Buried materials

Abstract

To provide an embedded member that can be firmly embedded and fixed to an installation surface for the purposes such as installing incidental equipment on road surfaces.SOLUTION: An embedded member 1 which is arranged in an embedding hole H formed on an installation surface G and fixed in the embedding hole H by a filler F that solidifies after being filled in the embedding hole H has a body 2, the body part 2 has a fastening part 21 formed with a female thread portion 22, on the body part 2 a hole-shaped filling portion 23 is formed to penetrate in the direction along the axis of the female threaded portion 22 and is provided as such that the filler F is filled inside the filling portion 23.SELECTED DRAWING: Figure 15

Description

[Technical field]

[0001] The present invention relates to a buried member that is buried and fixed in an installation surface for use in, for example, installing incidental facilities on the road surface. [Background technology]

[0002] Buried members such as anchor nuts that are fixed in burial holes using filler such as mortar or concrete that is filled in a fluid state and then solidifies have been used in the past, and various inventions related to this have been proposed.

[0003] For example, Patent Document 1 discloses an invention proposed by the present applicant relating to an anchor nut having a female threaded portion capable of screwing together the male threaded portion of an anchor bolt, wherein a main body portion constituting the anchor nut is formed in a bottomed tubular shape having an opening at the top and a bottom that is blocked by a bottom wall portion, the female threaded portion is provided from the opening toward the bottom wall portion, a first recess and a second recess that are recessed inwardly are formed on the outer circumferential side surface of the main body portion, a groove portion that extends in the circumferential direction is formed between the first recess and the second recess formed below it, and the groove portion and the second recess are provided below an upper surface of the bottom wall portion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2010-261492 A Summary of the Invention [Problem to be solved by the invention]

[0005] The anchor nut shown in Patent Document 1 is designed so that when it is inserted into an embedding hole and filled with a filler material to be solidified and installed, the filler material enters the first recess and the second recess provided on the outer circumferential side surface of the main body, thereby more firmly fixing the main body. The present invention provides an embedding member that can be embedded and fixed more firmly by a different configuration. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention has the following configuration. That is, the embedding member according to the present invention is an embedding member that is placed in an embedding hole formed in an installation surface and fixed in the embedding hole by a filler that is filled in the embedding hole and then solidifies, the embedding member having a main body portion, the main body portion being 、 A fastening part with a female thread and an outer wall portion provided in a cylindrical shape on the outer periphery of the main body portion, and a plurality of inner wall portions that connect the fastening portion and the outer wall portion at a plurality of points. The main body portion has The fastening portion, the outer wall portion, and the inner wall portion are surrounded by the fastening portion. A hole-shaped filling portion is formed penetrating in a direction along the axis of the female screw portion. R, The filling portion is characterized in that the filling material is filled inside the filling portion.

[0007] According to the buried member of the present invention, a main body portion has a fastening portion formed with a female thread portion, so that an article can be placed on an installation surface by screwing a male thread member into the fastening portion of the main body portion fixed in the buried hole.

[0008] In addition, a hole-shaped filling portion that penetrates the main body portion is formed in a direction along the axis of the female threaded portion, and the filling material to be filled into the burial hole is filled inside this filling portion.Therefore, the filling material filled inside the filling portion and the filling material filled outside the main body portion are connected below the main body portion, and the main body portion can be firmly fixed within the burial hole.

[0009] Furthermore, if the cross-sectional shape of the filling part in a direction perpendicular to the axis of the fastening part is formed so that the opening at the lower end is larger than the upper end, the cross-sectional area of ​​the connection part between the filler filled inside the filling part and the filler filled outside the main body part that connect at the opening can be made larger, making it less likely for the filler to break and allowing the main body part to be fixed more firmly, which is preferable.

[0010] In addition, if an inclined or stepped wedge portion is provided on the inner surface of the filling portion and the filling material in contact with this wedge portion is positioned on the installation surface side relative to the wedge portion, the filling material in the filling portion and the wedge portion are engaged with each other, and the main body portion is firmly fixed by the filling material, which is preferable.

[0011] Furthermore, if a tubular member formed separately from the main body portion is provided, and this tubular member is equipped with a tubular portion surrounding at least the upper portion of the main body portion and a connecting portion connecting the tubular portion to the main body portion, and the filler is filled between the inner surface of the tubular portion and the outer surface of the main body portion, when an external force is transmitted to the main body portion via the fastening portion and the filler in the burial hole is damaged, this damage is prevented from reaching the outside by the tubular portion, and damage occurring outside the burial hole can be suppressed, which is preferable. Effect of the Invention

[0012] According to the buried member of the present invention, the filler material filled inside the filling section provided in the main body part and the filler material filled outside the main body part are connected below the main body part, so that the main body part can be firmly fixed within the burial hole. [Brief description of the drawings]

[0013] [Figure 1] 1 is a perspective view showing one embodiment of a body portion of an embedded member according to the present invention; [Diagram 2] FIG. 2 is a front view of FIG. [Diagram 3] FIG. 2 is a plan view of FIG. [Figure 4] FIG. 2 is a bottom view of FIG. [Diagram 5] 4 is a cross-sectional view taken along line AA in FIG. [Figure 6] BB cross-sectional view of FIG. 3. [Figure 7] 2 is a vertical cross-sectional view showing a state in which the main body of FIG. 1 is embedded and fixed. FIG. [Figure 8] 1 is a perspective view showing an embodiment of a cylindrical member of an embedding member according to the present invention; [Figure 9] FIG. 9 is a front view of FIG. 8. [Figure 10] FIG. 9 is a plan view of FIG. 8. [Figure 11] 11 is a cross-sectional view taken along the line AA in FIG. [Figure 12] 11 is a cross-sectional view of FIG. 10 taken along line B-B. [Figure 13] FIG. 12 is an enlarged view of the vicinity of the broken portion in FIG. [Figure 14] 9 is a vertical cross-sectional view showing a state in which the cylindrical member of FIG. 8 is attached to the main body of FIG. 1. [Figure 15] 15 is a vertical cross-sectional view showing a state in which the embedded member of FIG. 14 is embedded and fixed. FIG. [Figure 16] 16 is a diagram showing a state in which an installation object is installed using the embedding member of FIG. 15. FIG. [Figure 17] FIG. 17 is an enlarged view of the embedded member and its surroundings in FIG. 16. [Figure 18] 18 is a diagram showing a state in which the embedded member in FIG. 17 has been pulled out from the installation surface. [Figure 19] 18 is a diagram showing a state after the embedded member in FIG. 17 is subjected to an external force. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The embodiment of the invention will be specifically described with reference to the drawings.

[0015] Fig. 1 is a diagram showing one embodiment of a main body 2 of an embedded member 1 according to the present invention, Fig. 2 is a front view of Fig. 1, Fig. 3 is a plan view of Fig. 1, Fig. 4 is a bottom view of Fig. 1, Fig. 5 is a cross-sectional view taken along line AA in Fig. 3, and Fig. 6 is a cross-sectional view taken along line BB in Fig. 3. In Figs. 1 to 6, the explanation will be given assuming that the up-down direction in Fig. 2 showing the front view of the main body is the vertical direction, and the left-right direction in the figure is the horizontal direction.

[0016] In the drawings, 1 is an embedded member, and 2 is a main body of the embedded member 1. The main body 2 has an approximately circular upper and lower surface, and is formed into an approximately truncated cone shape whose outer diameter increases from the top to the bottom in the vertical direction. A fastening portion 21 having a female threaded portion 22 capable of fastening a male thread of a male threaded member such as a bolt is formed in the center of the upper surface of the main body 2, and the axial direction of the female threaded portion 22 is formed in the vertical direction. The main body 2 is formed of a metal casting, specifically, aluminum die casting.

[0017] The main body 2 is formed with a filling portion 23 that penetrates in the vertical direction. The filling portions 23 are formed as through holes with openings 23e and 23d on the upper and lower surfaces of the main body 2, respectively, and are arranged in a plurality of equal intervals in the circumferential direction so as to surround the female threaded portion 22. A total of four filling portions 23 are formed in the main body 2. Each filling portion 23 has a cross section perpendicular to the vertical direction that is approximately fan-shaped, and is provided so that an approximately flat inner wall portion 25 is formed between adjacent filling portions 23.

[0018] The inner surface 23c arranged radially outward in each of the filling portions 23 is formed into a shape corresponding to the outer circumferential surface of the main body portion 2. Specifically, the inner surface 23c of each filling portion 23 is positioned slightly inward from the outer circumferential surface of the main body portion 2, and is provided so that a substantially cylindrical outer wall portion 26 is formed on the outer circumferential portion of the main body portion 2.

[0019] The main body 2 is formed in a shape in which the fastening portion 21 having the female thread portion 22 and the outer wall portion 26 are connected by the inner wall portions 25 .

[0020] As shown in Fig. 6, each of the filling portions 23 has an inner surface 23a in contact with the fastening portion 21 formed in an inclined surface shape that slopes radially outward from the main body portion 2 as it extends vertically from the top to the bottom. In other words, the fastening portion 21 is formed so that the outer shape becomes larger as it extends vertically from the top to the bottom. The inner surface 23a of each of the filling portions 23 formed in an inclined surface shape functions as a wedge portion, which will be described later.

[0021] In addition, the inner surface 23c of each of the filling portions 23 on the outer wall portion 26 side is formed as an inclined surface that is radially outward from the top to the bottom in the vertical direction, and the degree of inclination of the inner surface 23c with respect to the axial direction of the female thread portion 22 is set to be larger than that of the inner surface 23a. That is, the radial distance between the inner surface 23a and the inner surface 23c becomes larger from the top to the bottom in the vertical direction, and is maximum at the lower opening 23d of each filling portion 23. In other words, the filling portion 23 is formed such that the opening 23d at the lower end is larger than the upper opening in a cross-sectional shape perpendicular to the vertical direction, which is the axial direction of the fastening portion, and the size of the opening 23d is maximum.

[0022] Each of the inner wall portions 25 is formed so that its plate thickness increases from the top to the bottom in the vertical direction. That is, each of the filling portions 23 is formed so that the inner surface 23b in contact with each of the inner wall portions 25 is slightly inclined with respect to the vertical direction. The inner surface 23b of each of the filling portions 23 provided in this inclined shape functions as a wedge portion, which will be described later.

[0023] Fig. 7 is a vertical cross-sectional view showing the state in which the main body 2 of Fig. 1 is embedded and fixed. In Fig. 7, the main body 2 is placed in an embedding hole H that is circular in plan view and drilled in an installation surface G, and is fixed by a filler F that is filled into the embedding hole H and then solidified. The main body 2 is installed with the axis of the female thread portion 22 oriented perpendicular to the installation surface G, and its upper surface is disposed approximately flush with the installation surface G.

[0024] The filler F is filled in the embedding hole H so that its upper surface is substantially flush with the installation surface G, and the filler F in each filling section 23 of the main body 2 fills from the lower opening 23d to the upper opening 23e. The filler F that fixes the embedded member 1 can be selected or combined from various materials that harden from a flowable state, such as mortar, cement, or a synthetic resin adhesive.

[0025] The main body 2 is formed in a generally truncated cone shape with an outer diameter that increases toward the bottom, thereby improving the strength of the fixation when embedded in the filler F. Specifically, by forming the outer surface of the outer wall 26 into an inclined surface, the filler F that fills the embedding hole H and contacts the outer surface is disposed vertically upward on the installation surface G side with respect to the outer surface, and the outer surface and the filler F are engaged with each other. By engaging the outer surface of the outer wall 26 with the filler F in this manner, when the main body 2 receives a force directed vertically upward, the resistance of the filler F in the outer wall 26 increases, and the main body 2 is prevented from coming off the installation surface G.

[0026] The body 2 has an inner surface 23a on the fastening portion 21 side of each filling portion 23 formed in an inclined surface shape that faces the radially outer side of the body 2 from the top to the bottom in the vertical direction, thereby improving the fixing strength when embedded in the filler F. Specifically, each inner surface 23a is provided so that, when the filling portion 23 is filled with the filler F, the filler F in contact with each inner surface 23a is disposed vertically upward on the installation surface G side relative to the inner surface 23a, and the inner surface 23a and the filler F are engaged with each other. In this way, by providing each inner surface 23a as a wedge portion that engages with the filler F, when the body 2 receives a force directed vertically upward, the resistance of the filler F on each inner surface 23a increases, and the body 2 is prevented from coming off from the installation surface G.

[0027] Moreover, the inner wall portions 25 are formed so that their plate thickness increases from the top to the bottom in the vertical direction, and the inner side surfaces 23b formed to be slightly inclined with respect to the vertical direction function as wedge portions that engage with the filler F filled in the filling portion 23. That is, the filler F filled in the filling portion 23 and in contact with each inner side surface 23b is disposed vertically upward on the installation surface G side of each inner side surface 23b, so that when the main body portion 2 receives a force directed vertically upward, the resistance of the filler F on each inner side surface 23b increases, and detachment of the main body portion 2 from the installation surface G is suppressed.

[0028] FIG. 8 is a diagram showing one embodiment of a tubular member 5 of an embedded member 1 according to the present invention, FIG. 9 is a front view of FIG. 8, FIG. 10 is a plan view of FIG. 8, FIG. 11 is a cross-sectional view taken along line AA of FIG. 10, and FIG. 12 is a cross-sectional view taken along line BB of FIG. 10.

[0029] The tubular member 5 shown in Figures 8 to 12 is integrally formed with a connecting portion 54 having a substantially circular plate shape and a tubular portion 51 extending downward from the entire outer edge of the connecting portion 54 and having a substantially cylindrical shape; specifically, the connecting portion 54 and the tubular portion 51 are formed by pressing a single metal plate.

[0030] A circular through hole 55 penetrating in the vertical direction is formed in the center of the connection portion 54, and the through hole 55 is formed to a size that allows a male screw that can be fastened to the female threaded portion 22 of the main body portion 2 to be inserted therethrough. The connection portion 54 also has a plurality of circular through holes 56 penetrating in the vertical direction, and four of the through holes 56 are arranged at equal intervals in the circumferential direction so as to surround the through hole 55. A plurality of approximately fan-shaped through holes 57 penetrating in the vertical direction are formed near the outer edge of the connection portion 54, and four of the through holes 57 are arranged at equal intervals in the circumferential direction.

[0031] The connecting portion 54 is formed with thin-walled breakage portions 58 that are thinner than other portions of the connecting portion 54, and a total of four breakage portions 58 are formed, one between each of the through holes 57. Fig. 13 is an enlarged view of the vicinity of the breakage portion 58 in Fig. 11. The breakage portions 58 are notched portions provided in the connecting portion 54, and are formed in groove shapes with the upper and lower surfaces recessed inward across the entire width of the connecting portion 54 between each of the through holes 57. The breakage portions 58 are formed during the press working that integrally forms the tubular portion 51 and the connecting portion 54.

[0032] Fig. 14 is a vertical cross-sectional view showing the state in which the tubular member 5 of Fig. 8 is attached to the main body 2 of Fig. 1. The tubular member 5 is attached to the main body 2 by aligning the positions of the through holes 55 and the female threaded portion 22, positioning each through hole 56 directly above the openings 23e of each filling portion 23, and abutting the lower surface of the connection portion 54 against the upper surface of the main body 2. The tube portion 51 of the tubular member 5 is arranged so as to surround the entire circumference of the upper portion of the main body 2.

[0033] Fig. 15 is a vertical cross-sectional view showing the embedded member 1 of Fig. 14 in a buried and fixed state. The body 2 and tubular member 5 of the embedded member 1 shown in Fig. 15 are disposed in an embedding hole H, which is circular in plan view and drilled in an installation surface G, similar to the body 2 shown in Fig. 7, and are fixed by a filler F that is filled in the embedding hole H and then solidified. The body 2 is disposed with the axis of the female thread portion 22 disposed perpendicular to the installation surface G, and the upper surface of the tubular member 5 is disposed approximately flush with the installation surface G.

[0034] The filler F is filled in the embedding hole H so that its upper surface is approximately flush with the installation surface G. Since each filling portion 23 of the main body 2 communicates with the outside of the embedding hole H via each through hole 56 of the tubular member 5, air is less likely to accumulate in each filling portion 23, and the filler F can be satisfactorily filled up to the inside of each through hole 56. In addition, the tubular member 5 has the tube portion 51 embedded inside the filler F, and the upper surface of the connection portion 54 is exposed from the filler F and fixed to the filler F.

[0035] Fig. 16 is a diagram showing a state in which an object P is installed using the embedded member 1 of Fig. 15, and Fig. 17 is an enlarged view of the vicinity of the embedded member 1 of Fig. 16. The embedded member 1 in Figs. 16 and 17 is drawn as a vertical cross section at an angle that allows the broken portion 58 of the tubular member 5 to be illustrated.

[0036] The installed object P shown in Figures 16 and 17 is a so-called sign post that is installed on or near a road, and has a male screw B that protrudes downward integrally formed in the lower base. The installed object P is erected on an installation surface G by screwing this male screw B into a female screw portion 22 of an embedded member 1 that is embedded and fixed in a filling material F. Figures 16 and 17 and Figure 18, which will be described later, are partial cross-sectional views of the installed object P below the base portion.

[0037] Fig. 18 is a diagram showing a state in which the embedded member 1 of Fig. 17 has been pulled out from the installation surface G. When an external force is applied to the installed object P and a strong force is applied to the embedded member 1 via the male screw B so as to pull it out of the installation surface G, as shown in Fig. 18, the filler F filled in the embedding hole H starting from the main body 2 of the embedded member 1 may crack in a cone shape and become detached, which is damage called a cone-shaped fracture. Fig. 18 shows a state in which a tensile force is applied to the embedded member 1 fixed in place, and the filler F that fixed it becomes a cone-shaped lump with the lower end of the main body 2 as its tip and becomes detached from the installation surface G.

[0038] When a cone-shaped breakage occurs as shown in FIG. 18, the filler F filled in the filling portion 23 is broken so as to break at the position of the opening 23d at the lower end of the filling portion 23. In each filling portion 23 of the embedding member 1, the size of the opening 23d at the lower end is formed larger than that at the upper end in a cross-sectional shape in a direction perpendicular to the axis of the fastening portion. More specifically, the size of the cross-sectional shape of each filling portion 23 is formed to be maximum at the opening 23d. By forming each filling portion 23 as described above, breakage of the filler F at the opening 23d is made difficult to occur, and the embedding member 1 is made difficult to come off from the installation surface G, and is provided so as to be embedded and fixed more firmly. For example, even if the depth of the embedding hole H is shallow and the bottom of the embedding hole H is located near the lower surface of the main body portion 2, each filling portion 23 formed as described above can firmly fix the main body portion 2 in the filler F.

[0039] When cone-shaped failure occurs, the failure surface D1 around the detached main body 2 tends to occur at a certain angle with respect to the installation surface G. The angle varies depending on the constituent members of the installation surface G and the material of the filler F, but in general concrete, the failure surface D1 occurs at an angle of 45 degrees with respect to the installation surface. Also, in materials other than concrete, such as the constituent materials of the installation surface G on which anchor nuts, etc., used for installing roadside facilities such as fences and posts, and the filler F, the failure surface D1 occurs at an angle of approximately 50 degrees or less with respect to the installation surface G.

[0040] 18, when the embedded member 1 having the tubular portion 51 disposed so as to surround the upper periphery of the main body portion 2 is removed from the installation surface G, the fracture surface D1 is formed so as to connect the lower end of the main body portion 2 to the lower end of the tubular portion 51. In other words, the embedded member 1 shown in FIG. 18 is removed such that the tubular portion 51 of the tubular member 5, the main body portion 2, and the filler F filled between the two members are pulled out as a single mass from the filler F outside the tubular portion 51.

[0041] By creating such a fracture surface D1, even if the embedded member 1 having the tubular portion 51 is subjected to a strong external force that causes it to come off from the installation surface G, damage to the filler F on the outside of the tubular portion 51 and to the members constituting the installation surface G outside the embedding hole H can be suppressed.

[0042] As shown in Fig. 18, the detachment of the embedded member 1 from the installation surface G occurs when the fracture surface D1 generated from the lower end of the main body 2 is connected to the lower end of the tube 51. For this reason, the angle An between the line connecting the edge of the lower end of the main body 2 to the lower end of the tube 51 and the installation surface G is set smaller than the angle between the fracture surface generated in the cone-shaped fracture and the installation surface G, so that the fracture surface D1 is easily connected to the tube 51. If the angle An is set larger than the angle between the fracture surface generated in the cone-shaped fracture and the installation surface G, the fracture surface D1 generated from the lower end of the main body 2 is formed below the lower end of the tube 51 without being connected to the tube 51, and the fracture surface formed in the embedding hole H is easily made larger.

[0043] In order to facilitate connection of the fracture surface D1 to the tube portion 51, the embedded member 1 is preferably configured such that the angle An between the line connecting the edge of the lower end of the main body 2 to the lower end of the tube portion 51 and the perpendicular plane to the axis of the female thread portion 22 of the fastening portion 21, which is likely to be arranged parallel to the installation surface G, is 0 degrees or more and 50 degrees or less, and more preferably 0 degrees or more and 45 degrees or less. In the embedded member 1 shown in Fig. 18, the angle An between the line connecting the edge of the lower end of the main body 2 to the lower end of the tube portion 51 and the perpendicular plane to the axis of the female thread portion 22 is formed to be approximately 40 degrees.

[0044] The embedded member 1 shown in Fig. 18 has an outer surface of the tubular portion 51 formed to be a smooth surface with few irregularities. By providing the outer surface of the tubular portion 51 with a smooth surface in this manner, the filler F attached to this outer surface is easily peeled off, and therefore, when the embedded member 1 is removed from the installation surface G, as shown in Fig. 18, the fracture surface D1 generated in the filler F is unlikely to spread outward from the outer surface of the tubular portion 51.

[0045] Fig. 19 is a diagram showing a state after the embedded member 1 of Fig. 17 has been subjected to an external force. Fig. 19 shows a state in which the male screw B has been unscrewed from the female screw portion 22 of the embedded member 1, and the installed object P has been removed.

[0046] Fig. 19 illustrates a state in which the embedded member 1, which has received a force from the installed object P in Fig. 17, has not yet been pulled out of the embedding hole H, but has instead moved so as to float slightly up in the filling material F. Specifically, in the embedded member 1 illustrated in Fig. 19, the right-hand portion of the main body 2 has moved slightly upward in the vertical direction. When the main body 2 has moved in this manner, the embedded member 1 may have the breaking portion 58 of the tubular member 5 broken by the tensile force between the main body 2 moving upward and the tubular portion 51 embedded in the filling material F. Fig. 19 illustrates a state in which the breaking portion 58 located on the right-hand side of the figure has broken.

[0047] As shown in Fig. 19, when the movement of the main body part 2 is slight, damage such as cracks may not occur on the surface of the filler F that fixes the main body part 2 in an embedded state, and even if damage occurs, it may be only a very small crack and difficult to confirm visually. Even in a situation where damage to the filler F is difficult to confirm, the embedded member 1 makes it possible to confirm the presence or absence of movement of the main body part 2 within the filler F by checking the presence or absence of breakage of each breakage part 58 provided in the connection part 54. In this way, by being able to easily check the presence or absence of movement of the main body part 2, it becomes easier to determine the need to replace the embedded member 1 when the installed object P is subjected to an external force.

[0048] The embedded member 1 according to the present invention is not limited to the above embodiment, and various modifications are possible without departing from the gist of the present invention.

[0049] For example, the embedded member 1 is configured so that the inner surface 23a and the inner surface 23b of the filling portion 23 of the main body portion 2 are formed as inclined surfaces that are inclined with respect to the axial direction of the female thread portion 22, thereby functioning as a wedge portion that more firmly fixes the main body portion 2 within the filling material F, but this is not limited to this.

[0050] For example, instead of forming the inner surface 23a and the inner surface 23b as an inclined surface, a stepped portion may be provided on a part of the surface, and the filler F in contact with this stepped portion may be positioned on the installation surface G side relative to the stepped portion to engage with the stepped portion, thereby functioning as the wedge portion.

[0051] In addition, in the embedded member 1, the breaking portion 58 of the cylindrical member 5 is formed to be thin-walled by providing the connection portion 54 in a notch shape, but the present invention is not limited to this and may be formed in another shape that can break at the breaking portion 58 when an external force is applied. For example, the connection portion 54 between adjacent through holes 57 may be provided in a notch shape, and the breaking portion 58 may be formed in a narrow shape with a small width, or the breaking portion 58 may be formed in a hole shape with the connection portion 54 provided in a notch shape. [Explanation of symbols]

[0052] 1 Buried materials 2 Main unit 21 Fastening Part 22 Female thread 23 Filling section 25 Inner wall 26 Exterior wall 5. Cylindrical member 51 Cylinder part 54 Connection 55 Through hole 56 Through hole 57 Through hole 58 Fracture F Filling material G Installation surface H Buried hole

Claims

1. A buried member that is placed in a buried hole formed in an installation surface and is fixed in the buried hole by a filler that is filled in the buried hole and then solidifies, The embedded member has a main body portion, and the main body portion is integrally formed from a fastening portion having a female thread portion, an outer wall portion provided in a cylindrical shape on the outer periphery of the main body portion, and a plurality of inner wall portions connecting the fastening portion and the outer wall portion at a plurality of points, An embedded member characterized in that a hole-shaped filling portion is formed in the main body portion, surrounded by the fastening portion, the outer wall portion, and the inner wall portion, and penetrating in a direction along the axis of the female threaded portion, and the filling material is filled inside the filling portion.

2. 2. The buried member according to claim 1, wherein the filling portion is formed so that, in a cross-sectional shape taken in a direction perpendicular to the axis of the fastening portion, the opening at the lower end is larger than the opening at the upper end.

3. The buried member described in claim 1 or 2, characterized in that the filling portion has an inclined or stepped wedge portion on its inner surface, and the filling material in contact with the wedge portion is arranged so as to be positioned on the installation surface side of the wedge portion.

4. a cylindrical member formed separately from the main body portion, the cylindrical member including a cylindrical portion surrounding at least an upper portion of the main body portion and a connecting portion connecting the cylindrical portion and the main body portion; 4. The embedding member according to claim 1, wherein the filler is provided so as to fill a gap between an inner surface of the cylindrical portion and an outer surface of the main body.

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