JP7602436B2 - Buried materials - Google Patents

Description

The present invention relates to a buried member that is buried and fixed to a mounting surface for purposes such as installing auxiliary equipment on the road surface.

Buried components such as anchor nuts that are fixed into burial holes using filler such as mortar or concrete that is filled in a fluid state and then solidifies have been used for some time, and various inventions related to this have been proposed.

For example, in Patent Document 1, the applicant has proposed an invention relating to an anchor nut having a female threaded portion that can be screwed onto the male threaded portion of an anchor bolt, the main body constituting the anchor nut is formed in a bottomed tubular shape with an opening at the top and a bottom wall portion that is closed at the bottom, 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 peripheral 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 the upper surface of the bottom wall portion.

JP 2010-261492 A

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 that is then allowed to solidify, the filler material enters the first and second recesses on the outer periphery 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 using a different configuration.

In order to achieve the above object, the present invention has the following configuration.
In other words, the embedded member of the present invention is an embedded member that is placed in an embedded hole formed in an installation surface and fixed in the embedded hole by a filling material that solidifies after filling the embedded hole, and is characterized in that 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 formed therein, a cylindrical outer wall portion provided 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 , and the main body portion is formed with a hole-shaped filling portion that is surrounded by the fastening portion, the outer wall portion, and the inner wall portion and penetrates in a direction along the axis of the female thread portion , and the filling portion is configured so that the filling material is filled inside the filling portion.

The embedding member according to the present invention has a main body with a fastening portion formed with a female thread, so that an item can be placed on a placement surface by screwing a male screw member into the fastening portion of the main body fixed in the embedding hole.

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

In addition, if the opening at the lower end is formed larger than the upper end in the cross-sectional shape of the filling part in the direction perpendicular to the axis of the fastening part, the cross-sectional area of the connection part between the filling material filled inside the filling part and the filling material filled outside the main body part, which connect at the opening, is made larger, making it less likely for the filling material to break and allowing the main body part to be fixed more firmly, which is preferable.

In addition, if an inclined or stepped wedge portion is provided on the inner surface of the filling portion and the filling material that contacts this wedge portion is arranged on the installation surface side relative to the wedge portion, the filling material in the filling portion and the wedge portion are engaged, and the main body portion is firmly fixed by the filling material, which is preferable.

In addition, if a cylindrical member formed separately from the main body portion is provided, and the cylindrical member is provided with a cylindrical portion that surrounds at least the upper portion of the main body portion and a connecting portion that connects the cylindrical portion to the main body portion, and the filler is filled between the inner surface of the cylindrical 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, the damage is prevented from reaching the outside by the cylindrical portion, and damage occurring on the outside of the burial hole can be suppressed, which is preferable.

With the buried member according to the present invention, the filler material filled inside the filling section provided in the main body and the filler material filled outside the main body are connected below the main body, so the main body can be firmly fixed in the burial hole.

1 is a perspective view showing one embodiment of a body portion of an embedded member according to the present invention; FIG. 2 is a front view of FIG. 1 . FIG. 2 is a plan view of FIG. 1 . FIG. 2 is a bottom view of FIG. 1 . This is a cross-sectional view taken along line AA in FIG. This is a cross-sectional view taken along line B-B of FIG. FIG. 2 is a vertical cross-sectional view showing a state in which the main body of FIG. 1 is embedded and fixed. 1 is a perspective view showing an embodiment of a cylindrical member of an embedding member according to the present invention; FIG. 9 is a front view of FIG. 8 . FIG. 9 is a plan view of FIG. 8 . This is a cross-sectional view taken along line AA in FIG. This is a cross-sectional view taken along line BB of Figure 10. FIG. 12 is an enlarged view of the vicinity of the broken portion in FIG. 11 . 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 . FIG. 15 is a vertical cross-sectional view showing a state in which the embedded member of FIG. 14 is embedded and fixed. FIG. 16 is a diagram showing a state in which an object is installed using the embedding member of FIG. 15 . FIG. 17 is an enlarged view of the embedded member and its surroundings in FIG. 16 . 18 is a diagram showing a state in which the embedded member in FIG. 17 has been pulled out from the installation surface. 18 is a diagram showing the state of the embedded member in FIG. 17 after it has been subjected to an external force.

The embodiment of the invention will be specifically explained with reference to the drawings.

Figure 1 shows one embodiment of the main body 2 of the buried member 1 according to the present invention, Figure 2 is a front view of Figure 1, Figure 3 is a plan view of Figure 1, Figure 4 is a bottom view of Figure 1, Figure 5 is a cross-sectional view taken along line A-A of Figure 3, and Figure 6 is a cross-sectional view taken along line B-B of Figure 3. In Figures 1 to 6, the explanation will be given assuming that the up-down direction in Figure 2, which shows the front view of the main body, is the vertical direction, and the left-right direction in the figure is the horizontal direction.

In the drawings, 1 is an embedded member, and 2 is a main body of the embedded member 1. The main body 2 has a generally circular upper and lower surface, and is formed into a generally truncated cone shape whose outer diameter increases vertically from top to bottom. A fastening portion 21 is formed in the center of the upper surface of the main body 2, and has a female threaded portion 22 that can fasten the male thread of a male threaded member such as a bolt, and the female threaded portion 22 is formed with its axial direction facing vertically. The main body 2 is formed from a metal casting, specifically, from aluminum die casting.

The main body 2 is formed with a filling section 23 that penetrates vertically. The filling sections 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 equally spaced locations in the circumferential direction so as to surround the female threaded section 22. A total of four filling sections 23 are formed in the main body 2. Each filling section 23 has a cross section perpendicular to the vertical direction that is approximately fan-shaped, and is arranged so that an approximately flat inner wall section 25 is formed between adjacent filling sections 23.

The inner surface 23c of each filling section 23, which is disposed radially outward, is formed into a shape that corresponds to the outer peripheral surface of the main body section 2. Specifically, the inner surface 23c of each filling section 23 is positioned slightly inward from the outer peripheral surface of the main body section 2, so that a substantially cylindrical outer wall section 26 is formed on the outer peripheral portion of the main body section 2.

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

As shown in FIG. 6, the inner surface 23a of each of the filling sections 23 that contacts the fastening section 21 is formed as an inclined surface that slopes radially outward from the main body section 2 as it extends vertically from top to bottom. In other words, the fastening section 21 is formed so that its outer shape becomes larger as it extends vertically from top to bottom. The inner surface 23a of each of the filling sections 23 that is formed as an inclined surface functions as a wedge section, which will be described later.

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

Each of the inner wall sections 25 is formed so that its thickness increases from top to bottom in the vertical direction. That is, each of the filling sections 23 is formed so that the inner surface 23b that contacts each of the inner wall sections 25 is slightly inclined with respect to the vertical direction. This inclined inner surface 23b of each of the filling sections 23 functions as a wedge section, which will be described later.

Figure 7 is a vertical cross-sectional view showing the state in which the main body 2 of Figure 1 is embedded and fixed. In Figure 7, the main body 2 is placed in an embedding hole H that is circular in plan view and drilled in the installation surface G, and is fixed with 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 positioned perpendicular to the installation surface G, and its upper surface is positioned approximately flush with the installation surface G.

The filler F is filled into the embedding hole H so that its upper surface is approximately flush with the installation surface G, and the filler F fills each filling section 23 of the main body 2 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 synthetic resin adhesive.

The main body 2 is formed in a generally truncated cone shape with an outer diameter that increases toward the bottom, 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 positioned vertically upward on the installation surface G side of the outer surface, and the outer surface and the filler F are engaged. By engaging the outer surface of the outer wall 26 with the filler F in this way, when the main body 2 is subjected to 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.

The body 2 has an inner surface 23a on the fastening portion 21 side of each filling portion 23 formed in an inclined surface that slopes radially outward from the body 2 as it moves vertically from top to bottom, thereby improving the strength of the fixation when embedded in the filling material F. Specifically, each inner surface 23a is arranged so that when the filling portion 23 is filled with the filling material F, the filling material F that contacts each inner surface 23a is arranged vertically upward on the installation surface G side relative to the inner surface 23a, and the inner surface 23a and the filling material F are engaged with each other. In this way, by providing each inner surface 23a as a wedge portion that engages with the filling material F, when the body 2 receives a force directed vertically upward, the resistance of the filling material F on each inner surface 23a increases, and the body 2 is prevented from coming off the installation surface G.

The inner wall portions 25 are formed so that their thickness increases from top to bottom in the vertical direction, and the inner side surfaces 23b, which are 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 that is filled in the filling portion 23 and contacts each inner side surface 23b is positioned vertically upward on the installation surface G side of each inner side surface 23b, so that when the main body portion 2 is subjected to a force directed vertically upward, the resistance of the filler F on each inner side surface 23b increases, and the main body portion 2 is prevented from coming off the installation surface G.

Figure 8 shows one embodiment of the cylindrical member 5 of the embedded member 1 according to the present invention, Figure 9 is a front view of Figure 8, Figure 10 is a plan view of Figure 8, Figure 11 is a cross-sectional view taken along line A-A of Figure 10, and Figure 12 is a cross-sectional view taken along line B-B of Figure 10.

The tubular member 5 shown in Figures 8 to 12 is integrally formed with a connection part 54 that is provided in a substantially disk shape and a tube part 51 that is extended downward from the entire circumference of the outer edge of the connection part 54 and is formed into a substantially cylindrical shape. Specifically, the connection part 54 and the tube part 51 are formed by pressing a single metal plate.

A circular through hole 55 is formed in the center of the connection part 54, penetrating in the vertical direction, and the through hole 55 is formed to a size that allows a male screw to be inserted through the through hole 55, which can be fastened to the female threaded part 22 of the main body part 2. In addition, a plurality of circular through holes 56 are formed in the connection part 54, penetrating in the vertical direction, and four of each through hole 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 are formed near the outer edge of the connection part 54, penetrating in the vertical direction, and four of each through hole 57 are arranged at equal intervals in the circumferential direction.

The connection portion 54 has a thin-walled break portion 58 formed therein that is thinner than the other portions of the connection portion 54, with a total of four break portions 58 formed between each of the through holes 57. Figure 13 is an enlarged view of the break portion 58 and its surroundings in Figure 11. The break portion 58 is a notch-shaped portion formed in the connection portion 54, with the upper and lower surfaces each formed as a groove recessed inward across the entire width of the connection portion 54 between the through holes 57. The break portion 58 is formed during the press working that integrally forms the tube portion 51 and the connection portion 54.

Figure 14 is a vertical cross-sectional view showing the state in which the tubular member 5 of Figure 8 is attached to the main body 2 of Figure 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 opening 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 positioned so as to surround the entire circumference of the upper portion of the main body 2.

Figure 15 is a vertical cross-sectional view showing the buried member 1 of Figure 14 in a buried and fixed state. The main body 2 and tubular member 5 of the buried member 1 shown in Figure 15 are placed in a circular buried hole H drilled in the installation surface G in a plan view, similar to the main body 2 shown in Figure 7, and are fixed with a filler F that is filled in the buried hole H and then solidified. The main body 2 is installed with the axis of the female thread portion 22 positioned perpendicular to the installation surface G, and the upper surface of the tubular member 5 is positioned approximately flush with the installation surface G.

The filling material F is filled into the burial hole H so that its upper surface is approximately flush with the installation surface G. Each filling section 23 of the main body 2 is connected to the outside of the burial hole H via each through hole 56 of the tubular member 5, so air is less likely to accumulate in each filling section 23 and the filling material F can be filled well up to the inside of each through hole 56. In addition, the tubular member 5 has the tube section 51 buried inside the filling material F, and the upper surface of the connection section 54 is exposed from the filling material F and fixed to the filling material F.

Figure 16 shows the state in which the object P is installed using the embedded member 1 of Figure 15, and Figure 17 shows an enlarged view of the embedded member 1 and its surroundings in Figure 16. The embedded member 1 in Figures 16 and 17 is drawn as a vertical cross section at an angle that allows the broken portion 58 of the cylindrical member 5 to be shown.

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

Figure 18 shows the state in which the embedded member 1 of Figure 17 has been pulled out from the installation surface G. When an external force is applied to the installation 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 Figure 18, the filler F filled in the embedding hole H starting from the main body part 2 of the embedded member 1 may crack into a cone shape and become detached, which is damage known as cone-shaped destruction. Figure 18 shows the state in which a tensile force is applied to the embedded member 1 that has been fixed in place, and the filler F that was fixing it becomes a cone-shaped lump with the lower end of the main body part 2 as its tip and becomes detached from the installation surface G.

When a cone-shaped break occurs as shown in FIG. 18, the filler F filled in the filling section 23 is broken so as to break at the position of the opening 23d at the lower end of the filling section 23. In the cross-sectional shape in the direction perpendicular to the axis of the fastening section, each filling section 23 of the embedding member 1 is formed so that the size of the opening 23d at the lower end is larger than that at the upper end. More specifically, the size of the cross-sectional shape of each filling section 23 is formed so that it is maximum at the opening 23d. By forming each filling section 23 as described above, it is made difficult for the filler F to break at the opening 23d, and the embedding member 1 is difficult to come off from the installation surface G, and is provided so that it can 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 part 2, each filling section 23 formed as described above can firmly fix the main body part 2 in the filler F.

When cone-shaped failure occurs, the failure surface D1 around the detached main body 2 tends to occur at a certain angle 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 typical concrete, the failure surface D1 occurs at an angle of 45 degrees to the installation surface. Also, in materials other than concrete, such as the constituent materials of the installation surface G and filler F used to install anchor nuts, etc., used to install roadside facilities such as fences and posts, the failure surface D1 occurs at an angle of approximately 50 degrees or less to the installation surface G.

As shown in FIG. 18, when the embedded member 1, which has the tubular portion 51 arranged to surround the upper periphery of the main body portion 2, is removed from the installation surface G, the fracture surface D1 is formed 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 components are pulled out as a single mass from the filler F on the outside of the tubular portion 51.

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

As shown in FIG. 18, the detachment of the embedded member 1 from the installation surface G occurs when the fracture surface D1, which originates from the lower end of the main body 2, connects to the lower end of the tube 51. For this reason, by setting 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 smaller than the angle between the fracture surface generated in the cone-shaped fracture and the installation surface G, 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, which originates from the lower end of the main body 2, is formed below the lower end of the tube 51 without connecting to the tube 51, and the fracture surface formed in the embedding hole H is easily made larger.

In order to make it easier to connect the fracture surface D1 to the tube portion 51, the embedded member 1 is preferably designed such that the angle An between the line connecting the lower edge of the main body portion 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 set to a value between 0 degrees and 50 degrees, and more preferably between 0 degrees and 45 degrees. In the embedded member 1 shown in FIG. 18, the angle An between the line connecting the lower edge of the main body portion 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.

The embedded member 1 shown in FIG. 18 has a smooth outer surface of the tubular portion 51 with few irregularities. By providing a smooth outer surface of the tubular portion 51 in this manner, the filler F adhering to this outer surface is easily peeled off, so that 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 less likely to spread outward from the outer surface of the tubular portion 51.

Figure 19 shows the state of the embedded member 1 in Figure 17 after it has been subjected to an external force. Figure 19 shows the 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.

Figure 19 shows a situation in which the embedded member 1, which has received force from the installed object P in Figure 17, has not yet been pulled out of the embedding hole H, but has instead moved so as to float slightly up within the filler material F. Specifically, the embedded member 1 shown in Figure 19 has the right-hand side of the main body 2 moved slightly vertically upward. When the main body 2 moves in this manner, the embedded member 1 may have the breaking portion 58 of the tubular member 5 broken due to the tensile force between the main body 2 moving upward and the tubular portion 51 embedded in the filler material F. Figure 19 shows a situation in which the breaking portion 58 located on the right side of the figure has broken.

As shown in FIG. 19, if the movement of the main body 2 is slight, damage such as cracks may not occur on the surface of the filler F that fixes the main body 2 in place, and even if damage occurs, it may only be a very small crack that is difficult to confirm visually. Even in situations where damage to the filler F is difficult to confirm, the embedded member 1 makes it possible to confirm whether the main body 2 has moved within the filler F by checking for breaks in the break sections 58 provided at the connection sections 54. In this way, by being able to easily check for movement of the main body 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.

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 spirit of the present invention.

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 inclined relative 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 is not limited to this.

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 inner surface, and the filler F that contacts this stepped portion may be placed on the installation surface G side relative to the stepped portion to be in an engaged state, thereby functioning as the wedge portion.

In addition, the embedded member 1 has the rupture portion 58 of the tubular member 5 formed in a thin wall shape by providing the connection portion 54 in a notch shape, but is not limited to this and may be formed in other shapes that can be broken at the rupture 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 rupture portion 58 may be formed in a narrow width by reducing the width of the connection portion 54, or the rupture portion 58 may be formed in a hole shape by providing the connection portion 54 in a notch shape.

Reference Signs List 1: Buried member 2: Main body 21: Fastening portion 22: Female thread portion 23: Filling portion 25: Inner wall portion 26: Outer wall portion 5: Cylindrical member 51: Cylindrical portion 54: Connection portion 55: Through hole 56: Through hole 57: Through hole 58: Fracture portion F: Filling material G: Installation surface H: Buried hole

Claims (4)

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.
The buried member according to claim 1, characterized in that the filling section is formed so that the opening at the lower end is larger than the opening at the upper end in a cross-sectional shape perpendicular to the axis of the fastening section. The buried member according to claim 1 or 2, characterized in that the filling section has an inclined or stepped wedge section on its inner surface, and the filling material in contact with the wedge section is disposed on the installation surface side relative to the wedge section. 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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