JP3295474B2 - Method and apparatus for molding concrete molded product - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for molding a concrete molded product, and more particularly to a concrete molding capable of improving the molding accuracy of a casting upper surface of a concrete molded product molded by a vertical frame. The present invention relates to a method and an apparatus for molding an article.

[0002]

2. Description of the Related Art Conventionally, for example, a sloping wall concrete pipe used for an assembling manhole cannot be formed by a centrifugal molding method like a straight wall concrete pipe. A concrete molded product was formed while vibrating the poured concrete.

[0003]

However, when a concrete molded product is molded while being vibrated by using a vertical frame as in the above-mentioned prior art, the molding accuracy of the casting upper surface of the concrete molded product is reduced. Unfortunately, there is a problem in that unevenness and the like are formed on the casting upper surface, so that the casting upper surface must be subjected to secondary processing. Therefore, conventionally, in performing the secondary processing on the upper surface of a concrete molded product, the upper surface of the concrete is manually painted or sanded with a trowel to obtain an uneven surface or the like. Have to be repaired, requiring skill, and the work is extremely complicated, resulting in poor work efficiency and high cost.

[0004] The method and apparatus for molding a concrete molded product according to the present invention is a technique developed in view of the above-mentioned conventional problems, and is used for casting a concrete molded product without performing secondary processing. The present invention relates to a completely new molding method and molding apparatus capable of improving the molding accuracy of the upper surface.

[0005]

The method for forming a concrete molded product according to the present invention is a technique which fundamentally improves the above-mentioned conventional problems, and the gist of the method is to put concrete in a vertical form. In the method of forming and molding a concrete molded article while applying vibration to the vertical formwork, the concrete poured into the vertical formwork is subjected to vibration molding, and then vertically lifted and lowered into the opening of the vertical formwork. A method for forming a concrete molded product, wherein the molding is performed while pressing the casting upper surface of the casting concrete with a press ring that can be fitted.

The gist of the apparatus for molding a concrete molded product according to the present invention is that a press ring is provided at an upper opening of a vertical form for molding a concrete molded product via a press ring fixing plate so as to be movable up and down. Further, the press ring is configured to be urged downward via a compression spring attached to a press ring fixing plate, and is a molding device for concrete molded products.

[0007]

According to the method for molding a concrete molded product according to the present invention, concrete is poured into a vertical formwork as described above.
And after shaping the cast concrete by applying vibration, the concrete is cast while pressing the upper surface of the cast concrete with a press ring that can be inserted into the opening of the vertical form so as to be able to move up and down. It is possible to form the cast upper surface of the molded concrete product extremely accurately without performing the secondary processing on the cast upper surface of the product.

[0008] As described above, in the apparatus for molding a concrete molded product according to the present invention, the press ring is provided at the upper opening of the vertical mold so as to be able to move up and down, and the compression spring is attached to the press ring fixing plate. Since the press ring is urged downward, the upper surface of the concrete to be cast in the vertical form is pressed with the press ring, and the upper surface of the concrete is accurately formed during molding of the concrete molded product. Can be molded.

[0009]

FIG. 1 is a perspective view showing the structure of a molding apparatus according to an embodiment of the present invention. FIG. 2 is a perspective view showing the configuration of the molding apparatus. FIG. 3 is a front sectional view of a main part of a structure for urging a press ring, FIG. 4 is a side sectional view of FIG. 3, and FIG. 5 is a state in which a tapered slide plate is slid from the state of FIG. It is a side sectional view.

In FIG. 1 to FIG. 4, reference numeral 1 denotes a vertical mold frame for molding a concrete molded product, and a ring-shaped opening 2 for casting concrete is provided at an upper portion thereof. . In addition, brackets 3 for mounting and fixing a later-described press ring fixing plate are provided at a plurality of locations on the upper part of the vertical formwork 1. A nut 4 is mounted in the bracket 3.

Reference numeral 5 denotes a press ring,
It is configured to be able to be fitted into the opening 2 so as to be able to move up and down. A plurality of suspension fittings 6 and a press ring fixing plate 7 are attached to the press ring 5, respectively. At both ends of the press ring fixing plate 7,
A bolt 8 that can be screwed into the nut 4 of the bracket 3 is suspended, and a plurality of compression springs 9 and a head of a suspension pin 10 are housed in a portal box 7a at the center thereof. .

The lower portion of the suspension pin 10 is
And the suspension pin 10 is urged downward by the compression spring 9. 12 is a tapered slide plate,
The upper surface has a tapered portion 12a at the center. The tapered slide plate 12 is provided with a long window through which the plurality of suspension pins 10 can be inserted. The tapered slide plate 12 is slidably inserted into the portal box 7a of the press ring fixing plate 7, and the upper surface of the tapered slide plate 12 can support the head of the suspension pin 10. It is configured to be able to.

Therefore, the tapered slide plate 1
2 is slid in the gate-shaped box 7a, and the tapered portion 12a is made into a sacrificial shape. As shown in FIG. 5, when the head of the suspension pin 10 is supported by the thin portion, the press ring 5 is moved to a lower position. Then, as shown in FIG. 4, when the head of the suspension pin 10 is supported by the thick portion, the press ring 5 is held at a high position, and is thereby driven into the vertical frame 1. The press ring 5 is configured to be able to contact or not to contact the upper surface of the cast concrete.

The method for forming a concrete molded product of the present invention using the above-described forming apparatus will be described below. First, concrete is poured into the vertical form 1 from the opening 2 thereof, and then a press ring 5 is inserted into the opening 2 of the vertical form 1 using a crane or the like to fix a plurality of press rings. The plate 7 is placed on the bracket 3 of the vertical frame 1, and the press ring fixing plate 7 is attached to the bracket 3 via the bolt 8.

At this time, as shown in FIG. 4, the head of the suspension pin 10 is supported by the thick portion of the tapered slide plate 12, so that the press ring 5 is held at a high position. In this state, the tapered slide plate 12 in the portal box is moved as shown in FIG. 5 and the head of the suspension pin 10 is supported by the thin portion of the tapered slide plate 12. Descend,
Further, since the press ring 5 is urged downward by the action of the compression spring 9, the upper surface of the cast concrete in the vertical form 1 is gradually pressed by the press ring 5, whereby the cast concrete is pressed. The molding accuracy of the upper surface of the casting can be improved.

After the cast concrete is sufficiently solidified, the tapered slide plate 12 is slid as shown in FIG. Then, the press ring 5 is removed from the opening 2 of the vertical frame 1 using a crane, and the concrete molded product can be taken out from the vertical frame 1.

The finished size of the concrete molded product can be determined by the set size of the press ring fixing plate 7, the step of the tapered portion 12a of the tapered slide plate 12, the magnitude of the compression force of the compression spring 9, and the like. The sliding timing of the tapered slide plate 12 can be changed according to external conditions such as the hardness and softness of the concrete poured into the vertical formwork 1 and the temperature and humidity at the time of placing the concrete. Furthermore, press ring 5
By changing the shape of the lower surface of the concrete molded product, the shape of the finished surface on the upper surface of the concrete molded product can be freely changed.

[0018]

The method and apparatus for molding a concrete molded product according to the present invention have the above-described configuration and operation.
Since the upper surface of the cast concrete poured into the vertical form can be formed while being pressed by a press ring that can be inserted into the opening of the vertical form so as to be able to move up and down. The installation surface can be formed with extremely high precision.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a molding apparatus.

FIG. 2 is a perspective explanatory view showing main components of the molding apparatus of FIG. 1;

FIG. 3 is a front sectional view of a main part of a structure for urging a press ring.

FIG. 4 is a side sectional view of FIG. 3;

FIG. 5 is a side sectional view showing a state where a tapered slide plate is slid from the state shown in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical formwork 2 Opening 3 Bracket 4 Nut 5 Press ring 6 Hanging bracket 7 Press ring fixing plate 7a Gate box 8 Bolt 9 Compression spring 10 Hanging pin 11 Adjustment plate 12 Taper slide plate 12a Taper part

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takehiko Noguchi 1-22-2-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Inside Haneda Hume Tube Co., Ltd. Shinjuku 1-2-22-2 Haneda Hume Kanko Co., Ltd. (56) References JP-A-58-12711 (JP, A) JP-A-54-103420 (JP, A) (58) Fields studied (Int. Cl. ⁷ , DB name) B28B 21/00-21/98

Claims (2)

(57) [Claims] 1. A method of casting concrete into a vertical formwork and shaping a concrete molded product while applying vibration to the vertical formwork, wherein the concrete poured into the vertical formwork is subjected to vibration molding. A molding method for a concrete molded product, characterized in that the molding is performed while pressing the upper surface of the cast concrete with a press ring that can be inserted into the opening of the vertical form so as to be movable up and down. 2. A press ring is provided at an upper opening of a vertical mold for molding a concrete molded product via a press ring fixing plate so as to be movable up and down, and the press ring is attached to the press ring fixing plate. An apparatus for molding a concrete molded product, which is configured to be urged downward via a compression spring.