JPS5949912A - Precast concrete slab with rib and its manufacturing device - 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 ribbed precast concrete slab for IM construction and an apparatus for manufacturing the same.

Traditional ribbed precast concrete slabs include
There are two types: a rib bearing type and a flange bearing type.The former not only requires a larger floor height, but also requires formwork to close the gaps between the ribs on the beam with concrete IJ-type. That's better. However, in the conventional flange bearing type, the thickness of the flange is increased at the bearing part due to the shearing force of the bearing part, and therefore manufacturing by a long line method is impossible.

In the present invention, if the span length is appropriately selected (approximately 5 to 6 m),
This study focused on the disadvantages and strength that would arise even if supported with flanges that do not increase the thickness, and developed a precast concrete slab with a lip that can be manufactured using a long line method even though it is a flange bearing type. The purpose is to provide equipment for manufacturing products using the long line method.

The characteristic feature of the precast concrete slab with lips of "Honhachi Lido" is that an appropriate number of lips extending in the length direction are placed below the flange, which has a uniform thickness throughout, except for the longitudinal ends. Preferably, a welded wire mesh is buried in the flange of the protruding point, and a PC bar material is buried in the lip.

In addition, the feature of the manufacturing apparatus of the present invention is that side plates are erected on both sides of the bottom plate which has a flat part and an appropriate number of four parts for lip formation extending in the length direction. A fixed plate frame of a length, a partition plate for dividing the space above the flat part of the fixed plate frame at fixed distances, and a partition that is fitted into a lip forming recess marked with 01 at the location where the partition plate is installed. The partition plate is provided with a flock, and the partition plate is cut with a groove for dropping the welded wire mesh, and the partition block l'j', li'l is made so that the curved surfaces are oriented in the longitudinal direction KfTbj't. Along with giving examples,
Discount! [Simply put, it is preferable to form a recess for inserting the PCψfi, and a groove for the old cutting at the center in the length direction.

Hereinafter, the present invention will be specifically explained based on the drawings.

First, with reference to FIGS. 1 and 2, an example of a precast concrete slab with a lip (hereinafter simply referred to as slab) of the present invention will be explained with reference to FIGS. To be clear, the thickness of the flange 1 is uniform throughout, and a welded wire mesh 2 is buried inside the flange 1, which is constructed by welding vertical bars and dead bars in a lattice shape and welding the intersections. There is.

A lip 3 extending in the length direction is provided below the flange l, except for both ends in the length direction.
The number of is limited to five as shown in the figure.

PC#1 material 4 is buried inside the lip 3, and prestress is applied to the slab.

The slab of the present invention is supported by beams at both ends of the flange l, and when the slab of the present invention is used to construct the floor of a building, not only can the floor height be kept low, but also the floor height can be kept low. The erection work is simple and can shorten the construction period of the building.

The slab of the present invention has the feature that, due to its structure, it can be manufactured in large numbers at once by a long-line method, which will be described later.

Next, FIGS. 3 and 4 show an example of the manufacturing apparatus of the present invention.
, 7 are fixed to form a fixed plate frame t14, and it is advantageous to make it as long as possible.

The bottom plate 6 has a flat part 8 and a lip forming recess 9, and is usually made of a bent lead plate. In the illustrated case, an angle material is used for the side plate 7, but the dimensions of the angle material used are determined according to the flange thickness of the slab to be manufactured.

1O is a partition plate, and in the case shown in the figure, an angle material is also used for this, and grooves 12 are cut into the vertical strips 11 of the welded wire mesh 2 at regular intervals in the standing soil piece. There is.

The partition plate IO forms the end face of the 7 flanges of the slab, and has a flat part 8 at each distance corresponding to the length of the flange of the slab.
It is installed on the top, crossing between the side plates 7, 7. and,
There is a slight gap between the 11 partitions for the middle partition plate.

13 is the four lip forming parts 9 at the installation location of the partition plate lO.
The partition block is fitted into the partition block and has a length such that the end face of the formed lip is retracted by a predetermined distance from the full face of the flange.

In the case shown in the figure, the dividing surface of the block 9J block 131 is sloped in the length direction and divided into two by the shape, and the lip forming recess 9
Ill? ': Conveniently arranged for placing the PC inner material 4. Four parts 14 for inserting PCψi (@4) are formed on each joint surface of the divided pieces, and the divided pieces are inserted into the recesses 14 with a distance of 1.
@'4 If the material 4 is arranged and then the divided pieces are brought close to each other and combined, P(41t14 penetrates the partition block 13
It is placed in a state of 7. [, T, in this state, divider frame 7
The position of the partition block 13 is fixed by tightening the partition block 13.

), IPC
(A cutting groove 15 is provided, and after the concrete hardens, the tensed PC material 4 is cut in this area.)

The above-described manufacturing apparatus of the present invention is highly efficient because the slabs of the present invention can be manufactured at one time in multiple motions.

[Brief explanation of drawings]

1- is a vertical sectional view showing an example of the slab of the present invention, FIG. 2 is a sectional view taken along the line X-X of FIG. 1, and FIG. 3 is a perspective view (2) of the manufacturing apparatus of the present invention (not shown) , FIG. 4 is a longitudinal sectional view of the partition portion on the same side. 1... flange, 2... welded wire mesh, 3... rib,
4...1) CtlB4tt, 5... Fixed plate frame, lO
...Partition plate, 13 ...Partition block, ...Patent applicant Fudo Kenken Co., Ltd.

Claims (1)

[Claims] 1) Below the flange of uniform thickness throughout, except for the ends in the length direction, there is a thickness of f 3f'1. A precast concrete slab made of ribs with a number of chambers installed 2) Welded wire mesh is buried in the flange and PC fence is buried in the ribs! , a ribbed precast concrete slab according to claim 1). 3) Both sides i. ? / □ A long fixed frame made by installing side plates upright, a partition plate to partition a space of 10 from the flat part of the fixed plate frame into a fixed distance gff 4rr, and a partition plate. A precast I/concrete l/buoy with τ1 is provided with a partition block that is fitted into the four rib forming parts at the Mir;
Slab manufacturing trial compensation. 4) A groove for welding wire to fall is carved into the partition plate, and the partition flock is divided into two parts so that the split surface is inclined by 1A in the length direction.
At the same time, four parts for inserting the PC floor material are formed on the split surface, and a PC floor cutting part is formed in the center in the longitudinal direction. .