JPH10166340A - Shuttering for concrete product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to efficiently set a gas-permeable sheet to be arranged along the lower face of a top form to be installed on the upper part of a bottom form and, make the gas-permeable sheet easily detachable. SOLUTION: This shuttering 11 for a concrete product consists of a bottom form 12 with a lateral form part 15 provided on the periphery of a bottom plate part, a top form 13 which is set on the upper part of the bottom form 12 and has the lower face side recessed upward forming a curved face 13a, and a gas-permeable sheet 17 which is arranged along the curved face 13a of the top form 13 and removes a bubble generated above a formed concrete. In addition, fitting piece parts 19 are formed on the curved face 13a near both end parts in the longitudinal direction of the top form 13. Further, the gas- permeable sheet 17 is arranged along the curved face 13a of the top form 13. Both end parts of the long band-like elastic support plate 18 are arranged along the curved face 13a of the top form 13 by fitting the end parts into the fitting piece parts 19 respectively. Next, the gas-permeable sheet 17 is supported by holding it between the curved face 13a and the support plate 18, and then is arranged along the lower face 13a of the top form 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete product formwork for producing concrete products by molding concrete.

[0002]

2. Description of the Related Art Generally, when a concrete product having a curved surface such as a segment constituting a cylindrical wall such as a tunnel is manufactured, as shown in FIG. The upper formwork 3 which is the surface 2 is installed, concrete is poured into the concrete placing space S surrounded by the lower formwork 1 and the upper formwork 3, and after the concrete is cured and cured, the concrete is removed. I was By the way, when manufacturing the concrete secondary product as described above, a ventilation sheet made of cloth, non-woven fabric, or the like is installed on the lower surface side of the upper mold frame 3 for the purpose of removing air bubbles generated in the upper part of the poured concrete. I was

[0003]

The upper mold 3
Since the lower surface side is the curved surface 2, it is possible to simply hold the ventilation sheet between the upper mold frame 3 and the upper end of the horizontal mold frame portion 4 constituting the side wall of the lower mold frame 1. For this reason, the ventilation sheet is attached to the lower surface side of the upper mold frame 3 with, for example, an adhesive or a double-sided adhesive sheet. In this case, the attachment work of the ventilation sheet requires a great deal of labor. In addition, there is a problem that the work of removing the ventilation sheet from the upper mold frame 3 after the production requires a great deal of work, and further, the ventilation sheet is partially peeled off and loosened, and the quality of the product is reduced. Could cause problems.

The present invention has been made in view of the above circumstances, and it is very easy to install a ventilation sheet on the lower surface side of a curved surface of an upper mold to manufacture a high quality concrete product. The aim is to provide a formwork for possible concrete products.

[0005]

In order to achieve the above object, a concrete product form according to claim 1 comprises a lower form having a horizontal form around a bottom plate, and a lower form. On the upper part of the, has an upper form that is installed via a ventilation sheet that removes air bubbles generated in the upper part of the cast concrete,
A concrete product mold for manufacturing a concrete product by casting and curing the concrete in a concrete casting space surrounded by the lower mold frame and the upper mold frame, wherein the upper mold frame is The lower surface is a curved surface depressed upward, and a long strip-shaped support plate having elasticity and both ends supported by the upper mold is provided on the upper mold along the curved surface. The ventilation sheet is sandwiched between the support plate and the curved surface of the upper mold frame, and is disposed along the curved surface of the upper mold frame.

A concrete product form according to claim 2 is the concrete product form according to claim 1, wherein
It is characterized in that both ends of the support plate are respectively locked and supported by locking pieces protruding from a curved surface of the upper mold frame. A concrete product form according to a third aspect is the concrete product form according to the first or second aspect, wherein a plurality of the support plates are arranged at intervals.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete product formwork according to an embodiment of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 11 denotes a mold for manufacturing a concrete product having a curved surface such as a segment constituting a cylindrical wall such as a tunnel. The mold 11 has a lower mold 12 and an upper mold 13 attached to an upper portion of the lower mold 12. The upper mold 13 has a curved surface 13a whose lower surface is depressed upward. It has been.

The lower mold frame 12 is composed of a bottom plate (not shown) and a horizontal mold frame 15 erected around the bottom plate. Concrete is poured into the enclosed concrete placing space S. The horizontal frame portion 15 is composed of end plates 15a erected on both ends of the bottom plate portion and side plates 15b erected on both side portions of the bottom plate portion.
The upper mold frame 13 has a curved shape protruding at the same curvature as the curved surface 13a. That is, when the upper mold 13 is attached to the upper part of the lower mold 12, the horizontal mold 1
The upper end of the side plate portion 15b that constitutes the portion 5 contacts the curved surface 13a of the upper mold frame 13 in the longitudinal direction.

As shown in FIGS. 3 and 4, the curved surface 13a of the upper mold frame 13 has elasticity and water resistance and heat resistance (about 50 to 100 ° C.) along its longitudinal direction. A plurality of strip-shaped support plates 18 made of, for example, a metal plate or a plastic plate are provided at intervals in the width direction of the upper mold frame 13. Both ends of the support plate 18 are locked and supported by locking pieces 19 formed on the curved surface 13 a near both ends of the upper mold frame 13. In this manner, air bubbles generated above the concrete poured into the concrete placing space S are provided between the support plate 18 whose both ends are supported by the locking pieces 19 and the curved surface 13a of the upper mold frame 13. Of the upper mold 13 is attached along the curved surface 13 a of the upper mold frame 13.

Then, the upper mold 1 constituting the mold 11 is formed.
When attaching the ventilation sheet 17 to the third, first, the ventilation sheet 17 is disposed along the curved surface 13a of the upper mold frame 13,
In this state, as shown in FIG. 5, while bending each support plate 18 to the side opposite to the curved surface 13a of the upper mold frame 13,
The both ends are locked to the locking pieces 19 respectively. As described above, when the support plate 18 is locked,
Are partially deformed by pushing them into the upper mold frame 13 side. In this way, these support plates 18
As shown by an alternate long and short dash line, by bending the whole, and further pushing it into the upper mold frame 13, the bending direction of the support plate 18 becomes the upper mold frame 13 side. Are supported along a curved surface 13a of the upper mold frame 13 while the ventilation sheet 17 is sandwiched and held between the support plate 18 and the curved surface 13a of the upper mold frame 13. It is arranged along the lower surface 13a.

Thus, the curved surface 13a of the upper mold frame 13 is
After arranging the ventilation sheet 17 along, the concrete is poured into the concrete placing space S surrounded by the lower mold frame 12 and the upper mold frame 13, and hardened and cured.
A concrete product having a curved surface is formed. At this time, air bubbles generated in the upper part of the poured concrete are reliably removed by the ventilation sheet 17. The ventilation sheet 17 is entirely formed of the upper mold 1 by a plurality of support plates 18.
3 is held on the curved surface 13a, so that it is possible to reliably prevent the deterioration of the quality of the concrete product due to the loosening of the ventilation sheet 17 during concrete hardening and curing.
When the concrete product is formed as described above, the upper mold frame 13 is removed, and the concrete product is removed from the lower mold frame 12 and taken out.

As described above, according to the concrete product mold 11, the curved surface 13a of the upper mold 13 is formed.
A ventilation sheet 17 is disposed along the long strip-shaped support plate 1.
8 is bent to the opposite side to the curved surface 13a, and both ends thereof are supported by the locking pieces 19 of the upper mold frame 13. In this state, the respective support plates 18 are pushed into the upper mold frame 13 to push the upper plate 13 upward. By simply bending the ventilation sheet 17 toward the mold frame 13, the ventilation sheet 17
8 and the curved surface 13 a of the upper mold frame 13, can be sandwiched by the support plate 18 and disposed along the curved surface 13 a of the upper mold frame 13. That is, the work of attaching the ventilation sheet 17 can be performed extremely easily, and the work efficiency can be greatly improved.

Further, since the ventilation sheet 17 is held in the longitudinal direction by a plurality of support plates 18 provided in the width direction of the upper mold frame 13, it is possible to reliably prevent the ventilation sheet 17 from being loosened. By doing so, it is possible to reliably prevent the deterioration of the quality of the concrete product due to the looseness of the ventilation sheet 17. That is, a high quality concrete product can be manufactured. Further, when the ventilation sheet 17 is removed from the upper mold frame 13 after the production of the concrete product, the support plate 18 only needs to be deformed in a direction in which the support plate 18 is separated from the upper mold frame 13 in a direction opposite to that at the time of attachment.
The operation of removing the ventilation sheet 17 can be performed extremely easily as compared with the case where the ventilation sheet 17 is attached to the curved surface 13a of the upper mold frame 13 using an adhesive or a double-sided adhesive sheet.

[0014]

As described above, according to the concrete product formwork of the present invention, the following effects can be obtained. According to the concrete product form of claim 1, a ventilation sheet is provided along the curved surface of the upper mold in a state where the support plate is curved to a side opposite to the curved surface of the upper mold, Simply press each support plate into the upper mold side and bend it toward the upper mold side, and let the support plate sandwich the ventilation sheet between the support plate and the curved surface of the upper mold frame, and curve the upper mold frame. It can be arranged along the plane. That is, the work of attaching the ventilation sheet can be performed extremely easily, and the working efficiency can be greatly improved. In addition, since the ventilation sheet is held in the longitudinal direction by the support plate, it is possible to reliably prevent the ventilation sheet from being loosened, thereby reliably reducing the deterioration of the quality of the concrete product due to the loosening of the ventilation sheet. Can be prevented. That is, a high quality concrete product can be manufactured. In addition, when the ventilation sheet is removed from the upper mold after manufacturing the concrete product, the support plate only needs to be deformed in a direction to separate from the upper mold in a direction opposite to the mounting, so that, for example, an adhesive or a double-sided material is used. The operation of removing the ventilation sheet can be performed extremely easily as compared with the case where the ventilation sheet is attached to the curved surface of the upper mold frame using the adhesive sheet.

According to the concrete product form of the present invention, both ends of the support plate are engaged with the locking pieces of the upper form while bending the support plate in a direction opposite to the curved surface of the upper form. The support plate can be mounted on the upper mold simply by stopping, and the support plate can be removed from the upper mold simply by removing both ends of the support plate from the locking pieces. According to the concrete product form of the third aspect, since the plurality of support plates are arranged at intervals, the entire ventilation sheet can be held on the curved surface of the upper mold form by the plurality of support plates. it can.

[Brief description of the drawings]

FIG. 1 is a sectional view of a mold for explaining a concrete product mold according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of a mold for explaining a concrete product mold according to an embodiment of the present invention.

FIG. 3 is a perspective view of the upper mold for explaining the structure of the upper mold constituting the concrete product mold according to the embodiment of the present invention.

FIG. 4 is an AA cross-sectional view of the upper mold for explaining the structure of the upper mold constituting the concrete product mold according to the embodiment of the present invention.

FIG. 5 is a perspective view of the upper mold for explaining how to attach a ventilation sheet to the upper mold constituting the concrete product mold according to the embodiment of the present invention.

FIG. 6 is a cross-sectional view of a mold for explaining a schematic configuration of a mold for manufacturing a concrete product.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Formwork for concrete products 12 Lower formwork 13 Upper formwork 13a Curved surface 15 Horizontal formwork 17 Vent sheet 18 Support plate 19 Locking piece S Concrete casting space

Claims (3)

[Claims] 1. A lower mold provided with a horizontal frame around a bottom plate, and a ventilation sheet for removing air bubbles generated in the upper part of the cast concrete is installed above the lower mold. A concrete product mold for producing a concrete product by casting the concrete into a concrete casting space surrounded by the lower mold frame and the upper mold frame and hardening the concrete. The upper mold frame has a lower surface having a curved surface depressed upward, and the upper mold frame has a long strip-shaped support plate having elasticity and both ends supported by the upper mold frame. Is provided along the curved surface, and the ventilation sheet is sandwiched between the support plate and the curved surface of the upper mold frame and is disposed along the curved surface of the upper mold frame. Formwork for concrete products. 2. The support plate according to claim 1, wherein both ends of the support plate are locked and supported by locking pieces protruding from a curved surface of the upper mold frame. Formwork for concrete products. 3. The concrete product form according to claim 1, wherein a plurality of the support plates are arranged at intervals.