JP2015130835A - Anchor member and anchor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anchor member and an anchor unit that can firmly fix a sheet material, such as a weed-proof sheet, with respect to the ground.SOLUTION: An anchor part 1, which is made of resin, has a screw thread 6 in an outer periphery of an axis 5 and includes: a screw body 2 screwed into the ground from a point; and a head part 3 provided in the back end side of the screw body 2. At least a part of the screw body 2 is buried in the ground. In the outer peripheral surface of the axis 5, a plurality of projections 11, which extend in the longitudinal direction of the axis 5, while intersecting with the screw thread 6, are formed.

Description

  The present invention relates to an anchor member that is fixed in the ground, and more particularly, to an anchor member and an anchor unit that fix a sheet material such as a grassproof sheet or a waterproof sheet to the ground.

  If there is an unpaved ground outside the paved road surface such as a road or a sidewalk, when vines such as vines and weeds grow on this ground, these vegetation may enter the road surface side. . When vegetation overhangs on the road surface, not only is the beauty of the aesthetics impaired, but there is also the possibility of becoming a traffic barrier. For example, if vegetation overhangs the sidewalk, these vegetation can interfere with walking and cause falls or injury. For this reason, conventionally, a weedproof sheet for preventing the growth of vegetation has been laid on the ground. And in order to fix such a weedproof sheet to the ground, the nail-shaped anchor member was used (for example, refer patent document 1).

JP 2011-208438 A

  However, the conventional nail-like anchor member has a weak fixing force with respect to the ground, and the weedproof sheet cannot be sufficiently fixed. For this reason, for example, when the weedproof sheet is blown by a strong wind such as a tornado or a gust of wind, the anchor member may come off the ground and the weedproof sheet may be scattered. In addition, when fixing a sheet material other than the weedproof sheet, such as a waterproof sheet, to the ground, lack of fixing force has been a problem as in the case of the weedproof sheet.

  This invention is made | formed in view of such a situation, The objective is to provide the anchor member and anchor unit which can firmly fix sheet | seat materials, such as a weed prevention sheet, with respect to the ground. is there.

The present invention has been proposed in order to achieve the above-described object, and in the present invention, the screw body has a screw thread on the outer periphery of the shaft and is screwed into the ground from the tip.
A head provided on the rear end side of the screw body;
An anchor member made of resin in which at least a part of the screw body is embedded in the ground,
In the anchor member, the outer peripheral surface of the shaft is formed with a plurality of ridges extending along the longitudinal direction of the shaft while intersecting the screw thread.

The screw body according to claim 2 has a screw thread on the outer periphery of the shaft and is screwed into the ground from the tip.
A head provided on the rear end side of the screw body;
An anchor member made of resin in which at least a part of the screw body is embedded in the ground,
The anchor member is characterized in that a plurality of grooves extending along the longitudinal direction of the shaft are formed on the outer peripheral surface of the shaft while intersecting the screw thread.

In the third aspect of the invention, the head is formed in a polygonal column shape extending along the longitudinal direction of the shaft, and a recess recessed from the top surface of the head is formed.
2. The cross section of the head, wherein the cross section of the recess has a cross sectional shape similar to that of the outer peripheral surface of the head, and the phases are aligned in the same direction. An anchor member according to claim 2.

  The thing of Claim 4 is an anchor member as described in any one of Claim 1 to 3 with which the rear-end part of the said axis | shaft is expanded toward the said head. .

What is described in claim 5 is an anchor member according to any one of claims 1 to 3,
A washer having an insertion hole through which the screw body of the anchor member is inserted, and
The anchor unit is characterized in that an outer peripheral edge of the washer is curved toward the distal end side of the anchor member.

  According to a sixth aspect of the present invention, there is provided the anchor unit according to the fifth aspect, wherein the washer has a through hole formed at a position different from the insertion hole.

  According to the first aspect of the present invention, the screw main body has a screw thread on the outer periphery of the shaft and is screwed into the ground from the tip, and a head provided on the rear end side of the screw main body, and at least A resin-made anchor member in which a part of the screw body is embedded in the ground, and a plurality of ridges extending along the longitudinal direction of the shaft are formed on the outer peripheral surface of the shaft while intersecting with the screw thread Therefore, it can be tightened as it is while making a thread valley (female screw) corresponding to the screw thread in the ground, and for example, the sheet material can be easily fixed to the ground. In addition, the anchor member can be prevented from inadvertently coming off the ground due to earth pressure applied to the screw thread, and the sheet material can be firmly fixed to the ground. Furthermore, when soil in the ground enters the groove formed between the ridges, the earth pressure applied to the threads can be increased, and the resistance to rotation of the shaft can be increased. it can. Thereby, it can suppress further that an anchor member falls carelessly from the ground, and can fix sheet material more firmly. Moreover, since the strength of the shaft can be improved by the ridges, the diameter of the shaft can be reduced, and the anchor member can be downsized. Further, by making the thickness of each ridge constant, the shrinkage rate of the resin in the thickness direction of the ridge when resin molding can be made uniform, and distortion due to sinking can be suppressed. Furthermore, generation of vacuum voids inside the shaft can be suppressed.

  According to the second aspect of the present invention, the screw main body having a screw thread on the outer periphery of the shaft and screwed into the ground from the tip, and a head provided on the rear end side of the screw main body, A resin anchor member in which a part of the screw body is embedded in the ground, and a plurality of grooves extending along the longitudinal direction of the shaft are formed on the outer peripheral surface of the shaft while intersecting the screw thread. Therefore, it can be tightened as it is while creating a thread valley corresponding to the screw thread in the ground, and for example, the sheet material can be easily fixed to the ground. In addition, the anchor member can be prevented from inadvertently coming off the ground due to earth pressure applied to the screw thread, and the sheet material can be firmly fixed to the ground. Furthermore, when the underground soil or the like enters the groove, the earth pressure applied to the screw thread can be increased, and the resistance against rotation of the shaft can be increased. Thereby, it can suppress further that an anchor member falls carelessly from the ground, and can fix sheet material more firmly. Moreover, since the strength of the shaft can be improved by the ridges formed between the grooves, the diameter of the shaft can be reduced, and the anchor member can be downsized. Further, by making the thickness of each ridge constant, the shrinkage rate of the resin in the thickness direction of the ridge when resin molding can be made uniform, and distortion due to sinking can be suppressed. Furthermore, generation of vacuum voids inside the shaft can be suppressed.

  According to the invention described in claim 3, the head is formed in a polygonal column shape extending along the longitudinal direction of the shaft, and a recess recessed from the top surface of the head is formed. In the cross-section, the shape of the cross-section of the recess is similar to the cross-sectional shape of the outer peripheral surface of the head, and the phase is aligned in the same direction, so a spanner having an opening that engages with the outer peripheral surface of the head The anchor member can be tightened into the ground by using not only a wrench but also a bar-like wrench or wrench engaged with the inner peripheral surface of the recess. That is, since the anchor member can be tightened into the ground using two types of spanners and wrenches, the degree of freedom at the site is improved. Moreover, the thickness of the wall between the inner peripheral surface and the outer peripheral surface can be made uniform, and the shrinkage rate of the resin in the thickness direction of the wall when resin molding can be made uniform. As a result, distortion due to sink marks can be suppressed. Furthermore, it can suppress that a vacuum void generate | occur | produces inside a head.

  According to invention of Claim 4, since the rear-end part of the axis | shaft is diameter-expanded toward the head, when fastening an anchor member in the ground, the rear-end part of this diameter-expanded axis | shaft Thus, the soil near the ground surface can be strongly pressed obliquely downward, and the soil in the ground can be actively entered into the groove. Thereby, it is possible to further prevent the anchor member from being carelessly removed from the ground, and to further strengthen the fixing of the sheet material.

  According to the invention described in claim 5, the anchor member according to any one of claims 1 to 3, and a washer having an insertion hole through which the screw body of the anchor member is inserted, Since the outer peripheral edge of the washer is curved toward the distal end side of the anchor member, when the anchor member is tightened into the ground, soil or the like that rises from the ground and tries to escape to the outside can be retained inside the washer. it can. Thereby, the force which presses the ground can be strengthened and the earth pressure concerning a screw thread can be enlarged.

  According to the invention described in claim 6, since the through hole is formed at a position different from the insertion hole, it is possible to tie a rope, a string or the like to the through hole or engage a hook or the like. It can also be used for applications other than fixing the sheet material. For example, it can be used as an anchor used when a tent is stretched.

It is explanatory drawing of an anchor member, (a) is a top view, (b) is a right view, (c) is a rear view, (d) is a left view, (e) is a top view, (f) is a bottom view FIG. It is explanatory drawing of an anchor member, (a) is AA sectional drawing, (b) is BB sectional drawing, (c) is a perspective view. It is an expansion perspective view of a head. It is explanatory drawing of a washer, (a) is sectional drawing, (b) is a perspective view. It is the schematic explaining fixing of the weed prevention sheet | seat using an anchor unit. It is a perspective view of the washer in a 2nd embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. Note that, in the embodiments described below, various limitations are made as preferred specific examples of the present invention. However, the scope of the present invention is not limited to the following description unless otherwise specified. However, the present invention is not limited to this embodiment. Further, the dimensions and the like of the anchor member 1 and the weedproof sheet 18 shown in each embodiment may be different from the actual dimensions and scales for convenience of explanation.

  1 to 3 are explanatory views of the anchor member 1. FIG. 1 (a) is a plan view, FIG. 1 (b) is a right side view, FIG. 1 (c) is a rear view, and FIG. 1 (d) is a left side. FIG. 1E is a plan view, and FIG. 1F is a bottom view. 2A is an AA cross-sectional view, FIG. 2B is a BB cross-sectional view, and FIG. 2C is a perspective view. FIG. 3 is an enlarged perspective view of the head 3.

  The anchor member 1 is a male screw made of resin (synthetic resin) and comprising a screw body 2 and a head 3. The anchor member 1 of the present embodiment is formed so that the longitudinal dimension (full length) is about 20 cm, and the diameter of the screw body 2 (the diameter including the screw thread 6) is about 2.5 cm. In addition, as resin used for the anchor member 1, thermoplastic resins, such as a polystyrene resin, an acrylic resin, a polyester resin, an ABS resin, can be used suitably. As a method of molding the anchor member 1 using such a resin, for example, there is an injection molding process in which the resin is softened by heating and pushed into a mold, and then the resin is solidified by cooling and then taken out from the mold. Is preferred.

  As shown in the drawing, the screw body 2 of the present embodiment has a pointed tip 5a of the shaft 5 that is pointed (tapered) and extends from the middle of the tip 5a toward the rear end (head 3) of the shaft 5. A screw thread 6 is formed across. The screw thread 6 is formed in a spiral shape on the outer periphery of the shaft 5. For example, the screw thread 6 makes about 10 turns around the shaft 5 at a pitch of about 1.5 cm. Note that the pitch and the number of turns of the thread 6 can be appropriately set according to the total length of the anchor member 1 and the state of the ground used. Further, the thread 6 is formed so that the height from the shaft 5 gradually increases from the tip side to the middle of the shaft 5 as shown in FIG. In the present embodiment, the height gradually increases from the first thread 6 to the fifth thread 6 counted from the tip side, and the fifth and subsequent threads 6 are substantially the same height. Are aligned. Thereby, when screwing the screw body 2 into the ground from the tip, the force applied to the anchor member 1 can be reduced, and workability is improved.

  A tapered portion 7 having a diameter expanded toward the head 3 is provided at the rear end portion (neck portion) of the shaft 5. That is, the taper part 7 is diameter-reduced toward the front end side from the rear end side (head 3 side). As shown in FIGS. 2B and 3, the tapered portion 7 of the present embodiment is configured in a cylindrical shape having a tapered hole 8 formed therein. The tapered hole 8 is a hole that opens in the bottom surface of the concave portion 4 of the head 3 to be described later and is recessed from the opening edge to the vicinity of the distal end side of the tapered portion 7. Then, as shown in FIG. 2 (b), the ratio of diameter reduction between the tapered hole 8 and the tapered portion 7 (that is, the taper angle of the tapered hole 8 in the cross section in the major axis direction (inclination angle with respect to the extending direction of the shaft 5). )) Are almost the same. Thereby, the thickness of the wall between the inner peripheral surface of the taper hole 8 and the outer peripheral surface of the taper part 7 can be made substantially constant. That is, uneven thickness of the tapered portion 7 can be suppressed. As a result, distortion caused by so-called sink marks or the like during resin molding can be suppressed. Further, it is possible to suppress vacuum voids (also simply referred to as voids) that are likely to occur when the thickness is increased. Thereby, the intensity | strength of the taper part 7 is securable. In the present embodiment, the thread 6 is formed up to the tip end portion of the tapered portion 7. That is, the front end portion of the tapered portion 7 and the rear end portion (uppermost portion) of the thread 6 are overlapped. Thereby, compared with the other part of the thread 6, the intensity | strength of the uppermost part of the thread 6 which becomes easy to become weak can be raised.

  As shown in FIGS. 1 and 2, the shaft 5 according to the present embodiment extends from the tip portion 5a to the taper portion 7 in the middle of the tip portion 5a. The cross section is formed in a cross shape. That is, the ridges 11 projecting in all directions in the cross section of the shaft 5 are formed, and a groove 12 having a V-shaped cross section is formed between the ridges 11. The screw thread 6 circulates around the ridge 11 and the groove 12. That is, on the outer peripheral surface of the shaft 5, four ridges 11 extending along the longitudinal direction of the shaft 5 while intersecting with the threads 6 are formed. In other words, four grooves 12 extending along the longitudinal direction of the shaft 5 are formed on the outer peripheral surface of the shaft 5 while intersecting the thread 6. In addition, the thickness of each protruding item | line 11 is arrange | equalized with the fixed thickness. Thereby, the distortion by sink etc. at the time of resin molding can be suppressed. Moreover, it can suppress that a vacuum void generate | occur | produces inside the axis | shaft 5, and the intensity | strength of the axis | shaft 5 can be ensured. As a result, even the thick shaft 5 can be easily created by resin molding.

  The head portion 3 of the present embodiment is formed in a hexagonal column shape extending along the longitudinal direction of the shaft 5, and is a portion on the tip side thereof, at a boundary portion with the screw body 2 (taper portion 7), A disc-shaped flange portion 10 extending outward from the head 3 is formed. The diameter of the flange portion 10 is formed larger than the diameter of the tapered portion 7 and the thread 6. A recess 4 that is recessed from the top surface of the head 3 toward the tip side is formed inside the head 3. The cross-sectional shape (planar shape) of the recess 4 is the same as the cross-sectional shape (planar shape) of the outer peripheral surface of the head 3 in the cross-section (plan view) of the head 3 as shown in FIGS. It is formed in a similar shape, that is, a hexagon, and the phases are aligned in the same direction. In other words, the vertices of the inner peripheral surface viewed from the center of the recess 4 are aligned in the same direction as the vertices of the outer peripheral surface of the head 3. Thereby, the thickness of the wall between an inner peripheral surface and an outer peripheral surface can be arrange | positioned substantially uniformly. As a result, distortion due to sink marks or the like during resin molding can be suppressed. Moreover, generation | occurrence | production of a vacuum void can be suppressed inside. The tapered hole 8 described above is opened on the bottom surface of the recess 4.

  Next, the washer 15 attached to the screw body 2 of the anchor member 1 will be described. The anchor member 1 and the washer 15 correspond to the anchor unit in the present invention. 4A is a cross-sectional view of the washer 15, and FIG. 4B is a perspective view of the washer 15. In FIG. 4, the anchor member 1 inserted through the insertion hole 16 of the washer 15 is indicated by a broken line.

  As shown in FIG. 4, the washer 15 is a shallow bowl-shaped member formed of resin in the same manner as the anchor member 1, and an insertion hole 16 through which the screw body 2 is inserted is formed at the center thereof. The insertion hole 16 of the present embodiment is formed to be larger than the diameter of the rear end portion of the taper portion 7 of the screw body 2 and the thread 6 and smaller than the diameter of the flange portion 10 of the head 3. A curved portion 15 a that is curved toward the distal end side of the anchor member 1 is formed on the outer peripheral edge of the washer 15. The bending portion 15a of the present embodiment is bent at a substantially right angle toward the distal end side.

  A method for fixing the weedproof sheet 18 to the ground 17 using the anchor member 1 and the washer 15 will be described. FIG. 5 is a schematic view for explaining fixing of the weedproof sheet 18 by the anchor member 1 and the washer 15. The weedproof sheet 18 is a sheet that is laid on the ground 17 such as a road shoulder or a slope that is not paved to prevent the growth of vegetation, and preferably has light shielding properties, corrosion resistance, heat resistance, and the like. Further, an anchor insertion hole (not shown) through which the screw body 2 of the anchor member 1 can be inserted is formed in the weedproof sheet 18.

  First, the weedproof sheet 18 is laid on the ground 17 where it is desired to prevent the growth of vegetation. Next, the anchor member 1 provided with the washer 15 is inserted into an anchor insertion hole provided at one end of the weedproof sheet 18 and rotated clockwise using a spanner or a wrench (see the arrow in FIG. 5) while the ground 17 Screw in. As a result, the anchor member 1 is buried (entered) while creating a thread valley (internal thread) corresponding to the thread 6 in the ground. Here, since the head 3 of the anchor member 1 is formed in a hexagonal column shape, and the cross-sectional shape of the recess 4 recessed from the top surface of the head 3 is formed in a hexagonal shape, the outer peripheral surface of the head 3 The anchor member 1 can be screwed into the ground by using not only a spanner or a hexagon wrench having an opening to be engaged with but also a rod-shaped spanner or a hexagon wrench engaged with the inner peripheral surface of the recess 4. That is, the anchor member 1 can be screwed into the ground using two types of spanners and wrenches. In the present embodiment, an electric impact having an engaging portion that engages with the outer peripheral surface of the head 3 of the anchor member 1 is used for screwing the anchor member 1 into the ground 17. By using the electric impact in this way, the work efficiency can be improved and the anchor member 1 can be driven easily even on hard ground. As a result, operator fatigue during construction can be reduced.

  When the anchor member 1 is further screwed from the state where the screw thread 6 is buried in the ground, the outer peripheral surface of the tapered portion 7 is buried in the ground while pressing the ground 17 (soil near the ground surface) obliquely downward. Go. Thereafter, when the anchor member 1 advances into the ground 17, the upper surface of the washer 15 (the edge of the insertion hole 16) comes into contact with the head 3 (flange portion 10), and the lower end of the washer 15 (lower end of the curved portion 15 a). ) Comes into contact with the weedproof sheet 18 installed on the ground 17, and the weedproof sheet 18 and the washer 15 are sandwiched between the head 3 and the ground 17. When the anchor member 1 is further screwed in from this state, the washer 15 pressed against the head 3 presses the weedproof sheet 18 against the ground 17, and the weedproof sheet 18 is sandwiched between the washer 15 and the ground 17. . At this time, soil or the like that rises from the ground 17 and escapes outward can be retained inside the washer 15 (curved portion 15a), and the force that presses the ground 17 and the force that sandwiches the weedproof sheet 18 is strengthened. be able to. Finally, the spanner or hexagon wrench is removed from the head 3 with the head 3 on the ground, and the fixing of the weedproof sheet 18 is completed.

  Thus, according to the anchor member 1 of the present invention, the screw body 2 having the screw thread 6 on the outer periphery of the shaft 5 and screwed into the ground 17 from the tip, and the head provided on the rear end side of the screw body 2 And a resin anchor member 1 in which at least a part of the screw main body 2 is embedded in the ground. The outer peripheral surface of the shaft 5 crosses the screw thread 6 while crossing the screw thread 6. Since the ridge 11 extending along the longitudinal direction is formed, it can be tightened as it is while creating a valley corresponding to the screw thread 6 in the ground, and the weedproof sheet 18 is easily fixed to the ground 17. can do. Moreover, the anchor member 1 can be prevented from being carelessly removed from the ground 17 due to earth pressure applied to the screw thread 6, and the weedproof sheet 18 can be firmly fixed to the ground 17. Furthermore, when soil in the ground enters the groove 12 formed between the ridges 11, the earth pressure applied to the screw thread 6 can be increased and resistance to rotation of the shaft 5 can be increased. Can be increased. As a result, the anchor member 1 can be further prevented from being carelessly removed from the ground 17 and the fixing of the weedproof sheet 18 can be further strengthened. Moreover, since the intensity | strength of the axis | shaft 5 can be improved with the protruding item | line 11, the diameter of the axis | shaft 5 can be made small and the anchor member 1 can be reduced in size. Further, by making the thickness of each ridge 11 uniform, the shrinkage rate of the resin in the thickness direction of the ridge 11 during resin molding can be made uniform, and distortion caused by sink marks can be suppressed. Furthermore, the generation of vacuum voids inside the shaft 5 can be suppressed.

  Further, the head 3 is formed in a hexagonal column shape extending along the longitudinal direction of the shaft 5, and a recess 4 that is recessed from the top surface of the head 3 is formed. 4 is formed in a similar shape to the cross-sectional shape of the outer peripheral surface of the head 3 and the phase is aligned in the same direction, a spanner having an opening to be engaged with the outer peripheral surface of the head 3 The anchor member 1 can be tightened into the ground using not only a hexagon wrench but also a rod-shaped spanner or a hexagon wrench that engages with the inner peripheral surface of the recess 4. That is, since the anchor member 1 can be tightened into the ground using two types of spanners and wrenches, the degree of freedom in the field is improved. Moreover, the thickness of the wall between the inner peripheral surface and the outer peripheral surface can be made uniform, and the shrinkage rate of the resin in the thickness direction of the wall when resin molding can be made uniform. As a result, distortion due to sink marks can be suppressed. In addition, the generation of vacuum voids in the head 3 can be suppressed. Furthermore, since the rear end portion of the shaft 5 is expanded in diameter toward the head portion 3, that is, since it has the tapered portion 7, when the anchor member 1 is tightened into the ground, the tapered portion 7 makes the ground surface. The nearby soil can be strongly pressed obliquely downward, and the underground soil or the like can be actively entered into the groove 12. Thereby, it is possible to further suppress the anchor member 1 from being inadvertently pulled out from the ground 17, thereby further strengthening the fixing of the weedproof sheet 18. The washer 15 has an outer peripheral edge that is curved toward the distal end side of the anchor member 1, so that when the anchor member 1 is tightened into the ground, the washer 15 swells up from the ground 17 and escapes outward. 15 can be fastened inside. Thereby, the force which presses the ground 17 can be strengthened and the earth pressure concerning the thread 6 can be enlarged. Further, the washer 15 can block the anchor insertion hole of the weedproof sheet 18 through which the anchor member 1 is inserted from above, so that weeds and the like can be prevented from growing from the anchor insertion hole.

  By the way, the shape of the anchor member 1 is not restricted to embodiment mentioned above. For example, in the above-described embodiment, the shaft 5 is formed in a cross-shaped cross section, that is, four ridges 11 and four grooves 12 are formed on the surface of the shaft 5. It is sufficient that two or more ridges or grooves are formed on the surface. Moreover, the length of a protruding item | line or a groove | channel is not restricted to above-described embodiment, It can set arbitrarily. In short, the ridges or grooves only have to extend along the longitudinal direction so as to intersect at least one thread. Furthermore, in the above-described embodiment, the head 3 is formed in a hexagonal column shape, but is not limited thereto, and may be formed in a polygonal column shape such as a triangular column or a quadrangular column. And a recessed part is formed according to the shape of this head. In the above-described embodiment, the herbicidal sheet 18 is exemplified as the sheet material. However, the sheet material is not limited thereto, and a sheet material such as a waterproof sheet that prevents rainwater or the like from entering the ground is used on the ground using the anchor member. It can also be fixed.

  Furthermore, the shape of the washer 15 is not limited to the above-described embodiment. For example, in the washer 15 ′ in the second embodiment shown in FIG. 6, the through hole 21 is formed at a position different from the insertion hole 16 ′. Specifically, the washer 15 ′ of the present embodiment includes a tongue portion 20 extending obliquely upward outward from a part of the curved portion 15 a ′. A through hole 21 penetrating in the thickness direction is formed in the center of the tongue portion 20. If the anchor member 1 is fixed to the ground using such a washer 15 ′ having the through hole 21, it can be used for purposes other than fixing the weedproof sheet. For example, a rope, a string, or the like can be tied to the through hole 21 or a hook or the like can be engaged, and can be used as an anchor used when a tent is stretched. Since other forms are the same as the above-described embodiment, the description thereof is omitted.

  By the way, the position of the through hole 21 is not limited to the second embodiment described above, and can be appropriately set at a position deviated from the insertion hole 16 ′. Further, the extending direction of the tongue portion 20 is not limited to the above-described second embodiment, and for example, the tongue portion can be extended in a direction perpendicular to the upper surface of the washer. And a through-hole is formed in this tongue part. Furthermore, the number of tongues and through holes is not limited to one as in the second embodiment described above, and a plurality of tongues and through holes can be provided.

In addition, the length of the screw body 2 of the anchor member 1 in each of the above-described embodiments, the height of the screw thread, the number of rounds of the screw thread, the size of the head and the size of the flange, and the size of the washer, The dimensions of each part such as the size of the insertion hole and the size of the through hole can be appropriately determined.
The present invention is not limited to the above-described embodiment, but includes all modifications within the scope of the claims.

DESCRIPTION OF SYMBOLS 1 Anchor member 2 Screw main body 3 Head 4 Recessed part 5 Shaft 5a Tip part 6 Screw thread 7 Tapered part 8 Tapered hole 10 Flange part 11 Projection 12 Groove 15 Washer 15a Curved part 16 Insertion hole 17 Ground 18 Weed prevention sheet 20 Tongue part 21 Through hole

Claims (6)

A screw body having a thread on the outer periphery of the shaft and screwed into the ground from the tip;
A head provided on the rear end side of the screw body;
An anchor member made of resin in which at least a part of the screw body is embedded in the ground,
An anchor member, wherein a plurality of ridges extending along the longitudinal direction of the shaft while being intersected with the screw thread are formed on the outer peripheral surface of the shaft. A screw body having a thread on the outer periphery of the shaft and screwed into the ground from the tip;
A head provided on the rear end side of the screw body;
An anchor member made of resin in which at least a part of the screw body is embedded in the ground,
An anchor member, wherein a plurality of grooves extending along the longitudinal direction of the shaft are formed on the outer peripheral surface of the shaft while intersecting the screw thread. The head is formed in a polygonal column shape extending along the longitudinal direction of the shaft, and a recess recessed from the top surface of the head is formed.
2. The cross section of the head, wherein the cross section of the recess has a cross sectional shape similar to that of the outer peripheral surface of the head, and the phases are aligned in the same direction. The anchor member according to claim 2.   The anchor member according to any one of claims 1 to 3, wherein a diameter of a rear end portion of the shaft is increased toward the head portion. The anchor member according to any one of claims 1 to 3,
A washer having an insertion hole through which the screw body of the anchor member is inserted, and
An anchor unit, wherein an outer peripheral edge of the washer is curved toward a tip end side of the anchor member.   The anchor unit according to claim 5, wherein the washer has a through hole formed at a position different from the insertion hole.

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