Support pipe subsidence prevention device

Abstract

To provide a sinking prevention device that can be easily attached to a support pipe after being inserted into the ground and installed.SOLUTION: A sinking prevention device 1 consists of a pair of first and second structures 11 and 12 of the same shape. Since a support pipe P is held between support cylinder forming portions 31 of the first and second structures 11 and 12 which are fixed to the support pipe P with a drill screw 6, attachment to the support pipe P after the support pipe P is inserted into the ground is easy. Since the first and second structures 11 and 12 are the same shape, management thereof is easy. In addition, fitting of fitting concave parts 21d and 41c with fitting convex parts 21b and 41b and snap engagement between engagement claws 21c and concave engagement parts 21e make the connection strong and do not easily deform even under load.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a subsidence prevention device for a support pipe that is used as a support for agricultural equipment, etc., with its lower end inserted into the ground and standing upright. [Background technology]

[0002] Conventionally, the support pipes that support agricultural equipment such as vinyl greenhouses and artificial culture media stands for elevated cultivation are inserted at their lower ends into the ground to stand upright. However, on soft ground, the support pipes sink into the ground due to the load after the equipment is constructed, so a dish-shaped anti-subsidence device is fixed to the bottom. A known example of a subsidence prevention fitting is disclosed in Non-Patent Document 1. This subsidence prevention fitting is made by pressing a metal plate, and has a disk-shaped body with a through-hole in the center, around which an upward-standing piece is formed. A drill screw is screwed diagonally horizontally into this standing piece to fix it to the support pipe. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] Kaga Iron Works Co., Ltd. Homepage<http: / / kaga-tekkousho.co.jp / service.html> ,Product List, "Subsidence Prevention Fittings (Base Plate)", [online], Searched on January 31, 2022, Internet chrome-extension: / / efaidnbmnnnibpcajpcglclefindmkaj / viewer.html?pdfurl=http%3A%2F%2Fkaga-tekkousho.co.jp%2Fpdf20190523%2F22tinnkabousikanagu.pdf&clen=127969&chunk=true Summary of the Invention [Problem to be solved by the invention]

[0004] The above-mentioned conventional anti-subsidence fittings are attached by penetrating the support pole before inserting it into the ground during installation of the equipment. Therefore, if the support pole subsides after installation and an anti-subsidence fitting is to be attached later to stop the subsidence, the support pole must be pulled out. Therefore, an object of the present invention is to provide a subsidence prevention device that can be easily attached to a support pole after the installation of the equipment. [Means for solving the problem]

[0005] In the following description, reference will be made to the reference numerals in the accompanying drawings, but the present invention is not limited thereto. The subsidence prevention device 1 of the present invention, which solves the above-mentioned problems, comprises a disk-shaped ground plate 2 having a horizontal bottom surface 2a that contacts the ground, a cylindrical support tube 3 that rises from the center of the ground plate 2 and through which a support pipe P is inserted, and a pair of ribs 4 that connect the support tube 3 to the ground plate 2 and are provided on radially opposing portions of the support tube 3, and is made of a pair of identical, connectable and separable synthetic resin first and second components 11, 12. The first and second components 11, 12 are shaped by dividing the ground plate 2, support tube 3, and rib 4 into two at the center of the thickness of the rib 4 along a plane perpendicular to the horizontal bottom surface 2a, and comprise a semidisc-shaped ground plate forming portion 21 having joining planes 21a, 31a, 41a that butt together when connected, a semicylindrical support tube forming portion 31, and a pair of rib forming portions 41. The joining surface 21a of the ground plate forming portion 21 in the first component 11 is provided with a fitting protrusion 21b and a snap-engagement claw 21c on one half surface, and with a fitting recess 21d and a snap-engagement recess 21e on the other half surface. The joining surface 41a of one rib forming portion 41 is provided with a fitting protrusion 41b, and the joining surface 41a of the other rib forming portion 41 is provided with a fitting recess 41c. The support cylinder forming portion 31 is provided with a screw insertion hole 31b in a direction perpendicular to the axis. The second component 12 has the same shape as the first component 11 and is configured to be connectable to the first component 11 by butting the joining surfaces 21a, 31a, and 41a together, fitting the fitting protrusions 21b and 41b with the fitting recesses 21d and 41c, and snap-engaging the engagement claws 21c with the engagement recess 21e. The support pipe P is held between the support tube forming portions 31 of the first and second constituent bodies 11 and 12 and is fixed to the support pipe P by a drill screw 6 which is screwed into the threaded hole 31b. [Effects of the Invention]

[0006] According to the present invention, the support pipe P is held between the support tube forming portions 31 of the first and second constituent bodies 11, 12 and fixed to the support pipe P with the drill screws 6, so that after the support pipe P is inserted into the ground and installed, it can be easily attached to the support P afterwards. Since the first and second constituent bodies 11, 12 have the same shape, they are easy to manage, and the mutual connection is strong due to the fit between the fitting convex portions 21b, 41b and the fitting concave portions 21d, 41c and the snap fit between the engaging claws 21c and the engaging concave portions 21e, so they do not easily deform even when subjected to a load. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view of a subsidence prevention device according to the present invention. [Figure 2] FIG. 2 is a perspective view of the structure of the anti-subsidence device of FIG. 1. [Figure 3] FIG. 2 is a front view of the subsidence prevention device component of FIG. 1. [Figure 4] FIG. 2 is a side view of the anti-subsidence device component of FIG. 1. [Figure 5] FIG. 2 is a plan view of the structure of the anti-subsidence device of FIG. 1. [Figure 6] FIG. 2 is a bottom view of the anti-subsidence device component of FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a subsidence prevention device 1 is attached to a support pipe P, the lower part of which is inserted into the ground.

[0009] The subsidence prevention device 1 comprises a disk-shaped ground plate portion 2 having a horizontal bottom surface 2a that contacts the ground, a cylindrical support tube portion 3 that rises from the center of the ground plate portion 2 and through which a support pipe P is inserted, and a pair of ribs 4 and a plurality of other ribs 5 that are provided on radially opposing portions of the support tube portion 3 and connect the support tube portion 3 and the ground plate portion 2. The subsidence prevention device 1 is fixed to the support pipe P at the support tube portion 3 with two drill screws 6.

[0010] The subsidence prevention device 1 comprises a pair of identical, connectable and separable first and second structural bodies 11 and 12 made of synthetic resin.

[0011] The first and second constituent bodies 11, 12 have a shape in which the ground plate portion 2, the support cylinder portion 3 and the rib 4 are divided into two at the center of the thickness of the rib along a plane perpendicular to the horizontal bottom surface 2a.

[0012] As clearly shown in Figures 2 to 6, the first and second components 11, 12 each include a semi-disc-shaped ground plate forming portion 21 having joining planes 21a, 31a, 41a that butt together when joined, a semi-cylindrical support tube forming portion 31, a pair of rib forming portions 41, and two other ribs 5.

[0013] The joining surface 21a of the ground plate forming portion 21 of the first component 11 is provided with a mating protrusion 21b and a snap engagement claw 21c on one half surface, and a mating recess 21d and a snap engagement recess 21e on the other half surface. The mating protrusion 21b and the mating recess 21d have an uneven shape that allows them to fit tightly together. The snap engagement claw 21c and the snap engagement recess 21e have a female-male shape that allows them to engage with each other. In addition, the ground plate forming portion 21 has an anchor pin insertion hole 21f formed perpendicular to the horizontal bottom surface 2a.

[0014] A mating protrusion 41b is provided on the joining plane 41a of one rib forming portion 41, and a mating recess 41c is provided on the joining plane 41a of the other rib forming portion 41. The mating protrusion 41b and the mating recess 41c have concave and convex shapes that allow them to fit tightly together.

[0015] The support cylinder forming portion 31 is provided with a screw insertion hole 31b in a direction perpendicular to the axis for inserting the drive screw 6 therethrough.

[0016] The second component 12 has the same shape as the first component 11. The second component 12 is joined to the first component 11 by butting together the respective joining flat surfaces 21a, 31a, 41a, engaging the mating protrusion 21b with the mating recess 21d, and snap-engaging the engaging claw 21c with the engaging recess 21e.

[0017] As shown in Figure 1, the subsidence prevention device 1 is fixed to the support pipe P held between the support tube forming portions 31 of the first and second constituent bodies 11 and 12 by a drill screw 6 that is screwed into the support pipe P through a screw hole 31b.

[0018] When attaching the subsidence prevention device 1 to a support pipe P that has already been installed with its lower portion inserted into the ground, the first and second components 11, 12 are butted together across an appropriate position of the support pipe P, and the fitting concave and convex portions 21b, 21d, 41b, 41c are fitted together, and the snap-fit ​​claws 21c are engaged with the snap-fit ​​recesses 21e to form a single unit, thereby forming the subsidence prevention device 1. Next, the subsidence prevention device 1 is moved on the support pipe P to the desired fixed position, and the drill screws 6 are threaded into the support pipe P through the screw insertion holes 31b to secure it. By fitting the fitting concave and convex portions 21b, 21d, 41b, 41c together, the pair of connected components 11, 12 are firmly integrated without twisting or misalignment. [Explanation of symbols]

[0019] 1 Subsidence prevention device 2 Ground plate part 21 Ground plate forming part 21a Joint plane 21b fitting protrusion 21c Snap engagement claw 21d Mating recess 21e Snap engagement recess 3 Support cylinder part 31 Support cylinder forming part 31a Joint plane 31b Screw insertion hole 4. Ribs 41 Rib forming section 41a Joint plane 41b fitting protrusion 41c Fitting recess 5. Ribs 6 drill screws

Claims

1. A subsidence prevention device attached to a support pipe whose lower part is inserted into the ground, The support structure comprises a disk-shaped ground plate having a horizontal bottom surface that contacts the ground, a cylindrical support tube that rises from the center of the ground plate and through which the support pipe is inserted, and a pair of ribs that connect the support tube and the ground plate and are provided on radially opposing portions of the support tube, the support structure comprising a pair of identical, connectable and separable first and second components made of synthetic resin; The first and second components each have a shape obtained by dividing the ground plate portion, the support cylinder portion, and the rib in two at the center of the thickness of the rib along a plane perpendicular to the horizontal bottom surface, and each component comprises a semi-disc-shaped ground plate forming portion having a joining plane that butts together when coupled, a semi-cylindrical support cylinder forming portion, and a pair of rib forming portions; a mating projection and a snap-engagement claw are provided on one half of a joining surface of the ground plate forming portion of the first component, and a mating recess and a snap-engagement recess are provided on the other half of the joining surface of the ground plate forming portion; a mating projection is provided on a joining surface of one of the rib forming portions, and a mating recess is provided on a joining surface of the other rib forming portion; and a screw insertion hole is provided in the support cylinder forming portion in a direction perpendicular to the axis; the second component has the same shape as the first component, and is configured to be connectable to the first component by butting the respective joining planes together, fitting the mating convex portion into the mating concave portion, and snap-engaging the engaging claw into the engaging concave portion, A support pipe subsidence prevention device characterized in that it is fixed to the support pipe held between the support tube forming portions of the first and second components by a drill screw that is screwed into the support pipe through the threaded hole.

2. 2. The support pipe subsidence prevention device according to claim 1, wherein the ground plate forming portions of the first and second structures are each provided with a pin insertion hole for inserting an anchor pin.

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