JPS586668Y2 - Formwork for concrete block molding - Google Patents

Description

[Detailed explanation of the invention] This invention is a concrete block for manufacturing stacked blocks used for bank protection in river construction, earth retaining in road and railway construction, bank protection in reclamation work, etc. This relates to a mold for molding.

Traditionally, instead of constructing masonry retaining walls using 90% masonry stone, Nomen stone, etc., we mass-produce masonry blocks using mechanical fabrication.
It is known to construct masonry retaining walls using such stacked blocks.

By the way, stacked blocks are manufactured using a formwork for forming concrete blocks, and conventionally a single formwork has been used and manufactured by two methods: the so-called immediate demolding method or the pouring method.

The so-called instant demolding method applies pressure to the concrete of the North Ramp while applying vibrations, and as soon as the shape of the product is completed, only the side walls that make up the formwork are removed, and the product is placed on the bottom wall and placed in a designated location. The product is moved to the bottom wall, collected in multiple pieces, steam-cured for a certain period of time, and after the required strength is achieved, the product is removed from the bottom wall, sorted, and stocked.

In such a case, a large number of bottom walls are required for the side walls of the set, and these many bottom walls move in a cycle of placing place → curing place → demolding place → placing place, and the demolded product also moves. It is necessary to move them one by one to the stockyard and organize them.

However, the effort required for this movement is extremely large.

In addition, in this method, the side wall is removed before the product has completely hardened, so the height of the product becomes lower due to the weight of the product itself after the side wall is removed and until the curing is completed. Generally, the dimensions of the joint end become larger accordingly.

The allowable value according to JIS is within +5 mm, but with the instant demolding method, it is not only difficult to keep it within this allowable value, but even products that are within the allowable value have large variations in dimensions at the joint end. has become an obstacle.

During construction, the joints are stacked together, but due to variations in dimensions, there is a difference between the designed number of stages and the actual number of stages, and adjustments must be made at some point.

Therefore, construction efficiency is extremely low, and masons with excellent skills are required.

For this reason, there was a drawback that the construction costs were high.

Next is the pouring method, which has good dimensional accuracy because the product is cured along with the mold.

The formwork used in the conventional pouring method is a single formwork, which consists of a bottom plate and a set of side walls for each product.

However, in this pouring method, after pouring concrete, the formwork is moved to a curing area, cured, molded, and then returned to the pouring area and poured again, and this work is performed for each concrete piece. Because it is necessary, the efficiency of production is inferior to the method using immediate demolding, and it is necessary to organize the product.

Good results were not obtained regarding product stock.

In addition, the cost of the formwork is large compared to the production cost, and a large amount of space is required for production, making the production cost too high compared to the advantage of dimensional accuracy.
The instant demolding method could not be said to be superior from a practical standpoint, and improvements were required.

Thus, this invention was devised to eliminate such conventional drawbacks, and this invention will be explained below based on the embodiments shown in the drawings.

FIG. 1 is a perspective view showing a formwork for forming concrete blocks according to this invention.

In the drawings, reference numeral 1 indicates a substrate.

The substrate 1 is made of a rectangular parallelepiped plate, and a plurality of approximately box-shaped grooves 2 are formed in the upper surface of the substrate in the longitudinal direction.

Further, numerals 3 and 3 indicate both side walls.

The side walls 3, 3 are rotatably supported on both sides 4, 4 of the substrate 1 at one side thereof.

That is, both side walls 3, 3 are connected via a hinge-like connector 5,
It is attached to both sides 4, 4 of the board 1, and the both side walls 3
, 3 can be tilted up and down from one side.

By the way, partition plates 6 protruding from the side walls 3 are formed on both side walls 3, 3 so as to face each other and come into contact with each other.

A plurality of partition plates 6 are formed at equal intervals along the longitudinal direction of the side wall 3.

When both side walls 3, 3 are rotated and closed, the substrate 1
A plurality of outer molds can be formed by the side walls 3, 3 and the partition plates 6, 6.

Further, a pair of partition plates 6.6 facing each other from the side walls 3, 3 are formed with a tapered slope from the base end 7 to the tip 8, and both sides of the partition plate 6 have slopes 9.
, 9.

In the above, the state of use of the formwork according to this invention will be explained.

First, in the formwork in the state shown in FIG.
Close it to the state shown in Figure 2.

At this time, both side walls 3, 3 are tightly closed using a plurality of fasteners 10.

Thereafter, concrete is poured into each of the plurality of outer molds.

After curing, the mold is removed, and this invention has particularly excellent effects during demolding.

That is, as described above, the partition plates 6 according to this invention are each formed with a tapered slope from the base end 7 toward the distal end 8, and both sides of the partition plate 6 are formed as slopes 9, 9. .

Therefore, the fasteners 10... are removed, and both side walls 3 are removed.
, 3, the slope of the partition plate 6 becomes the slope of the opening, and the mold can be easily removed.

Incidentally, FIG. 3 shows another embodiment of the formwork according to this invention.

The formwork in Fig. 3 has the following characteristics when both side walls 3, 3 are closed:
A removable separation partition wall 11 is interposed between the partition plate 6 and the groove portion 2 of the substrate 1 at the abutment part, and it is easier to demold when both side walls 3 are opened after concrete pouring. This is how it was done.

The formwork shown in Fig. 1 or 3 is for forming 10 pieces of stacked blocks, but molds for forming 3 pieces and 5 pieces can be formed using the same structure as described above. I don't mind.

Thus, this invention consists of the above structure.

The formwork according to this invention has the following effects.

■ The molding of the formwork according to this invention is extremely simple, and in the 10-cavity formwork shown in the above example,
By tightening the side walls at three locations with the fasteners 10, the mold can be completely assembled.

With conventional single-piece molds, a total of 20 or more molds were required to be tightened to assemble 10 molds.

Therefore, with this formwork, the time required for mold assembly can be significantly reduced compared to the conventional method.

■ This formwork eliminates the need for extra space, so the space required for curing can be minimized.

■ Demolding of this formwork is performed by opening both side walls and lifting the product upwards using a crane-type demolding tool. The process of demolding → sorting and restocking can be greatly shortened compared to the conventional method.

■ Conventional single formwork required a bottom wall to be prepared, but the formwork developed with this invention has multiple grooves that serve as the bottom wall fixed on the top surface of the substrate, which makes it easier to There is no difference in product dimensions, and there are excellent advantages in terms of construction.

[Brief explanation of drawings]

The drawings show an embodiment of this invention; Fig. 1 is a perspective view of the formwork with both side walls open, Fig. 2 is a perspective view of the formwork with the formwork assembled, and Fig. 3 is a perspective view of the formwork with both walls open. It is a perspective view which shows another Example of a formwork. 1...Substrate, 2...Groove, 3...
... Side wall, 4 ... Side edge, 5 ... Connector, 6 ... Partition plate, 7 ... Base end, 8 ...
...Tip, 9...Slope, 10...
Fastener, 11...Separation partition wall.

Claims (1)

[Scope of utility model registration request] It consists of a substrate having a plurality of substantially box-shaped grooves formed in the longitudinal direction, and both side walls that are rotatable on both sides of the substrate and pivoted on one side. A plurality of opposing partition plates are formed, and the substrate and both side walls,
A mold frame capable of forming a plurality of outer molds with a pair of partition plates facing each other from the both side walls, each of the pair of partition plates facing each other from the both sides having a tapered shape from the base end to the tip. A formwork for forming concrete blocks characterized by being formed with a slope.