JPS6040763Y2 - Hanging tool for prestressed concrete board with hollow holes - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lifting device used for lifting a prestressed concrete plate with hollow holes in which a PC steel wire is inserted and tensioned to form several hollow holes.

This type of prestressed concrete board (hereinafter referred to as PC board) has PC steel wires inserted inside it to strengthen its tensile and bending strength, and the hollow holes provide excellent heat insulation, sound insulation, fire resistance, etc. Because of this, it is used as a construction material and construction product for making floors, walls, etc.

Conventionally, this PC board was lifted by running a wire hook horizontally and lifting this wire with a crane, etc., but in this case, the edges of the PC board were particularly damaged due to being scraped by the wire. There was a drawback.

In order to prevent this drawback, the edges were reinforced by inserting synthetic rubber or jute bags, etc., as necessary, but recently, P.
A type of c-board laminated with a soft material such as a heat insulating material was developed, and even with such a board, the above-mentioned drawbacks could not be solved even if corner pads were applied, and it was not possible to suspend the board using this wire.

In view of the above, the present invention was devised to provide a PC board that does not have any damage to its edges and can be reliably lifted even if it is laminated with a soft material such as a heat insulating material.

Hereinafter, the present invention will be explained in detail based on the illustrated embodiment. Reference numeral 1 denotes an upper support fitting that supports the upper end of the PC board A, the upper end is provided with a collar part 2, and the body part 3 is a hollow part of the PC board A. The wire is shaped so that it can be inserted into the hole B, and a hollow portion 4 is bored inside the wire C to allow the wire C to pass therethrough.

Reference numeral 5 denotes a lower support metal fitting, which is shaped so that it can be inserted into the hollow hole B of the PC board A. A through hole 6 with a female thread is provided on the side surface of the lower support metal fitting, and a pin is inserted into this through hole 6 as described later. 10 are screwed together to support the lower surface of the PC board A.

Also, the wire ○ is attached to the lower support fitting 5, and in this embodiment, a vertical groove and a hole following this are provided in the upper part of the lower support fitting 5.
A wire-shaped guide 7 is formed, a wire 〇 is passed through the guide 7, and the wire C is connected to the ring shape. This is done by fitting and pressing the side surface of the wire C, but when forming the lower support fitting 5, the end of the wire 0 may be crimped and attached, or it may be attached using conventional known means. Of course, this is a good thing.

Reference numeral 10 denotes a pin, and a male threaded portion 11 is formed in the center thereof to be screwed into the female thread provided on the lower support fitting 5. When the two ends 12 and 12 touch the bottom surface of the PC board,
It is configured to support this.

The present invention is based on a combination of two sets of hanging devices configured as described above, and how to use the device will be explained below.

First, the wire C attached to the lower support metal fitting 5 is inserted into the hollow part 4 of the upper support metal fitting 1, and the lower support metal fitting 5 is passed through the hollow hole B of the PC board A.

Then, the pin 10 is screwed into the through hole 6 provided with a female thread in the lower support metal fitting 5, and the PCC is connected at both ends 12 and 12.
In addition to supporting the lower surface of the plate, the body 3 of the upper support metal fitting 1
is inserted into the upper surface of the hollow hole B, and the upper surface of the PCC plate is supported by the collar portion 2.

In this way, the upper and lower surfaces of the PCC plate are supported.
This is done in advance in two of the hollow holes B in the C plate, and the exposed portions of the wires C are simultaneously pulled by a crane or the like to lift the PCC plate.

Note that it is preferable to set the hollow holes B used at this time so that they are symmetrical with respect to the center in order to maintain a balance between the left and right sides.

When this lifting is completed, the pin 10 is unscrewed from the lower support fitting 5, removed, and the PC board A
The support on the lower surface of the PCC is released, and the lower support fitting 5 is pulled out through the hollow hole B in the PCC plate.

Since the present invention has the above-described structure, the wires do not come into direct contact with the periphery of the PC board, and there is no possibility that the edges of the PC board will be scratched or damaged.

Therefore, even a material laminated with soft materials such as heat insulating material can be reliably lifted while supporting at least two or more points of the hollow hole.

In addition, since the PCC board hollow hole B is used, not only can the conventional one be used as is, but also this hollow hole B and the wire 〇 do not come into direct contact with each other.
This hollow hole B will not be damaged.

Furthermore, it has various advantages such as a simple structure, easy handling, and no skill required.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention;
2 is an enlarged perspective view of the upper support fitting, FIG. 3 is an enlarged perspective view of the lower support fitting, and FIG. 4 is an enlarged perspective view of the pin.

Claims (1)

[Scope of utility model registration request] A hollow upper support metal fitting with a flange at the upper end, a lower support metal fitting with a through hole with a female thread carved on the side and a wire attached, and a male threaded part that can be freely engaged with the female thread. The bodies of the upper support fittings are inserted into the two hollow holes of the prestressed concrete plate, and the lower support fittings are inserted into the hollow holes and the hollow parts of the upper support fittings. The prestressed concrete plate is lifted by passing the attached wires through each, supporting each end of the hollow hole by screwing the pins into the lower support metal fittings, and simultaneously pulling the exposed portions of the wires upward. A hanging tool for prestressed concrete plates with hollow holes.