JPH10166339A - 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, 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, a fitting piece part 19 is 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 to 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 is manufactured by molding concrete, as shown in FIG. 6, the concrete product 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 mold for producing a concrete product by casting and hardening the concrete in a concrete casting space surrounded by the lower mold frame and the upper mold frame, wherein On the lower surface side, an elongated holding member having both ends connected to the upper mold frame is attached, and the ventilation sheet is inserted and held in a gap between the holding member and the lower surface of the upper mold frame. It is characterized by having.
The concrete product form according to claim 2 is the concrete product form according to claim 1, wherein the holding member is formed of a band-shaped plate having both ends connected to the upper form. I have. A concrete product form according to a third aspect of the present invention is the concrete product form according to the first aspect, wherein the holding member is formed of a rod having both ends connected to the upper form. The concrete product form according to claim 4 is the concrete product form according to any one of claims 1 to 3, wherein the plurality of holding members are arranged at intervals on a lower surface of the upper form. It is characterized by being established.

[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.

As shown in FIGS. 3 and 4, a plurality of holding members 18 are provided on the lower surface 13a of the upper mold frame 13 so as to extend in the width direction and at intervals in the length direction.
These holding members 18 are made of, for example, band-shaped plate members formed of a synthetic resin such as plastic or a metal such as aluminum, and the holding members 18 are attached with both ends connected to the upper mold frame 13. ing.

The holding member 18 and the upper mold frame 13
In the gap 19 with the lower surface 13a of the concrete
A ventilation sheet 17 for removing air bubbles generated at the upper part of the concrete poured into the concrete is inserted and disposed. That is, the ventilation sheet 17 inserted into the gap 19 between the lower surface 13a of the upper mold frame 13 and the holding member 18 is held by the respective holding members 18 and attached along the lower surface 13a of the upper mold frame 13. .

Then, the upper mold 1 constituting the mold 11 is formed.
When the ventilation sheet 17 is attached to the upper mold frame 13, the ventilation sheet 17 is inserted through the gap 19 between the holding member 18 provided on the lower surface 13 a of the upper mold frame 13 and the lower surface 13 a of the upper mold frame 13 in order from one end side of the upper mold frame 13. Pull both ends to extend. In this way, the ventilation sheet 17 inserted into the gap 19 between the lower surface 13a of the upper mold frame 13 and the holding member 18 allows these holding members 1
8 and is held along the lower surface 13 a of the upper mold frame 13.

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 while pulling both ends of the ventilation sheet 17.
Thereby, the vicinity of both ends of the ventilation sheet 17 held by the holding member 18 is sandwiched by the upper mold frame 13 and the horizontal frame portion 15 constituting the lower mold frame 12, and the ventilation sheet 17 is maintained in a stretched state. . Next, concrete is cast into the concrete casting space S surrounded by the lower mold frame 12 and the upper mold frame 13, and is hardened 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. Further, since the entire ventilation sheet 17 is held on the lower surface 13a of the upper mold frame 13 by the holding member 18, the quality of the concrete product is reliably prevented from being deteriorated due to the loosening of the ventilation sheet 17 during concrete hardening and curing. can do. 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 described above, the ventilation sheet 17 is inserted into the gap 19 between the holding member 18 provided on the lower surface 13a of the upper mold frame 13 and the upper mold frame 13. The ventilation sheet 17 can be arranged on the lower surface 13 a side of the upper mold frame 13 by the holding member 18 only by inserting the ventilation member 17. That is, the work of attaching the ventilation sheet 17 can be performed extremely easily, and the work efficiency can be greatly improved.

The ventilation sheet 17 is separated from the upper mold frame 13 by a holding member 18 at intervals in the longitudinal direction of the upper mold frame 13.
Is held on the lower surface 13a of the ventilation sheet 1
7 can be reliably prevented, and thereby the quality of the concrete product can be reliably prevented from deteriorating due to the looseness of the ventilation sheet 17. That is, a high quality concrete product can be manufactured. When the ventilation sheet 17 is removed from the upper mold 13 after the production of the concrete product, the lower surface 13a of the upper mold 13 and the holding member 18
It is only necessary to remove the ventilation sheet 17 from the gap 19 between the ventilation sheet 17 and the lower surface 13 a of the upper mold frame 13. Removal work can be performed very easily.

The above-mentioned formwork 11 includes a lower formwork 12
Any concrete product may be manufactured as long as it has an upper mold frame 13 that covers the upper part of the concrete product. Further, in the above example, a band-shaped plate is used as the holding member 18, but it is a matter of course that the holding member 18 may be a rod as shown in FIG. Further, the number of the holding members 18 is not limited to the above example.

[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 mold of claim 1, the ventilation sheet is held by the holding member only by inserting the ventilation sheet into the gap between the lower surface of the upper mold and the holding member. It can be arranged on the lower surface side of the mold. 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 securely held on the lower surface of the upper mold frame by the holding member, it is possible to surely prevent the ventilation sheet from being loosened, thereby reducing the quality of the concrete product due to the loosening of the ventilation sheet. Can be reliably prevented. 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, it is only necessary to pull out the ventilation sheet from the gap between the lower surface of the upper mold and the holding member. The work of removing the ventilation sheet can be performed extremely easily as compared with the case where the ventilation sheet is used to attach the lower surface of the upper mold frame.

According to the concrete product form of the second aspect, the ventilation sheet can be securely held by the holding member formed of the band-shaped plate. According to the concrete product form of the third aspect, since the ventilation sheet is held by the holding member formed of a rod, the influence of the holding member on the function of the ventilation sheet can be reduced. According to the concrete product form of claim 4,
The entire ventilation sheet can be held along the lower surface of the upper mold frame by holding the entire ventilation sheet by a plurality of holding members provided at intervals.

[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 an AA 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. 4 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. 5 is a perspective view of the upper mold for explaining another structure of 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 Lower surface 14 Bottom plate 15 Horizontal formwork 17 Ventilation sheet 18 Holding member 19 Clearance S Concrete casting space

Claims (4)

[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. An elongated holding member having both ends connected to the upper mold frame is attached to the lower surface side of the upper mold frame, and the ventilation hole is provided in a gap between the holding member and the lower surface of the upper mold frame. A concrete product form, wherein a sheet is inserted and held. 2. The concrete product formwork according to claim 1, wherein the holding member comprises a band-shaped plate body having both ends connected to the upper formwork. 3. The concrete product formwork according to claim 1, wherein the holding member comprises a rod body having both ends connected to the upper formwork. 4. The concrete product form according to claim 1, wherein a plurality of the holding members are arranged at intervals on a lower surface of the upper form. .