Slab-like body support structure

Abstract

To provide a slab-like body support structure that can prevent a slab-like body from being pulled by a fixing member even if a displacement occurs in a positional relation between a slab-like body and the fixing member due to an earthquake or the like.SOLUTION: A slab-like body support structure comprises: a slab-like body 2 in which an upwardly inclined surface 21 that slopes upward from a lower surface side edge toward an upper surface side is formed, and which has a substantially trapezoidal longitudinal cross-section; a support body 3 which supports the slab-like body 2; and a tapered fixing member 4 in which a downwardly inclined surface 41 that slopes from an upper surface side edge toward a center of a lower surface is formed, which has a substantially inverted trapezoidal longitudinal cross-section, and to which a downward pressing force is applied by a fastening portion 5 provided in the support body 3 in a state where the fastening portion 5 is passed through a vertical hole 42 formed at the center side. When the downwardly inclined surface 41 comes into contact with the upwardly inclined surface 21 and the tapered fixing member 4 is applied with the downward pressing force by the fastening portion 5, the slab-like body 2 is pressed against an upper surface side of the support body 3 and is fixed.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] This invention relates to a plate-like body support structure for supporting a plate-like body such as a floor slab.

Background Art

[0002] Patent Document 1 discloses an ALC plate bolt fixing structure in which the back surface of an ALC plate, which is a plate-like body, is overlapped with the surface of a plate fixed to a steel frame, and a nut is screwed onto the tip of a bolt inserted from the ALC plate side into a through hole penetrating the plate and the ALC plate.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the bolt fixing structure described in Patent Document 1, since the bolt is passed through the through hole penetrating the plate-like body, as shown in FIG. 11, when the positional relationship between the bolt (fixing member) and the plate-like body is displaced due to an earthquake or the like, an event in which the plate-like body receives a compressive force from the bolt and an event in which the plate-like body is pulled by the bolt occur. And if the plate-like body is made of a brittle material, there is a risk that the plate-like body will be damaged by the above-mentioned pulling.

[0005] An object of this invention is to provide a plate-like body support structure that can avoid an event in which the plate-like body is pulled by the fixing member even when the positional relationship between the plate-like body and the fixing member is displaced due to an earthquake or the like.

Means for Solving the Problems

[0006] In order to solve the above problems, the plate-like body support structure of this invention A plate-like body having an upward inclined surface that slopes upward from the edge on the lower side to the upper side and having a substantially trapezoidal longitudinal cross-section portion, a support body that supports the plate-like body on the upper side, a downward inclined surface that slopes from the edge on the upper side toward the center side of the lower surface is formed and has a substantially inverted trapezoidal longitudinal cross-section portion, and the rod-shaped portion of the fastening portion provided on the support body is passed through the vertical hole portion formed on the center side, and a tapered fixing member to which a downward pressing force is applied by the fastening portion, The downward inclined surface of the tapered fixing member contacts the upward inclined surface of the plate-like body, and the tapered fixing member is applied with a downward pressing force by the fastening portion, so that the plate-like body is pressed against and fixed to the upper surface side of the support body.

[0007] With the above configuration, the inclined surfaces of the tapered fixing member and the plate-like body come into contact with each other, and the tapered fixing member is applied with a downward pressing force by the fastening portion, so that the plate-like body is pressed against and fixed to the upper surface side of the support body. Therefore, when a displacement occurs in the positional relationship between the tapered fixing member and the plate-like body due to an earthquake or the like, although the plate-like body receives a compressive force from the tapered fixing member, the plate-like body can be separated from the tapered fixing member, so that the plate-like body is pulled by the tapered fixing member. Such an event does not occur. That is, it is possible to eliminate the event that a tensile force acts on the plate-like body due to the restraint of the plate-like body by the hole portion and the bolt in the case where the plate-like body is fixed to the support body by bolts passed through the hole portions at the four corners of the conventional plate-like body.

[0008] The plate-like body may be a floor slab made of a brittle material. As described above, since the event that the plate-like body is pulled by the tapered fixing member does not occur, it is possible to prevent the floor slab made of the brittle material from being damaged.

[0009] The plate-like body has the upward inclined surface at the corner portion of the plate-like body, and the tapered fixing member is provided at a position where the corner portions of the plurality of plate-like bodies abut against each other, and a plurality of downward inclined surfaces in one tapered fixing member may be brought into contact with the upward inclined surfaces of the corner portions of the plurality of plate-like bodies. For example, plate-like bodies having the upward inclined surfaces at four corners in a square shape are arranged vertically and horizontally in a plurality, and one tapered fixing member may be arranged at a position where the four corners of the four plate-like bodies abut against each other.

[0010] The downward inclined surface and the upward inclined surface may be in surface contact or line contact.

[0011] The plate-like body may have a standing upper end surface on the lower end side of the upward inclined surface. According to this, it is possible to avoid the lower end side of the plate-like body from coming into contact with the fastening portion.

[0012] The support is a steel material having an upper flange, a lower flange, and a web connecting these flanges, and the tapered fixing member may be attached at a position avoiding the web of the upper flange. In such a configuration, a plate-like body having a width narrower than the width of the upper flange may be arranged on the upper flange.

[0013] The support is a steel material having an upper flange, a lower flange, and a web connecting these flanges, and the tapered fixing member may be attached at the position of the web in a plan view.

Effects of the Invention

[0014] According to the present invention, even if a displacement occurs in the positional relationship between the plate-like body and the fixing member due to an earthquake or the like, various effects such as avoiding the occurrence of an event in which the plate-like body is pulled by the fixing member can be achieved.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Mode for Carrying Out the Invention

[0016] Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. As shown in FIGS. 1, 2, 3, and 4, the plate-like body support structure 1 of the embodiment constitutes a floor structure in a building, and includes a plurality of plate-like bodies 2 arranged vertically and horizontally, a plurality of supports 3 that form the building frame, and a plurality of tapered fixing members 4.

[0017] Each plate-like body 2 has an upward inclined surface 21 that slopes upward from the edge on the lower surface side of the plate-like body 2 to the upper surface side, and has a substantially trapezoidal vertical cross-section portion. The plate-like body 2 of this embodiment is an ALC (autoclaved lightweight concrete) floor slab or a PCa (precast concrete) floor slab made of a brittle material such as concrete. Further, each plate-like body 2 forms a substantially right-angled quadrilateral in plan view, and each of the four corner portions of the plate-like body 2 has an upward inclined surface 21. Each upward inclined surface 21 is a planar inclined surface having a predetermined elevation angle (for example, 45 degrees) with respect to the lower surface. At the position where the corner portions of four adjacent plate-like bodies 2 abut against each other, an inverted regular square pyramid-shaped concave portion is formed by the four upward inclined surfaces 21. An upright upper end surface 21a is formed on the lower end side of the upward inclined surface 21, and contact between the lower end side of the plate-like body 2 and the fastening portion 5 is avoided.

[0018] The support 3 is an H-shaped steel beam having upper and lower flanges 31, 31 and webs 32 connecting them. The supports 3 are arranged parallel or perpendicular to each other at regular intervals at the location that becomes the floor portion, and the plate-like body 2 is supported by the upper flanges 31 of the adjacent supports 3 arranged in parallel.

[0019] The tapered fixing member 4 is composed of an inverted square pyramid frustum having four downward inclined surfaces 41 that slope from the edge on the upper surface side of the tapered fixing member 4 toward the center side of the lower surface, and having a substantially inverted trapezoidal vertical cross-section portion. Each downward inclined surface 41 is a planar inclined surface having the same inclination angle as the elevation angle of the upward inclined surface 21, and the angle formed between each two adjacent downward inclined surfaces 41 is 90 degrees. Note that chamfers are provided between each two adjacent downward inclined surfaces 41.

[0020] The tapered fixing member 4 is made of, for example, a casting, and has a vertical hole portion 42 through which a bolt can be inserted on the center side. As shown in FIG. 5, the tapered fixing member 4 passes the bolt 51 (rod-shaped portion) in the fastening portion 5 inserted from below the upper flange 31 of the support 3 through the vertical hole portion 42, and a downward pressing force is applied by a nut 52 screwed to the tip side of the bolt 51. Note that the fastening mode is not limited to this, and a through hole of the upper flange 31 may be formed, a nut may be welded to a position on the lower surface side of the flange aligned with this through hole, and a bolt passed through the vertical hole portion 42 from above may be screwed to the welded nut.

[0021] Then, the downward inclined surface 41 of the tapered fixing member 4 is in surface contact with the upward inclined surface 21 of the plate-like body 2, and the downward pressing force is applied to the tapered fixing member 4 by the nut 52 of the fastening portion 5. Thus, the plate-like body 2 is pressed and fixed to the upper surface side of the support 3 by the tapered fixing member 4. As shown in FIG. 1, the tapered fixing member 4 is attached to the fastening portion 5 arranged at a position avoiding the web 32 of the support 3.

[0022] Further, in this embodiment, as described above, each plate-like body 2 is substantially square in plan view, and each of the four corner portions of the plate-like body 2 has an upward inclined surface 21. The tapered fixing member 4 is provided at a position where the corner portions of four adjacent plate-like bodies 2 abut each other, and the four downward inclined surfaces 41 of one tapered fixing member 4 are in surface contact with the upward inclined surfaces 21 of the corner portions of the four plate-like bodies 2.

[0023] In the construction of the slab support structure 1, for example, the slab 2 is placed on the upper surface side of the support 3, and the tapered fixing member 4 is set at the position where the corner portions of four adjacent slabs 2 abut against each other. The bolts 51 of the fastening portion 5 are passed through each tapered fixing member 4, and nuts 52 are screwed onto these bolts 51 in a temporarily fixed state. When all the slabs 2 are arranged within a predetermined area and the temporary fixing of all the tapered fixing members 4 is completed, the final tightening of the fastening portion 5 is performed at each location, and the close contact between the upward inclined surface 21 and the downward inclined surface 41 is confirmed. Of course, it is not limited to the construction procedure described above.

[0024] With the above configuration, the inclined surfaces 41 and 21 of the tapered fixing member 4 and the slab 2 are in surface contact, and the tapered fixing member 4 is given a downward pressing force by the fastening portion 5, so that the slab 2 is pressed against and fixed to the upper surface side of the support 3. Therefore, as shown in FIG. 7, when a displacement occurs in the positional relationship between the tapered fixing member 4 and the slab 2 due to an earthquake or the like, although the slab 2 receives a compressive force from the tapered fixing member 4, the slab 2 can be separated from the tapered fixing member 4, so that the slab 2 is not pulled by the tapered fixing member 4. That is, it is possible to eliminate the phenomenon that a tensile force acts on the slab due to the restraint of the slab by the hole portion and the bolt in the case of fixing the slab to the support with bolts passed through the hole portions of the conventional slab.

[0025] Therefore, even if the slab 2 is a floor slab made of a brittle material, as described above, the slab 2 is not pulled by the tapered fixing member 4, so that damage to the floor slab made of the brittle material can be prevented.

[0026] Moreover, it becomes a dry floor structure, and the use of mortar or the like can be eliminated or the usage amount can be reduced. In addition, compared with the bolt holes formed in the floor slab in the conventional structure, the diameter of the vertical hole portion 42 of the tapered fixing member 4 can be made smaller, so that the slip width of the tapered fixing member 4 can be reduced.

[0027] Also, as shown in FIG. 5, when a downward pressing force is applied to the tapered fixing member 4 by the fastening portion 5 (bolt 51, nut 52) and the plate-like body 2 is pressed against the upper surface side of the support body 3, the fastening force of the fastening portion 5 is transmitted to the plate-like body 2, and a compressive force is generated in the plate-like body 2. When the compressive force is introduced into the plate-like body 2 in this way, an improvement in rigidity can be expected when the plate-like body 2 is deformed.

[0028] Also, as shown in FIG. 6, when an error occurs in the arrangement of the plate-like body 2, a shift will occur in the height position of the tapered fixing member 4. Due to such a shift in the height position, the tapered fixing member 4 can appropriately press the plate-like body 2 against the support body 3 side.

[0029] Note that on the outer wall side that forms the edge of the floor portion, in addition to the structure of filling the gap with the outer wall with glass wool, it is also possible to adopt a structure of filling the end of the floor portion with mortar. Also, as illustrated in FIG. 1, a plate-like body 2A for the outer wall side may be arranged. In the plate-like body 2A shown here, bolt insertion holes 25 may be formed in part, and the plate-like body 2A may be fixed on the upper flange 31 with bolts B passed through the bolt insertion holes 25.

[0030] Also, in the configuration example where the tapered fixing member 4 is attached avoiding the web 32 in a plan view as described above, as shown in FIGS. 8(A) and 8(B), a plate-like body 2B having a width narrower than the width of the flange 31 may be arranged on the upper flange 31. On the outer wall side that forms the edge of the floor portion, in addition to the structure of filling the gap with the outer wall with glass wool, it is also possible to adopt a structure of filling the end of the floor portion with mortar.

[0031] Further, the plate-like body support structure 1 is not limited to the configuration in which the tapered fixing member 4 is attached while avoiding the web 32 in a plan view, and the tapered fixing member 4 may be attached at the position of the web 32 in a plan view. For example, as shown in FIGS. 9(A) and 9(B), an additional member 6 such as an angle steel pipe member capable of positioning the fastening portion 5 above the web 32 is fixed to the upper flange 31 with bolts or the like. Alternatively, as shown in FIG. 10, a notch 32a is formed in the web 32, and the bolt 51 of the fastening portion 5 is passed through an insertion hole formed in the upper flange 31 above the notch 32a, and the tapered fixing member 4 may be attached to the bolt 51. Further, the bolt 51 of the fastening portion 5 may be welded onto the upper flange 31 on the upper side of the web 32.

[0032] Also, in the above example, the downward inclined surface 41 of the tapered fixing member 4 and the upward inclined surface 21 of the plate-like body 2 are in surface contact with each other in a plane, but the present invention is not limited thereto, and the downward inclined surface 41 of the tapered fixing member 4 and the upward inclined surface 21 of the plate-like body 2 may be in surface contact with each other as a convex curved surface and a concave curved surface. For example, the tapered fixing member 4 may be in the shape of an inverted frustum of a cone, the downward inclined surface 41 may be a convex curved surface, and the upward inclined surface 21 of the plate-like body 2 may be a concave curved surface into which the above curved surface fits. Further, the tapered fixing member 4 may be in the shape of an inverted frustum of a cone, the downward inclined surface 41 may be a convex curved surface, and the upward inclined surface 21 of the plate-like body 2 may be a plane, so that these inclined surfaces 41 and 21 are in line contact.

[0033] Also, in the above example, the tapered fixing member 4 is made of a casting, but it may be formed by three-dimensionally welding a plurality of plate members, or it may be formed by machining metal. Further, for example, it may be formed by providing concrete around a round steel pipe forming the vertical hole portion 42.

[0034] The embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope or an equivalent scope of the present invention.

Description of Reference Numerals

[0035] 1: Plate - like body support structure 2: Plate - like body 2A: Plate - like body 2B: Plate - like body 3: Support body 4: Taper fixing member 5: Fastening part 6: Additional member 21: Upward inclined surface 21a: Standing upper end surface 25: Bolt insertion hole 31: Flange 32: Web 32a: Notch 41: Downward inclined surface 42: Vertical hole part 51: Bolt 52: Nut B: Bolt insertion hole

Claims

1. A plate-like body having an upward inclined surface that slopes upward from the edge on the lower side to the upper side and having a substantially trapezoidal vertical cross-section portion, A support body that supports the plate-like body on the upper side, A downward inclined surface that slopes from the edge on the upper side toward the center side of the lower surface is formed and has a substantially inverted trapezoidal vertical cross-section portion, and the rod-shaped portion of the fastening portion provided on the support body is passed through a vertical hole portion formed on the center side, and a tapered fixing member to which a downward pressing force is applied by the fastening portion, and The downward inclined surface of the tapered fixing member contacts the upward inclined surface of the plate-like body, and the plate-like body is pressed and fixed to the upper surface side of the support body by the downward pressing force applied to the tapered fixing member by the fastening portion. A plate-like body support structure characterized by that.

2. The plate-like body support structure according to claim 1, wherein the plate-like body is a floor slab made of a brittle material.

3. The plate-like body support structure according to claim 1, wherein the plate-like body has the upward inclined surface at a corner portion of the plate-like body, and the tapered fixing member is provided at a position where the corner portions of the plurality of plate-like bodies abut against each other, and a plurality of downward inclined surfaces of one tapered fixing member are brought into contact with the upward inclined surfaces of the corner portions of the plurality of plate-like bodies. A plate-like body support structure characterized by that.

4. The plate-like body support structure according to claim 1, wherein the downward inclined surface and the upward inclined surface are in surface contact or line contact.

5. The plate-like body support structure according to claim 1, wherein the plate-like body has a standing upper end surface on the lower end side of the upward inclined surface.

6. The plate-like body support structure according to claim 1, wherein the support body is a steel material having an upper flange, a lower flange, and a web connecting these flanges, and the tapered fixing member is attached at a position avoiding the web of the upper flange. A plate-like body support structure characterized by that.

7. The plate-like body support structure according to claim 6, wherein the plate-like body having a width narrower than the width of the upper flange is disposed on the upper flange.

8. In the plate-shaped body support structure according to claim 1, the support is a steel material having an upper flange, a lower flange, and a web connecting these flanges, and the tapered fixing member is attached to the position of the web in a plan view. A plate-shaped body support structure characterized by this.

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