JP7124487B2 - Anti-scattering device and lift-up construction method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a scattering prevention device and a lift-up construction method using the scattering prevention device.

Conventionally, when constructing a building with a large space without pillars inside, as a method of lifting a part of the building such as a roof constructed at a high place, for example, a lift-up as disclosed in Patent Document 1 has been used. method is widely used.

In the lift-up construction method of Patent Document 1, while the tank sidewall is constructed first, the tank roof is constructed at the tank bottom inside the tank sidewall, and the jack with the PC cable attached is supported on the tank sidewall. to install. After that, the tank roof constructed from the bottom of the tank is connected to the lower end of the PC cable and lifted to a predetermined height via the PC cable and jack.

This kind of construction method is not only safe because it is possible to assemble a part of the building constructed at a high place such as a roof, but it is not necessary to install scaffolding, etc., so it is possible to significantly reduce the cost and shorten the construction period. It is a rational method that can be shortened.

JP-A-11-6325

However, for example, when constructing a roof, which is a part of a building, inside the outer frame of a building to be constructed, after the roof frame is assembled, the roof frame is suspended and placed at a predetermined height. In some cases, the work space is formed under the roof frame by stopping the machine, and the work space is used to install equipment on the roof frame and finish the ceiling to construct the roof.

In such a case, the roof frame will be suspended at a predetermined height for several weeks to several months. Since the area in between is in an environment where it is constantly exposed to wind and rain, corrosion is likely to occur even if countermeasures such as applying a rust preventive agent are taken.

When hanging materials are corroded, rust juice and rust powder are scattered by wind and rain, adhering to buildings under construction and causing rust-colored stains. There is a risk of adversely affecting the surrounding environment, such as staining things.

The present invention has been made in view of this problem, and its main purpose is to reduce rust generated on the hanging material, and to prevent water droplets such as rust juice adhering to the hanging material even when rust occurs. To provide a scattering prevention device capable of preventing scattering of powder such as rust powder, and a lift-up construction method using the scattering prevention device.

In order to achieve such an object, the anti-scattering device of the present invention prevents splashing of water droplets and powder adhering to the lifting material for lifting a part of the building in the lift-up construction method in which a part of the building to be constructed is lifted after ground assembly. An anti-scattering device for preventing scattering, comprising: a tubular expandable tube that covers the hanging member; and an expansion device that expands and contracts the expandable pipe along the hanging member . They are arranged in pairs on both sides of the telescopic tube in the diametrical direction .

According to the scattering prevention device described above, by covering the hanging member with the tubular expandable tube, the hanging member can be protected from the environment where it is exposed to wind and rain. As a result, it is possible to reduce the amount of rust generated when the suspension member is used for a long period of time where rust occurs even if the antirust agent is applied. In addition, even if rust occurs on the hanging member, the expansion pipe can prevent splashing of water droplets such as rust juice and powder such as rust powder adhering to the hanging member, so that there is no adverse effect on the surrounding environment.

Further, the lift-up construction method of the present invention is a lift-up construction method using a scattering prevention device for lifting a part of a building to be constructed after ground assembly, wherein the scattering prevention device is a lifting material for lifting an object to be lifted. and a telescopic device for extending and contracting the telescopic pipe along the suspension member, and suspending a part of the building by the suspension member through which the telescopic pipe penetrates. During the suspension period of the lifting operation, the expansion pipe is extended via the expansion device to cover the exposed portion of the hanging member, and at the start of the lifting operation, the expansion pipe is contracted via the expansion device. and exposing the hanging member.

According to the above lift-up method, it is possible to lift a part of the building while visually confirming the condition of the hanging materials. can protect the hanging material from the weathering environment. Therefore, it is possible to reduce the amount of rust generated while ensuring safety. It is possible to maintain high quality of the building to be constructed.

According to the present invention, it is possible to protect the hanging member from wind and rain with a simple structure in which the hanging member is covered with an expansion tube having a cylindrical portion made of a material that prevents the diffusion of water droplets, so that the amount of rust generated can be reduced. Even when rust occurs on the material, it is possible to prevent splashing of water droplets such as rust juice and powder such as rust powder adhering to the hanging material.

It is a figure which shows the detail of the expansion-contraction pipe in embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the outline of the anti-scattering device in embodiment of this invention. It is a figure which shows the installation method of the anti-scattering device in embodiment of this invention (part 1). It is a figure which shows the mounting method of the anti-scattering device in embodiment of this invention (part 2). It is a figure which shows the mounting method of the anti-scattering device in embodiment of this invention (3). It is a figure which shows the lift-up construction method using the anti-scattering apparatus in embodiment of this invention (the 1). It is a figure which shows the lift-up construction method using the anti-scattering apparatus in embodiment of this invention (part 2).

Below, the details of the anti-scattering device and the lift-up construction method using the anti-scattering device will be described. Prior to this, the equipment used when adopting the lift-up construction method will be described. In this embodiment, in order to construct a building having a large space by the lift-up construction method, the roof 12, which is a part of the building, is used as an object to be lifted. An example is the case of lifting to a height position.

As shown in FIGS. 7(a) and 7(b), as a facility for carrying out the lift-up method in order to lift the roof 12 from the outer frame 11 constituting the building 10 having a large space, the previously constructed outer frame 11, a center hole jack 14 installed on the jack stand 13, and a hanger 15 attached to the center hole jack 14 and connected to the roof 12. - 特許庁

<Anti-scattering device>
The anti-scattering device 1 is provided in equipment used when adopting such a lift-up construction method, and includes a telescopic pipe 2 that covers the hanging member 15, and the telescopic pipe 2 that extends and stretches along the hanging member 15. and an expansion device 5 for contraction.

In this embodiment, a bundle of a plurality of PC steel wires is used as the suspension member 15, but the suspension member 15 may be made of any material such as PC steel bar or wire. , the anti-scattering device 1 can be employed.

As shown in FIG. 1, the expansion pipe 2 includes a cylindrical portion 3 and a core member 4 installed in the cylindrical portion 3. The cylindrical portion 3 has a cross section larger than that of the hanging member 15, and water droplets such as rust juice are collected. Any material such as a sheet material, a net material, or a metal foil may be used as long as it is made of a material capable of preventing the diffusion of powder such as rust powder to the surroundings without allowing it to pass through. In this embodiment, a PVC tarpaulin known as a waterproof sheet having weather resistance is adopted. PVC tarpaulin is a sheet material widely used in the construction field, etc., which is made by coating the front and back surfaces of a base fabric made of polyester fiber with a coating resin containing polyvinyl chloride (PVC).

Any material and shape can be adopted for the core material 4 as long as the material is capable of retaining the cross-sectional shape of the cylindrical portion 3 and inhibits the expansion and contraction of the extensible tube 2 in the longitudinal direction. Alternatively, in the present embodiment, a retractable coil formed by processing a wire into a helical shape is employed.

As shown in FIG. 6(a), the telescopic pipe 2 having such a structure covers at least the hanger 15 exposed between the roof 12 and the jack base 13, which are located on the ground surface, in an extended state. It has a length that allows At this time, one telescopic pipe 2 may be made long to ensure a length that can cover the exposed hanging member 15, or a plurality of telescopic pipes 2 may be connected to obtain the required length. may be configured to ensure.

As shown in FIG. 2, the telescopic tube 2 has an insertion opening 21 formed at its upper end and a receiving opening 22 formed at its lower end. An annular metal fitting 23 to which the binding jig 6 can be attached is installed. Therefore, when connecting a plurality of expandable tubes 2, the insertion opening 21 positioned at the upper end of the expandable tube 2 positioned below is inserted into the receiving opening 22 positioned at the lower end of the expandable tube 2 positioned above. .

After that, the tightening jig 6 is attached to both the receiving port 22 and the annular fitting 23 installed near the insertion port 21 . As a result, the vertically positioned expandable pipes 2 are securely connected, and since the receiving port 22 is arranged downward, it is possible to prevent moisture from entering the expandable pipe 2 even when it rains.

On the other hand, the expansion device 5 is installed on the jack mount 13 as shown in FIG. However, any device may be adopted as long as it can extend and shorten the telescopic tube 2 in the vertical direction along the hanging member 15 .

A cable hook 52 is provided at the tip of the cable 51 , and the cable hook 52 can be attached to the annular metal fitting 23 near the upper end of the telescopic tube 2 . The telescopic device 5 can extend or shorten the telescopic tube 2 by adjusting the length of the cable 51 via the winch, as shown in FIGS. 6(a) and 6(b).

According to the anti-scattering device 1 having such a configuration, by covering the suspension member 15 with the expansion tube 2, the suspension member 15 can be protected from the environment where it is exposed to wind and rain. It is possible to reduce the amount of rust generated even when the suspending member 15 is used for such a long period of time.

In addition, for the expansion pipe 2 covering the hanging member 15, the cylindrical portion 3 made of a material capable of preventing water droplets such as rust juice and powder such as rust powder from passing through and preventing them from diffusing to the surroundings should be used. Therefore, even if the suspension member 15 is rusted, it is possible to more effectively prevent rust juice and rust powder from scattering. Therefore, when the suspension members 15 are used in the lift-up construction method, there is no risk of staining the outer frame 11 or the roof 12 under construction. In addition, the site near the construction site can be protected from rust juice and rust powder, and the surrounding environment is not adversely affected.

Next, a method for lifting the roof 12 using the anti-scattering device 1 described above will be described. 4 below.

<How to install the anti-scattering device>
First, as shown in FIG. 3, the center hole jack 14 and the hanging member 15 attached thereto are laid on the ground, and the telescopic tube 2 in a contracted state is passed through the hanging member 15 .

After that, as shown in FIG. 2, a connector 16 for connecting with the roof 12 is attached near the lower end of the hanging member 15 . In the present embodiment, a clevis is used as the connector 16, but it is not limited to this.

On the other hand, as shown in FIG. 4(a), the outer skeleton 11 of the building 10 to be constructed is constructed, and the jack mount 13 is installed at a predetermined height position. At the same time, inside the outer skeleton 11, the roof skeleton 12a is constructed and supported by the shoring 17 in the work space on the ground.

Next, as shown in FIG. 4B, the suspension member 15 and the center hole jack 14 through which the expansion pipe 2 is passed are erected, and the center hole jack 14 is supported by the jack base 13, and the suspension member 15 The roof skeleton 12a and the hanging member 15 are connected via the attached connecting tool 16. - 特許庁

After that, as shown in FIG. 5, the extension device 5 is installed at a predetermined position on the jack mount 13, and the cable 51 of the extension device 5 is pulled out to place the cable hook 52 in a contracted state near the upper surface of the roof skeleton 12a. It is connected to an annular fitting 23 provided near the upper end of the extensible tube 2 placed.

By the above work, the anti-scattering device 1 is installed in the facility for carrying out the lift-up construction method. Along with the installation work of the expansion device 5, the roof skeleton 12a is supported by the hanging members 15 and the shoring 17 is removed.

Next, a procedure for constructing the roof 12 while protecting the hanging members 15 with the anti-scattering device 1 and lifting the roof 12 by the lift-up construction method will be described.

<Lift-up method>
As shown in FIG. 6(a), the operation of lifting the roof frame 12a by the hanging member 15 is stopped at a predetermined height position to secure a work space below the roof frame 12a, and the cable 51 of the expansion device 5 is removed. The telescopic pipe 2 is extended by being rolled up to cover the hanger 15 exposed between the jack base 13 and the roof skeleton 12a.

In this way, during the suspension period of the lifting operation, the suspension material 15 is covered with the expansion pipe 2, and the work space formed below the roof frame 12a is used to finish the ceiling of the roof frame 12a. , and the roof 12 is constructed.

At this time, the telescopic pipe 2 may be left connected to the telescopic device 5, but for example, as shown in FIG. Alternatively, the telescopic tube 2 may be supported on the jack base 13 by tying the annular fitting 23 provided near the upper end of the telescopic tube 2 and the tying support 18 with a tying tool 19 such as a string material. In this way, when a plurality of suspension members 15 are used in the lift-up construction method, the extension device 5 can be reused, and the cost of the scattering prevention device 1 can be reduced.

Thereafter, during the lifting operation for lifting the roof 12, as shown in FIG. 6B, the expansion pipe 2 is contracted by letting out the cable 51 of the expansion device 5, and the jack frame 13 and the roof skeleton 12a are suspended. The material 15 is exposed so as to be visible.

In this state, the roof 12 is lifted to a desired height using the center hole jack 14 and the hanging members 15 as shown in FIG.

According to the lift-up construction method, when the suspended roof 12 is stopped for a predetermined period, the exposed part of the hanging member 15 is covered with the expansion pipe 2, and the hanging member 15 is exposed during the lifting operation. As a result, while the work of lifting the roof 12 can be carried out while visually confirming the state of the hanging members 15, the environment where the hanging members 15 are exposed to wind and rain when the period of stopping at the predetermined height position is long. can be protected from

Therefore, it is possible to reduce the amount of rust generated while ensuring safety, and even if the hanging member 15 is rusted, water droplets such as rust juice and powder such as rust powder are prevented from scattering. Therefore, the building 10 constructed by the lift-up construction method can be maintained in high quality.

The anti-scattering device 1 and the lift-up method using the anti-scattering device 1 of the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

For example, in this embodiment, the cable hook 52 is installed on the annular metal fitting 23 provided near the upper end of the telescopic tube 2, and the telescopic tube 2 in the contracted state is as shown in FIG. 6(b). In addition, although the configuration is such that the fuel is stored near the roof 12, the configuration is not necessarily limited to this. For example, the cable hook 52 may be installed on the annular fitting 23 provided near the lower end of the telescopic tube 2 , and the telescopic tube 2 in a contracted state may be stored near the lower surface of the jack mount 13 . In this case, the annular fitting 23 provided near the upper end of the telescopic tube 2 and the fastening support 18 provided on the jack base 13 are always fastened with the fastening tool 19 as shown in FIG. .

In the present embodiment, the expandable tube 2 is composed of the cylindrical portion 3 and the core material 4, but the configuration is not necessarily limited to this. If a stretchable material is used, the core material 4 may not be used.

Furthermore, the expansion pipe 2 may have a color that takes into consideration the surrounding environment of the construction site, for example, or may have a warning color that clearly shows the position of the hanging member 15 .

In the present embodiment, the expansion and contraction tube 2 is expanded and contracted by one expansion and contraction device 5, but this is not necessarily limited to this. . By doing so, it is possible to prevent the expansion/contraction pipe 2 from coming into contact with the hanging member 15 when the expansion/contraction pipe 2 is expanded and contracted.

1 Scattering prevention device 2 Expansion tube 21 Insertion port 22 Receipt port 23 Annular fitting 3 Cylindrical part 4 Core material 5 Expansion device 51 Cable 52 Cable hook 6 Tightening jig

10 Building 11 Outer frame 12 Roof 13 Jack mount 14 Center hole jack 15 Hanging material 16 Connector 17 Shoring 18 Tightening support 19 Tightening tool

Claims (2)

In a lift-up construction method in which a part of a building to be constructed is lifted after ground assembly, a scattering prevention device for preventing scattering of water droplets and powder adhering to a lifting member for lifting a part of the building ,
a cylindrical expansion tube that covers the suspension member;
an expansion device for expanding and contracting the expansion tube along the hanging member;
The anti-scattering device , wherein the expansion devices are arranged in pairs on both sides of the expansion tube in the diametrical direction . A lift-up construction method using a scattering prevention device that lifts a part of a building to be constructed after ground assembly,
The anti-scattering device is
A tubular expansion pipe covering a hanging member for lifting an object to be lifted;
an expansion device for expanding and contracting the expansion tube along the hanging member;
Suspending a part of the building with the suspension material through which the expansion pipe penetrates,
During the suspension period of the lifting operation, the expansion pipe is extended through the expansion device to cover the exposed portion of the suspension member,
A lift-up construction method characterized in that, at the start of a lifting operation, the expansion pipe is contracted via the expansion device to expose the hanging member.

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