JPS5927049A - Precast concrete panel for synthetic floor and production thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a precast concrete slab for a synthetic floor, which is used to construct a composite floor by forming a composite structure with a cast-in-place concrete layer, and a method for using the same.

Concrete using conventional precast concrete slab
1. For the floor, we use a precast concrete slab with many reinforcing bars protruding from the top in a chevron shape, and use this as a template to pour cast-in-place concrete on top of it, or we lay a precast concrete slab. However, in some cases, cast-in-place concrete is placed on the top surface for finishing, but in the former case, the precast concrete slab itself does not carry much load;
Most of the role is simply to serve as a formwork, and it is difficult to automate the production of precast concrete plates, which inevitably leads to high costs.

In addition, in the latter case, it is not possible to integrate the precast concrete slab and the cast-in-place concrete layer, so the design must be such that the load is supported only by the precast concrete slab, which increases the thickness of the floor. There were problems such as inconvenience in construction and uneconomical cost.

In view of the above-mentioned problems, the present invention is a precast for synthetic floor that can be mechanically integrated well with the cast-in-place concrete layer, can construct a thin and strong composite floor, and can be manufactured at a significantly low manufacturing cost. The purpose is to provide a concrete slab and its manufacturing method, and its gist is to provide a precast concrete slab for synthetic floors, which has a number of shallow concavities drilled at regular intervals on its surface, and automatic concrete pouring. In a method for producing a precast concrete slab in which plate-shaped concrete slabs are continuously formed using a construction machine, a plurality of stamping molds are radially projected around the outer periphery of the concrete that has been placed and leveled by the automatic concrete placing machine. The present invention relates to a method for producing a precast concrete slab for a synthetic floor, which forms a large number of shallow recesses on the surface by rolling a molded roller provided thereon.

Next, an example of implementation of the present invention will be described with reference to the drawings.

A in the figure is a precast concrete slab according to the present invention. This precast concrete version A has a plurality of hollow holes 1°1...pa opened in the longitudinal direction within its wall thickness, and a large number of PC steel wires 2, 2... ...is buried under tension.

On the other hand, a large number of shallow recesses 3, 3, . . . are formed on the upper surface. As an example, the concave portion 3 has a circular planar shape with a diameter of about 30IIllIl, and a depth of about 51mm.
It is formed to a certain degree.

In addition to the circular shape mentioned above, the shape of this recessed part 3 is triangular,
It may have a square or other polygonal shape, and its size may be changed to large or small, and it may also be formed into an elongated groove-like recess 3a as shown in FIG.

Next, the production of the above-mentioned precast concrete version A will be explained.

First, a large number of PC copper 1 are placed on the bottom mold plate 11 using the floor surface etc.
2.2... is stretched between the end support frames 12.12 with both ends fixed, and tension is applied in advance.
A side formwork 13.13 is placed on both sides of the PC steel wires 2, 2, . . . , and a plurality of cores 14.14. The old... are arranged parallel to each other in the direction in which the PCM wire 2 is stretched.

The cores 14, 14, . . . are supported with their rear ends protruding in a cantilevered manner.

These both side formworks 13 and each core 14 are the bottom formwork 11
The upper surface is supported by an automatic concrete placing machine 15 that moves along the PCC diagram 2, and this automatic concrete placing machine 15 has a first and a second concrete placing machine that places concrete in two stages. Hopper 168, 16
b is provided, and its lower end is opened between both side formworks 13.13, so that concrete poured down by a tamping device (not shown) is tamped between both side formworks 13.13.

A surface leveling plate 17 for leveling the upper surface of the concrete 1 after pouring is pulled by a chain 18 on the rear side of the automatic concrete 1 to pouring machine 15. A weight 19 is placed on top.

A molding roller 20 is arranged further behind the surface leveling plate 17. This molded roller 20 is supported in a vertically movable manner by a support frame 21 protruding from the rear of the automatic concrete placing machine 15, and is brought into rolling contact with the surface of the concrete after pouring, and has a large number of pressure points on the outer peripheral surface. Type 22.2
2... are provided in a radial manner. By pressing or rolling this onto the concrete surface, a large number of shallow recesses 3, 3, . . . are formed on the concrete surface.

Then, while moving the automatic concrete placing machine 15 sequentially, concrete was poured from inside the hopper 168.16b between the formworks 13.13 on both sides, and the cores 14.14...
Hollow holes 1, 1, . . . are formed by burying the holes in the concrete and pulling them out one after another.

After that, the surface of the concrete is leveled with the surface leveling plate 17, and then the molding roller 20 is brought into contact with the surface and the depressions 3.3 are formed by the pressing molds 22.22...
. . . are formed sequentially.

It should be noted that the surface leveling plates of the patterning roller 20 are different in shape and size depending on the shape of the recesses 3, 3, . . . to be formed.

Further, in the above embodiment, the forming roller 20 is supported by an automatic concrete placing machine, but it is also possible to separately rotate only the forming roller 20 depending on the degree of dryness of the concrete. .

After the surface is molded in this manner, it is allowed to stand and harden until it reaches a strength greater than that of a chamber, after which it is cut to a required length to form a precast concrete slab.

When using the precast concrete slabs constructed in this way, as shown in Fig. 5, a large number of precast concrete slabs A, A, etc. are horizontally supported on the steel beam 23, and reinforcing bars are placed on the upper surface of the slabs. 24, and cast-in-place concrete 25 is placed. At this time, cast-in-place concrete 25 is tightly fitted into the four concavities on the surface of precast concrete slab A, and the two are integrated to form a floor slab with a dynamically composite structure. 26 in the figure is a stud bolt protruding from a steel beam 23.

In addition, in the above-mentioned embodiment, there is a hollow hole in the longitudinal direction, and P
([Although the wire is shown buried under tension, the present invention
Hollow holes are not necessarily required, and ordinary concrete 1-plates without PC steel wires may be used.

The precast concrete slab of the present invention and its manufacturing method are constructed as described above, and by forming a large number of recesses on the surface, when the cast-in-place concrete is polymerized to form a composite floor, the two are strongly mechanically integrated. This resulted in the formation of a strong and tough floor slab, and since it was manufactured by continuous molding, it was easier to manufacture than the conventional method with protruding reinforcing bars. This greatly simplifies the process and makes it easier to stack and handle.

[Brief explanation of the drawing]

The drawings are partial perspective views showing examples of precast 1 to concrete slabs of the present invention, FIG. 2 is a partial perspective view of another example, and FIG.
The figure is a vertical side view explaining the manufacturing method of the precast concrete slab of the present invention, Figure 4 is a simplified sectional view taken along line I-1 in Figure 3, and Figure 5 is the usage state of the precast concrete slab of the present invention. FIG. A... Precast concrete version, 1...
... hollow hole, 2 ... pcWI wire, 3
・・・・・・Concave portion, 11：Bottom mold plate, 13：Side formwork, 14：core, 17：surface uniformity Pressing plate, 20... Roller with mold, 22... Pressing mold. Procedure Amendment 8' (Method) December 8, 1980 Special i+ Agency Director Kazuo Wakasugi 1, Notification of the case Patent Application No. 136 EAO 1982, Name of the invention 1 Precast concrete for synthetic flooring Plate and its manufacturing method 6, IW person with the Nagisa case making amendments Patent applicant: 6-1-2 Iwaki-cho, Iyata-ku, Tsukazuto Spunkrete Manufacturing Co., Ltd. Representative: Yoshihiro Murayama 4, Kozuki 11 Person 〒105 Resident [(Toramon, Minato-ku] 1-11 Kon-7 @ November 30, 1982 (Shipping date) 6. Brief description of the drawings in the specification subject to amendment Z column Contents of the amendment ( 11 In the 8th negative line 17 of the specification of the present application, the phrase “The drawings are of the present invention” has been amended to “Fig. 1 is of the present invention.” [2] =23

Claims (2)

[Claims] (1) A brake rest concrete slab for synthetic floors that has a large number of shallow depressions at regular intervals on its surface. (2) In a method for manufacturing a precast concrete slab in which plate-shaped concrete slabs are continuously formed using an automatic concrete placing machine, a plurality of concrete slabs are placed on the outer periphery of the concrete poured and leveled by the automatic concrete placing machine. A method for manufacturing precast concrete slabs for synthetic floors, in which a number of shallow depressions are formed on the surface by rolling a molding roller with radially protruding molds.