JPH0957735A - Form for producing catch basin and production thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a durable steel form in a factory by an easy method and to obtain inexpensively a catch basin with variety of required design dimensions by constituting integrally an inner form and an outer form made of steel and pulling out each form directly upward when the forms are released. SOLUTION: At first, by constituting an inner form A and an outer form B not as a separation type but as a monolithic type each with four sheets of steel sheets 1, the steel forms A and B can be divertadly and in addition, by pulling out each form A and B directly upward by means of a lift T, the work can be performed safely and efficiently because assembling and dismantling of heavy forms as separation type are unnecessary. In addition, when several kinds of inner forms A and outer forms B each with different inner diameters are prepd. and they are assembled each other and a template K with a required shape and dimension of a connection hole of a drain pipe is set at an arbitrary position between inner and outer forms A and B to prepare a catch basin with a required design.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for manufacturing a water collecting box installed in drainage construction, and a method for manufacturing a water collecting box using the frame.

[0002]

2. Description of the Related Art In construction work such as road construction or residential land development, drainage gutters are installed for the purpose of draining rainwater and the like.
A water collecting box is installed at the confluence of the drains. The water collecting box is installed by the following method, which is generally called "Okauchi". First, on a flat ground around the installation site on the site, using wooden plywood, create a wooden formwork as designed. Then, after applying a release agent inside, concrete is poured and hardened. After curing, the wooden form is stripped off with a crowbar or the like to obtain a finished product of the water collecting box as designed. Then, the water collecting box is hung by a mobile crane, a backhoe or the like and moved to be installed at an installation place.

This conventional method of manufacturing a water collecting box using a wooden form has an advantage that water collecting boxes having various design dimensions can be obtained on site. However, in the civil engineering industry, which has the problem of a decrease in the number of workers such as carpenters, the work is becoming difficult because the formwork is complicated and requires skill. In addition, since each wooden box must be made with a wooden form, the material cost of the plywood used for the form is incurred, and as a result, it is recorded as a form loss and the design price of the water collection box is increased. It was relatively expensive. In addition, shape distortion, quality difference of individual boxes, loss due to crowbars during deframing, etc. are unavoidable. Moreover, the wooden plywood used for the formwork can be used only once, so it is discarded each time. It was disposed of and wasted wood resources.

On the other hand, Japanese Utility Model Publication No. 61-171 introduces an assembling steel frame, which discloses that the water collecting box can be easily and inexpensively manufactured. However, since it is an assembly type, the framework and disassembling work of a heavy steel formwork are both complicated and dangerous. Moreover, the problem of concrete leakage from the joint was inevitable during repeated use. Further, it was difficult to form drainage pipe holes on the side surface of the water collecting box according to each design.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is disposable in each of the boxes at the site like the conventional method for making a water collection box at the site. By making an easy method using a durable steel mold in a factory without making a mold, we will try to provide a water collecting cell of various required design sizes at low cost. To do.

[0006]

The present inventor has conducted various studies and researches on a technique for producing a water collecting box, and as a result, the method of producing using a form shown below is the most efficient and the most cost effective. We obtained the knowledge that it can be manufactured. That is, the mold for producing a water collecting box of the present invention is composed of an inner mold and an outer mold made of steel, and each mold is an integral type rather than a separate type. Further, it is characterized in that each mold is pulled out right above when removing the frame.

More specifically, the inner and outer molds are shown in FIG.
As shown in (4), four steel plates are integrally welded, and a steel material such as a mountain steel is welded to the inner peripheral portion or the outer peripheral portion for reinforcement. The inner mold and the outer mold are each provided with an engaging portion of a lifting device so that they can be lifted when removing the mold. Further, in order to facilitate extraction, a release agent may be applied to the inner surface of the mold, or a synthetic resin release plate may be installed. Also, a connection hole for the water collection pipe is formed on the side surface of the water collection box, which is a die-cutting tool having a desired shape and size of the connection hole between the inner and outer molds before pouring concrete. It is formed by setting the material in advance and removing the die-cut material after hardening the concrete. The die-cut material is fixed to a predetermined side surface at a designed position by bolts passed through several bolt holes formed on the side surfaces of the inner and outer molds. The unused bolt holes are plugged with bolts or the like.

[0008] The above-mentioned inner and outer molds are fixed to a pedestal, a release agent or the like is applied if necessary, a mold-extracting material is set, and then concrete is poured between the inner and outer molds to a designed height. To cure. After curing, a hanging machine is used to pull out the inner mold form and the outer mold form directly above, respectively, and the mold cutting material is removed to obtain a finished product of the water collecting box.

[0009]

According to the present invention, first, the inner mold and the outer mold are not separated, but are formed integrally with four steel plates, so that the steel mold can be reused many times. Furthermore, by pulling each formwork directly above with a suspender, it is not necessary to perform heavy frame work and dismantling work unlike the conventional separate mold, so safe and efficient work is possible. It has become possible.

Further, several kinds of inner molds and outer molds having different inner diameters are prepared and combined with each other, and a die-cut material having a desired shape and size of the connection hole of the drainage pipe is used for the inner and outer molds. By setting it at any position between the frames, it was possible to manufacture water collection boxes of almost any design with different sizes and wall thicknesses. Therefore, according to the present invention, it is possible to efficiently manufacture a water collecting box having less shape distortion and individual quality difference in accordance with a required design in a factory, not in a site where quality control is difficult.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. A in FIG. 1 shows an inner mold of the mold for producing a water collecting box of the present invention. Inner form A is 3m thick
It is preferable to use four steel plates 1 of about m in length, and if it is too thin, it will be deformed by the pressure of the poured concrete, and if it is too thick, it will have excessive strength and will be too heavy. The four steel plates 1 are welded as shown in the figure to form a frame body, and the mountain steel 2 and the H-shaped steel 3 are reinforced from the inside of the frame body. The reinforcing member is provided with an engaging portion 4 for hooking a hook 5 of the lifting device T. Although the engaging portion 4 is formed by forming a hole in the reinforcing member in the drawing, it may have any shape as long as the hook can be hooked. Further, several bolt holes 6 for fixing the die-cutting material K having a shape and a size for forming the connection hole of the water collecting pipe are provided on each side surface of the mold.

B in FIG. 1 shows an outer mold of the mold for producing a water collecting box of the present invention. Similarly to the inner mold A, the outer mold B preferably uses four steel plates 1 having a thickness of about 3 mm. The four steel plates 1 are welded as shown in the figure to form a frame,
Reinforce with the angle steel 2 and the H-shaped steel 3 from the outside of the frame. The reinforcing member is provided with an engaging portion 4 for hooking a hook 5 of the lifting device T. Also, on each side of the formwork, the inner formwork A
Similarly to the above, several bolt holes 6 for fixing the die-cutting material K are provided.

FIG. 2 shows a pedestal for mounting the inner mold A and the outer mold B. The pedestal is configured to be supported by the chevron steel 10 in order to easily and firmly install the formwork. First, the inner mold A and the outer mold B described above are set on a pedestal, and if necessary, fixed using a tightening tool so as not to leak.

Then, in order to facilitate the frame removal, an oil-based release agent is applied to the inner and outer molds. Alternatively, a release plate made of expanded polystyrene is installed. Since the styrene foam release plate is disposable, it is preferably made of a synthetic resin such as a vinyl chloride plate and has durability.

Next, a die-cutting material K having a shape and size for forming a connection hole of the water collecting pipe at a desired position.
Are fixed with bolts from the inner and outer formwork. As the die-cutting material K, a material such as Styrofoam that can be easily removed without being soaked with concrete is preferable. Then, the unused bolt holes 6 are all plugged with bolts or the like. When the installation of the formwork is completed, concrete is poured between the inner and outer formwork molds to the desired height, and waits for hardening.

After curing, after removing all the bolts, the hooks 5 of the hanging machine T are hooked on the engaging portions 4 of the inner mold A and the outer mold B and pulled out right above, respectively, and the die-cutting material K is drawn. A finished product of the water collection box is obtained by removing the. Further, several kinds of inner molds A and outer molds B having different inner diameters are prepared, respectively, and each of them is combined, and a die-cutting material K having a desired shape and size of the connection hole of the drainage pipe is formed on the inner and outer molds. By setting it at an arbitrary position between the frames, it is possible to manufacture water collecting boxes of almost any design having different sizes and wall thicknesses.

[0017]

As described above, according to the water collecting box making frame and the water collecting box making method of the present invention, each of the molds is pulled out right above the hanging machine. Unlike the separate type, since there is no need for heavy formwork and dismantling work, there is little danger associated with work, and safe and efficient work is possible. Furthermore, at the same time, the plywood material cost, which was generally recorded as formwork damage charges, is not incurred at the same time. Since it can be efficiently manufactured according to the required design, as a result, it is possible to manufacture the water collecting box at a low cost, and it is possible to provide the water collecting box which is significantly cheaper than the conventional one.

[0018]

[Brief description of drawings]

FIG. 1 shows a mold for producing a water collecting box of the present invention.

FIG. 2 shows a pedestal on which the mold for producing a water collecting box of the present invention is installed.

[Explanation of symbols]

A: Inner form, B: Outer form, T: Lifting device, K: Die-cutting material.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B66C 1/66 9528-3F B66C 1/66 P E03F 5/10 E03F 5/10 A

Claims (2)

[Claims] 1. A mold for producing a water collecting box, characterized in that each of the inner mold and the outer mold is integrally formed of a steel plate, and an engaging portion of a lifting device is provided on each mold. frame. 2. The mold for producing the water collecting box according to claim 1,
A method for producing a water collecting box, characterized in that a lifting device is engaged, and the frame is pulled out right above to remove the frame.