JPH10166334A - 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 14 and a top form 13 provided, through a gas-permeable sheet 17 for removing a bubble generated above a formed concrete, on the upper part of the bottom form 12. In addition, a sheet securing groove 16 is formed at spots which come into contact with the lateral form part 15 constituting the bottom form 12 on the lower face 13a side of the top form 13. Further, the gas-permeable sheet 17 is stretched on the periphery of the concrete shuttering 11, and then is arranged along the lower face 13a of the top form 13 in such a state that a tension is applied, by insetting an elastic sheet securing member 18 into the sheet securing grooves 16 through the gas-permeable sheet 17 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 is manufactured by molding concrete, as shown in FIG. 3, the concrete mold is enclosed by a lower mold 1 and an upper mold 2 installed above the lower mold 1. Concrete was poured into the concrete placement space S, and the concrete was removed after curing and curing. By the way, when manufacturing the above-mentioned concrete secondary product, a ventilation sheet made of cloth, non-woven fabric, or the like is installed on the lower surface of the upper mold frame 2 for the purpose of removing air bubbles generated in the upper part of the poured concrete. Was.

[0003]

By the way, the ventilation sheet is sandwiched and held between the upper mold frame 2 and the upper end of the horizontal mold frame portion 3 constituting the side wall of the lower mold frame 1. Simply sandwiching in this manner causes the entire ventilation sheet to be loosened. For this reason, for example, it is also performed to adhere with an adhesive or a double-sided adhesive sheet,
In this case, there is a problem that a great deal of labor is required for attaching the ventilation sheet, and also a great deal of labor is required for removing the ventilation sheet from the upper mold frame 2 after manufacturing. The ventilation sheet was partially peeled off and loosened, and again the quality of the product could be affected.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is very easily provided with a ventilation sheet on the lower surface side of an upper mold frame for a concrete product capable of producing a high quality concrete product. The purpose is to provide formwork.

[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 formwork for producing a concrete product by casting and hardening the concrete in a concrete casting space surrounded by the lower formwork and the upper formwork, wherein the upper formwork A sheet stopper groove is formed on the lower surface side at least near a pair of side portions opposed to each other, and the sheet stopper groove has elasticity through a ventilation sheet arranged along the lower surface of the upper mold frame. A seat stopper member is fitted, and the ventilation sheet is stretched along the lower surface of the lower mold frame in a state where the breathable sheet is pulled and tensioned by the sheet stopper member. In the concrete product form according to a second aspect, in the concrete product form according to the first aspect, the sheet retaining groove is formed at a contact position with a horizontal form portion forming the lower mold form. It is characterized by:

[0006]

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. This formwork 11
Has a lower mold frame 12 and an upper mold frame 13 attached to an upper portion of the lower mold frame 12. The lower mold frame 12 includes a bottom plate portion 14 and a horizontal frame portion 1 erected around the bottom plate portion 14.
5, the lower mold frame 12 and the upper mold frame 13
The concrete is poured into the concrete placing space S surrounded by.

The upper mold frame 13 has a sheet retaining groove 16 formed on the lower surface 13a near the side thereof. An elastic sheet stopper member 18 having a substantially circular cross section is fitted into the sheet stopper groove 16 via a ventilation sheet 17 for removing air bubbles generated above the concrete placed in the concrete placing space S. It has become. That is, the sheet stopping member 18 is provided via the ventilation sheet 17.
Is inserted into the sheet retaining groove 16 so that the upper mold 13
The ventilation sheet 17 can be attached along the lower surface 13a of the airbag.

When the upper mold frame 13 is set on the upper portion of the lower mold frame 12, the sheet stopper groove 16 formed on the upper mold frame 13 forms an upper portion of the horizontal mold frame portion 15 constituting the lower mold frame 12. It is formed at the position where it is located. When attaching the ventilation sheet 17 to the upper mold frame 13 constituting the mold 11, first, the ventilation sheet 17 is provided along the lower surface 13 a of the upper mold frame 13, and in this state, Vent sheet 1
The sheet stop member 18 is pushed into the sheet stop groove 16 through 7 and fitted.

In this manner, the sheet stopper 1
8 into the sheet stopper groove 16, the ventilation sheet 17 is pulled in the direction of the sheet stopper groove 16, whereby the ventilation sheet 17 is stretched under tension on the lower surface 13 a side of the upper mold frame 13. Will be retained.

Then, the upper mold frame 13 to which the ventilation sheet 17 is attached in this manner is mounted on the upper portion of the lower mold frame 12 and attached. In this way, the sheet stopper groove 16 in which the sheet stopper 18 of the upper mold 13 is fitted is arranged on the horizontal frame 15 of the lower mold 12. As a result, the sheet stopper member 18 fitted into the sheet stopper groove 16 of the upper mold frame 13 further firmly secures the sheet stopper groove 16.
, And is kept fitted without falling off from the sheet stopper groove 16.

Then, concrete is cast into the concrete casting space S surrounded by the lower mold frame 12 and the upper mold frame 13, and is cured and cured to form a concrete product. At this time, air bubbles generated in the upper part of the poured concrete are reliably removed by the ventilation sheet 17. The lower surface 13a of the upper mold frame 13 is stretched by the sheet stopper member 18 fitted in the sheet stopper groove 16 and tension is applied to the periphery thereof.
Therefore, 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 the hardening and curing of the concrete. When the concrete product is formed as described above, the upper mold 1
3 is removed, and the concrete product is removed from the lower mold frame 12 and taken out.

As described above, according to the above-described concrete product form 11, the upper form 13 is provided with the ventilation sheet 17 along the lower surface 13 a of the upper form 13. Just by fitting the sheet stopper member 18 into the sheet stopper groove 16 formed near the end on the lower surface 13a side,
Very easily, the ventilation sheet 17 can be provided on the lower surface 13a side 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, when the sheet stopper member 18 is fitted into the sheet stopper groove 16, the ventilation sheet 17 is tensioned by being pulled around by the sheet stopper member 18. The ventilation sheet 17 disposed on the lower surface 13a side can surely be prevented from being loosened, whereby the deterioration of the quality of the concrete product due to the loosening of the ventilation sheet 17 can be reliably prevented. That is, a high quality concrete product can be manufactured.

Further, the upper mold frame 1 provided with the ventilation sheet 17 is provided.
3 is set on the lower mold frame 12, the sheet stopper groove 16 is disposed at a position where the sheet stopper groove 16 comes into contact with the upper portion of the horizontal mold frame portion 15 constituting the lower mold frame 12, so that the sheet stopper member 18 is positioned in the sheet stopper groove. As a result, the sheet stop member 18 is securely prevented from dropping out of the sheet stop groove 16. Also, when the ventilation sheet 17 is removed from the upper mold frame 13 after the production of the concrete product, it is only necessary to remove the sheet stopper member 18 fitted into the sheet stopper groove 16, so that, for example, an adhesive or a double-sided adhesive sheet is used. The work of removing the ventilation sheet 17 can be performed extremely easily as compared with the case where the ventilation sheet 17 is used to attach the ventilation sheet 17 to the lower surface 13a of the upper mold frame 13.

As the sheet stopping member 18 to which the ventilation sheet 17 is attached, for example, vinyl or rubber having water resistance and oil resistance can be used. The heat resistant temperature of the sheet stopper 18 is about 50 to 1
Preferably it is 00 ° C. Further, the form 11
Any concrete product may be manufactured as long as it has an upper mold frame 13 that covers the upper portion of the lower mold frame 12. Further, the cross-sectional shape of the sheet stopper 18 is not limited to a circle. The sheet stopper groove 16 has a lower surface 13 around the entire periphery of the upper mold frame 13.
a, and in this case, the ventilation sheet 17 is stretched along the lower surface 13a of the upper mold frame 13 by being pulled all around.

[0016]

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 the present invention, the sheet stopper formed near the end on the lower side of the upper form in a state where the ventilation sheet is arranged along the lower side of the upper form. By simply fitting the sheet stopper member into the groove, the ventilation sheet can be disposed on the lower surface side of the upper mold frame very easily. That is, the work of attaching the ventilation sheet can be performed extremely easily, and the working efficiency can be greatly improved. Also, the ventilation sheet is disposed in a state where the sheet stopper is pulled and tensioned by the sheet stopper when the sheet stopper is fitted into the sheet stopper groove. It is possible to reliably prevent the provided ventilation sheet from being loosened, thereby reliably preventing the quality of the concrete product from deteriorating due to the loosening of the ventilation sheet. That is, a high quality concrete product can be manufactured. Also, after manufacturing the concrete product, when removing the ventilation sheet from the upper mold,
Since it is only necessary to remove the sheet stopper member fitted in the sheet stopper groove, for example, the work of removing the ventilation sheet compared to the case of attaching the ventilation sheet to the lower surface of the upper mold frame using an adhesive or a double-sided adhesive sheet Can be performed very easily. According to the concrete product form of the present invention, when the upper form provided with the ventilation sheet is installed on the lower form, the sheet retaining groove is in contact with the horizontal form forming the lower form. Since the sheet stopper is disposed at the contact point, the sheet stopper is more firmly pushed into the sheet stopper groove, and the sheet stopper is reliably prevented from falling off the sheet stopper groove.

[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 cross-sectional view of a mold for explaining a schematic configuration of a mold for manufacturing a concrete product.

[Description of Signs] 11 Concrete product formwork 12 Lower formwork 13 Upper formwork 13a Lower surface 14 Bottom plate 15 Horizontal formwork 16 Sheet retaining groove 17 Vent sheet 18 Sheet retaining member S Concrete placing space

Claims (2)

[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. A sheet stopper groove is formed on the lower surface in the vicinity of at least a pair of side portions facing each other in the upper mold, and the sheet stopper is disposed along the lower surface of the upper mold. An elastic sheet stopper is fitted via the vented sheet, and the vent sheet is stretched along the lower surface of the lower mold frame in a state where the sheet stopper is pulled and tensioned by the sheet stopper. Features Concrete products for formwork. 2. The concrete product formwork according to claim 1, wherein the sheet stopper groove is formed at a position where the sheet stop groove comes into contact with a horizontal formwork portion constituting the lower formwork.