Ceiling structure

Abstract

This ceiling structure provides a way to secure space above the horizontal members while increasing the rigidity and strength of the joint between the vertical and horizontal members. [Solution] The device comprises a vertical member 3, a horizontal member 4, and a joining member 5 that joins the side surface 321 of the lower end of the vertical member 3 and the side surface 431 of the end in the longitudinal direction of the horizontal member 4. The joining member 5 has a vertical member joining portion 51 that is joined to the side surface 321 of the vertical member 3, a horizontal member joining portion 52 that is joined to the side surface 431 of the horizontal member 4, and a connecting portion 53 that connects the vertical member joining portion 51 and the horizontal member joining portion 52.

Description

Technical Field

[0001] The present invention relates to a ceiling structure.

Background Art

[0002] In the design of a suspended ceiling for providing a steel-frame grape trellis or the like, it is necessary to design so as to support the installed equipment and ceiling materials, and also to design so as to be able to sufficiently resist the horizontal external force during an earthquake. For such loading conditions, cases of adopting a truss structure combining pin joints and braces or cases of adopting a ramen structure with increased fixing degree and strength of joints can be considered (for example, see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the case of a specification for accommodating equipment ducts or the like between the upper floor slab and the ceiling, when adopting a truss structure, there may be a case where the equipment cannot be installed due to the brace members. Therefore, by adopting a ramen structure, the space between the upper floor slab and the ceiling can be more freely utilized without requiring a brace surface, and it becomes easy to accommodate equipment ducts or the like. Also, when adopting a ramen structure, it is possible to flexibly respond to the addition of equipment due to future plan changes. On the other hand, when adopting a ramen structure, a bending moment acts on the joint between the vertical member and the horizontal member, so it is necessary to increase the rigidity and strength of the joint.

[0005] Therefore, an object of the present invention is to provide a ceiling structure that can increase the rigidity and strength of the joint between the vertical member and the horizontal member while securing the space above the horizontal member corresponding to the space between the upper floor slab and the ceiling. [Means for solving the problem]

[0006] To achieve the above objective, the ceiling structure according to the present invention comprises a vertical member, a horizontal member, and a joining member that joins the side surface of the lower end of the vertical member and the side surface of the end in the longitudinal direction of the horizontal member, wherein the joining member comprises a vertical member joining portion that is joined to the side surface of the vertical member, a horizontal member joining portion that is joined to the side surface of the horizontal member, and a connecting portion that connects the vertical member joining portion and the horizontal member joining portion.

[0007] In this invention, the side surface of the lower end of the vertical member and the side surface of the longitudinal end of the horizontal member are joined by a connecting member, thereby increasing the rigidity and strength of the joint between the vertical member and the horizontal member. Compared to the case where the connecting member is placed on top of the horizontal member, a larger space can be secured above the horizontal member, allowing for the installation of equipment and other items in this space.

[0008] In the ceiling structure according to the present invention, the connecting portion and at least one of the vertical member joint portion and the horizontal member joint portion are separate members, and the position at which they are joined to at least one of the vertical member joint portion and the horizontal member joint portion may be adjustable.

[0009] This configuration allows for easy connection of the vertical member joint, which is pre-attached to the vertical member, and the horizontal member joint, which is pre-attached to the horizontal member, at the connecting portion. Since the position at which the connecting portion is joined to at least one of the vertical member joint and the horizontal member joint can be adjusted, construction errors can be absorbed.

[0010] In the ceiling structure according to the present invention, the vertical member joint and the horizontal member joint are made of steel plates, and the connecting portion may be an angle material joined to the steel plate.

[0011] This configuration improves the strength of the connection points.

[0012] In the ceiling structure according to the present invention, the joining member is a steel plate, and the vertical member joining portion, the horizontal member joining portion, and the connecting portion may be integrally formed.

[0013] This configuration allows the connecting members to have a simple shape and provides ample space around them.

[0014] In the ceiling structure according to the present invention, an end plate with a surface area larger than the cross-sectional shape of the vertical member is joined to the lower end of the vertical member, and the horizontal member may be placed on the end plate and joined thereto.

[0015] With this configuration, when aligning the vertical and horizontal members, the horizontal member can be placed on the end plate, making it easy to align the vertical and horizontal members in a stable manner. [Effects of the Invention]

[0016] According to the present invention, it is possible to increase the rigidity and strength of the joint between the vertical member and the horizontal member while securing space above the horizontal member. [Brief explanation of the drawing]

[0017] [Figure 1] This is a front view of the ceiling structure according to the first embodiment. [Figure 2] This is a cross-sectional view along line AA in Figure 1. [Figure 3] This is a cross-sectional view along line BB in Figure 1. [Figure 4] This is a magnified section of Figure 1. [Figure 5] This is a front view of the ceiling structure according to the second embodiment. [Figure 6] This is a front view of a conventional ceiling structure. [Figure 7] This is the result of an experiment to confirm the load-bearing capacity of the joint. [Figure 8] This graph shows the load-deformation relationship of the ceiling structure according to the first embodiment in the experiment. [Figure 9]It is a graph showing the load deformation relationship of the ceiling structure according to the second embodiment in the experiment. [Figure 10] It is a graph showing the load deformation relationship of the conventional ceiling structure in the experiment.

Mode for Carrying Out the Invention

[0018] (First Embodiment) Hereinafter, the ceiling structure according to the embodiment of the present invention will be described based on FIGS. 1 to 4. As shown in FIG. 1, the ceiling structure 1 according to the present embodiment is a structure of a suspended ceiling 2 provided with a steel frame grape trellis. The ceiling structure 1 includes a vertical member 3, a horizontal member 4, and a joining member 5 that joins the vertical member 3 and the horizontal member 4. The vertical member 3 extends in the vertical direction and is a bundled material suspended from a structural material such as a steel frame beam. The horizontal member 4 extends in the horizontal direction and is joined to the lower end of the vertical member 3. A steel frame grape trellis is fixed to the horizontal member 4. The joining member 5 joins the vertical member 3 and the horizontal member 4. The horizontal direction in which the horizontal member 4 extends is denoted as the X direction, and the horizontal direction orthogonal to the X direction is denoted as the Y direction.

[0019] The vertical member 3 is, for example, a square steel pipe. The outer peripheral surface of the vertical member 3 faces the X direction and the Y direction. The surface of the outer peripheral surface of the vertical member 3 facing the Y direction is denoted as the side surface 321, and the surface facing the X direction is denoted as the side surface 322. An end plate 31 is joined to the lower end of the vertical member 3. The end plate 31 is a steel plate whose plate surface is larger than the cross-sectional shape of the vertical member 3. The end plate 31 is joined to the lower end of the vertical member 3 with the plate surface in a horizontal plane posture.

[0020] The horizontal member 4 is, for example, a square steel pipe. In this embodiment, the vertical member 3 and the horizontal member 4 are both square steel pipes with the same cross-section. The horizontal member 4 is positioned on both sides in the X direction of the lower end of the vertical member 3. The end face of the horizontal member 4 faces the side face 322 of the vertical member 3 that faces the X direction, with a gap between them. The end of the horizontal member 4 that is joined to the vertical member 3 is placed on the end plate 31. The horizontal member 4 is welded to the end plate 31. The lower surface of the horizontal member 4 is positioned at the same height as the lower end of the vertical member 3. The horizontal member 4 positioned on one side in the X direction of the vertical member 3 is sometimes referred to as the first horizontal member 41, and the horizontal member 4 positioned on the other side in the X direction of the vertical member 3 is sometimes referred to as the second horizontal member 42. Of the outer circumferential surfaces of the horizontal member 4, the surface facing the Y direction is referred to as the side face 431.

[0021] As shown in Figure 4, the joining member 5 has a horizontal member joining portion 52, a vertical member joining portion 51, and a connecting portion 53. The vertical member joining portion 51 is joined to the side surface 321 of the vertical member 3 facing the Y direction. The horizontal member joining portion 52 is joined to the side surface 431 of the horizontal member 4 facing the Y direction. The connecting portion 53 connects the vertical member joining portion 51 and the horizontal member joining portion 52. The horizontal member joining portion 52, the vertical member joining portion 51, and the connecting portion 53 are each separate members.

[0022] The vertical member joint 51 is a flat steel plate. The vertical member joint 51 is joined to the two sides 321, 321 of the vertical member 3, which face in the X direction, with the plate surface facing in the Y direction. The vertical member joint 51 has a joining plate portion 511 that overlaps with and is joined to the side 321 of the vertical member 3, a first protrusion portion 512 that is continuous with the joining plate portion 511 and protrudes from the vertical member 3 to one side in the X direction, and a second protrusion portion 513 that protrudes from the vertical member 3 to the other side in the X direction. The vertical member joint 51 is joined to the vertical member 3 at a position above the horizontal member 4.

[0023] The horizontal member joint 52 is a flat steel plate. The horizontal member joint 52 is joined to each of the two sides 431 of the horizontal member 4 that face the X direction, with the plate surface facing the Y direction. The horizontal member joint 52 has a joining plate portion 521 that overlaps and is joined to the two sides 431 of the horizontal member 4 that face the X direction, and a protruding portion 522 that protrudes upward from the horizontal member 4. The vertical member joint 51, which is joined to one side surface 321 in the Y direction of the vertical member 3, and the horizontal member joint 52, which is joined to one side surface 431 in the Y direction of the horizontal member 4, are arranged on the same vertical plane. The vertical member joint 51, which is joined to the other side surface 321 in the Y direction of the vertical member 3, and the horizontal member joint 52, which is joined to the other side surface 431 in the Y direction of the horizontal member 4, are arranged on the same vertical plane. The horizontal member joint 52 is positioned at a distance from the end of the horizontal member 4.

[0024] The connecting portion 53 is a steel angle material with an L-shaped cross-section. The connecting portion 53 is provided on both sides of the vertical member 3 in the X direction. The connecting portion 53 provided on one side of the vertical member 3 in the X direction extends in a direction that gradually moves from the top to the bottom and toward the other side in the X direction. The connecting portion 53 provided on one side of the vertical member 3 in the X direction connects the first protrusion 512 of the vertical member joint 51 joined to the vertical member 3 and the protrusion 522 of the horizontal member joint 52 joined to the first horizontal member 41. The connecting portion 53 provided on the other side of the vertical member 3 in the X direction extends in a direction that gradually moves from the top to the bottom and toward the other side in the X direction. The connecting portion 53 provided on the other side of the vertical member 3 in the X direction connects the second protruding portion 513 of the vertical member connecting portion 51 joined to the vertical member 3 and the protruding portion 522 of the horizontal member connecting portion 52 joined to the second horizontal member 42. The connecting portion 53 has one side 531 forming an L-shape in cross-section, which is joined to the first projection 512, second projection 513, and projection 522 of the vertical member connecting portion 51 with bolts 533, and the entire circumference is welded after being joined with bolts 533. At least one of the bolt holes in the connecting portion 53 and the bolt holes in the first projection 512, second projection 513, and projection 522 that are joined to the connecting portion 53 is a hole larger than the bolt diameter or an elongated hole. This allows for positional adjustment between the connecting portion 53 and the first projection 512, second projection 513, and projection 522 within the range of the dimensions of the hole larger than the bolt diameter or the elongated hole. The other side 532 forming the L-shape in cross-section of the connecting portion 53 protrudes in the Y direction from the first projection 512, second projection 513, and projection 522.

[0025] Next, the operation and effects of the ceiling structure according to this embodiment will be described. In the ceiling structure 1 according to this embodiment, the side surface 321 of the lower end of the vertical member 3 and the side surface 431 of the longitudinal end of the horizontal member 4 are joined by the joining member 5, thereby increasing the rigidity and strength of the joint 11 between the vertical member 3 and the horizontal member 4. Compared to the case where the joining member 5 is placed on top of the horizontal member 4, a wider space can be secured above the horizontal member 4, and equipment and the like can be installed in this space.

[0026] In the ceiling structure 1B according to this embodiment, the connecting portion 53, the vertical member joint portion 51, and the horizontal member joint portion 52 are separate components, and the position at which they are joined to the vertical member joint portion 51 and the horizontal member joint portion 52 can be adjusted. With this configuration, the vertical member joint portion 51, which is pre-joined to the vertical member 3, and the horizontal member joint portion 52, which is pre-joined to the horizontal member 4, can be easily connected by the connecting portion 53. By making it possible to adjust the position at which the connecting portion 53 is joined to the vertical member joint portion 51 and the horizontal member joint portion 52, construction errors can be absorbed.

[0027] In the ceiling structure 1 according to this embodiment, the vertical member joint 51 and the horizontal member joint 52 are made of steel plates, and the connecting portion 53 is an angle material joined to the steel plate. By adopting this configuration, the strength of the connecting portion 53 can be improved.

[0028] In the ceiling structure 1 according to this embodiment, an end plate 31 with a plate surface larger than the cross-sectional shape of the vertical member is joined to the lower end of the vertical member 3, and the horizontal member 4 is placed on the end plate 31 and joined thereto. With this configuration, when aligning the vertical member 3 and the horizontal member 4, the horizontal member 4 can be placed on the end plate 31, making it easy to align the vertical member 3 and the horizontal member 4 in a stable state.

[0029] (Second Embodiment) Next, a second embodiment will be described. The same reference numerals will be used for components and parts identical or similar to those in the first embodiment described above, and their descriptions will be omitted. Only configurations different from the second embodiment will be described. As shown in Figure 5, the ceiling structure 1B according to the second embodiment differs in the form of the joining member 6 from that of the joining member 5 in the first embodiment. The connecting member 6 is made of a single steel plate. The connecting member 6 is provided on both sides of the vertical member 3 and the horizontal member 4 in the Y direction. The joining member 6 has a vertical member joining portion 61, a horizontal member joining portion 62, and a connecting portion 63. The vertical member joining portion 61 is joined to the side surface 321 of the vertical member 3 facing the Y direction. The horizontal member joining portion 62 is joined to the side surface 431 of the horizontal member 4 facing the Y direction. The connecting portion 63 connects the vertical member joining portion 61 and the horizontal member joining portion 62. The horizontal member joining portion 62, the vertical member joining portion 61, and the connecting portion 63 are integrally formed steel plates. The vertical member joint 61 overlaps with the side surface 321 of the vertical member 3 and is joined to the side surface 321 of the vertical member 3. The horizontal member joint 62 overlaps with the side surface 431 of the horizontal member 4 and is joined to the side surface 431 of the horizontal member 4. The horizontal member joint 62 joined to the second horizontal member 42 on one side in the X direction is sometimes referred to as the first horizontal member joint 621, and the horizontal member joint 62 joined to the second horizontal member 42 on the other side in the X direction is sometimes referred to as the second horizontal member joint 622. The connecting portion 63 is positioned between the vertical member joint portion 61 and the horizontal member joint portion 62, and connects the vertical member joint portion 61 and the horizontal member joint portion 62. The vertical member joint 61 is joined to the side surface of the vertical member 3 above the upper surface of the horizontal member 4. The horizontal member joint 62 is joined to the end of the side surface of the horizontal member 4. The vertical member joint 61 is welded to the vertical member 3. The horizontal member joint 62 is welded to the horizontal member 4.

[0030] The ceiling structure 1B according to the second embodiment described above provides the same effects as the ceiling structure 1 according to the first embodiment. In the ceiling structure according to the second embodiment, the joining member 6 is a steel plate, and the vertical member joining portion 61, the horizontal member joining portion 62, and the connecting portion 63 are integrally formed, which allows the joining member 6 to have a simple shape and to secure a wide space around the joining member 6.

[0031] Experiments were conducted to verify the load-bearing capacity of the joints for each of the following: ceiling structure 1 according to the first embodiment, ceiling structure 1B according to the second embodiment, and the conventional ceiling structure 101 shown in Figure 6. In the conventional ceiling structure 101, the vertical member 3 and the horizontal member 4 are joined by bolts 72 via angle material 71, without providing the joining members 5 and 6 as in the above embodiments. Figure 7 shows the experimental results. In Figure 7, the ceiling structure 1 according to the first embodiment is labeled as high-strength type (1), the ceiling structure 1B according to the second embodiment is labeled as high-strength type (2), and the conventional ceiling structure 101 is labeled as standard type. Figure 8 shows a graph of the load-deformation relationship for the ceiling structure 1 according to the first embodiment. Figure 9 shows a graph of the load-deformation relationship for the ceiling structure 1B according to the second embodiment. Figure 10 shows a graph of the load-deformation relationship for the conventional ceiling structure 101.

[0032] As shown in Figures 7 to 10, the ceiling structure 1 according to the first embodiment and the ceiling structure 1B according to the second embodiment have higher maximum load-bearing capacity, yield strength, and elastic stiffness compared to the conventional ceiling structure 101 which does not have connecting members 5 and 6. This shows that sufficient strength and rigidity can be ensured by reinforcing the joint between the vertical member 3 and the horizontal member 4 with connecting members 5 and 6.

[0033] Although embodiments of the ceiling structure according to the present invention have been described above, the present invention is not limited to the above embodiments and can be modified as appropriate without departing from the spirit of the invention. For example, in the above embodiment, a steel trellis is provided on the horizontal member 4, but the above ceiling structure 1,1B may also be used on ceilings other than those where a steel trellis is provided. In the above embodiment, the end plate 31 is joined to the lower end of the vertical member 3, but it is not necessary for it to be joined. Rectangular steel pipes may be used for the vertical member 3 and the horizontal member 4.

[0034] The Sustainable Development Goals (SDGs) are among the 17 international goals adopted at the UN Summit in September 2015. The ceiling structure according to this embodiment can contribute to achieving goals such as "Goal 9: Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation," among the 17 Sustainable Development Goals (SDGs). [Explanation of Symbols]

[0035] 1,1B Ceiling structure 3. Vertical members 4 Horizontal members 5,6 Joining members 5. Joining members 6. Joining members 11 Joint 31 End Plate 51 Vertical member joint 52 Horizontal member joint 53 Connection part 61 Vertical member joint 62 Horizontal member joint 63 Connection part 321 Side view 431 Side view

Claims

1. Vertical member and Horizontal member and The system includes a joining member that connects the side surface of the lower end of the vertical member with the side surface of the longitudinal end of the horizontal member, The aforementioned joining member is A vertical member joint portion joined to the side surface of the aforementioned vertical member, A horizontal member joining portion joined to the side surface of the horizontal member, A ceiling structure having a connecting portion that connects the vertical member joint and the horizontal member joint.

2. The ceiling structure according to claim 1, wherein the connecting portion and at least one of the vertical member joint portion and the horizontal member joint portion are separate members, and the position at which they are joined to at least one of the vertical member joint portion and the horizontal member joint portion is adjustable.

3. The vertical member joint and the horizontal member joint are made of steel plate. The ceiling structure according to claim 1 or 2, wherein the connecting portion is an angle material joined to the steel plate.

4. The ceiling structure according to claim 1, wherein the joining member is a steel plate, and the vertical member joining portion, the horizontal member joining portion, and the connecting portion are integrally formed.

5. An end plate is attached to the lower end of the vertical member, the plate surface being larger than the cross-sectional shape of the vertical member. The ceiling structure according to claim 1 or 2, wherein the horizontal member is placed on and joined to the end plate.

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