JPH0470455B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method of manufacturing a gutter block having drainage holes.

(b) Conventional technology Conventionally, as shown in Fig. 7, gutter blocks a
The drain hole b is provided at a predetermined location on the upper side surface, but the outer opening end b-1 of the drain hole b is larger than the inner opening end b-2, and the inside surface b-
3 is formed in a tapered surface that tapers inward.

The method for forming the block is to attach the core for the drain hole to the upper formwork, and remove the upper formwork above the gutter block a formed within the formwork, thereby forming the drain hole b. The core of the mold to be formed can be easily removed from the mold.

However, in the case of the drain hole b, the outer opening end b-1 is large, and the inner opening end b-2 is larger than that.
Due to the small size of the holes, gravel c and the like tend to enter and become clogged, causing the problem that the drain hole b no longer functions as a drain.

Therefore, a gutter block was devised in which the drain hole formed in the upper side of the gutter block is formed in a reverse tapered shape with a narrow outer opening end and a wide inner opening end to prevent clogging with gravel and the like.

(c) Problems to be Solved by the Invention However, in the method for forming gutter blocks described above, in order to easily form drainage holes, an inverted tapered shape is formed on the upper surface of the gutter block forming mold and the lower surface of the form. A core for the drainage hole is provided protrudingly, and in such a state, the outer opening end of the drainage hole is narrower than the inner opening end of the concrete poured into the formwork, so the core connected to the upper formwork is I couldn't pull it out upwards.

For this reason, a gutter block having a clogging prevention function cannot be manufactured by integral molding, and has not yet been implemented.

(d) Means for Solving the Problems In the present invention, (a) front, rear, left and right side molds are attached to the periphery of the upper surface of the long rectangular plate-shaped bottom plate form 5 that forms the upper surface of the hollow cylindrical gutter block. Assemble the frames to form a formwork with an open top; (b) protrude from the upper side of the bottom plate formwork a plurality of rod-shaped fitting protrusions at intervals in the longitudinal direction; A plurality of drain hole cores each having a tapered surface with a circumferential surface gradually tapering toward the lower end are fitted into the fitting protrusion, and (c) a side groove having a hollow cylindrical cross section is installed on the cores. (d) placing an internal formwork forming the hollow part of the block, and forming a block forming space between the internal formwork and the front, left and right side formworks and bottom plate formwork forming the above-mentioned formwork; Concrete is poured into the block forming space, and then cured for a certain period of time to form a gutter block in the same block forming space. At the same time as removing the formwork, remove the inner formwork from the center of the gutter block, (f) Remove the core for the drain hole from the gutter block in the direction of the hollow part of the gutter block, and open the outer opening in the upper side of the gutter block. The present invention provides a method for manufacturing a side gutter block having a drain hole, which comprises the steps described above, for manufacturing a side gutter block having a drain hole whose end is narrower than the inner open end.

(e) Effect In the present invention, the front, rear, left, and right side formwork are assembled on the periphery of the upper surface of the bottom plate formwork, and concrete is poured into the block forming space between the formwork and the inner formwork, thereby forming a hollow cylindrical shape. In order to form a gutter block, a core for the drain hole is fitted into a rod-shaped fitting protrusion provided on the upper side of the bottom plate formwork, and the internal formwork is placed on the same core. A gutter block having a drainage hole communicating with the hollow part is formed in the gutter block.

In addition, since the core has a tapered surface that gradually tapers toward the lower end, when the molded gutter block is reversed,
The outer open end of the upper surface of the gutter block is formed narrower than the inner open end, and a drain hole is integrally formed therein to prevent clogging with gravel or the like.

In addition, to remove this core, after curing, remove the front, rear, left, and right side formwork from the formwork and the internal formwork to form a hollow part of the gutter block, and then turn the circumferential surface of the core toward the lower end. Since the core is formed into a tapered surface, when it is removed from the fitting protrusion of the bottom plate formwork, the core can be easily removed in the direction of the hollow part.

(F) Effect According to the present invention, since the core for the drain hole attached to the protrusion provided on the inner surface of the bottom plate form is formed in a reverse tapered shape, it is easy to remove the core from the bottom plate form. At the outside, by removing the inner formwork and easily removing it in the direction of the hollow part of the gutter block formed, the outer opening end is made narrower than the inner opening end by integral molding. Hole gutter blocks can be manufactured.

(G) Embodiments The embodiments of the present invention will be explained in detail based on the drawings.
In the side view of FIG. 1, A indicates a gutter block, and the gutter block A is formed entirely of concrete into a vertically elongated rectangular cylindrical shape, and has a hollow portion S in the center. A longitudinal drainage hole H is provided at a predetermined location on the upper side portion 1 in a direction perpendicular to the longitudinal direction of the block A.

The gutter block A communicates the upper outside with the internal space via the drain hole H.

Further, the drain hole H has an outer opening end H-1 smaller than an inner opening end H-2, and a peripheral side surface H-3 thereof is formed into a tapered surface that gradually tapers outward.

Therefore, the formwork M for forming the above-mentioned gutter block A is constructed as follows.

That is, as shown in FIG. 5, the formwork M includes an internal formwork 2 which becomes the hollow part S of the gutter block A, front and rear and left and right side formworks 3, 3, 4, 4, a bottom plate formwork 5, and a water The core 6 for punching holes constitutes a block forming space.

The bottom plate form 5 is formed into a left and right longitudinal rectangular plate shape, and has a required number of fitting protrusions 7 protruding from predetermined positions on the upper side surface 5-1, and a drain hole core 6 is attached to the protrusions 7. They are mated.

The core 6 has a circumferential surface 6-1 formed into a tapered surface tapered toward the lower end, and a fitting space 10 is vertically provided inside the core 6, and the fitting protrusion 7 is connected to the fitting protrusion 7 through the space 10. The cores 6 are configured to be detachable, and adjacent cores 6 are integrally formed via a continuous plate 8.

A drain hole H is formed in the upper side part 1 of the side gutter block A which is formed in an up-and-down state by each core 6.

Further, on the outer periphery of the upper surface of the bottom plate form 5, front, rear, left and right side form frames 3, 3, each formed in the shape of a thin rectangular plate, are provided.
4, 4 are removably fitted together, and the formwork M is formed into a left and right longitudinal box-like rectangular shape with an open top. 2
The gutter block A is formed by placing the gutter block A in a lying position and supplying concrete from the upper opening of the formwork M into the block forming space.

Further, removal holes 9, 9 having a shape opposite to the shape of the internal formwork 2 are provided in the center portions of the front and rear side formworks 3, 3, and both ends of the internal formwork 2 are fitted into the removal holes 9, 9. At the same time, the internal mold 2 is held in the mold M.

Then, at the time of demolding, the front and rear side molds 3, 3 are removed, and then the internal mold 2 is removed.

Therefore, the work of assembling the formwork M involves assembling it into a vertically elongated box-like rectangular shape with an open top end using the front, rear, left and right side formworks 3, 3, 4, 4 and the bottom plate formwork 5. The drain hole core 6 is fitted into the provided fitting protrusion 7 through the fitting space 10, and the inner formwork 2 is placed on the connecting plate 8 of each adjacent core 6, and the front and rear side formworks are It is placed in the removal holes 9, 9 of No. 3, 3 with both ends thereof inserted.

After the concrete has hardened in the block forming space, the demolding work first involves removing the front, rear, left and right side formworks 3, 3, 4, 4, and the internal formwork 2.
is pulled out through the extraction hole 9, and the molded side gutter block A is lifted up by a lifting device or the like and removed from the bottom plate formwork 5, placed in a predetermined place, and the connecting plate block A is removed from the hollow part S. Core 6 for drain hole through 8
.

At this time, the upper side part 1 of the gutter block A is formed at a lower side position facing the bottom plate formwork 5, and in the same state, the drain hole H is formed so that the inner opening end H-2 is connected to the outer opening end H-2. -1, and allows the drain hole core 6 to be removed from the inside of the hollow part S.

With this method, the core for the drainage hole, which has a tapered surface at the bottom end on the side surface, is removably attached to the protrusion provided on the inner surface of the bottom formwork, so that it can be removed after concrete is poured and hardened. , the internal formwork is removed to form a hollow part inside, and the hollow part allows the hollow part to be removed in the direction of the hollow part, making the outer opening end narrower than the inner opening end. It is possible to integrally manufacture a gutter block with a drain hole.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of a gutter block according to the present invention. FIG. 2 is a sectional view taken along the line -- in FIG. 1.
FIG. 3 is a plan view of the same block. FIG. 4 is an enlarged sectional view of the main part. FIG. 5 is an explanatory diagram of demolding the same block. FIG. 6 is a sectional view taken along the line -- in FIG. 5. 7th
The figure is a conventional explanatory diagram. a: Gutter block, H: Drain hole, H-1: Outside opening end, H-2: Inside opening end, 2: Internal formwork,
3: Front and rear formwork, 4: Left and right formwork, 6: Drain hole core, 7: Fitting protrusion.

Claims (1)

[Scope of Claims] 1 (a) On the periphery of the upper side of the long rectangular plate-shaped bottom plate form 5 forming the upper surface of the hollow cylindrical gutter block, front, rear, left and right side formworks 3, 3, 4, Assemble 4,
A formwork M is formed with an open upper part, and (b) a plurality of rod-shaped fitting protrusions 7 are protruded from the upper side of the bottom plate formwork 5 at intervals in the longitudinal direction, and the fitting protrusions 7 are provided at intervals in the longitudinal direction. A plurality of cores 6 for drainage holes are fitted into the mating projections 7, and the circumferential surface 7-1 is tapered gradually toward the lower end. The inner formwork 2 forming the hollow part S of the side gutter block having a shaped cross section is placed, and the front, rear, left and right side formworks 3, 3, 4, 4 and the bottom plate formwork 5 forming the above-mentioned formwork M, Formwork 2
(d) pour concrete into the block forming space, then cure for a certain period of time and form gutter blocks in the same block forming space; (e) form gutter Front, rear, left and right side formworks 3, 3, 4, which constitute formwork M from the front, rear, left and right sides of the block.
At the same time, remove the inner formwork 2 from the center of the gutter block. A method for manufacturing a side gutter block having a drain hole, which comprises the steps described above, for manufacturing a side gutter block equipped with a drain hole H whose outer opening end is narrower than the inner opening end.