JPH051472A - Interval holding tool for concrete formwork - Google Patents

Abstract

PURPOSE:To lock and hold an interval holding tool against a concrete formwork simply and surely, and easily fit it. CONSTITUTION:In a concrete formwork interval holding tool 1 of which outside regulating pieces 3,3' are provided by upward bending both end parts of a narrow tablet like plate and inside regulating pieces 4 are provided so as to be spaced from a pair of the outside regulating pieces 3,3' by a prescribed space corresponding to the thickness of a formwork, a bendable part 7a of narrow width to easily bend on the inside regulating piece side is provided against the outside regulating piece 3. At pressing the upper part of the bendable part 7a with a finger, a wide finger support part 7b is provided for bending operation of the bendable part. A locking piece 7 to lock and hold an interval holding tool 1 to the formwork is constituted of the wide finger support part 7b and the bendable part 7a of narrow width.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete form spacing tool.

[0002]

2. Description of the Related Art A conventional concrete formwork space holder is
Both ends of the strip-shaped plate material are bent upward to provide outer regulating pieces, respectively, and the inner regulating pieces are provided at a constant distance from the pair of outer regulating pieces corresponding to the thickness of the mold.

[0003]

However, in the above-mentioned conventional concrete formwork space holder, since the concrete formwork and the space holder are simply fitted together, when the concrete formwork is not in the proper position. Had a problem that the space holder was removed from the concrete form, and the original function could not be exerted.

[0004]

According to the present invention, in order to solve the above-mentioned problems, both ends of a strip-shaped plate member are bent upward to provide outer restriction pieces. In a concrete form space retainer provided with inner regulating pieces at a constant interval corresponding to the height, a narrow bendable portion that is easily bent to the inner regulating piece side with respect to the outer regulating piece, and is provided on the upper part thereof. In addition, a means is provided in which a locking piece composed of a wide finger contact portion capable of bending the bendable portion when pressed with a finger is provided.

[0005]

Since the present invention employs the above-mentioned means, the gap holder is surely held at the proper position with respect to the concrete form by bending and engaging the engaging piece with the lower end of the concrete form. .. Further, since the locking piece is composed of the narrow bendable portion and the wide finger holding portion above it,
The finger can be locked to the finger rest and the locking piece can be easily bent with the finger.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The first embodiment of the present invention will be described below.
It will be described with reference to FIGS. In the drawings, reference numeral 1 denotes the entire spacing holder of the present invention, in which the central portion of a strip-shaped iron plate is extruded upward along the longitudinal direction by press to form a reinforcing projection 2, and both end portions are bent upward. The outer restriction pieces 3 and 3 are formed as outer restriction pieces 3 and 3, and one of the outer restriction pieces 3 is further bent inward at a right angle to form a substantially U-shaped outer restriction piece 3 '. Also, a substantially U-shaped cut is made in the reinforcing projection 2 with reference to the position spaced inward from the outer restriction pieces 3, 3 ′, and the inner restriction pieces 4, 4 are bent and bent upward.
4, the outer regulating pieces 3, 3 ′ and the inner regulating pieces 4, 4 are spaced from each other by forming form fitting portions 5, 5, and the distance is made equal to the thickness a of the forming forms 6, 6, respectively. ing. It should be noted that the through holes after the inner regulating pieces 4 and 4 are bent and bent serve as confirmation windows for confirming the concrete pouring condition when used as an upper gap holder.

Reference numeral 7 is a thin (0.4 to 0.6 mm) strip-shaped iron plate, stainless plate or the like which is welded to the lower portion of the central portion (may be left side or right side) of the outer side regulating piece 3 and is erected upward. Is a flexible locking piece made of the following, and is bent and locked by finger with respect to the upper edge of the reinforcing rib 9 which is formed by bending upward on the lower end of the mold 6, and the space holder is provided on the lower surface of the mold 6. 1 can be locked. This locking piece 7 is located in the lower part, and is provided with a narrow bendable portion 7a that easily bends toward the inner regulating piece 4 side, and is integrally provided on the upper portion thereof, and bends the bendable portion 7a when pressed by a finger. It is composed of a wide finger rest 7b that can be operated.

A nail hole 10 is provided near the center of the gap holder 1 so that the holder can be placed at a predetermined position of the base concrete. The space holder 1 is attached to the base concrete and the cloth foundation concrete forming frames 6 and 6 as follows. That is, first, concrete molds 6 and 6 are erected at a constant interval on a support frame 11 as shown in FIG.
After that, the space holder 1 is passed under the molds 6 and 6, and the U-shaped outer restricting piece 3'is hooked on the reinforcing rib 9 of the mold 6 located far away and then turned in the direction of the arrow in FIG. As shown in FIG. 3, the lower ends of the molds 6 and 6 are fitted into the fitting recesses 5 and 5, and the finger rest 7b of the locking piece 7 is put on a finger to fold it. The bent portion 7a is bent and locked to the reinforcing rib 9 side as shown by the chain double-dashed line in FIG.

Depending on the case, it is possible to use the space holder 1 downward on the upper portions of the molds 6, 6. Since the concrete is placed between the molds 6 and 6, the space holders 1 and 1 used at the bottom are consumable items that are buried as they are, and the space holder 1 including the outer restriction piece 3 '. Both ends of No. 1 are exposed, but since they are usually buried in the soil, there is no problem. Further, the space holder 1 used at the upper part is removed together with the mold frames 6 and 6 when they are removed.

In the embodiment of the present invention, a narrow bendable portion 7a which easily bends toward the inner regulating piece 4 side with respect to the outer regulating piece 3, and a narrow bendable portion 7a provided on the upper portion and pressed by a finger. Since the locking piece 7 composed of the wide finger rest 7b capable of bending the bendable portion 7a is provided, the mold space holder 1 can be securely locked and held to the concrete molds 6 and 6. In addition, the bending operation of the locking piece 7 can be performed easily and surely with a finger, so that the space holder 1 can be easily attached to the concrete formwork 6, 6.

The present invention can also be embodied as follows. As shown in FIG. 4, the inner regulating pieces 4, 4
On the other hand, the protrusion 16 is bent and bent by making a notch having a substantially U shape. The operation and effect of this embodiment are similar to those of the above embodiment. Further, in the above-described embodiment, the locking piece 7 made of a thin iron plate or the like is welded to the outer restriction piece 3, but by forming a slit in the outer restriction piece 3, a narrow bendable portion. The locking piece 7 composed of the wide contact portion 7b and the finger holding portion 7b may be integrally formed with the outer restriction piece 3. In this case, the number of parts is reduced and the structure is simplified, so that the product cost can be further reduced.

[0012]

As described above in detail, according to the present invention, since the upper end of the locking piece has the wide finger-holding portion, the mold space holder 1 can be securely attached to the concrete molds 6 and 6. In addition to being able to lock and hold, the area that hits the finger is large and force can be easily applied, and the locking pieces can be easily bent with fingers, making it easy to attach the form spacing holder to the concrete form There is an effect that can be done.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment in which a space holder is embodied.

FIG. 2 is a sectional view showing a mounting method.

FIG. 3 is a sectional view showing a mounted state.

FIG. 4 is a perspective view showing another example in which a protrusion is provided.

[Explanation of symbols]

1 spacing holder, 3, 3'outer side regulation piece, 4 inner side regulation piece, 7 locking piece, 7a bendable portion, 7b finger rest portion.

Claims (1)

Claim: What is claimed is: 1. A strip-shaped plate member is bent upward at both ends thereof to provide outer restriction pieces, respectively, and a pair of outer restriction pieces are provided inside at a constant interval corresponding to the thickness of the mold. In the concrete form space retainer provided with the regulation piece, the outer regulation piece is provided with a narrow bendable portion that easily bends toward the inner regulation piece side, and the bendable portion provided on the upper portion and pressed by a finger. A concrete formwork space holding tool, characterized in that a locking piece made up of a wide finger hold part capable of bending the part is provided.