JP6431007B2 - Pegs and underground structures - Google Patents

Description

  The present invention relates to a peg and an underground structure for fixing a fixed object such as an air play equipment and a soccer goal on the ground surface.

  Patent Document 1 describes an example of a conventional peg. This peg is configured as a stay anchor for stretching a stay of an aerial pillar for a portable radio device, and includes a pile body and a spiral portion provided in the pile body. On the outer periphery of the upper end portion of the pile body, a ring provided with a stay through hole is rotatably arranged. A head is provided in a portion located above the ring in the pile body, and a hole is provided in a portion located below the ring in the pile body. When embedding a pile body in the ground, the pile body is driven into the ground by hitting the head with a hammer or the like. When the pile body is pulled out from the ground, the turning rod is inserted into the hole, and the pile body is rotated together with the turning rod, so that the pile body is pulled out from the ground by the propulsion action of the spiral portion.

Utility Model Application Publication No. 29-4434

  In the stay anchor described in Patent Document 1, when driving the pile body into the ground, care must be taken so that the position of the hole does not fall below the ground surface, while checking the position of the hole. The work of driving the body was troublesome. Also, when pulling out the pile body from the ground, the turning rod must be inserted into the hole and rotated, and when obstacles such as undulations and weeds are present on the ground surface, the operation of rotating the turning rod is necessary. It was difficult.

  The present invention has been made to cope with the above problems, and provides a peg and an underground structure that can improve workability when the shaft portion is embedded in the ground or removed from the ground. Objective.

In order to achieve the above object, the peg according to the present invention is characterized by a peg for fixing a fixed object on the ground surface, a rod-shaped shaft portion embedded in the ground, and a spiral shape on the shaft portion. An excavation blade provided; an input portion provided at an upper portion of the shaft portion, to which a rotational force for rotating the shaft portion in a circumferential direction is input; a coupling portion coupled to the fixed object; A coupling base provided on an upper portion of the shaft portion, to which the coupling portion is detachably mounted, and the coupling portion has a diameter smaller than that of the support portion at a lower end portion of a cylindrical support portion on which a male screw is formed. A main body portion having a male screw portion that is formed and detachably screwed onto the coupling base portion, and a first annular portion through which the support portion of the main body portion penetrates, with respect to the support portion A rotating member that is pivotably attached to which the fixed object is coupled, and a front In that and a first nut and second nut securing across screwed to the pivot member from both sides of the pivot member relative to the support portion of the main body.

  In this configuration, the shaft portion and the excavation blade are rotated in the positive direction by the positive rotational force input from the input unit, and the shaft portion is embedded in the ground by the propelling action of the excavation blade. On the other hand, the shaft portion and the excavation blade are rotated in the reverse direction by the reverse rotational force input from the input portion, and the shaft portion is pulled out from the ground by the propelling action of the excavation blade. Since the coupling part coupled to the fixed object is detachably attached to the coupling base part, when the tool for rotating the shaft part is attached to the input part, there is an obstacle to the tool installation or rotation operation. It is possible to disengage the bonding portion that may become the bonding base portion. Thereby, workability | operativity when embedding a shaft part in the ground or removing from the ground can be improved.

  Another feature of the present invention is that the input unit includes a tool mounting unit on which a tool for rotating the shaft unit is mounted from an axial direction of the shaft unit.

  In this configuration, since the tool is mounted on the tool mounting portion from the axial direction of the shaft portion, the tool can be easily mounted in combination with the input portion provided on the upper portion of the shaft portion. For example, an impact wrench or the like is used as the tool.

  Another feature of the present invention is that the coupling portion has an annular portion that constitutes a through hole through which the fixed object is inserted.

  In this configuration, the fixed object can be fixed by being inserted through the through hole.

  Another feature of the present invention is that the coupling portion has a hook portion that is hooked on the fixed object.

  In this configuration, the fixed object can be hooked and fixed by the hook portion.

In order to achieve the above object, the underground structure according to the present invention is characterized by an underground structure for fixing an object to be fixed on the ground surface, a rod-shaped shaft portion embedded in the ground, The excavation blade spirally provided on the shaft portion, the input portion provided on the upper portion of the shaft portion to which a rotational force for rotating the shaft portion in the circumferential direction is input, and the fixed object And a coupling base provided on an upper portion of the shaft portion to which the coupling portion is detachably mounted. The coupling portion is provided at a lower end portion of a cylindrical support portion on which a male screw is formed. A main body portion having a male screw portion formed so as to have a smaller diameter than the support portion and removably screwed to the coupling base portion, and a first annular portion through which the support portion of the main body portion passes is provided. times that the fixed object rotatably attached to the same supporting portion are coupled to Comprising members and, a first nut and second nut securing across the same rotating member screwed from both sides of the pivot member relative to the support portion in the main body portion, the shaft portion and the drilling The blade is embedded in the ground by the propelling action of the excavation blade by rotating in the circumferential direction with the rotational force input from the input unit, and the entire input unit and the coupling base are It exists in the bottomed hole formed with the excavation blade.

  In this configuration, since the entire input portion and the coupling base are disposed in the bottomed hole formed by the excavating blade, a part of the input portion and the coupling base does not protrude upward from the ground surface. Therefore, in a state where the coupling portion is separated from the coupling base portion, a portion protruding upward from the ground surface can be completely eliminated, and an accident caused by a stumbling can be prevented.

  Another feature of the present invention is that when the fixed object is fixed, the coupling part is attached to the coupling base, and when the fixed object is not fixed, a lid that closes the bottomed hole is attached to the coupling part. Instead, it is attached to the coupling base.

  In this configuration, when the object to be fixed is not fixed, the bottomed hole is closed with the lid, so that it is possible to prevent dirt or dust from entering the bottomed hole or the opening of the bottomed hole from collapsing.

  Another feature of the present invention is that the lid has a plate-like lid plate portion that closes the opening of the bottomed hole on the ground surface and is made of a material that is more easily deformed than the coupling base portion. It is in.

  In this configuration, since the lid is formed of a material that is more easily plastically or elastically deformed than the coupling base, the lid plate portion can be deformed according to a gap, an inclination, or the like with the ground surface. It is possible to more effectively prevent soil and dirt from entering the bottom and the opening of the bottomed hole from collapsing. In this case, in the underground structure, the coupling base or the entire peg main body can be made of an iron material, and the lid can be made of aluminum or an aluminum alloy.

It is a front view which shows the structure of the underground structure which concerns on one Embodiment of this invention. It is a disassembled perspective view which shows the structure of the peg which concerns on one Embodiment of this invention. It is a front view which shows the state which does not fix the fixed target object in an underground structure. It is a figure which shows the structure of a cover body, (A) is a top view, (B) is a front view. It is a front view which shows the structure and use condition of another coupling | bond part. It is a front view which shows the structure of another coupling | bond part. It is a front view which shows the structure and use condition of another coupling | bond part. It is a figure which shows the structure of another cover body, (A) is a top view, (B) is a front view. It is a perspective view which shows the structure of the peg which concerns on other embodiment. It is a perspective view which shows the structure of the peg which concerns on other embodiment.

  Hereinafter, embodiments of an underground structure and a peg according to the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing a configuration of an underground structure 10 according to an embodiment of the present invention. FIG. 2 is a perspective view showing the configuration of the peg 12 according to one embodiment of the present invention. As shown in FIG. 1, the underground structure 10 and the peg 12 are for fixing the fixed object 14 on the ground surface G, and the main part of the underground structure 10 is composed of the peg 12. . The fixed object 14 shown in FIG. 1 is an air play, and the peg 12 is configured to be able to fix a fixing rope 14a of the air play. The fixed object 14 is not limited to the air play equipment, and may be a tent tensioning rope, a pet pulling rope, a soccer goal, or the like.

  As shown in FIG. 1, the underground structure 10 includes a rod-shaped shaft portion 16 embedded in the ground, excavation blades 18 spirally provided on the shaft portion 16, and the shaft portion 16 rotates in the circumferential direction. The input part 20 into which the rotational force for making it input is provided, the coupling | bond base part 22, and the coupling | bond part 24 couple | bonded with the fixed target object 14 are provided. As shown in FIG. 2, the shaft portion 16, the excavation blade 18, the input portion 20, and the coupling base portion 22 are integrally formed so as to constitute a peg body 26 that is an independent part. The coupling portion 24 is detachably attached to the coupling base portion 22 of the peg body 26. In addition, although the material of the peg main body 26 and the coupling | bond part 24 is not specifically limited, In this embodiment, metals, such as aluminum or iron, are used. In addition, the method for forming the peg body 26 is not particularly limited, such as casting or forging, but in this embodiment, cutting that cuts from the base material is used.

  As shown in FIG. 1, the shaft portion 16 is a rod-like member that is completely embedded in the ground below the ground surface G. The cross-sectional shape of the shaft portion 16 is circular, and the lower end portion 16a of the shaft portion 16 is formed to be sharp so that the diameter becomes smaller as it goes downward.

  As shown in FIG. 2, a columnar head portion 28 and a hexagonal columnar input portion 20 are continuously provided in the axial direction on the upper portion of the shaft portion 16. The input unit 20 of the present embodiment includes a tool mounting unit 20 a on which a tool such as an impact wrench is mounted from the axial direction of the shaft unit 16. That is, the six side surfaces of the input unit 20 are arranged in parallel to the axis of the shaft portion 16, and each side surface is a tool mounting portion 20 a on which a tool is mounted from the axial direction of the shaft portion 16. .

  As shown in FIG. 2, a screw hole 30 is formed in the central portion of the head 28 and the input unit 20, and an opening of the screw hole 30 is opened in the upper end surface 20 b of the input unit 20. In the present embodiment, the entire head portion 28 and the input portion 20 in which the screw holes 30 are formed serve as a coupling base portion 22 to which the coupling portion 24 is detachably mounted.

  As shown in FIG. 1, the excavation blade 18 is divided into a first portion 18a, a second portion 18b, and a third portion 18c, and these diameters are gradually increased from the bottom to the top. D1, D2 and D3 (D1 <D2 <D3). The number of windings of the first portion 18a, the second portion 18b, and the third portion 18c is all one or more. Further, stepped portions 32a and 32b are formed at the boundary between the first portion 18a and the second portion 18b and at the boundary between the second portion 18b and the third portion 18c so that the diameter of the excavation blade 18 increases rapidly. Has been.

  As shown in FIG. 2, the coupling portion 24 includes a main body portion 34, a first nut 36, a rotating member 38, and a second nut 40. The main body portion 34 includes a columnar support portion 42 for supporting the rotation member 38, a male screw portion 44 provided at the lower end portion of the support portion 42, and an input portion 46 provided at the upper end portion of the support portion 42. And have. The outer diameter of the male screw portion 44 is smaller than the outer diameter of the support portion 42. A male screw 42 a is formed on the outer peripheral surface of the support portion 42, and a male screw 44 a is formed on the outer peripheral surface of the male screw portion 44. The input unit 46 is a portion to which a rotational force is input from a tool such as a manual wrench or an electric impact wrench, and is formed in a hexagonal column shape in this embodiment.

  As shown in FIG. 2, the first nut 36 and the second nut 40 are fixed on the outer periphery of the main body portion 34 with the rotating member 38 sandwiched from above and below. The first nut 36 is formed with a female screw 36a that is screwed to the male screw 42a of the support portion 42, and the second nut 40 is formed with a female screw 40a that is screwed to the male screw 42a of the support portion 42. Yes.

  As shown in FIG. 2, the rotation member 38 is rotatably attached to the support portion 42 of the main body portion 34, and the first annular portion constituting the through hole 48 a through which the support portion 42 is inserted. 48, a second annular portion 50 that constitutes a through hole 50a through which the fixed object 14 (FIG. 1) is inserted, and a connecting portion 52 that connects the first annular portion 48 and the second annular portion 50. ing. The first annular portion 48 is formed so that its cross section is a quadrangle, and the second annular portion 50 is formed so that its cross section is circular.

  As shown in FIG. 1, when fixing the fixed object 14 using the peg 12, a first step of embedding the peg body 26 in the ground, a second step of attaching the coupling portion 24 to the peg body 26, The 3rd process which couple | bonds the coupling | bond part 24 with the fixed target object 14 is performed in this order.

  In the first step, first, a portion to be fixed on the fixed object 14 shown in FIG. 1 is confirmed, and an embedding position P of the peg body 26 is determined in the vicinity of the portion. Subsequently, the lower end portion 16a of the shaft portion 16 in the peg body 26 is disposed at the embedding position P, and the upper end surface 20b (FIG. 2) of the input portion 20 in the peg body 26 is struck with a hammer or the like. 16a is embedded in the ground.

  Thereafter, a tool such as an impact wrench is mounted on the tool mounting unit 20 a of the input unit 20, and a rotational force in the circumferential direction (positive direction) is input from the tool to the input unit 20. Then, the whole peg main body 26 is rotated in the forward direction, and the peg main body 26 is buried deep in the ground by the propelling action of the excavation blades 18. When the input part 20 and the entire coupling base part 22 reach the bottomed hole 54 formed by the excavation blades 18, the tool is removed from the tool mounting part 20a. At the stage where the first step is completed, the entire input portion 20 and the coupling base portion 22 are disposed in the bottomed hole 54 formed by the excavation blades 18, and the upper part of the peg body 26 extends upward from the ground surface G. It does not protrude.

  In the second step, as shown in FIG. 2, the male screw 44 a of the coupling portion 24 is screwed into the screw hole 30 of the peg main body 26, and the main body portion 34 of the coupling portion 24 is connected to the coupling base portion 22 of the peg main body 26. . At this time, a tool such as an impact wrench is attached to the input unit 46 of the peg body 26, and a circumferential rotational force is input to the input unit 46 from the tool. When the connection of the main body 34 to the coupling base 22 is completed, the first nut 36, the rotating member 38, and the second nut 40 are disposed on the outer periphery of the main body 34, and the rotating member 38 is connected to the first nut 36 and the second nut. The nut 40 is sandwiched and fixed from above and below.

  In the third step, the fixed rope 14a of the fixed object 14 shown in FIG. 1 is inserted through the through hole 50a of the second annular portion 50, and the second annular portion 50 is coupled to the fixed rope 14a. In addition, the coupling | bonding method of the coupling | bond part 24 with respect to the fixation target 14 is not limited to this embodiment, For example, the 2nd annular part 50 is hooked on the hook part (illustration omitted) provided in the fixation target part 14. FIG. A method may be used.

  FIG. 3 is a front view showing a state where the fixed object 14 in the underground structure 10 is not fixed. As shown in FIG. 3, when the fixed object 14 (FIG. 1) is not fixed using the underground structure 10, the lid 60 that closes the bottomed hole 54 is connected instead of the connecting portion 24 (FIG. 1). Attach to the base 22. The lid 60 has a plate-like lid plate portion 62 that closes the opening of the bottomed hole 54 on the ground surface G, and a support portion 64 that supports the lid plate portion 62. The lid plate portion 62 and the support portion 64 of this embodiment are integrally formed of aluminum or an aluminum alloy.

  4A and 4B are diagrams showing the configuration of the lid 60, where FIG. 4A is a plan view and FIG. 4B is a front view. As shown in FIG. 4A, the lid plate portion 62 of the lid body 60 is formed in a circular plate shape in plan view, and a hexagon wrench is inserted into the center of the upper surface of the lid plate portion 62. A hexagonal bottomed hole 62a is formed in plan view. As shown in FIG. 4B, the thickness of the cover plate portion 62 is the thickest at the central portion and gradually decreases from the central portion toward the outer peripheral portion. A cylindrical support part 64 is provided at the center of the lower surface of the cover plate part 62, and the outer peripheral surface of the support part 64 is screwed into the screw hole 30 (FIG. 3) of the coupling base part 22. A male screw 64a is formed.

  As shown in FIG. 3, when the lid 60 is coupled to the coupling base portion 22 of the peg body 26, first, the male screw 64 a of the support portion 64 is positioned with respect to the screw hole 30 of the coupling base portion 22. Subsequently, a hexagon wrench (not shown) is inserted into the bottomed hole 62a (FIG. 4A), and the entire lid 60 is rotated in the circumferential direction using this. Then, the male screw 64a of the support portion 64 is screwed into the screw hole 30 of the coupling base portion 22, and the cover plate portion 62 is supported on the ground surface G. When the ground surface G is inclined or when the peg body 26 is inserted in a state inclined with respect to the ground surface G, a gap may be generated between the cover plate portion 62 and the ground surface G. In this case, the cover plate portion 62 formed of aluminum or aluminum alloy is deformed along the ground surface G in order to eliminate the gap.

  In this case, the peg body 26 or at least the coupling base portion 22 is made of a material harder than the lid body 60, so that the peg body 26 or the coupling base portion 22 is not plastically deformed when a force is applied to the lid body 60. The lid 60 can be plastically deformed or elastically deformed. For example, in the underground structure 10, the peg body 26 can be made of an iron material (for example, carbon steel), and the lid body 26 can be made of an aluminum material. According to this, in the underground structure 10, when a gap is generated between the lid plate portion 62 and the ground surface G, an automobile or the like is placed on the lid plate portion 62 or an impact by a tool or the like is applied. In this case, the lid body 60 is positively deformed and becomes compatible with the ground surface G, and deformation and damage of the peg body 26 can be prevented.

  According to the present embodiment, the following effects can be achieved by the above configuration. That is, since the coupling portion 24 coupled to the fixed object 14 shown in FIG. 1 is detachably attached to the coupling base portion 22, a tool for rotating the shaft portion 16 is attached to the input portion 20. In some cases, the coupling portion 24 that may become an obstacle to tool mounting or rotation operation can be detached from the coupling base portion 22. Thereby, workability | operativity when embedding the shaft part 16 in the ground or removing from the ground can be improved.

  Since the input unit 20 shown in FIG. 2 has a tool mounting part 20a on which the tool is mounted from the axial direction of the shaft part 16, coupled with the fact that the input part 20 is provided on the upper part of the shaft part 16, Tools can be easily installed.

  As shown in FIG. 1, the entire input portion 20 and the coupling base portion 22 are disposed in the bottomed hole 54 formed by the excavation blades 18, so that the input portion 20 and a part of the coupling base portion 22 are separated from the ground surface G. It does not protrude upward. Therefore, in a state where the coupling portion 24 is detached from the coupling base portion 22, a portion protruding upward from the ground surface G can be completely eliminated, and an accident due to a trip or the like can be prevented.

  As shown in FIG. 3, when the fixed object 14 (FIG. 1) is not fixed using the underground structure 10, the lid body 60 that closes the bottomed hole 54 is attached to the coupling base 22. It is possible to prevent dirt and dust from entering 54 and the opening of the bottomed hole 54 from collapsing.

  3 is formed of a material that is more easily deformed than the peg body 26, such as aluminum or an aluminum alloy, the lid plate part 62 can be deformed so as to be in contact with the ground surface G. It is possible to more effectively prevent dirt and dust from entering the hole 54 and the opening of the bottomed hole 54 from collapsing.

  In carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention. For example, in the above embodiment, the cover plate portion 62 shown in FIG. 3 is formed of aluminum or an aluminum alloy, but an oxide film may be formed on the surface of the cover plate portion 62 by anodizing, This oxide film may be colored. When the cover plate portion 62 is colored and anodized, the cover plate portion 62 can be made conspicuous, and thus the cover plate portion 62 can be used as an index.

  FIG. 5 is a front view showing the configuration and use state of another coupling portion 70. As shown in FIG. 1, in the above embodiment, the coupling portion 24 has the second annular portion 50, but as shown in FIG. 5, the coupling portion 70 is hooked 72 to be hooked on the fixed object 84. You may have.

  The coupling part 70 shown in FIG. 5 has a main body part 74, a first nut 76, a rotating member 78, and a second nut 80. The rotating member 78 has an annular portion 82 disposed on the outer periphery of the main body portion 74 and a hook portion 72 connected to the annular portion 82. The hook portion 72 has a curved portion 72a that protrudes upward so that the fixed object 84 can be pressed from above. Note that the term “coupled” used in the description of the present invention has a broad meaning, and holding the fixed object 84 from above with the hook portion 72 is also an aspect of “coupled”.

  FIG. 6 is a front view showing the configuration of another coupling portion 86. As shown in FIG. 1, in the above-described embodiment, the coupling portion 24 is configured by a plurality of independent components. However, as illustrated in FIG. 6, the coupling portion 86 may be configured as a single independent component. Good. The coupling portion 86 shown in FIG. 6 has a cylindrical shape that connects the annular portion 88, the male screw portion 90, and the annular portion 88 and the male screw portion 90 that form a through hole 88 a through which a fixed object (not shown) is inserted. It is comprised with what is called an eyebolt which has the connection part 92. FIG. A male screw 90 a is formed on the outer peripheral surface of the male screw portion 90. When attaching the coupling portion 86 to the peg body 26 shown in FIG. 2, the male screw 90 a of the coupling portion 86 is screwed into the screw hole 30 of the peg body 26.

  FIG. 7 is a front view showing the configuration and use state of another coupling portion 94. 7 is for supporting a rope 96 that prevents entry of a person or a vehicle at a construction site or the like. Similar to the connection portion 86 shown in FIG. And a cylindrical connecting part 100. The length of the connecting portion 100 is determined according to the height at which the rope 96 is stretched. In the present embodiment, the length is determined within a range of 60 to 90 cm. When the rope 96 is supported using the pegs 102 having the coupling portions 94, a plurality of pegs 102 are arranged along the ropes 96, and the ropes 96 are inserted into the through holes 98 a of the pegs 102.

  FIGS. 8A and 8B are diagrams showing the configuration of another lid 106, in which FIG. 8A is a plan view and FIG. 8B is a front view. When the fixed object 14 is not fixed using the underground structure 10 shown in FIG. 1, the cover body 106 shown in FIGS. 8A and 8B is used instead of the cover body 60 shown in FIG. May be. As shown in FIG. 8A, the lid plate portion 108 of the lid body 106 is formed in a circular plate shape in plan view, and a hexagon wrench is inserted into the center of the upper surface of the lid plate portion 108. A bottomed hole 106a is formed. As shown in FIG. 8B, a columnar support portion 110 is provided at the center of the lower surface of the lid plate portion 108. The support part 110 is formed such that the outer diameter gradually increases from the lower end part upward, and the maximum outer diameter of the support part 110 is made larger than the inner diameter of the screw hole 30 shown in FIG. . Therefore, when the support part 110 is inserted into the screw hole 30 (FIG. 3), the support part 110 is brought into contact with and fixed to the inner peripheral surface of the screw hole 30.

  FIG. 9 is a perspective view showing a configuration of a peg 112 according to another embodiment. In the peg 112 shown in FIG. 9, a cylindrical male screw portion 116 is provided on the upper portion of the shaft portion 114. A hexagonal bottomed hole 118 is formed in the center of the male screw portion 116 in plan view, and a male screw 116 a is formed on the outer peripheral surface of the male screw portion 116. In the peg 112, a portion where the bottomed hole 118 is formed in the male screw portion 116 is an “input portion” to which a rotational force is input, and each side surface of the bottomed hole 118 is a shaft of the shaft portion 114. A tool mounting portion 118a to which a tool is mounted from the direction is formed. In addition, a portion of the male screw portion 116 where the male screw 116a is formed is a “joining base portion” to which a joint portion (not shown) is detachably attached. Although not shown in the figure, the coupling portion used in the peg 112 is formed with a female screw that is screwed into the male screw 116a.

  FIG. 10 is a perspective view showing a configuration of a peg 122 according to another embodiment. In the peg 122 shown in FIG. 10, a cylindrical coupling base 126 is integrally formed on the upper portion of the shaft portion 124. The coupling base portion 126 is a portion corresponding to the main body portion 34 of the coupling portion 24 shown in FIG. 2, and a male screw 126 a is formed on the outer peripheral surface of the coupling base portion 126. A hexagonal column-shaped input portion 128 to which a rotational force for rotating the shaft portion 124 is input is formed on the upper portion of the coupling base portion 126.

  When a fixed object (not shown) is fixed using the peg 122 shown in FIG. 10, first, the peg body 130 including the shaft portion 124, the coupling base portion 126, and the input portion 128 is put into the ground using a tool. Embed. Subsequently, the first nut 36, the rotation member 38, and the second nut 40 constituting the coupling portion 132 are attached to the coupling base 126. According to this peg 122, since the number of parts of the coupling part 132 can be reduced, workability can be improved.

G: Ground surface, 10 ... Underground structure, 12 ... Peg, 14 ... Fixed object, 16 ... Shaft part,
18 ... Excavation blade, 20 ... Input part, 22 ... Coupling base, 24 ... Coupling part

Claims (7)

A peg for fixing a fixed object on the ground surface,
A rod-shaped shaft part embedded in the ground,
Excavation blades spirally provided on the shaft portion;
An input portion provided at an upper portion of the shaft portion, to which a rotational force for rotating the shaft portion in a circumferential direction is input;
A coupling portion coupled to the fixed object;
A coupling base provided on an upper portion of the shaft portion, to which the coupling portion is detachably mounted;
The coupling portion is
A main body portion having a male screw portion that is formed in a lower diameter portion of the columnar support portion on which the male screw is formed, smaller in diameter than the support portion, and is detachably screwed to and attached to the coupling base portion;
A rotating member that has a first annular portion through which the support portion in the main body portion passes and is rotatably attached to the support portion and to which the fixed object is coupled;
A peg comprising a first nut and a second nut that are screwed into both sides of the rotating member and fixed to the support portion of the main body portion with the rotating member interposed therebetween.
  The peg according to claim 1, wherein the input unit includes a tool mounting unit on which a tool for rotating the shaft unit is mounted from an axial direction of the shaft unit.   The peg according to claim 1, wherein the coupling portion has an annular portion that constitutes a through hole through which the fixed object is inserted.   The peg according to claim 1 or 2, wherein the coupling portion includes a hook portion that is hooked on the fixed object. An underground structure for fixing a fixed object on the ground surface,
A rod-shaped shaft embedded in the ground,
Excavation blades spirally provided on the shaft portion;
An input portion provided at an upper portion of the shaft portion, to which a rotational force for rotating the shaft portion in a circumferential direction is input;
A coupling portion coupled to the fixed object;
A coupling base provided on an upper portion of the shaft portion, to which the coupling portion is detachably mounted;
The coupling portion is
A main body portion having a male screw portion that is formed in a lower diameter portion of the columnar support portion on which the male screw is formed, smaller in diameter than the support portion, and is detachably screwed to and attached to the coupling base portion;
A rotating member that has a first annular portion through which the support portion in the main body portion passes and is rotatably attached to the support portion and to which the fixed object is coupled;
A first nut and a second nut that are screwed from both sides of the rotation member to the support portion in the main body portion and fixed with the rotation member interposed therebetween;
The shaft portion and the excavation blade are embedded in the ground by the propelling action of the excavation blade by being rotated in the circumferential direction by the rotational force input from the input portion,
The whole of the input part and the coupling base part is an underground structure arranged in a bottomed hole formed by the excavation blade.

When fixing the fixed object, the coupling portion is attached to the coupling base,
The underground structure according to claim 5, wherein a lid that closes the bottomed hole is attached to the coupling base instead of the coupling when the fixed object is not fixed. The ground according to claim 6, wherein the lid has a plate-like lid plate portion that closes the opening of the bottomed hole on the ground surface and is made of a material that is more easily deformed than the coupling base portion. Structure.

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