JP2019106964A - Fixture - Google Patents

Abstract

[Problem] To provide a fixing device capable of stabilizing the laying state of a sheet-like body. [Solution] The fixing device 1 includes a substantially rod-shaped embedding portion 2 that penetrates a plastic film Pf installed on the ground G and is embedded in the ground G, and a holding portion 3 that sandwiches the plastic film Pf between the embedding portion 2 and the ground G. The embedding maintaining portion 4, which is a portion of the embedding portion 2 on the holding portion 3 side, includes a pair of opposing outer ribs 6 that extend along the longitudinal direction of the embedding portion 2, a connecting rib 8 that connects between the pair of outer ribs 6, a cross rib 9 that extends perpendicular to the connecting rib 8, and a V-shaped rib 12 that protrudes from both sides of the connecting rib 8 toward the outer periphery of the embedding portion 2 and extends obliquely from the pair of outer ribs 6 toward the cross rib 9 located between them toward the tip of the embedding portion 2. The V-shaped rib 12 protrudes toward the outer periphery of the embedding portion 2 beyond the cross rib 9, and is also connected to the outer edge of the cross rib 9. [Selected Figure] Figure 1

Description

  The present invention relates to a fixing device for fixing a sheet-like body laid on an installation surface such as the ground to the installation surface.

  Conventionally, there is a case where a sheet-like body is laid on the ground or the like for supporting growth of agricultural products or for greening. Further, it is known to use a pile-like fixing tool to fix the sheet-like body to the ground or the like (see, for example, Patent Document 1).

Patent No. 3421830

  By the way, as for the fixing tool of patent document 1, while the underground plug-in part inserted in the ground has comprised the substantially cylindrical shape which made the front end side thin, and a surface with a smooth outer peripheral surface basically It has become. Therefore, while it is easy to insert the fixing tool into the ground, the fixing tool may be pulled out of the ground when the fixing tool is pulled upward or to the side by a sheet-like body that is blown by the wind. There is concern about

  The present invention has been made to solve the above-described problems and the like, and it is an object of the present invention to provide a fixing device capable of further stabilizing the laying state of the sheet-like material.

  In the following, each means suitable for solving the above object and the like will be described by item. In addition, specific effects and the like are added to the corresponding means as needed.

Means 1. A substantially rod-like embedded portion, and a pressing portion connected to one end of the embedded portion and having a diameter larger than that of the embedded portion;
In the fixture, the embedded portion penetrates the sheet-like body installed in the installation surface and is embedded in the installation surface, and the pressing portion sandwiches the sheet-like body with the installation surface.
The embedding unit is
A pair of opposing outer ribs extending along the longitudinal direction of the embedded portion;
A connecting rib connecting between the widthwise middle positions of the pair of outer ribs, and a cross rib extending intersecting with the connecting rib, and having a cross-shaped cross section extending along the longitudinal direction of the embedded portion An embedding and retaining portion having an inner rib and having a substantially U-shaped cross section is provided in a range including at least a connecting portion with the pressing portion,
The embedding and retaining part protrudes from the both side surfaces of the connection rib to the outer peripheral side of the embedding part, and from the pair of outer ribs toward the intersecting rib positioned therebetween, the retaining part of the embedding part is pressed A V-shaped rib extending obliquely to the tip end side which is the end on the side where the parts are not connected,
The fixture according to claim 1, wherein the V-shaped rib protrudes to an outer peripheral side of the embedded portion more than the cross rib and is also connected to an outer edge of the cross rib.

  According to the means 1, when the fixture is installed on the installation surface, the installation surface structure (for example, soil etc.) constituting the installation surface includes the inner rib, the outer rib, and the V-shaped rib of the embedded portion. Enter the area enclosed by. That is, as the fixing tool itself, the embedded portion (embedding holding portion) is appropriately shaped like a cross-shaped substantially king-like shape, and weight saving, resource saving, and the like can be achieved. On the other hand, for example, in the case where the installation surface construction is soil, when removing the fixture installed on the installation surface from the installation surface, it is necessary to lift together the soil that has entered inside the embedding maintenance unit Will occur. In particular, the V-shaped rib protrudes to the outer peripheral side of the embedded portion more than the cross rib, and when removing the fixing tool from the installation surface, the soil etc. located above the projecting portion of the V-shaped rib It is necessary to push away with the letter rib. Therefore, the weight (resistance in the removal direction) of the fixture installed on the installation surface can be efficiently added using the installation surface configuration, and stabilization of the installation condition of the fixture, etc. is achieved. be able to. As a result, fasteners can be used to further stabilize the laying condition of the sheet-like body.

  Furthermore, the V-shaped rib is configured to be narrowed toward the tip end side of the embedded portion. For this reason, when installing a fixing tool in an installation surface, a V-shaped rib can be relatively easily inserted with respect to an installation surface. Therefore, even in the case of providing the V-shaped rib which protrudes to the outer peripheral side of the embedded portion more than the cross rib, it is possible to suppress the decrease in the installation workability of the fixing tool. In addition, the upper surface of the V-shaped rib in the installation state of the fixture more securely receives the installation surface structure located above it (the installation surface structure located above the V-shaped rib is V-shaped) Since the shape is difficult to escape to both sides of the rib, it is possible to more reliably prevent the relative displacement of the V-shaped rib (embedded portion) upward. Therefore, the effect of achieving stabilization and the like of the installation state of the fixing tool is further enhanced.

  "In the cross section of the embedding and retaining portion, the distance between the intersection and the portion of the outer edge of the V-shaped rib that is most distant from the intersection between the connection rib and the intersection rib is It may be configured to be longer than the distance between the intersection and the portion of the outer surface of the outer rib that is most distant from the intersection. In this case, it is possible to suppress rotational displacement and tilting displacement of the embedded portion embedded in the installation surface by the V-shaped rib protruding from the embedded portion to the outer peripheral side. Therefore, it is possible to prevent a situation in which the fixing tool is easily removed due to the displacement of the embedded portion. Further, the shape of the V-shaped rib is not limited to a configuration extending linearly between the outer rib and the cross rib, and may be curved and extended (for example, approximately U in a side view) (It may be shaped like a letter).

Means 2. There is provided an auxiliary rib connecting between a tip end edge of the V-shaped rib which is an edge portion on the tip end side of the embedded portion and an outer end edge of the cross rib,
The auxiliary rib is characterized in that the protruding length from the tip end edge of the V-shaped rib becomes gradually shorter from the outer edge of the cross rib toward the outer peripheral side of the embedded portion. The fixture according to 1.

  According to the means 2, when the fixing tool is installed on the installation surface (ground or the like), when the V-shaped rib penetrates the sheet-like body or is embedded in the installation surface, the V-shaped rib When the sheet-like body and the installation surface construction (such as soil) that forms the installation surface contact the edge (tip edge) in the embedding direction on the installation surface of the fixture, etc. By the inclination of the auxiliary rib, the sheet-like body and the installation surface structure are guided in the outer peripheral direction of the embedded portion. Therefore, the V-shaped rib can be relatively smoothly inserted and inserted into the sheet-like body and the installation surface, and the installation workability of the fixing tool can be improved. In particular, with regard to the sheet-like body, the V-shaped rib may be broken relatively widely when the V-shaped rib is inserted, or the V-shaped rib may not be properly inserted into the sheet-like body. Can prevent the sheet from being buried in the ground.

  In addition, the auxiliary rib can reinforce the connecting portion between the end edge of the V-shaped rib and the cross rib, and when installing the fixture, when recovering, or force in the direction of removing from the installation surface by the sheet-like body When it is added, it is possible to prevent the V-shaped rib from being broken at the root portion or the like.

Means 3. And a reinforcing portion that protrudes from the inner rib or the outer rib toward the outer periphery of the embedded portion, extends along the longitudinal direction of the embedded portion, and is connected to the pressing portion.
In a cross section of a portion near the end portion on the side connected to the pressing portion in the embedded portion, the distance from the intersection of the connection rib and the intersection rib to the outer edge portion of the reinforcing portion is The fixture according to the means 1 or 2, characterized in that it is configured to be longer than the distance between the intersection and the portion of the outer surface that is most distant from the intersection.

  According to the means 3, the embedded portion and the pressing portion can be more firmly connected by the reinforcing portion. Therefore, it is possible to prevent a situation in which the pressing portion is deformed and damaged by being inclined relative to the embedded portion. Moreover, the strength and rigidity of the pressing portion can be enhanced by providing the reinforcing portion. Therefore, for example, when installing the fixing tool on the installation surface, the pressing section is deformed when the pressing section is struck with a hammer or the pressing section is stepped by the operator in the installation state of the fixing tool.・ We can control the situation that it is damaged. Furthermore, when the holding portion is beaten with a hammer or the like when installing the fixing tool on the installation surface, the force due to the beat can be more efficiently transmitted to the embedded portion. Therefore, the installation workability of the fixture can be improved. In particular, as in the present means, the embedded portion and the pressed portion can be more strongly connected or the pressed portion can be deformed by causing the reinforcing portion to protrude as much as possible to the outer peripheral side of the embedded portion and connecting with the pressed portion. The action and effect such as prevention can be achieved more remarkably.

  Note that “the reinforcing portion may be provided so as to extend the cross rib to the outer peripheral side of the embedded portion”. In this case, it is possible to effectively increase the strength (rigidity) of the portion where the outer rib is not provided in the connecting portion between the embedding maintaining portion and the pressing portion.

Means 4. A locking projection projecting obliquely from the inner rib or the outer rib toward the outer peripheral side of the embedded portion toward the pressing portion;
In the embedded portion, the inner rib or the outer rib is inclined toward the outer peripheral side of the embedded portion toward the outer peripheral side on the pressing portion side with respect to the portion where the retaining projection is provided. And a positioning projection that
The positioning projection is configured such that the projection length is smaller than that of the retaining projection and the angle with respect to the embedded portion is close to vertical. The fixtures described in.

  According to the means 4, by providing the retaining projection, it is possible to further prevent the displacement of the fixing tool installed on the installation surface in the removal direction (upward). Furthermore, the fixture installed on the installation surface may tilt or rotate in the installation surface configuration (soil etc.) constituting the installation surface, and the fixture may be easily removed. Can be further prevented. Therefore, the installation state of the fixture can be further stabilized.

  Also, for example, when the sheet-like body installed on a relatively soft ground is stepped on by the operator, the sheet-like body is displaced relative to the fixing tool downward, and the fixing tool is the sheet-like body and the ground It is feared that it will be easy to get out of it. In this respect, when the sheet-like body is displaced downward relative to the fixture by the positioning projection provided at a position closer to the pressing portion than the retaining projection, the sheet-like body is supported by the positioning projection It is designed to prevent further relative displacement. Therefore, it is possible to prevent the situation where the fixing tool comes off from the installation surface.

  Furthermore, the positioning protrusion located closer to the pressing portion than the retaining protrusion has a projection length smaller than that of the retaining protrusion. For this reason, at the stage of relative displacement of the sheet-like body to the lower surface side of the pressing portion at the time of installation of the fixing tool, the situation where the positioning projection interferes with the sheet-like body and displacement of the sheet-like body is inhibited is prevented. be able to. In addition, the positioning protrusion protrudes in such a manner as to open outward (outer peripheral side of the embedded portion) than the retaining protrusion. For this reason, as described above, when the sheet-like body at the peripheral portion of the fixing tool is stepped on by the operator, the sheet-like body is prevented from being displaced relative to the fixing tool downward. It is played more reliably. For this reason, although the positioning protrusion is relatively small, the positioning protrusion is a sheet-like member when the sheet-like body at the peripheral portion of the fixing tool is stepped on by the operator by opening wide as much as possible. As described above, the function and effect of preventing the relative displacement of the sheet-like body downward with respect to the fixture can be achieved more reliably. Further, the positioning projection may be brought into contact with a position as far as possible from the insertion hole formed by inserting the fixing tool in the sheet-like body, and the angle of the positioning projection with respect to the sheet-like body may be relaxed as much as possible. it can. Accordingly, the positioning projection pierces the sheet-like body, penetrates the sheet-like body, or the positioning projection abuts (pierces) near the end portion (peripheral portion of the insertion hole) of the sheet-like body. It is possible to prevent the situation in which the portion between the sheet-like body in which the positioning projection abuts and the insertion hole are torn.

  Note that the retaining protrusion is provided on the tip end side of the embedded portion more than the positioning protrusion, and is disposed at a relatively deep position in a state where the fixing tool is installed on the installation surface, thereby preventing the retaining protrusion The action and effect of the securing of the fixing tool will be more prominent.

  Note that “the positioning projections may be provided in at least one pair at the same position in the longitudinal direction of the embedded portion and at different positions in the circumferential direction of the embedded portion”. In this case, depending on the position at which the sheet-like body around the fixing tool is stepped on, the above-described operational effect of suppressing relative displacement between the sheet-like body and the fixing tool is exhibited or suppressed. be able to.

  Furthermore, "if the plurality of retaining projections are provided, the plurality of retaining projections may be disposed at mutually offset positions in the longitudinal direction of the embedded portion." In this case, when the embedded portion is inserted through the sheet, the plurality of retaining projections are inserted through the sheet simultaneously, thereby forming a relatively large hole (insertion hole) with respect to the sheet. It is possible to suppress situations such as

  In addition, "the pressing portion may have a thick portion in a range including the central portion". In this case, when the holding portion is hammered by a hammer or the like when installing the fixing tool on the ground, the deformation of the holding portion can be prevented, and the force caused by the hammer or the like is transmitted efficiently by the embedded portion. be able to.

It is a side view of a fixing tool. It is a side view of a fixing tool. It is a perspective view of a fixing tool. It is a perspective view of a fixing tool. It is the sectional view on the AA line of FIG. It is the BB sectional drawing of FIG. It is the CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in Fig. 1 etc., a plastic film Pf (so-called multi-sheet etc.) as a sheet is applied to the ground G as the installation surface so as to cover the periphery of the seeds of the crop planted in the field. It is being laid. In addition, the fixing tool 1 for fixing the plastic film Pf to the ground G is connected to the substantially cylindrical embedded portion 2 and one end of the embedded portion 2 and has a substantially disc-like presser larger in diameter than the embedded portion 2 And 3 are provided. In the installation state of the fixture 1, the embedded portion 2 penetrates the plastic film Pf installed on the ground G and is embedded in the ground G, and the pressing portion 3 sandwiches the plastic film Pf with the ground G It has become. The fixing tool 1 of the present embodiment is integrally formed of polyacetal.

  Further, as shown in FIG. 3 and FIG. 7 etc., the embedded portion 2 is a portion on the side to be connected to the pressing portion 3 and has an embedded maintaining portion 4 shaped as if a substantially cylindrical body is cut out. , And a tip end portion of the embedded portion 2 and is configured of a tip end portion 5 whose outer surface is a smooth surface. More specifically, the embedding and retaining portion 4 includes a pair of opposing outer ribs 6 extending along the longitudinal direction of the embedding portion 2 and a connecting rib 8 for connecting between the lateral width direction intermediate positions of the pair of outer ribs 6. And a cross rib 9 extending perpendicularly to the connection rib 8 and an inner rib 7 having a cross shape extending in the longitudinal direction of the embedded portion 2 and having a substantially U-shaped cross section .

  As shown in FIG. 3 and FIG. 5 etc., the embedded portion 2 is configured to gradually decrease in diameter toward the tip end side (the outer shape is configured in a substantially conical shape). Is configured so that the rate of change in diameter reduction is larger than that in the embedding maintenance unit 4, and the rate of change in diameter reduction is particularly large in the tip portion of the tip portion 5 in particular. It has a conical shape.

  In addition, as shown in FIG. 1, FIG. 3, FIG. 7, etc., the embedding and retaining part 4 connects between the cross rib 9 and the outer rib 6 and is orthogonal to the longitudinal direction of the embedding and retaining part 4 A substantially flat partition rib 11 extending in the direction is provided. The partition ribs 11 are provided at a plurality of locations at predetermined distances from each other in the longitudinal direction of the embedding and retaining portion 4. Moreover, as shown in FIG. 7 etc., the outer edge part of the partition rib 11, the outer edge part of the cross rib 9, and the outer surface of the outer side rib 6 are comprised by the cross-sectional circular arc shape, respectively. Furthermore, both ends of the outer edge of each partition rib 11 are connected without any step difference with the end of the outer edge of the cross rib 9 and the end of the outer surface of the outer rib 6, respectively. When the outer edge of the partition rib 11, the outer edge of the cross rib 9, and the outer surface of the outer rib 6 are connected in the cross section of the portion 4, a substantially circular shape is obtained.

  Further, as shown in FIG. 3 and FIG. 8 etc., the embedding and retaining part 4 protrudes from the both sides of the connection rib 8 to the outer peripheral side of the embedding part 2 respectively, and from the pair of outer ribs 6 A V-shaped rib 12 is provided to be inclined toward the end of the embedded portion 2 toward the rib 9. As shown in FIG. 2, FIG. 3, FIG. 6, etc., the V-shaped rib 12 protrudes to the outer peripheral side of the embedded portion 2 more than the cross rib 9. Furthermore, the V-shaped rib 12 is configured to be connected also to the outer end edge of the cross rib 9.

  In the present embodiment, as shown in FIG. 7 (FIG. 8), in the cross section of the embedding and retaining portion 4, a crossing portion 13 between the connecting rib 8 and the crossing rib 9 in the outer edge portion of the V-shaped rib 12 (in this example , A portion most distant from the center of the cross section of the inner rib 7 and the intersection 13 is a portion of the outer surface of the outer rib 6 most distant from the intersection 13 and an intersection It is configured to be longer than the distance between 13. In particular, in the present embodiment, as described above, the outer peripheral shape of the embedding and retaining portion 4 has a substantially circular shape in cross section, and the V-shaped rib 12 and the V-shaped rib 12 in the longitudinal direction of the embedding portion 2 The outer edge of the cross rib 9 at the same position and the outer surface of the outer rib 6 are more likely to project to the outer peripheral side of the embedded portion 2 than a virtual substantially circular shape partially constituted.

  In addition, as shown in FIG. 2 and FIG. 8 etc., the V-shaped rib 12 and the dividing rib 11 of the present embodiment are paired on both sides of the connecting rib 8 (the connecting rib 8 One provided on one side and the other provided on the other side are provided so as to be symmetrical about the connecting rib 8). In addition, in the longitudinal direction of the embedding and retaining portion 4, the V-shaped ribs 12 are provided at three locations, and the partition ribs 11 are provided at eight locations. As shown in FIG. 1 and the like, in the present embodiment, the V-shaped rib 12 is provided at a position closer to the distal end forming portion 5 than the partition rib 11, and two partitions are provided between the V-shaped ribs 12. Ribs 11 are provided, and four partition ribs 11 are provided between the V-shaped rib 12 and the pressing portion 3.

  Further, as shown in FIG. 2 and FIG. 4 etc., an auxiliary for connecting between the tip end edge of the V-shaped rib 12 which is the end portion on the tip end side of the embedded portion 2 and the outer end edge of the cross rib 9 Ribs 14 are provided. The auxiliary rib 14 is configured such that the protruding length from the tip end edge of the V-shaped rib 12 becomes gradually shorter from the outer edge of the cross rib 9 toward the outer peripheral side of the embedded portion 2.

  Furthermore, as shown in FIG. 2, FIG. 4, etc., crossing from the position on the side of the pressing portion 3 to the pressing portion 3 in the embedding maintaining portion 4 slightly from the longitudinal direction central portion of the embedding maintaining portion 4 A reinforcing portion 15 is provided so as to extend the rib 9 to the outer peripheral side of the embedded portion 2. That is, the reinforcing portion 15 extends along the longitudinal direction of the embedded portion 2 and is connected to the pressing portion 3. Further, the reinforcing portion 15 is further outward than the outer peripheral surface of the embedding maintaining portion 4 having a substantially regular circular shape in cross section which is constituted by the outer edge of the partition rib 11, the outer edge of the cross rib 9, and the outer surface of the outer rib 6 It protrudes in the outer peripheral side of the embedding | flush-mounting part 2, and it is comprised so that the projection length from the cross rib 9 may become large gradually toward the holding part 3 side from the longitudinal direction center part side of the embedding | maintenance holding part 4. FIG. In addition, as shown in FIG. 8 and the like, the protrusion length from the embedding and retaining portion 4 at the end of the reinforcing portion 15 on the side of the pressing portion 3 is greater than the protrusion length from the embedding and retaining portion 4 of the V-shaped rib 12 It is getting bigger.

  Further, as shown in FIG. 1, FIG. 3, FIG. 5, etc., a retaining projection 16 which projects from the outer rib 6 toward the outer peripheral side of the embedded portion 2 in an inclined manner toward the pressing portion 3; It has a positioning protrusion 17 that protrudes from the outer rib 6 toward the outer peripheral side of the embedded portion 2 at a position closer to the pressing portion 3 on the pressing portion 3 side than the portion where the retaining projection 16 is provided. ing. The retaining projections 16 are provided three by three at each of the pair of outer ribs 6 at a predetermined distance apart from each other. As shown to FIG. 3, FIG. 4, the surface at the side of the front-end | tip part of the embedding | flush-mounting part 2 among the securing protrusion 16 has comprised curved shape. Further, as shown in FIG. 5 and the like, the direction and shape of the protrusion of the retaining projection 16 provided in each outer rib 6 are substantially the same (the retaining projection 16 on the tip end side of the embedded portion 2 is slightly Open outwards and slightly larger).

  Furthermore, in the present embodiment, the position of the root of the retaining projection 16 provided on one of the pair of outer ribs 6 and the position of the root of the retaining projection 16 provided on the other They are offset in the longitudinal direction of the embedded portion 2. More specifically, as shown in FIG. 1, the retaining projection 16 provided on one outer rib 6 of the pair of outer ribs 6 is used to press the V-shaped rib 12 of the outer ribs 6. The retaining projection 16 provided on the other outer rib 6 protrudes from a portion connected to the partition rib 11 provided adjacent to the part 3 side, and the one outer rib 6 of the outer ribs 6 It protrudes from the site | part connected with the partition rib 11 provided next to the partition rib 11 corresponding to. In addition, since the retaining protrusion 16 protrudes from the portion of the outer rib 6 connected to the partition rib 11, the strength of the peripheral portion of the root portion of the retaining protrusion 16 is enhanced, and deformation and damage are caused. The effects such as suppression of etc. are exhibited.

  In addition, as shown in FIG. 1, FIG. 3, FIG. 5, etc., the positioning projections 17 are provided in a pair so as to protrude from the pair of outer ribs 6, respectively. Furthermore, the pair of positioning projections 17 are provided at the same position in the longitudinal direction of the embedded portion 2. Further, the positioning projection 17 is configured so that the projection length is smaller than that of the retaining projection 16 and the angle with respect to the embedded portion 2 is close to perpendicular. That is, the length from the root to the tip of the positioning projection 17 is shorter than the root to the tip of the retaining projection 16 and the distance between the tip of the positioning projection 17 and the outer rib 6 Is shorter than the distance between the tip of the retaining projection 16 and the outer rib 6, but the distance from the outer rib 6 of the tip of the positioning projection 17 and the retaining projection 16 The difference in the distance from the outer rib 6 at the tip end portion is smaller than the difference in the length of the positioning protrusion 17 and the retaining protrusion 16.

  Further, as shown in FIGS. 3 and 8 etc., in the present embodiment, the center position of the retaining projection 16 and the positioning projection 17 and the center position of the reinforcing portion 15 in the circumferential direction of the embedded portion 2 And the protruding portion 16 in the inner and outer peripheral direction of the embedded portion 2 and the protruding direction of the positioning projection 17 from the embedded portion 2 and the embedded portion 2 of the reinforcing portion 15. Also in the direction of protrusion from the frame, they are configured to extend in directions orthogonal to each other. In addition, as shown in FIG. 1 and FIG. 5, the distance between the tip of the retaining projection 16 and the positioning projection 17 and the outer rib 6 is the outer peripheral portion of the pressing portion 3 and the embedded portion It is shorter than a half of the distance between two. Furthermore, when the fixing tool 1 is viewed from the side as shown in FIG. 1, the pressing portion 3 is configured to be positioned on the extension of the direction in which the positioning protrusion 17 protrudes from the embedded portion 2.

  In addition, as shown in FIG. 3 and the like, the pressing portion 3 is a surface opposite to the surface (rear surface) to which the embedded portion 2 is connected, and is a surface exposed upward in the installed state of the fixture 1 On the front surface side, the reinforcement convex part 18 which protrudes upwards from the range including the center part of the holding part 3 is provided, and as the holding part 3, the part where the reinforcement convex part 18 is provided is a thick part It has become. The outer peripheral shape of the reinforcing convex portion 18 is a concentric circle which is slightly smaller than the outer peripheral shape of the pressing portion 3 in a plan view.

  Further, as shown in FIGS. 4 and 8, the back surface side of the pressing portion 3 extends along the direction in which the cross rib 9 protrudes from the connection rib 8 so as to pass through the central portion of the pressing portion 3. A protrusion 19 is provided. In the present embodiment, the cross rib 9 and the reinforcing portion 15 are connected to the rear surface side ridge portion 19. In addition, as shown in FIG. 1, when the fixing tool 1 is viewed in a direction in which the connecting rib 8 is in the front, the pressing portion 3 is slightly curved so that the central portion is positioned upward with respect to both sides. As shown in FIG. 2, when the fixture 1 is viewed in the direction in which the outer rib 6 is in the front direction, the pressing portion 3 is slightly curved so that the central portion is positioned downward with respect to the both sides. There is.

  As described above in detail, according to the present embodiment, the embedded portion 2 of the fixing device 1 includes the pair of outer ribs 6 and the inner rib 7 connecting the pair of outer ribs 6 to each other. A letter-shaped embedding and holding unit 4 is provided. The embedding and retaining portion 4 further includes a partition rib 11 which connects the outer rib 6 and the inner rib 7 and extends in a direction perpendicular to the longitudinal direction of the embedding portion 2. Furthermore, the embedded portion 2 protrudes from the both side surfaces of the connection rib 8 to the outer peripheral side of the embedded portion 2 corresponding to the embedding and retaining portion 4 and from the pair of outer ribs 6 to the cross rib 9 located therebetween It is provided with a V-shaped rib 12 which extends obliquely to the tip end side of the embedded portion 2. In addition, the partition rib 11 forms a substantially circular shape with the outer surface of the outer rib 6 and the outer edge of the cross rib 9, while the V-shaped rib 12 forms the cross rib 9 It projects to the outer peripheral side of the embedded portion 2 more than the substantially circular shape), and is also connected to the outer end edge of the cross rib 9.

  For this reason, when the fixture 1 is installed on the ground G, the soil as the installation surface structure constituting the ground G is the inner rib 7 of the embedded portion 2, the outer rib 6, the partition rib 11, and V It enters into the area surrounded by the letter rib 12. That is, as the fixing tool 1 itself, the embedded section 2 (embedding maintenance section 4) is appropriately shaped like a cross-shaped substantially king-like shape, and weight saving, resource saving, etc. are achieved. On the other hand, when removing the fixture 1 installed on the ground G from the ground G, it is necessary to lift together the soil that has entered the inside of the embedding and retaining unit 4. In particular, the V-shaped rib 12 protrudes to the outer peripheral side of the embedded portion 2 more than the cross rib 9, and when removing the fixture 1 from the ground G, the V-shaped rib 12 is positioned above the protruding portion of the V-shaped rib 12. The V-shaped rib 12 needs to push back the soil to be removed. Therefore, it is possible to efficiently add the weight (resistance in the removal direction) of the fixture 1 installed on the ground G using soil, and to stabilize the installation state of the fixture 1 etc. Can. As a result, the fixture 1 can be used to further stabilize the laying state of the plastic film Pf.

  Furthermore, the V-shaped rib 12 is configured to be thinner toward the tip end side of the embedded portion 2. For this reason, when installing the fixture 1 on the ground G (compared to the case where the V-shaped rib 12 extends orthogonal to the longitudinal direction of the embedded portion 2), the V-shaped rib 12 is used as the ground G It can be inserted relatively easily. Therefore, even in the case of providing the V-shaped rib 12 which protrudes to the outer peripheral side of the embedded portion 2 more than the cross rib 9, it is possible to suppress the decrease in the installation workability of the fixing tool 1. In addition, the upper surface of the V-shaped rib 12 in the installation state of the fixture 1 more reliably receives the soil located above it (the soil located above the V-shaped rib 12 is the V-shaped rib 12 Since the shape is difficult to escape to both sides), it is possible to more reliably prevent the relative displacement of the V-shaped rib 12 (the embedded portion 2) upward. Therefore, the effect of achieving stabilization and the like of the installation state of the fixing tool 1 is further achieved.

  In addition, the V-shaped rib 12 includes the cross rib 9 and the outer rib 6 (the outer edge of the cross rib 9 at the same position as the V-shaped rib 12 in the longitudinal direction of the embedded portion 2 and the outer surface of the outer rib 6 It protrudes to the outer peripheral side of the embedding | flush-mounting part 2 rather than the virtual substantially-circular shape by which one part is comprised. For this reason, it is possible to suppress the rotational displacement and tilting displacement of the embedded portion 2 embedded in the ground G by the V-shaped rib 12 protruding from the embedded portion 2 to the outer peripheral side. Therefore, it is possible to suppress a situation in which the fixing tool 1 is easily removed due to the displacement of the embedded portion 2.

  In addition, an auxiliary rib 14 is provided to connect between the tip edge of the V-shaped rib 12 which is the edge on the tip end side of the embedded portion 2 and the outer end edge of the cross rib 9. From the outer end edge of the cross rib 9 toward the outer peripheral side of the embedded portion 2, the protruding length from the tip end edge of the V-shaped rib 12 is gradually shortened. For this reason, when the fixture 1 is installed on the ground G, when the V-shaped rib 12 penetrates the plastic film Pf or is embedded in the ground G, the fixture 1 of the V-shaped ribs 12 is used. When the plastic film Pf and the soil of the ground G come into contact with the edge (tip edge) in the direction of embedding on the ground G of the plastic, the plastic film Pf and, by the inclination of the auxiliary rib 14 The soil is guided in the outer peripheral direction of the embedded portion 2. Therefore, the V-shaped rib 12 can be relatively smoothly inserted and inserted into the plastic film Pf and the ground G, and the installation workability of the fixing tool 1 can be improved. In particular, with regard to the plastic film Pf, the plastic film Pf is relatively largely broken when the V-shaped rib 12 is inserted, or the V-shaped rib 12 is not properly inserted into the plastic film Pf, and the V-shaped The rib 12 can prevent the plastic film Pf from being buried in the ground.

  The auxiliary rib 14 can reinforce the connecting portion between the end edge of the V-shaped rib 12 and the cross rib 9 and can be installed at the time of installation of the fixture 1, at the time of recovery, or from the ground G by the plastic film Pf. When a force is applied in the direction of coming off, it is possible to prevent the V-shaped rib 12 from being broken at the root portion or the like.

  Furthermore, in the portion on the side of the pressing portion 3 in the embedding maintaining portion 4, the cross rib 9 is provided so as to extend to the outer peripheral side of the embedding portion 2, and the reinforcing portion 15 connected to the pressing portion 3 is provided. . By providing the reinforcing portion 15, the embedded portion 2 and the pressing portion 3 can be connected more firmly. Therefore, it is possible to prevent a situation in which the holding portion 3 is inclined relative to the embedded portion 2 to be deformed or damaged. Further, by providing the reinforcing portion 15, the strength and rigidity of the pressing portion 3 can be enhanced. Therefore, for example, when installing the fixing tool 1 on the ground G, the pressing unit 3 is hit by a hammer or the like, or when the pressing unit 3 is stepped on by the worker in the installation state of the fixing tool 1, It is possible to prevent a situation in which the pressing portion 3 is deformed or damaged. Furthermore, when the holding portion 3 is hammered by a hammer or the like when installing the fixing tool 1 on the ground G, the deformation caused by the hammer or the like is embedded as the deformation of the holding portion 3 itself is suppressed. 2 can be transmitted more efficiently. Therefore, the installation workability of the fixing tool 1 can be improved.

  In particular, as in the present embodiment, the reinforcing portion 15 is protruded to the outer peripheral side of the embedded portion 2 more than the virtual rib that is formed by the cross rib 9 (the outer edge portion of the cross rib 9 and the outer surface of the outer rib 6). By connecting the holding portion 3 to the holding portion 3, the effects such as connecting the embedded portion 2 and the holding portion 3 more firmly, preventing deformation of the holding portion 3, and the like are more significantly exhibited. It becomes. Furthermore, the strength (rigidity) of the portion where the outer rib 6 is not provided can be effectively enhanced in the connection portion between the embedding and retaining portion 4 and the pressing portion 3 by the reinforcing portion 15.

  In addition, a retaining projection 16 which protrudes from the outer rib 6 toward the outer peripheral side of the embedded portion 2 toward the pressing portion 3 side, and a portion of the embedded portion 2 where the projecting portion 16 is provided. A positioning projection 17 is provided on the side of the pressing portion 3 so as to project obliquely from the outer rib 6 toward the outer peripheral side of the embedded portion 2 toward the pressing portion 3. Furthermore, the positioning projection 17 is configured so that the projection length is smaller than that of the retaining projection 16 and the angle with respect to the embedded portion 2 is close to perpendicular. Thus, the displacement of the fixing tool 1 installed on the ground G in the removal direction (upward) can be further prevented by providing the retaining projection 16. Furthermore, the fixture 1 installed on the ground G is further prevented from being inclined or rotated in the soil constituting the ground G, and the fixture 1 is easily removed. be able to. Therefore, the installation state of the fixing tool 1 can be further stabilized.

  Also, for example, when the plastic film Pf installed on the relatively soft ground G is stepped on by the operator, the plastic film Pf is displaced relative to the fixture 1 downward, and the fixture 1 is a plastic film There is a concern that it will be easy to get out of Pf and the ground G. In this respect, when the plastic film Pf is displaced downward relative to the fixture 1 by the positioning protrusion 17 provided at a position closer to the pressing portion 3 than the retaining protrusion 16, the plastic film Pf is positioned It is supported by (hooked on) the projection 17 so that further relative displacement is prevented. Therefore, it is possible to prevent the situation in which the fixing tool 1 comes off the ground G.

  Further, the positioning protrusion 17 positioned closer to the pressing portion 3 than the retaining protrusion 16 has a protruding length smaller than that of the retaining protrusion 16. Therefore, when the plastic film Pf is relatively displaced to the lower surface side of the pressing portion 3 when installing the fixing tool 1, the positioning projection 17 interferes with the plastic film Pf and the displacement of the plastic film Pf is inhibited. Can be prevented. In addition, the positioning protrusion 17 protrudes in such a manner as to open outward more than the retaining protrusion 16. For this reason, although the positioning protrusion 17 is relatively small, the positioning protrusion 17 is opened when the plastic film Pf in the peripheral portion of the fixing tool 1 is stepped on by the operator or the like by widening outward as much as possible. The plastic film Pf can be easily made to abut, and as described above, the function and effect of preventing the plastic film Pf from being displaced downward relative to the fixture 1 can be more reliably exhibited. Further, the positioning projection 17 is brought into contact with the plastic film Pf at a position as far as possible from the insertion hole formed by the fixing tool 1 being inserted, and the angle of the positioning projection 17 with respect to the plastic film Pf is relaxed as much as possible. can do. Accordingly, the positioning projection 17 pierces the plastic film Pf, penetrates the plastic film Pf, or the positioning projection 17 abuts (pierces) the end (peripheral portion of the insertion hole) of the plastic film Pf. It is possible to suppress a situation in which the contact state is easily released, or a break between a portion of the plastic film Pf in contact with the positioning protrusion 17 and the insertion hole can be suppressed.

  The securing projection 16 is provided below the positioning projection 17 and is disposed at a relatively deep position in the installation state of the fixing tool 1 on the ground G, whereby the fixing tool 1 by the retaining projection 16 is provided. The action and effect of the retention of the

  Further, the positioning projections 17 are provided at the same position in the longitudinal direction of the embedded portion 2 and at opposite positions in the circumferential direction of the embedded portion 2. Therefore, depending on the position at which the plastic film Pf around the fixing tool 1 is stepped on, the above-described operation effect of suppressing the relative displacement between the plastic film Pf and the fixing tool 1 is exhibited or not exhibited. It can be suppressed.

  Furthermore, a plurality of retaining projections 16 provided at a plurality of the embedded portions 2 are provided at mutually offset positions in the longitudinal direction of the embedded portion 2. Therefore, when the embedded portion 2 is inserted into the plastic film Pf, the plurality of retaining projections 16 are simultaneously inserted into the plastic film Pf, whereby a relatively large hole (insertion hole) with respect to the plastic film Pf is formed. It is possible to suppress the situation of being formed.

  In addition, the pressing portion 3 includes the reinforcing convex portion 18 in a portion including the central portion in a plan view, and the portion provided with the reinforcing convex portion 18 is a thick portion. For this reason, when the holding portion 3 is hammered by a hammer or the like when installing the fixing tool 1 on the ground G, deformation of the holding portion 3 can be prevented, and the force due to the hammering or the like is embedded into the embedded portion 2 Can communicate more efficiently.

  Further, the direction in which the V-shaped rib 12 protrudes from the embedded portion 2 and the direction in which the retaining projection 16 protrudes from the embedded portion 2 intersect (orthogonal). For this reason, by providing the V-shaped rib 12 and the retaining projection 16, the function and effect of making the fixing tool 1 in a state of being installed on the ground G difficult to be removed from the ground G can be exhibited more effectively. .

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other applications and modifications not illustrated below are naturally possible.

  (A) In the above embodiment, the shape of the V-shaped rib 12 is not limited to a configuration in which it extends obliquely and linearly between the outer rib 6 and the cross rib 9 and is curved. It may extend (for example, it may be substantially U-shaped in side view). Further, for example, the number and the arrangement of the V-shaped ribs 12 are not particularly limited, and for example, only a pair may be provided in the lower part of the embedded portion 2. Furthermore, for example, V-shaped ribs 12 may be provided at a plurality of locations in the longitudinal direction of the embedded portion 2 so as to be displaced from each other in the circumferential direction of the embedded portion 2. In this case, the ease of embedding of the embedded portion 2 is reduced, while the difficulty of removal is improved.

  (B) In the above embodiment, in the cross section of the embedding and retaining portion 4, the outer edge of the partition rib 11, the outer edge of the cross rib 9, and the outer surface of the outer rib 6 are configured to form a substantially circular shape. However, for example, a substantially elliptical shape or a substantially rectangular shape may be formed. Further, in the above embodiment, it is assumed that the V-shaped rib 12 is constituted by the outer edge portion of the cross rib 9 at the same position as the V-shaped rib 12 in the longitudinal direction of the embedded portion 2 and the outer surface of the outer rib 6 It is configured to project to the outer peripheral side more than the substantially regular circle shape, but it may be projected to the outside more than at least the cross rib 9. In particular, of the outer edge portion of the cross rib 9 at the same position as the V-shaped rib 12 in the longitudinal direction of the embedded portion 2 and the outer portion of the outer rib 6, the V-shaped rib 12 crosses the cross portion 13 of the inner rib 7. The distance between the outer edge of the V-shaped rib 12 and the intersection 13 is larger than the distance between the intersection 13 and the portion most distant from the V-shaped rib. As a result, the effect of making it easy to hold the posture of the embedded portion 2 in the ground can be more remarkably exhibited.

  (C) In the above embodiment, the number and arrangement of the retaining projections 16, the positioning projections 17, and the reinforcing portions 15 are not particularly limited, and can be changed as appropriate. Provided that the retaining projection 16 protrudes from the embedded portion 2 to the outer peripheral side (outer outer peripheral side than a virtual substantially circular shape formed by the outer edge portion of the cross rib 9 and the outer surface of the outer rib 6) For example, it may be provided in the tip end portion 5. The positioning protrusion 17 may be provided on the side of the holding portion 3 with respect to the retaining protrusion 16 in the embedding maintaining portion 4, and the positioning protrusion 17 is offset from the retaining protrusion 16 in the circumferential direction of the embedding portion 2. It is also good. Further, instead of or in addition to the configuration in which the reinforcing portion 15 extends the cross rib 9 to the outer peripheral side of the embedded portion 2, the reinforcing portion 15 protruding from the outer rib 6 may be provided. In addition, it is also possible to omit the retaining projection 16, the positioning projection 17, and the reinforcing portion 15. Furthermore, the auxiliary rib 14 and the partition rib 11 can be omitted.

  Further, in the embedded portion 2 of the above embodiment, the outer peripheral surface of the distal end constituting portion 5 is formed as a smooth surface, but in the embedded portion 2, the connecting portion with the pressing portion 3 to the distal end portion or near the distal end portion The part up to the part may be configured as the embedding and retaining part 4 having a V-shaped cross section. Furthermore, the distal end of the embedded portion 2 may not have a sharp shape (substantially conical shape), and may have, for example, a truncated cone shape.

  (D) The fixing tool 1 of the above embodiment fixes a plastic film Pf (for example, polyvinyl chloride, polyethylene, polyolefin, etc. configured in a thin plate shape) laid on the ground G of a field to assist the growth of agricultural products. For example, a sheet-like body (so-called, a vegetation sheet, a vegetation mat, such as a sheet-like non-woven fabric equipped with seeds and fertilizer, biodegradable, etc.) laid on the ground for greening It may be embodied as fixing plastic etc.) on the ground. Moreover, it is not limited to the ground G also as an installation surface to which the fixing tool 1 is fixed, For example, what (for example, sponge etc.) which can be fixed by embedding (inserting) the fixing tool 1 may be sufficient.

  (E) In the above embodiment, the fixing device 1 is made of polyacetal, but may be made of other resin materials such as polypropylene, polyethylene, ABS, PET, polyamide, biodegradable plastic and the like.

  DESCRIPTION OF SYMBOLS 1 ... Fixing-tool, 2 ... embedded part, 3 ... holding part, 4 ... embedding maintenance part, 6 ... outer side rib, 7 ... inner side rib, 8 ... connection rib, 9 ... cross | intersection rib, 12 ... V-shaped rib, 13 ... Crossing part, 14 ... auxiliary rib, 15 ... reinforcing part, 16 ... retaining projection, 17 ... positioning projection, G ... ground, Pf ... plastic film.

Claims (4)

A substantially rod-like embedded portion, and a pressing portion connected to one end of the embedded portion and having a diameter larger than that of the embedded portion;
In the fixture, the embedded portion penetrates the sheet-like body installed in the installation surface and is embedded in the installation surface, and the pressing portion sandwiches the sheet-like body with the installation surface.
The embedding unit is
A pair of opposing outer ribs extending along the longitudinal direction of the embedded portion;
A connecting rib connecting between the widthwise middle positions of the pair of outer ribs, and a cross rib extending intersecting with the connecting rib, and having a cross-shaped cross section extending along the longitudinal direction of the embedded portion An embedding and retaining portion having an inner rib and having a substantially U-shaped cross section is provided in a range including at least a connecting portion with the pressing portion,
The embedding and retaining part protrudes from the both side surfaces of the connection rib to the outer peripheral side of the embedding part, and from the pair of outer ribs toward the intersecting rib positioned therebetween, the retaining part of the embedding part is pressed A V-shaped rib extending obliquely to the tip end side which is the end on the side where the parts are not connected,
The fixture according to claim 1, wherein the V-shaped rib protrudes to an outer peripheral side of the embedded portion more than the cross rib and is also connected to an outer edge of the cross rib. There is provided an auxiliary rib connecting between a tip end edge of the V-shaped rib which is an edge portion on the tip end side of the embedded portion and an outer end edge of the cross rib,
The auxiliary rib is characterized in that the protruding length from the tip end edge of the V-shaped rib is gradually shortened from the outer edge of the cross rib toward the outer peripheral side of the embedded portion. The fixture according to item 1. And a reinforcing portion that protrudes from the inner rib or the outer rib toward the outer periphery of the embedded portion, extends along the longitudinal direction of the embedded portion, and is connected to the pressing portion.
In a cross section of a portion near the end portion on the side connected to the pressing portion in the embedded portion, the distance from the intersection of the connection rib and the intersection rib to the outer edge portion of the reinforcing portion is The fixture according to claim 1, wherein the fixing device is configured to be longer than a distance between a portion of the outer surface most distant from the intersection and the intersection. A locking projection projecting obliquely from the inner rib or the outer rib toward the outer peripheral side of the embedded portion toward the pressing portion;
In the embedded portion, the inner rib or the outer rib is inclined toward the outer peripheral side of the embedded portion toward the outer peripheral side on the pressing portion side with respect to the portion where the retaining projection is provided. And a positioning projection that
The projection according to any one of claims 1 to 3, wherein the positioning projection is configured such that the projection length is smaller than that of the retaining projection and the angle with respect to the embedded portion is close to vertical. The fixtures described in.

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