JPS63931Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a concrete form spacing holder.

Generally, the spacing holders at the bottom end of the formwork for fabric foundation concrete are placed on the top surface of the base concrete, so two outer regulating pieces and two inner regulating pieces are erected at each end of the holder body. However, the top surface of the base concrete is not necessarily flat, and as a result, a gap is formed between the spacing fixture and the bottom surface of the fabric foundation concrete formwork, and the fabric foundation concrete against the outer regulating piece of the spacing fixture is not flat. Point of action (contact point) at the bottom end of the formwork
The defect was that the spacer would move upwards, thus significantly reducing the strength of the spacer.

In an attempt to solve the above defects,
As shown in Publication No. 23832, the upper part of one of the outer regulating pieces of the spacing holder is bent inward in a dogleg shape to form an elastic locking protrusion in order to lock it to the formwork. The upper part of the other outer regulating piece is bent inward at right angles to prevent the spacing retainer from separating from the fabric foundation concrete formwork, or the outer regulating piece has a transparent locking hole and is attached to the fabric foundation concrete form. There was also a type in which the spacing holder was lifted by locking the lower end of a spring that was hooked to the top of the formwork. However, in the former, there is still a slight gap between the formwork and the spacing holder due to manufacturing and installation errors in the formwork or spacing holder, and in the latter, gaps are difficult to form, but when the structure is multiple There was a problem that manufacturing was difficult and the cost of the product was high.

The purpose of the present invention is to solve the above problems, to be able to reliably hold the spacing holder in a predetermined position relative to the formwork even if there are manufacturing or installation errors in the formwork or the spacing holder, and to The object of the present invention is to provide a simple and inexpensive concrete formwork spacing holder.

Hereinafter, an embodiment embodying the present invention will be explained with reference to Figs. 1 and 2. In the drawings, reference numeral 1 indicates the entire spacing retainer of the present invention, and the central part of the rectangular iron plate is shown along the longitudinal direction. The reinforcing protrusion 2 is formed by extrusion molding upward with a press, and both ends are bent upward to form outer regulating pieces 3, 3, and a position at a constant distance inward from the outer regulating pieces 3, 3 is the reference point. A substantially U-shaped cut is made in the reinforcing protrusion 2 and bent upward to form the inner regulating pieces 4, 4. The distance between the outer regulating pieces 3, 3 and the inner regulating pieces 4, 4 is set as formwork fitting portions 5, 5, and the distance therebetween is made equal to the thickness a of the formworks 6, 6, respectively. Note that the through hole formed after bending and raising the inner regulating pieces 4, 4 becomes a window for checking the concrete placement status when used as an upper spacer.

7 can be made of a thin (0.4 to 0.6 mm) strip-shaped iron plate, etc., which is welded to the upper part of the inner surface of the outer regulating pieces 3, 3 at its wide side 7a and provided in a horizontally elongated shape in the width direction of the outer regulating pieces 3. A locking piece having flexibility, the formwork 6,
6. Bend both sides 8 of the locking piece 7 inward in the lateral direction with your fingers, as shown in FIG. The narrow side 7b of the spacer 7, that is, the lower edge thereof, is engaged with the upper edge of the reinforcing rib 9, so that the entire spacing holder 1 can be engaged with the lower surface of the molds 6, 6. In addition,
A nail hole 10 for installing the spacing holder 1 at a predetermined position in the base concrete B is provided near the center of the spacing holder 1.

Now, the spacer of the present invention is used in the following manner.

That is, first, the spacing holders of the present invention are arranged at appropriate intervals on the base concrete B, and the lower ends of the formworks 6, 6 are fitted into the fitting parts 5, 5 on both sides. The spacing between the formworks will be kept exactly constant. Thereafter, both sides 8 of the locking piece 7 are bent inward as shown by the two-dot chain line in FIG. Lock the holder 1.

Depending on the case, it is also possible to use this spacer 1 downwardly on the upper part of the formworks 6,6.

Since the concrete is cast between the formworks 6, 6, the spacing holders 1, 1 used at the bottom become consumable items that are buried as they are, and the spacing holders 1, 1 including the outer regulating pieces 3, 3 become consumables. Both sides of 1 and 1 are exposed, but this is not a problem since they are usually buried in the ground. Further, the spacer 1 used in the upper part is removed all at once when the formworks 6, 6 are removed.

Now, in the embodiment of the present invention, the flexible locking pieces 7, 7 are welded to the inner surfaces of the outer regulating pieces 3, 3 at their wide surfaces 8, 8. It can be bent inward and locked from any part in the middle just above the upper edges of the reinforcing ribs 9, 9 of the formworks 6, 6. Therefore, the unevenness of the upper surface of the base concrete B causes the formworks 6, Even if the installation position is crooked or there is a manufacturing error in the reinforcing ribs 9, 9, the spacer 1 can always be locked in a securely abutting state against the lower surface of the formworks 6, 6. Also,
Even when the reinforcing ribs 9, 9 are locked on the narrow surface 7b of the locking piece 7 and a bending moment is applied to the locking piece, the section modulus on the narrow side 7b of the same width is larger than the section modulus on the wide side 7a. Therefore, deformation is unlikely to occur.

Figures 3 to 5 show a second embodiment, in which one of the pair of outer regulating pieces 3, 3' is approximately U-shaped so that it can be hooked to the lower end of the formwork. It is formed into a shape. In this embodiment, the formwork 6
The U-shaped outer regulating piece 3'
After locking, rotate in the direction of the arrow in Fig. 4 so that the lower ends of the forms 6, 6 are fitted into the formwork fitting parts 5, 5 as shown in Fig. 5, and then lock. Both sides 7a of the piece 7 are bent inward as shown by the two-dot chain line in the same figure so as to be above the reinforcing rib 9 and locked.

6 and 7 show a third embodiment, in which locking pieces 7 are provided on the outer surfaces of both outer regulating pieces 3, respectively, in the width direction.

8 and 9 show a fourth embodiment, which differs from the first embodiment in that only one side 8 of both locking pieces 7 is bent inward.

By the way, when the locking piece 7 is provided only on one side, the inner regulating piece 4 on which the locking piece 7 is provided may be omitted. That is, if the locking piece 7 is present, even if the inner regulating piece 4 is not present, the tip of the locking piece 7 can be further bent downward to grasp the upper edge of the reinforcing rib 9 of the formwork 6, thereby allowing the formwork to be secured. This is because relative movement of the spacer 6 and the spacer in the vertical and lateral directions can be prevented.

On the contrary, when the locking piece 7 is provided only on one side,
If the inner regulating piece 4 on which the locking piece 7 is not provided is omitted, it is inconvenient because a relative movement in the lateral direction between the formwork 6 and the spacer holder will occur.

In this way, the present invention provides an outer regulating piece by bending both ends of a strip-shaped plate upward, and a locking piece that is fixed in a horizontally elongated manner to the outer or inner surface of at least one of the pair of outer regulating pieces. When the locking piece is laterally protruded from the fixed part and the locking piece is bent laterally inward, the lower edge of the locking piece can lock the upper end of the lower edge of the formwork, making it possible to manufacture and install the formwork. Even if there is an error, the spacer can always be reliably locked in the correct position with respect to the same mold, and the structure can be simplified to reduce the cost of the product.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the spacing retainer of the present invention, FIG. 2 is a sectional view showing the same in use, and FIG. 3 is a perspective view showing a second embodiment of the present invention. Figures 4 and 5 are cross-sectional views showing the same state of use, Figures 6 and 7 are plan views and central vertical cross-sectional views respectively showing the third embodiment, and Figures 8 and 9 are the fourth embodiment. FIG. 2 is a plan view and a vertical cross-sectional view of a central portion showing an example. Spacing holder 1, locking piece 7, wide surface 7a, narrow surface 7b.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Both ends of a rectangular plate are bent upward to provide outer regulating pieces, and a horizontally oblong shape is fixed to the outer or inner surface of at least one of the pair of outer regulating pieces. A concrete mold characterized in that a locking piece projects laterally from the fixing portion, and when the locking piece is bent laterally inward, the lower edge of the locking piece can lock the upper end of the lower edge of the formwork. Frame spacing holder. 2. The concrete form spacing holder according to claim 1, wherein the locking pieces are respectively attached to opposing inner surfaces of a pair of outer regulating pieces. 3. The concrete form spacing holder according to claim 1, wherein the locking piece is formed to be strong enough to be bent directly with fingers.