JPS601169Y2 - Structure of ears for concrete separator - Google Patents

Description

[Detailed description of the invention] The present invention is a flat plate-shaped concrete separator ear that is inserted between protruding plate parts around adjacent concrete forms and locked and fixed via hinges. Regarding the improvement of the structure of.

In the conventional separator, as shown in Figure 11: A and I, the length of the ear portion OA is considerably shorter than the protruding width OL of the protruding plate portion 14 of the formwork C. It's been done.

This is because the manseparator O8 is buried in the poured concrete and cannot be used for other purposes, and the ears OA protruding from the concrete surface are cut off for surface finishing when the formwork is dismantled after the concrete has hardened. In view of this, the length was set to the minimum necessary in order to save materials as much as possible and to ensure tensile strength while reducing costs. It had been.

However, when assembling formwork C... groups in multiple stages as shown in Fig. 11C using a separator os like this, the length OL of the ear part OA is the length of the protruding plate part 14. Therefore, a gap 014 is created on the outer end side of each opposing plate portion 14, ``4'', in which the upper plate portion 14 cannot be supported by the lower plate portion 14. Due to There is a risk that the shape will not be the same as expected, and to prevent this, it is necessary to use considerably strong and therefore expensive nickel formwork support (such as end pieces). So I decided to go ahead and add 11 more to the cost.

On the other hand, as can be seen in the specification and drawings of the Japanese Utility Model Publication No. 48-9792, for example, a separator is formed in which the length of the peripheral projecting plate part of the concrete formwork is equal and the length of the ear part is formed over the entire width. However, such a shape requires the longest possible material for separator production, which has the drawback of increasing costs.

The present invention focuses on this problem and aims to reduce costs as much as possible by saving materials, while also reliably preventing the warping and tilting of formwork groups in the case of multi-layered formwork stacking. It is something to do.

The structure of the ears for concrete separators according to the present invention is as follows:
A hole for pin insertion is bored at the axial center position of the flat plate-like ear. From the part where the hole is drilled to the outer end side, the projecting length of the peripheral protruding plate part of the concrete formwork and It is formed of an extended part having equal or almost equal length and a part shorter and smaller in length than the extended part, and the shape of the extended part is set to the center line along the width direction of the hole forming part and the above. It is characterized by being formed in a rotationally symmetrical shape about the intersection point P with the longitudinal middle part of the expanded part.

That is, due to the existence of a portion (hereinafter referred to as an extended portion) having a length equal to or approximately equal to the protrusion length of the plate portion, the upper plate portion can be extended over the entire range or almost the entire range in the direction of its protrusion length. Because it is supported by the plate, even when formwork is stacked in multiple stages, problems such as the stacked formwork group bending outward and tilting as in the past can be reliably prevented.
Therefore, the required strength of the shoring can be reduced, the formwork group can be maintained in the desired posture, and the concrete frame can be constructed in the desired shape.

Moreover, in order to exhibit the tilting prevention effect, the expanded portions need only be configured to be equal or approximately equal to the protruding length of the plate portion at least in the protruding length direction of the plate portion, and in the width direction of the ear portion.・Since it is not necessary to provide it across the gold mine, the increase in material can be suppressed as much as possible.

In other words, although an expanded portion is provided, the effect of material savings can be maintained sufficiently.

As a result of the synergistic effects described above, the present invention can improve the construction performance of concrete structures in the case of multi-layered formwork, reduce the amount of material required for supporting, and increase the Based on this reduction, we have been able to achieve a significant reduction in construction costs.

In particular, in forming the expanded portion, the present invention provides a flat strip plate portion having a length corresponding to the protruding length of the expanded portion, at three equal positions in the length direction, and at the same time as the width thereof. By cutting and forming a rotationally symmetrical shape around the intersection with the center line of the direction, the ear portion having such an expanded portion is formed.
Second, it is possible to obtain materials in an extremely rational manner without wasting materials (without creating parts that are unnecessary and must be thrown away), resulting in cost reductions based on the savings in materials due to this cutting method. It has the advantage of being able to achieve

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

In FIG. 1, 1 is a state in which the horizontal flat plate-shaped ear part A is inserted between the vertically opposing peripheral protruding plate parts 14, 14 of the vertically adjacent metal box-shaped concrete formwork C9C. By commonly inserting and locking pins (U clips) 16 into holes 15, 15, 1 which are bored in the same phase positions in the protruding plate parts 14, 14 and the ear part A, respectively, the protruding plate parts 14. A joint member made of steel is fixed to 14, and the protruding portion on the inner surface of the formwork C9C of this joint member J is configured as a bar connection portion B having a U-shaped vertical cross section.

1.M with its end portion fitted into the U-shaped connection part B. Any one of the plurality of pin insertion holes 1.1 formed at appropriate intervals in the longitudinal direction 11.
By inserting the pin 19 through any one of the plurality of pin insertion holes 8 formed at appropriate intervals in the longitudinal direction of the connecting portion B, the pin 19 is inserted into the connecting portion B. This is a steel intermediate bar that is connected.

Although only the left half of the separator S is illustrated because it is symmetrical, the separator S is composed of an intermediate bar 14 and a pair of joint members J, J.

The plurality of pin insertion holes 8 and the U-clip insertion holes 1 of the joint member J are formed by integrally punching out the cylindrical portions 9 and 2 by burring processing.・It is formed inside of and 2.

・3, 3 are cast concrete passing holes 5, 5 formed by punching out the cylindrical parts 4, 4 by burring on the inner side of the ear part A. The holes 5, 5 are perforated recesses for cutting the ear part. It's a groove.

The pin insertion holes 11 of the intermediate par 14 are also formed by punching out the cylindrical portions 12 by burring.

In this embodiment, the ear portion A has a portion a(
The upper half (in FIG. 2) is integrally provided.

This part a has a structure in which part a1, which is equivalent to the length of the ear part of the conventional product shown in FIG. 11A9, is further extended outward.

A notch 6 is formed in the lateral side portion in the width direction of this extended expanded portion a2, and the length thereof is a short portion corresponding to the length of the ear portion of the conventional product.

Therefore, both plate portions 14 of the adjacent formwork C9C are in contact with each other.
14, the upper part 14 is supported by the lower plate part 14 over the entire range or almost the entire range in the direction of its protruding length.

Therefore, when the formwork C... is stacked in multiple stages, the 11th
As shown by the solid line in Figure C, the stacked formwork group C... will maintain a vertical or nearly vertical posture.

When manufacturing the joint member J having the ear portion A, it is preferable to proceed as follows.

That is, as shown in FIG. 5, the length 2L, which is obtained by subtracting the length of the extended portion a2 from the length equivalent to twice the protruding length L of the plate portion 14, is provided at the intermediate portion, and the total length is , the flat strip plate 7 corresponding to the length 2Lo obtained by subtracting the length of the expanded portion a2 from twice the length of the joint member J is divided into three equal parts in the length direction and along the width direction thereof. The two raw plates 7A, 7A separated in this way are cut into a rotationally symmetrical shape around the intersection point P with the center line, and a hole 1 is formed by a purring process.
．． After forming 3.8... and attaching grooves 5..., the connecting portion B and the portion corresponding to B are bent into a U-shape to obtain two joint members J and J.

The shape of the ear portion A includes, in addition to the upper side, an inclined straight line 6' as shown in Fig. 6, and a sawtooth edge 6'' as shown in Fig. 7.
It is arbitrary, such as having .

It is preferable that these also be produced by point-symmetrical cutting similar to the means shown in FIG.

FIG. 8 shows another embodiment in which a separator S is press-worked from a single strip plate so that both ends A, A and a middle part M are integrally connected.

In FIG. 9, a separate stainless steel ear part A is joined to a steel connecting part B connected to an intermediate bar M by pins 10 and 10.

In this case as well, as shown in Fig. 10, the length 2L and the pin 10,
It is produced by cutting a strip plate 7 having a length corresponding to 10 mm into a rotationally symmetrical shape at a point P.

[Brief explanation of the drawing]

Figures 1 to 10 in the drawings show an embodiment of the structure of the ear part for a concrete separator according to the present invention. The figure is a side view of the main part, Fig. 4 is a partially cutaway front view of the main part, Fig. 5 is a schematic plan view of the ear part manufacturing means, and Figs. 6 and 7 are plan views showing modifications of the same means. , FIG. 8, and FIG. 9 are plan views of main parts according to different embodiments, respectively, and FIG. 10 is a plan view showing the manufacturing means of FIG. 9. In addition, FIG. 11A is a vertical cross-sectional view and a plan view showing the conventional one, and FIG. 11C is a schematic side view of the formwork assembly posture. 1... Hole, 7... Flat strip plate, 14.
...Peripheral protruding plate part, 16...Pin, A.
...Flat plate-like ear portion, C...Concrete formwork, L...Protrusion length of plate portion, P...Intersection point.

Claims (1)

[Scope of utility model registration request] This is a structure of a concrete separator ear part A which is in the form of a flat plate and is held and fixed through a pin 13 in a state where it is inserted between peripheral protruding plate parts 14, 14 of an adjacent concrete formwork C9C, A hole 1 for inserting a bottle 16 is formed at the center position in the width direction of the flat plate-like ear part A of the above-mentioned concrete concrete. Formed by an extended portion having a length 1 equal to or approximately equal to the protruding length L of the peripheral protruding plate portion 14 of the gauze frame (1), and a portion shorter in length than the portion 7. The extended portion The shape is formed into a rotationally symmetrical shape centered on the intersection point P between the center line along the width direction of the front port hole 11-shaped hollow part + 4 and the longitudinal middle part of the upper port extension part □!g"b. Structure of an ear for a concrete separator.