JPH07110489B2 - Concrete formwork for patterning masonry - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is suitable for concrete construction for forming a pattern such as masonry on a retaining wall for river bank protection, road improvement, residential land development, steep slope collapse countermeasures, etc. The present invention relates to a concrete formwork for forming patterns such as natural masonry.

[Conventional technology]

From the viewpoint of durability, material cost, construction cost, etc., the retaining wall for various civil engineering works and flood control works has been constructed by concrete.

However, in recent years, from the viewpoint of harmony with the natural environment and ensuring a comfortable living environment, the surface of concrete, which is an inorganic material and has an artificial appearance, tends to be shunned, and the stone masonry of natural stone and the like tends to be avoided. A method of constructing concrete with a patterned appearance has been developed. Many proposals have already been made for such a construction method and a mold used for this, including, for example, JP-A-63-147606, JP-A-63-107512, and Japanese Utility Model Laid-Open No. 1-76203. ing.

The basic structure of each of these proposed techniques is that a foam made of synthetic resin has a concave portion having a pattern appearance such as a masonry on one surface and a convex portion corresponding to a joint, and the back surface is made of steel by an adhesive or the like. It uses a formwork of the type that is made of a product or attached to a wooden panel.

By the way, when concrete is poured into a mold as described above and cured, synthetic resin foams such as expanded polystyrene generally tend to adhere to the concrete side, so that it is quite difficult to remove the mold after hardening the concrete. It takes a lot of time, and the processing of the residual material is difficult. Moreover, since the synthetic resin foam adheres to the concrete side as described above,
The formwork is discarded once it is used, which is extremely uneconomical.

On the other hand, a synthetic resin vacuum-molded article having a desired appearance can be obtained by preparing a mold having a concave portion and a convex portion corresponding to a joint and vacuum-molding a synthetic resin sheet using the mold. Therefore, it is possible to achieve the intended purpose by adhering this to a steel panel and connecting and using it.

However, in the case of vacuum forming, only one side can be formed at a time, and if a surface sheet is attached separately,
Alternatively, it is necessary to perform the attachment using an auxiliary tool, which is troublesome and the manufacturing cost is high.

As described above, the conventional concrete formwork for forming patterns such as masonry has technical and economical drawbacks.

[Problems to be Solved by the Invention]

Therefore, the present invention has good releasability from cast concrete,
Further, the present invention intends to provide a concrete formwork for forming patterns such as masonry that can be repeatedly used and has excellent durability, sufficient strength, easy handling, excellent workability, and can be manufactured at low cost. .

[Means for Solving the Problems]

One of the concrete formwork for pattern formation of masonry or the like of the present invention for solving the above problems is provided with a plurality of concave portions for expressing an appearance having a pattern of masonry or the like on the surface of the cast concrete,
A concrete mold made of synthetic resin having a rib around the recess, wherein a front surface side having the surface of the recess and the rib and a back surface side having the back surface of the recess and the rib are integrally formed by blow molding. The mold is a hollow body. It is preferable that the ribs on the outer peripheral side of the mold are provided with holes for connecting the molds.

Another 1 of concrete formwork for pattern formation of masonry etc. of the present invention
One is a concrete mold made of synthetic resin, which is provided with a surface plate having a plurality of recesses for expressing the appearance having a pattern such as masonry on the surface of the cast concrete, and a side wall on the outer periphery of the surface plate. A bottom plate is provided at the lower end, and these are integrally formed by blow molding to form a hollow frame. It is preferable that the side wall is provided with a concave portion and a convex portion for frame connection.

A foam may be filled inside the hollow body of the concrete formwork for pattern formation such as the two masonry of the present invention.

A reinforcing material may be provided on the rib on the outer peripheral side of the hollow body in the concrete formwork for forming a pattern such as a masonry of the present invention.

Further, a rib may be integrally formed by projecting inwardly in the middle of the bottom plate in another pattern forming mold for masonry or the like according to the present invention.

Further, as the synthetic resin forming the hollow body in the concrete formwork for pattern formation such as the two masonry, a polyolefin resin such as polyethylene or polypropylene, a modified product thereof or a compound thereof is suitable.

[Action]

The concrete formwork for forming patterns such as masonry constructed as described above is a hollow body in which the front and back are integrally formed, so not only is the form itself lightweight and easy to handle, but the wall thickness, dimensions and shape of the front and back are also notable. With proper selection, even if it is made of synthetic resin, it has sufficient strength to withstand civil engineering work, etc., and has durability that can be used repeatedly. Further, a hollow body filled with a foam can improve the compression resistance without impairing the lightness. Furthermore, the rigidity of the mold can be improved by providing a reinforcing member on the rib on the outer peripheral side of the hollow body or integrally forming the rib in the middle of the bottom plate so as to project inward.

In addition, the synthetic resin that constitutes the hollow body, especially polyethylene,
When a polyolefin resin such as polypropylene or a modified product thereof or a compound thereof is used, it has excellent releasability from the cast concrete and the mold release becomes easy.

〔Example〕

One embodiment of a concrete formwork for patterning a masonry or the like according to the present invention will be described with reference to the drawing. As shown in FIG. 1, three rectangular recesses 1 are provided on the surface, and the recesses 1 are natural stone patterns. Is presenting. The periphery of the recess 1 is a rib 2, and the upper edge of the rib 2 is flat. The recess 1
Also, the front side 3 having the surface of the rib 2 and the back side 4 having the back surface of the recess 1 and the rib 2 shown in FIG. 2 are blown with polyethylene in a concave type E and a convex type F shown in FIGS. Formed integrally by a molding method, the form 5 is formed into a hollow body as shown in FIG. The outer peripheral ribs 2 are provided with formwork connecting holes 6 at regular intervals after blow molding as shown in FIG.

Another embodiment shown in FIG. 4 is one in which the foam 7 is filled in the form 5 of the hollow body shown in FIG. As the foam 7, urethane foam, expanded polystyrene,
Foamed phenol and the like are preferable.

In another embodiment shown in FIG. 5, a reinforcing member 8 is provided on the rib 2 on the outer peripheral side of the hollow frame 5 shown in FIG.

The concrete formwork for pattern formation such as masonry shown in Figs. 1 and 2 configured as described above is the same as a normal steel formwork at the construction site of the concrete structure, for example, the construction site of the steep slope collapse prevention work. Similarly, as shown in FIG. 6, they are arranged in a zigzag manner, the bolts are inserted into the frame connecting holes 6 of the ribs 2 adjacent to each other on the adjacent outer periphery, and the nuts are tightened to assemble the stone pattern panel 11, and the thick timber is used. Hold by 12 etc. In this assembly, the form 5
Since is a hollow body, it is lightweight and easy to carry, handle and work. Then, the masonry pattern panel 11 is set at a predetermined angle as shown in FIG. 6, and concrete (not shown) is placed inside thereof. In this concrete casting, the mold 5 is made of polyethylene, but since the front and back are integrally formed hollow bodies, it has sufficient strength and does not deform. Therefore, if the formwork 5 is peeled off after the concrete is hardened, the earth retaining wall with high dimensional accuracy as shown in FIG.
14 are built. And on the surface of the earth retaining wall 14, formwork 5
The recessed portion 1 forms a raised portion 15 with a natural stone pattern,
A masonry pattern 16 is formed on the entire surface of 14.

In constructing the earth retaining wall 14 of this masonry pattern, the concrete formwork 5 in which the foam body 7 is filled in the hollow body shown in FIG.
By using, it is possible to improve the compression resistance without impairing the lightness.

Further, by using a highly rigid concrete formwork 5 in which a reinforcing material 8 is provided on the ribs 2 on the outer peripheral side of the hollow body shown in FIG. 5, it is possible to rigidly join the formwork 5 in a staggered arrangement. The deformation of the assembled stone pattern panel 11 can be prevented.

Next, another embodiment of the concrete formwork for forming patterns such as masonry according to the present invention will be described with reference to the drawing. As shown in FIG. 8, a surface plate 20 having three recesses 1a on the surface thereof, A side wall 21 is provided on the outer periphery of the surface plate 20, and a bottom plate 22 is provided at the lower end of the side wall 21 as shown in FIG. 9, and these surface plate 20, side wall 21, and bottom plate 22 are integrally formed by blow molding of polypropylene,
A hollow body form 23 is configured. The mold 23 is provided with a recess 24 and a protrusion 25 for connecting the molds on the opposite side walls 21 so that the adjacent molds fit together.

Another embodiment shown in FIG. 10 is a hollow formwork shown in FIG.
23 is filled with the foam 7.

Another embodiment shown in FIG. 11 is a formwork of a hollow body shown in FIG.
A rib 26 is integrally provided in the middle of the bottom plate 22 of 23 corresponding to the joint 20a in the middle of the surface plate 20 so as to project inward.

The concrete formwork for pattern formation such as masonry shown in FIGS. 8 and 9 configured as described above is the same as a normal steel formwork at a construction site of a concrete structure, for example, a construction site for a steep slope collapse prevention work. As shown in FIG. 12, the upper and lower parts are arranged vertically, and the recesses 24 and the protrusions 25 of the adjacent side walls 21 are fitted, and the vertically arranged parts are arranged left and right to form the recesses 24 of the adjacent side walls 21. The projections 25 are fitted to each other, the masonry pattern panel 27 is assembled and held by the edge thick material 12 and the like. In assembling the masonry pattern panel 27, since the formwork 23 is a hollow body, it is lightweight and easy to carry, handle and work. Then, the masonry pattern panel 27 is set at a predetermined angle as shown in FIG. 12, and concrete (not shown) is placed inside thereof. In the casting of the concrete 13, the mold 23 is made of polypropylene, but since the surface plate 20, the side wall 21, and the bottom plate 22 are hollow bodies integrally formed, they have sufficient strength and do not deform. .
Therefore, when the formwork 23 is peeled off after the concrete is hardened, the earth retaining wall 14 with high dimensional accuracy is built as in FIG. Then, a convex portion 15 having a natural stone pattern is formed on the surface of the earth retaining wall 14 by the concave portion 1a of the mold 23, and a masonry pattern 16 is formed on the entire surface of the retaining wall 14.

In the construction of the earth retaining wall 14 of this masonry pattern, by using the concrete formwork 23 in which the foam body 7 is filled in the hollow body as shown in FIG. 10, the compression resistance is improved without impairing the lightness. Can be achieved.

Further, as shown in FIG. 11, a rib is provided in the middle of the bottom plate 22 of the hollow body.
By using a highly rigid concrete formwork 23 in which 26 is projected inward and integrally provided, deformation of the masonry pattern panel 27 assembled by arranging the formwork 23 vertically and horizontally can be prevented.

Incidentally, the concrete formwork for pattern formation such as the masonry of the present invention,
Basically, it is used in the same way as an ordinary steel form, but when constructing a concrete slope with a pattern such as a large masonry, it is attached to the formwork base and reinforced, and a masonry pattern panel is assembled. It is good to do so. At this time, the concrete formwork is fixed to the formwork base with an adhesive, or the bolts are inserted through the bolt insertion holes that are opened around the surface of the concrete formwork and the nuts are screwed in. Tighten and connect the concrete formwork and the formwork base.

〔The invention's effect〕

As can be seen from the above description, the concrete formwork for pattern formation of masonry or the like of the present invention is a hollow body made of synthetic resin, so it is lightweight and easy to carry and handle, and the wall thickness, dimensions and formation are appropriately selected. By doing so, it has sufficient strength and has durability that can be repeatedly used. Further, a hollow body filled with a foam improves the compression resistance without impairing the lightness. In addition, the ribs on the outer peripheral side of the hollow body are provided with a reinforcing material, and the ribs that are integrally formed by projecting the ribs inwardly in the middle of the bottom plate improve the rigidity of the formwork, and masonry etc. assembled during concrete placement. The deformation of the pattern panel can be reliably prevented. Further, when the synthetic resin forming the hollow body is a polyolefin resin such as polyethylene or polypropylene or a modified product thereof, the friction coefficient is small and the surface becomes smooth, so that the peelability from the cast concrete is improved. , Easy to remove from the mold.

Furthermore, since the concrete formwork for pattern formation such as masonry of the present invention is a hollow body or a hollow body filled with a foam, it has excellent heat insulation properties and has a concrete structure with a pattern such as masonry even in cold regions. You can build things.

[Brief description of drawings]

FIG. 1 is a perspective view showing one embodiment of a concrete formwork for forming patterns such as masonry according to the present invention, and FIG. 2 is A- in FIG.
A sectional view taken along the line A, and FIGS. 3A and 3B are diagrams showing a method for manufacturing a concrete formwork for pattern formation such as masonry shown in FIGS. 1 and 2, FIGS. 4 and 5.
FIG. 6 is a sectional view showing another embodiment, and FIG.
Fig. 7 is a perspective view showing a state in which a masonry pattern panel is assembled by a concrete formwork for forming a pattern such as a masonry, Fig. 7 is a perspective view showing an earth retaining wall on which a masonry pattern is formed, and Fig. 8 is a diagram showing the present invention. FIG. 9 is a perspective view showing another embodiment of a concrete formwork for forming patterns such as masonry, FIG. 9 is a sectional view taken along the line BB of FIG. 8, and FIGS. 10 and 11 are other embodiments. FIG. 12 is a perspective view showing a state in which a masonry pattern panel is assembled by the concrete formwork for forming a pattern such as a masonry shown in FIGS. 8 and 9. 1, 1a ... Recess, 2 ... Rib 3 ... Front side, 4 ... Back side 5 ... Formwork, 6 ... Formwork connection hole 7 ... Foam, 8 ... Reinforcing material 20 ... Surface plate, 20a ... Joint 21 ... Side wall, 22 ... Bottom plate 23 ... Formwork, 24 ... Recess 25 ... Protrusion, 26 ... Rib

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kiyoshi Matsui 5-17-1 Takanodai, Nerima-ku, Tokyo

Claims (6)

[Claims] 1. A synthetic resin concrete formwork provided with a plurality of recesses on the surface of a cast concrete for expressing an appearance having a pattern such as a masonry, and ribs around the recesses. A concrete mold for forming a pattern such as a masonry, characterized in that a front surface side having a front surface and a back surface side having the back surface of the recess and the rib are integrally formed by blow molding to form a mold body into a hollow body. frame. 2. A concrete mold made of synthetic resin, comprising a surface plate having a plurality of recesses for expressing an appearance having a pattern such as masonry on the surface of the cast concrete, and a side wall on the outer periphery of the surface plate. A concrete formwork for forming a pattern such as a masonry, characterized in that a bottom plate is provided at the lower end of the side wall, and these are integrally formed by blow molding to form a formwork of a hollow body. 3. A concrete formwork for forming a pattern such as a masonry according to claim 1) or 2), wherein the hollow body is filled with a foam. 4. The concrete formwork for forming a pattern such as a masonry according to claim 1, wherein a reinforcing material is provided on a rib on the outer peripheral side of the hollow body. 5. The concrete formwork for forming patterns such as masonry according to claim 2) or 3), wherein ribs are integrally provided so as to project inwardly in the middle of the bottom plate of the formwork of the hollow body. 6. The masonry or the like according to any one of claims 1) to 5), wherein the synthetic resin constituting the hollow body is a polyolefin resin such as polyethylene or polypropylene, or a modified product or compound thereof. Concrete formwork for pattern formation.