JPH0421931Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a formwork concrete block for construction.

(Prior Art) A concrete block for construction is composed of front and rear face shells and a plurality of web shells connecting these. A concrete formwork block is known in which a concave step is formed along the inner edge of the upper surface of the faceshell, and when this formwork concrete block is laid, the inner side of the upper and lower adjacent faceshells is formed. A horizontal groove is formed by the step at the boundary, so when filling the gap between the front and rear face shells with fresh concrete or mortar, the fresh concrete or mortar will enter the groove and create a joint. Recently, it has been attracting attention because of its formation.

(Problem to be solved by the invention) The conventional formwork concrete block for forming pour joints has a simple step-like step recessed along the inner edge of the top surface of the front and rear face shells. Since the top surface of the section is substantially horizontal,
When these formwork concrete blocks are stacked one on top of the other, the groove formed by this stepped part and the lower surface of the formwork concrete block located above has the same width at the entrance and the groove bottom, so the width of the groove is the same. There was a problem in that it was difficult for concrete or mortar to penetrate to the bottom of the groove, and voids were likely to form at the bottom of the groove, making it impossible to obtain the desired strength.

This idea allows ready-mixed concrete and mortar to easily enter the horizontal grooves formed on the inner surfaces of the adjacent parts of the upper and lower face shells, eliminates the formation of voids at the bottom of the horizontal grooves, and provides a formwork with perfect pouring joints. It provides concrete blocks.

(Means for Solving the Problems) A recessed step is formed inwardly and inclined along the inner edge of at least one of the upper and lower end surfaces of the front and rear face shells.

(Function) When masonry is carried out, the entrance groove width of the horizontal groove formed on the inner surface of the adjacent part of the upper formwork concrete block and the lower formwork concrete block becomes wider than the width of the groove bottom.

(Example) In FIGS. 1 and 2, front and rear face shells 1 and 2 are connected by two left and right web shells 3 and 3 at positions that equally divide the length direction into four, and these web shells 3 and 3 A large vertical hole 4 is formed between them, and a vertical groove 5 having a width approximately half of the vertical hole 4 is formed on the outside of the web shells 3, 3, respectively. The above-mentioned web shell 3 has an upper surface and a lower surface that are greatly recessed in a U-shape from the upper and lower surfaces of the face shells 1 and 2, respectively, and has a horizontal part 3a and a rib-like shape extending vertically from both ends thereof along the inner surface of the face shell. The horizontal portion 3a is formed into an H-shape by the portions 3b and 3c, and three lateral grooves 3d for fitting the horizontal stripes are provided on the upper surface of the horizontal portion 3a.

On the upper surfaces of the face shells 1 and 2, thin stepped portions 1a and 2a for decorative joints are formed along the front edge, and large stepped portions 1b and 2b are formed along the inner edge.
Inclined step portions 1c and 2c are formed, and the upper surfaces of these step portions 1c and 2c are inclined inwardly and downwardly, and this inclination continues to the upper end surface of the upper rib 3b of the web shell 3. There is. On the other hand, the lower surfaces of the face shells 1 and 2 are formed flat, and their horizontal surfaces continue to the lower end surface of the lower rib-shaped portion 3c of the web shell 3.

On the other hand, on the left end surface of the front face shell 1 (see Fig. 2), there is a narrow step 1d for a decorative joint along its outer edge, and a large step 1e for a driven joint along its inner edge. are respectively recessed, and a protrusion 1f that can engage with the large step 1e is provided protruding from the right end surface along the inner edge thereof. Further, on the right end surface of the rear face shell 2, there are stepped portions 1d, 1 on the left end surface of the front face shell 1.
Step portions 2d and 2e corresponding to e are recessed, and a protrusion 2f corresponding to the protrusion 1f on the right end surface of the front face shell 1 is protruded from the left end surface.

Therefore, the center portions of the face shells 1 and 2 (the portions facing the vertical holes 4) are made slightly thicker than the end portions (the portions facing the vertical grooves 5). flat grooves 1g and 2g are recessed, and vertical columnar projections 1h and 2h are provided on the inner surface of the end so as to protrude upward from the upper surface of the face shells 1 and 2, and the upper and lower blocks are When stacked in a staggered manner, the upper ends of the columnar protrusions 1h, 2h at both ends of the lower block fit in parallel to the lower ends of the flat grooves 1g, 2g at the center of the upper block.

A large number of architectural formwork concrete blocks having the above structure are stacked in a staggered manner, and the two columnar protrusions 1h and 2h that are parallel to each other at the adjacent parts of the two formwork concrete blocks adjacent on the lower side are connected to the upper formwork concrete block. It fits into the lower ends of the flat grooves 1g and 2g of the blocks to prevent the upper and lower formwork concrete blocks from shifting. Then, while placing horizontal reinforcements (not shown) in the horizontal grooves 3d of the web shell 3 as necessary, the formwork concrete blocks are stacked up to the desired height, and then the vertical holes 4 and the vertical grooves 5
When filled with fresh concrete or mortar,
The space between the steps 1e, 2e of the face shells 1, 2 and the protrusions 1f, 2f where these fresh concrete or mortar are arranged on the left and right, and the lower surface of the upper face shells 1, 2 and the lower face shell 1, 2
and the sloped step portions 1c and 2c, respectively, to form a driving joint.

In the above embodiment, the flat grooves 1g, 2g and the columnar projections 1h, 2h are not necessarily necessary and can be omitted. In addition, the above embodiment is
Slanted step portion 1 on the upper surface of face shells 1 and 2
c and 2c, but they may also be provided on the bottom surface. For example, as shown in FIG.
is provided in a concave shape, and an inclined step part 1 is provided on the inner edge of the lower surface.
m and 2m can be provided at positions deeper than the horizontal step portions 1l and 2l on the upper surface. In this case, the upper surfaces 1n and 2n of the convex portions of the face shells 1 and 2 may also be inclined. In addition, there is a horizontal groove 3 on the web shell 3.
When providing d, it is preferable to impart waterproofness to the block.

(Effects of the invention) This invention makes the steps along the inner edge of the face shell slope inward, so when filling fresh concrete or mortar after masonry, the upper and lower formwork concrete blocks are Ready-mixed concrete or mortar can be easily poured between the adjacent parts.
The driving joints are reliably formed and the strength of the structure is improved.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of this invention, FIG. 2 is a plan view, and FIG. 3 is a sectional view of a modified example. 1, 2... Face shell, 3... Web shell, 1b, 1c, 2b, 2c... Step portion on the upper surface of face shell 1, 2, 1m, 2m... Step portion on the lower surface of face shell 1, 2.

Claims (1)

[Scope of utility model registration request] In an architectural formwork concrete block consisting of front and rear face shells and a plurality of web shells connecting these, at least the upper surface of the web shell is recessed in a U-shape with respect to the end face of the face shell, the front and rear face shells are A concrete formwork block for construction, characterized in that a concave step is formed inwardly and sloped along the inner edge of at least one of the upper and lower surfaces of the shell.