JP7433118B2 - Construction method of wall unit and workbench - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act March 2, 2020 (tentative name) Yokohama Kanazawa Logistics Center new construction project work site (1-3-3 Yukiura, Kanazawa-ku, Yokohama, Kanagawa Prefecture)

TECHNICAL FIELD The present invention relates to a method for constructing a wall unit as a base for an exterior panel of a building, and a workbench for assembling the wall unit.

BACKGROUND ART In the structure of the exterior wall of a building, it is known that a sandwich panel, which is constructed by sandwiching a heat insulating material between two steel plates, is attached to a vertical rim as an exterior panel.
When constructing this structure, it is common to fix the base vertical rim to the building frame in advance and integrate it, and then fix the exterior panels to the vertical rim.

The vertical rim, which will serve as the base for the exterior panels, will be erected and integrated with the building frame using the following steps.
(1) Temporarily assemble the concrete retaining steel and the rim on the work yard.
(2) Lift up the temporarily assembled concrete retaining steel members and rim and erect them into the building frame.
(3) Make adjustments while checking the construction accuracy of each rim before final tightening.

In addition, a method is known in which exterior wall materials are assembled into units using ground assembly, as described in the following patent documents.

Japanese Patent Application Publication No. 2001-269826 Japanese Patent Application Publication No. 2017-155489 Japanese Unexamined Patent Publication No. 62-025644 Japanese Patent Application Publication No. 2004-68523 Japanese Patent Application Publication No. 2001-317208

The conventional method of building a vertical rim has the following problems.
(a) After the rim is installed on the building frame, adjustment work is required for each rim, which is time-consuming. Furthermore, adjustment may not be possible depending on the construction accuracy.
(b) Because the construction accuracy of the hull frame was not maintained during erection, the spacing between the concrete retaining steel and the exterior panels was not uniform, and this spacing could only be determined after the exterior panels were constructed. For this reason, it is not possible to install interstory covering materials during the foundation assembly stage.
(c) Since the interlayer sealing material will be installed after the exterior panels are installed, work around the outer periphery of each floor will need to be postponed.

Furthermore, the method of constructing unitized exterior wall materials as disclosed in the patent document has the following problems.
(d) In order to improve the construction accuracy of the exterior wall unit, the work platform (frame) for ground assembly must be highly accurate. However, none of the patent documents describes the accuracy of the workbench.
(e) When assembling the foundation in an erected state as in Patent Documents 1 and 2, it takes time and effort to construct a foundation frame to hold the exterior material in the erected state.
(f) The order of construction of the exterior panels is determined based on the form of the fitting portions between the upper and lower, left and right exterior panels. For this reason, the order in which the exterior wall units are to be built is determined, and flexible construction, such as constructing only a portion first in accordance with the progress of construction, is not possible.

An object of the present invention is to provide a method for constructing a wall unit that does not require adjustment work during erection, and a workbench for assembling the wall unit.

A first invention of the present application made in order to solve the above-mentioned problems includes a concrete fixing steel material, a plurality of vertical rims that are orthogonal to the concrete fixing steel material and whose upper ends are connected to the concrete fixing steel material, and a plurality of the vertical rims. A method for constructing a wall unit, which comprises a leg fixing member disposed over the lower end of the edge and connecting the lower ends of a plurality of vertical edges , and serves as a base for an exterior panel of a building, the method being applied to a work yard. a step of placing the concrete fixing steel material, a plurality of the vertical rims, and the leg fixing material on the upper surface of the placed workbench; a step of respectively connecting the rim and the leg fixing material and constructing the wall unit with ground assembly; a step of fixing an interlayer blocking material made of rock wool to the concrete fixing steel of the wall unit ; To provide a method for constructing a wall unit, comprising the steps of attaching a hanging bolt to a concrete-fixing steel material of the wall unit and lifting it up, and erecting the lifted wall unit at a predetermined position in a building frame .
A second invention of the present application is the method for constructing a wall unit of the first invention, in which the concrete retaining steel material is a steel material for closing the interlayers over the length direction of the lower end of the surface that will be the exterior panel side at the time of erection. A method for constructing a wall unit is provided.
A third invention of the present application is used in the method for constructing a wall unit of the first invention or the second invention, and includes a concrete fastening steel material, a plurality of vertical rims orthogonal to the concrete fastening steel material, and having upper ends connected to the concrete fastening steel material. , and a leg fixing member disposed across the lower ends of the plurality of vertical rims and connecting the lower ends of the plurality of vertical rims. The workbench includes a pedestal placed on the floor of a work yard, and a pedestal height adjuster provided between the floor of the work yard and the pedestal, the pedestal comprising: A workbench is provided, which is made of a long shaped steel material and is characterized in that a plurality of the pedestals are arranged in parallel with each other at a predetermined interval.
A fourth invention of the present application is characterized in that, in the workbench of the third invention, a spacer having a predetermined thickness and a predetermined width is provided on the upper surface of the mount located at an end of the parallel mounts. , provide a workbench.

The present invention can obtain the following effects by means for solving the above problems.
(1) Since highly accurate wall units are assembled into the ground, there is no need to check the accuracy of each unit during construction and make adjustments, which shortens the construction period.
(2) In order to erect a wall unit with high precision, interlayer sealing material can be attached to the wall unit in advance. This eliminates the need to fill in interlayer sealing material after installing exterior panels, and there is no need to postpone work around the outer periphery of each floor.
(3) By adjusting the height of the plurality of pedestals using the respective pedestal height adjusters, the upper surfaces of the plurality of pedestals can be made flush, so that a highly accurate wall unit can be assembled into the ground.
(4) Since the workbench consists of a pedestal made of shaped steel and a pedestal height adjuster that supports the pedestal, it can be easily constructed.
(5) Since the exterior panels are constructed after the wall units have been erected, the order in which the wall units are erected is not determined by the construction order of the exterior panels, and only a portion of the wall units can be erected first according to the progress of construction. etc., allows for flexible construction.

A perspective view of a wall unit in the wall unit construction method of the present invention Enlarged view of the upper part of the vertical rim of the wall unit Enlarged view of the lower part of the vertical rim of the wall unit An explanatory diagram of the ground assembly state of the wall unit A perspective view of the workbench of the present invention Explanatory diagram (1) of the construction method of the wall unit of the present invention Explanatory diagram (2) of the construction method of the wall unit of the present invention Explanatory diagram (3) of the construction method of the wall unit of the present invention Explanatory diagram (4) of the construction method of the wall unit of the present invention Explanatory diagram (5) of the construction method of the wall unit of the present invention Explanatory diagram (6) of the construction method of the wall unit of the present invention Explanatory diagram of the arrangement of the frame and concrete retaining steel Explanatory diagram (7) of the construction method of the wall unit of the present invention Explanatory diagram (8) of the construction method of the wall unit of the present invention

Embodiments of the present invention will be described below. In addition, the vertical direction and height direction of the wall unit in this explanation represent the direction when the wall unit is installed in a building, and the front and back sides respectively refer to the exterior panel side and building frame side when installed in the building. represent.

[Example]
[1] Wall unit and workbench (1) Structure of wall unit The wall unit 1 constructed by the wall unit construction method of the present invention serves as a base for an exterior panel of a building. The exterior panel is generally a sandwich panel constructed by sandwiching a heat insulating material between two steel plates.
The wall unit 1 consists of a concrete fixing steel member 2 and a plurality of vertical edges 3 provided orthogonally to the concrete fixing steel member 2 (FIG. 1). Then, an interlayer sealing material 41 is provided on the surface of the web of the concrete-fixing steel material 2 of the wall unit 1 over the length direction of the concrete-fixing steel material 2 (FIG. 2).
In addition, a leg fixing member 5 is provided at the lower end of the vertical furring 3 over a plurality of the vertical furrings 3 (FIG. 3).

(2) Concrete fixing steel material The concrete fixing steel material 2 is a steel material that constitutes the end of the concrete floor slab of a building, and is made of channel steel, angle material, square material, etc.
The concrete fixing steel material 2 in this embodiment is a channel steel, and the surface of the web that will be the exterior panel side during erection is the side to which the exterior panel is attached, and an L-shaped fixture 21 is attached to the lower flange, which will be the lower surface during erection. , one side is fixed along the length direction of the lower flange, and the other side protruding downward is placed opposite to each other with a distance of the width of the vertical flange 3 as a set, and the number of vertical flange 3 is determined. Provide a portion.
The upper end of the vertical furring 3, which projects downward and is arranged between the opposite sides, is connected to the fixture 21 via a bolt.

(3) Vertical furring rim The vertical furring 3 is a member for fixing the exterior panel, and is made of, for example, a steel material with a square cross section.
The surface of the vertical rim 3 on the exterior panel side protrudes by a predetermined distance from the surface of the web of the concrete fixing steel 2 toward the exterior panel. This distance becomes the interlayer width, which is the distance between the outer surface of the concrete fixing steel material 2 and the inner surface of the outer wall panel when the wall unit is built into a building.

(4) Interlayer Closure Material The interlayer closure material 41 is made of rock wool, which is a fireproof material, and has a height of 50 mm or more, and is fixed to the surface of the web of the concrete fixing steel material 2.
For example, when the interlayer width of the building is 20 mm, the interlayer closing material 41 has a thickness of 25 mm, which is thicker than the interlayer width of the building.

(5) Interlayer blocking steel material An interlayer blocking steel material 42 may be provided on the surface of the concrete fixing steel material 2.
The interlayer closing steel material 42 is fixed below the interlayer closing material 41 and along the lower end of the web surface of the concrete fixing steel material 2 by welding or the like in a factory or on site. If the fixture 21 protrudes forward from the web surface, it is also fixed to the fixture 21 at the same time by welding or the like.
The interlayer baffle steel material 42 is a deformed steel bar, for example, D16 (outermost diameter: 18 mm), which is slightly smaller than the interlayer width. Further, instead of the deformed steel bar, a steel plate having a thickness of 1.6 mm or more may be used.

(6) Leg fixing material The leg fixing material 5 is made of an L-shaped steel material, and the inner surface of one side is in contact with the back surface of the vertical rim 3, and the inner surface of the other side is attached along the lower end of the vertical rim 3. Place it. On the inner surface of the other side, a fixture 51 similar to the fixture 21 provided on the concrete fixing steel member 2 is provided symmetrically, and the lower end of the vertical flange 3 is connected via a bolt.

(7) Structure of workbench The wall unit 1 performs ground assembly on a workbench 7 provided in the work yard (FIG. 4).
The workbench 7 consists of a pedestal 71 placed on the floor of the work yard and a pedestal height adjuster 72 that supports the pedestal 71, and the plurality of sets of pedestals 71 and pedestal height adjusters 72 are arranged at predetermined intervals. They are arranged in parallel (Figure 5).

(8) Frame The pedestal 71 is a long steel section with a flat upper surface, and is made of, for example, an H-section steel with one flange arranged substantially parallel to the floor surface.
A plurality of pedestals 71 are arranged substantially parallel to each other at predetermined intervals.

(9) Frame height adjuster The pedestal height adjuster 72 is provided between the floor of the work yard and the pedestal 71.
The pedestal height adjuster 72 is, for example, a jack, supports the lower flange of the pedestal 71 from both sides, and is arranged at appropriate predetermined intervals in the length direction of the pedestal 71.
By providing a plurality of pedestal height adjusters 72 for one pedestal 71, the upper surface of the pedestal 71 can be easily made into a horizontal plane.
Further, by adjusting the height of the plurality of mounts 71 using the respective mount height adjusters 72, the upper surfaces of the plurality of mounts 71 can be made flush, so that the wall unit 1 can be assembled with high precision.

(10) Spacer A spacer 73 is provided on the upper surface of the pedestal 71 located at one end of the pedestals 71 arranged in parallel.
The spacer 73 is a rectangular steel plate having the same thickness as the interlayer width, and is provided at a predetermined interval along the length of the pedestal 71 toward the opposite end of the pedestal 71 arranged in parallel.
The number and spacing of the spacers 73 are such that they can support the concrete fixing steel 2 placed on top.

[2] Method of constructing a wall unit Next, a method of constructing a wall unit of the present invention will be described.

(1) Construction of a workbench The pedestal height adjuster 72 is placed at a preset position on the work yard, and the pedestal 71 is placed on top of it (FIG. 6). An iron plate may be laid on the work yard, and the pedestal height adjuster 72 may be placed on it.
A plurality of pedestals 71 are arranged in parallel, and the pedestal 71 at one end is provided with a spacer 73 on its upper surface.
Then, by operating the pedestal height adjuster 72 while checking the level of the top surface of each pedestal 71, and making the top surfaces of all the pedestals 71 horizontal and flush, the workbench 7 has a horizontal surface.
Since the workbench 7 is constituted by the pedestal height adjuster 72 and the pedestal 71, it can be easily relocated, and can easily accommodate changes in the location of the work yard, for example.

(2) Placing the concrete fixing steel material First, the concrete fixing steel material 2 is placed on the workbench 7 (FIG. 7).
The concrete fixing steel material 2 is placed on the pedestal 71 at the end, and the web surface is placed on the pedestal 71 with the web surface as the lower surface so that the bottom surface of the web to which the fixing tool 21 is fixed in advance is on the other parallel pedestal 71 side. Place it on. At this time, the concrete fixing steel material 2 is placed on the spacer 73 with the upper end of the web protruding from the end where the spacer 73 is located.
Further, even when the interlayer closing steel material 42 is provided, since the interlayer closing steel material 42 is smaller than the interlayer width, it fits into the space raised by the spacer 73 and does not interfere with the pedestal 71.

(3) Placing the vertical trunk rim and leg fixing material Next, the vertical trunk rim 3 is placed on the workbench 7 (FIG. 8). The vertical flange 3 can be easily positioned because it is arranged in accordance with the fixture 21 of the concrete fixing steel material 2 that has already been placed. At this time, since the concrete fixing steel material 2 is placed on the spacer 73 whose thickness is the same as the interlayer width, the vertical rim 3 disposed on the top surface of the pedestal 71 has the same thickness as the spacer 73. The vertical furring 3 can be positioned at a position that is shifted by the interlayer width and protrudes from the web surface of the concrete fixing steel material 2 by the interlayer width.
Then, the leg fixing material 5 is placed along the lower end of the arranged vertical trunk rim 3 (FIG. 9). Since the fixing tool 51 of the leg fixing member 5 is placed in alignment with the vertical torso 3, it can be easily positioned.

(4) Final tightening Then, the bolts connecting the concrete fixing steel 2 and the vertical rim 3 and the bolts connecting the vertical rim 3 and the leg fixing members 5 are fully tightened, and the concrete fixing steel 2 and the vertical rim 3 are fully tightened. , the leg fixing member 5 is integrated (FIG. 10).
The height and horizontality of each pedestal 71 of the workbench 7 are adjusted by a pedestal height adjuster 72, so that the workbench 7 is horizontal and flush. Therefore, the wall unit 1 consisting of the concrete retaining steel 2, the vertical rim 3, and the leg fixing members 5, which are integrated on the workbench 7, can be assembled into the ground with high precision without the need for adjustment during erection.

(5) Attaching the interlayer sealing material The interlayer sealing material 41 is attached to the web surface of the concrete fixing steel material 2 (FIG. 11).
Since the part of the web surface of the concrete fixing steel material 2 to which the interlayer sealing material 41 is fixed protrudes from the frame 71, it can be easily attached even when the wall unit 1 is placed on the workbench 7. I can do it.
In this embodiment, the interlayer sealing material 41 is applied after the final tightening, but it may be performed before the final tightening or simultaneously with the final tightening.

(5.1) Arrangement relationship between pedestal and concrete fixing steel The interlayer blocking material 41 is fixed to the surface of the concrete fixing steel 2 protruding from the pedestal 71.
For this reason, it is preferable that the protrusion length H _P of the concrete fixing steel member 2 from the pedestal 71 is longer than the height H ₄₁ of the interlayer covering material 41 (FIG. 12).
The concrete fixing steel material 2 is placed on the spacer 73 of the frame 71.
The height of the concrete fixing steel material 2 is H2, the height of the interlayer blocking material 41 is _H41 , the height of the interlayer blocking steel material 42 is _H42 , the width of the spacer 73 is _H73 , the distance between the interlayer blocking steel material 42 and the spacer 73. When is d,
H ₂ -H ₄₁ -H ₄₂ >H ₇₃ +d
By determining the width H ₇₃ of the spacer 73 and the placement position of the interlayer closing steel material 42 on the pedestal 71 _so that can be made longer than the height H41.

(6) Erecting the wall unit Attach hanging bolts to the concrete fixing steel 2 of the wall unit 1 (Figure 13) and lift it up using a crane or the like.
Since the wall unit 1 is not attached with an exterior panel, it is light in weight, does not deform when lifted, and maintains accuracy during assembly.
Then, the lifted wall unit 1 is installed in a predetermined position of the building frame.
Since the highly accurate wall unit 1 can be erected as is, there is no need for adjustment work while checking the erecting accuracy for each unit during erecting, and the construction period is shortened.

(7) Construction of wall structure The exterior panel 8 is placed on the surface of the built-in wall unit 1 to construct the wall structure (FIG. 14).
The interlayer sealing material 41 attached to the wall unit 1 in advance is crushed by the exterior panel 8 and fits in a state where the interlayer is closed.
Since the built-in wall unit 1 has high precision, the interlayer width W is always constant, and even the interlayer closing material 41 installed in advance can close the interlayer.
Further, since there is no work to fill the interlayer sealing material 41 after the exterior panel 8 is attached, there is no need to postpone work around the outer periphery of each floor.
Since the exterior panels 8 are constructed after the wall units 1 are built, the order in which the wall units 1 are constructed is not determined by the construction order of the exterior panels 8, and only some parts of the wall units 1 are installed first depending on the progress of the construction. Flexible construction can be carried out, such as building in
Since the interstory covering steel material 42 is located below the interstory covering material 41, the interstory covering steel material 42 prevents the interstory covering material 41 from falling during an earthquake.

1 Wall unit 2 Concrete fixing steel material, 21 Fixing device 3 Vertical rim 41 Interlayer blocking material, 42 Interlayer blocking steel material 5 Leg fixing material, 51 Fixing device 6 Hanging bolt 7 Work platform, 71 Frame, 72 Frame height adjustment tool 8 Exterior Panel 9 Floor slab

Claims (4)

a concrete retaining steel material, a plurality of vertical furrows perpendicular to the concrete retaining steel materials and having upper ends connected to the concrete retaining steel materials, and a plurality of vertical furrows disposed across the lower ends of the plurality of vertical furrows, A method for constructing a wall unit, which is comprised of a leg fixing material that connects the lower end, and serves as a base for an exterior panel of a building ,
placing the concrete retaining steel material, the plurality of vertical rims, and the leg fixing material on the top surface of a workbench placed in a work yard;
Connecting the placed concrete retaining steel material and the vertical rim, and the vertical rim and the leg fixing material, respectively, and constructing the wall unit using ground assembly;
fixing an interlayer sealing material made of rock wool to the concrete fixing steel material of the wall unit;
The method is characterized by comprising the steps of attaching hanging bolts to the concrete fixing steel of the wall unit, lifting it up, and erecting the lifted wall unit at a predetermined position in the building frame .
Construction method of wall unit. The method for constructing a wall unit according to claim 1,
The concrete retaining steel material is characterized in that it has a steel material for closing the interlayers over the length direction of the lower end of the surface that will be on the exterior panel side during erection.
Construction method of wall unit. Used in the method for constructing a wall unit according to claim 1 or 2, a concrete retaining steel material, a plurality of vertical rims that are orthogonal to the concrete retaining steel material and whose upper ends are connected to the concrete retaining steel materials, and a plurality of the vertical members. A workbench for assembling a wall unit, which serves as a base for an exterior panel of a building, and comprises a leg fixing member disposed over the lower end of the rim and connecting the lower ends of a plurality of vertical rims. hand,
a pedestal placed on the floor of the work yard;
a pedestal height adjuster disposed on the floor of the work yard and supporting the pedestal;
The pedestal is a long shaped steel material,
A plurality of the mounts are arranged in parallel with each other at predetermined intervals,
Workbench. The workbench according to claim 3,
A spacer having a predetermined thickness and a predetermined width is provided on the upper surface of the mount located at the end of the mounts arranged in parallel.
Workbench.

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