JPS5830803B2 - Concrete block molding method and molding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a forming method for producing a thin concrete molded quantity such as a concrete block for earth retention, and a forming apparatus for carrying out the method. 2, and a side view of another embodiment is shown in FIG.

In the figure, 1 is a vertical adjustment plate, 2 is an inclined bottom plate, 3 is a reinforcing rib, 4 is a side edge, and 5 is a protrusion on the side edge or a groove that fits into the side edge.

The intersection angle of the vertical adjustment plate 1 and the inclined bottom plate 2 is normally 105°, and when used, they are mutually protruding, and without fitting the grooves 5, the side edges 4 are closely connected and connected, and the back surface of the concrete block (reinforcing rib surface)
Provides a function as a boundary wall of a developed area, etc., without requiring foundation work.

Therefore, construction work is simplified, land can be used more effectively with thin-walled blocks,
It has a lot of utility value because of the ease of modification work.

However, on the other hand, the vertical adjustment plate 1 may reach a height of 2 m depending on the application, and must have sufficient pressure resistance and seismic resistance against natural disasters.

Furthermore, there are many issues in mass production in a factory, such as the fact that the surface of a vertical hard board is necessarily aesthetically pleasing depending on the application.

Next, the conventional molding method and molding apparatus for the concrete block are typified by the invention disclosed in Japanese Patent Publication No. 51-44009.

The summary is as shown in Fig. 3, a mounting plate 7 formed in the shape of reinforcing ribs and having an air vent hole 9 is mounted on a molded bed 6 surrounded by a rectangular frame, and the vertical part of the mounting plate 7 is A formwork is constructed by joining together the vertical plate parts 8, and after applying a mold release agent, fresh concrete is poured from a hopper 10 while giving appropriate vibrations.

After that, cover the formwork with vinyl etc. and heat it with saturated steam.
Forced heat curing is applied for ~3 hours.

In this molding method, the mold is closed and it is difficult to apply a mold release agent.

・Since the thermal stress deformation of the formwork caused by forced heating and the direction of the gravity of the fresh concrete 'J-p overlap in the direction of the arrow in Figure 3, the reinforcing ribs of the concrete block and the connection of the vertical plate and the inclined bottom plate are Cracks are likely to occur in the parts, and the strength is significantly reduced.

・When pouring fresh concrete, vibration is applied to the formwork for the purpose of defoaming residual air and homogenizing the composition, but since the formwork is closed, it is difficult to judge the appropriate amount of vibration, and the residual air or bone Often causes material separation and strength defects.

・It is difficult to demold and transport after molding, making it unsuitable for mass production of hot water.

・Since the surface of the vertical plate is in close contact with the formwork installation surface, decorative treatment methods for improving the appearance of the iron surface are extremely limited.

There are important drawbacks such as: In view of the above, it is an object of the present invention to eliminate the drawbacks of the prior art and to provide a new production method suitable for mass production of hot water and an apparatus based thereon.

First, the molding method of the present invention will be explained in detail.

An embodiment of this method is shown in FIGS. 4 to 6.

In the figure, 11 is the mold part of the formwork, 14 and 15 are rib molding grooves configured to correspond to the reinforcing ribs on the back of the vertical straightening plate and the inclined bottom plate, 12 is the leg part, and 13 is the vibration that is removably engaged. It is a vessel.

Normally, a formwork is used for concrete forming, but in the present invention, as shown in Fig. 4, the formwork is made so that the surface of the vertical plate after forming is the top surface and is almost horizontal, and the inclined bottom plate is made to hang down almost. Arrange.

Only the horizontal upper surface of the formwork will be left unused, and all other surfaces will be enclosed in a rectangular shape depending on the shape.

Next, a mold release agent is sprayed on the inside of the form, and separately framed reinforcing bars are inserted and set in place.

Molding is carried out by filling the formwork with fresh concrete from the opening in the horizontal upper surface while applying vibration to the entire formwork using a vibrator 13.

Adjust the amount of vibration while checking the defoaming and dehydration status of the filled horizontal part.

Further, depending on the application, the surface of the vertically leveled plate can be decorated by any means selected and freely applied during the curing process in the fresh concrete formwork.

Before or after this treatment, cover the entire formwork with vinyl etc.
Cured by steam heating for ~3 hours to shorten demolding time and increase production cycle.

The effects of the method of the present invention are: - The formwork is open and has a large horizontal opening, making it easy to apply a mold release agent, and the concrete block can be demolded smoothly.

- Due to the physical structure of the formwork, the thermal stress strain of the formwork is opposite to the direction of gravity of the fresh concrete, so substantial deformation is extremely reduced and the above-mentioned cracks do not occur.

- Since the condition of the fresh concrete on the surface of the horizontal opening can be accurately judged visually, the appropriate amount of vibration can be adjusted without requiring special skill to prevent the occurrence of strength defects.

- Since the surface of the vertically leveled plate can be decorated as described above, the concrete block can be produced with a low floor and beautiful appearance, and the uses of the block can be widened.

The above is accepted.

Next, a molding apparatus for implementing the method of the present invention will be described based on examples.

(Explanation of matters already described will be omitted.) One embodiment is shown in FIGS. 4 to 10.

16 is a side plate of the formwork, 18 is a holding plate, 19 is a reinforcing material, and 20 is a circular hole for providing a through hole for transportation attached to the concrete block.

As shown in FIGS. 7 and 8, the mold section 11 is provided with grooves 14 and 15 for forming reinforcing ribs for the concrete block, and the grooves are tapered to facilitate demolding.

Further, the mold part 11 is made of a steel plate with a thickness of 2 to 3 wear in consideration of deformation, and the groove parts 14 and 15 are formed by press working.

On the other hand, the hanging part of the forming mold part 11 is integrally equipped with a side plate 11' surrounded by a frame corresponding to the side edge of the inclined bottom plate, and similarly, the horizontal part consists only of the groove part 14 and the bottom plate, and has a thickness equivalent to that of the vertical straightening plate. The enclosed side plate portion is not constructed integrally.

On the other hand, a presser plate 18, which serves as a frame for forming the surface of the inclined bottom plate of the hanging portion, is locked so as to be detachable in the direction of the arrow in FIG.

In addition, E and F are used as frame enclosures equivalent to the thickness of the vertical hardboard side edges.

The side plate portion 16 is removably locked in the G direction.

Although not shown in the drawings, the side plate portion 16 is provided with a strip corresponding to the protrusion 5 or the groove 5 as necessary.

The locking is done by a conventional means such as a set bolt, but the side plate 16 may be pivoted using a hinge 17 as shown in FIG. 7 so that it can be freely released in the direction of the arrow.

Furthermore, as shown in FIG. 10, the guide mold part 11 is constructed and fixed to the leg part 12 having a curved part 21 so as to be able to roll against a fixed surface.

The leg portions 12 are reinforced using round bars.

Although not shown, a square plate is inserted into the central rib groove on the back of the mold part 11, and a push bolt mechanism is attached to the iron plate by operating the push bolt from outside the mold part 11 to move the iron plate upward. It may provide a mechanism to promote the release of pressed concrete.

The forming apparatus having the above configuration is filled with ready-mixed concrete and the above-mentioned construction method is applied.

Note that a round rod is inserted through the circular hole 20 to form a through hole.

After 8 to 24 hours of filling the fresh concrete, the round bar is removed, the side plate part 16 and the holding plate part 18 are opened, and the mold part 11. A blow is applied to the leg portion 12 to promote release of the concrete.

Next, when an external force such as human power is applied to the leg portion 20 as shown in FIG. 11, a moment due to gravity acts on the concrete block, and the block is easily rotated and demolded, automatically as shown in the figure. Layering the sloped bottom plates in a narrow space allows for smoothing.
can be completely cured as is.

The forming equipment is moved back approximately 0.3 meters in increments and immediately begins preparation for the next pour, effectively repeating the production cycle.

The molding apparatus of the present invention not only has the effects of implementing the above-mentioned new molding method, but also has the unique feature that there is no need for demolding and transport using special transport means as in the past, and the accompanying damage and vast space can be saved. It has the effect of

As detailed above, the two inventions of the present application enable efficient and stable production of thin-walled concrete blocks of uniform quality and high level stability with a low defect rate. It has useful value, such as making it possible to perform multi-purpose cosmetic treatments and expanding the range of applications.

[Brief explanation of drawings]

FIG. 1 is a perspective view of one embodiment of a concrete block for earth retention, FIG. 2 is a side view of another embodiment, and FIG. 3 is a perspective view showing a production method according to the prior art. FIG. 4 is a front view of the molding apparatus according to the present invention, FIG. 5 is a plan view of the mold section, and FIG. 6 is a side view. 7 is a sectional view of the forming apparatus AN, FIG. 8 is a sectional view BB', FIG. 9 is a perspective view of the side plate, and FIG. 10 is a perspective view of the presser plate. Further, FIG. 11 is a front view showing a demolded state according to the present invention. Explanation of main symbols: 1 indicates a vertical adjustment plate, 2 indicates an inclined bottom plate, 11 indicates a mold section, 16 indicates a side plate section, 18 indicates a presser plate section, and 12 indicates a leg section.

Claims (1)

[Scope of Claims] 1. A method for forming a thin concrete block in which a vertical straight plate and an inclined bottom plate are arranged in a substantially L-shape, and a reinforcing rib is provided on the back surface of the thin concrete block, which is configured according to the shape of the concrete block. The ready-mixed concrete pouring form is placed so that the surface of the vertical leveling plate is approximately horizontal and the inclined bottom plate is substantially hanging down, and the ready-mixed concrete is poured into the form while applying vibration to the formwork. A method for forming a concrete block, characterized by pouring from the horizontal opening of a frame and curing the concrete by forced heating. In the molding method according to item 21, the mold part is configured according to the shape of the back rib of the concrete block,
It consists of a combination of a side plate part corresponding to the wall thickness of the vertically leveled plate and a pressing plate part corresponding to the surface of the inclined bottom plate, and the side plate part and the pressing plate part are removably attached to the mold part, and the mold part is arranged. A molding device for carrying out the molding method, characterized in that it has a leg portion having a curved portion that rolls the concrete IJ-dob in the direction of demolding against a surface.