JP2587381B2 - 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 an improvement in an interval holder for holding left and right concrete forms at a predetermined interval.

[0002]

2. Description of the Related Art Conventionally, as an interval holding tool for holding left and right concrete forms at a lower end thereof with a predetermined concrete driving space therebetween, there is, for example, one disclosed in Japanese Patent Laid-Open Publication No. 1-16843. . In this holder, an outer holding piece 2 formed by bending right and left ends of a strip-shaped metal plate 1 having a predetermined length upward at a right angle, and a side plate of a concrete form inside the outer holding piece 2. The inner holding piece 2 is formed by an inner holding piece 3 which is raised upward from the metal plate 1 at a position substantially apart from the metal plate 1 at an interval substantially equal to the length.
3 is formed so that the side plate portion of the formwork 6 is fitted into the formwork fitting section formed between the mold forms 3 to maintain the space between the left and right formwork. Then, the upper portion 5 of the outer holding piece 2 is bent to the upper end edge of the form side plate to be engaged with the elastic locking piece 4 so that the form does not easily float upward.

[0003]

In this type of space retainer, the part is exposed to the outside from the inner retaining piece 3 after the formwork is removed after the concrete work, and it is unsightly. Is cut and removed by post-processing.
However, since this cutting work is performed manually, for example, by gripping the tip of the exposed portion with a tool such as pliers and swinging up and down repeatedly, it is very troublesome and requires power, and for this type of worker, It is a very disgusting job.

Accordingly, the present invention provides a spacing device of the type described above, in which a hook piece divided by a punching slit is formed at an intermediate portion of the outer holding piece, and this hook piece is hand-wound from a narrow neck at the lower end. By making it easy to bend with, while the upper edge of the side plate of the formwork is locked by the latching piece and its lifting can be reliably prevented, when the formwork is removed after concrete construction,
After bending the hook piece, it remains as a hole for inserting a lever rod, and by inserting the lever rod from this hole, the remaining exposed part of the spacing holder is easily rocked up and down with light force and cut by It is a primary object to provide a spacing device that can be removed.

[0005]

In order to achieve the above object, the present invention takes the following technical measures. That is, in the spacing device for concrete formwork according to the present invention,
Outer holding pieces (2) and (2) formed by bending the left and right ends of the band-shaped metal plate (1) having a predetermined length upward at right angles, and inside the outer holding pieces (2) and (2). The form fitting portion is formed by the inner holding pieces (3) and (3) which are raised upward from the metal plate (1) at a position where the gap is substantially equal to the side plate length of the concrete formwork (8).
(4), a spacing holder (A) in which (4) is formed, a bendable section divided by a punching slit (5) in the middle of the outer holding pieces (2), (2) A latching piece (6) is formed, and the latching piece (6) is configured to be connected to the outer holding piece (3) by a narrow neck (7) at its lower end.

[0006]

In the above-mentioned spacing holder (A), as shown in FIGS. 2 and 3, after the spacing holder (A) is fixed on a predetermined base plate (10) with a nail (9), The side plate (8a) of the formwork (8) is fitted into the formwork fitting portion (4) formed between the inner and outer holding pieces (2) and (3), and the hooking piece ( 6) is bent downward from the neck (7) to restrict the rise of the formwork. Then, after removing the formwork after the concrete work, as shown in FIGS. 4 and 5, a lever rod (12) is inserted into a hole (11) formed after bending the latch piece (6). By swinging upward, the remaining exposed portion can be easily cut and removed from the inner holding piece (3) with a light force applied by leverage.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below based on an embodiment shown in the drawings. 1 to 6 show a spacing device according to the present invention.
1 shows a representative example of (A). The spacing holder (A) includes outer holding pieces (2) and (2) formed by bending right and left ends of a strip-shaped metal plate (1) having a predetermined length upward at right angles, and the outer holding piece. (2), inside holding pieces (3), (3) raised upward from the metal plate (1) at a position on the inner side of (2) and at an interval substantially equal to the side plate length of the concrete formwork (8) These form the form fitting portions (4) and (4). This spacing holder (A)
The material of the metal is preferably iron or steel, and the thickness of the metal plate (1) is preferably about 2 mm.

[0008] In this spacing holder (A),
A bendable hooking piece (6) divided by a punching slit (5) is formed at an intermediate portion between the outer holding pieces (2) and (2). The latching piece (6) is connected at its lower end to the outer holding piece (3) by a narrowed neck (7). In this embodiment, the slit (5) is formed in a downward C-shape, and both ends thereof are further extended downward so that the neck (7) becomes slightly longer vertically. This makes it easy to bend the hook piece (6) from the neck (7). In this embodiment, the distance from the lower end of the outer holding piece (2) to the neck (7) is about 10 mm, and the diameter of the hooking piece (6) is 10 mm. Not done.

The shape of the slit (5) is not limited to a downward C-shape, and may be formed in various forms such as a substantially triangular form as shown in FIG. 7 and a substantially quadrangular form as shown in FIG. It is possible. Further, it may be formed in a simple downward C-shaped form.

Further, in this embodiment, a break line (13) is formed near the inner holding piece (3) of the metal plate (1) so as to be easily cut along the width direction of the metal plate. This break line can be formed by perforations, V-grooves, or corrosion. By doing so, it is possible to easily cut and remove from this part in the post-processing.

As shown in FIG. 2, in the above-mentioned spacing holder (A), the spacing holder (A) is fixed to a predetermined base plate by a nail (9).
(10) After being fixed on the upper and lower holding pieces (2), the side plate (8a) of the mold (8) is fitted into the mold fitting portion (4) formed between the (3),
The hanging piece (6) is bent from the neck (7) on the upper surface of the tip of the side plate (8a) to restrict the rise of the formwork. FIG. 2 shows an example in which the end of the side plate (8a) of the formwork (8) is further bent, but even if the end of the side plate (8a) ends as shown in FIG. The upper surface of the side plate (8a) can be locked by further bending the stopper piece (6) obliquely downward.

Although the embodiments which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to the structures of these embodiments. For example, although illustration is omitted, it is preferable to form uneven strips for reinforcement on the inner and outer holding pieces (2) and (3) along the length direction. In addition, the present invention can be implemented by appropriately modifying it within the scope of providing the constituent elements, achieving the object of the present invention, and achieving the following effects.

[0013]

As described above, according to the present invention, a hook piece divided by a punching slit is formed in the middle portion of the outer holding piece, and this hook piece can be easily bent by hand from a narrow neck portion at the lower end. By doing so, while the upper edge of the side plate of the formwork is locked by the hooking piece and its lifting can be reliably prevented, the hooking piece is bent when the mold is removed after concrete construction. The rear remains as a hole for inserting a lever rod, and by inserting the lever rod through this hole, the remaining exposed part of the spacing holder can be easily rocked up and down with a light force by applying a lever to cut and remove it. There is an excellent effect that you can do.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a spacing device according to the present invention.

FIG. 2 is a cross-sectional view showing a use state of the spacing member.

FIG. 3 is a cross-sectional view showing a use state of the spacing device.

FIG. 4 is a cross-sectional view illustrating an operation of removing an exposed portion of the spacing member.

FIG. 5 is a cross-sectional view showing an operation of removing an exposed portion of the spacing member.

FIG. 6 is a side view of the spacing device.

FIG. 7 is a side view showing another embodiment of the spacing device according to the present invention.

FIG. 8 is a side view showing still another embodiment of the spacing device according to the present invention.

FIG. 9 is a side view showing another embodiment of the spacing device according to the present invention.

[Explanation of symbols]

 (1) Metal plate (2) Outer holding piece (3) Inner holding piece (4) Form fitting part (5) Punched slit (6) Hook piece (7) Neck (8) Form (A) Spacing Ingredient

Claims (1)

(57) [Claims] An outer holding piece (2) formed by bending right and left ends of a strip-shaped metal plate (1) having a predetermined length upward at right angles.
And a concrete formwork inside the outer holding pieces (2) and (2).
The metal plate is set at a position spaced apart by approximately the same length as the side plate length in (8).
The space holding device (A) in which the form fitting portions (4) and (4) are formed by the inner holding pieces (3) and (3) raised upward from (1).
A bending piece (6), which is divided by a punching slit (5) at an intermediate portion between the outer holding pieces (2) and (2).
The retaining piece (6) is connected to the outer holding piece (3) by a narrowed neck (7) at the lower end thereof, and is a spacer for a concrete formwork.