in a perforation-like recess at a position corresponding to the inner surface of the formwork 9, and after the formwork 9 is dismantled, the portion protruding outward from the concrete frame is broken along this line 5 and removed.

5 to 8 relate to the second embodiment, and the sixth embodiment
FIG. 7 shows the positioning tool A in the first embodiment divided into two parts, that is, a part corresponding to the positioning member a. The inner regulating pieces 2, 2 in this positioning member a have pin holes 2a, 2, respectively.
The pin hole 6 of the connecting intermediate bar 6 has a plurality of a... arranged in parallel and is fitted between the inner regulating pieces 2 and 2 as shown in Fig. 8.
By passing the pin 7 through one of the inner regulating pieces 2 and the pair of pin holes 2a, 2a on the inner regulating pieces 2, 2a, the two a and 6 are connected. That is, the inner regulating pieces 2 serve also as the connecting portion 4 of the bar 6. Another positioning member a is similarly connected to the other end of the bar 6. This constitutes a long positioning tool A.

When such a bar 6 is used, the distance between the opposing assembly formworks k and k is relatively long as shown in FIG. It's summery.

[Brief explanation of the drawing]

The drawings show an embodiment of the positioning member of the ground formwork according to the present invention, FIG. 1 is a side view of the formwork assembled, FIG. 2 is a developed view of the positioning member, and FIG. 3 is a side view of the positioning member. 4 is a plan view of the positioning member, FIG. 5 is a sectional view of another embodiment in an assembled state, FIG. 6 is a side view of the main parts, and FIG. 7 is a plan view thereof; FIG. 8 is a sectional view. Incidentally, FIGS. 9 and 10 are perspective views showing conventional ones. 1... Outer position regulating piece, 1a... Notch groove, 2
...Inner position regulating piece, 3...Flat strip part, 4...
Bar connection part, 6...Bar, 9...Grounding formwork, 9A
...Protruding plate part, 9a...Outer end surface, 9b...Inner surface,
a...Positioning member, A'...Flat strip material.

Claims (1)

[Claims] 1 A positioning member a for regulating the position of the ground formwork 9 in the inner and outer directions at its lower end, which is made of steel.
The longitudinal end portion of a flat strip material A' made of metal such as iron is raised upward along the longitudinal direction and is brought into contact with the outer end surface 9a of the protruding plate portion 9A around the lower end of the ground formwork 9. A corresponding position regulating piece 1 is formed, and a portion located in the vicinity of this position regulating piece 1 is formed as a flat strip plate portion 3 for placing the lower end peripheral protruding plate portion 9A. On the flat strip portion 3 side,
A cutout groove 1a is formed for vertical positioning and engagement with the outer end of the lower end peripheral protruding plate portion 9A, and a cutout groove 1a is formed on the inner side of the flat strip plate portion 3 and stands upwardly along the longitudinal direction thereof. A ground-facing type in which a position regulating piece 2 is formed inward with respect to the raised formwork 9, and a break line 5 is formed at the raised base end portion of the position regulating piece 2 of the flat strip portion 3. Frame positioning member.