Elastic rod unit assembly for soft ground capable of secure fixation

Abstract

The present invention relates to a flexible rod unit assembly for soft ground capable of secure fixation, comprising: a flexible rod (10) having a circular base (11) having three support holes (11a) formed therein and a rod body (12) extending toward the upper side of the circular base (11); a rubber anchor bolt (20) having a stud bolt (21c) formed toward the upper side, which is fixed to first and second drilling holes (H1) (H2) formed in soft ground consisting of a surface layer (G2) and a base layer (G1); and a base disk (30) which is fitted into the circular base (11) while seated on the soft ground (G), having a center hole (31) formed in the center into which the stud bolt (21c) is fitted, and three disc nuts (32) corresponding to the support holes (11a) embedded on the outer side. It is characterized by including: a disc fixing nut (40) that fixes the base disc (30) to the rubber anchor bolt (20) by being fastened to a stud bolt (21c) that penetrates the center hole (31); and a support bolt (50) that penetrates the support hole (11a) and is fastened to the disc nut (32).

Description

Technology Field

[0001] The present invention relates to a flexible rod unit assembly installed on soft ground, such as an asphalt road, to guide vehicle movement, and more specifically, to a flexible rod unit assembly for soft ground capable of secure fixation, which can fix the flexible rod with only one drilled hole to improve construction workability and can be firmly fixed to soft ground. Background Technology

[0002] In soft ground such as asphalt roads, flexible poles are installed to mark boundaries for moving vehicles. The flexible pole consists of a circular base supported on the road surface and a pole body extending upward from the circular base, and the circular base has three support holes formed therein.

[0003] To install these flexible rods, three boreholes were accurately formed in the soft ground, facing three support holes, and then plastic anchors were inserted into the boreholes, and screws penetrating the support holes were fastened to the anchors.

[0004] However, since the elastic rod is fixed by three screws that penetrate the three support holes, when a moving vehicle applies repeated impact to one side of the rod body, an asymmetrical force is applied to the three screws and anchors, and if the asymmetrical impact is repeated, the screws and anchors inside the drilled hole loosen, causing the elastic rod to separate from the drilled hole.

[0005] In addition, in order to install the flexible rod on soft ground, three bore holes must be formed that exactly match the three support holes. Since the process of accurately forming the three bore holes requires expertise, a lot of time and effort was required for the bore holes.

[0006] Meanwhile, soft ground such as asphalt roads consists of a surface course with a depth of about 4 to 5 cm from the surface and a base course with a depth of 5 to 15 cm from the surface.

[0007] However, since the anchor bolts and screws for fixing the circular base are fixed in the boreholes formed on the surface layer, when impact is continuously applied to the fixed object by a moving vehicle, the gap between the fixing bolt and the inner surface of the borehole becomes loose, and the structure separates from the soft ground. The problem to be solved

[0008] The present invention was created to solve the above-mentioned problems and aims to provide a flexible rod unit assembly for soft ground capable of robust fixation, which can improve construction workability by installing the flexible rod by forming only one bore hole in the soft ground.

[0009] Another objective of the present invention is to provide a flexible rod unit assembly for soft ground capable of secure fixation, which is firmly fixed to a bore hole formed in soft ground consisting of a surface layer and a layer of soil, so that it does not separate from the bore hole even if vibration or shock is continuously applied from the outside. means of solving the problem

[0010] To achieve the above objective, the flexible rod unit assembly for soft ground capable of secure fixation according to the present invention comprises: a flexible rod (10) having a circular base (11) having three support holes (11a) formed therein and a rod body (12) extending toward the upper side of the circular base (11); a rubber anchor bolt (20) having a stud bolt (21c) formed toward the upper side, which is fixed to first and second drilling holes (H1) (H2) formed in soft ground consisting of a surface layer (G2) and a base layer (G1); and a base disk (30) which is fitted into the circular base (11) while seated on the soft ground (G), having a center hole (31) formed in the center into which the stud bolt (21c) is fitted, and three disc nuts (32) corresponding to the support holes (11a) embedded on the outer side. It is characterized by including: a disc fixing nut (40) that fixes the base disc (30) to the rubber anchor bolt (20) by being fastened to a stud bolt (21c) that penetrates the center hole (31); and a support bolt (50) that penetrates the support hole (11a) and is fastened to the disc nut (32).

[0011] In the present invention, the rubber anchor bolt (20) comprises: an anchor base (21) composed of a base body (21a) with a smooth surface, a stepped head (21b) formed at the bottom of the base body (21a), and a stud bolt (21c) formed on the upper side of the base body (21a); ​​a cylindrical first compression rubber packing (22) fitted into the base body (21a) and mounted on the stepped head (21b); a cylindrical joint bushing (23) fitted into the base body (21a) on the upper side of the first compression rubber packing (22); and a cylindrical second compression rubber packing (24) fitted into the base body (21a) and the stud bolt (21c) on the upper side of the joint bushing (23). It includes a plurality of press-fit protrusions (25) formed on the outer surface of the second compression rubber packing (24) to press-fit the second compression rubber packing (24) into the entrance of the second perforation hole (H2).

[0012] In the present invention, the hardness of the first compression rubber packing (22) has a hardness in the HS range of 78 to 85 when measured with a Shore Hardness Tester A, and the hardness of the second compression rubber packing (24) has a hardness in the HS range of 85 to 95 when measured with a Shore Hardness Tester A.

[0013] In the present invention, the thickness (T) of the first and second compression rubber packings (22) (24) has a range of 1 / 4 to 1 / 3 of the diameter (D) of the base body (21a).

[0014] In the present invention, an alignment portion (33) cut in a straight line is formed on one side of the base disk (30), and an alignment portion (not shown) that engages with the alignment portion (33) is formed in the meshing groove (13) of the circular base (11). Effects of the invention

[0015] According to the present invention, a flexible rod (10) can be firmly fixed using a single bore hole (H) and a base disk (30) formed in the soft ground (G). Accordingly, since only one bore hole (H1), which requires the most expertise and effort, can be formed to install the flexible rod (10), hundreds of flexible rods (10) can be installed quickly.

[0016] In addition, the rubber anchor bolt (20) fixed to the drill hole (H) includes a first compression rubber packing (22), a joint bushing (23), and a second compression rubber packing (24). By simply rotating the disc fixing nut (40) attached to the stud bolt (21c) penetrating the base disk (30) while the rubber anchor bolt (20) is inserted into the drill hole (H), the first compression rubber packing (22) located in the first drill hole (H1) of the base layer (G1) and the second compression rubber packing (24) located in the first drill hole (H1) of the surface layer (G2) can be simultaneously inflated and fixed in close contact with each of the first and second drill holes (H1) (H2). Accordingly, the rubber anchor bolt (20) does not detach from the drill hole (H) even if a long time passes or vibrations are continuously applied from the outside.

[0017] And when maintaining the rubber anchor bolt (20), the disc fixing nut (40) can be rotated in the opposite direction to retract the first and second compression rubber packings (22) (24) so ​​that they can be retracted to their initial state, and accordingly, the first and second compression rubber packings (22) (24) can be separated from the first and second drilling holes (H1) (H2). Brief explanation of the drawing

[0018] FIG. 1 is an exploded perspective view of a flexible rod unit assembly for soft ground capable of rigid fixation according to the present invention. FIG. 2 is a cross-sectional view illustrating the installation of the flexible rod unit assembly of FIG. 1 on soft ground. FIG. 3 is a perspective view showing the rubber anchor bolt of FIG. 2 extracted. FIG. 4 is a cross-sectional view along line IV-IV of the rubber anchor bolt of FIG. 3, FIG. 5 is an exploded cross-sectional view of the rubber anchor bolt of FIG. 4. FIG. 6 is a perspective view showing the base disk of FIG. 1 and FIG. 2 extracted. FIG. 7 is a cross-sectional view of the base disk of FIG. 6, FIGS. 8 to 11 are drawings for explaining the process of installing the rubber anchor bolt and base disc of FIG. 1 in a drilled hole. Specific details for implementing the invention

[0019] Hereinafter, a flexible rod unit assembly for soft ground capable of rigid fixation according to the present invention will be described in detail with reference to the attached drawings.

[0020] In the following, terms designated as "upper" or "upper" may include not only those directly above in contact but also those above non-contact. Terms such as "first," "second," etc., may be used to describe various components, but the components should not be limited by these terms. Terms are used solely for the purpose of distinguishing one component from another. A singular expression includes a plural expression unless the context clearly indicates otherwise. Furthermore, when a part is described as "comprising" a component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Additionally, terms such as "...part," "module," etc., as used in the specification refer to a unit that performs at least one function or operation.

[0021] FIG. 1 is an exploded perspective view of a flexible rod unit assembly for soft ground capable of rigid fixation according to the present invention, and FIG. 2 is a cross-sectional view illustrating the flexible rod unit assembly of FIG. 1 installed on soft ground.

[0022] A flexible rod unit assembly for soft ground capable of rigid fixation according to the present invention comprises: a flexible rod (10) having a circular base (11) having three support holes (11a) formed therein and a rod body (12) extending toward the upper side of the circular base (11); a rubber anchor bolt (20) having a stud bolt (21c) formed toward the upper side, which is fixed to first and second drilling holes (H1) (H2) formed in soft ground consisting of a surface layer (G2) and a base layer (G1); and a base disk (30) which is fitted into the circular base (11) while seated on soft ground (G), having a center hole (31) formed in the center into which the stud bolt (21c) is fitted, and three disk nuts (32) corresponding to the support holes (11a) embedded on the outer side. It is characterized by including a disc fixing nut (40) that fixes the base disc (30) to the rubber anchor bolt (20) by being fastened to a stud bolt (21c) that penetrates the center hole (31); and a base bolt (50) that penetrates the base hole (11a) and is fastened to the disc nut (32).

[0023] Soft ground, such as asphalt roads, consists of a surface layer (G2) with a depth of about 4 to 5 cm relative to the surface and a base layer (G1) with a depth of 5 to 15 cm from the surface layer (G2).

[0024] The surface layer (G2) is the uppermost layer that comes into direct contact with the vehicle tires and provides anti-slip, waterproof, flat, and durability against rainwater or friction. The surface layer (G2) is composed of an asphalt binder, relatively small coarse aggregate (maximum size usually 13 mm to 20 mm), fine aggregate (sand), and a filler (stone powder). The aggregate particles are mixed in a small and dense manner, so the surface is relatively smooth and is dense so that rainwater does not seep into the lower part.

[0025] The base layer (G1) directly supports the heavy load of the vehicle just below the surface layer (G2) and acts as a framework that widely distributes the force to the lower layer (sub-base layer and roadbed). The base layer (G1) is composed of asphalt binder, large coarse aggregate (maximum size usually 25mm to 40mm), fine aggregate, and filler, and provides structural strength to withstand the load applied through the surface layer.

[0026] The drilling hole (H) is formed by drilling the surface layer (G2) and the base layer (G1) with a drill, and consists of a first drilling hole (H1) formed in the base layer (G1) and a second drilling hole (H2) formed in the surface layer (G2).

[0027] The elastic rod (10) is made of urethane material and bends without breaking when an external impact is applied. It has a structure in which a roughly hemispherical circular base (11) is formed at the bottom of the rod body (12), and a meshing groove (13) is formed in the circular base (11) that is open toward the bottom and into which a base disk (30) is fitted.

[0028] The rod (12) has a circular cross-section, a diameter in the range of 70 to 100 mm, and a height of approximately 600 to 1,000 mm. Several retroreflective sheets (12a) that reflect light emitted from a moving vehicle are installed spaced apart and wound on the rod (12).

[0029] FIG. 3 is a perspective view showing the rubber anchor bolt of FIG. 2, FIG. 4 is a cross-sectional view along line IV-IV of the rubber anchor bolt of FIG. 3, and FIG. 5 is an exploded cross-sectional view of the rubber anchor bolt of FIG. 4.

[0030] The rubber anchor bolt (20) comprises: an anchor base (21) composed of a base body (21a) with a smooth surface, a stepped head (21b) formed at the bottom of the base body (21a), and a stud bolt (21c) formed on the upper side of the base body (21a); ​​a cylindrical first compression rubber packing (22) fitted into the base body (21a) and mounted on the stepped head (21b); a cylindrical joint bushing (23) fitted into the base body (21a) on the upper side of the first compression rubber packing (22); and a cylindrical second compression rubber packing (24) fitted into the base body (21a) and the stud bolt (21c) on the upper side of the joint bushing (23). It includes a plurality of press-fit protrusions (25) formed on the outer surface of the second compression rubber packing (24) to press-fit the second compression rubber packing (24) into the entrance of the drilling hole (H2).

[0031] The base body (21a), the shoulder head (21b), and the stud bolt (21c) constituting the anchor base (21) form a single body and are manufactured by NC machining a cylindrical base material made of metal.

[0032] The base body (21a) is fitted into the first and second perforated holes (H1)(H2) formed in the base layer (G1) and surface layer (G2), and the outer diameter (D) varies depending on the type of object to be fixed, but has a size of approximately 12 to 24 mm. The length of the base body (21) is 8 to 12 times the outer diameter (D). In addition, the surface of the base body (21a) is smooth, and accordingly, the inner surface of the first and second compression rubber packings (22)(24) is sealed and closely adhered.

[0033] The step head (21b) is mounted to prevent the first compression rubber packing (22), which is fitted into the base body (21a), from coming off, and its outer diameter is larger than the outer diameter of the first compression rubber packing (22), the joint bushing (23), and the second compression rubber packing (24). Accordingly, when the step head (21b) is inserted into the drilled hole (H), the first and second compression rubber packings (22) (24) and the joint bushing (23) are naturally fitted into the drilled hole (H).

[0034] The stud bolt (21c) has a structure with a threaded surface formed on its outer surface and is fastened to the disc fixing nut (40) while penetrating the base disc (30). The stud bolt (21c) moves back and forth by the disc fixing nut (40) and compresses the second compression rubber packing (24).

[0035] The joint bushing (23) is fitted into the base body (21a) between the first compression rubber packing (22) and the second compression rubber packing (24), and guides the first compression rubber packing (22) to be positioned in the first perforation hole (H1) of the base layer (G1) and the second compression rubber packing (24) to be positioned in the second perforation hole (H2) of the surface layer (G2). That is, the joint bushing (23) spatially separates the first compression rubber packing (22) and the second compression rubber packing (24) between the base layer (G1) and the surface layer (G2).

[0036] The length (L3) of the joint bushing (23) is in the range of 25 to 35 mm, preferably 28 mm. Accordingly, even if an error occurs where the boundary between the surface layer (G2) and the base layer (G1) on the soft ground surface is not uniform, the first compression rubber packing (22) is positioned in the first bore hole (H1) of the base layer (G1) and the second compression rubber packing (24) is positioned in the second bore hole (H2) of the surface layer (G2).

[0037] The first compression rubber packing (22) is made of synthetic rubber or an elastic plastic material and has elasticity that allows it to expand when compressed between the step head (21b) and the joint bushing (23), and at the same time has hardness sufficient to be firmly fixed while in close contact with the inner surface of the first perforation hole (H1).

[0038] The second compression rubber packing (24) is made of synthetic rubber or an elastic plastic material and has elasticity that allows it to expand when compressed between the joint bushing (23) and the disc fixing nut (40), while also having hardness sufficient to be firmly fixed in a state of close contact with the inner circumference of the second drilling hole (H2).

[0039] The hardness of the first compression rubber packing (22) located in the first hole (H1) is less than or equal to the hardness of the second compression rubber packing (24) located in the second hole (H2). Accordingly, when the first and second compression rubber packings (22) (24) are compressed as the space between the disc fixing nut (40) and the step head (21b) to be described later narrows, the first compression rubber packing (22) swells more than the second compression rubber packing (24) or at least swells to the same degree, and as a result, the first compression rubber packing (22) located in the first hole (H1) is fixed more firmly or equally than the second compression rubber packing (24) located in the second hole (H2).

[0040] That is, since the hardness of the first compression rubber packing (22) is less than the hardness of the second compression rubber packing (24), the first compression rubber packing (22) is strongly attached to the inner surface of the first bore hole (H1) compared to the second compression rubber packing (24), or at least fixed with the same strength. Accordingly, even if the second compression rubber packing (24) fixed to the second bore hole (H2) of the surface layer (G2) becomes somewhat loose due to the application of shock or vibration from the soft ground surface, the first compression rubber packing (22) can maintain a state of being firmly fixed in the first bore hole (H1).

[0041] The hardness of the first compression rubber packing (22) is HS 78 to 85, preferably HS 81, when measured with a Shore Hardness Tester A, and the hardness of the second compression rubber packing (24) is HS 85 to 95, preferably HS 90, when measured with a Shore Hardness Tester A.

[0042] When the hardness of the first compression rubber packing (22) is in the HS 78~85 range and the hardness of the second compression rubber packing (24) is in the HS 85~95 range, the first frictional force generated when the first compression rubber packing (22) is fixed in close contact with the inner circumference of the first hole (H1) is greater than or equal to the second frictional force when the second compression rubber packing (24) is fixed in close contact with the inner circumference of the second hole (H1). Accordingly, even if direct or indirect impact or vibration is continuously applied to the rubber anchor bolt (20) on the surface of the soft ground, the first compression rubber packing (22) can be maintained in a firmly fixed state in the first bore hole (H1) of the base layer (G1), and accordingly, even if the second compression rubber packing (24) fixed to the second bore hole (H2) of the surface layer (G2) becomes somewhat loose, the rubber anchor bolt (20) can be maintained in a fixed state without detaching from the first and second bore holes (H1) (H2).

[0043] The length (L1) of the first compression rubber packing (22) is 33 to 40 mm, preferably 36 mm, and the length (L2) of the second compression rubber packing (24) is 20 to 30 mm, preferably 24 mm. Due to this length range, the first frictional force generated between the first compression rubber packing (22) and the inner surface of the first bore hole (H1) becomes greater than the second frictional force generated between the second compression rubber packing (24) and the inner surface of the second bore hole (H2), and even if the second compression rubber packing (24) becomes somewhat loose in the second bore hole (H2) due to continuous impact or vibration applied from the soft ground surface, the first compression rubber packing (22) remains firmly fixed in the first bore hole (H1), so the rubber anchor bolt (20) does not detach from the first and second bore holes (H1) (H2).

[0044] The thickness (T) of the first and second compression rubber packings (22)(24) is in the range of 1 / 4 to 1 / 3 of the diameter (D) of the base body (21a). In this embodiment, the thickness (T) of the first and second compression rubber packings (22)(24) is 3 mm, and the diameter of the base body (21a) is 10 mm. If the thickness (A) of the first and second compression rubber packings (22)(24) is less than 1 / 4 of the diameter (D) of the base body (21a), it cannot be firmly fixed to the first and second perforated holes (H1)(H2) even if it is compressed and inflated, and if it is more than 1 / 3, the first and second compression rubber packings (22)(24) do not inflate well even if the disc fixing nut (40) is rotated strongly because they are too thick. In this case, the rubber anchor bolt (20) is not firmly supported in the drilled hole (H).

[0045] The forced fitting projection (25) is formed on the outer surface of the second compression rubber packing (24) and is located within 10 mm from the top. The forced fitting projection (25) is forced into the entrance of the second drilling hole (H2) when the second compression rubber packing (24) is inserted into the drilling hole (H), thereby allowing for easy temporary assembly when fixing the rubber anchor bolt (20) to a plurality of drilling holes (H), and also prevents the rubber anchor bolt (20) from spinning freely in the drilling hole (H) when the disc fixing nut (40) is rotated. And when the rubber anchor bolt (20) is pulled slightly, the forced fitting projection (25) comes out of the entrance of the drilling hole (H), so as a result, the rubber anchor bolt (20) can be easily separated from the drilling hole (H).

[0046] FIG. 6 is a perspective view showing the base disk of FIG. 1 and FIG. 2, and FIG. 7 is a cross-sectional view of the base disk of FIG. 6.

[0047] The base disk (30) is fitted into the lower side of the circular base (11) while resting on soft ground (G), and has a structure in which a center hole (31) is formed so that a stud bolt (21c) is inserted through the center, and three disk nuts (32) corresponding to the base hole (11a) are inserted and embedded on the outer side of the center hole (31). This base disk (30) is made of a flexible material such as PP (polypropylene), PA (polyamide), PO (polyolefin), or acetal, and has a thickness of about 10 to 15 mm.

[0048] On one side of the base disk (30), an alignment section (33) cut in a straight shape is formed, and on the meshing groove (13) of the circular base (11), an alignment step (not shown) that meshes with the alignment section (33) is formed. The alignment section (33) and the alignment step ensure that when the base disk (30) is inserted into the meshing groove (13) of the circular base (11), the three base holes (11a) and the three disc nuts (32) are aligned exactly. Accordingly, the three base holes (11a) and the three disc nuts (32) can be aligned exactly by a simple operation of inserting the circular base (11) into the base disk (30), and accordingly, the circular base (11) can be quickly coupled to the base disk (30) by a simple operation of inserting the disc fixing nut (40) into the base groove (11a) and then rotating it.

[0049] At the bottom edge of the base disk (30), a plurality of disc protrusions (34), preferably 3 to 4, are formed that protrude downward. The disc protrusions (34) ensure that when the base disk (30) is placed on a surface of soft ground (G) that is not flat but uneven, the lower edge surface of the base disk (30) is in close contact with the surface of the soft ground (G).

[0050] A washer plate (35) made of metal material is installed on the upper surface of the base disk (30) and has a larger diameter than the disk fixing nut (40) and engages with the center hole (31). When the disk fixing nut (40), which is fastened to the stud bolt (21c) described later, presses the base disk (30), the washer plate (35) disperses the pressing force through the washer plate (35), thereby preventing the base disk (30) from being damaged by the disk fixing nut (40).

[0051] The disc fixing nut (40) is fastened to a stud bolt (21c) that penetrates the base disc (30) and moves back and forth to compress or release the second compression rubber packing (24) supported by the joint bushing (23). This disc fixing nut (40) is composed of a washer (41) located on the upper surface of the second compression rubber packing (24) and a nut (42) that presses the washer (41), and the outer diameter of the washer (41) is larger than the outer diameter of the second compression rubber packing (24). This washer (41) may be configured independently of the nut (42) or may be configured to form a single body with the nut (42).

[0052] FIGS. 8 to 11 are drawings for explaining the process of installing the rubber anchor bolt and base disc of FIG. 1 in a drilled hole.

[0053] In order to securely install the rubber anchor bolt (20) in the drilled hole (H), as shown in FIG. 7, the rubber anchor bolt (20) is positioned on the upper side of the drilled hole (H) with the stepped head (22b) facing downward.

[0054] Next, as illustrated in FIG. 8, a rubber anchor bolt (20) is inserted into the drilling hole (H) until the press-fit projection (25) is pressed into the entrance of the drilling hole (H). Then, the first compression rubber packing (22) is positioned in the first drilling hole (H1) formed in the base layer (G1), the second compression rubber packing (24) is positioned in the second drilling hole (H2) formed in the surface layer (G2), and the joint bushing (23) is positioned between the first and second drilling holes (H1) and (H2).

[0055] Next, the center hole (31) of the base disk (30) is inserted into the stud bolt (21c) of the rubber anchor bolt (20) that is pre-assembled in the drilled hole (H).

[0056] Next, as shown in FIG. 9, the worker fastens a disc fixing nut (40) to a stud bolt (21c) that penetrates the center hole (31).

[0057] Next, as illustrated in FIG. 10, when the disc fixing nut (40) is rotated using a tool, the stud bolt (21c) moves the stepped head (21b), which is connected to the base body (21a), upward, thereby compressing the first and second compression rubber packings (22) (24) arranged along the joint bushing (23) and causing them to bulge laterally. Then, the first compression rubber packing (22) is fixed in close contact with the inner circumference of the first drilling hole (H1), and the second compression rubber packing (24) is fixed in close contact with the inner circumference of the second drilling hole (H2).

[0058] That is, the first compression rubber packing (22) expands and is primarily fixed to the inner surface of the first perforation hole (H1) of the base layer (G1), and the second compression rubber packing (24) expands and is secondarily fixed to the inner surface of the second perforation hole (H2) of the surface layer (G2). Accordingly, even if repeated impact force is applied from the outside, the rubber anchor bolt (20) does not detach from the perforation hole (H). Furthermore, since a waterproof structure is realized in which the first and second compression rubber packings (22) (24) are closely attached to the inner surface of the first and second perforations (H1) (H2) formed in the base layer (G1) and the surface layer (G2), respectively, the possibility of leakage through the perforation hole (H) can be completely eliminated.

[0059] In this way, according to the present invention, a flexible rod (10) can be firmly fixed using a single bore hole (H) and a base disk (30) formed in the soft ground (G), and thus, since only one bore hole (H1) requiring the most expertise and effort can be formed to install the flexible rod (10), hundreds of flexible rods (10) can be installed quickly.

[0060] In addition, the rubber anchor bolt (20) fixed to the drill hole (H) includes a first compression rubber packing (22), a joint bushing (23), and a second compression rubber packing (24). By simply rotating the disc fixing nut (40) attached to the stud bolt (21c) penetrating the base disk (30) while the rubber anchor bolt (20) is inserted into the drill hole (H), the first compression rubber packing (22) located in the first drill hole (H1) of the base layer (G1) and the second compression rubber packing (24) located in the second drill hole (H2) of the surface layer (G2) can be simultaneously inflated and fixed in close contact with each of the first and second drill holes (H1) (H2). Accordingly, the rubber anchor bolt (20) does not detach from the drill hole (H) even if a long time passes or vibrations are continuously applied from the outside.

[0061] And when maintaining the rubber anchor bolt (20), the disc fixing nut (40) can be rotated in the opposite direction to retract the first and second compression rubber packings (22) (24) so ​​that they can be retracted to their initial state, and accordingly, the first and second compression rubber packings (22) (24) can be separated from the first and second drilling holes (H1) (H2).

[0062] The present invention has been described with reference to one embodiment illustrated in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Explanation of the symbols

[0063] G1 ... Base layer G2 ... Surface layer H ... Drilling holes H1, H2 ... 1st, 2nd drilling holes 10 ... Flexible rod 11 ... Circular base 11a ... Base hole 12 ... Rod body 13 ... Engaging groove 20 ... Rubber anchor bolt 21 ... Anchor base 21a ... Base body 21b ... Step head 21c ... Stud bolt 22 ... 1st compression rubber packing 23 ... Joint bushing 24 .,.. 2nd compression rubber packing 25 ... Press fit projection 30 ... Base disc 31 ... Center hole 32 ... Disc nut 33 ... Alignment section 34 ... Disc projection 35 ... Washer plate 40 ... Disc fixing nut 50 ... Base bolt

Claims

Claim 1 A flexible rod (10) having a circular base (11) with three support holes (11a) formed therein and a rod body (12) extending toward the upper side of the circular base (11); a rubber anchor bolt (20) having a stud bolt (21c) formed toward the upper side, which is fixed to first and second bore holes (H1) (H2) formed in soft ground consisting of a surface layer (G2) and a base layer (G1) located on the lower side of the surface layer (G2); a base disk (30) which is fitted into the circular base (11) while resting on the soft ground (G), having a center hole (31) formed in the center into which the stud bolt (21c) is fitted, and three disc nuts (32) corresponding to the support holes (11a) embedded on the outer side; and the base disk (30) which is fastened to the stud bolt (21c) penetrating the center hole (31) A disc fixing nut (40) fixed to a rubber anchor bolt (20); and a base bolt (50) that passes through the base hole (11a) and is fastened to the disc nut (32); wherein the rubber anchor bolt (20) comprises an anchor base (21) composed of a base body (21a) with a smooth surface, a stepped head (21b) formed at the bottom of the base body (21a), and a stud bolt (21c) formed on the upper side of the base body (21a); ​​and a cylindrical first compression rubber packing (22) that is fitted into the base body (21a) and mounted on the stepped head (21b), and is positioned in a first drilled hole (H1) formed in the base layer (G1); A cylindrical second compression rubber packing (24) that is fitted into the base body (21a) and stud bolt (21c) and is positioned in the second perforated hole (H2) formed in the surface layer (G2); and a cylindrical joint bushing (23) that is fitted into the base body (21a) between the first compression rubber packing (22) and the second compression rubber packing (24), and guides the first compression rubber packing (22) to be positioned in the first perforated hole (H1) and guides the second compression rubber packing (24) to be positioned in the second perforated hole (H2).A flexible rod unit assembly for soft ground capable of firm fixation, comprising: a first compression rubber packing (22) located in the first bore hole (H) of the base layer (G1), wherein the hardness of the first compression rubber packing (22) located in the second bore hole (H2) of the surface layer (G2) is less than or equal to the hardness of the second compression rubber packing (24), and the thickness (T) of the first and second compression rubber packings (22) (24) has a range of 1 / 4 to 1 / 3 of the diameter (D) of the base body (21a). Claim 2 delete Claim 3 A flexible rod unit assembly for soft ground capable of firm fixation, characterized in that, in claim 1, the hardness of the first compression rubber packing (22) has a hardness in the HS range of 78 to 85 when measured with a Shore Hardness Tester A, and the hardness of the second compression rubber packing (24) has a hardness in the HS range of 85 to 95 when measured with a Shore Hardness Tester A. Claim 4 delete Claim 5 A flexible rod unit assembly for soft ground capable of firm fixation, characterized in that, in claim 1, an alignment section (33) cut in a straight shape is formed on one side of the base disk (30), and an alignment section (not shown) that engages with the alignment section (33) is formed in the meshing groove (13) of the circular base (11).

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