JP7349007B2 - Ceiling base structure - Google Patents

Description

The present invention relates to a building base bar material used for building ceiling bases, etc., and a ceiling base structure using the same.

Conventionally, for the ceiling of a building, a structure in which a ceiling board is attached to a hanger or the like, and a ceiling board is attached to the ceiling board is known as a ceiling base. Configure.

For example, the field edge receiver and its holding member described in Patent Document 1, as shown in FIG. A field edge receiver 72 having horizontal plates 68, 68 on the upper and lower sides and having a U-shaped cross section and a bent piece 70 on the tip side of the horizontal plate 68 is fitted into the field edge receiver holding portion 65. However, the upper surface of the field edge receiver 72 is pressed and fixed with a pressing piece 62, and since the field edge receiver 72 has a bending piece 70, it is sufficient to reduce the height of the side plate. This provides a field edge support 72 with excellent strength, and also enables construction of ceilings with narrow ceiling spaces.

Further, Patent Document 2 describes a field edge support that is formed in a groove shape by a web and upper and lower flanges and supports a field edge via a clip, and is used to screw the clip to the web. By forming a mark for confirming the position of the pilot hole and the pilot hole on the web, the construction work of the ceiling base material can be easily performed.

The field edge receiver described in Patent Document 3 includes a main body portion formed in an elongated rectangular flat plate shape, and a first main body portion formed in a flat plate shape and protruding from a part of the edge on one side in the width direction of the main body portion. By having a protruding part and a second protruding part protruding from the tip of the first protruding part, earthquake resistance is improved than before, and the third protruding part orthogonal to the main body part, etc. This increases the cross-sectional moment of inertia and increases the bending rigidity and torsional rigidity of the field edge support material.

Japanese Patent Application Publication No. 8-93123 JP 2015-94068 Publication JP2013-32644A

Now, the field edge support described in Patent Document 1 is provided with a bent piece 70 to ensure strength, but this adds weight to the bent piece, so it is necessary to reduce the weight of the field edge support. In addition, the field edge receiver described in Patent Document 2 has a groove-shaped shape formed by a web and upper and lower flanges, and normally in the case of this shape, the plate thickness of the field edge receiver is thickened. There is a problem in that it goes against the weight reduction because it ensures rigidity.
The field edge receiver described in Patent Document 3 is said to have high bending rigidity due to the third protrusion, etc., but it is possible to cut out a part of the field edge receiver, such as by providing a notch in the third protrusion. Since it has a chipped shape, there is a problem that this part lacks strength.

The present invention has been made to solve the above problems, and provides a bar material for the foundation of a building that is lightweight, has sufficient strength, and is excellent in workability and economy, and a ceiling using the same. The purpose is to provide an underlying structure.

In order to solve the above-mentioned technical problems, the present invention, as shown in FIG. It has a U-shaped cross section, consisting of a first rising plate part 6 bent at right angles from one side, and a second rising plate part 8 bent at right angles from the other side, and The end portions of the steel plates are bent inward and folded back to the rising plate portions 6 and 8, respectively, to form folded plate portions 10 and 12 in which the steel plates overlap each other doubly.

In the building base bar material 2 according to the present invention, the ratio of the folding width of the folding plate parts 10 and 12 to the rising width of the first and second rising plate parts 6 and 8 is 30% to 30%. 50%, preferably 50% to 65%, more preferably 65% to 85%.

In the building base bar material 22 according to the present invention, the folded plate part is further extended to a part of the base plate part, and second folded plate parts 24 and 26 are formed in which the steel plates overlap each other. It is the composition.

In the building base bar material 2 according to the present invention, the thickness of the thin lightweight steel plate is 0.2 mm or more and 1.2 mm or less, preferably 0.3 mm or more and 0.8 mm or less, and more preferably 0.4 mm or more and 0.4 mm or less. It is configured to have a thickness of 6 mm or less.

The building base bar material 2 according to the present invention has a structure in which the substrate portion 4 is provided with a plurality of groove line portions having a V-shaped cross section or a honeycomb-like uneven portion formed in the longitudinal direction.

Furthermore, the building base bar material 2 according to the present invention is configured to be used with the first and second upright plate parts 6 and 8 oriented horizontally and the base plate part 4 oriented vertically.

The base bar material 2 for a building according to the present invention has a structure in which the base bar material 2 is used as a ceiling base material and as a frame support material for supporting a frame material.

The present invention is a ceiling base structure using any of the building base bars described above, in which the base base bar 2 is attached to a hanging tool from the ceiling, and the first rising plate portion 6 thereof is attached to a hanger from the ceiling. The substrate part 4 is vertically supported on the upper side, the edge material 32 is placed under the base bar material 2 in a direction perpendicular thereto, and the edge material 32 is attached to the clip 30 using a clip 30. and holding the base bar material 2, and the clip is integrally formed with side plate parts 36, 36 in a direction orthogonal to the base bar material 2, and front end parts 41, 41 of the side plate parts. The base bar material 2 is attached to the front end portions 41, 41 of the side plate portions and the receiving plate portions 38, 38. At the same time, the upper locking parts 40, 40 of the clip 30 are locked to the first rising plate part 6 of the base bar material 2, and the side plate part 36 and the receiving plate part 38 The structure is such that the base plate portion 4 of the base bar material 2 is held by the base bar material 2.

In the ceiling base structure according to the present invention, the clip 30 includes a flat placing portion 35 on which the field edge material 32 is placed, and the side plate portions rising at right angles from the left and right ends of the placing portion 35, respectively. 36, 36, and the front end portions 41, 41 of the side plate portion 36 (39) formed by bending the upper part of a part of the side plate portion at right angles, and the base plate formed integrally therewith. The side plate portion 36 has the receiving plate portions 38, 38 forming a plane parallel to the substrate portion 4 of the bar material 2, and the locking portions 40, 40 extending from the upper part of the receiving plate portion. , 36 and the receiving plate parts 38, 38, the base plate part 4 of the base bar material 2 is applied, and at the same time the locking parts 40, 40 of the clip 30 are attached to the base bar material 2. The substrate section 4 of the base bar material 2 is held by the side plate section 36 and the receiving plate section 38.

According to the bar material for the base of a building according to the present invention, a thin, lightweight steel plate is bent and formed, and includes a base plate portion, a first rising plate portion bent at right angles from one side thereof, and a first rising plate portion bent at right angles from the other side. It has a U-shaped cross section consisting of a second rising plate part, and the ends of the steel plate are bent inward and folded back to the first and second rising plate parts, and the steel plates are folded double overlapping each other. Since the plate portion is formed, it is possible to reduce the weight of the base bar material, ensure sufficient strength, and have the effect of being excellent in safety and economy.

According to the building base bar material according to the present invention, the ratio of the folded width to the rising width is set in the range of 30% to 50%, preferably 50% to 65%, and more preferably 65% to 85%. Therefore, it is possible to select a form according to the degree of weight reduction, strength, etc., and it has the effect that it can be used for a variety of purposes.

According to the bar material for the base of a building according to the present invention, since the folded plate part is further extended to a part of the base plate part and the second folded plate part is formed in which the steel plates overlap each other, the strength against bending etc. This has the effect of further increasing.

According to the base material for a building according to the present invention, since the substrate portion has a groove line portion or a honeycomb-like uneven portion, the base material has a cushioning property or a restoring force. This has the effect of making it possible to obtain materials with desired characteristics, such as increased elasticity.

According to the building base bar material according to the present invention, it can be used with the first and second rising board parts facing horizontally and the base plate facing vertically, and can also be used as a field edge receiving material to support field edge materials. Since it is configured to be used, it has the effect of ensuring strength against bending and the like.

According to the ceiling base structure according to the present invention, the base plate part of the base bar material is applied to the front end part of the side plate part and the receiving plate part, and at the same time, the upper locking part of the clip is connected to the first rising plate of the base bar material. Since the structure is such that the substrate part of the base bar material is held by the side plate part and the receiving plate part, the weight of the base bar material can be reduced, and the side plate part of the clip can hold the base part of the base bar material by the side plate part and the receiving plate part. Since the side plate part is formed in a direction perpendicular to the base plate part, the side plate part has a rib-like function for the substrate part of the base bar material, and has the effect of effectively reinforcing the thin board part and increasing its strength. .

FIG. 2 is a perspective view of a base bar material for a building according to an embodiment. It is a figure which shows the cross section of the bar material for the base of a building based on embodiment, (a) has a folded board part, (b) further has a second folded board part. FIG. 3 is a diagram showing the patterns (uneven shapes) of the substrate parts of various base bar materials, (a) is a flat (patternless) one, and (b) is a diagram showing a plurality (seven in this case) of a V-shaped cross section. (c) has a groove line portion, and (c) has a honeycomb-like uneven portion. 2 is a diagram showing the cross section of each material regarding base bar materials made of various materials, (a) is material 1, (b) is material 2, (c) is material 3, (d) is material 4, (e ) indicates material 5, and (f) indicates material 6, respectively. 1 is a diagram showing a ceiling base structure using a building base bar material according to an embodiment; FIG. It is a figure which shows the clip used for the ceiling foundation structure based on embodiment. It is a diagram showing a side surface of a ceiling base structure according to an embodiment. FIG. 3 is a diagram showing a field supporter according to a conventional example.

Embodiments of the present invention will be described below based on the drawings.
FIG. 1 shows a bar material for the foundation of a building according to an embodiment.
This building base bar material 2 can be used as a ceiling base bar material 2, for example, as a field edge support material for supporting field edge materials.

The base bar material 2 is obtained by bending a thin lightweight steel plate by pressing, roll homing, or the like. This base bar material 2 is formed from a base plate part 4, a first rising plate part 6 bent at right angles from one side, and a second rising plate part 8 bent at right angles (in the same direction) from the other side. It has a U-shaped cross section.

Furthermore, the base bar material 2 includes folded plate portions 10, each of which is bent inward from the tip of the first rising plate portion 6 and the second rising plate portion 8, and in which steel plates overlap each other. 12 are formed. The folded plate portions 10 and 12 have a shape in which a thin lightweight steel plate is folded back inward so that the steel plates are in close contact with each other or substantially in close contact with each other so as to overlap in double form.

As shown in FIG. 2(a), the base bar material 2 has a basic width (L) of the base plate portion 4 and each rising width (M) of the first rising plate portion 6 and the second rising plate portion 8. have For each rising width (M), a certain amount of folding width (N) of the folding plate portions 10 and 12 is ensured.
Here, the folding ratio (N/M×100) of the folding width (N) to the rising width (M) is in the range of 30% or more and less than 50% in terms of strength, preferably 50% or more and 65%. %, more preferably 65% or more and 85% or less. If the folding ratio is less than 30%, sufficient strength cannot be ensured.

Within the above folding ratio range, the weight of the base bar material 2 can be appropriately reduced and the strength can be ensured. In other words, if the above ratio is lowered, the weight can be further reduced, and if the ratio is increased, higher strength can be obtained.
Here, for example, the rising width (M) of the base bar material 2 is 12 mm and the folding width (N) is 10 mm, and in this case, the folding ratio is about 83% (10/12×100). In order to further reduce weight, for example, if the rising width (M) of the base bar material 2 is 12 mm and the folding width (N) is 8 mm, in this case, the above folding ratio is approximately 67% (8/12 x 100 ).

The above-mentioned thin lightweight steel plate needs to be thin and have appropriate strength, so its thickness is 0.2 mm or more and 1.2 mm or less, preferably 0.3 mm or more and 0.8 mm or less, and more preferably 0.4 mm. 0.6mm or less.
If the plate thickness exceeds 1.2 mm, the steel plate will become heavy, and if it is thinner than 0.2 mm, sufficient strength will not be obtained.

In addition, the basic width (L) of the base plate part 4 and each rising width (M) of the first rising plate part 6 and the second rising plate part 8 of the base bar material 2 are described here. , the base width (L) is 38 mm, and the rising width (M) is 12 mm.
Regarding the above dimensions, in view of the balance between weight reduction and strength of the base bar material 2, the base width (L) is set to 20 mm or more and 50 mm or less, preferably 30 mm or more and 45 mm or less, and more preferably 35 mm or more and 40 mm or less. . Further, the rising width (M) is set to 10 mm or more and 15 mm or less, preferably 10 mm or more and 14 mm or less, and more preferably 12 mm.

FIG. 2(b) shows a second base bar material 22 having another shape.
This second base bar material 22 extends the folded plate portion, bends each corner of the first and second rising plate portions and the substrate portion 4 at right angles, and also serves as a part of the substrate portion 4. It has a shape having second folded plate parts 24 and 26 which are folded back in a double overlapping state. The area of the second folding plate portions 24 and 26 overlapping with the substrate portion 4 is approximately several mm (for example, 2 to 5 mm).

The base bar materials 2 and 22 can be used in various ways, but for example, the substrate portion 4 such as the base bar material 2 is vertically erected, and the first rising plate portion 6 and the second rising plate portion 8 are It can be used with the opening 14 facing horizontally and the opening 14 having a U-shaped cross section facing sideways. In this case, the tension and compression forces on the first rising plate section 6 and the second rising plate section 8 are made stronger by the folded plate sections 10 and 12.

Specifically, the base bar material 2, etc. is used for C-shaped bar materials that have been used conventionally, such as lightweight ceiling base materials (vibration-resistant ceilings, etc.), lightweight wall base materials, ceiling wiring ducts, etc. It can be used as a substitute. In addition, due to the excellent strength of the foundation bar material 2, etc., it is used as a steady rest material that is used as a wall foundation material by spanning between studs, and as a ceiling foundation material that is used as a material between a ceiling frame and a field edge support material. It can also be effectively used as a swaying material for braces and the like that are used diagonally across the bridge. Furthermore, since a thin, lightweight steel plate is used, the steel plate is thin, so it is easy to fix with screws, etc., and the range of uses can be expected to expand.

FIG. 3 shows a pattern (irregular shape) provided on the substrate portion 4 of the base bar material 2 and the like. The figure (a) shows a flat shape, and the figure (b) shows a board part 4 having a plurality of groove line parts with a V-shaped cross section in the longitudinal direction. One groove is shown, and the other is shown with three grooves in each of the upper and lower parts.
In addition, in the same figure (c), a honeycomb-like uneven part is provided by embossing molding, a regular hexagonal pattern is formed in a concave shape, and the interval between each regular hexagon is equal to the length of one side of the regular hexagon. The range is 25% to 80%.
In addition, each plate surface of the first rising plate part 6 and the second rising plate part 8 of the base bar material 2 is flat.

Here, strength tests were conducted on the base bar material 2 and the like through in-house tests, and the results will be explained. This strength test is a strength test for ceiling base materials based on JIS A 6517, and is a test similar to the downward loading test for field support.
In addition, in this strength test, strength tests are also performed on each bar material in a form without a folded plate part and a form with a folded plate part, and the test results are compared and studied.

The test materials used in the strength test were six types, Material 1 to Material 6, all of which can be used as bar materials for the base of ceilings, etc. Among these bar materials, Materials 1 to 4 have shapes that do not have folded plate portions, and Materials 5 and 6 have shapes that have folded plate portions.
Further, each material 1 to 6 is made of the same steel material, and is made by bending a galvanized steel plate by pressing or the like.

FIG. 4 shows cross sections of the materials 1 to 6 described above. Materials 1 to 6 all have a U-shaped cross section consisting of a substrate part and upper and lower rising plate parts, and the base width (L) of the board part (from the upper end to the lower end) is 38 mm, and each rising plate part has a U-shaped cross section. The dimension (M) of the rising width (from the right end to the left end) of the plate portion is 12 mm.

Next, each material will be explained.
The material 1 shown in FIG. 3(a) has a plate thickness of 0.9 mm, and the substrate portion is flat. This is a product that has traditionally been widely used as a field edge support material.
Material 2 in FIG. 2(b) has a plate thickness of 0.6 mm, and several (seven in this case) groove line portions with a V-shaped cross section are formed in the horizontal direction by press working on the substrate portion. (shape in Figure 3(b)).
Material 3 in the same figure (c) has a plate thickness of 0.6 mm, and the entire substrate part has a honeycomb (regular hexagonal shape) concave and convex portion (a regular hexagon is formed in a concave shape) by press processing (emboss molding). (shape shown in Figure 3(c)).
The material 4 shown in FIG. 4(d) has a plate thickness of 0.6 mm, and the substrate portion is flat.

The following materials 5 and 6 are base bar materials according to this embodiment.
The material 5 shown in FIG. 5(e) has a plate thickness of 0.5 mm, and is folded back on the rising plate portion to form a folded plate portion (the base bar material 2).
The material 6 shown in FIG. 6(f) has a plate thickness of 0.5 mm, and a folded plate portion is formed in a portion of the rising plate portion and the substrate portion (the second base bar material 22).
Note that the substrate portion is flat except for materials 2 and 3.

Tables 1 and 2 show the test results.

First of all, in the above JIS standard, the maximum deflection amount is 5 mm or less (live load 740N) in the performance standard of the downward loading test (field edge support), but in this point, the above strength test (live load 744.8N) In the above, the above performance criteria were satisfied for all of the above materials 1 to 6. Similarly, the amount of residual deflection is set at 1 mm or less according to the above standard, and this also satisfies the above performance standard for all of the above materials 1 to 6.

Next, as particularly representative materials, the above-mentioned material 1 and the above-mentioned material 5 (the above-mentioned base bar material 2 with a folded plate part) will be compared. First, the plate thickness is 0.9 mm for material 1 and 0.5 mm for material 5, and material 5 is 44% thinner. The weight per unit length is 0.402 kg/m for material 1 and 0.315 kg/m for material 5, and material 5 is 21% lighter.

According to the results of the strength test (deflection), the maximum amount of deflection is 4.16 mm for material 1 and 3.74 mm for material 5, and material 5 has a smaller maximum amount of deflection than material 1. Excellent deflection strength. It is believed that this is because the strength is increased by processing the folded plate parts 10 and 12, which are formed by folding back the upright plate part of the base bar material 2.
Also, according to the results of the strength test (residual deflection), the amount of residual deflection was 0.29 mm for material 1 and 0.36 mm for material 5, and material 5 was slightly inferior to material 1. There is.

When comparing Material 5 and Material 6, Material 6 has a slightly smaller maximum deflection amount and is superior in terms of strength. This is because the folded plate portion of the material 6 extends from the rising plate portion to a part of the substrate portion. However, the amount of residual deflection of material 5 is smaller than that of material 6, and material 5 has better restoring force.
Therefore, it is preferable to select material 6 when strength is required, and material 5 when restoring force is required. However, material 5 is superior to other materials 1 to 4 in terms of strength and is also good in terms of weight reduction.

In addition, when comparing Material 4 above with Material 2 (with V-groove line part) and Material 3 (with honeycomb-like uneven part), which have the same thickness (0.6 mm), the maximum deflection amount is greater than that of Material 4. Material 2 and Material 3 are higher. Therefore, if the bar material is to have supple cushioning properties, it is sufficient to provide the substrate with an uneven pattern as in Materials 2 and 3.
Furthermore, among Material 2, Material 3, and Material 4, Material 3 has the smallest amount of residual deflection. Therefore, if a material with high restoring force is desired, the material 3 may be embossed in a honeycomb shape.

In addition, when comparing Materials 2 to 4 (all 0.6 mm thick) and Material 5 (0.5 mm thick, with folded plate part), despite the difference in thickness being 0.1 mm, The maximum amount of deflection was considerably smaller for Material 5, demonstrating the effectiveness of the folded plate portion.
In addition, when comparing material 1 above with materials 2 to 4, etc., which are thinner than this, it is found that in general, thinner materials tend to have a larger maximum deflection and lower strength, while the residual deflection is conversely It tends to decrease.

From the above test results, according to the base bar material 2 (plate thickness 0.5 mm) according to this embodiment as material 5, compared to the above-mentioned material 1 (plate thickness 0.9 mm) which has been widely used in the past, , it is possible to reduce the plate thickness by about 40 to 50%.
Moreover, the weight per unit length of Material 5 (base bar material 2) is 0.315 kg/m, and that of Material 1 is 0.402 kg/m. Therefore, the base bar material 2 can be reduced in weight by about 20% compared to the conventional product (material 1).
In addition, by performing a folding process like the folding plate part of the material 5 (base bar material 2), the edges are rounded, and operational safety is ensured, such as improving the safety of the end surface. The second base bar material 22 can also be expected to have effects similar to those of the base bar material 2.

As described above, the base bar materials 2 and 22 have high strength with respect to the amount of deflection, and therefore are excellent in use as base bars for ceilings, for example, as a field edge receiving material for receiving field edge materials. Additionally, it can be used as a lightweight ceiling base material, ceiling wiring duct, or lightweight wall base material. In short, it can be used as a substitute for the C-bar shape used in the above materials.
In addition, since it is possible to reduce the plate thickness, it is easy to fix with screws, and it can be used for a wide variety of purposes.

FIG. 5 shows a ceiling base structure using the base bar material 2 described above.
In this ceiling base structure, the base bar material 2 is used as a frame receiving material, and a clip 30, a frame material 32, a hanger 34, etc. are also used.

As shown in FIG. 6, the clip 30 has a flat placing portion 35 and side plate portions 36, 36 that stand up at right angles from the left and right ends of the placing portion 35, respectively.
Then, the upper and lower intermediate parts of the side plate parts 36, 36 are cut out by about half (the width of the plate) in the front and back, and the side plate parts 39, 39 on the upper side of the upper part of the cut out part 37 are cut out. A part (approximately a half) of It has a shape that is bent to provide locking parts 40, 40.
The receiving plate parts 38, 38 are formed integrally with the front end parts 41, 41 of the side plate parts 39, 39, are perpendicular to the side plate parts 39, 39, and are connected to the substrate of the base bar material 2 held by the clip 30. The portion 4 forms a parallel plane.

The edge material 32 is made by bending a thin lightweight steel plate by press working or the like, and is a rectangular tube material with a rectangular cross section consisting of left and right vertical surfaces 42, 42 and upper and lower horizontal surfaces 44, 45.
The hanger 34 is made of a steel plate, and includes a vertically long support plate part 46, a receiving part 48 having a U-shaped cross section at the lower part of the support plate part 46, and a connecting part 50 which is formed by bending the upper part of the support plate part 46 laterally. have.

In this ceiling base structure, a clip 30 is used to hold the edge material 32 on the base bar material 2.
A beam 52 is installed on the structural part of the ceiling, a connecting fitting 54 is attached to this beam 52, and a hanger 34 is fixed to the lower part of this connecting fitting 54. The lower end portion of the connecting fitting 54 is bent into an L shape, and this portion and the connecting portion 50 of the hanger 34 are fixed with a rivet 56.
A plurality of hangers 34 are attached along the beam material 52, and the base bar material 2 is held in the receiving portion 48 of each hanger 34.

The other base bar materials 2 are similarly arranged on the ceiling in parallel to each other.
Then, a field edge material 32 is installed under each base bar material 2 in a direction perpendicular thereto, and the field edge material 32 is supported by the base bar material 2 using clips 30.
In the clip 30, the field edge material 32 is placed on the placing part 35, and in this state, the upper part of the field edge material 32 is placed under the base bar material 2, and the locking part 40 of the clip 30, 40 is locked and fixed to the base bar material 2. The locking parts 40, 40 are respectively locked to the first upright plate part 6 of the base bar material 2 in a bent state.

At this time, as shown in FIG. 7, the base plate portion 4 of the base bar material 2 comes into contact with the receiving plate portions 38, 38 of the clip 30. The receiving plate portions 38, 38 are supported by side plate portions 39, 39 on the upper side that are perpendicular thereto, so that the side plate portions 39, 39 exhibit a rib-like function to reinforce the receiving plate 38. do. The side plate parts 39, 39 are also part of the side plate parts 36, 36.

Then, the base plate part 4 of the base bar material 2 is applied to the entire front ends 41, 41 of the side plate parts 39, 39 and the receiving plate parts 38, 38, and at the same time, the locking parts 40, 40 of the clip 30 are attached to the base bar material 2. The first upright plate portion 6 of the material 2 is locked. As a result, the substrate portion 4 of the base bar material 2 is held by the entirety of the side plate portions 39, 39, their front ends 41, 41, and the receiving plate portions 38, 38.
Therefore, the side plate parts 36 and 39 and the receiving plate part 38 of the clip 30 are effective in reinforcing the base plate part 4 of the base bar material 2.

Since the substrate portion 4 of the base bar material 2 is made of a thin, lightweight steel plate (single ply), its strength against external forces such as bending is correspondingly lower. 36, 39 and the receiving plate portion 38, high strength is maintained.
Further, the substrate portion 4 of the base bar material 2 and the receiving plate portion 38 of the clip 30 may be fixed with an adhesive or a fastener such as a screw or bolt. This further increases the reinforcing effect of the base bar material 2 on the substrate portion 4.

Therefore, according to the above-mentioned embodiment, the weight of the base bar material can be reduced, sufficient strength against bending, etc. can be ensured, and there is an effect that it is excellent in safety and economical efficiency. Furthermore, according to the ceiling base structure, since the side plate portion of the clip is formed in a direction perpendicular to the substrate portion of the base bar material, the side plate portion has a rib-like function with respect to the base bar material base portion. This has the effect of effectively reinforcing the thin plate-like substrate portion and increasing its strength.

2 Base bar material 4 Substrate part 6 First rising plate part 8 Second rising plate part 10, 12 Folding plate part 24, 26 Second folding plate part 32 Field edge material 35 Placement part 36 (39) Side plate Part 38 Receiving plate part 40 Locking part 41 Front end part

Claims (3)

As a foundation bar material used as the foundation material for buildings,
A thin, lightweight steel plate is bent and formed into a U-shaped cross section, consisting of a base plate, a first rising plate part bent at right angles from one side, and a second rising plate part bent at right angles from the other side. has
A base bar material is formed on the first and second rising plate portions by bending the ends of the steel plates inward and folding them back to form folded plate portions in which the steel plates overlap each other;
A ceiling base structure using
The base bar material is supported by a hanging fixture from the ceiling with the first upright plate part facing upward and the base plate part perpendicularly, and a field edge is placed at the bottom of the base bar material in a direction perpendicular to this. place the materials,
Using a clip, place the field edge material on the clip and hold the base bar material,
The clip has a side plate section that is perpendicular to the base bar material, and a receiving plate section that is integrally formed with the front end of the side plate section and has a plane parallel to the substrate section of the base bar material. ,
Applying the base plate part of the base bar material to the front end of the side plate part and the receiving plate part, and simultaneously locking the upper locking part of the clip to the first rising plate part of the base bar material, Holding the substrate part of the base bar material by the side plate part and the receiving plate part,
The above-mentioned clip consists of a flat placing part on which the above-mentioned field edge material is placed, the above-mentioned side plate part rising at right angles from the left and right ends of the above-mentioned placing part, and a part cut out from a part of the side plate part. The front end of the side plate part formed by bending the upper part of the side plate part at right angles, the receiving plate part formed integrally therewith and forming a plane parallel to the substrate part of the base bar material, and the receiving plate part A ceiling base structure characterized by having the above-mentioned locking part extending from the upper part of the ceiling base structure. 2. The ceiling base structure according to claim 1 , wherein the folded plate part is further extended to a part of the base plate part to form a second folded plate part in which the steel plates overlap each other. 3. The ceiling base structure according to claim 1 , wherein the substrate part is provided with a plurality of groove line parts having a V-shaped cross section or a honeycomb-shaped uneven part formed in the longitudinal direction.

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