JPH0762336B2 - Waterway manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a water channel used for a gutter, a snow ditch, etc., in particular, a synthetic resin water-permeable portion on the inner circumference of a main body formed of concrete or the like. The present invention relates to a method for manufacturing a waterway lined with.

(Prior Art) Conventionally, a water channel made of concrete has been used as a gutter and a snow drift groove, but recently, a water channel in which a synthetic resin molded product has been run is used for a water passage portion of such a water channel made of concrete. ing. Since the water passage portion of such a water passage is made of synthetic resin, water can be smoothly passed. Further, since the concrete portion supports lateral pressure such as earth pressure, the durability is excellent.

The synthetic resin molded product that constitutes the water passage portion of such a water channel,
It is preliminarily formed into a predetermined cross-section concave line by a hand lay-up method, a spray-up method, or by extrusion molding. Then, the water passage is manufactured using the water passage portion of the synthetic resin molded product that is molded into a predetermined concave shape in cross section. For example, the water passage is manufactured by using the water passage portion as a part of a concrete mold, forming a mold having a predetermined concave cross section, and pouring the concrete into the mold to cure the concrete. Also,
Separately from the water-permeable portion of the completed synthetic resin molded product, a concrete main body having a predetermined concave cross section is formed, and the water-permeable portion is adhered to the main body with an adhesive.

(Problems to be Solved by the Invention) However, in any of the above-described manufacturing methods, since the water-permeable portion of the synthetic resin molded product is previously integrally molded into a predetermined concave section, a wide space is required for this molding. is necessary. Since the water passage portion of the completed synthetic resin molded product has a concave cross section, it is bulky and requires a large space for its storage. In addition, it requires a large amount of transportation work. Since it has a concave cross section, it may be damaged during transportation.
The water-permeable portion of the synthetic resin molded product is a concrete main body portion in which sand or the like is attached to the outer surface of the molded article, or a protrusion is provided on the outer surface as disclosed in JP-B-39-14764. It is adhered directly to or via an adhesive. In both cases of direct bonding or bonding with an adhesive, the adhesiveness between the two is poor, and the water passage part of the synthetic resin molded product may separate from the concrete body part after long-term use. .

(Means for Solving Problems) The present invention is to solve the above-mentioned conventional problems, and an object thereof is to firmly bond a main body made of concrete or the like and a water passage made of synthetic resin. The purpose of the present invention is to provide a water channel, and particularly to provide a manufacturing method in which the water passage part can be easily formed, transported, and stored, and which is suitable for manufacturing a large variety of small lots.

The method for producing a water channel according to the present invention has a base and a plurality of engaging ridges arranged in parallel in the width direction on the back surface of the base and continuous in the longitudinal direction, and is fitted to one end in the width direction. By fitting and connecting the fitting projection of the band-shaped body in which the fitting projection is provided and the fitting groove is formed at the other end,
A step of forming a water-passing member formed by arranging a plurality of strips side by side, and the engaging projections are on the back side, and are substantially orthogonal to the longitudinal direction of the water-passing portion from which the strips are obtained. A step of bending the water passage member to form a water passage portion having a substantially U-shaped cross section; and a step of installing the water passage portion at the bottom of the formwork and pouring concrete into the formwork from above. It is characterized by including, and the above-mentioned object is achieved by this.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 are perspective views and cross-sectional views showing one embodiment of the present invention in the order of steps, in which 1 is a main body member, 2 is a water passage member, 22 is a water passage portion, 3 is a mold, 4 is a formwork. The water-passing member 2 is composed of a strip 21 shown in FIG.
Each strip 21 is, for example, an extruded product of a thermoplastic synthetic resin, and is provided side by side in the width direction of the strip 21 with a base 21a having a smooth surface and a back surface of the base 21a with a predetermined gap. And a plurality of engaging projections 21b, 21b, ... Which are continuous in the longitudinal direction. Each of the engaging protrusions 21b has a T-shaped cross section with a locking portion at the tip. The engaging projection 21b may have a locking portion having a circular cross section or a triangular cross section at the tip.

On the rear surface of one end in the width direction of the base portion 21a, each engaging protrusion 21b is formed.
A fitting protrusion 21c is arranged in parallel with. The mating ridge 2
The engaging portion 21d at the tip of the engaging protrusion 21b adjacent to 1c is a fitting protrusion.
It is bent to the 21c side. The other end of the base portion 21a is stepped down to form an engaging step 21h with which the end portion 21i of the base portion 21a on the side where the fitting protrusion 21c is formed can be engaged, and the back surface is formed by the thickness of the base portion 21a. Located on the side. This portion is bent toward the back side to form a fitting groove 21e so that the fitting protrusion 21c can be fitted.

A locking portion 21f having a T-shaped cross section that projects to the back side is disposed in the portion where the fitting groove 21e is formed. The fitting groove 21e
An edge portion of the base portion 21a forming the rib 21g extends toward the back side while inclining to form a rib 21g. When the fitting projection 21c of the band 21 to be connected is fitted into the fitting groove 21e of the band 21, the tip of the rib 21g is adjacent to the fitting projection 21c. The protrusion 21b is locked to the bent locking portion 21d.

Each strip 21 has such a configuration, and each strip 21
The engaging edge 21i of the belt-like body 21 to be connected to the engaging step 21h is engaged with the fitting protrusion 21c of the belt-like body 21 adjacent to the fitting concave groove 21e, and the rib 21g tip Is locked to the engaging portion 21d at the tip of the engaging projection 21b of the band-shaped body 21 to be coupled, so that the band-shaped bodies 21 are firmly flush with each other with their surfaces flush with each other. Be connected. Thus the strip
A large number of 21 are connected in the width direction to form a flat plate-shaped water passage member 2. However, the strip-shaped body used in the present invention is not limited to the above-mentioned shape, and at least one end portion in the width direction of the strip-shaped body is provided with a fitting ridge and the other end portion is fitted. It suffices to have a structure in which a groove is formed, and a plurality of engaging projections continuous in the longitudinal direction be arranged side by side in the width direction.

In the present invention, the water-passing member is not only obtained by connecting a large number of strip-shaped bodies 21 cut to a predetermined length in the width direction as described above, but also the continuous strip-shaped bodies 21 are engaged with the protrusions 21b.
Is spirally wound outside, and a pipe is formed by fitting and connecting the fitting ridges and the fitting recessed grooves of the overlapped end edges, and the pipe is formed along the axial direction. It can also be obtained by cutting with a cut surface. As shown in the plan view of FIG. 6, the water-passing member 2'obtained in this manner has the engaging projections 21b that are inclined with respect to the width direction of the water-passing member 2 ', and has a gentle cross section. It becomes an arc shape.

Next, the water-permeable member 2 or 2'obtained in this way is placed on the molding die 3 with the engaging projections 21b, 21b facing upward,
A pressing force is applied from above while heating the water-permeable member until it is plastically deformed. The molding die 3 has a substantially U-shaped cross section having an outer peripheral surface shape substantially the same as the inner peripheral surface shape of the obtained water channel, and is made of steel or the like. The water-passing member 2 or 2'is thus plastically modified along the molding die 3 to form the desired water-passing portion 22 having a substantially U-shaped cross section. As the heat treatment, it is preferable to heat the entire water-passing member 2 or 2'in a heating furnace or the like. However, by incorporating a nest 31 having a heater in the corner portion of the molding die 3, Only the bent part of 22 'may be heated.

Each band-shaped body 21 forming the water passage portion 22 is substantially orthogonal to the longitudinal direction of the water passage portion 22 formed in a U-shaped cross section.

Next, a water passage portion 22 is provided above the engaging projections 21b, 21b at the bottom of the mold 4 whose inner surface is uniformly coated with a release oil such as mineral oil so that the hardened concrete can be easily demolded. Install so that it faces outward. At this time, as shown in FIG. 2, a support member in which the water passage portion 22 is integrated with the form 4 so that the water passage portion 22 is not deformed by the poured concrete.
It is preferable to cover 41. In this way, concrete is poured into the inside of the formwork 4 in which the water passage portion 22 is installed at the bottom. Here, the concrete is generally made of sand, aggregate such as gravel, a binder such as cement, and water, but may be foamed concrete or resin concrete in addition to this.

Next, the entire mold 4 into which the concrete is poured is placed on a vibrating table (not shown) equipped with a vibrator, and vibration is applied to compact the concrete. This is carried out for the purpose of uniformly filling the concrete without forming voids in the gaps between the engaging protrusions 21b, 21b.
After sufficiently vibrating, it is allowed to stand to cure the concrete, but in order to shorten the time until demolding and speed up product shipment, 2 to 12 in a steam atmosphere of 60 to 80 ° C.
It is preferred to perform steam curing for hours.

The mold 4 is dismantled after the engaging protrusions 21b, 21b of the water passage portion 22 are fitted into the concrete main body member 1 and the said main body 1 is sufficiently cured.

Since each strip 21 that constitutes the water passage portion 22 is substantially orthogonal to the longitudinal direction of the water passage portion 22 and the engaging protrusions 21b, 21b are also substantially orthogonal, the concrete poured from above is The gap between the engaging protrusions 21b, 21b is smoothly filled.

Thus, as shown in FIG. 4 and its AA cross section in FIG. 5, the engaging projections 21b, 21 of each strip 21 are formed.
The water channel 5 in which the body member 1 is hardened in a state where b is fitted in the body member 1 and the body member 1 and the water passage portion 22 are integrally fitted.
Is obtained.

(Effects of the Invention) Since the method for producing a water channel of the present invention is configured as described above, concrete smoothly flows into the gaps between the engaging projections of the water passage portion, so that the engaging projections form the main body. A water passage can be obtained in which the water passage portion and the main body member are firmly bonded to each other by fitting into the member without any clearance.

Also, since the water passage is formed from multiple strips,
The storage space for each band becomes smaller, and since each band can be compactly packed, it is easy to carry.
There is no risk of damage to the strip during transportation.

Further, since the water passage portions having various sizes and shapes can be easily formed from one kind of band-shaped body, it is suitable as a method for producing a water channel for a large variety of small lots.

[Brief description of drawings]

FIGS. 1 and 2 are perspective views and cross-sectional views showing an embodiment of the method for manufacturing a water channel of the present invention in the order of steps, and FIG. 3 is a cross-sectional view showing an example of a strip used in the present invention. FIG. 4 is a perspective view showing an example of a water channel manufactured according to the present invention, and FIG.
6 is a plan view showing another example of the water-permeable member used in the present invention. 1 ... Main body member, 2 ... Water-passing member, 21 ... Band, 21b
...... Engagement ridges, 21c …… Engagement ridges, 21e …… Engagement groove, 22
…… Water passage, 3 …… Molding mold, 4 …… Form frame, 5 …… Water channel.

Claims (1)

[Claims] 1. A base portion, and a plurality of engaging ridges arranged in parallel in the width direction on the back surface of the base portion and continuous in the longitudinal direction, and a fitting ridge is provided at one end portion in the width direction. , A plurality of strips are arranged side by side by fitting and connecting the fitting projection of the strip having the fitting groove formed at the other end to the fitting groove. A step of forming a water member, and bending the water passing member so that the engagement protrusion is on the back side and is substantially orthogonal to the longitudinal direction of the water passing portion where the strip body is obtained, A method for producing a water channel, comprising: a step of forming a U-shaped water passage portion; and a step of installing the water passage portion at a bottom portion of a mold and pouring concrete into the inside of the mold from above. .