JPH0725581A - Concrete product with lifting hole - Google Patents

Abstract

PURPOSE:To speedily, easily and safely remove a concrete product out of a mold by burying a jig having a roughly rectangular parallelopiped opening and a space for rotation inside it inside. CONSTITUTION:A lifting hole forming member 2 has a roughly rectangular parallelopiped introduction member 4 having openings 3, 3 on its upper part and lower part and a cylindrical storage member 6 communicated through to this introduction member 4 and having a spatial body for rotation inside, and additionally, it is constituted of a pair of hole forming pipe members 8, 8 communicated through to the spatial body 5 for rotation and projected from an outer peripheral surface 7. This lifting hole forming member 2 is arranged inside of a concrete formwork 1 through a support member and others. Mold removing work of a product 14 after concrete is deposited in the state is carried out so that a square bar type insertion member 12 is inserted from the opening 3 of the introduction member 4 by a specified lifting jig 11, it is turned by about ninety degrees after it is inserted into the spatial body 5 for rotation and lifted upward, then, the upper surface of the insertion member 12 is engaged with the upper wall of the cylindrical storage member 6, and the product 14 is smoothly drawn from the formwork 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete product having a large size, a heavy weight and a mountain-shaped cross section.

[0002]

2. Description of the Related Art Conventionally, as a production mold for this type of concrete product, as shown in FIG. 5, a concrete form made of two concrete members is usually used. Then, when the concrete mortar is filled into the concrete formwork described above, and then the mold is removed after solidification, the upper part of the concrete member in the formwork is adsorbed by, for example, a vacuum member, and pulled upward with its adsorption force. It was supposed to be lifted and released from the mold.

However, since the vacuum member as described above is expensive and requires considerable labor and technical force,
It often hindered demolding work of concrete members in factories or construction sites. Moreover, the safety problem of demolding work cannot be ignored.

[0004]

DISCLOSURE OF THE INVENTION The present invention was devised in view of the above-mentioned conventional problems, and a concrete product solidified in a concrete formwork can be easily and quickly prepared by a jig previously embedded in the product. And it can be safely demolded, and the demolded concrete product can be placed from the inside-out state to a predetermined normal state by the embedding jig, and the hoisting hole for hoisting and carrying is also buried at the same time. The purpose is to provide concrete products with

[0005]

In order to achieve the above object, the present invention is configured as follows. That is, according to the present invention, the introduction member 4 having the openings 3 and 3 in the upper and lower portions and having a substantially rectangular parallelepiped space inside, and communicating with the introduction member 4,
A cylindrical housing member 6 having a rotating space body 5 therein, and a rotating space body 5 of the cylindrical housing member 6 are communicated with each other and extend from the outer peripheral surface 7 of the cylindrical housing member 6 in opposite directions. A lifting hole forming member 2 having a pair of hole forming pipe members 8 and 8 is provided, and the lifting hole forming member 2 has the upper opening 3 of the introducing member 4 at substantially both ends of the upper surface of the concrete product. A pair of them are embedded so that they are flush with the upper surface of the.

[0006]

In the present invention, the introduction section 4 and the cylindrical storage section 6 are provided in the concrete formwork 1 for producing the concrete product 14.
And a hole forming member 2 having a pair of hole forming pipes 8 and 8.
Is placed in advance, and concrete is poured and solidified in that state to produce a concrete product 14 with a lifting hole.

Since such a concrete product 14 with lifting holes can be quickly removed from the mold by using a predetermined lifting jig 11 when the mold is removed from the flipped state to a normal state. Can be carried out with the embedding tool embedded in the concrete product 14, and can be easily transported to a predetermined construction site with the embedding tool embedded in the concrete product 14.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. In the figure, reference numeral 1 indicates a concrete formwork, and reference numeral 2 indicates a lifting hole forming member arranged in the concrete formwork 1. This lifting hole forming member 2 is
A substantially rectangular parallelepiped introducing member 4 having openings 3 and 3 in an upper portion and a lower portion, and a rotating space body 5 communicating with the introducing member 4 and internally.
And a pair of hole-forming pipe members that communicate with the rotation space body 5 of the cylindrical storage member 6 and project from the outer peripheral surface 7 of the cylindrical storage member 6 in opposite directions. It is configured to have 8 and 8.

The lifting hole forming member 2 is shown in FIG.
As will be understood from the above, it is arranged inside the concrete formwork 1 via the support member 9 and the like. That is, the pair of hole forming pipe members 8, 8 have the tip opening portions 10, 10, 10,
10 are arranged so as to abut on the inner surface of each of the concrete formwork 1.

When concrete is poured in this state, the lifting hole forming members 2, 2, 2, 2 are embedded and fixed in the concrete product 14 to be produced. In the above, next concrete formwork 1
A method for removing the concrete product 14 solidified in the mold will be described.

The demolding operation of the concrete product 14 is performed by a predetermined lifting jig 11. The hoisting jig 11 is formed by including a square rod-shaped insertion member 12 that can be inserted into the introduction member 4, and a holding member 13 that rotatably supports the insertion member 12 in the horizontal direction.

Here, when the insertion member 12 is inserted from the upper opening 3 of the introduction member 4, and is inserted into the space for rotation 5 and rotated about 90 degrees and lifted up, the upper surface of the insertion member 12 rotates. It will be locked to the upper wall of the cylindrical storage member 6 in the space body 5. Therefore, if it is pulled up in this state, the concrete product 14 can be smoothly pulled up from the concrete formwork 1 as can be understood from FIG.

By the way, the concrete product 14 is not installed at the construction site in an inverted state as shown in FIG. That is, the upper surface 15 of the concrete product 14 shown in FIG. 5 is the bottom surface at the construction site. Therefore, the concrete product 14 thus hung up must be rotated about 180 degrees so as to be turned to the front side.

The method is as follows. First, in the state of turning over as shown in FIG. 5, lower it once on the ground, and from that state, as shown in FIG. 6, the hoisting jig 11 is placed in the hoisting hole 16 provided above the side surface of the concrete product 14. Insert the hoisting rod 17 and set it upright in the vertical direction. Further, from this state, the lifting rod 17 is also inserted into the lifting hole 16 located on the lower side of the side surface, so that as shown in FIG.

Then, the concrete product 14 can be installed in a regular state by transporting and moving it to a predetermined construction site in the suspended state and then lowering it to the ground as it is.

[0016]

The present invention has the above construction. And
According to the concrete product with lifting holes according to the present invention,
A jig pre-embedded in the concrete product allows the concrete product to be quickly and easily demolded and the work can be performed safely.

Further, by the burying jig, the concrete product can be quickly and easily reset to the normal state from the inside-out state immediately after demolding. In addition, it is possible to quickly, easily and safely move and transport to a predetermined construction site by using a predetermined lifting jig.

[Brief description of drawings]

FIG. 1 is an explanatory view of a lifting hole forming member according to the present invention.

FIG. 2 is an explanatory diagram illustrating a usage state of an embodiment of the present invention.

FIG. 3 is a diagram for explaining a lifting state in the present embodiment.

FIG. 4 is an explanatory diagram of a buried state of a lifting hole forming member.

FIG. 5 is an explanatory diagram of a demolded state according to the present embodiment.

FIG. 6 is an explanatory view of a usage state according to the present embodiment.

FIG. 7 is an explanatory diagram of a lifting jig.

FIG. 8 is an explanatory diagram of lifting and moving according to the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete formwork 2 Lifting hole forming member 3 Opening 4 Introduction member 5 Rotating space body 6 Cylindrical storage member 7 Outer peripheral surface of cylindrical storage member 8 Hole forming pipe member 9 Support member 10 Tip opening 11 Lifting jig 12 Insertion Member 13 Holding member 14 Concrete product 15 Top surface of concrete product 16 Lifting hole 17 Lifting rod

Claims (1)

[Claims] 1. An introducing member (4) having openings (3, 3) in the upper and lower portions and having a substantially rectangular parallelepiped space inside, and a space for rotation inside which communicates with the introducing member (4). Body (5)
And a cylindrical storage member (6) having a hollow space, and a space (5) for rotation of the cylindrical storage member (6), which communicate with the outer peripheral surface (7) of the cylindrical storage member (6) in opposite directions. A pair of hole forming pipe members (8,
8) and a hoisting hole forming member (2) having: the hoisting hole forming member (2), the upper opening (3) of the introducing member (4) having the upper opening (3) at substantially the upper end of the concrete product. A concrete product with a lifting hole, characterized by being buried in a pair so as to be flush with the upper surface of the concrete product.